1 /* Copyright (C) 2016 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_STACK_H_ 33 #define ART_OPENJDKJVMTI_TI_STACK_H_ 34 35 #include "jni.h" 36 #include "jvmti.h" 37 38 #include "art_method.h" 39 #include "base/mutex.h" 40 #include "events.h" 41 #include "stack.h" 42 43 namespace openjdkjvmti { 44 45 class StackUtil { 46 public: 47 static jvmtiError GetAllStackTraces(jvmtiEnv* env, 48 jint max_frame_count, 49 jvmtiStackInfo** stack_info_ptr, 50 jint* thread_count_ptr) 51 REQUIRES(!art::Locks::thread_list_lock_); 52 53 static jvmtiError GetFrameCount(jvmtiEnv* env, jthread thread, jint* count_ptr); 54 55 static jvmtiError GetFrameLocation(jvmtiEnv* env, 56 jthread thread, 57 jint depth, 58 jmethodID* method_ptr, 59 jlocation* location_ptr); 60 61 static jvmtiError GetStackTrace(jvmtiEnv* env, 62 jthread thread, 63 jint start_depth, 64 jint max_frame_count, 65 jvmtiFrameInfo* frame_buffer, 66 jint* count_ptr); 67 68 static jvmtiError GetThreadListStackTraces(jvmtiEnv* env, 69 jint thread_count, 70 const jthread* thread_list, 71 jint max_frame_count, 72 jvmtiStackInfo** stack_info_ptr); 73 74 static jvmtiError GetOwnedMonitorStackDepthInfo(jvmtiEnv* env, 75 jthread thread, 76 jint* info_cnt_ptr, 77 jvmtiMonitorStackDepthInfo** info_ptr); 78 79 static jvmtiError GetOwnedMonitorInfo(jvmtiEnv* env, 80 jthread thread, 81 jint* owned_monitor_count_ptr, 82 jobject** owned_monitors_ptr); 83 84 static jvmtiError NotifyFramePop(jvmtiEnv* env, jthread thread, jint depth); 85 86 static jvmtiError PopFrame(jvmtiEnv* env, jthread thread); 87 88 template <typename T> 89 static jvmtiError ForceEarlyReturn( 90 jvmtiEnv* env, EventHandler* event_handler, jthread thread, T value); 91 }; 92 93 struct FindFrameAtDepthVisitor : art::StackVisitor { 94 public: FindFrameAtDepthVisitorFindFrameAtDepthVisitor95 FindFrameAtDepthVisitor(art::Thread* target, art::Context* ctx, jint depth) 96 REQUIRES_SHARED(art::Locks::mutator_lock_) 97 : art::StackVisitor(target, ctx, art::StackVisitor::StackWalkKind::kIncludeInlinedFrames), 98 found_frame_(false), 99 cnt_(0), 100 depth_(static_cast<size_t>(depth)) { } 101 FoundFrameFindFrameAtDepthVisitor102 bool FoundFrame() { 103 return found_frame_; 104 } 105 VisitFrameFindFrameAtDepthVisitor106 bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { 107 if (GetMethod()->IsRuntimeMethod()) { 108 return true; 109 } 110 if (cnt_ == depth_) { 111 // We found our frame, exit. 112 found_frame_ = true; 113 return false; 114 } else { 115 cnt_++; 116 return true; 117 } 118 } 119 120 art::ShadowFrame* GetOrCreateShadowFrame(/*out*/bool* created_frame) 121 REQUIRES_SHARED(art::Locks::mutator_lock_); 122 123 private: 124 bool found_frame_; 125 size_t cnt_; 126 size_t depth_; 127 }; 128 129 } // namespace openjdkjvmti 130 131 #endif // ART_OPENJDKJVMTI_TI_STACK_H_ 132