There were once plans to generate cross-context code with TurboFan,
however that doesn't fit into the model anymore, and so all of this
is essentially dead untested code (and thus most likely already broken
in subtle ways). With this mode still in place it would also be a lot
harder to make inlining based on SharedFunctionInfo work.

BUG=v8:2206,v8:5499
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2406803002
Cr-Commit-Position: refs/heads/master@{#40109}

Updated the deserialization API to avoid copying uncompiled
bytes.

BUG=

Review-Url: https://codereview.chromium.org/2404673002
Cr-Commit-Position: refs/heads/master@{#40108}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/472d19e..17093d4

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

Review-Url: https://codereview.chromium.org/2401273002
Cr-Commit-Position: refs/heads/master@{#40107}

And not by pointer address.

BUG=

Review-Url: https://codereview.chromium.org/2390823011
Cr-Commit-Position: refs/heads/master@{#40106}

Cr-Commit-Position: refs/heads/master@{#40105}

Rolling v8/base/trace_event/common: https://chromium.googlesource.com/chromium/src/base/trace_event/common/+log/e0fa02a..b403fa6

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/792a87c..472d19e

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clan/+log/30c5a8b..36879c7

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

Review-Url: https://codereview.chromium.org/2405683002
Cr-Commit-Position: refs/heads/master@{#40104}

These tests were marked as NO_VARIANTS under debug, but they were timing
out under turbofan_opt as well on the CFI bot (see, e.g.:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20cfi/builds/6765).

R=machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2400463003
Cr-Commit-Position: refs/heads/master@{#40103}

This allows us to stop using a Symbol, set as the name of the Module's
SharedFunctionInfo, as our storage for a hash.

As part of this, centralize the code for generating a random, non-zero
hash code in one place (there were previously two copies of this code,
and I needed to call it from a third file).

BUG=v8:5483
TBR=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2395233003
Cr-Commit-Position: refs/heads/master@{#40102}

This problem was detected only on linux64_gyp bot.
It's safe to convert length string into int from size_t.

R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2402583004
Cr-Commit-Position: refs/heads/master@{#40101}

Revert of Pool implementation for zone segments (patchset #13 id:520001 of https://codereview.chromium.org/2335343007/ )

Reason for revert:
blocks roll: https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_rel_ng/builds/294283/steps/compile%20%28with%20patch%29/logs/stdio

Original issue's description:
> Pool implementation for zone segments
>
> BUG=v8:5409
>
> Committed: https://crrev.com/37c688a24578e787d3d8941093563ed049c3497e
> Committed: https://crrev.com/316669f62ea3834395bf4caab7bc3d7c32f6bbc6
> Cr-Original-Commit-Position: refs/heads/master@{#39631}
> Cr-Commit-Position: refs/heads/master@{#40044}

TBR=jochen@chromium.org,jkummerow@chromium.org,verwaest@chromium.org,yangguo@chromium.org,heimbuef@google.com
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
BUG=v8:5409

Review-Url: https://codereview.chromium.org/2400343002
Cr-Commit-Position: refs/heads/master@{#40100}

Revert of Replaced different means of zone pooling/reusing by one zone segment pool (patchset #5 id:160001 of https://codereview.chromium.org/2348303002/ )

Reason for revert:
related to roll blocker: https://codereview.chromium.org/2400343002/

Original issue's description:
> Replaced different means of zone pooling/reusing by one zone segment pool
>
> BUG=v8:5409
>
> Committed: https://crrev.com/a124feb0760896c8be61de08004a08c3bc9b4b3f
> Committed: https://crrev.com/fc840361e357a571c709e0239ae82cc089800b3f
> Cr-Original-Commit-Position: refs/heads/master@{#39633}
> Cr-Commit-Position: refs/heads/master@{#40048}

TBR=mstarzinger@chromium.org,verwaest@chromium.org,heimbuef@google.com
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
BUG=v8:5409

Review-Url: https://codereview.chromium.org/2401163002
Cr-Commit-Position: refs/heads/master@{#40099}

String16 is not public part of src/inspector. All usage are replaced with vector of char/unit16_t to avoid potential linker problems.

BUG=chromium:635948
R=dgozman@chromium.org,machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2403493002
Cr-Commit-Position: refs/heads/master@{#40098}

Revert of [parser] Deprecate ParseInfo constructor taking closure. (patchset #2 id:20001 of https://codereview.chromium.org/2396963003/ )

Reason for revert:
Needed to revert https://codereview.chromium.org/2400343002/

Original issue's description:
> [parser] Deprecate ParseInfo constructor taking closure.
>
> This removes the {ParseInfo} constructor consuming a closure, replacing
> all uses to pass only the shared function info. The goal is to make the
> fact that parsing is independent of a concrete closure explicit.
>
> R=jochen@chromium.org
> BUG=v8:2206
>
> Committed: https://crrev.com/3de42b3f224217ec88e4c609d3cf23fe06806dca
> Cr-Commit-Position: refs/heads/master@{#40083}

TBR=jochen@chromium.org,bmeurer@chromium.org,marja@chromium.org,yangguo@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:2206

Review-Url: https://codereview.chromium.org/2406623002
Cr-Commit-Position: refs/heads/master@{#40097}

This implements namespace imports (import * as foo from "bar"), except for the
@@iterator property on namespace objects (to be done later).

R=adamk@chromium.org
BUG=v8:1569

Review-Url: https://codereview.chromium.org/2388153003
Cr-Commit-Position: refs/heads/master@{#40096}

Both bits of code were pointed out by our test coverage tools.

R=gsathya@chromium.org

Review-Url: https://codereview.chromium.org/2394403002
Cr-Commit-Position: refs/heads/master@{#40095}

Found with libfuzzer. The length is automatically converted to int (thus
large sizes could become negative, even though they are legal "array sizes").
Besides that, the length is coerced to a SMI (which is an even tighter
constraint on 32-bit systems, where it limits the legal sizes to 2^30 - 1).

Add checks that the length of a dense array is below that threshold, and also
fail fast if a length that is provided obviously could not be the correct dense
length (because there isn't enough data left in the buffer to populate such an
array).

BUG=chromium:148757

Review-Url: https://codereview.chromium.org/2399873002
Cr-Commit-Position: refs/heads/master@{#40094}

BUG=v8:5364

Review-Url: https://codereview.chromium.org/2350963004
Cr-Commit-Position: refs/heads/master@{#40093}

Port ec132e05

Original commit message:

    (GcStress failure was unrelated.)

    At one time, we hoped to generate the same code for different
    native contexts. But in truth, much performance comes from optimizing
    on the native context. Now we abandon this pathway.

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

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2401043002
Cr-Commit-Position: refs/heads/master@{#40092}

BUG=v8:5451,v8:5496
TBR=mtrofin@chromium.org, titzer@chromium.org, ahaas@chromium.org
NOTRY=true
NOTREECHECKS=true

Review-Url: https://codereview.chromium.org/2399343003
Cr-Commit-Position: refs/heads/master@{#40091}

A wide jump can be patched with a non-wide jump target operand, so the
DCHECK added in r39637 was wrong.

BUG=chromium:652430

Review-Url: https://codereview.chromium.org/2400203002
Cr-Commit-Position: refs/heads/master@{#40090}

This removes the restriction of only allowing lazy compilation for
top-level eval code with a context. We can by now compile such code
without a concrete closure.

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2400973002
Cr-Commit-Position: refs/heads/master@{#40089}

Previously this would result in applying trying to find a size modulo zero,
which causes SIGFPE. This approach was preferred over adding a default case
to preserve the ability of the compiler to detect unhandled switch cases
(within the valid range of the enum).

BUG=chromium:148757

Review-Url: https://codereview.chromium.org/2395073003
Cr-Commit-Position: refs/heads/master@{#40088}

BUG=

Committed: https://crrev.com/7db0ecdec3cf330766575cb7973b983f3f1e3020
Review-Url: https://codereview.chromium.org/2381843002
Cr-Original-Commit-Position: refs/heads/master@{#40080}
Cr-Commit-Position: refs/heads/master@{#40087}

(GcStress failure was unrelated.)

At one time, we hoped to generate the same code for different
native contexts. But in truth, much performance comes from optimizing
on the native context. Now we abandon this pathway.

BUG=
TBR=bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true

Review URL: https://codereview.chromium.org/2402663002 .

Cr-Commit-Position: refs/heads/master@{#40086}

In the process, also fix a merge hiccup that clobbered https://codereview.chromium.org/2003663002/ back in May.

BUG=chromium:608675
LOG=N

Review-Url: https://codereview.chromium.org/2397223002
Cr-Commit-Position: refs/heads/master@{#40085}

The create.js file is loaded unconditionally in run.js,
therefore we need to add it to resources, otherwise it
fails on Android.

TBR=caitp@igalia.com
NOTRY=true

Review-Url: https://codereview.chromium.org/2401883002
Cr-Commit-Position: refs/heads/master@{#40084}

This removes the {ParseInfo} constructor consuming a closure, replacing
all uses to pass only the shared function info. The goal is to make the
fact that parsing is independent of a concrete closure explicit.

R=jochen@chromium.org
BUG=v8:2206

Review-Url: https://codereview.chromium.org/2396963003
Cr-Commit-Position: refs/heads/master@{#40083}

This reverts commit 7db0ecde.

Manual revert since automatic revert is too large for the web interface.

BUG=
TBR=bmeurer@chromium.org,mstarzinger@chromium.org,yangguo@chromium.org,ahaas@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true

Review-Url: https://codereview.chromium.org/2396353002
Cr-Commit-Position: refs/heads/master@{#40082}

Revert of [turbofan] Discard the shared code entry in the optimized code map. (patchset #3 id:40001 of https://codereview.chromium.org/2401653002/ )

Reason for revert:
Possible GCSTRESS failure, investigating.

Original issue's description:
> [turbofan] Discard the shared code entry in the optimized code map.
>
> At one time, we hoped to generate the same code for different
> native contexts. But in truth, much performance comes from optimizing
> on the native context. Now we abandon this pathway.
>
> BUG=
>
> Committed: https://crrev.com/55af3c44c99a6e4cd6d53df775023d760ad2b2c3
> Cr-Commit-Position: refs/heads/master@{#40079}

TBR=mstarzinger@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=

Review-Url: https://codereview.chromium.org/2403453002
Cr-Commit-Position: refs/heads/master@{#40081}

BUG=

Review-Url: https://codereview.chromium.org/2381843002
Cr-Commit-Position: refs/heads/master@{#40080}

At one time, we hoped to generate the same code for different
native contexts. But in truth, much performance comes from optimizing
on the native context. Now we abandon this pathway.

BUG=

Review-Url: https://codereview.chromium.org/2401653002
Cr-Commit-Position: refs/heads/master@{#40079}

The _ParseException function in testcfg.py made incorrect assumptions about how
exceptions are printed (I believe it expected a trace like that produced by
Error).

R=littledan@chromium.org
BUG=v8:5136

Review-Url: https://codereview.chromium.org/2386103010
Cr-Commit-Position: refs/heads/master@{#40078}

In CreateModuleObjectFromBytes, pointers to the raw bytes will be stored
inside the decoded WasmModule, and still used after allocating V8 stuff
in WasmModule::CompileFunctions. We thus cannot pass a raw pointer to
the V8 heap.
Fix this by copying the bytes before decoding.

R=mtrofin@chromium.org, titzer@chromium.org

Review-Url: https://codereview.chromium.org/2402633002
Cr-Commit-Position: refs/heads/master@{#40077}

R=mtrofin@chromium.org,gdeepti@chromium.org
BUG=chromium:575167

Review-Url: https://codereview.chromium.org/2392943006
Cr-Commit-Position: refs/heads/master@{#40076}

BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2397373002
Cr-Commit-Position: refs/heads/master@{#40075}

For now keep the logic in compiler.cc and add a DCHECK that the scopes
and compiler.cc agree.

Use this knowledge to only created ScopeInfos for literals we'll
actually compile.

BUG=v8:5394,v8:5422
R=marja@chromium.org,verwaest@chromium.org

Review-Url: https://codereview.chromium.org/2399833002
Cr-Commit-Position: refs/heads/master@{#40074}

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

Review-Url: https://codereview.chromium.org/2397253002
Cr-Commit-Position: refs/heads/master@{#40073}

This implicitly convers parseFloat on the global object as well, since
it's the same function. This is mostly straight-forward, but adds
another fast case for HeapNumbers as well.

R=ishell@chromium.org

Review-Url: https://codereview.chromium.org/2395373002
Cr-Commit-Position: refs/heads/master@{#40072}

Revert of [esnext] ship String.prototype.padStart / String.prototype.padEnd (patchset #1 id:1 of https://codereview.chromium.org/2382193002/ )

Reason for revert:
Causes several GC bugs, e.g. https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20gc%20stress/builds/2858/steps/Mjsunit/logs/debug-constructed-by

Original issue's description:
> [esnext] ship String.prototype.padStart / String.prototype.padEnd
>
> Enable the --harmony-string-padding flag by default
>
> BUG=v8:4954
> R=adamk@chromium.org, littledan@chromium.org
>
> Committed: https://crrev.com/8352a0feaccfd9a19f3b38564ed2c0859dd6e3d5
> Cr-Commit-Position: refs/heads/master@{#40060}

TBR=littledan@chromium.org,adamk@chromium.org,foolip@chromium.org,caitp@igalia.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4954

Review-Url: https://codereview.chromium.org/2398183003
Cr-Commit-Position: refs/heads/master@{#40071}

R=marja@chromium.org

Review-Url: https://codereview.chromium.org/2392303004
Cr-Commit-Position: refs/heads/master@{#40070}