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

   1 // Tests use-after-return detection and reporting.
   2 // RUN: %clang_hwasan -g %s -o %t && not %run %t 2>&1 | FileCheck %s
   3 // RUN: %clang_hwasan -g %s -o %t && not %env_hwasan_opts=symbolize=0 %run %t 2>&1 | FileCheck %s --check-prefix=NOSYM
   4
   5 // Run the same test as above, but using the __hwasan_add_frame_record libcall.
   6 // The output should be the exact same.
   7 // RUN: %clang_hwasan -g %s -o %t -mllvm -hwasan-record-stack-history=libcall && not %env_hwasan_opts=symbolize=0 %run %t 2>&1 | FileCheck %s --check-prefix=NOSYM
   8
   9 // REQUIRES: stable-runtime
  10
  11 // Stack histories currently are not recorded on x86.
  12 // XFAIL: x86_64
  13
  14 void USE(void *x) { // pretend_to_do_something(void *x)
  15   __asm__ __volatile__("" : : "r" (x) : "memory");
  16 }
  17
  18 __attribute__((noinline))
  19 char *buggy() {
  20   char zzz[0x1000];
  21   char *volatile p = zzz;
  22   return p;
  23 }
  24
  25 __attribute__((noinline)) void Unrelated1() { int A[2]; USE(&A[0]); }
  26 __attribute__((noinline)) void Unrelated2() { int BB[3]; USE(&BB[0]); }
  27 __attribute__((noinline)) void Unrelated3() { int CCC[4]; USE(&CCC[0]); }
  28
  29 int main() {
  30   char *p = buggy();
  31   Unrelated1();
  32   Unrelated2();
  33   Unrelated3();
  34   return *p;
  35   // CHECK: READ of size 1 at
  36   // CHECK: #0 {{.*}} in main{{.*}}stack-uar.c:[[@LINE-2]]
  37   // CHECK: Cause: stack tag-mismatch
  38   // CHECK: is located in stack of thread
  39   // CHECK: Potentially referenced stack objects:
  40   // CHECK-NEXT: zzz in buggy {{.*}}stack-uar.c:[[@LINE-20]]
  41   // CHECK-NEXT: Memory tags around the buggy address
  42
  43   // NOSYM: Previously allocated frames:
  44   // NOSYM-NEXT: record_addr:0x{{.*}} record:0x{{.*}} ({{.*}}/stack-uar.c.tmp+0x{{.*}}){{$}}
  45   // NOSYM-NEXT: record_addr:0x{{.*}} record:0x{{.*}} ({{.*}}/stack-uar.c.tmp+0x{{.*}}){{$}}
  46   // NOSYM-NEXT: record_addr:0x{{.*}} record:0x{{.*}} ({{.*}}/stack-uar.c.tmp+0x{{.*}}){{$}}
  47   // NOSYM-NEXT: record_addr:0x{{.*}} record:0x{{.*}} ({{.*}}/stack-uar.c.tmp+0x{{.*}}){{$}}
  48   // NOSYM-NEXT: Memory tags around the buggy address
  49
  50   // CHECK: SUMMARY: HWAddressSanitizer: tag-mismatch {{.*}} in main
  51 }