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> 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
