This adds a new binary block coverage mode (in addition to the existing count
block coverage), as well as a few transformation passes to reduce the number of
uselessly reported ranges.

Bug: v8:6000
Change-Id: I4fb234ca015990d00aa2f1dccb87f76ba4748994
Reviewed-on: https://chromium-review.googlesource.com/552642
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46463}

This piggy-backs on top of existing precise and best-effort coverage to expose
block coverage through the inspector protocol.

Coverage collection now implicitly reports block-granularity coverage when
available.  A new 'isBlockCoverage' property on Inspector's FunctionCoverage
type specifies the granularity of reported coverage.

For now, only count-based block coverage is supported, but binary block
coverage should follow soon.

Support is still gated behind the --block-coverage flag.

Bug: v8:6000
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I9c4d64e1d2a098e66178b3a68dcee800de0081af
Reviewed-on: https://chromium-review.googlesource.com/532975
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46157}

This is consistent with C++ memory model and avoids confusion with GC
write barrier.

BUG=

Review-Url: https://codereview.chromium.org/2912773002
Cr-Commit-Position: refs/heads/master@{#45584}

With precise binary code coverage, the reported count is either 0 or 1.
We only report 1 the first time we collect coverage data after the
function has been executed.

Since we do not care about the accurate execution count, we can optimize
the function once it has been executed once.

Also change best effort coverage to be implicitly binary.

R=caseq@chromium.org, jgruber@chromium.org, pfeldman@chromium.org
BUG=v8:5808

Review-Url: https://codereview.chromium.org/2766573003
Cr-Commit-Position: refs/heads/master@{#44074}

This is in preparation of adding precise binary mode.

BUG=v8:5808

Review-Url: https://codereview.chromium.org/2765813002
Cr-Commit-Position: refs/heads/master@{#43974}

R=caseq@chromium.org, pfeldman@chromium.org
BUG=v8:5808

Review-Url: https://codereview.chromium.org/2741653003
Cr-Commit-Position: refs/heads/master@{#43710}

R=caseq@chromium.org, pfeldman@chromium.org
BUG=v8:5808

Review-Url: https://codereview.chromium.org/2733783002
Cr-Commit-Position: refs/heads/master@{#43662}

R=dgozman@chromium.org, pfeldman@chromium.org
BUG=v8:5808

Review-Url: https://codereview.chromium.org/2715833003
Cr-Commit-Position: refs/heads/master@{#43426}

Now we don't need to call collectSample on each V8StackTraceImpl::capture during collecting profile.

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
BUG=none
R=alph@chromium.org,dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2510823002
Cr-Commit-Position: refs/heads/master@{#41051}

BUG=none
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2473563002
Cr-Commit-Position: refs/heads/master@{#40688}

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

Review-Url: https://codereview.chromium.org/2343733002
Cr-Commit-Position: refs/heads/master@{#39727}

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

Review-Url: https://codereview.chromium.org/2338413003
Cr-Commit-Position: refs/heads/master@{#39608}

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

Review-Url: https://codereview.chromium.org/2332243002
Cr-Commit-Position: refs/heads/master@{#39506}

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

Review-Url: https://codereview.chromium.org/2340763003
Cr-Commit-Position: refs/heads/master@{#39453}

BUG=chromium:635948

Review-Url: https://codereview.chromium.org/2323273002
Cr-Commit-Position: refs/heads/master@{#39314}

- inspector becomes a dependency of v8_base;
- generated public protocol files are placed to gen/v8/include/inspector/<Domain.h>;
- added v8_enable_inspector_override to be used in embedders (gn only);
- combined public headers into v8-inspector.h and v8-inspector-protocol.h.

BUG=chromium:635948

Review-Url: https://codereview.chromium.org/2292053003
Cr-Commit-Position: refs/heads/master@{#39226}

Attempt #2, formatted and disabled lint for src/inspector.

BUG=chromium:635948
NOPRESUBMIT=true (for grammar check in license code)

Review-Url: https://codereview.chromium.org/2292573002
Cr-Commit-Position: refs/heads/master@{#39107}

Revert of [inspector] Initial import of v8_inspector. (patchset #3 id:40001 of https://codereview.chromium.org/2292573002/ )

Reason for revert:
Presubmit

Original issue's description:
> [inspector] Initial import of v8_inspector.
>
> BUG=chromium:635948
> NOPRESUBMIT=true (for code style)
>
> Committed: https://crrev.com/e29594ea3c5c41de0844e71f7a82c990a8da71ee
> Cr-Commit-Position: refs/heads/master@{#39057}

TBR=jochen@chromium.org,pfeldman@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:635948

Review-Url: https://codereview.chromium.org/2300823002
Cr-Commit-Position: refs/heads/master@{#39058}

BUG=chromium:635948
NOPRESUBMIT=true (for code style)

Review-Url: https://codereview.chromium.org/2292573002
Cr-Commit-Position: refs/heads/master@{#39057}