src/compiler-rt/test/asan/TestCases/deep_stack_uaf.cc

   1 // Check that we can store lots of stack frames if asked to.
   2
   3 // RUN: %clangxx_asan -O0 %s -o %t 2>&1
   4 // RUN: %env_asan_opts=malloc_context_size=120:redzone=512 not %run %t 2>&1 | FileCheck %s
   5 // XFAIL: arm-linux-gnueabi
   6 // XFAIL: armv7l-unknown-linux-gnueabihf
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9
  10 template <int depth>
  11 struct DeepFree {
  12   static void free(char *x) {
  13     DeepFree<depth - 1>::free(x);
  14   }
  15 };
  16
  17 template<>
  18 struct DeepFree<0> {
  19   static void free(char *x) {
  20     ::free(x);
  21   }
  22 };
  23
  24 int main() {
  25   char *x = (char*)malloc(10);
  26   // deep_free(x);
  27   DeepFree<200>::free(x);
  28   return x[5];
  29   // CHECK: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}}
  30   // The libcxxrt demangling procedure on FreeBSD 9.2 incorrectly appends
  31   // extra 'E' characters to the end of template arguments; see:
  32   // https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192115
  33   // CHECK: {{DeepFree<36>|DeepFree<36E>}}
  34   // CHECK: {{DeepFree<98>|DeepFree<98E>}}
  35   // CHECK: {{DeepFree<115>|DeepFree<115E>}}
  36 }