compiler-rt/test/asan/TestCases/Linux/stack-overflow-recovery-mode.cpp

   1 // Test that ASan doesn't hang on stack overflow in recovery mode.
   2 //
   3 // RUN: %clang_asan -O0 -fsanitize-recover=address %s -o %t
   4 // RUN: %env_asan_opts=halt_on_error=false not %run %t 2>&1 | FileCheck %s
   5
   6 #include <assert.h>
   7 #include <unistd.h>
   8 #include <sys/mman.h>
   9 #include <sys/resource.h>
  10
  11 static volatile int *recurse(volatile int n, volatile int *p) {
  12   // CHECK: {{stack-overflow on address 0x.* \(pc 0x.* bp 0x.* sp 0x.* T.*\)}}
  13   if (n >= 0) *recurse(n + 1, p) += n;
  14   return p;
  15 }
  16
  17
  18 void LimitStackAndReexec(int argc, char **argv) {
  19   struct rlimit rlim;
  20   int res = getrlimit(RLIMIT_STACK, &rlim);
  21   assert(res == 0);
  22   if (rlim.rlim_cur == RLIM_INFINITY) {
  23     rlim.rlim_cur = 256 * 1024;
  24     res = setrlimit(RLIMIT_STACK, &rlim);
  25     assert(res == 0);
  26
  27     execv(argv[0], argv);
  28     assert(0 && "unreachable");
  29   }
  30 }
  31
  32 int main(int argc, char **argv) {
  33   LimitStackAndReexec(argc, argv);
  34   volatile int res;
  35   return *recurse(argc + 1, &res);
  36 }