| /* |
| * 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 <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 <memory> |
| #include <string> |
| |
| #include <backtrace/Backtrace.h> |
| #include <log/log.h> |
| |
| #include "backtrace.h" |
| |
| #include "utility.h" |
| |
| static void dump_process_header(log_t* log, pid_t pid) { |
| char path[PATH_MAX]; |
| char procnamebuf[1024]; |
| char* procname = NULL; |
| FILE* fp; |
| |
| snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); |
| if ((fp = fopen(path, "r"))) { |
| procname = fgets(procnamebuf, sizeof(procnamebuf), fp); |
| fclose(fp); |
| } |
| |
| 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 (procname) { |
| _LOG(log, logtype::BACKTRACE, "Cmd line: %s\n", procname); |
| } |
| _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); |
| } |
| |
| static void dump_thread(log_t* log, BacktraceMap* map, pid_t pid, pid_t tid) { |
| char path[PATH_MAX]; |
| char threadnamebuf[1024]; |
| char* threadname = NULL; |
| FILE* fp; |
| |
| snprintf(path, sizeof(path), "/proc/%d/comm", tid); |
| if ((fp = fopen(path, "r"))) { |
| threadname = fgets(threadnamebuf, sizeof(threadnamebuf), fp); |
| fclose(fp); |
| if (threadname) { |
| size_t len = strlen(threadname); |
| if (len && threadname[len - 1] == '\n') { |
| threadname[len - 1] = '\0'; |
| } |
| } |
| } |
| |
| _LOG(log, logtype::BACKTRACE, "\n\"%s\" sysTid=%d\n", threadname ? threadname : "<unknown>", tid); |
| |
| std::unique_ptr<Backtrace> backtrace(Backtrace::Create(pid, tid, map)); |
| if (backtrace->Unwind(0)) { |
| dump_backtrace_to_log(backtrace.get(), log, " "); |
| } else { |
| ALOGE("Unwind failed: tid = %d: %s", tid, |
| backtrace->GetErrorString(backtrace->GetError()).c_str()); |
| } |
| } |
| |
| void dump_backtrace(int fd, BacktraceMap* map, pid_t pid, pid_t tid, |
| const std::set<pid_t>& siblings, std::string* amfd_data) { |
| log_t log; |
| log.tfd = fd; |
| log.amfd_data = amfd_data; |
| |
| dump_process_header(&log, pid); |
| dump_thread(&log, map, pid, tid); |
| |
| for (pid_t sibling : siblings) { |
| dump_thread(&log, map, pid, sibling); |
| } |
| |
| dump_process_footer(&log, pid); |
| } |
| |
| void dump_backtrace_to_log(Backtrace* backtrace, log_t* log, const char* prefix) { |
| for (size_t i = 0; i < backtrace->NumFrames(); i++) { |
| _LOG(log, logtype::BACKTRACE, "%s%s\n", prefix, backtrace->FormatFrameData(i).c_str()); |
| } |
| } |