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