This avoid introduction of {TypeGuard} nodes during load elimination.
Such type guard could lead to contradicting type information where a
constant {NumberConstant} node was guarded to have {ExternalPointer}
type, which would lead to an impossible constraint on representation
selection.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-752826
BUG=chromium:752826
Change-Id: Ida3815af24ccc8a48474b8d66117b9718f61adda
Reviewed-on: https://chromium-review.googlesource.com/605547
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47218}
This code appears to have been wrong forever, as it only
threw in strict mode (presumably predating ES2015 const).
In order to get exactly the right behavior, special
handling of sloppy named function expressions is required.
Rather than polluting PropertyAttributes with another
dummy value, this CL simply adds a bool output argument
to Context::Lookup to indicate that case.
Bug: v8:6677
Change-Id: I34daa5080d291808f10cbaefc91d716f0b22963b
Reviewed-on: https://chromium-review.googlesource.com/602690
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47207}
The ConstructFunctionForwardVarargs and ConstructForwardVarargs
builtins, which are used when inlining the Reflect.construct
builtin into TurboFan optimized code, didn't properly check the
new.target parameter whether it's a constructor.
Bug: chromium:752481
Change-Id: I9b8f8c429d6eaed0ff8d27fc3f6b52eb906766a2
Reviewed-on: https://chromium-review.googlesource.com/604187
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47206}
This fixes a missing fast-path check in the code-stub implementation of
the {Array.prototype.filter} method. Appending to the target JSArray is
only correct if the underlying length did not change.
R=jgruber@chromium.org
TEST=mjsunit/regress/regress-6657
BUG=v8:6657
Change-Id: Ida8d3511485b649b70d9a4b161742d494ebe4dac
Reviewed-on: https://chromium-review.googlesource.com/600467
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47156}
This behavior has been staged successfully without a bug report, and
has been shipped in the latest versions of Firefox and Safari.
Bug: v8:5070
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I084cae2cc303d6a213bd6789297b91656e162d6b
Reviewed-on: https://chromium-review.googlesource.com/595129
Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47098}
This fixes a corner case of rewriting the transition trees, where the
"interesting symbols" bit was not properly forwarded.
Drive-by-fix: Introduce additional checking in Map::ConnectTransition to
make it easier for clusterfuzz to detect cases we might have missed.
R=mstarzinger@chromium.org
Bug: chromium:751109
Change-Id: I3f1a1e6232db9b3694064b3d4e9f37255b018acc
Reviewed-on: https://chromium-review.googlesource.com/597669
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47075}
Remove opt_count from SFI, which only had two real uses:
1. Detecting OSR in tests -- replaced with a stack walk in
%GetOptimizationStatus
2. Naming optimization log files -- replaced with the
optimization id
This allows us to remove a field from the SFI, moving the
bailout reason into the counters field.
As a drive-by, add optimization marker information (e.g.
marked for optimization) to the optimization status.
Change-Id: Id77deb5dd5439dfba058a7e1e1748de26b717d0d
Reviewed-on: https://chromium-review.googlesource.com/592028
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47009}
Everything inside a class lives inside the class scope, so
reparenting the class scope is the only operation that
should be done to ClassLiterals during reparenting.
Bug: chromium:740591
Change-Id: Ia5b96b44ff1ca6cfa274effb5a04651809bab9bd
Reviewed-on: https://chromium-review.googlesource.com/588054
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46951}
This fixes the second-order Array.prototype function {forEach} and {map}
to now perform a callability check of the given callback function. For
empty arrays it is observable whether such a check outside the loop has
been elided or not.
R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-crbug-747062
BUG=chromium:747062
Change-Id: I1bbe7f44b3b3d18e9b41ad0436975434adf84321
Reviewed-on: https://chromium-review.googlesource.com/588893
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46942}
Previously we would shift the length of the string by three, which
could overflow with the new larger string length limit. Now we check
that the length will fit without extra allocation before and after
the shift, because really large strings will never fit, and will
always go to the Checked case.
Bug: chromium:748069, v8:6148
Change-Id: I41cac14b0fde6c5e8ca92305a052cbb743111554
Reviewed-on: https://chromium-review.googlesource.com/584611
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46896}
This brings the wasm-constants.js file inline with that (forked copy) in
the WebAssembly spec repo, which should make it easier to export tests
from V8 to the spec in the future.
R=clemensh@chromium.org
Bug:
Change-Id: I7db23efc2d671f65b614f9dbc97ae2f355f91b04
Reviewed-on: https://chromium-review.googlesource.com/586248
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46894}
Bug: chromium:740591
Change-Id: I869be41d8630b23704b9470c4d3db8a21bbde873
Reviewed-on: https://chromium-review.googlesource.com/583531
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46881}
Empty Array literals are amongst the most commonly used literal types on our
top25 page list. Using a custom bytecode we can drop the boilerplate for empty
Array literals alltogether. However, we still need a proper AllocationSite to
track ElementsKind transitions.
Bug: v8:6211, chromium:746935
Change-Id: I891eaa778e4e81e138e483a65f04ae00ae30bd28
Reviewed-on: https://chromium-review.googlesource.com/580932
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46875}
A Phi is necessary to carry the ElementsKind forward in case transitions
are taken.
Bug: chromium:747075
Change-Id: I9d9d66b0219fe3f67d08536f4d478ee300c76acb
Reviewed-on: https://chromium-review.googlesource.com/583090
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46852}
Now that literal allocation is inlined, it is possible to optimize out regexp
literal allocation completely. If a lazy deopt is triggered in that situation,
the deoptimizer needs to know how to materialize regexp objects.
Bug: v8:6605,v8:6556,chromium:747825
Change-Id: Id491053f8e64fec16540efbfdc6c7c524da3e080
Reviewed-on: https://chromium-review.googlesource.com/582609
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46837}
... in order to avoid the need to update field types through elements
kind transitions.
Bug: chromium:738763, chromium:745844
Change-Id: I9f0e7f321e7f44ab5b36c06dd4c5633611370807
Reviewed-on: https://chromium-review.googlesource.com/581647
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46830}
This reverts commit 6e27386d68.
Reason for revert: There will be another much simpler and
back-mergeable fix.
Original change's description:
> Reland "[runtime] Add shortcuts for elements kinds transitions."
>
> This is a reland of b90e83f5da
> Original change's description:
> > [runtime] Add shortcuts for elements kinds transitions.
> >
> > The shortcuts ensure that field type generalization is properly
> > propagated in the transition graph.
> >
> > Bug: chromium:738763
> > Change-Id: Id701a6f95ed6ea093c707fbe0bac228f1f856e9f
> > Reviewed-on: https://chromium-review.googlesource.com/567992
> > Commit-Queue: Igor Sheludko <ishell@chromium.org>
> > Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#46622}
>
> Bug: chromium:738763, chromium:742346, chromium:742381, chromium:745844
> Change-Id: I93974e3906b2c7710bd525f15037a2dd97f263ad
> Reviewed-on: https://chromium-review.googlesource.com/575227
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46759}
TBR=ulan@chromium.org,jkummerow@chromium.org,ishell@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: chromium:738763, chromium:742346, chromium:742381, chromium:745844
Change-Id: I203dc748c47db554e0a86d61f0e2b7b8b96f2370
Reviewed-on: https://chromium-review.googlesource.com/581547
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46826}
Inlining heuristics in Turbofan used ast node count. Bytecode size
is a better approximation of the size of the graph than the
ast node count. This cl changes the heuristics to use the bytecode
size instead. Also removing the ast_node_count filed in the shared
function info. It was used only for the inlining heuristics.
Also removed the max_inlined_source_size flag which is no longer used.
Bug:
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I8a2d2509c8e8d2779b33b817bb217de203d54ec3
Reviewed-on: https://chromium-review.googlesource.com/570055
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46771}
This is a reland of b90e83f5da
Original change's description:
> [runtime] Add shortcuts for elements kinds transitions.
>
> The shortcuts ensure that field type generalization is properly
> propagated in the transition graph.
>
> Bug: chromium:738763
> Change-Id: Id701a6f95ed6ea093c707fbe0bac228f1f856e9f
> Reviewed-on: https://chromium-review.googlesource.com/567992
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46622}
Bug: chromium:738763, chromium:742346, chromium:742381, chromium:745844
Change-Id: I93974e3906b2c7710bd525f15037a2dd97f263ad
Reviewed-on: https://chromium-review.googlesource.com/575227
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46759}
The test for CanTreatHoleAsUndefined on keyed element access was
checking for stability of Object.prototype and Array.prototype and
even adding stability dependencies on both, which is too restrictive
and leads to unnecessary deoptimizations (and might disable further
optimization of the keyed access depending on the state of the
prototype objects during optimization). This was not intended and
is considered a (performance) bug.
Instead use the correct approach of checking whether the receiver's
prototype is one of the current Object.prototype or Array.prototype
objects (since the Array protector works isolate-wide), and then
check the Array protector and install an appropriate code dependency
on the protector only.
Bug: v8:6607
Change-Id: I0bcfe32813ca3693e7b22de31b03edb3509d0a27
Reviewed-on: https://chromium-review.googlesource.com/574849
Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46743}
The code was already there, but there was a bug in it: Because of the
missing reference, we were only updating a *copy* of the signature map,
hence the update had no effect.
This intentially is a minimal CL, in order to allow for easy
backmerging.
More mitigations and tests are coming in a separate CL.
R=titzer@chromium.org
Change-Id: Ifb462093f4b8f4d5380b6774636537c67c2b676c
Reviewed-on: https://chromium-review.googlesource.com/570278
Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46664}
The tail call implementation is hidden behind the --harmony-tailcalls
flag, which is off-by-default (and has been unstaged since February).
It is known to be broken in a variety of cases, including clusterfuzz
security issues (see sample Chromium issues below). To avoid letting
the implementation bitrot further on trunk, this patch removes it.
Bug: v8:4698, chromium:636914, chromium:724746
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng;master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I9cb547101456a582374fdf7b1a3f044a9ef33e5c
Reviewed-on: https://chromium-review.googlesource.com/569069
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46651}
Removes the --ignition flag which is now on by default. Adds a
--stress-fullcodegen flag which enables running all functions supported
by fullcodegen to be compiled by fullcodegen.
This will enable moving parser internalization later when we are not
stressing fullcodegen or compiling asm.js functions.
BUG=v8:5203, v8:6409, v8:6589
Change-Id: I7fa68016d4e734755434ec0b4e749ef65ffa7f4e
Reviewed-on: https://chromium-review.googlesource.com/565569
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46635}
It's ok that the instance of the called code object is different from
the caller instance. This happens if one instance calls an exported
function of another instance.
R=ahaas@chromium.org
Bug: chromium:739768
Change-Id: I6afa8332a9b33fe32e9332cdca573053f058421d
Reviewed-on: https://chromium-review.googlesource.com/568494
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46624}
The shortcuts ensure that field type generalization is properly
propagated in the transition graph.
Bug: chromium:738763
Change-Id: Id701a6f95ed6ea093c707fbe0bac228f1f856e9f
Reviewed-on: https://chromium-review.googlesource.com/567992
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46622}
This correctly types values loaded via {LoadElement} nodes from arrays
of HOLEY_DOUBLE_ELEMENTS elements kind as {Type::NumberOrHole}. Even
though "the hole" is still encoded as a tagged NaN, the type system
still needs to consider it as a potential hole value.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-736575
BUG=chromium:736575
Change-Id: Ib869284900a4affb2ddaa1d2a96df9443dba6921
Reviewed-on: https://chromium-review.googlesource.com/567180
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46620}
When we abort preparsing, we have to reset the Scope state, to ensure
re-parsing will leave us in the proper Zone. Resetting of rare_data_
was missing, causing this to fail in some cases.
Bug: chromium:740803
Change-Id: I7ce70f9c4670eaf1b76745ae8231eb95625b0f4b
Reviewed-on: https://chromium-review.googlesource.com/568784
Reviewed-by: Caitlin Potter <caitp@igalia.com>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46607}
By creating the boilerplate only on the second instantiation we cannot
propagate back the elements transitions early enough. The resulting literals
would change the initial ElementsKind one step too late and already pollute
ICs that went to monomorphic state.
- Disable lazy AllocationSites for literals containing arrays
- Introduce new ComplexLiteral class to share code between ObjectLiteral
and ArrayLiteral
- RegexpLiteral now no longer needs a depth_ field
Bug: v8:6517, v8:6519, v8:6211
Change-Id: Ia88d1878954e8895c3d00a7dda8d71e95bba005c
Reviewed-on: https://chromium-review.googlesource.com/563305
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46603}
JSFunction::SetName can fail if it tries to create a string with
length > String::kMaxLength (either by prepending "set "/"get " or
by surrounding a Symbol descriptor with "["/"]").
This patch propagates that exception to the surrounding code rather
than CHECK-failing.
Bug: chromium:740398
Change-Id: I394943af481f3147387dd82ec5862d7071d57827
Reviewed-on: https://chromium-review.googlesource.com/566092
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46601}
This makes sure the inline allocation of generator objects only shrinks
initial maps when slack tracking is actually in progress. Shrinking all
unused properties unconditionally is bogus because instances using them
might have become unreachable and collected by the GC.
R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-crbug-741078
BUG=chromium:741078
Change-Id: Iaf2f08a4fa82c820a945bf012d24c760a6b4f514
Reviewed-on: https://chromium-review.googlesource.com/567982
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46585}
This introduces 2^16 as an upper limit for the allowed value range of a
table switch on all architectures. It also fixes several overflows in
the table size calculation.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-736633
BUG=chromium:736633
Change-Id: I931bd226c99eb8a1ae1770c159fc314ff650bf57
Reviewed-on: https://chromium-review.googlesource.com/566829
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46575}
Previously (since f0e95769), this toLowerCase fast-path assumed
it would only see one-byte flat contents. Unfortunately, it's
possible to have a one-byte sliced string that has a two-byte parent.
This CL ensures that String.p.toLowerCase handles such cases
correctly.
BUG=chromium:736451
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: Iae056b3db5535bb5665439a5cc8282a51571a548
Reviewed-on: https://chromium-review.googlesource.com/565559
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46574}
This fixes the lowering of Reflect.getPrototypeOf and friends to not
perform a [[ToObject]] coercion, but bailout instead. We ensure to
exclude primitive values from the lowering. This makes the lowering
uniform between "Reflect.getPrototypeOf" and "Object.getPrototypeOf".
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-740116
BUG=chromium:740116
Change-Id: If986ee2a3ae4e8f1fd227bdeb4668f523b0dea84
Reviewed-on: https://chromium-review.googlesource.com/565295
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46556}
This improves the general Array constructor call performance (w/o
usable AllocationSite feedback) in TurboFan by ~2x, i.e. for example
invoking the Array constructor like this
var a = Array.call(undefined, n);
instead of
var a = Array(n);
such that the CallIC doesn't know that it's eventually calling the
Array constructor.
It also thus changes the single argument Array constructor to always
return holey arrays. Previously the single argument case for the Array
constructor was somehow trying to dynamically detect 0 and in that case
returned a packed array instead of a holey one. That adds quite a lot
of churn, and doesn't seem to be very useful, especially since this
might lead to unnecessary feedback pollution later.
R=mvstanton@chromium.org
Bug: v8:2229, v8:5269, v8:6399
Change-Id: I3d7cb9bd975ec0e491e3cdbcf1230185cfd1e3de
Reviewed-on: https://chromium-review.googlesource.com/565721
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46538}
The `FAST_` prefix doesn’t make much sense — they’re all just different cases
with their own optimizations. Packedness being implicit (e.g. `FAST_ELEMENTS`
vs. `FAST_HOLEY_ELEMENTS`) is not ideal, either.
This patch renames the FAST elements kinds as follows:
- e.g. FAST_ELEMENTS => PACKED_ELEMENTS
- e.g. FAST_HOLEY_ELEMENTS => HOLEY_ELEMENTS
The following exceptions are left intact, for lack of a better name:
- FAST_SLOPPY_ARGUMENTS_ELEMENTS
- SLOW_SLOPPY_ARGUMENTS_ELEMENTS
- FAST_STRING_WRAPPER_ELEMENTS
- SLOW_STRING_WRAPPER_ELEMENTS
This makes it easier to reason about elements kinds, and less confusing to
explain how they’re used.
R=jkummerow@chromium.org, cbruni@chromium.org
BUG=v8:6548
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ie7c6bee85583c3d84b730f7aebbd70c1efa38af9
Reviewed-on: https://chromium-review.googlesource.com/556032
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46361}
This reverts commit 1520a8518a.
Reason for revert: This CL does not do what it should. All tasks which access the isolate have to be cancelable to guarantee that the isolate still exists when the task is executed. Foreground compilation tasks access the isolate, so they cannot be just normal tasks.
Original change's description:
> [wasm] Run foreground compilation tasks as normal tasks
>
> This CL makes foreground compilation tasks normal (i.e. not cancelable)
> again, because otherwise a deadlock can happen. I think the reason why
> the foreground tasks were cancelable was to make sure that all tasks
> either finish correctly or get canceled. However, since the isolate can
> only shut down on the main thread, this means that the foreground task
> should have already finished when the isolate shuts down, or it should
> not have started at all. I reordered the deletion of the AsyncCompileJob
> though to make sure that an AsyncCompileJob is removed from
> CompilationManager before its promise is resolved.
>
> Here is the deadlock: The JS code which is executed after a promise is
> resolved is executed within the task which resolves the promise. In case
> of async compilation this means that some JS code is executed within a
> CompileTask. In JS, the shutdown of the isolate can be triggered. During
> the shutdown of the isolate, the CancelableTaskManager waits for all
> registered cancelable tasks to complete, including the CompileTask of
> async compilation. This means that the CancelableTaskManager waits for
> itself to finish, which is a deadlock.
>
> R=clemensh@chromium.org, mtrofin@chromium.org
>
> Change-Id: I9f8c7fb2cfc5b9bfc53c761010b1590293bb82c9
> Reviewed-on: https://chromium-review.googlesource.com/554733
> Commit-Queue: Andreas Haas <ahaas@chromium.org>
> Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46343}
TBR=mtrofin@chromium.org,ahaas@chromium.org,clemensh@chromium.org
Change-Id: I60fab90b46d70c703d827816503e7e23b8c50251
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/558284
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46353}
This CL makes foreground compilation tasks normal (i.e. not cancelable)
again, because otherwise a deadlock can happen. I think the reason why
the foreground tasks were cancelable was to make sure that all tasks
either finish correctly or get canceled. However, since the isolate can
only shut down on the main thread, this means that the foreground task
should have already finished when the isolate shuts down, or it should
not have started at all. I reordered the deletion of the AsyncCompileJob
though to make sure that an AsyncCompileJob is removed from
CompilationManager before its promise is resolved.
Here is the deadlock: The JS code which is executed after a promise is
resolved is executed within the task which resolves the promise. In case
of async compilation this means that some JS code is executed within a
CompileTask. In JS, the shutdown of the isolate can be triggered. During
the shutdown of the isolate, the CancelableTaskManager waits for all
registered cancelable tasks to complete, including the CompileTask of
async compilation. This means that the CancelableTaskManager waits for
itself to finish, which is a deadlock.
R=clemensh@chromium.org, mtrofin@chromium.org
Change-Id: I9f8c7fb2cfc5b9bfc53c761010b1590293bb82c9
Reviewed-on: https://chromium-review.googlesource.com/554733
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46343}
This mostly reverts commit c503b80595 but fixes
an issue where literals would always be pretenured on first instantiation.
As a cleanup we pass in a PretenureFlag instead of using the FeedbackVector as
indicator.
Bug: v8:6211
Change-Id: Id328552620e33f5083519bcba1e24396d162d516
Reviewed-on: https://chromium-review.googlesource.com/555670
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46342}
This is a reland of 72b88fdab8
Original change's description:
> [runtime] Make all built-in functions strict.
>
> According to ES#sec-built-in-function-objects all built-in functions
> must be strict.
>
> This is a preliminary CL before changing the way we define built-in
> functions in native JS files.
>
> Bug: v8:6529, v8:6459
> Change-Id: I8e60b342f04ea1b0843fe1990334cbb9b26ebac4
> Reviewed-on: https://chromium-review.googlesource.com/546215
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46237}
Bug: v8:6529, v8:6459
Change-Id: Ic0eb3d7925ed63dd716c4a114601415f92627ca5
Reviewed-on: https://chromium-review.googlesource.com/550156
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46262}
This reverts commit 72b88fdab8.
Reason for revert: Changes a layout test:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/16595
Original change's description:
> [runtime] Make all built-in functions strict.
>
> According to ES#sec-built-in-function-objects all built-in functions
> must be strict.
>
> This is a preliminary CL before changing the way we define built-in
> functions in native JS files.
>
> Bug: v8:6459
> Change-Id: I8e60b342f04ea1b0843fe1990334cbb9b26ebac4
> Reviewed-on: https://chromium-review.googlesource.com/546215
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46237}
TBR=adamk@chromium.org,ishell@chromium.org,verwaest@chromium.org
Change-Id: Ic458b478b2dd23aae7ea2a51aa6052c1f5931c56
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6459
Reviewed-on: https://chromium-review.googlesource.com/549322
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46242}
According to ES#sec-built-in-function-objects all built-in functions
must be strict.
This is a preliminary CL before changing the way we define built-in
functions in native JS files.
Bug: v8:6459
Change-Id: I8e60b342f04ea1b0843fe1990334cbb9b26ebac4
Reviewed-on: https://chromium-review.googlesource.com/546215
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46237}
The implication was actually in the wrong direction: If there is no
memory start address, then the size must be 0.
If the size is 0 though, we might allocate nevertheless to have guard
pages around the accessible memory.
R=ahaas@chromium.org
BUG=chromium:736584
Change-Id: I297dece658d5eaf69c58ecb109ff21d3ca0b8a8d
Reviewed-on: https://chromium-review.googlesource.com/548635
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46221}
This removes the --turbo flag and solely relies on the filter pattern
provided via --turbo-filter when deciding whether to use TurboFan. Note
that disabling optimization wholesale can still be done with --no-opt,
which should be used in favor of --no-turbo everywhere.
Also note that this contains semantic changes to the TurboFan activation
criteria. We respect the filter pattern more stringently and no longer
activate TurboFan just because the source contains patterns forcing use
of Ignition via {AstNumberingVisitor::DisableFullCodegenAndCrankshaft}.
R=rmcilroy@chromium.org
BUG=v8:6408
Change-Id: I0c855f6a62350eb62283a3431c8cc1baa750950e
Reviewed-on: https://chromium-review.googlesource.com/528121
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46167}
This CL leverages and extends the deopt-to-stub mechanisms previously
introduced to support deopting from CSA-built builtins (e.g. Array.prototype.forEach).
BUG=v8:6373
LOG=N
Review-Url: https://codereview.chromium.org/2890363002
Cr-Commit-Position: refs/heads/master@{#46144}
transition, check to see if we have already done this transition.
BUG=v8:6450
Review-Url: https://codereview.chromium.org/2915863004
Cr-Commit-Position: refs/heads/master@{#46129}
In edge cases such as the following, sloppy-mode block-scoped function
hoisting is expected to occur:
eval(`
with({a: 1}) {
function a() {}
}
`)
In this case, there should be the equivalent of a var declaration
outside of the eval, which gets set to the value of the local function
a when the body of the with is executed.
Previously, the way that var declarations are hoisted out of eval
meant that the assignment to that var was an ordinary DYNAMIC_GLOBAL
assignment. However, such a lookup mode meant that the object in the
with scope received the assignment!
This patch fixes that error by marking the assignments produced by
the sloppy mode block scoped function hoisting desugaring so as to
generate a different runtime call which skips with scopes.
Bug: chromium:720247, v8:5135
Change-Id: Ie36322ddc9ca848bf680163e8c016f50d4597748
Reviewed-on: https://chromium-review.googlesource.com/529230
Commit-Queue: Daniel Ehrenberg <littledan@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46116}
If one wasm instance imports an exported function of another instance,
we unwrap the js-to-wasm wrapper of the export and use the underlying
code object directly. However, the code object does not keep the wasm
instance alive. It is only connected via a WeakCell.
With this CL, we explicitly store a FixedArray of all wasm instances
from which we imported functions to keep them alive at least as long as
the instance which imports the code.
R=mtrofin@chromium.org, ahaas@chromium.org
BUG=chromium:734345
Change-Id: I8dcfc9a4ea2d791a62d8cb7255039e481c50bdfd
Reviewed-on: https://chromium-review.googlesource.com/539738
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46062}
This makes sure that the coercion of global import values to numbers
remains non-observable to JavaScript. It allows instantiation failures
to fall back to JavaScript proper without accidentally causing some
side-effect to happen twice. Also coercions might invalidate previous
checks done during linking or throw exceptions.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6431
BUG=v8:6431
Change-Id: Ibe2f7a336bc0fb25532d526746ecc802e04bbd5c
Reviewed-on: https://chromium-review.googlesource.com/512544
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46051}
The constructor of WireBytesRef checks that offset+length is still in
the uint32_t range. This CL avoids triggering this check on illegally
size strings.
R=ahaas@chromium.org
BUG=chromium:734246
Change-Id: Iab5c7013aa3e0ac5060bc4733e712a1652679b1a
Reviewed-on: https://chromium-review.googlesource.com/539402
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46050}
If we pass in thin-string into a keyed load, the underlying internalized string is used to find the handler. However, the thin string itself was used to interpret the handler. Since the thin string itself isn't unique, this caused existing properties on the prototype chain to not be found in case of dictionary-mode prototypes.
Bug: chromium:731193
Change-Id: Ic98d3789ecf9175e17d9c898ab13231aad59efcc
Reviewed-on: https://chromium-review.googlesource.com/539596
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46005}
Large allocations would fail due to the flag not being set.
Bug: chromium:732836
Change-Id: I31686e382386a2d08582c86b29dc8f89841040d1
Reviewed-on: https://chromium-review.googlesource.com/535563
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45999}
Storing the boilerplate on the first run leads to memory ovehead for code
that is run only once. Hence we directly return the creating literal on the
first run and only start creating copies from the second run on.
Bug: v8:6211
Change-Id: I69b96d124a5b594b991fdbcc76dbf935d973ffad
Reviewed-on: https://chromium-review.googlesource.com/530688
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45975}
For unknown Argument object Maps we have to expect that constants fields
are kept on the Map.
Bug: chromium:729597
Change-Id: I110f77455ce434a431c8de27d021b1a5deb86f30
Reviewed-on: https://chromium-review.googlesource.com/532900
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45935}
TracingCpuProfiler test updates the current plaform while
concurrent marking is running.
This patch also disables stress-incremental-marking for
mjsunit/regress-430201.
BUG=chromium:694255
Change-Id: I85ff538c47bce0300cde3204989ef3f9512b805f
Reviewed-on: https://chromium-review.googlesource.com/533873
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45921}
The function that generated a pre-shifted immediate didn't account for the
instruction with post-shift being unencodable. Fix this by passing
information about the target instruction, and use it to limit the application
of pre-shift.
BUG=chromium:725858
Change-Id: Ia0f70b2ea057975d90162aa6889f15b553acd321
Review-Url: https://codereview.chromium.org/2922173004
Cr-Commit-Position: refs/heads/master@{#45911}
This adds missing support for in-object properties within objects having
the {JSGeneratorObject} type to materialization during deoptimization.
For corner-cases where the implicit generator object is statically known
not to escape, object layout might still be arbitrarily complex.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-732169
BUG=chromium:732169,v8:6481
Change-Id: I32f373913d60af64981dc4ed66873cc8a1dbe872
Reviewed-on: https://chromium-review.googlesource.com/530230
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45870}
This adds support for materializing objects of {JSGeneratorObject} type
during deoptimization. Cases where soft-deopts remove any escaping use
of the implicit generator object can cause it to be escape analyzed.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-732169
BUG=chromium:732169
Change-Id: I2ec10b2a509a4f37a456a8ca2fd74b8de2fb55be
Reviewed-on: https://chromium-review.googlesource.com/530847
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45849}
Don't treat new prototypes differently depending on how they become a
prototype. This is work towards always keeping prototypes in slow-mode.
Bug: v8:6471
Change-Id: I62de1018e21d91fda3a5da044615f32c718910b1
Reviewed-on: https://chromium-review.googlesource.com/526596
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45781}
When the slow path for Array.prototype.indexOf calls a Proxy's "has"
trap, it must check afterwards whether an exception was thrown.
BUG=chromium:728813
Change-Id: I998bba6ddcd65adfed2eefb63b3285da60d2a43c
Reviewed-on: https://chromium-review.googlesource.com/527173
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45759}
This cl: https://chromium-review.googlesource.com/509613 changed
CheckNotTaggedHole to not produce any value output. This would mean that
in some cases, we could leak hole on value edges. This violates the
assumption that we cannot see a hole on several operators. Fixing this
back to the original state.
Bug: chromium:730254
Change-Id: I3512930e88dbe15e9d9b4b0d276868f354cc2ae2
Reviewed-on: https://chromium-review.googlesource.com/527033
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45757}
It's possible to build circular objects through the reviver function in
JSON.parse. Recursion needs to check for stack overflows and throw as
needed.
BUG=chromium:729671
Change-Id: I52ccd9ed9fea5829810879f8dd8207043fa6d910
Reviewed-on: https://chromium-review.googlesource.com/525812
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45752}
The inlining of Function.prototype.bind can lead to escape analyzed
bound functions, which weren't handled by the Deoptimizer previously.
BUG=chromium:729573
R=jarin@chromium.org,cbruni@chromium.org
Review-Url: https://codereview.chromium.org/2931483003
Cr-Commit-Position: refs/heads/master@{#45751}
The regression is already fixed. This just adds a regression test to
ensure it will never be reintroduced.
R=ahaas@chromium.org
BUG=chromium:729991
Change-Id: I5cf960cc756cbb7723041bc06a78d6a14c66e241
Reviewed-on: https://chromium-review.googlesource.com/525538
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45739}
When optimizing stores to data properties in literals, we need to first
migrate deprecated maps before we lookup the property access infos for
those.
BUG=chromium:724608
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2930433003
Cr-Commit-Position: refs/heads/master@{#45727}
TBR=ishell@chromium.org
Bug: v8:6457
Change-Id: I09d7d6ff8460688b7ddf25f733aea73a620db953
Reviewed-on: https://chromium-review.googlesource.com/523037
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45699}
Execution tests regress-336820 and regress-678917 finished with error
messages "allocation failure GC in old space requested" and "fatal
javascript OOM in CALL_AND_RETRY_LAST". For successful execution,
parameter max_old_space_size must be increased and this is done inside
tests.
TEST=mjsunit/regress/regress-336820,
mjsunit/regress/regress-678917
BUG=
Review-Url: https://codereview.chromium.org/2907363003
Cr-Original-Commit-Position: refs/heads/master@{#45672}
Committed: 1550c86909
Review-Url: https://codereview.chromium.org/2907363003
Cr-Commit-Position: refs/heads/master@{#45681}
Execution tests regress-336820 and regress-678917 finished with error
messages "allocation failure GC in old space requested" and "fatal
javascript OOM in CALL_AND_RETRY_LAST". For successful execution,
parameter max_old_space_size must be increased and this is done inside
tests.
TEST=mjsunit/regress/regress-336820,
mjsunit/regress/regress-678917
BUG=
Review-Url: https://codereview.chromium.org/2907363003
Cr-Commit-Position: refs/heads/master@{#45672}
Currently x instanceof Map/Set checks cannot take the fast path, since
the Map/Set constructor has dictionary properties. To avoid that, just
forcibly migrate the Map/Set constructor to fast properties again once
it's fully setup in the bootstrapper.
Bug: v8:5717, v8:5902
Change-Id: I23dfd00456c9206a0ca5af71dfbc9236982936fc
Reviewed-on: https://chromium-review.googlesource.com/520578
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45663}
Causes crashes on canary if there is a GC and the value makes it onto
the stack.
Bug: chromium:727662
Change-Id: I44fa8cf8a83b43d64418896c0a1f5518401b454f
Reviewed-on: https://chromium-review.googlesource.com/519302
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45623}
It's extremely difficult to get right: there have been several bugs
related to this feature, especially when combined with
non-simple parameter lists in arrow functions.
BUG=chromium:727218
Change-Id: I97dfbc57a7650199964c5fe99de69143c8e537c2
Reviewed-on: https://chromium-review.googlesource.com/518145
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45603}
This may happen in KeyedStoreIC when the last store via setter deprecates the receiver map.
Bug: chromium:723366
Change-Id: Iff19e50c3761584401340d276ab4eead111883c3
Reviewed-on: https://chromium-review.googlesource.com/517952
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45592}
This time for the current memory size. This call also used to use the
context object stored in the instance, hence it required the instance
to be set. This is no longer the case, so the DCHECKs can just be
removed.
R=ahaas@chromium.org
BUG=chromium:727222
Change-Id: I72a7e3e80c3beb15ecad00c5be068e803456797e
Reviewed-on: https://chromium-review.googlesource.com/517947
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45587}
This widens the range of value output counts to 32 bit on the {Operator}
class. Note that the limit imposed by the parser is 65535 parameters for
each function, but the {Start} node has additional value outputs.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-724153
BUG=chromium:724153
Change-Id: I21b5d947cc2305b255ddbbff6ec1dfa5c02784c7
Reviewed-on: https://chromium-review.googlesource.com/517489
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45573}
For lazy compilation, we encode information about table exports in the
deoptimization data. This information is rebuilt on each instantiation,
so we need to reset it when reusing code objects from another instance.
R=ahaas@chromium.org
BUG=chromium:727219
Change-Id: I90557ef06e692d0a8323223cac26679efcfa408b
Reviewed-on: https://chromium-review.googlesource.com/517945
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45559}
... to make AsyncFunction subclassing work.
Bug: chromium:725537
Change-Id: I7edf4891e14e01567046e7536b3aa93877111448
Reviewed-on: https://chromium-review.googlesource.com/517087
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45544}
Add a protector cell for string bounds checks that is being used to
protect speculative bounds for String.prototype.charCodeAt and
String.prototype.charAt in TurboFan (and Crankshaft). This way we don't
have the diamond in optimized code, which stands in the way of other
optimizations for charCodeAt that are currently being worked on by
petermarshall@.
BUG=v8:6391
TBR=mlippautz@chromium.orgR=petermarshall@chromium.org
Review-Url: https://codereview.chromium.org/2905623003
Cr-Commit-Position: refs/heads/master@{#45514}
This makes sure that property lookups on the provided imports object are
non-observable to JavaScript. It allows instantiation failures to fall
back to JavaScript proper without accidentally calling accessors twice.
Also accessors might invalidate previous checks done during linking or
throw exceptions.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-crbug-719384
BUG=chromium:719384
Change-Id: I3db2672d2a496110f705d02b82878e70cd5d701f
Reviewed-on: https://chromium-review.googlesource.com/509552
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45481}
Validation normally happens while generating the turbofan graph of a
wasm function. For lazy compilation (behind the flag
--wasm-lazy-compilation), we skip this graph generation step during
module generation. Thus we need to validate explicitely.
R=ahaas@chromium.org
BUG=chromium:724851
Change-Id: Ic70887c0d823460a272d0bb636dc98b2b7a7e55e
Reviewed-on: https://chromium-review.googlesource.com/509574
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45478}
If the maximum number of memory pages is raised using
--wasm-max-mem-pages, we might allocate more than kMaxInt bytes for
wasm memory. The byte length is stored as int in JSArrayBuffer, hence
this can lead to failures.
Thus, we now additially check against kMaxInt, and fail instantiation
if this check fails.
Drive-by: Add/fix more bounds checks.
R=ahaas@chromium.org
BUG=chromium:724846
Change-Id: Id8e1a1e13e15f4aa355ab9414b4b950510e5e88a
Reviewed-on: https://chromium-review.googlesource.com/509255
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45465}
This makes sure that function imports without a single call site within
the asm.js module are still preserved in the WebAssembly module, hence
preserving intended JavaScript semantics during module instantiation.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-crbug-722348
BUG=chromium:722348
Change-Id: I624d0e52b32b864c1e3002187a99a0a63834a4b0
Reviewed-on: https://chromium-review.googlesource.com/509450
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45452}
This fixes crashes during validation when trying to construct modules
with excessively large function tables. The {WasmModuleBuilder} now
gracefully checks against existing WebAssembly implementation limits.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-crbug-715455
BUG=chromium:715455
Change-Id: Ia9738cb0b49a1eb4caf073b75301c0303f295699
Reviewed-on: https://chromium-review.googlesource.com/509530
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45429}
Generators were previously treated as "top level" for preparsing purposes,
since all their variables are context-allocated. But doing so isn't quite
correct: the allocation of the "arguments" variable for a generator
depends on whether it's referenced, and so an inner arrow function
which references "arguments" won't properly trigger allocation of
"arguments" since the reference will not be noticed in the preparser.
The same problem exists for "this" since commit 68f0a47b28a96a4966e7b747bfa304b555e726d1;
before that commit, all generators implicitly referenced their "this" argument
as part of the desugaring. With that implicit reference gone, "this"
falls into the same problem as arguments.
This patch restricts the special "top level" treatment to modules,
which have only a trivial "this" binding (it's always undefined), and no
arguments binding. Moreover, all code inside modules is strict, meaning
that unresolved references to "this" will also result in undefined.
R=marja@chromium.org
Bug: chromium:723132
Change-Id: I814d145fb8f3f1a65abb48e4e35595428d063051
Reviewed-on: https://chromium-review.googlesource.com/508055
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45399}
IC system does its best to properly mark stable transition source maps
as unstable (see https://chromium-review.googlesource.com/483442)
however an already recorded map can be deprecated later and the
optimizing compiler may try to generate an elements kind transition
from the updated version of deprecated map which can "become" stable
again.
Bug: chromium:723455
Change-Id: Ic0c392f153587c3cd7c7623a3a6ea85ec72ad5bd
Reviewed-on: https://chromium-review.googlesource.com/507887
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45384}
Original CL description:
[compiler] Delay allocation of heap numbers for deoptimization literals.
... until after the main bulk of code generation, which will soon run on a
different thread.
Bug: v8:6048, chromium:722978
Change-Id: I690c0b009211a2bac60cf06f577720a914c21000
Reviewed-on: https://chromium-review.googlesource.com/507207
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45371}
The underlying issue is that TF Nodes cannot handle input counts
outside the integer range. On an illegal br_table instruction, we
generated a switch node with a control output count >kMaxInt.
Operator::ControlOutputCount turned this into a negative integer later,
leading to a failing DCHECK.
Since such large numbers cannot occur in any valid wasm function anyway,
we just add an additional check to the br table count. There is already
a TODO in the code to change Operator::ControlOutputCount to size_t.
R=ahaas@chromium.org
BUG=chromium:722445
Change-Id: I1975072226e073dee6c8da3b9fa9a050a4695917
Reviewed-on: https://chromium-review.googlesource.com/505496
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45365}
The interpreter does not implement all asm.js specific opcodes. Thus
the combination of --validate-asm and --wasm-interpret-all might crash.
The interpreter does not need to execute asm.js modules, as they are
debugged by executing them in turbofan instead of the wasm interpreter.
This CL thus excludes asm.js modules from --wasm-interpret-all.
R=ahaas@chromium.org
BUG=chromium:719175
Change-Id: I14228ea11ee3ea8a229cfa6e4179338a442b6cca
Reviewed-on: https://chromium-review.googlesource.com/506160
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45364}
Now that the optimized code hangs off the feedback vector, it is possible
to check whether a function has optimized code available every time it's
called in the interpreter entry trampoline. If optimized code exists, the
interpreter entry trampoline 'self-heals' the closure to point to the
optimized code and links the closure into the optimized code list.
BUG=v8:6246
Change-Id: I53b095db2a75ae4824c8195faf8649d766c86118
Reviewed-on: https://chromium-review.googlesource.com/501967
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45328}
This makes sure that the evaluation result of the first expression in
for-statements is properly dropped, to leave the stack in a balanced
state after the statement. It also makes sure validation failures in
said expression are handled correctly.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-crbug-721835
BUG=chromium:721835
Change-Id: I7e6cff4cea0bbf5aad6a3459e27a08ea814dbdbe
Reviewed-on: https://chromium-review.googlesource.com/506148
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45299}
With this CL SloppyArguments immediately go to dictionary elements on
deletion, keeping the arguments backing store packed.
Bug: v8:6251
Change-Id: I90d1972179447bf6810e7fe2b8e0bc8703b38d9d
Reviewed-on: https://chromium-review.googlesource.com/486921
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45286}
Clearing the pending exception is not enough - if we want to swallow an
exception while currently on top of an external handler (e.g. TryCatch),
we also need to clear external_caught_exception.
BUG=chromium:719380
Review-Url: https://codereview.chromium.org/2870423002
Cr-Commit-Position: refs/heads/master@{#45247}
Since the feedback vector is itself a native context structure, why
not store optimized code for a function in there rather than in
a map from native context to code? This allows us to get rid of
the optimized code map in the SharedFunctionInfo, saving a pointer,
and making lookup of any optimized code quicker.
Original patch by Michael Stanton <mvstanton@chromium.org>
BUG=v8:6246,chromium:718891
TBR=yangguo@chromium.org,ulan@chromium.org
Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6
Reviewed-on: https://chromium-review.googlesource.com/500134
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45234}
Due to speculative optimizations, the compiler can run into situations
where it's asked perform impossible operations, like loading a tagged
element as a float64 instead. All of this is guaranteed to be in dead
code (unless there's a bug), but leads to confusion and violates
assumptions in the compiler (that make perfect sense for code that is
not dead). So teach LoadElimination not to mix up element accesses with
incompatible representations.
BUG=chromium:719479
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2866233002
Cr-Commit-Position: refs/heads/master@{#45185}
This reverts commit 662aa425ba.
Reason for revert: Crashing on Canary
BUG=chromium:718891
Original change's description:
> Reland: [TypeFeedbackVector] Store optimized code in the vector
>
> Since the feedback vector is itself a native context structure, why
> not store optimized code for a function in there rather than in
> a map from native context to code? This allows us to get rid of
> the optimized code map in the SharedFunctionInfo, saving a pointer,
> and making lookup of any optimized code quicker.
>
> Original patch by Michael Stanton <mvstanton@chromium.org>
>
> BUG=v8:6246
> TBR=yangguo@chromium.org,ulan@chromium.org
>
> Change-Id: Ic83e4011148164ef080c63215a0c77f1dfb7f327
> Reviewed-on: https://chromium-review.googlesource.com/494487
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#45084}
TBR=ulan@chromium.org,rmcilroy@chromium.org,yangguo@chromium.org,jarin@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
BUG=v8:6246
Change-Id: Idab648d6fe260862c2a0e35366df19dcecf13a82
Reviewed-on: https://chromium-review.googlesource.com/498633
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45174}
After the recent fast-property deletion changes, there can be a
non-empty out-of-object backing store (that previously held properties)
even though the next double property will be stored in-object.
BUG=chromium:718779
Review-Url: https://codereview.chromium.org/2861093004
Cr-Commit-Position: refs/heads/master@{#45146}
Different Intl features (DateTimeFormat, NumberFormat, etc) have
different lists of locales supported. Previously, the default locale
was set to "und", as opposed to what was detected from the surrounding
system, if any of these features was missing data. With this patch,
only that feature is set to "und". In this way, the data quality should
be just as good as if there were no fallback logic, but at the same time,
resolvedOptions().locale should show the locale actually in effect.
R=adamk,jshin
BUG=v8:6288
Change-Id: I62b083a1dde2465cb1541cb18ecc7e59f9097bc0
Reviewed-on: https://chromium-review.googlesource.com/492886
Commit-Queue: Daniel Ehrenberg <littledan@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45109}
If an ArrayBuffer is setup through the WebAssembly.Memory constructor, identify these with a flag and avoid optimizations in js-typed-lowering.cc. This is needed becasue buffers associated with memory objects can be grown/detached leading to crashes.
BUG=chromium:717194
Review-Url: https://codereview.chromium.org/2862763002
Cr-Commit-Position: refs/heads/master@{#45105}
Storing a data property on |target| can change |source|'s map
if |target| and |source| are the same object.
BUG=chromium:716520
Review-Url: https://codereview.chromium.org/2855133006
Cr-Commit-Position: refs/heads/master@{#45097}
Since the feedback vector is itself a native context structure, why
not store optimized code for a function in there rather than in
a map from native context to code? This allows us to get rid of
the optimized code map in the SharedFunctionInfo, saving a pointer,
and making lookup of any optimized code quicker.
Original patch by Michael Stanton <mvstanton@chromium.org>
BUG=v8:6246
TBR=yangguo@chromium.org,ulan@chromium.org
Change-Id: Ic83e4011148164ef080c63215a0c77f1dfb7f327
Reviewed-on: https://chromium-review.googlesource.com/494487
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45084}
When deleting the most recently added fast property from an object
by undoing its last map transition, we must clear any recorded slots.
This can only be done in C++, so this functionality must move out
of the stub.
Also update a CHECK in the JSObject verifier to allow backing stores
sticking around after such property deletions.
BUG=chromium:716912,chromium:714981
Review-Url: https://codereview.chromium.org/2854373002
Cr-Commit-Position: refs/heads/master@{#45069}
More care must be taken to remain on the fast path in the face of
@@species constructors.
BUG=chromium:716044
Review-Url: https://codereview.chromium.org/2846963003
Cr-Commit-Position: refs/heads/master@{#45065}
The --wasm-interpret-all flag is mainly used for debugging. Combining it
with lazy compilation is unreasonable and would create a lot of special
cases in both code paths. Hence this CL disallows the combination of
these two flags by adding a negative flag implication.
R=rossberg@chromium.org
BUG=chromium:715216
Change-Id: I777e21d7e64f567e2728498dbb6f5b0709cd28f1
Reviewed-on: https://chromium-review.googlesource.com/494486
Reviewed-by: Andreas Rossberg <rossberg@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45047}
ErrorThrower::Reify() should only be called if an error is actually set.
This CL introduces a Reset() method to replace the obsolete (now
disallowed) usages.
R=mtrofin@chromium.org
BUG=chromium:717056
Change-Id: I41b989a9c7b33591ee26ec6d43540a38289ab54f
Reviewed-on: https://chromium-review.googlesource.com/493506
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45039}
This reverts commit c5ad9c6d8e.
Reason for revert: Fails on gc stress:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/12661
Original change's description:
> [TypeFeedbackVector] Store optimized code in the vector
>
> Since the feedback vector is itself a native context structure, why
> not store optimized code for a function in there rather than in
> a map from native context to code? This allows us to get rid of
> the optimized code map in the SharedFunctionInfo, saving a pointer,
> and making lookup of any optimized code quicker.
>
> Original patch by Michael Stanton <mvstanton@chromium.org>
>
> BUG=v8:6246
>
> Change-Id: I60ff8c408c3001bc272b4b198c9cbaea2872a9e5
> Reviewed-on: https://chromium-review.googlesource.com/476891
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#45022}
TBR=ulan@chromium.org,rmcilroy@chromium.org,yangguo@chromium.org,mvstanton@chromium.org,jarin@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6246
Change-Id: I9cd5735b03898cae6ae7adea0f19d32fceb31619
Reviewed-on: https://chromium-review.googlesource.com/493287
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45027}
Since the feedback vector is itself a native context structure, why
not store optimized code for a function in there rather than in
a map from native context to code? This allows us to get rid of
the optimized code map in the SharedFunctionInfo, saving a pointer,
and making lookup of any optimized code quicker.
Original patch by Michael Stanton <mvstanton@chromium.org>
BUG=v8:6246
Change-Id: I60ff8c408c3001bc272b4b198c9cbaea2872a9e5
Reviewed-on: https://chromium-review.googlesource.com/476891
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45022}
As required by #sec-built-in-function-objects.
They were strict functions before (see
e2f1c26982), but that got lost when they
were ported to ASM builtins.
This makes optimized and non-optimized code agree on the same behavior
in regress-105.js.
BUG=v8:105,v8:5778,v8:6325
Review-Url: https://codereview.chromium.org/2848313004
Cr-Commit-Position: refs/heads/master@{#45012}
This CL changes certain frequently-called Array builtins to use CodeStubArguments
rather than peek at the stack frames above array builtins to determine if options
arguments have been passed into them.
Previous failure likely due to unfortunate/unluckily timed GC that moved due to
changed timing/allocation from this CL. Test mitigation for allocation-site-info.js
included.
BUG=v8:1956
LOG=N
Review-Url: https://codereview.chromium.org/2829093004
Cr-Commit-Position: refs/heads/master@{#44998}
Reason for revert:
Still fails. Likely has to do with gc heap size for allocation site tests, mitigation pending...
Original issue's description:
> [turbofan] Reland: Avoid going through ArgumentsAdaptorTrampoline for select CSA array builtins
>
> This CL changes certain frequently-called Array builtins to use CodeStubArguments
> rather than peek at the stack frames above array builtins to determine if options
> arguments have been passed into them.
>
> Previous failure cannot be reproed with failing config. Flake?
>
> BUG=v8:1956
> LOG=N
>
> Review-Url: https://codereview.chromium.org/2829093004
> Cr-Commit-Position: refs/heads/master@{#44996}
> Committed: 7ca381e847TBR=mvstanton@chromium.org,ishell@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:1956
Review-Url: https://codereview.chromium.org/2851063002
Cr-Commit-Position: refs/heads/master@{#44997}
This CL changes certain frequently-called Array builtins to use CodeStubArguments
rather than peek at the stack frames above array builtins to determine if options
arguments have been passed into them.
Previous failure cannot be reproed with failing config. Flake?
BUG=v8:1956
LOG=N
Review-Url: https://codereview.chromium.org/2829093004
Cr-Commit-Position: refs/heads/master@{#44996}
Reason for revert:
Nosnap failure
Original issue's description:
> [turbofan] Avoid going through ArgumentsAdaptorTrampoline for select CSA/C++ builtins
>
> This CL changes certain frequently-called Array builtins to use CodeStubArguments
> rather than peek at the stack frames above array builtins to determine if options
> arguments have been passed into them.
>
> BUG=v8:1956
> LOG=N
>
> Review-Url: https://codereview.chromium.org/2829093004
> Cr-Commit-Position: refs/heads/master@{#44994}
> Committed: 680356278dTBR=mvstanton@chromium.org,ishell@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:1956
Review-Url: https://codereview.chromium.org/2851703005
Cr-Commit-Position: refs/heads/master@{#44995}
This CL changes certain frequently-called Array builtins to use CodeStubArguments
rather than peek at the stack frames above array builtins to determine if options
arguments have been passed into them.
BUG=v8:1956
LOG=N
Review-Url: https://codereview.chromium.org/2829093004
Cr-Commit-Position: refs/heads/master@{#44994}
1. Replaces --crankshaft with --opt in tests.
2. Also fixes presubmit to check for --opt flag when
assertOptimized is used.
3. Updates testrunner/local/variants.py and
v8_foozie.py to use --opt flag.
This would mean, nooptimize variant means there are
no optimizations. Not even with %OptimizeFunctionOnNextCall.
Bug:v8:6325
Change-Id: I638e743d0773a6729c6b9749e2ca1e2537f12ce6
Reviewed-on: https://chromium-review.googlesource.com/490206
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44985}
Clearing out the constructor field is invalid in the case where the
function's map has transitioned since the last SetPrototype call.
Bug: chromium:714972
Change-Id: Ie918702a128219c4995b805f7c9a53b41cc4e4b6
Reviewed-on: https://chromium-review.googlesource.com/486130
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44906}
This fixes the bounds checking of "unsigned" numeric literals (those
that do not contains dots) by the parser. In particular this fixes a
bogus truncation to 32-bit in the scanner. It also makes the scanner
more robust by limiting the range of those numeric literals, hence
completely avoiding rounding loss or truncation errors.
R=clemensh@chromium.org
TEST=unittests/AsmJsScannerTest.UnsignedNumbers
BUG=v8:6298
Change-Id: Id31ab3c652e99fa8d3d6663315768e1bfaf3b773
Reviewed-on: https://chromium-review.googlesource.com/486881
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44890}
Only create a singleton array for Array(len) if Type(len) cannot be
Number, otherwise we might need to throw an exception instead.
BUG=chromium:715404
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2838123004
Cr-Commit-Position: refs/heads/master@{#44886}
With this CL SloppyArguments immediately go to dictionary elements on
deletion, keeping the arguments backing store packed.
Bug: v8:6251
Change-Id: I2afa4fb5f0af9942eee0a1606942f5f289539330
Reviewed-on: https://chromium-review.googlesource.com/480379
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44857}
This fixes propagation of validation failures that happen during the
validation of a heap access expression in {ValidateHeapAccess}.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-crbug-714971
BUG=chromium:714971
Change-Id: I8f91ac1da34ae50fdde2938f61b6468cdac92b6e
Reviewed-on: https://chromium-review.googlesource.com/486801
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44851}
In general, deleting a property from a fast-properties object
requires transitioning the object to dictionary mode. However,
when the most-recently-added property is deleted, we can simply
roll back the last map transition that the object went through.
This is a performance experiment: it should make things faster,
but if it turns out to have more negative than positive impact,
we will have to revert it.
TBR=bmeurer@chromium.org (just adding a comment)
Previously reviewed at https://codereview.chromium.org/2830093002
Previously landed as 98acfb36e1 / r44799
Review-Url: https://codereview.chromium.org/2840583002
Cr-Commit-Position: refs/heads/master@{#44808}
This makes sure that typed array constructors (e.g. Int8Array, ...) used
within an asm.js module are considered uses of stdlib values, and hence
are checked during module instantiation.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6280
BUG=v8:6280,chromium:714537
Change-Id: Ic5d689f5319c4dac4e9df3dca4a8cf5a4edd890b
Reviewed-on: https://chromium-review.googlesource.com/485521
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44800}
In general, deleting a property from a fast-properties object
requires transitioning the object to dictionary mode. However,
when the most-recently-added property is deleted, we can simply
roll back the last map transition that the object went through.
This is a performance experiment: it should make things faster,
but if it turns out to have more negative than positive impact,
we will have to revert it.
TBR=bmeurer@chromium.org (just adding a comment)
Review-Url: https://codereview.chromium.org/2830093002
Cr-Commit-Position: refs/heads/master@{#44799}
Ensure source map is not stable if elements kind transitions are expected.
BUG=chromium:700733
Change-Id: Ie937e7064127250b1100109986c3e9b411fae1d6
Reviewed-on: https://chromium-review.googlesource.com/483442
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44780}
The included test case illustrates the problem. It subtracts (16 << 27)
from another number. The Machine Operator Reducer would replace the
shift computation with 0x0000000080000000, and then change the subtract
to an add of -(0x0000000080000000), which is 0xffffffff80000000.
The instruction selector would determine that this value could be an
immediate, because it fits in 32 bits, so it would select the lea
instruction. Finally, the code generator would detect that the
immediate was less than 0, flip the sign and replace the add with a
subtract of 0x80000000. Because the x64 subtract instruction's
immediate field is 32 bits, the processor would interpret this as
0xffffffff80000000 instead of an unsigned value.
This change fixes the issue by making the CanBeImmediate check
explicitly compare against INT_MIN and INT_MAX. We disallow INT_MIN
as an immediate precisely because we cannot tell 0x0000000080000000
from 0xffffffff80000000 when truncated to 32 bits.
Bug: chromium:711203
Change-Id: Ie371b8ea290684a6bb723bae9c693a866f961850
Reviewed-on: https://chromium-review.googlesource.com/482448
Commit-Queue: Eric Holk <eholk@chromium.org>
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44758}
The typing rule for JSCreateArguments must properly declare rest
parameters as arrays and only consider sloppy and strict arguments
objects as Type::OtherObject.
TBR=jarin@chromium.org
BUG=v8:6262,chromium:712802
Review-Url: https://codereview.chromium.org/2828573004
Cr-Commit-Position: refs/heads/master@{#44712}
When --harmony-strict-legacy-accessor-builtins is enabled, it brings
V8's behavior in line with the spec and more recent versions of
SpiderMonkey and JSC:
- No implicit receiver coercion
- Attempting to redefine a non-configurable property throws
Bug: v8:5070
Change-Id: I82b927538604136c0c550e19bcc606fbfea1377e
Reviewed-on: https://chromium-review.googlesource.com/478312
Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44703}
+ additional fixes uncovered by bug, and addressed remaining feedback
from original CL (https://codereview.chromium.org/2806073002/).
Note that the regression test differs slightly from the bug reported one,
in that it catches the RangeError which will eventually be thrown due
to call stack size being exceeded.
BUG=chromium:712569
Review-Url: https://codereview.chromium.org/2825073002
Cr-Commit-Position: refs/heads/master@{#44700}
This fixes the de-duplication logic used when writing the deoptimizer
translation of a frame-state containing {kArgumentsElementsState}. The
object counts as a captured object and participates in the numbering of
duplicated objects.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-711166
BUG=chromium:711166
Change-Id: I4a3b892017ab8217197e5f94c1a0975d0cd6979f
Reviewed-on: https://chromium-review.googlesource.com/476631
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44692}
Currently when the module has memory specified in the compiled bytes, but with no initial memory
exported memory assigns a bogus buffer to the instance. When grow_memory is called on this buffer, it tries to patch an incorrect address.
- Fix exported memory to handle no initial memory
- Fix grow_memory to handle uninitialized buffers
BUG=chromium:710844
R=bradnelson@chromium.org
Review-Url: https://codereview.chromium.org/2820223002
Cr-Commit-Position: refs/heads/master@{#44671}
If the current context is overwritten by doing Realm.navigate(0) we
fail to delete the module embedder data from the correct current
context, because we have an handle to the old context which was
already cleaned up by calling DisposeRealm in RealmNavigate.
This patch disallows navigation to the first realm.
Bug: chromium:711165
Change-Id: I6b9d3187367dae9d1fe38c0efa361d461c94c917
Reviewed-on: https://chromium-review.googlesource.com/476970
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44656}
This fixes the existing lowering of {JSGetSuperConstructor} nodes to
unconditional throws. The above operator is marked as {kNoWrite} but
runtime calls are not marked as such. Any deoptimizing operation after
the throw would not be able to find a valid {Checkpoint}. We remove the
lowering case in question.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-6248
BUG=v8:6248
Change-Id: I22c922947336254502f698b02f944cf35dd8688a
Reviewed-on: https://chromium-review.googlesource.com/476570
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44632}
The hole NaN should also have proper Type::Hole, and not silently hide
in the Type::Number. This way we can remove all the special casing for
the hole NaN, and we also finally get the CheckNumber right.
This also allows us to remove some ducktape from the Deoptimizer, as for
escape analyzed FixedDoubleArrays we always pass the hole value now to
represent the actual holes.
Also-By: jarin@chromium.org
BUG=chromium:684208,chromium:709753,v8:5267
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2814013003
Cr-Commit-Position: refs/heads/master@{#44603}
RationalizeConsecutiveAtoms optimizes ab|ac|az to a(?:b|c|d).
Ensure that this optimization does not split surrogate pairs in unicode
mode.
BUG=chromium:641091
Review-Url: https://codereview.chromium.org/2813893002
Cr-Commit-Position: refs/heads/master@{#44599}
As of crrev.com/2760213003, the CheckBounds operator passes a truncation
that identfies zero and minus zero. However that was not reflected in
the typing rule, and as such the type of CheckBounds(-0,length) was
always Type::None. That confused the typed alias analysis in the
LoadElimination and led to ignoring StoreElement nodes.
BUG=chromium:708050
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2812013006
Cr-Commit-Position: refs/heads/master@{#44598}
This fixes {JSCreateLowering} to traverse boilerplate objects in the
same order the runtime uses (i.e. properties first, elements second).
That order is hard-coded in the nesting of {AllocationSite} objects.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-709537
BUG=chromium:709537
Change-Id: I8f446a0880448ea88a3e242e92d11d611581a42b
Reviewed-on: https://chromium-review.googlesource.com/474028
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44563}
We assumed that every JSArray would have a JSObject as a prototype,
but it could be null, in which case we bail out to slow path.
Also rename spread_array variable here, because this fast-path
isn't just used by spreads anymore.
Bug: chromium:707675
Change-Id: I8045d83977735dd00c3ebde2e0704f6b04afdedd
Reviewed-on: https://chromium-review.googlesource.com/472907
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44531}
Loading the map, performing a side-effect, and then using the stored
pointer for the fast-path check is another antipattern that can lead to
unintended shapes on the fast path.
BUG=chromium:709029
Review-Url: https://codereview.chromium.org/2807153002
Cr-Commit-Position: refs/heads/master@{#44528}
Ensuring we move forward all the deferred handles, in all cases.
BUG=
Review-Url: https://codereview.chromium.org/2807013002
Cr-Commit-Position: refs/heads/master@{#44525}
We went on decoding the next section, which happened to be the start
section. But since the function section had an error, the signature
pointer was not still {nullptr} on the start function, leading to a
segfault.
Drive-by fix: Improve decoder trace output.
R=ahaas@chromium.org
BUG=chromium:708714, chromium:708787
Change-Id: I5ae2adb32764b9d154f1ca878019f26ac31839b4
Reviewed-on: https://chromium-review.googlesource.com/472847
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44521}
The DCHECK added by https://chromium-review.googlesource.com/461827 was not true
in case we failed to compile the function.
BUG=chromium:708598
Change-Id: I6a542c3ac6281c0549396b4ff0af34ea44450006
Reviewed-on: https://chromium-review.googlesource.com/472826
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44513}
The format of the name section changed recently. It now contains
subsections of different type (currently for function names or local
variable names).
This CL changes our internal wasm module builders (in JS and C++) to
emit this new format, and changes the decoder to understand it.
We currently only parse the function name section, and ignore names of
local variables. I will later extend this to parse local variable names
when needed for debugging.
R=ahaas@chromium.org, rossberg@chromium.org
BUG=v8:6222
Change-Id: I2627160c25c9209a3f09abe0b88941ec48b24434
Reviewed-on: https://chromium-review.googlesource.com/470247
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Rossberg <rossberg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44492}
This fixes behavior for HeapNumber {index} arguments passed to
AdvanceStringIndex.
Previously, we'd blindly treat {index} as a Smi. Passing a HeapNumber instead
would result in a Smi addition on the tagged HeapNumber pointer.
BUG=chromium:709015
Review-Url: https://codereview.chromium.org/2798933003
Cr-Commit-Position: refs/heads/master@{#44458}
This CL fixes two more cases in which a regexp could unintentionally transition
to slow mode while on the fast path, leading to possible OOB accesses of
lastIndex.
In both cases, the fix is to re-check the shape and possibly bail to runtime.
BUG=chromium:708247,v8:6210
Review-Url: https://codereview.chromium.org/2803603005
Cr-Commit-Position: refs/heads/master@{#44451}
This fixes a corner case which allowed warnings during the asm.js
instantiation to be promoted to actual exceptions. Even instantiation
attempts that fail are not allowed to throw exceptions observable by
JavaScript, but need to fall back to JavaScript execution.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6203
BUG=v8:6203
Change-Id: I86f5a3adda4bcfe63b5cddc42d8ae1c3dbb88147
Reviewed-on: https://chromium-review.googlesource.com/468808
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44414}
Remove destructuring assignments (parsed during arrow function formal
parameters) from queue for rewriting if parsing a lazy top-level arrow function.
Built ontop of https://chromium-review.googlesource.com/c/464769/
BUG=chromium:706234, chromium:706761, v8:6182
R=marja@chromium.org, adamk@chromium.org, vogelheim@chromium.org
Change-Id: Ib35196b907350d1d78e4c3fcbf4cc971bf200948
Reviewed-on: https://chromium-review.googlesource.com/465415
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44393}
This makes temporary variables nestable and fixes borked nesting with
function table calls by introducing a {TemporaryVariableScope} helper.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6196
BUG=v8:6196
Change-Id: Ie760f27ce9ede3d4d5dacdebdc295c56cc666970
Reviewed-on: https://chromium-review.googlesource.com/467327
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44367}
Currently x instanceof RegExp checks cannot take the fast path, since
the RegExp constructor has dictionary properties. To avoid that, just
forcibly migrate the RegExp constructor to fast properties again once
it's fully setup in the bootstrapper. This yields a 10x improvement for
x instanceof RegExp checks.
R=yangguo@chromium.org
BUG=v8:5902
Review-Url: https://codereview.chromium.org/2786143004
Cr-Commit-Position: refs/heads/master@{#44316}
