blob: cfa8ea63426eea2417f385ba4c214ea11a64481f [file] [log] [blame] [edit]
/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "runtime.h"
#include <signal.h>
#include <iostream>
#include "base/memory_tool.h"
#include "runtime_common.h"
namespace art {
void HandleUnexpectedSignalLinux(int signal_number, siginfo_t* info, void* raw_context) {
// Linux is mainly used for host testing. Under those conditions, react to the timeout signal,
// and dump to stderr to avoid missing output on double-faults.
HandleUnexpectedSignalCommon(signal_number,
info,
raw_context,
/* handle_timeout_signal= */ true,
/* dump_on_stderr= */ true);
if (getenv("debug_db_uid") != nullptr || getenv("art_wait_for_gdb_on_crash") != nullptr) {
pid_t tid = GetTid();
std::string thread_name(GetThreadName(tid));
std::cerr << "********************************************************\n"
<< "* Process " << getpid() << " thread " << tid << " \"" << thread_name
<< "\""
<< " has been suspended while crashing.\n"
<< "* Attach gdb:\n"
<< "* gdb -p " << tid << "\n"
<< "********************************************************"
<< std::endl;
// Wait for debugger to attach.
while (true) {
}
}
#ifdef __linux__
// Remove our signal handler for this signal...
struct sigaction action;
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
action.sa_handler = SIG_DFL;
sigaction(signal_number, &action, nullptr);
// ...and re-raise so we die with the appropriate status.
kill(getpid(), signal_number);
#else
exit(EXIT_FAILURE);
#endif
}
void Runtime::InitPlatformSignalHandlers() {
constexpr bool kIsASAN =
#ifdef ADDRESS_SANITIZER
true;
#else
false;
#endif
if (!kIsTargetBuild && kIsASAN) {
// (Temporarily) try and let ASAN print abort stacks, as our code sometimes fails. b/31098551
return;
}
// On the host, we don't have debuggerd to dump a stack for us when something unexpected happens.
InitPlatformSignalHandlersCommon(HandleUnexpectedSignalLinux,
nullptr,
/* handle_timeout_signal= */ true);
}
} // namespace art