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