130 lines
3.5 KiB
C
130 lines
3.5 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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#include <stdbool.h>
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#include <fcntl.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/types.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <cutils/debugger.h>
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#include <cutils/sockets.h>
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#define LOG_TAG "DEBUG"
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#include <log/log.h>
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static int send_request(int sock_fd, void* msg_ptr, size_t msg_len) {
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int result = 0;
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if (TEMP_FAILURE_RETRY(write(sock_fd, msg_ptr, msg_len)) != (ssize_t) msg_len) {
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result = -1;
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} else {
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char ack;
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if (TEMP_FAILURE_RETRY(read(sock_fd, &ack, 1)) != 1) {
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result = -1;
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}
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}
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return result;
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}
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static int make_dump_request(debugger_action_t action, pid_t tid, int timeout_secs) {
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debugger_msg_t msg;
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memset(&msg, 0, sizeof(msg));
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msg.tid = tid;
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msg.action = action;
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int sock_fd = socket_local_client(DEBUGGER_SOCKET_NAME, ANDROID_SOCKET_NAMESPACE_ABSTRACT,
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SOCK_STREAM | SOCK_CLOEXEC);
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if (sock_fd < 0) {
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return -1;
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}
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if (timeout_secs > 0) {
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struct timeval tm;
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tm.tv_sec = timeout_secs;
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tm.tv_usec = 0;
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if (setsockopt(sock_fd, SOL_SOCKET, SO_RCVTIMEO, &tm, sizeof(tm)) == -1) {
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ALOGE("WARNING: Cannot set receive timeout value on socket: %s", strerror(errno));
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}
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if (setsockopt(sock_fd, SOL_SOCKET, SO_SNDTIMEO, &tm, sizeof(tm)) == -1) {
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ALOGE("WARNING: Cannot set send timeout value on socket: %s", strerror(errno));
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}
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}
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if (send_request(sock_fd, &msg, sizeof(msg)) < 0) {
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close(sock_fd);
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return -1;
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}
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return sock_fd;
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}
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int dump_backtrace_to_file(pid_t tid, int fd) {
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return dump_backtrace_to_file_timeout(tid, fd, 0);
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}
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int dump_backtrace_to_file_timeout(pid_t tid, int fd, int timeout_secs) {
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int sock_fd = make_dump_request(DEBUGGER_ACTION_DUMP_BACKTRACE, tid, timeout_secs);
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if (sock_fd < 0) {
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return -1;
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}
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/* Write the data read from the socket to the fd. */
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int result = 0;
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char buffer[1024];
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ssize_t n;
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while ((n = TEMP_FAILURE_RETRY(read(sock_fd, buffer, sizeof(buffer)))) > 0) {
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if (TEMP_FAILURE_RETRY(write(fd, buffer, n)) != n) {
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result = -1;
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break;
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}
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}
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close(sock_fd);
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return result;
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}
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int dump_tombstone(pid_t tid, char* pathbuf, size_t pathlen) {
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return dump_tombstone_timeout(tid, pathbuf, pathlen, 0);
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}
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int dump_tombstone_timeout(pid_t tid, char* pathbuf, size_t pathlen, int timeout_secs) {
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int sock_fd = make_dump_request(DEBUGGER_ACTION_DUMP_TOMBSTONE, tid, timeout_secs);
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if (sock_fd < 0) {
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return -1;
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}
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/* Read the tombstone file name. */
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char buffer[100]; /* This is larger than the largest tombstone path. */
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int result = 0;
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ssize_t n = TEMP_FAILURE_RETRY(read(sock_fd, buffer, sizeof(buffer) - 1));
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if (n <= 0) {
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result = -1;
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} else {
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if (pathbuf && pathlen) {
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if (n >= (ssize_t) pathlen) {
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n = pathlen - 1;
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}
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buffer[n] = '\0';
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memcpy(pathbuf, buffer, n + 1);
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}
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}
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close(sock_fd);
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return result;
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}
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