compiler-rt/test/msan/unaligned_read_origin.cpp

   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 && FileCheck %s < %t.out
   3 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O3 %s -o %t && not %run %t >%t.out 2>&1
   4 // RUN: FileCheck %s < %t.out && FileCheck %s < %t.out
   5
   6 #include <sanitizer/msan_interface.h>
   7
   8 int main(int argc, char **argv) {
   9   int x;
  10   int *volatile p = &x;
  11   return __sanitizer_unaligned_load32(p);
  12   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  13   // CHECK: {{#0 0x.* in main .*unaligned_read_origin.cpp:}}[[@LINE-2]]
  14   // CHECK: Uninitialized value was created by an allocation of 'x' in the stack frame
  15   // CHECK: {{#0 0x.* in main .*unaligned_read_origin.cpp:}}[[@LINE-6]]
  16 }