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68 lines
4.6 KiB
Markdown
68 lines
4.6 KiB
Markdown
# Package pg — programs: the twin and every reflection answer come from records (P5e wave 2)
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Read in this order, all of it: `PACKAGE-PREAMBLE-P5E.md`, `INTEGRATOR-DECISIONS-P5E.md` (ID-85,
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ID-87, ID-88 are yours), `BRIEF-P5E.md` (§0, §1, §2 "pg", §5, §6 rulings 5, 6, 8, 9),
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`CONTRACT-P5E.md` §5.5, your scout report `scout-S4.md` (all of it), and the program rows of
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`kimi-audit.md` (rows 91-110) — report per row: retired / left barriered / not found. Notes:
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`//wsl.localhost/Arch/home/swung/w7/notes/p5e/`.
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Your slug is `pg`; your tree is `~/w7/p5e-pg` (branch `p5e/pg`, based on the landed id head, built).
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c0e landed `SetProgramBindings` (opcode 80) with its codec/route/thunk, `MGPProgramDesc::LinkStatus`,
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the `MGPipeShaderCsoRecord` fields (`BlockBindings`, `SamplerUnits`, `StorageOverrides`,
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`BindingsSerial`, `LinkStatus`) and `MGPipeApplySetProgramBindings`'s asserting declaration; id landed
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`ResolveProgramTwin(MGPipeHandle)`.
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## What "done" means for this family
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The program twin is keyed by the `ShaderCso` handle; `SyncCurrentProgram`, `BindCurrentTextures`'
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memo key, `BindCurrentProgramWithResources` and `PrepareForCompute`'s program line answer every
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question — link status, SPIR-V status, UBO size and bytes, block bindings, sampler unit indices,
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storage-block overrides, backend state version — from the record and the archived reflection, never
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from the frontend `ProgramObject`. The five frontend-keyed scope sites of this family are gone.
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## Scope
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`MG_Impl/Pipe/ProgramEmit.h` (the artefact archive encoded per link through `ProgramArtifactsCodec`
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into SEG_STAGE; `EmitProgramBindings`; `LinkStatus`; the failed-relink rule),
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`MG_State/GLState/ProgramState/ProgramArtifactsCodec.{h,cpp}` (completeness — name the member the
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codec skips at its libc++ caveat and either carry it or refuse by name), `MG_Pipe/PipeApply.{h,cpp}`
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(`MGPipeApplyCreateShaderState` adopts the blobs into record-owned artefacts under a transport;
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`MGPipeApplySetProgramBindings`), `MG_Pipe/PipeRoute.*` + `MG_Remote/Client/WireTables.cpp` (op 80
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route), `MG_Remote/Server/PipeApplier.cpp` (`OnSetProgramBindings`), `DirectGLES.cpp` (the stash,
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`ResolveGlobalConstantsRecord(handle)`, the `MapUBO` refusal, `SyncCurrentProgram(handle)` incl. the
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broadcast decline arm → Fatal under transport, `PrepareForDraw`'s program line,
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`BindCurrentProgramWithResources` EXCEPT the binding-point half (sb's) and the sampler pass (tx2's),
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`GetCurrentBackendProgram`, `PrepareForCompute`'s program line, `ShaderStorageBlockBinding`'s
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monolith body kept), `Managers.h` + `Managers.cpp` (`SyncToBackend(handle, record)`,
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`CacheResourceLocations`, `ReseedShaderStorageBlockBindings`), `MG_Test/Pipe/ProgramEmitTest.cpp`.
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## Rulings that bind you
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- ID-87 / ruling 8: ENCODE the archive per link (a `SharedPtr` pin is refused by rule B). **Measure**
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links/frame, bytes/link and GL-thread ms on Minecraft + a shader pack before you declare done; if
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the steady cost exceeds ~0.2 ms/frame, fall back to lazy encode at first bind and say so.
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- ID-88 / ruling 9: a failed relink of a bound program re-issues `create_shader_state` with
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`LinkStatus = 0` **iff the frontend reports it unlinked** — verify the frontend's actual behaviour
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in `ProgramObject::Link` rather than assuming; never `object_death`.
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- ID-85 / ruling 5: `set_storage_block_binding` is `kWaitApplied` for now (c0e set the column);
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resolving it by `ShaderCso` is your TRAILING item, not this package.
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- Ruling 6: `BindCurrentTextures`' memo key is BOTH tx2's `SamplerViewsSerial` and your
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`{DrawProgram slot/gen, ShaderCso.Serial, BindingsSerial}`. tx2 owns the line; agree the shape
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through your reports (state exactly what you expect of it).
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## Red-once (execute, revert, quote)
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1. Empty the applier's block-binding tail → `UniformInitializerScenario` / `Glsl420DeclarationScenario`
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wrong pixels (or a named refusal).
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2. Leave the archive blob refs at `Size 0` with the companion pointers removed → `Fatal{ProtocolCorruption}`.
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3. Delete the five scopes without re-keying → the id guard's `Fatal{RoleViolation, "MGPipeSlots"}`
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(id's hook forces "unbarriered").
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4. `strict` names `GetProgramForDraw@draw_vbo` before, and does not after.
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5. Force the global-constants subsystem bit off under run-ahead → `Fatal{UnmigratedVerb, "set_global_constants"}`.
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## Gate
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`build`, `unit`, `isplit`, `gens`; `one` on `RelinkStageSetScenario|PostLinkAttachScenario|ProgramPipelineScenario|AsyncCompileScenario|CsoContentAddressingScenario|HandleRecycleScenario`;
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`strict` (record which markers of this family disappeared). The archive cost measurement is part of
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the gate — report the numbers, not an argument.
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