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// Regression test for
// https://code.google.com/p/address-sanitizer/issues/detail?id=180
// Fails with debug checks: https://bugs.llvm.org/show_bug.cgi?id=46860
// XFAIL: !compiler-rt-optimized && tsan
// RUN: %clangxx -O0 %s -o %t
// RUN: %env_tool_opts=handle_segv=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
// RUN: %env_tool_opts=handle_segv=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
// RUN: %env_tool_opts=handle_segv=2 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
// RUN: %env_tool_opts=handle_segv=0:allow_user_segv_handler=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
// RUN: %env_tool_opts=handle_segv=1:allow_user_segv_handler=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
// RUN: %env_tool_opts=handle_segv=2:allow_user_segv_handler=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
// RUN: %env_tool_opts=handle_segv=0:allow_user_segv_handler=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
// RUN: %env_tool_opts=handle_segv=1:allow_user_segv_handler=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
// RUN: %env_tool_opts=handle_segv=2:allow_user_segv_handler=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
// Flaky errors in debuggerd with "waitpid returned unexpected pid (0)" in logcat.
// UNSUPPORTED: android && i386-target-arch
#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) {
if (original_sigaction.sa_sigaction)
original_sigaction.sa_sigaction(signum, siginfo, context);
} else {
if (original_sigaction.sa_handler)
original_sigaction.sa_handler(signum);
}
exit(1);
}
int DoSEGV() {
volatile int *x = 0;
return *x;
}
bool 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 false;
}
return true;
}
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) &&
InstallHandler(SIGBUS, &original_sigaction_sigbus)) {
fprintf(stderr, "User sigaction installed\n");
}
return DoSEGV();
}
// CHECK0-NOT: Sanitizer:DEADLYSIGNAL
// CHECK0-NOT: Sanitizer: SEGV on unknown address
// CHECK0: User sigaction installed
// CHECK0-NEXT: User sigaction called
// CHECK1: User sigaction installed
// CHECK1-NEXT: User sigaction called
// CHECK1-NEXT: Sanitizer:DEADLYSIGNAL
// CHECK1: Sanitizer: SEGV on unknown address
// CHECK2-NOT: User sigaction called
// CHECK2: User sigaction installed
// CHECK2-NEXT: Sanitizer:DEADLYSIGNAL
// CHECK2: Sanitizer: SEGV on unknown address
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