| 1 | // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O0 %s -o %t && not %run %t >%t.out 2>&1 |
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| 2 | // RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-%short-stack %s < %t.out |
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| 3 | // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O2 %s -o %t && not %run %t >%t.out 2>&1 |
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| 4 | // RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-%short-stack %s < %t.out |
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| 5 | |
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| 6 | // This is a regression test: there used to be broken "stored to memory at" |
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| 7 | // stacks with |
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| 8 | // in __msan_memcpy |
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| 9 | // in __msan::MsanReallocate |
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| 10 | // and nothing below that. |
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| 11 | |
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| 12 | #include <stdlib.h> |
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| 13 | int main(int argc, char **argv) { |
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| 14 | char *p = (char *)malloc(size: 100); |
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| 15 | p = (char *)realloc(ptr: p, size: 10000); |
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| 16 | char x = p[50]; |
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| 17 | free(ptr: p); |
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| 18 | return x; |
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| 19 | |
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| 20 | // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value |
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| 21 | // CHECK: {{#0 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-3]] |
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| 22 | |
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| 23 | // CHECK: Uninitialized value was stored to memory at |
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| 24 | // CHECK-FULL-STACK: {{#0 0x.* in .*realloc}} |
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| 25 | // CHECK-FULL-STACK: {{#1 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-10]] |
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| 26 | // CHECK-SHORT-STACK: {{#0 0x.* in .*realloc}} |
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| 27 | |
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| 28 | // CHECK: Uninitialized value was created by a heap allocation |
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| 29 | // CHECK: {{#0 0x.* in .*malloc}} |
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| 30 | // CHECK: {{#1 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-16]] |
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| 31 | } |
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| 32 | |
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