test/asan/TestCases/uar_and_exceptions.cc

   1 // Test that use-after-return works with exceptions.
   2 // export ASAN_OPTIONS=detect_stack_use_after_return=1
   3 // RUN: %clangxx_asan  -O0 %s -o %t && %t
   4
   5 #include <stdio.h>
   6
   7 volatile char *g;
   8
   9 #ifndef FRAME_SIZE
  10 # define FRAME_SIZE 100
  11 #endif
  12
  13 #ifndef NUM_ITER
  14 # define NUM_ITER 4000
  15 #endif
  16
  17 #ifndef DO_THROW
  18 # define DO_THROW 1
  19 #endif
  20
  21 void Func(int depth) {
  22   char frame[FRAME_SIZE];
  23   g = &frame[0];
  24   if (depth)
  25     Func(depth - 1);
  26   else if (DO_THROW)
  27     throw 1;
  28 }
  29
  30 int main(int argc, char **argv) {
  31   for (int i = 0; i < NUM_ITER; i++) {
  32     try {
  33       Func(argc * 100);
  34     } catch(...) {
  35     }
  36     if ((i % (NUM_ITER / 10)) == 0)
  37       fprintf(stderr, "done [%d]\n", i);
  38   }
  39   return 0;
  40 }