compiler-rt/test/msan/origin-store-long.cpp

   1 // Check that 8-byte store updates origin for the full store range.
   2 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1
   3 // RUN: FileCheck %s < %t.out && FileCheck %s < %t.out
   4 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t >%t.out 2>&1
   5 // RUN: FileCheck %s < %t.out && FileCheck %s < %t.out
   6
   7 #include <sanitizer/msan_interface.h>
   8
   9 int main() {
  10   uint64_t *volatile p = new uint64_t;
  11   uint64_t *volatile q = new uint64_t;
  12   *p = *q;
  13   char *z = (char *)p;
  14   return z[6];
  15 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  16 // CHECK:   in main {{.*}}origin-store-long.cpp:[[@LINE-2]]
  17
  18 // CHECK:  Uninitialized value was created by a heap allocation
  19 // CHECK:   in main {{.*}}origin-store-long.cpp:[[@LINE-8]]
  20 }
  21