microsoft / microsoft/DirectXShaderCompiler
[SPIR-V] Crash when using StructuredBuffer<int> inside a Struct and generating spirv with -fspv-debug=vulkan-with-source
Open
Nobody has claimed this yet.
bug
needs-triage
spirv
- Dominant language
- C++
- Stars
- 3.7k
- Forks
- 900
- Avg merge
- 2d 11h
- Merged PRs (30d)
- 44
Description
Description
Dxc crashes when calling lowerToDebugTypeComposite for StructuredBuffer. Decl with null value is returned.
Steps to Reproduce
https://godbolt.org/z/YoGT9158z
struct Data {
StructuredBuffer<int> IntBuffer;
};
[numthreads(64, 1, 1)]
void main(uint3 dtid : SV_DispatchThreadID) {
Data temp;
}
Actual Behavior
Program terminated with signal: SIGSEGV
Environment
Dxc Trunk
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the Godbolt reproducer and inspect the lowerToDebugTypeComposite entry point mentioned in the report, focusing on the StructuredBuffer nested in a struct with -fspv-debug=vulkan-with-source. Done means the reproducer no longer terminates with SIGSEGV during SPIR-V generation.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100