forked from OSchip/llvm-project
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
// RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1
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// RUN: FileCheck %s < %t.out && FileCheck %s < %t.out
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// XFAIL: mips
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#include <assert.h>
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#include <wchar.h>
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#include <sanitizer/msan_interface.h>
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int main() {
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const wchar_t *s = L"abc";
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assert(wcslen(s) == 3);
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wchar_t s2[5];
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assert(wcsncpy(s2, s, 3) == s2);
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assert(__msan_test_shadow(&s2, 5 * sizeof(wchar_t)) == 3 * sizeof(wchar_t));
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assert(wcsncpy(s2, s, 5) == s2);
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assert(__msan_test_shadow(&s2, 5 * sizeof(wchar_t)) == -1);
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wchar_t s3[5];
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assert(wcsncpy(s3, s, 2) == s3);
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assert(__msan_test_shadow(&s3, 5 * sizeof(wchar_t)) == 2 * sizeof(wchar_t));
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__msan_allocated_memory(&s2[1], sizeof(wchar_t));
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wchar_t s4[5];
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assert(wcsncpy(s4, s2, 3) == s4);
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__msan_check_mem_is_initialized(&s4, sizeof(s4));
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}
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// CHECK: Uninitialized bytes in __msan_check_mem_is_initialized
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// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
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// CHECK: in main {{.*}}wcsncpy.cpp:28
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// CHECK: Uninitialized value was stored to memory at
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// CHECK: in {{[^\s]*}}wcsncpy
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// CHECK: in main {{.*}}wcsncpy.cpp:27
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// CHECK: Memory was marked as uninitialized
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// CHECK: in __msan_allocated_memory
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// CHECK: in main {{.*}}wcsncpy.cpp:25
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