compiler-rt/test/hwasan/TestCases/stack-underflow.c

   1 // RUN: %clang_hwasan -g %s -o %t && not %run %t 2>&1 | FileCheck %s
   2
   3 // Stack histories currently are not recorded on x86.
   4 // XFAIL: target=x86_64{{.*}}
   5
   6 __attribute((noinline)) void buggy() {
   7   char c[64];
   8   char *volatile p = c;
   9   p[-2] = 0;
  10 }
  11
  12 int main() {
  13   buggy();
  14   // CHECK: WRITE of size 1 at
  15   // CHECK: #0 {{.*}} in buggy{{.*}}stack-underflow.c:[[@LINE-6]]
  16   // CHECK: Cause: stack tag-mismatch
  17   // CHECK: is located in stack of thread
  18   // CHECK: Potentially referenced stack objects:
  19   // CHECK: Cause: stack-buffer-overflow
  20   // CHECK-NEXT: 0x{{.*}} is located 2 bytes before a 64-byte local variable c [0x{{.*}},0x{{.*}}) in buggy {{.*}}stack-underflow.c:
  21   // CHECK: Memory tags around the buggy address
  22
  23   // CHECK: SUMMARY: HWAddressSanitizer: tag-mismatch {{.*}} in buggy
  24 }