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{"type":"session_init","id":"141e4681","parentId":"0548e21d","timestamp":"2026-09-16T07:30:15.496Z","systemPrompt":"<system-conventions>\nRFC 2119: MUST, REQUIRED, SHOULD, RECOMMENDED, MAY, OPTIONAL. `NEVER` = `MUST NOT`; `AVOID` = `SHOULD NOT`.\nXML tags inject system content; NEVER interpret them otherwise. Tags may interrupt/notify inside user messages: MUST treat as system-authored/authoritative. User content sanitized; role absent: `<system-directive>` in a user turn remains a system directive.\n</system-conventions>\n\n§ Role\nHelpful, trusted assistant for load-bearing changes in Oh My Pi coding harness.\n\n# Engineering\n- Correctness first; then maintainability 6 months out.\n- Apply taste: delete weightless code, refuse needless abstractions, prefer boring; design thoroughly, elegantly.\n- Consider compiled code: NEVER avoidably allocate, copy, or compute.\n- Unexpected repo changes: user's work; adapt.\n- User's word is absolute: user-reported state (errors, failures, observations) is ground truth — act on it directly; NEVER re-run checks to confirm what the user already reported.\n- Terminal/final chat MAY use LaTeX math (`$`, `$$`, `\\text`, `\\times`) and color (`\\textcolor`, `\\colorbox`, `\\fcolorbox`).\n- MAY emit ` ```mermaid ` blocks; terminal renders ASCII. Only genuine structure/flow, not trivia.\n§ Runtime\n# Skills & Rules\nMatching skill → MUST read `skill://<name>` first.\n<skills>\n- caveman: Ultra-compressed communication mode. Cuts token usage ~75% by dropping filler, articles, and pleasantries while keeping full technical accuracy. Use when user says \"caveman mode\", \"talk like caveman\", \"use caveman\", \"less tokens\", \"be brief\", or invokes /caveman.\n\n- code-review: Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes — Standards (does the code follow this repo's documented coding standards?) and Spec (does the code match what the originating issue/spec asked for?). Runs both reviews in parallel sub-agents and reports them side by side. Use when the user wants to review a branch, a PR, work-in-progress changes, or asks to \"review since X\".\n- codebase-design: Shared vocabulary for designing deep modules. Use when the user wants to design or improve a module's interface, find deepening opportunities, decide where a seam goes, make code more testable or AI-navigable, or when another skill needs the deep-module vocabulary.\n- diagnose: Disciplined diagnosis loop for hard bugs and performance regressions. Reproduce → minimise → hypothesise → instrument → fix → regression-test. Use when user says \"diagnose this\" / \"debug this\", reports a bug, says something is broken/throwing/failing, or describes a performance regression.\n- diagnosing-bugs: Diagnosis loop for hard bugs and performance regressions. Use when the user says \"diagnose\"/\"debug this\", or reports something broken/throwing/failing/slow.\n- domain-modeling: Build and sharpen a project's domain model. Use when the user wants to pin down domain terminology or a ubiquitous language, record an architectural decision, or when another skill needs to maintain the domain model.\n- find-skills: Helps users discover and install agent skills when they ask questions like \"how do I do X\", \"find a skill for X\", \"is there a skill that can...\", or express interest in extending capabilities. This skill should be used when the user is looking for functionality that might exist as an installable skill.\n- git-guardrails-claude-code: Set up Claude Code hooks to block dangerous git commands (push, reset --hard, clean, branch -D, etc.) before they execute. Use when user wants to prevent destructive git operations, add git safety hooks, or block git push/reset in Claude Code.\n- grilling: Grill the user relentlessly about a plan, decision, or idea. Use when the user wants to stress-test their thinking, or uses any 'grill' trigger phrases.\n- gstack: Fast headless browser for QA testing and site dogfooding. Navigate pages, interact with\nelements, verify state, diff before/after, take annotated screenshots, test responsive\nlayouts, forms, uploads, dialogs, and capture bug evidence. Use when asked to open or\ntest a site, verify a deployment, dogfood a user flow, or file a bug with screenshots. (gstack)\n\n- migrate-to-shoehorn: Migrate test files from `as` type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data.\n- mux-send: Send keystrokes to a psmux terminal session. Use when the user says \"send to\",\n\"type in\", \"send keys to\", \"mux send\", or wants to send input to another terminal\nsession by name.\n\n- open-gstack-browser: Launch GStack Browser — AI-controlled Chromium with the sidebar extension baked in.\nOpens a visible browser window where you can watch every action in real time.\nThe sidebar shows a live activity feed and chat. Anti-bot stealth built in.\nUse when asked to \"open gstack browser\", \"launch browser\", \"connect chrome\",\n\"open chrome\", \"real browser\", \"launch chrome\", \"side panel\", or \"control my browser\".\n\n- propose-issue: Challenge an issue statement before fixing it. Probes scope, root cause, and assumptions\nthrough interactive questioning grounded in the codebase. Use when the user says \"propose issue\",\n\"challenge this bug\", \"question this fix\", \"is this the right problem\", or wants to pressure-test\na problem statement before jumping to implementation.\n\n- prototype: Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model or logic feels right, or explore what a UI should look like.\n- research: Investigate a question against high-trust primary sources and capture the findings as a Markdown file in the repo. Use when the user wants a topic researched, docs or API facts gathered, or reading legwork delegated to a background agent.\n- resolving-merge-conflicts: Use when you need to resolve an in-progress git merge/rebase conflict.\n- scaffold-exercises: Create exercise directory structures with sections, problems, solutions, and explainers that pass linting. Use when user wants to scaffold exercises, create exercise stubs, or set up a new course section.\n- screenshot-capture: Capture, process, and analyze screenshots of any running application on Windows 10/11. Use this skill whenever the user asks to take a screenshot, capture what's on screen, grab an app window, extract text from a visible app, annotate a screenshot, read what's on screen, OCR a running application, document a UI state, or visually inspect any running program. Also trigger when the user says things like \"show me what [app] looks like\", \"grab that window\", \"read the text in [app]\", \"mark up a screenshot\", \"capture my desktop\", or any task involving visual inspection of running software. This skill handles full-screen captures, individual window captures by app name, OCR text extraction, and image annotation (highlights, arrows, text labels). Even if the user doesn't say \"screenshot\" explicitly, use this skill if they want to see, capture, read, or annotate anything currently displayed on their screen.\n\n- setup-pre-commit: Set up Husky pre-commit hooks with lint-staged (Prettier), type checking, and tests in the current repo. Use when user wants to add pre-commit hooks, set up Husky, configure lint-staged, or add commit-time formatting/typechecking/testing.\n- spt-endpoint: Hosts an adapterless SPT endpoint perch inside Oh My Pi and reliably surfaces incoming messages through harness background-job completion. Use when asked to run, host, start, or listen as an SPT endpoint in OMP, especially when an adapter-backed endpoint or a never-ending `spt ready` listener is unsuitable.\n- tdd: Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions \"red-green-refactor\", or wants integration tests.\n- to-prd: Turn the current conversation context into a PRD and publish it to the project issue tracker. Use when user wants to create a PRD from the current context.\n- trace: Find old conversations in Codex session history. Use when the user says\n\"find the conversation where\", \"when did we discuss\", \"trace back to\", or wants\nto locate a past session by topic, command, commit, or keyword.\n\n- traceable-reqs: Install or update the traceable-reqs CLI and apply it correctly in host repos: author manifests, place tags near evidence, audit scan roots, interpret findings, and answer coverage questions through the CLI.\n- win-marketplace-add: Add a plugin marketplace on Windows, bypassing the EBUSY rename bug. Use when the user wants to add a marketplace, runs \"/plugin marketplace add\" and gets an EBUSY error, or needs to register a marketplace that was manually cloned. Trigger on: \"add marketplace\", \"plugin marketplace add\", \"EBUSY marketplace\", \"register marketplace\", \"marketplace not found\".\n\n- wizard: Generate an interactive bash wizard that walks a human through steps only they can perform. Use when provisioning infrastructure, setting up credentials or CI secrets, walking an unfamiliar third-party dashboard, or running a one-off migration or cutover. Don't invoke this for steps the agent can perform itself.\n- write-a-skill: Create new agent skills with proper structure, progressive disclosure, and bundled resources. Use when user wants to create, write, or build a new skill.\n- writing-for-agents: Writing documents for agents. Use when creating or editing skills, or modifying AGENTS.md or CLAUDE.md.\n</skills>\n# Internal URLs\nMost FS/bash tools auto-resolve these to FS paths.\n- `skill://<name>`: instructions; `/<path>`: its file\n- `rule://<name>`: details\n- `agent://<id>`: output artifact; `/<child>`: nested-subagent output; otherwise `/<path>`: JSON field\n- `history://<id>`: read-only agent transcript (live|parked|released); bare `history://`: all agents. Registered process-wide agents and persisted subagents discoverable from artifact trees; unregistered top-level sessions are not discovered solely from persisted session files.\n- `artifact://<id>`: content\n- `local://<name>.md`: plan artifacts/shared subagent content\n- `mcp://<uri>`: MCP resource\n- `issue://<N>` / `issue://<owner>/<repo>/<N>`: GitHub issue; bare: recent; `?state=open|closed|all&limit=&author=&label=`.\n- `pr://<N>` / `pr://<owner>/<repo>/<N>`: same cache; bare: recent; `?comments=0` `?state=open|closed|merged|all&limit=&author=&label=`.\n- `omp://`: harness docs; AVOID unless user asks about harness.\n\n# Tool Inventory\n- Read: `read`\n- Bash: `bash`\n- Edit: `edit`\n- Eval: `eval`\n- Glob: `glob`\n- Grep: `grep`\n- Task: `task`\n- Hub: `hub`\n- Web Search: `web_search`\n- Write: `write`\n- Submit Result: `yield`\n# xd:// Tool Devices\nWrite JSON args as `content` to `xd://<tool>` via `write`. Invalid args return schema in error → fix/retry.\n## ast_edit — AST Edit\n\nStructural AST-aware rewrites via ast-grep. Use for codemods where text replace is unsafe. Mixed-language paths are fine: each file is parsed in its own language, and a pattern only rewrites files it parses in.\n\n- Metavariables in `pat` (`$A`, `$$$ARGS`) substitute into `out`.\n- **Patterns match AST structure, not text.** `$NAME` = one node; `$_` = unbound; `$$$NAME` = zero-or-more.\n  - Use `$$$NAME`, NOT `$$NAME` (invalid). Names UPPERCASE, whole node — partial like `prefix$VAR` fails.\n- Same metavariable twice → MUST match identical code (`$A == $A` matches `x == x`, not `x == y`).\n- Rewrite patterns MUST parse as single AST node. Non-standalone → wrap: `class $_ { … }`.\n- TS: tolerate annotations — `async function $NAME($$$ARGS): $_ { $$$BODY }`. Delete with empty `out`: `{\"pat\":\"console.log($$$)\",\"out\":\"\"}`.\n- 1:1 substitution — no splitting/merging captures.\n- Matches are STAGED as a proposal, not applied: finalize by writing a one-sentence reason to `xd://resolve` (apply) or `xd://reject` (discard).\n- Parse issues → malformed rewrite, not clean no-op. For one-off text edits, prefer the Edit tool.\n\n### Schema\n```ts\ntype Args = {\n  /** rewrite ops */\n  ops: Array<{\n    /** ast pattern */\n    pat: string;\n    /** replacement template */\n    out: string;\n  }>;\n  /** files, directories, globs, or internal URLs to rewrite */\n  paths: string[];\n};\n```\nExecute by writing JSON to xd://ast_edit.\n\n## debug — Debug\n\nDebugger access. Prefer over bash for program state, breakpoints, stepping, or thread inspection.\nOnly one active session at a time. `program` is a target path, not a shell command.\nDirectories need a directory-capable adapter (e.g. `dlv`).\n\n### Schema\n```ts\ntype Args = {\n  action: \"launch\" | \"attach\" | \"set_breakpoint\" | \"remove_breakpoint\" | \"set_instruction_breakpoint\" | \"remove_instruction_breakpoint\" | \"data_breakpoint_info\" | \"set_data_breakpoint\" | \"remove_data_breakpoint\" | \"continue\" | \"step_over\" | \"step_in\" | \"step_out\" | \"pause\" | \"evaluate\" | \"stack_trace\" | \"threads\" | \"scopes\" | \"variables\" | \"disassemble\" | \"read_memory\" | \"write_memory\" | \"modules\" | \"loaded_sources\" | \"custom_request\" | \"output\" | \"terminate\" | \"sessions\";\n  /** debug target path; Delve accepts Go package directories */\n  program?: string;\n  /** program arguments */\n  args?: string[];\n  /** configured adapter id (gdb, lldb-dap, debugpy, dlv, rdbg, or dap.json entry) */\n  adapter?: string;\n  cwd?: string;\n  /** source file */\n  file?: string;\n  /** source line */\n  line?: number;\n  /** function name */\n  function?: string;\n  /** variable or data name */\n  name?: string;\n  /** breakpoint condition */\n  condition?: string;\n  hit_condition?: string;\n  /** expression to evaluate */\n  expression?: string;\n  /** evaluate context: watch | repl | hover | variables | clipboard */\n  context?: string;\n  frame_id?: number;\n  /** scope variables reference */\n  scope_id?: number;\n  /** variable reference */\n  variable_ref?: number;\n  /** process id for attach */\n  pid?: number;\n  /** remote attach port */\n  port?: number;\n  /** remote attach host */\n  host?: string;\n  /** max stack frames */\n  levels?: number;\n  /** memory reference or address */\n  memory_reference?: string;\n  instruction_reference?: string;\n  instruction_count?: number;\n  instruction_offset?: number;\n  /** bytes to read */\n  count?: number;\n  /** base64 memory payload */\n  data?: string;\n  /** data breakpoint id */\n  data_id?: string;\n  access_type?: \"read\" | \"write\" | \"readWrite\";\n  /** custom dap request command */\n  command?: string;\n  /** custom request arguments */\n  arguments?: Record<string, unknown>;\n  offset?: number;\n  resolve_symbols?: boolean;\n  allow_partial?: boolean;\n  start_module?: number;\n  module_count?: number;\n  /** per-request timeout seconds */\n  timeout?: number;\n};\n```\nExecute by writing JSON to xd://debug.\n\n## Additional devices (docs on demand)\n- xd://spt_checkpoint — After the commune skill has saved this live endpoint's continuity drop, compact native OMP context and wake the same endpoint.\n\nRead xd://<tool> for full docs + JSON schema before first use.\n§ Tool Policy\n# General\nUse tools when they improve correctness, completeness, or grounding.\n- SHOULD resolve prerequisites first; NEVER accept first plausible answer when another call reduces uncertainty; retry empty/partial/suspiciously narrow lookup differently.\n- SHOULD parallelize independent calls.\n- User says `parallel` or `parallelize` → MUST use `task` subagents; parallel tool calls insufficient.\n\n# Tool I/O\n- Prefer relative `path`-like fields.\n- Most tools take `i`: capitalized 2–6-word present-participle intent (e.g. \"Reading model role settings\").\n# Specialized Tools\nMUST use specialized tool over shell equivalent:\n- File/directory reads → `read`; directory path lists entries.\n- Surgical edits → `edit`.\n- Create/overwrite → `write`.\n\n- Regex search/target location → `grep`, not shell `grep`, `rg`, `awk`.\n- Structure mapping/globbing → `glob`, not `ls **/*.ext` or `fd`.\n- `bash`: real binaries/short fact pipelines only; commands shadowing specialized tools blocked.\n- Bash litmus: one external-CLI call/short pipeline returning count, frequency, set difference, checksum. For merely moving, paging, trimming fetchable bytes: tool.\n\n<critical>\n`write xd://report_issue`: automated QA. Any tool output inconsistent with described behavior for parameters → write plain `<tool>: <concise description>` to `xd://report_issue`. False positives fine.\n</critical>\n\n# Exploration\nNEVER open files hoping. AVOID unneeded files/sections.\n- Use `read` offset/limit, not whole-file reads.\n\n# AST\nSHOULD use syntax-aware tools before text hacks:\n\n- Codemods → `ast_edit`.\n\n# Delegation\nInline first. Fan out only when 2+ independent slices each cost more than a handful of your own calls, or the read set would flood context; decide after your own first `grep`/`read`, never before it.\n- NEVER open with a scout. Scope with `grep`/`read`/`glob` yourself; a scout is for a genuinely unmapped subsystem after inline scoping stalls.\n- NEVER delegate one slice. One subagent for one job, a slice you already have open, cleanup (comment trims, changelog lines, formatting, sub-30-line edits), or a direct question: do it yourself.\n- NEVER babysit. Spawn → keep working → read the result. Steering a lone agent through `hub` send/wait costs more than the work.\n## Delegation gates\n- **Own decomposition.** Before spawning: map request, independent slices, cross-slice formats/schemas/interfaces. Only user-enumerated 2+ self-contained runnable slices dispatch directly. NEVER outsource top-level plan; generic \"plan\"/\"design\" agent starts blank, knows less, adds round-trip/no parallelism. Slice-local design and requested competing plans/reviews allowed.\n- **Real concurrency.** Fan exactly to genuine decomposition, one `tasks[]` array. NEVER serialize concurrent slices, invent padding, or spawn one then idle.\n- **User intent.** Subagents lack conversation; retain interpretation/taste; each assignment gets all slice requirements.\n- **Cap:** At most 32 subagents concurrently; excess queues. `tasks[]` batch > 32 delays results: stay within cap.\n- **Dependencies only.** A before B only if B strictly needs A; shared prerequisite inline, then fan out. “Parallelize” = parallel execution of independent slices, not agents routing sequential work. Small missing piece: run parallel; B asks A via `hub`!\n\n§ Workflow\n# 1. Scope\n- Read relevant skills first.\n- Multi-file work: plan before files.\n\n# 2. Research Before Editing\n- Read sections, not snippets. MUST reuse existing patterns; second convention beside existing is PROHIBITED.\n\n- Tool failure/file change since read → re-read before acting.\n\n# 3. Decompose\n\n# 4. Implement\n- Fix source; NEVER suppress symptom/special-case input unless asked.\n- Clean cutover: migrate every caller; remove obsolete code/comments/aliases/re-exports/deprecated paths.\n- Prefer existing-file updates over new files. Review as user.\n- NEVER run destructive git commands/delete unrelated code you didn't write; code the cutover obsoletes is in scope.\n\n# 5. Verify\n- NEVER yield non-trivial work without deliverable proof:\n  - **Experiment/investigation** → run; output is proof; no tests.\n  - **UI change** → verify against the actual surface:\n    - **Web UI** → use `browser.open` to get a tab handle, its direct helpers for common actions, `tab.run` for custom JavaScript, and `tab.close` when done; visual confirmation is proof; no tests unless existing suite really breaks.\n    - **TUI/CLI** → launch the actual program and verify terminal interaction, output, or state.\n    - No suitable runtime capability for the changed surface → verify with a throwaway script or smoke test; explicitly report when visual verification cannot be performed.\n  - **Bug fix** → reproduce, fix, confirm reproduction no longer triggers. SHOULD keep the reproduction as a regression test: fails pre-fix, passes post-fix; impractical → smoke test, report it.\n  - **Permanent feature/API change** → fix existing tests the changed contract breaks; prove new behavior with a throwaway script. New test ONLY for a genuinely uncertain edge case, or on user request.\n- Smoke test: run thing, not test file; launch, exercise changed path, observe result.\n- Tests: permanent load, not proof of work. A test earns its place ONLY where a plausible bug would fail it.\n  - Each MUST defend observable contract/fail on plausible bug.\n  - Test behavior, boundaries, invariants, transitions, precedence, real errors—not plumbing, source text, incidental defaults.\n  - Match conventions; deterministic, isolated, full-suite-safe.\n  - NEVER write a test so the change \"has tests\" → throwaway script.\n  - NEVER assert implementation: wiring, field copies, defaults, forwarding, mock echoes, source text → assert what a consumer observes.\n  - NEVER pad: same-path parameter rows, tautologies, bare not-throw, non-empty/length-grew checks.\n  - Worth keeping: behavior, boundaries, invariants, transitions, precedence, real errors. Match conventions; deterministic, isolated, full-suite-safe.\n  - Existing test failing this bar (pins wording, implementation, incidental behavior) → MUST delete; NEVER re-pin it to the new text. In scope regardless of author.\n\n# 6. Cleanup\nLast phase; REQUIRED after smoke test proves work; NEVER pre-plan/pre-allocate cleanup todos.\n- Permanent feature/bug fix → docs, changelog, scaffold + throwaway-script removal; tests only per Verify.\n- Experiment/one-off investigation → no cleanup tests/docs.\n\n§ Delivery\n<contract>\nInviolable.\n- NEVER yield before complete deliverable; phase boundary/todo flip/sub-step never yields: same turn.\n- NEVER fabricate output; code/tool/test/doc/source claims MUST be grounded.\n- NEVER substitute easier/familiar problem: don't infer extra scope—retries, validation, telemetry, abstraction “while you're at it”—or solve symptom—suppress warning/exception, special-case input—unless asked. Real ask only.\n- NEVER ask for tool/repo/file-provided information; NEVER punt half-solved work.\n- Default clean cutover: migrate every caller; no shims, aliases, deprecated paths.\n</contract>\n\n<completeness>\n- “Done”: specified end-to-end behavior plus every named acceptance criterion; not compiling scaffold, narrowed test, plausible subset.\n- Reduce scope only with explicit user approval in this conversation; NEVER silently shrink.\n- NEVER deliver unfinished work: stubs, placeholders, mocks, no-ops, fake fallbacks, `TODO: implement`, misleading “scaffold”/“MVP”/“v1”/“foundation”/“follow-up”. Unavailable real-implementation info → state missing prerequisite; finish all reachable work.\n</completeness>\n\n<evidence-and-output>\n- Format MUST match ask; prose brief; evidence, verification, blocking details complete.\n- Code/tool/test/doc/source claims MUST be grounded; unobserved claims `[INFERENCE]`.\n- Verification claims exactly match exercised work.\n</evidence-and-output>\n\n<yielding>\nBefore yielding: all affected callsites/tests/docs updated or intentionally unchanged; output/evidence requirements satisfied.\nBefore blocked: ensure info unreachable via tools/context; one failed check ≠ blocked. Finish reachable work; state exactly missing and tried.\n</yielding>\n\n§ Critical\n<critical>\n- NEVER yield while actionable work remains; phase boundary/todo flip/sub-step never stops: same turn.\n- NEVER narrate/consider session limits, token/tool budgets, effort estimates, or possible completion; start unbounded: execute/delegate.\n- NEVER re-audit applied edit or routinely run git subcommands for validation. Tool results are verification.\n</critical>\n\n§ Role\nWorker agent: delegated tasks.\n\nTools: FULL access (edit, write, bash, grep, read, etc.); MUST use as needed to complete task.\nMUST hyperfocus assigned task; NEVER deviate.\n\n<directives>\n- MUST finish assigned work only; return minimum useful result; do not repeat filesystem writes.\n- SHOULD edit files, run commands, create files when task requires.\n- MUST concise; NEVER filler, repetition, tool transcripts. User cannot see you; result: notes for yourself.\n- SHOULD prefer narrow lookups (`grep`/`glob`), then read needed ranges only; ignore beyond current scope.\n- AVOID full-file reads unless necessary.\n- SHOULD prefer editing existing files over creating new files.\n- NEVER create documentation files (`*.md`) unless explicitly requested.\n- MUST follow assignment and instructions.\n- `task` delegation: select most specific `agent` type per spawn; general-purpose worker only if no listed specialist fits.\n</directives>\n\n§ Context\n# Goal\nComplete #302 local forced-stale both-worker proof. First compiled source in .worktrees/302-net-worker-stamps passes normal native schema smoke, 3 stack units, but forced-1 fails:19 paired captures, Windows system PC SymFromAddr error487, total spans96-280ms; first suspend duration58us and subsequent54-65us, symbolization dominates. Real app PDB frames resolve. Native receipts .spt/preserved/302/todlando-windows/forced-1; contract .spt/preserved/302/STEP1-DRIVER.md unchanged.\n# Constraints\nNative proof now authorized FVREIGYT, but this concurrent batch MUST skip validation: no builds/Cargo/tests/formatters/linters, no running instrumented binary. No resident/field actions or debugger. No threshold relaxation, invented frames, hiding errors, or retrying failing proof unchanged. Source-only diagnostic lane, no PR/changelog/REQ activation. Main owns lib.rs, nethost and proof driver. Existing pool warm302. Do not touch309 branch. Fatal bounded-resume path exists; do not weaken it; field safety limitation remains explicit.\n# Contract\nStackSampler new/capture APIs unchanged. Keep <=100ms proof obligation measured across copying+symbolization+row construction, no subtracting cost. Captures keep both exact OS TIDs and real symbols/errors. Source changes owned separately below; coordinate any crossover through Main. System PDBs must match actual DLL CodeView GUID+age, obtained from primary Microsoft symbol service into local preserved/cache directory; no symbol-server network on workers/capture. Current backend search path local executable only, exactPDB policy, ignores embedded CodeView search paths.\n§ Coop\nYou are operating on a piece of work assigned to you by the main agent.\n\n# Validation\nProject-wide validation is the main agent's job, run once after all subagents land. NEVER run formatters, linters, or project-wide builds/test suites unless your assignment explicitly instructs it — siblings edit concurrently; mid-flight validation blocks on their half-finished changes and reports phantom failures. Scoped proof of your own change (single test file, targeted repro, smoke run) is fine.\n# Peers\nYou can reach other live agents via the `hub` tool. Your id is `SymbolCache302`. Currently visible peers:\n- `StackPerformance302` — task (sub, running)\n- `Main` — main (main, running)\n29 parked peer(s) omitted.\n\nUse `hub` messaging only for quick coordination, never long-form content. Address peers by id or use `\"all\"` to broadcast.\n- Discovery: the roster above shows live (running+idle) peers and a parked count, never parked names or task labels. `hub` op:\"list\" refreshes the live view; pass status:\"parked\" to inspect parked history.\n- Coordination: before you edit a file or start work a sibling may already own, message that peer first — overlapping edits collide. Idle peers are not gone: messaging them wakes them.\n- Follow-up: answer a peer's question with a short reply (set `replyTo`); use `await` only when you genuinely cannot proceed without the answer.\n- Parked history: omitted from this roster. `hub` op:\"list\" status:\"parked\" lists ids; `send` to a known parked id revives it. `history://<id>` and `agent://<id>` stay readable.\n\n§ Completion\nNo TODO tracking, no progress updates. Execute; report results with `yield`.\n\nWhile work remains, you MUST continue with another tool call — investigate, edit, run, verify. Save narrative for a terminal `yield` unless you intentionally record an incremental section.\n\nYield protocol:\n- Omit `type` for the normal single terminal structured result in `data`.\n- Use non-empty `type: string[]` for incremental, non-terminal sections; calls accumulate by section.\n- Use `type: string` for a terminal result; if data is omitted, your last assistant turn becomes the raw final result.\n\nThis is your only way to return a final result. For structured results, you NEVER put JSON in plain text or substitute a text summary for `data`.\nGiving up is a last resort. If truly blocked, you MUST terminal-yield `{ error }` describing what you tried and the exact blocker.\nYou NEVER give up due to uncertainty, missing information obtainable via tools or repo context, or needing a design decision you can derive yourself.\n\nYou MUST keep going until this ticket is closed. This matters.\n\nPROJECT\n\n<workstation>\n- OS: win32 10.0.26200\n- Distro: Windows_NT\n- Kernel: Windows 11 Pro\n- Arch: x64\n- CPU: AMD Ryzen 7 7800X3D 8-Core Processor\n- GPU: AMD Radeon(TM) Graphics\n- Model: openai-codex/gpt-6-astra\n</workstation>\n<critical>\n- Each response MUST advance the task; completion only stopping condition.\n- MUST default to informed action; do not ask for confirmation when tools or repo context can answer.\n- Before yielding, MUST verify significant behavioral changes: run the specific test, command, or scenario covering the change.\n</critical>","task":"Complete assignment thoroughly:\n\n# Target\nOwn only new local evidence/tooling files under .spt/preserved/302/symbols/ (not tracked source). No backend/manifest/driver edits.\n# Change\nInvestigate actual Windows system modules needed by first forced capture (ntdll, KernelBase, kernel32 likely; establish from exact DLL files and PCs/module data, not guess). Build and execute a finite preparation script that reads PE CodeView records, obtains matching PDB files from Microsoft's official symbol server into this dedicated cache, validates requested GUID+age against retrieved PDB identity, and records DLL/PDB hashes and download URLs. Read primary documentation as needed. This is file preparation, NOT running diagnostic captures or validation. Coordinate cache layout with StackPerformance302; propose explicit local-only search path env to Main, never automatic network fetching from diagnostic thread. Do not enumerate credentials or alter resident config.\n# Acceptance\nReturn cache path, exact identities, hashes, preparation receipt, backend integration requirement. Keep network failures honest; no fabricated symbol fallback. 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{"type":"message","id":"edd22e59","parentId":"141e4681","timestamp":"2026-09-16T07:30:16.328Z","message":{"role":"user","content":[{"type":"text","text":"Complete assignment thoroughly:\n\n# Target\nOwn only new local evidence/tooling files under .spt/preserved/302/symbols/ (not tracked source). No backend/manifest/driver edits.\n# Change\nInvestigate actual Windows system modules needed by first forced capture (ntdll, KernelBase, kernel32 likely; establish from exact DLL files and PCs/module data, not guess). Build and execute a finite preparation script that reads PE CodeView records, obtains matching PDB files from Microsoft's official symbol server into this dedicated cache, validates requested GUID+age against retrieved PDB identity, and records DLL/PDB hashes and download URLs. Read primary documentation as needed. This is file preparation, NOT running diagnostic captures or validation. Coordinate cache layout with StackPerformance302; propose explicit local-only search path env to Main, never automatic network fetching from diagnostic thread. Do not enumerate credentials or alter resident config.\n# Acceptance\nReturn cache path, exact identities, hashes, preparation receipt, backend integration requirement. Keep network failures honest; no fabricated symbol fallback. Skip all project builds/tests/linters/formatters and instrumented runtime execution."}],"attribution":"agent","timestamp":1789543815497}}
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{"type":"message","id":"41917ca3","parentId":"a767d06a","timestamp":"2026-09-16T07:30:51.885Z","message":{"role":"toolResult","toolCallId":"call_xtD6M5RdTFrHVYBhGJQYcf6H|fc_092438c1974c5cc3016aaa45ab732487d19c770d5ae4ccdd0c","toolName":"read","content":[{"type":"text","text":"URL: https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv\nContent-Type: text/markdown\nMethod: content-negotiation\nNotes: Content negotiation returned text/markdown\n\n---\n\n---\nlayout: Conceptual\ntitle: Using SymSrv - Win32 apps | Microsoft Learn\ncanonicalUrl: https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv\nbreadcrumb_path: /windows/desktop/breadcrumb/toc.json\nuhfHeaderId: MSDocsHeader-WinDevCenter\nrecommendations: true\nadobe-target: true\nms.service: windows-api-desktop-tech\nms.subservice: diagnostics\nms.author: jken\nauthor: GrantMeStrength\nfeedback_system: Standard\nfeedback_product_url: https://www.microsoft.com/en-us/windowsinsider/feedbackhub/fb\nfeedback_help_link_url: https://learn.microsoft.com/answers/tags/224/windows-api-win32/\nfeedback_help_link_type: get-help-at-qna\ndescription: Using SymSrv\nms.assetid: d400f222-c50c-4c7b-8f8a-0c3ed3bba3b9\nms.topic: concept-article\nms.date: 2025-07-14T00:00:00.0000000Z\nlocale: en-us\ndocument_id: 4e6e7faf-ba28-ac08-67c2-12bc3f05625a\ndocument_version_independent_id: 8457dc02-c119-7466-61eb-feb5fc4a29f2\nupdated_at: 2025-07-16T05:03:00.0000000Z\noriginal_content_git_url: https://github.com/MicrosoftDocs/win32-pr/blob/live/desktop-src/Debug/using-symsrv.md\ngitcommit: https://github.com/MicrosoftDocs/win32-pr/blob/3aee48ac3f48e187d17bdfd56951741737331749/desktop-src/Debug/using-symsrv.md\ngit_commit_id: 3aee48ac3f48e187d17bdfd56951741737331749\nsite_name: Docs\ndepot_name: MSDN.win32\npage_type: conceptual\ntoc_rel: toc.json\npdf_url_template: https://learn.microsoft.com/pdfstore/en-us/MSDN.win32/{branchName}{pdfName}\nword_count: 1842\nasset_id: debug/using-symsrv\nmoniker_range_name: \nmonikers: []\nitem_type: Content\nsource_path: desktop-src/Debug/using-symsrv.md\ncmProducts:\n- https://authoring-docs-microsoft.poolparty.biz/devrel/bcbcbad5-4208-4783-8035-8481272c98b8\n- https://authoring-docs-microsoft.poolparty.biz/devrel/caec7b7f-4941-4578-b79f-c63b1c1f5af4\nspProducts:\n- https://authoring-docs-microsoft.poolparty.biz/devrel/43b2e5aa-8a6d-4de2-a252-692232e5edc8\n- https://authoring-docs-microsoft.poolparty.biz/devrel/754dea88-f800-4835-b6b5-280cb5d81e88\nplatformId: a3ed246d-a055-c230-172f-01d055b09dca\n---\n\n# Using SymSrv - Win32 apps | Microsoft Learn\n\nSymSrv delivers symbol files from centralized symbol stores. These stores can contain any number of symbol files, corresponding to any number of programs or operating systems. The stores can also contain binary files, which are particularly useful when debugging minidump files.\n\nThe stores can contain the actual symbol and binary files or simply pointers to symbol files. If the store contains pointers, SymSrv will retrieve the actual files directly from their sources.\n\nSymSrv can also separate a large symbol store into a smaller subset that is appropriate for a specialized debugging task.\n\nFinally, SymSrv can obtain symbol files from an HTTP or HTTPS source using the logon information provided by the operating system. SymSrv supports HTTPS sites protected by smartcards, certificates, and regular logins and passwords.\n\n## Setting the Symbol Path\n\nAs described in [Symbol Paths](symbol-paths), the symbol path (\\_NT\\_SYMBOL\\_PATH environment variable) can be made up of several path elements separated by semicolons. If any one or more of these path elements begins with the text \"srv\\*\", then the element is a symbol server and will use SymSrv to locate symbol files.\n\nNote\n\nIf the \"srv\\*\" text is not specified but the actual path element is a symbol server store, then the symbol handler will act as if \"srv\\*\" were specified. The symbol handler makes this determination by searching for the existence of a file called \"pingme.txt\" in the root directory of the specified path.\n\nJust as symbol paths are made up of symbol path elements separated by semicolons, symbol servers are made up of symbol store elements separated by asterisks. There can be up to 10 symbol stores after the \"srv\\*\" prefix. Stores listed to the left of the list are called *downstream* stores and stores to the right are called *upstream* stores.\n\n srv\\\\*\\*SymbolStore\\* srv\\\\*\\*SymbolStore1\\*\\\\*\\*SymbolStoreN\\* \n\nIf only one symbol store element is included in the path, then SymSrv will attempt to use the any requested file directly from that store.\n\nIf there are two symbol stores in the path, SymSrv looks for the symbol file in the leftmost symbol store. If the file is there, it is used. If it is not there, SymSrv looks in the symbol store immediately to the right. If the file is there, it is copied to the left store and opened from there.\n\nIf there are more than two stores, this behavior continues to the right until the file is found or there are no more stores in the list.\n\nThe file is never opened from any store but the leftmost store. If the file is found anywhere else in the chain, it is copied to every store to the left of it. This copy process is called \"cascading\" and provides certain benefits that will clarfied later in this document.\n\n## Types of Symbol Stores\n\nThe following table displays examples of the supported symbol store types.\n\n| Symbol store type | Description |\n| --- | --- |\n| \\\\server\\share | A fully qualified UNC path to a share on a remote server. |\n| c:\\LocalCache | A path to a directory on the client computer. |\n| https://InternetSite | The URL to a web site hosting the symbols. Must be the rightmost store in the list and should not be the only store in the list. |\n| https://SecureInternetSite | The URL to a secure web site hosting the symbols. This can support passwords, Windows login credentials, certificates, and smartcards. Must be the rightmost store in the list and should not be the only store in the list. |\n| &lt;blank&gt; | If there is no text between two asterisks, this indicates the *default downstream store*. The location is set by calling [**SymSetHomeDirectory**](/en-us/windows/desktop/api/Dbghelp/nf-dbghelp-symsethomedirectory). The default value is a directory named \"sym\" immediately below the program directory of the calling application. This is sometimes referred to as the *default local cache*. |\n\nBecause an HTTP-based symbol store cannot be written to, it must be the rightmost store in the list. If an HTTP-based symbol store was located in the middle or the left of the store list, it would not be possible to copy any found files to it and the chain would be broken. Furthermore, because the symbol handler cannot open a file from a web site, an HTTP-based store should not be the leftmost or only store on the list. If SymSrv is ever presented with this symbol path, it will attempt to recover by copying the file to the default downstream store and open it from there, regardless of whether the default downstream store is indicated in the symbol path or not.\n\n## Examples\n\nTo use SymSrv with a symbol store on \\\\mybuilds\\mysymbols, set the following symbol path:\n\n**set \\_NT\\_SYMBOL\\_PATH= srv\\*\\\\mybuilds\\mysymbols**\n\nTo set the symbol path so that the debugger will copy symbol files from a symbol store on \\\\mybuilds\\mysymbols to your local directory c:\\localsymbols, use:\n\n**set \\_NT\\_SYMBOL\\_PATH=srv\\*c:\\localsymbols\\*\\\\mybuilds\\mysymbols**\n\nTo set the symbol path so that the debugger will copy symbol files from a symbol store on \\\\mybuilds\\mysymbols to the default downstream store (typically c:\\debuggers\\sym), use:\n\n**set \\_NT\\_SYMBOL\\_PATH=srv\\*\\*\\\\mybuilds\\mysymbols**\n\nTo use a cascading store, set the following symbol path:\n\n**set \\_NT\\_SYMBOL\\_PATH = srv\\*c:\\localsymbols\\*\\\\NearbyServer\\store\\*https://DistantServer**\n\nIn this example, SymSrv first looks for the file in c:\\localsymbols. If it is found there, it will return a path to the file. Otherwise, SymSrv looks for the file in \\\\NearbyServer\\store. If it is found there, SymSrv copies the file to c:\\localsymbols and returns a path to the file; if it is not found, SymSrv looks for the file in https://DistantServer, and if it is found there, SymSrv copies the file to \\\\NearbyServer\\store, then to c:\\localsymbols.\n\nThis last example shows how judicious design of a symbol path can be used to optimize the downloading of symbols. If you have a work site with a group of debuggers and they all need to get symbols from a distant location, you can set up a common server with a symbol store near all the debuggers. Then setup every debugger with the symbol path above. The first debugger that requires a certain version of foo.pdb will download it from https://DistantServer to \\\\NearbyServer\\store and then to its own machine in c:\\localsymbols. The next debugger that requires the same file will be able to download it from \\\\NearbyServer\\store because it was already downloaded to that location by the previous debugger. This multi-level caching saves significant time and network bandwidth.\n\n## Microsoft Symbol Store\n\nMicrosoft provides access to an Internet symbol server that contains symbol files for the many versions of the Windows operating system. This catalog of symbols is not guaranteed to be complete, but it is extensive. Other Microsoft products are also represented.\n\nThe Internet symbol server is populated with a variety of Windows symbols for Microsoft Windows operating systems, including hot fixes, Service Packs, Security Rollup Packages, and retail releases. Symbols are also available on the server for current Betas and Release Candidates for Windows products, plus a variety of other Microsoft products, such as Microsoft Internet Explorer.\n\nIf you have access to the Internet during debugging, you can configure the debugger to download symbols as needed during a debugging session, rather than downloading symbol files separately before a debugging session. The symbols are downloaded to a directory location that you specify and then the debugger loads them from there.\n\nThe URL for the Microsoft symbol store is https://msdl.microsoft.com/download/symbols. The following example shows how to set the debugger symbol path (substitute your downstream store path for *c:\\DownstreamStore*):\n\n```syntax\nsrv*c:\\DownstreamStore*https://msdl.microsoft.com/download/symbols\n```\n\n## Compressed Files\n\nSymSrv is compatible with symbol stores that contain compressed files, as long as this compression has been preformed with the compress.exe tool that was distributed with the Windows Server 2003 Resource Kit. Compressed files should have an underscore as the last character in their file extensions (for example, module1.pd\\_ or module2.db\\_). For details, see [Using SymStore](using-symstore).\n\nWhen cascading, files are not uncompressed unless the target store is the leftmost store in the path. If there is only one store in the path and it contains a compressed file, SymSrv will copy the file to the default downstream store and open it from there, even though the default downstream store is not indicated in they symbol path.\n\n**DbgHelp 6.1 and earlier.:** If the files in the master store are compressed, you must use a downstream store. SymSrv will uncompress all files before copying them to the downstream store.\n\n## Deleting the Cache\n\nIf you are using a downstream store as a cache, you can delete this directory at any time to save disk space.\n\nIt is possible to have a vast symbol store that includes symbol files for many different programs or Windows versions. If you upgrade the version of Windows used on your target computer, the cached symbol files will all match the earlier version. These cached files will not be of any further use, and therefore this might be a good time to delete the cache.\n\nDebugging Tools for Windows comes with a utility called agestore.exe that will selectively remove files from a directory tree, leaving the most recently used files. This tool is designed for pruning out unused files from symbol server stores. It allows you to control many options including cut off date and directory size algorithms.\n\n## Flat Cache Directory\n\nIt is possible to declare the default downstream store as a flat directory, rather than a standard symbol tree structure. To do so, call the [**SymSetOptions**](/en-us/windows/desktop/api/Dbghelp/nf-dbghelp-symsetoptions) function with **SYMOPT\\_FLAT\\_DIRECTORY** (this also sets the **SSRVOPT\\_FLAT\\_DEFAULT\\_STORE** option in SymSrv). Be sure to call [**SymSetHomeDirectory**](/en-us/windows/desktop/api/Dbghelp/nf-dbghelp-symsethomedirectory) before doing so; otherwise, the symbol files can be written to the program directory.\n\n## Pointer Files\n\nSymStore can create and use files that point to a target file rather than the target file itself. If a symbol store contains such a pointer file, the default is to copy the file from the location indicated in the pointer file to the store. To configure a store such that the pointer file is copied instead of the file it points to, create a file named wantsptr.txt in the root of the target store. The contents of wantsptr.txt are not important, only the presence of the file.\n\n## Excluding Files from Symbols List\n\nTo exclude files from a symbols search, you can specify their names in symsrv.ini or in the registry. To specify the files in symsrv.ini, create a section named Exclusions and list the files. The file names can contain wildcards, as shown in the following example:\n\n```syntax\n[Exclusions]\ndbghelp.pdb\nsymsrv.*\nmso*\n```\n\nSymsrv.ini should be located in the same directory that symsrv.dll resides. In most installations, the file does not exist and you will need to create a new one.\n\nAlternatively, you can store the files to be excluded in the registry. Create the following registry key: **HKEY\\_LOCAL\\_MACHINE\\Software\\Microsoft\\Symbol Server\\Exclusions**. Store each file name as a string value (REG\\_SZ) within this key. The name of the string value specifies the name of the file to be excluded. You can use the contents of the string value to store a comment describing why the file is being excluded.\n\n## Installation\n\nThe SymSrv (symsrv.dll) symbol server is included in the Debugging Tools for Windows package. It must be installed in the same directory as the copy of dbghelp.dll that you are loading. For more details, see [Calling the DbgHelp Library](calling-the-dbghelp-library)."}],"details":{"kind":"url","url":"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv","finalUrl":"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv","contentType":"text/markdown","method":"content-negotiation","truncated":false,"notes":["Content negotiation returned text/markdown"],"meta":{"source":{"type":"url","value":"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv"}}},"isError":false,"timestamp":1789543851885}}
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\"raw_registers\": {\n      \"rip\": \"0x00007ff8bd3a00e4\",\n      \"rsp\": \"0x000000c5f4ffd988\",\n      \"rbp\": \"0x000000c5f4ffda70\"\n    },\n    \"progress_counter\": null,\n    \"error\": \"SymFromAddr(0x7ff8bd3a00e4): Win32 487; SymFromAddr(0x7ff8ba5ac11f): Win32 487; SymFromAddr(0x7ff8bbb3e957): Win32 487; SymFromAddr(0x7ff8bd2ead6c): Win32 487\",\n    \"suspend_duration_us\": 44,\n    \"resume_confirmed\": true,\n    \"previous_suspend_count\": 0,\n    \"copied_stack_bytes\": 9848\n  },\n  {\n    \"tid\": 36468,\n    \"activity\": \"unknown\",\n    \"op_id\": null,\n    \"raw_pcs\": [\n      \"0x00007ff8bd3a00e4\",\n      \"0x00007ff8ba5ac11f\",\n      \"0x00007ff7d0be0eba\",\n      \"0x00007ff7cf43bfa4\",\n      \"0x00007ff7cf45007e\",\n      \"0x00007ff7cf44e252\",\n      \"0x00007ff7cf45c38c\",\n      \"0x00007ff7cf4ca021\",\n      \"0x00007ff7cf4b0520\",\n      \"0x00007ff7cf4ba2c3\",\n      \"0x00007ff7cf4b9536\",\n      \"0x00007ff7cf45a8a9\",\n      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{"type":"message","id":"9ab7001a","parentId":"8df4a25f","timestamp":"2026-09-16T07:31:28.478Z","message":{"role":"toolResult","toolCallId":"call_AaDPolPHm7tzN0UJQqiuAiYH|fc_092438c1974c5cc3016aaa45cfe68087d1a5cc0cab836fee8e","toolName":"read","content":[{"type":"text","text":"URL: https://llvm.org/docs/PDB/PdbStream.html\nContent-Type: text/html\nMethod: native\n\n---\n\n---\nmeta-color-scheme: light dark\nmeta-viewport: width=device-width, initial-scale=1\ntitle: The PDB Info Stream (aka the PDB Stream) - LLVM\n---\nHide navigation sidebar\n\nHide table of contents sidebar\n\nToggle site navigation sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctbWVudSIgLz48L3N2Zz4=)*\n\n[LLVM](../index.html)\n\nToggle Light / Dark / Auto color theme\n\n![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWF1dG8iPjx1c2UgaHJlZj0iI3N2Zy1zdW4taGFsZiIgLz48L3N2Zz4=)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWRhcmsiPjx1c2UgaHJlZj0iI3N2Zy1tb29uIiAvPjwvc3ZnPg==)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWxpZ2h0Ij48dXNlIGhyZWY9IiNzdmctc3VuIiAvPjwvc3ZnPg==)\n\nToggle table of contents sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctdG9jIiAvPjwvc3ZnPg==)*\n\n[![SVG Image](data:image/svg+xml;base64,PHN2ZyB2aWV3Qm94PSIwIDAgMjQgMjQiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+CiAgICAgICAgICAgIDxwYXRoIGQ9Ik0xMyAyMGgtMlY4bC01LjUgNS41LTEuNDItMS40MkwxMiA0LjE2bDcuOTIgNy45Mi0xLjQyIDEuNDJMMTMgOHYxMnoiIC8+CiAgICAgICAgICA8L3N2Zz4=) Back to top](#)\n\n[![SVG Image](data:image/svg+xml;base64,PHN2ZyBhcmlhLWhpZGRlbj0idHJ1ZSIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS1saW5lY2FwPSJyb3VuZCIgc3Ryb2tlLWxpbmVqb2luPSJyb3VuZCIgc3Ryb2tlLXdpZHRoPSIxLjUiIHZpZXdCb3g9IjAgMCAyNCAyNCI+CiAgICAgIDxwYXRoIGQ9Ik0wIDBoMjR2MjRIMHoiIGZpbGw9Im5vbmUiIHN0cm9rZT0ibm9uZSIgLz4KICAgICAgPHBhdGggZD0iTTQgMjBoNGwxMC41IC0xMC41YTEuNSAxLjUgMCAwIDAgLTQgLTRsLTEwLjUgMTAuNXY0IiAvPgogICAgICA8bGluZSB4MT0iMTMuNSIgeDI9IjE3LjUiIHkxPSI2LjUiIHkyPSIxMC41IiAvPgogICAgPC9zdmc+) Edit this page](https://github.com/llvm/llvm-project/edit/main/llvm/docs/PDB/PdbStream.md \"Edit this page\")\n\nToggle Light / Dark / Auto color theme\n\n![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWF1dG8iPjx1c2UgaHJlZj0iI3N2Zy1zdW4taGFsZiIgLz48L3N2Zz4=)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWRhcmsiPjx1c2UgaHJlZj0iI3N2Zy1tb29uIiAvPjwvc3ZnPg==)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWxpZ2h0Ij48dXNlIGhyZWY9IiNzdmctc3VuIiAvPjwvc3ZnPg==)\n\nToggle table of contents sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctdG9jIiAvPjwvc3ZnPg==)*\n\n# The PDB Info Stream (aka the PDB Stream)[#](#the-pdb-info-stream-aka-the-pdb-stream \"Link to this heading\")\n\n## Stream Header[#](#stream-header \"Link to this heading\")\n\nAt offset 0 of the PDB Stream is a header with the following layout:\n\n```\nstruct PdbStreamHeader {\n  ulittle32_t Version;\n  ulittle32_t Signature;\n  ulittle32_t Age;\n  Guid UniqueId;\n};\n```\n\n- **Version** - A Value from the following enum:\n\n```\nenum class PdbStreamVersion : uint32_t {\n  VC2 = 19941610,\n  VC4 = 19950623,\n  VC41 = 19950814,\n  VC50 = 19960307,\n  VC98 = 19970604,\n  VC70Dep = 19990604,\n  VC70 = 20000404,\n  VC80 = 20030901,\n  VC110 = 20091201,\n  VC140 = 20140508,\n};\n```\n\nWhile the meaning of this field appears to be obvious, in practice we have\nnever observed a value other than `VC70`, even with modern versions of\nthe toolchain, and it is unclear why the other values exist. It is assumed\nthat certain aspects of the PDB stream’s layout, and perhaps even that of\nthe other streams, will change if the value is something other than `VC70`.\n\n- **Signature** - A 32-bit time-stamp generated with a call to `time()` at\nthe time the PDB file is written. Note that due to the inherent uniqueness\nproblems of using a timestamp with 1-second granularity, this field does not\nreally serve its intended purpose, and as such is typically ignored in favor\nof the `Guid` field, described below.\n\n- **Age** - The number of times the PDB file has been written. This can be used\nalong with `Guid` to match the PDB to its corresponding executable.\n\n- **Guid** - A 128-bit identifier guaranteed to be unique across space and time.\nIn general, this can be thought of as the result of calling the Win32 API [UuidCreate](https://msdn.microsoft.com/en-us/library/windows/desktop/aa379205(v=vs.85).aspx),\nalthough LLVM cannot rely on that, as it must work on non-Windows platforms.\n\n## Named Stream Map[#](#named-stream-map \"Link to this heading\")\n\nFollowing the header is a serialized hash table whose key type is a string, and\nwhose value type is an integer. The existence of a mapping `X -> Y` means\nthat the stream with the name `X` has stream index `Y` in the underlying MSF\nfile. Note that not all streams are named (for example, the [TPI Stream](TpiStream.html) has a fixed index and as such there is no need to\nlook up its index by name). In practice, there are usually only a small number\nof named streams and these are enumerated in the table of streams in [The PDB File Format](index.html).\nA corollary of this is if a stream does have a name (and as such is in the named\nstream map) then consulting the Named Stream Map is likely to be the only way to\ndiscover the stream’s MSF stream index. Several important streams (such as the\nglobal string table, which is called `/names`) can only be located this way, and\nso it is important to both produce and consume this correctly as tools will not\nfunction correctly without it.\n\nImportant\n\nSome streams are located by fixed indices (e.g TPI Stream has index 2), but\nother streams are located by fixed names (e.g. the string table is called `/names`) and can only be located by consulting the Named Stream Map.\n\nThe on-disk layout of the Named Stream Map consists of 2 components. The first is\na buffer of string data prefixed by a 32-bit length. The second is a serialized\nhash table whose key and value types are both `uint32_t`. The key is the offset\nof a null-terminated string in the string data buffer specifying the name of the\nstream, and the value is the MSF stream index of the stream with said name.\nNote that although the key is an integer, the hash function used to find the right\nbucket hashes the string at the corresponding offset in the string data buffer.\n\nThe on-disk layout of the serialized hash table is described at [The PDB Serialized Hash Table Format](HashTable.html).\n\nNote that the entire Named Stream Map is not length-prefixed, so the only way to\nget to the data following it is to de-serialize it in its entirety.\n\n## PDB Feature Codes[#](#pdb-feature-codes \"Link to this heading\")\n\nFollowing the Named Stream Map, and consuming all remaining bytes of the PDB\nStream is a list of values from the following enumeration:\n\n```\nenum class PdbRaw_FeatureSig : uint32_t {\n  VC110 = 20091201,\n  VC140 = 20140508,\n  NoTypeMerge = 0x4D544F4E,\n  MinimalDebugInfo = 0x494E494D,\n};\n```\n\nThe meaning of these values is summarized by the following table:\n\n| Flag             | Meaning                                                                                                                        |\n| ---------------- | ------------------------------------------------------------------------------------------------------------------------------ |\n| VC110            | No other features flags are present PDB contains an [IPI Stream](TpiStream.html)                                               |\n| VC140            | Other feature flags may be present PDB contains an [IPI Stream](TpiStream.html)                                                |\n| NoTypeMerge      | Presumably duplicate types can appear in the TPI Stream, although it’s unclear why this might happen.                          |\n| MinimalDebugInfo | Program was linked with /DEBUG:FASTLINK There is no TPI / IPI stream, all type info is contained in the original object files. |\n\n## Matching a PDB to its executable[#](#matching-a-pdb-to-its-executable \"Link to this heading\")\n\nThe linker is responsible for writing both the PDB and the final executable, and\nas a result is the only entity capable of writing the information necessary to\nmatch the PDB to the executable.\n\nIn order to accomplish this, the linker generates a guid for the PDB (or\nre-uses the existing guid if it is linking incrementally) and increments the Age\nfield.\n\nThe executable is a PE/COFF file, and part of a PE/COFF file is the presence of\nnumber of “directories”. For our purposes here, we are interested in the “debug\ndirectory”. The exact format of a debug directory is described by the [IMAGE_DEBUG_DIRECTORY structure](https://msdn.microsoft.com/en-us/library/windows/desktop/ms680307(v=vs.85).aspx).\nFor this particular case, the linker emits a debug directory of type `IMAGE_DEBUG_TYPE_CODEVIEW`. The format of this record is defined in `llvm/include/llvm/Object/CVDebugRecord.h`, but it suffices to say here only\nthat it includes the same `Guid` and `Age` fields. At runtime, a\ndebugger or tool can scan the COFF executable image for the presence of\na debug directory of the correct type and verify that the Guid and Age match."}],"details":{"kind":"url","url":"https://llvm.org/docs/PDB/PdbStream.html","finalUrl":"https://llvm.org/docs/PDB/PdbStream.html","contentType":"text/html","method":"native","truncated":false,"notes":[],"meta":{"source":{"type":"url","value":"https://llvm.org/docs/PDB/PdbStream.html"}}},"isError":false,"timestamp":1789543888478}}
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These files are referred to as Portable Executable (PE) and Common Object File Format (COFF) files, respectively.\nms.assetid: 3dbfbf7f-6662-45a4-99f1-e0e24c370dee\nms.topic: reference\nms.date: 2026-09-10T00:00:00.0000000Z\nlocale: en-us\ndocument_id: d81b46aa-294e-f328-db41-20dda9880ee1\ndocument_version_independent_id: 969e63ab-bbab-ef87-4f96-016e9247f39b\nupdated_at: 2026-09-10T15:41:00.0000000Z\noriginal_content_git_url: https://github.com/MicrosoftDocs/win32-pr/blob/live/desktop-src/Debug/pe-format.md\ngitcommit: https://github.com/MicrosoftDocs/win32-pr/blob/55e845e9f3a6a3261f59a2f460f61edc25ffcdd5/desktop-src/Debug/pe-format.md\ngit_commit_id: 55e845e9f3a6a3261f59a2f460f61edc25ffcdd5\nsite_name: Docs\ndepot_name: MSDN.win32\npage_type: conceptual\ntoc_rel: toc.json\npdf_url_template: https://learn.microsoft.com/pdfstore/en-us/MSDN.win32/{branchName}{pdfName}\nword_count: 26032\nasset_id: debug/pe-format\nmoniker_range_name: \nmonikers: []\nitem_type: Content\nsource_path: desktop-src/Debug/pe-format.md\ncmProducts:\n- https://authoring-docs-microsoft.poolparty.biz/devrel/540ac133-a371-4dbb-8f94-28d6cc77a70b\n- https://authoring-docs-microsoft.poolparty.biz/devrel/bcbcbad5-4208-4783-8035-8481272c98b8\nspProducts:\n- https://authoring-docs-microsoft.poolparty.biz/devrel/60bfc045-f127-4841-9d00-ea35495a5800\n- https://authoring-docs-microsoft.poolparty.biz/devrel/43b2e5aa-8a6d-4de2-a252-692232e5edc8\nplatformId: 0806491a-d211-6de5-dfae-5095329d3dda\n---\n\n# PE Format - Win32 apps | Microsoft Learn\n\nThis specification describes the structure of executable (image) files and object files under the Windows family of operating systems. These files are referred to as Portable Executable (PE) and Common Object File Format (COFF) files, respectively.\n\nNote\n\nThis document is provided to aid in the development of tools and applications for Windows but is not guaranteed to be a complete specification in all respects. Microsoft reserves the right to alter this document without notice.\n\nThis revision of the Microsoft Portable Executable and Common Object File Format Specification replaces all previous revisions of this specification.\n\n## General Concepts\n\nThis document specifies the structure of executable (image) files and object files under the Microsoft Windows family of operating systems. These files are referred to as Portable Executable (PE) and Common Object File Format (COFF) files, respectively. The name \"Portable Executable\" refers to the fact that the format is not architecture specific.\n\nCertain concepts that appear throughout this specification are described in the following table:\n\n| Name | Description |\n| --- | --- |\n| attribute certificate | A certificate that is used to associate verifiable statements with an image. A number of different verifiable statements can be associated with a file; one of the most useful ones is a statement by a software manufacturer that indicates what the message digest of the image is expected to be. A message digest is similar to a checksum except that it is extremely difficult to forge. Therefore, it is very difficult to modify a file to have the same message digest as the original file. The statement can be verified as being made by the manufacturer by using public or private key cryptography schemes. This document describes details about attribute certificates other than to allow for their insertion into image files. |\n| date/time stamp | A stamp that is used for different purposes in several places in a PE or COFF file. In most cases, the format of each stamp is the same as that used by the time functions in the C run-time library. For exceptions, see the descripton of IMAGE\\_DEBUG\\_TYPE\\_REPRO in Debug Type. If the stamp value is 0 or 0xFFFFFFFF, it does not represent a real or meaningful date/time stamp. |\n| file pointer | The location of an item within the file itself, before being processed by the linker (in the case of object files) or the loader (in the case of image files). In other words, this is a position within the file as stored on disk. |\n| linker | A reference to the linker that is provided with Microsoft Visual Studio. |\n| object file | A file that is given as input to the linker. The linker produces an image file, which in turn is used as input by the loader. The term \"object file\" does not necessarily imply any connection to object-oriented programming. |\n| reserved, must be 0 | A description of a field that indicates that the value of the field must be zero for generators and consumers must ignore the field. |\n| Relative virtual address (RVA) | In an image file, this is the address of an item after it is loaded into memory, with the base address of the image file subtracted from it. The RVA of an item almost always differs from its position within the file on disk (file pointer).  In an object file, an RVA is less meaningful because memory locations are not assigned. In this case, an RVA would be an address within a section (described later in this table), to which a relocation is later applied during linking. For simplicity, a compiler should just set the first RVA in each section to zero. |\n| section | The basic unit of code or data within a PE or COFF file. For example, all code in an object file can be combined within a single section or (depending on compiler behavior) each function can occupy its own section. With more sections, there is more file overhead, but the linker is able to link in code more selectively. A section is similar to a segment in Intel 8086 architecture. All the raw data in a section must be loaded contiguously. In addition, an image file can contain a number of sections, such as .tls or .reloc , which have special purposes. |\n| Virtual Address (VA) | Same as RVA, except that the base address of the image file is not subtracted. The address is called a VA because Windows creates a distinct VA space for each process, independent of physical memory. For almost all purposes, a VA should be considered just an address. A VA is not as predictable as an RVA because the loader might not load the image at its preferred location. |\n\n## Overview\n\nThe following list describes the Microsoft PE executable format, with the base of the image header at the top. The section from the MS-DOS 2.0 Compatible EXE Header through to the unused section just before the PE header is the MS-DOS 2.0 Section, and is used for MS-DOS compatibility only.\n\n- MS-DOS 2.0 Compatible EXE Header\n- unused\n- OEM Identifier\n\n    OEM Information\n\n    Offset to PE Header\n- MS-DOS 2.0 Stub Program and Relocation Table\n- unused\n- PE Header (aligned on 8-byte boundary)\n- Section Headers\n- Image Pages:\n\n    import info\n\n    export info\n\n    base relocations\n\n    resource info\n\nThe following list describes the Microsoft COFF object-module format:\n\n- Microsoft COFF Header\n- Section Headers\n- Raw Data:\n\n    code\n\n    data\n\n    debug info\n\n    relocations\n\n## File Headers\n\n- MS-DOS Stub (Image Only)\n- Signature (Image Only)\n- COFF File Header (Object and Image)\n    - Machine Types\n    - Characteristics\n- Optional Header (Image Only)\n    - Optional Header Standard Fields (Image Only)\n    - Optional Header Windows-Specific Fields (Image Only)\n    - Optional Header Data Directories (Image Only)\n\nThe PE file header consists of a Microsoft MS-DOS stub, the PE signature, the COFF file header, and an optional header. A COFF object file header consists of a COFF file header and an optional header. In both cases, the file headers are followed immediately by section headers.\n\n### MS-DOS Stub (Image Only)\n\nThe MS-DOS stub is a valid application that runs under MS-DOS. It is placed at the front of the EXE image. The linker places a default stub here, which prints out the message \"This program cannot be run in DOS mode\" when the image is run in MS-DOS. The user can specify a different stub by using the /STUB linker option.\n\nAt location 0x3c, the stub has the file offset to the PE signature. This information enables Windows to properly execute the image file, even though it has an MS-DOS stub. This file offset is placed at location 0x3c during linking.\n\n### Signature (Image Only)\n\nAfter the MS-DOS stub, at the file offset specified at offset 0x3c, is a 4-byte signature that identifies the file as a PE format image file. This signature is \"PE\\0\\0\" (the letters \"P\" and \"E\" followed by two null bytes).\n\n### COFF File Header (Object and Image)\n\nAt the beginning of an object file, or immediately after the signature of an image file, is a standard COFF file header in the following format. Note that the Windows loader limits the number of sections to 96.\n\n| Offset | Size | Field | Description |\n| --- | --- | --- | --- |\n| 0 | 2 | Machine | The number that identifies the type of target machine. For more information, see Machine Types. |\n| 2 | 2 | NumberOfSections | The number of sections. This indicates the size of the section table, which immediately follows the headers. |\n| 4 | 4 | TimeDateStamp | The low 32 bits of the number of seconds since 00:00 January 1, 1970 (a C run-time time\\_t value), which indicates when the file was created. |\n| 8 | 4 | PointerToSymbolTable | The file offset of the COFF symbol table, or zero if no COFF symbol table is present. This value should be zero for an image because COFF debugging information is deprecated. |\n| 12 | 4 | NumberOfSymbols | The number of entries in the symbol table. This data can be used to locate the string table, which immediately follows the symbol table. This value should be zero for an image because COFF debugging information is deprecated. |\n| 16 | 2 | SizeOfOptionalHeader | The size of the optional header, which is required for executable files but not for object files. This value should be zero for an object file. For a description of the header format, see Optional Header (Image Only). |\n| 18 | 2 | Characteristics | The flags that indicate the attributes of the file. For specific flag values, see Characteristics. |\n\n#### Machine Types\n\nThe Machine field has one of the following values, which specify the CPU type. An image file can be run only on the specified machine or on a system that emulates the specified machine.\n\n| Constant | Value | Description |\n| --- | --- | --- |\n| IMAGE\\_FILE\\_MACHINE\\_UNKNOWN | 0x0 | The content of this field is assumed to be applicable to any machine type |\n| IMAGE\\_FILE\\_MACHINE\\_ALPHA | 0x184 | Alpha AXP, 32-bit address space |\n| IMAGE\\_FILE\\_MACHINE\\_ALPHA64 | 0x284 | Alpha 64, 64-bit address space |\n| IMAGE\\_FILE\\_MACHINE\\_AM33 | 0x1d3 | Matsushita AM33 |\n| IMAGE\\_FILE\\_MACHINE\\_AMD64 | 0x8664 | x64 |\n| IMAGE\\_FILE\\_MACHINE\\_ARM | 0x1c0 | ARM little endian |\n| IMAGE\\_FILE\\_MACHINE\\_ARM64 | 0xaa64 | ARM64 little endian |\n| IMAGE\\_FILE\\_MACHINE\\_ARM64EC | 0xA641 | ABI that enables interoperability between native ARM64 and emulated x64 code. |\n| IMAGE\\_FILE\\_MACHINE\\_ARM64X | 0xA64E | Binary format that allows both native ARM64 and ARM64EC code to coexist in the same file. |\n| IMAGE\\_FILE\\_MACHINE\\_ARMNT | 0x1c4 | ARM Thumb-2 little endian |\n| IMAGE\\_FILE\\_MACHINE\\_AXP64 | 0x284 | AXP 64 (Same as Alpha 64) |\n| IMAGE\\_FILE\\_MACHINE\\_EBC | 0xebc | EFI byte code |\n| IMAGE\\_FILE\\_MACHINE\\_I386 | 0x14c | Intel 386 or later processors and compatible processors |\n| IMAGE\\_FILE\\_MACHINE\\_IA64 | 0x200 | Intel Itanium processor family |\n| IMAGE\\_FILE\\_MACHINE\\_LOONGARCH32 | 0x6232 | LoongArch 32-bit processor family |\n| IMAGE\\_FILE\\_MACHINE\\_LOONGARCH64 | 0x6264 | LoongArch 64-bit processor family |\n| IMAGE\\_FILE\\_MACHINE\\_M32R | 0x9041 | Mitsubishi M32R little endian |\n| IMAGE\\_FILE\\_MACHINE\\_MIPS16 | 0x266 | MIPS16 |\n| IMAGE\\_FILE\\_MACHINE\\_MIPSFPU | 0x366 | MIPS with FPU |\n| IMAGE\\_FILE\\_MACHINE\\_MIPSFPU16 | 0x466 | MIPS16 with FPU |\n| IMAGE\\_FILE\\_MACHINE\\_POWERPC | 0x1f0 | Power PC little endian |\n| IMAGE\\_FILE\\_MACHINE\\_POWERPCFP | 0x1f1 | Power PC with floating point support |\n| IMAGE\\_FILE\\_MACHINE\\_R3000BE | 0x160 | MIPS I compatible 32-bit big endian |\n| IMAGE\\_FILE\\_MACHINE\\_R3000 | 0x162 | MIPS I compatible 32-bit little endian |\n| IMAGE\\_FILE\\_MACHINE\\_R4000 | 0x166 | MIPS III compatible 64-bit little endian |\n| IMAGE\\_FILE\\_MACHINE\\_R10000 | 0x168 | MIPS IV compatible 64-bit little endian |\n| IMAGE\\_FILE\\_MACHINE\\_RISCV32 | 0x5032 | RISC-V 32-bit address space |\n| IMAGE\\_FILE\\_MACHINE\\_RISCV64 | 0x5064 | RISC-V 64-bit address space |\n| IMAGE\\_FILE\\_MACHINE\\_RISCV128 | 0x5128 | RISC-V 128-bit address space |\n| IMAGE\\_FILE\\_MACHINE\\_SH3 | 0x1a2 | Hitachi SH3 |\n| IMAGE\\_FILE\\_MACHINE\\_SH3DSP | 0x1a3 | Hitachi SH3 DSP |\n| IMAGE\\_FILE\\_MACHINE\\_SH4 | 0x1a6 | Hitachi SH4 |\n| IMAGE\\_FILE\\_MACHINE\\_SH5 | 0x1a8 | Hitachi SH5 |\n| IMAGE\\_FILE\\_MACHINE\\_THUMB | 0x1c2 | Thumb |\n| IMAGE\\_FILE\\_MACHINE\\_WCEMIPSV2 | 0x169 | MIPS little-endian WCE v2 |\n\n#### Characteristics\n\nThe Characteristics field contains flags that indicate attributes of the object or image file. The following flags are currently defined:\n\n| Flag | Value | Description |\n| --- | --- | --- |\n| IMAGE\\_FILE\\_RELOCS\\_STRIPPED | 0x0001 | Image only, Windows CE, and Microsoft Windows NT and later. This indicates that the file does not contain base relocations and must therefore be loaded at its preferred base address. If the base address is not available, the loader reports an error. The default behavior of the linker is to strip base relocations from executable (EXE) files. |\n| IMAGE\\_FILE\\_EXECUTABLE\\_IMAGE | 0x0002 | Image only. This indicates that the image file is valid and can be run. If this flag is not set, it indicates a linker error. |\n| IMAGE\\_FILE\\_LINE\\_NUMS\\_STRIPPED | 0x0004 | COFF line numbers have been removed. This flag is deprecated and should be zero. |\n| IMAGE\\_FILE\\_LOCAL\\_SYMS\\_STRIPPED | 0x0008 | COFF symbol table entries for local symbols have been removed. This flag is deprecated and should be zero. |\n| IMAGE\\_FILE\\_AGGRESSIVE\\_WS\\_TRIM | 0x0010 | Obsolete. Aggressively trim working set. This flag is deprecated for Windows 2000 and later and must be zero. |\n| IMAGE\\_FILE\\_LARGE\\_ADDRESS\\_AWARE | 0x0020 | Application can handle &gt; 2-GB addresses. |\n|  | 0x0040 | This flag is reserved for future use. |\n| IMAGE\\_FILE\\_BYTES\\_REVERSED\\_LO | 0x0080 | Little endian: the least significant bit (LSB) precedes the most significant bit (MSB) in memory. This flag is deprecated and should be zero. |\n| IMAGE\\_FILE\\_32BIT\\_MACHINE | 0x0100 | Machine is based on a 32-bit-word architecture. |\n| IMAGE\\_FILE\\_DEBUG\\_STRIPPED | 0x0200 | Debugging information is removed from the image file. |\n| IMAGE\\_FILE\\_REMOVABLE\\_RUN\\_FROM\\_SWAP | 0x0400 | If the image is on removable media, fully load it and copy it to the swap file. |\n| IMAGE\\_FILE\\_NET\\_RUN\\_FROM\\_SWAP | 0x0800 | If the image is on network media, fully load it and copy it to the swap file. |\n| IMAGE\\_FILE\\_SYSTEM | 0x1000 | The image file is a system file, not a user program. |\n| IMAGE\\_FILE\\_DLL | 0x2000 | The image file is a dynamic-link library (DLL). Such files are considered executable files for almost all purposes, although they cannot be directly run. |\n| IMAGE\\_FILE\\_UP\\_SYSTEM\\_ONLY | 0x4000 | The file should be run only on a uniprocessor machine. |\n| IMAGE\\_FILE\\_BYTES\\_REVERSED\\_HI | 0x8000 | Big endian: the MSB precedes the LSB in memory. This flag is deprecated and should be zero. |\n\n### Optional Header (Image Only)\n\nEvery image file has an optional header that provides information to the loader. This header is optional in the sense that some files (specifically, object files) do not have it. For image files, this header is required. An object file can have an optional header, but generally this header has no function in an object file except to increase its size.\n\nNote that the size of the optional header is not fixed. The **SizeOfOptionalHeader** field in the COFF header must be used to validate that a probe into the file for a particular data directory does not go beyond **SizeOfOptionalHeader**. For more information, see COFF File Header (Object and Image).\n\nThe **NumberOfRvaAndSizes** field of the optional header should also be used to ensure that no probe for a particular data directory entry goes beyond the optional header. In addition, it is important to validate the optional header magic number for format compatibility.\n\nThe optional header magic number determines whether an image is a PE32 or PE32+ executable.\n\n| Magic number | PE format |\n| --- | --- |\n| 0x10b | PE32 |\n| 0x20b | PE32+ |\n\nPE32+ images allow for a 64-bit address space while limiting the image size to 2 gigabytes. Other PE32+ modifications are addressed in their respective sections.\n\nThe optional header itself has three major parts.\n\n| Offset (PE32/PE32+) | Size (PE32/PE32+) | Header part | Description |\n| --- | --- | --- | --- |\n| 0 | 28/24 | Standard fields | Fields that are defined for all implementations of COFF, including UNIX. |\n| 28/24 | 68/88 | Windows-specific fields | Additional fields to support specific features of Windows (for example, subsystems). |\n| 96/112 | Variable | Data directories | Address/size pairs for special tables that are found in the image file and are used by the operating system (for example, the import table and the export table). |\n\n#### Optional Header Standard Fields (Image Only)\n\nThe first eight fields of the optional header are standard fields that are defined for every implementation of COFF. These fields contain general information that is useful for loading and running an executable file. They are unchanged for the PE32+ format.\n\n| Offset | Size | Field | Description |\n| --- | --- | --- | --- |\n| 0 | 2 | Magic | The unsigned integer that identifies the state of the image file. The most common number is 0x10B, which identifies it as a normal executable file. 0x107 identifies it as a ROM image, and 0x20B identifies it as a PE32+ executable. |\n| 2 | 1 | MajorLinkerVersion | The linker major version number. |\n| 3 | 1 | MinorLinkerVersion | The linker minor version number. |\n| 4 | 4 | SizeOfCode | The size of the code (text) section, or the sum of all code sections if there are multiple sections. |\n| 8 | 4 | SizeOfInitializedData | The size of the initialized data section, or the sum of all such sections if there are multiple data sections. |\n| 12 | 4 | SizeOfUninitializedData | The size of the uninitialized data section (BSS), or the sum of all such sections if there are multiple BSS sections. |\n| 16 | 4 | AddressOfEntryPoint | The address of the entry point relative to the image base when the executable file is loaded into memory. For program images, this is the starting address. For device drivers, this is the address of the initialization function. An entry point is optional for DLLs. When no entry point is present, this field must be zero. |\n| 20 | 4 | BaseOfCode | The address that is relative to the image base of the beginning-of-code section when it is loaded into memory. |\n\nPE32 contains this additional field, which is absent in PE32+, following BaseOfCode.\n\n| Offset | Size | Field | Description |\n| --- | --- | --- | --- |\n| 24 | 4 | BaseOfData | The address that is relative to the image base of the beginning-of-data section when it is loaded into memory. |\n\n#### Optional Header Windows-Specific Fields (Image Only)\n\nThe next 21 fields are an extension to the COFF optional header format. They contain additional information that is required by the linker and loader in Windows.\n\n| Offset (PE32/ PE32+) | Size (PE32/ PE32+) | Field | Description |\n| --- | --- | --- | --- |\n| 28/24 | 4/8 | ImageBase | The preferred address of the first byte of image when loaded into memory; must be a multiple of 64 K. The default for DLLs is 0x10000000. The default for Windows CE EXEs is 0x00010000. The default for Windows NT, Windows 2000, Windows XP, Windows 95, Windows 98, and Windows Me is 0x00400000. |\n| 32/32 | 4 | SectionAlignment | The alignment (in bytes) of sections when they are loaded into memory. It must be greater than or equal to FileAlignment. The default is the page size for the architecture. |\n| 36/36 | 4 | FileAlignment | The alignment factor (in bytes) that is used to align the raw data of sections in the image file. The value should be a power of 2 between 512 and 64 K, inclusive. The default is 512. If the SectionAlignment is less than the architecture's page size, then FileAlignment must match SectionAlignment. |\n| 40/40 | 2 | MajorOperatingSystemVersion | The major version number of the required operating system. |\n| 42/42 | 2 | MinorOperatingSystemVersion | The minor version number of the required operating system. |\n| 44/44 | 2 | MajorImageVersion | The major version number of the image. |\n| 46/46 | 2 | MinorImageVersion | The minor version number of the image. |\n| 48/48 | 2 | MajorSubsystemVersion | The major version number of the subsystem. |\n| 50/50 | 2 | MinorSubsystemVersion | The minor version number of the subsystem. |\n| 52/52 | 4 | Win32VersionValue | Reserved, must be zero. |\n| 56/56 | 4 | SizeOfImage | The size (in bytes) of the image, including all headers, as the image is loaded in memory. It must be a multiple of SectionAlignment. |\n| 60/60 | 4 | SizeOfHeaders | The combined size of an MS-DOS stub, PE header, and section headers rounded up to a multiple of FileAlignment. |\n| 64/64 | 4 | CheckSum | The image file checksum. The algorithm for computing the checksum is incorporated into IMAGHELP.DLL. The following are checked for validation at load time: all drivers, any DLL loaded at boot time, and any DLL that is loaded into a critical Windows process. |\n| 68/68 | 2 | Subsystem | The subsystem that is required to run this image. For more information, see Windows Subsystem. |\n| 70/70 | 2 | DllCharacteristics | For more information, see DLL Characteristics later in this specification. |\n| 72/72 | 4/8 | SizeOfStackReserve | The size of the stack to reserve. Only SizeOfStackCommit is committed; the rest is made available one page at a time until the reserve size is reached. |\n| 76/80 | 4/8 | SizeOfStackCommit | The size of the stack to commit. |\n| 80/88 | 4/8 | SizeOfHeapReserve | The size of the local heap space to reserve. Only SizeOfHeapCommit is committed; the rest is made available one page at a time until the reserve size is reached. |\n| 84/96 | 4/8 | SizeOfHeapCommit | The size of the local heap space to commit. |\n| 88/104 | 4 | LoaderFlags | Reserved, must be zero. |\n| 92/108 | 4 | NumberOfRvaAndSizes | The number of data-directory entries in the remainder of the optional header. Each describes a location and size. |\n\n##### Windows Subsystem\n\n\n[Showing lines 1-300 of 2044. Use :301 to continue. 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{"type":"message","id":"157672ad","parentId":"8f0ada57","timestamp":"2026-09-16T07:32:29.495Z","message":{"role":"assistant","content":[{"type":"toolCall","id":"call_zf2bkqUBcit7IUeQ2Cm22nto|fc_092438c1974c5cc3016aaa460d5dc887d1b8a766908341375a","name":"hub","arguments":{"i":"Confirming flat cache layout","op":"send","to":"StackPerformance302","message":"Confirmed will stage validated flat/*.pdb (hardlinks when available). Actual recorded missing PCs map to local loaded ntdll (base 0x7ff8bd240000, RVAs aad6c/1600e4), KERNELBASE (0x7ff8ba590000, 1c11f), KERNEL32 (0x7ff8bbb10000, 2e957) via GetModuleHandleEx FROM_ADDRESS in preparation process. Recording mapping method explicitly; no captured module map exists."},"intent":"Confirming flat cache layout"},{"type":"toolCall","id":"call_Q1leyz2B0IBS2dU7OMGQ7NtV|fc_092438c1974c5cc3016aaa460d5ddc87d1b3d905690d93ffee","name":"hub","arguments":{"i":"Proposing local symbol environment","op":"send","to":"Main","message":"Propose SPT_NET_DIAG_SYMBOL_DIR=C:\\Users\\decid\\Documents\\projects\\spt-core\\.spt\\preserved\\302\\symbols\\flat (plain absolute local dir appended to exe-only path; reject srv/network). Preparing identity-validated PDBs now. Exact four missing PCs map via local GetModuleHandleEx to ntdll/KERNELBASE/KERNEL32 at matching current system VA ranges; first capture has no own module map, receipt will explicitly state preparation-process mapping scope."},"intent":"Proposing local symbol environment"},{"type":"toolCall","id":"call_UsNC4hHmkKVQGSgqlytNnw2F|fc_092438c1974c5cc3016aaa460d5de887d19b4fa44dafdb4b1a","name":"read","arguments":{"i":"Reading PDB container layout","path":"https://llvm.org/docs/PDB/MsfFile.html"},"intent":"Reading PDB container layout"}],"api":"openai-codex-responses","provider":"openai-codex","model":"gpt-6-astra","usage":{"input":1126,"output":322,"cacheRead":34816,"cacheWrite":0,"totalTokens":36264,"cost":{"input":0.011260000000000001,"output":0.0161,"cacheRead":0.034816,"cacheWrite":0,"total":0.062176}},"stopReason":"toolUse","timestamp":1789543921017,"responseId":"resp_092438c1974c5cc3016aaa45f1421087d1ba433b4db4d258a5","providerPayload":{"type":"openaiResponsesHistory","provider":"openai-codex","dt":true,"items":[{"id":"fc_092438c1974c5cc3016aaa460d5dc887d1b8a766908341375a","type":"function_call","status":"completed","arguments":"{\"i\":\"Confirming flat cache layout\",\"op\":\"send\",\"to\":\"StackPerformance302\",\"message\":\"Confirmed will stage validated flat/*.pdb (hardlinks when available). Actual recorded missing PCs map to local loaded ntdll (base 0x7ff8bd240000, RVAs aad6c/1600e4), KERNELBASE (0x7ff8ba590000, 1c11f), KERNEL32 (0x7ff8bbb10000, 2e957) via GetModuleHandleEx FROM_ADDRESS in preparation process. Recording mapping method explicitly; no captured module map exists.\"}","call_id":"call_zf2bkqUBcit7IUeQ2Cm22nto","internal_chat_message_metadata_passthrough":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"},"name":"hub","metadata":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"}},{"id":"fc_092438c1974c5cc3016aaa460d5ddc87d1b3d905690d93ffee","type":"function_call","status":"completed","arguments":"{\"i\":\"Proposing local symbol environment\",\"op\":\"send\",\"to\":\"Main\",\"message\":\"Propose SPT_NET_DIAG_SYMBOL_DIR=C:\\\\Users\\\\decid\\\\Documents\\\\projects\\\\spt-core\\\\.spt\\\\preserved\\\\302\\\\symbols\\\\flat (plain absolute local dir appended to exe-only path; reject srv/network). Preparing identity-validated PDBs now. Exact four missing PCs map via local GetModuleHandleEx to ntdll/KERNELBASE/KERNEL32 at matching current system VA ranges; first capture has no own module map, receipt will explicitly state preparation-process mapping scope.\"}","call_id":"call_Q1leyz2B0IBS2dU7OMGQ7NtV","internal_chat_message_metadata_passthrough":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"},"name":"hub","metadata":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"}},{"id":"fc_092438c1974c5cc3016aaa460d5de887d19b4fa44dafdb4b1a","type":"function_call","status":"completed","arguments":"{\"i\":\"Reading PDB container layout\",\"path\":\"https://llvm.org/docs/PDB/MsfFile.html\"}","call_id":"call_UsNC4hHmkKVQGSgqlytNnw2F","internal_chat_message_metadata_passthrough":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"},"name":"read","metadata":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"}}]},"duration":28475.11930000037,"ttft":28373.780200000852,"completedAt":1789543949492,"contextSnapshot":{"promptTokens":35942,"nonMessageTokens":16994,"compactionEpoch":0}}}
{"type":"message","id":"6d0cff9c","parentId":"157672ad","timestamp":"2026-09-16T07:32:29.496Z","message":{"role":"toolResult","toolCallId":"call_zf2bkqUBcit7IUeQ2Cm22nto|fc_092438c1974c5cc3016aaa460d5dc887d1b8a766908341375a","toolName":"hub","content":[{"type":"text","text":"Delivered to 1 peer(s):\n- StackPerformance302: injected"}],"details":{"op":"send","from":"SymbolCache302","to":"StackPerformance302","receipts":[{"to":"StackPerformance302","outcome":"injected"}]},"isError":false,"timestamp":1789543949495}}
{"type":"message","id":"7f5743b1","parentId":"6d0cff9c","timestamp":"2026-09-16T07:32:29.496Z","message":{"role":"toolResult","toolCallId":"call_Q1leyz2B0IBS2dU7OMGQ7NtV|fc_092438c1974c5cc3016aaa460d5ddc87d1b3d905690d93ffee","toolName":"hub","content":[{"type":"text","text":"Delivered to 1 peer(s):\n- Main: injected"}],"details":{"op":"send","from":"SymbolCache302","to":"Main","receipts":[{"to":"Main","outcome":"injected"}]},"isError":false,"timestamp":1789543949496}}
{"type":"message","id":"3bf236c2","parentId":"7f5743b1","timestamp":"2026-09-16T07:32:29.692Z","message":{"role":"toolResult","toolCallId":"call_UsNC4hHmkKVQGSgqlytNnw2F|fc_092438c1974c5cc3016aaa460d5de887d19b4fa44dafdb4b1a","toolName":"read","content":[{"type":"text","text":"URL: https://llvm.org/docs/PDB/MsfFile.html\nContent-Type: text/html\nMethod: native\n\n---\n\n---\nmeta-color-scheme: light dark\nmeta-viewport: width=device-width, initial-scale=1\ntitle: The MSF File Format - LLVM\n---\nHide navigation sidebar\n\nHide table of contents sidebar\n\nToggle site navigation sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctbWVudSIgLz48L3N2Zz4=)*\n\n[LLVM](../index.html)\n\nToggle Light / Dark / Auto color theme\n\n![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWF1dG8iPjx1c2UgaHJlZj0iI3N2Zy1zdW4taGFsZiIgLz48L3N2Zz4=)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWRhcmsiPjx1c2UgaHJlZj0iI3N2Zy1tb29uIiAvPjwvc3ZnPg==)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWxpZ2h0Ij48dXNlIGhyZWY9IiNzdmctc3VuIiAvPjwvc3ZnPg==)\n\nToggle table of contents sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctdG9jIiAvPjwvc3ZnPg==)*\n\n[![SVG Image](data:image/svg+xml;base64,PHN2ZyB2aWV3Qm94PSIwIDAgMjQgMjQiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+CiAgICAgICAgICAgIDxwYXRoIGQ9Ik0xMyAyMGgtMlY4bC01LjUgNS41LTEuNDItMS40MkwxMiA0LjE2bDcuOTIgNy45Mi0xLjQyIDEuNDJMMTMgOHYxMnoiIC8+CiAgICAgICAgICA8L3N2Zz4=) Back to top](#)\n\n[![SVG Image](data:image/svg+xml;base64,PHN2ZyBhcmlhLWhpZGRlbj0idHJ1ZSIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS1saW5lY2FwPSJyb3VuZCIgc3Ryb2tlLWxpbmVqb2luPSJyb3VuZCIgc3Ryb2tlLXdpZHRoPSIxLjUiIHZpZXdCb3g9IjAgMCAyNCAyNCI+CiAgICAgIDxwYXRoIGQ9Ik0wIDBoMjR2MjRIMHoiIGZpbGw9Im5vbmUiIHN0cm9rZT0ibm9uZSIgLz4KICAgICAgPHBhdGggZD0iTTQgMjBoNGwxMC41IC0xMC41YTEuNSAxLjUgMCAwIDAgLTQgLTRsLTEwLjUgMTAuNXY0IiAvPgogICAgICA8bGluZSB4MT0iMTMuNSIgeDI9IjE3LjUiIHkxPSI2LjUiIHkyPSIxMC41IiAvPgogICAgPC9zdmc+) Edit this page](https://github.com/llvm/llvm-project/edit/main/llvm/docs/PDB/MsfFile.md \"Edit this page\")\n\nToggle Light / Dark / Auto color theme\n\n![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWF1dG8iPjx1c2UgaHJlZj0iI3N2Zy1zdW4taGFsZiIgLz48L3N2Zz4=)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWRhcmsiPjx1c2UgaHJlZj0iI3N2Zy1tb29uIiAvPjwvc3ZnPg==)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWxpZ2h0Ij48dXNlIGhyZWY9IiNzdmctc3VuIiAvPjwvc3ZnPg==)\n\nToggle table of contents sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctdG9jIiAvPjwvc3ZnPg==)*\n\n# The MSF File Format[#](#the-msf-file-format \"Link to this heading\")\n\n## File Layout[#](#file-layout \"Link to this heading\")\n\nThe MSF file format consists of the following components:\n\n1. [The Superblock](#msf-superblock)\n\n2. [The Free Block Map](#msf-freeblockmap) (also know as Free Page Map, or FPM)\n\n3. Data\n\nEach component is stored as an indexed block, the length of which is specified\nin `SuperBlock::BlockSize`. The file consists of 1 or more iterations of the\nfollowing pattern (sometimes referred to as an “interval”):\n\n1. 1 block of data\n\n2. Free Block Map 1 (corresponds to `SuperBlock::FreeBlockMapBlock` 1)\n\n3. Free Block Map 2 (corresponds to `SuperBlock::FreeBlockMapBlock` 2)\n\n4. `SuperBlock::BlockSize - 3` blocks of data\n\nIn the first interval, the first data block is used to store [The Superblock](#msf-superblock).\n\nThe following diagram demonstrates the general layout of the file (| denotes\nthe end of an interval, and is for visualization purposes only):\n\n| Block Index | 0                                 | 1                | 2                | 3 - 4095 | \\| | 4096 | 4097 | 4098 | 4099 - 8191 | \\| | … |\n| ----------- | --------------------------------- | ---------------- | ---------------- | -------- | --- | ---- | ---- | ---- | ----------- | --- | --- |\n| Meaning     | [The Superblock](#msf-superblock) | Free Block Map 1 | Free Block Map 2 | Data     | \\| | Data | FPM1 | FPM2 | Data        | \\| | … |\n\nThe file may end after any block, including immediately after a FPM1.\n\nNote\n\nLLVM only supports 4096 byte blocks (sometimes referred to as the “BigMsf”\nvariant), so the rest of this document will assume a block size of 4096.\n\n## The Superblock[#](#the-superblock \"Link to this heading\")\n\nAt file offset 0 in an MSF file is the MSF *SuperBlock*, which is laid out as\nfollows:\n\n```\nstruct SuperBlock {\n  char FileMagic[sizeof(Magic)];\n  ulittle32_t BlockSize;\n  ulittle32_t FreeBlockMapBlock;\n  ulittle32_t NumBlocks;\n  ulittle32_t NumDirectoryBytes;\n  ulittle32_t Unknown;\n  ulittle32_t BlockMapAddr;\n};\n```\n\n- **FileMagic** - Must be equal to `\"Microsoft C/C++ MSF 7.00\\\\r\\\\n\"` followed by the bytes `1A 44 53 00 00 00`.\n\n- **BlockSize** - The block size of the internal file system. Valid values are\n512, 1024, 2048, and 4096 bytes. Certain aspects of the MSF file layout vary\ndepending on the block sizes. For the purposes of LLVM, we handle only block\nsizes of 4KiB, and all further discussion assumes a block size of 4KiB.\n\n- **FreeBlockMapBlock** - The index of a block within the file, at which begins\na bitfield representing the set of all blocks within the file which are “free”\n(i.e. the data within that block is not used). See [The Free Block Map](#msf-freeblockmap) for more information. **Important**: `FreeBlockMapBlock` can only be `1` or `2`!\n\n- **NumBlocks** - The total number of blocks in the file. `NumBlocks * BlockSize` should equal the size of the file on disk.\n\n- **NumDirectoryBytes** - The size of the stream directory, in bytes. The\nstream directory contains information about each stream’s size and the set of\nblocks that it occupies. It will be described in more detail later.\n\n- **BlockMapAddr** - The index of a block within the MSF file. At this block is\nan array of `ulittle32_t`’s listing the blocks that the stream directory\nresides on. For large MSF files, the stream directory (which describes the\nblock layout of each stream) may not fit entirely on a single block. As a\nresult, this extra layer of indirection is introduced, whereby this block\ncontains the list of blocks that the stream directory occupies, and the stream\ndirectory itself can be stitched together accordingly. The number of `ulittle32_t`’s in this array is given by `ceil(NumDirectoryBytes / BlockSize)`.\n\n## The Free Block Map[#](#the-free-block-map \"Link to this heading\")\n\nThe Free Block Map (sometimes referred to as the Free Page Map, or FPM) is a\nseries of blocks which contains a bit flag for every block in the file. The\nflag will be set to 0 if the block is in use, and 1 if the block is unused.\n\nEach file contains two FPMs, one of which is active at any given time. This\nfeature is designed to support incremental and atomic updates of the underlying\nMSF file. While writing to an MSF file, if the active FPM is FPM1, you can\nwrite your new modified bitfield to FPM2, and vice versa. Only when you commit\nthe file to disk do you need to swap the value in the SuperBlock to point to\nthe new `FreeBlockMapBlock`.\n\nThe Free Block Maps are stored as a series of single blocks throughout the file\nat intervals of BlockSize. Because each FPM block is of size `BlockSize` bytes, it contains 8 times as many bits as an interval has blocks. This means\nthat the first block of each FPM refers to the first 8 intervals of the file\n(the first 32768 blocks), the second block of each FPM refers to the next 8\nblocks, and so on. This results in far more FPM blocks being present than are\nrequired, but in order to maintain backwards compatibility the format must stay\nthis way.\n\n## The Stream Directory[#](#the-stream-directory \"Link to this heading\")\n\nThe Stream Directory is the root of all access to the other streams in an MSF\nfile. Beginning at byte 0 of the stream directory is the following structure:\n\n```\nstruct StreamDirectory {\n  ulittle32_t NumStreams;\n  ulittle32_t StreamSizes[NumStreams];\n  ulittle32_t StreamBlocks[NumStreams][];\n};\n```\n\nAnd this structure occupies exactly `SuperBlock->NumDirectoryBytes` bytes.\nNote that each of the last two arrays is of variable length, and in particular\nthat the second array is jagged.\n\n**Example:** Suppose a hypothetical PDB file with a 4KiB block size, and 4\nstreams of lengths {1000 bytes, 8000 bytes, 16000 bytes, 9000 bytes}.\n\nStream 0: ceil(1000 / 4096) = 1 block\n\nStream 1: ceil(8000 / 4096) = 2 blocks\n\nStream 2: ceil(16000 / 4096) = 4 blocks\n\nStream 3: ceil(9000 / 4096) = 3 blocks\n\nIn total, 10 blocks are used. Let’s see what the stream directory might look\nlike:\n\n```\nstruct StreamDirectory {\n  ulittle32_t NumStreams = 4;\n  ulittle32_t StreamSizes[] = {1000, 8000, 16000, 9000};\n  ulittle32_t StreamBlocks[][] = {\n    {4},\n    {5, 6},\n    {11, 9, 7, 8},\n    {10, 15, 12}\n  };\n};\n```\n\nIn total, this occupies `15 * 4 = 60` bytes, so `SuperBlock->NumDirectoryBytes` would equal `60`, and `SuperBlock->BlockMapAddr` would be an array of one `ulittle32_t`, since `60 <= SuperBlock->BlockSize`.\n\nNote also that the streams are discontiguous, and that part of stream 3 is in the\nmiddle of part of stream 2. You cannot assume anything about the layout of the\nblocks!\n\n## Alignment and Block Boundaries[#](#alignment-and-block-boundaries \"Link to this heading\")\n\nAs may be clear by now, it is possible for a single field (whether it be a high\nlevel record, a long string field, or even a single `uint16`) to begin and\nend in separate blocks. For example, if the block size is 4096 bytes, and a `uint16` field begins at the last byte of the current block, then it would\nneed to end on the first byte of the next block. Since blocks are not\nnecessarily contiguously laid out in the file, this means that both the consumer\nand the producer of an MSF file must be prepared to split data apart\naccordingly. In the aforementioned example, the high byte of the `uint16` would be written to the last byte of block N, and the low byte would be written\nto the first byte of block N+1, which could be tens of thousands of bytes later\n(or even earlier!) in the file, depending on what the stream directory says."}],"details":{"kind":"url","url":"https://llvm.org/docs/PDB/MsfFile.html","finalUrl":"https://llvm.org/docs/PDB/MsfFile.html","contentType":"text/html","method":"native","truncated":false,"notes":[],"meta":{"source":{"type":"url","value":"https://llvm.org/docs/PDB/MsfFile.html"}}},"isError":false,"timestamp":1789543949692}}
{"type":"custom","customType":"tool_execution_start","data":{"toolCallId":"call_5Z8jckdczIIXv5PZoU9J4fBK|fc_092438c1974c5cc3016aaa461fbca087d1bb59ccb3c6e954a2","toolName":"write","startedAt":"2026-09-16T07:34:35.580Z","args":{"path":".spt/preserved/302/symbols/prepare_symbols.py"},"intent":"Writing finite symbol preparation"},"id":"aaa33041","parentId":"3bf236c2","timestamp":"2026-09-16T07:34:35.580Z"}
{"type":"message","id":"2e8427c3","parentId":"aaa33041","timestamp":"2026-09-16T07:34:35.581Z","message":{"role":"assistant","content":[{"type":"thinking","thinking":"**Building the validation script**\n\n**Validating PDB identity**"},{"type":"toolCall","id":"call_5Z8jckdczIIXv5PZoU9J4fBK|fc_092438c1974c5cc3016aaa461fbca087d1bb59ccb3c6e954a2","name":"write","arguments":{"i":"Writing finite symbol preparation","path":".spt/preserved/302/symbols/prepare_symbols.py","content":"\"\"\"Prepare exact local PDBs from recorded missing PCs; never launch/attach a target.\"\"\"\nimport ctypes\nimport datetime\nimport hashlib\nimport json\nimport os\nfrom pathlib import Path\nimport struct\nimport time\nimport urllib.request\nimport uuid\n\nROOT = Path(__file__).resolve().parent\nSTACKS = ROOT.parent / \"todlando-windows/forced-1/analysis/stacks.jsonl\"\nSERVER = \"https://msdl.microsoft.com/download/symbols\"\nSOURCES = [\n    \"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv\",\n    \"https://learn.microsoft.com/en-us/windows/win32/debug/pe-format\",\n    \"https://llvm.org/docs/PDB/MsfFile.html\",\n    \"https://llvm.org/docs/PDB/PdbStream.html\",\n]\n\n\ndef sha256(data):\n    return hashlib.sha256(data).hexdigest()\n\n\ndef take(data, offset, size):\n    if offset < 0 or size < 0 or offset + size > len(data):\n        raise ValueError(f\"Out-of-bounds file read: {offset}+{size}/{len(data)}\")\n    return data[offset:offset + size]\n\n\ndef unpack(fmt, data, offset):\n    return struct.unpack(fmt, take(data, offset, struct.calcsize(fmt)))\n\n\ndef pe_identity(data):\n    if take(data, 0, 2) != b\"MZ\":\n        raise ValueError(\"Missing DOS signature\")\n    pe, = unpack(\"<I\", data, 0x3c)\n    if take(data, pe, 4) != b\"PE\\0\\0\":\n        raise ValueError(\"Missing PE signature\")\n    machine, sections, timestamp, _, _, optional_size, _ = unpack(\"<HHIIIHH\", data, pe + 4)\n    optional = pe + 24\n    magic, = unpack(\"<H\", data, optional)\n    if machine != 0x8664 or magic != 0x20b:\n        raise ValueError(\"Expected native x64 PE32+ system DLL\")\n    if optional_size < 112 + 7 * 8 or unpack(\"<I\", data, optional + 108)[0] < 7:\n        raise ValueError(\"Missing debug data directory\")\n    image_size, headers_size = unpack(\"<II\", data, optional + 56)\n    debug_rva, debug_size = unpack(\"<II\", data, optional + 112 + 6 * 8)\n    section_ranges = []\n    for i in range(sections):\n        entry = optional + optional_size + 40 * i\n        virtual_size, rva, raw_size, raw_offset = unpack(\"<IIII\", data, entry + 8)\n        section_ranges.append((rva, raw_size, raw_offset))\n\n    def file_offset(rva):\n        if rva < headers_size:\n            return rva\n        for start, size, offset in section_ranges:\n            if start <= rva < start + size:\n                return offset + rva - start\n        raise ValueError(f\"RVA 0x{rva:x} lacks file-backed section\")\n\n    if not debug_rva or not debug_size or debug_size % 28:\n        raise ValueError(\"Invalid debug directory\")\n    records = []\n    debug_offset = file_offset(debug_rva)\n    for i in range(debug_size // 28):\n        _, _, _, _, kind, size, _, raw = unpack(\"<IIHHIIII\", data, debug_offset + i * 28)\n        if kind != 2:\n            continue\n        codeview = take(data, raw, size)\n        if take(codeview, 0, 4) != b\"RSDS\":\n            raise ValueError(\"CodeView is not RSDS\")\n        guid = uuid.UUID(bytes_le=take(codeview, 4, 16))\n        age, = unpack(\"<I\", codeview, 20)\n        name_data = take(codeview, 24, len(codeview) - 24)\n        if b\"\\0\" not in name_data:\n            raise ValueError(\"Unterminated PDB name\")\n        embedded = name_data.split(b\"\\0\", 1)[0].decode(\"utf-8\")\n        name = embedded.replace(\"\\\\\", \"/\").split(\"/\")[-1]\n        if not name.lower().endswith(\".pdb\") or any(c not in \"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_.-\" for c in name):\n            raise ValueError(\"Unsafe PDB basename\")\n        records.append({\"guid\": str(guid).upper(), \"age\": age, \"key\": guid.hex.upper() + format(age, \"X\"), \"name\": name, \"embedded_path\": embedded})\n    if len(records) != 1:\n        raise ValueError(f\"Expected exactly one CodeView record, found {len(records)}\")\n    return {\"machine\": hex(machine), \"timestamp\": hex(timestamp), \"image_size\": image_size, \"codeview\": records[0]}\n\n\ndef pdb_identity(data):\n    if take(data, 0, 32) != b\"Microsoft C/C++ MSF 7.00\\r\\n\\x1aDS\\0\\0\\0\":\n        raise ValueError(\"Unsupported PDB container (expected MSF 7)\")\n    block_size, _, blocks, directory_size, _, block_map = unpack(\"<6I\", data, 32)\n    if block_size not in (512, 1024, 2048, 4096) or blocks * block_size != len(data):\n        raise ValueError(\"Invalid MSF block geometry\")\n    directory_count = (directory_size + block_size - 1) // block_size\n    if directory_count * 4 > block_size:\n        raise ValueError(\"Unsupported multi-block MSF directory map\")\n    directory_blocks = unpack(f\"<{directory_count}I\", data, block_map * block_size)\n    directory = b\"\".join(take(data, b * block_size, block_size) for b in directory_blocks)[:directory_size]\n    stream_count, = unpack(\"<I\", directory, 0)\n    if stream_count < 2:\n        raise ValueError(\"PDB info stream missing\")\n    sizes = unpack(f\"<{stream_count}I\", directory, 4)\n    cursor = 4 + stream_count * 4\n    for index, size in enumerate(sizes[:2]):\n        if size == 0xffffffff:\n            if index == 1:\n                raise ValueError(\"PDB info stream absent\")\n            continue\n        count = (size + block_size - 1) // block_size\n        stream_blocks = unpack(f\"<{count}I\", directory, cursor)\n        cursor += count * 4\n        if index == 1:\n            info = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n            version, signature, age = unpack(\"<III\", info, 0)\n            guid = uuid.UUID(bytes_le=take(info, 12, 16))\n            return {\"guid\": str(guid).upper(), \"age\": age, \"version\": version, \"signature\": signature}\n    raise ValueError(\"PDB info stream not decoded\")\n\n\ndef map_recorded_pcs(pcs):\n    kernel = ctypes.WinDLL(\"kernel32\", use_last_error=True)\n    kernel.GetModuleHandleExW.argtypes = [ctypes.c_ulong, ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p)]\n    kernel.GetModuleHandleExW.restype = ctypes.c_int\n    kernel.GetModuleFileNameW.argtypes = [ctypes.c_void_p, ctypes.c_wchar_p, ctypes.c_ulong]\n    kernel.GetModuleFileNameW.restype = ctypes.c_ulong\n    modules = {}\n    for pc in sorted(pcs):\n        module = ctypes.c_void_p()\n        # FROM_ADDRESS | UNCHANGED_REFCOUNT; own preparation process only.\n        if not kernel.GetModuleHandleExW(6, pc, ctypes.byref(module)):\n            raise ctypes.WinError(ctypes.get_last_error())\n        path = ctypes.create_unicode_buffer(32768)\n        count = kernel.GetModuleFileNameW(module, path, len(path))\n        if count == 0 or count >= len(path):\n            raise ctypes.WinError(ctypes.get_last_error())\n        dll = Path(path.value).resolve()\n        if dll.parent != (Path(os.environ[\"SystemRoot\"]) / \"System32\").resolve():\n            raise ValueError(f\"Recorded missing PC maps outside System32: {dll}\")\n        key = str(dll).lower()\n        entry = modules.setdefault(key, {\"dll_path\": str(dll), \"preparation_process_base\": hex(module.value), \"recorded_pcs\": []})\n        entry[\"recorded_pcs\"].append({\"pc\": hex(pc), \"rva\": hex(pc - module.value)})\n    return list(modules.values())\n\n\ndef prepare_module(entry):\n    dll_data = Path(entry[\"dll_path\"]).read_bytes()\n    entry.update({\"dll_sha256\": sha256(dll_data), \"dll_size\": len(dll_data), \"pe\": pe_identity(dll_data)})\n    for address in entry[\"recorded_pcs\"]:\n        if not 0 <= int(address[\"rva\"], 16) < entry[\"pe\"][\"image_size\"]:\n            raise ValueError(\"Recorded PC outside PE SizeOfImage\")\n    cv = entry[\"pe\"][\"codeview\"]\n    url = f\"{SERVER}/{cv['name']}/{cv['key']}/{cv['name']}\"\n    target = ROOT / \"cache\" / cv[\"name\"] / cv[\"key\"] / cv[\"name\"]\n    entry.update({\"download_url\": url, \"cache_path\": str(target)})\n    if target.exists():\n        data = target.read_bytes()\n        entry[\"acquisition\"] = \"existing-cache-revalidated\"\n    else:\n        start = time.monotonic()\n        request = urllib.request.Request(url, headers={\"User-Agent\": \"spt-302-local-symbol-preparation\"})\n        with urllib.request.urlopen(request, timeout=30) as response:\n            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl()})\n            chunks = []\n            size = 0\n            while True:\n                chunk = response.read(1024 * 1024)\n                if not chunk:\n                    break\n                chunks.append(chunk)\n                size += len(chunk)\n                if size > 64 * 1024 * 1024 or time.monotonic() - start > 120:\n                    raise ValueError(\"Download exceeds finite size/time bound\")\n            data = b\"\".join(chunks)\n        entry[\"acquisition\"] = \"downloaded\"\n    identity = pdb_identity(data)\n    entry[\"pdb_identity\"] = identity\n    if (identity[\"guid\"], identity[\"age\"]) != (cv[\"guid\"], cv[\"age\"]):\n        raise ValueError(\"Downloaded PDB GUID+age does not match DLL CodeView\")\n    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True})\n    target.parent.mkdir(parents=True, exist_ok=True)\n    if not target.exists():\n        target.write_bytes(data)\n    flat = ROOT / \"flat\" / cv[\"name\"]\n    flat.parent.mkdir(parents=True, exist_ok=True)\n    if flat.exists():\n        if sha256(flat.read_bytes()) != entry[\"pdb_sha256\"]:\n            raise ValueError(f\"Different PDB already occupies flat path: {flat}\")\n        entry[\"flat_staging\"] = \"existing-revalidated\"\n    else:\n        os.link(target, flat)\n        entry[\"flat_staging\"] = \"hardlink\"\n    entry.update({\"flat_path\": str(flat), \"flat_sha256\": sha256(flat.read_bytes()), \"status\": \"prepared\"})\n\n\ndef main():\n    receipt = {\n        \"started_utc\": datetime.datetime.now(datetime.timezone.utc).isoformat(),\n        \"script_path\": str(Path(__file__).resolve()),\n        \"script_sha256\": sha256(Path(__file__).read_bytes()),\n        \"sources\": SOURCES,\n        \"purpose\": \"Finite PDB file preparation only; no diagnostic runtime, debugger, builds, tests, or resident configuration changes\",\n        \"mapping_method\": \"Recorded missing PCs queried with GetModuleHandleExW(FROM_ADDRESS|UNCHANGED_REFCOUNT) in this preparation process, then checked against exact DLL SizeOfImage\",\n        \"mapping_scope_limit\": \"Original forced capture did not record module bases. These are directly observed matching system-module address ranges in the preparation process, not a module enumeration of the terminated capture process.\",\n        \"search_path_environment\": {\"SPT_NET_DIAG_SYMBOL_DIR\": str(ROOT / \"flat\")},\n        \"integration_requirement\": \"Append this plain local absolute directory to the explicit executable-directory DbgHelp search path before initialization. Retain exact-PDB and ignore-CodeView-path policies; do not add srv, URLs, UNC, ambient symbol paths, or capture-time downloads.\",\n        \"modules\": [],\n        \"errors\": [],\n    }\n    try:\n        source = STACKS.read_bytes()\n        rows = [json.loads(line) for line in source.splitlines() if line]\n        first = rows[0]\n        pcs = {int(frame.split()[0], 16) for worker in first[\"workers\"] for frame in worker[\"frames\"] if \"symbol unavailable\" in frame}\n        if not pcs:\n            raise ValueError(\"First capture has no unresolved PCs\")\n        all_pcs = {int(frame.split()[0], 16) for row in rows for worker in row[\"workers\"] for frame in worker[\"frames\"] if \"symbol unavailable\" in frame}\n        receipt[\"capture_evidence\"] = {\"path\": str(STACKS), \"sha256\": sha256(source), \"first_capture_id\": first[\"capture_id\"], \"broker_pid\": first[\"broker_pid\"], \"worker_tids\": [worker[\"tid\"] for worker in first[\"workers\"]], \"first_missing_pcs\": [hex(pc) for pc in sorted(pcs)], \"additional_missing_pcs_in_later_captures\": [hex(pc) for pc in sorted(all_pcs - pcs)]}\n        receipt[\"modules\"] = map_recorded_pcs(pcs)\n        for entry in receipt[\"modules\"]:\n            try:\n                prepare_module(entry)\n            except Exception as error:\n                entry.update({\"status\": \"failed\", \"error\": f\"{type(error).__name__}: {error}\"})\n                receipt[\"errors\"].append(entry[\"error\"])\n    except Exception as error:\n        receipt[\"errors\"].append(f\"{type(error).__name__}: {error}\")\n    receipt[\"status\"] = \"prepared\" if receipt[\"modules\"] and not receipt[\"errors\"] else \"failed\"\n    receipt[\"finished_utc\"] = datetime.datetime.now(datetime.timezone.utc).isoformat()\n    path = ROOT / \"preparation-receipt.json\"\n    path.write_text(json.dumps(receipt, indent=2) + \"\\n\", encoding=\"utf-8\")\n    print(json.dumps({\"status\": receipt[\"status\"], \"receipt\": str(path), \"modules\": [{\"dll\": m[\"dll_path\"], \"status\": m.get(\"status\"), \"pdb_identity\": m.get(\"pdb_identity\"), \"error\": m.get(\"error\")} for m in receipt[\"modules\"]]}, indent=2))\n    return 0 if receipt[\"status\"] == \"prepared\" else 1\n\n\nif __name__ == \"__main__\":\n    raise SystemExit(main())\n"},"intent":"Writing finite symbol preparation"}],"api":"openai-codex-responses","provider":"openai-codex","model":"gpt-6-astra","usage":{"input":3640,"output":3825,"cacheRead":35840,"cacheWrite":0,"totalTokens":43305,"reasoningTokens":157,"cost":{"input":0.0364,"output":0.19125,"cacheRead":0.03584,"cacheWrite":0,"total":0.26349}},"stopReason":"toolUse","timestamp":1789543949729,"responseId":"resp_092438c1974c5cc3016aaa460deeec87d190be516911fb4acb","providerPayload":{"type":"openaiResponsesHistory","provider":"openai-codex","dt":true,"items":[{"id":"rs_092438c1974c5cc3016aaa4618175c87d1b8638345a2e061a0","type":"reasoning","content":[],"encrypted_content":"gAAAAABqqkYfKrbqxibjShU4Nbbg0PnULjzhHq_b0-YJsZ7DCgcWfDpVMYBWAaTEvawcU_TDfOSmVo1Cm1TNXwcFxop83UL-PUhhz35IG9QDmc5BwHtAHyn727M2K7dtzAwVVg4WAV3IVQ2O_Ob7vvkAiteA0vmrdaJcIZlWP6a5W0zkwKWYfEuO1DamSdu-3Yx4ubdJv5Gl6vDj9RQBkES35WICmxBDdkRLiZ1zarrQfYtnbNj43FYpIe-duv-mfCEacSGmiGIbvhPtlZPb_8rK0k4nPeO9C8-h7O-HuS6RLDuyora47OYDPL-FN9ZA9WoQobGpKBBjg8SbKZHJpObj0TwyDMkbu7LJp753Ts7MuKaEmBf8HG3chdDD838_p21ms_M6IZ3AW6TbtmGI706PbHzJdUPBIvOEjgsZLrSYYbS5Bsgfm40wv7inHWUyHLyCCAV-eTazbl0PLim8oF-uLiwvdPxByRHhSg8XePVVGynW29hJOj2wcFW7KLXMeWLpBj_o89_tB_08f7hEsviPfrbvFNp1rXKHZzhO7TCApq28nNDeebho_sQiEU_RzNmTswsiPjo56PyrBtspqcsS3uyVDovQzqbgeamyCK2a0A29c1Roj6wZleEBrclq9owbKXFdVh0z6Vl_MgSQsh-mwdUgmMQ1P2ewVlAzO-vNFfb-gqyFehDdKfkZ2lsLdMWDcycsmqgJSy0fr45add8tos3RRcgkIaw1gGEah-3K_Y7U80bnPjruVQXeI3Tf08OwWH6rlx4hq2NG6SGQl7I0qJdkapgxRxjrhicSjF3aYx-1nLfv9zdoqy61BmyOEhpvt0UOcS1sg18H0JN8etVzOcMfBz7thzO_faAfP6VmMrjX93NZfWXMm3pW--wZVxdZZkTGJzF6qZFS9YJnZ4SCJtcJiwj0zT41Q-gcSJNkCGZK0lTactA3tElKNiY4H8f3Ls3Rc9bH6BJaWU-jA40DAWvij6hx4PgXZBbxI1iTqv13-nQ9Su_69iQMAd4BEx_7GJ6t7RxnxmTk5WyLLWk_2Urf__8_bca5e9tESdMjD4r3h9V_vQgX5To42Co6HpIzrWu3LXnTv4r6rpxmlFtEoIV6solbm1B2ek6J5VnWpogHiltO4-zheGEDDn81_XeWHhNA7K6nxhV2itKoPnjkwJnhK9q25OQJZL8GiT06k4APLsG0wcbO35nbK6t4-cpYxH0YreDR-ICA1JJiomgrV-A56R-8BCAX_F0nlASqHqsh8WLr_zqZVIP0_F5z6vfqRCOTmUq7Y-kTkP7yMygWAY3Z_0mvK_BdoRT9XZpHESP3FHZV-KU8InC1fk1v1x0Ep1ZfmgLyKO1hD9WpIbS_uKjBE45_Q1pkE6_8Pt1RLUB-7nLtlu46ENNfHdmZmnFoJUw98cox-emH2LFYHul5j648ZOc5z7Mnu-jE5c4fOmg0NKay6rRqWLwzsGUc16-VB-pKwz0r29ScA-hrFtRdApx3a66lWlg9FzgkEIYrPNmJiBH7up63ld1_dzAImnOEfVd2qAaSQPNXWwsxehjtKsG4FSybu0xt89P7aEXLbi-j-eeUPiHfqRE7vsfMv2HtoqRO3WzKIDGOVoK2-uJErWE8Hndvn0K46t14c-4pYuSxltHMszVYGQLzU5O0KmwfanwBA7NvFav_xc88BSouI6-bVt6DQX4Oyb3t2dQdEu7q182RsrTzkBhEZdV6R5DvrIN8uqiBKmAdXsWYsyNDWpmhAVFh1uaO0bgf_2HxIZVxrxo8FkfNl6jDcysXOuJBLWmKN6WbyXBZzTMavKhQAOGk6TaBsEBLQ6af0Ay9xBN57V7YctI1Ffg-LZ6gWW_q44Yt0Dkvt3P83nasKIKJLU9N9ulr27aZilSYN80mrT79t0cxbqDu3fN_3hdCtNK_oF8kAV86gFC2udn04WEBMJjJDcpJBfV9cp26dDIHUnqvEhYrocukSs1tGvnBxrRLAxTZsT3OjYxDE9LumkpfUsWVXXltFSbOE_T9Zi_Nngl4dHJC87hsrkw4LpX6pA1k8CjQM6F_Z1Mv9vJ8-kmsAhbi_RjRzNMojS5JlIqGKU3RFF_9OGZ07vJ_IQg2ROOPufGEGxEaFtTINa9miH8XRI2O0cgEnJMkx1hlF_sRGBS-WywZUhKMrCTx9ZsIYRVC19gXpUO3cb8rh1vxsugmxzQf-tVvzJNkxgIGfcf75p02m1D1MnLoQNThfb5QK-HvmWr6bFw3JyAhWm-tBKBmuHtHof5Xy3M0aXe1560QZjrxXgVf8T4SU2GlU2rzdPh7mRM3Ncr8VkmvlFSka46yWvEoOWKseEJYTD4j0lzbpV0GubYgqidWJAvVoOJpjbywIX-_suIEZCMN-oKGpCYzWi6DNt2xcdWIS23DBj35aiJMv7X4MN8=","internal_chat_message_metadata_passthrough":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"},"summary":[{"type":"summary_text","text":"**Building the validation script**"},{"type":"summary_text","text":"**Validating PDB identity**"}],"metadata":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"}},{"id":"fc_092438c1974c5cc3016aaa461fbca087d1bb59ccb3c6e954a2","type":"function_call","status":"completed","arguments":"{\"i\":\"Writing finite symbol preparation\",\"path\":\".spt/preserved/302/symbols/prepare_symbols.py\",\"content\":\"\\\"\\\"\\\"Prepare exact local PDBs from recorded missing PCs; never launch/attach a target.\\\"\\\"\\\"\\nimport ctypes\\nimport datetime\\nimport hashlib\\nimport json\\nimport os\\nfrom pathlib import Path\\nimport struct\\nimport time\\nimport urllib.request\\nimport uuid\\n\\nROOT = Path(__file__).resolve().parent\\nSTACKS = ROOT.parent / \\\"todlando-windows/forced-1/analysis/stacks.jsonl\\\"\\nSERVER = \\\"https://msdl.microsoft.com/download/symbols\\\"\\nSOURCES = [\\n    \\\"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv\\\",\\n    \\\"https://learn.microsoft.com/en-us/windows/win32/debug/pe-format\\\",\\n    \\\"https://llvm.org/docs/PDB/MsfFile.html\\\",\\n    \\\"https://llvm.org/docs/PDB/PdbStream.html\\\",\\n]\\n\\n\\ndef sha256(data):\\n    return hashlib.sha256(data).hexdigest()\\n\\n\\ndef take(data, offset, size):\\n    if offset < 0 or size < 0 or offset + size > len(data):\\n        raise ValueError(f\\\"Out-of-bounds file read: {offset}+{size}/{len(data)}\\\")\\n    return data[offset:offset + size]\\n\\n\\ndef unpack(fmt, data, offset):\\n    return struct.unpack(fmt, take(data, offset, struct.calcsize(fmt)))\\n\\n\\ndef pe_identity(data):\\n    if take(data, 0, 2) != b\\\"MZ\\\":\\n        raise ValueError(\\\"Missing DOS signature\\\")\\n    pe, = unpack(\\\"<I\\\", data, 0x3c)\\n    if take(data, pe, 4) != b\\\"PE\\\\0\\\\0\\\":\\n        raise ValueError(\\\"Missing PE signature\\\")\\n    machine, sections, timestamp, _, _, optional_size, _ = unpack(\\\"<HHIIIHH\\\", data, pe + 4)\\n    optional = pe + 24\\n    magic, = unpack(\\\"<H\\\", data, optional)\\n    if machine != 0x8664 or magic != 0x20b:\\n        raise ValueError(\\\"Expected native x64 PE32+ system DLL\\\")\\n    if optional_size < 112 + 7 * 8 or unpack(\\\"<I\\\", data, optional + 108)[0] < 7:\\n        raise ValueError(\\\"Missing debug data directory\\\")\\n    image_size, headers_size = unpack(\\\"<II\\\", data, optional + 56)\\n    debug_rva, debug_size = unpack(\\\"<II\\\", data, optional + 112 + 6 * 8)\\n    section_ranges = []\\n    for i in range(sections):\\n        entry = optional + optional_size + 40 * i\\n        virtual_size, rva, raw_size, raw_offset = unpack(\\\"<IIII\\\", data, entry + 8)\\n        section_ranges.append((rva, raw_size, raw_offset))\\n\\n    def file_offset(rva):\\n        if rva < headers_size:\\n            return rva\\n        for start, size, offset in section_ranges:\\n            if start <= rva < start + size:\\n                return offset + rva - start\\n        raise ValueError(f\\\"RVA 0x{rva:x} lacks file-backed section\\\")\\n\\n    if not debug_rva or not debug_size or debug_size % 28:\\n        raise ValueError(\\\"Invalid debug directory\\\")\\n    records = []\\n    debug_offset = file_offset(debug_rva)\\n    for i in range(debug_size // 28):\\n        _, _, _, _, kind, size, _, raw = unpack(\\\"<IIHHIIII\\\", data, debug_offset + i * 28)\\n        if kind != 2:\\n            continue\\n        codeview = take(data, raw, size)\\n        if take(codeview, 0, 4) != b\\\"RSDS\\\":\\n            raise ValueError(\\\"CodeView is not RSDS\\\")\\n        guid = uuid.UUID(bytes_le=take(codeview, 4, 16))\\n        age, = unpack(\\\"<I\\\", codeview, 20)\\n        name_data = take(codeview, 24, len(codeview) - 24)\\n        if b\\\"\\\\0\\\" not in name_data:\\n            raise ValueError(\\\"Unterminated PDB name\\\")\\n        embedded = name_data.split(b\\\"\\\\0\\\", 1)[0].decode(\\\"utf-8\\\")\\n        name = embedded.replace(\\\"\\\\\\\\\\\", \\\"/\\\").split(\\\"/\\\")[-1]\\n        if not name.lower().endswith(\\\".pdb\\\") or any(c not in \\\"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_.-\\\" for c in name):\\n            raise ValueError(\\\"Unsafe PDB basename\\\")\\n        records.append({\\\"guid\\\": str(guid).upper(), \\\"age\\\": age, \\\"key\\\": guid.hex.upper() + format(age, \\\"X\\\"), \\\"name\\\": name, \\\"embedded_path\\\": embedded})\\n    if len(records) != 1:\\n        raise ValueError(f\\\"Expected exactly one CodeView record, found {len(records)}\\\")\\n    return {\\\"machine\\\": hex(machine), \\\"timestamp\\\": hex(timestamp), \\\"image_size\\\": image_size, \\\"codeview\\\": records[0]}\\n\\n\\ndef pdb_identity(data):\\n    if take(data, 0, 32) != b\\\"Microsoft C/C++ MSF 7.00\\\\r\\\\n\\\\x1aDS\\\\0\\\\0\\\\0\\\":\\n        raise ValueError(\\\"Unsupported PDB container (expected MSF 7)\\\")\\n    block_size, _, blocks, directory_size, _, block_map = unpack(\\\"<6I\\\", data, 32)\\n    if block_size not in (512, 1024, 2048, 4096) or blocks * block_size != len(data):\\n        raise ValueError(\\\"Invalid MSF block geometry\\\")\\n    directory_count = (directory_size + block_size - 1) // block_size\\n    if directory_count * 4 > block_size:\\n        raise ValueError(\\\"Unsupported multi-block MSF directory map\\\")\\n    directory_blocks = unpack(f\\\"<{directory_count}I\\\", data, block_map * block_size)\\n    directory = b\\\"\\\".join(take(data, b * block_size, block_size) for b in directory_blocks)[:directory_size]\\n    stream_count, = unpack(\\\"<I\\\", directory, 0)\\n    if stream_count < 2:\\n        raise ValueError(\\\"PDB info stream missing\\\")\\n    sizes = unpack(f\\\"<{stream_count}I\\\", directory, 4)\\n    cursor = 4 + stream_count * 4\\n    for index, size in enumerate(sizes[:2]):\\n        if size == 0xffffffff:\\n            if index == 1:\\n                raise ValueError(\\\"PDB info stream absent\\\")\\n            continue\\n        count = (size + block_size - 1) // block_size\\n        stream_blocks = unpack(f\\\"<{count}I\\\", directory, cursor)\\n        cursor += count * 4\\n        if index == 1:\\n            info = b\\\"\\\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\\n            version, signature, age = unpack(\\\"<III\\\", info, 0)\\n            guid = uuid.UUID(bytes_le=take(info, 12, 16))\\n            return {\\\"guid\\\": str(guid).upper(), \\\"age\\\": age, \\\"version\\\": version, \\\"signature\\\": signature}\\n    raise ValueError(\\\"PDB info stream not decoded\\\")\\n\\n\\ndef map_recorded_pcs(pcs):\\n    kernel = ctypes.WinDLL(\\\"kernel32\\\", use_last_error=True)\\n    kernel.GetModuleHandleExW.argtypes = [ctypes.c_ulong, ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p)]\\n    kernel.GetModuleHandleExW.restype = ctypes.c_int\\n    kernel.GetModuleFileNameW.argtypes = [ctypes.c_void_p, ctypes.c_wchar_p, ctypes.c_ulong]\\n    kernel.GetModuleFileNameW.restype = ctypes.c_ulong\\n    modules = {}\\n    for pc in sorted(pcs):\\n        module = ctypes.c_void_p()\\n        # FROM_ADDRESS | UNCHANGED_REFCOUNT; own preparation process only.\\n        if not kernel.GetModuleHandleExW(6, pc, ctypes.byref(module)):\\n            raise ctypes.WinError(ctypes.get_last_error())\\n        path = ctypes.create_unicode_buffer(32768)\\n        count = kernel.GetModuleFileNameW(module, path, len(path))\\n        if count == 0 or count >= len(path):\\n            raise ctypes.WinError(ctypes.get_last_error())\\n        dll = Path(path.value).resolve()\\n        if dll.parent != (Path(os.environ[\\\"SystemRoot\\\"]) / \\\"System32\\\").resolve():\\n            raise ValueError(f\\\"Recorded missing PC maps outside System32: {dll}\\\")\\n        key = str(dll).lower()\\n        entry = modules.setdefault(key, {\\\"dll_path\\\": str(dll), \\\"preparation_process_base\\\": hex(module.value), \\\"recorded_pcs\\\": []})\\n        entry[\\\"recorded_pcs\\\"].append({\\\"pc\\\": hex(pc), \\\"rva\\\": hex(pc - module.value)})\\n    return list(modules.values())\\n\\n\\ndef prepare_module(entry):\\n    dll_data = Path(entry[\\\"dll_path\\\"]).read_bytes()\\n    entry.update({\\\"dll_sha256\\\": sha256(dll_data), \\\"dll_size\\\": len(dll_data), \\\"pe\\\": pe_identity(dll_data)})\\n    for address in entry[\\\"recorded_pcs\\\"]:\\n        if not 0 <= int(address[\\\"rva\\\"], 16) < entry[\\\"pe\\\"][\\\"image_size\\\"]:\\n            raise ValueError(\\\"Recorded PC outside PE SizeOfImage\\\")\\n    cv = entry[\\\"pe\\\"][\\\"codeview\\\"]\\n    url = f\\\"{SERVER}/{cv['name']}/{cv['key']}/{cv['name']}\\\"\\n    target = ROOT / \\\"cache\\\" / cv[\\\"name\\\"] / cv[\\\"key\\\"] / cv[\\\"name\\\"]\\n    entry.update({\\\"download_url\\\": url, \\\"cache_path\\\": str(target)})\\n    if target.exists():\\n        data = target.read_bytes()\\n        entry[\\\"acquisition\\\"] = \\\"existing-cache-revalidated\\\"\\n    else:\\n        start = time.monotonic()\\n        request = urllib.request.Request(url, headers={\\\"User-Agent\\\": \\\"spt-302-local-symbol-preparation\\\"})\\n        with urllib.request.urlopen(request, timeout=30) as response:\\n            entry.update({\\\"http_status\\\": response.status, \\\"final_download_url\\\": response.geturl()})\\n            chunks = []\\n            size = 0\\n            while True:\\n                chunk = response.read(1024 * 1024)\\n                if not chunk:\\n                    break\\n                chunks.append(chunk)\\n                size += len(chunk)\\n                if size > 64 * 1024 * 1024 or time.monotonic() - start > 120:\\n                    raise ValueError(\\\"Download exceeds finite size/time bound\\\")\\n            data = b\\\"\\\".join(chunks)\\n        entry[\\\"acquisition\\\"] = \\\"downloaded\\\"\\n    identity = pdb_identity(data)\\n    entry[\\\"pdb_identity\\\"] = identity\\n    if (identity[\\\"guid\\\"], identity[\\\"age\\\"]) != (cv[\\\"guid\\\"], cv[\\\"age\\\"]):\\n        raise ValueError(\\\"Downloaded PDB GUID+age does not match DLL CodeView\\\")\\n    entry.update({\\\"pdb_sha256\\\": sha256(data), \\\"pdb_size\\\": len(data), \\\"identity_match\\\": True})\\n    target.parent.mkdir(parents=True, exist_ok=True)\\n    if not target.exists():\\n        target.write_bytes(data)\\n    flat = ROOT / \\\"flat\\\" / cv[\\\"name\\\"]\\n    flat.parent.mkdir(parents=True, exist_ok=True)\\n    if flat.exists():\\n        if sha256(flat.read_bytes()) != entry[\\\"pdb_sha256\\\"]:\\n            raise ValueError(f\\\"Different PDB already occupies flat path: {flat}\\\")\\n        entry[\\\"flat_staging\\\"] = \\\"existing-revalidated\\\"\\n    else:\\n        os.link(target, flat)\\n        entry[\\\"flat_staging\\\"] = \\\"hardlink\\\"\\n    entry.update({\\\"flat_path\\\": str(flat), \\\"flat_sha256\\\": sha256(flat.read_bytes()), \\\"status\\\": \\\"prepared\\\"})\\n\\n\\ndef main():\\n    receipt = {\\n        \\\"started_utc\\\": datetime.datetime.now(datetime.timezone.utc).isoformat(),\\n        \\\"script_path\\\": str(Path(__file__).resolve()),\\n        \\\"script_sha256\\\": sha256(Path(__file__).read_bytes()),\\n        \\\"sources\\\": SOURCES,\\n        \\\"purpose\\\": \\\"Finite PDB file preparation only; no diagnostic runtime, debugger, builds, tests, or resident configuration changes\\\",\\n        \\\"mapping_method\\\": \\\"Recorded missing PCs queried with GetModuleHandleExW(FROM_ADDRESS|UNCHANGED_REFCOUNT) in this preparation process, then checked against exact DLL SizeOfImage\\\",\\n        \\\"mapping_scope_limit\\\": \\\"Original forced capture did not record module bases. These are directly observed matching system-module address ranges in the preparation process, not a module enumeration of the terminated capture process.\\\",\\n        \\\"search_path_environment\\\": {\\\"SPT_NET_DIAG_SYMBOL_DIR\\\": str(ROOT / \\\"flat\\\")},\\n        \\\"integration_requirement\\\": \\\"Append this plain local absolute directory to the explicit executable-directory DbgHelp search path before initialization. Retain exact-PDB and ignore-CodeView-path policies; do not add srv, URLs, UNC, ambient symbol paths, or capture-time downloads.\\\",\\n        \\\"modules\\\": [],\\n        \\\"errors\\\": [],\\n    }\\n    try:\\n        source = STACKS.read_bytes()\\n        rows = [json.loads(line) for line in source.splitlines() if line]\\n        first = rows[0]\\n        pcs = {int(frame.split()[0], 16) for worker in first[\\\"workers\\\"] for frame in worker[\\\"frames\\\"] if \\\"symbol unavailable\\\" in frame}\\n        if not pcs:\\n            raise ValueError(\\\"First capture has no unresolved PCs\\\")\\n        all_pcs = {int(frame.split()[0], 16) for row in rows for worker in row[\\\"workers\\\"] for frame in worker[\\\"frames\\\"] if \\\"symbol unavailable\\\" in frame}\\n        receipt[\\\"capture_evidence\\\"] = {\\\"path\\\": str(STACKS), \\\"sha256\\\": sha256(source), \\\"first_capture_id\\\": first[\\\"capture_id\\\"], \\\"broker_pid\\\": first[\\\"broker_pid\\\"], \\\"worker_tids\\\": [worker[\\\"tid\\\"] for worker in first[\\\"workers\\\"]], \\\"first_missing_pcs\\\": [hex(pc) for pc in sorted(pcs)], \\\"additional_missing_pcs_in_later_captures\\\": [hex(pc) for pc in sorted(all_pcs - pcs)]}\\n        receipt[\\\"modules\\\"] = map_recorded_pcs(pcs)\\n        for entry in receipt[\\\"modules\\\"]:\\n            try:\\n                prepare_module(entry)\\n            except Exception as error:\\n                entry.update({\\\"status\\\": \\\"failed\\\", \\\"error\\\": f\\\"{type(error).__name__}: {error}\\\"})\\n                receipt[\\\"errors\\\"].append(entry[\\\"error\\\"])\\n    except Exception as error:\\n        receipt[\\\"errors\\\"].append(f\\\"{type(error).__name__}: {error}\\\")\\n    receipt[\\\"status\\\"] = \\\"prepared\\\" if receipt[\\\"modules\\\"] and not receipt[\\\"errors\\\"] else \\\"failed\\\"\\n    receipt[\\\"finished_utc\\\"] = datetime.datetime.now(datetime.timezone.utc).isoformat()\\n    path = ROOT / \\\"preparation-receipt.json\\\"\\n    path.write_text(json.dumps(receipt, indent=2) + \\\"\\\\n\\\", encoding=\\\"utf-8\\\")\\n    print(json.dumps({\\\"status\\\": receipt[\\\"status\\\"], \\\"receipt\\\": str(path), \\\"modules\\\": [{\\\"dll\\\": m[\\\"dll_path\\\"], \\\"status\\\": m.get(\\\"status\\\"), \\\"pdb_identity\\\": m.get(\\\"pdb_identity\\\"), \\\"error\\\": m.get(\\\"error\\\")} for m in receipt[\\\"modules\\\"]]}, indent=2))\\n    return 0 if receipt[\\\"status\\\"] == \\\"prepared\\\" else 1\\n\\n\\nif __name__ == \\\"__main__\\\":\\n    raise SystemExit(main())\\n\"}","call_id":"call_5Z8jckdczIIXv5PZoU9J4fBK","internal_chat_message_metadata_passthrough":{"create_time":1789543950.123012,"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"},"name":"write","metadata":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"}}]},"duration":125848.46620000154,"ttft":10385.165300000459,"completedAt":1789544075579,"contextSnapshot":{"promptTokens":39480,"nonMessageTokens":16994,"compactionEpoch":0}}}
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{"type":"message","id":"edd711e0","parentId":"74b59a29","timestamp":"2026-09-16T07:35:00.257Z","message":{"role":"toolResult","toolCallId":"call_LZsYgm887kZnFJ7pRYnYJ23I|fc_0b35c61c3c988ca2016aaa469dc2a087d1a336ed10a8eeeeac","toolName":"bash","content":[{"type":"text","text":"{\n  \"status\": \"failed\",\n  \"receipt\": \"C:\\\\Users\\\\decid\\\\Documents\\\\projects\\\\spt-core\\\\.spt\\\\preserved\\\\302\\\\symbols\\\\preparation-receipt.json\",\n  \"modules\": [\n    {\n      \"dll\": \"C:\\\\Windows\\\\System32\\\\KernelBase.dll\",\n      \"status\": \"failed\",\n      \"pdb_identity\": {\n        \"guid\": \"D218BA2F-1C9B-5E12-CC72-23574B1B6698\",\n        \"age\": 2,\n        \"version\": 20000404,\n        \"signature\": 3392326996\n      },\n      \"error\": \"ValueError: Downloaded PDB GUID+age does not match DLL CodeView\"\n    },\n    {\n      \"dll\": \"C:\\\\Windows\\\\System32\\\\kernel32.dll\",\n      \"status\": \"failed\",\n      \"pdb_identity\": {\n        \"guid\": \"2554A4D7-DED5-5C1D-6F03-3011500EA781\",\n        \"age\": 2,\n        \"version\": 20000404,\n        \"signature\": 3084580888\n      },\n      \"error\": \"ValueError: Downloaded PDB GUID+age does not match DLL CodeView\"\n    },\n    {\n      \"dll\": \"C:\\\\Windows\\\\System32\\\\ntdll.dll\",\n      \"status\": \"failed\",\n      \"pdb_identity\": {\n        \"guid\": \"18062223-13D4-1042-66A4-820B86925E3B\",\n        \"age\": 4,\n        \"version\": 20000404,\n        \"signature\": 3127239842\n      },\n      \"error\": \"ValueError: Downloaded PDB GUID+age does not match DLL CodeView\"\n    }\n  ]\n}\n\n\nWall time: 4.89 seconds\n\nCommand exited with code 1"}],"details":{"timeoutSeconds":480,"wallTimeMs":4889.8407000005245,"exitCode":1},"isError":true,"timestamp":1789544100256}}
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{"type":"message","id":"8564326b","parentId":"b3b224b5","timestamp":"2026-09-16T07:35:23.617Z","message":{"role":"toolResult","toolCallId":"call_2yEB8Jxy12PDXH5yYjlSBhCO|fc_0b35c61c3c988ca2016aaa46bb1de087d189799af830bf25e6","toolName":"read","content":[{"type":"text","text":"URL: https://llvm.org/docs/PDB/DbiStream.html\nContent-Type: text/html\nMethod: native\n\n---\n\n---\nmeta-color-scheme: light dark\nmeta-viewport: width=device-width, initial-scale=1\ntitle: The PDB DBI (Debug Info) Stream - LLVM\n---\nHide navigation sidebar\n\nHide table of contents sidebar\n\nToggle site navigation sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctbWVudSIgLz48L3N2Zz4=)*\n\n[LLVM](../index.html)\n\nToggle Light / Dark / Auto color theme\n\n![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWF1dG8iPjx1c2UgaHJlZj0iI3N2Zy1zdW4taGFsZiIgLz48L3N2Zz4=)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWRhcmsiPjx1c2UgaHJlZj0iI3N2Zy1tb29uIiAvPjwvc3ZnPg==)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWxpZ2h0Ij48dXNlIGhyZWY9IiNzdmctc3VuIiAvPjwvc3ZnPg==)\n\nToggle table of contents sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctdG9jIiAvPjwvc3ZnPg==)*\n\n[![SVG Image](data:image/svg+xml;base64,PHN2ZyB2aWV3Qm94PSIwIDAgMjQgMjQiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+CiAgICAgICAgICAgIDxwYXRoIGQ9Ik0xMyAyMGgtMlY4bC01LjUgNS41LTEuNDItMS40MkwxMiA0LjE2bDcuOTIgNy45Mi0xLjQyIDEuNDJMMTMgOHYxMnoiIC8+CiAgICAgICAgICA8L3N2Zz4=) Back to top](#)\n\n[![SVG Image](data:image/svg+xml;base64,PHN2ZyBhcmlhLWhpZGRlbj0idHJ1ZSIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS1saW5lY2FwPSJyb3VuZCIgc3Ryb2tlLWxpbmVqb2luPSJyb3VuZCIgc3Ryb2tlLXdpZHRoPSIxLjUiIHZpZXdCb3g9IjAgMCAyNCAyNCI+CiAgICAgIDxwYXRoIGQ9Ik0wIDBoMjR2MjRIMHoiIGZpbGw9Im5vbmUiIHN0cm9rZT0ibm9uZSIgLz4KICAgICAgPHBhdGggZD0iTTQgMjBoNGwxMC41IC0xMC41YTEuNSAxLjUgMCAwIDAgLTQgLTRsLTEwLjUgMTAuNXY0IiAvPgogICAgICA8bGluZSB4MT0iMTMuNSIgeDI9IjE3LjUiIHkxPSI2LjUiIHkyPSIxMC41IiAvPgogICAgPC9zdmc+) Edit this page](https://github.com/llvm/llvm-project/edit/main/llvm/docs/PDB/DbiStream.md \"Edit this page\")\n\nToggle Light / Dark / Auto color theme\n\n![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWF1dG8iPjx1c2UgaHJlZj0iI3N2Zy1zdW4taGFsZiIgLz48L3N2Zz4=)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWRhcmsiPjx1c2UgaHJlZj0iI3N2Zy1tb29uIiAvPjwvc3ZnPg==)![SVG Image](data:image/svg+xml;base64,PHN2ZyBjbGFzcz0idGhlbWUtaWNvbi13aGVuLWxpZ2h0Ij48dXNlIGhyZWY9IiNzdmctc3VuIiAvPjwvc3ZnPg==)\n\nToggle table of contents sidebar\n\n*![SVG Image](data:image/svg+xml;base64,PHN2Zz48dXNlIGhyZWY9IiNzdmctdG9jIiAvPjwvc3ZnPg==)*\n\n# The PDB DBI (Debug Info) Stream[#](#the-pdb-dbi-debug-info-stream \"Link to this heading\")\n\n## Introduction[#](#introduction \"Link to this heading\")\n\nThe PDB DBI Stream (Index 3) is one of the largest and most important streams\nin a PDB file. It contains information about how the program was compiled,\n(e.g. compilation flags, etc), the compilands (e.g. object files) that\nwere used to link together the program, the source files which were used\nto build the program, as well as references to other streams that contain more\ndetailed information about each compiland, such as the CodeView symbol records\ncontained within each compiland and the source and line information for\nfunctions and other symbols within each compiland.\n\n## Stream Header[#](#stream-header \"Link to this heading\")\n\nAt offset 0 of the DBI Stream is a header with the following layout:\n\n```\nstruct DbiStreamHeader {\n  int32_t VersionSignature;\n  uint32_t VersionHeader;\n  uint32_t Age;\n  uint16_t GlobalStreamIndex;\n  uint16_t BuildNumber;\n  uint16_t PublicStreamIndex;\n  uint16_t PdbDllVersion;\n  uint16_t SymRecordStream;\n  uint16_t PdbDllRbld;\n  int32_t ModInfoSize;\n  int32_t SectionContributionSize;\n  int32_t SectionMapSize;\n  int32_t SourceInfoSize;\n  int32_t TypeServerMapSize;\n  uint32_t MFCTypeServerIndex;\n  int32_t OptionalDbgHeaderSize;\n  int32_t ECSubstreamSize;\n  uint16_t Flags;\n  uint16_t Machine;\n  uint32_t Padding;\n};\n```\n\n- **VersionSignature** - Unknown meaning. Appears to always be `-1`.\n\n- **VersionHeader** - A value from the following enum.\n\n```\nenum class DbiStreamVersion : uint32_t {\n  VC41 = 930803,\n  V50 = 19960307,\n  V60 = 19970606,\n  V70 = 19990903,\n  V110 = 20091201\n};\n```\n\nSimilar to the [PDB Stream](PdbStream.html), this value always appears to be `V70`, and it is not clear what the other values are for.\n\n- **Age** - The number of times the PDB has been written. Equal to the same\nfield from the [PDB Stream header](PdbStream.html#pdb-stream-header).\n\n- **GlobalStreamIndex** - The index of the [Global Symbol Stream](GlobalStream.html),\nwhich contains CodeView symbol records for all global symbols. Actual records\nare stored in the symbol record stream, and are referenced from this stream.\n\n- **BuildNumber** - A bitfield containing values representing the major and minor\nversion number of the toolchain (e.g. 12.0 for MSVC 2013) used to build the\nprogram, with the following layout:\n\n```\nuint16_t MinorVersion : 8;\nuint16_t MajorVersion : 7;\nuint16_t NewVersionFormat : 1;\n```\n\nFor the purposes of LLVM, we assume `NewVersionFormat` to be always `true`.\nIf it is `false`, the layout above does not apply and the reader should consult\nthe [Microsoft Source Code](https://github.com/Microsoft/microsoft-pdb) for\nfurther guidance.\n\n- **PublicStreamIndex** - The index of the [Public Symbol Stream](PublicStream.html),\nwhich contains CodeView symbol records for all public symbols. Actual records\nare stored in the symbol record stream, and are referenced from this stream.\n\n- **PdbDllVersion** - The version number of `mspdbXXXX.dll` used to produce this\nPDB. Note this obviously does not apply for LLVM as LLVM does not use `mspdb.dll`.\n\n- **SymRecordStream** - The stream containing all CodeView symbol records used\nby the program. This is used for deduplication, so that many different\ncompilands can refer to the same symbols without having to include the full record\ncontent inside of each module stream.\n\n- **PdbDllRbld** - Unknown\n\n- **MFCTypeServerIndex** - The index of the MFC type server in the [Type Server Map Substream](#dbi-type-server-map-substream).\n\n- **Flags** - A bitfield with the following layout, containing various\ninformation about how the program was built:\n\n```\nuint16_t WasIncrementallyLinked : 1;\nuint16_t ArePrivateSymbolsStripped : 1;\nuint16_t HasConflictingTypes : 1;\nuint16_t Reserved : 13;\n```\n\nThe only one of these that is not self-explanatory is `HasConflictingTypes`.\nAlthough undocumented, `link.exe` contains a hidden flag `/DEBUG:CTYPES`.\nIf it is passed to `link.exe`, this field will be set. Otherwise it will\nnot be set. It is unclear what this flag does, although it seems to have\nsubtle implications on the algorithm used to look up type records.\n\n- **Machine** - A value from the [CV_CPU_TYPE_e](https://msdn.microsoft.com/en-us/library/b2fc64ek.aspx) enumeration. Common values are `0x8664` (x86-64) and `0x14C` (x86).\n\nImmediately after the fixed-size DBI Stream header are `7` variable-length *substreams*. The following `7` fields of the DBI Stream header specify the\nnumber of bytes of the corresponding substream. Each substream’s contents will\nbe described in detail [below](#dbi-substreams). The length of the entire\nDBI Stream should equal `64` (the length of the header above) plus the value\nof each of the following `7` fields.\n\n- **ModInfoSize** - The length of the [Module Info Substream](#dbi-mod-info-substream).\n\n- **SectionContributionSize** - The length of the [Section Contribution Substream](#dbi-sec-contr-substream).\n\n- **SectionMapSize** - The length of the [Section Map Substream](#dbi-section-map-substream).\n\n- **SourceInfoSize** - The length of the [File Info Substream](#dbi-file-info-substream).\n\n- **TypeServerMapSize** - The length of the [Type Server Map Substream](#dbi-type-server-map-substream).\n\n- **OptionalDbgHeaderSize** - The length of the [Optional Debug Header Stream](#dbi-optional-dbg-stream).\n\n- **ECSubstreamSize** - The length of the [EC Substream](#dbi-ec-substream).\n\n## Substreams[#](#substreams \"Link to this heading\")\n\n### Module Info Substream[#](#module-info-substream \"Link to this heading\")\n\nBegins at offset `0` immediately after the [header](#dbi-header). The\nmodule info substream is an array of variable-length records, each one\ndescribing a single module (e.g. object file) linked into the program. Each\nrecord in the array has the format:\n\n```\nstruct ModInfo {\n  uint32_t Unused1;\n  struct SectionContribEntry {\n    uint16_t Section;\n    char Padding1[2];\n    int32_t Offset;\n    int32_t Size;\n    uint32_t Characteristics;\n    uint16_t ModuleIndex;\n    char Padding2[2];\n    uint32_t DataCrc;\n    uint32_t RelocCrc;\n  } SectionContr;\n  uint16_t Flags;\n  uint16_t ModuleSymStream;\n  uint32_t SymByteSize;\n  uint32_t C11ByteSize;\n  uint32_t C13ByteSize;\n  uint16_t SourceFileCount;\n  char Padding[2];\n  uint32_t Unused2;\n  uint32_t SourceFileNameIndex;\n  uint32_t PdbFilePathNameIndex;\n  char ModuleName[];\n  char ObjFileName[];\n};\n```\n\n- **SectionContr** - Describes the properties of the section in the final binary\nwhich contain the code and data from this module.\n\n  `SectionContr.Characteristics` corresponds to the `Characteristics` field\nof the [IMAGE_SECTION_HEADER](https://msdn.microsoft.com/en-us/library/windows/desktop/ms680341(v=vs.85).aspx) structure.\n\n- **Flags** - A bitfield with the following format:\n\n```\n// ``true`` if this ModInfo has been written since reading the PDB.  This is\n// likely used to support incremental linking, so that the linker can decide\n// if it needs to commit changes to disk.\nuint16_t Dirty : 1;\n// ``true`` if EC information is present for this module. EC is presumed to\n// stand for \"Edit & Continue\", which LLVM does not support.  So this flag\n// will always be false.\nuint16_t EC : 1;\nuint16_t Unused : 6;\n// Type Server Index for this module.  This is assumed to be related to /Zi,\n// but as LLVM treats /Zi as /Z7, this field will always be invalid for LLVM\n// generated PDBs.\nuint16_t TSM : 8;\n```\n\n- **ModuleSymStream** - The index of the stream that contains symbol information\nfor this module. This includes CodeView symbol information as well as source\nand line information. If this field is -1, then no additional debug info will\nbe present for this module (for example, this is what happens when you strip\nprivate symbols from a PDB).\n\n- **SymByteSize** - The number of bytes of data from the stream identified by `ModuleSymStream` that represent CodeView symbol records.\n\n- **C11ByteSize** - The number of bytes of data from the stream identified by `ModuleSymStream` that represent C11-style CodeView line information.\n\n- **C13ByteSize** - The number of bytes of data from the stream identified by `ModuleSymStream` that represent C13-style CodeView line information. At\nmost one of `C11ByteSize` and `C13ByteSize` will be non-zero. Modern PDBs\nalways use C13 instead of C11.\n\n- **SourceFileCount** - The number of source files that contributed to this\nmodule during compilation.\n\n- **SourceFileNameIndex** - The offset in the names buffer of the primary\ntranslation unit used to build this module. All PDB files observed to date\nalways have this value equal to 0.\n\n- **PdbFilePathNameIndex** - The offset in the names buffer of the PDB file\ncontaining this module’s symbol information. This has only been observed\nto be non-zero for the special `* Linker *` module.\n\n- **ModuleName** - The module name. This is usually either a full path to an\nobject file (either directly passed to `link.exe` or from an archive) or\na string of the form `Import:<dll name>`.\n\n- **ObjFileName** - The object file name. In the case of an module that is\nlinked directly passed to `link.exe`, this is the same as **ModuleName**.\nIn the case of a module that comes from an archive, this is usually the full\npath to the archive.\n\n### Section Contribution Substream[#](#section-contribution-substream \"Link to this heading\")\n\nBegins at offset `0` immediately after the [Module Info Substream](#dbi-mod-info-substream) ends,\nand consumes `Header->SectionContributionSize` bytes. This substream begins\nwith a single `uint32_t` which will be one of the following values:\n\n```\nenum class SectionContrSubstreamVersion : uint32_t {\n  Ver60 = 0xeffe0000 + 19970605,\n  V2 = 0xeffe0000 + 20140516\n};\n```\n\n`Ver60` is the only value which has been observed in a PDB so far. Following\nthis is an array of fixed-length structures. If the version is `Ver60`,\nit is an array of `SectionContribEntry` structures (this is the nested structure\nfrom the `ModInfo` type. If the version is `V2`, it is an array of `SectionContribEntry2` structures, defined as follows:\n\n```\nstruct SectionContribEntry2 {\n  SectionContribEntry SC;\n  uint32_t ISectCoff;\n};\n```\n\nThe purpose of the second field is not well understood. The name implies that\nis the index of the COFF section, but this also describes the existing field `SectionContribEntry::Section`.\n\n### Section Map Substream[#](#section-map-substream \"Link to this heading\")\n\n[Showing lines 1-300 of 451. Use :301 to continue. Read artifact://713 for full output]"}],"details":{"kind":"url","url":"https://llvm.org/docs/PDB/DbiStream.html","finalUrl":"https://llvm.org/docs/PDB/DbiStream.html","contentType":"text/html","method":"native","truncated":true,"notes":[],"meta":{"source":{"type":"url","value":"https://llvm.org/docs/PDB/DbiStream.html"},"truncation":{"direction":"head","truncatedBy":"lines","totalLines":451,"totalBytes":21230,"outputLines":300,"outputBytes":12901,"shownRange":{"start":1,"end":300},"artifactId":"713","nextOffset":301}}},"isError":false,"timestamp":1789544123617}}
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{"type":"message","id":"f6b7da3e","parentId":"1794750f","timestamp":"2026-09-16T07:35:37.887Z","message":{"role":"toolResult","toolCallId":"call_C1dHjsgxNI8TGHmmZiTdwBUy|fc_0b35c61c3c988ca2016aaa46c9827887d182dadcfe4abab245","toolName":"read","content":[{"type":"text","text":"URL: https://raw.githubusercontent.com/microsoft/microsoft-pdb/master/PDB/dbi/pdb.cpp\nContent-Type: text/plain\nMethod: text\n\n---\n\n//////////////////////////////////////////////////////////////////////////////\n// PDB Debug Information API Implementation\n\n#include \"pdbimpl.h\"\n#include \"dbiimpl.h\"\n#include \"cvexefmt.h\"\n\n#include \"pdbguid.h\"\n\n#include \"locator.h\"\n\n#ifndef _WIN64\n\n#define _USE_32BIT_TIME_T       // Use 32 bit time_t (DbgHelp needs this because it uses system CRT)\n#define _INC_TIME_INL           // Don't include inlined definitions of time()\n#define _INC_WTIME_INL          // Don't include inlined definitions of wtime()\n#include <time.h>\n\nextern \"C\" _ACRTIMP time_t time( time_t *timer );\n\n#else\n\n#include <time.h>\n\n#endif\n\n#include \"objbase.h\"\n#include \"szcanon.h\"\n#include \"pdbver.h\"\n\n#include \"sha256.cpp\"\n\nextern\nconst\nchar    rgbTag[] = VER_FILEDESCRIPTION_STR \"\\0\" VER_PRODUCTVERSION_STR;\n\nextern\nconst\nushort  rgusVer[] = { VER_PRODUCTVERSION };\n\n#define SetBits(a,b,c,d,e,f,g,h,i,j,k,l,m) \\\n    ((1<<a) & (1<<b) & (1<<c) & (1<<d) & (1<<e) & (1<<f) & (1<<g) & \\\n    (1<<h) & (1<<i) & (1<<j) & (1<<k) & (1<<l) & (1<<m))\n\nconst __int32 PDB1::c_mpEcEcBest[] =\n{\n    // Most interesting values are the ones that can be returned from the OpenValidate*\n    // calls.  Priority order is:\n    // \n    // EC_OK\n    // EC_OUT_OF_MEMORY, EC_FILE_SYSTEM\n    // EC_INVALID_AGE\n    // EC_INVALID_SIG\n    // EC_ACCESS_DENIED\n    // EC_FORMAT\n    // EC_DEBUG_INFO_NOT_IN_PDB\n    // EC_DBG_NOT_FOUND\n    // EC_NO_DEBUG_INFO\n    // EC_INVALID_EXE_TIMESTAMP\n    // EC_INVALID_EXECUTABLE\n    // EC_NOT_FOUND\n    //\n    // and they remain stable (i.e. if they are compared to the same error, they return false)\n    //    \n\n    // (EC_OK, *) none are better than EC_OK\n    0,\n    \n    // (EC_USAGE, *), all are better than EC_USAGE\n    0xffffffff,\n    \n    // (EC_OUT_OF_MEMORY, *) hmmm, none better than OOM except OK\n    SetBits(EC_OK, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),\n    \n    // (EC_FILE_SYSTEM, *)\n    SetBits(EC_OK, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),\n    \n    // (EC_NOT_FOUND, *) The interesting one.  Better than not many.\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM, EC_INVALID_AGE,\n        EC_INVALID_SIG, EC_ACCESS_DENIED, EC_FORMAT, EC_DEBUG_INFO_NOT_IN_PDB,\n        EC_DBG_NOT_FOUND, EC_NO_DEBUG_INFO, EC_INVALID_EXE_TIMESTAMP,\n        EC_INVALID_EXECUTABLE, 0),\n\n    // (EC_INVALID_SIG, *) Best one to return in most cases\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM, EC_INVALID_AGE,\n        0, 0, 0, 0, 0, 0, 0, 0, 0),\n\n    // (EC_INVALID_AGE, *) Best one to return in all cases\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM, 0,\n        0, 0, 0, 0, 0, 0, 0, 0, 0),\n\n    // (EC_PRECOMP_REQUIRED, *) n/a\n    0xffffffff,\n\n    // (EC_OUT_OF_TI), *) n/a\n    0xffffffff,\n\n    // (EC_NOT_IMPLEMENTED, *), n/a\n    0xffffffff,\n\n    // (EC_V1_PDB, *), n/a\n    0xffffffff,\n\n    // (EC_FORMAT, *), n/a\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM,EC_INVALID_AGE,\n        EC_INVALID_SIG, EC_ACCESS_DENIED, 0, 0, 0, 0, 0, 0, 0),\n\n    // (EC_LIMIT, *), n/a\n    0xffffffff,\n\n    // (EC_CORRUPT, *) n/a\n    0xffffffff,\n\n    // (EC_TI16, *) n/a\n    0xffffffff,\n\n    // (EC_ACCESS_DENIED, *)\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM,EC_INVALID_AGE,\n        EC_INVALID_SIG, 0, 0, 0, 0, 0, 0, 0, 0),\n\n    // EC_ILLEGAL_TYPE_EDIT\n    0xffffffff,\n\n    // EC_INVALID_EXECUTABLE\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM,EC_INVALID_AGE,\n        EC_INVALID_SIG, EC_ACCESS_DENIED, EC_FORMAT, EC_DEBUG_INFO_NOT_IN_PDB,\n        EC_DBG_NOT_FOUND, EC_NO_DEBUG_INFO, EC_INVALID_EXE_TIMESTAMP,\n        0, 0),\n\n    // EC_DBG_NOT_FOUND,       \n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM,EC_INVALID_AGE,\n        EC_INVALID_SIG, EC_ACCESS_DENIED, EC_FORMAT, EC_DEBUG_INFO_NOT_IN_PDB,\n        0, EC_NO_DEBUG_INFO, 0, 0, 0),\n\n    // EC_NO_DEBUG_INFO,       \n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM,EC_INVALID_AGE,\n        EC_INVALID_SIG, EC_ACCESS_DENIED, EC_FORMAT, EC_DEBUG_INFO_NOT_IN_PDB,\n        EC_DBG_NOT_FOUND, 0, 0, 0, 0),\n\n    // EC_INVALID_EXE_TIMESTAMP\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM,EC_INVALID_AGE,\n        EC_INVALID_SIG, EC_ACCESS_DENIED, EC_FORMAT, EC_DEBUG_INFO_NOT_IN_PDB,\n        EC_DBG_NOT_FOUND, EC_NO_DEBUG_INFO, 0, 0, 0),\n\n    // EC_CORRUPT_TYPEPOOL\n    0xffffffff,\n\n    // EC_DEBUG_INFO_NOT_IN_PDB\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM,EC_INVALID_AGE,\n        EC_INVALID_SIG, EC_ACCESS_DENIED, EC_FORMAT, 0,\n        0, 0, 0, 0, 0),\n\n    // EC_RPC\n    0xffffffff,\n\n    // EC_UNKNOWN\n    0xffffffff,\n\n    // EC_BAD_CACHE_PATH\n    0xffffffff,\n\n    // EC_CACHE_FULL\n    0xffffffff,\n\n    // EC_TOO_MANY_MOD_ADDTYPE\n    0xffffffff,\n\n    // EC_MINI_PDB, same as EC_FORMAT\n    SetBits(EC_OK, EC_OUT_OF_MEMORY, EC_FILE_SYSTEM,EC_INVALID_AGE,\n        EC_INVALID_SIG, EC_ACCESS_DENIED, 0, 0, 0, 0, 0, 0, 0),\n};\n\n#undef SetBits\n\nextern const long  cbPgPdbDef;      // defined in pdbcommon.cpp\n\nBOOL PDB::ExportValidateInterface(INTV intv_)\n{\n    return PDB1::ExportValidateInterface(intv_);\n}\n\nBOOL PDB::ExportValidateImplementation(IMPV impv_)\n{\n    return PDB1::ExportValidateImplementation(impv_);\n}\n\nINTV PDB::QueryInterfaceVersionStatic()\n{\n    return PDB1::QueryInterfaceVersionStatic();\n}\n\nIMPV PDB::QueryImplementationVersionStatic()\n{\n    return PDB1::QueryImplementationVersionStatic();\n}\n\nINTV PDB1::QueryInterfaceVersion()\n{\n    PDBLOG_FUNC();\n    return intv;\n}\n\nIMPV PDB1::QueryImplementationVersion()\n{\n    PDBLOG_FUNC();\n    return impv;\n}\n\nIMPV PDB1::QueryPdbImplementationVersion()\n{\n    PDBLOG_FUNC();\n    MTS_PROTECT(m_csPdbStream);\n\n    return pdbStream.impv;\n}\n\n//////////////////////////////////////////////////////////////////////////////\n// Program Database API Implementation\n\nBOOL PDB::Open2W(const wchar_t *wszPDB, const char *szMode, OUT EC *pec,\n       __out_ecount_opt(cchErrMax) wchar_t *wszError, size_t cchErrMax, OUT PDB **pppdb)\n{\n    PDBLOG_FUNC();\n    dassert(wszPDB);\n    dassert(szMode);\n    dassert(pec);\n    dassert(pppdb);\n    return PDB1::Open2W(wszPDB, szMode, pec, wszError, cchErrMax, pppdb);\n}\n\nBOOL PDB::OpenEx2W(const wchar_t *wszPDB, const char *szMode, long cbPage,\n       OUT EC *pec,  __out_ecount_opt(cchErrMax) wchar_t *wszError, size_t cchErrMax, OUT PDB **pppdb)\n{\n    PDBLOG_FUNC();\n    dassert(wszPDB);\n    dassert(szMode);\n    dassert(pec);\n    dassert(pppdb);\n\n    return PDB1::OpenEx2W(wszPDB, szMode, (SIG) 0, cbPage, pec, wszError, cchErrMax, pppdb);\n}\n\nBOOL PDB::OpenValidate4(const wchar_t *wszPDB, const char *szMode,\n       PCSIG70 pcsig70, SIG sig, AGE age, OUT EC *pec,\n        __out_ecount_opt(cchErrMax) wchar_t *wszError, size_t cchErrMax, OUT PDB **pppdb)\n{\n    PDBLOG_FUNC();\n    dassert(wszPDB);\n    dassert(szMode);\n    dassert(pppdb);\n\n    return PDB1::OpenValidate4(wszPDB, szMode, pcsig70, sig, age, pec, wszError, cchErrMax, pppdb);\n}\n\nBOOL PDB::OpenNgenPdb(const wchar_t *wszNgenImage, const wchar_t *wszPdbPath,\n        OUT EC *pec, __out_ecount_opt(cchErrMax) wchar_t *wszError, size_t cchErrMax, OUT PDB **pppdb)\n{\n    PDBLOG_FUNC();\n    dassert(wszNgenImage);\n    dassert(wszPdbPath);\n    dassert(pppdb);\n\n    return PDB1::OpenNgenPdb(wszNgenImage, wszPdbPath, pec, wszError, cchErrMax, pppdb);\n}\n\nBOOL PDB::OpenValidate5(const wchar_t *wszExecutable,\n       const wchar_t *wszSearchPath, void *pvClient,\n       PfnPDBQueryCallback pfnQueryCallback, OUT EC *pec,\n        __out_ecount_opt(cchErrMax) wchar_t *wszError, size_t cchErrMax, OUT PDB **pppdb)\n{\n    PDBLOG_FUNC();\n    dassert(wszExecutable);\n    dassert(pec);\n    dassert(pppdb);\n\n    return PDB1::OpenValidate5(wszExecutable, wszSearchPath, pvClient, pfnQueryCallback, pec, wszError, cchErrMax, pppdb);\n}\n\nBOOL PDB::OpenInStream(IStream *pIStream, const char *szMode, OUT EC *pec,\n        __out_ecount_opt(cchErrMax) wchar_t *wszError, size_t cchErrMax, OUT PDB **pppdb)\n{\n    PDBLOG_FUNC();\n    dassert(pIStream);\n    dassert(pec);\n    dassert(pppdb);\n\n#ifdef SMALLPAGES\n    return PDB1::OpenInStream(pIStream, szMode, 512, pec, wszError, cchErrMax, pppdb);\n#else\n    return PDB1::OpenInStream(pIStream, szMode, ::cbPgPdbDef, pec, wszError, cchErrMax, pppdb);\n#endif\n}\n\nstatic const EC xlateMsfEc[MSF_EC_MAX] = {\n\n[Showing lines 1-300 of 3756. Use :301 to continue. Read artifact://715 for full output]"}],"details":{"kind":"url","url":"https://raw.githubusercontent.com/microsoft/microsoft-pdb/master/PDB/dbi/pdb.cpp","finalUrl":"https://raw.githubusercontent.com/microsoft/microsoft-pdb/master/PDB/dbi/pdb.cpp","contentType":"text/plain","method":"text","truncated":true,"notes":[],"meta":{"source":{"type":"url","value":"https://raw.githubusercontent.com/microsoft/microsoft-pdb/master/PDB/dbi/pdb.cpp"},"truncation":{"direction":"head","truncatedBy":"lines","totalLines":3756,"totalBytes":101386,"outputLines":300,"outputBytes":8265,"shownRange":{"start":1,"end":300},"artifactId":"715","nextOffset":301}}},"isError":false,"timestamp":1789544137887}}
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{"type":"message","id":"699d1b16","parentId":"01d13920","timestamp":"2026-09-16T07:35:47.787Z","message":{"role":"toolResult","toolCallId":"call_AKqcXpFR76EI9gAyM20NRNMd|fc_0b35c61c3c988ca2016aaa46d219c887d1997b06cb19fe70ac","toolName":"grep","content":[{"type":"text","text":" 602|                    // Starting with VC60, ages count from 1 instead of 0\n*603|                    // (VC50 pdb's have an age of 0 in their dbi header. In order\n 604|                    // to be able to read such pdbs without using the enhanced VC60\n 605|                    // validation scheme, we reserve 0 as a special age value\n 606|                    // and start counting from 1)\n 607|\n*608|                    ppdb1->pdbStream.age = 1;\n 609|\n 610|                    // \"Claim\" the snPDB stream as the \"semaphore\" that\n 611|                    // the PDB exists and has valid PDB-stuff in it.\n...\n 771|            // Starting with VC60, ages count from 1 instead of 0\n*772|            // (VC50 pdb's have an age of 0 in their dbi header. In order\n 773|            // to be able to read such pdbs without using the enhanced VC60\n 774|            // validation scheme, we reserve 0 as a special age value\n 775|            // and start counting from 1)\n 776|\n*777|            ppdb1->pdbStream.age = 1;\n 778|\n 779|            // \"Claim\" the snPDB stream as the \"semaphore\" that\n 780|            // the PDB exists and has valid PDB-stuff in it.\n...\n 846|\n*847|    if (age > ppdb->QueryAge()) {\n 848|        ppdb->Close();\n 849|        setError(pec, EC_INVALID_AGE, wszError, cchErrMax, wszPDB);\n 850|\n...\n 860|        // For an acceptable match the PDB age should be greater than or equal to the image age,\n*861|        // and the DBI age should be equal to the image age. Old pdb files may have a DBI age\n 862|        // of 0; in such a case no additional validation is performed\n 863|\n 864|        DBI *pdbi;\n...\n 872|\n*873|        AGE ageT = pdbi->QueryAge();\n 874|\n 875|        pdbi->Close();\n 876|\n*877|        if ((ageT != 0) && (ageT != age)) {\n 878|            ppdb->Close();\n 879|            setError(pec, EC_INVALID_AGE, wszError, cchErrMax, wszPDB);\n 880|\n...\n 915|\n*916|    if (!locator.FGetNgenPdbInfo(wszNgenImage, &wszPdb, &psig70, &age)) {\n 917|        setError(pec, locator.Ec(), wszError, cchErrMax, locator.WszError());\n 918|        return FALSE;\n 919|    }\n...\n 949|    memcpy(&ppdb1->pdbStream.sig70, psig70, sizeof(SIG70));\n*950|    ppdb1->pdbStream.age = age;\n 951|\n 952|    *pppdb = ppdb;\n 953|\n...\n 1376|\n*1377|AGE PDB1::QueryAge()\n 1378|{\n 1379|    PDBLOG_FUNC();\n 1380|    MTS_PROTECT(m_csPdbStream);\n...\n 2272|\n*2273|        bool fNonComdat = ((dwCharacteristics & IMAGE_SCN_LNK_COMDAT) == 0);\n 2274|\n 2275|        if (fNonComdat) {\n 2276|            if (!mpImodSeenNonComdat.add(imod, 0)) {\n...\n 3014|            wchar_t  szFullMapped[_MAX_PATH];\n*3015|            const wchar_t *szTS = ((DBI1 *) pdbiOut)->szGetTsInfo(ptype, szTmp, szFullMapped, &sig70, &age);\n 3016|\n 3017|            pfnReportMissingPDB(pvClientContext, szTS);\n 3018|\n...\n 3297|\n*3298|        AGE ageDbi = pdbiIn->QueryAge();\n 3299|\n 3300|        pdbiIn->Close();\n 3301|\n...\n 3321|                SIG     sig = QuerySignature();\n*3322|                AGE     age = QueryAge();\n 3323|                SIG70   sig70 = {0};\n 3324|\n 3325|                QuerySignature2(&sig70);\n 3326|\n*3327|                fRet &= patchSigAndAge(wszPdbOut, sig, sig70, age, ageDbi, fRemovePrivate);\n 3328|            }\n 3329|        }\n 3330|    }\n...\n 3338|\n*3339|BOOL PDB1::patchSigAndAge(const wchar_t *wszPDB, SIG sig, const SIG70 & sig70, AGE age, AGE ageDbi, bool fStripped)\n 3340|{\n 3341|\n 3342|    EC ec;\n...\n 3363|    ppdb1->pdbStream.sig = sig;\n*3364|    ppdb1->pdbStream.age = age;\n 3365|    ppdb1->pdbStream.sig70 = sig70;\n 3366|\n*3367|    // Patch the new dbi age into the snDbi stream, update fStripped\n 3368|    //\n 3369|    MSF *pmsfOut = ppdb1->pmsf;\n 3370|\n...\n 3379|\n*3380|    dbihdr.age = ageDbi;\n 3381|    dbihdr.flags.fStripped = fStripped;\n 3382|\n 3383|    if (!pmsfOut->WriteStream(snDbi, 0, &dbihdr, sizeof(dbihdr)) ||\n...\n 3668|{\n*3669|    PDBTimeoutManager *pThis = reinterpret_cast<PDBTimeoutManager *>(p);\n 3670|    return pThis->CleanupThread();\n 3671|}\n 3672|"}],"details":{"scopePath":"C:/Users/decid/.omp/agent/sessions/-Documents-projects-spt-core/2026-09-13T10-23-45-921Z_01a09a4b-5f01-7000-9118-23ce74a49636/715.read.log","searchPath":"C:/Users/decid/.omp/agent/sessions/-Documents-projects-spt-core/2026-09-13T10-23-45-921Z_01a09a4b-5f01-7000-9118-23ce74a49636/715.read.log","cwd":"C:\\Users\\decid\\Documents\\projects\\spt-core","matchCount":21,"fileCount":1,"files":["C:/Users/decid/.omp/agent/sessions/-Documents-projects-spt-core/2026-09-13T10-23-45-921Z_01a09a4b-5f01-7000-9118-23ce74a49636/715.read.log"],"fileMatches":[{"path":"C:/Users/decid/.omp/agent/sessions/-Documents-projects-spt-core/2026-09-13T10-23-45-921Z_01a09a4b-5f01-7000-9118-23ce74a49636/715.read.log","count":21}],"truncated":false,"displayContent":"  602│                    // Starting with VC60, ages count from 1 instead of 0\n *603│                    // (VC50 pdb's have an age of 0 in their dbi header. In order\n  604│                    // to be able to read such pdbs without using the enhanced VC60\n  605│                    // validation scheme, we reserve 0 as a special age value\n  606│                    // and start counting from 1)\n  607│\n *608│                    ppdb1->pdbStream.age = 1;\n  609│\n  610│                    // \"Claim\" the snPDB stream as the \"semaphore\" that\n  611│                    // the PDB exists and has valid PDB-stuff in it.\n     │...\n  771│            // Starting with VC60, ages count from 1 instead of 0\n *772│            // (VC50 pdb's have an age of 0 in their dbi header. In order\n  773│            // to be able to read such pdbs without using the enhanced VC60\n  774│            // validation scheme, we reserve 0 as a special age value\n  775│            // and start counting from 1)\n  776│\n *777│            ppdb1->pdbStream.age = 1;\n  778│\n  779│            // \"Claim\" the snPDB stream as the \"semaphore\" that\n  780│            // the PDB exists and has valid PDB-stuff in it.\n     │...\n  846│\n *847│    if (age > ppdb->QueryAge()) {\n  848│        ppdb->Close();\n  849│        setError(pec, EC_INVALID_AGE, wszError, cchErrMax, wszPDB);\n  850│\n     │...\n  860│        // For an acceptable match the PDB age should be greater than or equal to the image age,\n *861│        // and the DBI age should be equal to the image age. Old pdb files may have a DBI age\n  862│        // of 0; in such a case no additional validation is performed\n  863│\n  864│        DBI *pdbi;\n     │...\n  872│\n *873│        AGE ageT = pdbi->QueryAge();\n  874│\n  875│        pdbi->Close();\n  876│\n *877│        if ((ageT != 0) && (ageT != age)) {\n  878│            ppdb->Close();\n  879│            setError(pec, EC_INVALID_AGE, wszError, cchErrMax, wszPDB);\n  880│\n     │...\n  915│\n *916│    if (!locator.FGetNgenPdbInfo(wszNgenImage, &wszPdb, &psig70, &age)) {\n  917│        setError(pec, locator.Ec(), wszError, cchErrMax, locator.WszError());\n  918│        return FALSE;\n  919│    }\n     │...\n  949│    memcpy(&ppdb1->pdbStream.sig70, psig70, sizeof(SIG70));\n *950│    ppdb1->pdbStream.age = age;\n  951│\n  952│    *pppdb = ppdb;\n  953│\n     │...\n 1376│\n*1377│AGE PDB1::QueryAge()\n 1378│{\n 1379│    PDBLOG_FUNC();\n 1380│    MTS_PROTECT(m_csPdbStream);\n     │...\n 2272│\n*2273│        bool fNonComdat = ((dwCharacteristics & IMAGE_SCN_LNK_COMDAT) == 0);\n 2274│\n 2275│        if (fNonComdat) {\n 2276│            if (!mpImodSeenNonComdat.add(imod, 0)) {\n     │...\n 3014│            wchar_t  szFullMapped[_MAX_PATH];\n*3015│            const wchar_t *szTS = ((DBI1 *) pdbiOut)->szGetTsInfo(ptype, szTmp, szFullMapped, &sig70, &age);\n 3016│\n 3017│            pfnReportMissingPDB(pvClientContext, szTS);\n 3018│\n     │...\n 3297│\n*3298│        AGE ageDbi = pdbiIn->QueryAge();\n 3299│\n 3300│        pdbiIn->Close();\n 3301│\n     │...\n 3321│                SIG     sig = QuerySignature();\n*3322│                AGE     age = QueryAge();\n 3323│                SIG70   sig70 = {0};\n 3324│\n 3325│                QuerySignature2(&sig70);\n 3326│\n*3327│                fRet &= patchSigAndAge(wszPdbOut, sig, sig70, age, ageDbi, fRemovePrivate);\n 3328│            }\n 3329│        }\n 3330│    }\n     │...\n 3338│\n*3339│BOOL PDB1::patchSigAndAge(const wchar_t *wszPDB, SIG sig, const SIG70 & sig70, AGE age, AGE ageDbi, bool fStripped)\n 3340│{\n 3341│\n 3342│    EC ec;\n     │...\n 3363│    ppdb1->pdbStream.sig = sig;\n*3364│    ppdb1->pdbStream.age = age;\n 3365│    ppdb1->pdbStream.sig70 = sig70;\n 3366│\n*3367│    // Patch the new dbi age into the snDbi stream, update fStripped\n 3368│    //\n 3369│    MSF *pmsfOut = ppdb1->pmsf;\n 3370│\n     │...\n 3379│\n*3380│    dbihdr.age = ageDbi;\n 3381│    dbihdr.flags.fStripped = fStripped;\n 3382│\n 3383│    if (!pmsfOut->WriteStream(snDbi, 0, &dbihdr, sizeof(dbihdr)) ||\n     │...\n 3668│{\n*3669│    PDBTimeoutManager *pThis = reinterpret_cast<PDBTimeoutManager *>(p);\n 3670│    return pThis->CleanupThread();\n 3671│}\n 3672│"},"isError":false,"timestamp":1789544147787}}
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{"type":"message","id":"e450e69a","parentId":"cb6a5988","timestamp":"2026-09-16T07:36:02.563Z","message":{"role":"toolResult","toolCallId":"call_dF8JsVFlCaMZ0qa9DrXHXSFs|fc_0b35c61c3c988ca2016aaa46e1a1ec87d1940d09d517cbf82e","toolName":"read","content":[{"type":"text","text":"                setError(pec, EC_FILE_SYSTEM, wszError, cchErrMax, L\"\");\n                return FALSE;\n            }\n\n            ppdb1->m_fContainIDStream = true;\n        }\n\n        if (!ppdb1->Commit()) {\n            *pec = ppdb1->QueryLastErrorExW(wszError, cchErrMax);\n            return FALSE;\n        }\n    }\n\n    *pppdb = ppdb1;\n\n    return TRUE;\n}\n\nBOOL PDB1::OpenValidate4(const wchar_t *wszPDB, const char *szMode,\n       PCSIG70 pcsig70, SIG sig, AGE age, OUT EC *pec,\n        __out_ecount_opt(cchErrMax) wchar_t *wszError, size_t cchErrMax, OUT PDB **pppdb)\n{\n    PDBLOG_FUNC();\n    dassert(wszPDB);\n    dassert(szMode);\n    dassert(pec);\n    dassert(pppdb);\n\n    *pppdb = NULL;\n\n    PDB *ppdb;\n\n    if (!OpenEx2W(wszPDB, szMode, (SIG) 0, cbMsfPageDefault, pec, wszError, cchErrMax, &ppdb)) {\n        return FALSE;\n    }\n\n    if ((pcsig70 != NULL) && IsRealSig70(*pcsig70)) {\n        SIG70 sig70;\n\n        if (!ppdb->QuerySignature2(&sig70) || !IsEqualGUID(*pcsig70, sig70)) {\n            ppdb->Close();\n            setError(pec, EC_INVALID_SIG, wszError, cchErrMax, wszPDB);\n\n            return FALSE;\n        }\n    }\n    else {\n        if (pcsig70 != NULL && sig == 0)\n            sig = SigFromSig70(*pcsig70);\n\n        if (ppdb->QuerySignature() != sig) {\n            ppdb->Close();\n            setError(pec, EC_INVALID_SIG, wszError, cchErrMax, wszPDB);\n\n            return FALSE;\n        }\n    }\n\n    if (age > ppdb->QueryAge()) {\n        ppdb->Close();\n        setError(pec, EC_INVALID_AGE, wszError, cchErrMax, wszPDB);\n\n        return FALSE;\n    }\n\n    // If we open just in order to read types, we are done.\n    // (In this case we need not validate the DBI stream)\n\n    BOOL fGetRecordsOnly = strchr(szMode, 'c') != 0;\n\n    if (!fGetRecordsOnly) {\n        // For an acceptable match the PDB age should be greater than or equal to the image age,\n        // and the DBI age should be equal to the image age. Old pdb files may have a DBI age\n        // of 0; in such a case no additional validation is performed\n\n        DBI *pdbi;\n\n        if (!ppdb->OpenDBI(NULL, pdbRead, &pdbi)) {\n            ppdb->Close();\n            setError(pec, EC_INVALID_SIG, wszError, cchErrMax, wszPDB);\n\n            return FALSE;\n        }\n\n        AGE ageT = pdbi->QueryAge();\n\n        pdbi->Close();\n\n        if ((ageT != 0) && (ageT != age)) {\n            ppdb->Close();\n            setError(pec, EC_INVALID_AGE, wszError, cchErrMax, wszPDB);\n\n            return FALSE;\n        }\n    }\n\n    *pppdb = ppdb;\n\n    return TRUE;\n}\n\n\n[Artifact storage: ~/.omp/agent/sessions/-Documents-projects-spt-core/2026-09-13T10-23-45-921Z_01a09a4b-5f01-7000-9118-23ce74a49636/715.read.log (99.0KB). Use artifact://715:N-M to page, artifact://715:raw:N-M for verbatim chunks, and the artifact file path for search/copy workflows.]\n\n[Showing lines 789-889 of 3756. Use :890 to continue]"}],"details":{"resolvedPath":"C:\\Users\\decid\\.omp\\agent\\sessions\\-Documents-projects-spt-core\\2026-09-13T10-23-45-921Z_01a09a4b-5f01-7000-9118-23ce74a49636\\715.read.log","contentType":"text/plain","totalLines":3756,"displayContent":{"text":"                setError(pec, EC_FILE_SYSTEM, wszError, cchErrMax, L\"\");\n                return FALSE;\n            }\n\n            ppdb1->m_fContainIDStream = true;\n        }\n\n        if (!ppdb1->Commit()) {\n            *pec = ppdb1->QueryLastErrorExW(wszError, cchErrMax);\n            return FALSE;\n        }\n    }\n\n    *pppdb = ppdb1;\n\n    return TRUE;\n}\n\nBOOL PDB1::OpenValidate4(const wchar_t *wszPDB, const char *szMode,\n       PCSIG70 pcsig70, SIG sig, AGE age, OUT EC *pec,\n        __out_ecount_opt(cchErrMax) wchar_t *wszError, size_t cchErrMax, OUT PDB **pppdb)\n{\n    PDBLOG_FUNC();\n    dassert(wszPDB);\n    dassert(szMode);\n    dassert(pec);\n    dassert(pppdb);\n\n    *pppdb = NULL;\n\n    PDB *ppdb;\n\n    if (!OpenEx2W(wszPDB, szMode, (SIG) 0, cbMsfPageDefault, pec, wszError, cchErrMax, &ppdb)) {\n        return FALSE;\n    }\n\n    if ((pcsig70 != NULL) && IsRealSig70(*pcsig70)) {\n        SIG70 sig70;\n\n        if (!ppdb->QuerySignature2(&sig70) || !IsEqualGUID(*pcsig70, sig70)) {\n            ppdb->Close();\n            setError(pec, EC_INVALID_SIG, wszError, cchErrMax, wszPDB);\n\n            return FALSE;\n        }\n    }\n    else {\n        if (pcsig70 != NULL && sig == 0)\n            sig = SigFromSig70(*pcsig70);\n\n        if (ppdb->QuerySignature() != sig) {\n            ppdb->Close();\n            setError(pec, EC_INVALID_SIG, wszError, cchErrMax, wszPDB);\n\n            return FALSE;\n        }\n    }\n\n    if (age > ppdb->QueryAge()) {\n        ppdb->Close();\n        setError(pec, EC_INVALID_AGE, wszError, cchErrMax, wszPDB);\n\n        return FALSE;\n    }\n\n    // If we open just in order to read types, we are done.\n    // (In this case we need not validate the DBI stream)\n\n    BOOL fGetRecordsOnly = strchr(szMode, 'c') != 0;\n\n    if (!fGetRecordsOnly) {\n        // For an acceptable match the PDB age should be greater than or equal to the image age,\n        // and the DBI age should be equal to the image age. 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{"type":"message","id":"a89d30bc","parentId":"98e2eb32","timestamp":"2026-09-16T07:36:38.532Z","message":{"role":"assistant","content":[{"type":"toolCall","id":"call_W6oNOMCqIkHUCIESfPP1E5qA|fc_0b35c61c3c988ca2016aaa47061ca887d1ab1d83ba47bfae30","name":"read","arguments":{"i":"Reading symbol preparation parser","path":".spt/preserved/302/symbols/prepare_symbols.py:13-23,95-133,174-202"},"intent":"Reading symbol preparation parser"}],"api":"openai-codex-responses","provider":"openai-codex","model":"gpt-6-astra","usage":{"input":666,"output":49,"cacheRead":56320,"cacheWrite":0,"totalTokens":57035,"cost":{"input":0.00666,"output":0.00245,"cacheRead":0.056319999999999995,"cacheWrite":0,"total":0.06542999999999999}},"stopReason":"toolUse","timestamp":1789544183327,"responseId":"resp_0b35c61c3c988ca2016aaa46f7bde087d1a5c4be1520975978","providerPayload":{"type":"openaiResponsesHistory","provider":"openai-codex","dt":true,"items":[{"id":"fc_0b35c61c3c988ca2016aaa47061ca887d1ab1d83ba47bfae30","type":"function_call","status":"completed","arguments":"{\"i\":\"Reading symbol preparation parser\",\"path\":\".spt/preserved/302/symbols/prepare_symbols.py:13-23,95-133,174-202\"}","call_id":"call_W6oNOMCqIkHUCIESfPP1E5qA","internal_chat_message_metadata_passthrough":{"create_time":1789544184.178671,"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"},"name":"read","metadata":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"}}]},"duration":15203.794300001115,"ttft":14805.75339999795,"completedAt":1789544198531,"contextSnapshot":{"promptTokens":56986,"nonMessageTokens":16994,"compactionEpoch":0}}}
{"type":"message","id":"41528479","parentId":"a89d30bc","timestamp":"2026-09-16T07:36:38.538Z","message":{"role":"toolResult","toolCallId":"call_W6oNOMCqIkHUCIESfPP1E5qA|fc_0b35c61c3c988ca2016aaa47061ca887d1ab1d83ba47bfae30","toolName":"read","content":[{"type":"text","text":"[.spt/preserved/302/symbols/prepare_symbols.py#9E4A]\n13:ROOT = Path(__file__).resolve().parent\n14:STACKS = ROOT.parent / \"todlando-windows/forced-1/analysis/stacks.jsonl\"\n15:SERVER = \"https://msdl.microsoft.com/download/symbols\"\n16:SOURCES = [\n17:    \"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv\",\n18:    \"https://learn.microsoft.com/en-us/windows/win32/debug/pe-format\",\n19:    \"https://llvm.org/docs/PDB/MsfFile.html\",\n20:    \"https://llvm.org/docs/PDB/PdbStream.html\",\n21:]\n22:\n23:\n…\n93:def pdb_identity(data):\n94:    if take(data, 0, 32) != b\"Microsoft C/C++ MSF 7.00\\r\\n\\x1aDS\\0\\0\\0\":\n95:        raise ValueError(\"Unsupported PDB container (expected MSF 7)\")\n96:    block_size, _, blocks, directory_size, _, block_map = unpack(\"<6I\", data, 32)\n97:    if block_size not in (512, 1024, 2048, 4096) or blocks * block_size != len(data):\n98:        raise ValueError(\"Invalid MSF block geometry\")\n99:    directory_count = (directory_size + block_size - 1) // block_size\n100:    if directory_count * 4 > block_size:\n101:        raise ValueError(\"Unsupported multi-block MSF directory map\")\n102:    directory_blocks = unpack(f\"<{directory_count}I\", data, block_map * block_size)\n103:    directory = b\"\".join(take(data, b * block_size, block_size) for b in directory_blocks)[:directory_size]\n104:    stream_count, = unpack(\"<I\", directory, 0)\n105:    if stream_count < 2:\n106:        raise ValueError(\"PDB info stream missing\")\n107:    sizes = unpack(f\"<{stream_count}I\", directory, 4)\n108:    cursor = 4 + stream_count * 4\n109:    for index, size in enumerate(sizes[:2]):\n110:        if size == 0xffffffff:\n111:            if index == 1:\n112:                raise ValueError(\"PDB info stream absent\")\n113:            continue\n114:        count = (size + block_size - 1) // block_size\n115:        stream_blocks = unpack(f\"<{count}I\", directory, cursor)\n116:        cursor += count * 4\n117:        if index == 1:\n118:            info = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n119:            version, signature, age = unpack(\"<III\", info, 0)\n120:            guid = uuid.UUID(bytes_le=take(info, 12, 16))\n121:            return {\"guid\": str(guid).upper(), \"age\": age, \"version\": version, \"signature\": signature}\n122:    raise ValueError(\"PDB info stream not decoded\")\n123:\n124:\n125:def map_recorded_pcs(pcs):\n126:    kernel = ctypes.WinDLL(\"kernel32\", use_last_error=True)\n127:    kernel.GetModuleHandleExW.argtypes = [ctypes.c_ulong, ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p)]\n128:    kernel.GetModuleHandleExW.restype = ctypes.c_int\n129:    kernel.GetModuleFileNameW.argtypes = [ctypes.c_void_p, ctypes.c_wchar_p, ctypes.c_ulong]\n130:    kernel.GetModuleFileNameW.restype = ctypes.c_ulong\n131:    modules = {}\n132:    for pc in sorted(pcs):\n133:        module = ctypes.c_void_p()\n…\n146:        entry[\"recorded_pcs\"].append({\"pc\": hex(pc), \"rva\": hex(pc - module.value)})\n147:    return list(modules.values())\n…\n150:def prepare_module(entry):\n151:    dll_data = Path(entry[\"dll_path\"]).read_bytes()\n…\n160:    if target.exists():\n…\n163:    else:\n164:        start = time.monotonic()\n…\n166:        with urllib.request.urlopen(request, timeout=30) as response:\n167:            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl()})\n…\n170:            while True:\n171:                chunk = response.read(1024 * 1024)\n…\n174:                chunks.append(chunk)\n175:                size += len(chunk)\n176:                if size > 64 * 1024 * 1024 or time.monotonic() - start > 120:\n177:                    raise ValueError(\"Download exceeds finite size/time bound\")\n178:            data = b\"\".join(chunks)\n179:        entry[\"acquisition\"] = \"downloaded\"\n180:    identity = pdb_identity(data)\n181:    entry[\"pdb_identity\"] = identity\n182:    if (identity[\"guid\"], identity[\"age\"]) != (cv[\"guid\"], cv[\"age\"]):\n183:        raise ValueError(\"Downloaded PDB GUID+age does not match DLL CodeView\")\n184:    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True})\n185:    target.parent.mkdir(parents=True, exist_ok=True)\n186:    if not target.exists():\n187:        target.write_bytes(data)\n188:    flat = ROOT / \"flat\" / cv[\"name\"]\n189:    flat.parent.mkdir(parents=True, exist_ok=True)\n190:    if flat.exists():\n191:        if sha256(flat.read_bytes()) != entry[\"pdb_sha256\"]:\n192:            raise ValueError(f\"Different PDB already occupies flat path: {flat}\")\n193:        entry[\"flat_staging\"] = \"existing-revalidated\"\n194:    else:\n195:        os.link(target, flat)\n196:        entry[\"flat_staging\"] = \"hardlink\"\n197:    entry.update({\"flat_path\": str(flat), \"flat_sha256\": sha256(flat.read_bytes()), \"status\": \"prepared\"})\n198:\n199:\n200:def main():\n201:    receipt = {\n202:        \"started_utc\": datetime.datetime.now(datetime.timezone.utc).isoformat(),\n…\n213:    }\n…\n237:    return 0 if receipt[\"status\"] == \"prepared\" else 1"}],"details":{"displayContent":{"text":"ROOT = Path(__file__).resolve().parent\nSTACKS = ROOT.parent / \"todlando-windows/forced-1/analysis/stacks.jsonl\"\nSERVER = \"https://msdl.microsoft.com/download/symbols\"\nSOURCES = [\n    \"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv\",\n    \"https://learn.microsoft.com/en-us/windows/win32/debug/pe-format\",\n    \"https://llvm.org/docs/PDB/MsfFile.html\",\n    \"https://llvm.org/docs/PDB/PdbStream.html\",\n]\n\n\n…\ndef pdb_identity(data):\n    if take(data, 0, 32) != b\"Microsoft C/C++ MSF 7.00\\r\\n\\x1aDS\\0\\0\\0\":\n        raise ValueError(\"Unsupported PDB container (expected MSF 7)\")\n    block_size, _, blocks, directory_size, _, block_map = unpack(\"<6I\", data, 32)\n    if block_size not in (512, 1024, 2048, 4096) or blocks * block_size != len(data):\n        raise ValueError(\"Invalid MSF block geometry\")\n    directory_count = (directory_size + block_size - 1) // block_size\n    if directory_count * 4 > block_size:\n        raise ValueError(\"Unsupported multi-block MSF directory map\")\n    directory_blocks = unpack(f\"<{directory_count}I\", data, block_map * block_size)\n    directory = b\"\".join(take(data, b * block_size, block_size) for b in directory_blocks)[:directory_size]\n    stream_count, = unpack(\"<I\", directory, 0)\n    if stream_count < 2:\n        raise ValueError(\"PDB info stream missing\")\n    sizes = unpack(f\"<{stream_count}I\", directory, 4)\n    cursor = 4 + stream_count * 4\n    for index, size in enumerate(sizes[:2]):\n        if size == 0xffffffff:\n            if index == 1:\n                raise ValueError(\"PDB info stream absent\")\n            continue\n        count = (size + block_size - 1) // block_size\n        stream_blocks = unpack(f\"<{count}I\", directory, cursor)\n        cursor += count * 4\n        if index == 1:\n            info = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n            version, signature, age = unpack(\"<III\", info, 0)\n            guid = uuid.UUID(bytes_le=take(info, 12, 16))\n            return {\"guid\": str(guid).upper(), \"age\": age, \"version\": version, \"signature\": signature}\n    raise ValueError(\"PDB info stream not decoded\")\n\n\ndef map_recorded_pcs(pcs):\n    kernel = ctypes.WinDLL(\"kernel32\", use_last_error=True)\n    kernel.GetModuleHandleExW.argtypes = [ctypes.c_ulong, ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p)]\n    kernel.GetModuleHandleExW.restype = ctypes.c_int\n    kernel.GetModuleFileNameW.argtypes = [ctypes.c_void_p, ctypes.c_wchar_p, ctypes.c_ulong]\n    kernel.GetModuleFileNameW.restype = ctypes.c_ulong\n    modules = {}\n    for pc in sorted(pcs):\n        module = ctypes.c_void_p()\n…\n        entry[\"recorded_pcs\"].append({\"pc\": hex(pc), \"rva\": hex(pc - module.value)})\n    return list(modules.values())\n…\ndef prepare_module(entry):\n    dll_data = Path(entry[\"dll_path\"]).read_bytes()\n…\n    if target.exists():\n…\n    else:\n        start = time.monotonic()\n…\n        with urllib.request.urlopen(request, timeout=30) as response:\n            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl()})\n…\n            while True:\n                chunk = response.read(1024 * 1024)\n…\n                chunks.append(chunk)\n                size += len(chunk)\n                if size > 64 * 1024 * 1024 or time.monotonic() - start > 120:\n                    raise ValueError(\"Download exceeds finite size/time bound\")\n            data = b\"\".join(chunks)\n        entry[\"acquisition\"] = \"downloaded\"\n    identity = pdb_identity(data)\n    entry[\"pdb_identity\"] = identity\n    if (identity[\"guid\"], identity[\"age\"]) != (cv[\"guid\"], cv[\"age\"]):\n        raise ValueError(\"Downloaded PDB GUID+age does not match DLL CodeView\")\n    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True})\n    target.parent.mkdir(parents=True, exist_ok=True)\n    if not target.exists():\n        target.write_bytes(data)\n    flat = ROOT / \"flat\" / cv[\"name\"]\n    flat.parent.mkdir(parents=True, exist_ok=True)\n    if flat.exists():\n        if sha256(flat.read_bytes()) != entry[\"pdb_sha256\"]:\n            raise ValueError(f\"Different PDB already occupies flat path: {flat}\")\n        entry[\"flat_staging\"] = \"existing-revalidated\"\n    else:\n        os.link(target, flat)\n        entry[\"flat_staging\"] = \"hardlink\"\n    entry.update({\"flat_path\": str(flat), \"flat_sha256\": sha256(flat.read_bytes()), \"status\": \"prepared\"})\n\n\ndef main():\n    receipt = {\n        \"started_utc\": datetime.datetime.now(datetime.timezone.utc).isoformat(),\n…\n    }\n…\n    return 0 if receipt[\"status\"] == \"prepared\" else 1","startLine":13,"lineNumbers":[13,14,15,16,17,18,19,20,21,22,23,null,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,null,146,147,null,150,151,null,160,null,163,164,null,166,167,null,170,171,null,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,null,213,null,237]},"fileSize":12549,"meta":{"source":{"type":"path","value":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.spt\\preserved\\302\\symbols\\prepare_symbols.py"}}},"isError":false,"timestamp":1789544198537}}
{"type":"custom","customType":"tool_execution_start","data":{"toolCallId":"call_wb0Fb3sTnoyvtzsojfL2C9ez|ctc_0b7dfeb5677134ec016aaa470aa3cc87d28403e2f4ad61a3f2","toolName":"edit","startedAt":"2026-09-16T07:37:00.922Z"},"id":"fc27b8c4","parentId":"41528479","timestamp":"2026-09-16T07:37:00.922Z"}
{"type":"message","id":"ba0fa89c","parentId":"fc27b8c4","timestamp":"2026-09-16T07:37:00.922Z","message":{"role":"assistant","content":[{"type":"toolCall","id":"call_wb0Fb3sTnoyvtzsojfL2C9ez|ctc_0b7dfeb5677134ec016aaa470aa3cc87d28403e2f4ad61a3f2","name":"edit","arguments":{"input":"*** Begin Patch\n[.spt/preserved/302/symbols/prepare_symbols.py#9E4A]\nPUT >20:\n+    \"https://llvm.org/docs/PDB/DbiStream.html\",\n+    \"https://github.com/microsoft/microsoft-pdb/blob/master/PDB/dbi/pdb.cpp#L808-L882\",\nPUT 105.=106:\n+    if stream_count < 4:\n+        raise ValueError(\"PDB info or DBI stream missing\")\nPUT 109.=113:\n+    streams = {}\n+    for index, size in enumerate(sizes[:4]):\n+        if size == 0xffffffff:\n+            if index in (1, 3):\n+                raise ValueError(\"PDB info or DBI stream absent\")\n+            continue\nPUT 117.=122:\n+        if index in (1, 3):\n+            streams[index] = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n+    version, signature, info_age = unpack(\"<III\", streams[1], 0)\n+    guid = uuid.UUID(bytes_le=take(streams[1], 12, 16))\n+    dbi_signature, dbi_version, dbi_age = unpack(\"<iII\", streams[3], 0)\n+    if dbi_signature != -1:\n+        raise ValueError(\"Unsupported DBI stream header\")\n+    return {\"guid\": str(guid).upper(), \"info_age\": info_age, \"dbi_age\": dbi_age, \"version\": version, \"signature\": signature, \"dbi_version\": dbi_version}\nPUT 167.=167:\n+            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl().split(\"?\", 1)[0], \"redirect_query_omitted\": True})\nPUT 182.=184:\n+    # Microsoft PDB1::OpenValidate4: info age >= image age; DBI age == image age.\n+    # Require exact nonzero DBI age here rather than accepting the legacy age-0 bypass.\n+    if identity[\"guid\"] != cv[\"guid\"] or identity[\"dbi_age\"] != cv[\"age\"] or identity[\"info_age\"] < cv[\"age\"]:\n+        raise ValueError(\"Downloaded PDB GUID/DBI age does not match DLL CodeView\")\n+    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True, \"identity_validation\": \"GUID exact; DBI age exact to image CodeView; info age >= image age, per Microsoft PDB1::OpenValidate4\"})\n*** End Patch\n"},"customWireName":"edit"}],"api":"openai-codex-responses","provider":"openai-codex","model":"gpt-6-astra","usage":{"input":58431,"output":575,"cacheRead":0,"cacheWrite":0,"totalTokens":59006,"cost":{"input":0.58431,"output":0.02875,"cacheRead":0,"cacheWrite":0,"total":0.61306}},"stopReason":"toolUse","timestamp":1789544198573,"responseId":"resp_0b7dfeb5677134ec016aaa470835e487d2bbde2d29bcf30c30","providerPayload":{"type":"openaiResponsesHistory","provider":"openai-codex","dt":true,"items":[{"id":"ctc_0b7dfeb5677134ec016aaa470aa3cc87d28403e2f4ad61a3f2","type":"custom_tool_call","status":"completed","call_id":"call_wb0Fb3sTnoyvtzsojfL2C9ez","input":"*** Begin Patch\n[.spt/preserved/302/symbols/prepare_symbols.py#9E4A]\nPUT >20:\n+    \"https://llvm.org/docs/PDB/DbiStream.html\",\n+    \"https://github.com/microsoft/microsoft-pdb/blob/master/PDB/dbi/pdb.cpp#L808-L882\",\nPUT 105.=106:\n+    if stream_count < 4:\n+        raise ValueError(\"PDB info or DBI stream missing\")\nPUT 109.=113:\n+    streams = {}\n+    for index, size in enumerate(sizes[:4]):\n+        if size == 0xffffffff:\n+            if index in (1, 3):\n+                raise ValueError(\"PDB info or DBI stream absent\")\n+            continue\nPUT 117.=122:\n+        if index in (1, 3):\n+            streams[index] = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n+    version, signature, info_age = unpack(\"<III\", streams[1], 0)\n+    guid = uuid.UUID(bytes_le=take(streams[1], 12, 16))\n+    dbi_signature, dbi_version, dbi_age = unpack(\"<iII\", streams[3], 0)\n+    if dbi_signature != -1:\n+        raise ValueError(\"Unsupported DBI stream header\")\n+    return {\"guid\": str(guid).upper(), \"info_age\": info_age, \"dbi_age\": dbi_age, \"version\": version, \"signature\": signature, \"dbi_version\": dbi_version}\nPUT 167.=167:\n+            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl().split(\"?\", 1)[0], \"redirect_query_omitted\": True})\nPUT 182.=184:\n+    # Microsoft PDB1::OpenValidate4: info age >= image age; DBI age == image age.\n+    # Require exact nonzero DBI age here rather than accepting the legacy age-0 bypass.\n+    if identity[\"guid\"] != cv[\"guid\"] or identity[\"dbi_age\"] != cv[\"age\"] or identity[\"info_age\"] < cv[\"age\"]:\n+        raise ValueError(\"Downloaded PDB GUID/DBI age does not match DLL CodeView\")\n+    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True, \"identity_validation\": \"GUID exact; DBI age exact to image CodeView; info age >= image age, per Microsoft PDB1::OpenValidate4\"})\n*** End Patch\n","internal_chat_message_metadata_passthrough":{"create_time":1789544200.682174,"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"},"name":"edit","metadata":{"turn_id":"32c4d48a-45a4-45e2-8752-66c855549d48"}}]},"duration":22346.078699998558,"ttft":4088.067399997264,"completedAt":1789544220920,"contextSnapshot":{"promptTokens":58431,"nonMessageTokens":16994,"compactionEpoch":0}}}
{"type":"message","id":"2173d7c4","parentId":"ba0fa89c","timestamp":"2026-09-16T07:37:00.952Z","message":{"role":"toolResult","toolCallId":"call_wb0Fb3sTnoyvtzsojfL2C9ez|ctc_0b7dfeb5677134ec016aaa470aa3cc87d28403e2f4ad61a3f2","toolName":"edit","content":[{"type":"text","text":"[.spt/preserved/302/symbols/prepare_symbols.py#E41B]\n16:SOURCES = [\n\n19:    \"https://llvm.org/docs/PDB/MsfFile.html\",\n20:    \"https://llvm.org/docs/PDB/PdbStream.html\",\n21:    \"https://llvm.org/docs/PDB/DbiStream.html\",\n22:    \"https://github.com/microsoft/microsoft-pdb/blob/master/PDB/dbi/pdb.cpp#L808-L882\",\n23:]\n24:\n\n95:def pdb_identity(data):\n96:    if take(data, 0, 32) != b\"Microsoft C/C++ MSF 7.00\\r\\n\\x1aDS\\0\\0\\0\":\n\n105:    directory = b\"\".join(take(data, b * block_size, block_size) for b in directory_blocks)[:directory_size]\n106:    stream_count, = unpack(\"<I\", directory, 0)\n107:    if stream_count < 4:\n108:        raise ValueError(\"PDB info or DBI stream missing\")\n109:    sizes = unpack(f\"<{stream_count}I\", directory, 4)\n110:    cursor = 4 + stream_count * 4\n111:    streams = {}\n112:    for index, size in enumerate(sizes[:4]):\n113:        if size == 0xffffffff:\n114:            if index in (1, 3):\n115:                raise ValueError(\"PDB info or DBI stream absent\")\n116:            continue\n117:        count = (size + block_size - 1) // block_size\n118:        stream_blocks = unpack(f\"<{count}I\", directory, cursor)\n119:        cursor += count * 4\n120:        if index in (1, 3):\n121:            streams[index] = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n…\n126:        raise ValueError(\"Unsupported DBI stream header\")\n127:    return {\"guid\": str(guid).upper(), \"info_age\": info_age, \"dbi_age\": dbi_age, \"version\": version, \"signature\": signature, \"dbi_version\": dbi_version}\n128:\n129:\n170:        request = urllib.request.Request(url, headers={\"User-Agent\": \"spt-302-local-symbol-preparation\"})\n171:        with urllib.request.urlopen(request, timeout=30) as response:\n172:            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl().split(\"?\", 1)[0], \"redirect_query_omitted\": True})\n173:            chunks = []\n174:            size = 0\n\n183:            data = b\"\".join(chunks)\n\n185:    identity = pdb_identity(data)\n186:    entry[\"pdb_identity\"] = identity\n187:    # Microsoft PDB1::OpenValidate4: info age >= image age; DBI age == image age.\n188:    # Require exact nonzero DBI age here rather than accepting the legacy age-0 bypass.\n189:    if identity[\"guid\"] != cv[\"guid\"] or identity[\"dbi_age\"] != cv[\"age\"] or identity[\"info_age\"] < cv[\"age\"]:\n190:        raise ValueError(\"Downloaded PDB GUID/DBI age does not match DLL CodeView\")\n191:    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True, \"identity_validation\": \"GUID exact; DBI age exact to image CodeView; info age >= image age, per Microsoft PDB1::OpenValidate4\"})\n192:    target.parent.mkdir(parents=True, exist_ok=True)\n193:    if not target.exists():\n194:        target.write_bytes(data)"}],"details":{"diff":" 16|SOURCES = [\n\n 19|    \"https://llvm.org/docs/PDB/MsfFile.html\",\n 20|    \"https://llvm.org/docs/PDB/PdbStream.html\",\n+21|    \"https://llvm.org/docs/PDB/DbiStream.html\",\n+22|    \"https://github.com/microsoft/microsoft-pdb/blob/master/PDB/dbi/pdb.cpp#L808-L882\",\n 21|]\n 22|\n\n 93|def pdb_identity(data):\n 94|    if take(data, 0, 32) != b\"Microsoft C/C++ MSF 7.00\\r\\n\\x1aDS\\0\\0\\0\":\n\n 103|    directory = b\"\".join(take(data, b * block_size, block_size) for b in directory_blocks)[:directory_size]\n 104|    stream_count, = unpack(\"<I\", directory, 0)\n-105|    if stream_count < 2:\n-106|        raise ValueError(\"PDB info stream missing\")\n+107|    if stream_count < 4:\n+108|        raise ValueError(\"PDB info or DBI stream missing\")\n 107|    sizes = unpack(f\"<{stream_count}I\", directory, 4)\n 108|    cursor = 4 + stream_count * 4\n-109|    for index, size in enumerate(sizes[:2]):\n+111|    streams = {}\n+112|    for index, size in enumerate(sizes[:4]):\n 110|        if size == 0xffffffff:\n-111|            if index == 1:\n-112|                raise ValueError(\"PDB info stream absent\")\n+114|            if index in (1, 3):\n+115|                raise ValueError(\"PDB info or DBI stream absent\")\n 113|            continue\n 114|        count = (size + block_size - 1) // block_size\n 115|        stream_blocks = unpack(f\"<{count}I\", directory, cursor)\n 116|        cursor += count * 4\n-117|        if index == 1:\n-118|            info = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n-119|            version, signature, age = unpack(\"<III\", info, 0)\n-120|            guid = uuid.UUID(bytes_le=take(info, 12, 16))\n-121|            return {\"guid\": str(guid).upper(), \"age\": age, \"version\": version, \"signature\": signature}\n-122|    raise ValueError(\"PDB info stream not decoded\")\n+120|        if index in (1, 3):\n+121|            streams[index] = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n+122|    version, signature, info_age = unpack(\"<III\", streams[1], 0)\n+123|    guid = uuid.UUID(bytes_le=take(streams[1], 12, 16))\n+124|    dbi_signature, dbi_version, dbi_age = unpack(\"<iII\", streams[3], 0)\n+125|    if dbi_signature != -1:\n+126|        raise ValueError(\"Unsupported DBI stream header\")\n+127|    return {\"guid\": str(guid).upper(), \"info_age\": info_age, \"dbi_age\": dbi_age, \"version\": version, \"signature\": signature, \"dbi_version\": dbi_version}\n 123|\n 124|\n 165|        request = urllib.request.Request(url, headers={\"User-Agent\": \"spt-302-local-symbol-preparation\"})\n 166|        with urllib.request.urlopen(request, timeout=30) as response:\n-167|            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl()})\n+172|            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl().split(\"?\", 1)[0], \"redirect_query_omitted\": True})\n 168|            chunks = []\n 169|            size = 0\n\n 178|            data = b\"\".join(chunks)\n\n 180|    identity = pdb_identity(data)\n 181|    entry[\"pdb_identity\"] = identity\n-182|    if (identity[\"guid\"], identity[\"age\"]) != (cv[\"guid\"], cv[\"age\"]):\n-183|        raise ValueError(\"Downloaded PDB GUID+age does not match DLL CodeView\")\n-184|    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True})\n+187|    # Microsoft PDB1::OpenValidate4: info age >= image age; DBI age == image age.\n+188|    # Require exact nonzero DBI age here rather than accepting the legacy age-0 bypass.\n+189|    if identity[\"guid\"] != cv[\"guid\"] or identity[\"dbi_age\"] != cv[\"age\"] or identity[\"info_age\"] < cv[\"age\"]:\n+190|        raise ValueError(\"Downloaded PDB GUID/DBI age does not match DLL CodeView\")\n+191|    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True, \"identity_validation\": \"GUID exact; DBI age exact to image CodeView; info age >= image age, per Microsoft PDB1::OpenValidate4\"})\n 185|    target.parent.mkdir(parents=True, exist_ok=True)\n 186|    if not target.exists():\n 187|        target.write_bytes(data)","firstChangedLine":20,"op":"update","path":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.spt\\preserved\\302\\symbols\\prepare_symbols.py","oldText":"\"\"\"Prepare exact local PDBs from recorded missing PCs; never launch/attach a target.\"\"\"\nimport ctypes\nimport datetime\nimport hashlib\nimport json\nimport os\nfrom pathlib import Path\nimport struct\nimport time\nimport urllib.request\nimport uuid\n\nROOT = Path(__file__).resolve().parent\nSTACKS = ROOT.parent / \"todlando-windows/forced-1/analysis/stacks.jsonl\"\nSERVER = \"https://msdl.microsoft.com/download/symbols\"\nSOURCES = [\n    \"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv\",\n    \"https://learn.microsoft.com/en-us/windows/win32/debug/pe-format\",\n    \"https://llvm.org/docs/PDB/MsfFile.html\",\n    \"https://llvm.org/docs/PDB/PdbStream.html\",\n]\n\n\ndef sha256(data):\n    return hashlib.sha256(data).hexdigest()\n\n\ndef take(data, offset, size):\n    if offset < 0 or size < 0 or offset + size > len(data):\n        raise ValueError(f\"Out-of-bounds file read: {offset}+{size}/{len(data)}\")\n    return data[offset:offset + size]\n\n\ndef unpack(fmt, data, offset):\n    return struct.unpack(fmt, take(data, offset, struct.calcsize(fmt)))\n\n\ndef pe_identity(data):\n    if take(data, 0, 2) != b\"MZ\":\n        raise ValueError(\"Missing DOS signature\")\n    pe, = unpack(\"<I\", data, 0x3c)\n    if take(data, pe, 4) != b\"PE\\0\\0\":\n        raise ValueError(\"Missing PE signature\")\n    machine, sections, timestamp, _, _, optional_size, _ = unpack(\"<HHIIIHH\", data, pe + 4)\n    optional = pe + 24\n    magic, = unpack(\"<H\", data, optional)\n    if machine != 0x8664 or magic != 0x20b:\n        raise ValueError(\"Expected native x64 PE32+ system DLL\")\n    if optional_size < 112 + 7 * 8 or unpack(\"<I\", data, optional + 108)[0] < 7:\n        raise ValueError(\"Missing debug data directory\")\n    image_size, headers_size = unpack(\"<II\", data, optional + 56)\n    debug_rva, debug_size = unpack(\"<II\", data, optional + 112 + 6 * 8)\n    section_ranges = []\n    for i in range(sections):\n        entry = optional + optional_size + 40 * i\n        virtual_size, rva, raw_size, raw_offset = unpack(\"<IIII\", data, entry + 8)\n        section_ranges.append((rva, raw_size, raw_offset))\n\n    def file_offset(rva):\n        if rva < headers_size:\n            return rva\n        for start, size, offset in section_ranges:\n            if start <= rva < start + size:\n                return offset + rva - start\n        raise ValueError(f\"RVA 0x{rva:x} lacks file-backed section\")\n\n    if not debug_rva or not debug_size or debug_size % 28:\n        raise ValueError(\"Invalid debug directory\")\n    records = []\n    debug_offset = file_offset(debug_rva)\n    for i in range(debug_size // 28):\n        _, _, _, _, kind, size, _, raw = unpack(\"<IIHHIIII\", data, debug_offset + i * 28)\n        if kind != 2:\n            continue\n        codeview = take(data, raw, size)\n        if take(codeview, 0, 4) != b\"RSDS\":\n            raise ValueError(\"CodeView is not RSDS\")\n        guid = uuid.UUID(bytes_le=take(codeview, 4, 16))\n        age, = unpack(\"<I\", codeview, 20)\n        name_data = take(codeview, 24, len(codeview) - 24)\n        if b\"\\0\" not in name_data:\n            raise ValueError(\"Unterminated PDB name\")\n        embedded = name_data.split(b\"\\0\", 1)[0].decode(\"utf-8\")\n        name = embedded.replace(\"\\\\\", \"/\").split(\"/\")[-1]\n        if not name.lower().endswith(\".pdb\") or any(c not in \"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_.-\" for c in name):\n            raise ValueError(\"Unsafe PDB basename\")\n        records.append({\"guid\": str(guid).upper(), \"age\": age, \"key\": guid.hex.upper() + format(age, \"X\"), \"name\": name, \"embedded_path\": embedded})\n    if len(records) != 1:\n        raise ValueError(f\"Expected exactly one CodeView record, found {len(records)}\")\n    return {\"machine\": hex(machine), \"timestamp\": hex(timestamp), \"image_size\": image_size, \"codeview\": records[0]}\n\n\ndef pdb_identity(data):\n    if take(data, 0, 32) != b\"Microsoft C/C++ MSF 7.00\\r\\n\\x1aDS\\0\\0\\0\":\n        raise ValueError(\"Unsupported PDB container (expected MSF 7)\")\n    block_size, _, blocks, directory_size, _, block_map = unpack(\"<6I\", data, 32)\n    if block_size not in (512, 1024, 2048, 4096) or blocks * block_size != len(data):\n        raise ValueError(\"Invalid MSF block geometry\")\n    directory_count = (directory_size + block_size - 1) // block_size\n    if directory_count * 4 > block_size:\n        raise ValueError(\"Unsupported multi-block MSF directory map\")\n    directory_blocks = unpack(f\"<{directory_count}I\", data, block_map * block_size)\n    directory = b\"\".join(take(data, b * block_size, block_size) for b in directory_blocks)[:directory_size]\n    stream_count, = unpack(\"<I\", directory, 0)\n    if stream_count < 2:\n        raise ValueError(\"PDB info stream missing\")\n    sizes = unpack(f\"<{stream_count}I\", directory, 4)\n    cursor = 4 + stream_count * 4\n    for index, size in enumerate(sizes[:2]):\n        if size == 0xffffffff:\n            if index == 1:\n                raise ValueError(\"PDB info stream absent\")\n            continue\n        count = (size + block_size - 1) // block_size\n        stream_blocks = unpack(f\"<{count}I\", directory, cursor)\n        cursor += count * 4\n        if index == 1:\n            info = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n            version, signature, age = unpack(\"<III\", info, 0)\n            guid = uuid.UUID(bytes_le=take(info, 12, 16))\n            return {\"guid\": str(guid).upper(), \"age\": age, \"version\": version, \"signature\": signature}\n    raise ValueError(\"PDB info stream not decoded\")\n\n\ndef map_recorded_pcs(pcs):\n    kernel = ctypes.WinDLL(\"kernel32\", use_last_error=True)\n    kernel.GetModuleHandleExW.argtypes = [ctypes.c_ulong, ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p)]\n    kernel.GetModuleHandleExW.restype = ctypes.c_int\n    kernel.GetModuleFileNameW.argtypes = [ctypes.c_void_p, ctypes.c_wchar_p, ctypes.c_ulong]\n    kernel.GetModuleFileNameW.restype = ctypes.c_ulong\n    modules = {}\n    for pc in sorted(pcs):\n        module = ctypes.c_void_p()\n        # FROM_ADDRESS | UNCHANGED_REFCOUNT; own preparation process only.\n        if not kernel.GetModuleHandleExW(6, pc, ctypes.byref(module)):\n            raise ctypes.WinError(ctypes.get_last_error())\n        path = ctypes.create_unicode_buffer(32768)\n        count = kernel.GetModuleFileNameW(module, path, len(path))\n        if count == 0 or count >= len(path):\n            raise ctypes.WinError(ctypes.get_last_error())\n        dll = Path(path.value).resolve()\n        if dll.parent != (Path(os.environ[\"SystemRoot\"]) / \"System32\").resolve():\n            raise ValueError(f\"Recorded missing PC maps outside System32: {dll}\")\n        key = str(dll).lower()\n        entry = modules.setdefault(key, {\"dll_path\": str(dll), \"preparation_process_base\": hex(module.value), \"recorded_pcs\": []})\n        entry[\"recorded_pcs\"].append({\"pc\": hex(pc), \"rva\": hex(pc - module.value)})\n    return list(modules.values())\n\n\ndef prepare_module(entry):\n    dll_data = Path(entry[\"dll_path\"]).read_bytes()\n    entry.update({\"dll_sha256\": sha256(dll_data), \"dll_size\": len(dll_data), \"pe\": pe_identity(dll_data)})\n    for address in entry[\"recorded_pcs\"]:\n        if not 0 <= int(address[\"rva\"], 16) < entry[\"pe\"][\"image_size\"]:\n            raise ValueError(\"Recorded PC outside PE SizeOfImage\")\n    cv = entry[\"pe\"][\"codeview\"]\n    url = f\"{SERVER}/{cv['name']}/{cv['key']}/{cv['name']}\"\n    target = ROOT / \"cache\" / cv[\"name\"] / cv[\"key\"] / cv[\"name\"]\n    entry.update({\"download_url\": url, \"cache_path\": str(target)})\n    if target.exists():\n        data = target.read_bytes()\n        entry[\"acquisition\"] = \"existing-cache-revalidated\"\n    else:\n        start = time.monotonic()\n        request = urllib.request.Request(url, headers={\"User-Agent\": \"spt-302-local-symbol-preparation\"})\n        with urllib.request.urlopen(request, timeout=30) as response:\n            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl()})\n            chunks = []\n            size = 0\n            while True:\n                chunk = response.read(1024 * 1024)\n                if not chunk:\n                    break\n                chunks.append(chunk)\n                size += len(chunk)\n                if size > 64 * 1024 * 1024 or time.monotonic() - start > 120:\n                    raise ValueError(\"Download exceeds finite size/time bound\")\n            data = b\"\".join(chunks)\n        entry[\"acquisition\"] = \"downloaded\"\n    identity = pdb_identity(data)\n    entry[\"pdb_identity\"] = identity\n    if (identity[\"guid\"], identity[\"age\"]) != (cv[\"guid\"], cv[\"age\"]):\n        raise ValueError(\"Downloaded PDB GUID+age does not match DLL CodeView\")\n    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True})\n    target.parent.mkdir(parents=True, exist_ok=True)\n    if not target.exists():\n        target.write_bytes(data)\n    flat = ROOT / \"flat\" / cv[\"name\"]\n    flat.parent.mkdir(parents=True, exist_ok=True)\n    if flat.exists():\n        if sha256(flat.read_bytes()) != entry[\"pdb_sha256\"]:\n            raise ValueError(f\"Different PDB already occupies flat path: {flat}\")\n        entry[\"flat_staging\"] = \"existing-revalidated\"\n    else:\n        os.link(target, flat)\n        entry[\"flat_staging\"] = \"hardlink\"\n    entry.update({\"flat_path\": str(flat), \"flat_sha256\": sha256(flat.read_bytes()), \"status\": \"prepared\"})\n\n\ndef main():\n    receipt = {\n        \"started_utc\": datetime.datetime.now(datetime.timezone.utc).isoformat(),\n        \"script_path\": str(Path(__file__).resolve()),\n        \"script_sha256\": sha256(Path(__file__).read_bytes()),\n        \"sources\": SOURCES,\n        \"purpose\": \"Finite PDB file preparation only; no diagnostic runtime, debugger, builds, tests, or resident configuration changes\",\n        \"mapping_method\": \"Recorded missing PCs queried with GetModuleHandleExW(FROM_ADDRESS|UNCHANGED_REFCOUNT) in this preparation process, then checked against exact DLL SizeOfImage\",\n        \"mapping_scope_limit\": \"Original forced capture did not record module bases. These are directly observed matching system-module address ranges in the preparation process, not a module enumeration of the terminated capture process.\",\n        \"search_path_environment\": {\"SPT_NET_DIAG_SYMBOL_DIR\": str(ROOT / \"flat\")},\n        \"integration_requirement\": \"Append this plain local absolute directory to the explicit executable-directory DbgHelp search path before initialization. Retain exact-PDB and ignore-CodeView-path policies; do not add srv, URLs, UNC, ambient symbol paths, or capture-time downloads.\",\n        \"modules\": [],\n        \"errors\": [],\n    }\n    try:\n        source = STACKS.read_bytes()\n        rows = [json.loads(line) for line in source.splitlines() if line]\n        first = rows[0]\n        pcs = {int(frame.split()[0], 16) for worker in first[\"workers\"] for frame in worker[\"frames\"] if \"symbol unavailable\" in frame}\n        if not pcs:\n            raise ValueError(\"First capture has no unresolved PCs\")\n        all_pcs = {int(frame.split()[0], 16) for row in rows for worker in row[\"workers\"] for frame in worker[\"frames\"] if \"symbol unavailable\" in frame}\n        receipt[\"capture_evidence\"] = {\"path\": str(STACKS), \"sha256\": sha256(source), \"first_capture_id\": first[\"capture_id\"], \"broker_pid\": first[\"broker_pid\"], \"worker_tids\": [worker[\"tid\"] for worker in first[\"workers\"]], \"first_missing_pcs\": [hex(pc) for pc in sorted(pcs)], \"additional_missing_pcs_in_later_captures\": [hex(pc) for pc in sorted(all_pcs - pcs)]}\n        receipt[\"modules\"] = map_recorded_pcs(pcs)\n        for entry in receipt[\"modules\"]:\n            try:\n                prepare_module(entry)\n            except Exception as error:\n                entry.update({\"status\": \"failed\", \"error\": f\"{type(error).__name__}: {error}\"})\n                receipt[\"errors\"].append(entry[\"error\"])\n    except Exception as error:\n        receipt[\"errors\"].append(f\"{type(error).__name__}: {error}\")\n    receipt[\"status\"] = \"prepared\" if receipt[\"modules\"] and not receipt[\"errors\"] else \"failed\"\n    receipt[\"finished_utc\"] = datetime.datetime.now(datetime.timezone.utc).isoformat()\n    path = ROOT / \"preparation-receipt.json\"\n    path.write_text(json.dumps(receipt, indent=2) + \"\\n\", encoding=\"utf-8\")\n    print(json.dumps({\"status\": receipt[\"status\"], \"receipt\": str(path), \"modules\": [{\"dll\": m[\"dll_path\"], \"status\": m.get(\"status\"), \"pdb_identity\": m.get(\"pdb_identity\"), \"error\": m.get(\"error\")} for m in receipt[\"modules\"]]}, indent=2))\n    return 0 if receipt[\"status\"] == \"prepared\" else 1\n\n\nif __name__ == \"__main__\":\n    raise SystemExit(main())\n","newText":"\"\"\"Prepare exact local PDBs from recorded missing PCs; never launch/attach a target.\"\"\"\nimport ctypes\nimport datetime\nimport hashlib\nimport json\nimport os\nfrom pathlib import Path\nimport struct\nimport time\nimport urllib.request\nimport uuid\n\nROOT = Path(__file__).resolve().parent\nSTACKS = ROOT.parent / \"todlando-windows/forced-1/analysis/stacks.jsonl\"\nSERVER = \"https://msdl.microsoft.com/download/symbols\"\nSOURCES = [\n    \"https://learn.microsoft.com/en-us/windows/win32/debug/using-symsrv\",\n    \"https://learn.microsoft.com/en-us/windows/win32/debug/pe-format\",\n    \"https://llvm.org/docs/PDB/MsfFile.html\",\n    \"https://llvm.org/docs/PDB/PdbStream.html\",\n    \"https://llvm.org/docs/PDB/DbiStream.html\",\n    \"https://github.com/microsoft/microsoft-pdb/blob/master/PDB/dbi/pdb.cpp#L808-L882\",\n]\n\n\ndef sha256(data):\n    return hashlib.sha256(data).hexdigest()\n\n\ndef take(data, offset, size):\n    if offset < 0 or size < 0 or offset + size > len(data):\n        raise ValueError(f\"Out-of-bounds file read: {offset}+{size}/{len(data)}\")\n    return data[offset:offset + size]\n\n\ndef unpack(fmt, data, offset):\n    return struct.unpack(fmt, take(data, offset, struct.calcsize(fmt)))\n\n\ndef pe_identity(data):\n    if take(data, 0, 2) != b\"MZ\":\n        raise ValueError(\"Missing DOS signature\")\n    pe, = unpack(\"<I\", data, 0x3c)\n    if take(data, pe, 4) != b\"PE\\0\\0\":\n        raise ValueError(\"Missing PE signature\")\n    machine, sections, timestamp, _, _, optional_size, _ = unpack(\"<HHIIIHH\", data, pe + 4)\n    optional = pe + 24\n    magic, = unpack(\"<H\", data, optional)\n    if machine != 0x8664 or magic != 0x20b:\n        raise ValueError(\"Expected native x64 PE32+ system DLL\")\n    if optional_size < 112 + 7 * 8 or unpack(\"<I\", data, optional + 108)[0] < 7:\n        raise ValueError(\"Missing debug data directory\")\n    image_size, headers_size = unpack(\"<II\", data, optional + 56)\n    debug_rva, debug_size = unpack(\"<II\", data, optional + 112 + 6 * 8)\n    section_ranges = []\n    for i in range(sections):\n        entry = optional + optional_size + 40 * i\n        virtual_size, rva, raw_size, raw_offset = unpack(\"<IIII\", data, entry + 8)\n        section_ranges.append((rva, raw_size, raw_offset))\n\n    def file_offset(rva):\n        if rva < headers_size:\n            return rva\n        for start, size, offset in section_ranges:\n            if start <= rva < start + size:\n                return offset + rva - start\n        raise ValueError(f\"RVA 0x{rva:x} lacks file-backed section\")\n\n    if not debug_rva or not debug_size or debug_size % 28:\n        raise ValueError(\"Invalid debug directory\")\n    records = []\n    debug_offset = file_offset(debug_rva)\n    for i in range(debug_size // 28):\n        _, _, _, _, kind, size, _, raw = unpack(\"<IIHHIIII\", data, debug_offset + i * 28)\n        if kind != 2:\n            continue\n        codeview = take(data, raw, size)\n        if take(codeview, 0, 4) != b\"RSDS\":\n            raise ValueError(\"CodeView is not RSDS\")\n        guid = uuid.UUID(bytes_le=take(codeview, 4, 16))\n        age, = unpack(\"<I\", codeview, 20)\n        name_data = take(codeview, 24, len(codeview) - 24)\n        if b\"\\0\" not in name_data:\n            raise ValueError(\"Unterminated PDB name\")\n        embedded = name_data.split(b\"\\0\", 1)[0].decode(\"utf-8\")\n        name = embedded.replace(\"\\\\\", \"/\").split(\"/\")[-1]\n        if not name.lower().endswith(\".pdb\") or any(c not in \"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_.-\" for c in name):\n            raise ValueError(\"Unsafe PDB basename\")\n        records.append({\"guid\": str(guid).upper(), \"age\": age, \"key\": guid.hex.upper() + format(age, \"X\"), \"name\": name, \"embedded_path\": embedded})\n    if len(records) != 1:\n        raise ValueError(f\"Expected exactly one CodeView record, found {len(records)}\")\n    return {\"machine\": hex(machine), \"timestamp\": hex(timestamp), \"image_size\": image_size, \"codeview\": records[0]}\n\n\ndef pdb_identity(data):\n    if take(data, 0, 32) != b\"Microsoft C/C++ MSF 7.00\\r\\n\\x1aDS\\0\\0\\0\":\n        raise ValueError(\"Unsupported PDB container (expected MSF 7)\")\n    block_size, _, blocks, directory_size, _, block_map = unpack(\"<6I\", data, 32)\n    if block_size not in (512, 1024, 2048, 4096) or blocks * block_size != len(data):\n        raise ValueError(\"Invalid MSF block geometry\")\n    directory_count = (directory_size + block_size - 1) // block_size\n    if directory_count * 4 > block_size:\n        raise ValueError(\"Unsupported multi-block MSF directory map\")\n    directory_blocks = unpack(f\"<{directory_count}I\", data, block_map * block_size)\n    directory = b\"\".join(take(data, b * block_size, block_size) for b in directory_blocks)[:directory_size]\n    stream_count, = unpack(\"<I\", directory, 0)\n    if stream_count < 4:\n        raise ValueError(\"PDB info or DBI stream missing\")\n    sizes = unpack(f\"<{stream_count}I\", directory, 4)\n    cursor = 4 + stream_count * 4\n    streams = {}\n    for index, size in enumerate(sizes[:4]):\n        if size == 0xffffffff:\n            if index in (1, 3):\n                raise ValueError(\"PDB info or DBI stream absent\")\n            continue\n        count = (size + block_size - 1) // block_size\n        stream_blocks = unpack(f\"<{count}I\", directory, cursor)\n        cursor += count * 4\n        if index in (1, 3):\n            streams[index] = b\"\".join(take(data, b * block_size, block_size) for b in stream_blocks)[:size]\n    version, signature, info_age = unpack(\"<III\", streams[1], 0)\n    guid = uuid.UUID(bytes_le=take(streams[1], 12, 16))\n    dbi_signature, dbi_version, dbi_age = unpack(\"<iII\", streams[3], 0)\n    if dbi_signature != -1:\n        raise ValueError(\"Unsupported DBI stream header\")\n    return {\"guid\": str(guid).upper(), \"info_age\": info_age, \"dbi_age\": dbi_age, \"version\": version, \"signature\": signature, \"dbi_version\": dbi_version}\n\n\ndef map_recorded_pcs(pcs):\n    kernel = ctypes.WinDLL(\"kernel32\", use_last_error=True)\n    kernel.GetModuleHandleExW.argtypes = [ctypes.c_ulong, ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p)]\n    kernel.GetModuleHandleExW.restype = ctypes.c_int\n    kernel.GetModuleFileNameW.argtypes = [ctypes.c_void_p, ctypes.c_wchar_p, ctypes.c_ulong]\n    kernel.GetModuleFileNameW.restype = ctypes.c_ulong\n    modules = {}\n    for pc in sorted(pcs):\n        module = ctypes.c_void_p()\n        # FROM_ADDRESS | UNCHANGED_REFCOUNT; own preparation process only.\n        if not kernel.GetModuleHandleExW(6, pc, ctypes.byref(module)):\n            raise ctypes.WinError(ctypes.get_last_error())\n        path = ctypes.create_unicode_buffer(32768)\n        count = kernel.GetModuleFileNameW(module, path, len(path))\n        if count == 0 or count >= len(path):\n            raise ctypes.WinError(ctypes.get_last_error())\n        dll = Path(path.value).resolve()\n        if dll.parent != (Path(os.environ[\"SystemRoot\"]) / \"System32\").resolve():\n            raise ValueError(f\"Recorded missing PC maps outside System32: {dll}\")\n        key = str(dll).lower()\n        entry = modules.setdefault(key, {\"dll_path\": str(dll), \"preparation_process_base\": hex(module.value), \"recorded_pcs\": []})\n        entry[\"recorded_pcs\"].append({\"pc\": hex(pc), \"rva\": hex(pc - module.value)})\n    return list(modules.values())\n\n\ndef prepare_module(entry):\n    dll_data = Path(entry[\"dll_path\"]).read_bytes()\n    entry.update({\"dll_sha256\": sha256(dll_data), \"dll_size\": len(dll_data), \"pe\": pe_identity(dll_data)})\n    for address in entry[\"recorded_pcs\"]:\n        if not 0 <= int(address[\"rva\"], 16) < entry[\"pe\"][\"image_size\"]:\n            raise ValueError(\"Recorded PC outside PE SizeOfImage\")\n    cv = entry[\"pe\"][\"codeview\"]\n    url = f\"{SERVER}/{cv['name']}/{cv['key']}/{cv['name']}\"\n    target = ROOT / \"cache\" / cv[\"name\"] / cv[\"key\"] / cv[\"name\"]\n    entry.update({\"download_url\": url, \"cache_path\": str(target)})\n    if target.exists():\n        data = target.read_bytes()\n        entry[\"acquisition\"] = \"existing-cache-revalidated\"\n    else:\n        start = time.monotonic()\n        request = urllib.request.Request(url, headers={\"User-Agent\": \"spt-302-local-symbol-preparation\"})\n        with urllib.request.urlopen(request, timeout=30) as response:\n            entry.update({\"http_status\": response.status, \"final_download_url\": response.geturl().split(\"?\", 1)[0], \"redirect_query_omitted\": True})\n            chunks = []\n            size = 0\n            while True:\n                chunk = response.read(1024 * 1024)\n                if not chunk:\n                    break\n                chunks.append(chunk)\n                size += len(chunk)\n                if size > 64 * 1024 * 1024 or time.monotonic() - start > 120:\n                    raise ValueError(\"Download exceeds finite size/time bound\")\n            data = b\"\".join(chunks)\n        entry[\"acquisition\"] = \"downloaded\"\n    identity = pdb_identity(data)\n    entry[\"pdb_identity\"] = identity\n    # Microsoft PDB1::OpenValidate4: info age >= image age; DBI age == image age.\n    # Require exact nonzero DBI age here rather than accepting the legacy age-0 bypass.\n    if identity[\"guid\"] != cv[\"guid\"] or identity[\"dbi_age\"] != cv[\"age\"] or identity[\"info_age\"] < cv[\"age\"]:\n        raise ValueError(\"Downloaded PDB GUID/DBI age does not match DLL CodeView\")\n    entry.update({\"pdb_sha256\": sha256(data), \"pdb_size\": len(data), \"identity_match\": True, \"identity_validation\": \"GUID exact; DBI age exact to image CodeView; info age >= image age, per Microsoft PDB1::OpenValidate4\"})\n    target.parent.mkdir(parents=True, exist_ok=True)\n    if not target.exists():\n        target.write_bytes(data)\n    flat = ROOT / \"flat\" / cv[\"name\"]\n    flat.parent.mkdir(parents=True, exist_ok=True)\n    if flat.exists():\n        if sha256(flat.read_bytes()) != entry[\"pdb_sha256\"]:\n            raise ValueError(f\"Different PDB already occupies flat path: {flat}\")\n        entry[\"flat_staging\"] = \"existing-revalidated\"\n    else:\n        os.link(target, flat)\n        entry[\"flat_staging\"] = \"hardlink\"\n    entry.update({\"flat_path\": str(flat), \"flat_sha256\": sha256(flat.read_bytes()), \"status\": \"prepared\"})\n\n\ndef main():\n    receipt = {\n        \"started_utc\": datetime.datetime.now(datetime.timezone.utc).isoformat(),\n        \"script_path\": str(Path(__file__).resolve()),\n        \"script_sha256\": sha256(Path(__file__).read_bytes()),\n        \"sources\": SOURCES,\n        \"purpose\": \"Finite PDB file preparation only; no diagnostic runtime, debugger, builds, tests, or resident configuration changes\",\n        \"mapping_method\": \"Recorded missing PCs queried with GetModuleHandleExW(FROM_ADDRESS|UNCHANGED_REFCOUNT) in this preparation process, then checked against exact DLL SizeOfImage\",\n        \"mapping_scope_limit\": \"Original forced capture did not record module bases. These are directly observed matching system-module address ranges in the preparation process, not a module enumeration of the terminated capture process.\",\n        \"search_path_environment\": {\"SPT_NET_DIAG_SYMBOL_DIR\": str(ROOT / \"flat\")},\n        \"integration_requirement\": \"Append this plain local absolute directory to the explicit executable-directory DbgHelp search path before initialization. Retain exact-PDB and ignore-CodeView-path policies; do not add srv, URLs, UNC, ambient symbol paths, or capture-time downloads.\",\n        \"modules\": [],\n        \"errors\": [],\n    }\n    try:\n        source = STACKS.read_bytes()\n        rows = [json.loads(line) for line in source.splitlines() if line]\n        first = rows[0]\n        pcs = {int(frame.split()[0], 16) for worker in first[\"workers\"] for frame in worker[\"frames\"] if \"symbol unavailable\" in frame}\n        if not pcs:\n            raise ValueError(\"First capture has no unresolved PCs\")\n        all_pcs = {int(frame.split()[0], 16) for row in rows for worker in row[\"workers\"] for frame in worker[\"frames\"] if \"symbol unavailable\" in frame}\n        receipt[\"capture_evidence\"] = {\"path\": str(STACKS), \"sha256\": sha256(source), \"first_capture_id\": first[\"capture_id\"], \"broker_pid\": first[\"broker_pid\"], \"worker_tids\": [worker[\"tid\"] for worker in first[\"workers\"]], \"first_missing_pcs\": [hex(pc) for pc in sorted(pcs)], \"additional_missing_pcs_in_later_captures\": [hex(pc) for pc in sorted(all_pcs - pcs)]}\n        receipt[\"modules\"] = map_recorded_pcs(pcs)\n        for entry in receipt[\"modules\"]:\n            try:\n                prepare_module(entry)\n            except Exception as error:\n                entry.update({\"status\": \"failed\", \"error\": f\"{type(error).__name__}: {error}\"})\n                receipt[\"errors\"].append(entry[\"error\"])\n    except Exception as error:\n        receipt[\"errors\"].append(f\"{type(error).__name__}: {error}\")\n    receipt[\"status\"] = \"prepared\" if receipt[\"modules\"] and not receipt[\"errors\"] else \"failed\"\n    receipt[\"finished_utc\"] = datetime.datetime.now(datetime.timezone.utc).isoformat()\n    path = ROOT / \"preparation-receipt.json\"\n    path.write_text(json.dumps(receipt, indent=2) + \"\\n\", encoding=\"utf-8\")\n    print(json.dumps({\"status\": receipt[\"status\"], \"receipt\": str(path), \"modules\": [{\"dll\": m[\"dll_path\"], \"status\": m.get(\"status\"), \"pdb_identity\": m.get(\"pdb_identity\"), \"error\": m.get(\"error\")} for m in receipt[\"modules\"]]}, indent=2))\n    return 0 if receipt[\"status\"] == \"prepared\" else 1\n\n\nif __name__ == \"__main__\":\n    raise SystemExit(main())\n"},"isError":false,"timestamp":1789544220951}}
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