The file formerly known as src/js/harmony-async-await.js does not
expose anything directly to JavaScript code; it just makes a few
functions available on the native context for the parser desugaring
to expand into. Experimental natives have various issues with
larger amounts of code, so this patch moves the JS builtins to
support async functions out of experimental natives and into the
core snapshot. The change would be done eventually anyway, but this
patch does it before removing the flag to support shipping the
feature while avoiding the pitfalls of experimental natives.
Drive by cleanup: remove more unused functions from the whitelist for experimental natives.
BUG=v8:5427,v8:4483
Review-Url: https://codereview.chromium.org/2365123002
Cr-Commit-Position: refs/heads/master@{#39706}
This patch tracks the stack of async functions differently from other
Promise async stack tracking. With this patch, the stack trace of a
callstack of async functions should look similarly to the call stack
if all of the functions were synchronous. An example can be found in
the updated test expectations: https://codereview.chromium.org/2362923002 .
The new stack traces are implemented using existing mechanisms in the
inspector. The inspector has two ways to save async stack traces: recurring
and non-recurring stacks. An example of a non-recurring stack is setTimeout,
and a recurring one is saved for setInterval. Recurring stacks are deleted
only when a special "cancel" function is called, rather than being deleted
after being used the first time. Previous Promise async stack tracking always
used non-recurring stacks.
For async functions, this patch saves a recurring stack. The top frame of
the stack is duplicated, as the resuming function contains a similar frame;
the devtools frontend is responsible for removing or marking this frame,
which it can do based on seeing the [async function] line which follows it.
The second frame will instead be provided by the resuming execution
context. The recurring stack is saved when the async function is entered, and
it is deleted from a finally block. The id of the stack is saved in the outer
Promise being constructed by the async function. When an intermediate
throwaway Promise will be triggered as a reaction, it will be identified as
such based on its debugging metadata, and the corresponding async function's
recurring stack will be used.
BUG=v8:4483
Review-Url: https://codereview.chromium.org/2357423002
Cr-Commit-Position: refs/heads/master@{#39695}
This matches current Crankshaft/fullcodegen behavior more closely and
thus reduces the chances that we run into unnecessary polymorphism due
to the field representation tracking in our object model.
R=jarin@chromium.org
BUG=v8:5267
Committed: 6a939714e9
Review-Url: https://codereview.chromium.org/2367593003
Cr-Commit-Position: refs/heads/master@{#39692}
- Add a new container object to store the data required for
PromiseResolveThenableJob.
- Create a new runtime function to enqueue the microtask event with
the required data.
This patches causes a 4% regression in the bluebird benchmark.
BUG=v8:5343
Review-Url: https://codereview.chromium.org/2314903004
Cr-Commit-Position: refs/heads/master@{#39571}
To improve performance, this patch makes Promise.all and Promise.race not
perform correct catch prediction when the debugger is not open. The case
may come up if Promise.race or Promise.all is called, then DevTools is
open, then a component Promise is rejected. In this case, the user would
falsely get an exception event even if the "pause on caught exceptions"
box is unchecked. There are tests which triggered this case; however, it
seems both unlikely and and acceptable to have an event in this case.
Many analogous events are already produced when DevTools is enabled
during the operation of a program.
BUG=v8:3093
Review-Url: https://codereview.chromium.org/2350363002
Cr-Commit-Position: refs/heads/master@{#39565}
This patch knits together Promises returned by async/await such that when
one async function awaits the result of another one, catch prediction works
across the boundaries, whether the exception comes synchronously or
asynchronously. Edges are added in three places:
- When a locally uncaught await happens, if the value passed into await
is a Promise, from the awaited value to the Promise under construction
in the broader async function
- From a "throwaway" Promise, which may be found on the Promise debug
stack, to the Promise under construction in the async function that
surrounds it
- When a Promise is resolved with another Promise (e.g., when returning a
Promise from an async function)
In this reland, the caught tests are broken up into four parts to avoid
timeouts.
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2346363004
Cr-Commit-Position: refs/heads/master@{#39564}
Reason for revert:
Need to break up test into smaller tests to avoid timeouts
Original issue's description:
> Async/await Promise dependency graph
>
> This patch knits together Promises returned by async/await such that when
> one async function awaits the result of another one, catch prediction works
> across the boundaries, whether the exception comes synchronously or
> asynchronously. Edges are added in three places:
> - When a locally uncaught await happens, if the value passed into await
> is a Promise, from the awaited value to the Promise under construction
> in the broader async function
> - From a "throwaway" Promise, which may be found on the Promise debug
> stack, to the Promise under construction in the async function that
> surrounds it
> - When a Promise is resolved with another Promise (e.g., when returning a
> Promise from an async function)
>
> BUG=v8:5167
>
> Committed: https://crrev.com/7265fdde7c76b9f875b40b0b139515936d491d64
> Cr-Commit-Position: refs/heads/master@{#39522}
TBR=adamk@chromium.org,jgruber@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2351953002
Cr-Commit-Position: refs/heads/master@{#39523}
This patch knits together Promises returned by async/await such that when
one async function awaits the result of another one, catch prediction works
across the boundaries, whether the exception comes synchronously or
asynchronously. Edges are added in three places:
- When a locally uncaught await happens, if the value passed into await
is a Promise, from the awaited value to the Promise under construction
in the broader async function
- From a "throwaway" Promise, which may be found on the Promise debug
stack, to the Promise under construction in the async function that
surrounds it
- When a Promise is resolved with another Promise (e.g., when returning a
Promise from an async function)
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2317383002
Cr-Commit-Position: refs/heads/master@{#39522}
This patch closes a memory leak in async/await where the desugaring
was creating a situation analagous to that described in v8:5002.
Intermediate Promises were being kept alive, so a long-running loop
would cause linear memory usage on the heap. This patch returns
undefined to the 'then' callback passed into PerformPromiseThen
in order to avoid this hazard. Test expectations are fixed to remove
expecting extraneous events which occurred on Promises that are
now not given unnecessarily complex resolution paths before being
thrown away.
This patch is a reland; originally, tests which exercised the memory
exhaustion were checked in. Although it's possible to find good parameters
for running such tests locally, it is difficult to automate the tests
between the rock of timeouts and the hard place of too-small heaps
causing memory exhaustion in some modes even when there is no leak.
BUG=v8:5390
Review-Url: https://codereview.chromium.org/2352933002
Cr-Commit-Position: refs/heads/master@{#39520}
Reason for revert:
Still causes issues on bot (sometimes!)
Original issue's description:
> Reland of Fix async/await memory leak (patchset #1 id:1 of https://codereview.chromium.org/2354473002/ )
>
> Reason for revert:
> Relanding with faster-running test
>
> Original issue's description:
> > Revert of Fix async/await memory leak (patchset #5 id:80001 of https://codereview.chromium.org/2334323006/ )
> >
> > Reason for revert:
> > newly introduced test async-await-loop times out: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/10894/steps/Ignition%20-%20turbofan%20%28flakes%29/logs/async-await-loop
> >
> > Original issue's description:
> > > Fix async/await memory leak
> > >
> > > This patch closes a memory leak in async/await where the desugaring
> > > was creating a situation analagous to that described in v8:5002.
> > > Intermediate Promises were being kept alive, so a long-running loop
> > > would cause linear memory usage on the heap. This patch returns
> > > undefined to the 'then' callback passed into PerformPromiseThen
> > > in order to avoid this hazard. Test expectations are fixed to remove
> > > expecting extraneous events which occurred on Promises that are
> > > now not given unnecessarily complex resolution paths before being
> > > thrown away.
> > >
> > > BUG=v8:5390
> > >
> > > Committed: https://crrev.com/a0ba18e9634c5e2d439033ab61a77cff54f9af35
> > > Cr-Commit-Position: refs/heads/master@{#39479}
> >
> > TBR=adamk@chromium.org,caitp@igalia.com,littledan@chromium.org
> > NOTRY=true
> > BUG=v8:5390
> >
> > Committed: https://crrev.com/196db1999da130019bbf8e3bd65977f840e8afaf
> > Cr-Commit-Position: refs/heads/master@{#39493}
>
> TBR=adamk@chromium.org,caitp@igalia.com,hablich@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> BUG=v8:5390
>
> Committed: https://crrev.com/e51482f01f26e0013e6377e85c4d2c41900e403c
> Cr-Commit-Position: refs/heads/master@{#39508}
TBR=adamk@chromium.org,caitp@igalia.com,hablich@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5390
Review-Url: https://codereview.chromium.org/2348403003
Cr-Commit-Position: refs/heads/master@{#39512}
Reason for revert:
Relanding with faster-running test
Original issue's description:
> Revert of Fix async/await memory leak (patchset #5 id:80001 of https://codereview.chromium.org/2334323006/ )
>
> Reason for revert:
> newly introduced test async-await-loop times out: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/10894/steps/Ignition%20-%20turbofan%20%28flakes%29/logs/async-await-loop
>
> Original issue's description:
> > Fix async/await memory leak
> >
> > This patch closes a memory leak in async/await where the desugaring
> > was creating a situation analagous to that described in v8:5002.
> > Intermediate Promises were being kept alive, so a long-running loop
> > would cause linear memory usage on the heap. This patch returns
> > undefined to the 'then' callback passed into PerformPromiseThen
> > in order to avoid this hazard. Test expectations are fixed to remove
> > expecting extraneous events which occurred on Promises that are
> > now not given unnecessarily complex resolution paths before being
> > thrown away.
> >
> > BUG=v8:5390
> >
> > Committed: https://crrev.com/a0ba18e9634c5e2d439033ab61a77cff54f9af35
> > Cr-Commit-Position: refs/heads/master@{#39479}
>
> TBR=adamk@chromium.org,caitp@igalia.com,littledan@chromium.org
> NOTRY=true
> BUG=v8:5390
>
> Committed: https://crrev.com/196db1999da130019bbf8e3bd65977f840e8afaf
> Cr-Commit-Position: refs/heads/master@{#39493}
TBR=adamk@chromium.org,caitp@igalia.com,hablich@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
BUG=v8:5390
Review-Url: https://codereview.chromium.org/2348403002
Cr-Commit-Position: refs/heads/master@{#39508}
Reason for revert:
newly introduced test async-await-loop times out: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/10894/steps/Ignition%20-%20turbofan%20%28flakes%29/logs/async-await-loop
Original issue's description:
> Fix async/await memory leak
>
> This patch closes a memory leak in async/await where the desugaring
> was creating a situation analagous to that described in v8:5002.
> Intermediate Promises were being kept alive, so a long-running loop
> would cause linear memory usage on the heap. This patch returns
> undefined to the 'then' callback passed into PerformPromiseThen
> in order to avoid this hazard. Test expectations are fixed to remove
> expecting extraneous events which occurred on Promises that are
> now not given unnecessarily complex resolution paths before being
> thrown away.
>
> BUG=v8:5390
>
> Committed: https://crrev.com/a0ba18e9634c5e2d439033ab61a77cff54f9af35
> Cr-Commit-Position: refs/heads/master@{#39479}
TBR=adamk@chromium.org,caitp@igalia.com,littledan@chromium.org
NOTRY=true
BUG=v8:5390
Review-Url: https://codereview.chromium.org/2354473002
Cr-Commit-Position: refs/heads/master@{#39493}
This patch implements a bug fix to the async/await specification described
at https://github.com/tc39/ecma262/pull/692#issuecomment-247488411
Namely, the intermediate values of Promises may be rejected, and they do
not have .then called on them anymore (now that the memory leak is fixed),
but they do not correspond do unhandled rejections. This change has been
tested manually with integration with Blink; once it is checked in and
rolled, then further tests can be added on the Blink side for the uncaught
rejection handler and async/await.
BUG=v8:4483
Review-Url: https://codereview.chromium.org/2338273007
Cr-Commit-Position: refs/heads/master@{#39480}
This patch closes a memory leak in async/await where the desugaring
was creating a situation analagous to that described in v8:5002.
Intermediate Promises were being kept alive, so a long-running loop
would cause linear memory usage on the heap. This patch returns
undefined to the 'then' callback passed into PerformPromiseThen
in order to avoid this hazard. Test expectations are fixed to remove
expecting extraneous events which occurred on Promises that are
now not given unnecessarily complex resolution paths before being
thrown away.
BUG=v8:5390
Review-Url: https://codereview.chromium.org/2334323006
Cr-Commit-Position: refs/heads/master@{#39479}
Reason for revert:
With fixes for frozen RegExps in https://codereview.chromium.org/2339443002 , it should be web-compatible to put RegExps in strict mode again, per spec.
Original issue's description:
> Revert of Put RegExp js code in strict mode (patchset #2 id:20001 of https://codereview.chromium.org/1776883005/ )
>
> Reason for revert:
> Found to break SAP Web IDE, and these semantics are not shipped in any other browser.
> Revert to legacy semantics while assessing web compatibility.
>
> BUG=chromium:624318
>
> Original issue's description:
> > Put RegExp js code in strict mode
> >
> > src/js/regexp.js was one of the few files that was left in sloppy
> > mode. The ES2017 draft specification requires that writes to
> > lastIndex throw when the property is non-writable, and test262
> > tests enforce this behavior. This patch puts that file in strict
> > mode.
> >
> > BUG=v8:4504
> > R=yangguo@chromium.org
> > LOG=Y
> >
> > Committed: https://crrev.com/80b1b2a45bbd9bf3d08e4e6516acfaaa8f438213
> > Cr-Commit-Position: refs/heads/master@{#34801}
>
> TBR=yangguo@chromium.org,adamk@chromium.org
>
> Committed: https://crrev.com/34880eb3dcf7492d44c0a3b45b6c888189f2c3c3
> Cr-Commit-Position: refs/heads/master@{#37449}
TBR=adamk@chromium.org,yangguo@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:624318
Review-Url: https://codereview.chromium.org/2344773002
Cr-Commit-Position: refs/heads/master@{#39456}
This flag has been flipped off since 52, so it is due for removal.
R=adamk@chromium.org,caitp@igalia.com
BUG=v8:3785
CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_noi18n_rel_ng
Review-Url: https://codereview.chromium.org/2268633002
Cr-Commit-Position: refs/heads/master@{#39435}
RegExpSubclassExecJS and RegExpExecJS only differed in the additional
TO_BOOLEAN on global and sticky flags and the useless (i < 0) check.
R=littledan@chromium.org
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2337923002
Cr-Commit-Position: refs/heads/master@{#39417}
Handle some examples of the "asynchronous case" by marking await expressions
as either caught or uncaught; in the caught case, this marks the Promise passed
in as having a catch predicted. The marking is done in AST numbering, which
chooses between two different runtime function calls based on catch prediction.
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2276243002
Cr-Commit-Position: refs/heads/master@{#39394}
Reason for revert:
Tests fail when i18n is switched off, trybots do not run this configuration
Original issue's description:
> [builtins] Move StringNormalize to a cpp builtin.
>
> BUG=v8:5364
>
> Committed: https://crrev.com/7f84a6a2e7000bebba49354b4648346ff606ca34
> Cr-Commit-Position: refs/heads/master@{#39331}
TBR=bmeurer@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5364
Review-Url: https://codereview.chromium.org/2335553002
Cr-Commit-Position: refs/heads/master@{#39332}
This patch fixes a bunch of out-of-date TODOs, un-skips some tests
and refers to appropriate bug numbers and current specification
status where appropriate.
R=adamk
Review-Url: https://codereview.chromium.org/2319203002
Cr-Commit-Position: refs/heads/master@{#39260}
Migrate the isNaN, isFinite, Number.isFinite, Number.isInteger,
Number.isSafeInteger and Number.isNaN predicates to TurboFan
builtins and make them optimizable (for certain input types) in
JavaScript callees being optimized by TurboFan. That means both
the baseline and the optimized version is now always at maximum,
consistent performance. Especially TurboFan suffered from poor
baseline (and optimized) performance because it cannot play the
same weird tricks that Crankshaft plays for %_IsSmi.
This also adds a bunch of new tests to properly cover the use
of the Harmony predicates in optimized code.
R=franzih@chromium.org
BUG=v8:5049,v8:5267
Review-Url: https://codereview.chromium.org/2313073002
Cr-Commit-Position: refs/heads/master@{#39242}
Spec discussion: https://github.com/tc39/ecma402/issues/30
It's in stage 4 and Firefox has already implemented it.
For now, it's added to HARMONY_IN_PROGRESS bucket behind
'--datetime-format-to-parts' flag.
BUG=v8:5244
TEST=intl/date-format/date-format-to-parts.js
TEST=test262/intl402/DateTimeFormat/prototype/formatToParts/*
Review-Url: https://codereview.chromium.org/2273953003
Cr-Commit-Position: refs/heads/master@{#39225}
Prior to 69debbb50c, InstallGetterSetter
was bugged and ignored all passed attributes, installing as DONT_ENUM
instead. This commit makes sure we match old behavior now that that bug
is fixed.
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2316513003
Cr-Commit-Position: refs/heads/master@{#39191}
Reason for revert:
Performance regressions: crbug.com/644087
Clusterfuzz: crbug.com/644074
We'll reland all regexp changes at once when the port is complete and at least performance-neutral, since the partial port requires slow workarounds.
Original issue's description:
> [regexp] Port RegExpConstructor
>
> BUG=v8:5339
>
> Committed: https://crrev.com/0aa80be16b8d876999066545c2922e1291e09610
> Cr-Commit-Position: refs/heads/master@{#39074}
TBR=bmeurer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2312743002
Cr-Commit-Position: refs/heads/master@{#39177}
Reason for revert:
Performance regressions: crbug.com/644087
Clusterfuzz: crbug.com/644074
We'll reland all regexp changes at once when the port is complete and at least performance-neutral, since the partial port requires slow workarounds.
Original issue's description:
> [regexp] Port RegExp getters and setters
>
> BUG=v8:5339
>
> Committed: https://crrev.com/ac0eb5e05af40e16ae9402bb8a62600b32cc2ec9
> Committed: https://crrev.com/7711b1a16f864ed6ea56fa40274ff3f6287bbe34
> Cr-Original-Commit-Position: refs/heads/master@{#39076}
> Cr-Commit-Position: refs/heads/master@{#39088}
TBR=bmeurer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2313713002
Cr-Commit-Position: refs/heads/master@{#39176}
Reason for revert:
Performance regressions: crbug.com/644087
Clusterfuzz: crbug.com/644074
We'll reland all regexp changes at once when the port is complete and at least performance-neutral, since the partial port requires slow workarounds.
Original issue's description:
> [regexp] Port RegExpCompile and RegExpToString
>
> BUG=v8:5339
>
> Committed: https://crrev.com/836299aa9c484eb96b6b4aa48270ab2c30b85801
> Cr-Commit-Position: refs/heads/master@{#39119}
TBR=bmeurer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2311883002
Cr-Commit-Position: refs/heads/master@{#39170}
Reason for revert:
Performance regressions: crbug.com/644087
Clusterfuzz: crbug.com/644074
We'll reland all regexp changes at once when the port is complete and at least performance-neutral, since the partial port requires slow workarounds.
Original issue's description:
> [regexp] Remove dead code
>
> Remove dead code, and drop the legacy RegExp.prototype.exec implementation (the
> only differences are TO_BOOLEAN on global and sticky).
>
> BUG=v8:5339
>
> Committed: https://crrev.com/1cb2a70cb5baa7545fdf9cc4e035a6d45cb189fd
> Cr-Commit-Position: refs/heads/master@{#39121}
TBR=bmeurer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2310903002
Cr-Commit-Position: refs/heads/master@{#39165}
Reason for revert:
Performance regressions: crbug.com/644087
Clusterfuzz: crbug.com/644074
We'll reland all regexp changes at once when the port is complete and at least performance-neutral, since the partial port requires slow workarounds.
Original issue's description:
> [regexp] Port RegExpExec
>
> BUG=v8:5339
>
> Committed: https://crrev.com/c79e163ba82f2e2dcf9b60639127d187fdbf54b9
> Cr-Commit-Position: refs/heads/master@{#39150}
TBR=bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2315473002
Cr-Commit-Position: refs/heads/master@{#39160}
Remove dead code, and drop the legacy RegExp.prototype.exec implementation (the
only differences are TO_BOOLEAN on global and sticky).
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2301803003
Cr-Commit-Position: refs/heads/master@{#39121}
Up until now, the passed attributes were completely ignored and we
defaulted to DONT_ENUM every time.
BUG=
Review-Url: https://codereview.chromium.org/2297193005
Cr-Commit-Position: refs/heads/master@{#39091}
As part of the work to implement catch prediction for async functions,
the resulting Promise that is the output of the function needs to be
available earlier for a couple reasons:
- To be able to do %DebugPushPromise/%DebugPopPromise over the body
of the async function
- To be able to pass the resulting promise into AsyncFunctionAwait
in order to set up the dependency chains
This patch creates the Promise earlier and pushes it onto the debug
stack; a later patch will set up the dependency chain. Although the
debug stack is set up, it's not anticipated that this will change
the catch prediction helpfully yet, as everything will still likely
be predicted as 'caught' for now, as before.
R=caitp@igalia.com,yangguo@chromium.org
CC=neis@chromium.org,gsathya@chromium.org
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2233923003
Cr-Commit-Position: refs/heads/master@{#38957}
This patch fixes up one last case of redundant ExceptionEvents being
triggered in the debugger for Promises--it makes the default reject
handler for Promises (e.g., if the second argument for
Promise.prototype.then is missing) appear to the debugger as a
rethrow.
R=adamk@chromium.org,jgruber@chromium.org
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2278643002
Cr-Commit-Position: refs/heads/master@{#38876}
To make async/await catch prediction work well, this patch regularizes
the exception events sent to DevTools from various places in the Promise
lifecycle. The core is that there should be an exception event when the
rejection first starts, rather than when it is propagated.
- Several cases within Promise code which propagate errors are
modified to not trigger a new ExceptionEvent in that case, such
as .then on a rejected Promise and returning a rejected Promise
from .then, as well as Promise.race and Promise.all.
- Make Promise.reject() create an ExceptionEvent, subject to catch
prediction based on the Promise stack. This is important
so that, e.g., if "await Promise.reject()" will trigger a new
throw (rather than a silent rethrow of something that never
triggered an event in the first place).
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2244003003
Cr-Commit-Position: refs/heads/master@{#38847}
This flag was shipped on in 52, so it's due for removal. The patch includes
removing the deprecated and unused-in-Blink API Promise::Chain, and many
test updates.
R=adamk@chromium.org
BUG=v8:4633
Review-Url: https://codereview.chromium.org/2267033002
Cr-Commit-Position: refs/heads/master@{#38804}
Includes fast paths in the runtime for
DictionaryElementsAccessor, FastSmiOrObjectElementsAccessor,
FastDoubleElementsAccessor, TypedElementsAccessor, and
SloppyArgumentsElementsAccessor.
BUG=
Review-Url: https://codereview.chromium.org/2232063002
Cr-Commit-Position: refs/heads/master@{#38800}
Language tags with Unicode extensions can have multiple subtags
for a key (e.g. -ca-ismalic-civil has 'islamic-civi' for 'ca').
BUG=v8:4749
TEST=intl/date-format/calendar-with-multiple-type-subtags.js
Review-Url: https://codereview.chromium.org/2248563003
Cr-Commit-Position: refs/heads/master@{#38692}
Reason for revert:
WebGL tests have been updated and rolled (at https://codereview.chromium.org/2227023002), so this should no longer fail outdated tests.
Original issue's description:
> Revert of Amend DataView, ArrayBuffer, and TypedArray methods to use ToIndex. (patchset #8 id:140001 of https://codereview.chromium.org/2090353003/ )
>
> Reason for revert:
> Speculative revert to unblock roll: https://codereview.chromium.org/2107223003/
>
> Original issue's description:
> > Amend DataView, ArrayBuffer, and TypedArray methods to use ToIndex.
> >
> > The spec was modified to relax some requirements which implementors had not been
> > enforcing. Part of this process involved introducing a new abstract operation
> > ToIndex, which had partial overlap with our existing semantics as well as some
> > differences (most notably treating undefined as 0). Test262 tests were introduced to
> > check for the new semantics, some of which we were failing. This patch amends the
> > parts of our implementation corresponding to specification algorithms which use
> > ToIndex to follow its semantics precisely.
> >
> > BUG=v8:4784,v8:5120
> >
> > Committed: https://crrev.com/09720349ea058d178521ec58d0a5676443a5a132
> > Cr-Commit-Position: refs/heads/master@{#37406}
>
> TBR=littledan@chromium.org,adamk@chromium.org,bakkot@google.com
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:4784,v8:5120
>
> Committed: https://crrev.com/b1f7f1f4e41a723d5f997738a07e35a031713b8f
> Cr-Commit-Position: refs/heads/master@{#37417}
TBR=littledan@chromium.org,adamk@chromium.org,hablich@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:4784,v8:5120
Review-Url: https://codereview.chromium.org/2247073004
Cr-Commit-Position: refs/heads/master@{#38689}
Removes dependence on InnerArrayIndexOf/InnerArrayLastIndexOf and
reduces type polution caused by sharing these functions between standard
and typed arrays.
BUG=
Review-Url: https://codereview.chromium.org/2243523002
Cr-Commit-Position: refs/heads/master@{#38637}
The hand-written KeyedLoadIC_Megamorphic stub didn't care about JSArray
lengths, which made it lenient towards said lengths being wrong, but it
will soon fix that bug and thereby become more strict.
LiveEdit: factory->NewJSArray(capacity) doesn't set a length, so set it
manually.
RegExp: to avoid having to take care of array length updating in the
RegExpExecStub, just use a JSObject instead.
Review-Url: https://codereview.chromium.org/2244673002
Cr-Commit-Position: refs/heads/master@{#38624}
These were the final remnants of error code written in JavaScript.
BUG=
Review-Url: https://codereview.chromium.org/2222893002
Cr-Commit-Position: refs/heads/master@{#38475}
- Don't read .constructor when returning a Promise from an async function.
Instead, call out to the internals of Promise.resolve directly.
This is done by adding back in an "optimization" from an earlier form of
the async/await code written by Caitlin Potter.
- Async functions always return a new Promise with a distinct identity,
even if they simply return another Promise.
R=caitp@igalia.com
BUG=v8:4483
Review-Url: https://codereview.chromium.org/2219623002
Cr-Commit-Position: refs/heads/master@{#38404}
Promise.resolve
Instead of creating resolve and reject closures, directly
call ResolvePromise after creating the promise.
Using the following as a microbenchmark --
```
var b = 0;
var start = performance.now();
for (var i = 0; i < 1000000; i++) {
Promise.resolve(1).then((val) => {
b += val;
if (b == 1000000) print(performance.now() - start)
});
}
```
I see a 16.01% improvement over 5 runs with this patch.
BUG=v8:5046
Review-Url: https://codereview.chromium.org/2143553002
Cr-Commit-Position: refs/heads/master@{#38318}
This is in preparation to implementing exception prediction for async
functions. Each handler table entry can now predict "caught", "uncaught", or
"promise". The latter indicates that the exception will lead to a promise
rejection.
To mark the relevant try-catch blocks, we add a new native syntax.
try { } %catch (e) { } indicates a TryCatchStatement with the "promise"
prediction.
The previous implementation of using the function to tell the relevant
try-catch apart from inner try-catch blocks will not work for async functions
since these can have inner try-catch blocks inside the same function.
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2161263003
Cr-Commit-Position: refs/heads/master@{#37966}
As required by the spec.
This is a variant of what I reverted in f47e722403.
It will probably still cause a regression but now it's easier to migrate (parts of)
the current implementation to C++, which is expected to make things faster again.
BUG=chromium:627729,v8:5113
Review-Url: https://codereview.chromium.org/2164923002
Cr-Commit-Position: refs/heads/master@{#37897}
This ports a large portion of Error methods to C++,
including the constructor, stack setter and getter,
and Error.prototype.toString.
BUG=
Review-Url: https://codereview.chromium.org/2142933003
Cr-Commit-Position: refs/heads/master@{#37870}
Calling into JS from stack trace generation becomes an issue during
stack overflows: we'd detect a stack overflow, attempt to create an
exception, call into JS, detect a stack overflow, and repeat.
R=yangguo@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2147193002
Cr-Commit-Position: refs/heads/master@{#37837}
This reverts commit 457c02573c because it caused a
regression in SunSpider/string-fasta and possibly AreWeFastYet/Life. Need to
implement this in a smarter way.
TBR=littledan@chromium.org
BUG=chromium:627729,v8:5113
Review-Url: https://codereview.chromium.org/2149303003
Cr-Commit-Position: refs/heads/master@{#37793}
This adds a missing conversion of time zone names to string primitives
before case conversion and regular expression matching are applied.
This is in sync with ECMA-402, section 12.1.1.1, step 16(a).
R=jochen@chromium.org
TEST=mjsunit/regress/regress-crbug-627935
BUG=chromium:627935
Review-Url: https://codereview.chromium.org/2143003005
Cr-Commit-Position: refs/heads/master@{#37757}
* Rename Atomics.futexWait -> Atomics.wait
* Rename Atomics.futexWake -> Atomics.wake
* Remove Atomics.futexWakeOrRequeue
* Return value of Atomics.wait is now a string: "ok", "not-equal" or
"timed-out"
* Update comments that reference URL for ecmascript_sharedmem to
https://github.com/tc39/ecmascript_sharedmem
Review-Url: https://codereview.chromium.org/2143443002
Cr-Commit-Position: refs/heads/master@{#37727}
Remove obsolete definitions from macros.py, and drop the now obsolete
%_ToPrimitive, %_ToPrimitive_Number, %_ToPrimitive_String, %_ToName
and the %ToPrimitive_String intrinsics/runtime entries.
R=yangguo@chromium.org
BUG=v8:5049
Review-Url: https://codereview.chromium.org/2137203002
Cr-Commit-Position: refs/heads/master@{#37665}
The Intl code previously called the initial value of String.prototype.split
for some internal operations. However, this did not have the intended effect
as Intl only needs to split strings by strings, but String.prototype.split
has integration with Symbol.split for RegExps.
This patch replaces the calls of StringSplit in the Intl implementation
with direct calls to the %StringSplit runtime function to avoid the issue.
R=yangguo@chromium.org
BUG=v8:5179
Review-Url: https://codereview.chromium.org/2126073002
Cr-Commit-Position: refs/heads/master@{#37615}
Drive-by-fix: hydrogen code does not blindly return the
byteLength offset, instead it executes what is defined
in the byteLength getter.
BUG=
Review-Url: https://codereview.chromium.org/2123263002
Cr-Commit-Position: refs/heads/master@{#37595}
Working on eliminating the use of ClassOf(). This function was checking IS_ARRAYBUFFER.
BUG=
Review-Url: https://codereview.chromium.org/2126603003
Cr-Commit-Position: refs/heads/master@{#37565}
This drops the %_ValueOf intrinsic, but keeps the runtime entry
%ValueOf for now, by either migrating the functionality (mostly
Debug mirror or toString/valueOf methods) to C++ or TurboFan
builtins, or switching to the %ValueOf runtime call when it's
not performance critical anyways.
The %_ValueOf intrinsic was one of the last blockers for fixing
the unsound machine operator typing in TurboFan.
R=yangguo@chromium.org
BUG=v8:5049
Committed: https://crrev.com/293bd7882987f00e465710ce468bfb1eaa7d3fa2
Review-Url: https://codereview.chromium.org/2126453002
Cr-Original-Commit-Position: refs/heads/master@{#37512}
Cr-Commit-Position: refs/heads/master@{#37519}
Reason for revert:
[Sheriff] Breaks without i18n:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20noi18n%20-%20debug/builds/8466
Original issue's description:
> [intrinsic] Drop the %_ValueOf intrinsic.
>
> This drops the %_ValueOf intrinsic, but keeps the runtime entry
> %ValueOf for now, by either migrating the functionality (mostly
> Debug mirror or toString/valueOf methods) to C++ or TurboFan
> builtins, or switching to the %ValueOf runtime call when it's
> not performance critical anyways.
>
> The %_ValueOf intrinsic was one of the last blockers for fixing
> the unsound machine operator typing in TurboFan.
>
> R=yangguo@chromium.org
> BUG=v8:5049
>
> Committed: https://crrev.com/293bd7882987f00e465710ce468bfb1eaa7d3fa2
> Cr-Commit-Position: refs/heads/master@{#37512}
TBR=yangguo@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5049
Review-Url: https://codereview.chromium.org/2117273002
Cr-Commit-Position: refs/heads/master@{#37514}
This concerns formatting of calls to, e.g., Math.acos in stack traces,
in which the receiver is an object with an attached toString tag. If
such a tag exists, use it to format the receiver typename to ensure that
the stack trace includes 'Math.acos' instead of 'Object.acos'.
R=yangguo@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2110683007
Cr-Commit-Position: refs/heads/master@{#37513}
This drops the %_ValueOf intrinsic, but keeps the runtime entry
%ValueOf for now, by either migrating the functionality (mostly
Debug mirror or toString/valueOf methods) to C++ or TurboFan
builtins, or switching to the %ValueOf runtime call when it's
not performance critical anyways.
The %_ValueOf intrinsic was one of the last blockers for fixing
the unsound machine operator typing in TurboFan.
R=yangguo@chromium.org
BUG=v8:5049
Review-Url: https://codereview.chromium.org/2126453002
Cr-Commit-Position: refs/heads/master@{#37512}
Stack trace generation requires access to the receiver; and while the
receiver is already on the stack, we cannot determine its position
during stack trace generation (it's stored in argv[0], and argc is only
stored in a callee-saved register).
This patch grants access to the receiver by pushing argc onto builtin
exit frames as an extra argument. Compared to simply pushing the
receiver, this requires an additional dereference during stack trace
generation, but one fewer during builtin calls.
BUG=v8:4815
Review-Url: https://codereview.chromium.org/2106883003
Cr-Commit-Position: refs/heads/master@{#37500}
