111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
/*
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* Copyright (C) 2018 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 <android-base/file.h>
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#include <android-base/logging.h>
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#include "AtraceDevice.h"
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namespace android {
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namespace hardware {
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namespace atrace {
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namespace V1_0 {
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namespace implementation {
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using ::android::hardware::atrace::V1_0::Status;
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using ::android::hardware::atrace::V1_0::TracingCategory;
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struct TracingConfig {
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std::string description;
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// path and if error on failure
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std::vector<std::pair<std::string, bool>> paths;
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};
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// This is a map stores categories and their sysfs paths with required flags
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const std::map<std::string, TracingConfig> kTracingMap = {
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// gfx
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{
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"gfx",
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{"Graphics",
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{{"/sys/kernel/debug/tracing/events/mdss/enable", false},
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{"/sys/kernel/debug/tracing/events/sde/enable", false},
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{"/sys/kernel/debug/tracing/events/mali_systrace/enable", false}}},
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},
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{
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"ion",
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{"ION allocation",
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{{"/sys/kernel/debug/tracing/events/kmem/ion_alloc_buffer_start/enable", false}}},
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},
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};
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// Methods from ::android::hardware::atrace::V1_0::IAtraceDevice follow.
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Return<void> AtraceDevice::listCategories(listCategories_cb _hidl_cb) {
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hidl_vec<TracingCategory> categories;
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categories.resize(kTracingMap.size());
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std::size_t i = 0;
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for (auto& c : kTracingMap) {
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categories[i].name = c.first;
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categories[i].description = c.second.description;
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i++;
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}
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_hidl_cb(categories);
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return Void();
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}
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Return<::android::hardware::atrace::V1_0::Status> AtraceDevice::enableCategories(
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const hidl_vec<hidl_string>& categories) {
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if (!categories.size()) {
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return Status::ERROR_INVALID_ARGUMENT;
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}
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for (auto& c : categories) {
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if (kTracingMap.count(c)) {
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for (auto& p : kTracingMap.at(c).paths) {
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if (!android::base::WriteStringToFile("1", p.first)) {
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LOG(ERROR) << "Failed to enable tracing on: " << p.first;
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if (p.second) {
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// disable before return
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disableAllCategories();
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return Status::ERROR_TRACING_POINT;
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}
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}
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}
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} else {
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return Status::ERROR_INVALID_ARGUMENT;
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}
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}
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return Status::SUCCESS;
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}
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Return<::android::hardware::atrace::V1_0::Status> AtraceDevice::disableAllCategories() {
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auto ret = Status::SUCCESS;
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for (auto& c : kTracingMap) {
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for (auto& p : c.second.paths) {
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if (!android::base::WriteStringToFile("0", p.first)) {
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LOG(ERROR) << "Failed to disable tracing on: " << p.first;
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if (p.second) {
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ret = Status::ERROR_TRACING_POINT;
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}
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}
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}
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}
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return ret;
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}
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} // namespace implementation
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} // namespace V1_0
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} // namespace atrace
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} // namespace hardware
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} // namespace android
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