32 lines
1.2 KiB
C++
32 lines
1.2 KiB
C++
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O0 %s -o %t && not %run %t >%t.out 2>&1
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// RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-%short-stack %s < %t.out
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// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O2 %s -o %t && not %run %t >%t.out 2>&1
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// RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-%short-stack %s < %t.out
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// This is a regression test: there used to be broken "stored to memory at"
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// stacks with
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// in __msan_memcpy
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// in __msan::MsanReallocate
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// and nothing below that.
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#include <stdlib.h>
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int main(int argc, char **argv) {
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char *p = (char *)malloc(100);
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p = (char *)realloc(p, 10000);
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char x = p[50];
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free(p);
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return x;
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// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
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// CHECK: {{#0 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-3]]
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// CHECK: Uninitialized value was stored to memory at
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// CHECK-FULL-STACK: {{#0 0x.* in .*realloc}}
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// CHECK-FULL-STACK: {{#1 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-10]]
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// CHECK-SHORT-STACK: {{#0 0x.* in .*realloc}}
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// CHECK: Uninitialized value was created by a heap allocation
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// CHECK: {{#0 0x.* in .*malloc}}
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// CHECK: {{#1 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-16]]
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}
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