| 1 | // RUN: %clangxx_msan %s -o %t && not %run %t 2>&1 | FileCheck --check-prefix=ON %s |
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| 2 | // RUN: %clangxx_msan %s -o %t && env MSAN_OPTIONS=intercept_strndup=0 %run %t 2>&1 | FileCheck --check-prefix=OFF --allow-empty %s |
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| 3 | |
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| 4 | // When built as C on Linux, strndup is transformed to __strndup. |
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| 5 | // RUN: %clangxx_msan -O3 -xc %s -o %t && not %run %t 2>&1 | FileCheck --check-prefix=ON %s |
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| 6 | |
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| 7 | // UNSUPPORTED: target={{.*windows-msvc.*}} |
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| 8 | |
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| 9 | #include <assert.h> |
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| 10 | #include <stdlib.h> |
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| 11 | #include <string.h> |
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| 12 | #include <sanitizer/msan_interface.h> |
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| 13 | |
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| 14 | int main(int argc, char **argv) { |
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| 15 | char kString[4] = "abc" ; |
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| 16 | __msan_poison(a: kString + 2, size: 1); |
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| 17 | char *copy = strndup(string: kString, n: 4); // BOOM |
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| 18 | assert(__msan_test_shadow(copy, 4) == 2); // Poisoning is preserved. |
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| 19 | free(ptr: copy); |
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| 20 | return 0; |
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| 21 | // ON: Uninitialized bytes in {{(__)?}}strndup at offset 2 inside [{{.*}}, 4) |
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| 22 | // ON: MemorySanitizer: use-of-uninitialized-value |
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| 23 | // ON: #0 {{.*}}main {{.*}}strndup.cpp:[[@LINE-6]] |
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| 24 | // ON-LABEL: SUMMARY |
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| 25 | // ON: {{.*}}strndup.cpp:[[@LINE-8]] |
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| 26 | // OFF-NOT: MemorySanitizer |
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| 27 | } |
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| 28 | |
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| 29 | |
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