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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "base/trace_event/trace_buffer.h" | 5 #include "base/trace_event/trace_buffer.h" |
| 6 | 6 |
| 7 #include <utility> | 7 #include <utility> |
| 8 #include <vector> | 8 #include <vector> |
| 9 | 9 |
| 10 #include "base/macros.h" |
| 10 #include "base/memory/scoped_ptr.h" | 11 #include "base/memory/scoped_ptr.h" |
| 11 #include "base/trace_event/trace_event_impl.h" | 12 #include "base/trace_event/trace_event_impl.h" |
| 12 | 13 |
| 13 namespace base { | 14 namespace base { |
| 14 namespace trace_event { | 15 namespace trace_event { |
| 15 | 16 |
| 16 namespace { | 17 namespace { |
| 17 | 18 |
| 18 class TraceBufferRingBuffer : public TraceBuffer { | 19 class TraceBufferRingBuffer : public TraceBuffer { |
| 19 public: | 20 public: |
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| 184 } | 185 } |
| 185 | 186 |
| 186 size_t max_chunks_; | 187 size_t max_chunks_; |
| 187 std::vector<scoped_ptr<TraceBufferChunk>> chunks_; | 188 std::vector<scoped_ptr<TraceBufferChunk>> chunks_; |
| 188 | 189 |
| 189 scoped_ptr<size_t[]> recyclable_chunks_queue_; | 190 scoped_ptr<size_t[]> recyclable_chunks_queue_; |
| 190 size_t queue_head_; | 191 size_t queue_head_; |
| 191 size_t queue_tail_; | 192 size_t queue_tail_; |
| 192 | 193 |
| 193 size_t current_iteration_index_; | 194 size_t current_iteration_index_; |
| 194 uint32 current_chunk_seq_; | 195 uint32_t current_chunk_seq_; |
| 195 | 196 |
| 196 DISALLOW_COPY_AND_ASSIGN(TraceBufferRingBuffer); | 197 DISALLOW_COPY_AND_ASSIGN(TraceBufferRingBuffer); |
| 197 }; | 198 }; |
| 198 | 199 |
| 199 class TraceBufferVector : public TraceBuffer { | 200 class TraceBufferVector : public TraceBuffer { |
| 200 public: | 201 public: |
| 201 TraceBufferVector(size_t max_chunks) | 202 TraceBufferVector(size_t max_chunks) |
| 202 : in_flight_chunk_count_(0), | 203 : in_flight_chunk_count_(0), |
| 203 current_iteration_index_(0), | 204 current_iteration_index_(0), |
| 204 max_chunks_(max_chunks) { | 205 max_chunks_(max_chunks) { |
| 205 chunks_.reserve(max_chunks_); | 206 chunks_.reserve(max_chunks_); |
| 206 } | 207 } |
| 207 | 208 |
| 208 scoped_ptr<TraceBufferChunk> GetChunk(size_t* index) override { | 209 scoped_ptr<TraceBufferChunk> GetChunk(size_t* index) override { |
| 209 // This function may be called when adding normal events or indirectly from | 210 // This function may be called when adding normal events or indirectly from |
| 210 // AddMetadataEventsWhileLocked(). We can not DECHECK(!IsFull()) because we | 211 // AddMetadataEventsWhileLocked(). We can not DECHECK(!IsFull()) because we |
| 211 // have to add the metadata events and flush thread-local buffers even if | 212 // have to add the metadata events and flush thread-local buffers even if |
| 212 // the buffer is full. | 213 // the buffer is full. |
| 213 *index = chunks_.size(); | 214 *index = chunks_.size(); |
| 214 chunks_.push_back(NULL); // Put NULL in the slot of a in-flight chunk. | 215 chunks_.push_back(NULL); // Put NULL in the slot of a in-flight chunk. |
| 215 ++in_flight_chunk_count_; | 216 ++in_flight_chunk_count_; |
| 216 // + 1 because zero chunk_seq is not allowed. | 217 // + 1 because zero chunk_seq is not allowed. |
| 217 return scoped_ptr<TraceBufferChunk>( | 218 return scoped_ptr<TraceBufferChunk>( |
| 218 new TraceBufferChunk(static_cast<uint32>(*index) + 1)); | 219 new TraceBufferChunk(static_cast<uint32_t>(*index) + 1)); |
| 219 } | 220 } |
| 220 | 221 |
| 221 void ReturnChunk(size_t index, scoped_ptr<TraceBufferChunk> chunk) override { | 222 void ReturnChunk(size_t index, scoped_ptr<TraceBufferChunk> chunk) override { |
| 222 DCHECK_GT(in_flight_chunk_count_, 0u); | 223 DCHECK_GT(in_flight_chunk_count_, 0u); |
| 223 DCHECK_LT(index, chunks_.size()); | 224 DCHECK_LT(index, chunks_.size()); |
| 224 DCHECK(!chunks_[index]); | 225 DCHECK(!chunks_[index]); |
| 225 --in_flight_chunk_count_; | 226 --in_flight_chunk_count_; |
| 226 chunks_[index] = chunk.release(); | 227 chunks_[index] = chunk.release(); |
| 227 } | 228 } |
| 228 | 229 |
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| 282 size_t in_flight_chunk_count_; | 283 size_t in_flight_chunk_count_; |
| 283 size_t current_iteration_index_; | 284 size_t current_iteration_index_; |
| 284 size_t max_chunks_; | 285 size_t max_chunks_; |
| 285 ScopedVector<TraceBufferChunk> chunks_; | 286 ScopedVector<TraceBufferChunk> chunks_; |
| 286 | 287 |
| 287 DISALLOW_COPY_AND_ASSIGN(TraceBufferVector); | 288 DISALLOW_COPY_AND_ASSIGN(TraceBufferVector); |
| 288 }; | 289 }; |
| 289 | 290 |
| 290 } // namespace | 291 } // namespace |
| 291 | 292 |
| 292 TraceBufferChunk::TraceBufferChunk(uint32 seq) : next_free_(0), seq_(seq) {} | 293 TraceBufferChunk::TraceBufferChunk(uint32_t seq) : next_free_(0), seq_(seq) {} |
| 293 | 294 |
| 294 TraceBufferChunk::~TraceBufferChunk() {} | 295 TraceBufferChunk::~TraceBufferChunk() {} |
| 295 | 296 |
| 296 void TraceBufferChunk::Reset(uint32 new_seq) { | 297 void TraceBufferChunk::Reset(uint32_t new_seq) { |
| 297 for (size_t i = 0; i < next_free_; ++i) | 298 for (size_t i = 0; i < next_free_; ++i) |
| 298 chunk_[i].Reset(); | 299 chunk_[i].Reset(); |
| 299 next_free_ = 0; | 300 next_free_ = 0; |
| 300 seq_ = new_seq; | 301 seq_ = new_seq; |
| 301 cached_overhead_estimate_.reset(); | 302 cached_overhead_estimate_.reset(); |
| 302 } | 303 } |
| 303 | 304 |
| 304 TraceEvent* TraceBufferChunk::AddTraceEvent(size_t* event_index) { | 305 TraceEvent* TraceBufferChunk::AddTraceEvent(size_t* event_index) { |
| 305 DCHECK(!IsFull()); | 306 DCHECK(!IsFull()); |
| 306 *event_index = next_free_++; | 307 *event_index = next_free_++; |
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| 390 TraceBuffer* TraceBuffer::CreateTraceBufferRingBuffer(size_t max_chunks) { | 391 TraceBuffer* TraceBuffer::CreateTraceBufferRingBuffer(size_t max_chunks) { |
| 391 return new TraceBufferRingBuffer(max_chunks); | 392 return new TraceBufferRingBuffer(max_chunks); |
| 392 } | 393 } |
| 393 | 394 |
| 394 TraceBuffer* TraceBuffer::CreateTraceBufferVectorOfSize(size_t max_chunks) { | 395 TraceBuffer* TraceBuffer::CreateTraceBufferVectorOfSize(size_t max_chunks) { |
| 395 return new TraceBufferVector(max_chunks); | 396 return new TraceBufferVector(max_chunks); |
| 396 } | 397 } |
| 397 | 398 |
| 398 } // namespace trace_event | 399 } // namespace trace_event |
| 399 } // namespace base | 400 } // namespace base |
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