| 1 | // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1 |
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| 2 | // RUN: FileCheck %s < %t.out |
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| 3 | // RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t >%t.out 2>&1 |
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| 4 | // RUN: FileCheck %s < %t.out |
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| 5 | |
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| 6 | // This test relies on realloc from 100 to 101 being done in-place. |
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| 7 | |
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| 8 | #include <stdlib.h> |
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| 9 | int main(int argc, char **argv) { |
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| 10 | char *p = (char *)malloc(size: 100); |
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| 11 | p = (char *)realloc(ptr: p, size: 101); |
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| 12 | char x = p[100]; |
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| 13 | free(ptr: p); |
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| 14 | return x; |
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| 15 | // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value |
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| 16 | // CHECK: {{#0 0x.* in main .*realloc-origin.cpp:}}[[@LINE-2]] |
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| 17 | |
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| 18 | // CHECK: Uninitialized value was created by a heap allocation |
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| 19 | // CHECK: {{#0 0x.* in .*realloc}} |
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| 20 | // CHECK: {{#1 0x.* in main .*realloc-origin.cpp:}}[[@LINE-9]] |
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| 21 | } |
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| 22 | |
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