Furthermore avoid lock-step between pointer updating phases as they
should execute in parallel without synchronization restrictions.
This reverts commit bc6adb868d.
Bug: chromium:726040
Change-Id: I1713d4333f0ce1604ff51c02461f3ef91e4bdaed
Reviewed-on: https://chromium-review.googlesource.com/521062
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45657}
On left trimming the main thread ensures that the array
is black before changing its map and length.
The concurrent marker snapshots the length of the array
and then tries to change its color to black. If the change
is successful, then the array is iterated using the saved
length.
BUG=chromium:694255
Change-Id: Ib06c1c9c3240ace56c1897e5a73462aa447d41f5
Reviewed-on: https://chromium-review.googlesource.com/519323
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45656}
Based on past discussions I'm going to try to reland this change. This makes window.document and document behave the same after navigation, which is a change from what the spec says. If this works out though, it would greatly simplify the spec; and fix the fact that currently it's leaking the underlying global object, which we don't want for security and object-identity reasons.
Bug: chromium:713732
Change-Id: I835ef510fc78f04c602434a7cec6420e027c4012
Reviewed-on: https://chromium-review.googlesource.com/520764
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45654}
On ia32, AssembleMove used to emit different code depending on whether
the to-be-moved heap object is in new space or not. This may have been
necessary in the past but is no longer. Moreoever, it's incompatible
with running off-thread. With this CL, we don't do the new-space check
and just emit a mov.
R=mstarzinger@chromium.org
Bug: v8:6048
Change-Id: I93abd61a5f290311a431edee3d4fa0a240d52085
Reviewed-on: https://chromium-review.googlesource.com/519248
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45653}
Use relaxed reads to allow changing the pointer concurrently in the
GC. The layout descriptor will either be fast and there's nothing
to be done, or it will be slow, and we will use the forwarding
pointer to determine the proper version to use.
Bug: chromium:726040
Change-Id: I0a376752c3a99abf0874070387fcaeb3cee0dcb2
Reviewed-on: https://chromium-review.googlesource.com/519346
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45652}
Switch to use Win32 CONDITION_VARIABLE like Chromium.
This greatly simplifies the implementation of ConditionVariable
class for Windows with better performance.
Bug:NO
Change-Id: Iea5e5cb80520a966aeb687bebb4b5256396cb13b
Reviewed-on: https://chromium-review.googlesource.com/519542
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Loo Rong Jie <loorongjie@gmail.com>
Cr-Commit-Position: refs/heads/master@{#45651}
Visitor id for JSObjects does not depend on the instance size.
BUG=chromium:694255
Change-Id: I6b4b559207609f4a4c19373572be6692a55c5187
Reviewed-on: https://chromium-review.googlesource.com/520763
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45650}
This fixes the counter inconsistencies while leaving the memory in an
inaccessible state.
Bug: chromium:724947
Change-Id: I431eb6fda84922a52dfb9380c6b482ada55bccee
Reviewed-on: https://chromium-review.googlesource.com/519164
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45647}
Furthermore avoid lock-step between pointer updating phases as they
should execute in parallel without synchronization restrictions.
This reverts commit 68a723996b.
Bug: chromium:726040
Change-Id: I76bb31d146f8aa20f8b7c486eeae9f09efa0cd53
Reviewed-on: https://chromium-review.googlesource.com/518150
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45644}
When checking {const char*} (or similar) against each other, don't
print them as c strings on failure. Just print the pointer value.
In wasm, where we use byte pointers into wasm wire bytes, this was
sometimes hiding check failures behind segfaults which happened when
trying to output invalid pointers as c strings.
Anyway, it's more useful to see the raw pointer values in these cases.
Other use cases, where we really compare against c string pointers
should be rare in our code base.
R=ishell@chromium.org
Change-Id: I92a13221d18c987a97cf2a29ac8f454178ff2bb5
Reviewed-on: https://chromium-review.googlesource.com/517166
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45642}
DebugInfo was very closely tied to break point support:
* It contained only information relevant to break points.
* It was created and freed by break point implementation.
* Existence of a DebugInfo on the shared function info implied existence of
break points.
This CL is a step towards making DebugInfo usable by other debugging
functionality such as block coverage by decoupling it from break point support,
which is now only one kind of information stored on the DebugInfo object.
BUG=v8:6000
Review-Url: https://codereview.chromium.org/2909893002
Cr-Commit-Position: refs/heads/master@{#45640}
Most prototype implementations are not fully supported in the
interpreter. This is the case at least for exception handling, simd, and
atomics. Any function can be redirected to the interpreter though,
either by passing --wasm-interpret-all, or by dynamically redirecting to
the interpreter for debugging.
Making the flags experimental keeps the fuzzer from playing around with
these flags.
Drive-by: Refactor tests which explicitly set the prototype flag to use
a new scope for that.
R=ahaas@chromium.org
BUG=chromium:727584
Change-Id: I67da79f579f1ac93c67189afef40c6524bdd4430
Reviewed-on: https://chromium-review.googlesource.com/519402
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45639}
V8 provides ScriptCompiler::CompileFunctionInContext method which takes expression and compile it as anonymous function like (function() .. expression ..). To produce correct locations for stmts inside of this expression V8 compile this function with negative offset. Instead of stmt position blackboxing use function start position which is negative in described case.
Bug: chromium:705963
Change-Id: I86b113198fb59e77b3bbf523c8cd943e22f8a6ca
Reviewed-on: https://chromium-review.googlesource.com/519384
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45637}
Instead of allocating and embedding certain heap numbers into the code
during code assembly, emit dummies but record the allocation requests.
Later then, in Assembler::GetCode, allocate the heap numbers and patch
the code by replacing the dummies with the actual objects. The
RelocInfos for the embedded objects are already recorded correctly when
emitting the dummies.
R=jarin@chromium.org
BUG=v8:6048
Review-Url: https://codereview.chromium.org/2900683002
Cr-Commit-Position: refs/heads/master@{#45635}
This reverts commit c5aad5f284
The CL was reverted due to missing Chromium dependencies.
This commit removes the simulator trace-based tests, and the associated header file dependencies, previously pulled in by DEPS. The NEON support now has only hand-written tests, in test-assembler-arm64.cc. The remaining tests can be added in a later patch.
BUG=chromium:718439
Original issue's description:
> Reland "ARM64: Add NEON support"
>
> This reverts commit cc047635ff.
> The CL was reverted due to a missing DEPS mirror.
>
> Original issue's description:
> > ARM64: Add NEON support
> >
> > Add assembler, disassembler and simulator support for NEON in the ARM64 backend.
> >
> > BUG=
> >
> > Review-Url: https://codereview.chromium.org/2622643005
> > Cr-Commit-Position: refs/heads/master@{#44306}
>
> BUG=
>
> Review-Url: https://codereview.chromium.org/2812573003
> Cr-Commit-Position: refs/heads/master@{#44652}
Review-Url: https://codereview.chromium.org/2896303003
Cr-Commit-Position: refs/heads/master@{#45633}
Chromium dropped this a while back. This'll prepare switching the bot to GN.
NOTRY=true
Bug: chromium:726584
Change-Id: I55d7ef7ae33b66c1ca6721acba018aa19438e2da
Reviewed-on: https://chromium-review.googlesource.com/519404
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45631}
This removes any kind of heap access from the asm.js validator internals
and hence makes it independent of a specific Isolate. It is a precursor
towards potentially being able to run validation while streaming.
R=clemensh@chromium.org
Change-Id: Ia3770bf03bb973b56de897b27be60d7e050af2c4
Reviewed-on: https://chromium-review.googlesource.com/518188
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45628}
Bug: v8:6048
Change-Id: I1fbea87f6b7cb48c8f57532238475f2c17c863fb
Reviewed-on: https://chromium-review.googlesource.com/519267
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45627}
Black allocation is switched on at the start of incremental marking
if concurrent marking is enabled.
New space objects in the allocation area are handled by the main thread.
BUG=chromium:694255
Change-Id: I694affe11b95f51e2fe79563b2b048aaef982c03
Reviewed-on: https://chromium-review.googlesource.com/518862
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45626}
In current implementation in expressions like await foo() we have break location right after foo call and before actual await.
And we additionally have a lot of other statement locations because of do scope.
Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call.
Bug: v8:6425,v8:6162
Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644
Reviewed-on: https://chromium-review.googlesource.com/514046
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45625}
Causes crashes on canary if there is a GC and the value makes it onto
the stack.
Bug: chromium:727662
Change-Id: I44fa8cf8a83b43d64418896c0a1f5518401b454f
Reviewed-on: https://chromium-review.googlesource.com/519302
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45623}
... to properly handle stack overflows near the hard stack limit.
Bug: chromium:716522
Change-Id: I6acdb29f039b9835bdf45b087d6561a05ed837bb
Reviewed-on: https://chromium-review.googlesource.com/517799
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45619}
The assertion was too strict, not matching the check in JSTypedArray::Create.
Delete the TODO because the code does not actually rely on the assertion for safety: EmitElementStore always performs a length check.
Drive-by-fix: KeyedAccessStoreMode::STANDARD_STORE is equally safe and does one comparison less.
Bug: chromium:724889
Change-Id: I988a4eb6ad36d35143a008f7289b075f5c05e7ed
Reviewed-on: https://chromium-review.googlesource.com/517102
Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45617}
- Enable aggressive lazy inner funcs (make non-declaration funcs lazy, ie let f =
function() { ... } when --experimental-preparser-scope-analysis is on.
- Turn on variable tracking for lazy top level functions: this makes their inner
functions skippable.
- Test fix for an testing bug uncovered by this work: when restoring the data
for the relevant scope, don't assume it's the outermost scope for which we
have data.
- Fix: if we abort lazy parsing a function, we shouldn't produce any data for
it.
BUG=v8:5516
Change-Id: I0606fbabb5886dc57dbb53ab5f3fb894ff5d032e
Reviewed-on: https://chromium-review.googlesource.com/518165
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45615}
- introduced session id, which fixes an issue of reconnect while evaluating;
- forEachContext provides a safe way to iterate over contexts in a group.
BUG=chromium:590878
Review-Url: https://codereview.chromium.org/2905543004
Cr-Commit-Position: refs/heads/master@{#45613}
Retrieve length from the buffer instead of storing in as value in the
map.
This reverts commit a73323d367.
Bug:
Change-Id: I2f17b1b121380ec3d70f42d7cd0015720d6dc7d1
Reviewed-on: https://chromium-review.googlesource.com/518132
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45611}
In TurboFan the ArchDebugBreak opcode is not used for debugging but to
force a crash in unreachable or unimplemented code path. The opcode was
marked as having no side effects allowing the scheduler to bring it "up"
with unfortunate consequences.
This patch also update the behaviour of assembler::debug when not using
the simulator.
Review-Url: https://codereview.chromium.org/2901383004
Cr-Commit-Position: refs/heads/master@{#45608}
