1e4afb52c5
Bug: none Test: `debuggerd mediaserver` Change-Id: Ibd7bbddb92a99ce49622c0ecc9329a3723f2085d
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
/*
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* Copyright 2016, 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 <err.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 <limits>
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#include <thread>
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#include <android-base/file.h>
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#include <android-base/logging.h>
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#include <android-base/parseint.h>
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#include <android-base/unique_fd.h>
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#include <debuggerd/client.h>
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#include <debuggerd/util.h>
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#include <selinux/selinux.h>
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using android::base::unique_fd;
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static void usage(int exit_code) {
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fprintf(stderr, "usage: debuggerd [-b] PID\n");
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_exit(exit_code);
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}
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static std::thread spawn_redirect_thread(unique_fd fd) {
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return std::thread([fd{ std::move(fd) }]() {
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while (true) {
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char buf[BUFSIZ];
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ssize_t rc = TEMP_FAILURE_RETRY(read(fd.get(), buf, sizeof(buf)));
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if (rc <= 0) {
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return;
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}
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if (!android::base::WriteFully(STDOUT_FILENO, buf, rc)) {
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return;
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}
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}
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});
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}
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int main(int argc, char* argv[]) {
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if (argc <= 1) usage(0);
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if (argc > 3) usage(1);
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if (argc == 3 && strcmp(argv[1], "-b") != 0) usage(1);
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pid_t pid;
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if (!android::base::ParseInt(argv[argc - 1], &pid, 1, std::numeric_limits<pid_t>::max())) {
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usage(1);
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}
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unique_fd piperead, pipewrite;
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if (!Pipe(&piperead, &pipewrite)) {
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err(1, "failed to create pipe");
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}
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std::thread redirect_thread = spawn_redirect_thread(std::move(piperead));
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bool backtrace = argc == 3;
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if (!debuggerd_trigger_dump(pid, std::move(pipewrite),
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backtrace ? kDebuggerdBacktrace : kDebuggerdTombstone, 0)) {
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redirect_thread.join();
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errx(1, "failed to dump process %d", pid);
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}
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redirect_thread.join();
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return 0;
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}
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