1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <android-base/file.h> 18 #include <android-base/logging.h> 19 20 #include "AtraceDevice.h" 21 22 namespace android { 23 namespace hardware { 24 namespace atrace { 25 namespace V1_0 { 26 namespace implementation { 27 28 using ::android::hardware::atrace::V1_0::Status; 29 using ::android::hardware::atrace::V1_0::TracingCategory; 30 31 struct TracingConfig { 32 std::string description; 33 // path and if error on failure 34 std::vector<std::pair<std::string, bool>> paths; 35 }; 36 37 // This is a map stores categories and their sysfs paths with required flags 38 const std::map<std::string, TracingConfig> kTracingMap = { 39 // gfx 40 { 41 "gfx", 42 {"Graphics", 43 {{"/sys/kernel/debug/tracing/events/mdss/enable", false}, 44 {"/sys/kernel/debug/tracing/events/sde/enable", false}, 45 {"/sys/kernel/debug/tracing/events/mali_systrace/enable", false}}}, 46 }, 47 { 48 "ion", 49 {"ION allocation", 50 {{"/sys/kernel/debug/tracing/events/kmem/ion_alloc_buffer_start/enable", false}}}, 51 }, 52 }; 53 54 // Methods from ::android::hardware::atrace::V1_0::IAtraceDevice follow. 55 Return<void> AtraceDevice::listCategories(listCategories_cb _hidl_cb) { 56 hidl_vec<TracingCategory> categories; 57 categories.resize(kTracingMap.size()); 58 std::size_t i = 0; 59 for (auto& c : kTracingMap) { 60 categories[i].name = c.first; 61 categories[i].description = c.second.description; 62 i++; 63 } 64 _hidl_cb(categories); 65 return Void(); 66 } 67 68 Return<::android::hardware::atrace::V1_0::Status> AtraceDevice::enableCategories( 69 const hidl_vec<hidl_string>& categories) { 70 if (!categories.size()) { 71 return Status::ERROR_INVALID_ARGUMENT; 72 } 73 for (auto& c : categories) { 74 if (kTracingMap.count(c)) { 75 for (auto& p : kTracingMap.at(c).paths) { 76 if (!android::base::WriteStringToFile("1", p.first)) { 77 LOG(ERROR) << "Failed to enable tracing on: " << p.first; 78 if (p.second) { 79 // disable before return 80 disableAllCategories(); 81 return Status::ERROR_TRACING_POINT; 82 } 83 } 84 } 85 } else { 86 return Status::ERROR_INVALID_ARGUMENT; 87 } 88 } 89 return Status::SUCCESS; 90 } 91 92 Return<::android::hardware::atrace::V1_0::Status> AtraceDevice::disableAllCategories() { 93 auto ret = Status::SUCCESS; 94 for (auto& c : kTracingMap) { 95 for (auto& p : c.second.paths) { 96 if (!android::base::WriteStringToFile("0", p.first)) { 97 LOG(ERROR) << "Failed to enable tracing on: " << p.first; 98 if (p.second) { 99 ret = Status::ERROR_TRACING_POINT; 100 } 101 } 102 } 103 } 104 return ret; 105 } 106 107 } // namespace implementation 108 } // namespace V1_0 109 } // namespace atrace 110 } // namespace hardware 111 } // namespace android 112
