compiler-rt/test/sanitizer_common/TestCases/onprint.cpp

   1 // Checks that the __sanitizer_on_print hook gets the exact same sanitizer
   2 // report as what is printed to stderr.
   3 //
   4 // RUN: %clangxx %s -o %t
   5 // RUN: %run %t %t-onprint.txt 2>%t-stderr.txt || true
   6 // RUN: diff %t-onprint.txt %t-stderr.txt
   7 //
   8 // UNSUPPORTED: android
   9
  10 #include <cassert>
  11 #include <cstdlib>
  12 #include <fcntl.h>
  13 #include <string.h>
  14 #include <sys/stat.h>
  15 #include <sys/types.h>
  16 #include <unistd.h>
  17
  18 int f;
  19 volatile void *buf;
  20 volatile char sink;
  21
  22 __attribute__((disable_sanitizer_instrumentation)) extern "C" void
  23 __sanitizer_on_print(const char *str) {
  24   write(f, str, strlen(str));
  25 }
  26
  27 int main(int argc, char *argv[]) {
  28   assert(argc >= 2);
  29   f = open(argv[1], O_CREAT | O_TRUNC | O_WRONLY, 0666);
  30
  31   // Use-after-free to trigger ASan/TSan reports.
  32   void *ptr = malloc(1);
  33   buf = ptr;
  34   free(ptr);
  35   sink = *static_cast<char *>(ptr);
  36   return 0;
  37 }