This patch fixes OOM crash that happens for large heap where
the total size of edges exceeds 2GB, which is the hard limit
for v8::internal::List allocated using tcmalloc.
BUG=chromium:675911
Review-Url: https://codereview.chromium.org/2595003002
Cr-Commit-Position: refs/heads/master@{#42004}
This patch stores the promise, resolve, reject properties of the
deferred object created by CreateInternalPromiseCapability and
NewPromiseCapability directly on the promise (if the promise hasn't
been fulfilled), otherwise they are stored on the
PromiseReactionJobInfo.
This patch removes the currently unused
CreateInternalPromiseCapability and inlines the call to create the
deferred promise object.
NewPromiseCapability is the only function that works with a deferred.
This patch results in a 8.5% improvement in benchmarks over 5 runs.
BUG=v8:5343
Review-Url: https://codereview.chromium.org/2590563003
Cr-Commit-Position: refs/heads/master@{#41991}
Add test as well.
Add regression test for passing uninitialized promises to init hook
BUG=v8:4643
Review-Url: https://codereview.chromium.org/2578173004
Cr-Commit-Position: refs/heads/master@{#41982}
This syntax was formerly legal per ECMAScript, but has been a
SyntaxError for some time now. V8 deviates from spec in that it
is instead a runtime error; we'd like to know if we can get
away with removing it (at least in sloppy mode) or if the spec
should be changed.
c.f. https://github.com/tc39/ecma262/issues/257#issuecomment-195106880
Also add self to authors file
BUG=v8:4480
Review-Url: https://codereview.chromium.org/2599253002
Cr-Commit-Position: refs/heads/master@{#41960}
ECMA 402 v2 made Intl constructors more strict in terms of how they would
initialize objects, refusing to initialize objects which have already
been constructed. However, when Chrome tried to ship these semantics,
we ran into web compatibility issues.
This patch tries to square the circle and implement the simpler v2 object
semantics while including a compatibility workaround to allow objects to
sort of be initialized later, storing the real underlying Intl object
in a symbol-named property.
The new semantics are described in this PR against the ECMA 402 spec:
https://github.com/tc39/ecma402/pull/84
BUG=v8:4360, v8:4870
LOG=Y
Review-Url: https://codereview.chromium.org/2582993002
Cr-Commit-Position: refs/heads/master@{#41943}
Ignoring this linker warning will enable Chromium builds to start
treating all linker warnings as errors in Windows builds.
BUG=676417, 659007
Review-Url: https://codereview.chromium.org/2594013004
Cr-Commit-Position: refs/heads/master@{#41931}
Reason for revert:
Speculative revert because of blocked roll: https://codereview.chromium.org/2596013002/
Original issue's description:
> [TypeFeedbackVector] Root literal arrays in function literals slots
>
> Literal arrays and feedback vectors for a function can be garbage
> collected if we don't have a rooted closure for the function, which
> happens often. It's expensive to come back from this (recreating
> boilerplates and gathering feedback again), and the cost is
> disproportionate if the function was inlined into optimized code.
>
> To guard against losing these arrays when we need them, we'll now
> create literal arrays when creating the feedback vector for the outer
> closure, and root them strongly in that vector.
>
> BUG=v8:5456
>
> Review-Url: https://codereview.chromium.org/2504153002
> Cr-Commit-Position: refs/heads/master@{#41893}
> Committed: 93df094081TBR=bmeurer@chromium.org,mlippautz@chromium.org,mvstanton@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5456
Review-Url: https://codereview.chromium.org/2597163002
Cr-Commit-Position: refs/heads/master@{#41917}
Odd numbered floating-point register shouldn't be used as compare register
on mips32r6 architecture. In case cpu switches to FRE mode, writes to odd
numbered single-precision fp register will update upper part of even
double-precision register, which will corrupt the even register.
BUG=
Review-Url: https://codereview.chromium.org/2591063003
Cr-Commit-Position: refs/heads/master@{#41916}
Reason for revert:
speculative revert: https://codereview.chromium.org/2596013002/
Original issue's description:
> [regexp] Remove IsRegExp intrinsic
>
> The two remaining uses of this intrinsic in debug.js and mirrors.js now
> simply rely on the runtime function.
>
> BUG=v8:5339
>
> Review-Url: https://codereview.chromium.org/2591923003
> Cr-Commit-Position: refs/heads/master@{#41892}
> Committed: c9cb94a06fTBR=bmeurer@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2592383002
Cr-Commit-Position: refs/heads/master@{#41915}
Change bytecode-expectations-printer.cc in the cctest application so
that intrinsic function names are printed rather than their native
context index.
This minimizes the amount of unnecessary changes to the bytecode
expectations that need to happen whenever the context fields are
changed.
BUG=v8:5769
R=neis@chromium.org, rmcilroy@chromium.org, adamk@chromium.org
Review-Url: https://codereview.chromium.org/2593823002
Cr-Commit-Position: refs/heads/master@{#41900}
On ARM Neon at least, denormals flush to zero, which may not match
regular FP behavior.
LOG=N
BUG=v8:4124
Review-Url: https://codereview.chromium.org/2598583002
Cr-Commit-Position: refs/heads/master@{#41895}
Literal arrays and feedback vectors for a function can be garbage
collected if we don't have a rooted closure for the function, which
happens often. It's expensive to come back from this (recreating
boilerplates and gathering feedback again), and the cost is
disproportionate if the function was inlined into optimized code.
To guard against losing these arrays when we need them, we'll now
create literal arrays when creating the feedback vector for the outer
closure, and root them strongly in that vector.
BUG=v8:5456
Review-Url: https://codereview.chromium.org/2504153002
Cr-Commit-Position: refs/heads/master@{#41893}
The two remaining uses of this intrinsic in debug.js and mirrors.js now
simply rely on the runtime function.
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2591923003
Cr-Commit-Position: refs/heads/master@{#41892}
This is more renaming work to comply with the naming in the public
design repository. E.g. types are called "value types" and we no longer
refer to ASTs.
R=clemensh@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2594993002
Cr-Commit-Position: refs/heads/master@{#41891}
The new object will hold information which is shared by all clones of a
WasmCompiledModule, e.g. the decoded asm.js offset table, and in the
future also breakpoints. From there, we can set them on each new
instantiation of any clone.
While already changing lots of the code base, I also renamed all
getters from "get_foo" to "foo", to conform to the style guide.
R=titzer@chromium.org, yangguo@chromium.org
BUG=v8:5732
Review-Url: https://codereview.chromium.org/2591653002
Cr-Commit-Position: refs/heads/master@{#41862}
Currently, to find out a Promise's status and result, one has to use the
debug context. This is for example done in Node.js. This new API is a
better replacement, also in the context of the debug context being
deprecated eventually.
R=franzih@chromium.org, gsathya@chromium.org, jochen@chromium.org
BUG=v8:5764
Review-Url: https://codereview.chromium.org/2589113002
Cr-Commit-Position: refs/heads/master@{#41855}
Previously, the Intl.DateTimeFormat constructor and other related paths had
a bug where the options bag passed in would be modified in place. This patch
makes V8's Intl implementation follow the specification's logic to avoid
such a modification.
BUG=v8:4219
Review-Url: https://codereview.chromium.org/2587703002
Cr-Commit-Position: refs/heads/master@{#41826}
This CL implements GetPossibleBreakpoints for wasm, by iterating over
all functions in the requested range and returning the location of all
instructions within that range.
The connection to the inspector will be added later, when setting
breakpoint also works for wasm: http://crrev.com/2536763002
BUG=chromium:613110
R=titzer@chromium.org
Review-Url: https://codereview.chromium.org/2588763002
Cr-Commit-Position: refs/heads/master@{#41818}
Encode the PropertyAttribute and whether the function
names must be set as a flag instead of setting two registers.
BUG=v8:5624
Review-Url: https://codereview.chromium.org/2586463002
Cr-Commit-Position: refs/heads/master@{#41812}
When executing wasm code for testing, we did not create a
WasmInstanceObject and link it to the generated code. This required
some special handling at runtime (mainly for stack trace generation).
This CL always provides the WasmInstanceObject, such that e.g. function
names can be resolved the usual way.
The module bytes referenced by the WasmCompiledModule linked with the
WasmInstanceObject do not hold a valid wasm module yet. Instead, we
just add the bytes we need, and make the objects in WasmModule point to
those bytes (currently only used for function names). Those bytes will
not be parsed at runtime anyway.
R=titzer@chromium.orgCC=jgruber@chromium.org
BUG=v8:5620
Review-Url: https://codereview.chromium.org/2551053002
Cr-Commit-Position: refs/heads/master@{#41809}
The inspector cannot deal with breaking inside of debug-evaluate.
There is therefore no point in supporting that in the debugger.
The optional additional context parameter for debug-evaluate also
can be removed since it's not being used.
R=jgruber@chromium.org
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2580323002
Cr-Commit-Position: refs/heads/master@{#41791}
This is so that a NotSuperConstructor error is thrown before evaluating the
arguments to the super constructor. Besides updating the runtime function, a
new bytecode GetSuperConstructor is introduced.
BUG=v8:5336
Review-Url: https://codereview.chromium.org/2504553003
Cr-Commit-Position: refs/heads/master@{#41788}
This adds kInit, kResolve, kBefore and kAfter lifecycle hooks to promises.
This also exposes an API to set the PromiseHook.
BUG=v8:4643
Review-Url: https://codereview.chromium.org/2575313002
Cr-Commit-Position: refs/heads/master@{#41775}
Transform LdaNull/LdaUndefined followed by StrictEquality to TestNull/TestUndefined.
This would avoid a call to the compare IC. In the bytecode-graph builder these are
mapped to StrictEqual javascript operator. When reducing this operator, we already
optimize the cases for null/undefined.
BUG=v8:4280
Review-Url: https://codereview.chromium.org/2554723004
Cr-Commit-Position: refs/heads/master@{#41768}
Many websites use simple calls to String.prototype.indexOf with either a
one character ASCII needle or needles bigger than the search string. This
CL adds a TFJ builtin for these simple cases, giving up to factor 5 speedup.
Drive-by-fix: Add default Object type to Arguments.at
BUG=
Review-Url: https://codereview.chromium.org/2539093002
Cr-Commit-Position: refs/heads/master@{#41760}
If a context snapshot includes the global proxy constructor function, we
expect the incoming global proxy to have the correct instance size so
that we can reinitialize it with said constructor. However, when the
bootstrapper allocates a new global proxy, we need to know the expected
size.
We solve this by storing the size on the to-be-serialized isolate.
R=jochen@chromium.org, peria@chromium.org
BUG=chromium:617892
Review-Url: https://codereview.chromium.org/2585693002
Cr-Commit-Position: refs/heads/master@{#41756}
This introduces an explicit struct for the communication channel between
the {ArrayLiteral} AST node and the corresponding runtime methods. Those
methods take a pair of {ElementsKind} as well as an array (can either be
a FixedArray or a FixedDoubleArray) of constant values.
For bonus points it also reduces the size of the involved heap object by
one word (i.e. length field of FixedArray not needed anymore).
R=mvstanton@chromium.org
Review-Url: https://codereview.chromium.org/2581683003
Cr-Commit-Position: refs/heads/master@{#41752}
The WasmRunner now always holds a TestingModule, and allows to add
several functions to it. The prepares a change to always run wasm code
with a full module behind it, removing the special handling for "no wasm
instance" at runtime (http://crrev.com/2551053002).
This CL here also templatizes the WasmRunner such that the Call method must
be called with the same signature specified for the WasmRunner. This
already catched several mismatches there.
R=titzer@chromium.org, ahaas@chromium.org
BUG=v8:5620
Review-Url: https://codereview.chromium.org/2551043002
Cr-Original-Commit-Position: refs/heads/master@{#41728}
Committed: 2ff5906231
Review-Url: https://codereview.chromium.org/2551043002
Cr-Commit-Position: refs/heads/master@{#41747}
Reason for revert:
Win64 dbg failures
Original issue's description:
> [wasm] Make WasmRunner the central test structure
>
> The WasmRunner now always holds a TestingModule, and allows to add
> several functions to it. The prepares a change to always run wasm code
> with a full module behind it, removing the special handling for "no wasm
> instance" at runtime (http://crrev.com/2551053002).
> This CL here also templatizes the WasmRunner such that the Call method must
> be called with the same signature specified for the WasmRunner. This
> already catched several mismatches there.
>
> R=titzer@chromium.org, ahaas@chromium.org
> BUG=v8:5620
>
> Review-Url: https://codereview.chromium.org/2551043002
> Cr-Commit-Position: refs/heads/master@{#41728}
> Committed: 2ff5906231TBR=ahaas@chromium.org,titzer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5620
Review-Url: https://codereview.chromium.org/2583543002
Cr-Commit-Position: refs/heads/master@{#41732}
Instead of unconditionally setting maybe_assigned for parameters, treat
parameters like other variables except that at the end we set maybe_assigned if
the function has a sloppy arguments object.
R=adamk@chromium.org, mstarzinger@chromium.org
BUG=v8:5636
Review-Url: https://codereview.chromium.org/2578103002
Cr-Commit-Position: refs/heads/master@{#41731}
The WasmRunner now always holds a TestingModule, and allows to add
several functions to it. The prepares a change to always run wasm code
with a full module behind it, removing the special handling for "no wasm
instance" at runtime (http://crrev.com/2551053002).
This CL here also templatizes the WasmRunner such that the Call method must
be called with the same signature specified for the WasmRunner. This
already catched several mismatches there.
R=titzer@chromium.org, ahaas@chromium.org
BUG=v8:5620
Review-Url: https://codereview.chromium.org/2551043002
Cr-Commit-Position: refs/heads/master@{#41728}
If an accessor property is non-configurable, one should not be able
to re-declare it as a function. This specifically applies to special properties like window.location.
BUG=chromium:670596
Review-Url: https://codereview.chromium.org/2582493002
Cr-Commit-Position: refs/heads/master@{#41725}
Some instructions in WebAssembly trap for some inputs, which means that the
execution is terminated and (at least at the moment) a JavaScript exception is
thrown. Examples for traps are out-of-bounds memory accesses, or integer
divisions by zero.
Without the TrapIf and TrapUnless operators trap check in WebAssembly introduces 5
TurboFan nodes (branch, if_true, if_false, trap-reason constant, trap-position
constant), in addition to the trap condition itself. Additionally, each
WebAssembly function has four TurboFan nodes (merge, effect_phi, 2 phis) whose
number of inputs is linear to the number of trap checks in the function.
Especially for functions with high numbers of trap checks we observe a
significant slowdown in compilation time, down to 0.22 MiB/s in the sqlite
benchmark instead of the average of 3 MiB/s in other benchmarks. By introducing
a TrapIf common operator only a single node is necessary per trap check, in
addition to the trap condition. Also the nodes which are shared between trap
checks (merge, effect_phi, 2 phis) would disappear. First measurements suggest a
speedup of 30-50% on average.
This CL only implements TrapIf and TrapUnless on x64. The implementation is also
hidden behind the --wasm-trap-if flag.
Please take a special look at how the source position is transfered from the
instruction selector to the code generator, and at the context that is used for
the runtime call.
R=titzer@chromium.org
Review-Url: https://codereview.chromium.org/2562393002
Cr-Commit-Position: refs/heads/master@{#41720}
MIPS[64]R6 supports only fusion multiply-accumulate instructions, and using
these causes failures of several tests that expect exact floating-point
results. Therefore we disable fusion multiply-accumulate in both emitted and
compiled code on R6.
TEST=cctest/test-run-machops/RunFloat64MulAndFloat64Add1,mjsunit/es6/math-expm1.js
mjsunit/es6/math-fround.js,mjsunit/compiler/multiply-add.js
BUG=
Review-Url: https://codereview.chromium.org/2569683002
Cr-Commit-Position: refs/heads/master@{#41717}
Allocate the registers used as arguments to a call on-demand after visiting the
argument (or reciever). This means that the visited expression can use registers
that would otherwise have been allocated for arguments which haven't been
visited yet.
The reason for doing this is to avoid keeping things live in registers
unecessarily for chained function calls, which avoids a memory leak for
functions which chain a large number of calls with large temporary arguments /
recievers.
BUG=chromium:672027
Review-Url: https://codereview.chromium.org/2557173004
Cr-Commit-Position: refs/heads/master@{#41714}
Reason for revert:
LiveEdit is broken in some cases.
Original issue's description:
> Store SharedFunctionInfos of a Script in a FixedArray indexed by their ID
>
> Now that SharedFunctionInfos have a unique ID (and the IDs are dense),
> we can use them as an index into an array, instead of using a
> WeakFixedArray where we have to do a linear scan.
>
> Hooking up liveedit is a bit more involved, see
> https://docs.google.com/presentation/d/1FtNa3U7WsF5bPhY9uGoJG5Y9hnz5VBDabfOWpb4unWI/edit
> for an overview
>
> BUG=v8:5589
> R=verwaest@chromium.org,jgruber@chromium.org
>
> Committed: https://crrev.com/6595e7405769dc9d49e9568d61485efc6d468baf
> Cr-Commit-Position: refs/heads/master@{#41600}
TBR=jgruber@chromium.org,verwaest@chromium.org,yangguo@chromium.org,jochen@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5589,chromium:673950
NOPRESUBMIT=true
Review-Url: https://codereview.chromium.org/2578433002
Cr-Commit-Position: refs/heads/master@{#41684}
The assignment in default parameters (e.g., function foo(a = somedefault) { }
doesn't flow through PreParserFactory::NewAssignment even if the comment claims so.
Thus, piping through the variables is not needed.
Kudos to neis@ for pointing this out.
BUG=v8:5501
R=neis@chromium.org
Review-Url: https://codereview.chromium.org/2569983003
Cr-Commit-Position: refs/heads/master@{#41670}
Reason for revert:
Still flakes on ARM.
Original issue's description:
> [deoptimizer] Enable test that should no longer fail.
>
> R=jarin@chromium.org
> TEST=cctest/test-cpu-profiler/CollectDeoptEvents
>
> Committed: https://crrev.com/3f9c2c590d687562d6adb531d1159738c07013f4
> Cr-Commit-Position: refs/heads/master@{#41664}
TBR=jarin@chromium.org,machenbach@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/2568403003
Cr-Commit-Position: refs/heads/master@{#41667}
Generalize Messages to include an error level.
Add a parameter to AddMessageHandler to select which error levels to receive, using a mask (default being just errors, i.e. the current behavior).
BUG=v8:4203
R=dgozman@chromium.org,machenbach@chromium.org,danno@chromium.org,bmeurer@chromium.org,jochen@chromium.org
Review-Url: https://codereview.chromium.org/2526703002
Cr-Commit-Position: refs/heads/master@{#41648}
The evaluation order of this argument was accidentally changed when the
special-case was added for super calls with a final spread argument.
Review-Url: https://codereview.chromium.org/2563423002
Cr-Commit-Position: refs/heads/master@{#41633}
This fixes the corner-case where the method in question failed to lookup
the very last deoptimization bailout without subsequent entries within
the relocation info. Also enable a test covering this.
R=tebbi@chromium.org
TEST=cctest/test-cpu-profiler/CollectDeoptEvents
Review-Url: https://codereview.chromium.org/2565733002
Cr-Commit-Position: refs/heads/master@{#41623}
In the asm.js code translated to wasm, we call imported functions via a
WASM_TO_JS stub, which first calls the function and then calls ToNumber
on the return value. Exceptions can happen in both calls.
We were only ever reporting the location of the function call, whereas
asm.js code executed via turbofan reported the location of the type
coercion operator ("+" on "+foo()" or "|" on "foo()|0").
This CL implements the same behaviour for asm.js code translated to
wasm. The following is changed:
- the AsmWasmBuilder records the parent node when descending on a binary
operator (also "+foo()" is represented by a binary operation).
- it stores not one location per call in the source position side
table, but two (one for the call, one for the parent which does the
type coercion).
- the wasm compiler annotates the source positions "0" and "1" to the
two calls in the WASM_TO_JS wrapper (only if the module origin is
asm.js).
- the StackFrame::State struct now also holds the callee_pc_address,
which is set in ComputeCallerState. The WASM frame uses this
information to determine whether the callee frame is WASM_TO_JS, and
whether that frame is at the ToNumber conversion call.
- the same information is also stored in the FrameArray which is used
to reconstruct the stack trace later.
R=titzer@chromium.org, bradnelson@chromium.orgCC=jgruber@chromium.org
BUG=v8:4203,v8:5724
Committed: https://crrev.com/94cd46b55e24fa2bb7b06b3da4d5ba7f029bc262
Review-Url: https://codereview.chromium.org/2555243002
Cr-Original-Commit-Position: refs/heads/master@{#41599}
Cr-Commit-Position: refs/heads/master@{#41613}
The deserialization of the {Scope::asm_module} predicate relies on a
context being present for such modules. This ensures we always allocate
such a context, even in cases where no variables are allocated in it.
R=neis@chromium.org
TEST=cctest/test-parsing/AsmModuleFlag
BUG=v8:5653
Review-Url: https://codereview.chromium.org/2561103004
Cr-Commit-Position: refs/heads/master@{#41611}
This will be used in CSA to check if any promisehook is set.
-- Adds a is_promisehook_enabled_ field to the isolate and helper methods.
-- Adds this field to the ExternalReference table.
-- Adds a helper method to access this from CSA
Note -- this patch doesn't actually add the ability to attach the hook
yet.
BUG=v8:4643
Review-Url: https://codereview.chromium.org/2566483002
Cr-Commit-Position: refs/heads/master@{#41607}
Reason for revert:
gc-stress failures
Original issue's description:
> [wasm] Fix location for error in asm.js ToNumber conversion
>
> In the asm.js code translated to wasm, we call imported functions via a
> WASM_TO_JS stub, which first calls the function and then calls ToNumber
> on the return value. Exceptions can happen in both calls.
> We were only ever reporting the location of the function call, whereas
> asm.js code executed via turbofan reported the location of the type
> coercion operator ("+" on "+foo()" or "|" on "foo()|0").
>
> This CL implements the same behaviour for asm.js code translated to
> wasm. The following is changed:
> - the AsmWasmBuilder records the parent node when descending on a binary
> operator (also "+foo()" is represented by a binary operation).
> - it stores not one location per call in the source position side
> table, but two (one for the call, one for the parent which does the
> type coercion).
> - the wasm compiler annotates the source positions "0" and "1" to the
> two calls in the WASM_TO_JS wrapper (only if the module origin is
> asm.js).
> - during stack trace generation (in the StackTraceIterator), when we
> move from the WASM_TO_JS frame to the WASM frame, we remember at which
> call inside the WASM_TO_JS wrapper we are, and encode this information
> in the generated caller state, used for the WASM frame.
> - the same information is also stored in the FrameArray which is used
> to reconstruct the stack trace later.
>
> R=titzer@chromium.org, bradnelson@chromium.org
> CC=jgruber@chromium.org
> BUG=v8:4203,v8:5724
>
> Committed: https://crrev.com/94cd46b55e24fa2bb7b06b3da4d5ba7f029bc262
> Cr-Commit-Position: refs/heads/master@{#41599}
TBR=bradnelson@chromium.org,mstarzinger@chromium.org,titzer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4203,v8:5724
Review-Url: https://codereview.chromium.org/2563613003
Cr-Commit-Position: refs/heads/master@{#41601}
In the asm.js code translated to wasm, we call imported functions via a
WASM_TO_JS stub, which first calls the function and then calls ToNumber
on the return value. Exceptions can happen in both calls.
We were only ever reporting the location of the function call, whereas
asm.js code executed via turbofan reported the location of the type
coercion operator ("+" on "+foo()" or "|" on "foo()|0").
This CL implements the same behaviour for asm.js code translated to
wasm. The following is changed:
- the AsmWasmBuilder records the parent node when descending on a binary
operator (also "+foo()" is represented by a binary operation).
- it stores not one location per call in the source position side
table, but two (one for the call, one for the parent which does the
type coercion).
- the wasm compiler annotates the source positions "0" and "1" to the
two calls in the WASM_TO_JS wrapper (only if the module origin is
asm.js).
- during stack trace generation (in the StackTraceIterator), when we
move from the WASM_TO_JS frame to the WASM frame, we remember at which
call inside the WASM_TO_JS wrapper we are, and encode this information
in the generated caller state, used for the WASM frame.
- the same information is also stored in the FrameArray which is used
to reconstruct the stack trace later.
R=titzer@chromium.org, bradnelson@chromium.orgCC=jgruber@chromium.org
BUG=v8:4203,v8:5724
Review-Url: https://codereview.chromium.org/2555243002
Cr-Commit-Position: refs/heads/master@{#41599}
Fix 7a6f294ffe.
The first correction enables correct execution DoMathMinMax when two
input registers are the same register.
The second correction adds NOP instructions after branch instructions
in tests macro_float_minmaxf(32|64).
TEST=cctest/test-macro-assembler-mips[64]/macro_float_minmax_f32
cctest/test-macro-assembler-mips[64]/macro_float_minmax_f64
mjsunit/regress/math-min
BUG=
Review-Url: https://codereview.chromium.org/2556793003
Cr-Commit-Position: refs/heads/master@{#41596}
Aside from the default snapshot, there is no need for additional context
snapshots to have the ability to replace the global proxy and global object
after deserialization. Changes include:
- Changes to the API to better distinguish default context snapshot from
additional context snapshots.
- Disallow global handles when creating snapshots.
- Allow extensions when creating snapshots.
This solves the issue of not being able to having accessors and interceptors on
the global object of contexts to be serialized.
R=jochen@chromium.org, peria@chromium.org
BUG=chromium:617892
Review-Url: https://codereview.chromium.org/2557743003
Cr-Commit-Position: refs/heads/master@{#41588}
The patch was reverted due to a bug - we failed to evict OSR-optimized
code in the case where the SharedFunctionInfo OptimizedCodeMap was
empty/cleared.
Since we OSR code rarely, it makes sense to store it and look for it on the native context rather than the SharedFunctionInfo. This makes the OptimizedCodeMap data structure more space efficient, as it doesn't have to store an ast ID for the OSR entry point.
Review-Url: https://codereview.chromium.org/2561083002
Cr-Commit-Position: refs/heads/master@{#41584}
This CL attempts to set the maybe-assigned flag for variables that are written
to as part of a destructuring or loop header.
For instance, in the following two cases we now mark x as maybe-assigned.
a) [x] = [1];
b) for (x of [1,2,3]) {};
There's more work to do here, this is just a first step.
R=adamk@chromium.org, mstarzinger@chromium.org
BUG=v8:5636
Review-Url: https://codereview.chromium.org/2562443003
Cr-Commit-Position: refs/heads/master@{#41582}
Currently when the number passed to TryNumberToSize is 1 << 64,
it gets away with a bug caused by rounding of mantissa.
Then the number will be casted to 0 and TryNumberToSize
will return true. This patch fix this by making the range check
more accurate.
BUG=v8:5712
Review-Url: https://codereview.chromium.org/2548243004
Cr-Commit-Position: refs/heads/master@{#41578}
-- Moves promiseHasHandlerSymbol to inobject property
-- Ports PromiseResolveClosure to TF
-- Fix a non spec async-await test which fails now because we do a map
check for native promise check (instead of IsPromise). Changing the
constructor (in the test) invalidates the map check.
This patch results in a 7.1% performance improvement in the bluebird
benchmark (over 5 runs).
BUG=v8:5343
Review-Url: https://codereview.chromium.org/2541283002
Cr-Commit-Position: refs/heads/master@{#41569}
jasongin@ created this patch.
dcc50445a3
This patch adds the support to emit a trace event by using a comma-separated
list of categories, so that the trace event will be emitted if there is at least
one category is enabled in the categories list.
TBR=jochen@chromium.org
Review-Url: https://codereview.chromium.org/2558193002
Cr-Commit-Position: refs/heads/master@{#41567}
When v8 fails an access check, it invokes a helper to try to see if it
can service the request via an access check interceptor. Invoking the
access check interceptor can throw an exception (e.g. a SecurityError).
Unfortunately, the failed access check property helpers and the
interceptor helpers don't agree on how to propagate the exception: if
the interceptor helper detects a scheduled exception, it promotes the
exception to a pending exception and returns to the failed access check
property helper.
The failed access check property helper also has an early return in
case of a scheduled exception. However, this doesn't work, as the
previously thrown exception is no longer scheduled, as it's been
promoted to a pending exception. Thus, the failed access check property
helper always end up calling the failed access check callback as well.
Since Blink's implementation of the failed access check callback also
throws an exception, this conflicts with the previously-thrown,
already-pending exception.
With this patch, the failed access check property helpers check for a
pending exception rather than a scheduled exception after invoking the
interceptor, so the exception can be propagated correctly.
BUG=v8:5715
R=yangguo@chromium.org,jochen@chromium.org
Review-Url: https://codereview.chromium.org/2550423002
Cr-Commit-Position: refs/heads/master@{#41556}
Introduces:
- a new AST node representing the GetIterator() algorithm in the specification, to be used by ForOfStatement, YieldExpression (in the case of delegating yield*), and the future `for-await-of` loop proposed in http://tc39.github.io/proposal-async-iteration/#sec-async-iterator-value-unwrap-functions.
- a new opcode (JumpIfJSReceiver), which is useful for `if Type(object) is not Object` checks which are common throughout the specification. This node is easily eliminated by TurboFan.
The AST node is desugared specially in bytecode, rather than manually when building the AST. The benefit of this is that desugaring in the BytecodeGenerator is much simpler and easier to understand than desugaring the AST.
This also reduces parse time very slightly, and allows us to use LoadIC rather than KeyedLoadIC, which seems to have better baseline performance. This results in a ~20% improvement in test/js-perf-test/Iterators micro-benchmarks, which I believe owes to the use of the slightly faster LoadIC as opposed to the KeyedLoadIC in the baseline case. Both produce identical optimized code via TurboFan when the type check can be eliminated, and the load can be replaced with a constant value.
BUG=v8:4280
R=bmeurer@chromium.org, rmcilroy@chromium.org, adamk@chromium.org, neis@chromium.org, jarin@chromium.orgTBR=rossberg@chromium.org
Review-Url: https://codereview.chromium.org/2557593004
Cr-Commit-Position: refs/heads/master@{#41555}
