lib/msan/lit_tests/use-after-free.cc

   1 // RUN: %clangxx_msan -m64 -O0 %s -o %t && not %t >%t.out 2>&1
   2 // RUN: FileCheck %s < %t.out
   3 // RUN: %clangxx_msan -m64 -O1 %s -o %t && not %t >%t.out 2>&1
   4 // RUN: FileCheck %s < %t.out
   5 // RUN: %clangxx_msan -m64 -O2 %s -o %t && not %t >%t.out 2>&1
   6 // RUN: FileCheck %s < %t.out
   7 // RUN: %clangxx_msan -m64 -O3 %s -o %t && not %t >%t.out 2>&1
   8 // RUN: FileCheck %s < %t.out
   9
  10 // RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O0 %s -o %t && not %t >%t.out 2>&1
  11 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  12 // RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O1 %s -o %t && not %t >%t.out 2>&1
  13 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  14 // RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O2 %s -o %t && not %t >%t.out 2>&1
  15 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  16 // RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O3 %s -o %t && not %t >%t.out 2>&1
  17 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  18
  19 #include <stdlib.h>
  20 int main(int argc, char **argv) {
  21   int *volatile p = (int *)malloc(sizeof(int));
  22   *p = 42;
  23   free(p);
  24
  25   if (*p)
  26     exit(0);
  27   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  28   // CHECK: {{#0 0x.* in main .*use-after-free.cc:}}[[@LINE-3]]
  29
  30   // CHECK-ORIGINS: Uninitialized value was created by a heap allocation
  31   // CHECK-ORIGINS: {{#0 0x.* in .*free}}
  32   // CHECK-ORIGINS: {{#1 0x.* in main .*use-after-free.cc:}}[[@LINE-9]]
  33   return 0;
  34 }