Commit Graph

543 Commits

Author SHA1 Message Date
Michael Lippautz
695a449032 cppgc: Check ephemerons for unset key
Ephemerons are based around WeakMember which may just be null at the
time the pair is considered for liveness. Bail out of marking for null
keys, as they write barrier would anyways make the value strong when
marking the key.

Bug: chromium:1056170
Change-Id: If8775a370824b88fc67fa479a0c0893985fbf5f4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2692571
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72714}
2021-02-12 16:55:00 +00:00
Dominik Inführ
27fca37d15 [heap] Fix flaky test for GC epilogues
Ensure that epilogues are added to the LocalHeap before starting the GC.
Adding the epilogue after invoking NotifyStarted() might mean that the
epilogue is only added after the GC is already done and the epilogue
isn't run at all. The test flakily fails because the epilogue didn't
execute then.

Bug: v8:11434
Change-Id: I60723a99cd9224307f48acd0c0e8af3f93dd3eb2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2690600
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72688}
2021-02-12 10:08:51 +00:00
Toon Verwaest
c8a6fb4f6f Reland "[interpreter] Speed up the BytecodeArrayAccessor through direct memory access"
This speeds up sparkplug by >20%.

This reland fixes the OffHeapBytecodeArray to also register a GC
callback. Turns out off-heap here doesn't mean that the underlying
bytecode array is off-heap and it can in fact move.

Change-Id: I7c6e82abd2a7be08ead537ab84855e76edc3b290
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2688400
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72677}
2021-02-11 19:09:27 +00:00
Omer Katz
c6a3190bf8 cppgc: Rename allocated_size to physical_size in statistics
Bug: chromium:1056170
Change-Id: I6fb5278dd1ef14faac13602cd28286d0e0d29054
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2689198
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72672}
2021-02-11 17:44:35 +00:00
Michael Lippautz
60ba22061e cppgc: Remove explit setter to enable testing features
cppgc/testing.h is already part of a testonly gn target which only can
be included from other test targets. This prevents any production
target to depend on cppgc/testing.h.

Bug: chromium:1056170
Change-Id: I51f6c47ffac2a05c8c63d7b4663c456a64fe75b4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2689196
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72670}
2021-02-11 17:23:02 +00:00
Omer Katz
daaff7dfe9 cppgc: Collect heap statistics
HeapBase::CollectStatistics returns a HeapStatistics struct that can be
used by blink to populate a memory dump.

Bug: chromium:1056170
Change-Id: Ic147a02ba6b4aa77bf92cfca067da70b7e1af55b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2689181
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72660}
2021-02-11 14:58:06 +00:00
Michael Lippautz
78ffd6e875 cppgc-js: Add WrapperDescriptor
WrapperDescriptor is used to describe how JS wrapper objects can be
inspected to find C++ wrappable objects. In addition, to specifying
which embedder fields are used to find type and instance, the
descriptor also provides and embedder id that identifies
garbage-collected objects. It is expected that the first field of the
type is a uint16_t with that id.

Bug: chromium:1056170
Change-Id: I9cf8d79db972f2dea023114fd5a567e89a3bf373
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2688399
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72657}
2021-02-11 13:28:27 +00:00
Zhi An Ng
518ee01d39 Revert "Reland "[interpreter] Speed up the BytecodeArrayAccessor through direct memory access""
This reverts commit 60748ee2df.

Reason for revert: Broke Linux64 ASAN https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20ASAN/38792/overview.

There are 4 changes in that range causing the failure, I found that this change caused the failure by running locally `./tools/run-tests.py --outdir=out/repro mjsunit/wasm/gc-stress --variant turboprop_as_toptier --random-seed-stress-count 100`.

Original change's description:
> Reland "[interpreter] Speed up the BytecodeArrayAccessor through direct memory access"
>
> Tbr: ulan@chromium.org, neis@chromium.org, leszeks@chromium.org
> No-Presubmit: true
> Change-Id: I4ceb9e21ac7d78a87776b4be174772539d2da8d9
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2685173
> Commit-Queue: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#72632}

TBR=ulan@chromium.org,neis@chromium.org,leszeks@chromium.org,verwaest@chromium.org

Change-Id: I441ddfda5d852b7a01f38a9e60edc56f40ae626a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2686266
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72635}
2021-02-10 18:33:35 +00:00
Toon Verwaest
60748ee2df Reland "[interpreter] Speed up the BytecodeArrayAccessor through direct memory access"
Tbr: ulan@chromium.org, neis@chromium.org, leszeks@chromium.org
No-Presubmit: true
Change-Id: I4ceb9e21ac7d78a87776b4be174772539d2da8d9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2685173
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72632}
2021-02-10 17:06:52 +00:00
Nico Hartmann
ef89782a5b Revert "[interpreter] Speed up the BytecodeArrayAccessor through direct memory access"
This reverts commit f4bd6f6b0b.

Reason for revert: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20-%20pointer%20compression/13275/overview

Original change's description:
> [interpreter] Speed up the BytecodeArrayAccessor through direct memory access
>
> This speeds up the sparkplug compiler by >20%.
>
> Change-Id: I9dece7209b0ddf53d876df9aca4b2feede6259c5
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2682644
> Auto-Submit: Toon Verwaest <verwaest@chromium.org>
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#72624}

TBR=ulan@chromium.org,neis@chromium.org,leszeks@chromium.org,verwaest@chromium.org

Change-Id: Iac3832bd08a9075e3127886635ba96f7acfc49cf
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2685169
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72625}
2021-02-10 14:01:22 +00:00
Toon Verwaest
f4bd6f6b0b [interpreter] Speed up the BytecodeArrayAccessor through direct memory access
This speeds up the sparkplug compiler by >20%.

Change-Id: I9dece7209b0ddf53d876df9aca4b2feede6259c5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2682644
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72624}
2021-02-10 13:35:40 +00:00
Michael Lippautz
5d67f90e0f cppgc-js: Avoid using marked bytes deadline during the atomic pause
Bug: chromium:1056170
Change-Id: I225f81235fe9d4f8fd26cc49446534e3f6c884ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2684834
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72609}
2021-02-09 21:38:51 +00:00
Michael Lippautz
fbcaf729f2 api, cppgc-js: Allow creating a v8::CppHeap in detached state
The detached CppHeap allows for allocation without invoking garbage
collections.  Allocated bytes are reported on the first allocation
after the CppHeap has been attached to an Isolate.

States:
- Detached: Allow only allocation;
- Attached: Unified heap GCs;
- Termination GC: Require detached state;

Destruction:
- Heap::TearDown: Detach if attached;
- ~CppHeap: Detach if attached;

Bug: chromium:1056170
Change-Id: I95ce029f36a7f10392257080b6e23e13cc0fc7b8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2672940
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72579}
2021-02-09 09:57:52 +00:00
Michael Lippautz
8c99b253af cppgc: Avoid initializing cppgc platform through V8
Embedders may use cppgc (or v8::CppHeap) earlier than V8's Isolate and
platform are initialized. Require explicit initialization of cppgc to
avoid recurring init calls with potentially conflicting parameters.

Bug: chromium:1056170
Change-Id: I613452954b322c9a5bf074eefd25107b4579958c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2682648
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72573}
2021-02-09 08:26:11 +00:00
Michael Lippautz
c7ff90d97d cppgc: Avoid dispatching write barrier during atomic pause
This change avoid dispatching a write barrier during the atomic pause.
The dispatch can generally be triggered through pre-finalizers.

In future, further checks may be added to avoid mis-use of
pre-finalizers.

Bug: chromium:1056170, chromium:1175560
Change-Id: I119e18372633b2375f60e17b4c881f68bb20bf66
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2679685
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72560}
2021-02-08 12:56:09 +00:00
Michael Lippautz
65893d84e5 cppgc: Fix low-level write barriers
Some types of supported low-level write barrier only requires passing
a slot, which may not be even part of a heap object but stack.

This complicates the situation, as even with caged heap, there's no
way to distinguish a stack and heap slot.

Solve this by passing an optional callback that can lazy be used to
get the heap. This can be used by the embedder to retrieve the heap
from e.g. TLS if needed.  This aligns the barrier with Oilpan in
Blink.

Bug: chromium:1056170
Change-Id: I1e5d022ab17a2614a67b6ef39ed12691bcbd0ac6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2675924
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72550}
2021-02-05 15:22:04 +00:00
Ulan Degenbaev
3265309ab8 [heap] Add GC epilogue callbacks in LocalHeap
A background thread can register a callback that is guaranteed to be
invoked after each GC in a safepoint before background threads resume.
This will be allow the background compiler and parser to keep raw
pointers to frequently accessed objects and ensure that they are fixed
up after GC.

Note that the existing global GC epilogues are run after background
threads resume, so they are unsafe for background threads.

Change-Id: I1c782f912d63afc09c4982d393a6f3805a318962
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2675933
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72548}
2021-02-05 14:37:17 +00:00
Michael Lippautz
e963b636a5 cppgc: Add testing API structure
Adds testing API that can only be used after enabling it on a heap.
The call that enables testing is only provided via v8_for_testing or
cppgc_for_testing build targets which protects against misusing from
production code.

Change-Id: I24a8f5543a2bb479481384e2c555d231383e5d12
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2667513
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72503}
2021-02-03 16:00:37 +00:00
Michael Lippautz
7e9aa1bd8f cppgc: Add Persistent capabilitites
- Allow downcasting construciton and assignment;
- Add WeakCrossThreadPersistent::Lock() that safely retrieves a strong
  handle for a weak reference;

Bug: chromium:1056170
Change-Id: I5f8d85a87c9955506dd87723ffb4c80d66770c04
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2663160
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72468}
2021-02-02 00:25:22 +00:00
Ulan Degenbaev
6df1aec62c [heap, infra] Remove --local-heaps and --concurrent-allocation flags
The flags are enabled by default and have stable coverage.
This also removes the corresponding bots.

Bug: v8:10315
Change-Id: Icce01383050dff758b6554db8e0c3589d6e5459c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2658324
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72457}
2021-02-01 11:01:26 +00:00
Michael Lippautz
732e22e088 cppgc: Add getters internal heap state
Adds getters for GC phases to be used by advanced embedders to ensure
and check consistency conditions as needed.

Bug: chromium:1056170
Change-Id: Ia0b219f838bf31f0edbfe40585b95bb5eafa734d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2658328
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72430}
2021-01-29 13:19:23 +00:00
Omer Katz
e6e9721b55 cppgc: Increase tolerance in MetricRecorder unittests
Tolerance was set to 50 microseconds. This is not enough and causes
flaky failures. Tolerance is needed because we record milliseconds and
an empty scope can still take a few milliseconds to create and destroy.

Increasing the tolerance to 500 microseconds should suffice and makes
sense for the test. All expected values are in 10s of milliseconds, so
half a millisecond tolerance should be reasonable.

Bug: v8:11367
Change-Id: I2d284efe5176ec9938b6a378f4b5f1bda0e58781
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2659058
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Auto-Submit: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72426}
2021-01-29 11:21:23 +00:00
Michael Lippautz
c5b6ec91f4 cppgc: Introduce DisallowGarbageCollectionScope
Allows for prohibiting GCs and will result in a crash in case a GC
finalization event is triggered.

Complements NoGarbageCollectionScope which ignores GC finalization
events.

Bug: chromium:1056170
Change-Id: Ie2a72a8675462b24692225af17c8f284318337ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2656260
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72413}
2021-01-28 21:35:32 +00:00
Michael Lippautz
677a9ad9cd cppgc: Add TraceTrait<Member<T>>
Embedders forward the Value in TraceEphemeron as Member reference (as
depicted in the API docs). Add TraceTrait<Member<T>> that forwards to
TraceTrait<T> accordingly, supporting the intended use case.

Bug: chromium:1056170
Change-Id: I3b247cb3553ae34d9ff5393aefeaec24068e78c2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2656255
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72412}
2021-01-28 20:49:12 +00:00
Michael Lippautz
f91949a153 cppgc: Allow BasicPersistent::Clear() with incomplete type
This allows construction and destruction of empty Persistent and
friends, which simplifiest the use for embedders.

Bug: chromium:1056170
Change-Id: I4286639aa5d50f9f98654b859de10bb80cbada21
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2655505
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72396}
2021-01-28 12:08:29 +00:00
Omer Katz
7cc78c535d cppgc: Align cppgc::MetricRecorder with v8::metrics::Recorder
Update the MetricRecorder struct to have a similar structure and similar
fields to the GC struct defined in v8-metrics.h

Bug: chromium:1056170
Change-Id: Ieb77412476353557134aeac5cf8f66ab257e22dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2653236
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72394}
2021-01-28 11:29:29 +00:00
Omer Katz
37d24e5647 cppgc: Change histograms from ms to us
Bug: chromium:1056170
Change-Id: Iaa3cefc652657246fffe7998dd8faa9d008d9195
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2652496
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72370}
2021-01-27 16:34:08 +00:00
Omer Katz
7af731c93d cppgc: Implement lazy sweeping on allocation
Sweep page by page in the space until we find a slot big enough for the
current allocation.

Bug: chromium:1056170
Change-Id: Id6dcf2d4db20268090b4626340bbed44f67d053c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2649259
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72369}
2021-01-27 16:28:19 +00:00
Omer Katz
ae1d7f8ed1 cppgc: Add additional memory metrics
Bug: chromium:1056170
Change-Id: Ia312e96b421d596d25cccf584c2df823bd9e1ea0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2652498
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72367}
2021-01-27 15:45:08 +00:00
Michael Lippautz
35dcecf607 cppgc: Add HeapState API
The API allows for querying
- IsAllocationAllowed: Certain GC phases prohibit allocation which can
  be queried; Should be mostly used for debugging checks.
- IsMarking: Allows for querying whether the garbage collector is
  currently marking.

Bug: chromium:1056170
Change-Id: I20ba5fb5be9de6694e8418fa885920eb04bd75ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2649257
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72359}
2021-01-27 10:58:36 +00:00
Michael Lippautz
a2cf158ad4 cppgc-js: Report C++ memory to V8's heap growing
Add reporting of C++ memory to V8's heap growing strategy via
existing EmbedderHeapTracer interface.

In addition, introduce API-level NoGarbageCollectionScope which
allows to temporarily avoid scheduling GC finalizations. Replace
internal NoGCScope with NoGarbageCollectionScope and remove
NoGCScope.

Bug: chromium:1056170
Change-Id: I0ad3dfd67eb81f09f48e2ab87f9bbece7491ed71
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2650210
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72345}
2021-01-27 00:32:05 +00:00
Michael Lippautz
6d11bcda29 cppgc: Introduce ObjectSizeTrait
Users of padded objects must know the actual object size for
implementing custom finalizers.

Bug: chromium:1056170
Change-Id: I0ddf9066cfece0a8d18a9e6fd985d09449eea92a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2644941
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72269}
2021-01-22 20:53:55 +00:00
Michael Lippautz
03cea71144 cppgc: Fix GC traits and add documentation
- Adds IsGarbageCollectedWithMixin<T> to check for mixin applications.
- Add documentation to all trait values.

Bug: chromium:1056170
Change-Id: I22c255c36c791a5ff9b38d034f205f1e23c968ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2644951
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72268}
2021-01-22 20:27:09 +00:00
Omer Katz
ae8930002e cppgc: Add object/memory size histograms for UMA
Bug: chromium:1056170
Change-Id: I3d6cbff3e37bb541481a014056e539bd4824c37c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2642259
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72266}
2021-01-22 17:25:42 +00:00
Michael Lippautz
373803c959 cppgc: Fix IsGarabgeCollected trait and friends
The TraceTrait<T> checks whether T is a mixin to decide whether we can
use the fast (arithmetic) or slow (bitmap) method to look up the HoH.
Before this CL, the mixin application would also be considered as a
mixin because the marker is present, resulting in all cases going
through the object start bitmap.

The initial intention was to use the arithmetic for the mixin
applications as those inherit from GCed.

Bug: chromium:1056170
Change-Id: Ib0ba82a8f98e0481d2879ebacc1ca9bd9e675858
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2643395
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72262}
2021-01-22 16:20:46 +00:00
Omer Katz
adda4c5f98 cppgc: Add UMA support
This CL introduces cppgc::HistogramRecorder api which is similar to the
v8::metrics::Recorder api and is used by cppgc to report histogram
samples to embedders. Embedders should implement the api if they want to
collect histograms and provide an instance of it on heap creation.

CppHeap uses an adaptor class that implements the HistogramRecorder api
and is used to forward the relevant info to the relevant
v8::metrics::Recorder.

The api used 3 data structures: 2 for incremental steps that need to be
reported as they come (marking and sweeping) and 1 for the end of a GC
cycle that aggregates statistics over the entire cycle.
The data structure only provide the "raw" samples (e.g. atomic mark
time, incremental mark time, etc...). The embedder is expected to
compute aggregate histogram on its own (e.g. overall marking time).

Bug: chromium:1056170
Change-Id: If63ef50a29a21594f654edb83084598980d221ce
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2642258
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72256}
2021-01-22 15:04:35 +00:00
Michael Lippautz
d37562e543 heap: Improve unified heap test coverage
Add test for Cpp->JS references.

Bug: chromium:1056170
Change-Id: I7240483b6ad7393346b55a9756fcd4721e238119
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2642257
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72230}
2021-01-21 16:03:50 +00:00
Michael Lippautz
df212a095b cppgc,api: Add support for JS->C++ write barriers
Provide a way to trigger a write barrier when updating the embedder
fields. In future, such a mechanism should be encapsulated into V8.

Bug: chromium:1056170
Change-Id: I4e43362993c3e58d5bebdd58a7d46a39c0aa4f06
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2640419
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72227}
2021-01-21 14:28:00 +00:00
Michael Lippautz
852294fc4a heap,cppgc: Support for termination GC
Termination GCs are used to destroy remaining C++ object on the
managed heap to free potential off-heap memory. This is important for
gracefully shutting down workers.

Drive-by: Add guard prohibiting recursive sweeping calls on the
  mutator thread.

Bug: chromium:1056170
Change-Id: I02ea3b632d38f5beab18cc8f077cf717ed877909
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2631504
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72155}
2021-01-19 14:08:18 +00:00
Michael Lippautz
3494110a6c cppgc: Add support for const T in Member and friends
Adds support for Member<const T> by keeping the untyped storage in
MemberBase const, which is stronger than the required constness. All
accesses go through BasicMember which can re-add the appropriate
constness specified by the user.

The same concept is applied to all Member and Persistent handles.

Bug: chromium:1056170
Change-Id: I5a620258be3acb6a1b4b1437e69b8d7d1ec5ce6f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2625871
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72090}
2021-01-14 09:10:25 +00:00
Michael Lippautz
34e7ae615d cppgc-js: Account for C++ object sizes
Previously, for wrapper/wrappable pairs, only JS object size was
accounted for. With this change, the C++ part is also accounted for.

Change-Id: Ibd945cb28c808d8c01fa41453f94a6de9883b764
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2615258
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71959}
2021-01-07 19:03:34 +00:00
Omer Katz
d46c94db6d cppgc: Allow to disable incremental marking/sweeping
Add fields to HeapOptions to denote on heap creation that the heap does
not support incremental/concurrent marking/sweeping.
This only applies to standalone heaps.
When triggering a GC (either explicitly or by the heap growing
heuristics), the given config is limited to not trigger unsupported
marking/sweeping types.

Bug: chromium:1156170
Change-Id: Id7b5cf82962e7c40920f942df9415d798e2b6686
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2581961
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71698}
2020-12-10 15:59:38 +00:00
Dominik Inführ
c1b9e6907c [heap] Replace TRACE_BACKGROUND_GC macro with TRACE_GC1
Remove TRACE_BACKGROUND_GC which was used to emit events on the
background thread. It is replaced by TRACE_GC1, which uses the ThreadKind
argument to work both on main and background threads.

This CL also removes the dedicated BackgroundScope enum, all scopes
are now in GCTracer::Scope.

Change-Id: Ie377082d6a278dd46f2fa359611fdd99a08afcea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2560203
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71458}
2020-11-27 17:48:55 +00:00
Omer Katz
59a6b7d454 cppgc: Fix perfetto build
When V8_USE_PERFETTO is defined, TracingController doesn't have
AddTraceEvent and GetCategoryGroupEnabled methods.

Bug: v8:11203
Change-Id: I05d7ff829d8b134662bc1dbe4cb56bb740185918
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2562381
Auto-Submit: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71442}
2020-11-27 06:57:16 +00:00
Santiago Aboy Solanes
14c5b0ae67 [config] Add V8_NODISCARD for Scope classes
Scopes in V8 are used to guarantee one or more properties during its
lifetimes. If a scope is not named e.g MyClassScope(args) instead of
MyClassScope scope(args) it will get created and automatically destroyed
and therefore, being useless as a scope. This CL would produce a
compiling warning when that happens to ward off this developer error.

Follow-up to ccrev.com/2552415 in which it was introduced and
implemented for Guard classes.

Change-Id: Ifa0fb89cc3d9bdcdee0fd8150a2618af5ef45cbf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2555001
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71425}
2020-11-26 11:08:45 +00:00
Omer Katz
f8fa0edf16 cppgc: Fix and merge cppgc samples
Both sample are essentially the same up to string constants since
cppgc's default platform started using libplatform.
The only diff between the sample is whether we call
v8::V8::IntializePlatform or cppgc::InitializeProcess.

Drive-by: replace CPPGC_BUILD_IN_V8 with CPPGC_IS_STANDALONE which is
          more descriptive.

Bug: chromium:1056170
Change-Id: I8fdeb59c3345af77f1bccd8b93255ab39b4d3181
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2557516
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71421}
2020-11-26 09:12:35 +00:00
Michael Lippautz
e881304978 cppgc: Refactor write barriers
Refactor write barriers and split calls, as e.g. DijkstraWriteBarrier
also contained logic for recording slots (cards) for the young
generation.

The new API exposes the following:
- GetWriteBarrierType(): Retrieving the type of barrier that must be
  emitted;
- DijkstraWriteBarrier(), DijkstraWriteBarrierRange(): Dijkstra-style
  write barriers;
- SteeleWriteBarrier(): Steele-style write barrier;
- GenerationalBarrier(): Barrier for recording slots when using
  multiple generations;

Compilers running with -O3 optimize the DijkstraWriteBarrierPolicy
down to the same instructions as before the split.

Change-Id: If68839cc6357b2f568986c9ce8ca753b1e96a70a
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2557514
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71407}
2020-11-25 15:29:24 +00:00
Michael Lippautz
3b82f4c686 cppgc: Expose write barriers
Exposes an opaque handle for uniformly (cppgc and V8) referring to an
instance of a heap.

Exposes a set of raw write barriers for advances embedders through
subtle::HeapConsistency which is a mirror into write barrier internals.
The following barriers are exposed:
- DijkstraWriteBarrier: Regular Dijkstra-style write barrier (add to
  wavefront);
- DijkstraWriteBarrierRange: Same as DijkstraWriteBarrier but
  operating on a range of slots that are composite (inlined) objects;
- SteeleWriteBarrier: Regular Steele-style write barrier (retreating
  wavefront);

Change-Id: Ib5ac280204686bf887690f72df1cdb506ea6ef70
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2554601
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71381}
2020-11-24 17:41:11 +00:00
Georg Neis
3836aeb039 [cleanup] Replace all remaining Min/Max uses with std::min/max
Apart from removing Min and Max (utils.h), this is mostly a renaming.

In a few cases I had to add a cast. In a bunch of cases I had to use
initializer lists to force call-by-value for static member constants
because call-by-reference wouldn't compile (like in the previous CL).
In a few places I used initializer lists in place of nested min/max
operations.

Bug: v8:11074
Change-Id: I53a5411be6334ff41e7a8517e6b87fb46f14d086
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2545523
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71380}
2020-11-24 17:32:01 +00:00
Omer Katz
0e0d1b0d7c cppgc: Fix cppgc build
The CPPGC_BUILD_IN_V8 define (used for tracing) isn't propagated from
v8_base_without_compiler to cppgc_base, which breaks build with
perfetto. Instead use a gn args to specify standalone builds (defaulted
to false) and use that to choose the right tracing implementation.

Bug: chromium:1056170
Change-Id: I70bce819d45fb133b6f932a50a5d027e39f3e5b9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2555007
Auto-Submit: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71356}
2020-11-24 09:35:50 +00:00