b05c472421
This simplifies some of the logic and removes the need to pass an Arch value to functions that should already know about the arch it is operating on. Includes fixes for debuggerd/libbacktrace. Added new unit tests to cover new cases. Test: All unit tests pass. Test: Faked unwinder failing to verify debuggerd error messages display Test: properly in backtrace and tombstone. Change-Id: I439fcae0695befcfb1cb4c0a786cc74949d33425
119 lines
3.4 KiB
C++
119 lines
3.4 KiB
C++
/*
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* Copyright (C) 2012 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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#define LOG_TAG "DEBUG"
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#include "libdebuggerd/backtrace.h"
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#include <dirent.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ptrace.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <map>
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#include <memory>
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#include <string>
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#include <android-base/unique_fd.h>
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#include <log/log.h>
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#include <unwindstack/Unwinder.h>
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#include "libdebuggerd/types.h"
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#include "libdebuggerd/utility.h"
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#include "util.h"
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static void dump_process_header(log_t* log, pid_t pid, const char* process_name) {
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_LOG(log, logtype::BACKTRACE, "\n\n----- pid %d at %s -----\n", pid, get_timestamp().c_str());
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if (process_name) {
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_LOG(log, logtype::BACKTRACE, "Cmd line: %s\n", process_name);
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}
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_LOG(log, logtype::BACKTRACE, "ABI: '%s'\n", ABI_STRING);
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}
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static void dump_process_footer(log_t* log, pid_t pid) {
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_LOG(log, logtype::BACKTRACE, "\n----- end %d -----\n", pid);
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}
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void dump_backtrace_thread(int output_fd, unwindstack::Unwinder* unwinder,
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const ThreadInfo& thread) {
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log_t log;
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log.tfd = output_fd;
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log.amfd_data = nullptr;
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_LOG(&log, logtype::BACKTRACE, "\n\"%s\" sysTid=%d\n", thread.thread_name.c_str(), thread.tid);
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unwinder->SetRegs(thread.registers.get());
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unwinder->Unwind();
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if (unwinder->NumFrames() == 0) {
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_LOG(&log, logtype::THREAD, "Unwind failed: tid = %d\n", thread.tid);
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if (unwinder->LastErrorCode() != unwindstack::ERROR_NONE) {
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_LOG(&log, logtype::THREAD, " Error code: %s\n", unwinder->LastErrorCodeString());
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_LOG(&log, logtype::THREAD, " Error address: 0x%" PRIx64 "\n", unwinder->LastErrorAddress());
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}
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return;
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}
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log_backtrace(&log, unwinder, " ");
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}
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void dump_backtrace(android::base::unique_fd output_fd, unwindstack::Unwinder* unwinder,
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const std::map<pid_t, ThreadInfo>& thread_info, pid_t target_thread) {
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log_t log;
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log.tfd = output_fd.get();
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log.amfd_data = nullptr;
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auto target = thread_info.find(target_thread);
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if (target == thread_info.end()) {
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ALOGE("failed to find target thread in thread info");
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return;
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}
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dump_process_header(&log, target->second.pid, target->second.process_name.c_str());
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dump_backtrace_thread(output_fd.get(), unwinder, target->second);
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for (const auto& [tid, info] : thread_info) {
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if (tid != target_thread) {
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dump_backtrace_thread(output_fd.get(), unwinder, info);
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}
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}
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dump_process_footer(&log, target->second.pid);
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}
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void dump_backtrace_header(int output_fd) {
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log_t log;
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log.tfd = output_fd;
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log.amfd_data = nullptr;
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pid_t pid = getpid();
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dump_process_header(&log, pid, get_process_name(pid).c_str());
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}
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void dump_backtrace_footer(int output_fd) {
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log_t log;
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log.tfd = output_fd;
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log.amfd_data = nullptr;
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dump_process_footer(&log, getpid());
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}
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