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/*
* 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, 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);
}
static void log_thread_name(log_t* log, pid_t tid, const char* thread_name) {
_LOG(log, logtype::BACKTRACE, "\n\"%s\" sysTid=%d\n", thread_name, tid);
}
static void dump_thread(log_t* log, BacktraceMap* map, pid_t pid, pid_t tid,
const std::string& thread_name) {
log_thread_name(log, tid, thread_name.c_str());
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::string& process_name,
const std::map<pid_t, std::string>& threads, std::string* amfd_data) {
log_t log;
log.tfd = fd;
log.amfd_data = amfd_data;
dump_process_header(&log, pid, process_name.c_str());
dump_thread(&log, map, pid, tid, threads.find(tid)->second.c_str());
for (const auto& it : threads) {
pid_t thread_tid = it.first;
const std::string& thread_name = it.second;
if (thread_tid != tid) {
dump_thread(&log, map, pid, thread_tid, thread_name.c_str());
}
}
dump_process_footer(&log, pid);
}
void dump_backtrace_ucontext(int output_fd, ucontext_t* ucontext) {
pid_t pid = getpid();
pid_t tid = gettid();
log_t log;
log.tfd = output_fd;
log.amfd_data = nullptr;
char thread_name[16];
read_with_default("/proc/self/comm", thread_name, sizeof(thread_name), "<unknown>");
log_thread_name(&log, tid, thread_name);
std::unique_ptr<Backtrace> backtrace(Backtrace::Create(pid, tid));
if (backtrace->Unwind(0, ucontext)) {
dump_backtrace_to_log(backtrace.get(), &log, " ");
} else {
ALOGE("Unwind failed: tid = %d: %s", tid,
backtrace->GetErrorString(backtrace->GetError()).c_str());
}
}
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());
}
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());
}
}
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