37 lines
1005 B
C++
37 lines
1005 B
C++
// RUN: %clangxx_msan -fexceptions -fsanitize-memory-track-origins=2 -latomic -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-SHADOW
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// PPC has no libatomic
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// UNSUPPORTED: powerpc64-target-arch
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// UNSUPPORTED: powerpc64le-target-arch
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#include <sanitizer/msan_interface.h>
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#include <stdatomic.h>
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typedef struct __attribute((packed)) {
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uint8_t val[3];
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} i24;
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void copy(i24 *dst, i24 *src);
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int main() {
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i24 uninit;
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i24 init = {0};
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__msan_check_mem_is_initialized(&init, 3);
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copy(&init, &uninit);
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__msan_check_mem_is_initialized(&init, 3);
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}
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void copy(i24 *dst, i24 *src) {
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try {
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__atomic_load(src, dst, __ATOMIC_RELAXED);
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} catch (...) {
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}
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}
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// CHECK: MemorySanitizer: use-of-uninitialized-value
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// CHECK: #0 {{0x[a-f0-9]+}} in main{{.*}}libatomic_load_exceptions.cpp:[[@LINE-11]]
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// CHECK-SHADOW: Uninitialized value was stored to memory at
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// CHECK-SHADOW: #0 {{0x[a-f0-9]+}} in copy{{.*}}libatomic_load_exceptions.cpp:[[@LINE-9]]
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