microsoft / microsoft/wdkmetadata
Inconsistent alignment of `CM_PARTIAL_RESOURCE_DESCRIPTOR` structure
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- Dominant language
- C++
- Stars
- 110
- Forks
- 15
- PR merge metrics
- No merged PRs in 30d
Description
Summary
The CM_PARTIAL_RESOURCE_DESCRIPTOR structure is currently missing the #[repr(C, packed(4))] attribute, which is necessary to ensure 4-byte alignment on x86_64 targets. This issue leads to the CM_PARTIAL_RESOURCE_LIST structure having a size of 32 bytes instead of the expected 28 bytes.
In wdm.h of the WDK, the definition of CM_PARTIAL_RESOURCE_DESCRIPTOR is currently preceded by a
#include "pshpack4.h"
directive, which ensures the correct alignment.
Crate manifest
[dependencies.windows]
version = "0.54.0"
features = ["Wdk", "Wdk_System", "Wdk_System_SystemServices"]
Crate code
No response
Contributor guide
First steps
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Research direction
Start by comparing the generated CM_PARTIAL_RESOURCE_DESCRIPTOR and CM_PARTIAL_RESOURCE_LIST definitions with the corresponding declaration in wdm.h, including the nearby pshpack4.h directive. Verify the resulting CM_PARTIAL_RESOURCE_LIST size against the expected 28 bytes on x86_64; done means the generated structure has the required 4-byte alignment and the size is corrected.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp, rust
- Domain
- operating-systems
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100