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}
Fixes a crash found by clusterfuzz caused by a call to
std::vector::reserve with a huge capacity, and reverts to ZoneList
handling as a tentative fix for performance regressions on the slow
@@replace path.
BUG=chromium:707187,chromium:706748,v8:5437
Review-Url: https://codereview.chromium.org/2787343002
Cr-Commit-Position: refs/heads/master@{#44311}
The last CL https://chromium-review.googlesource.com/c/456707/ caused
some pretty heavy performance regressions. After experimenting, it
seems the easiest and most straight-forward way to copy the elements
into the new typed array is to do it in JS.
Adds a fast path for typed arrays, where the source typed array has
the same elements kind, in which case we can just copy the backing
store using memcpy.
This CL also removes regression test 319120 which is from a pwn2own
vulnerability. The old code path enforced a maximum byte_length
that was too low, which this change removes. The length property of
the typed array must be a Smi, but the byte_length, which can be up
to 8x larger than length for a Float64Array, can be a heap number.
We can also re-use some of the logic from ConstructByLength when
deciding whether to allocate the buffer on- or off-heap, so that
is factored out into InitializeBasedOnLength. We can also re-use
the DoInitialize helper instead of calling into the runtime,
meaning we can remove InitializeFromArrayLike.
BUG=v8:5977,chromium:705503,chromium:705394
Change-Id: I63372652091d4bdf3a9491acef9b4e3ac793a755
Reviewed-on: https://chromium-review.googlesource.com/459621
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44301}
The test was out-dated. The wasm bytes still had the version 0xd, and
no END instruction at the end of the function. In addition, the test
used asynchronous compilation but did not wait for the promise to
resolve.
R=clemensh@chromium.org
Change-Id: Ib01f47ac8f668401ed14470af7100e990e5bbd94
Reviewed-on: https://chromium-review.googlesource.com/463286
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44276}
The inlining logic doesn't account for the fact that the derived
constructor could return a primitive, thus leaking the implicit
receiver (which is the hole).
R=jarin@chromium.org
BUG=chromium:706642
Review-Url: https://codereview.chromium.org/2788603002
Cr-Commit-Position: refs/heads/master@{#44264}
The int64-lowering lowers return nodes which return one int64 value into
a return node which returns two int32 values. For this lowering it has
to adjust the input count of the return operator.
The existing code assumed that if the signature of a function said that
the return type is int64, then all return nodes have int64 inputs.
However, with a recent CL we also introduced void returns. With this CL
I check if the number of inputs of a return node changes with the
DefaultLowering, and only if the number of inputs changes, then I check
if I also have to change the operator of the return node.
R=mstarzinger@chromium.org
TEST=mjsunit/regress/wasm/regression-6164
BUG=v8:6164
Change-Id: I004ab1b4be942cc045719f306705d95b48707a1c
Reviewed-on: https://chromium-review.googlesource.com/461941
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44232}
Compilation can fail e.g. on stack overflow. This ensures that we exit
early from StringReplaceGlobalRegExpWithString in that case.
BUG=v8:5437,chromium:705934
Review-Url: https://codereview.chromium.org/2778953004
Cr-Commit-Position: refs/heads/master@{#44215}
As far as I can see, we have had this bug as long as destructuring assignments
have been there (i.e., this is not regression).
The problem was that Parser::DoParseFunction parsed the arrow function parameters
but didn't rewrite the destructuring assignments in them.
BUG=chromium:704811
Change-Id: I0b1424e7d5103eda6efd51b403fe81a4ee235e01
Reviewed-on: https://chromium-review.googlesource.com/459618
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44177}
This reverts commit 6ad5ca59c9.
Reason for revert: Breaks on noi18n bot, needs fix in the new regression test
Original change's description:
> [wasm] Check the result of Promise::Resolver
>
> We check that if we do not get a result, or if we get a negative result,
> then there has to be a scheduled exception.
>
> R=clemensh@chromium.org
> TEST=mjsunit/regress/wasm/regression-704127
> BUG=chromium:704127
>
> Change-Id: I3fef3cc02f685a9cbc3f10203e2a59b61b3702d5
> Reviewed-on: https://chromium-review.googlesource.com/458282
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Commit-Queue: Andreas Haas <ahaas@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#44144}
TBR=ahaas@chromium.org,clemensh@chromium.org,v8-reviews@googlegroups.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:704127
Change-Id: Ibf6d27929c88064bc2755688358998640092e31a
Reviewed-on: https://chromium-review.googlesource.com/459512
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44145}
We check that if we do not get a result, or if we get a negative result,
then there has to be a scheduled exception.
R=clemensh@chromium.org
TEST=mjsunit/regress/wasm/regression-704127
BUG=chromium:704127
Change-Id: I3fef3cc02f685a9cbc3f10203e2a59b61b3702d5
Reviewed-on: https://chromium-review.googlesource.com/458282
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44144}
Since we no longer support the ignition-staging configuration
any longer, we can retire the three tier pipeline and the
CompileBaseline functionallity.
We still need support for JSFunction self healing due to
liveedit (which for --no-turbo might end up replacing a
forced Ignition function with a FCG function) - we can
remove this once we remove --no-turbo support.
BUG=v8:4280
Change-Id: I5482abd17785324654e022affd6bdb555b19b181
Reviewed-on: https://chromium-review.googlesource.com/452620
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@{#44141}
The stack check at the beginning of each function maps to the wasm byte
offset 0. For asm.js functions, this byte offset is mapped further to an
asm.js source position. For most functions, we explicitly add an entry
to this side table for offset 0. This was missing for the start
function.
R=ahaas@chromium.org
BUG=v8:4203,chromium:703568
Change-Id: I05bc4a8cfa666864bb7a0b23f75186abe0be9bee
Reviewed-on: https://chromium-review.googlesource.com/458437
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44037}
This fixes a corner case where the "instance prototype" diverges from
the "non-instance prototype" that we store on the initial map of a
constructor function.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-703610
BUG=chromium:703610
Change-Id: I30a19ae621e10b512215ffb191ce00d030941440
Reviewed-on: https://chromium-review.googlesource.com/458396
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44008}
This fixes a bug where an exported function is being specialized, but
the callsite inside the JS_TO_WASM function was patched to call an
interpreter entry instead. We would not identify the call site as the
one to be patched during specialization, and would thus fail a DCHECK.
R=ahaas@chromium.org
BUG=v8:5822, chromium:702839
Change-Id: I148d98333051c399a4cb11bd9620b396f4eb261d
Reviewed-on: https://chromium-review.googlesource.com/456282
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43942}
We use LoadFromPrototype also for direct global loads. InitPrototypeChecks did not support this though, and would create a prototype chain check for objects beyond the direct global. This tries to ensure the property on the global itself doesn't exist, which is invalid.
Additionally this CL deletes duplicate code.
BUG=chromium:702798,v8:5561
Change-Id: I318a5b6cd5f7c3efdb3a003e34edd37d5d3f880b
Reviewed-on: https://chromium-review.googlesource.com/457369
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43935}
Don't ignore IfException (and IfSuccess) projections on JSForInNext
nodes during JSTypedLowering::ReduceJSForInNext, but instead rewrire
the IfException projection to the ForInFilter stub call, which can
throw exceptions in case of proxies.
R=yangguo@chromium.org
BUG=v8:6121
Review-Url: https://codereview.chromium.org/2761703002
Cr-Commit-Position: refs/heads/master@{#43925}
BUG=chromium:702793
Change-Id: Ia52823968a757f8f7fc8802deab60f570ffdb58c
Reviewed-on: https://chromium-review.googlesource.com/456280
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43920}
The fast-path for Array.prototype.indexOf first checks whether the
receiver is a fast-mode JSArray (and there are no elements in the
prototype chain in case of holey arrays), then loads the known
JSArray::length, and afterwards calls ToInteger on the fromIndex.
But this ToInteger(fromIndex) call can cause arbitrary side effects if
the fromIndex is a JSReceiver, in particular it can invalidate the
assumptions about the fast-mode of the receiver and the length. In the
worst case this leads to OOB memory access.
Quick-fix is to bailout to the runtime if the fromIndex is neither a Smi
nor undefined, which represents the common cases.
R=jarin@chromium.org
BUG=chromium:702058
Review-Url: https://codereview.chromium.org/2756663002
Cr-Commit-Position: refs/heads/master@{#43843}
Removes the --ignition-staging flag since it is no longer used
by anything and won't be a shipping configuration. Also removes
ignition_turbo variant from testrunner, since it is now
the same as the turbofan variant.
BUG=v8:4280
Change-Id: I3b96e986879fc70b8e202fe9496334828acdd0ba
Reviewed-on: https://chromium-review.googlesource.com/452621
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@{#43806}
This fixes a corner-case in {KeyAccumulator::CollectOwnJSProxyKeys}
where the keys returned by {JSReceiver::OwnPropertyKeys} for an array
are not internalized and hence have a diverging identity from keys
returned by the "ownKeys" trap of a proxy.
R=cbruni@chromium.org
TEST=mjsunit/regress/regress-crbug-700678
BUG=chromium:700678
Change-Id: I5efd012eade14bd45c69e4abb0aeda684baf38f0
Reviewed-on: https://chromium-review.googlesource.com/452979
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43775}
The optimization
NumberFloor(NumberDivide(lhs, rhs))
to
NumberToInt32(NumberDivide(lhs, rhs))
for potentially negative lhs is not valid, since Math.floor rounds
towards -infinity, whereas ToInt32 truncates.
BUG=chromium:699282
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2743673002
Cr-Commit-Position: refs/heads/master@{#43699}
This fixes an incorrect usage of String::Flatten in EscapeRegExpSource.
It also adds %ConstructConsString (to easily and reliably construct cons
strings in tests) and Factory::NewConsString (to enable guaranteed cons
string construction without preemptive flattening attempts).
BUG=chromium:698790
Review-Url: https://codereview.chromium.org/2736383003
Cr-Commit-Position: refs/heads/master@{#43686}
The immediate passed to cmpw can be either a signed 16-bit or an
unsigned 16-bit integer, but the DCHECK was testing for signed 16-bit
values only.
R=mstarzinger@chromium.org
BUG=v8:6063
Review-Url: https://codereview.chromium.org/2735363002
Cr-Commit-Position: refs/heads/master@{#43671}
From asm.js code we might get an empty ArrayBuffer as heap memory. In
this case, both the old memory start and the new memory start will be
nullptr. The size however has to be patched from default_size to 0.
This CL changes code specialization to be able to either patch memory
references, or patch memory sizes or both.
R=titzer@chromium.org, ahaas@chromium.org
BUG=chromium:698587
Change-Id: I4d9d811d75cb83842f23df317e8e7fc02aeb5146
Reviewed-on: https://chromium-review.googlesource.com/450257
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43613}
This involved adding a count_ member to SloppyBlockFunctionMap, so
to avoid making DeclarationScope larger, this patch makes the
creation of the map lazy, thus reducing the size of DeclarationScope
by several words in the process.
BUG=chromium:688567
Change-Id: If9a9eb2ccc01690fe10edadb3aa9625454ff4a19
Reviewed-on: https://chromium-review.googlesource.com/448701
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43558}
String::SlowFlatten assumed that ConsStrings with empty first parts have
flattened strings as their second part. TurboFan, however, can create
ConsStrings with empty first parts and arbitrary second parts. With
this CL we call String::Flatten on the second part of a ConsString if
the first part is empty, but only when String::Flatten would not call
String::SlowFlatten.
R=jkummerow@chromium.org
BUG=chromium:696651
Change-Id: I9acb681de1be695e1ec2f6f6d28b9e4dc4344e98
Reviewed-on: https://chromium-review.googlesource.com/448457
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43513}
The maybe-assigned flag of the catch variable was not preserved.
BUG=v8:5636,chromium:696332
Change-Id: I9c55e1b1312bdebc53bc45bc3ca1c982bdbe9846
Reviewed-on: https://chromium-review.googlesource.com/447680
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43506}
Previously, we over-approximated Scope::scope_calls_eval_ in
arrow functions: if either the outer scope or the arrow function
parameters had a direct eval call, we marked both scopes as calling
eval. This over-approximation kept getting us into trouble, though,
especially when eager or lazy parsing would disagree about the
"calls eval" bit.
This patch instead tracks eval calls accurately, using a boolean on
Scope::Snapshot that is reset as appropriately depending on whether
a particular AssignmentExpression turned out to be an arrow parameter
list or not.
BUG=chromium:691687
Change-Id: I527dc59b4d32a2797805ff26dc9f70b1311377b2
Reviewed-on: https://chromium-review.googlesource.com/446094
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43499}
The above intrinsic by now has to perform a check whether the prototype
of a derived constructor is actually a constructor function itself. This
is done as part of the {JSGetConstructorCall} operator. The intrinsic
should just reduce down to the operator to maintain correct semantics.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-696622
BUG=chromium:696622
Change-Id: Ia19c188f17ad16b12248db1f01a01b8d7258499b
Reviewed-on: https://chromium-review.googlesource.com/447716
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43479}
When an instance of a constructor goes dictionary mode, this changes the initial map
of that constructor to also be in dictionary mode. This avoids spurious hidden class
creation, that also results in IC misses.
BUG=
Change-Id: I0e70f822ac345d0224f2092ec473621a603d4cc5
Reviewed-on: https://chromium-review.googlesource.com/446361
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43452}
This fixes a corner-case where the call reduction of the aforementioned
getter did not simulate the {ToObject} conversion of the receiver value
as required by the spec. This caused the wrong prototype to be constant
promoted (i.e. {null} instead of wrapper object prototype).
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-694709
BUG=chromium:694709
Change-Id: Idf3a37071949d9ddaf5ef43974570c06fd31c0c9
Reviewed-on: https://chromium-review.googlesource.com/445818
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43376}
This fixes a missing name check for keyed property loads targeting the
global object where the feedback was warmed up with a single name. This
affects {JSLoadProperty} nodes only, syntactic global property loads via
the {JSLoadGlobal} operator are not affected.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-694416
BUG=chromium:694416
Change-Id: I54aa3f27eaa72630539f02602ec7642b04835b27
Reviewed-on: https://chromium-review.googlesource.com/445224
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43344}
info.This returns a Local<Object>, which results in a call to
Utils::OpenHandle<JSReceiver>. Casting to a Local<Value> first uses the
correct OpenHandle<Object> overload.
BUG=chromium:693500
Review-Url: https://codereview.chromium.org/2706833002
Cr-Commit-Position: refs/heads/master@{#43314}
The bytecode generator did not necessarily know for which scope, and
thus language mode, it was generating code, because it only tracked
scopes that have a context. This led to wrong behavior in some
examples involving class expressions (which are always in strict
mode).
With this CL, the bytecode generator explicitly tracks the current
scope, independent of whether it has a context.
BUG=v8:5927
Change-Id: Ifa6b3ee5e13e07b63d00e74c7f557a328633c88b
Reviewed-on: https://chromium-review.googlesource.com/444785
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43300}
Currently, typeof o, where o is an undetectable
callable object (such as document.all), returns 'function' if
optimised. It should, however, return 'undefined'.
This CL excludes undetectable objects from the optimization
resulting in type 'function' and renames the related code to
reflect that.
BUG=v8:5972
R=bmeurer@chromium.org
Review-Url: https://codereview.chromium.org/2697063002
Cr-Commit-Position: refs/heads/master@{#43298}
One optimization in the machine-operator-reducer did not consider that
that word32 shift left instructions only consider the last 5 bits of
the shift input.
The issue only occurs for WebAssembly because in JavaScript we always
add a "& 0xf" on the shift value to the TurboFan graph.
For additional background: The JavaScript and WebAssembly spec both
say that only the last 5 bits of the shift value are used in the
word32-shift-left operation. This means that an "x << 0x29", in the
code is actually executed as "x << 0x09". Therefore the changes in
this CL are okay because they mask the last 5 bit of the shift value.
BUG=chromium:689450
Change-Id: Id92f298ed6d7f1714b109b3f4fbcecd5ac6d30f7
Reviewed-on: https://chromium-review.googlesource.com/439312
Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43245}
@@replace has a pretty complex implementation, taking different paths
for various situations (e.g.: global/nonglobal regexp, functional/string
replace argument, etc.). Each of these paths must implement similar
logic for calling into the RegExpBuiltinExec spec operation, and many
paths get this subtly wrong.
This CL fixes a couple of issues related to the way @@replace handles lastIndex:
* All paths now respect lastIndex when calling into exec (some used to assume 0).
* lastIndex is now advanced after a successful match for sticky regexps.
* lastIndex is now only reset to 0 on failure for sticky regexps.
BUG=v8:5361
Review-Url: https://codereview.chromium.org/2685183003
Cr-Commit-Position: refs/heads/master@{#43234}
The mips64 implementation always ended up in the slowpath due to some
loads that were the wrong width, so that is also fixed here.
BUG=v8:5974
Change-Id: Ie448a1fab5b7fca87597c5a1bf75443864e30c28
Reviewed-on: https://chromium-review.googlesource.com/443247
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43222}
ParserBase::is_any_identifier currently does not recognise
Token::ESCAPED_STRICT_RESERVED_WORD as an identifier. This seems different
from what ParserBase::ParseIdentifierName does, and also prevents
"l\u0065t", unlike "let", from becoming a label.
This CL extends is_any_identifier to also accept ESCAPED_STRICT_RESERVED_WORD.
BUG=v8:5692
Review-Url: https://codereview.chromium.org/2695973003
Cr-Commit-Position: refs/heads/master@{#43204}
This adds support for deoptimizing into the JSConstructStub after the
receiver instantiation but before the actual constructor invocation.
Such a deoptimization point is needed for cases where instantiation
might be observed (e.g. when new.target is a proxy) and hence might
trigger a deopt.
We use this new deoptimization point for the "after" frame-state the
inliner attaches to {JSCreate} nodes being inserted when constructor
calls are being inlined.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-5638b
BUG=v8:5638
Change-Id: I7c72c807ee8fb76d12e0e9ccab86d970ab1a0efd
Reviewed-on: https://chromium-review.googlesource.com/440125
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43149}
We cannot skip the @@hasInstance lookup in instanceof depending on a
global protector cell, as the lookup of the property is observable
via proxies or accessors. So remove the global protector and properly
implement CSA::InstanceOf via GetPropertyStub, with an appropriate
fast-path for Function.prototype[@@hasInstance] where we call the
builtin code object directly if the function matches, skipping all
the checks from the call sequence, and also avoid the redundant
ToBoolean conversion on the result.
R=yangguo@chromium.orgTBR=ulan@chromium.org
BUG=v8:5958
Review-Url: https://codereview.chromium.org/2684033012
Cr-Commit-Position: refs/heads/master@{#43137}
This fixes the case where the index passed to {HMaybeGrowElements} used
to derive the new capacity for the elements backing store does not fit
into Smi range. Such an overflow would fail the capacity check and cause
growing to be skipped. Subsequent keyed stores would potentially go out
of bounds.
R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-crbug-686427
BUG=chromium:686427
Review-Url: https://codereview.chromium.org/2686263002
Cr-Commit-Position: refs/heads/master@{#43101}
Collect code coverage from the available invocation counts.
The granularity is at function level, and invocation counts may
be lost to GC.
Coverage::Collect returns a std::vector of Coverage::ScriptData.
Each ScriptData contains a script ID and a std::vector of
Coverage::RangeEntry.
Each RangeEntry consists of a end position and the invocation
count. The start position is implicit from the end position of
the previous RangeEntry, or 0 if it's the first RangeEntry.
R=jgruber@chromium.org
BUG=v8:5808
Review-Url: https://codereview.chromium.org/2689493002
Cr-Commit-Position: refs/heads/master@{#43072}
E.g.,
{ function lazy_inner(b = somevar) { let somevar; } }
If we don't produce the same scopes, PreParser thinks that the unresolved
variable inside the default parameter resolves into the variable declared inside
the function. Thus, it's not correctly recorded as a free variable.
One part is already done by https://codereview.chromium.org/2638333002 . But at
the laziness boundary, we still produced different scopes.
Unlike previously thought, this is also needed for lazy inner function
correctness, not only for "preparser scope analysis" (ie., skipping inner
functions).
BUG=v8:5938
Change-Id: I047cd43ef16478bb0f18d1f114845e7d1ab8c5f2
Reviewed-on: https://chromium-review.googlesource.com/439345
Commit-Queue: Marja Hölttä <marja@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43044}
The testb instruction requires the REX prefix when either of its
operands uses a register with the high bit set. The existing code only
considered the register operand. In the test case the REX prefix was not
emitted because the testb instruction had the register operand RAX which
does not have the high bit set. The REX prefix was necessary though
because the memory operand used R8, which has the high bit set.
R=bmeurer@chromium.org
BUG=chromium:688876
Change-Id: Ib214bebbe75965664f2aea530e29afa95a54f44f
Reviewed-on: https://chromium-review.googlesource.com/439145
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43030}
Reason for revert:
False alarm, bot hiccup
Original issue's description:
> Revert of [parsing] Fix maybe-assigned for loop variables. (patchset #3 id:40001 of https://codereview.chromium.org/2673403003/ )
>
> Reason for revert:
> Speculative revert because of https://codereview.chromium.org/2679163002/.
>
> Original issue's description:
> > [parsing] Fix maybe-assigned for loop variables.
> >
> > Due to hoisting, the value of a 'var'-declared variable may actually change even
> > if the code contains only the "initial" assignment, namely when that assignment
> > occurs inside a loop. For example:
> >
> > let i = 10;
> > do { var x = i } while (i--):
> >
> > As a simple and very conservative approximation of this, we explicitly mark
> > as maybe-assigned any non-lexical variable whose "declaration" does not
> > syntactically occur in the function scope. (In the example above, it
> > occurs in a block scope.)
> >
> > BUG=v8:5636
> >
> > Review-Url: https://codereview.chromium.org/2673403003
> > Cr-Commit-Position: refs/heads/master@{#42989}
> > Committed: a33fcd663b
>
> TBR=marja@chromium.org,adamk@chromium.org,neis@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:5636
>
> Review-Url: https://codereview.chromium.org/2679263002
> Cr-Commit-Position: refs/heads/master@{#43010}
> Committed: f3ae5ccf57TBR=marja@chromium.org,adamk@chromium.org,neis@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5636
Review-Url: https://codereview.chromium.org/2686663002
Cr-Commit-Position: refs/heads/master@{#43013}
Reason for revert:
Speculative revert because of https://codereview.chromium.org/2679163002/.
Original issue's description:
> [parsing] Fix maybe-assigned for loop variables.
>
> Due to hoisting, the value of a 'var'-declared variable may actually change even
> if the code contains only the "initial" assignment, namely when that assignment
> occurs inside a loop. For example:
>
> let i = 10;
> do { var x = i } while (i--):
>
> As a simple and very conservative approximation of this, we explicitly mark
> as maybe-assigned any non-lexical variable whose "declaration" does not
> syntactically occur in the function scope. (In the example above, it
> occurs in a block scope.)
>
> BUG=v8:5636
>
> Review-Url: https://codereview.chromium.org/2673403003
> Cr-Commit-Position: refs/heads/master@{#42989}
> Committed: a33fcd663bTBR=marja@chromium.org,adamk@chromium.org,neis@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5636
Review-Url: https://codereview.chromium.org/2679263002
Cr-Commit-Position: refs/heads/master@{#43010}
Due to hoisting, the value of a 'var'-declared variable may actually change even
if the code contains only the "initial" assignment, namely when that assignment
occurs inside a loop. For example:
let i = 10;
do { var x = i } while (i--):
As a simple and very conservative approximation of this, we explicitly mark
as maybe-assigned any non-lexical variable whose "declaration" does not
syntactically occur in the function scope. (In the example above, it
occurs in a block scope.)
BUG=v8:5636
Review-Url: https://codereview.chromium.org/2673403003
Cr-Commit-Position: refs/heads/master@{#42989}
For x64, ia32 and x87 we would pop the return address before the stack
overflow check. This meant the stack couldn't be unwound properly if
it was going to overflow. This CL moves the pop of the return address
to after the stack overflow check.
Also adds a regression test to check that a RangeError is thrown.
BUG=689016
Review-Url: https://codereview.chromium.org/2681643004
Cr-Commit-Position: refs/heads/master@{#42984}
This correctly marks the {JSCreate} operator as potentially throwing,
since it might trigger a property access of the 'prototype' property
during instantiation. This is observable, can throw (not kNoThrow),
might have side-effects (not kNoWrite), or even trigger a lazy deopt
event (not kNoDeopt). The inlining logic has been adapted to wire up
control projections accordingly.
Note that this does not yet take care of the "after" frame-state which
is associated with the {JSCreate} node introduced by the inliner. We
still might re-evaluate the property access upon lazy deoptimization.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-5638
BUG=v8:5638
Review-Url: https://codereview.chromium.org/2671203003
Cr-Commit-Position: refs/heads/master@{#42981}
TailCallRuntime currently does not seem to handle adaptor frames
correctly.
BUG=chromium:688690
Review-Url: https://codereview.chromium.org/2675133003
Cr-Commit-Position: refs/heads/master@{#42950}
Using .caller, one can get access to the internal function that invokes the
handler passed to Promise.prototype.then. This internal function is a TF
builtin that was set up as non-native and without an argument adaptor. As a
consequence of this, when accessing .arguments on it, the frame-walking logic in
the .arguments accessor thinks the number of arguments is -1 and we try to
allocate an array of size -1.
This CL marks the builtin function as native (making its .arguments be null),
along with a few others that may have been incorrect in the same way.
BUG=chromium:682349
Review-Url: https://codereview.chromium.org/2672453002
Cr-Commit-Position: refs/heads/master@{#42855}
Also updated some tests due to the change. The general pattern is when a
trailing comma is expected to cause a SyntaxError, an additional comma was
added.
BUG=v8:5051
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
Review-Url: https://codereview.chromium.org/2638513002
Cr-Commit-Position: refs/heads/master@{#42826}
The KeyedStoreMode that we get out of the FeedbackNexus doesn't
necessarily need to apply when we have "static knowledge" about
the receiver, i.e. when the receiver is a known JSTypedArray, but
the KEYED_STORE_IC has seen only JSArray instances so far. The
DCHECK was too restrictive in this case, since we can just ignore
the KEYED_STORE_IC mode (like we ignore the maps).
BUG=chromium:685050
R=ishell@chromium.org
Review-Url: https://codereview.chromium.org/2668643002
Cr-Commit-Position: refs/heads/master@{#42810}
We were missing a case for Tagged->TaggedSigned conversions when the
input type is known to be Type::SignedSmall.
BUG=chromium:687029
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2666863002
Cr-Commit-Position: refs/heads/master@{#42809}
We cannot eliminate unused CheckFloat64Hole nodes, since loading from a
holey array can have side-effects, i.e. triggering getters in the
prototype chain.
R=mvstanton@chromium.org
BUG=chromium:686737
Review-Url: https://codereview.chromium.org/2665123002
Cr-Commit-Position: refs/heads/master@{#42806}
The StringIndexOf operation is pure on the JS level, but the actual stub
call must be in the effect chain later so that the Scheduler doesn't
place it inside some allocation region (The %StringIndexOf runtime
function may trigger a GC for string flattening).
BUG=chromium:685580
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2657243002
Cr-Commit-Position: refs/heads/master@{#42736}
The mentioned asserts did not work properly with interpreted and turbofanned functions.
To fix this issue %GetOptimizationStatus() now returns a set of flags instead of a single value.
This CL also adds more helper functions to mjsunit, like isNeverOptimize(), isAlwaysOptimize(),
isOptimized(fun), etc.
BUG=v8:5890
Review-Url: https://codereview.chromium.org/2654733004
Cr-Original-Commit-Position: refs/heads/master@{#42703}
Committed: d1ddec7857
Review-Url: https://codereview.chromium.org/2654733004
Cr-Commit-Position: refs/heads/master@{#42731}
Previously, when restarting a frame, we would rewrite all frames
between the debugger activation and the frame to restart to squash
them, and replace the return address with that of a builtin to
leave that rewritten frame, and restart the function by calling it.
We now simply remember the frame to drop to, and upon returning
from the debugger, we check whether to drop the frame, load the
new FP, and restart the function.
R=jgruber@chromium.org, mstarzinger@chromium.org
BUG=v8:5587
Review-Url: https://codereview.chromium.org/2636913002
Cr-Commit-Position: refs/heads/master@{#42725}
This corrects the case when we need to allocate a
blocked register, but the blockage happens after a
use as an instruction input, and there's no place to
split before that.
BUG=v8:5888
Review-Url: https://codereview.chromium.org/2652153005
Cr-Original-Commit-Position: refs/heads/master@{#42706}
Committed: ca779b29a6
Review-Url: https://codereview.chromium.org/2652153005
Cr-Commit-Position: refs/heads/master@{#42710}
This CL adds --crankshaft and --no-always-opt flags to the tests that use
assertOptimized() and assertUnoptimized() respectively.
This CL also adds presubmit checks that ensure that tests have the proper
flags set.
BUG=v8:5890
Review-Url: https://codereview.chromium.org/2653753007
Cr-Commit-Position: refs/heads/master@{#42709}
Reason for revert:
Introduces new crashers, e.g.
load("test/mjsunit/wasm/wasm-constants.js");
load("test/mjsunit/wasm/wasm-module-builder.js");
(function() {
var builder = new WasmModuleBuilder();
builder.addMemory(16, 32, false);
builder.addFunction("test", kSig_i_iii)
.addBodyWithEnd([
// body:
kExprI64Const, 0x42,
kExprI64Const, 0x7a,
kExprI64Ctz,
kExprI64Mul,
kExprI64Ctz,
kExprI64Const, 0x41,
kExprI64Ctz,
kExprI64Ctz,
kExprI64Shl,
kExprI64Const, 0x41,
kExprI64Ctz,
kExprI64Ctz,
kExprI64Shl,
kExprF32SConvertI64,
kExprUnreachable,
kExprEnd, // @20
])
.exportFunc();
var module = builder.instantiate();
module.exports.test(1, 2, 3);
})();
Original issue's description:
> [turbofan] Correct regalloc blocked register behavior
>
>
> This corrects the case when we need to allocate a
> blocked register, but the blockage happens after a
> use as an instruction input, and there's no place to
> split before that.
>
> BUG=v8:5888
>
> Review-Url: https://codereview.chromium.org/2652153005
> Cr-Commit-Position: refs/heads/master@{#42706}
> Committed: ca779b29a6TBR=bmeurer@chromium.org,jarin@chromium.org,mtrofin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5888
Review-Url: https://codereview.chromium.org/2654993007
Cr-Commit-Position: refs/heads/master@{#42707}
This corrects the case when we need to allocate a
blocked register, but the blockage happens after a
use as an instruction input, and there's no place to
split before that.
BUG=v8:5888
Review-Url: https://codereview.chromium.org/2652153005
Cr-Commit-Position: refs/heads/master@{#42706}
The mentioned asserts did not work properly with interpreted and turbofanned functions.
To fix this issue %GetOptimizationStatus() now returns a set of flags instead of a single value.
This CL also adds more helper functions to mjsunit, like isNeverOptimize(), isAlwaysOptimize(),
isOptimized(fun), etc.
BUG=v8:5890
Review-Url: https://codereview.chromium.org/2654733004
Cr-Commit-Position: refs/heads/master@{#42703}
This makes sure that static guarantees about object maps are not used
accross operations on the effect chain that might trigger a map change.
Such operations are missing the {Operator::kNoWrite} property.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-685506
BUG=chromium:685506
Review-Url: https://codereview.chromium.org/2653273004
Cr-Commit-Position: refs/heads/master@{#42697}
This makes sure that the deoptimizer preserves the exact bit pattern of
floating-point values (both 32-bit and 64-bit) up to the point where a
potential {HeapNumber} is allocated. It in turn allows us to correctly
recognize the {hole_nan_value} when stored into a {FixedDouleArray}.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-684208
BUG=chromium:684208
Review-Url: https://codereview.chromium.org/2652303002
Cr-Commit-Position: refs/heads/master@{#42679}
Enable enqueueing of eager inner function compilation onto the compiler
dispatcher. This enables these tasks to be performed in parallel to
compilation of the outer functio (only for Ignition functions).
We currently synchronize to ensure all inner function compilations
are complete before executing the outer function - future work will
allow outer function execution to happenin parallel to inner function
compilation.
BUG=v8:5203,v8:5215
Review-Url: https://codereview.chromium.org/2611313002
Cr-Commit-Position: refs/heads/master@{#42667}
We did not smi-check the spread argument here, meaning we tried to take the map
of a smi, resulting in segfaults which clusterfuzz found.
Also added tests that exercise this path.
BUG=685086
Review-Url: https://codereview.chromium.org/2655013002
Cr-Commit-Position: refs/heads/master@{#42657}
This fixes the checks of accumulator usage flags in the computation of
the interpreter register liveness during bytecode analysis. The usage
flags at hand are bit patterns as opposed to flat enum values. Use the
safe accessors instead of plain comparison.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-683581
BUG=chromium:683581
Review-Url: https://codereview.chromium.org/2651653005
Cr-Commit-Position: refs/heads/master@{#42648}
Array.prototype.concat does not properly handle JSProxy species that will
modify the currently visited array.
BUG=682194
Review-Url: https://codereview.chromium.org/2655623004
Cr-Commit-Position: refs/heads/master@{#42640}
This makes sure 32-bit constants that are used as {MachineType::Uint32}
by the deoptimization translation are also interpreted as such when the
literals are collected.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-681983
BUG=chromium:681983
Review-Url: https://codereview.chromium.org/2646463002
Cr-Commit-Position: refs/heads/master@{#42493}
The IA32AddPair and IA32SubPair instructions were using an input register as a
temporary value, which led to registers sometimes being clobbered when they
shouldn't have been. This led to problems, for example, in calling printf to
format doubles:
printf("%f", 1.2345) => 0.61725 (on x86)
BUG= https://bugs.chromium.org/p/v8/issues/detail?id=5800
Review-Url: https://codereview.chromium.org/2637583002
Cr-Commit-Position: refs/heads/master@{#42486}
This also introduces exhaustive switch-cases for instance types.
BUG=chromium:681383
Review-Url: https://codereview.chromium.org/2646433002
Cr-Commit-Position: refs/heads/master@{#42447}
Non-capturing groups so far did not have any effect, so we elided
them in the regexp parser. However, they do affect how lookarounds
are parsed: in unicode mode, lookarounds are not quantifiable. They
are however if wrapped in a group.
BUG=v8:5845
Review-Url: https://codereview.chromium.org/2636883002
Cr-Commit-Position: refs/heads/master@{#42436}
- Currently WebAssembly.Memory.grow() assumes that it always has an instance associated with it,
fix to grow and reflect new size when no instance is associated with memory object.
- Correctness fixes for the js api, throw range errors instead of generic errors
BUG=chromium:680938
R=bradnelson@chromium.org, titzer@chromium.org
Review-Url: https://codereview.chromium.org/2638243002
Cr-Commit-Position: refs/heads/master@{#42432}
Enable enqueueing of eager inner function compilation onto the compiler
dispatcher. This enables these tasks to be performed in parallel to
compilation of the outer functio (only for Ignition functions).
We currently synchronize to ensure all inner function compilations
are complete before executing the outer function - future work will
allow outer function execution to happenin parallel to inner function
compilation.
BUG=v8:5203,v8:5215
Review-Url: https://codereview.chromium.org/2611313002
Cr-Commit-Position: refs/heads/master@{#42413}
The resume trampolin used to call the generator function with the context of the
last suspension rather than the closure's context. While that was fine for
Ignition, Turbofan got utterly confused. With this CL, the resume trampolin
always passes in the closure's context (like in the very first call of the
generator function). The generator function itself then restores its previously
current context by reading it from the generator object and doing a
PushContext.
BUG=chromium:681171
Review-Url: https://codereview.chromium.org/2639533002
Cr-Commit-Position: refs/heads/master@{#42407}
The bug was caused by AstTraversalVisitor refactoring:
https://codereview.chromium.org/2169833002/
InitializerRewriter::VisitRewritableExpression in parser.cc didn't recurse; so
it fails when a rewritable expression contains another rewritable expression.
See the bug for more details.
BUG=chromium:679727
Review-Url: https://codereview.chromium.org/2629623002
Cr-Commit-Position: refs/heads/master@{#42274}
Lower StoreDataPropertyInLiteral() when storing
computed property names in object literals.
Add a new AccessMode, kStoreInLiteral. It is similar to
AccessMode::kStore but does not look
up properties on the prototype chain.
99% of all literal definitions with computed property names
end up with generic access_info because of how we count
properties. Once we fix
https://bugs.chromium.org/p/v8/issues/detail?id=5625,
they'll get lowered as well.
BUG=v8:5624
Review-Url: https://codereview.chromium.org/2619773002
Cr-Commit-Position: refs/heads/master@{#42210}
Previously, the Intl implementation tracked types two ways:
- In the intl_initialized_marker_symbol
- In various named properties of the intl_impl_object_symbol value
As far as I can tell, these will never disagree with each other,
modulo bugs in Intl itself. This patch removes the second type
checking system.
This reland includes a fixed type check for
Intl.DateTimeFormat.prototype.formatToParts , which is the only Intl
method which is not bound. All future methods will follow this
pattern.
The second reland ensures that a newly inserted test is only run
if Intl is present.
BUG=v8:5751,chromium:677055, v8:4962
CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_noi18n_rel_ng
TBR=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2623683002
Cr-Commit-Position: refs/heads/master@{#42152}
We did not associate any position to the stack check in the wasm
function prologue, hence a check failed later when trying to map the
non-existent position to the asm.js source position.
With this CL, we add a mapping to the source position table, mapping
the stack check call to byte offset 0 (which is distinct from any valid
instruction position). Also, we add another entry to the asm.js source
position sidetable, mapping byte offset 0 to the start source position
of the function body.
R=titzer@chromium.org, ahaas@chromium.org
BUG=chromium:677685
Review-Url: https://codereview.chromium.org/2609363004
Cr-Commit-Position: refs/heads/master@{#42130}
Don't assume that the prototype of an object is always a JSObject when
inlining the known receiver map case for abstract relational comparison.
BUG=chromium:679202
R=ishell@chromium.org
Review-Url: https://codereview.chromium.org/2621583002
Cr-Commit-Position: refs/heads/master@{#42123}
Reason for revert:
Breaks noi18n.
Original issue's description:
> [intl] Remove redundant type checking system
>
> Previously, the Intl implementation tracked types two ways:
> - In the intl_initialized_marker_symbol
> - In various named properties of the intl_impl_object_symbol value
>
> As far as I can tell, these will never disagree with each other,
> modulo bugs in Intl itself. This patch removes the second type
> checking system.
>
> This reland includes a fixed type check for
> Intl.DateTimeFormat.prototype.formatToParts , which is the only Intl
> method which is not bound. All future methods will follow this
> pattern.
>
> BUG=v8:5751,chromium:677055, v8:4962
> CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_noi18n_rel_ng
>
> Review-Url: https://codereview.chromium.org/2600913002
> Cr-Commit-Position: refs/heads/master@{#42118}
> Committed: aa8a2d2789TBR=yangguo@chromium.org,adamk@chromium.org,littledan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5751,chromium:677055, v8:4962
Review-Url: https://codereview.chromium.org/2617323002
Cr-Commit-Position: refs/heads/master@{#42119}
Previously, the Intl implementation tracked types two ways:
- In the intl_initialized_marker_symbol
- In various named properties of the intl_impl_object_symbol value
As far as I can tell, these will never disagree with each other,
modulo bugs in Intl itself. This patch removes the second type
checking system.
This reland includes a fixed type check for
Intl.DateTimeFormat.prototype.formatToParts , which is the only Intl
method which is not bound. All future methods will follow this
pattern.
BUG=v8:5751,chromium:677055, v8:4962
CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_noi18n_rel_ng
Review-Url: https://codereview.chromium.org/2600913002
Cr-Commit-Position: refs/heads/master@{#42118}
We need to check both sides for abstract equality of receivers in optimized
code, otherwise we don't handle implicit conversions and undetectable
objects correctly.
R=jarin@chromium.org
BUG=v8:5802
Review-Url: https://codereview.chromium.org/2612213002
Cr-Commit-Position: refs/heads/master@{#42085}
When Crankshaft compiles a keyed load to arguments, it disabled
optimization unless the KEYED_LOAD_IC for the access was monomorphic.
But that's too restrictive, since it will also disable optimization
for this function when the access is on a path that was never executed
so far.
This was spotted in the Node.js core function EventEmitter.prototype.emit,
which was no longer optimizable with Crankshaft using latest V8.
R=jarin@chromium.org
BUG=v8:5790
Review-Url: https://codereview.chromium.org/2607303002
Cr-Commit-Position: refs/heads/master@{#42005}
The TF version of this operation was missing a ToObject coercion, so failed to do
@@toStringTag lookups when passed primitive values.
R=franzih@chromium.org
BUG=v8:5780
Review-Url: https://codereview.chromium.org/2597323002
Cr-Commit-Position: refs/heads/master@{#41961}
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}
In certain corner-cases we would grow a FAST_ELEMENTS packed backing store of a
JS_ARGUMENTS_TYPE object without converting to holey elements kinds. As a side
effect you could then read out the_hole.
BUG=v8:5772
Review-Url: https://codereview.chromium.org/2597013004
Cr-Commit-Position: refs/heads/master@{#41921}
eval() may introduce a scope which needs to be represented as a context at
runtime, e.g.,
eval('var x; let y; ()=>y')
introduces a variable y which needs to have a context allocated for it. However,
when traversing upwards to find the declaration context for a variable which leaks,
as the declaration of x does above, this context has to be understood to not be
a declaration context in sloppy mode.
This patch makes that distinction by introducing a different map for eval-introduced
contexts. A dynamic search for the appropriate context will continue past an eval
context to find the appropriate context. Marking contexts as eval contexts rather
than function contexts required updates in each compiler backend.
BUG=v8:5295, chromium:648719
Review-Url: https://codereview.chromium.org/2435023002
Cr-Commit-Position: refs/heads/master@{#41869}
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}
The scenario here: the asm function fails asm validation,
so we emit a message. In doing so, we create a JSValue wrapper for
the script object that we cache on the script object. This wrapper
is context-dependent and causes the code serializer to choke.
R=mtrofin@chromium.org, titzer@chromium.org
BUG=chromium:674446,chromium:673321
Review-Url: https://codereview.chromium.org/2586943003
Cr-Commit-Position: refs/heads/master@{#41794}
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}
When mark-shared-funtion-for-tier-up is enabled, a function could be marked for
optimization, then the baseline (FCG) code is flushed by the GC. The next time
the function is executed, we shouldn't optimize the code if there isn't
baseline code.
BUG=chromium:673242
Review-Url: https://codereview.chromium.org/2575333003
Cr-Commit-Position: refs/heads/master@{#41751}
If the eval contains a let, we need to know whether an inner function
refers to the variable to be able to decide its context allocation
status.
The added test needs https://codereview.chromium.org/2435023002/ too
in order to pass.
BUG=v8:5736
Review-Url: https://codereview.chromium.org/2574753002
Cr-Commit-Position: refs/heads/master@{#41723}
This fixes a corner case where the {FastCloneShallowArrayStub} was used
for literals that are backed by a double backing store and would exceed
limits for new-space allocations on 32-bit architectures. The stub in
question does not support such literals, callers must use the runtime.
Note that this fix is for Ignition as well as FullCodeGenerator.
R=rmcilroy@chromium.org
TEST=mjsunit/regress/regress-crbug-672792
BUG=chromium:672792
Review-Url: https://codereview.chromium.org/2570843002
Cr-Commit-Position: refs/heads/master@{#41713}
Determine if the scope of the function to be serialized includes asm-
wasm, and if so, bypass serialization, since we do not support it in
that scenario.
In this change, we do so regardless of whether the asm-wasm path was
successful. This is so we keep the design simple, since the guidance
to developers, moving forward, is to use wasm.
BUG=643595
Review-Url: https://codereview.chromium.org/2573193002
Cr-Commit-Position: refs/heads/master@{#41704}
The least two bits of the owner field of a Page are used to determine
whether the Page is part of a large object. If these bits are not equal
to 0x11, the page is part of a large object and needs special handling
e.g. in MemoryChunk::FromAnyPointerAddress to determine which chunk it
belongs to.
This CL fixes an issue in which the store buffer overflows after
a large object space allocation but before the object has been fully
initialized. Store buffer overflow handling attempts to look up the
chunk of a page, but fails to do so correctly since the page's owner
field has not yet been initialized.
This CL ensures that the owner field of all pages belonging to a large
object allocation are initialized to a value that is interpreted
correctly.
BUG=chromium:672041
Committed: https://crrev.com/9b6808bfb5366beebe3af30a06f9851edb2039d4
Review-Url: https://codereview.chromium.org/2565713002
Cr-Original-Commit-Position: refs/heads/master@{#41641}
Cr-Commit-Position: refs/heads/master@{#41687}
Debug mirrors will no longer be supported in the near future.
It will now only be tested by being used by the v8-inspector.
R=jgruber@chromium.org
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2566103002
Cr-Commit-Position: refs/heads/master@{#41686}
The fast-path for dynamic local variables was previously checking the
lookup variable rather than the shadowed variable when deciding whether
to add a hole check.
BUG=669540
Review-Url: https://codereview.chromium.org/2551023004
Cr-Commit-Position: refs/heads/master@{#41677}
Reason for revert:
Tree closer: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/12409
Original issue's description:
> [heap] Initialize the owner on each page after lospace allocation
>
> The least two bits of the owner field of a Page are used to determine
> whether the Page is part of a large object. If these bits are not equal
> to 0x11, the page is part of a large object and needs special handling
> e.g. in MemoryChunk::FromAnyPointerAddress to determine which chunk it
> belongs to.
>
> This CL fixes an issue in which the store buffer overflows after
> a large object space allocation but before the object has been fully
> initialized. Store buffer overflow handling attempts to look up the
> chunk of a page, but fails to do so correctly since the page's owner
> field has not yet been initialized.
>
> This CL ensures that the owner field of all pages belonging to a large
> object allocation are initialized to a value that is interpreted
> correctly.
>
> BUG=chromium:672041
>
> Committed: https://crrev.com/9b6808bfb5366beebe3af30a06f9851edb2039d4
> Cr-Commit-Position: refs/heads/master@{#41641}
TBR=mlippautz@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:672041
Review-Url: https://codereview.chromium.org/2562273004
Cr-Commit-Position: refs/heads/master@{#41644}
The least two bits of the owner field of a Page are used to determine
whether the Page is part of a large object. If these bits are not equal
to 0x11, the page is part of a large object and needs special handling
e.g. in MemoryChunk::FromAnyPointerAddress to determine which chunk it
belongs to.
This CL fixes an issue in which the store buffer overflows after
a large object space allocation but before the object has been fully
initialized. Store buffer overflow handling attempts to look up the
chunk of a page, but fails to do so correctly since the page's owner
field has not yet been initialized.
This CL ensures that the owner field of all pages belonging to a large
object allocation are initialized to a value that is interpreted
correctly.
BUG=chromium:672041
Review-Url: https://codereview.chromium.org/2565713002
Cr-Commit-Position: refs/heads/master@{#41641}
By now the predicate in question is an exact negation of %IsAsmWasmCode
as the name intuitively implies. The need for two separate test methods
no longer exists and one of the two can be removed.
R=bradnelson@chromium.org
Review-Url: https://codereview.chromium.org/2562003002
Cr-Commit-Position: refs/heads/master@{#41616}
Passing kAllowLargeObjectAllocation now allocates in LOS if necessary.
Allow such allocations when growing fixed arrays in RegExp's @@match
and @@split operations.
BUG=chromium:670671
Review-Url: https://codereview.chromium.org/2555703003
Cr-Commit-Position: refs/heads/master@{#41526}
Incooperate suggestion from adamk@ to only sent lexical variables to
I+TF that require explicit initialization, i.e. don't send named
function expressions to I+TF. This should recover most of the regression
now.
Also introduce a regression test for the original let issue.
BUG=chromium:670691,v8:5666
R=adamk@chromium.org,yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2556663002
Cr-Commit-Position: refs/heads/master@{#41507}
This avoids the crash which ClusterFuzz found, but still does not
report the same position as without validate.asm.
For calls like "foo()|0", we report the position of the call instead of
the position of the "|" if ToNumber throws an error.
After this CL, the correctness-fuzzer for validate-asm will probably
find mismatches there.
R=titzer@chromium.org
BUG=chromium:670808
Review-Url: https://codereview.chromium.org/2548323002
Cr-Commit-Position: refs/heads/master@{#41500}
This enables {FLAG_debug_code} by default in debug builds. The advantage
is that generated code contained within the snapshot will contain such
debug code. Before we would only get coverage for these pieces with the
no-snapshot builds, which have a meager coverage. One can still pass the
inverse --no-debug-code flag to ensure generated code remains readable
within debug builds as well.
R=machenbach@chromium.org
Review-Url: https://codereview.chromium.org/2528913002
Cr-Commit-Position: refs/heads/master@{#41451}
This fixes the existing workaround in {BytecodeGraphBuilder} where the
number of elements in an array literal is unknown just from the bytecode
alone and needs to be deduced from the constant elements.
Note that this is just a quick fix to prevent calling the fast-clone
stub for boilerplates that are too big to fit on a regular page. In the
long run we need something more solid here.
R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-crbug-669850
BUG=chromium:669850
Review-Url: https://codereview.chromium.org/2542633002
Cr-Commit-Position: refs/heads/master@{#41420}
The EscapeStatusAnalysis didn't know anything about the simplified
operator ConvertTaggedHoleToUndefined, thus leading to a crash. We
now just handled it by pretending that any allocation that goes into
such a node escapes.
BUG=chromium:669451
R=tebbi@chromium.org
Review-Url: https://codereview.chromium.org/2533263002
Cr-Commit-Position: refs/heads/master@{#41359}
This ensures the deoptimization triggered due to materialization of
objects by the {TranslatedState} works in conjunction with OSR. The
optimized code used for OSR is not installed on the function, hence
needs to be specified explicitly when requesting deoptimization for
specific stack frames.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-668795
BUG=chromium:668795
Review-Url: https://codereview.chromium.org/2534143002
Cr-Commit-Position: refs/heads/master@{#41348}
Up until now assertThrows allows to check the type field of an
exception, which is, however, a custom field introduced in a single
regression test. With the change assertThrows allows to check the
message field of an exception, which is set for standard V8 exceptions
by default.
I use the new assertThrows to refactor test/mjsunit/wasm/divrem-trap.js
R=titzer@chromium.org
Review-Url: https://codereview.chromium.org/2525313003
Cr-Commit-Position: refs/heads/master@{#41302}
A missing @@IsConcatSpreadable check caused the fast path inside the slow path
to be incorrect and follow the default concat strategy when the arguments
arrays contain only doubles.
BUG=chromium:668414
Review-Url: https://codereview.chromium.org/2527173002
Cr-Commit-Position: refs/heads/master@{#41301}
For dictionary-mode receivers, the KeyedStoreGeneric stub can store
properties directly in most cases. Doing so avoids the need to have
an entry in the stub cache for every map/property combination.
Original review: https://codereview.chromium.org/2504403005/
Review-Url: https://codereview.chromium.org/2528883003
Cr-Commit-Position: refs/heads/master@{#41272}
For dictionary-mode receivers, the KeyedStoreGeneric stub can store
properties directly in most cases. Doing so avoids the need to have
an entry in the stub cache for every map/property combination.
Original review: https://codereview.chromium.org/2504403005/
Review-Url: https://codereview.chromium.org/2524943002
Cr-Commit-Position: refs/heads/master@{#41218}
Previous fuzzer fix broke the case when the pending assessment came from the same
block. In that case, the assessments table does not have an entry yet for the block,
because we register only when we're done processing a block.
BUG=667745
Review-Url: https://codereview.chromium.org/2519973004
Cr-Commit-Position: refs/heads/master@{#41193}
* Fix setting script-scope variables through inspector by internalizing
their names.
* Reconstruct values of Number, String, and Boolean classes.
* Adapt a couple of tests for API restrictions.
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2512963002
Cr-Commit-Position: refs/heads/master@{#41175}
This fixes stack unwinding to always recompute the stack pointer for
interpreted frames. For frames materialized by the deoptimizer we elide
the handler frame in between, hence arguments being pushed on the stack
will no longer be pushed into the handler frame but into the interpreted
frame directly.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-662830
BUG=chromium:662830
Review-Url: https://codereview.chromium.org/2517203003
Cr-Commit-Position: refs/heads/master@{#41170}
The verifier needs to use the block and assessments in that block corresponding to
a predecessor of a "pending" assessment. Not doing that causes incorrect
assessments when 2 locations are swapped.
BUG=665402
Review-Url: https://codereview.chromium.org/2515803002
Cr-Commit-Position: refs/heads/master@{#41159}
Adapted various tests to restrictions of inspector protocol:
* osr-typing-debug-change: Don't set function variable value.
* debug-evaluate-locals: Add variable introduced by eval, run typeof
inside evaluate().
* regress-419663: Don't set duplicate breakpoints.
* regress-crbug-465298: Compare against function name instead of value.
* regress-crbug-621361: Make evaluate return string results.
* debug-script: Various counts were off due to new way tests are called.
Added new inspector script type.
Breakpoints now contain the actual break position, and remote object
reconstruction has been extended a bit.
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2505363002
Cr-Commit-Position: refs/heads/master@{#41129}
The code which pushes and pops to the function name inference stack
generally checks if the stack is active with the IsOpen method. One
piece of code pertaining to async functions was missing that check.
This patch adds it.
BUG=chromium:658267
R=gsathya,caitp
Review-Url: https://codereview.chromium.org/2514893002
Cr-Commit-Position: refs/heads/master@{#41120}
It originates from the era where we used to run a separate preparse step
before parsing and store the function data. Now the usage of preparser
is something completely different, so this flag doesn't make sense any
more.
In addition, this way we get more test coverage for preparser (for small
scripts).
BUG=
Review-Url: https://codereview.chromium.org/2513563002
Cr-Commit-Position: refs/heads/master@{#41110}
This adds clearAllBreakPoints functionality (which requires tracking set
breakpoints internally), and several script-related functions that rely
on runtime functions.
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2508853003
Cr-Commit-Position: refs/heads/master@{#41064}
This adds access to the LiveEdit API object, frame.restart(), and
various breakpoint setters. The LiveEdit API still depends on the JS
debugging context and blocks its removal; but it should be removed
once LiveEdit is rewritten in the midterm.
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2503293002
Cr-Commit-Position: refs/heads/master@{#41062}
The operator in question is guaranteed to produce a tagged value that is
not equal to the-hole, it however does not guarantee the value to be a
HeapObject. The correct representation hence is {kTagged}.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-665587
BUG=chromium:665587
Review-Url: https://codereview.chromium.org/2504183002
Cr-Commit-Position: refs/heads/master@{#41032}
The reason is that non-configurability still allows a writable property to become read-only.
BUG=chromium:663750
Review-Url: https://codereview.chromium.org/2508873002
Cr-Commit-Position: refs/heads/master@{#41029}
This CL further extends the debug wrapper, migrates around 60 tests, and
removes a few tests that use functionality we will not support anymore.
In more detail:
* Removed tests that use:
* enable/disable individual breakpoints
* invocationText()
* the ScriptCollected event
* showBreakPoints
* evalFromScript (and similar)
* mirror.constructedBy and mirror.referencedBy
* event_data.promise()
* Some frame.evaluate uses were adapted since due to differences between
remote objects (inspector) and mirrors. For instance, exceptions are
currently not recreated exactly, since the inspector protocol does not
give us the stack and message separately. Other objects (such as
'this' in debug-evaluate-receiver-before-super) need to be explicitly
converted to a string before the test works correctly.
* Ensure that inspector stores the script before sending ScriptParsed and
ScriptFailedToParse events in order to be able to use the script from
within those events.
* Better remote object reconstruction (e.g. for undefined and arrays).
* New functionality in wrapper:
* debuggerFlags().breakPointsActive.setValue()
* scripts()
* execState.setVariableValue()
* execState.scopeObject().value()
* execState.scopeObject().property()
* execState.frame().allScopes()
* eventData.exception()
* eventData.script()
* setBreakPointsActive()
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2497973002
Cr-Commit-Position: refs/heads/master@{#41019}
This fixes the bogus {Word32Equal} comparison in the ToString builtin
implementing Object.prototype.toString to be a pointer-size {WordEqual}
comparison instead. Comparing just the lower half-word is insufficient
on 64-bit architectures.
R=jgruber@chromium.org
TEST=mjsunit/regress/regress-crbug-664506
BUG=chromium:664506
Review-Url: https://codereview.chromium.org/2496043003
Cr-Commit-Position: refs/heads/master@{#40963}
A SmiUntag() was missing when loading the old backing store's length.
BUG=chromium:664469
Review-Url: https://codereview.chromium.org/2492783004
Cr-Commit-Position: refs/heads/master@{#40921}
This CL adds support for:
* conditional breaks in setBreakpoint,
* locals in frame.local{Count,Name,Value},
* evaluation on a frame in frame.evaluate,
* and more detailed scope information in scopeObject.
Uses of several functions that are not covered by the
inspector protocol and are only used in tests have been removed.
Local handling has been modified to also include arguments as locals.
Inspector differs in this regard from our FrameDetails in that
arguments are always shown as locals. Argument-related functions
were removed.
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2491543002
Cr-Commit-Position: refs/heads/master@{#40917}
This changes {FrameState} nodes modeling "after" states to use bytecode
offsets pointing to the deoptimizing bytecode. This is in sync with the
normal execution, as the bytecode offset is advanced after operations
complete in regular bytecode handlers.
The change is necessary to ensure lazy deoptimized frames contain an
accurate bytecode offset while they are on the stack. Such frames can be
inspected by various stack walks. The continuation builtin will advance
the bytecode offset upon return.
R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-660379
BUG=chromium:660379
Review-Url: https://codereview.chromium.org/2487173002
Cr-Commit-Position: refs/heads/master@{#40887}
If an exception is thrown when there is a Promise being created, the Promise
catch prediction code would call into a part implemented in JavaScript to see if
the Promise has a catch handler. If it is not possible to call back into JS,
e.g., due to a stack overflow, then this would lead to a crash. This patch
"speculates" that, if it's impossible to call back into JavaScript, then the
error is unhandled, avoding the issue. In a future patch, the catch prediction
logic should be entirely written in C++, but this patch adds a minimal fix to
be more friendly to backports.
BUG=chromium:662935
R=jgruber
Review-Url: https://codereview.chromium.org/2487833002
Cr-Commit-Position: refs/heads/master@{#40851}
Don't rely on carry flags you didn't set yourself.
BUG=chromium:663402
Review-Url: https://codereview.chromium.org/2484283002
Cr-Commit-Position: refs/heads/master@{#40848}
This adds clearStepping plus the family of
{set,clear}BreakOn{,Uncaught}Exception functions.
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2482903002
Cr-Commit-Position: refs/heads/master@{#40834}
We really should deopt before the for-in index increment.
BUG=chromium:662904
Review-Url: https://codereview.chromium.org/2476423003
Cr-Commit-Position: refs/heads/master@{#40828}
This moves all tests currently working with the inspector debugger wrapper to
test/debugger.
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2480223002
Cr-Commit-Position: refs/heads/master@{#40824}
- When module bytes have a memory maximum defined, compiled module object should set maximum memory
- Exported memory objects should set maximum value on the memory objects
- Update tests to use declared maximum values.
R=ahaas@chromium.org
Review-Url: https://codereview.chromium.org/2474333003
Cr-Commit-Position: refs/heads/master@{#40820}
Note: This CL might regress code that relies on such arguments access.
In that case, we could still optimize the access if it accesses at
constant index (and the argument at that index is not context-allocated).
If any code relies on a general access to context-allocated arguments,
we would need to analyze the function for assignment to the arguments - this
might be quite tricky.
BUG=chromium:662845
Review-Url: https://codereview.chromium.org/2484723002
Cr-Commit-Position: refs/heads/master@{#40813}
The revert somehow lost the contents of regress-2825.js.
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
BUG=chromium:662928
Review URL: https://codereview.chromium.org/2483863002 .
Cr-Commit-Position: refs/heads/master@{#40806}
This moves all tests currently working with the inspector debugger wrapper to
test/debugger.
BUG=v8:5530
Review-Url: https://codereview.chromium.org/2480223002
Cr-Commit-Position: refs/heads/master@{#40804}
We need to rename the receiver on CheckHeapObject, because we
don't canonicalize numbers in SignedSmall range, and thus we
the representation selection can hand out TaggedSigned values
for receiver uses, even though we checked for TaggedPointerness
first.
Note that this is rather hacky and just intended to fix the bug
ASAP. We need to think about how to deal with representations in
earlier compilation stages.
BUG=chromium:662410
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2485563002
Cr-Commit-Position: refs/heads/master@{#40792}
This disables the usage of the {maybe_assigned} flag that the variable
resolution computes for each variable on non-asm.js code. Note that the
analysis is fundamentally broken for destructuring and top-level lexical
variables. Also note that this still uses the analysis for asm.js code
even though it is not validated. One can still trigger the bug by using
invalid constructs within a function marked with "use asm". The fix is
intentionally minimal so that it can be merged to release branches.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-659915
BUG=chromium:659915
Review-Url: https://codereview.chromium.org/2471523005
Cr-Commit-Position: refs/heads/master@{#40716}
This turns the ZoneList with minimum 6 words overhead into a linked list through variables, using 2 words for the empty list. Additionally the average number of pointers per entry goes down to the optimal 1 per variable that's in a list.
This does introduce 1 pointer unnecessary overhead for dynamic variables. If that becomes a problem we could distinguish between variables in lists and variables not in lists. We can distinguish them at construction-time.
BUG=v8:5209
Review-Url: https://codereview.chromium.org/2475433002
Cr-Commit-Position: refs/heads/master@{#40714}
Conflicting type feedback on Load/StoreICs can lead to out-of-bounds
field access, which is essentially dead code, but EscapeAnalysis was
confused about those. For now, mark the objects as escaping in these
cases, middle-term we want to deal better with this kind of compile-
time known dead code.
BUG=chromium:658185,v8:4586
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2459273002
Cr-Commit-Position: refs/heads/master@{#40662}
This flag is on by default for now. Whenever heuristics in the compiler
pipeline decide to use Ignition+TurboFan, then {BytecodeGraphBuilder} is
active. Removing the flag reduces maintenance overhead.
R=mvstanton@chromium.org
Review-Url: https://codereview.chromium.org/2437103002
Cr-Commit-Position: refs/heads/master@{#40639}
For global object property cells, we did not check that the map on the
previous object is still the same for which we actually optimized. So
the optimized code was not in sync with the actual state of the property
cell. When loading from such a global object property cell, Crankshaft
optimizes away any map checks (based on the stable map assumption),
leading to arbitrary memory access in the worst case.
TurboFan has the same bug for stores, but is safe on loads because we
do appropriate map checks there. However mixing TurboFan and Crankshaft
still exposes the bug.
R=yangguo@chromium.org
BUG=chromium:659475
Review-Url: https://codereview.chromium.org/2444233004
Cr-Commit-Position: refs/heads/master@{#40592}
The TurboFan backends currently don't support tail-calls to CPP builtins
because the semantics of kJavaScriptCallArgCountRegister has different
semantics for stub call descriptors versus JavaScript call descriptors.
This is actually a short-coming of the backends and follow-up work will
make the backends more robust in that regard to fail hard on unsupported
constructs like that. This just disables the lowering creating such a
tail-call.
R=bmeurer@chromium.org
BUG=chromium:658691
TEST=mjsunit/regress/regress-crbug-658691
Review-Url: https://codereview.chromium.org/2447383002
Cr-Commit-Position: refs/heads/master@{#40590}
Reason for revert:
Breaks tree: http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/8789
Original issue's description:
> [compiler] Properly validate stable map assumption for globals.
>
> For global object property cells, we did not check that the map on the
> previous object is still the same for which we actually optimized. So
> the optimized code was not in sync with the actual state of the property
> cell. When loading from such a global object property cell, Crankshaft
> optimizes away any map checks (based on the stable map assumption),
> leading to arbitrary memory access in the worst case.
>
> TurboFan has the same bug for stores, but is safe on loads because we
> do appropriate map checks there. However mixing TurboFan and Crankshaft
> still exposes the bug.
>
> R=yangguo@chromium.org
> BUG=chromium:659475
TBR=yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:659475
Review-Url: https://codereview.chromium.org/2454513003
Cr-Commit-Position: refs/heads/master@{#40582}
For global object property cells, we did not check that the map on the
previous object is still the same for which we actually optimized. So
the optimized code was not in sync with the actual state of the property
cell. When loading from such a global object property cell, Crankshaft
optimizes away any map checks (based on the stable map assumption),
leading to arbitrary memory access in the worst case.
TurboFan has the same bug for stores, but is safe on loads because we
do appropriate map checks there. However mixing TurboFan and Crankshaft
still exposes the bug.
R=yangguo@chromium.org
BUG=chromium:659475
Review-Url: https://codereview.chromium.org/2444233004
Cr-Commit-Position: refs/heads/master@{#40578}
This brings the BytecodeGenerator in line with FullCodeGenerator, now that
more requests for hole checks are flowing through BuildVariableAssignment.
BUG=chromium:658528
Review-Url: https://codereview.chromium.org/2447783002
Cr-Commit-Position: refs/heads/master@{#40557}
Object.create(null) is most likely to be used for dictionary-like objects.
Hence it would be beneficial to directly create a slow-mode object and avoid
additional overhead later-on.
BUG=
Review-Url: https://codereview.chromium.org/2430273007
Cr-Commit-Position: refs/heads/master@{#40551}
This CL removes code that is now unused since the port of regexp.js has been
completed. Removed functions / classes are:
* regexp.js (GetSubstitution moved to string.js)
* RegExpConstructResult stub
* RegExpFlags intrinsic
* RegExpSource intrinsic
* RegExpInitializeAndCompile runtime function
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2448463002
Cr-Commit-Position: refs/heads/master@{#40547}
CL https://codereview.chromium.org/2177273002 changed FastNewFunctionContextStub
to take a number of slots parameter and in-doing so removed the maximum slot
count for FastNewFunctionContextStub. This made it possible to create a
closure which is larger than kMaxRegularHeapObjectSize and so can't be
allocated by FastNewFunctionContextStub.
Reintroduce FastNewFunctionContextStub::kMaxSlots (but make the limit much
larger) to ensure we call the runtime for contexts which need to be
allocated in the LO space.
BUG=chromium:655573
Review-Url: https://codereview.chromium.org/2445703002
Cr-Commit-Position: refs/heads/master@{#40541}
