blob: 7583aaaadf34c451a8af1f9e4a8ba5d63613191e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/heap/incremental-marking-job.h"
#include "src/base/platform/time.h"
#include "src/heap/heap-inl.h"
#include "src/heap/heap.h"
#include "src/heap/incremental-marking.h"
#include "src/isolate.h"
#include "src/v8.h"
#include "src/vm-state-inl.h"
namespace v8 {
namespace internal {
void IncrementalMarkingJob::Start(Heap* heap) {
DCHECK(!heap->incremental_marking()->IsStopped());
ScheduleTask(heap);
}
void IncrementalMarkingJob::ScheduleTask(Heap* heap) {
if (!task_pending_ && !heap->IsTearingDown()) {
v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(heap->isolate());
task_pending_ = true;
auto task = new Task(heap->isolate(), this);
V8::GetCurrentPlatform()->CallOnForegroundThread(isolate, task);
}
}
void IncrementalMarkingJob::Task::Step(Heap* heap) {
const int kIncrementalMarkingDelayMs = 1;
double deadline =
heap->MonotonicallyIncreasingTimeInMs() + kIncrementalMarkingDelayMs;
heap->incremental_marking()->AdvanceIncrementalMarking(
deadline, i::IncrementalMarking::NO_GC_VIA_STACK_GUARD,
i::StepOrigin::kTask);
heap->FinalizeIncrementalMarkingIfComplete(
GarbageCollectionReason::kFinalizeMarkingViaTask);
}
void IncrementalMarkingJob::Task::RunInternal() {
VMState<GC> state(isolate());
TRACE_EVENT_CALL_STATS_SCOPED(isolate(), "v8", "V8.Task");
Heap* heap = isolate()->heap();
IncrementalMarking* incremental_marking = heap->incremental_marking();
if (incremental_marking->IsStopped()) {
if (heap->IncrementalMarkingLimitReached() !=
Heap::IncrementalMarkingLimit::kNoLimit) {
heap->StartIncrementalMarking(heap->GCFlagsForIncrementalMarking(),
GarbageCollectionReason::kIdleTask,
kGCCallbackScheduleIdleGarbageCollection);
}
}
// Clear this flag after StartIncrementalMarking call to avoid
// scheduling a new task when startining incremental marking.
job_->task_pending_ = false;
if (!incremental_marking->IsStopped()) {
Step(heap);
if (!incremental_marking->IsStopped()) {
job_->ScheduleTask(heap);
}
}
}
} // namespace internal
} // namespace v8
|
