compiler-rt/test/msan/dso-origin.cpp

   1 // Build a library with origin tracking and an executable w/o origin tracking.
   2 // Test that origin tracking is enabled at runtime.
   3 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -DBUILD_SO -fPIC -shared -o %t-so.so
   4 // RUN: %clangxx_msan -O0 %s %t-so.so -o %t && not %run %t 2>&1 | FileCheck %s
   5
   6 #ifdef BUILD_SO
   7
   8 #include <stdlib.h>
   9
  10 extern "C" {
  11 void my_access(int *p) {
  12   volatile int tmp;
  13   // Force initialize-ness check.
  14   if (*p)
  15     tmp = 1;
  16 }
  17
  18 void *my_alloc(unsigned sz) {
  19   return malloc(sz);
  20 }
  21 }  // extern "C"
  22
  23 #else  // BUILD_SO
  24
  25 #include <stdlib.h>
  26
  27 extern "C" {
  28 void my_access(int *p);
  29 void *my_alloc(unsigned sz);
  30 }
  31
  32 int main(int argc, char **argv) {
  33   int *x = (int *)my_alloc(sizeof(int));
  34   my_access(x);
  35   delete x;
  36
  37   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  38   // CHECK: {{#0 0x.* in my_access .*dso-origin.cpp:}}
  39   // CHECK: {{#1 0x.* in main .*dso-origin.cpp:}}[[@LINE-5]]
  40   // CHECK: Uninitialized value was created by a heap allocation
  41   // CHECK: {{#0 0x.* in .*malloc}}
  42   // CHECK: {{#1 0x.* in my_alloc .*dso-origin.cpp:}}
  43   // CHECK: {{#2 0x.* in main .*dso-origin.cpp:}}[[@LINE-10]]
  44   // CHECK: SUMMARY: MemorySanitizer: use-of-uninitialized-value {{.*dso-origin.cpp:.* my_access}}
  45   return 0;
  46 }
  47
  48 #endif  // BUILD_SO