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Issue 10837037: Age code to allow reclaiming old unexecuted functions (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Nits Created 1 year, 6 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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55 // ------------------------------------------------------------------------- 55 // -------------------------------------------------------------------------
56 // MarkCompactCollector 56 // MarkCompactCollector
57 57
58 MarkCompactCollector::MarkCompactCollector() : // NOLINT 58 MarkCompactCollector::MarkCompactCollector() : // NOLINT
59 #ifdef DEBUG 59 #ifdef DEBUG
60 state_(IDLE), 60 state_(IDLE),
61 #endif 61 #endif
62 sweep_precisely_(false), 62 sweep_precisely_(false),
63 reduce_memory_footprint_(false), 63 reduce_memory_footprint_(false),
64 abort_incremental_marking_(false), 64 abort_incremental_marking_(false),
65 marking_parity_(ODD_MARKING_PARITY),
65 compacting_(false), 66 compacting_(false),
66 was_marked_incrementally_(false), 67 was_marked_incrementally_(false),
67 tracer_(NULL), 68 tracer_(NULL),
68 migration_slots_buffer_(NULL), 69 migration_slots_buffer_(NULL),
69 heap_(NULL), 70 heap_(NULL),
70 code_flusher_(NULL), 71 code_flusher_(NULL),
71 encountered_weak_maps_(NULL) { } 72 encountered_weak_maps_(NULL) { }
72 73
73 74
74 #ifdef VERIFY_HEAP 75 #ifdef VERIFY_HEAP
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397 if (!FLAG_collect_maps) ReattachInitialMaps(); 398 if (!FLAG_collect_maps) ReattachInitialMaps();
398 399
399 #ifdef DEBUG 400 #ifdef DEBUG
400 if (FLAG_verify_native_context_separation) { 401 if (FLAG_verify_native_context_separation) {
401 VerifyNativeContextSeparation(heap_); 402 VerifyNativeContextSeparation(heap_);
402 } 403 }
403 #endif 404 #endif
404 405
405 Finish(); 406 Finish();
406 407
408 if (marking_parity_ == EVEN_MARKING_PARITY) {
409 marking_parity_ = ODD_MARKING_PARITY;
410 } else {
411 ASSERT(marking_parity_ == ODD_MARKING_PARITY);
412 marking_parity_ = EVEN_MARKING_PARITY;
413 }
414
407 tracer_ = NULL; 415 tracer_ = NULL;
408 } 416 }
409 417
410 418
411 #ifdef VERIFY_HEAP 419 #ifdef VERIFY_HEAP
412 void MarkCompactCollector::VerifyMarkbitsAreClean(PagedSpace* space) { 420 void MarkCompactCollector::VerifyMarkbitsAreClean(PagedSpace* space) {
413 PageIterator it(space); 421 PageIterator it(space);
414 422
415 while (it.has_next()) { 423 while (it.has_next()) {
416 Page* p = it.next(); 424 Page* p = it.next();
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2337 void VisitCodeTarget(RelocInfo* rinfo) { 2345 void VisitCodeTarget(RelocInfo* rinfo) {
2338 ASSERT(RelocInfo::IsCodeTarget(rinfo->rmode())); 2346 ASSERT(RelocInfo::IsCodeTarget(rinfo->rmode()));
2339 Object* target = Code::GetCodeFromTargetAddress(rinfo->target_address()); 2347 Object* target = Code::GetCodeFromTargetAddress(rinfo->target_address());
2340 Object* old_target = target; 2348 Object* old_target = target;
2341 VisitPointer(&target); 2349 VisitPointer(&target);
2342 if (target != old_target) { 2350 if (target != old_target) {
2343 rinfo->set_target_address(Code::cast(target)->instruction_start()); 2351 rinfo->set_target_address(Code::cast(target)->instruction_start());
2344 } 2352 }
2345 } 2353 }
2346 2354
2355 void VisitCodeAgeSequence(RelocInfo* rinfo) {
2356 ASSERT(RelocInfo::IsCodeAgeSequence(rinfo->rmode()));
2357 Object* stub = rinfo->code_age_stub();
2358 ASSERT(stub != NULL);
2359 VisitPointer(&stub);
2360 rinfo->set_code_age_stub(Code::cast(stub));
Michael Starzinger 2012/11/02 15:29:34 Can we use the "if (target != old_target)" pattern
danno 2012/11/09 13:05:30 Done.
2361 }
2362
2347 void VisitDebugTarget(RelocInfo* rinfo) { 2363 void VisitDebugTarget(RelocInfo* rinfo) {
2348 ASSERT((RelocInfo::IsJSReturn(rinfo->rmode()) && 2364 ASSERT((RelocInfo::IsJSReturn(rinfo->rmode()) &&
2349 rinfo->IsPatchedReturnSequence()) || 2365 rinfo->IsPatchedReturnSequence()) ||
2350 (RelocInfo::IsDebugBreakSlot(rinfo->rmode()) && 2366 (RelocInfo::IsDebugBreakSlot(rinfo->rmode()) &&
2351 rinfo->IsPatchedDebugBreakSlotSequence())); 2367 rinfo->IsPatchedDebugBreakSlotSequence()));
2352 Object* target = Code::GetCodeFromTargetAddress(rinfo->call_address()); 2368 Object* target = Code::GetCodeFromTargetAddress(rinfo->call_address());
2353 VisitPointer(&target); 2369 VisitPointer(&target);
2354 rinfo->set_call_address(Code::cast(target)->instruction_start()); 2370 rinfo->set_call_address(Code::cast(target)->instruction_start());
2355 } 2371 }
2356 2372
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3773 while (buffer != NULL) { 3789 while (buffer != NULL) {
3774 SlotsBuffer* next_buffer = buffer->next(); 3790 SlotsBuffer* next_buffer = buffer->next();
3775 DeallocateBuffer(buffer); 3791 DeallocateBuffer(buffer);
3776 buffer = next_buffer; 3792 buffer = next_buffer;
3777 } 3793 }
3778 *buffer_address = NULL; 3794 *buffer_address = NULL;
3779 } 3795 }
3780 3796
3781 3797
3782 } } // namespace v8::internal 3798 } } // namespace v8::internal
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