Reland [Tracing] V8 Tracing Controller

Reland [Tracing] V8 Tracing Controller

V8 has had a trace event macro interface for while, but without a tracing
controller a standalone V8 would be unable to collect traces.

This CL introduces a complete Tracing Controller system for V8.
It is fully function except that it does not yet store trace event args.

This CL has a few components,
The tracing controller itself, contributed by the author of this CL
The Trace config (including the parser), contributed by lpy@
The Trace Object, Trace Writer, and Trace Buffer are all contributed by rksang@

BUG=v8:4561
LOG=N

The original CL was failing the V8 Arm Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Arm%20-%20builder/builds/2456
and the V8 Mips Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder/builds/2506

The failure is due to undefined behavior of CHECK_EQ of 2 const char*

Fix in patch #1

Committed: https://crrev.com/3d598452679ce208ad9b2f48e0fb3fae352ce375
Cr-Commit-Position: refs/heads/master@{#38073}

patch from issue 2137013006 at patchset 200001 (http://crrev.com/2137013006#ps200001)

Committed: https://crrev.com/821c3e563ca33044e5cac2bc359f973944436b76
Cr-Commit-Position: refs/heads/master@{#38104}

[fmeawad, 2016-07-27 15:24:32]

Description was changed from

==========
Reland [Tracing] V8 Tracing Controller

V8 has had a trace event macro interface for while, but without a tracing
controller a standalone V8 would be unable to collect traces.

This CL introduces a complete Tracing Controller system for V8.
It is fully function except that it does not yet store trace event args.

This CL has a few components,
The tracing controller itself, contributed by the author of this CL
The Trace config (including the parser), contributed by lpy@
The Trace Object, Trace Writer, and Trace Buffer are all contributed by rksang@

BUG=v8:4561
LOG=N

The original CL was failing the V8 Arm Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Arm%20-%20builder/...
and the V8 Mips Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder...

The failure is due to undefined behavior of CHECK_EQ of 2 const char*

Committed: https://crrev.com/3d598452679ce208ad9b2f48e0fb3fae352ce375
Cr-Commit-Position: refs/heads/master@{#38073}

patch from issue 2137013006 at patchset 200001
(http://crrev.com/2137013006#ps200001)
==========

to

==========
Reland [Tracing] V8 Tracing Controller

V8 has had a trace event macro interface for while, but without a tracing
controller a standalone V8 would be unable to collect traces.

This CL introduces a complete Tracing Controller system for V8.
It is fully function except that it does not yet store trace event args.

This CL has a few components,
The tracing controller itself, contributed by the author of this CL
The Trace config (including the parser), contributed by lpy@
The Trace Object, Trace Writer, and Trace Buffer are all contributed by rksang@

BUG=v8:4561
LOG=N

The original CL was failing the V8 Arm Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Arm%20-%20builder/...
and the V8 Mips Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder...

The failure is due to undefined behavior of CHECK_EQ of 2 const char*

Fix in patch #1

Committed: https://crrev.com/3d598452679ce208ad9b2f48e0fb3fae352ce375
Cr-Commit-Position: refs/heads/master@{#38073}

patch from issue 2137013006 at patchset 200001
(http://crrev.com/2137013006#ps200001)
==========

[fmeawad, 2016-07-27 15:25:37]

fmeawad@chromium.org changed reviewers:
+ jochen@chromium.org, lpy@chromium.org, mattloring@google.com,
ofrobots@google.com, rskang@google.com, yangguo@chromium.org

[fmeawad, 2016-07-27 15:25:48]

The CQ bit was checked by fmeawad@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-07-27 15:25:54]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-27 15:46:41]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-07-27 15:46:42]

Dry run: This issue passed the CQ dry run.

[fmeawad, 2016-07-27 15:53:45]

PTAL.

[mattloring, 2016-07-27 16:07:21]

On 2016/07/27 15:53:45, fmeawad wrote:
> PTAL.

lgtm

[jochen (gone - plz use gerrit), 2016-07-27 16:12:18]

lgtm

[fmeawad, 2016-07-27 16:19:24]

The CQ bit was checked by fmeawad@chromium.org

[commit-bot: I haz the power, 2016-07-27 16:19:32]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-27 16:21:24]

Description was changed from

==========
Reland [Tracing] V8 Tracing Controller

V8 has had a trace event macro interface for while, but without a tracing
controller a standalone V8 would be unable to collect traces.

This CL introduces a complete Tracing Controller system for V8.
It is fully function except that it does not yet store trace event args.

This CL has a few components,
The tracing controller itself, contributed by the author of this CL
The Trace config (including the parser), contributed by lpy@
The Trace Object, Trace Writer, and Trace Buffer are all contributed by rksang@

BUG=v8:4561
LOG=N

The original CL was failing the V8 Arm Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Arm%20-%20builder/...
and the V8 Mips Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder...

The failure is due to undefined behavior of CHECK_EQ of 2 const char*

Fix in patch #1

Committed: https://crrev.com/3d598452679ce208ad9b2f48e0fb3fae352ce375
Cr-Commit-Position: refs/heads/master@{#38073}

patch from issue 2137013006 at patchset 200001
(http://crrev.com/2137013006#ps200001)
==========

to

==========
Reland [Tracing] V8 Tracing Controller

V8 has had a trace event macro interface for while, but without a tracing
controller a standalone V8 would be unable to collect traces.

This CL introduces a complete Tracing Controller system for V8.
It is fully function except that it does not yet store trace event args.

This CL has a few components,
The tracing controller itself, contributed by the author of this CL
The Trace config (including the parser), contributed by lpy@
The Trace Object, Trace Writer, and Trace Buffer are all contributed by rksang@

BUG=v8:4561
LOG=N

The original CL was failing the V8 Arm Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Arm%20-%20builder/...
and the V8 Mips Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder...

The failure is due to undefined behavior of CHECK_EQ of 2 const char*

Fix in patch #1

Committed: https://crrev.com/3d598452679ce208ad9b2f48e0fb3fae352ce375
Cr-Commit-Position: refs/heads/master@{#38073}

patch from issue 2137013006 at patchset 200001
(http://crrev.com/2137013006#ps200001)
==========

[commit-bot: I haz the power, 2016-07-27 16:21:25]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-27 16:22:04]

Description was changed from

==========
Reland [Tracing] V8 Tracing Controller

V8 has had a trace event macro interface for while, but without a tracing
controller a standalone V8 would be unable to collect traces.

This CL introduces a complete Tracing Controller system for V8.
It is fully function except that it does not yet store trace event args.

This CL has a few components,
The tracing controller itself, contributed by the author of this CL
The Trace config (including the parser), contributed by lpy@
The Trace Object, Trace Writer, and Trace Buffer are all contributed by rksang@

BUG=v8:4561
LOG=N

The original CL was failing the V8 Arm Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Arm%20-%20builder/...
and the V8 Mips Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder...

The failure is due to undefined behavior of CHECK_EQ of 2 const char*

Fix in patch #1

Committed: https://crrev.com/3d598452679ce208ad9b2f48e0fb3fae352ce375
Cr-Commit-Position: refs/heads/master@{#38073}

patch from issue 2137013006 at patchset 200001
(http://crrev.com/2137013006#ps200001)
==========

to

==========
Reland [Tracing] V8 Tracing Controller

V8 has had a trace event macro interface for while, but without a tracing
controller a standalone V8 would be unable to collect traces.

This CL introduces a complete Tracing Controller system for V8.
It is fully function except that it does not yet store trace event args.

This CL has a few components,
The tracing controller itself, contributed by the author of this CL
The Trace config (including the parser), contributed by lpy@
The Trace Object, Trace Writer, and Trace Buffer are all contributed by rksang@

BUG=v8:4561
LOG=N

The original CL was failing the V8 Arm Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Arm%20-%20builder/...
and the V8 Mips Builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder...

The failure is due to undefined behavior of CHECK_EQ of 2 const char*

Fix in patch #1

Committed: https://crrev.com/3d598452679ce208ad9b2f48e0fb3fae352ce375
Cr-Commit-Position: refs/heads/master@{#38073}

patch from issue 2137013006 at patchset 200001
(http://crrev.com/2137013006#ps200001)

Committed: https://crrev.com/821c3e563ca33044e5cac2bc359f973944436b76
Cr-Commit-Position: refs/heads/master@{#38104}
==========

[commit-bot: I haz the power, 2016-07-27 16:22:05]

Patchset 2 (id:??) landed as
https://crrev.com/821c3e563ca33044e5cac2bc359f973944436b76
Cr-Commit-Position: refs/heads/master@{#38104}