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 | |
Ian Rogers | cf7f191 | 2014-10-22 22:06:39 -0700 | [diff] [blame] | 22 | #define ATRACE_TAG ATRACE_TAG_DALVIK |
| 23 | #include "cutils/trace.h" |
| 24 | |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 25 | #include "base/casts.h" |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 26 | #include "base/stl_util.h" |
Elliott Hughes | 7616005 | 2012-12-12 16:31:20 -0800 | [diff] [blame] | 27 | #include "base/unix_file/fd_file.h" |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 28 | #include "class_linker.h" |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 29 | #include "common_throws.h" |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 30 | #include "debugger.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 31 | #include "dex_file-inl.h" |
jeffhao | 725a957 | 2012-11-13 18:20:12 -0800 | [diff] [blame] | 32 | #include "instrumentation.h" |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 33 | #include "mirror/art_method-inl.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 34 | #include "mirror/class-inl.h" |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 35 | #include "mirror/dex_cache-inl.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 36 | #include "mirror/object_array-inl.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 37 | #include "mirror/object-inl.h" |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 38 | #include "os.h" |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 39 | #include "scoped_thread_state_change.h" |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 40 | #include "ScopedLocalRef.h" |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 41 | #include "thread.h" |
Ian Rogers | 57b86d4 | 2012-03-27 16:05:41 -0700 | [diff] [blame] | 42 | #include "thread_list.h" |
Ian Rogers | 166db04 | 2013-07-26 12:05:57 -0700 | [diff] [blame] | 43 | #include "entrypoints/quick/quick_entrypoints.h" |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 44 | |
| 45 | namespace art { |
| 46 | |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 47 | // File format: |
| 48 | // header |
| 49 | // record 0 |
| 50 | // record 1 |
| 51 | // ... |
| 52 | // |
| 53 | // Header format: |
| 54 | // u4 magic ('SLOW') |
| 55 | // u2 version |
| 56 | // u2 offset to data |
| 57 | // u8 start date/time in usec |
| 58 | // u2 record size in bytes (version >= 2 only) |
| 59 | // ... padding to 32 bytes |
| 60 | // |
| 61 | // Record format v1: |
| 62 | // u1 thread ID |
| 63 | // u4 method ID | method action |
| 64 | // u4 time delta since start, in usec |
| 65 | // |
| 66 | // Record format v2: |
| 67 | // u2 thread ID |
| 68 | // u4 method ID | method action |
| 69 | // u4 time delta since start, in usec |
| 70 | // |
| 71 | // Record format v3: |
| 72 | // u2 thread ID |
| 73 | // u4 method ID | method action |
| 74 | // u4 time delta since start, in usec |
| 75 | // u4 wall time since start, in usec (when clock == "dual" only) |
| 76 | // |
| 77 | // 32 bits of microseconds is 70 minutes. |
| 78 | // |
| 79 | // All values are stored in little-endian order. |
| 80 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 81 | enum TraceAction { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 82 | kTraceMethodEnter = 0x00, // method entry |
| 83 | kTraceMethodExit = 0x01, // method exit |
| 84 | kTraceUnroll = 0x02, // method exited by exception unrolling |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 85 | // 0x03 currently unused |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 86 | kTraceMethodActionMask = 0x03, // two bits |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 87 | }; |
| 88 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 89 | static constexpr uint8_t kOpNewMethod = 1U; |
| 90 | static constexpr uint8_t kOpNewThread = 2U; |
| 91 | |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 92 | class BuildStackTraceVisitor : public StackVisitor { |
| 93 | public: |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 94 | explicit BuildStackTraceVisitor(Thread* thread) : StackVisitor(thread, nullptr), |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 95 | method_trace_(Trace::AllocStackTrace()) {} |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 96 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 97 | bool VisitFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | e2f77e7 | 2013-08-13 19:19:40 -0700 | [diff] [blame] | 98 | mirror::ArtMethod* m = GetMethod(); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 99 | // Ignore runtime frames (in particular callee save). |
| 100 | if (!m->IsRuntimeMethod()) { |
| 101 | method_trace_->push_back(m); |
| 102 | } |
| 103 | return true; |
| 104 | } |
| 105 | |
| 106 | // Returns a stack trace where the topmost frame corresponds with the first element of the vector. |
Ian Rogers | e2f77e7 | 2013-08-13 19:19:40 -0700 | [diff] [blame] | 107 | std::vector<mirror::ArtMethod*>* GetStackTrace() const { |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 108 | return method_trace_; |
| 109 | } |
| 110 | |
| 111 | private: |
Ian Rogers | e2f77e7 | 2013-08-13 19:19:40 -0700 | [diff] [blame] | 112 | std::vector<mirror::ArtMethod*>* const method_trace_; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 113 | }; |
| 114 | |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 115 | static const char kTraceTokenChar = '*'; |
| 116 | static const uint16_t kTraceHeaderLength = 32; |
| 117 | static const uint32_t kTraceMagicValue = 0x574f4c53; |
| 118 | static const uint16_t kTraceVersionSingleClock = 2; |
| 119 | static const uint16_t kTraceVersionDualClock = 3; |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 120 | static const uint16_t kTraceRecordSizeSingleClock = 10; // using v2 |
| 121 | static const uint16_t kTraceRecordSizeDualClock = 14; // using v3 with two timestamps |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 122 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 123 | TraceClockSource Trace::default_clock_source_ = kDefaultTraceClockSource; |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 124 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 125 | Trace* volatile Trace::the_trace_ = nullptr; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 126 | pthread_t Trace::sampling_pthread_ = 0U; |
Ian Rogers | 700a402 | 2014-05-19 16:49:03 -0700 | [diff] [blame] | 127 | std::unique_ptr<std::vector<mirror::ArtMethod*>> Trace::temp_stack_trace_; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 128 | |
Sebastien Hertz | 0462c4c | 2015-04-01 16:34:17 +0200 | [diff] [blame^] | 129 | // The key identifying the tracer to update instrumentation. |
| 130 | static constexpr const char* kTracerInstrumentationKey = "Tracer"; |
| 131 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 132 | static mirror::ArtMethod* DecodeTraceMethodId(uint32_t tmid) { |
| 133 | return reinterpret_cast<mirror::ArtMethod*>(tmid & ~kTraceMethodActionMask); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 134 | } |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 135 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 136 | static TraceAction DecodeTraceAction(uint32_t tmid) { |
| 137 | return static_cast<TraceAction>(tmid & kTraceMethodActionMask); |
| 138 | } |
| 139 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 140 | static uint32_t EncodeTraceMethodAndAction(mirror::ArtMethod* method, |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 141 | TraceAction action) { |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 142 | uint32_t tmid = PointerToLowMemUInt32(method) | action; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 143 | DCHECK_EQ(method, DecodeTraceMethodId(tmid)); |
| 144 | return tmid; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 145 | } |
| 146 | |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 147 | std::vector<mirror::ArtMethod*>* Trace::AllocStackTrace() { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 148 | if (temp_stack_trace_.get() != nullptr) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 149 | return temp_stack_trace_.release(); |
| 150 | } else { |
| 151 | return new std::vector<mirror::ArtMethod*>(); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | void Trace::FreeStackTrace(std::vector<mirror::ArtMethod*>* stack_trace) { |
| 156 | stack_trace->clear(); |
| 157 | temp_stack_trace_.reset(stack_trace); |
| 158 | } |
| 159 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 160 | void Trace::SetDefaultClockSource(TraceClockSource clock_source) { |
Elliott Hughes | 0a18df8 | 2015-01-09 15:16:16 -0800 | [diff] [blame] | 161 | #if defined(__linux__) |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 162 | default_clock_source_ = clock_source; |
| 163 | #else |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 164 | if (clock_source != TraceClockSource::kWall) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 165 | LOG(WARNING) << "Ignoring tracing request to use CPU time."; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 166 | } |
| 167 | #endif |
| 168 | } |
| 169 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 170 | static uint16_t GetTraceVersion(TraceClockSource clock_source) { |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 171 | return (clock_source == TraceClockSource::kDual) ? kTraceVersionDualClock |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 172 | : kTraceVersionSingleClock; |
| 173 | } |
| 174 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 175 | static uint16_t GetRecordSize(TraceClockSource clock_source) { |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 176 | return (clock_source == TraceClockSource::kDual) ? kTraceRecordSizeDualClock |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 177 | : kTraceRecordSizeSingleClock; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 178 | } |
| 179 | |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 180 | bool Trace::UseThreadCpuClock() { |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 181 | return (clock_source_ == TraceClockSource::kThreadCpu) || |
| 182 | (clock_source_ == TraceClockSource::kDual); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 183 | } |
| 184 | |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 185 | bool Trace::UseWallClock() { |
Igor Murashkin | aaebaa0 | 2015-01-26 10:55:53 -0800 | [diff] [blame] | 186 | return (clock_source_ == TraceClockSource::kWall) || |
| 187 | (clock_source_ == TraceClockSource::kDual); |
Elliott Hughes | e119a36 | 2012-05-22 17:37:06 -0700 | [diff] [blame] | 188 | } |
| 189 | |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 190 | void Trace::MeasureClockOverhead() { |
| 191 | if (UseThreadCpuClock()) { |
Jeff Hao | 57dac6e | 2013-08-15 16:36:24 -0700 | [diff] [blame] | 192 | Thread::Current()->GetCpuMicroTime(); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 193 | } |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 194 | if (UseWallClock()) { |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 195 | MicroTime(); |
| 196 | } |
| 197 | } |
| 198 | |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 199 | // Compute an average time taken to measure clocks. |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 200 | uint32_t Trace::GetClockOverheadNanoSeconds() { |
Jeff Hao | 57dac6e | 2013-08-15 16:36:24 -0700 | [diff] [blame] | 201 | Thread* self = Thread::Current(); |
| 202 | uint64_t start = self->GetCpuMicroTime(); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 203 | |
| 204 | for (int i = 4000; i > 0; i--) { |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 205 | MeasureClockOverhead(); |
| 206 | MeasureClockOverhead(); |
| 207 | MeasureClockOverhead(); |
| 208 | MeasureClockOverhead(); |
| 209 | MeasureClockOverhead(); |
| 210 | MeasureClockOverhead(); |
| 211 | MeasureClockOverhead(); |
| 212 | MeasureClockOverhead(); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 213 | } |
| 214 | |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 215 | uint64_t elapsed_us = self->GetCpuMicroTime() - start; |
| 216 | return static_cast<uint32_t>(elapsed_us / 32); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 217 | } |
| 218 | |
Elliott Hughes | ffb465f | 2012-03-01 18:46:05 -0800 | [diff] [blame] | 219 | // TODO: put this somewhere with the big-endian equivalent used by JDWP. |
| 220 | static void Append2LE(uint8_t* buf, uint16_t val) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 221 | *buf++ = static_cast<uint8_t>(val); |
| 222 | *buf++ = static_cast<uint8_t>(val >> 8); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 223 | } |
| 224 | |
Elliott Hughes | ffb465f | 2012-03-01 18:46:05 -0800 | [diff] [blame] | 225 | // TODO: put this somewhere with the big-endian equivalent used by JDWP. |
| 226 | static void Append4LE(uint8_t* buf, uint32_t val) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 227 | *buf++ = static_cast<uint8_t>(val); |
| 228 | *buf++ = static_cast<uint8_t>(val >> 8); |
| 229 | *buf++ = static_cast<uint8_t>(val >> 16); |
| 230 | *buf++ = static_cast<uint8_t>(val >> 24); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 231 | } |
| 232 | |
Elliott Hughes | ffb465f | 2012-03-01 18:46:05 -0800 | [diff] [blame] | 233 | // TODO: put this somewhere with the big-endian equivalent used by JDWP. |
| 234 | static void Append8LE(uint8_t* buf, uint64_t val) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 235 | *buf++ = static_cast<uint8_t>(val); |
| 236 | *buf++ = static_cast<uint8_t>(val >> 8); |
| 237 | *buf++ = static_cast<uint8_t>(val >> 16); |
| 238 | *buf++ = static_cast<uint8_t>(val >> 24); |
| 239 | *buf++ = static_cast<uint8_t>(val >> 32); |
| 240 | *buf++ = static_cast<uint8_t>(val >> 40); |
| 241 | *buf++ = static_cast<uint8_t>(val >> 48); |
| 242 | *buf++ = static_cast<uint8_t>(val >> 56); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 243 | } |
| 244 | |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 245 | static void GetSample(Thread* thread, void* arg) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 246 | BuildStackTraceVisitor build_trace_visitor(thread); |
| 247 | build_trace_visitor.WalkStack(); |
Ian Rogers | e2f77e7 | 2013-08-13 19:19:40 -0700 | [diff] [blame] | 248 | std::vector<mirror::ArtMethod*>* stack_trace = build_trace_visitor.GetStackTrace(); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 249 | Trace* the_trace = reinterpret_cast<Trace*>(arg); |
| 250 | the_trace->CompareAndUpdateStackTrace(thread, stack_trace); |
| 251 | } |
| 252 | |
Andreas Gampe | ca71458 | 2015-04-03 19:41:34 -0700 | [diff] [blame] | 253 | static void ClearThreadStackTraceAndClockBase(Thread* thread, void* arg ATTRIBUTE_UNUSED) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 254 | thread->SetTraceClockBase(0); |
| 255 | std::vector<mirror::ArtMethod*>* stack_trace = thread->GetStackTraceSample(); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 256 | thread->SetStackTraceSample(nullptr); |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 257 | delete stack_trace; |
| 258 | } |
| 259 | |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 260 | void Trace::CompareAndUpdateStackTrace(Thread* thread, |
Ian Rogers | e2f77e7 | 2013-08-13 19:19:40 -0700 | [diff] [blame] | 261 | std::vector<mirror::ArtMethod*>* stack_trace) { |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 262 | CHECK_EQ(pthread_self(), sampling_pthread_); |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 263 | std::vector<mirror::ArtMethod*>* old_stack_trace = thread->GetStackTraceSample(); |
| 264 | // Update the thread's stack trace sample. |
| 265 | thread->SetStackTraceSample(stack_trace); |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 266 | // Read timer clocks to use for all events in this trace. |
| 267 | uint32_t thread_clock_diff = 0; |
| 268 | uint32_t wall_clock_diff = 0; |
| 269 | ReadClocks(thread, &thread_clock_diff, &wall_clock_diff); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 270 | if (old_stack_trace == nullptr) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 271 | // 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] | 272 | // methods in the trace. |
Ian Rogers | e2f77e7 | 2013-08-13 19:19:40 -0700 | [diff] [blame] | 273 | for (std::vector<mirror::ArtMethod*>::reverse_iterator rit = stack_trace->rbegin(); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 274 | rit != stack_trace->rend(); ++rit) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 275 | LogMethodTraceEvent(thread, *rit, instrumentation::Instrumentation::kMethodEntered, |
| 276 | thread_clock_diff, wall_clock_diff); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 277 | } |
| 278 | } else { |
| 279 | // If there's a previous stack trace for this thread, diff the traces and emit entry and exit |
| 280 | // events accordingly. |
Ian Rogers | e2f77e7 | 2013-08-13 19:19:40 -0700 | [diff] [blame] | 281 | std::vector<mirror::ArtMethod*>::reverse_iterator old_rit = old_stack_trace->rbegin(); |
| 282 | std::vector<mirror::ArtMethod*>::reverse_iterator rit = stack_trace->rbegin(); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 283 | // Iterate bottom-up over both traces until there's a difference between them. |
| 284 | while (old_rit != old_stack_trace->rend() && rit != stack_trace->rend() && *old_rit == *rit) { |
| 285 | old_rit++; |
| 286 | rit++; |
| 287 | } |
| 288 | // Iterate top-down over the old trace until the point where they differ, emitting exit events. |
Ian Rogers | e2f77e7 | 2013-08-13 19:19:40 -0700 | [diff] [blame] | 289 | for (std::vector<mirror::ArtMethod*>::iterator old_it = old_stack_trace->begin(); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 290 | old_it != old_rit.base(); ++old_it) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 291 | LogMethodTraceEvent(thread, *old_it, instrumentation::Instrumentation::kMethodExited, |
| 292 | thread_clock_diff, wall_clock_diff); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 293 | } |
| 294 | // Iterate bottom-up over the new trace from the point where they differ, emitting entry events. |
| 295 | for (; rit != stack_trace->rend(); ++rit) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 296 | LogMethodTraceEvent(thread, *rit, instrumentation::Instrumentation::kMethodEntered, |
| 297 | thread_clock_diff, wall_clock_diff); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 298 | } |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 299 | FreeStackTrace(old_stack_trace); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 300 | } |
| 301 | } |
| 302 | |
| 303 | void* Trace::RunSamplingThread(void* arg) { |
| 304 | Runtime* runtime = Runtime::Current(); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 305 | intptr_t interval_us = reinterpret_cast<intptr_t>(arg); |
Jeff Hao | 4044bda | 2014-01-06 15:50:45 -0800 | [diff] [blame] | 306 | CHECK_GE(interval_us, 0); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 307 | CHECK(runtime->AttachCurrentThread("Sampling Profiler", true, runtime->GetSystemThreadGroup(), |
Mathieu Chartier | e5f13e5 | 2015-02-24 09:37:21 -0800 | [diff] [blame] | 308 | !runtime->IsAotCompiler())); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 309 | |
| 310 | while (true) { |
Jeff Hao | 23009dc | 2013-08-22 15:36:42 -0700 | [diff] [blame] | 311 | usleep(interval_us); |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 312 | ATRACE_BEGIN("Profile sampling"); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 313 | Thread* self = Thread::Current(); |
| 314 | Trace* the_trace; |
| 315 | { |
| 316 | MutexLock mu(self, *Locks::trace_lock_); |
| 317 | the_trace = the_trace_; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 318 | if (the_trace == nullptr) { |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 319 | break; |
| 320 | } |
| 321 | } |
| 322 | |
Mathieu Chartier | bf9fc58 | 2015-03-13 17:21:25 -0700 | [diff] [blame] | 323 | runtime->GetThreadList()->SuspendAll(__FUNCTION__); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 324 | { |
| 325 | MutexLock mu(self, *Locks::thread_list_lock_); |
| 326 | runtime->GetThreadList()->ForEach(GetSample, the_trace); |
| 327 | } |
| 328 | runtime->GetThreadList()->ResumeAll(); |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 329 | ATRACE_END(); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | runtime->DetachCurrentThread(); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 333 | return nullptr; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 334 | } |
| 335 | |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 336 | void Trace::Start(const char* trace_filename, int trace_fd, size_t buffer_size, int flags, |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 337 | TraceOutputMode output_mode, TraceMode trace_mode, int interval_us) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 338 | Thread* self = Thread::Current(); |
| 339 | { |
| 340 | MutexLock mu(self, *Locks::trace_lock_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 341 | if (the_trace_ != nullptr) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 342 | LOG(ERROR) << "Trace already in progress, ignoring this request"; |
| 343 | return; |
| 344 | } |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 345 | } |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 346 | |
| 347 | // Check interval if sampling is enabled |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 348 | if (trace_mode == TraceMode::kSampling && interval_us <= 0) { |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 349 | LOG(ERROR) << "Invalid sampling interval: " << interval_us; |
| 350 | ScopedObjectAccess soa(self); |
| 351 | ThrowRuntimeException("Invalid sampling interval: %d", interval_us); |
| 352 | return; |
| 353 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 354 | |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 355 | // Open trace file if not going directly to ddms. |
Ian Rogers | 700a402 | 2014-05-19 16:49:03 -0700 | [diff] [blame] | 356 | std::unique_ptr<File> trace_file; |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 357 | if (output_mode != TraceOutputMode::kDDMS) { |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 358 | if (trace_fd < 0) { |
Brian Carlstrom | 7571e8b | 2013-08-12 17:04:14 -0700 | [diff] [blame] | 359 | trace_file.reset(OS::CreateEmptyFile(trace_filename)); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 360 | } else { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 361 | trace_file.reset(new File(trace_fd, "tracefile")); |
Elliott Hughes | 7616005 | 2012-12-12 16:31:20 -0800 | [diff] [blame] | 362 | trace_file->DisableAutoClose(); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 363 | } |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 364 | if (trace_file.get() == nullptr) { |
jeffhao | b5e8185 | 2012-03-12 11:15:45 -0700 | [diff] [blame] | 365 | PLOG(ERROR) << "Unable to open trace file '" << trace_filename << "'"; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 366 | ScopedObjectAccess soa(self); |
| 367 | ThrowRuntimeException("Unable to open trace file '%s'", trace_filename); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 368 | return; |
| 369 | } |
| 370 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 371 | |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 372 | Runtime* runtime = Runtime::Current(); |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 373 | |
| 374 | // Enable count of allocs if specified in the flags. |
| 375 | bool enable_stats = false; |
| 376 | |
Mathieu Chartier | bf9fc58 | 2015-03-13 17:21:25 -0700 | [diff] [blame] | 377 | runtime->GetThreadList()->SuspendAll(__FUNCTION__); |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 378 | |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 379 | // Create Trace object. |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 380 | { |
| 381 | MutexLock mu(self, *Locks::trace_lock_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 382 | if (the_trace_ != nullptr) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 383 | LOG(ERROR) << "Trace already in progress, ignoring this request"; |
| 384 | } else { |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 385 | enable_stats = (flags && kTraceCountAllocs) != 0; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 386 | the_trace_ = new Trace(trace_file.release(), trace_filename, buffer_size, flags, output_mode, |
| 387 | trace_mode); |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 388 | if (trace_mode == TraceMode::kSampling) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 389 | CHECK_PTHREAD_CALL(pthread_create, (&sampling_pthread_, nullptr, &RunSamplingThread, |
Jeff Hao | 23009dc | 2013-08-22 15:36:42 -0700 | [diff] [blame] | 390 | reinterpret_cast<void*>(interval_us)), |
| 391 | "Sampling profiler thread"); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 392 | the_trace_->interval_us_ = interval_us; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 393 | } else { |
| 394 | runtime->GetInstrumentation()->AddListener(the_trace_, |
| 395 | instrumentation::Instrumentation::kMethodEntered | |
| 396 | instrumentation::Instrumentation::kMethodExited | |
| 397 | instrumentation::Instrumentation::kMethodUnwind); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 398 | // TODO: In full-PIC mode, we don't need to fully deopt. |
Sebastien Hertz | 0462c4c | 2015-04-01 16:34:17 +0200 | [diff] [blame^] | 399 | runtime->GetInstrumentation()->EnableMethodTracing(kTracerInstrumentationKey); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 400 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 401 | } |
jeffhao | 0791adc | 2012-04-04 11:14:32 -0700 | [diff] [blame] | 402 | } |
Jeff Hao | d063d91 | 2014-09-08 09:38:18 -0700 | [diff] [blame] | 403 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 404 | runtime->GetThreadList()->ResumeAll(); |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 405 | |
| 406 | // Can't call this when holding the mutator lock. |
| 407 | if (enable_stats) { |
| 408 | runtime->SetStatsEnabled(true); |
| 409 | } |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 410 | } |
| 411 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 412 | void Trace::StopTracing(bool finish_tracing, bool flush_file) { |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 413 | bool stop_alloc_counting = false; |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 414 | Runtime* const runtime = Runtime::Current(); |
| 415 | Trace* the_trace = nullptr; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 416 | pthread_t sampling_pthread = 0U; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 417 | { |
| 418 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 419 | if (the_trace_ == nullptr) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 420 | LOG(ERROR) << "Trace stop requested, but no trace currently running"; |
| 421 | } else { |
| 422 | the_trace = the_trace_; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 423 | the_trace_ = nullptr; |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 424 | sampling_pthread = sampling_pthread_; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 425 | } |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 426 | } |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 427 | // Make sure that we join before we delete the trace since we don't want to have |
| 428 | // the sampling thread access a stale pointer. This finishes since the sampling thread exits when |
| 429 | // the_trace_ is null. |
| 430 | if (sampling_pthread != 0U) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 431 | CHECK_PTHREAD_CALL(pthread_join, (sampling_pthread, nullptr), "sampling thread shutdown"); |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 432 | sampling_pthread_ = 0U; |
| 433 | } |
Mathieu Chartier | bf9fc58 | 2015-03-13 17:21:25 -0700 | [diff] [blame] | 434 | runtime->GetThreadList()->SuspendAll(__FUNCTION__); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 435 | |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 436 | if (the_trace != nullptr) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 437 | stop_alloc_counting = (the_trace->flags_ & Trace::kTraceCountAllocs) != 0; |
| 438 | if (finish_tracing) { |
| 439 | the_trace->FinishTracing(); |
| 440 | } |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 441 | |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 442 | if (the_trace->trace_mode_ == TraceMode::kSampling) { |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 443 | MutexLock mu(Thread::Current(), *Locks::thread_list_lock_); |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 444 | runtime->GetThreadList()->ForEach(ClearThreadStackTraceAndClockBase, nullptr); |
Jeff Hao | 5ce4b17 | 2013-08-16 16:27:18 -0700 | [diff] [blame] | 445 | } else { |
Sebastien Hertz | 0462c4c | 2015-04-01 16:34:17 +0200 | [diff] [blame^] | 446 | runtime->GetInstrumentation()->DisableMethodTracing(kTracerInstrumentationKey); |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 447 | runtime->GetInstrumentation()->RemoveListener( |
| 448 | the_trace, instrumentation::Instrumentation::kMethodEntered | |
| 449 | instrumentation::Instrumentation::kMethodExited | |
| 450 | instrumentation::Instrumentation::kMethodUnwind); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 451 | } |
Andreas Gampe | 4303ba9 | 2014-11-06 01:00:46 -0800 | [diff] [blame] | 452 | if (the_trace->trace_file_.get() != nullptr) { |
| 453 | // Do not try to erase, so flush and close explicitly. |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 454 | if (flush_file) { |
| 455 | if (the_trace->trace_file_->Flush() != 0) { |
| 456 | PLOG(ERROR) << "Could not flush trace file."; |
| 457 | } |
| 458 | } else { |
| 459 | the_trace->trace_file_->MarkUnchecked(); // Do not trigger guard. |
Andreas Gampe | 4303ba9 | 2014-11-06 01:00:46 -0800 | [diff] [blame] | 460 | } |
| 461 | if (the_trace->trace_file_->Close() != 0) { |
| 462 | PLOG(ERROR) << "Could not close trace file."; |
| 463 | } |
| 464 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 465 | delete the_trace; |
| 466 | } |
| 467 | runtime->GetThreadList()->ResumeAll(); |
Mathieu Chartier | 9ef78b5 | 2014-09-25 17:03:12 -0700 | [diff] [blame] | 468 | if (stop_alloc_counting) { |
| 469 | // Can be racy since SetStatsEnabled is not guarded by any locks. |
Mathieu Chartier | 02e5f16 | 2015-03-11 09:54:22 -0700 | [diff] [blame] | 470 | runtime->SetStatsEnabled(false); |
Jeff Hao | 0abc72e | 2013-08-13 13:45:14 -0700 | [diff] [blame] | 471 | } |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 472 | } |
| 473 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 474 | void Trace::Abort() { |
| 475 | // Do not write anything anymore. |
| 476 | StopTracing(false, false); |
| 477 | } |
| 478 | |
| 479 | void Trace::Stop() { |
| 480 | // Finish writing. |
| 481 | StopTracing(true, true); |
| 482 | } |
| 483 | |
jeffhao | b5e8185 | 2012-03-12 11:15:45 -0700 | [diff] [blame] | 484 | void Trace::Shutdown() { |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 485 | if (GetMethodTracingMode() != kTracingInactive) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 486 | Stop(); |
jeffhao | b5e8185 | 2012-03-12 11:15:45 -0700 | [diff] [blame] | 487 | } |
jeffhao | b5e8185 | 2012-03-12 11:15:45 -0700 | [diff] [blame] | 488 | } |
| 489 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 490 | void Trace::Pause() { |
| 491 | bool stop_alloc_counting = false; |
| 492 | Runtime* runtime = Runtime::Current(); |
| 493 | Trace* the_trace = nullptr; |
| 494 | |
| 495 | pthread_t sampling_pthread = 0U; |
| 496 | { |
| 497 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 498 | if (the_trace_ == nullptr) { |
| 499 | LOG(ERROR) << "Trace pause requested, but no trace currently running"; |
| 500 | return; |
| 501 | } else { |
| 502 | the_trace = the_trace_; |
| 503 | sampling_pthread = sampling_pthread_; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | if (sampling_pthread != 0U) { |
| 508 | { |
| 509 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 510 | the_trace_ = nullptr; |
| 511 | } |
| 512 | CHECK_PTHREAD_CALL(pthread_join, (sampling_pthread, nullptr), "sampling thread shutdown"); |
| 513 | sampling_pthread_ = 0U; |
| 514 | { |
| 515 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 516 | the_trace_ = the_trace; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | if (the_trace != nullptr) { |
| 521 | runtime->GetThreadList()->SuspendAll(__FUNCTION__); |
| 522 | stop_alloc_counting = (the_trace->flags_ & Trace::kTraceCountAllocs) != 0; |
| 523 | |
| 524 | if (the_trace->trace_mode_ == TraceMode::kSampling) { |
| 525 | MutexLock mu(Thread::Current(), *Locks::thread_list_lock_); |
| 526 | runtime->GetThreadList()->ForEach(ClearThreadStackTraceAndClockBase, nullptr); |
| 527 | } else { |
Sebastien Hertz | 0462c4c | 2015-04-01 16:34:17 +0200 | [diff] [blame^] | 528 | runtime->GetInstrumentation()->DisableMethodTracing(kTracerInstrumentationKey); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 529 | runtime->GetInstrumentation()->RemoveListener(the_trace, |
| 530 | instrumentation::Instrumentation::kMethodEntered | |
| 531 | instrumentation::Instrumentation::kMethodExited | |
| 532 | instrumentation::Instrumentation::kMethodUnwind); |
| 533 | } |
| 534 | runtime->GetThreadList()->ResumeAll(); |
| 535 | } |
| 536 | |
| 537 | if (stop_alloc_counting) { |
| 538 | // Can be racy since SetStatsEnabled is not guarded by any locks. |
| 539 | Runtime::Current()->SetStatsEnabled(false); |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | void Trace::Resume() { |
| 544 | Thread* self = Thread::Current(); |
| 545 | Trace* the_trace; |
| 546 | { |
| 547 | MutexLock mu(self, *Locks::trace_lock_); |
| 548 | if (the_trace_ == nullptr) { |
| 549 | LOG(ERROR) << "No trace to resume (or sampling mode), ignoring this request"; |
| 550 | return; |
| 551 | } |
| 552 | the_trace = the_trace_; |
| 553 | } |
| 554 | |
| 555 | Runtime* runtime = Runtime::Current(); |
| 556 | |
| 557 | // Enable count of allocs if specified in the flags. |
| 558 | bool enable_stats = (the_trace->flags_ && kTraceCountAllocs) != 0; |
| 559 | |
| 560 | runtime->GetThreadList()->SuspendAll(__FUNCTION__); |
| 561 | |
| 562 | // Reenable. |
| 563 | if (the_trace->trace_mode_ == TraceMode::kSampling) { |
| 564 | CHECK_PTHREAD_CALL(pthread_create, (&sampling_pthread_, nullptr, &RunSamplingThread, |
| 565 | reinterpret_cast<void*>(the_trace->interval_us_)), "Sampling profiler thread"); |
| 566 | } else { |
| 567 | runtime->GetInstrumentation()->AddListener(the_trace, |
| 568 | instrumentation::Instrumentation::kMethodEntered | |
| 569 | instrumentation::Instrumentation::kMethodExited | |
| 570 | instrumentation::Instrumentation::kMethodUnwind); |
| 571 | // TODO: In full-PIC mode, we don't need to fully deopt. |
Sebastien Hertz | 0462c4c | 2015-04-01 16:34:17 +0200 | [diff] [blame^] | 572 | runtime->GetInstrumentation()->EnableMethodTracing(kTracerInstrumentationKey); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | runtime->GetThreadList()->ResumeAll(); |
| 576 | |
| 577 | // Can't call this when holding the mutator lock. |
| 578 | if (enable_stats) { |
| 579 | runtime->SetStatsEnabled(true); |
| 580 | } |
| 581 | } |
| 582 | |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 583 | TracingMode Trace::GetMethodTracingMode() { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 584 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 585 | if (the_trace_ == nullptr) { |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 586 | return kTracingInactive; |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 587 | } else { |
Andreas Gampe | 7e7e0f4 | 2015-03-29 15:26:23 -0700 | [diff] [blame] | 588 | switch (the_trace_->trace_mode_) { |
| 589 | case TraceMode::kSampling: |
| 590 | return kSampleProfilingActive; |
| 591 | case TraceMode::kMethodTracing: |
| 592 | return kMethodTracingActive; |
| 593 | } |
| 594 | LOG(FATAL) << "Unreachable"; |
| 595 | UNREACHABLE(); |
Jeff Hao | 64caa7d | 2013-08-29 11:18:01 -0700 | [diff] [blame] | 596 | } |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 597 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 598 | |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 599 | static constexpr size_t kMinBufSize = 18U; // Trace header is up to 18B. |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 600 | |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 601 | Trace::Trace(File* trace_file, const char* trace_name, size_t buffer_size, int flags, |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 602 | TraceOutputMode output_mode, TraceMode trace_mode) |
| 603 | : trace_file_(trace_file), |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 604 | buf_(new uint8_t[std::max(kMinBufSize, buffer_size)]()), |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 605 | flags_(flags), trace_output_mode_(output_mode), trace_mode_(trace_mode), |
| 606 | clock_source_(default_clock_source_), |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 607 | buffer_size_(std::max(kMinBufSize, buffer_size)), |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 608 | start_time_(MicroTime()), clock_overhead_ns_(GetClockOverheadNanoSeconds()), cur_offset_(0), |
| 609 | overflow_(false), interval_us_(0), streaming_lock_(nullptr) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 610 | uint16_t trace_version = GetTraceVersion(clock_source_); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 611 | if (output_mode == TraceOutputMode::kStreaming) { |
| 612 | trace_version |= 0xF0U; |
| 613 | } |
| 614 | // Set up the beginning of the trace. |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 615 | memset(buf_.get(), 0, kTraceHeaderLength); |
| 616 | Append4LE(buf_.get(), kTraceMagicValue); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 617 | Append2LE(buf_.get() + 4, trace_version); |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 618 | Append2LE(buf_.get() + 6, kTraceHeaderLength); |
| 619 | Append8LE(buf_.get() + 8, start_time_); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 620 | if (trace_version >= kTraceVersionDualClock) { |
| 621 | uint16_t record_size = GetRecordSize(clock_source_); |
| 622 | Append2LE(buf_.get() + 16, record_size); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 623 | } |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 624 | static_assert(18 <= kMinBufSize, "Minimum buffer size not large enough for trace header"); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 625 | |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 626 | // Update current offset. |
Ian Rogers | 8ab25ef | 2014-07-09 18:00:50 -0700 | [diff] [blame] | 627 | cur_offset_.StoreRelaxed(kTraceHeaderLength); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 628 | |
| 629 | if (output_mode == TraceOutputMode::kStreaming) { |
| 630 | streaming_file_name_ = trace_name; |
| 631 | streaming_lock_ = new Mutex("tracing lock"); |
| 632 | seen_threads_.reset(new ThreadIDBitSet()); |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | Trace::~Trace() { |
| 637 | delete streaming_lock_; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 638 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 639 | |
Ian Rogers | e63db27 | 2014-07-15 15:36:11 -0700 | [diff] [blame] | 640 | static void DumpBuf(uint8_t* buf, size_t buf_size, TraceClockSource clock_source) |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 641 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 642 | uint8_t* ptr = buf + kTraceHeaderLength; |
| 643 | uint8_t* end = buf + buf_size; |
| 644 | |
| 645 | while (ptr < end) { |
| 646 | uint32_t tmid = ptr[2] | (ptr[3] << 8) | (ptr[4] << 16) | (ptr[5] << 24); |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 647 | mirror::ArtMethod* method = DecodeTraceMethodId(tmid); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 648 | TraceAction action = DecodeTraceAction(tmid); |
| 649 | LOG(INFO) << PrettyMethod(method) << " " << static_cast<int>(action); |
| 650 | ptr += GetRecordSize(clock_source); |
| 651 | } |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 652 | } |
| 653 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 654 | static void GetVisitedMethodsFromBitSets( |
| 655 | const std::map<mirror::DexCache*, DexIndexBitSet*>& seen_methods, |
| 656 | std::set<mirror::ArtMethod*>* visited_methods) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 657 | for (auto& e : seen_methods) { |
| 658 | DexIndexBitSet* bit_set = e.second; |
| 659 | for (uint32_t i = 0; i < bit_set->size(); ++i) { |
| 660 | if ((*bit_set)[i]) { |
| 661 | visited_methods->insert(e.first->GetResolvedMethod(i)); |
| 662 | } |
| 663 | } |
| 664 | } |
| 665 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 666 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 667 | void Trace::FinishTracing() { |
| 668 | size_t final_offset = 0; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 669 | |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 670 | std::set<mirror::ArtMethod*> visited_methods; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 671 | if (trace_output_mode_ == TraceOutputMode::kStreaming) { |
| 672 | // Write the secondary file with all the method names. |
| 673 | GetVisitedMethodsFromBitSets(seen_methods_, &visited_methods); |
| 674 | |
| 675 | // Clean up. |
| 676 | for (auto& e : seen_methods_) { |
| 677 | delete e.second; |
| 678 | } |
| 679 | } else { |
| 680 | final_offset = cur_offset_.LoadRelaxed(); |
| 681 | GetVisitedMethods(final_offset, &visited_methods); |
| 682 | } |
| 683 | |
| 684 | // Compute elapsed time. |
| 685 | uint64_t elapsed = MicroTime() - start_time_; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 686 | |
| 687 | std::ostringstream os; |
| 688 | |
| 689 | os << StringPrintf("%cversion\n", kTraceTokenChar); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 690 | os << StringPrintf("%d\n", GetTraceVersion(clock_source_)); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 691 | os << StringPrintf("data-file-overflow=%s\n", overflow_ ? "true" : "false"); |
| 692 | if (UseThreadCpuClock()) { |
| 693 | if (UseWallClock()) { |
| 694 | os << StringPrintf("clock=dual\n"); |
| 695 | } else { |
| 696 | os << StringPrintf("clock=thread-cpu\n"); |
| 697 | } |
| 698 | } else { |
| 699 | os << StringPrintf("clock=wall\n"); |
| 700 | } |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 701 | os << StringPrintf("elapsed-time-usec=%" PRIu64 "\n", elapsed); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 702 | if (trace_output_mode_ != TraceOutputMode::kStreaming) { |
| 703 | size_t num_records = (final_offset - kTraceHeaderLength) / GetRecordSize(clock_source_); |
| 704 | os << StringPrintf("num-method-calls=%zd\n", num_records); |
| 705 | } |
Jeff Hao | c5d824a | 2014-07-28 18:35:38 -0700 | [diff] [blame] | 706 | os << StringPrintf("clock-call-overhead-nsec=%d\n", clock_overhead_ns_); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 707 | os << StringPrintf("vm=art\n"); |
John Reck | 0624a27 | 2015-03-26 15:47:54 -0700 | [diff] [blame] | 708 | os << StringPrintf("pid=%d\n", getpid()); |
jeffhao | 0791adc | 2012-04-04 11:14:32 -0700 | [diff] [blame] | 709 | if ((flags_ & kTraceCountAllocs) != 0) { |
| 710 | os << StringPrintf("alloc-count=%d\n", Runtime::Current()->GetStat(KIND_ALLOCATED_OBJECTS)); |
| 711 | os << StringPrintf("alloc-size=%d\n", Runtime::Current()->GetStat(KIND_ALLOCATED_BYTES)); |
| 712 | os << StringPrintf("gc-count=%d\n", Runtime::Current()->GetStat(KIND_GC_INVOCATIONS)); |
| 713 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 714 | os << StringPrintf("%cthreads\n", kTraceTokenChar); |
| 715 | DumpThreadList(os); |
| 716 | os << StringPrintf("%cmethods\n", kTraceTokenChar); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 717 | DumpMethodList(os, visited_methods); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 718 | os << StringPrintf("%cend\n", kTraceTokenChar); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 719 | std::string header(os.str()); |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 720 | |
| 721 | if (trace_output_mode_ == TraceOutputMode::kStreaming) { |
| 722 | File file; |
| 723 | if (!file.Open(streaming_file_name_ + ".sec", O_CREAT | O_WRONLY)) { |
| 724 | LOG(WARNING) << "Could not open secondary trace file!"; |
| 725 | return; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 726 | } |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 727 | if (!file.WriteFully(header.c_str(), header.length())) { |
| 728 | file.Erase(); |
Elliott Hughes | 7b9d996 | 2012-04-20 18:48:18 -0700 | [diff] [blame] | 729 | std::string detail(StringPrintf("Trace data write failed: %s", strerror(errno))); |
| 730 | PLOG(ERROR) << detail; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 731 | ThrowRuntimeException("%s", detail.c_str()); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 732 | } |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 733 | if (file.FlushCloseOrErase() != 0) { |
| 734 | PLOG(ERROR) << "Could not write secondary file"; |
| 735 | } |
| 736 | } else { |
| 737 | if (trace_file_.get() == nullptr) { |
| 738 | iovec iov[2]; |
| 739 | iov[0].iov_base = reinterpret_cast<void*>(const_cast<char*>(header.c_str())); |
| 740 | iov[0].iov_len = header.length(); |
| 741 | iov[1].iov_base = buf_.get(); |
| 742 | iov[1].iov_len = final_offset; |
| 743 | Dbg::DdmSendChunkV(CHUNK_TYPE("MPSE"), iov, 2); |
| 744 | const bool kDumpTraceInfo = false; |
| 745 | if (kDumpTraceInfo) { |
| 746 | LOG(INFO) << "Trace sent:\n" << header; |
| 747 | DumpBuf(buf_.get(), final_offset, clock_source_); |
| 748 | } |
| 749 | } else { |
| 750 | if (!trace_file_->WriteFully(header.c_str(), header.length()) || |
| 751 | !trace_file_->WriteFully(buf_.get(), final_offset)) { |
| 752 | std::string detail(StringPrintf("Trace data write failed: %s", strerror(errno))); |
| 753 | PLOG(ERROR) << detail; |
| 754 | ThrowRuntimeException("%s", detail.c_str()); |
| 755 | } |
| 756 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 757 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 758 | } |
| 759 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 760 | void Trace::DexPcMoved(Thread* thread, mirror::Object* this_object, |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 761 | mirror::ArtMethod* method, uint32_t new_dex_pc) { |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 762 | UNUSED(thread, this_object, method, new_dex_pc); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 763 | // We're not recorded to listen to this kind of event, so complain. |
| 764 | LOG(ERROR) << "Unexpected dex PC event in tracing " << PrettyMethod(method) << " " << new_dex_pc; |
Andreas Gampe | c8ccf68 | 2014-09-29 20:07:43 -0700 | [diff] [blame] | 765 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 766 | |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 767 | void Trace::FieldRead(Thread* thread, mirror::Object* this_object, |
Mathieu Chartier | c785344 | 2015-03-27 14:35:38 -0700 | [diff] [blame] | 768 | mirror::ArtMethod* method, uint32_t dex_pc, ArtField* field) |
Sebastien Hertz | 3f52eaf | 2014-04-04 17:50:18 +0200 | [diff] [blame] | 769 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 770 | UNUSED(thread, this_object, method, dex_pc, field); |
Sebastien Hertz | 3f52eaf | 2014-04-04 17:50:18 +0200 | [diff] [blame] | 771 | // We're not recorded to listen to this kind of event, so complain. |
| 772 | LOG(ERROR) << "Unexpected field read event in tracing " << PrettyMethod(method) << " " << dex_pc; |
| 773 | } |
| 774 | |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 775 | void Trace::FieldWritten(Thread* thread, mirror::Object* this_object, |
Mathieu Chartier | c785344 | 2015-03-27 14:35:38 -0700 | [diff] [blame] | 776 | mirror::ArtMethod* method, uint32_t dex_pc, ArtField* field, |
Sebastien Hertz | 3f52eaf | 2014-04-04 17:50:18 +0200 | [diff] [blame] | 777 | const JValue& field_value) |
| 778 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 779 | UNUSED(thread, this_object, method, dex_pc, field, field_value); |
Sebastien Hertz | 3f52eaf | 2014-04-04 17:50:18 +0200 | [diff] [blame] | 780 | // We're not recorded to listen to this kind of event, so complain. |
| 781 | LOG(ERROR) << "Unexpected field write event in tracing " << PrettyMethod(method) << " " << dex_pc; |
| 782 | } |
| 783 | |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 784 | void Trace::MethodEntered(Thread* thread, mirror::Object* this_object ATTRIBUTE_UNUSED, |
| 785 | mirror::ArtMethod* method, uint32_t dex_pc ATTRIBUTE_UNUSED) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 786 | uint32_t thread_clock_diff = 0; |
| 787 | uint32_t wall_clock_diff = 0; |
| 788 | ReadClocks(thread, &thread_clock_diff, &wall_clock_diff); |
| 789 | LogMethodTraceEvent(thread, method, instrumentation::Instrumentation::kMethodEntered, |
| 790 | thread_clock_diff, wall_clock_diff); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 791 | } |
| 792 | |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 793 | void Trace::MethodExited(Thread* thread, mirror::Object* this_object ATTRIBUTE_UNUSED, |
| 794 | mirror::ArtMethod* method, uint32_t dex_pc ATTRIBUTE_UNUSED, |
| 795 | const JValue& return_value ATTRIBUTE_UNUSED) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 796 | uint32_t thread_clock_diff = 0; |
| 797 | uint32_t wall_clock_diff = 0; |
| 798 | ReadClocks(thread, &thread_clock_diff, &wall_clock_diff); |
| 799 | LogMethodTraceEvent(thread, method, instrumentation::Instrumentation::kMethodExited, |
| 800 | thread_clock_diff, wall_clock_diff); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 801 | } |
| 802 | |
Ian Rogers | 6a3c1fc | 2014-10-31 00:33:20 -0700 | [diff] [blame] | 803 | void Trace::MethodUnwind(Thread* thread, mirror::Object* this_object ATTRIBUTE_UNUSED, |
| 804 | mirror::ArtMethod* method, uint32_t dex_pc ATTRIBUTE_UNUSED) { |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 805 | uint32_t thread_clock_diff = 0; |
| 806 | uint32_t wall_clock_diff = 0; |
| 807 | ReadClocks(thread, &thread_clock_diff, &wall_clock_diff); |
| 808 | LogMethodTraceEvent(thread, method, instrumentation::Instrumentation::kMethodUnwind, |
| 809 | thread_clock_diff, wall_clock_diff); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 810 | } |
| 811 | |
Nicolas Geoffray | 14691c5 | 2015-03-05 10:40:17 +0000 | [diff] [blame] | 812 | void Trace::ExceptionCaught(Thread* thread, mirror::Throwable* exception_object) |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 813 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Nicolas Geoffray | 14691c5 | 2015-03-05 10:40:17 +0000 | [diff] [blame] | 814 | UNUSED(thread, exception_object); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 815 | LOG(ERROR) << "Unexpected exception caught event in tracing"; |
| 816 | } |
| 817 | |
Mathieu Chartier | e5f13e5 | 2015-02-24 09:37:21 -0800 | [diff] [blame] | 818 | void Trace::BackwardBranch(Thread* /*thread*/, mirror::ArtMethod* method, |
| 819 | int32_t /*dex_pc_offset*/) |
| 820 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 821 | LOG(ERROR) << "Unexpected backward branch event in tracing" << PrettyMethod(method); |
| 822 | } |
| 823 | |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 824 | void Trace::ReadClocks(Thread* thread, uint32_t* thread_clock_diff, uint32_t* wall_clock_diff) { |
| 825 | if (UseThreadCpuClock()) { |
| 826 | uint64_t clock_base = thread->GetTraceClockBase(); |
| 827 | if (UNLIKELY(clock_base == 0)) { |
| 828 | // First event, record the base time in the map. |
| 829 | uint64_t time = thread->GetCpuMicroTime(); |
| 830 | thread->SetTraceClockBase(time); |
| 831 | } else { |
| 832 | *thread_clock_diff = thread->GetCpuMicroTime() - clock_base; |
| 833 | } |
| 834 | } |
| 835 | if (UseWallClock()) { |
| 836 | *wall_clock_diff = MicroTime() - start_time_; |
| 837 | } |
| 838 | } |
| 839 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 840 | bool Trace::RegisterMethod(mirror::ArtMethod* method) { |
| 841 | mirror::DexCache* dex_cache = method->GetDexCache(); |
| 842 | if (dex_cache->GetResolvedMethod(method->GetDexMethodIndex()) != method) { |
| 843 | DCHECK(dex_cache->GetResolvedMethod(method->GetDexMethodIndex()) == nullptr); |
| 844 | dex_cache->SetResolvedMethod(method->GetDexMethodIndex(), method); |
| 845 | } |
| 846 | if (seen_methods_.find(dex_cache) == seen_methods_.end()) { |
| 847 | seen_methods_.insert(std::make_pair(dex_cache, new DexIndexBitSet())); |
| 848 | } |
| 849 | DexIndexBitSet* bit_set = seen_methods_.find(dex_cache)->second; |
| 850 | if (!(*bit_set)[method->GetDexMethodIndex()]) { |
| 851 | bit_set->set(method->GetDexMethodIndex()); |
| 852 | return true; |
| 853 | } |
| 854 | return false; |
| 855 | } |
| 856 | |
| 857 | bool Trace::RegisterThread(Thread* thread) { |
| 858 | pid_t tid = thread->GetTid(); |
| 859 | CHECK_LT(0U, static_cast<uint32_t>(tid)); |
| 860 | CHECK_LT(static_cast<uint32_t>(tid), 65536U); |
| 861 | |
| 862 | if (!(*seen_threads_)[tid]) { |
| 863 | seen_threads_->set(tid); |
| 864 | return true; |
| 865 | } |
| 866 | return false; |
| 867 | } |
| 868 | |
| 869 | static std::string GetMethodLine(mirror::ArtMethod* method) |
| 870 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 871 | return StringPrintf("%p\t%s\t%s\t%s\t%s\n", method, |
| 872 | PrettyDescriptor(method->GetDeclaringClassDescriptor()).c_str(), method->GetName(), |
| 873 | method->GetSignature().ToString().c_str(), method->GetDeclaringClassSourceFile()); |
| 874 | } |
| 875 | |
| 876 | void Trace::WriteToBuf(const uint8_t* src, size_t src_size) { |
| 877 | int32_t old_offset = cur_offset_.LoadRelaxed(); |
| 878 | int32_t new_offset = old_offset + static_cast<int32_t>(src_size); |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 879 | if (dchecked_integral_cast<size_t>(new_offset) > buffer_size_) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 880 | // Flush buffer. |
| 881 | if (!trace_file_->WriteFully(buf_.get(), old_offset)) { |
| 882 | PLOG(WARNING) << "Failed streaming a tracing event."; |
| 883 | } |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 884 | |
| 885 | // Check whether the data is too large for the buffer, then write immediately. |
| 886 | if (src_size >= buffer_size_) { |
| 887 | if (!trace_file_->WriteFully(src, src_size)) { |
| 888 | PLOG(WARNING) << "Failed streaming a tracing event."; |
| 889 | } |
| 890 | cur_offset_.StoreRelease(0); // Buffer is empty now. |
| 891 | return; |
| 892 | } |
| 893 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 894 | old_offset = 0; |
| 895 | new_offset = static_cast<int32_t>(src_size); |
| 896 | } |
| 897 | cur_offset_.StoreRelease(new_offset); |
| 898 | // Fill in data. |
| 899 | memcpy(buf_.get() + old_offset, src, src_size); |
| 900 | } |
| 901 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 902 | void Trace::LogMethodTraceEvent(Thread* thread, mirror::ArtMethod* method, |
Jeff Hao | c1ff4b7 | 2013-08-19 11:33:10 -0700 | [diff] [blame] | 903 | instrumentation::Instrumentation::InstrumentationEvent event, |
| 904 | uint32_t thread_clock_diff, uint32_t wall_clock_diff) { |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 905 | // Advance cur_offset_ atomically. |
| 906 | int32_t new_offset; |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 907 | int32_t old_offset = 0; |
| 908 | |
| 909 | // We do a busy loop here trying to acquire the next offset. |
| 910 | if (trace_output_mode_ != TraceOutputMode::kStreaming) { |
| 911 | do { |
| 912 | old_offset = cur_offset_.LoadRelaxed(); |
| 913 | new_offset = old_offset + GetRecordSize(clock_source_); |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 914 | if (static_cast<size_t>(new_offset) > buffer_size_) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 915 | overflow_ = true; |
| 916 | return; |
| 917 | } |
| 918 | } while (!cur_offset_.CompareExchangeWeakSequentiallyConsistent(old_offset, new_offset)); |
| 919 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 920 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 921 | TraceAction action = kTraceMethodEnter; |
| 922 | switch (event) { |
| 923 | case instrumentation::Instrumentation::kMethodEntered: |
| 924 | action = kTraceMethodEnter; |
| 925 | break; |
| 926 | case instrumentation::Instrumentation::kMethodExited: |
| 927 | action = kTraceMethodExit; |
| 928 | break; |
| 929 | case instrumentation::Instrumentation::kMethodUnwind: |
| 930 | action = kTraceUnroll; |
| 931 | break; |
| 932 | default: |
| 933 | UNIMPLEMENTED(FATAL) << "Unexpected event: " << event; |
| 934 | } |
| 935 | |
| 936 | uint32_t method_value = EncodeTraceMethodAndAction(method, action); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 937 | |
| 938 | // Write data |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 939 | uint8_t* ptr; |
| 940 | static constexpr size_t kPacketSize = 14U; // The maximum size of data in a packet. |
| 941 | uint8_t stack_buf[kPacketSize]; // Space to store a packet when in streaming mode. |
| 942 | if (trace_output_mode_ == TraceOutputMode::kStreaming) { |
| 943 | ptr = stack_buf; |
| 944 | } else { |
| 945 | ptr = buf_.get() + old_offset; |
| 946 | } |
| 947 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 948 | Append2LE(ptr, thread->GetTid()); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 949 | Append4LE(ptr + 2, method_value); |
| 950 | ptr += 6; |
| 951 | |
| 952 | if (UseThreadCpuClock()) { |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 953 | Append4LE(ptr, thread_clock_diff); |
| 954 | ptr += 4; |
| 955 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 956 | if (UseWallClock()) { |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 957 | Append4LE(ptr, wall_clock_diff); |
| 958 | } |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 959 | static_assert(kPacketSize == 2 + 4 + 4 + 4, "Packet size incorrect."); |
| 960 | |
| 961 | if (trace_output_mode_ == TraceOutputMode::kStreaming) { |
| 962 | MutexLock mu(Thread::Current(), *streaming_lock_); // To serialize writing. |
| 963 | if (RegisterMethod(method)) { |
| 964 | // Write a special block with the name. |
| 965 | std::string method_line(GetMethodLine(method)); |
| 966 | uint8_t buf2[5]; |
| 967 | Append2LE(buf2, 0); |
| 968 | buf2[2] = kOpNewMethod; |
| 969 | Append2LE(buf2 + 3, static_cast<uint16_t>(method_line.length())); |
| 970 | WriteToBuf(buf2, sizeof(buf2)); |
| 971 | WriteToBuf(reinterpret_cast<const uint8_t*>(method_line.c_str()), method_line.length()); |
| 972 | } |
| 973 | if (RegisterThread(thread)) { |
| 974 | // It might be better to postpone this. Threads might not have received names... |
| 975 | std::string thread_name; |
| 976 | thread->GetThreadName(thread_name); |
| 977 | uint8_t buf2[7]; |
| 978 | Append2LE(buf2, 0); |
| 979 | buf2[2] = kOpNewThread; |
| 980 | Append2LE(buf2 + 3, static_cast<uint16_t>(thread->GetTid())); |
| 981 | Append2LE(buf2 + 5, static_cast<uint16_t>(thread_name.length())); |
| 982 | WriteToBuf(buf2, sizeof(buf2)); |
| 983 | WriteToBuf(reinterpret_cast<const uint8_t*>(thread_name.c_str()), thread_name.length()); |
| 984 | } |
| 985 | WriteToBuf(stack_buf, sizeof(stack_buf)); |
| 986 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 987 | } |
| 988 | |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 989 | void Trace::GetVisitedMethods(size_t buf_size, |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 990 | std::set<mirror::ArtMethod*>* visited_methods) { |
jeffhao | 2692b57 | 2011-12-16 15:42:28 -0800 | [diff] [blame] | 991 | uint8_t* ptr = buf_.get() + kTraceHeaderLength; |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 992 | uint8_t* end = buf_.get() + buf_size; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 993 | |
| 994 | while (ptr < end) { |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 995 | uint32_t tmid = ptr[2] | (ptr[3] << 8) | (ptr[4] << 16) | (ptr[5] << 24); |
Brian Carlstrom | ea46f95 | 2013-07-30 01:26:50 -0700 | [diff] [blame] | 996 | mirror::ArtMethod* method = DecodeTraceMethodId(tmid); |
Ian Rogers | 62d6c77 | 2013-02-27 08:32:07 -0800 | [diff] [blame] | 997 | visited_methods->insert(method); |
| 998 | ptr += GetRecordSize(clock_source_); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 999 | } |
| 1000 | } |
| 1001 | |
Mathieu Chartier | 02e2511 | 2013-08-14 16:14:24 -0700 | [diff] [blame] | 1002 | void Trace::DumpMethodList(std::ostream& os, const std::set<mirror::ArtMethod*>& visited_methods) { |
Mathieu Chartier | 02e2511 | 2013-08-14 16:14:24 -0700 | [diff] [blame] | 1003 | for (const auto& method : visited_methods) { |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 1004 | os << GetMethodLine(method); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 1005 | } |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 1006 | } |
| 1007 | |
| 1008 | static void DumpThread(Thread* t, void* arg) { |
Elliott Hughes | ffb465f | 2012-03-01 18:46:05 -0800 | [diff] [blame] | 1009 | std::ostream& os = *reinterpret_cast<std::ostream*>(arg); |
| 1010 | std::string name; |
| 1011 | t->GetThreadName(name); |
| 1012 | os << t->GetTid() << "\t" << name << "\n"; |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 1013 | } |
| 1014 | |
| 1015 | void Trace::DumpThreadList(std::ostream& os) { |
Ian Rogers | 81d425b | 2012-09-27 16:03:43 -0700 | [diff] [blame] | 1016 | Thread* self = Thread::Current(); |
Jeff Hao | e094b87 | 2014-10-14 13:12:01 -0700 | [diff] [blame] | 1017 | for (auto it : exited_threads_) { |
| 1018 | os << it.first << "\t" << it.second << "\n"; |
| 1019 | } |
Ian Rogers | 81d425b | 2012-09-27 16:03:43 -0700 | [diff] [blame] | 1020 | Locks::thread_list_lock_->AssertNotHeld(self); |
| 1021 | MutexLock mu(self, *Locks::thread_list_lock_); |
jeffhao | a9ef3fd | 2011-12-13 18:33:43 -0800 | [diff] [blame] | 1022 | Runtime::Current()->GetThreadList()->ForEach(DumpThread, &os); |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 1023 | } |
| 1024 | |
Jeff Hao | e094b87 | 2014-10-14 13:12:01 -0700 | [diff] [blame] | 1025 | void Trace::StoreExitingThreadInfo(Thread* thread) { |
| 1026 | MutexLock mu(thread, *Locks::trace_lock_); |
| 1027 | if (the_trace_ != nullptr) { |
| 1028 | std::string name; |
| 1029 | thread->GetThreadName(name); |
Andreas Gampe | a1785c5 | 2014-11-25 20:40:08 -0800 | [diff] [blame] | 1030 | // The same thread/tid may be used multiple times. As SafeMap::Put does not allow to override |
| 1031 | // a previous mapping, use SafeMap::Overwrite. |
| 1032 | the_trace_->exited_threads_.Overwrite(thread->GetTid(), name); |
Jeff Hao | e094b87 | 2014-10-14 13:12:01 -0700 | [diff] [blame] | 1033 | } |
| 1034 | } |
| 1035 | |
Andreas Gampe | 40da286 | 2015-02-27 12:49:04 -0800 | [diff] [blame] | 1036 | Trace::TraceOutputMode Trace::GetOutputMode() { |
| 1037 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 1038 | CHECK(the_trace_ != nullptr) << "Trace output mode requested, but no trace currently running"; |
| 1039 | return the_trace_->trace_output_mode_; |
| 1040 | } |
| 1041 | |
| 1042 | Trace::TraceMode Trace::GetMode() { |
| 1043 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 1044 | CHECK(the_trace_ != nullptr) << "Trace mode requested, but no trace currently running"; |
| 1045 | return the_trace_->trace_mode_; |
| 1046 | } |
| 1047 | |
Andreas Gampe | e34a42c | 2015-04-25 14:44:29 -0700 | [diff] [blame] | 1048 | size_t Trace::GetBufferSize() { |
| 1049 | MutexLock mu(Thread::Current(), *Locks::trace_lock_); |
| 1050 | CHECK(the_trace_ != nullptr) << "Trace mode requested, but no trace currently running"; |
| 1051 | return the_trace_->buffer_size_; |
| 1052 | } |
| 1053 | |
jeffhao | e343b76 | 2011-12-05 16:36:44 -0800 | [diff] [blame] | 1054 | } // namespace art |