Enable --debug option for "lshal" command.
This calls into live binderized services and logs their "IBase::debug(...)"
output.
Bug: 36520620
Test: make, adb shell lshal, adb shell bugreport
Change-Id: Ida3b0c61eafd9f3de562a5df3af24bbaf383de22
diff --git a/cmds/lshal/PipeRelay.cpp b/cmds/lshal/PipeRelay.cpp
new file mode 100644
index 0000000..c7b29df
--- /dev/null
+++ b/cmds/lshal/PipeRelay.cpp
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#include "PipeRelay.h"
+
+#include <sys/socket.h>
+#include <utils/Thread.h>
+
+namespace android {
+namespace lshal {
+
+struct PipeRelay::RelayThread : public Thread {
+ explicit RelayThread(int fd, std::ostream &os);
+
+ bool threadLoop() override;
+
+private:
+ int mFd;
+ std::ostream &mOutStream;
+
+ DISALLOW_COPY_AND_ASSIGN(RelayThread);
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+PipeRelay::RelayThread::RelayThread(int fd, std::ostream &os)
+ : mFd(fd),
+ mOutStream(os) {
+}
+
+bool PipeRelay::RelayThread::threadLoop() {
+ char buffer[1024];
+ ssize_t n = read(mFd, buffer, sizeof(buffer));
+
+ if (n <= 0) {
+ return false;
+ }
+
+ mOutStream.write(buffer, n);
+
+ return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+PipeRelay::PipeRelay(std::ostream &os)
+ : mOutStream(os),
+ mInitCheck(NO_INIT) {
+ int res = socketpair(AF_UNIX, SOCK_STREAM, 0 /* protocol */, mFds);
+
+ if (res < 0) {
+ mInitCheck = -errno;
+ return;
+ }
+
+ mThread = new RelayThread(mFds[0], os);
+ mInitCheck = mThread->run("RelayThread");
+}
+
+// static
+void PipeRelay::CloseFd(int *fd) {
+ if (*fd >= 0) {
+ close(*fd);
+ *fd = -1;
+ }
+}
+
+PipeRelay::~PipeRelay() {
+ if (mFds[1] >= 0) {
+ shutdown(mFds[1], SHUT_WR);
+ }
+
+ if (mFds[0] >= 0) {
+ shutdown(mFds[0], SHUT_RD);
+ }
+
+ if (mThread != NULL) {
+ mThread->join();
+ mThread.clear();
+ }
+
+ CloseFd(&mFds[1]);
+ CloseFd(&mFds[0]);
+}
+
+status_t PipeRelay::initCheck() const {
+ return mInitCheck;
+}
+
+int PipeRelay::fd() const {
+ return mFds[1];
+}
+
+} // namespace lshal
+} // namespace android