1 /* 2 * Copyright (C) 2019 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 "TraceBuffer.h" 18 19 #include <chrono> 20 #include <sstream> 21 #include <unistd.h> 22 #include <vector> 23 24 #include <inttypes.h> 25 26 #include "android-base/utf8.h" 27 28 #include "util/Files.h" 29 30 namespace aapt { 31 namespace tracebuffer { 32 33 namespace { 34 35 constexpr char kBegin = 'B'; 36 constexpr char kEnd = 'E'; 37 38 struct TracePoint { 39 pid_t tid; 40 int64_t time; 41 std::string tag; 42 char type; 43 }; 44 45 std::vector<TracePoint> traces; 46 47 int64_t GetTime() noexcept { 48 auto now = std::chrono::steady_clock::now(); 49 return std::chrono::duration_cast<std::chrono::microseconds>(now.time_since_epoch()).count(); 50 } 51 52 } // namespace anonymous 53 54 void AddWithTime(const std::string& tag, char type, int64_t time) noexcept { 55 TracePoint t = {getpid(), time, tag, type}; 56 traces.emplace_back(t); 57 } 58 59 void Add(const std::string& tag, char type) noexcept { 60 AddWithTime(tag, type, GetTime()); 61 } 62 63 64 65 66 void Flush(const std::string& basePath) { 67 TRACE_CALL(); 68 if (basePath.empty()) { 69 return; 70 } 71 72 std::stringstream s; 73 s << basePath << aapt::file::sDirSep << "report_aapt2_" << getpid() << ".json"; 74 FILE* f = android::base::utf8::fopen(s.str().c_str(), "a"); 75 if (f == nullptr) { 76 return; 77 } 78 79 for(const TracePoint& trace : traces) { 80 fprintf(f, "{\"ts\" : \"%" PRIu64 "\", \"ph\" : \"%c\", \"tid\" : \"%d\" , \"pid\" : \"%d\", " 81 "\"name\" : \"%s\" },\n", trace.time, trace.type, 0, trace.tid, trace.tag.c_str()); 82 } 83 fclose(f); 84 traces.clear(); 85 } 86 87 } // namespace tracebuffer 88 89 void BeginTrace(const std::string& tag) { 90 tracebuffer::Add(tag, tracebuffer::kBegin); 91 } 92 93 void EndTrace() { 94 tracebuffer::Add("", tracebuffer::kEnd); 95 } 96 97 Trace::Trace(const std::string& tag) { 98 tracebuffer::Add(tag, tracebuffer::kBegin); 99 } 100 101 Trace::Trace(const std::string& tag, const std::vector<android::StringPiece>& args) { 102 std::stringstream s; 103 s << tag; 104 s << " "; 105 for (auto& arg : args) { 106 s << arg.to_string(); 107 s << " "; 108 } 109 tracebuffer::Add(s.str(), tracebuffer::kBegin); 110 } 111 112 Trace::~Trace() { 113 tracebuffer::Add("", tracebuffer::kEnd); 114 } 115 116 FlushTrace::FlushTrace(const std::string& basepath, const std::string& tag) 117 : basepath_(basepath) { 118 tracebuffer::Add(tag, tracebuffer::kBegin); 119 } 120 121 FlushTrace::FlushTrace(const std::string& basepath, const std::string& tag, 122 const std::vector<android::StringPiece>& args) : basepath_(basepath) { 123 std::stringstream s; 124 s << tag; 125 s << " "; 126 for (auto& arg : args) { 127 s << arg.to_string(); 128 s << " "; 129 } 130 tracebuffer::Add(s.str(), tracebuffer::kBegin); 131 } 132 133 FlushTrace::FlushTrace(const std::string& basepath, const std::string& tag, 134 const std::vector<std::string>& args) : basepath_(basepath){ 135 std::stringstream s; 136 s << tag; 137 s << " "; 138 for (auto& arg : args) { 139 s << arg; 140 s << " "; 141 } 142 tracebuffer::Add(s.str(), tracebuffer::kBegin); 143 } 144 145 FlushTrace::~FlushTrace() { 146 tracebuffer::Add("", tracebuffer::kEnd); 147 tracebuffer::Flush(basepath_); 148 } 149 150 } // namespace aapt 151 152
