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[v12.x] Backport update to V8 7.8 #30109

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@targos targos commented Oct 25, 2019 •
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Backport of #29694

Two things left to do (please help if you can):

@targos targos added semver-minor PRs that contain new features and should be released in the next minor version. v8 engine Issues and PRs related to the V8 dependency. v12.x labels Oct 25, 2019
@nodejs-github-bot nodejs-github-bot added the build Issues and PRs related to build files or the CI. label Oct 25, 2019
@targos targos mentioned this pull request Oct 25, 2019
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addaleax commented Oct 25, 2019 •
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I’ve pushed changes for the merge conflict and some ABI-compat changes. The Node.js tests pass, but I don’t know how to best run the V8 tests locally (./configure && make test-v8 doesn’t work for me on a clean checkout of this branch).

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/2583/

Also, the TracedGlobal changes look like they’re going to be the trickiest by far.

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CI: https://ci.nodejs.org/job/node-test-pull-request/26200/

@mhofman mhofman mentioned this pull request Oct 25, 2019
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CI: https://ci.nodejs.org/job/node-test-pull-request/26203/

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Ok, so here’s the remaining header diff: https://gist.github.com/addaleax/15afba086636bad8af3b846074464b89

I’m not sure that we have to be concerned about the TickSample removal and the TracedGlobal/EmbedderHeapTracer changes … the latter feature isn’t used by us, and I don’t think it would make sense to use it for addons that aren’t in control of the Isolate.

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/2585/

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CI: https://ci.nodejs.org/job/node-test-pull-request/26207/

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New V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/2586/

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Looks like there’s something wrong with the snapshot generation and I’m not really sure how to proceed … @targos this feels a bit familiar, do you remember something?

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targos commented Oct 27, 2019

@addaleax in that case I don't know. Sometimes PPC fails on a new V8 release because a patch needs to be backported, but we didn't have this problem with the original 7.8 PR.
It's possible that one of the changes that you reverted got ported to PPC afterwards and we also need to revert the port.

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It's possible that one of the changes that you reverted got ported to PPC afterwards and we also need to revert the port.

I don’t see how any of these would affect something platform-specific…

Here’s a V8 CI for this, without my changes: https://ci.nodejs.org/job/node-test-commit-v8-linux/2589/

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mhdawson commented Nov 1, 2019

@sam-github I think the PPC failures are likely related the python issue you are working on right?

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@alangpierce alangpierce mentioned this pull request Nov 12, 2019
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targos commented Dec 4, 2019

Rebased and cleaned up the commit log. Let's see how CI goes!

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nodejs-github-bot commented Dec 4, 2019 •
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CI: https://ci.nodejs.org/job/node-test-pull-request/27329/
V8: https://ci.nodejs.org/job/node-test-commit-v8-linux/2676/

@targos targos force-pushed the v8-7.8-v12.x branch 2 times, most recently from b48295f to 000d83b Compare December 5, 2019 13:46
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CI: https://ci.nodejs.org/job/node-test-pull-request/27352/

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targos commented Dec 5, 2019

@nodejs/platform-aix @nodejs/platform-ppc do you see what could be causing the failures on IBM platforms?

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targos commented Dec 5, 2019

Plinux run without the compatibility patches: https://ci.nodejs.org/view/All/job/node-test-commit-plinux/29462/

BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @BethGriggs
deps: update V8 to 7.8.279.23
35f2892 
PR-URL: #30109
Reviewed-By: Myles Borins <myles.borins@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @BethGriggs
build: reset embedder string to "-node.0"
a91ed2e 
PR-URL: #30109
Reviewed-By: Myles Borins <myles.borins@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@refack @BethGriggs
deps: V8: fix filename manipulation for Windows
fdad5b6 
Backport-PR-URL: #30109
PR-URL: #28016
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@refack @BethGriggs
deps: V8: un-cherry-pick bd019bd
4bf6e02 
Original commit message:

    [testrunner] delete ancient junit compatible format support

    Testrunner has ancient support for JUnit compatible XML output.

    This CL removes this old feature.

    R=mstarzinger@chromium.org,jgruber@chromium.org,jkummerow@chromium.org
    CC=​machenbach@chromium.org

    Bug: v8:8728
    Change-Id: I7e1beb011dbaec3aa1a27398a5c52abdd778eaf0
    Reviewed-on: https://chromium-review.googlesource.com/c/1430065
    Reviewed-by: Jakob Gruber <jgruber@chromium.org>
    Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
    Commit-Queue: Tamer Tas <tmrts@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#59045}

Refs: v8/v8@bd019bd

Backport-PR-URL: #30109
PR-URL: #26685
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @BethGriggs
deps: V8: silence irrelevant warning
fe18796 
Backport-PR-URL: #30109
PR-URL: #26685
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@refack @BethGriggs
deps: V8: patch register-arm64.h
5a31dc8 
Fixes a compilation issue on some platforms

Backport-PR-URL: #30109
PR-URL: #27375
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@refack @BethGriggs
deps: V8: forward declaration of Rtl*FunctionTable
d98789b 
This should be semver-patch since actual invocation is version
conditional.

Backport-PR-URL: #30109
PR-URL: #27375
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@refack @BethGriggs
deps: V8: use ATOMIC_VAR_INIT instead of std::atomic_init
9135bc2 
`std::atomic_init<size_t>` is not implemented on all platforms.

Backport-PR-URL: #30109
PR-URL: #27375
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@refack @BethGriggs
deps: V8: add workaround for MSVC optimizer bug
3d11924 
Refs: https://developercommunity.visualstudio.com/content/problem/512352/compiler-doesnt-finish-142027508.html

Backport-PR-URL: #30109
PR-URL: #28016
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@refack @BethGriggs
deps: V8: fix BUILDING_V8_SHARED issues
0d20a85 
Backport-PR-URL: #30109
PR-URL: #27375
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@refack @BethGriggs
deps: V8: fix linking issue for MSVS
d89f874 
Backport-PR-URL: #30109
PR-URL: #28016
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @BethGriggs
tools: update V8 gypfiles
0df4910 
until c6196ad7a2d601a4e1fdb313bfe2ec727fd67f7a

Co-authored-by: Ujjwal Sharma <usharma1998@gmail.com>
Co-authored-by: Michaël Zasso <targos@protonmail.com>

Backport-PR-URL: #30109
PR-URL: #29694
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @BethGriggs
assert: fix line number calculation after V8 upgrade
b4e8f0d 
Backport-PR-URL: #30109
PR-URL: #29694
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@ryzokuken @BethGriggs
tools: patch V8 to run on older XCode versions
a19e9bd 
Patch V8 (compiler/js-heap-broker.cc) to remove the use of an optional
property, which is a fairly new C++ feature, since that requires a newer
XCode version than the minimum requirement in BUILDING.md and thus
breaks CI.

Backport-PR-URL: #30109
PR-URL: #29694
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@bcoe @BethGriggs
deps: V8: cherry-pick deac757
c43f5be 
Original commit message:

    [debugger] Fix code coverage for break/return inside switch-case

    Case statements have a list of statements associated with them, but are
    not blocks, and were hence not fixed-up correctly for code coverage.
    This CL also applies the fix-up to the "body" of case statements,
    in this way removing ranges reported as uncovered between the final
    break/return in a case and the next case (or end of function).

    Drive-by: Add optional pretty printing to code coverage test results.

    Change-Id: I5f4002d4e17b7253ed516d99f7c389ab2264be10
    Bug: v8:9705
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798426
    Reviewed-by: Toon Verwaest <verwaest@chromium.org>
    Reviewed-by: Jakob Gruber <jgruber@chromium.org>
    Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#63719}

Refs: v8/v8@deac757

Backport-PR-URL: #30109
PR-URL: #29626
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@sam-github @BethGriggs
deps: V8: cherry-pick 35c6d4d
667b9a4 
Original commit message:

    Make code generator python3.7 compatible (async keyword).

    Change-Id: Ifcd8b8cb1de60a007c7bbd4564d7869e83cb7109

Fixes: #29548
Refs:
- #29548 (comment)
- #29520
- #29340
- https://chromium-review.googlesource.com/c/deps/inspector_protocol/+/1781351
- https://chromium.googlesource.com/deps/inspector_protocol/+/35c6d4d0d80b42d81bd00bcb1eb2b1093c80ed0a

Backport-PR-URL: #30109
PR-URL: #29585
Refs: #29520
Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@MylesBorins @BethGriggs
deps: V8: cherry-pick 716875d
4cdccbd 
Original commit message:

    [build] Add message-template.h to build file

    This was missed during a file move and can cause build bugs.

    Bug: chromium:991547
    Change-Id: I157e7bb656956c08293c205c0d00884aecc7adee
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798430
    Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
    Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
    Auto-Submit: Peter Marshall <petermarshall@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#63711}

Refs: v8/v8@716875d

Backport-PR-URL: #30109
PR-URL: #29694
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @BethGriggs
deps: V8: cherry-pick ed40ab1
98dfe27 
Original commit message:

    [regexp] Fix the order of named captures on the groups object

    Named capture properties on the groups object should be ordered by the
    capture index (and not alpha-sorted). This was accidentally broken in
    https://crrev.com/c/1687413.

    Bug: v8:9822,v8:9423
    Change-Id: Iac6f866f077a1b7ce557ba47e8ba5d7e7014b3ce
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1864829
    Auto-Submit: Jakob Gruber <jgruber@chromium.org>
    Reviewed-by: Peter Marshall <petermarshall@chromium.org>
    Commit-Queue: Peter Marshall <petermarshall@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#64306}

Refs: v8/v8@ed40ab1
Fixes: #29878

Backport-PR-URL: #30109
PR-URL: #30064
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@BethGriggs
deps: V8: cherry-pick e5dbc95
25dd890 
Original commit message:

    [api] Fix handle leak when getting Context embedder data

    The `Context::SlowGetAlignedPointerFromEmbedderData()` method returns
    a pointer, so the fact that it allocates handles is not obvious to
    the caller.

    Since this is the slow path anyway, simply add a handle scope inside
    of it.

    The tests are also modified to perform the same check for the
    `Object` equivalent of this method.

    Change-Id: I5f03c9a7b70b3a17315609df021606a53c9feb2d
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1879902
    Reviewed-by: Yang Guo <yangguo@chromium.org>
    Commit-Queue: Yang Guo <yangguo@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#64583}

Refs: v8/v8@e5dbc95
Fixes: #30127
Backport-PR-URL: #30109
PR-URL: #30130
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @BethGriggs
deps: V8: cherry-pick 0a055086c377
5e1da86 
Original commit message:

    PPC: Using a scratch register under LoadRealStackLimit

    Change-Id: Id9e9142a8ff185309b91dcfff70dae8ccf8b5166
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1954244
    Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
    Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
    Cr-Commit-Position: refs/heads/master@{#65357}

Refs: v8/v8@0a05508
PR-URL: #30109
Reviewed-By: Myles Borins <myles.borins@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@cclauss @BethGriggs
deps: V8: cherry-pick a7dffcd767be
593d989 
Original commit message:

    [postmortem] Load files using utf-8 to support Python 3

    Change-Id: I174d38cc33210c07d1a7596627e1b2d21bb06313
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1895560
    Reviewed-by: Mathias Bynens <mathias@chromium.org>
    Commit-Queue: Michaël Zasso <mic.besace@gmail.com>
    Cr-Commit-Position: refs/heads/master@{#64717}

Refs: v8/v8@a7dffcd

Backport-PR-URL: #30109
PR-URL: #30218
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@cjihrig @BethGriggs
deps: update V8's postmortem script
18c713d 
This commit updates V8's postmortem metadata generation script
to support V8 7.8.

The following metadata has changed:

- v8dbg_class_JSDate__value__Object
  - The postmortem metadata generation script needed to be
    updated. No action should be required by postmortem tools.

- v8dbg_class_JSRegExp__source__Object
  - The postmortem metadata generation script needed to be
    updated. No action should be required by postmortem tools.

Backport-PR-URL: #30109
PR-URL: #29694
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @BethGriggs
deps: patch V8 to be API/ABI compatible with 7.4 (from 7.5)
bb616bb 
Reverts v8/v8@1b51dca
Reverts v8/v8@1ab717d
Partially reverts v8/v8@b0077b3

Backport-PR-URL: #30109
Backport-PR-URL: #29241
Backport-PR-URL: #28955
PR-URL: #28005
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @addaleax @BethGriggs
deps: patch V8 to be API/ABI compatible with 7.4 (from 7.6)
499ccdc 
Reverts v8/v8@4214933.
Reverts v8/v8@c76f377.
Reverts v8/v8@e0d7f81.

Co-authored-by: Anna Henningsen <anna@addaleax.net>
Backport-PR-URL: #30109
Backport-PR-URL: #29241
PR-URL: #28955
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@targos @addaleax @BethGriggs
deps: patch V8 to be API/ABI compatible with 7.4 (from 7.7)
b335529 
Co-authored-by: Anna Henningsen <anna@addaleax.net>
Backport-PR-URL: #30109
PR-URL: #29241
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
BethGriggs pushed a commit that referenced this pull request Feb 6, 2020
@addaleax @BethGriggs
deps,src: patch V8 to be API/ABI compatible with 7.4 (from 7.8)
8d336ff 
deps: revert 2ac8bb719 from upstream V8

Original commit message:

    profiler: Allow querying SnapshotObjectId for native objects

    - Adds regular native heap entries to the HeapObjectsMap.
    - Adds a side map for keeping a mapping of native objects to their canonical
      heap entry that they have been merged into.

    Change-Id: Ida00628126ded1948ceb2a0cbe14da817af7f361
    Bug: chromium:988350
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1720810
    Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
    Reviewed-by: Alexei Filippov <alph@chromium.org>
    Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#63140}

Refs: v8/v8@2ac8bb7

[The `SuppressMicrotaskExecutionScope` hack only works because
the constructor that allows specifying an alternative microtask
queue was never actually implemented.]

deps: revert fb698cec37 from upstream V8

Original commit message:

    [isolate-data] Move hot fields closer to isolate_root

    In generated code, we access fields inside IsolateData through the
    root-register. On some platforms it is significantly cheaper to access
    things that are close to the root-register value than things that are
    located far away. The motivation for this CL was a 5% difference in
    Octane/Mandreel scores between

    // Part of the stack check.
    cmpq rsp,[r13+0x9ea8]

    and

    cmpq rsp,[r13-0x30]  // Mandreel score improved by 5%.

    This moves the StackGuard up to fix Mandreel. As a drive-by, also move
    two more fields up that are accessed by each CallCFunction.

    Tbr: yangguo@chromium.org
    Bug: v8:9534,chromium:993264
    Change-Id: I5418b63d40274a138e285fa3c99b96e33a814fb1
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1751345
    Reviewed-by: Jakob Gruber <jgruber@chromium.org>
    Reviewed-by: Yang Guo <yangguo@chromium.org>
    Auto-Submit: Jakob Gruber <jgruber@chromium.org>
    Commit-Queue: Yang Guo <yangguo@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#63187}

Refs: v8/v8@fb698ce

src: re-add flags removed in V8 7.8 as no-ops

PR-URL: #30109
Reviewed-By: Myles Borins <myles.borins@gmail.com>
@MylesBorins MylesBorins mentioned this pull request Feb 8, 2020
Merged
targos pushed a commit that referenced this pull request Feb 11, 2020
@MylesBorins @targos
2020-02-11, Version 12.16.0 'Erbium' (LTS)
d20e494 
Notable changes:

New assert APIs

The `assert` module now provides experimental `assert.match()` and
`assert.doesNotMatch()` methods. They will validate that the first argument is a
string and matches (or does not match) the provided regular expression

This is an experimental feature.

Ruben Bridgewater [#30929](#30929).

Advanced serialization for IPC

The `child_process` and `cluster` modules now support a `serialization` option
to change the serialization mechanism used for IPC. The option can have one of
two values:

* `'json'` (default): `JSON.stringify()` and `JSON.parse()` are used. This is
  how message serialization was done before.
* `'advanced'`: The serialization API of the `v8` module is used. It is based on
  the HTML structured clone algorithm.
  and is able to serialize more built-in JavaScript object types, such as
  `BigInt`, `Map`, `Set` etc. as well as circular data structures.

Anna Henningsen [#30162](#30162).

CLI flags

The new `--trace-exit` CLI flag makes Node.js print a stack trace whenever the
Node.js environment is exited proactively (i.e. by invoking the `process.exit()`
function or pressing Ctrl+C).

legendecas [#30516](#30516).

___

The new `--trace-uncaught` CLI flag makes Node.js print a stack trace at the
time of throwing uncaught exceptions, rather than at the creation of the `Error`
object, if there is any.
This option is not enabled by default because it may affect garbage collection
behavior negatively.

Anna Henningsen [#30025](#30025).

___

The `--disallow-code-generation-from-strings` V8 CLI flag is now whitelisted in
the `NODE_OPTIONS` environment variable.

Shelley Vohr [#30094](#30094).

New crypto APIs

For DSA and ECDSA, a new signature encoding is now supported in addition to the
existing one (DER). The `verify` and `sign` methods accept a `dsaEncoding`
option, which can have one of two values:

* `'der'` (default): DER-encoded ASN.1 signature structure encoding `(r, s)`.
* `'ieee-p1363'`: Signature format `r || s` as proposed in IEEE-P1363.

Tobias Nießen [#29292](#29292).

___

A new method was added to `Hash`: `Hash.prototype.copy`. It makes it possible to
clone the internal state of a `Hash` object into a new `Hash` object, allowing
to compute the digest between updates.

Ben Noordhuis [#29910](#29910).

Dependency updates

libuv was updated to 1.34.0. This includes fixes to `uv_fs_copyfile()` and
`uv_interface_addresses()` and adds two new functions: `uv_sleep()` and
`uv_fs_mkstemp()`.

Colin Ihrig [#30783](#30783).

___

V8 was updated to 7.8.279.23. This includes performance improvements to object
destructuring, RegExp match failures and WebAssembly startup time.
The official release notes are available at https://v8.dev/blog/v8-release-78.

Michaël Zasso [#30109](#30109).

New EventEmitter APIs

The new `EventEmitter.on` static method allows to async iterate over events.

Matteo Collina [#27994](#27994).

___

It is now possible to monitor `'error'` events on an `EventEmitter` without
consuming the emitted error by installing a listener using the symbol
`EventEmitter.errorMonitor`.

Gerhard Stoebich [#30932](#30932).

___

Using `async` functions with event handlers is problematic, because it
can lead to an unhandled rejection in case of a thrown exception.

The experimental `captureRejections` option in the `EventEmitter` constructor or
the global setting change this behavior, installing a
`.then(undefined, handler)` handler on the `Promise`. This handler routes the
exception asynchronously to the `Symbol.for('nodejs.rejection')` method if there
is one, or to the `'error'` event handler if there is none.

Setting `EventEmitter.captureRejections = true` will change the default for all
new instances of `EventEmitter`.

This is an experimental feature.

Matteo Collina [#27867](#27867).

Performance Hooks are no longer experimental

The `perf_hooks` module is now considered a stable API.

legendecas [#31101](#31101).

Introduction of experimental WebAssembly System Interface (WASI) support

A new core module, `wasi`, is introduced to provide an implementation of the
[WebAssembly System Interface](https://wasi.dev/) specification.
WASI gives sandboxed WebAssembly applications access to the
underlying operating system via a collection of POSIX-like functions.

This is an experimental feature.

Colin Ihrig [#30258](#30258).

PR-URL: #31691
targos pushed a commit that referenced this pull request Feb 11, 2020
@MylesBorins @targos
2020-02-11, Version 12.16.0 'Erbium' (LTS)
1c11ea4 
Notable changes:

New assert APIs

The `assert` module now provides experimental `assert.match()` and
`assert.doesNotMatch()` methods. They will validate that the first argument is a
string and matches (or does not match) the provided regular expression

This is an experimental feature.

Ruben Bridgewater [#30929](#30929).

Advanced serialization for IPC

The `child_process` and `cluster` modules now support a `serialization` option
to change the serialization mechanism used for IPC. The option can have one of
two values:

* `'json'` (default): `JSON.stringify()` and `JSON.parse()` are used. This is
  how message serialization was done before.
* `'advanced'`: The serialization API of the `v8` module is used. It is based on
  the HTML structured clone algorithm.
  and is able to serialize more built-in JavaScript object types, such as
  `BigInt`, `Map`, `Set` etc. as well as circular data structures.

Anna Henningsen [#30162](#30162).

CLI flags

The new `--trace-exit` CLI flag makes Node.js print a stack trace whenever the
Node.js environment is exited proactively (i.e. by invoking the `process.exit()`
function or pressing Ctrl+C).

legendecas [#30516](#30516).

___

The new `--trace-uncaught` CLI flag makes Node.js print a stack trace at the
time of throwing uncaught exceptions, rather than at the creation of the `Error`
object, if there is any.
This option is not enabled by default because it may affect garbage collection
behavior negatively.

Anna Henningsen [#30025](#30025).

___

The `--disallow-code-generation-from-strings` V8 CLI flag is now whitelisted in
the `NODE_OPTIONS` environment variable.

Shelley Vohr [#30094](#30094).

New crypto APIs

For DSA and ECDSA, a new signature encoding is now supported in addition to the
existing one (DER). The `verify` and `sign` methods accept a `dsaEncoding`
option, which can have one of two values:

* `'der'` (default): DER-encoded ASN.1 signature structure encoding `(r, s)`.
* `'ieee-p1363'`: Signature format `r || s` as proposed in IEEE-P1363.

Tobias Nießen [#29292](#29292).

___

A new method was added to `Hash`: `Hash.prototype.copy`. It makes it possible to
clone the internal state of a `Hash` object into a new `Hash` object, allowing
to compute the digest between updates.

Ben Noordhuis [#29910](#29910).

Dependency updates

libuv was updated to 1.34.0. This includes fixes to `uv_fs_copyfile()` and
`uv_interface_addresses()` and adds two new functions: `uv_sleep()` and
`uv_fs_mkstemp()`.

Colin Ihrig [#30783](#30783).

___

V8 was updated to 7.8.279.23. This includes performance improvements to object
destructuring, RegExp match failures and WebAssembly startup time.
The official release notes are available at https://v8.dev/blog/v8-release-78.

Michaël Zasso [#30109](#30109).

New EventEmitter APIs

The new `EventEmitter.on` static method allows to async iterate over events.

Matteo Collina [#27994](#27994).

___

It is now possible to monitor `'error'` events on an `EventEmitter` without
consuming the emitted error by installing a listener using the symbol
`EventEmitter.errorMonitor`.

Gerhard Stoebich [#30932](#30932).

___

Using `async` functions with event handlers is problematic, because it
can lead to an unhandled rejection in case of a thrown exception.

The experimental `captureRejections` option in the `EventEmitter` constructor or
the global setting change this behavior, installing a
`.then(undefined, handler)` handler on the `Promise`. This handler routes the
exception asynchronously to the `Symbol.for('nodejs.rejection')` method if there
is one, or to the `'error'` event handler if there is none.

Setting `EventEmitter.captureRejections = true` will change the default for all
new instances of `EventEmitter`.

This is an experimental feature.

Matteo Collina [#27867](#27867).

Performance Hooks are no longer experimental

The `perf_hooks` module is now considered a stable API.

legendecas [#31101](#31101).

Introduction of experimental WebAssembly System Interface (WASI) support

A new core module, `wasi`, is introduced to provide an implementation of the
[WebAssembly System Interface](https://wasi.dev/) specification.
WASI gives sandboxed WebAssembly applications access to the
underlying operating system via a collection of POSIX-like functions.

This is an experimental feature.

Colin Ihrig [#30258](#30258).

PR-URL: #31691
@targos targos deleted the v8-7.8-v12.x branch October 17, 2020 12:57
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