test/msan/insertvalue_origin.cc

   1 // RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -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 -m64 -O3 %s -o %t && not %run %t >%t.out 2>&1
   4 // RUN: FileCheck %s < %t.out && FileCheck %s < %t.out
   5
   6 // Test origin propagation through insertvalue IR instruction.
   7
   8 #include <stdio.h>
   9 #include <stdint.h>
  10
  11 struct mypair {
  12  int64_t x;
  13  int y;
  14 };
  15
  16 mypair my_make_pair(int64_t x, int y)  {
  17  mypair p;
  18  p.x = x;
  19  p.y = y;
  20  return p;
  21 }
  22
  23 int main() {
  24  int64_t * volatile p = new int64_t;
  25  mypair z = my_make_pair(*p, 0);
  26  if (z.x)
  27    printf("zzz\n");
  28  // CHECK: MemorySanitizer: use-of-uninitialized-value
  29  // CHECK: {{in main .*insertvalue_origin.cc:}}[[@LINE-3]]
  30
  31  // CHECK: Uninitialized value was created by a heap allocation
  32  // CHECK: {{in main .*insertvalue_origin.cc:}}[[@LINE-8]]
  33  delete p;
  34  return 0;
  35 }