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 } 52