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msan: Support free_sized and free_aligned_sized from C23 #144529

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Merged
merged 1 commit into from
Jun 20, 2025
Merged

msan: Support free_sized and free_aligned_sized from C23 #144529

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32 changes: 32 additions & 0 deletions compiler-rt/lib/msan/msan_interceptors.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@
#include "sanitizer_common/sanitizer_glibc_version.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "sanitizer_common/sanitizer_linux.h"
#include "sanitizer_common/sanitizer_platform_interceptors.h"
#include "sanitizer_common/sanitizer_platform_limits_netbsd.h"
#include "sanitizer_common/sanitizer_platform_limits_posix.h"
#include "sanitizer_common/sanitizer_stackdepot.h"
Expand Down Expand Up @@ -215,6 +216,35 @@ INTERCEPTOR(void, free, void *ptr) {
MsanDeallocate(&stack, ptr);
}

#if SANITIZER_INTERCEPT_FREE_SIZED
INTERCEPTOR(void, free_sized, void *ptr, uptr size) {
if (UNLIKELY(!ptr))
return;
if (DlsymAlloc::PointerIsMine(ptr))
return DlsymAlloc::Free(ptr);
GET_MALLOC_STACK_TRACE;
MsanDeallocate(&stack, ptr);
}
# define MSAN_MAYBE_INTERCEPT_FREE_SIZED INTERCEPT_FUNCTION(free_sized)
#else
# define MSAN_MAYBE_INTERCEPT_FREE_SIZED
#endif

#if SANITIZER_INTERCEPT_FREE_ALIGNED_SIZED
INTERCEPTOR(void, free_aligned_sized, void *ptr, uptr alignment, uptr size) {
if (UNLIKELY(!ptr))
return;
if (DlsymAlloc::PointerIsMine(ptr))
return DlsymAlloc::Free(ptr);
GET_MALLOC_STACK_TRACE;
MsanDeallocate(&stack, ptr);
}
# define MSAN_MAYBE_INTERCEPT_FREE_ALIGNED_SIZED \
INTERCEPT_FUNCTION(free_aligned_sized)
#else
# define MSAN_MAYBE_INTERCEPT_FREE_ALIGNED_SIZED
#endif

#if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
INTERCEPTOR(void, cfree, void *ptr) {
if (UNLIKELY(!ptr))
Expand Down Expand Up @@ -1775,6 +1805,8 @@ void InitializeInterceptors() {
INTERCEPT_FUNCTION(realloc);
INTERCEPT_FUNCTION(reallocarray);
INTERCEPT_FUNCTION(free);
MSAN_MAYBE_INTERCEPT_FREE_SIZED;
MSAN_MAYBE_INTERCEPT_FREE_ALIGNED_SIZED;
MSAN_MAYBE_INTERCEPT_CFREE;
MSAN_MAYBE_INTERCEPT_MALLOC_USABLE_SIZE;
MSAN_MAYBE_INTERCEPT_MALLINFO;
Expand Down
2 changes: 1 addition & 1 deletion compiler-rt/test/sanitizer_common/TestCases/Linux/free_aligned_sized.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
// RUN: %clang -std=c23 -O0 %s -o %t && %run %t
// UNSUPPORTED: asan, hwasan, rtsan, tsan, msan, ubsan
// UNSUPPORTED: asan, hwasan, rtsan, tsan, ubsan

#include <stddef.h>
#include <stdlib.h>
Expand Down
2 changes: 1 addition & 1 deletion compiler-rt/test/sanitizer_common/TestCases/Linux/free_sized.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
// RUN: %clang -std=c23 -O0 %s -o %t && %run %t
// UNSUPPORTED: asan, hwasan, rtsan, tsan, msan, ubsan
// UNSUPPORTED: asan, hwasan, rtsan, tsan, ubsan

#include <stddef.h>
#include <stdlib.h>
Expand Down
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