Debug evaluate no longer writes back changes to the replicated
context chain to the original after execution. Changes to the
global object or script contexts still stick. Calling functions
that bind to the original context chain also have their expected
side effects.
As far as I can tell, DevTools is not interested in modifying
local variable values. Modifying global variable values still
works as expected. However, I have not yet removed the old
implementation, but merely keep it behind a flag.
R=mstarzinger@chromium.org, rossberg@chromium.org
Review URL: https://codereview.chromium.org/1513183003
Cr-Commit-Position: refs/heads/master@{#32841}
Debug-evaluate used to resolve stack variables that shadow
context variables incorrectly, since the stack variable is
not visible in the context chain.
To fix this, we limit local variables accessible by debug-
evaluate to the ones directly referenced inside the function.
What is not referenced by the function itself, is considered
optimized out and not accessible by debug-evaluate.
To achieve this, we duplicate the entire context chain up to
the native context, and write back changes after debug-
evaluate. Changes to the original context chain will however
be overwritten. This already happens for catch and block
scopes though.
Also fix a crash caused by declaring variables inside debug-
evaluate.
R=mstarzinger@chromium.org
BUG=v8:4593
LOG=N
Review URL: https://codereview.chromium.org/1500933002
Cr-Commit-Position: refs/heads/master@{#32828}
This patch removes Promise functions and methods which are absent
from the ES2015 specification when the --es-staging flag is on.
The patch is being relanded after being reverted due to an
unrelated bug. This version is slightly different as promise_chain
is installed on the context regardless of the flag value, so that
the Promise::Chain API continues to work until it is deprecated.
BUG=v8:3237
R=rossberg
LOG=Y
Review URL: https://codereview.chromium.org/1513873002
Cr-Commit-Position: refs/heads/master@{#32772}
Function subclasses did not have function properties installed (name, prototype, etc.).
Now when an instance of a Function subclass is created it gets initial map that corresponds
to the language mode of the function body. The language mode dependent maps are cached as
special transitions on initial map of the subclass constructor.
BUG=v8:4597, v8:3101, v8:3330
LOG=Y
Review URL: https://codereview.chromium.org/1510753005
Cr-Commit-Position: refs/heads/master@{#32764}
Reason for revert:
[Sheriff] Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/3266
Please request rebase upstream first.
Original issue's description:
> Clean up promises and fix an edge case bug
>
> This patch builds on previous Promise spec compliance work by
> cleaning out some old code which existed to support
> Promise.prototype.chain, rephrasing some code to correspond more
> closely to the specification, and removing some incorrect brand
> checking. A test is added for a bug in an edge case which was fixed.
>
> R=rossberg
> BUG=v8:3641
> LOG=Y
>
> Committed: https://crrev.com/1deb89c8fd3cb69714ae0a24e3b5a4e78f6b73b4
> Cr-Commit-Position: refs/heads/master@{#32627}
TBR=rossberg@chromium.org,caitpotter88@gmail.com,littledan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3641
Review URL: https://codereview.chromium.org/1501763004
Cr-Commit-Position: refs/heads/master@{#32629}
This patch builds on previous Promise spec compliance work by
cleaning out some old code which existed to support
Promise.prototype.chain, rephrasing some code to correspond more
closely to the specification, and removing some incorrect brand
checking. A test is added for a bug in an edge case which was fixed.
R=rossberg
BUG=v8:3641
LOG=Y
Review URL: https://codereview.chromium.org/1488783002
Cr-Commit-Position: refs/heads/master@{#32627}
Reason for revert:
Blocks the roll:
https://codereview.chromium.org/1497763004/
Original issue's description:
> [es6] Correctify and unify ArrayBuffer and SharedArrayBuffer constructors.
>
> The ArrayBuffer and SharedArrayBuffer constructors should raise an
> exception when called with no arguments or undefined length. Also
> unified the ArrayBuffer and SharedArrayBuffer implementations as C++
> builtins, and removed some (now) obsolete runtime entries.
>
> R=yangguo@chromium.org
>
> Committed: https://crrev.com/3235ccbb7826ceec2188f6ebab98fc851b54f60e
> Cr-Commit-Position: refs/heads/master@{#32590}
TBR=yangguo@chromium.org,cbruni@chromium.org,adamk@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1501673002
Cr-Commit-Position: refs/heads/master@{#32606}
The ArrayBuffer and SharedArrayBuffer constructors should raise an
exception when called with no arguments or undefined length. Also
unified the ArrayBuffer and SharedArrayBuffer implementations as C++
builtins, and removed some (now) obsolete runtime entries.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1500543002
Cr-Commit-Position: refs/heads/master@{#32590}
This passes the new.target value in a register instead of through a
side-channel via the construct stub. Note that this marks the last
consumer of said side-channel and the special slot in the construct
stub frame can be removed as a follow-up.
R=bmeurer@chromium.org,yangguo@chromium.org
TEST=mjsunit/es6/regress/regress-new-target-context
Review URL: https://codereview.chromium.org/1492793002
Cr-Commit-Position: refs/heads/master@{#32548}
This hackily disambiguates multiple calls for the iterator protocols in ForOf / Yield* by adding -2 / -1 to the pos.
BUG=v8:3953
LOG=y
Review URL: https://codereview.chromium.org/1491923003
Cr-Commit-Position: refs/heads/master@{#32527}
Sanitize ConstructStub handling and add a test case to ensure that the
Symbol constructor is using the correct context.
R=jarin@chromium.org
BUG=v8:4413
LOG=n
Review URL: https://codereview.chromium.org/1489323002
Cr-Commit-Position: refs/heads/master@{#32491}
This moves the bailout for functions containing new.target variable to
the correct place so that Crankshaft doesn't accidentally inline such
functions, yielding an "undefined" new.target value all the time.
R=bmeurer@chromium.org
TEST=mjsunit/es6/regress/regress-inlined-new-target
Review URL: https://codereview.chromium.org/1484163003
Cr-Commit-Position: refs/heads/master@{#32468}
This makes sure that proxy + Function/Array works
Makes sure that new.target can be a generator
Makes sure that if new.target is not a subclass, but does not have a prototype, that we'll get that same prototype back the next time we look at new.target.prototype.
BUG=v8:1543, v8:3330, v8:3931
LOG=n
Review URL: https://codereview.chromium.org/1484473002
Cr-Commit-Position: refs/heads/master@{#32382}
This patch removes Promise functions and methods which are absent
from the ES2015 specification when the --es-staging flag is on.
BUG=v8:3237
R=rossberg
LOG=Y
Review URL: https://codereview.chromium.org/1469543003
Cr-Commit-Position: refs/heads/master@{#32194}
In a function expression, 'yield' is allowed, even if the expression
occurs inside a generator. Similarly, even in a non-generator,
a generator expression's name must not be 'yield'.
BUG=v8:3983
LOG=n
Review URL: https://codereview.chromium.org/1460393003
Cr-Commit-Position: refs/heads/master@{#32188}
This is in preparation for the addition of --harmony-destructuring-assignment.
BUG=v8:811
LOG=n
Review URL: https://codereview.chromium.org/1450193002
Cr-Commit-Position: refs/heads/master@{#32098}
Several changes are included here:
1. Each resolution callback references shared data indicating whether
it has already been resolved or not, as described in 25.4.1.3
http://tc39.github.io/ecma262/#sec-createresolvingfunctions.
Previously this was handled exclusively by the Promise's status,
which does not work correctly with the current chaining behaviour.
2. During fulfillment, When a Promise is resolved with a thenable, the
spec chains the promises together by invoking the thenable's `then`
function with the original Promise's resolve and reject methods (per
section 25.4.2.2, or
http://tc39.github.io/ecma262/#sec-promiseresolvethenablejob, on the
next tick, regardless of whether or not there are pending tasks.
3. Adds a spec compliance fix to ensure that the Promise constructor
is only loaded once when `then()` is called, solving v8:4539 as well.
This involves refactoring PromiseChain to accept a constructor
argument. PromiseChain/PromiseDeferred will hopefully be removed soon,
simplifying the process.
BUG=v8:4162, v8:4539, v8:3237
LOG=N
R=rossberg@chromium.org, littledan@chromium.org, adamk@chromium.org
Review URL: https://codereview.chromium.org/1394463003
Cr-Commit-Position: refs/heads/master@{#32046}
Fix an earlier regression which forbid non-VariableProxy LHS from being
used in for-of loops. Like for-in loops, the spec allows any LHS to be used,
with the sole exception that ObjectLiterals and ArrayLiterals must be valid
AssignmentPatterns.
Also fixes a bug in TurboFan which resulted in incorrectly replacing a variable load with a constant value in some instances, due to the AstLoopAssignmentAnalyzer failing to record the assignment to ForOfStatement's value.
BUG=v8:4418, v8:2720
LOG=N
R=wingo@igalia.com, littledan@chromium.org, adamk@chromium.org, bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1411873004
Cr-Commit-Position: refs/heads/master@{#31816}
This patch moves ES2015 ToLength semantics on array operations, etc
to from staging to shipping.
R=adamk
BUG=v8:3087
LOG=Y
Review URL: https://codereview.chromium.org/1433473003
Cr-Commit-Position: refs/heads/master@{#31810}
The current implementation of classes throws the TypeError at the wrong
point, after activating a new context when directly calling a class
constructor. According to the spec, the TypeError has to be thrown
in the caller context.
LOG=N
BUG=v8:4428
Committed: https://crrev.com/6a06bc0a774933719f62009d81b3f1686d83bb90
Cr-Commit-Position: refs/heads/master@{#31786}
Review URL: https://codereview.chromium.org/1418623007
Cr-Commit-Position: refs/heads/master@{#31790}
Reason for revert:
failing build bot
Original issue's description:
> [runtime] Fix ES6 9.2.1 [[Call]] when encountering a classConstructor.
>
> The current implementation of classes throws the TypeError at the wrong
> point, after activating a new context when directly calling a class
> constructor. According to the spec, the TypeError has to be thrown
> in the caller context.
>
> LOG=N
> BUG=v8:4428
>
> Committed: https://crrev.com/6a06bc0a774933719f62009d81b3f1686d83bb90
> Cr-Commit-Position: refs/heads/master@{#31786}
TBR=bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4428
Review URL: https://codereview.chromium.org/1415783006
Cr-Commit-Position: refs/heads/master@{#31787}
The current implementation of classes throws the TypeError at the wrong
point, after activating a new context when directly calling a class
constructor. According to the spec, the TypeError has to be thrown
in the caller context.
LOG=N
BUG=v8:4428
Review URL: https://codereview.chromium.org/1418623007
Cr-Commit-Position: refs/heads/master@{#31786}
Original issue's description:
> [es6] Fix Function and GeneratorFunction built-ins subclassing.
>
> BUG=v8:3101, v8:3330
> LOG=Y
>
> Committed: https://crrev.com/99e7f872d3d0a5fb799dcbafb05537cda491314a
> Cr-Commit-Position: refs/heads/master@{#31708}
The problem was in another CL, this is a clean reland with improved tests.
BUG=v8:3101, v8:3330
LOG=Y
Review URL: https://codereview.chromium.org/1415683007
Cr-Commit-Position: refs/heads/master@{#31756}
If the property is a data property on the holder (or does not exist) and is a readonly data property in the receiver, then we must fail.
R=rossberg, verwaest@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1424233005
Cr-Commit-Position: refs/heads/master@{#31751}
1) The Map::CopyInitialMap() did not set descriptor's array if
the source initial map had one.
2) Subclasses are temporarily disallowed to have more in-object
properties than the parent class (for GC reasons).
BUG=v8:3101, v8:3330, v8:4531
LOG=N
Review URL: https://codereview.chromium.org/1431593003
Cr-Commit-Position: refs/heads/master@{#31743}
Original issue's description:
> [es6] Better support for built-ins subclassing.
>
> Create proper initial map for original constructor (new.target) instead of doing prototype
> transition on the base constructor's initial map. This approach fixes in-object slack tracking
> for subclass instances.
> This CL also fixes subclassing from String.
>
> BUG=v8:3101, v8:3330
> LOG=Y
>
> Committed: https://crrev.com/cd5f48302a502154a0106d12e3066bd563c6340c
> Cr-Commit-Position: refs/heads/master@{#31680}
It also fixes typed array map smashing done during typed array initialization.
BUG=v8:3101, v8:3330, v8:4419
LOG=Y
Review URL: https://codereview.chromium.org/1413033006
Cr-Commit-Position: refs/heads/master@{#31701}
Create proper initial map for original constructor (new.target) instead of doing prototype transition on the base constructor's initial map. This approach fixes in-object slack tracking for subclass instances.
This CL also fixes subclassing from String.
BUG=v8:3101, v8:3330
LOG=Y
Review URL: https://codereview.chromium.org/1427483002
Cr-Commit-Position: refs/heads/master@{#31680}
The fix is to broaden the set of cases for when NeedsHomeObject()
returns true. Note that this is broader than it needs to be (since,
e.g., non-arrow function scopes inside a method can't reference
super). But we don't track the types of inner scopes at the moment,
so this is the best we can do.
R=rossberg@chromium.org
BUG=v8:4522
LOG=n
Review URL: https://codereview.chromium.org/1411093008
Cr-Commit-Position: refs/heads/master@{#31659}
When == is invoked on a Symbol or SIMD vector and an object, the object should
be converted to a primitive with ToPrimitive and then compared again. This means,
for example, that for a Symbol or SIMD vector s, s == Object(s). This patch makes
that change in the implementation of ==. Only the runtime function needed to be
changed, as the code stubs and compiler specializations don't operate on Symbols
or SIMD vectors, and on these types, a fallback to the runtime function is always
used.
BUG=v8:3593
LOG=Y
R=adamk
Review URL: https://codereview.chromium.org/1421413002
Cr-Commit-Position: refs/heads/master@{#31614}
The debugger calls PromiseHasUserDefinedRejectHandler to recursively search the
tree of dependent promises for user-defined reject handlers. If no such reject
handler exists, rejecting the promise is considered an uncaught exception.
Promise.race and Promise.all interupt the link of promise dependency wrt the
search. This change fixes that link.
R=rossberg@chromium.org
BUG=chromium:439585
LOG=N
Review URL: https://codereview.chromium.org/1411083003
Cr-Commit-Position: refs/heads/master@{#31392}
Native context specialization now lowers monomorphic and
polymorphic accesses to data and constant data properties on
object and/or prototype chain. We don't deal with accessors
yet, and we also completely ignore proxies (which is compatible
with what Crankshaft does).
The code is more or less the straightforward implementation. We
will need to refactor that and extract common patterns once the
remaining bits for full load/store support is in.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
R=jarin@chromium.org
BUG=v8:4470
LOG=n
Committed: https://crrev.com/3a0bf860b7177f7abef01ff308a53603389d958e
Cr-Commit-Position: refs/heads/master@{#31340}
Review URL: https://codereview.chromium.org/1396333010
Cr-Commit-Position: refs/heads/master@{#31352}
Reason for revert:
Waterfall redness.
Original issue's description:
> [turbofan] Initial support for monomorphic/polymorphic property loads.
>
> Native context specialization now lowers monomorphic and
> polymorphic accesses to data and constant data properties on
> object and/or prototype chain. We don't deal with accessors
> yet, and we also completely ignore proxies (which is compatible
> with what Crankshaft does).
>
> The code is more or less the straightforward implementation. We
> will need to refactor that and extract common patterns once the
> remaining bits for full load/store support is in.
>
> CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
> R=jarin@chromium.org
> BUG=v8:4470
> LOG=n
>
> Committed: https://crrev.com/3a0bf860b7177f7abef01ff308a53603389d958e
> Cr-Commit-Position: refs/heads/master@{#31340}
TBR=bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4470
Review URL: https://codereview.chromium.org/1408123002
Cr-Commit-Position: refs/heads/master@{#31341}
Native context specialization now lowers monomorphic and
polymorphic accesses to data and constant data properties on
object and/or prototype chain. We don't deal with accessors
yet, and we also completely ignore proxies (which is compatible
with what Crankshaft does).
The code is more or less the straightforward implementation. We
will need to refactor that and extract common patterns once the
remaining bits for full load/store support is in.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
R=jarin@chromium.org
BUG=v8:4470
LOG=n
Review URL: https://codereview.chromium.org/1396333010
Cr-Commit-Position: refs/heads/master@{#31340}
Make the end position of a regexp literal the first character following the regexp. This matches the behaviour of number literals and string literals, as well as single-character tokens.
This change corrects the lazy-parsing of arrow functions with concise bodies, whose last token is a regular expression literal.
BUG=v8:4474
LOG=N
R=wingo@igalia.com, adamk@chromium.org, rossberg@chromium.org
Review URL: https://codereview.chromium.org/1389313003
Cr-Commit-Position: refs/heads/master@{#31189}
Previously, arrow function scopes had a separate ScopeType. However,
Scope::DeserializeScopeChain() erroneously deserialized ARROW_SCOPE
ScopeInfos as FUNCTION_SCOPE. This could lead to bugs such as the
attached one, where "super" was disallowed where it should have
been allowed.
This patch utilizes the Scope's FunctionKind to distinguish arrow
functions from others. Besides fixing the above bug, this also
simplifies code in various places that had to deal with two different
ScopeTypes both of which meant "function".
BUG=v8:4466
LOG=n
Review URL: https://codereview.chromium.org/1386253002
Cr-Commit-Position: refs/heads/master@{#31154}
* Promise.resolve is now works with subclasses
* Spec removed [[PromiseConstructor]] now can simply use constructor
* Promise.resolve ignores species
R=littledan@chromium.org,domenic@chromium.org
BUG=v8:4161,v8:4341
LOG=Y
Review URL: https://codereview.chromium.org/1362773002
Cr-Commit-Position: refs/heads/master@{#31116}
Arrow functions have been enabled by default since the 4.5 branch.
Review URL: https://codereview.chromium.org/1373633002
Cr-Commit-Position: refs/heads/master@{#31031}
The actual Function.prototype.toMethod was removed some time already,
but there were some stuff (esp. %ToMethod) left in the tree, including
tests for %ToMethod. This code (and esp. the tests) cause trouble in
the process of moving bound functions away from JSFunction; so since
the code is unused anyway, we can as well remove it.
The original removal of Function.prototype.toMethod was in February
2015 in 68e4897586.
R=jarin@chromium.org
BUG=v8:3330
LOG=n
Review URL: https://codereview.chromium.org/1366063002
Cr-Commit-Position: refs/heads/master@{#30925}
Since https://codereview.chromium.org/366103005 the promise tests null out
various globals, to ensure the promise implementation doesn’t itself rely
on functions patchable by monkeys.
Unfortunately, doing so breaks test assertion failures which rely on
those globals.
This isn’t the ideal solution, but does improve the current state.
R=littledan@chromium.org,domenic@chromium.org
LOG=N
BUG=
Review URL: https://codereview.chromium.org/1370583002
Cr-Commit-Position: refs/heads/master@{#30922}
It's been enabled since M45, which is now well into its stable period,
with no problems reported.
Review URL: https://codereview.chromium.org/1356793002
Cr-Commit-Position: refs/heads/master@{#30835}
Add support for `get` and `set` as shorthand properties. Also
supports them for CoverInitializedName in BindingPatterns and (once implemented)
AssignmentPatterns.
BUG=v8:4412, v8:3584
LOG=N
R=adamk, aperez, wingo, rossberg
Review URL: https://codereview.chromium.org/1328083002
Cr-Commit-Position: refs/heads/master@{#30769}
In certiain cases the ArgumentsIteratorSetter would trigger an invalid
state in the LookupIterator when being overridden. This is now solved
by bypassing the SetDataProperty and directly using
DefinePropertyOrElementIgnoringAttributes since we know exactly which
property we're going to install
LOG=N
BUG=chromium:521484
Review URL: https://codereview.chromium.org/1332873002
Cr-Commit-Position: refs/heads/master@{#30705}
Make ObjectLiteral::is_simple() false for literals containing computed
property names, which causes IsCompileTimeValue() to return false and
thus force code to be generated for setting up such properties. This
mirrors the handling of '__proto__' in literals.
BUG=v8:4387
LOG=y
Review URL: https://codereview.chromium.org/1307943007
Cr-Commit-Position: refs/heads/master@{#30362}
