- RegExp.prototype.toString() doesn't have any special handling of
RegExp instances and simply calls the source and flags getters
- Use the original values of global and sticky, rather than based
on the current flag getters, as specified in
https://github.com/tc39/ecma262/pull/494R=yangguo@chromium.org,adamk
LOG=Y
BUG=v8:4602
Review URL: https://codereview.chromium.org/1846303002
Cr-Commit-Position: refs/heads/master@{#35225}
Reason for revert:
TC39 decided that this compatibility fix should be standardized.
Original issue's description:
> Remove RegExp.prototype.source getter compat workaround
>
> The getter RegExp.prototype.source is specified in ES2015 to throw when
> called on a non-RegExp instance, such as RegExp.prototype. We had previously
> put in a compatibility workaround for all RegExp getters to make them
> throw on access specifically with RegExp.prototype as the receiver; however,
> we only have evidence that this is needed for properties other than source.
> This patch removes the compatibility workaround for get RegExp.prototype.source
> and gives it semantics precisely as per the ES2015 specification.
>
> R=adamk
> BUG=chromium:581577,v8:4827
> LOG=Y
>
> Committed: https://crrev.com/80803aa89e31839b8f73959776fa7e1923c6b461
> Cr-Commit-Position: refs/heads/master@{#35086}
R=adamk@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:581577,v8:4827
LOG=Y
Review URL: https://codereview.chromium.org/1847783003
Cr-Commit-Position: refs/heads/master@{#35180}
This patch adds fast paths for @@replace and @@split that call into
the old, side-effect free (and faster) versions of those builtin
operations when possible (roughly, when the receiver is a RegExp
and the 'exec' method is untampered). Also add some micro-optimizations
that further improve performance.
Taken altogether, this takes us from a ~70% regression on the Octane
RegExp benchmark to a ~9% regression.
The test262.status lines for RegExps has been reorganized to make it
clearer the status of individual tests. More work will likely be
required to increase spec compliance before the --harmony-regexp-exec
flag is shipped; some of that work is happening on the spec side.
BUG=v8:4602
LOG=y
Review URL: https://codereview.chromium.org/1836123002
Cr-Commit-Position: refs/heads/master@{#35118}
The getter RegExp.prototype.source is specified in ES2015 to throw when
called on a non-RegExp instance, such as RegExp.prototype. We had previously
put in a compatibility workaround for all RegExp getters to make them
throw on access specifically with RegExp.prototype as the receiver; however,
we only have evidence that this is needed for properties other than source.
This patch removes the compatibility workaround for get RegExp.prototype.source
and gives it semantics precisely as per the ES2015 specification.
R=adamk
BUG=chromium:581577,v8:4827
LOG=Y
Review URL: https://codereview.chromium.org/1837843002
Cr-Commit-Position: refs/heads/master@{#35086}
String.prototype.match is specified to call out to the current
value of RegExp.prototype[Symbol.match] when passed a string argument,
rather than the original value. This patch updates the RegExp code
to do that.
R=yangguo@chromium.org
BUG=v8:4602
LOG=Y
Review URL: https://codereview.chromium.org/1821773003
Cr-Commit-Position: refs/heads/master@{#35001}
src/js/regexp.js was one of the few files that was left in sloppy
mode. The ES2017 draft specification requires that writes to
lastIndex throw when the property is non-writable, and test262
tests enforce this behavior. This patch puts that file in strict
mode.
BUG=v8:4504
R=yangguo@chromium.org
LOG=Y
Review URL: https://codereview.chromium.org/1776883005
Cr-Commit-Position: refs/heads/master@{#34801}
test262 "negative" test expectations list which exception is thrown. The ES2017
draft specification is very specific about which exception class is thrown
from which path, and V8 works hard to be correct with respect to that spec.
Previously, the test262 test runner would accept any nonzero status code,
such as from a crash, or a FAIL printed out, for a negative test. This
patch makes negative tests check for the right answer using a quick-and-dirty
parsing of the exception printing from d8 to find the exception class.
It invokes d8 in a way to get a status code of 0 from thrown exceptions
so that 'negative' tests aren't actually implemented by negating the output.
Amazingly, this didn't catch any test262 failures, but I verified the extra
checking interactively by changing a negative test to expect a different type
and saw it fail.
BUG=v8:4803
R=machenbach
LOG=Y
Review URL: https://codereview.chromium.org/1766503002
Cr-Commit-Position: refs/heads/master@{#34763}
This patch removes some [PASS, FAIL_OK] lines which consistently pass,
and it declares some tests to be test bugs as appropriate.
R=adamk
Review URL: https://codereview.chromium.org/1784063002
Cr-Commit-Position: refs/heads/master@{#34733}
- Make separate iterator functions for TypedArrays which do a type check
(and in the future should check for detached TypedArrays)
- Share the toString method with Arrays
BUG=v8:4785
R=adamk
LOG=Y
Review URL: https://codereview.chromium.org/1780113002
Cr-Commit-Position: refs/heads/master@{#34698}
This check is guaranteed by the Promise spec and tested by test262
tests. It only has to run for subclasses. This patch adds the check
to the Promise code.
BUG=v8:4633
R=adamk
LOG=Y
Review URL: https://codereview.chromium.org/1780823003
Cr-Commit-Position: refs/heads/master@{#34693}
This is because compiler.cc is awesome. There are cases where we do not
yet have a SharedFunctionInfo that can tell us whether we are compiling
a generator function, we query the FunctionLiteral instead.
R=rmcilroy@chromium.org
BUG=v8:4681
LOG=n
Review URL: https://codereview.chromium.org/1780193002
Cr-Commit-Position: refs/heads/master@{#34677}
This ensures our optimizing compilers as well as the interpreter are
never tasked with compiling the generator-resuming builtin methods. The
corresponding intrinsics for those methods are not supported and it is
not possible to provide a C++ reference implementation for them. We do
this by assigning builtin function ids to them that we can recognize
during the compiler dispatch.
Note that this also affects the interpreter, because methods having a
builtin function id assigned are not interpreted ({function_data} field
is overlapping). If this ever changes we can still do an early check in
the compiler dispatch (similar to the optimizing compilers) easily.
This applies to the following methods:
- Generator.prototype.next (calls Runtime_GeneratorNext).
- Generator.prototype.return (calls Runtime_GeneratorReturn).
- Generator.prototype.throw (calls Runtime_GeneratorThrow).
R=neis@chromium.org
BUG=v8:4681
LOG=n
Review URL: https://codereview.chromium.org/1779123003
Cr-Commit-Position: refs/heads/master@{#34675}
This ensures the interpreter is not tasked with compiling generator
functions. It currently does not support suspending activations at
yielding points, but we still want to be able to activate it for the
rest of JavaScript in the meantime.
R=rmcilroy@chromium.org
BUG=v8:4681
LOG=n
Review URL: https://codereview.chromium.org/1782013002
Cr-Commit-Position: refs/heads/master@{#34672}
The ES2015 specification requires that String.prototype.startsWith,
String.prototype.endsWith and String.prototype.includes use the IsRegExp
internal algorithm to determine whether to throw a TypeError to prevent
a RegExp from being accidentally cast to a String for those methods.
That internal algorithm checks the presence/truthiness of Symbol.match
to make its determination. This patch switches the builtins to use
this correct test, rather than checking for the [[RegExpMatcher]]
internal slot as the builtins previously did.
R=yangguo
Review URL: https://codereview.chromium.org/1762183002
Cr-Commit-Position: refs/heads/master@{#34547}
The ES2016 draft spec defines a sort of fast path for constructing
a TypedArray based on another TypedArray. This patch implements that
alternative path in TypedArray construction. It is verified by
test262 tests, which now pass. This patch also has a slight cleanup
of TypedArray code by using a macro for TypedArray type checks, as
is done for other types.
This patch includes a minor spec violation: In the same-type case, the
spec indicates that the underlying ArrayBuffer should be copied until
the end, and this is fixed up by making the [[ArrayLength]] shorter.
This is observable with the buffer getter. This patch just copies the
used part of the underlying ArrayBuffer.
R=adamk
BUG=v8:4726
LOG=Y
Review URL: https://codereview.chromium.org/1754593003
Cr-Commit-Position: refs/heads/master@{#34443}
Fixes a bug in the constant pool padding calculation.
BUG=v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1749853002
Cr-Commit-Position: refs/heads/master@{#34403}
This patch fixes %TypedArray%.from to follow the ES2016 draft spec
more precisely. Specifically, the input is first converted to an
ArrayLike, and then afterwards, the mapping function is run and the
results written into the TypedArray. This fixes a test262 test.
R=adamk
LOG=Y
BUG=v8:4782
Review URL: https://codereview.chromium.org/1743463004
Cr-Commit-Position: refs/heads/master@{#34373}
Moves skips to explicit fails and groups errors be failure reason. Almost all failures
are due to lack of generator support.
BUG=v8:4680
LOG=N
TBR=oth@chromium.org
Review URL: https://codereview.chromium.org/1740843003
Cr-Commit-Position: refs/heads/master@{#34334}
Reason for revert:
An Intl change that this depends on breaks a bot
Original issue's description:
> Test262 roll, 2016-2-23
>
> R=adamk
>
> Committed: https://crrev.com/34492040fbfb04fead21416245c8696b9847e751
> Cr-Commit-Position: refs/heads/master@{#34312}
TBR=adamk@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1736223002
Cr-Commit-Position: refs/heads/master@{#34313}
There was a bug in for-of loops without newly declared variables: If,
in performing the assignment, an exception were thrown, then
IteratorClose would not be called. The problem was that the assignment
is done as part of assign_each, which happens before the loop is put
back in the state which is recognized to be breaking/throwing/returning
early.
This patch modifies the for-of desugaring by setting the loop state
before, rather than after, evaluating the assign_each portion, which is
responsible for evaluating the assignment in for-of loops which do not
have a declaration.
This patch, together with https://codereview.chromium.org/1728973002 ,
allow all test262 iterator return-related tests to pass.
R=rossberg
BUG=v8:4776
LOG=Y
Review URL: https://codereview.chromium.org/1731773003
Cr-Commit-Position: refs/heads/master@{#34262}
In the for-of desugaring, IteratorClose is a subtle thing to get right.
When return exists, the logic for which exception to throw is as follows:
1. Get the 'return' property and property any exception that might come from
the property read
2. Call return, not yet propagating an exception if it's thrown.
3. If we are closing the iterator due to an exception, propagate that error.
4. If return threw, propagate that error.
5. Check if return's return value was not an object, and throw if so
Previously, we were effectively doing step 5 even if an exception "had already
been thrown" by step 3. Because this took place in a finally block, the exception
"won the race" and was the one propagated to the user. The fix is a simple change
to the desugaring to do step 5 only if step 3 didn't happen.
R=rossberg
BUG=v8:4775
LOG=Y
Review URL: https://codereview.chromium.org/1728973002
Cr-Commit-Position: refs/heads/master@{#34261}
This patch moves for-of closing to staging. There are a couple of
minor semantics bugs remaining in finalization along edge cases, but
we don't know of any stability issues.
BUG=v8:3566
R=rossberg
LOG=Y
Review URL: https://codereview.chromium.org/1725203002
Cr-Commit-Position: refs/heads/master@{#34254}
Apparently, the tarfile Python module spends a lot of time in
grp.getgrid for retrieving a piece information (the name of the
primary group) which we don't need anyway. There is no
proper way to disable these slow calls, but there's a workaround
which relies on the way in which grp (and pwd) is used.
In fact, pwd and grp are imported in this fashion:
try:
import grp, pwd
except ImportError:
grp = pwd = None
and then used with the following pattern [2]:
if grp:
try:
tarinfo.gname = grp.getgrgid(tarinfo.gid)[0]
except KeyError:
pass
By setting grp and pwd to None, thus skipping the calls, I was
able to achieve a 35x speedup on my workstation.
The user and group names are set to test262 when building the tar.
The downside to this approach is that we are relying on an
implementation detail, which is not in the public API.
However, the blamelist shows that the relevant bits of the module
have not been updated since 2003 [3], so we might as well assume
that the workaround will keep working, on cPython 2.x at least.
---
[1] https://hg.python.org/cpython/file/2.7/Lib/tarfile.py#l56
[2] https://hg.python.org/cpython/file/2.7/Lib/tarfile.py#l1933
[3] https://hg.python.org/cpython/rev/f9a5ed092660
BUG=chromium:535160
LOG=N
Review URL: https://codereview.chromium.org/1727773002
Cr-Commit-Position: refs/heads/master@{#34245}
A recent ES2016 draft spec clarification indicates that, if -0 is
passed into Array.prototype.indexOf or Array.prototype.lastIndexOf
as the starting index, and the result is found at index 0, then +0
rather than -0 should be returned. This patch ensures that V8 has
that result, which is consistent with what some other browsers
return. The patch allows a couple test262 tests to pass.
R=adamk
LOG=Y
Review URL: https://codereview.chromium.org/1729653002
Cr-Commit-Position: refs/heads/master@{#34229}
It turns out that some old polyfill library uses
RegExp.prototype.flags as a way of feature testing. It's not clear
how widespread this is. For now, as a minimal workaround, we can
return undefined from getters like RegExp.prototype.global when
the receiver is RegExp.prototype. This patch implements that strategy
but omits a UseCounter to make backports easier.
R=adamk
CC=yangguo@chromium.org
BUG=chromium:581577
LOG=Y
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1640803003
Cr-Commit-Position: refs/heads/master@{#34201}
The Proxy enumerate trap and Reflect.enumerate are removed from the
ES2016 draft specification. This patch removes the Reflect.enumerate
function, and a follow-on patch will be responsible for the Proxy
trap changes.
R=adamk
LOG=Y
BUG=v8:4768
Review URL: https://codereview.chromium.org/1721453002
Cr-Commit-Position: refs/heads/master@{#34196}
This experimentally implements taring/untaring the test data
for test262 on the v8-side before test isolation and when
running the tests.
It archives on demand only if the tar is outdated compared
to the contained files. This comes with a cost of ~1s extra
to run gyp on linux and ~6s extra on windows. Ninja is
lightning fast afterwards in detecting changes. Also, we
archive only when test_isolation_mode is set and when
the test262_run target is required.
The archiving itself costs ~30s on all platforms. But as the
files will change seldom this shouldn't have a big impact.
Extraction on the test runner side is below 2s on mac and
linux. The speedup is enormous. Around 5 minutes were spent
on download on swarming slaves before, which is now only
a few seconds. So total test time for release (no variants),
e.g. goes from 8 to 3 minutes.
BUG=chromium:535160
LOG=n
Review URL: https://codereview.chromium.org/1713993002
Cr-Commit-Position: refs/heads/master@{#34155}
In ES2015, Date.prototype.toGMTString is simply an alias of
Date.prototype.toUTCString, so it has the same identity as a function and
doesn't have its own name. Firefox has already shipped this behavior.
Previously, we copied JSC behavior by making it a separate function.
This change makes an addition test262 test pass.
BUG=v8:4708
LOG=Y
R=adamk
Review URL: https://codereview.chromium.org/1709373002
Cr-Commit-Position: refs/heads/master@{#34131}
Adds support for ES6 super keyword and performing loads, stores, and
calls to super class members.
Implements SetHomeObject and enables ThisFunctionVariable.
BUG=v8:4280,v8:4682
LOG=N
Review URL: https://codereview.chromium.org/1689573004
Cr-Commit-Position: refs/heads/master@{#33977}
This patch moves Symbol.species support to the "experimental JavaScript
features" flag. While @@species is still a performance hit, it doesn't seem
like it would make the web unusably slow; shipping would still have to
wait on fixing the performance regression, but staging this version should
yield valuable web compatibility information.
R=cbruni
BUG=v8:4093
LOG=Y
Review URL: https://codereview.chromium.org/1678143002
Cr-Commit-Position: refs/heads/master@{#33827}
Adds implementation and tests to support const/let variables in the
interpreter.
BUG=v8:4280,v8:4679
LOG=N
Review URL: https://codereview.chromium.org/1634153002
Cr-Commit-Position: refs/heads/master@{#33819}
