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//===--- InterceptTraps.cpp -----------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include <stdio.h>
#include <signal.h>
#include <string.h>
#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__wasi__)
#include <unistd.h>
#endif
#if defined(_WIN32)
#include <io.h>
#include <process.h>
#include <stdlib.h>
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#endif
#include "swift/Runtime/Config.h"
static void CrashCatcher(int Sig) {
const char *Msg;
switch (Sig) {
case SIGILL: Msg = "CRASHED: SIGILL\n"; break;
case SIGABRT: Msg = "CRASHED: SIGABRT\n"; break;
case SIGFPE: Msg = "CRASHED: SIGFPE\n"; break;
case SIGSEGV: Msg = "CRASHED: SIGSEGV\n"; break;
#if !defined(_WIN32)
case SIGTRAP: Msg = "CRASHED: SIGTRAP\n"; break;
case SIGBUS: Msg = "CRASHED: SIGBUS\n"; break;
case SIGSYS: Msg = "CRASHED: SIGSYS\n"; break;
#endif
default: Msg = "CRASHED: SIG????\n"; break;
}
#if defined(_WIN32)
_write(_fileno(stderr), Msg, strlen(Msg));
#else
write(STDERR_FILENO, Msg, strlen(Msg));
#endif
_exit(0);
}
#if defined(_WIN32)
static LONG WINAPI
VectoredCrashHandler(PEXCEPTION_POINTERS ExceptionInfo) {
switch (ExceptionInfo->ExceptionRecord->ExceptionCode) {
case EXCEPTION_ILLEGAL_INSTRUCTION:
_write(_fileno(stderr), "CRASHED: SIGTRAP\n", 17);
_exit(0);
case EXCEPTION_DATATYPE_MISALIGNMENT:
_write(_fileno(stderr), "CRASHED: SIGBUS\n", 16);
_exit(0);
}
return EXCEPTION_CONTINUE_SEARCH;
}
#endif // _WIN32
SWIFT_CC(swift) SWIFT_RUNTIME_LIBRARY_VISIBILITY extern "C"
void installTrapInterceptor() {
// Disable buffering on stdout so that everything is printed before crashing.
setbuf(stdout, 0);
#if defined(_WIN32)
_set_abort_behavior(0, _WRITE_ABORT_MSG);
#endif
signal(SIGILL, CrashCatcher);
signal(SIGABRT, CrashCatcher);
signal(SIGFPE, CrashCatcher);
signal(SIGSEGV, CrashCatcher);
#if defined(_WIN32)
AddVectoredExceptionHandler(TRUE, VectoredCrashHandler);
#else
signal(SIGTRAP, CrashCatcher);
signal(SIGBUS, CrashCatcher);
signal(SIGSYS, CrashCatcher);
#endif
}
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