1*d21b3d34SFangrui Song // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1
2*d21b3d34SFangrui Song // RUN: FileCheck %s < %t.out
3*d21b3d34SFangrui Song // RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t >%t.out 2>&1
4*d21b3d34SFangrui Song // RUN: FileCheck %s < %t.out
5*d21b3d34SFangrui Song 
6*d21b3d34SFangrui Song // This test relies on realloc from 100 to 101 being done in-place.
7*d21b3d34SFangrui Song 
8*d21b3d34SFangrui Song #include <stdlib.h>
main(int argc,char ** argv)9*d21b3d34SFangrui Song int main(int argc, char **argv) {
10*d21b3d34SFangrui Song   char *p = (char *)malloc(100);
11*d21b3d34SFangrui Song   p = (char *)realloc(p, 101);
12*d21b3d34SFangrui Song   char x = p[100];
13*d21b3d34SFangrui Song   free(p);
14*d21b3d34SFangrui Song   return x;
15*d21b3d34SFangrui Song   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
16*d21b3d34SFangrui Song   // CHECK: {{#0 0x.* in main .*realloc-origin.cpp:}}[[@LINE-2]]
17*d21b3d34SFangrui Song 
18*d21b3d34SFangrui Song   // CHECK: Uninitialized value was created by a heap allocation
19*d21b3d34SFangrui Song   // CHECK: {{#0 0x.* in .*realloc}}
20*d21b3d34SFangrui Song   // CHECK: {{#1 0x.* in main .*realloc-origin.cpp:}}[[@LINE-9]]
21*d21b3d34SFangrui Song }
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