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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/deopt_instructions.h" | 5 #include "vm/deopt_instructions.h" |
6 | 6 |
7 #include "vm/assembler.h" | 7 #include "vm/assembler.h" |
8 #include "vm/code_patcher.h" | 8 #include "vm/code_patcher.h" |
9 #include "vm/intermediate_language.h" | 9 #include "vm/intermediate_language.h" |
10 #include "vm/locations.h" | 10 #include "vm/locations.h" |
11 #include "vm/parser.h" | 11 #include "vm/parser.h" |
12 #include "vm/stack_frame.h" | 12 #include "vm/stack_frame.h" |
| 13 #include "vm/trace_buffer.h" |
13 | 14 |
14 namespace dart { | 15 namespace dart { |
15 | 16 |
16 DEFINE_FLAG(bool, compress_deopt_info, true, | 17 DEFINE_FLAG(bool, compress_deopt_info, true, |
17 "Compress the size of the deoptimization info for optimized code."); | 18 "Compress the size of the deoptimization info for optimized code."); |
18 DECLARE_FLAG(bool, trace_deoptimization); | 19 DECLARE_FLAG(bool, trace_deoptimization); |
19 DECLARE_FLAG(bool, trace_deoptimization_verbose); | 20 DECLARE_FLAG(bool, trace_deoptimization_verbose); |
20 | 21 |
21 | 22 |
22 DeoptContext::DeoptContext(const StackFrame* frame, | 23 DeoptContext::DeoptContext(const StackFrame* frame, |
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332 FillDeferredSlots(this, &deferred_object_refs_); | 333 FillDeferredSlots(this, &deferred_object_refs_); |
333 | 334 |
334 // Compute total number of artificial arguments used during deoptimization. | 335 // Compute total number of artificial arguments used during deoptimization. |
335 intptr_t deopt_arg_count = 0; | 336 intptr_t deopt_arg_count = 0; |
336 for (intptr_t i = 0; i < DeferredObjectsCount(); i++) { | 337 for (intptr_t i = 0; i < DeferredObjectsCount(); i++) { |
337 deopt_arg_count += GetDeferredObject(i)->ArgumentCount(); | 338 deopt_arg_count += GetDeferredObject(i)->ArgumentCount(); |
338 } | 339 } |
339 | 340 |
340 // Since this is the only step where GC can occur during deoptimization, | 341 // Since this is the only step where GC can occur during deoptimization, |
341 // use it to report the source line where deoptimization occured. | 342 // use it to report the source line where deoptimization occured. |
| 343 const Code& code = Code::Handle(code_); |
| 344 ASSERT(!code.IsNull()); |
| 345 const Function& top_function = Function::Handle(code.function()); |
| 346 // TODO(johnmccutchan): Enable appending service objects to a trace message. |
| 347 // Once that is possible, add the Code object which was deoptimized. |
| 348 top_function.log()->TraceF("Deoptimized (reason %" Pd " '%s')", |
| 349 static_cast<intptr_t>(deopt_reason()), |
| 350 DeoptReasonToText(deopt_reason())); |
| 351 |
342 if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) { | 352 if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) { |
343 DartFrameIterator iterator; | 353 DartFrameIterator iterator; |
344 StackFrame* top_frame = iterator.NextFrame(); | 354 StackFrame* top_frame = iterator.NextFrame(); |
345 ASSERT(top_frame != NULL); | 355 ASSERT(top_frame != NULL); |
346 const Code& code = Code::Handle(top_frame->LookupDartCode()); | |
347 const Function& top_function = Function::Handle(code.function()); | |
348 const Script& script = Script::Handle(top_function.script()); | 356 const Script& script = Script::Handle(top_function.script()); |
349 const intptr_t token_pos = code.GetTokenIndexOfPC(top_frame->pc()); | 357 const intptr_t token_pos = code.GetTokenIndexOfPC(top_frame->pc()); |
350 intptr_t line, column; | 358 intptr_t line, column; |
351 script.GetTokenLocation(token_pos, &line, &column); | 359 script.GetTokenLocation(token_pos, &line, &column); |
352 String& line_string = String::Handle(script.GetLine(line)); | 360 String& line_string = String::Handle(script.GetLine(line)); |
353 OS::PrintErr(" Function: %s\n", top_function.ToFullyQualifiedCString()); | 361 OS::PrintErr(" Function: %s\n", top_function.ToFullyQualifiedCString()); |
354 OS::PrintErr(" Line %" Pd ": '%s'\n", line, line_string.ToCString()); | 362 OS::PrintErr(" Line %" Pd ": '%s'\n", line, line_string.ToCString()); |
355 OS::PrintErr(" Deopt args: %" Pd "\n", deopt_arg_count); | 363 OS::PrintErr(" Deopt args: %" Pd "\n", deopt_arg_count); |
| 364 top_function.log()->TraceF("Deoptimized at line %" Pd ": '%s'", |
| 365 line, |
| 366 line_string.ToCString()); |
356 } | 367 } |
357 | 368 |
358 return deopt_arg_count; | 369 return deopt_arg_count; |
359 } | 370 } |
360 | 371 |
361 | 372 |
362 RawArray* DeoptContext::DestFrameAsArray() { | 373 RawArray* DeoptContext::DestFrameAsArray() { |
363 ASSERT(dest_frame_ != NULL && dest_frame_is_allocated_); | 374 ASSERT(dest_frame_ != NULL && dest_frame_is_allocated_); |
364 const Array& dest_array = | 375 const Array& dest_array = |
365 Array::Handle(Array::New(dest_frame_size_)); | 376 Array::Handle(Array::New(dest_frame_size_)); |
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1477 Smi* offset, | 1488 Smi* offset, |
1478 DeoptInfo* info, | 1489 DeoptInfo* info, |
1479 Smi* reason) { | 1490 Smi* reason) { |
1480 intptr_t i = index * kEntrySize; | 1491 intptr_t i = index * kEntrySize; |
1481 *offset ^= table.At(i); | 1492 *offset ^= table.At(i); |
1482 *info ^= table.At(i + 1); | 1493 *info ^= table.At(i + 1); |
1483 *reason ^= table.At(i + 2); | 1494 *reason ^= table.At(i + 2); |
1484 } | 1495 } |
1485 | 1496 |
1486 } // namespace dart | 1497 } // namespace dart |
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