A couple of customers have asked about using devtools to get information
about temporary allocations, with the goal of reducing GC time and/or
peak memory usage. Currently, the sampling heap profiler reports only
objects which are still alive at the end of the profiling session. In
this change, I propose adding configuration options when starting the
sampling heap profiler so that it can optionally include information
about objects which were discarded by the GC before the end of the
profiling session. A user could run the sampling heap profiler in
several different modes depending on their goals:
1. To find memory leaks or determine which functions contribute most to
steady-state memory consumption, the current default mode is best.
2. To find functions which cause large temporary memory spikes or large
GC pauses, the user can request data about both live objects and
those collected by major GC.
3. To tune for minimal GC activity in latency-sensitive applications
like real-time audio processing, the user can request data about
every allocation, including objects collected by major or minor GC.
4. I'm not sure why anybody would want data about objects collected by
minor GC and not objects collected by major GC, but it's also a valid
flags combination.
Change-Id: If55d5965a1de04fed3ae640a02ca369723f64fdf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3868522
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#83202}
"Function:" and "LazyCompile:" are confusing by now and use up too
much space.# Enter a description of the change.
This also changes the function names visible when using linux-perf
Change-Id: Ib2d4b7df39068c27b5b06db578fc550d2973ebb4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3693705
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81161}
Anyone using CopyablePersistentTraits should be using v8::Global, so
deprecate it and fix the uses in V8.
Bug: v8:12915
Change-Id: I25e6f2a03e070db9e9af9bbd9ea8cbc0f838c5ac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3669254
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81001}
- Repurpose flag `treat_global_objects_as_roots` when taking a heap
snapshot for toggling whether internals should be exposed (to
`hide_internals`).
- Use the toggle in creating heap snapshots for exposing class names
as object names for C++ objects that have not explicitly been given a
name.
Change-Id: I77d71babfdfe53269964fe81ed985037a431c28b
Bug: chromium:1321620
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3623740
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80391}
One of the biggest categories in heap snapshots is named “(system)”,
which gives developers no indication of why all that memory is used or
what they might do to reduce it. In this change, I propose that we
create a new category for Maps, DescriptorArrays, and related objects,
and call this new category “(object shape)” in the devtools. I think
that this category name would be more meaningful, while still grouping
those objects together so that they mostly stay out of the way.
Bug: v8:12769
Doc: https://docs.google.com/document/d/1a-6V_2LIJuRcsppwh6E18g8OSnC9j6gN4ao2gq--BiU
Change-Id: I282a7b87c34ca6ed371ff32f3c7332d794ae42ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3587974
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#80123}
This CL adds support for interacting with CpuProfile with their integer
id.
A String ID is problematic because it forces an allocation when stopping
or cancelling a Profiler which can happen during a GC when this
is not allowed.
Change-Id: I9a8e754bd67214be0bbc5ca051bcadf52bf71a68
Bug: chromium:1297283
Co-Authored-By: Nicolas Dubus <nicodubus@fb.com>
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3522896
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Auto-Submit: Corentin Pescheloche <cpescheloche@fb.com>
Commit-Queue: Corentin Pescheloche <cpescheloche@fb.com>
Cr-Commit-Position: refs/heads/main@{#79835}
CpuProfiler includes logic tracing that is only relevant in
the context of TracingCpuProfiler.
Adds a setting to disable tracing for SamplingCpuProfiler.
Change-Id: Idcac03dd3f368b5fcd48a532d5cfe60966a64003
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3433219
Auto-Submit: Corentin Pescheloche <cpescheloche@fb.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79190}
This is a reland of 2d087f237e
The changes are :
* Fix redundant reinterpret_cast in test file for MSVC failure
https://crbug.com/v8/12476
* Fix flaky test
https://crbug.com/v8/12475
If a sample is captured during a GC, no embedder context is obtained
defaulting to EMPTY. This is the expected behavior, made it in clear
in implementation and in test.
* Synchronized the embedder context filter behavior with existing
native context filter.
Original change's description:
> Add APIs to surface VMState and new EmbedderState to CpuProfile samples.
>
> EmbedderState:
> * An EmbedderState is defined as a value uint8_t and a v8::context used
> for filtering.
> * EmbedderStates are stack allocated by the embedder, construction and
> destruction set/unset the state to the isolate thread local top.
> * A v8::context is used to filter states that are added to a CpuProfile,
> if the CpuProfile do not have a ContextFilter set or if contexts do not
> match, state defaults to Empty.
>
> * v8:StateTag is already propagated all the way to a Sample, simply add
> an API to surface it.
>
> VMState:
> Change-Id: I7eed08907360b99b0ad20ddcff59c95c7076c85e
> Bug: chromium:1263871
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3188072
> Auto-Submit: Corentin Pescheloche <cpescheloche@fb.com>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Commit-Queue: Camillo Bruni <cbruni@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#78250}
Bug: chromium:1263871
Change-Id: Ief891b05da99c695e9fb70f94ed7ebdecc6c3b7b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3320037
Auto-Submit: Corentin Pescheloche <cpescheloche@fb.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78281}
This reverts commit 2d087f237e.
Reason for revert:
- Causing MSVC build failures: https://crbug.com/v8/12476
- Causing flaky failures: https://crbug.com/v8/12475
Original change's description:
> [profiler] Surface VM & Embedder State
>
> Add APIs to surface VMState and new EmbedderState to CpuProfile samples.
>
> EmbedderState:
> * An EmbedderState is defined as a value uint8_t and a v8::context used
> for filtering.
> * EmbedderStates are stack allocated by the embedder, construction and
> destruction set/unset the state to the isolate thread local top.
> * A v8::context is used to filter states that are added to a CpuProfile,
> if the CpuProfile do not have a ContextFilter set or if contexts do not
> match, state defaults to Empty.
>
> * v8:StateTag is already propagated all the way to a Sample, simply add
> an API to surface it.
>
> VMState:
> Change-Id: I7eed08907360b99b0ad20ddcff59c95c7076c85e
> Bug: chromium:1263871
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3188072
> Auto-Submit: Corentin Pescheloche <cpescheloche@fb.com>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Commit-Queue: Camillo Bruni <cbruni@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#78250}
Bug: chromium:1263871, v8:12475, v8:12476
Change-Id: I02670b1ed3bb863033208369227642a7419fce00
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3315444
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78256}
Add APIs to surface VMState and new EmbedderState to CpuProfile samples.
EmbedderState:
* An EmbedderState is defined as a value uint8_t and a v8::context used
for filtering.
* EmbedderStates are stack allocated by the embedder, construction and
destruction set/unset the state to the isolate thread local top.
* A v8::context is used to filter states that are added to a CpuProfile,
if the CpuProfile do not have a ContextFilter set or if contexts do not
match, state defaults to Empty.
* v8:StateTag is already propagated all the way to a Sample, simply add
an API to surface it.
VMState:
Change-Id: I7eed08907360b99b0ad20ddcff59c95c7076c85e
Bug: chromium:1263871
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3188072
Auto-Submit: Corentin Pescheloche <cpescheloche@fb.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78250}
A test was overflowing on the progress counter when using int as type.
This CL is fixing the progress counter to use uint32_t, and re-enables
the test.
Why uint32_t instead of size_t?
In the referenced bug, the progress_counter_ (but not the
progress_total_) triggered an overflow; and since these two counters
should be relatively similar (the total count is an estimate, and can
be less than the actual progress count), we do not expect the
count to increase much more than we can already encode with int.
Bug: chromium:1246860
Change-Id: I9769884ef60d352b3787c2223e528ddf33b0b23e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3245116
Commit-Queue: Kim-Anh Tran <kimanh@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77551}
This is a reland of d1b27019d3
Fixes include:
Adding missing file to bazel build
Forward-declaring classing before friend-classing them to fix win/gcc
Add missing v8-isolate.h include for vtune builds
Original change's description:
> [include] Split out v8.h
>
> This moves every single class/function out of include/v8.h into a
> separate header in include/, which v8.h then includes so that
> externally nothing appears to have changed.
>
> Every include of v8.h from inside v8 has been changed to a more
> fine-grained include.
>
> Previously inline functions defined at the bottom of v8.h would call
> private non-inline functions in the V8 class. Since that class is now
> in v8-initialization.h and is rarely included (as that would create
> dependency cycles), this is not possible and so those methods have been
> moved out of the V8 class into the namespace v8::api_internal.
>
> None of the previous files in include/ now #include v8.h, which means
> if embedders were relying on this transitive dependency then it will
> give compile failures.
>
> v8-inspector.h does depend on v8-scripts.h for the time being to ensure
> that Chrome continue to compile but that change will be reverted once
> those transitive #includes in chrome are changed to include it directly.
>
> Full design:
> https://docs.google.com/document/d/1rTD--I8hCAr-Rho1WTumZzFKaDpEp0IJ8ejZtk4nJdA/edit?usp=sharing
>
> Bug: v8:11965
> Change-Id: I53b84b29581632710edc80eb11f819c2097a2877
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3097448
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76424}
Cq-Include-Trybots: luci.v8.try:v8_linux_vtunejit
Bug: v8:11965
Change-Id: I99f5d3a73bf8fe25b650adfaf9567dc4e44a09e6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3113629
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76460}
This reverts commit d1b27019d3.
Reason for revert: Broke vtune build, tsan build and possibly others
Original change's description:
> [include] Split out v8.h
>
> This moves every single class/function out of include/v8.h into a
> separate header in include/, which v8.h then includes so that
> externally nothing appears to have changed.
>
> Every include of v8.h from inside v8 has been changed to a more
> fine-grained include.
>
> Previously inline functions defined at the bottom of v8.h would call
> private non-inline functions in the V8 class. Since that class is now
> in v8-initialization.h and is rarely included (as that would create
> dependency cycles), this is not possible and so those methods have been
> moved out of the V8 class into the namespace v8::api_internal.
>
> None of the previous files in include/ now #include v8.h, which means
> if embedders were relying on this transitive dependency then it will
> give compile failures.
>
> v8-inspector.h does depend on v8-scripts.h for the time being to ensure
> that Chrome continue to compile but that change will be reverted once
> those transitive #includes in chrome are changed to include it directly.
>
> Full design:
> https://docs.google.com/document/d/1rTD--I8hCAr-Rho1WTumZzFKaDpEp0IJ8ejZtk4nJdA/edit?usp=sharing
>
> Bug: v8:11965
> Change-Id: I53b84b29581632710edc80eb11f819c2097a2877
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3097448
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76424}
Bug: v8:11965
Change-Id: Id57313ae992e720c8b19abc975cd69729e1344aa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3113627
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Owners-Override: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76428}
This moves every single class/function out of include/v8.h into a
separate header in include/, which v8.h then includes so that
externally nothing appears to have changed.
Every include of v8.h from inside v8 has been changed to a more
fine-grained include.
Previously inline functions defined at the bottom of v8.h would call
private non-inline functions in the V8 class. Since that class is now
in v8-initialization.h and is rarely included (as that would create
dependency cycles), this is not possible and so those methods have been
moved out of the V8 class into the namespace v8::api_internal.
None of the previous files in include/ now #include v8.h, which means
if embedders were relying on this transitive dependency then it will
give compile failures.
v8-inspector.h does depend on v8-scripts.h for the time being to ensure
that Chrome continue to compile but that change will be reverted once
those transitive #includes in chrome are changed to include it directly.
Full design:
https://docs.google.com/document/d/1rTD--I8hCAr-Rho1WTumZzFKaDpEp0IJ8ejZtk4nJdA/edit?usp=sharing
Bug: v8:11965
Change-Id: I53b84b29581632710edc80eb11f819c2097a2877
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3097448
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76424}
cpplint rules change over time, and we change the exact rules we enable
for v8. This CL removes NOLINT annotations which are not needed
according to the currently enabled rules.
R=mlippautz@chromium.org
Bug: v8:11717
Change-Id: I41c4c18dd3f70ec255e9d2769ffd25a38f6f2784
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2862764
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74307}
As we can still intend to run the web-exposed profiler outside of an
origin-isolated environment, add support back for filtering by
v8::Context.
This reverts commit 05af368100.
Bug: chromium:956688
Change-Id: Idd98bea3213b5963f689a04de6c3743073efc587
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2785806
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#74112}
- represent smis as fake heap numbers
- numbers nodes (both smi and heap numbers) reference a child node whose
name is "value" and whose entry is the string representation of that
number
That feature is disabled by default, and can be enabled by passing
captureNumericValue: true when calling HeapProfiler.takeHeapSnapshot
This patch slightly refactors some functions that operate on "essential
objects". We now check that the object is essential before trying to
create the entry. Otherwise, we would end up with smi objects created,
but not referenced anywhere.
Design doc:
https://docs.google.com/document/d/1Qh1zxyn0SS5wzJzitD6ecBJTdFbQkJogSMwxDRsn44o/edit
Change-Id: Ibbe6e79a54c4f9eace72bc0a0ccb622a97698e00
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2806747
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Arnaud Renevier <arenevier@fb.com>
Cr-Commit-Position: refs/heads/master@{#73985}
samples being discarded
- Passed in as CpuProfilingOptions parameter, client is responsible for
determining if function is still safe to execute. Includes unit tests
- Client (blink) side CR: https://chromium-review.googlesource.com/c/chromium/src/+/2649617,
- Client (blink) side CR requires this to be pushed prior to it being pushed
Change-Id: I3ef4640186115d4e14c1b73f902c889c776e310f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2652206
Commit-Queue: Nicolas Dubus <nicodubus@fb.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72794}
This is a reland of e68285e21d
Failing wasm tests seemed to recover on their own.
Original change's description:
> cppgc-js: heap snapshot: Add logic for querying detachedness
>
> Adds infrastructure to allow embedders specifying a detachedness state
> that is queried when encountering an object with a TraceReference that
> has a non-zero wrapper class id set.
>
> Change-Id: Ie7f2f253544ee25a25565eb08d82e9df5f0a74d2
> Bug: chromium:1056170
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2502345
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70841}
Bug: chromium:1056170
Change-Id: I293a9d38f841b4d0faa4af7408bb57544f11d566
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2505713
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70867}
This reverts commit e68285e21d.
Reason for revert: ASAN test failing:
https://ci.chromium.org/p/v8/builders/ci/V8%20Mac64%20ASAN/29838?
Original change's description:
> cppgc-js: heap snapshot: Add logic for querying detachedness
>
> Adds infrastructure to allow embedders specifying a detachedness state
> that is queried when encountering an object with a TraceReference that
> has a non-zero wrapper class id set.
>
> Change-Id: Ie7f2f253544ee25a25565eb08d82e9df5f0a74d2
> Bug: chromium:1056170
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2502345
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70841}
TBR=ulan@chromium.org,mlippautz@chromium.org,omerkatz@chromium.org
Change-Id: Ic13337b9c5b336a81efa5f2672f5a501084b5326
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2505613
Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70843}
Adds infrastructure to allow embedders specifying a detachedness state
that is queried when encountering an object with a TraceReference that
has a non-zero wrapper class id set.
Change-Id: Ie7f2f253544ee25a25565eb08d82e9df5f0a74d2
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2502345
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70841}
- Created status enum with statuses kStarted, kAlreadyStarted and
kErrorTooManyProfilers, returning when StartProfiling is invoked
- Tests spin up one profiler, check kStarted returned; spin up
another with same name, check kAlreadyStarted returned; Spin up 99
more profilers (100 total), check each returning kStarted, and
one more, expecting 101st to return kErrorTooManyProfilers
R=acomminos@fb.com, petermarshall@chromium.org, ulan@chromium.org
Change-Id: I64e2e6396775f90f9f49f75331a075a47efa7fca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2486240
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70808}
Since the web-exposed profiler will require COOP/COEP, it is no longer
necessary to perform isolation at the V8 level. Strip the unnecessary
complexity and unreliability of context filtering accordingly.
Bug: chromium:956688, v8:9881, v8:9860
Change-Id: I21a30d51f8daf7565ec95de8c265e9d3b9d10fad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2386144
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69894}
Adds a field that can be propagated by embedders. The field holds
the detachedness state of DOM objects but can be used in general
by embedder to indicate which objects are for sure part of interesting
application logic and which objects are not. This field is then
processed properly by the DevTools front end.
Bug: chromium:1110816
Change-Id: I53a172208cd69ce2ba2ed9524d36b6512aae7d30
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2332174
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69780}
The category name changed in https://crrev.com/c/2159690 (in
depot_tools), hence presubmit tests start failing whenever someone
touches a file which still refers to the old category.
R=zhin@chromium.orgTBR=machenbach@chromium.org
No-Try: true
No-Tree-Checks: true
Change-Id: I62813a42d63e512d421c4fe94229d04a56056978
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2165760
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67403}
This CL adds an argument to the heap profiler that allows to control
whether global objects (e.g. 'window' in JavaScript) are treated as
roots in the heap snapshot. Doing so hides blink-internal details and
is often a good choice when user-JS leaks are investigated. Sometimes,
however, this introduces spurious retainer cycles, which are hard to
debug.
Previously, this option was exposed as a V8 flag. The blink
implications of the build-time V8 flag are now available via
the new blink flag `enable_additional_blink_object_names`.
Tbr: hpayer@chromium.org
Bug: chromium:1034504
Change-Id: Ibe9412917ae598a3ff0c3dc956ab0bc179f50a21
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1967387
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65491}
Deprecated in 79.
Change-Id: If0e2b95b4b66328858b33a533454a469c80fad63
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940147
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Auto-Submit: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65204}
Since C++14, there is a spec'ed attribute for deprecation of methods,
functions, types, aliases or anything else.
This CL switches from the GCC __attribute__ to this standard attribute.
This allows to use the V8_DEPRECATED and V8_DEPRECATE_SOON macros on
anything where the standard attribute can be used (including {using}
statements that were not working before). It also avoids the need to
nest the whole declaration in the macro, making the code more readable.
R=adamk@chromium.org
Bug: v8:9810
Change-Id: I7adab7694af75423fb31ade2fc982dbf9c9bc699
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1847361
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64174}
Also report code relocation events through the public CodeEventHandler
API, so that embedders can expose this information to external
profilers, allowing those profilers to correctly translate function
names even after they were relocated.
R=bmeurer@chromium.org, jgruber@chromium.org, yangguo@chromium.org
Change-Id: I8795186f5f5c58ede9054e4b83e2d290d92b6e00
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1802657
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63943}
After https://crrev.com/c/1800575 and https://crrev.com/c/1803343,
which tried to fix this on occuring compile errors, this CL
systematically adds the <memory> include to each header that uses
{std::unique_ptr}.
R=sigurds@chromium.orgTBR=mlippautz@chromium.org,alph@chromium.org,rmcilroy@chromium.org,verwaest@chromium.org
Bug: v8:9396
Change-Id: If7f9c3140842f9543135dddd7344c0f357999da0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1803349
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63767}
We have internal::TickSample which inherits from this, but we never
use the public version in the API despite defining it there.
Change-Id: I6f0ce7ee663ef821be57cfbad540c1660484a525
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1745472
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63329}
Adds support to the CPU profiler for scraping the incumbent contexts of
V8 stack frames. While it is generally unsafe to access heap objects
during a profiling interrupt, the native context is uniquely usable due
to being guaranteed an alive root on the stack, as well as its slots
being immutable after context creation.
Change-Id: I2c3149c1302b74d2f13aa99d1fdd0cf006e0f9d1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1580020
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63258}
- 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}
Implements ProfilerCodeObserver, a class to track the generation and
movement of code on the heap for the lifetime of each CpuProfiler. When
sampling is inactive, logged code is committed directly to the CodeMap.
During profiling, ProfilerCodeObserver redirects these events onto the
profiling thread for later dispatch.
Bug: v8:9151
Change-Id: Ib5b152446d2a3838e1b00a80253fc4fbd2f6e8c3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1604143
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#62943}
Now that we support a max_samples parameter, it isn't actually necessary
to have a record_samples flag (as it can just be modeled by 0).
Change-Id: I578ecc9f6ee73ecbe1f93d0d04ee8028a9a2716d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1611015
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61717}
Permit individual calls to CpuProfiler::StartSampling to provide their
own requested sampling interval, to be snapped to the profiler's
sampling interval. Use the greatest common divisor of all sample rates
to determine what sample rate should be chosen for the sampling thread,
and dispatch samples to attached profilers based on their requested
sample periodicity.
Change-Id: I0b076d09761d7176f31725e112578b68ab5da54c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1484461
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#61548}
Helps make configuring profilers more scalable as our number of
parameters grows.
Change-Id: I81263a30c221edaa3934a92eb000b71ddfbdea60
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1601585
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#61402}
To prevent OOMs for leaked CPU profilers, add the option to limit the
maximum number of samples that are included in a CPU profile.
Bug: chromium:956688
Change-Id: I119d0622e7d39c187f8e09e2d49dec91fd724ecb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1588412
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61352}
Adds a new flag to CpuProfiler to control whether or not "debug" names
(potentially inferred from scope) are used for captured frames
associated with a SharedFunctionInfo instance.
Bug: v8:9135
Change-Id: Ia1db20e389f3d0beb60eb47798820fb11d501c88
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1583042
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61015}
This reverts commit fa6ec3cb08.
Reason for revert: v8:9169, v8:9170
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux/31457https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64/31417https://ci.chromium.org/p/v8/builders/ci/V8%20Win32%20-%20debug/19919
Original change's description:
> [cpu-profiler] Split out debug mode for CPU profiler naming
>
> Adds a new flag to CpuProfiler to control whether or not "debug" names
> (potentially inferred from scope) are used for captured frames
> associated with a SharedFunctionInfo instance.
>
> Bug: v8:9135
> Change-Id: I104f3246431dc6336de4e4688c0d98c86e0bb776
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1566169
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Alexei Filippov <alph@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Commit-Queue: Peter Marshall <petermarshall@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#60972}
TBR=ulan@chromium.org,alph@chromium.org,yangguo@chromium.org,petermarshall@chromium.org,acomminos@fb.com
Change-Id: I573194b5affd31fd0748b9ef3c45052e8ab420f5
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9135
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1581639
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60973}
Adds a new flag to CpuProfiler to control whether or not "debug" names
(potentially inferred from scope) are used for captured frames
associated with a SharedFunctionInfo instance.
Bug: v8:9135
Change-Id: I104f3246431dc6336de4e4688c0d98c86e0bb776
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1566169
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60972}
Adds CpuProfiler::SetUsePreciseSampling, which provides a hint whether
to sacrifice CPU cycles to reduce the level of sampling interval
variance. On Windows, this controls whether or not busy waiting is
performed for sample rates < 100ms. Defaults to enabled (old behaviour).
Bug: v8:3967
Change-Id: Iee84c3ae8132541c78b1f78bf294ec7c718bb19b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1510577
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60866}
Adds the notion of a "source type" to CpuProfileNode instances, hinting
at the underlying source of the function or state that resulted in the
generation of the node.
Bug: v8:9001
Change-Id: Ie14c54d41b99eb02f54b423fa5d939e9d7f63785
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1510576
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60590}
Consumers can use this to derive the full stack from sampled leaf nodes
without having to flatten the tree.
Bug: v8:8999
Change-Id: I42c638dd2c757837b0c03514c204be0182653291
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1525877
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60309}
