Elliott Hughes | 2faa5f1 | 2012-01-30 14:42:07 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 | */ |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 16 | |
| 17 | #include "trace.h" |
| 18 | |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 19 | #include <sys/uio.h> |
John Reck | 0624a27 | 2015-03-26 15:47:54 -0700 | [diff] [blame] | 20 | #include <unistd.h> |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 21 | |
Andreas Gampe | 46ee31b | 2016-12-14 10:11:49 -0800 | [diff] [blame] | 22 | #include "android-base/stringprintf.h" |
| 23 | |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 24 | #include "art_method-inl.h" |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 25 | #include "base/casts.h" |
Andreas Gampe | 542451c | 2016-07-26 09:02:02 -0700 | [diff] [blame] | 26 | #include "base/enums.h" |
David Sehr | c431b9d | 2018-03-02 12:01:51 -0800 | [diff] [blame] | 27 | #include "base/os.h" |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 28 | #include "base/stl_util.h" |
Mathieu Chartier | 32ce2ad | 2016-03-04 14:58:03 -0800 | [diff] [blame] | 29 | #include "base/systrace.h" |
Vladimir Marko | 80afd02 | 2015-05-19 18:08:00 +0100 | [diff] [blame] | 30 | #include "base/time_utils.h" |
Elliott Hughes | 7616005 | 2012-12-12 16:31:20 -0800 | [diff] [blame] | 31 | #include "base/unix_file/fd_file.h" |
David Sehr | c431b9d | 2018-03-02 12:01:51 -0800 | [diff] [blame] | 32 | #include "base/utils.h" |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 33 | #include "class_linker.h" |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 34 | #include "common_throws.h" |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 35 | #include "debugger.h" |
David Sehr | b2ec9f5 | 2018-02-21 13:20:31 -0800 | [diff] [blame] | 36 | #include "dex/descriptors_names.h" |
David Sehr | 9e734c7 | 2018-01-04 17:56:19 -0800 | [diff] [blame] | 37 | #include "dex/dex_file-inl.h" |
Steven Moreland | e431e27 | 2017-07-18 16:53:49 -0700 | [diff] [blame] | 38 | #include "entrypoints/quick/quick_entrypoints.h" |
Mathieu Chartier | aa51682 | 2015-10-02 15:53:37 -0700 | [diff] [blame] | 39 | #include "gc/scoped_gc_critical_section.h" |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 40 | #include "instrumentation.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 41 | #include "mirror/class-inl.h" |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 42 | #include "mirror/dex_cache-inl.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 43 | #include "mirror/object-inl.h" |
Steven Moreland | e431e27 | 2017-07-18 16:53:49 -0700 | [diff] [blame] | 44 | #include "mirror/object_array-inl.h" |
Andreas Gampe | 373a9b5 | 2017-10-18 09:01:57 -0700 | [diff] [blame] | 45 | #include "nativehelper/scoped_local_ref.h" |
Mathieu Chartier | 0795f23 | 2016-09-27 18:43:30 -0700 | [diff] [blame] | 46 | #include "scoped_thread_state_change-inl.h" |
Andreas Gampe | 513061a | 2017-06-01 09:17:34 -0700 | [diff] [blame] | 47 | #include "stack.h" |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 48 | #include "thread.h" |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 49 | #include "thread_list.h" |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 50 | |
| 51 | namespace art { |
| 52 | |
Andreas Gampe | 46ee31b | 2016-12-14 10:11:49 -0800 | [diff] [blame] | 53 | using android::base::StringPrintf; |
| 54 | |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 55 | static constexpr size_t TraceActionBits = MinimumBitsToStore( |
| 56 | static_cast<size_t>(kTraceMethodActionMask)); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 57 | static constexpr uint8_t kOpNewMethod = 1U; |
| 58 | static constexpr uint8_t kOpNewThread = 2U; |
Shukang Zhou | 8a5ab91 | 2017-01-20 11:40:16 -0800 | [diff] [blame] | 59 | static constexpr uint8_t kOpTraceSummary = 3U; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 60 | |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 61 | static const char kTraceTokenChar = '*'; |
| 62 | static const uint16_t kTraceHeaderLength = 32; |
| 63 | static const uint32_t kTraceMagicValue = 0x574f4c53; |
| 64 | static const uint16_t kTraceVersionSingleClock = 2; |
| 65 | static const uint16_t kTraceVersionDualClock = 3; |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 66 | static const uint16_t kTraceRecordSizeSingleClock = 10; // using v2 |
| 67 | static const uint16_t kTraceRecordSizeDualClock = 14; // using v3 with two timestamps |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 68 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 69 | TraceClockSource Trace::default_clock_source_ = kDefaultTraceClockSource; |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 70 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 71 | Trace* volatile Trace::the_trace_ = nullptr; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 72 | pthread_t Trace::sampling_pthread_ = 0U; |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 73 | std::unique_ptr<std::vector<ArtMethod*>> Trace::temp_stack_trace_; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 74 | |
Sebastien Hertz | 0462c4c | 2015-04-01 16:34:17 +0200 | [diff] [blame] | 75 | // The key identifying the tracer to update instrumentation. |
| 76 | static constexpr const char* kTracerInstrumentationKey = "Tracer"; |
| 77 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 78 | static TraceAction DecodeTraceAction(uint32_t tmid) { |
| 79 | return static_cast<TraceAction>(tmid & kTraceMethodActionMask); |
| 80 | } |
| 81 | |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 82 | ArtMethod* Trace::DecodeTraceMethod(uint32_t tmid) { |
| 83 | MutexLock mu(Thread::Current(), *unique_methods_lock_); |
| 84 | return unique_methods_[tmid >> TraceActionBits]; |
| 85 | } |
| 86 | |
| 87 | uint32_t Trace::EncodeTraceMethod(ArtMethod* method) { |
| 88 | MutexLock mu(Thread::Current(), *unique_methods_lock_); |
| 89 | uint32_t idx; |
| 90 | auto it = art_method_id_map_.find(method); |
| 91 | if (it != art_method_id_map_.end()) { |
| 92 | idx = it->second; |
| 93 | } else { |
| 94 | unique_methods_.push_back(method); |
| 95 | idx = unique_methods_.size() - 1; |
| 96 | art_method_id_map_.emplace(method, idx); |
| 97 | } |
| 98 | DCHECK_LT(idx, unique_methods_.size()); |
| 99 | DCHECK_EQ(unique_methods_[idx], method); |
| 100 | return idx; |
| 101 | } |
| 102 | |
| 103 | uint32_t Trace::EncodeTraceMethodAndAction(ArtMethod* method, TraceAction action) { |
| 104 | uint32_t tmid = (EncodeTraceMethod(method) << TraceActionBits) | action; |
| 105 | DCHECK_EQ(method, DecodeTraceMethod(tmid)); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 106 | return tmid; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 107 | } |
| 108 | |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 109 | std::vector<ArtMethod*>* Trace::AllocStackTrace() { |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 110 | return (temp_stack_trace_.get() != nullptr) ? temp_stack_trace_.release() : |
| 111 | new std::vector<ArtMethod*>(); |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 112 | } |
| 113 | |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 114 | void Trace::FreeStackTrace(std::vector<ArtMethod*>* stack_trace) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 115 | stack_trace->clear(); |
| 116 | temp_stack_trace_.reset(stack_trace); |
| 117 | } |
| 118 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 119 | void Trace::SetDefaultClockSource(TraceClockSource clock_source) { |
Elliott Hughes | 0a18df8 | 2015-01-09 15:16:16 -0800 | [diff] [blame] | 120 | #if defined(__linux__) |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 121 | default_clock_source_ = clock_source; |
| 122 | #else |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 123 | if (clock_source != TraceClockSource::kWall) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 124 | LOG(WARNING) << "Ignoring tracing request to use CPU time."; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 125 | } |
| 126 | #endif |
| 127 | } |
| 128 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 129 | static uint16_t GetTraceVersion(TraceClockSource clock_source) { |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 130 | return (clock_source == TraceClockSource::kDual) ? kTraceVersionDualClock |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 131 | : kTraceVersionSingleClock; |
| 132 | } |
| 133 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 134 | static uint16_t GetRecordSize(TraceClockSource clock_source) { |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 135 | return (clock_source == TraceClockSource::kDual) ? kTraceRecordSizeDualClock |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 136 | : kTraceRecordSizeSingleClock; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 137 | } |
| 138 | |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 139 | bool Trace::UseThreadCpuClock() { |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 140 | return (clock_source_ == TraceClockSource::kThreadCpu) || |
| 141 | (clock_source_ == TraceClockSource::kDual); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 142 | } |
| 143 | |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 144 | bool Trace::UseWallClock() { |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 145 | return (clock_source_ == TraceClockSource::kWall) || |
| 146 | (clock_source_ == TraceClockSource::kDual); |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 147 | } |
| 148 | |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 149 | void Trace::MeasureClockOverhead() { |
| 150 | if (UseThreadCpuClock()) { |
Jeff Hao | 57dac6e | 2013-08-15 16:36:24 -0700 | [diff] [blame] | 151 | Thread::Current()->GetCpuMicroTime(); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 152 | } |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 153 | if (UseWallClock()) { |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 154 | MicroTime(); |
| 155 | } |
| 156 | } |
| 157 | |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 158 | // Compute an average time taken to measure clocks. |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 159 | uint32_t Trace::GetClockOverheadNanoSeconds() { |
Jeff Hao | 57dac6e | 2013-08-15 16:36:24 -0700 | [diff] [blame] | 160 | Thread* self = Thread::Current(); |
| 161 | uint64_t start = self->GetCpuMicroTime(); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 162 | |
| 163 | for (int i = 4000; i > 0; i--) { |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 164 | MeasureClockOverhead(); |
| 165 | MeasureClockOverhead(); |
| 166 | MeasureClockOverhead(); |
| 167 | MeasureClockOverhead(); |
| 168 | MeasureClockOverhead(); |
| 169 | MeasureClockOverhead(); |
| 170 | MeasureClockOverhead(); |
| 171 | MeasureClockOverhead(); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 172 | } |
| 173 | |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 174 | uint64_t elapsed_us = self->GetCpuMicroTime() - start; |
| 175 | return static_cast<uint32_t>(elapsed_us / 32); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 176 | } |
| 177 | |
Elliott Hughes | ffb465f | 2012-03-01 18:46:05 -0800 | [diff] [blame] | 178 | // TODO: put this somewhere with the big-endian equivalent used by JDWP. |
| 179 | static void Append2LE(uint8_t* buf, uint16_t val) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 180 | *buf++ = static_cast<uint8_t>(val); |
| 181 | *buf++ = static_cast<uint8_t>(val >> 8); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 182 | } |
| 183 | |
Elliott Hughes | ffb465f | 2012-03-01 18:46:05 -0800 | [diff] [blame] | 184 | // TODO: put this somewhere with the big-endian equivalent used by JDWP. |
| 185 | static void Append4LE(uint8_t* buf, uint32_t val) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 186 | *buf++ = static_cast<uint8_t>(val); |
| 187 | *buf++ = static_cast<uint8_t>(val >> 8); |
| 188 | *buf++ = static_cast<uint8_t>(val >> 16); |
| 189 | *buf++ = static_cast<uint8_t>(val >> 24); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 190 | } |
| 191 | |
Elliott Hughes | ffb465f | 2012-03-01 18:46:05 -0800 | [diff] [blame] | 192 | // TODO: put this somewhere with the big-endian equivalent used by JDWP. |
| 193 | static void Append8LE(uint8_t* buf, uint64_t val) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 194 | *buf++ = static_cast<uint8_t>(val); |
| 195 | *buf++ = static_cast<uint8_t>(val >> 8); |
| 196 | *buf++ = static_cast<uint8_t>(val >> 16); |
| 197 | *buf++ = static_cast<uint8_t>(val >> 24); |
| 198 | *buf++ = static_cast<uint8_t>(val >> 32); |
| 199 | *buf++ = static_cast<uint8_t>(val >> 40); |
| 200 | *buf++ = static_cast<uint8_t>(val >> 48); |
| 201 | *buf++ = static_cast<uint8_t>(val >> 56); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 202 | } |
| 203 | |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 204 | static void GetSample(Thread* thread, void* arg) REQUIRES_SHARED(Locks::mutator_lock_) { |
Andreas Gampe | c7d878d | 2018-11-19 18:42:06 +0000 | [diff] [blame] | 205 | std::vector<ArtMethod*>* const stack_trace = Trace::AllocStackTrace(); |
| 206 | StackVisitor::WalkStack( |
| 207 | [&](const art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) { |
| 208 | ArtMethod* m = stack_visitor->GetMethod(); |
| 209 | // Ignore runtime frames (in particular callee save). |
| 210 | if (!m->IsRuntimeMethod()) { |
| 211 | stack_trace->push_back(m); |
| 212 | } |
| 213 | return true; |
| 214 | }, |
| 215 | thread, |
| 216 | /* context= */ nullptr, |
| 217 | art::StackVisitor::StackWalkKind::kIncludeInlinedFrames); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 218 | Trace* the_trace = reinterpret_cast<Trace*>(arg); |
| 219 | the_trace->CompareAndUpdateStackTrace(thread, stack_trace); |
| 220 | } |
| 221 | |
Andreas Gampe | ca71458 | 2015-04-03 19:41:34 -0700 | [diff] [blame] | 222 | static void ClearThreadStackTraceAndClockBase(Thread* thread, void* arg ATTRIBUTE_UNUSED) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 223 | thread->SetTraceClockBase(0); |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 224 | std::vector<ArtMethod*>* stack_trace = thread->GetStackTraceSample(); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 225 | thread->SetStackTraceSample(nullptr); |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 226 | delete stack_trace; |
| 227 | } |
| 228 | |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 229 | void Trace::CompareAndUpdateStackTrace(Thread* thread, |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 230 | std::vector<ArtMethod*>* stack_trace) { |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 231 | CHECK_EQ(pthread_self(), sampling_pthread_); |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 232 | std::vector<ArtMethod*>* old_stack_trace = thread->GetStackTraceSample(); |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 233 | // Update the thread's stack trace sample. |
| 234 | thread->SetStackTraceSample(stack_trace); |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 235 | // Read timer clocks to use for all events in this trace. |
| 236 | uint32_t thread_clock_diff = 0; |
| 237 | uint32_t wall_clock_diff = 0; |
| 238 | ReadClocks(thread, &thread_clock_diff, &wall_clock_diff); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 239 | if (old_stack_trace == nullptr) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 240 | // If there's no previous stack trace sample for this thread, log an entry event for all |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 241 | // methods in the trace. |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 242 | for (auto rit = stack_trace->rbegin(); rit != stack_trace->rend(); ++rit) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 243 | LogMethodTraceEvent(thread, *rit, instrumentation::Instrumentation::kMethodEntered, |
| 244 | thread_clock_diff, wall_clock_diff); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 245 | } |
| 246 | } else { |
| 247 | // If there's a previous stack trace for this thread, diff the traces and emit entry and exit |
| 248 | // events accordingly. |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 249 | auto old_rit = old_stack_trace->rbegin(); |
| 250 | auto rit = stack_trace->rbegin(); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 251 | // Iterate bottom-up over both traces until there's a difference between them. |
| 252 | while (old_rit != old_stack_trace->rend() && rit != stack_trace->rend() && *old_rit == *rit) { |
| 253 | old_rit++; |
| 254 | rit++; |
| 255 | } |
| 256 | // Iterate top-down over the old trace until the point where they differ, emitting exit events. |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 257 | for (auto old_it = old_stack_trace->begin(); old_it != old_rit.base(); ++old_it) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 258 | LogMethodTraceEvent(thread, *old_it, instrumentation::Instrumentation::kMethodExited, |
| 259 | thread_clock_diff, wall_clock_diff); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 260 | } |
| 261 | // Iterate bottom-up over the new trace from the point where they differ, emitting entry events. |
| 262 | for (; rit != stack_trace->rend(); ++rit) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 263 | LogMethodTraceEvent(thread, *rit, instrumentation::Instrumentation::kMethodEntered, |
| 264 | thread_clock_diff, wall_clock_diff); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 265 | } |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 266 | FreeStackTrace(old_stack_trace); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 267 | } |
| 268 | } |
| 269 | |
| 270 | void* Trace::RunSamplingThread(void* arg) { |
| 271 | Runtime* runtime = Runtime::Current(); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 272 | intptr_t interval_us = reinterpret_cast<intptr_t>(arg); |
Jeff Hao | 4044bda | 2014-01-06 15:50:45 -0800 | [diff] [blame] | 273 | CHECK_GE(interval_us, 0); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 274 | CHECK(runtime->AttachCurrentThread("Sampling Profiler", true, runtime->GetSystemThreadGroup(), |
Mathieu Chartier | e5f13e5 | 2015-02-24 09:37:21 -0800 | [diff] [blame] | 275 | !runtime->IsAotCompiler())); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 276 | |
| 277 | while (true) { |
Jeff Hao | 23009dc | 2013-08-22 15:36:42 -0700 | [diff] [blame] | 278 | usleep(interval_us); |
Mathieu Chartier | 32ce2ad | 2016-03-04 14:58:03 -0800 | [diff] [blame] | 279 | ScopedTrace trace("Profile sampling"); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 280 | Thread* self = Thread::Current(); |
| 281 | Trace* the_trace; |
| 282 | { |
| 283 | MutexLock mu(self, *Locks::trace_lock_); |
| 284 | the_trace = the_trace_; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 285 | if (the_trace == nullptr) { |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 286 | break; |
| 287 | } |
| 288 | } |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 289 | { |
Roland Levillain | e45b3b1 | 2018-02-27 17:18:55 +0000 | [diff] [blame] | 290 | // Avoid a deadlock between a thread doing garbage collection |
| 291 | // and the profile sampling thread, by blocking GC when sampling |
| 292 | // thread stacks (see b/73624630). |
| 293 | gc::ScopedGCCriticalSection gcs(self, |
| 294 | art::gc::kGcCauseInstrumentation, |
| 295 | art::gc::kCollectorTypeInstrumentation); |
Mathieu Chartier | 4f55e22 | 2015-09-04 13:26:21 -0700 | [diff] [blame] | 296 | ScopedSuspendAll ssa(__FUNCTION__); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 297 | MutexLock mu(self, *Locks::thread_list_lock_); |
| 298 | runtime->GetThreadList()->ForEach(GetSample, the_trace); |
| 299 | } |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 300 | } |
| 301 | |
| 302 | runtime->DetachCurrentThread(); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 303 | return nullptr; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 304 | } |
| 305 | |
Andreas Gampe | 6ff3b37 | 2018-03-15 08:53:16 -0700 | [diff] [blame] | 306 | void Trace::Start(const char* trace_filename, |
| 307 | size_t buffer_size, |
| 308 | int flags, |
| 309 | TraceOutputMode output_mode, |
| 310 | TraceMode trace_mode, |
| 311 | int interval_us) { |
| 312 | std::unique_ptr<File> file(OS::CreateEmptyFileWriteOnly(trace_filename)); |
| 313 | if (file == nullptr) { |
| 314 | std::string msg = android::base::StringPrintf("Unable to open trace file '%s'", trace_filename); |
| 315 | PLOG(ERROR) << msg; |
| 316 | ScopedObjectAccess soa(Thread::Current()); |
| 317 | Thread::Current()->ThrowNewException("Ljava/lang/RuntimeException;", msg.c_str()); |
| 318 | return; |
| 319 | } |
| 320 | Start(std::move(file), buffer_size, flags, output_mode, trace_mode, interval_us); |
| 321 | } |
| 322 | |
| 323 | void Trace::Start(int trace_fd, |
| 324 | size_t buffer_size, |
| 325 | int flags, |
| 326 | TraceOutputMode output_mode, |
| 327 | TraceMode trace_mode, |
| 328 | int interval_us) { |
| 329 | if (trace_fd < 0) { |
| 330 | std::string msg = android::base::StringPrintf("Unable to start tracing with invalid fd %d", |
| 331 | trace_fd); |
| 332 | LOG(ERROR) << msg; |
| 333 | ScopedObjectAccess soa(Thread::Current()); |
| 334 | Thread::Current()->ThrowNewException("Ljava/lang/RuntimeException;", msg.c_str()); |
| 335 | return; |
| 336 | } |
| 337 | std::unique_ptr<File> file(new File(trace_fd, "tracefile")); |
| 338 | Start(std::move(file), buffer_size, flags, output_mode, trace_mode, interval_us); |
| 339 | } |
| 340 | |
| 341 | void Trace::StartDDMS(size_t buffer_size, |
| 342 | int flags, |
| 343 | TraceMode trace_mode, |
| 344 | int interval_us) { |
| 345 | Start(std::unique_ptr<File>(), |
| 346 | buffer_size, |
| 347 | flags, |
| 348 | TraceOutputMode::kDDMS, |
| 349 | trace_mode, |
| 350 | interval_us); |
| 351 | } |
| 352 | |
| 353 | void Trace::Start(std::unique_ptr<File>&& trace_file_in, |
| 354 | size_t buffer_size, |
| 355 | int flags, |
| 356 | TraceOutputMode output_mode, |
| 357 | TraceMode trace_mode, |
| 358 | int interval_us) { |
| 359 | // We own trace_file now and are responsible for closing it. To account for error situations, use |
| 360 | // a specialized unique_ptr to ensure we close it on the way out (if it hasn't been passed to a |
| 361 | // Trace instance). |
| 362 | auto deleter = [](File* file) { |
| 363 | if (file != nullptr) { |
| 364 | file->MarkUnchecked(); // Don't deal with flushing requirements. |
| 365 | int result ATTRIBUTE_UNUSED = file->Close(); |
| 366 | delete file; |
| 367 | } |
| 368 | }; |
| 369 | std::unique_ptr<File, decltype(deleter)> trace_file(trace_file_in.release(), deleter); |
Andreas Gampe | 6ff3b37 | 2018-03-15 08:53:16 -0700 | [diff] [blame] | 370 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 371 | Thread* self = Thread::Current(); |
| 372 | { |
| 373 | MutexLock mu(self, *Locks::trace_lock_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 374 | if (the_trace_ != nullptr) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 375 | LOG(ERROR) << "Trace already in progress, ignoring this request"; |
| 376 | return; |
| 377 | } |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 378 | } |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 379 | |
| 380 | // Check interval if sampling is enabled |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 381 | if (trace_mode == TraceMode::kSampling && interval_us <= 0) { |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 382 | LOG(ERROR) << "Invalid sampling interval: " << interval_us; |
| 383 | ScopedObjectAccess soa(self); |
| 384 | ThrowRuntimeException("Invalid sampling interval: %d", interval_us); |
| 385 | return; |
| 386 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 387 | |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 388 | Runtime* runtime = Runtime::Current(); |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 389 | |
| 390 | // Enable count of allocs if specified in the flags. |
| 391 | bool enable_stats = false; |
| 392 | |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 393 | // Create Trace object. |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 394 | { |
Mathieu Chartier | aa51682 | 2015-10-02 15:53:37 -0700 | [diff] [blame] | 395 | // Required since EnableMethodTracing calls ConfigureStubs which visits class linker classes. |
| 396 | gc::ScopedGCCriticalSection gcs(self, |
| 397 | gc::kGcCauseInstrumentation, |
| 398 | gc::kCollectorTypeInstrumentation); |
Mathieu Chartier | 4f55e22 | 2015-09-04 13:26:21 -0700 | [diff] [blame] | 399 | ScopedSuspendAll ssa(__FUNCTION__); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 400 | MutexLock mu(self, *Locks::trace_lock_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 401 | if (the_trace_ != nullptr) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 402 | LOG(ERROR) << "Trace already in progress, ignoring this request"; |
| 403 | } else { |
Stephen Hines | f0b33e5 | 2018-08-25 13:31:52 -0700 | [diff] [blame] | 404 | enable_stats = (flags & kTraceCountAllocs) != 0; |
Andreas Gampe | 6ff3b37 | 2018-03-15 08:53:16 -0700 | [diff] [blame] | 405 | the_trace_ = new Trace(trace_file.release(), buffer_size, flags, output_mode, trace_mode); |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 406 | if (trace_mode == TraceMode::kSampling) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 407 | CHECK_PTHREAD_CALL(pthread_create, (&sampling_pthread_, nullptr, &RunSamplingThread, |
Jeff Hao | 23009dc | 2013-08-22 15:36:42 -0700 | [diff] [blame] | 408 | reinterpret_cast<void*>(interval_us)), |
| 409 | "Sampling profiler thread"); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 410 | the_trace_->interval_us_ = interval_us; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 411 | } else { |
| 412 | runtime->GetInstrumentation()->AddListener(the_trace_, |
| 413 | instrumentation::Instrumentation::kMethodEntered | |
| 414 | instrumentation::Instrumentation::kMethodExited | |
| 415 | instrumentation::Instrumentation::kMethodUnwind); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 416 | // TODO: In full-PIC mode, we don't need to fully deopt. |
Alex Light | 2a90bc9 | 2018-07-10 21:57:42 +0000 | [diff] [blame] | 417 | // TODO: We can only use trampoline entrypoints if we are java-debuggable since in that case |
| 418 | // we know that inlining and other problematic optimizations are disabled. We might just |
| 419 | // want to use the trampolines anyway since it is faster. It makes the story with disabling |
| 420 | // jit-gc more complex though. |
| 421 | runtime->GetInstrumentation()->EnableMethodTracing( |
Andreas Gampe | 98ea9d9 | 2018-10-19 14:06:15 -0700 | [diff] [blame] | 422 | kTracerInstrumentationKey, /*needs_interpreter=*/!runtime->IsJavaDebuggable()); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 423 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 424 | } |
jeffhao | 0791adc | 2012-04-04 11:14:32 -0700 | [diff] [blame] | 425 | } |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 426 | |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 427 | // Can't call this when holding the mutator lock. |
| 428 | if (enable_stats) { |
| 429 | runtime->SetStatsEnabled(true); |
| 430 | } |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 431 | } |
| 432 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 433 | void Trace::StopTracing(bool finish_tracing, bool flush_file) { |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 434 | bool stop_alloc_counting = false; |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 435 | Runtime* const runtime = Runtime::Current(); |
| 436 | Trace* the_trace = nullptr; |
Hiroshi Yamauchi | 9ea02c4 | 2016-03-03 15:09:27 -0800 | [diff] [blame] | 437 | Thread* const self = Thread::Current(); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 438 | pthread_t sampling_pthread = 0U; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 439 | { |
Hiroshi Yamauchi | 9ea02c4 | 2016-03-03 15:09:27 -0800 | [diff] [blame] | 440 | MutexLock mu(self, *Locks::trace_lock_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 441 | if (the_trace_ == nullptr) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 442 | LOG(ERROR) << "Trace stop requested, but no trace currently running"; |
| 443 | } else { |
| 444 | the_trace = the_trace_; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 445 | the_trace_ = nullptr; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 446 | sampling_pthread = sampling_pthread_; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 447 | } |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 448 | } |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 449 | // Make sure that we join before we delete the trace since we don't want to have |
| 450 | // the sampling thread access a stale pointer. This finishes since the sampling thread exits when |
| 451 | // the_trace_ is null. |
| 452 | if (sampling_pthread != 0U) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 453 | CHECK_PTHREAD_CALL(pthread_join, (sampling_pthread, nullptr), "sampling thread shutdown"); |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 454 | sampling_pthread_ = 0U; |
| 455 | } |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 456 | |
Alex Light | 772099a | 2017-11-21 14:05:04 -0800 | [diff] [blame] | 457 | if (the_trace != nullptr) { |
| 458 | stop_alloc_counting = (the_trace->flags_ & Trace::kTraceCountAllocs) != 0; |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 459 | // Stop the trace sources adding more entries to the trace buffer and synchronise stores. |
| 460 | { |
| 461 | gc::ScopedGCCriticalSection gcs(self, |
| 462 | gc::kGcCauseInstrumentation, |
| 463 | gc::kCollectorTypeInstrumentation); |
| 464 | ScopedSuspendAll ssa(__FUNCTION__); |
| 465 | |
| 466 | if (the_trace->trace_mode_ == TraceMode::kSampling) { |
| 467 | MutexLock mu(self, *Locks::thread_list_lock_); |
| 468 | runtime->GetThreadList()->ForEach(ClearThreadStackTraceAndClockBase, nullptr); |
| 469 | } else { |
| 470 | runtime->GetInstrumentation()->DisableMethodTracing(kTracerInstrumentationKey); |
| 471 | runtime->GetInstrumentation()->RemoveListener( |
| 472 | the_trace, instrumentation::Instrumentation::kMethodEntered | |
| 473 | instrumentation::Instrumentation::kMethodExited | |
| 474 | instrumentation::Instrumentation::kMethodUnwind); |
| 475 | } |
| 476 | } |
| 477 | // At this point, code may read buf_ as it's writers are shutdown |
| 478 | // and the ScopedSuspendAll above has ensured all stores to buf_ |
| 479 | // are now visible. |
Alex Light | 772099a | 2017-11-21 14:05:04 -0800 | [diff] [blame] | 480 | if (finish_tracing) { |
| 481 | the_trace->FinishTracing(); |
| 482 | } |
Alex Light | 772099a | 2017-11-21 14:05:04 -0800 | [diff] [blame] | 483 | if (the_trace->trace_file_.get() != nullptr) { |
| 484 | // Do not try to erase, so flush and close explicitly. |
| 485 | if (flush_file) { |
| 486 | if (the_trace->trace_file_->Flush() != 0) { |
| 487 | PLOG(WARNING) << "Could not flush trace file."; |
| 488 | } |
| 489 | } else { |
| 490 | the_trace->trace_file_->MarkUnchecked(); // Do not trigger guard. |
| 491 | } |
| 492 | if (the_trace->trace_file_->Close() != 0) { |
| 493 | PLOG(ERROR) << "Could not close trace file."; |
| 494 | } |
| 495 | } |
| 496 | delete the_trace; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 497 | } |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 498 | if (stop_alloc_counting) { |
| 499 | // Can be racy since SetStatsEnabled is not guarded by any locks. |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 500 | runtime->SetStatsEnabled(false); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 501 | } |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 502 | } |
| 503 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 504 | void Trace::Abort() { |
| 505 | // Do not write anything anymore. |
| 506 | StopTracing(false, false); |
| 507 | } |
| 508 | |
| 509 | void Trace::Stop() { |
| 510 | // Finish writing. |
| 511 | StopTracing(true, true); |
| 512 | } |
| 513 | |
jeffhao | b5e8185 | 2012-03-12 11:15:45 -0700 | [diff] [blame] | 514 | void Trace::Shutdown() { |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 515 | if (GetMethodTracingMode() != kTracingInactive) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 516 | Stop(); |
jeffhao | b5e8185 | 2012-03-12 11:15:45 -0700 | [diff] [blame] | 517 | } |
jeffhao | b5e8185 | 2012-03-12 11:15:45 -0700 | [diff] [blame] | 518 | } |
| 519 | |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 520 | TracingMode Trace::GetMethodTracingMode() { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 521 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 522 | if (the_trace_ == nullptr) { |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 523 | return kTracingInactive; |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 524 | } else { |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 525 | switch (the_trace_->trace_mode_) { |
| 526 | case TraceMode::kSampling: |
| 527 | return kSampleProfilingActive; |
| 528 | case TraceMode::kMethodTracing: |
| 529 | return kMethodTracingActive; |
| 530 | } |
| 531 | LOG(FATAL) << "Unreachable"; |
| 532 | UNREACHABLE(); |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 533 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 534 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 535 | |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 536 | static constexpr size_t kMinBufSize = 18U; // Trace header is up to 18B. |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 537 | |
Andreas Gampe | 6ff3b37 | 2018-03-15 08:53:16 -0700 | [diff] [blame] | 538 | Trace::Trace(File* trace_file, |
| 539 | size_t buffer_size, |
| 540 | int flags, |
| 541 | TraceOutputMode output_mode, |
| 542 | TraceMode trace_mode) |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 543 | : trace_file_(trace_file), |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 544 | buf_(new uint8_t[std::max(kMinBufSize, buffer_size)]()), |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 545 | flags_(flags), trace_output_mode_(output_mode), trace_mode_(trace_mode), |
| 546 | clock_source_(default_clock_source_), |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 547 | buffer_size_(std::max(kMinBufSize, buffer_size)), |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 548 | start_time_(MicroTime()), clock_overhead_ns_(GetClockOverheadNanoSeconds()), |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 549 | overflow_(false), interval_us_(0), streaming_lock_(nullptr), |
Andreas Gampe | 7526d78 | 2015-06-22 22:53:45 -0700 | [diff] [blame] | 550 | unique_methods_lock_(new Mutex("unique methods lock", kTracingUniqueMethodsLock)) { |
Andreas Gampe | 6ff3b37 | 2018-03-15 08:53:16 -0700 | [diff] [blame] | 551 | CHECK(trace_file != nullptr || output_mode == TraceOutputMode::kDDMS); |
| 552 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 553 | uint16_t trace_version = GetTraceVersion(clock_source_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 554 | if (output_mode == TraceOutputMode::kStreaming) { |
| 555 | trace_version |= 0xF0U; |
| 556 | } |
| 557 | // Set up the beginning of the trace. |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 558 | memset(buf_.get(), 0, kTraceHeaderLength); |
| 559 | Append4LE(buf_.get(), kTraceMagicValue); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 560 | Append2LE(buf_.get() + 4, trace_version); |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 561 | Append2LE(buf_.get() + 6, kTraceHeaderLength); |
| 562 | Append8LE(buf_.get() + 8, start_time_); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 563 | if (trace_version >= kTraceVersionDualClock) { |
| 564 | uint16_t record_size = GetRecordSize(clock_source_); |
| 565 | Append2LE(buf_.get() + 16, record_size); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 566 | } |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 567 | static_assert(18 <= kMinBufSize, "Minimum buffer size not large enough for trace header"); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 568 | |
Orion Hodson | 88591fe | 2018-03-06 13:35:43 +0000 | [diff] [blame] | 569 | cur_offset_.store(kTraceHeaderLength, std::memory_order_relaxed); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 570 | |
| 571 | if (output_mode == TraceOutputMode::kStreaming) { |
Andreas Gampe | 7526d78 | 2015-06-22 22:53:45 -0700 | [diff] [blame] | 572 | streaming_lock_ = new Mutex("tracing lock", LockLevel::kTracingStreamingLock); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 573 | seen_threads_.reset(new ThreadIDBitSet()); |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | Trace::~Trace() { |
| 578 | delete streaming_lock_; |
Andreas Gampe | 7526d78 | 2015-06-22 22:53:45 -0700 | [diff] [blame] | 579 | delete unique_methods_lock_; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 580 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 581 | |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 582 | static uint64_t ReadBytes(uint8_t* buf, size_t bytes) { |
| 583 | uint64_t ret = 0; |
| 584 | for (size_t i = 0; i < bytes; ++i) { |
| 585 | ret |= static_cast<uint64_t>(buf[i]) << (i * 8); |
| 586 | } |
| 587 | return ret; |
| 588 | } |
| 589 | |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 590 | void Trace::DumpBuf(uint8_t* buf, size_t buf_size, TraceClockSource clock_source) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 591 | uint8_t* ptr = buf + kTraceHeaderLength; |
| 592 | uint8_t* end = buf + buf_size; |
| 593 | |
| 594 | while (ptr < end) { |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 595 | uint32_t tmid = ReadBytes(ptr + 2, sizeof(tmid)); |
| 596 | ArtMethod* method = DecodeTraceMethod(tmid); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 597 | TraceAction action = DecodeTraceAction(tmid); |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 598 | LOG(INFO) << ArtMethod::PrettyMethod(method) << " " << static_cast<int>(action); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 599 | ptr += GetRecordSize(clock_source); |
| 600 | } |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 601 | } |
| 602 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 603 | void Trace::FinishTracing() { |
| 604 | size_t final_offset = 0; |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 605 | std::set<ArtMethod*> visited_methods; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 606 | if (trace_output_mode_ == TraceOutputMode::kStreaming) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 607 | // Clean up. |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 608 | MutexLock mu(Thread::Current(), *streaming_lock_); |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 609 | STLDeleteValues(&seen_methods_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 610 | } else { |
Orion Hodson | 88591fe | 2018-03-06 13:35:43 +0000 | [diff] [blame] | 611 | final_offset = cur_offset_.load(std::memory_order_relaxed); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 612 | GetVisitedMethods(final_offset, &visited_methods); |
| 613 | } |
| 614 | |
| 615 | // Compute elapsed time. |
| 616 | uint64_t elapsed = MicroTime() - start_time_; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 617 | |
| 618 | std::ostringstream os; |
| 619 | |
| 620 | os << StringPrintf("%cversion\n", kTraceTokenChar); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 621 | os << StringPrintf("%d\n", GetTraceVersion(clock_source_)); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 622 | os << StringPrintf("data-file-overflow=%s\n", overflow_ ? "true" : "false"); |
| 623 | if (UseThreadCpuClock()) { |
| 624 | if (UseWallClock()) { |
| 625 | os << StringPrintf("clock=dual\n"); |
| 626 | } else { |
| 627 | os << StringPrintf("clock=thread-cpu\n"); |
| 628 | } |
| 629 | } else { |
| 630 | os << StringPrintf("clock=wall\n"); |
| 631 | } |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 632 | os << StringPrintf("elapsed-time-usec=%" PRIu64 "\n", elapsed); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 633 | if (trace_output_mode_ != TraceOutputMode::kStreaming) { |
| 634 | size_t num_records = (final_offset - kTraceHeaderLength) / GetRecordSize(clock_source_); |
| 635 | os << StringPrintf("num-method-calls=%zd\n", num_records); |
| 636 | } |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 637 | os << StringPrintf("clock-call-overhead-nsec=%d\n", clock_overhead_ns_); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 638 | os << StringPrintf("vm=art\n"); |
John Reck | 0624a27 | 2015-03-26 15:47:54 -0700 | [diff] [blame] | 639 | os << StringPrintf("pid=%d\n", getpid()); |
jeffhao | 0791adc | 2012-04-04 11:14:32 -0700 | [diff] [blame] | 640 | if ((flags_ & kTraceCountAllocs) != 0) { |
| 641 | os << StringPrintf("alloc-count=%d\n", Runtime::Current()->GetStat(KIND_ALLOCATED_OBJECTS)); |
| 642 | os << StringPrintf("alloc-size=%d\n", Runtime::Current()->GetStat(KIND_ALLOCATED_BYTES)); |
| 643 | os << StringPrintf("gc-count=%d\n", Runtime::Current()->GetStat(KIND_GC_INVOCATIONS)); |
| 644 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 645 | os << StringPrintf("%cthreads\n", kTraceTokenChar); |
| 646 | DumpThreadList(os); |
| 647 | os << StringPrintf("%cmethods\n", kTraceTokenChar); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 648 | DumpMethodList(os, visited_methods); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 649 | os << StringPrintf("%cend\n", kTraceTokenChar); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 650 | std::string header(os.str()); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 651 | |
| 652 | if (trace_output_mode_ == TraceOutputMode::kStreaming) { |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 653 | // Protect access to buf_ and satisfy sanitizer for calls to WriteBuf / FlushBuf. |
| 654 | MutexLock mu(Thread::Current(), *streaming_lock_); |
Shukang Zhou | 8a5ab91 | 2017-01-20 11:40:16 -0800 | [diff] [blame] | 655 | // Write a special token to mark the end of trace records and the start of |
| 656 | // trace summary. |
| 657 | uint8_t buf[7]; |
| 658 | Append2LE(buf, 0); |
| 659 | buf[2] = kOpTraceSummary; |
| 660 | Append4LE(buf + 3, static_cast<uint32_t>(header.length())); |
| 661 | WriteToBuf(buf, sizeof(buf)); |
| 662 | // Write the trace summary. The summary is identical to the file header when |
| 663 | // the output mode is not streaming (except for methods). |
| 664 | WriteToBuf(reinterpret_cast<const uint8_t*>(header.c_str()), header.length()); |
| 665 | // Flush the buffer, which may include some trace records before the summary. |
| 666 | FlushBuf(); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 667 | } else { |
| 668 | if (trace_file_.get() == nullptr) { |
Alex Light | 772099a | 2017-11-21 14:05:04 -0800 | [diff] [blame] | 669 | std::vector<uint8_t> data; |
| 670 | data.resize(header.length() + final_offset); |
| 671 | memcpy(data.data(), header.c_str(), header.length()); |
| 672 | memcpy(data.data() + header.length(), buf_.get(), final_offset); |
| 673 | Runtime::Current()->GetRuntimeCallbacks()->DdmPublishChunk(CHUNK_TYPE("MPSE"), |
| 674 | ArrayRef<const uint8_t>(data)); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 675 | const bool kDumpTraceInfo = false; |
| 676 | if (kDumpTraceInfo) { |
| 677 | LOG(INFO) << "Trace sent:\n" << header; |
| 678 | DumpBuf(buf_.get(), final_offset, clock_source_); |
| 679 | } |
| 680 | } else { |
| 681 | if (!trace_file_->WriteFully(header.c_str(), header.length()) || |
| 682 | !trace_file_->WriteFully(buf_.get(), final_offset)) { |
| 683 | std::string detail(StringPrintf("Trace data write failed: %s", strerror(errno))); |
| 684 | PLOG(ERROR) << detail; |
| 685 | ThrowRuntimeException("%s", detail.c_str()); |
| 686 | } |
| 687 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 688 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 689 | } |
| 690 | |
Roland Levillain | 4b8f1ec | 2015-08-26 18:34:03 +0100 | [diff] [blame] | 691 | void Trace::DexPcMoved(Thread* thread ATTRIBUTE_UNUSED, |
Alex Light | d766158 | 2017-05-01 13:48:16 -0700 | [diff] [blame] | 692 | Handle<mirror::Object> this_object ATTRIBUTE_UNUSED, |
Roland Levillain | 4b8f1ec | 2015-08-26 18:34:03 +0100 | [diff] [blame] | 693 | ArtMethod* method, |
| 694 | uint32_t new_dex_pc) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 695 | // We're not recorded to listen to this kind of event, so complain. |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 696 | LOG(ERROR) << "Unexpected dex PC event in tracing " << ArtMethod::PrettyMethod(method) |
| 697 | << " " << new_dex_pc; |
Andreas Gampe | c8ccf68 | 2014-09-29 20:07:43 -0700 | [diff] [blame] | 698 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 699 | |
Roland Levillain | 4b8f1ec | 2015-08-26 18:34:03 +0100 | [diff] [blame] | 700 | void Trace::FieldRead(Thread* thread ATTRIBUTE_UNUSED, |
Alex Light | d766158 | 2017-05-01 13:48:16 -0700 | [diff] [blame] | 701 | Handle<mirror::Object> this_object ATTRIBUTE_UNUSED, |
Roland Levillain | 4b8f1ec | 2015-08-26 18:34:03 +0100 | [diff] [blame] | 702 | ArtMethod* method, |
| 703 | uint32_t dex_pc, |
| 704 | ArtField* field ATTRIBUTE_UNUSED) |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 705 | REQUIRES_SHARED(Locks::mutator_lock_) { |
Sebastien Hertz | 3f52eaf | 2014-04-04 17:50:18 +0200 | [diff] [blame] | 706 | // We're not recorded to listen to this kind of event, so complain. |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 707 | LOG(ERROR) << "Unexpected field read event in tracing " << ArtMethod::PrettyMethod(method) |
| 708 | << " " << dex_pc; |
Sebastien Hertz | 3f52eaf | 2014-04-04 17:50:18 +0200 | [diff] [blame] | 709 | } |
| 710 | |
Roland Levillain | 4b8f1ec | 2015-08-26 18:34:03 +0100 | [diff] [blame] | 711 | void Trace::FieldWritten(Thread* thread ATTRIBUTE_UNUSED, |
Alex Light | d766158 | 2017-05-01 13:48:16 -0700 | [diff] [blame] | 712 | Handle<mirror::Object> this_object ATTRIBUTE_UNUSED, |
Roland Levillain | 4b8f1ec | 2015-08-26 18:34:03 +0100 | [diff] [blame] | 713 | ArtMethod* method, |
| 714 | uint32_t dex_pc, |
| 715 | ArtField* field ATTRIBUTE_UNUSED, |
| 716 | const JValue& field_value ATTRIBUTE_UNUSED) |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 717 | REQUIRES_SHARED(Locks::mutator_lock_) { |
Sebastien Hertz | 3f52eaf | 2014-04-04 17:50:18 +0200 | [diff] [blame] | 718 | // We're not recorded to listen to this kind of event, so complain. |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 719 | LOG(ERROR) << "Unexpected field write event in tracing " << ArtMethod::PrettyMethod(method) |
| 720 | << " " << dex_pc; |
Sebastien Hertz | 3f52eaf | 2014-04-04 17:50:18 +0200 | [diff] [blame] | 721 | } |
| 722 | |
Alex Light | d766158 | 2017-05-01 13:48:16 -0700 | [diff] [blame] | 723 | void Trace::MethodEntered(Thread* thread, |
| 724 | Handle<mirror::Object> this_object ATTRIBUTE_UNUSED, |
| 725 | ArtMethod* method, |
| 726 | uint32_t dex_pc ATTRIBUTE_UNUSED) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 727 | uint32_t thread_clock_diff = 0; |
| 728 | uint32_t wall_clock_diff = 0; |
| 729 | ReadClocks(thread, &thread_clock_diff, &wall_clock_diff); |
| 730 | LogMethodTraceEvent(thread, method, instrumentation::Instrumentation::kMethodEntered, |
| 731 | thread_clock_diff, wall_clock_diff); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 732 | } |
| 733 | |
Alex Light | d766158 | 2017-05-01 13:48:16 -0700 | [diff] [blame] | 734 | void Trace::MethodExited(Thread* thread, |
| 735 | Handle<mirror::Object> this_object ATTRIBUTE_UNUSED, |
| 736 | ArtMethod* method, |
| 737 | uint32_t dex_pc ATTRIBUTE_UNUSED, |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 738 | const JValue& return_value ATTRIBUTE_UNUSED) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 739 | uint32_t thread_clock_diff = 0; |
| 740 | uint32_t wall_clock_diff = 0; |
| 741 | ReadClocks(thread, &thread_clock_diff, &wall_clock_diff); |
| 742 | LogMethodTraceEvent(thread, method, instrumentation::Instrumentation::kMethodExited, |
| 743 | thread_clock_diff, wall_clock_diff); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 744 | } |
| 745 | |
Alex Light | d766158 | 2017-05-01 13:48:16 -0700 | [diff] [blame] | 746 | void Trace::MethodUnwind(Thread* thread, |
| 747 | Handle<mirror::Object> this_object ATTRIBUTE_UNUSED, |
| 748 | ArtMethod* method, |
| 749 | uint32_t dex_pc ATTRIBUTE_UNUSED) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 750 | uint32_t thread_clock_diff = 0; |
| 751 | uint32_t wall_clock_diff = 0; |
| 752 | ReadClocks(thread, &thread_clock_diff, &wall_clock_diff); |
| 753 | LogMethodTraceEvent(thread, method, instrumentation::Instrumentation::kMethodUnwind, |
| 754 | thread_clock_diff, wall_clock_diff); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 755 | } |
| 756 | |
Alex Light | 6e1607e | 2017-08-23 10:06:18 -0700 | [diff] [blame] | 757 | void Trace::ExceptionThrown(Thread* thread ATTRIBUTE_UNUSED, |
Alex Light | d766158 | 2017-05-01 13:48:16 -0700 | [diff] [blame] | 758 | Handle<mirror::Throwable> exception_object ATTRIBUTE_UNUSED) |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 759 | REQUIRES_SHARED(Locks::mutator_lock_) { |
Alex Light | 6e1607e | 2017-08-23 10:06:18 -0700 | [diff] [blame] | 760 | LOG(ERROR) << "Unexpected exception thrown event in tracing"; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 761 | } |
| 762 | |
Alex Light | 798eab0 | 2017-08-23 12:54:53 -0700 | [diff] [blame] | 763 | void Trace::ExceptionHandled(Thread* thread ATTRIBUTE_UNUSED, |
| 764 | Handle<mirror::Throwable> exception_object ATTRIBUTE_UNUSED) |
| 765 | REQUIRES_SHARED(Locks::mutator_lock_) { |
| 766 | LOG(ERROR) << "Unexpected exception thrown event in tracing"; |
| 767 | } |
| 768 | |
Nicolas Geoffray | 81f0f95 | 2016-01-20 16:25:19 +0000 | [diff] [blame] | 769 | void Trace::Branch(Thread* /*thread*/, ArtMethod* method, |
| 770 | uint32_t /*dex_pc*/, int32_t /*dex_pc_offset*/) |
Andreas Gampe | bdf7f1c | 2016-08-30 16:38:47 -0700 | [diff] [blame] | 771 | REQUIRES_SHARED(Locks::mutator_lock_) { |
David Sehr | 709b070 | 2016-10-13 09:12:37 -0700 | [diff] [blame] | 772 | LOG(ERROR) << "Unexpected branch event in tracing" << ArtMethod::PrettyMethod(method); |
Mathieu Chartier | e5f13e5 | 2015-02-24 09:37:21 -0800 | [diff] [blame] | 773 | } |
| 774 | |
Alex Light | 05f4774 | 2017-09-14 00:34:44 +0000 | [diff] [blame] | 775 | void Trace::WatchedFramePop(Thread* self ATTRIBUTE_UNUSED, |
| 776 | const ShadowFrame& frame ATTRIBUTE_UNUSED) { |
| 777 | LOG(ERROR) << "Unexpected WatchedFramePop event in tracing"; |
| 778 | } |
| 779 | |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 780 | void Trace::ReadClocks(Thread* thread, uint32_t* thread_clock_diff, uint32_t* wall_clock_diff) { |
| 781 | if (UseThreadCpuClock()) { |
| 782 | uint64_t clock_base = thread->GetTraceClockBase(); |
| 783 | if (UNLIKELY(clock_base == 0)) { |
| 784 | // First event, record the base time in the map. |
| 785 | uint64_t time = thread->GetCpuMicroTime(); |
| 786 | thread->SetTraceClockBase(time); |
| 787 | } else { |
| 788 | *thread_clock_diff = thread->GetCpuMicroTime() - clock_base; |
| 789 | } |
| 790 | } |
| 791 | if (UseWallClock()) { |
| 792 | *wall_clock_diff = MicroTime() - start_time_; |
| 793 | } |
| 794 | } |
| 795 | |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 796 | bool Trace::RegisterMethod(ArtMethod* method) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 797 | mirror::DexCache* dex_cache = method->GetDexCache(); |
Andreas Gampe | 7526d78 | 2015-06-22 22:53:45 -0700 | [diff] [blame] | 798 | const DexFile* dex_file = dex_cache->GetDexFile(); |
Andreas Gampe | 7526d78 | 2015-06-22 22:53:45 -0700 | [diff] [blame] | 799 | if (seen_methods_.find(dex_file) == seen_methods_.end()) { |
| 800 | seen_methods_.insert(std::make_pair(dex_file, new DexIndexBitSet())); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 801 | } |
Andreas Gampe | 7526d78 | 2015-06-22 22:53:45 -0700 | [diff] [blame] | 802 | DexIndexBitSet* bit_set = seen_methods_.find(dex_file)->second; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 803 | if (!(*bit_set)[method->GetDexMethodIndex()]) { |
| 804 | bit_set->set(method->GetDexMethodIndex()); |
| 805 | return true; |
| 806 | } |
| 807 | return false; |
| 808 | } |
| 809 | |
| 810 | bool Trace::RegisterThread(Thread* thread) { |
| 811 | pid_t tid = thread->GetTid(); |
| 812 | CHECK_LT(0U, static_cast<uint32_t>(tid)); |
Alex Light | a344f6a | 2016-07-20 10:43:39 -0700 | [diff] [blame] | 813 | CHECK_LT(static_cast<uint32_t>(tid), kMaxThreadIdNumber); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 814 | |
| 815 | if (!(*seen_threads_)[tid]) { |
| 816 | seen_threads_->set(tid); |
| 817 | return true; |
| 818 | } |
| 819 | return false; |
| 820 | } |
| 821 | |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 822 | std::string Trace::GetMethodLine(ArtMethod* method) { |
Andreas Gampe | 542451c | 2016-07-26 09:02:02 -0700 | [diff] [blame] | 823 | method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize); |
Alex Light | 0f7e8f5 | 2016-07-19 11:21:32 -0700 | [diff] [blame] | 824 | return StringPrintf("%#x\t%s\t%s\t%s\t%s\n", (EncodeTraceMethod(method) << TraceActionBits), |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 825 | PrettyDescriptor(method->GetDeclaringClassDescriptor()).c_str(), method->GetName(), |
| 826 | method->GetSignature().ToString().c_str(), method->GetDeclaringClassSourceFile()); |
| 827 | } |
| 828 | |
| 829 | void Trace::WriteToBuf(const uint8_t* src, size_t src_size) { |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 830 | // Updates to cur_offset_ are done under the streaming_lock_ here as in streaming mode. |
Orion Hodson | 88591fe | 2018-03-06 13:35:43 +0000 | [diff] [blame] | 831 | int32_t old_offset = cur_offset_.load(std::memory_order_relaxed); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 832 | int32_t new_offset = old_offset + static_cast<int32_t>(src_size); |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 833 | if (dchecked_integral_cast<size_t>(new_offset) > buffer_size_) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 834 | // Flush buffer. |
| 835 | if (!trace_file_->WriteFully(buf_.get(), old_offset)) { |
| 836 | PLOG(WARNING) << "Failed streaming a tracing event."; |
| 837 | } |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 838 | |
| 839 | // Check whether the data is too large for the buffer, then write immediately. |
| 840 | if (src_size >= buffer_size_) { |
| 841 | if (!trace_file_->WriteFully(src, src_size)) { |
| 842 | PLOG(WARNING) << "Failed streaming a tracing event."; |
| 843 | } |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 844 | cur_offset_.store(0, std::memory_order_relaxed); // Buffer is empty now. |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 845 | return; |
| 846 | } |
| 847 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 848 | old_offset = 0; |
| 849 | new_offset = static_cast<int32_t>(src_size); |
| 850 | } |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 851 | cur_offset_.store(new_offset, std::memory_order_relaxed); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 852 | // Fill in data. |
| 853 | memcpy(buf_.get() + old_offset, src, src_size); |
| 854 | } |
| 855 | |
Shukang Zhou | 8a5ab91 | 2017-01-20 11:40:16 -0800 | [diff] [blame] | 856 | void Trace::FlushBuf() { |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 857 | // Updates to cur_offset_ are done under the streaming_lock_ here as in streaming mode. |
Orion Hodson | 88591fe | 2018-03-06 13:35:43 +0000 | [diff] [blame] | 858 | int32_t offset = cur_offset_.load(std::memory_order_relaxed); |
Shukang Zhou | 8a5ab91 | 2017-01-20 11:40:16 -0800 | [diff] [blame] | 859 | if (!trace_file_->WriteFully(buf_.get(), offset)) { |
| 860 | PLOG(WARNING) << "Failed flush the remaining data in streaming."; |
| 861 | } |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 862 | cur_offset_.store(0, std::memory_order_relaxed); |
Shukang Zhou | 8a5ab91 | 2017-01-20 11:40:16 -0800 | [diff] [blame] | 863 | } |
| 864 | |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 865 | void Trace::LogMethodTraceEvent(Thread* thread, ArtMethod* method, |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 866 | instrumentation::Instrumentation::InstrumentationEvent event, |
| 867 | uint32_t thread_clock_diff, uint32_t wall_clock_diff) { |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 868 | // This method is called in both tracing modes (method and |
| 869 | // sampling). In sampling mode, this method is only called by the |
| 870 | // sampling thread. In method tracing mode, it can be called |
| 871 | // concurrently. |
| 872 | |
Alex Light | 4ba388a | 2017-01-27 10:26:49 -0800 | [diff] [blame] | 873 | // Ensure we always use the non-obsolete version of the method so that entry/exit events have the |
| 874 | // same pointer value. |
| 875 | method = method->GetNonObsoleteMethod(); |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 876 | |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 877 | // Advance cur_offset_ atomically. |
| 878 | int32_t new_offset; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 879 | int32_t old_offset = 0; |
| 880 | |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 881 | // In the non-streaming case, we do a busy loop here trying to get |
| 882 | // an offset to write our record and advance cur_offset_ for the |
| 883 | // next use. |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 884 | if (trace_output_mode_ != TraceOutputMode::kStreaming) { |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 885 | // Although multiple threads can call this method concurrently, |
| 886 | // the compare_exchange_weak here is still atomic (by definition). |
| 887 | // A succeeding update is visible to other cores when they pass |
| 888 | // through this point. |
| 889 | old_offset = cur_offset_.load(std::memory_order_relaxed); // Speculative read |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 890 | do { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 891 | new_offset = old_offset + GetRecordSize(clock_source_); |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 892 | if (static_cast<size_t>(new_offset) > buffer_size_) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 893 | overflow_ = true; |
| 894 | return; |
| 895 | } |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 896 | } while (!cur_offset_.compare_exchange_weak(old_offset, new_offset, std::memory_order_relaxed)); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 897 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 898 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 899 | TraceAction action = kTraceMethodEnter; |
| 900 | switch (event) { |
| 901 | case instrumentation::Instrumentation::kMethodEntered: |
| 902 | action = kTraceMethodEnter; |
| 903 | break; |
| 904 | case instrumentation::Instrumentation::kMethodExited: |
| 905 | action = kTraceMethodExit; |
| 906 | break; |
| 907 | case instrumentation::Instrumentation::kMethodUnwind: |
| 908 | action = kTraceUnroll; |
| 909 | break; |
| 910 | default: |
| 911 | UNIMPLEMENTED(FATAL) << "Unexpected event: " << event; |
| 912 | } |
| 913 | |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 914 | uint32_t method_value = EncodeTraceMethodAndAction(method, action); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 915 | |
Orion Hodson | 283ad2d | 2018-03-26 13:37:41 +0100 | [diff] [blame] | 916 | // Write data into the tracing buffer (if not streaming) or into a |
| 917 | // small buffer on the stack (if streaming) which we'll put into the |
| 918 | // tracing buffer below. |
| 919 | // |
| 920 | // These writes to the tracing buffer are synchronised with the |
| 921 | // future reads that (only) occur under FinishTracing(). The callers |
| 922 | // of FinishTracing() acquire locks and (implicitly) synchronise |
| 923 | // the buffer memory. |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 924 | uint8_t* ptr; |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 925 | static constexpr size_t kPacketSize = 14U; // The maximum size of data in a packet. |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 926 | uint8_t stack_buf[kPacketSize]; // Space to store a packet when in streaming mode. |
| 927 | if (trace_output_mode_ == TraceOutputMode::kStreaming) { |
| 928 | ptr = stack_buf; |
| 929 | } else { |
| 930 | ptr = buf_.get() + old_offset; |
| 931 | } |
| 932 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 933 | Append2LE(ptr, thread->GetTid()); |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 934 | Append4LE(ptr + 2, method_value); |
| 935 | ptr += 6; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 936 | |
| 937 | if (UseThreadCpuClock()) { |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 938 | Append4LE(ptr, thread_clock_diff); |
| 939 | ptr += 4; |
| 940 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 941 | if (UseWallClock()) { |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 942 | Append4LE(ptr, wall_clock_diff); |
| 943 | } |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 944 | static_assert(kPacketSize == 2 + 4 + 4 + 4, "Packet size incorrect."); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 945 | |
| 946 | if (trace_output_mode_ == TraceOutputMode::kStreaming) { |
| 947 | MutexLock mu(Thread::Current(), *streaming_lock_); // To serialize writing. |
| 948 | if (RegisterMethod(method)) { |
| 949 | // Write a special block with the name. |
| 950 | std::string method_line(GetMethodLine(method)); |
| 951 | uint8_t buf2[5]; |
| 952 | Append2LE(buf2, 0); |
| 953 | buf2[2] = kOpNewMethod; |
| 954 | Append2LE(buf2 + 3, static_cast<uint16_t>(method_line.length())); |
| 955 | WriteToBuf(buf2, sizeof(buf2)); |
| 956 | WriteToBuf(reinterpret_cast<const uint8_t*>(method_line.c_str()), method_line.length()); |
| 957 | } |
| 958 | if (RegisterThread(thread)) { |
| 959 | // It might be better to postpone this. Threads might not have received names... |
| 960 | std::string thread_name; |
| 961 | thread->GetThreadName(thread_name); |
| 962 | uint8_t buf2[7]; |
| 963 | Append2LE(buf2, 0); |
| 964 | buf2[2] = kOpNewThread; |
| 965 | Append2LE(buf2 + 3, static_cast<uint16_t>(thread->GetTid())); |
| 966 | Append2LE(buf2 + 5, static_cast<uint16_t>(thread_name.length())); |
| 967 | WriteToBuf(buf2, sizeof(buf2)); |
| 968 | WriteToBuf(reinterpret_cast<const uint8_t*>(thread_name.c_str()), thread_name.length()); |
| 969 | } |
| 970 | WriteToBuf(stack_buf, sizeof(stack_buf)); |
| 971 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 972 | } |
| 973 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 974 | void Trace::GetVisitedMethods(size_t buf_size, |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 975 | std::set<ArtMethod*>* visited_methods) { |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 976 | uint8_t* ptr = buf_.get() + kTraceHeaderLength; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 977 | uint8_t* end = buf_.get() + buf_size; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 978 | |
| 979 | while (ptr < end) { |
Mathieu Chartier | 4d64cd4 | 2015-06-02 16:38:29 -0700 | [diff] [blame] | 980 | uint32_t tmid = ReadBytes(ptr + 2, sizeof(tmid)); |
| 981 | ArtMethod* method = DecodeTraceMethod(tmid); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 982 | visited_methods->insert(method); |
| 983 | ptr += GetRecordSize(clock_source_); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 984 | } |
| 985 | } |
| 986 | |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 987 | void Trace::DumpMethodList(std::ostream& os, const std::set<ArtMethod*>& visited_methods) { |
Mathieu Chartier | 02e2511 | 2013-08-14 16:14:24 -0700 | [diff] [blame] | 988 | for (const auto& method : visited_methods) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 989 | os << GetMethodLine(method); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 990 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 991 | } |
| 992 | |
| 993 | static void DumpThread(Thread* t, void* arg) { |
Elliott Hughes | ffb465f | 2012-03-01 18:46:05 -0800 | [diff] [blame] | 994 | std::ostream& os = *reinterpret_cast<std::ostream*>(arg); |
| 995 | std::string name; |
| 996 | t->GetThreadName(name); |
| 997 | os << t->GetTid() << "\t" << name << "\n"; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 998 | } |
| 999 | |
| 1000 | void Trace::DumpThreadList(std::ostream& os) { |
Ian Rogers | 81d425b | 2012-09-27 16:03:43 -0700 | [diff] [blame] | 1001 | Thread* self = Thread::Current(); |
Stephen Hines | 48ba197 | 2018-09-24 13:35:54 -0700 | [diff] [blame] | 1002 | for (const auto& it : exited_threads_) { |
Jeff Hao | e094b87 | 2014-10-14 13:12:01 -0700 | [diff] [blame] | 1003 | os << it.first << "\t" << it.second << "\n"; |
| 1004 | } |
Ian Rogers | 81d425b | 2012-09-27 16:03:43 -0700 | [diff] [blame] | 1005 | Locks::thread_list_lock_->AssertNotHeld(self); |
| 1006 | MutexLock mu(self, *Locks::thread_list_lock_); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 1007 | Runtime::Current()->GetThreadList()->ForEach(DumpThread, &os); |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 1008 | } |
| 1009 | |
Jeff Hao | e094b87 | 2014-10-14 13:12:01 -0700 | [diff] [blame] | 1010 | void Trace::StoreExitingThreadInfo(Thread* thread) { |
| 1011 | MutexLock mu(thread, *Locks::trace_lock_); |
| 1012 | if (the_trace_ != nullptr) { |
| 1013 | std::string name; |
| 1014 | thread->GetThreadName(name); |
Andreas Gampe | a1785c5 | 2014-11-25 20:40:08 -0800 | [diff] [blame] | 1015 | // The same thread/tid may be used multiple times. As SafeMap::Put does not allow to override |
| 1016 | // a previous mapping, use SafeMap::Overwrite. |
| 1017 | the_trace_->exited_threads_.Overwrite(thread->GetTid(), name); |
Jeff Hao | e094b87 | 2014-10-14 13:12:01 -0700 | [diff] [blame] | 1018 | } |
| 1019 | } |
| 1020 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 1021 | Trace::TraceOutputMode Trace::GetOutputMode() { |
| 1022 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 1023 | CHECK(the_trace_ != nullptr) << "Trace output mode requested, but no trace currently running"; |
| 1024 | return the_trace_->trace_output_mode_; |
| 1025 | } |
| 1026 | |
| 1027 | Trace::TraceMode Trace::GetMode() { |
| 1028 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 1029 | CHECK(the_trace_ != nullptr) << "Trace mode requested, but no trace currently running"; |
| 1030 | return the_trace_->trace_mode_; |
| 1031 | } |
| 1032 | |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 1033 | size_t Trace::GetBufferSize() { |
| 1034 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 1035 | CHECK(the_trace_ != nullptr) << "Trace mode requested, but no trace currently running"; |
| 1036 | return the_trace_->buffer_size_; |
| 1037 | } |
| 1038 | |
Mathieu Chartier | 7778b88 | 2015-10-05 16:41:10 -0700 | [diff] [blame] | 1039 | bool Trace::IsTracingEnabled() { |
| 1040 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 1041 | return the_trace_ != nullptr; |
| 1042 | } |
| 1043 | |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 1044 | } // namespace art |