| // Regression test for |
| // https://code.google.com/p/address-sanitizer/issues/detail?id=180 |
| |
| // RUN: %clangxx_asan -O0 %s -o %t && ASAN_OPTIONS=allow_user_segv_handler=true not %t 2>&1 | FileCheck %s |
| // RUN: %clangxx_asan -O2 %s -o %t && ASAN_OPTIONS=allow_user_segv_handler=true not %t 2>&1 | FileCheck %s |
| |
| #include <signal.h> |
| #include <stdio.h> |
| |
| struct sigaction user_sigaction; |
| struct sigaction original_sigaction; |
| |
| void User_OnSIGSEGV(int signum, siginfo_t *siginfo, void *context) { |
| fprintf(stderr, "User sigaction called\n"); |
| if (original_sigaction.sa_flags | SA_SIGINFO) |
| original_sigaction.sa_sigaction(signum, siginfo, context); |
| else |
| original_sigaction.sa_handler(signum); |
| } |
| |
| int DoSEGV() { |
| volatile int *x = 0; |
| return *x; |
| } |
| |
| int main() { |
| user_sigaction.sa_sigaction = User_OnSIGSEGV; |
| user_sigaction.sa_flags = SA_SIGINFO; |
| #if defined(__APPLE__) && !defined(__LP64__) |
| // On 32-bit Darwin KERN_PROTECTION_FAILURE (SIGBUS) is delivered. |
| int signum = SIGBUS; |
| #else |
| // On 64-bit Darwin KERN_INVALID_ADDRESS (SIGSEGV) is delivered. |
| // On Linux SIGSEGV is delivered as well. |
| int signum = SIGSEGV; |
| #endif |
| if (sigaction(signum, &user_sigaction, &original_sigaction)) { |
| perror("sigaction"); |
| return 1; |
| } |
| fprintf(stderr, "User sigaction installed\n"); |
| return DoSEGV(); |
| } |
| |
| // CHECK: User sigaction installed |
| // CHECK-NEXT: User sigaction called |
| // CHECK-NEXT: ASAN:SIGSEGV |
| // CHECK: AddressSanitizer: SEGV on unknown address |