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// 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 %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_asan -O2 %s -o %t && ASAN_OPTIONS=allow_user_segv_handler=true not %run %t 2>&1 | FileCheck %s
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
struct sigaction original_sigaction_sigbus;
struct sigaction original_sigaction_sigsegv;
void User_OnSIGSEGV(int signum, siginfo_t *siginfo, void *context) {
fprintf(stderr, "User sigaction called\n");
struct sigaction original_sigaction;
if (signum == SIGBUS)
original_sigaction = original_sigaction_sigbus;
else if (signum == SIGSEGV)
original_sigaction = original_sigaction_sigsegv;
else {
printf("Invalid signum");
exit(1);
}
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 InstallHandler(int signum, struct sigaction *original_sigaction) {
struct sigaction user_sigaction;
user_sigaction.sa_sigaction = User_OnSIGSEGV;
user_sigaction.sa_flags = SA_SIGINFO;
if (sigaction(signum, &user_sigaction, original_sigaction)) {
perror("sigaction");
return 1;
}
return 0;
}
int main() {
// Let's install handlers for both SIGSEGV and SIGBUS, since pre-Yosemite
// 32-bit Darwin triggers SIGBUS instead.
if (InstallHandler(SIGSEGV, &original_sigaction_sigsegv)) return 1;
if (InstallHandler(SIGBUS, &original_sigaction_sigbus)) 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
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