compiler-rt/test/asan/TestCases/Windows/use_after_realloc.cpp

   1 // RUN: %clang_cl_asan %Od %s %Fe%t
   2 // RUN: not %run %t 2>&1 | FileCheck %s
   3
   4 #include <malloc.h>
   5
   6 int main() {
   7   char *buffer = (char*)realloc(0, 32),
   8        *stale = buffer;
   9   buffer = (char*)realloc(buffer, 64);
  10   // The 'stale' may now point to a free'd memory.
  11   stale[0] = 42;
  12   // CHECK: AddressSanitizer: heap-use-after-free on address [[ADDR:0x[0-9a-f]+]]
  13   // CHECK: WRITE of size 1 at [[ADDR]] thread T0
  14   // CHECK-NEXT: {{#0 .* main .*use_after_realloc.cpp}}:[[@LINE-3]]
  15   // CHECK: [[ADDR]] is located 0 bytes inside of 32-byte region
  16   // CHECK: freed by thread T0 here:
  17   // CHECK-NEXT: {{#0 .* realloc }}
  18   // CHECK: {{ #[1-3] .* main .*use_after_realloc.cpp}}:[[@LINE-9]]
  19   // CHECK: previously allocated by thread T0 here:
  20   // CHECK-NEXT: {{#0 .* realloc }}
  21   // CHECK: {{ #[1-3] .* main .*use_after_realloc.cpp}}:[[@LINE-14]]
  22   free(buffer);
  23 }