This patch implements "immutable prototype exotic objects" from the ECMAScript
spec, which are objects whose __proto__ cannot be changed, but are not otherwise
frozen. They are introduced in order to prevent a Proxy from being introduced
to the prototype chain of the global object.
The API is extended by a SetImmutablePrototype() call in ObjectTemplate, which
can be used to vend new immutable prototype objects. Additionally, Object.prototype
is an immutable prototype object.
In the implementation, a new bit is added to Maps to say whether the prototype is
immutable, which is read by SetPrototype. Map transitions to the immutable prototype
state are not saved in the transition tree because the main use case is just for
the prototype chain of the global object, which there will be only one of per
Context, so no need to take up the extra word for a pointer in each full transition
tree.
BUG=v8:5149
Review-Url: https://codereview.chromium.org/2108203002
Cr-Commit-Position: refs/heads/master@{#37482}
ES2017 draft 19.1.3.6: If @@toStringTag is not a string, Object.prototype.toString()
returns [object Object], except in the following cases:
- Array
- String
- Arguments
- Function
- Error
- Boolean
- Number
- Date
- RegExp.
For anything else, e.g., Maps, Sets, TypedArrays, or the global object, toString() returns
[object Object] if @@toStringTag is absent or not a string. In order to be able to
easily identify the global object in d8, we set @@toStringTag to "global"
for d8.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=
Review-Url: https://codereview.chromium.org/2071343002
Cr-Commit-Position: refs/heads/master@{#37218}
Base the fast-path in AdjustAmountOfExternalMemory on a value + limit. To
preserve the behavior the limit is just set using kExternalAllocationLimit.
Redo naming of related members.
R=jochen@chromium.org
BUG=chromium:621829
LOG=N
Review-Url: https://codereview.chromium.org/2085893002
Cr-Commit-Position: refs/heads/master@{#37131}
It is expected that temporarily used strings die while they are
in new heap. So we can avoid to pay a heavy cost to externalize
them. If they are used for times, externalization will happen
when they move to an old heap.
BUG=chrmoium:606093
Review-Url: https://codereview.chromium.org/2046933002
Cr-Commit-Position: refs/heads/master@{#36907}
We ported hashmap.h into libsampler as a workaround before, so the main focus of
this patch is to reduce code duplication. This patch moves the hashmap into
src/base as well as creates DefaultAllocationPolicy using malloc and free.
BUG=v8:5050
LOG=n
Review-Url: https://codereview.chromium.org/2010243003
Cr-Commit-Position: refs/heads/master@{#36873}
Now they use a proper way of checking if the snapshot is available or not.
Review-Url: https://codereview.chromium.org/2054693002
Cr-Commit-Position: refs/heads/master@{#36844}
PrimaryStubCache and SecondaryStubCache: resurrected outdated tests (and enabled stub cache counters in the new LoadIC).
TryProbeStubCache: decreased number of code objects created.
Review-Url: https://codereview.chromium.org/2040193002
Cr-Commit-Position: refs/heads/master@{#36794}
In most cases we return a Smi and undefined for the other cases. Hence there
is no need to handlify the result unecessary. Additionally pass in the isolate
for the hash-symbol lookup.
BUG=
Review-Url: https://codereview.chromium.org/2044843002
Cr-Commit-Position: refs/heads/master@{#36790}
Expose more or less the full functionality of the KeyAccumulator in the API:
- use the PropertyFilter introduced for GetOwnPropertyNames
- use KeyCollectionLimit for OWN_ONLY or INLCUDE_PROTOS
- use IndexFilter to eithe SKIP_INDICES or INCLUDE_INDICES
Rewire Object::GetOwnPropertyNames to use GetPropertyNames.
BUG=chromium:148757
Review-Url: https://codereview.chromium.org/2002203002
Cr-Commit-Position: refs/heads/master@{#36595}
Script position calculation logic (i.e. line & column numbers for a
given code position) is now based on a single method
Script::GetPositionInfo(). Refactored related code in isolate.cc and
js/messages.js to use the new method. The line_ends accessor is still
in use by chromium and thus cannot be removed yet.
R=yangguo@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2002993002
Cr-Commit-Position: refs/heads/master@{#36458}
- Move usable functions into proper heap-utils.h/.cc files and remove
utils-inl.h file
- Fix assumptions accross the board relying on certain behavior that is not
invariant
This is a requirement for modifying page size.
BUG=chromium:581412
LOG=N
R=ulan@chromium.org
Review-Url: https://codereview.chromium.org/1999753002
Cr-Commit-Position: refs/heads/master@{#36410}
Script position calculation logic (i.e. line & column numbers for a
given code position) is now based on a single method
Script::GetPositionInfo(). Refactored related code in isolate.cc and
js/messages.js to use the new method. The line_ends accessor is still
in use by chromium and thus cannot be removed yet.
R=yangguo@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2003483002
Cr-Commit-Position: refs/heads/master@{#36398}
Script position calculation logic (i.e. line & column numbers for a
given code position) is now based on a single method
Script::GetPositionInfo(). Refactored related code in isolate.cc and
js/messages.js to use the new method and removed the line_ends JS
accessor.
R=yangguo@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/1986173002
Cr-Commit-Position: refs/heads/master@{#36359}
Remove kMakeHeapIterableMask since the heap is always iterable.
BUG=chromium:580959
LOG=n
Review-Url: https://codereview.chromium.org/1961373003
Cr-Commit-Position: refs/heads/master@{#36333}
When instantiating a subclassed API function, the instance cache is avoided. There is currently no direct API yet to instantiate a Template while passing in a new.target. It probably makes sense to extend ObjectTemplate::NewInstance to accept a new.target, in line with Reflect.construct.
BUG=v8:3330, v8:5001
Review-Url: https://codereview.chromium.org/1972613002
Cr-Commit-Position: refs/heads/master@{#36179}
Old code failed to walk over deleted elements, instead treating
deleted elements as "undefined" in the output array.
This is the Map equivalent of commit 2d9bfe9ad5.
Also micro-optimized the loops to avoid an extra call to KeyAt()
and used a direct hole comparison instead of calling IsTheHole().
R=cbruni@chromium.org
BUG=v8:4946
LOG=y
Review-Url: https://codereview.chromium.org/1965593002
Cr-Commit-Position: refs/heads/master@{#36149}
The flag in question used to fall-back to Crankshaft whenever an OSR
request couldn't be handled by TurboFan. By now OSR in TurboFan is
sufficiently stabilized that one single --use-osr flag should do it.
R=titzer@chromium.org
Review-Url: https://codereview.chromium.org/1960043002
Cr-Commit-Position: refs/heads/master@{#36102}
Add comments explaining how to iterate over an OrderedHashTable.
Use the correct strategy for iteration in Set::AsArray().
Add a DCHECK bounds check in OrderedHashTable::KeyAt().
BUG=v8:4946
LOG=y
Review-Url: https://codereview.chromium.org/1952093002
Cr-Commit-Position: refs/heads/master@{#36091}
This method provides ability to get all properties of the object with passed filter in addition to existing GetOwnPropertyNames(context) method that returns only enumerable properties.
BUG=v8:3861,chromium:581495
R=yangguo@chromium.org
LOG=Y
Review-Url: https://codereview.chromium.org/1943773002
Cr-Commit-Position: refs/heads/master@{#36031}
It is already effectively disabled by --scavenge_reclaim_unmodified_objects.
BUG=
Review-Url: https://codereview.chromium.org/1944793002
Cr-Commit-Position: refs/heads/master@{#36018}
Reason for revert:
[Sheriff] Looks like this breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/6442
Original issue's description:
> Remove more dead code after Object.observe removal
>
> This moves __{define,lookup}{Getter,Setter}__ to builtins.cc to free up the JavaScript implementation of DefineOwnProperty for deletion.
TBR=verwaest@chromium.org,jkummerow@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review-Url: https://codereview.chromium.org/1929293002
Cr-Commit-Position: refs/heads/master@{#35886}
This moves __{define,lookup}{Getter,Setter}__ to builtins.cc to free up the JavaScript implementation of DefineOwnProperty for deletion.
Review-Url: https://codereview.chromium.org/1904313004
Cr-Commit-Position: refs/heads/master@{#35876}
This is needed by Blink to implement the Custom Elements spec.
BUG=v8:4261
LOG=y
Review-Url: https://codereview.chromium.org/1910253005
Cr-Commit-Position: refs/heads/master@{#35833}
The feature was deprecated in M49 and flagged off in M50.
This patch removes it entirely from the codebase.
Review URL: https://codereview.chromium.org/1909433003
Cr-Commit-Position: refs/heads/master@{#35714}
Adds code to call FunctionEntryHook on entry to the InterpreterEntryTrampoline.
This should give SyzyProf enough information to build non-discontinous profile
graphs, however since interpreter functions aren't uniquely identified they will
all get lumped into one bucket. This should be good enough for SyzyProf's current
use-case.
BUG=v8:4763
LOG=N
Review URL: https://codereview.chromium.org/1884133002
Cr-Commit-Position: refs/heads/master@{#35568}
Usually, script compilation is expensive enough to warrant the extra
overhead of caching scripts immediatly.
BUG=chromium:588900
R=yangguo@chromium.org
LOG=n
Review URL: https://codereview.chromium.org/1890083002
Cr-Commit-Position: refs/heads/master@{#35527}
It's been on since M49. Also moved tests from harmony -> es6,
one of which was merged with another test of the same name.
While moving stuff over to regexp.js, I also noticed that there
were unused calls to %FunctionSetName and %SetNativeFlag (those
calls are already handled by InstallGetter()).
Review URL: https://codereview.chromium.org/1838563003
Cr-Commit-Position: refs/heads/master@{#35076}
Makes --ignition cause eager compilation if we aren't building the startup
snapshot.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1811553003
Cr-Commit-Position: refs/heads/master@{#35066}
Both of them shipped in Chrome 49 without incident.
Also move relevant tests from harmony/ to es6/.
Review URL: https://codereview.chromium.org/1815773002
Cr-Commit-Position: refs/heads/master@{#34964}
Reason for revert:
Violates ES6 spec (crbug.com/4850), and implementation was over-eager. Will revert for now.
Original issue's description:
> Parser: Make skipping HTML comments optional.
>
> API change: This adds a new flag skip_html_comments to v8::ScriptOriginOptions. This flag controls whether V8 will attempt to honour HTML-style comments in JS sources.
>
> (That is: Gracefully ignore <!-- ... ---> in JS sources, which was a popular technique in the early days of JavaScript, to prevent non-JS-enabled browsers from displaying script sources to uses.)
>
> The flag defaults to 'true' when using v8::ScriptOrigin constructor, which preserves the existing behaviour. Embedders which are happy with the existing behaviour will thus not need any changes.
>
> BUG=chromium:573887
> LOG=Y
>
> Committed: https://crrev.com/91d344288aa51ed03eaaa1cb3e368ac1e82f0173
> Cr-Commit-Position: refs/heads/master@{#34904}
TBR=jochen@chromium.org,rossberg@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:573887, v8:4850
LOG=Y
Review URL: https://codereview.chromium.org/1817163003
Cr-Commit-Position: refs/heads/master@{#34958}
API change: This adds a new flag skip_html_comments to v8::ScriptOriginOptions. This flag controls whether V8 will attempt to honour HTML-style comments in JS sources.
(That is: Gracefully ignore <!-- ... ---> in JS sources, which was a popular technique in the early days of JavaScript, to prevent non-JS-enabled browsers from displaying script sources to uses.)
The flag defaults to 'true' when using v8::ScriptOrigin constructor, which preserves the existing behaviour. Embedders which are happy with the existing behaviour will thus not need any changes.
BUG=chromium:573887
LOG=Y
Review URL: https://codereview.chromium.org/1801203002
Cr-Commit-Position: refs/heads/master@{#34904}
When black allocation is active, all objects allocated in old space are allocated black. Important: With that change, you cannot assume anymore that new objects are white right after their allocation. Currently, black allocation is enabled when incremental marking is started.
This feature can be turned off via flag: --noblack-allocation
BUG=chromium:561449
LOG=n
Review URL: https://codereview.chromium.org/1420423009
Cr-Commit-Position: refs/heads/master@{#34743}
ES2015 Object.prototype.toString semantics were enabled in version 4.9,
which has been in stable Chrome for nearly two weeks at this point.
R=littledan@chromium.org
Review URL: https://codereview.chromium.org/1784033002
Cr-Commit-Position: refs/heads/master@{#34732}
This scope is used to control microtasks execution when MicrotasksPolicy::kScoped is engaged.
Attempt #2. First one was reverted due to chromium breakage: SetAutorunMicrotasks(false) was broken.
BUG=chromium:585949
LOG=Y
TEST=ScopedMicrotasks
Review URL: https://codereview.chromium.org/1741893003
Cr-Commit-Position: refs/heads/master@{#34504}
Reason for revert:
[Sheriff] Speculative. Seems to break a bunch of webkit tests and causes timeouts:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/5103
Please rebase upstream if intended.
Original issue's description:
> Introduce v8::MicrotasksScope.
>
> This scope is used to control microtasks execution when MicrotasksPolicy::kScoped is engaged.
>
> BUG=chromium:585949
> LOG=Y
> TEST=ScopedMicrotasks
>
> Committed: https://crrev.com/db77cec242dbdf8ee26da8232fa930270429f253
> Cr-Commit-Position: refs/heads/master@{#34472}
TBR=jochen@chromium.org,adamk@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:585949
Review URL: https://codereview.chromium.org/1762943002
Cr-Commit-Position: refs/heads/master@{#34480}
This scope is used to control microtasks execution when MicrotasksPolicy::kScoped is engaged.
BUG=chromium:585949
LOG=Y
TEST=ScopedMicrotasks
Review URL: https://codereview.chromium.org/1741893003
Cr-Commit-Position: refs/heads/master@{#34472}
This gets rid of the JavaScript wrapper. That way we can more quickly handle non-JSReceivers and indexed properties; and don't need to optimize the JavaScript wrapper either.
BUG=
Review URL: https://codereview.chromium.org/1742283002
Cr-Commit-Position: refs/heads/master@{#34356}
This calback is run after an attempt to run microtasks.
BUG=chromium:585949
LOG=Y
Review URL: https://codereview.chromium.org/1731773005
Cr-Commit-Position: refs/heads/master@{#34305}
This new callback is similar to CallCompletedCallback, but is executed before the call has been made.
Added Isolate* parameter to CallCompletedCallback, marking previous one as deprecated.
BUG=chromium:585949
LOG=Y
Review URL: https://codereview.chromium.org/1689863002
Cr-Commit-Position: refs/heads/master@{#34167}
Previously ObjectTemplate::New() logic relied on the fact that all the accessor properties are already installed in the initial map of the function object of the constructor FunctionTemplate.
When the FunctionTemplate were instantiated the accessors of the instance templates from the whole inheritance chain were accumulated and added to the initial map.
ObjectTemplate::SetSetAccessor() used to explicitly ensure that the ObjectTemplate has a constructor and therefore an initial map to add all accessors to.
The new approach is to add all the accessors and data properties to the object exactly when the ObjectTemplate is instantiated. In order to keep it fast we now cache the object boilerplates in the Isolate::template_instantiations_cache (the former function_cache), so the object creation turns to be a deep copying of the boilerplate object.
BUG=chromium:579009
LOG=Y
Committed: https://crrev.com/6a118774244d087b5979e9291d628a994f21d59d
Cr-Commit-Position: refs/heads/master@{#33674}
Review URL: https://codereview.chromium.org/1642223003
Cr-Commit-Position: refs/heads/master@{#33798}
This removes --harmony-completion, --harmony-concat-spreadable, and
--harmony-tolength and moves the appropriate tests from harmony/ to es6/.
Review URL: https://codereview.chromium.org/1667453002
Cr-Commit-Position: refs/heads/master@{#33712}
Reason for revert:
Fails a lot of layout tests and blocks the roll. Can be easily reproduced with a local Chromium checkout.
Reference: https://codereview.chromium.org/1652413003/
Original issue's description:
> [api] Make ObjectTemplate::SetNativeDataProperty() work even if the ObjectTemplate does not have a constructor.
>
> Previously ObjectTemplate::New() logic relied on the fact that all the accessor properties are already installed in the initial map of the function object of the constructor FunctionTemplate.
> When the FunctionTemplate were instantiated the accessors of the instance templates from the whole inheritance chain were accumulated and added to the initial map.
> ObjectTemplate::SetSetAccessor() used to explicitly ensure that the ObjectTemplate has a constructor and therefore an initial map to add all accessors to.
>
> The new approach is to add all the accessors and data properties to the object exactly when the ObjectTemplate is instantiated. In order to keep it fast we now cache the object boilerplates in the Isolate::template_instantiations_cache (the former function_cache), so the object creation turns to be a deep copying of the boilerplate object.
>
> This CL also prohibits non-primitive properties in ObjectTemplate to avoid potential cross-context leaks.
>
> BUG=chromium:579009
> LOG=Y
>
> Committed: https://crrev.com/6a118774244d087b5979e9291d628a994f21d59d
> Cr-Commit-Position: refs/heads/master@{#33674}
TBR=verwaest@chromium.org,ishell@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:579009
Review URL: https://codereview.chromium.org/1660263003
Cr-Commit-Position: refs/heads/master@{#33698}
Previously ObjectTemplate::New() logic relied on the fact that all the accessor properties are already installed in the initial map of the function object of the constructor FunctionTemplate.
When the FunctionTemplate were instantiated the accessors of the instance templates from the whole inheritance chain were accumulated and added to the initial map.
ObjectTemplate::SetSetAccessor() used to explicitly ensure that the ObjectTemplate has a constructor and therefore an initial map to add all accessors to.
The new approach is to add all the accessors and data properties to the object exactly when the ObjectTemplate is instantiated. In order to keep it fast we now cache the object boilerplates in the Isolate::template_instantiations_cache (the former function_cache), so the object creation turns to be a deep copying of the boilerplate object.
This CL also prohibits non-primitive properties in ObjectTemplate to avoid potential cross-context leaks.
BUG=chromium:579009
LOG=Y
Review URL: https://codereview.chromium.org/1642223003
Cr-Commit-Position: refs/heads/master@{#33674}
When accessor getter callback is called the v8::PropertyCallbackInfo::ShouldThrowOnError() is always false, since according to ES6 there's no difference between strict and non-strict property loads. For the setter case the v8::PropertyCallbackInfo::ShouldThrowOnError() returns true if the property is set in strict context.
Interceptors follow same idea: for getter, enumerator and query callbacks the v8::PropertyCallbackInfo::ShouldThrowOnError() is always false, and for setter and deleter callback the v8::PropertyCallbackInfo::ShouldThrowOnError() returns true in strict context.
This CL also cleans up the CallApiGetterStub and removes bogus asserts from [arm] Push(reg1, reg2, ..., regN) that prevented from pushing a set of registers containing duplicates.
BUG=v8:4267
LOG=Y
Committed: https://crrev.com/1d3e837fcbbd9d9fd5e72dfe85dfd47c025f3c9f
Cr-Commit-Position: refs/heads/master@{#33438}
Review URL: https://codereview.chromium.org/1587073003
Cr-Commit-Position: refs/heads/master@{#33461}
Reason for revert:
[Sheriff] Breaks layout tests. Please fix upstream.
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/4077
Original issue's description:
> Array length reduction should throw in strict mode if it can't delete an element.
>
> When accessor getter callback is called the v8::PropertyCallbackInfo::ShouldThrowOnError() is always false, since according to ES6 there's no difference between strict and non-strict property loads. For the setter case the v8::PropertyCallbackInfo::ShouldThrowOnError() returns true if the property is set in strict context.
>
> Interceptors follow same idea: for getter, enumerator and query callbacks the v8::PropertyCallbackInfo::ShouldThrowOnError() is always false, and for setter and deleter callback the v8::PropertyCallbackInfo::ShouldThrowOnError() returns true in strict context.
>
> This CL also cleans up the CallApiGetterStub and removes bogus asserts from [arm] Push(reg1, reg2, ..., regN) that prevented from pushing a set of registers containing duplicates.
>
> BUG=v8:4267
> LOG=Y
>
> Committed: https://crrev.com/1d3e837fcbbd9d9fd5e72dfe85dfd47c025f3c9f
> Cr-Commit-Position: refs/heads/master@{#33438}
TBR=verwaest@chromium.org,ishell@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4267
Review URL: https://codereview.chromium.org/1611313003
Cr-Commit-Position: refs/heads/master@{#33444}
When accessor getter callback is called the v8::PropertyCallbackInfo::ShouldThrowOnError() is always false, since according to ES6 there's no difference between strict and non-strict property loads. For the setter case the v8::PropertyCallbackInfo::ShouldThrowOnError() returns true if the property is set in strict context.
Interceptors follow same idea: for getter, enumerator and query callbacks the v8::PropertyCallbackInfo::ShouldThrowOnError() is always false, and for setter and deleter callback the v8::PropertyCallbackInfo::ShouldThrowOnError() returns true in strict context.
This CL also cleans up the CallApiGetterStub and removes bogus asserts from [arm] Push(reg1, reg2, ..., regN) that prevented from pushing a set of registers containing duplicates.
BUG=v8:4267
LOG=Y
Review URL: https://codereview.chromium.org/1587073003
Cr-Commit-Position: refs/heads/master@{#33438}
We can return the creation context of the [[BoundTargetFunction]], and
don't need to remember the context in which the function was bound.
R=verwaest@chromium.org
BUG=chromium:535408
LOG=n
Review URL: https://codereview.chromium.org/1590273002
Cr-Commit-Position: refs/heads/master@{#33332}
The API functions are always in sloppy mode, so receiver is always a
JSReceiver once the actual call trampoline runs, no need to check again
in various places.
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/1575973006
Cr-Commit-Position: refs/heads/master@{#33258}
According to the ES2015 specification, bound functions are exotic
objects, and thus don't need to be implemented as JSFunctions. So
we introduce a new JSBoundFunction type to represent bound functions
and make them optimizable. This already improves the performance of
calling or constructing bound functions by 10-100x depending on the
use case because we avoid the crazy dance between JavaScript and C++
that was implemented in v8natives.js previously.
There's still room for improvement in the performance of actually
creating bound functions, which is also relevant in practice, but
we already have a plan how to accomplish that later.
The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=chromium:535408, chromium:571299, v8:4629
LOG=n
Committed: https://crrev.com/ca8623eaa468cba65a5adafcdfb4615966f43ce2
Cr-Commit-Position: refs/heads/master@{#33042}
Review URL: https://codereview.chromium.org/1542963002
Cr-Commit-Position: refs/heads/master@{#33044}
Reason for revert:
Breaks arm64 sim nosnap: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20nosnap%20-%20debug/builds/805/steps/Check/logs/function-bind
Original issue's description:
> [runtime] Introduce dedicated JSBoundFunction to represent bound functions.
>
> According to the ES2015 specification, bound functions are exotic
> objects, and thus don't need to be implemented as JSFunctions. So
> we introduce a new JSBoundFunction type to represent bound functions
> and make them optimizable. This already improves the performance of
> calling or constructing bound functions by 10-100x depending on the
> use case because we avoid the crazy dance between JavaScript and C++
> that was implemented in v8natives.js previously.
>
> There's still room for improvement in the performance of actually
> creating bound functions, which is also relevant in practice, but
> we already have a plan how to accomplish that later.
>
> The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
>
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
> BUG=chromium:535408, chromium:571299, v8:4629
> LOG=n
>
> Committed: https://crrev.com/ca8623eaa468cba65a5adafcdfb4615966f43ce2
> Cr-Commit-Position: refs/heads/master@{#33042}
TBR=cbruni@chromium.org,hpayer@chromium.org,yangguo@chromium.org,akos.palfi@imgtec.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:535408, chromium:571299, v8:4629
Review URL: https://codereview.chromium.org/1552473002
Cr-Commit-Position: refs/heads/master@{#33043}
According to the ES2015 specification, bound functions are exotic
objects, and thus don't need to be implemented as JSFunctions. So
we introduce a new JSBoundFunction type to represent bound functions
and make them optimizable. This already improves the performance of
calling or constructing bound functions by 10-100x depending on the
use case because we avoid the crazy dance between JavaScript and C++
that was implemented in v8natives.js previously.
There's still room for improvement in the performance of actually
creating bound functions, which is also relevant in practice, but
we already have a plan how to accomplish that later.
The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=chromium:535408, chromium:571299, v8:4629
LOG=n
Review URL: https://codereview.chromium.org/1542963002
Cr-Commit-Position: refs/heads/master@{#33042}
Add API-accessors for [[ProxyTarget]], [[ProxyHandler]]. Additionally
create new proxies and revoke proxies via the API.
BUG=v8:1543
LOG=n
Review URL: https://codereview.chromium.org/1542943002
Cr-Commit-Position: refs/heads/master@{#33013}
The TypeOfStub didn't test the undetectable bit properly if the instance
was also callable, and therefore returned "object" for document.all
(which is both undetectable and callable).
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
R=yangguo@chromium.org
BUG=chromium:567998
LOG=n
Committed: https://crrev.com/02cc310370df7e51ac4f705038820066fdfd0cdc
Cr-Commit-Position: refs/heads/master@{#32852}
Review URL: https://codereview.chromium.org/1527863003
Cr-Commit-Position: refs/heads/master@{#32883}
The TypeOfStub didn't test the undetectable bit properly if the instance
was also callable, and therefore returned "object" for document.all
(which is both undetectable and callable).
R=yangguo@chromium.org
BUG=chromium:567998
LOG=n
Review URL: https://codereview.chromium.org/1527863003
Cr-Commit-Position: refs/heads/master@{#32852}
Reason for revert:
Need to figure out a better solution for this.
Original issue's description:
> Removes the Callee parameter from FunctionCallbackInfo.
>
> This will help us to instantiate AccessorPair's getters and setters only when they are needed.
>
> BUG=
>
> Committed: https://crrev.com/2fe34ebdcdee0f21b88daa4098a7918e91abb8fb
> Cr-Commit-Position: refs/heads/master@{#32759}
TBR=jochen@chromium.org,verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1520843002
Cr-Commit-Position: refs/heads/master@{#32787}
This will help us to instantiate AccessorPair's getters and setters only when they are needed.
BUG=
Review URL: https://codereview.chromium.org/1510483002
Cr-Commit-Position: refs/heads/master@{#32759}
This is in preparation for turning the flag off by default.
BUG=chromium:552100
LOG=n
Review URL: https://codereview.chromium.org/1511293002
Cr-Commit-Position: refs/heads/master@{#32729}
- Except 2x applications of ForceSet, where I still need to debug
why the expected replacement doesn't work as expected.
- Ca. 3/4 of the file is covered.
R=jochen@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1516483002
Cr-Commit-Position: refs/heads/master@{#32714}
The test expectations should fail consistently in both release and debug
builds. DCHECK is only meant for debug-only checks in production code.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1506753002
Cr-Commit-Position: refs/heads/master@{#32639}
Having beefed up GetKeys() to support everything, use it for everything now.
This fixes Object.getOwnPropertyNames and Object.getOwnPropertySymbols for
Proxies, and gets rid of a bunch of code duplication.
BUG=v8:1543
LOG=n
Review URL: https://codereview.chromium.org/1498593006
Cr-Commit-Position: refs/heads/master@{#32620}
Split out of PropertyAttributes, and used for all filtering purposes.
Also moved PropertyAttributes into the v8::internal:: namespace.
No change in behavior intended.
Review URL: https://codereview.chromium.org/1492653004
Cr-Commit-Position: refs/heads/master@{#32525}
* Add a sibling interface to InterpreterAssembler called
CodeStubAssembler which provides a wrapper around the
RawMachineAssembler and is intented to make it easy to build
efficient cross-platform code stubs. Much of the implementation
of CodeStubAssembler is shamelessly stolen from the
InterpreterAssembler, and the idea is to eventually merge the
two interfaces somehow, probably moving the
InterpreterAssembler interface over to use the
CodeStubAssembler. Short-term, however, the two interfaces
shall remain decoupled to increase our velocity developing the
two systems in parallel.
* Implement the StringLength stub in TurboFan with the new
CodeStubAssembler. Replace and remove the old Hydrogen-stub
version.
* Remove a whole slew of machinery to support JavaScript-style
code stub generation, since it ultimately proved unwieldy,
brittle and baroque. This cleanup includes removing the shared
code stub context, several example stubs and a tangle of build
file changes.
BUG=v8:4587
LOG=n
Review URL: https://codereview.chromium.org/1475953002
Cr-Commit-Position: refs/heads/master@{#32508}
This replaces internal GetConstructorName with toStringTag, .constructor's name
and class_name. This entirely changes how the name is computed for use in
devtools.
BUG=chromium:529177
LOG=n
Review URL: https://codereview.chromium.org/1435273002
Cr-Commit-Position: refs/heads/master@{#32374}
Moves all files related to AST and scopes into ast/,
and all files related to scanner & parser to parsing/.
Also eliminates a couple of spurious dependencies.
R=mstarzinger@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1481613002
Cr-Commit-Position: refs/heads/master@{#32351}
Following logic is using for getting function name in JSFunction::GetDebugName:
1. if function has displayName and its type is string then use it
2. if function has defined property Function.name as value and its type string then use it
3. otherwise use SharedFunctionInfo::DebugName as functionName.
JSFunction::GetDebugName is exposed in V8 API and in FunctionMirror interface.
BUG=chromium:17356
R=yangguo@chromium.org,mstarzinger@chromium.org
LOG=Y
Review URL: https://codereview.chromium.org/1449473005
Cr-Commit-Position: refs/heads/master@{#32124}
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}
It was originally shipped in https://crrev.com/eef2b9b09723ba1dae3ec0172341e93e9030ada0,
but was reverted due to poor interaction with Blink.
That interaction seems to be fixed thanks to changes to the V8 API
and to @@toStringTag handling on access-checked objects.
BUG=v8:3502
LOG=y
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.v8:v8_linux_nosnap_rel;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1406293011
Cr-Commit-Position: refs/heads/master@{#31846}
This matches the approach used for @@isConcatSpreadable, and seems to
match what Mozilla is planning to do in Firefox.
Given that there's already little compatibility around cross-origin toString
results, there seems to be little hazard in making this change even before
spec language hits the HTML spec.
BUG=v8:3502, v8:4289, chromium:532469
LOG=n
Review URL: https://codereview.chromium.org/1432543002
Cr-Commit-Position: refs/heads/master@{#31755}
The calling context is the second top-most non-debugger context on the
stack, but that's not necessarily the actually calling context, e.g.,
when a tail-call was used.
BUG=chromium:541703
R=verwaest@chromium.org
LOG=y
Review URL: https://codereview.chromium.org/1431473003
Cr-Commit-Position: refs/heads/master@{#31719}
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}
Scavenger should not attempt to visit ArrayBuffer's storage, it is a
user-supplied pointer that may have any alignment. Visiting it, may
result in a crash.
BUG=
R=jochen
Review URL: https://codereview.chromium.org/1406133003
Cr-Commit-Position: refs/heads/master@{#31611}
Also clean up the access check, which was doing too much.
This is in preparation of implementing Reflect.getPrototypeOf.
BUG=
Review URL: https://codereview.chromium.org/1402973002
Cr-Commit-Position: refs/heads/master@{#31434}
This reverts commit 24aca87090.
The API makes these values appear to be per-isolate, when in fact
they are per-context. Installing the results of these on Template
objects instantiated in multiple contexts can result in security
violations and contexts being retained indefinitely.
An alternative mechanism for using these in a sensible way is
provided by https://crrev.com/1409593002
BUG=
LOG=N
R=jochen@chromium.org, adamk@chromium.org
Review URL: https://codereview.chromium.org/1415663002
Cr-Commit-Position: refs/heads/master@{#31417}
For now, only rewire builtins in v8natives.js to call the new runtime functions.
Review URL: https://codereview.chromium.org/1409613004
Cr-Commit-Position: refs/heads/master@{#31413}
This is in preparation to enabling --turbo-inlining by default, fixing
various issues when general purpose inlining is running against our
entire test suite.
R=bmeurer@chromium.org
BUG=v8:4493
LOG=n
Review URL: https://codereview.chromium.org/1407533004
Cr-Commit-Position: refs/heads/master@{#31294}
Allow access to Array Iterator through the API, in order to simplify
setting up interfaces which use these methods. This applies to
WebIDL interfaces with "length" attributes returning integer types and
a getter taking an unsigned long type.
BUG=
LOG=N
R=adamk@chromium.org
Review URL: https://codereview.chromium.org/1378403004
Cr-Commit-Position: refs/heads/master@{#31152}
Symbols marked as "well-known" now return an undefined value when loaded with a failed access check, instead of throwing.
Currently, only @@isConcatSpreadable is marked as well-known, until the correct behaviour is properly specified.
BUG=v8:4289, 507553
LOG=N
R=adamk@chromium.org, jochen@chromium.org, verwaest@chromium.org
Review URL: https://codereview.chromium.org/1230793002
Cr-Commit-Position: refs/heads/master@{#31131}
Reason for revert:
[Sheriff] Speculative revert due to crbug.com/539814
Original issue's description:
> Changed scavenge GC to collect unmodified references
>
> Added a scavenge GC pass that collects unmodified references instead of
> processing object groups. This mode can be controlled by setting
> FLAG_scavenge_remove_unmodified_objects. By default this is turned off.
> Also, modified a test case to suit the handle the new GC pass.
>
> BUG=v8:4421
> LOG=N
>
> Committed: https://crrev.com/6254019238a853c9f3c09d615ba153043f6957c7
> Cr-Commit-Position: refs/heads/master@{#31102}
TBR=jochen@chromium.org,rmcilroy@chromium.org,mythria@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4421,chromium:539814
Review URL: https://codereview.chromium.org/1388133002
Cr-Commit-Position: refs/heads/master@{#31130}
The --abort-on-uncaught-exception command line switch makes
Isolate::Throw abort if the error being thrown cannot be caught by a
try/catch block.
Embedders may want to use other mechanisms than try/catch blocks to
handle uncaught exceptions. For instance, Node.js has "domain" objects
that have error handlers that can handle uncaught exception like
following:
var d = domain.create();
d.on('error', function onError(err) {
console.log('Handling error');
});
d.run(function() {
throw new Error("boom");
});
These error handlers are called by isolates' message listeners.
If --abort-on-uncaught-exception is *not* used, the isolate's
message listener will be called, which will in turn call the domain's
error handler. The process will output 'Handling error' and will exit
successfully (not due to an uncaught exception). This is the behavior
that Node.js users expect.
However, if --abort-on-uncaught-exception is used and when throwing an
error within a domain that has an error handler, the process will abort
and the domain's error handler will not be called. This is not the
behavior that Node.js users expect.
Having a SetAbortOnUncaughtExceptionCallback API allows embedders to
determine when it's not appropriate to abort and instead handle the
exception via the isolate's message listener.
In the example above, Node.js would set a custom callback with
SetAbortOnUncaughtExceptionCallback that would be implemented as
following (the sample code has been simplified to remove what's not
relevant to this change):
bool ShouldAbortOnUncaughtException(Isolate* isolate) {
return !IsDomainActive();
}
Now when --abort-on-uncaught-exception is used, Isolate::Throw would
call that callback and determine that it should not abort if a domain
with an error handler is active. Instead, the isolate's message listener
would be called and the error would be handled by the domain's error
handler.
I believe this can also be useful for other embedders.
BUG=
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1375933003
Cr-Commit-Position: refs/heads/master@{#31111}
Added a scavenge GC pass that collects unmodified references instead of
processing object groups. This mode can be controlled by setting
FLAG_scavenge_remove_unmodified_objects. By default this is turned off.
Also, modified a test case to suit the handle the new GC pass.
BUG=v8:4421
LOG=N
Review URL: https://codereview.chromium.org/1358703003
Cr-Commit-Position: refs/heads/master@{#31102}
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}
This adds a utils object meant specifically for V8 extras, presenting a limited
API surface for doing things that would otherwise require %-functions.
BUG=v8:4276
LOG=Y
R=jochen@chromium.org,yangguo@chromium.org
Review URL: https://codereview.chromium.org/1343113003
Cr-Commit-Position: refs/heads/master@{#30773}
This removes the aforementioned flag which has been on by default for a
while now. Note that this does not control optimization decisions, only
the last-resort bailout in the graph builder.
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1335543002
Cr-Commit-Position: refs/heads/master@{#30673}
Similar to DELETE, the IN builtin is just a thin wrapper for %HasElement
and %HasProperty anyway, and cannot be optimized, plus it had a weird
special fast case (which also involved at least one LOAD_IC plus some
intrinsic magic).
R=yangguo@chromium.org,jarin@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_win_nosnap_shared_rel
Committed: https://crrev.com/72d60a1e80e81e2e68ca402665e2acbc46c5e471
Cr-Commit-Position: refs/heads/master@{#30154}
Review URL: https://codereview.chromium.org/1295433002
Cr-Commit-Position: refs/heads/master@{#30582}
This turns the has_instance_call_handler bit on Map into an is_callable
bit, that matches the spec definition of IsCallable (i.e. instances have
[[Call]] internal methods).
Also fix the typeof operator to properly say "function" for everything
that is callable.
Also remove the (unused) premature %_GetPrototype optimization from
Crankshaft, which just complicated the Map bit swap.
R=mstarzinger@chromium.org, rossberg@chromium.org, yangguo@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_layout_dbg
Review URL: https://codereview.chromium.org/1316933002
Cr-Commit-Position: refs/heads/master@{#30552}
Use the correct sNaN value on mips32r6 also.
TEST=test-api/QuietSignalingNaNs,test-api/Threading1
BUG=
Review URL: https://codereview.chromium.org/1311473007
Cr-Commit-Position: refs/heads/master@{#30510}
Reason for revert:
Breaks http://build.chromium.org/p/client.v8/builders/V8%20Arm%20-%20debug%20-%202/builds/2372
Original issue's description:
> [heap] GC flag cleanup/restructuring.
>
> * GC's flags are now proper flags and not int.
> * Callback flags are not threaded through but only set once like gc flags
> * Callers of methods that trigger GCs need to pass a reason when not using
> the default parameters.
>
> Furthermore, each GC invocation can be passed the GC and GCCallback flags. We
> usually override the currently set flags upon finishing a GC cylce, but are able
> to restore the previously set if desired. This is useful for explicitely
> triggered scavenges or external requests that interrupt the current behaviour.
>
> BUG=
>
> Committed: https://crrev.com/f4f3b431b9ce0778d926acf03c0d36dae5c0cba4
> Cr-Commit-Position: refs/heads/master@{#30457}
TBR=hpayer@chromium.org,yangguo@chromium.org,mlippautz@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1303393004
Cr-Commit-Position: refs/heads/master@{#30463}
* GC's flags are now proper flags and not int.
* Callback flags are not threaded through but only set once like gc flags
* Callers of methods that trigger GCs need to pass a reason when not using
the default parameters.
Furthermore, each GC invocation can be passed the GC and GCCallback flags. We
usually override the currently set flags upon finishing a GC cylce, but are able
to restore the previously set if desired. This is useful for explicitely
triggered scavenges or external requests that interrupt the current behaviour.
BUG=
Review URL: https://codereview.chromium.org/1314863003
Cr-Commit-Position: refs/heads/master@{#30457}
FutexEmulation::Wait can potentially block forever on a condition variable. We
want to allow this to be interrupted (for a debugger, or to terminate the
thread, for example).
The previous implementation would periodically wake up the waiter to check for
interrupts. This CL modifies the StackGuard so it wakes the blocked futex if
the thread should be interrupted.
BUG=chromium:497295
R=jarin@chromium.org
LOG=n
Review URL: https://codereview.chromium.org/1230303005
Cr-Commit-Position: refs/heads/master@{#30311}
Embedders would use these for features which must be able to be turned
off at runtime, despite being compiled into V8. They can be turned on
and off by the embedder using the --experimental_extras flag, e.g. via
v8::SetFlagsFromString.
R=yangguo@chromium.org, mlippautz@chromium.org, hpayer@chromium.org
BUG=chromium:507137
LOG=Y
Review URL: https://codereview.chromium.org/1284413002
Cr-Commit-Position: refs/heads/master@{#30260}
Reason for revert:
Breaks win32 nosnap
Original issue's description:
> [runtime] Remove useless IN builtin.
>
> Similar to DELETE, the IN builtin is just a thin wrapper for %HasElement
> and %HasProperty anyway, and cannot be optimized, plus it had a weird
> special fast case (which also involved at least one LOAD_IC plus some
> intrinsic magic).
>
> R=yangguo@chromium.org,jarin@chromium.org
>
> Committed: https://crrev.com/72d60a1e80e81e2e68ca402665e2acbc46c5e471
> Cr-Commit-Position: refs/heads/master@{#30154}
TBR=yangguo@chromium.org,jarin@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1288923002
Cr-Commit-Position: refs/heads/master@{#30155}
Similar to DELETE, the IN builtin is just a thin wrapper for %HasElement
and %HasProperty anyway, and cannot be optimized, plus it had a weird
special fast case (which also involved at least one LOAD_IC plus some
intrinsic magic).
R=yangguo@chromium.org,jarin@chromium.org
Review URL: https://codereview.chromium.org/1295433002
Cr-Commit-Position: refs/heads/master@{#30154}
The DELETE builtin calls through to %DeleteProperty anyway, so we
can as well skip the builtin completely and always call into the
runtime directly. Also add different entries depending on whether
calling code is in sloppy or strict/strong mode.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1291973002
Cr-Commit-Position: refs/heads/master@{#30148}
TurboFan is now a requirement and supported by all backends, so we don't
need those macros (plus all the machinery on top) anymore.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1282763002
Cr-Commit-Position: refs/heads/master@{#30082}
We missed a check whether we can actually do incremental marking when starting
it on reaching the external allocation limit.
BUG=chromium:517195
LOG=N
Review URL: https://codereview.chromium.org/1274983002
Cr-Commit-Position: refs/heads/master@{#30043}
This is only an estimate since it counts objects that could be shared,
for example strings, cow arrays, heap numbers, etc.
It however ignores objects that could be shared, but may only be used
by the context to be measured, for example shared function infos,
script objects, scope infos, etc.
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/1268333004
Cr-Commit-Position: refs/heads/master@{#30029}
There is only one use case for it: String.prototype.search converts a
string argument into a RegExp. The cache is used to avoid repeating that
conversion. However, this does not make the added complexity worthwhile.
Review URL: https://codereview.chromium.org/1267493006
Cr-Commit-Position: refs/heads/master@{#29985}
The idle time handler should never return DONE or DO_SCAVENGE for
background tabs. Upon receiving DONE chrome will stop sending idle notifications.
BUG=chromium:515174
LOG=NO
Review URL: https://codereview.chromium.org/1269583002
Cr-Commit-Position: refs/heads/master@{#29926}
The background parser checks for debugger state in its constructor. This
is not good enough, since the debugger state may change afterwards, but
before compiling takes place. As the background parser can only parse
lazily, this could mean that due to debugging, we try to eagerly compile
an inner function we have not eagerly parsed.
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/1247743002
Cr-Commit-Position: refs/heads/master@{#29784}
These were added when I thought they would be useful in Blink, but as
it turned out they were not. They could likely be deleted immediately,
but to play it safe I'll go through the usual deprecation process.
Review URL: https://codereview.chromium.org/1236263004
Cr-Commit-Position: refs/heads/master@{#29690}
Until now, TF-generated code stubs piggy-backed off of the builtin
context. Since generation of code stubs is lazy, stubs generated at
different times in different native contexts would contain embedded
pointers different builtin contexts, leading to cross-context references
and memory leaks.
After this CL, all TF-generated code stubs are generated inside a
internal thinned-out, native context that lives solely for the
purpose of hosting generated code stubs.
Review URL: https://codereview.chromium.org/1213203007
Cr-Commit-Position: refs/heads/master@{#29593}
`WriteUtf16Slow` should not assume that the output buffer has enough
bytes to hold both words of surrogate pair. It should pass the number of
remaining bytes to the `Utf8::ValueOf` instead, just as we already do in
`Utf8DecoderBase::Reset`. Otherwise it will attempt to write the trail
uint16_t past the buffer boundary, leading to memory corruption and
possible crash.
Originally reported by: Kris Reeves <kris.re@bbhmedia.com>
BUG=v8:4274
R=danno
R=svenpanne
LOG=y
Review URL: https://codereview.chromium.org/1226493003
Cr-Commit-Position: refs/heads/master@{#29485}
The only right way to enable access checks is to install access check callbacks on an object template via v8::ObjectTemplate::SetAccessCheckCallbacks(). It does not make sense to enable access checks on an arbitrary object.
Review URL: https://codereview.chromium.org/1217893012
Cr-Commit-Position: refs/heads/master@{#29439}
This change changes bootstrapping semantics for intercepted global objects. Unlike before, we'll now also call into the interceptor during bootstrapping. This affects properties loaded from within the runtime, such as global.Array and global.Symbol. The embedder will need to make sure that those values are the expected values during bootstrapping.
BUG=chromium:505998
LOG=n
Review URL: https://codereview.chromium.org/1220813005
Cr-Commit-Position: refs/heads/master@{#29414}
Map: get, set, has, delete, clear
Set: add, has, delete, clear
All except clear are implemented as calls into collection.js.
Note that some of these shadow methods of v8::Object. It's unclear
how confusing that's going to be: on the one hand, it seems likely
that most operations you would want to do on a Map or Set are these.
On the other, generic code could get confused if it somehow gets
ahold of a variable that happens to be C++-typed as a v8::Map or v8::Set.
BUG=v8:3340
LOG=y
Review URL: https://codereview.chromium.org/1204623002
Cr-Commit-Position: refs/heads/master@{#29237}
Reason:
Regressions in various benchmarks.
Revert "Revert of Revert of [strong] Implement strong mode restrictions on property access (patchset #1 id:1 of https://codereview.chromium.org/1189153002/)"
This reverts commit 41405c0470.
Revert "X87: Revert of Revert of [strong] Implement strong mode restrictions on property access."
This reverts commit 48de5f4d6b.
Revert "Fix overlapping KeyedLoadIC bitfield."
This reverts commit 4e6c956abf.
Revert "MIPS64: Fix 'Revert of Revert of [strong] Implement strong mode restrictions on property access'."
This reverts commit 74f97b0d2a.
BUG=
Review URL: https://codereview.chromium.org/1199493002
Cr-Commit-Position: refs/heads/master@{#29166}
Implements the strong mode proposal's restrictions on property access.
To be fully explored in a followup: proxies, interceptors, access checks, load from super
BUG=v8:3956
LOG=N
Review URL: https://codereview.chromium.org/1168093002
Cr-Commit-Position: refs/heads/master@{#29109}
This invariant will save us some head ache.
The changes to test-debug/DebugStub is due to the fact that it abuses
the ability to set break points in code that has no debug break slots.
This is now no longer possible.
R=ulan@chromium.org
BUG=v8:4132
LOG=N
Review URL: https://codereview.chromium.org/1181013007
Cr-Commit-Position: refs/heads/master@{#29038}
The alternative of passing an object template at context creation is
unfeasible because we need a context to instantiate the template.
At the time we create the context from snapshot or bootstrap from
scratch, we would already need that template instance, leading to a
chicken-and-egg problem.
This is an alternative that is simpler and less intrusive.
R=domenic@chromium.org, jochen@chromium.org
Review URL: https://codereview.chromium.org/1182443002
Cr-Commit-Position: refs/heads/master@{#28938}
This will significantly simplify the serialization code, as well
as speeding it up (by triggering only a single allocation instead of O(size)
allocations).
BUG=chromium:478263
LOG=y
Review URL: https://codereview.chromium.org/1157843006
Cr-Commit-Position: refs/heads/master@{#28793}
This also fixes issues with
- kMaxUint32 being a valid length but not index cornercases
- exotic integer objects masking "exotic indexes" even though its in the prototype chain
- concating of holey sloppy arguments
BUG=v8:4137
LOG=n
Review URL: https://codereview.chromium.org/1159433003
Cr-Commit-Position: refs/heads/master@{#28754}
The Map and Set maps get overwritten when collection.js executes, so in
a nosnap build we have to wait until it runs before we grab the maps.
To facilitate that, store the functions in the native context as well.
Review URL: https://codereview.chromium.org/1161363002
Cr-Commit-Position: refs/heads/master@{#28743}
Implements the strong mode proposal's restrictions on the behaviour of the
delete operator for strong objects.
Setting the strong bit is still wip, so this change will only affect those
objects that have the bit correctly set. The tests reflect this, and will be
expanded as more objects can be marked as strong.
Attempt 2, last version did not work with API.
BUG=v8:3956
LOG=N
Review URL: https://codereview.chromium.org/1156573002
Cr-Commit-Position: refs/heads/master@{#28724}
These are similar to the Map/Set constructors when called with an array,
except that they are guaranteed to be side-effect free if called with
a packed array.
This will be useful in implementing structured clone which, as
specified in HTML, speaks in terms of the internal [[MapData]]
and [[SetData]] slots without going through the exposed iteration
ES semantics.
BUG=v8:3340
LOG=y
Review URL: https://codereview.chromium.org/1155893003
Cr-Commit-Position: refs/heads/master@{#28642}
These return arrays representing the current contents of the given
Map/Set. They are similar to what would be returned by the JS code:
Array.from(collection)
except that they are guaranteed side-effect free.
This will be useful in implementing structured clone which, as
specified in HTML, speaks in terms of the internal [[MapData]]
and [[SetData]] slots without going through the exposed iteration
ES semantics.
BUG=v8:3340
LOG=y
Review URL: https://codereview.chromium.org/1148383007
Cr-Commit-Position: refs/heads/master@{#28640}
Only supports constructing new objects and returning size.
Followup patch will need to add ability to retrieve and
set contents in order to support structured clone.
Also removes a bunch of outdated "experimental" markers from v8.h.
BUG=v8:3340
LOG=y
Review URL: https://codereview.chromium.org/1157453002
Cr-Commit-Position: refs/heads/master@{#28637}
* Hash code is now just done with a private own symbol instead of the hidden string, which predates symbols.
* In the long run we should do all hidden properties this way and get rid of the
hidden magic 0-length string with the zero hash code. The advantages include
less complexity and being able to do things from JS in a natural way.
* Initially, the performance of weak set regressed, because it's a little harder
to do the lookup in C++. Instead of heroics in C++ to make things faster I
moved some functionality into JS and got the performance back. JS is supposed to be good at looking up named properties on objects.
* This also changes hash codes of Smis so that they are always Smis.
Performance figures are in the comments to the code review. Summary: Most of js-perf-test/Collections is neutral. Set and Map with object keys are 40-50% better. WeakMap is -5% and WeakSet is +9%. After the measurements, I fixed global proxies, which cost 1% on most tests and 5% on the weak ones :-(.
In the code review comments is a patch with an example of the heroics we could do in C++ to make lookup faster (I hope we don't have to do this. Instead of checking for the property, then doing a new lookup to insert it, we could do one lookup and handle the addition immediately). With the current benchmarks above this buys us nothing, but if we go back to doing more lookups in C++ instead of in stubs and JS then it's a win.
In a similar vein we could give the magic zero hash code to the hash code
symbol. Then when we look up the hash code we would sometimes see the table
with all the hidden properties. This dual use of the field for either the hash
code or the table with all hidden properties and the hash code is rather ugly,
and this CL gets rid of it. I'd be loath to bring it back. On the benchmarks quoted above it's slightly slower than moving the hash code lookup to JS like in this CL.
One worry is that the benchmark results above are more monomorphic than real
world code, so may be overstating the performance benefits of moving to JS. I
think this is part of a general issue we have with handling polymorphic code in
JS and any solutions there will benefit this solution, which boils down to
regular property access. Any improvement there will lift all boats.
R=adamk@chromium.org, verwaest@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1149863005
Cr-Commit-Position: refs/heads/master@{#28622}
This adds a new external type (v8::SharedArrayBuffer) that uses a JSArrayBuffer
under the hood. It can be distinguished from an ArrayBuffer by the newly-added
is_shared() bit.
Currently there is no difference in functionality between a SharedArrayBuffer
and an ArrayBuffer. However, a future CL will add the Atomics API, which is
only available on an SharedArrayBuffer. All non-atomic accesses are identical
to ArrayBuffer accesses.
LOG=N
BUG=
Review URL: https://codereview.chromium.org/1136553006
Cr-Commit-Position: refs/heads/master@{#28594}
Deleting an in-bounds character index from a String object should always return
false.
BUG=
LOG=N
Review URL: https://codereview.chromium.org/1153673003
Cr-Commit-Position: refs/heads/master@{#28592}
Reason for revert:
breaks build
Original issue's description:
> Implement SharedArrayBuffer.
>
> This adds a new external type (v8::SharedArrayBuffer) that uses a JSArrayBuffer under the hood. It can be distinguished from an ArrayBuffer by the newly-added is_shared() bit.
>
> Currently there is no difference in functionality between a SharedArrayBuffer and an ArrayBuffer. However, a future CL will add the Atomics API, which is only available on an SharedArrayBuffer. All non-atomic accesses are identical to ArrayBuffer accesses.
>
> BUG=
>
> Committed: https://crrev.com/57170bff7baf341c666252a7f6a49e9c08d51263
> Cr-Commit-Position: refs/heads/master@{#28588}
TBR=jarin@chromium.org,jochen@chromium.org,binji@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1149203003
Cr-Commit-Position: refs/heads/master@{#28589}
This adds a new external type (v8::SharedArrayBuffer) that uses a JSArrayBuffer under the hood. It can be distinguished from an ArrayBuffer by the newly-added is_shared() bit.
Currently there is no difference in functionality between a SharedArrayBuffer and an ArrayBuffer. However, a future CL will add the Atomics API, which is only available on an SharedArrayBuffer. All non-atomic accesses are identical to ArrayBuffer accesses.
BUG=
Review URL: https://codereview.chromium.org/1136553006
Cr-Commit-Position: refs/heads/master@{#28588}
When the page is controlled by a ServiceWorker, the ServiceWorker can return an opaque (non-CORS cross origin) resource response.
We need to treat the messages from such script resource as opaque.
Committed: https://crrev.com/7a599c5e1242d3c5ab7515ee149623da90ae69ec
Cr-Commit-Position: refs/heads/master@{#28445}
Review URL: https://codereview.chromium.org/1140673002
Cr-Commit-Position: refs/heads/master@{#28459}
When the page is controlled by a ServiceWorker, the ServiceWorker can return an opaque (non-CORS cross origin) resource response.
We need to treat the messages from such script resource as opaque.
Review URL: https://codereview.chromium.org/1140673002
Cr-Commit-Position: refs/heads/master@{#28445}
Exposed to the extras as extrasExports (on the builtins object), on
which they can put things that should be accessible from C++. Exposed
to C++ through the V8 API as v8::Context::GetExtrasExportsObject().
Adding a test (in test-api.cc) required adding a simple extra,
test-extra.js, which we build into the standalone builds.
R=yangguo@chromium.org, jochen@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1128113006
Cr-Commit-Position: refs/heads/master@{#28317}
