The idea here is that in case the `thenable` is a JSPromise and `then`
is the initial `Promise.prototype.then` method, and the @@species lookup
chain is intact, we can skip creating the temporary promise and the
closures (with the shared context), and instead directly call into our
PerformPromiseThen. This is sound since - given above mentioned
conditions - our short-cut
PerformPromiseThen(thenable, undefined, undefined, promise_to_resolve)
is not observably different from the actual
resolve, reject = CreateResolvingFunctions(promise_to_resolve)
result_capability = NewPromiseCapability(%Promise%)
PerformPromiseThen(thenable, resolve, reject, result_capability)
except through PromiseHooks (and potentially via the async stack
traces). So we disable the fast-path if either promise hooks are enabled
or the debugger is active for now.
This improves the performance on the wikipedia benchmark by 20-25% and
the bluebird-doxbee benchmark by around 20%.
Bug: v8:7253
Change-Id: I23c92ad365c2b71d65057573f2d8febe2afe00b0
Reviewed-on: https://chromium-review.googlesource.com/911800
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51261}
This introduces dedicated builtins
- FulfillPromise,
- RejectPromise, and
- ResolvePromise,
which perform the corresponding operations from the language
specification, and removes the redundant entry points and the
excessive inlining of these operations into other builtins. We
also add the same logic on the C++ side, so that we don't need
to go into JavaScript land when resolving/rejecting from the
API.
The C++ side has a complete implementation, including full support
for the debugger and the current PromiseHook machinery. This is to
avoid constantly crossing the boundary for those cases, and to also
simplify the CSA side (and soon the TurboFan side), where we only
do the fast-path and bail out to the runtime for the general handling.
On top of this we introduce %_RejectPromise and %_ResolvePromise,
which are entry points used by the bytecode and parser desugarings
for async functions, and also used by the V8 Extras API. Thanks to
this we can uniformly optimize these in TurboFan, where we have
corresponding operators JSRejectPromise and JSResolvePromise, which
currently just call into the builtins, but middle-term can be further
optimized, i.e. to skip the "then" lookup for JSResolvePromise when
we know something about the resolution.
In TurboFan we can also already inline the default PromiseCapability
[[Reject]] and [[Resolve]] functions, although this is not as effective
as it can be right now, until we have inlining support for the Promise
constructor (being worked on by petermarshall@ right now) and/or SFI
based CALL_IC feedback.
Overall this change is meant as a refactoring without significant
performance impact anywhere; it seems to improve performance of
simple async functions a bit, but otherwise is neutral.
Bug: v8:7253
Change-Id: Id0b979f9b2843560e38cd8df4b02627dad4b6d8c
Reviewed-on: https://chromium-review.googlesource.com/911632
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51260}
This information is useful to know whom to assign bugs to when these tests are
crashing on our infrastructure.
R=petermarshall@chromium.org
No-Try: true
Change-Id: Ia165e0236602cae73e144011537d642e3535fa6b
Reviewed-on: https://chromium-review.googlesource.com/908563
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51259}
The next Fuchsia SDK roll changes the signature and types associated
with the zx_thread_read_state() API, so we temporarily need backward-
compatibility shims while we roll the SDK/Chromium/V8.
Bug: chromium:707030
Change-Id: I419a65bbb631a1ef0d7d5044b07d4cbbac08970f
Reviewed-on: https://chromium-review.googlesource.com/914695
Commit-Queue: Wez <wez@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51256}
This pretenuring was added in https://codereview.chromium.org/5220007,
back when it was necessary in order to allow use of the closure
as a "constant function" property. This should no longer be the case,
and the pretenuring causes some unfortunate downstream effects.
This patch removes the parser's setting of this bit. If it doesn't
cause regressions on the perf bots, followup CLs will remove the
rest of the support for this feature.
Bug: v8:7442
Change-Id: I27c43dd4293ce5de921be6c78571e712778d138a
Reviewed-on: https://chromium-review.googlesource.com/914610
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51254}
Most of the users of these api methods manually ensure that the returned
values are Strings. With an additional flag we can easily ensure that already
in V8 and avoid needless api roundtrips.
Bug: v8:7358
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I62165d44084abc9f07f5bdaace5105847edca60a
Reviewed-on: https://chromium-review.googlesource.com/901248
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51250}
This is a follow-up to https://chromium-review.googlesource.com/904662
as I forgot this callsite there. The perf tests still haven't recovered
from decreasing the worker count by 1 to account for main thread
(crbug.com/809961) and I assume this line is at fault.
If this is correct, it also indicates ConcurrentMarking as a great
area to focus since a single extra worker appears to be making a
significant difference.
R=mlippautz@chromium.org
Bug: chromium:809961, chromium:808028
Change-Id: I9df933a4193fb25ea4e857f589e2164c8a2859b4
Reviewed-on: https://chromium-review.googlesource.com/911670
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Gabriel Charette <gab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51249}
Implements the change outlined in https://github.com/tc39/ecma262/pull/890,
which has been ratified and pulled into the specification. In particular,
template callsite objects are no longer kept in a global, eternal Map, but
are instead associated with their callsite, which can be collected. This
prevents a memory leak incurred by TaggedTemplate calls.
Changes, summarized:
- Remove the TemplateMap and TemplateMapShape objects, instead caching
template objects in the feedback vector.
- Remove the `hash` member of TemplateObjectDescriptor, and the Equals
method (used by TemplateMap)
- Add a new FeedbackSlotKind (kTemplateObject), which behaves similarly
to FeedbackSlotKind::kLiteral, but prevents eval caching. This ensures
that a new feedback vector is always created for eval() containing tagged
templates, even when the CompilationCache is used.
- GetTemplateObject bytecode now takes a feedback index, and only calls
into the runtime if the feedback is Smi::kZero (uninitialized).
BUG=v8:3230, v8:2891
R=littledan@chromium.org, yangguo@chromium.org, bmeurer@chromium.org,
rmcilroy@chromium.org
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I7827bc148d3d93e2b056ebf63dd624da196ad423
Reviewed-on: https://chromium-review.googlesource.com/624564
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51248}
some time the output of these two could be the same
if machine is fast enough.
Change-Id: I1d9c0191657abae3d053517d45059065df2d44dc
Reviewed-on: https://chromium-review.googlesource.com/911873
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#51247}
According to the spec, if an imported function gets exported, the
exported function has to be identical to to imported function.
With this CL we initialize the list of potential js_wrappers_ with all
wasm function we imported. Therefore no new wrappers are generated for
these functions.
R=clemensh@chromium.org
Bug: v8:7364
Change-Id: Ibcd47d8fcc4c2fb5740d57ea547fbd01c2a4e80a
Reviewed-on: https://chromium-review.googlesource.com/901626
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51244}
This cleans up mb_config.pyl and strips it from:
- remaining gyp_defines entries and other mention of gyp
- all redundant 'gn_' prefixes and configs
These changes are possible after https://crrev.com/c/911073
Bug: chromium:772804
Change-Id: I702405cc97ef2cc14b2c2cc5870c8315dde8342a
Reviewed-on: https://chromium-review.googlesource.com/912830
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51243}
Currently, the LiftoffCompiler can bail out on unsupported
instructions, but the LiftoffAssembler can not. This makes it difficult
to iteratively implement the platform specific part of the assembler.
With this CL, also the assembler can bail out if an unimplemented
assembler method is called. This allows to test already implemented
methods.
R=ahaas@chromium.orgCC=sreten.kovacevic@mips.com
Bug: v8:6600
Change-Id: Ieb7abc2188266bb93c40fe55fd6ee0e5b1e0d220
Reviewed-on: https://chromium-review.googlesource.com/909390
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51242}
The corresponding gclient variables are set now via:
https://crrev.com/c/913368
Bug: chromium:772804
Change-Id: I9c96bde3e6cc88d84a320c00d3316a91c48749f7
Reviewed-on: https://chromium-review.googlesource.com/913351
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51240}
The test is slower on msan than its own anticipated runtime, which the test
internally measures.
TBR=danno@chromium.org
NOTRY=true
Bug: v8:7439
Change-Id: Iba08f589697bcf17b1f4d2cedb1313ff9a34c082
Reviewed-on: https://chromium-review.googlesource.com/913468
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51239}
When collecting stack frame information during a profiler tick event, we
apply a filter on the instructions at the current pc to avoid collecting
(wrong) stack frames while a frame is being setup/torn down. While this
detection makes sense for compiled JavaScript code, it also filters out
ticks in the C++ code base of v8.
This change only applies the filter if the pc lies within a region that
could potentially contain compiled JavaScript code.
Change-Id: I8c8d8d70823abcdc2c5ae0ebf78a5198ec855a79
Reviewed-on: https://chromium-review.googlesource.com/912470
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51238}
This reverts commit 9808093ef6.
Reason for revert:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/19149
Original change's description:
> Update test configurations for code serializer
>
> Update test configurations on the bots to test for serializing
> after execute (--cache=after-execute) and producing full code
> cache (--cache=full-code-cache) options. We no longer need
> to test serializing before execute (--cache=code) on the bots.
>
> Bug: v8:7302
> Change-Id: I123b07028d9231f6da6145b72b62b9ee31352388
> Reviewed-on: https://chromium-review.googlesource.com/869931
> Commit-Queue: Mythri Alle <mythria@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#51235}
TBR=machenbach@chromium.org,yangguo@chromium.org,mythria@chromium.org
Change-Id: I47e03101804194c21b0edf418b744b0ccb66cbf6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7302
Reviewed-on: https://chromium-review.googlesource.com/913134
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51236}
Update test configurations on the bots to test for serializing
after execute (--cache=after-execute) and producing full code
cache (--cache=full-code-cache) options. We no longer need
to test serializing before execute (--cache=code) on the bots.
Bug: v8:7302
Change-Id: I123b07028d9231f6da6145b72b62b9ee31352388
Reviewed-on: https://chromium-review.googlesource.com/869931
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51235}
This was removed on the infra side:
https://crrev.com/c/912831TBR=sergiyb@chromium.org
Bug: chromium:772804
Change-Id: Icf0a33c2c1294edbc957c7e0e4aa78268997ae10
Reviewed-on: https://chromium-review.googlesource.com/913210
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51233}
Adds a function to call Builtins::kToObject returning a JSReceiver.
Also changes all previous uses of CallBuiltin(Builtins:kToObject to use
it.
Also fixed a case in builtins-object-gen.cc, where the result of
ToObject is cast (unchecked so it doesn't crash) to a JSObject before
actually checking it is a JSObject.
Change-Id: I3b1ff50babc3b3cbf44d56970099d105f7a66d34
Reviewed-on: https://chromium-review.googlesource.com/906778
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51232}
Apparently the fuzzer tries to create functions with more 130000
parameters, which is too much for TurboFan. For returns I use the
wasm limit because only wasm uses multiple returns.
R=clemensh@chromium.org
Bug: chromium:811070
Change-Id: Ib9a55439c1da8e82ef5f35ffb2e79cab8d4a9018
Reviewed-on: https://chromium-review.googlesource.com/913268
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51231}
Before doing an indirect call, we always have to call {PrepareCall}.
Thus move this code out into platform-independent code. This also
slightly simplifies the API for {CallIndirect}.
R=ahaas@chromium.org
Bug: v8:6600
Change-Id: Id88ae5a9e73d1b6526131a5789205eda12b660de
Reviewed-on: https://chromium-review.googlesource.com/911369
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51230}
Moves generation of speculation poison to be based on the PC target vs the
actual PC being executed. The speculation poison is generated in the prologue
of the generated code if CompilationInfo::kGenerateSpeculationPoison is set.
The result is stored in a known register, which can then be read using the
SpeculationPoison machine node.
Currently we need to ensure the SpeculationPoison node is scheduled right after
the code prologue so that the poison register doesn't get clobbered. This is
currently not verified, however it's only use is in RawMachineAssembler where
it is manually scheduled early.
The Ignition bytecode handlers are updated to use this speculation poison
rather than one generated by comparing the target bytecode.
BUG=chromium:798964
Change-Id: I2a3d0cfc694e88d7a8fe893282bd5082f693d5e2
Reviewed-on: https://chromium-review.googlesource.com/893160
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51229}
This fixes a bug which causes the call count to change when
changing the speculation mode.
Bug: v8:7127
Change-Id: Icb43bd9ac392a5be4df154cb1e5cd4365013efc4
Reviewed-on: https://chromium-review.googlesource.com/911575
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51227}
d8's fragile path manipulation code requires that backslashes are
replaced with slashes before further processing. NormalizePath() is
the function that does this, and it's called in almost all the
required cases. But because of Clusterfuzz runs tests with
an absolute URL on the commandline, there was one case that
slipped through. This patch closes that gap.
No test added since this only reproduces under Clusterfuzz, not
in running mjsunit tests.
Bug: chromium:784012
Change-Id: Ie699e93ff1acb79edfe25ce59d576e9f7bd8c022
Reviewed-on: https://chromium-review.googlesource.com/912325
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51224}
This is a purely cosmetic change. Rename all local variables and
parameters of type CallDescriptor* to "call_descriptor".
For locals that are now named "call_descriptor", use auto upon
initialization, following the Google style guide
(https://google.github.io/styleguide/cppguide.html#auto).
Note: fields in structs and classes were not renamed in this CL.
R=clemensh@chromium.org,mstarzinger@chromium.org,jarin@chromium.org
Change-Id: Ic6f7afdba12f7b97741b098a9d0e0f58c41c587e
Reviewed-on: https://chromium-review.googlesource.com/909866
Commit-Queue: Ben Titzer <titzer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51223}
Extend the current OOB support for typed arrays to also handle the
negative integer indices in the fast-path. This is safe because in
ECMAScript we never look up integer indexed properties (including
negative indices) on typed arrays in the prototype chain.
This reduces the performance cliff shown in the benchmark on the
relevant bug from
console.timeEnd: Runtime deopt, 596.185000
console.timeEnd: Runtime deopt, 1444.289000
console.timeEnd: Runtime deopt, 1445.191000
console.timeEnd: Runtime deopt, 1443.008000
to
console.timeEnd: Runtime deopt, 590.017000
console.timeEnd: Runtime deopt, 784.899000
console.timeEnd: Runtime deopt, 792.428000
console.timeEnd: Runtime deopt, 786.740000
which corresponds to a 2x improvement overall. It's not for free,
especially not in this benchmark, but the cliff isn't as bad as
it was previously.
Bug: v8:7027
Change-Id: Icf8a7ee87bb7ebc54f82c1b9166fc5e78c12bc0e
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/911574
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51222}
This refactors the instruction cache simulation to now be maintained
process-wide (as opposed to be per Isolate). It prepares for allowing
to share code between Isolates (e.g. WebAssembly or shared builtins)
while still allowing to simulate execution of such shared code.
R=clemensh@chromium.org
Change-Id: I5a6f083f4e32597565dc646f13b4445014c0daaa
Reviewed-on: https://chromium-review.googlesource.com/909130
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51219}
This avoids the ambiguous implicit conversion C++ compile
errors we had to fix with static_cast before.
Change-Id: I4247f617740f2b6d14d9588a902e0e25029a6726
Reviewed-on: https://chromium-review.googlesource.com/911629
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51217}
Add support for retrieving i64 parameters and returning them from a
liftoff function.
R=ahaas@chromium.org
Bug: v8:6600
Change-Id: I407b6e3cde6967bacc59d8c3a54e0d5798164d18
Reviewed-on: https://chromium-review.googlesource.com/909215
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51214}
We don't need to generate TypedArraySpeciesCreate code for each type
case because TypedArraySpeciesCreate also handles each case, so it
generates duplicated codes. Thus, create a result object once before
switching to each type case. Also, replace ToNumber with
ToNumber_Inline.
This CL saves about 8000 bytes of generated code size.
Change-Id: I014535b0ef4b3d2a50a37cdc2b6cb4e83f6c2f17
Reviewed-on: https://chromium-review.googlesource.com/910755
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51213}
Fix 8238562b60
Requirement that the address is stored kJavaScriptCallCodeStartRegister
caused failures on MIPSR6, because of R6 optimization which doesn't load
the address in kJavaScriptCallCodeStartRegister.
Change-Id: If05d8bfe8601288b10fc65cca77664fe9638bbe9
Reviewed-on: https://chromium-review.googlesource.com/910851
Reviewed-by: Miran Karić <miran.karic@mips.com>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#51212}
