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Reland "[heap] Move start of incremental marking in allocation"

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This is a reland of d6a14abe05

Test wasn't written with incremental/concurrent marking in mind, so
simply disabling it for this particular unittest.

Original change's description:
> [heap] Move start of incremental marking in allocation
>
> Move start of incremental marking out of
> RefillLinearAllocationAreaFromFreeList. This avoids a potential
> safepoint while holding allocation_mutex_.
>
> Bug: v8:10315
> Change-Id: Ieb60ac68f26199eea7b6b7ad6d874851382f3d69
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2287496
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68751}

Bug: v8:10315
Change-Id: I2a665400d9a784b1557474a051839d5c8b45e9e2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2292241
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68818}
This commit is contained in:
Dominik Inführ 2020-07-13 13:46:35 +02:00 committed by Commit Bot
parent 62e06b3965
commit fc48a2283c
3 changed files with 11 additions and 6 deletions
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15
src/heap/paged-spaces.cc
View File

@ -529,12 +529,6 @@ bool PagedSpace::RefillLinearAllocationAreaFromFreeList(
// if it is big enough.
FreeLinearAllocationArea();
if (!is_local_space()) {
heap()->StartIncrementalMarkingIfAllocationLimitIsReached(
heap()->GCFlagsForIncrementalMarking(),
kGCCallbackScheduleIdleGarbageCollection);
}
size_t new_node_size = 0;
FreeSpace new_node =
free_list_->Allocate(size_in_bytes, &new_node_size, origin);
@ -1019,6 +1013,15 @@ AllocationResult PagedSpace::AllocateRawSlow(int size_in_bytes,
top_on_previous_step_ ? top() - top_on_previous_step_ : 0;
DCHECK_IMPLIES(!SupportsInlineAllocation(), bytes_since_last == 0);
if (!is_local_space()) {
// Start incremental marking before the actual allocation, this allows the
// allocation function to mark the object black when incremental marking is
// running.
heap()->StartIncrementalMarkingIfAllocationLimitIsReached(
heap()->GCFlagsForIncrementalMarking(),
kGCCallbackScheduleIdleGarbageCollection);
}
#ifdef V8_HOST_ARCH_32_BIT
AllocationResult result =
alignment != kWordAligned

1
test/cctest/heap/test-external-string-tracker.cc
View File

@ -130,6 +130,7 @@ TEST(ExternalString_ExternalBackingStoreSizeIncreasesMarkCompact) {
}
TEST(ExternalString_ExternalBackingStoreSizeIncreasesAfterExternalization) {
ManualGCScope manual_gc_scope;
CcTest::InitializeVM();
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();

1
test/unittests/logging/counters-unittest.cc
View File

@ -726,6 +726,7 @@ TEST_F(RuntimeCallStatsTest, CallbackFunction) {
TEST_F(RuntimeCallStatsTest, ApiGetter) {
FLAG_allow_natives_syntax = true;
FLAG_incremental_marking = false;
RuntimeCallCounter* callback_counter =
stats()->GetCounter(RuntimeCallCounterId::kFunctionCallback);