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Disable MSAn for lapack_LU

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One of the arguments is sent to Fortran so the whole function has
to be disabled fro MSAN. Arguments cannot be unpoisoned, cf
https://g3doc.corp.google.com/testing/msan/g3doc/index.md?cl=head#memorysanitizer-api
This commit is contained in:
Vincent Rabaud
2025-12-08 21:53:53 +01:00
parent c25e48249f
commit 01f2f3c4b9
1 changed files with 4 additions and 1 deletions
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5
modules/core/src/hal_internal.cpp
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@@ -69,10 +69,12 @@
#include <sanitizer/msan_interface.h>
#define CV_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
__msan_unpoison(address, size)
#define CV_ANNOTATE_NO_SANITIZE_MEMORY __attribute__((no_sanitize("memory")))
#endif
#endif
#ifndef CV_ANNOTATE_MEMORY_IS_INITIALIZED
#define CV_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) do { } while(0)
#define CV_ANNOTATE_NO_SANITIZE_MEMORY
#endif
//lapack stores matrices in column-major order so transposing is needed everywhere
@@ -108,8 +110,9 @@ set_value(fptype *dst, size_t dst_ld, fptype value, size_t m, size_t n)
dst[i*dst_ld + j] = value;
}
// MSAN can't see that the fortran LAPACK functions initialize `info`
template <typename fptype> static inline int
lapack_LU(fptype* a, size_t a_step, int m, fptype* b, size_t b_step, int n, int* info)
CV_ANNOTATE_NO_SANITIZE_MEMORY lapack_LU(fptype* a, size_t a_step, int m, fptype* b, size_t b_step, int n, int* info)
{
#if defined (ACCELERATE_NEW_LAPACK) && defined (ACCELERATE_LAPACK_ILP64)
cv::AutoBuffer<long> piv_buff(m);