deps: cherry-pick d9fbfeb from upstream V8

[kjin]

Original commit message:

inspector: return [[StableObjectId]] as internal property
This property might be useful for fast '===' check.
R=dgozman@chromium.org,yangguo@chromium.org
Bug: none
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;luci.chromium.try:linux_chromium_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Iabc3555ce1ec2c14cf0ccd40b7d964ae144e7352
Reviewed-on: https://chromium-review.googlesource.com/1226411
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56095}

This commit allows us to determine the structure of circular objects through inspector (before, there was no surefire way to know if you entered an infinite loop while recursively iterating through an object's properties, because each object returned through the inspector was given a unique, monotonically increasing ID.

Hopefully, this change can make it into v10 and v11 at the very least.

cc/ @ak239@ofrobots

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[richardlau]

This doesn't look right... 7.0.276.29 is: v8/v8@7.0.276.28...7.0.276.29

Please follow https://github.com/nodejs/node/blob/master/doc/guides/maintaining-V8.md#maintenance-process for backports. If V8 7.0 is an abandoned branch, then bump the v8_embedder_string number in common.gypi.

cc @nodejs/v8

[kjin]

Oops, not sure why I thought this was the number to increment. I've changed it back and incremented the patch level in common.gypi.

I think @ak239 mentioned to me in the past that it would be better not to land this on V8 7.0.

[refack]

RSLGTM

[refack]

Let's see if this needs changes to node's test suite as well:
PR CI: https://ci.nodejs.org/job/node-test-pull-request/18177/
V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/1791/

[refack]

Fails across the board for the V8 CI, e.g. https://ci.nodejs.org/job/node-test-commit-v8-linux/1791/nodes=benchmark,v8test=v8test/testReport/junit/(root)/v8tests/inspector_runtime_stable_object_id/

Failed: v8tests.inspector/runtime/stable-object-id
Stacktrace
stdout:
Checks that protocol returns the same RemoteObjectId for the same object
Running test: testGlobal
Compare global evaluated twice: true
Running test: testObject
Compare object evaluated twice: true
Running test: testObjectInArray
Compare first and second element: true
Running test: testObjectOnPause
Compare global and this: true
Compare global and global on pause: false
Compare a and a on pause: true
Command: /home/iojs/build/workspace/node-test-commit-v8-linux/nodes/benchmark/v8test/v8test/deps/v8/out.gn/x64.release/inspector-test /home/iojs/build/workspace/node-test-commit-v8-linux/nodes/benchmark/v8test/v8test/deps/v8/test/inspector/protocol-test.js /home/iojs/build/workspace/node-test-commit-v8-linux/nodes/benchmark/v8test/v8test/deps/v8/test/inspector/runtime/stable-object-id.js --random-seed=-1778458991 --nohard-abort

[kjin]

@ak239 do you know why these tests might be failing? Is there a pre-requisite change that would also need to get floated?

[Trott]

Is work ongoing with this? (If so, it could use a rebase to get rid of the merge conflict.)

[alexkozy]

@kjin I missed this PR, feel free to ping me using email next time.
I believe that issue here is that v8 does not contain my another patch. Feel free to remove this line from test output: Compare global and global on pause and merge this PR.

[kjin]

@ak239 Thanks for the update! I'll go ahead and do so.

[kjin]

@Trott@refack I've rebased and removed the failing test as per @ak239's instructions. Not sure if Travis CI represents the extent of CI needed but it seems like it is green.

[refack]

Not sure if Travis CI represents the extent of CI needed but it seems like it is green.

Travis is just quick sanity, we need validation from out CI cluster:
PR CI: https://ci.nodejs.org/job/node-test-pull-request/18427/
V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/1826/

[kjin]

Seems like there was a line I forgot to change. @refack, would you mind running it again? Also, do you know how I can run the V8 tests locally?

[refack]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/1827/

[refack]

Also, do you know how I can run the V8 tests locally?

If you look at the few first lines of the CI's console output
You'll see:

./configure
make -j 8 test-v8 V=1 DESTCPU=x64 ARCH=x64.release ENABLE_V8_TAP=True V8_EXTRA_TEST_OPTIONS=--progress=dots --timeout=120

Most importantly is make test-v8. Just FYI it pulls the test tooling from the V8 repo with depot_tools.

[kjin]

@refack@ryzokuken@jasnell I believe this is ready to be landed... (pushes have just been to upgrade the V8 embedder string in common.gypi)

[kjin]

Seems like landing V8 7.1 on master has superseded this PR... closing.