compiler-rt/test/hwasan/TestCases/stack-uar-realign.c

   1 // RUN: %clang_hwasan -g %s -o %t && not %run %t 2>&1 | FileCheck %s
   2
   3 // Dynamic stack realignment causes debug info locations to use non-FP-relative
   4 // offsets because stack frames are realigned below FP, which means that we
   5 // can't associate addresses with stack objects in this case. Ideally we should
   6 // be able to handle this case somehow (e.g. by using a different register for
   7 // DW_AT_frame_base) but at least we shouldn't get confused by it.
   8
   9 // REQUIRES: pointer-tagging
  10
  11 __attribute((noinline))
  12 char *buggy() {
  13   _Alignas(64) char c[64];
  14   char *volatile p = c;
  15   return p;
  16 }
  17
  18 int main() {
  19   char *p = buggy();
  20   // CHECK-NOT: Potentially referenced stack objects:
  21   p[0] = 0;
  22 }