microsoft / microsoft/DirectXShaderCompiler

DXC linker API doesn't include DXC_OUT_PDB in the result

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bug shader-linking
Dominant language
C++
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Merged PRs (30d)
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Description

Description
When using the DXC linker, the result doesn't emit anything for DXC_OUT_PDB.

It looks like some additional outputs were added with PR #5678, however DXC_OUT_PDB was not one of them.

Steps to Reproduce
Pass -Zi and -Qstrip_debug in the arguments to IDxcLinker::Link, use QueryInterface to retrieve the IDxcResult from the linker, and call GetOutput(DXC_OUT_PDB, ...) on the linker result.

Actual Behavior
GetResult returns E_INVALIDARG

Environment

  • DXC version dxcompiler.dll: 1.7 - 1.7.2308.7 (69e54e2); dxil.dll: 1.7(101.7.2308.12)
  • Host Operating System Windows 10

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by comparing the additional outputs introduced in PR #5678 with the IDxcLinker::Link result and the IDxcResult::GetOutput entry point. Reproduce the -Zi and -Qstrip_debug case, then verify that GetOutput(DXC_OUT_PDB, ...) succeeds for the linker result.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
compilers
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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