| /* |
| * Copyright (C) 2012 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. |
| */ |
| |
| #define LOG_TAG "DEBUG" |
| |
| #include "libdebuggerd/backtrace.h" |
| |
| #include <errno.h> |
| #include <dirent.h> |
| #include <limits.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/ptrace.h> |
| #include <sys/types.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <map> |
| #include <memory> |
| #include <string> |
| |
| #include <android-base/unique_fd.h> |
| #include <log/log.h> |
| #include <unwindstack/Unwinder.h> |
| |
| #include "libdebuggerd/types.h" |
| #include "libdebuggerd/utility.h" |
| |
| static void dump_process_header(log_t* log, pid_t pid, const char* process_name) { |
| time_t t = time(NULL); |
| struct tm tm; |
| localtime_r(&t, &tm); |
| char timestr[64]; |
| strftime(timestr, sizeof(timestr), "%F %T", &tm); |
| _LOG(log, logtype::BACKTRACE, "\n\n----- pid %d at %s -----\n", pid, timestr); |
| |
| if (process_name) { |
| _LOG(log, logtype::BACKTRACE, "Cmd line: %s\n", process_name); |
| } |
| _LOG(log, logtype::BACKTRACE, "ABI: '%s'\n", ABI_STRING); |
| } |
| |
| static void dump_process_footer(log_t* log, pid_t pid) { |
| _LOG(log, logtype::BACKTRACE, "\n----- end %d -----\n", pid); |
| } |
| |
| void dump_backtrace_thread(int output_fd, unwindstack::Unwinder* unwinder, |
| const ThreadInfo& thread) { |
| log_t log; |
| log.tfd = output_fd; |
| log.amfd_data = nullptr; |
| |
| _LOG(&log, logtype::BACKTRACE, "\n\"%s\" sysTid=%d\n", thread.thread_name.c_str(), thread.tid); |
| |
| unwinder->SetRegs(thread.registers.get()); |
| unwinder->Unwind(); |
| if (unwinder->NumFrames() == 0) { |
| _LOG(&log, logtype::THREAD, "Unwind failed: tid = %d", thread.tid); |
| return; |
| } |
| |
| log_backtrace(&log, unwinder, " "); |
| } |
| |
| void dump_backtrace(android::base::unique_fd output_fd, unwindstack::Unwinder* unwinder, |
| const std::map<pid_t, ThreadInfo>& thread_info, pid_t target_thread) { |
| log_t log; |
| log.tfd = output_fd.get(); |
| log.amfd_data = nullptr; |
| |
| auto target = thread_info.find(target_thread); |
| if (target == thread_info.end()) { |
| ALOGE("failed to find target thread in thread info"); |
| return; |
| } |
| |
| dump_process_header(&log, target->second.pid, target->second.process_name.c_str()); |
| |
| dump_backtrace_thread(output_fd.get(), unwinder, target->second); |
| for (const auto& [tid, info] : thread_info) { |
| if (tid != target_thread) { |
| dump_backtrace_thread(output_fd.get(), unwinder, info); |
| } |
| } |
| |
| dump_process_footer(&log, target->second.pid); |
| } |
| |
| void dump_backtrace_header(int output_fd) { |
| log_t log; |
| log.tfd = output_fd; |
| log.amfd_data = nullptr; |
| |
| char process_name[128]; |
| read_with_default("/proc/self/cmdline", process_name, sizeof(process_name), "<unknown>"); |
| dump_process_header(&log, getpid(), process_name); |
| } |
| |
| void dump_backtrace_footer(int output_fd) { |
| log_t log; |
| log.tfd = output_fd; |
| log.amfd_data = nullptr; |
| |
| dump_process_footer(&log, getpid()); |
| } |