60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// Regression test for
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// https://code.google.com/p/address-sanitizer/issues/detail?id=180
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// RUN: %clangxx_asan -O0 %s -o %t && %env_asan_opts=allow_user_segv_handler=true not %run %t 2>&1 | FileCheck %s
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// RUN: %clangxx_asan -O2 %s -o %t && %env_asan_opts=allow_user_segv_handler=true not %run %t 2>&1 | FileCheck %s
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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struct sigaction original_sigaction_sigbus;
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struct sigaction original_sigaction_sigsegv;
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void User_OnSIGSEGV(int signum, siginfo_t *siginfo, void *context) {
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fprintf(stderr, "User sigaction called\n");
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struct sigaction original_sigaction;
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if (signum == SIGBUS)
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original_sigaction = original_sigaction_sigbus;
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else if (signum == SIGSEGV)
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original_sigaction = original_sigaction_sigsegv;
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else {
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printf("Invalid signum");
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exit(1);
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}
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if (original_sigaction.sa_flags | SA_SIGINFO)
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original_sigaction.sa_sigaction(signum, siginfo, context);
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else
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original_sigaction.sa_handler(signum);
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}
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int DoSEGV() {
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volatile int *x = 0;
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return *x;
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}
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int InstallHandler(int signum, struct sigaction *original_sigaction) {
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struct sigaction user_sigaction;
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user_sigaction.sa_sigaction = User_OnSIGSEGV;
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user_sigaction.sa_flags = SA_SIGINFO;
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if (sigaction(signum, &user_sigaction, original_sigaction)) {
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perror("sigaction");
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return 1;
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}
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return 0;
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}
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int main() {
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// Let's install handlers for both SIGSEGV and SIGBUS, since pre-Yosemite
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// 32-bit Darwin triggers SIGBUS instead.
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if (InstallHandler(SIGSEGV, &original_sigaction_sigsegv)) return 1;
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if (InstallHandler(SIGBUS, &original_sigaction_sigbus)) return 1;
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fprintf(stderr, "User sigaction installed\n");
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return DoSEGV();
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}
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// CHECK: User sigaction installed
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// CHECK-NEXT: User sigaction called
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// CHECK-NEXT: ASAN:DEADLYSIGNAL
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// CHECK: AddressSanitizer: SEGV on unknown address
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