Previously we used the start address of the AbstractCode object. This
doesn't make sense for off-heap builtins, where the code isn't contained
in the object itself. It also hides other potential problems - sometimes
the sample.pc is inside the AbstractCode object header - this is
never valid.

There were a few changes necessary to make this happen:
  - Change the interface of CodeMoveEvent. Now 'to' and 'from' are both
    AbstractCode objects, which is nice because many users were taking
    'to' and adding the header offset to it to try and find the
    instruction start address. This isn't valid for off-heap builtins.
  - Fix a bug in CodeMap::MoveCode where we didn't update the CodeEntry
    object to reflect the new instruction_start.
  - Rename the 'start' field in all of the CodeEventRecord sub-classes
    to make it clear that this is the address of the first instruction.
  - Fix the confusion in RecordTickSample between 'tos' and 'pc' which
    caused pc_offset to be calculated incorrectly.

Bug: v8:7983
Change-Id: I3e9dddf74e4b2e96a5f031d216ef7008d6f184d1
Reviewed-on: https://chromium-review.googlesource.com/1148457
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54749}

Replace all uses of Deoptimizer::BailoutType and CodeEventListener::DeoptKind
with DeoptimizeKind from src/globals.h.

Change-Id: I5b9002583a69bc43d995cacc7619b018e5a70727
Reviewed-on: https://chromium-review.googlesource.com/1097331
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53695}

Introduce a new public API called CodeEventListener to allow embedders
to better support external profilers and other diagnostic tools without
relying on unsupported methods like --perf-basic-prof.

Bug: v8:7694
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I063cc965394d59401358757634c9ea84c11517e9
Co-authored-by: Daniel Beckert <daniel@sthima.com.br>
Reviewed-on: https://chromium-review.googlesource.com/1028770
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53382}

Before Turbofan/Ignition it was possible to use external profilers to
sample running V8/Node.js processes and generate reports/FlameGraphs
from that. It's still possible to do so, but non-optimized JavaScript
functions appear in the stack as InterpreterEntryTrampoline. This commit
adds a runtime flag which makes interpreted frames visible on the
process' native stack as distinguishable functions, making the sampled
data gathered by external profilers such as Linux perf and DTrace more
useful.

R=bmeurer@google.com, franzih@google.com, jarin@google.com, yangguo@google.com

Bug: v8:7155
Change-Id: I3dc8876aa3cd9f1b9766624842a7cc354ccca415
Reviewed-on: https://chromium-review.googlesource.com/959081
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52533}

Delaying the logging until after module creating ensures that the
module has been fully parsed and hence that all names are available.

Also refactors the code to bring all code logging/disassembling into
one place.

Change-Id: I8219d70876d2ccd3a5ffb8250b46fdf60a46fe6c
Reviewed-on: https://chromium-review.googlesource.com/973443Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52146}

It turns out that with the help of Code::Instruction{Start,End,Size}
helpers, we don't need custom profiler methods.

InstructionStream is now all-static.

Bug: v8:6666
Change-Id: I59e1d2d2cb72c128725a1ed03f11506d40e76224
Reviewed-on: https://chromium-review.googlesource.com/947973
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51837}

Adds support for generating logging/profiling event when wasm code gets compiled
on the native heap. As code objects on the native heap are not ordinary heap
objects, the existing abstractions for reporting cannot be used. Instead, add
specialized versions for WasmCode objects.

Change-Id: I808618d70142073b3c1b06edef6931f59bed8cf5
Reviewed-on: https://chromium-review.googlesource.com/913308
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51388}

Bug: v8:6666
Change-Id: I8de39b6ce31b59e5a76267cb665d42f758309c2a
Reviewed-on: https://chromium-review.googlesource.com/897530Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51093}

R=jgruber@chromium.org

Change-Id: I5748dcf1456a19be66058b1b7025da44bcbd999c
Reviewed-on: https://chromium-review.googlesource.com/725735
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48737}

Bug: 
Change-Id: I41d3f3086f5e90a1a1579c18eca59b5d098f637f
Reviewed-on: https://chromium-review.googlesource.com/690374
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48207}

The former will handle stores to global variables, lets and undeclared
variables. The latter will handle named stores to explicit receiver.

BUG=chromium:576312, v8:5561

Change-Id: I335fa21db47c3d001da8cc79fa8cb6f8abcbb7e2
Reviewed-on: https://chromium-review.googlesource.com/458639Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44085}

This adds optimization and deoptimization counts to the Web UI. Also, the function timeline
now shows optimization and deoptimization marks.

Review-Url: https://codereview.chromium.org/2753543006
Cr-Commit-Position: refs/heads/master@{#44033}

BUG=chromium:664286

Review-Url: https://codereview.chromium.org/2595673002
Cr-Commit-Position: refs/heads/master@{#41884}

BUG=406277

Review-Url: https://codereview.chromium.org/2321073004
Cr-Commit-Position: refs/heads/master@{#39853}

The patch introduces a dedicated dispatching class for JIT code events. It is
set as a helper on the isolate.
This allows classes across v8 to break their dependency on Logger and CpuProfiler.
These two became just regular clients of the dispatcher.

BUG=v8:4789

Review-Url: https://codereview.chromium.org/2061623002
Cr-Commit-Position: refs/heads/master@{#37005}