22 lines · cpp
1// RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&12// RUN: FileCheck %s < %t.out3// RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t >%t.out 2>&14// RUN: FileCheck %s < %t.out5 6// This test relies on realloc from 100 to 101 being done in-place.7 8#include <stdlib.h>9int 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-value16 // CHECK: {{#0 0x.* in main .*realloc-origin.cpp:}}[[@LINE-2]]17 18 // CHECK: Uninitialized value was created by a heap allocation19 // CHECK: {{#0 0x.* in .*realloc}}20 // CHECK: {{#1 0x.* in main .*realloc-origin.cpp:}}[[@LINE-9]]21}22