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 // REQUIRES: stable-runtime
6
7 // Stack histories currently are not recorded on x86.
8 // XFAIL: x86_64
9
USE(void * x)10 void USE(void *x) { // pretend_to_do_something(void *x)
11 __asm__ __volatile__("" : : "r" (x) : "memory");
12 }
13
14 __attribute__((noinline))
buggy()15 char *buggy() {
16 char zzz[0x1000];
17 char *volatile p = zzz;
18 return p;
19 }
20
Unrelated1()21 __attribute__((noinline)) void Unrelated1() { int A[2]; USE(&A[0]); }
Unrelated2()22 __attribute__((noinline)) void Unrelated2() { int BB[3]; USE(&BB[0]); }
Unrelated3()23 __attribute__((noinline)) void Unrelated3() { int CCC[4]; USE(&CCC[0]); }
24
main()25 int main() {
26 char *p = buggy();
27 Unrelated1();
28 Unrelated2();
29 Unrelated3();
30 return *p;
31 // CHECK: READ of size 1 at
32 // CHECK: #0 {{.*}} in main{{.*}}stack-uar.c:[[@LINE-2]]
33 // CHECK: Cause: stack tag-mismatch
34 // CHECK: is located in stack of thread
35 // CHECK: Potentially referenced stack objects:
36 // CHECK-NEXT: zzz in buggy {{.*}}stack-uar.c:[[@LINE-20]]
37 // CHECK-NEXT: Memory tags around the buggy address
38
39 // NOSYM: Previously allocated frames:
40 // NOSYM-NEXT: record_addr:0x{{.*}} record:0x{{.*}} ({{.*}}/stack-uar.c.tmp+0x{{.*}}){{$}}
41 // NOSYM-NEXT: record_addr:0x{{.*}} record:0x{{.*}} ({{.*}}/stack-uar.c.tmp+0x{{.*}}){{$}}
42 // NOSYM-NEXT: record_addr:0x{{.*}} record:0x{{.*}} ({{.*}}/stack-uar.c.tmp+0x{{.*}}){{$}}
43 // NOSYM-NEXT: record_addr:0x{{.*}} record:0x{{.*}} ({{.*}}/stack-uar.c.tmp+0x{{.*}}){{$}}
44 // NOSYM-NEXT: Memory tags around the buggy address
45
46 // CHECK: SUMMARY: HWAddressSanitizer: tag-mismatch {{.*}} in main
47 }
48