Andreas Gampe | b5eb94a | 2016-10-27 19:23:09 -0700 | [diff] [blame^] | 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 | #include "ti_stack.h" |
| 33 | |
| 34 | #include "art_jvmti.h" |
| 35 | #include "art_method-inl.h" |
| 36 | #include "base/enums.h" |
| 37 | #include "dex_file.h" |
| 38 | #include "dex_file_annotations.h" |
| 39 | #include "jni_env_ext.h" |
| 40 | #include "mirror/class.h" |
| 41 | #include "mirror/dex_cache.h" |
| 42 | #include "scoped_thread_state_change-inl.h" |
| 43 | #include "stack.h" |
| 44 | #include "thread.h" |
| 45 | #include "thread_pool.h" |
| 46 | |
| 47 | namespace openjdkjvmti { |
| 48 | |
| 49 | struct GetStackTraceVisitor : public art::StackVisitor { |
| 50 | GetStackTraceVisitor(art::Thread* thread_in, |
| 51 | art::ScopedObjectAccessAlreadyRunnable& soa_, |
| 52 | size_t start_, |
| 53 | size_t stop_) |
| 54 | : StackVisitor(thread_in, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| 55 | soa(soa_), |
| 56 | start(start_), |
| 57 | stop(stop_) {} |
| 58 | |
| 59 | bool VisitFrame() REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| 60 | art::ArtMethod* m = GetMethod(); |
| 61 | if (m->IsRuntimeMethod()) { |
| 62 | return true; |
| 63 | } |
| 64 | |
| 65 | if (start == 0) { |
| 66 | m = m->GetInterfaceMethodIfProxy(art::kRuntimePointerSize); |
| 67 | jmethodID id = soa.EncodeMethod(m); |
| 68 | |
| 69 | art::mirror::DexCache* dex_cache = m->GetDexCache(); |
| 70 | int32_t line_number = -1; |
| 71 | if (dex_cache != nullptr) { // be tolerant of bad input |
| 72 | const art::DexFile* dex_file = dex_cache->GetDexFile(); |
| 73 | line_number = art::annotations::GetLineNumFromPC(dex_file, m, GetDexPc(false)); |
| 74 | } |
| 75 | |
| 76 | jvmtiFrameInfo info = { id, static_cast<jlong>(line_number) }; |
| 77 | frames.push_back(info); |
| 78 | |
| 79 | if (stop == 1) { |
| 80 | return false; // We're done. |
| 81 | } else if (stop > 0) { |
| 82 | stop--; |
| 83 | } |
| 84 | } else { |
| 85 | start--; |
| 86 | } |
| 87 | |
| 88 | return true; |
| 89 | } |
| 90 | |
| 91 | art::ScopedObjectAccessAlreadyRunnable& soa; |
| 92 | std::vector<jvmtiFrameInfo> frames; |
| 93 | size_t start; |
| 94 | size_t stop; |
| 95 | }; |
| 96 | |
| 97 | struct GetStackTraceClosure : public art::Closure { |
| 98 | public: |
| 99 | GetStackTraceClosure(size_t start, size_t stop) |
| 100 | : start_input(start), |
| 101 | stop_input(stop), |
| 102 | start_result(0), |
| 103 | stop_result(0) {} |
| 104 | |
| 105 | void Run(art::Thread* self) OVERRIDE { |
| 106 | art::ScopedObjectAccess soa(art::Thread::Current()); |
| 107 | |
| 108 | GetStackTraceVisitor visitor(self, soa, start_input, stop_input); |
| 109 | visitor.WalkStack(false); |
| 110 | |
| 111 | frames.swap(visitor.frames); |
| 112 | start_result = visitor.start; |
| 113 | stop_result = visitor.stop; |
| 114 | } |
| 115 | |
| 116 | const size_t start_input; |
| 117 | const size_t stop_input; |
| 118 | |
| 119 | std::vector<jvmtiFrameInfo> frames; |
| 120 | size_t start_result; |
| 121 | size_t stop_result; |
| 122 | }; |
| 123 | |
| 124 | jvmtiError StackUtil::GetStackTrace(jvmtiEnv* jvmti_env ATTRIBUTE_UNUSED, |
| 125 | jthread java_thread, |
| 126 | jint start_depth, |
| 127 | jint max_frame_count, |
| 128 | jvmtiFrameInfo* frame_buffer, |
| 129 | jint* count_ptr) { |
| 130 | if (java_thread == nullptr) { |
| 131 | return ERR(INVALID_THREAD); |
| 132 | } |
| 133 | |
| 134 | art::Thread* thread; |
| 135 | { |
| 136 | // TODO: Need non-aborting call here, to return JVMTI_ERROR_INVALID_THREAD. |
| 137 | art::ScopedObjectAccess soa(art::Thread::Current()); |
| 138 | art::MutexLock mu(soa.Self(), *art::Locks::thread_list_lock_); |
| 139 | thread = art::Thread::FromManagedThread(soa, java_thread); |
| 140 | DCHECK(thread != nullptr); |
| 141 | } |
| 142 | |
| 143 | art::ThreadState state = thread->GetState(); |
| 144 | if (state == art::ThreadState::kStarting || |
| 145 | state == art::ThreadState::kTerminated || |
| 146 | thread->IsStillStarting()) { |
| 147 | return ERR(THREAD_NOT_ALIVE); |
| 148 | } |
| 149 | |
| 150 | if (max_frame_count < 0) { |
| 151 | return ERR(ILLEGAL_ARGUMENT); |
| 152 | } |
| 153 | if (frame_buffer == nullptr || count_ptr == nullptr) { |
| 154 | return ERR(NULL_POINTER); |
| 155 | } |
| 156 | |
| 157 | if (max_frame_count == 0) { |
| 158 | *count_ptr = 0; |
| 159 | return ERR(NONE); |
| 160 | } |
| 161 | |
| 162 | GetStackTraceClosure closure(start_depth >= 0 ? static_cast<size_t>(start_depth) : 0, |
| 163 | start_depth >= 0 ?static_cast<size_t>(max_frame_count) : 0); |
| 164 | thread->RequestSynchronousCheckpoint(&closure); |
| 165 | |
| 166 | size_t collected_frames = closure.frames.size(); |
| 167 | |
| 168 | // Frames from the top. |
| 169 | if (start_depth >= 0) { |
| 170 | if (closure.start_result != 0) { |
| 171 | // Not enough frames. |
| 172 | return ERR(ILLEGAL_ARGUMENT); |
| 173 | } |
| 174 | DCHECK_LE(collected_frames, static_cast<size_t>(max_frame_count)); |
| 175 | if (closure.frames.size() > 0) { |
| 176 | memcpy(frame_buffer, closure.frames.data(), collected_frames * sizeof(jvmtiFrameInfo)); |
| 177 | } |
| 178 | *count_ptr = static_cast<jint>(closure.frames.size()); |
| 179 | return ERR(NONE); |
| 180 | } |
| 181 | |
| 182 | // Frames from the bottom. |
| 183 | if (collected_frames < static_cast<size_t>(-start_depth)) { |
| 184 | return ERR(ILLEGAL_ARGUMENT); |
| 185 | } |
| 186 | |
| 187 | size_t count = std::min(static_cast<size_t>(-start_depth), static_cast<size_t>(max_frame_count)); |
| 188 | memcpy(frame_buffer, |
| 189 | &closure.frames.data()[collected_frames + start_depth], |
| 190 | count * sizeof(jvmtiFrameInfo)); |
| 191 | *count_ptr = static_cast<jint>(count); |
| 192 | return ERR(NONE); |
| 193 | } |
| 194 | |
| 195 | } // namespace openjdkjvmti |