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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/heap_profiler_allocation_context_tracker.h" | 5 #include "base/trace_event/heap_profiler_allocation_context_tracker.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 #include <iterator> | 8 #include <iterator> |
9 | 9 |
10 #include "base/atomicops.h" | 10 #include "base/atomicops.h" |
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199 } | 199 } |
200 case CaptureMode::NATIVE_STACK: | 200 case CaptureMode::NATIVE_STACK: |
201 { | 201 { |
202 // Backtrace contract requires us to return bottom frames, i.e. | 202 // Backtrace contract requires us to return bottom frames, i.e. |
203 // from main() and up. Stack unwinding produces top frames, i.e. | 203 // from main() and up. Stack unwinding produces top frames, i.e. |
204 // from this point and up until main(). We request many frames to | 204 // from this point and up until main(). We request many frames to |
205 // make sure we reach main(), and then copy bottom portion of them. | 205 // make sure we reach main(), and then copy bottom portion of them. |
206 const void* frames[128]; | 206 const void* frames[128]; |
207 static_assert(arraysize(frames) >= Backtrace::kMaxFrameCount, | 207 static_assert(arraysize(frames) >= Backtrace::kMaxFrameCount, |
208 "not requesting enough frames to fill Backtrace"); | 208 "not requesting enough frames to fill Backtrace"); |
209 #if HAVE_TRACE_STACK_FRAME_POINTERS && !defined(OS_NACL) | 209 #if CAN_UNWIND_WITH_FRAME_POINTERS && !defined(OS_NACL) |
210 size_t frame_count = debug::TraceStackFramePointers( | 210 size_t frame_count = debug::TraceStackFramePointers( |
211 frames, | 211 frames, |
212 arraysize(frames), | 212 arraysize(frames), |
213 1 /* exclude this function from the trace */ ); | 213 1 /* exclude this function from the trace */ ); |
214 #else | 214 #else |
215 size_t frame_count = 0; | 215 size_t frame_count = 0; |
216 NOTREACHED(); | 216 NOTREACHED(); |
217 #endif | 217 #endif |
218 | 218 |
219 // Copy frames backwards | 219 // Copy frames backwards |
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241 ctx->type_name = pseudo_stack_.back().trace_event_category; | 241 ctx->type_name = pseudo_stack_.back().trace_event_category; |
242 } else { | 242 } else { |
243 ctx->type_name = nullptr; | 243 ctx->type_name = nullptr; |
244 } | 244 } |
245 | 245 |
246 return true; | 246 return true; |
247 } | 247 } |
248 | 248 |
249 } // namespace trace_event | 249 } // namespace trace_event |
250 } // namespace base | 250 } // namespace base |
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