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