forked from OSchip/llvm-project
49 lines
1.4 KiB
C++
49 lines
1.4 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 && ASAN_OPTIONS=allow_user_segv_handler=true not %t 2>&1 | FileCheck %s
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// RUN: %clangxx_asan -O2 %s -o %t && ASAN_OPTIONS=allow_user_segv_handler=true not %t 2>&1 | FileCheck %s
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#include <signal.h>
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#include <stdio.h>
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struct sigaction user_sigaction;
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struct sigaction original_sigaction;
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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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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 main() {
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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 defined(__APPLE__) && !defined(__LP64__)
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// On 32-bit Darwin KERN_PROTECTION_FAILURE (SIGBUS) is delivered.
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int signum = SIGBUS;
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#else
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// On 64-bit Darwin KERN_INVALID_ADDRESS (SIGSEGV) is delivered.
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// On Linux SIGSEGV is delivered as well.
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int signum = SIGSEGV;
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#endif
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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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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:SIGSEGV
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// CHECK: AddressSanitizer: SEGV on unknown address
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