1 /* Copyright (C) 2018 The Android Open Source Project 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This file implements interfaces from the file jvmti.h. This implementation 5 * is licensed under the same terms as the file jvmti.h. The 6 * copyright and license information for the file jvmti.h follows. 7 * 8 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. 9 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 10 * 11 * This code is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License version 2 only, as 13 * published by the Free Software Foundation. Oracle designates this 14 * particular file as subject to the "Classpath" exception as provided 15 * by Oracle in the LICENSE file that accompanied this code. 16 * 17 * This code is distributed in the hope that it will be useful, but WITHOUT 18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 20 * version 2 for more details (a copy is included in the LICENSE file that 21 * accompanied this code). 22 * 23 * You should have received a copy of the GNU General Public License version 24 * 2 along with this work; if not, write to the Free Software Foundation, 25 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 26 * 27 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 28 * or visit www.oracle.com if you need additional information or have any 29 * questions. 30 */ 31 32 #ifndef ART_OPENJDKJVMTI_TI_LOGGING_H_ 33 #define ART_OPENJDKJVMTI_TI_LOGGING_H_ 34 35 #include "art_jvmti.h" 36 37 #include <ostream> 38 #include <sstream> 39 40 #include <android-base/logging.h> 41 #include <android-base/macros.h> 42 43 #include "base/mutex.h" 44 #include "thread-current-inl.h" 45 46 namespace openjdkjvmti { 47 48 // NB Uses implementation details of android-base/logging.h. 49 #define JVMTI_LOG(severity, env) \ 50 ::openjdkjvmti::JvmtiLogMessage((env), \ 51 __FILE__, \ 52 __LINE__, \ 53 SEVERITY_LAMBDA(severity), \ 54 _LOG_TAG_INTERNAL, \ 55 -1) 56 57 class JvmtiLogMessage { 58 public: JvmtiLogMessage(jvmtiEnv * env,const char * file,unsigned int line,android::base::LogSeverity severity,const char * tag,int error)59 JvmtiLogMessage(jvmtiEnv* env, 60 const char* file, 61 unsigned int line, 62 android::base::LogSeverity severity, 63 const char* tag, 64 int error) 65 : env_(ArtJvmTiEnv::AsArtJvmTiEnv(env)), 66 real_log_(file, line, severity, tag, error), 67 real_log_stream_(real_log_.stream()) { 68 DCHECK(env_ != nullptr); 69 } 70 ~JvmtiLogMessage()71 ~JvmtiLogMessage() { 72 art::MutexLock mu(art::Thread::Current(), env_->last_error_mutex_); 73 env_->last_error_ = save_stream_.str(); 74 } 75 76 template<typename T> 77 JvmtiLogMessage& operator<<(T t) { 78 (real_log_stream_ << t); 79 (save_stream_ << t); 80 return *this; 81 } 82 83 private: 84 ArtJvmTiEnv* env_; 85 android::base::LogMessage real_log_; 86 // Lifetime of real_log_stream_ is lifetime of real_log_. 87 std::ostream& real_log_stream_; 88 std::ostringstream save_stream_; 89 90 DISALLOW_COPY_AND_ASSIGN(JvmtiLogMessage); 91 }; 92 93 class LogUtil { 94 public: 95 static jvmtiError ClearLastError(jvmtiEnv* env); 96 static jvmtiError GetLastError(jvmtiEnv* env, char** data); 97 98 static jvmtiError SetVerboseFlag(jvmtiEnv* env, jvmtiVerboseFlag flag, jboolean value); 99 static jvmtiError SetVerboseFlagExt(jvmtiEnv* env, const char* data, jboolean enable); 100 }; 101 102 } // namespace openjdkjvmti 103 104 #endif // ART_OPENJDKJVMTI_TI_LOGGING_H_ 105