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/*
* Copyright (C) 2013 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 "CameraTraces"
#define ATRACE_TAG ATRACE_TAG_CAMERA
//#define LOG_NDEBUG 0
#include "utils/CameraTraces.h"
#include <utils/ProcessCallStack.h>
#include <utils/Mutex.h>
#include <utils/List.h>
#include <utils/Log.h>
#include <cutils/trace.h>
namespace android {
namespace camera3 {
struct CameraTracesImpl {
Mutex tracesLock;
List<ProcessCallStack> pcsList;
}; // class CameraTraces::Impl;
static CameraTracesImpl gImpl;
CameraTracesImpl& CameraTraces::sImpl = gImpl;
void CameraTraces::saveTrace() {
ALOGV("%s: begin", __FUNCTION__);
ATRACE_BEGIN("CameraTraces::saveTrace");
Mutex::Autolock al(sImpl.tracesLock);
List<ProcessCallStack>& pcsList = sImpl.pcsList;
// Insert new ProcessCallStack, and immediately crawl all the threads
pcsList.push_front(ProcessCallStack());
ProcessCallStack& pcs = *pcsList.begin();
pcs.update();
if (pcsList.size() > MAX_TRACES) {
// Prune list periodically and discard oldest entry
pcsList.erase(--pcsList.end());
}
IF_ALOGV() {
pcs.log(LOG_TAG, ANDROID_LOG_VERBOSE);
}
ALOGD("Process trace saved. Use dumpsys media.camera to view.");
ATRACE_END();
}
status_t CameraTraces::dump(int fd, const Vector<String16> &args __attribute__((unused))) {
ALOGV("%s: fd = %d", __FUNCTION__, fd);
Mutex::Autolock al(sImpl.tracesLock);
List<ProcessCallStack>& pcsList = sImpl.pcsList;
if (fd < 0) {
ALOGW("%s: Negative FD (%d)", __FUNCTION__, fd);
return BAD_VALUE;
}
fdprintf(fd, "Camera traces (%zu):\n", pcsList.size());
if (pcsList.empty()) {
fdprintf(fd, " No camera traces collected.\n");
}
// Print newest items first
List<ProcessCallStack>::iterator it, end;
for (it = pcsList.begin(), end = pcsList.end(); it != end; ++it) {
const ProcessCallStack& pcs = *it;
pcs.dump(fd, DUMP_INDENT);
}
return OK;
}
}; // namespace camera3
}; // namespace android
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