R=verwaest@chromium.org,marja@chromium.org

Review-Url: https://codereview.chromium.org/2351823005
Cr-Commit-Position: refs/heads/master@{#39546}

Removes some unnecessary probing in TemplateHashMapImpl, in
particular probing a second time in LookupOrInsert after the
first probe came up with an empty value.

Review-Url: https://codereview.chromium.org/2349163002
Cr-Commit-Position: refs/heads/master@{#39545}

BUG=

Review-Url: https://codereview.chromium.org/2347073003
Cr-Commit-Position: refs/heads/master@{#39544}

... because the latter automatically respects the desired calling convention.

BUG=v8:5407

Review-Url: https://codereview.chromium.org/2350423002
Cr-Commit-Position: refs/heads/master@{#39543}

BUG=

Review-Url: https://codereview.chromium.org/2357563002
Cr-Commit-Position: refs/heads/master@{#39542}

BUG=chromium:642111

Review-Url: https://codereview.chromium.org/2358523003
Cr-Commit-Position: refs/heads/master@{#39541}

Extract String feedback on Add operation and utilize to lower ConsString
creation in JSTypedLowering when we know that a String addition will
definitely result in the creation of a ConsString.

Note that Crankshaft has to guard the potential length overflow of the
resulting string with an eager deoptimization exit, while we can safely
throw an exception in that case.

Also note that the bytecode pipeline does not currently provide the
String feedback for the addition, which has to be added.

BUG=v8:5267
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2354853002
Cr-Commit-Position: refs/heads/master@{#39540}

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2357573002
Cr-Commit-Position: refs/heads/master@{#39539}

Moves the hashmap's allocator from being a parameter in the various
hashmap functions, to being a field in the hashmap itself. This

1. Protects against incorrectly passed allocators, and
2. Cleans up the API so that e.g. callers don't have to store their
   allocator

This is part of a wider set of changes discussed in:
https://groups.google.com/forum/#!topic/v8-dev/QLsC0XPYLeM

Review-Url: https://codereview.chromium.org/2345233003
Cr-Commit-Position: refs/heads/master@{#39538}

Adds a fast path for loading DYNAMIC_GLOBAL variables, which are lookup
variables that can be globally loaded, without calling the runtime, as long as
there was no context extension by a sloppy eval along their context chain.

BUG=v8:5263

Review-Url: https://codereview.chromium.org/2347143002
Cr-Commit-Position: refs/heads/master@{#39537}

Internalize the ast-value-factory before tracing in trace-parse. Otherwise the string-handle isn't available yet

BUG=

Review-Url: https://codereview.chromium.org/2348373004
Cr-Commit-Position: refs/heads/master@{#39536}

... because the latter automatically respects the desired calling convention.

BUG=v8:5407

Review-Url: https://codereview.chromium.org/2358533002
Cr-Commit-Position: refs/heads/master@{#39535}

When an allocation for a parent object is pretenured, also propagate
that to all allocations for objects that are (potentially) stored into
the parent object.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2348293003
Cr-Commit-Position: refs/heads/master@{#39534}

BUG=v8:4947

Review-Url: https://codereview.chromium.org/2347883002
Cr-Commit-Position: refs/heads/master@{#39533}

This would've caught the "preparser tracking only unresolved variables
but no declarations is not enough" bug.

BUG=

Review-Url: https://codereview.chromium.org/2350683002
Cr-Commit-Position: refs/heads/master@{#39532}

Avoid internalizing on-the-fly now that scope analysis and natives syntax
runtime calls no longer require internalized AST values. This should be
more efficient by avoiding extra branches on every AST value creation.

BUG=v8:5215, chromium:634953

Review-Url: https://codereview.chromium.org/2328593002
Cr-Commit-Position: refs/heads/master@{#39531}

Adds template parameters for the TemplateHashMapImpl for the key and
value type, to allow them to be something other than pointers. To keep
the impact of this patch low, uses of TemplateHashMapImpl set these
types to void* to emulate the previous behaviour.

This is part of a wider set of changes discussed in:
https://groups.google.com/forum/#!topic/v8-dev/QLsC0XPYLeM

Review-Url: https://codereview.chromium.org/2343123002
Cr-Commit-Position: refs/heads/master@{#39530}

R=vogelheim@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2354683003
Cr-Commit-Position: refs/heads/master@{#39529}

R=littledan@chromium.org
BUG=v8:5339

Review-Url: https://codereview.chromium.org/2332333002
Cr-Commit-Position: refs/heads/master@{#39528}

Also remove obsolete oom_dump sources.

R=machenbach@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2343423002
Cr-Commit-Position: refs/heads/master@{#39527}

Revert of [d8] Fix the shared-library build (patchset #12 id:20002 of https://codereview.chromium.org/2342563002/ )

Reason for revert:
Unblocking roll

Original issue's description:
> [d8] Fix the shared-library build
>
> This commit ensures that the d8 shared library build uses the same logic as
> the standard static build by exporting relevant functions and classes.
>
> BUG=chromium:646337
>
> Committed: https://crrev.com/2c10ca8086a4d595ecf9aa843d2031b068470d65
> Cr-Commit-Position: refs/heads/master@{#39503}

TBR=jochen@chromium.org,vogelheim@chromium.org,bmeurer@chromium.org,titzer@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:646337

Review-Url: https://codereview.chromium.org/2356703003
Cr-Commit-Position: refs/heads/master@{#39526}

Crankshaft just unconditionally deoptimizes the code when the length of
a string addition result would overflow. In order to protect against
deopt loops we insert a global protector cell.

We will use the same mechanism for inlining certain string additions
into TurboFan as well, and protecting against overflow (we will also
extend this to deal with String.prototype.concat and friends once we
get there).

BUG=v8:5404
R=jarin@chromium.org,hpayer@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux64_msan_rel

Committed: https://crrev.com/cb19257a926a55209a6d6858ce26d51a0447ba71
Review-Url: https://codereview.chromium.org/2348293002
Cr-Original-Commit-Position: refs/heads/master@{#39511}
Cr-Commit-Position: refs/heads/master@{#39525}

Rolling v8/build to dfb08d9b315caad762d458ff3ed828e792913df3

Rolling v8/tools/clang to 6b75002bcce135ecacc1ff5a7fdb2f0647212198

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review-Url: https://codereview.chromium.org/2354613004
Cr-Commit-Position: refs/heads/master@{#39524}

Revert of Async/await Promise dependency graph (patchset #30 id:550001 of https://codereview.chromium.org/2317383002/ )

Reason for revert:
Need to break up test into smaller tests to avoid timeouts

Original issue's description:
> Async/await Promise dependency graph
>
> This patch knits together Promises returned by async/await such that when
> one async function awaits the result of another one, catch prediction works
> across the boundaries, whether the exception comes synchronously or
> asynchronously. Edges are added in three places:
> - When a locally uncaught await happens, if the value passed into await
>   is a Promise, from the awaited value to the Promise under construction
>   in the broader async function
> - From a "throwaway" Promise, which may be found on the Promise debug
>   stack, to the Promise under construction in the async function that
>   surrounds it
> - When a Promise is resolved with another Promise (e.g., when returning a
>   Promise from an async function)
>
> BUG=v8:5167
>
> Committed: https://crrev.com/7265fdde7c76b9f875b40b0b139515936d491d64
> Cr-Commit-Position: refs/heads/master@{#39522}

TBR=adamk@chromium.org,jgruber@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5167

Review-Url: https://codereview.chromium.org/2351953002
Cr-Commit-Position: refs/heads/master@{#39523}

This patch knits together Promises returned by async/await such that when
one async function awaits the result of another one, catch prediction works
across the boundaries, whether the exception comes synchronously or
asynchronously. Edges are added in three places:
- When a locally uncaught await happens, if the value passed into await
  is a Promise, from the awaited value to the Promise under construction
  in the broader async function
- From a "throwaway" Promise, which may be found on the Promise debug
  stack, to the Promise under construction in the async function that
  surrounds it
- When a Promise is resolved with another Promise (e.g., when returning a
  Promise from an async function)

BUG=v8:5167

Review-Url: https://codereview.chromium.org/2317383002
Cr-Commit-Position: refs/heads/master@{#39522}

BUG= https://bugs.chromium.org/p/v8/issues/detail?id=4203
BUG= https://bugs.chromium.org/p/v8/issues/detail?id=5406
LOG=N
R=mstarzinger@chromium.org,machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2309833003
Cr-Commit-Position: refs/heads/master@{#39521}

Reland of Fix async/await memory leak (patchset #1 id:1 of https://codereview.chromium.org/2348403003/ )

This patch closes a memory leak in async/await where the desugaring
was creating a situation analagous to that described in v8:5002.
Intermediate Promises were being kept alive, so a long-running loop
would cause linear memory usage on the heap. This patch returns
undefined to the 'then' callback passed into PerformPromiseThen
in order to avoid this hazard. Test expectations are fixed to remove
expecting extraneous events which occurred on Promises that are
now not given unnecessarily complex resolution paths before being
thrown away.

This patch is a reland; originally, tests which exercised the memory
exhaustion were checked in. Although it's possible to find good parameters
for running such tests locally, it is difficult to automate the tests
between the rock of timeouts and the hard place of too-small heaps
causing memory exhaustion in some modes even when there is no leak.

BUG=v8:5390

Review-Url: https://codereview.chromium.org/2352933002
Cr-Commit-Position: refs/heads/master@{#39520}

We must keep track of the exact order in which modules are requested.
To do so, maintain a map from module specifiers to position while
parsing (in ModuleDescriptor). Descriptor entries now refer to that
position rather than the string.  When generating the ModuleInfo, turn
this map into an array of specifiers. We don't need the map anymore
later on, so we do not reconstruct it when deserializing again.

BUG=v8:1569

Review-Url: https://codereview.chromium.org/2353633002
Cr-Commit-Position: refs/heads/master@{#39519}

Revert of [crankshaft] Protect against deopt loops from string length overflows. (patchset #1 id:1 of https://codereview.chromium.org/2348293002/ )

Reason for revert:
Mean https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/10910

Original issue's description:
> [crankshaft] Protect against deopt loops from string length overflows.
>
> Crankshaft just unconditionally deoptimizes the code when the length of
> a string addition result would overflow. In order to protect against
> deopt loops we insert a global protector cell.
>
> We will use the same mechanism for inlining certain string additions
> into TurboFan as well, and protecting against overflow (we will also
> extend this to deal with String.prototype.concat and friends once we
> get there).
>
> BUG=v8:5404
> R=jarin@chromium.org,hpayer@chromium.org
>
> Committed: https://crrev.com/cb19257a926a55209a6d6858ce26d51a0447ba71
> Cr-Commit-Position: refs/heads/master@{#39511}

TBR=hpayer@chromium.org,jarin@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5404

Review-Url: https://codereview.chromium.org/2357433002
Cr-Commit-Position: refs/heads/master@{#39518}

Port: 2ab3fcf4

Original commit message:

	To make better inlining decisions, it's good to have call
counts for poly/mega-morphic cases. This CL makes it work for calls,
and another will follow to better unify the code between constructor
calls and normal calls (and thence, to record megamorphic call counts
there as well).

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/2356483002
Cr-Commit-Position: refs/heads/master@{#39517}

Revert of [cq] Temporarily make failing chromium trybot experimental (patchset #1 id:1 of https://codereview.chromium.org/2352573002/ )

Reason for revert:
Real fix landed by now.

Original issue's description:
> [cq] Temporarily make failing chromium trybot experimental
>
> BUG=chromium:648153
> NOTRY=true
> NOPRESUBMIT=true
> TBR=emso@chromium.org
>
> Committed: https://crrev.com/bb6fa481b6e8e643cb86d66cfa5b8bb35d1dd320
> Cr-Commit-Position: refs/heads/master@{#39494}

TBR=emso@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:648153

Review-Url: https://codereview.chromium.org/2353713002
Cr-Commit-Position: refs/heads/master@{#39516}

Handle the case of asm.js modules that return a single function
instead of a collection of them.

R=mtrofin@chromium.org
TEST=mjsunit/asm/asm-wasm
BUG=v8:4203
BUG=v8:5356

Review-Url: https://codereview.chromium.org/2348383003
Cr-Commit-Position: refs/heads/master@{#39515}

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2349193002
Cr-Commit-Position: refs/heads/master@{#39514}

Introduce TraceStateObserver interface along with add/remove
methods to the platform.

BUG=chromium:406277

Review-Url: https://codereview.chromium.org/2344893005
Cr-Commit-Position: refs/heads/master@{#39513}

Revert of Fix async/await memory leak (patchset #5 id:160001 of https://codereview.chromium.org/2348403002/ )

Reason for revert:
Still causes issues on bot (sometimes!)

Original issue's description:
> Reland of Fix async/await memory leak (patchset #1 id:1 of https://codereview.chromium.org/2354473002/ )
>
> Reason for revert:
> Relanding with faster-running test
>
> Original issue's description:
> > Revert of Fix async/await memory leak (patchset #5 id:80001 of https://codereview.chromium.org/2334323006/ )
> >
> > Reason for revert:
> > newly introduced test async-await-loop times out: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/10894/steps/Ignition%20-%20turbofan%20%28flakes%29/logs/async-await-loop
> >
> > Original issue's description:
> > > Fix async/await memory leak
> > >
> > > This patch closes a memory leak in async/await where the desugaring
> > > was creating a situation analagous to that described in v8:5002.
> > > Intermediate Promises were being kept alive, so a long-running loop
> > > would cause linear memory usage on the heap. This patch returns
> > > undefined to the 'then' callback passed into PerformPromiseThen
> > > in order to avoid this hazard. Test expectations are fixed to remove
> > > expecting extraneous events which occurred on Promises that are
> > > now not given unnecessarily complex resolution paths before being
> > > thrown away.
> > >
> > > BUG=v8:5390
> > >
> > > Committed: https://crrev.com/a0ba18e9634c5e2d439033ab61a77cff54f9af35
> > > Cr-Commit-Position: refs/heads/master@{#39479}
> >
> > TBR=adamk@chromium.org,caitp@igalia.com,littledan@chromium.org
> > NOTRY=true
> > BUG=v8:5390
> >
> > Committed: https://crrev.com/196db1999da130019bbf8e3bd65977f840e8afaf
> > Cr-Commit-Position: refs/heads/master@{#39493}
>
> TBR=adamk@chromium.org,caitp@igalia.com,hablich@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> BUG=v8:5390
>
> Committed: https://crrev.com/e51482f01f26e0013e6377e85c4d2c41900e403c
> Cr-Commit-Position: refs/heads/master@{#39508}

TBR=adamk@chromium.org,caitp@igalia.com,hablich@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5390

Review-Url: https://codereview.chromium.org/2348403003
Cr-Commit-Position: refs/heads/master@{#39512}

Crankshaft just unconditionally deoptimizes the code when the length of
a string addition result would overflow. In order to protect against
deopt loops we insert a global protector cell.

We will use the same mechanism for inlining certain string additions
into TurboFan as well, and protecting against overflow (we will also
extend this to deal with String.prototype.concat and friends once we
get there).

BUG=v8:5404
R=jarin@chromium.org,hpayer@chromium.org

Review-Url: https://codereview.chromium.org/2348293002
Cr-Commit-Position: refs/heads/master@{#39511}

Previously we didn't implement TRACE_STR_COPY when we write trace events to
file, which causes us to allocate a growing independent memory chunk for dumped
runtime call stats table. Since we now have a fully functional TRACE_STR_COPY,
this memory allocation can be avoided, this patch removes it.

BUG=v8:5089

Committed: https://crrev.com/e1997bb7d780d12e3a89078e8dd652dcf1d90039
Review-Url: https://codereview.chromium.org/2342643004
Cr-Original-Commit-Position: refs/heads/master@{#39462}
Cr-Commit-Position: refs/heads/master@{#39510}

This CL avoids relying on signed/unsigned implicit conversions
when re-computing wasm mem sizes.

BUG=

Review-Url: https://codereview.chromium.org/2349053002
Cr-Commit-Position: refs/heads/master@{#39509}

Reland of Fix async/await memory leak (patchset #1 id:1 of https://codereview.chromium.org/2354473002/ )

Reason for revert:
Relanding with faster-running test

Original issue's description:
> Revert of Fix async/await memory leak (patchset #5 id:80001 of https://codereview.chromium.org/2334323006/ )
>
> Reason for revert:
> newly introduced test async-await-loop times out: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/10894/steps/Ignition%20-%20turbofan%20%28flakes%29/logs/async-await-loop
>
> Original issue's description:
> > Fix async/await memory leak
> >
> > This patch closes a memory leak in async/await where the desugaring
> > was creating a situation analagous to that described in v8:5002.
> > Intermediate Promises were being kept alive, so a long-running loop
> > would cause linear memory usage on the heap. This patch returns
> > undefined to the 'then' callback passed into PerformPromiseThen
> > in order to avoid this hazard. Test expectations are fixed to remove
> > expecting extraneous events which occurred on Promises that are
> > now not given unnecessarily complex resolution paths before being
> > thrown away.
> >
> > BUG=v8:5390
> >
> > Committed: https://crrev.com/a0ba18e9634c5e2d439033ab61a77cff54f9af35
> > Cr-Commit-Position: refs/heads/master@{#39479}
>
> TBR=adamk@chromium.org,caitp@igalia.com,littledan@chromium.org
> NOTRY=true
> BUG=v8:5390
>
> Committed: https://crrev.com/196db1999da130019bbf8e3bd65977f840e8afaf
> Cr-Commit-Position: refs/heads/master@{#39493}

TBR=adamk@chromium.org,caitp@igalia.com,hablich@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
BUG=v8:5390

Review-Url: https://codereview.chromium.org/2348403002
Cr-Commit-Position: refs/heads/master@{#39508}

This is in preparation for upcmoming scanner + bookmarking cleanups.

Also, drive-by fix for setting a bookmark close to the end of the stream,
when the look-ahead character (c0_) is kEndOfInput, which the bookmarking
logic also used as kNoBookmark.

R=marja@chomium.org
BUG=v8:4947

Review-Url: https://codereview.chromium.org/2345053003
Cr-Commit-Position: refs/heads/master@{#39507}