To enable deallocation of CodeEntry objects after they're no longer
being referenced by an active profile or alive on the heap, replace the
|used| bit with a proper reference count maintained by a CodeMap.
Bug: v8:11054
Change-Id: I3016cdbcbd1b4e8a26c3b1689e968cb2eef8e6d8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2965493
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#75193}
This reverts commit 8e44ee5f75.
Reason for revert: Reverting due to UBSan failures - https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20UBSan/16888.
Original change's description:
> [cpu-profiler] Reference counting for code entries
>
> To enable deallocation of CodeEntry objects after they're no longer
> being referenced by an active profile or alive on the heap, replace the
> |used| bit with a proper reference count maintained by a CodeMap.
>
> Bug: v8:11054
> Change-Id: Id3d5941e509504415692f833e406ecdd2553d426
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2945541
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Commit-Queue: Andrew Comminos <acomminos@fb.com>
> Cr-Commit-Position: refs/heads/master@{#75164}
Bug: v8:11054
Change-Id: Iae3ae73014c7eafe20917cf088a569f370d9b53d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2965489
Auto-Submit: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#75165}
To enable deallocation of CodeEntry objects after they're no longer
being referenced by an active profile or alive on the heap, replace the
|used| bit with a proper reference count maintained by a CodeMap.
Bug: v8:11054
Change-Id: Id3d5941e509504415692f833e406ecdd2553d426
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2945541
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#75164}
This CL enhances the fast C API in a way to allow passing the receiver
to the fast callback as Local<Object> instead of Local<Value>. It also
fixes documentation comments.
Bug: chromium:1052746
Change-Id: I424aa83023c2e6633b9df08ee040bf170db32b3d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2887510
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74519}
This CL makes the object passed as argument to IsLeafTemplateForApiObject
be received as a handle instead of a raw C++ pointer. From the codegen
point of view, the memory representation is the same, so this doesn't
change its semantics.
Bug: chromium:1052746
Change-Id: Ibc116aa4d577ba95f30d1014f15f34ef3fbb1a35
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2851884
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74220}
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}
This is a reland of 6124a534b2
It fixes a UAF issue in the d8 test by moving the test API object
constructor to PerIsolateData. It also fixes a crash in Chromium
caused by current usage of v8::ApiObject, which should be migrated
to v8::Value*.
Original change's description:
> [fastcall] Add support for leaf interface type checks
>
> This CL adds an IsTemplateForApiObject method to FunctionTemplate
> allowing the embedder to check whether a given API object was
> instantiated by this template without including parent templates
> in the search. It also replaces the v8::ApiObject in the fast API
> with a raw v8::Value pointer to allow use of standard C++ casts.
>
> Bug: chromium:1052746
> Change-Id: I0812ec8b4daaa5f5005aabf10b63e1e84e0b8f03
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2595310
> Commit-Queue: Maya Lekova <mslekova@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73999}
Bug: chromium:1052746, chromium:1199900
Change-Id: I4b7f0c9e9152919dde4a1d0c48fbf5ac8c5b13d8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2835711
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74064}
This reverts commit 6124a534b2.
Reason for revert: On suspicion of blocking V8 roll: https://ci.chromium.org/ui/p/chromium/builders/try/win10_chromium_x64_rel_ng/839568/overview
Original change's description:
> [fastcall] Add support for leaf interface type checks
>
> This CL adds an IsTemplateForApiObject method to FunctionTemplate
> allowing the embedder to check whether a given API object was
> instantiated by this template without including parent templates
> in the search. It also replaces the v8::ApiObject in the fast API
> with a raw v8::Value pointer to allow use of standard C++ casts.
>
> Bug: chromium:1052746
> Change-Id: I0812ec8b4daaa5f5005aabf10b63e1e84e0b8f03
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2595310
> Commit-Queue: Maya Lekova <mslekova@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73999}
Bug: chromium:1052746
Change-Id: Ic99ec616310f0f75800c3dad393b5d2d685b76ab
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2829988
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#74016}
This CL adds an IsTemplateForApiObject method to FunctionTemplate
allowing the embedder to check whether a given API object was
instantiated by this template without including parent templates
in the search. It also replaces the v8::ApiObject in the fast API
with a raw v8::Value pointer to allow use of standard C++ casts.
Bug: chromium:1052746
Change-Id: I0812ec8b4daaa5f5005aabf10b63e1e84e0b8f03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2595310
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73999}
Disable or support --always-sparkplug in various tests that until now
were always expecting only bytecode.
Bug: v8:11420
Change-Id: Ida45041739fb55851aa493c51f1ed796aa1c0606
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2786852
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73668}
Use a local context and compilation cache clearing to trigger code
deletion in ClearUnusedWithEagerLogging, rather than relying on bytecode
flushing. This allows the test to succeed with non-flushable
native-context-independent code, like Sparkplug baseline code.
Bug: v8:11420
Change-Id: Id6e3626b6245b4308d95aa3995a8fb2ee53684f7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2786851
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73663}
Propagates CodeDeleteEvents to the CPU profiler based on finalizers
registered in a WeakCodeRegistry, which tracks heap objects for weakly
owned CodeEntries.
Bug: v8:11054
Change-Id: I4c1f7885e982241724ca9f284f864da008ce9d75
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2751606
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#73585}
This is a reland of a8b61ef521
The main reason for the revert was not related to this CL and was fixed
with https://crrev.com/c/2739646
In addition debug output in d8.test.verifySourcePositions was removed
due to TSAN complaints.
Original change's description:
> [sparkplug] Change bytecode offset mapping and introduce iterator.
>
> Previously, we recorded pairs of (bytecode offset, sparkplug pc) to
> create a mapping of bytecode offset <-> sparkplug pc.
> These pairs were only recorded after builtin/runtime calls.
> In preparation for deoptimizing to Sparkplug, we need a more precise
> mapping.
> With this CL, we record positions for every bytecode. Instead of storing
> a pair of (bytecode offset, sparkplug pc), we store only the pc,
> calculating the bytecode offset from the index in the mapping table.
> For easier use an iterator to access the mapping is introduced.
>
> Drive-by: Reduce sampling interval in cpu-profiler cctest to get rid of
flaky failures.
>
> Bug: v8:11420, v8:11429
> Change-Id: I36a9171f43a574eb67880cbca6cf9ff7ab291e60
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2720189
> Reviewed-by: Victor Gomes <victorgomes@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Auto-Submit: Patrick Thier <pthier@chromium.org>
> Commit-Queue: Patrick Thier <pthier@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73186}
>
> Change-Id: I9ab4cb60da002ef130f8a21ad10ba69e2826a7b6
Change-Id: I9ab4cb60da002ef130f8a21ad10ba69e2826a7b6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2745335
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73293}
This reverts commit a8b61ef521.
Reason for revert: Looks like it breaks GC stress bot - https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/35880/overview
Original change's description:
> [sparkplug] Change bytecode offset mapping and introduce iterator.
>
> Previously, we recorded pairs of (bytecode offset, sparkplug pc) to
> create a mapping of bytecode offset <-> sparkplug pc.
> These pairs were only recorded after builtin/runtime calls.
> In preparation for deoptimizing to Sparkplug, we need a more precise
> mapping.
> With this CL, we record positions for every bytecode. Instead of storing
> a pair of (bytecode offset, sparkplug pc), we store only the pc,
> calculating the bytecode offset from the index in the mapping table.
> For easier use an iterator to access the mapping is introduced.
>
> Drive-by: Reduce sampling interval in cpu-profiler cctest to get rid of
> flaky failures.
>
> Bug: v8:11420, v8:11429
> Change-Id: I36a9171f43a574eb67880cbca6cf9ff7ab291e60
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2720189
> Reviewed-by: Victor Gomes <victorgomes@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Auto-Submit: Patrick Thier <pthier@chromium.org>
> Commit-Queue: Patrick Thier <pthier@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73186}
Bug: v8:11420
Bug: v8:11429
Change-Id: Ie71e7ce234e7b9ab9a2ec99a983e9900f35baa44
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2735397
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#73187}
Previously, we recorded pairs of (bytecode offset, sparkplug pc) to
create a mapping of bytecode offset <-> sparkplug pc.
These pairs were only recorded after builtin/runtime calls.
In preparation for deoptimizing to Sparkplug, we need a more precise
mapping.
With this CL, we record positions for every bytecode. Instead of storing
a pair of (bytecode offset, sparkplug pc), we store only the pc,
calculating the bytecode offset from the index in the mapping table.
For easier use an iterator to access the mapping is introduced.
Drive-by: Reduce sampling interval in cpu-profiler cctest to get rid of
flaky failures.
Bug: v8:11420, v8:11429
Change-Id: I36a9171f43a574eb67880cbca6cf9ff7ab291e60
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2720189
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Auto-Submit: Patrick Thier <pthier@chromium.org>
Commit-Queue: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73186}
Clean-up and slightly unify the CodeEvent tags:
* Remove INTERPRETED_FUNCTION_TAG. It was only used for interpreter
trampoline copies, which are used for
--interpreted-frames-native-stack. However, even actual bytecode
compilation doesn't use INTERPRETED_FUNCTION_TAG, so we can remove
it for simplicity.
* The tag used by the above is now the same as for the bytecode
creation event, i.e. EVAL_TAG, SCRIPT_TAG, FUNCTION_TAG or
LAZY_COMPILE, depending on whether this was a script, and eval, an
eager or a lazy compile (respectively.
* Baseline was also using INTERPRETED_FUNCTION_TAG, so now it does the
same thing as above.
* Existing code is now logged as FUNCTION_TAG rather than
LAZY_COMPILE, because we lost the laziness information.
* The SCRIPT_TAG is set based on the SharedFunctionInfo flags, not
the compilation flags, so that eager inner functions are labelled as
FUNCTION_TAG rather than SCRIPT_TAG.
Bug: v8:11420,v8:11429
Change-Id: I0286002674255ff4ba8f5d865df372a3e2975b16
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2713104
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73047}
- Remove unused type inference paths which will be replaced
with more explicit structs.
- Removes the tagged pointer from CTypeInfo since the embedder
will perform the type check for API objects.
Bug: chromium:1052746
Change-Id: I47a5f5ae35b06845b01b68cb089c67f76a7fb05e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2686685
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72848}
When the CPU profiler receives a bytecode flush event, ensure that we
clear the appropriate CodeEntry.
Bug: v8:11054
Change-Id: I94e771e42192b75ea6d317738e4f2d5b76533dc8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2691826
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Cr-Commit-Position: refs/heads/master@{#72684}
The removed flags are:
1. --turbo-nci-as-midtier
2. --turbo-nci-cache-ageing
3. --turbo-nci-delayed-codegen
Flag 1. was used by a testing mode that is no longer used. Flags 2. and
3. were used to experiment with codegen and cacheing heuristics, no
longer needed now that work is suspended.
Bug: v8:8888
Change-Id: Ib4a89f09340c2d94ee7688928c8235276c1f1032
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2661461
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72476}
Listen to code deletion events by registering finalizers on code
objects, a first stab at non-leaky long-lived code entries.
Bug: v8:11054
Change-Id: Ieaaa5b63508263bd261e8385f5bf5dd3baedf9c5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2628587
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72342}
DevTools can't unambiguously determine whether code is JS or wasm.
This CL adds a string to the tracing output that will be 'JS', 'wasm' or
'other'.
Bug: chromium:1168052
Change-Id: Iaacb5ea9a83327e22d60bf6114f607e6fa5532ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2637859
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72193}
76217f5 fixed the profiler so it would only sample a thread if
it had the Isolate lock. Unfortunately, this fix missed a timing
window where a thread might have the Isolate lock but might not
have restored the thread-specific data such as thread_local_top_
for the locked thread yet, so the sampler might end up using data
from a different thread.
This doesn't cause any seg faults or the like because the thread
we *meant* to sample has the Isolate lock so the thread we're
accidentally sampling can't mess with any Isolate data but we can
still get incorrect sample data which can be especially obvious if
the accidentally sampled thread is inside code that would never
run on the thread we meant to sample.
Fortunately, we can tell when all thread-specific data has been
restored to the Isolate because thread_state_ in the
PerIsolateThreadData for a thread is set to a non-null value
until everything has been restored, at which point it gets set
to null. So the fix adds a check after the test for the Isolate
lock to check if thread_state_ is null for the thread we mean to
sample. If so, we know all the data in the Isolate is good to go
for sampling.
Bug: v8:11316
Change-Id: I02d6361d8cbd6ec809ad8fb7ef07f5e9c94c7d1e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2628133
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72112}
As a first step towards freeing CodeEntry objects that are neither still
referenced by JS or stored in a profile, enable freeing of refcounted
strings by CodeEntry instances. For now, this leaves behaviour unchanged
until we receive CodeEntry destruction events.
Bug: v8:11054
Change-Id: Iabd05aa730343cd1a879ff5b04326f23e68aa948
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2590604
Commit-Queue: Andrew Comminos <acomminos@fb.com>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71858}
This CL changes SharedFunctionInfo::GetBytecodeArray to a function
template, which is specialized for Isolate and LocalIsolate arguments.
This allows main thread only uses to avoid taking a lock.
Bug: v8:7790, chromium:1154603
Change-Id: I3462c4e36b66073e09393c01c765dd8a018a98f0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2595307
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71833}
There is a race in the way we handle deopts that made this test flaky.
The race is not hugely important to fix, and is difficult without
breaking something else.
The best thing to do here is update the test to reflect reality so we
can get the test coverage back.
This updates the test so that the deopt reason can be found either
on the first or second level function. The test assumed it would
always be available on the second level function in the profile,
but if we get a regular profile tick at the exact wrong time, we
could end up with the deopt info getting attached to the first level
function. So we accept either.
Bug: v8:5193
Change-Id: Ia43880ebafd1341a514b3143dc215514b5dccf15
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2594775
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71797}
This CL moves the disabling to the test source code.
Bug: v8:11178
Change-Id: I9771c1eb2ea474143bb401ba40f4452f6e6572ec
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2549963
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71278}
This CL introduces a new fast_api_call_target field on the isolate,
which is set by Turbofan before making the fast call. It then uses
the field when creating a stack sample and stores it in the existing
external_callback_entry used for regular API callbacks. The CL also
adds a cctest with simple usage scenario and introduces a minor
refactoring in test-api.cc.
Design doc:
https://docs.google.com/document/d/1r32qlPzGz0P7nieisJ5h2qfSnWOs40Cigt0LXPipejE/edit
Bug: chromium:1052746
Change-Id: I2dab1bc395ccab0c14088f7c354fb52b08df8d32
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2488683
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71254}
- 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}
We kept the CodeMap filled with entries between profiles, even in
kLazyLogging mode which will re-fill the CodeMap when profiling starts
again. See the bug for more details.
This fix manually clears the CodeMap after the last profile is deleted.
We already call DisableLogging() when the last profile is stopped. At
this point we still need the CodeMap alive because the profile object
we expose via the API is backed by the CodeEntry objects in the CodeMap.
Once the last profile is deleted though, we can empty the CodeMap.
There is still another bug, which is that we never delete CodeEntry
objects for deleted code, as there are no CodeDeleteEvents from the GC.
We will work on that separately, but this fix should stop those leaks
accumulating between profiles as we wipe the CodeMap entirely between
profiles (at least for kLazyLogging mode). kEagerLogging mode still has
this problem and will only be fixed by introducing CodeDelete events or
similar.
Bug: v8:11051
Change-Id: Iab9570747d17c657e6e318d434f935af8047d05f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2491033
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70792}
No major functional changes in this CL, mostly it moves code around
to make follow-up CLs less messy.
- Document Code layout.
- New concepts: 'body' and 'metadata' areas of Code objects. The
metadata area contains metadata tables, the body area includes
both instructions and metadata (this is currently the 'instructions'
area). Add accessors for these new areas.
- An interesting detail: embedded builtins will have non-adjacent
instruction and metadata areas, thus a concept of 'body' doesn't
make sense there.
- Also add raw_instruction_X_future accessors; these are used where
we are actually interested in the instructions range, not the entire
body. In a follow-up, current raw_instruction_X accessors will be
replaced by raw_body_X, and raw_instruction_X_future by
raw_instruction_X.
Bug: v8:11036
Change-Id: I1d85146b652e0c097c3602d4db1862d5d3898a7e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2491023
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70701}
Always spend 1ms per iteration.
Previously if the profilerthread took a long time to start up then we
would skip through iterations and potentially not gather enough samples.
This forces each iteration to take 1ms.
Bug: v8:10996
Change-Id: I0dd7bb7e31636c9ebf5dd99110c8a976cbc8f045
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2461727
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70466}
1. Set profiling interval to 100us to get 10x the samples
2. Guarantee we spend at least 1ms per iteration, instead of only
bailing out if we spend more than 1ms. This gives us enough samples on
release mode.
3. Increase the time spent profiling optimized code
Bug: v8:10996
Change-Id: I1348ebce48fe998e79b5847f3e3d037148302dcc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2460823
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70403}
Rename it to Symbolizer because it does exactly that.
Change the SymbolizeTickSample method to return the symbolized state
rather than pass it on to the ProfilesCollection. This makes it easier
to test as now it only relies on the CodeMap provided to it.
Make EntryForVMState a free-floating function as it doesn't rely on
state and then we can avoid importing the StateTag definition in the
header.
Remove the UNREACHABLE from EntryForVMState as the compiler got smarter
and doesn't need it anymore.
Pass the CpuProfilesCollection to SamplingEventsProcessor instead,
as it is now responsible for putting the symbolized samples into the
collection to be sorted into the appropriate profiles.
Change-Id: I104290eff22b7d94a1bd34ba904036badccf4e13
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2440522
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70248}
This reverts commit 8b60d8fcbf.
Reason for revert: Flaky on windows: https://ci.chromium.org/p/v8/builders/ci/V8%20Win32%20-%20debug/27302
Original change's description:
> Reland "[cpu-profiler] Log OSR code when starting the profiler"
>
> This is a reland of f696528189
>
> Updated the test:
> 1. Set profiling interval to 100us to get 10x the samples
> 2. Guarantee we spend at least 1ms per iteration, instead of only
> bailing out if we spend more than 1ms. This gives us enough samples on
> release mode.
> 3. Increase the time spent profiling optimized code by 50% to make sure
> we have a big enough difference.
>
> With 1000 iterations I didn't see any flakes locally so this looks solid
> now.
>
> Original change's description:
> > [cpu-profiler] Log OSR code when starting the profiler
> >
> > OSR code doesn't hang off any JSFunction or SFI, so we missed it when
> > starting up the profiler. This meant we didn't properly attribute
> > ticks to SFI code. The ticks ended up going to the caller instead.
> >
> > There is a weak cache of OSR code per native context, so iterate that
> > on profiler startup and log all the code objects.
> >
> > Change-Id: I2e9738b86a488b37f36ac89803561607dc76f745
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2414216
> > Commit-Queue: Peter Marshall <petermarshall@chromium.org>
> > Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> > Reviewed-by: Mythri Alle <mythria@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#69964}
>
> Change-Id: Ib506e88b546008e462967259763bbf985b74b462
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2418092
> Commit-Queue: Peter Marshall <petermarshall@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Mythri Alle <mythria@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69990}
TBR=mythria@chromium.org,petermarshall@chromium.org,dinfuehr@chromium.org
Change-Id: Ie3272c4fd297ca6f10a47c3fe8826e226a9f0545
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2418714
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69999}
This is a reland of f696528189
Updated the test:
1. Set profiling interval to 100us to get 10x the samples
2. Guarantee we spend at least 1ms per iteration, instead of only
bailing out if we spend more than 1ms. This gives us enough samples on
release mode.
3. Increase the time spent profiling optimized code by 50% to make sure
we have a big enough difference.
With 1000 iterations I didn't see any flakes locally so this looks solid
now.
Original change's description:
> [cpu-profiler] Log OSR code when starting the profiler
>
> OSR code doesn't hang off any JSFunction or SFI, so we missed it when
> starting up the profiler. This meant we didn't properly attribute
> ticks to SFI code. The ticks ended up going to the caller instead.
>
> There is a weak cache of OSR code per native context, so iterate that
> on profiler startup and log all the code objects.
>
> Change-Id: I2e9738b86a488b37f36ac89803561607dc76f745
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2414216
> Commit-Queue: Peter Marshall <petermarshall@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Mythri Alle <mythria@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69964}
Change-Id: Ib506e88b546008e462967259763bbf985b74b462
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2418092
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69990}
This reverts commit f696528189.
Reason for revert: Test is flaky: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64/39092
Original change's description:
> [cpu-profiler] Log OSR code when starting the profiler
>
> OSR code doesn't hang off any JSFunction or SFI, so we missed it when
> starting up the profiler. This meant we didn't properly attribute
> ticks to SFI code. The ticks ended up going to the caller instead.
>
> There is a weak cache of OSR code per native context, so iterate that
> on profiler startup and log all the code objects.
>
> Change-Id: I2e9738b86a488b37f36ac89803561607dc76f745
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2414216
> Commit-Queue: Peter Marshall <petermarshall@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Mythri Alle <mythria@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69964}
TBR=mythria@chromium.org,petermarshall@chromium.org,dinfuehr@chromium.org
Change-Id: I1e69f8af88d901bab6f257652d3536d24a4777f9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2415994
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69969}
OSR code doesn't hang off any JSFunction or SFI, so we missed it when
starting up the profiler. This meant we didn't properly attribute
ticks to SFI code. The ticks ended up going to the caller instead.
There is a weak cache of OSR code per native context, so iterate that
on profiler startup and log all the code objects.
Change-Id: I2e9738b86a488b37f36ac89803561607dc76f745
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2414216
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69964}
While the sampler checked if the sampled thread had the Isolate locked
(if locks are being used) under Linux, the check was not done under
Windows (or Fuchsia) which meant that in a multi-threading application
under Windows, thread locking was not checked making it prone to seg
faults and the like as the profiler would be using isolate->js_entry_sp
to determine the stack to walk but isolate->js_entry_sp is the stack
pointer for the thread that currently has the Isolate lock so, if the
sampled thread does not have the lock, the sampler woud be iterating
over the wrong stack, one that might actually be actively changing on
another thread. The fix was to move the lock check into CpuSampler
and Ticker (--prof) so all OSes would do the correct check.
The basic concept is that on all operating systems a CpuProfiler, and
so its corresponding CpuCampler, the profiler is tied to a thread.
This is not based on first principles or anything, it's simply the
way it works in V8, though it is a useful conceit as it makes
visualization and interpretation of profile data much easier.
To collect a sample on a thread associated with a profiler the thread
must be stopped for obvious reasons -- walking the stack of a running
thread is a formula for disaster. The mechanism for stopping a thread
is OS-specific and is done in sample.cc. There are currently three
basic approaches, one for Linux/Unix variants, one for Windows and one
for Fuchsia. The approaches vary as to which thread actually collects
the sample -- under Linux the sample is actually collected on the
(interrupted) sampled thread whereas under Fuchsia/Windows it's on
a separate thread.
However, in a multi-threaded environment (where Locker is used), it's
not sufficient for the sampled thread to be stopped. Because the stack
walk involves looking in the Isolate heap, no other thread can be
messing with the heap while the sample is collected. The only ways to
ensure this would be to either stop all threads whenever collecting a
sample, or to ensure that the thread being sampled holds the Isolate
lock so prevents other threads from messing with the heap. While there
might be something to be said for the "stop all threads" approach, the
current approach in V8 is to only stop the sampled thread so, if in a
multi-threaded environment, the profiler must check if the thread being
sampled holds the Isolate lock.
Since this check must be done, independent of which thread the sample
is being collected on (since it varies from OS to OS), the approach is
to save the thread id of the thread to be profiled/sampled when the
CpuSampler is instantiated (on all OSes it is instantiated on the
sampled thread) and then check that thread id against the Isolate lock
holder thread id before collecting a sample. If it matches, we know
sample.cc has stop the sampled thread, one way or another, and we know
that no other thread can mess with the heap (since the stopped thread
holds the Isolate lock) so it's safe to walk the stack and collect data
from the heap so the sample can be taken. It it doesn't match, we can't
safely collect the sample so we don't.
Bug: v8:10850
Change-Id: Iba6cabcd3e11a19c261c004103e37e806934dc6f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2411343
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69952}
If code is deoptimized while CPU profiling, a deoptimization event
record is sent to the profiler. But if the profiler could not find
the associated CodeMap entry in CodeDeoptEventRecord::UpdateCodeMap
it would simply return without freeing the deopt_frames array.
This change frees the deopt_frames array no matter what in
CodeDeoptEventRecord::UpdateCodeMap, eliminating a storage leak.
Bug: v8:10861
Change-Id: I4e68566bb91dff13b38e255ddfed24b85b7a1d57
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2386332
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69901}
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}
Using the Template::Set method which const char name is more ergonomic
and it creates directly an internalized name instead of the normal
string that most users pass in.
Bug: v8:10884
Change-Id: I00c6d49fee9de16b8ebbfe75be4b383831f0d4dd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2400980
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69787}
This adds a global counter for the various reasons we might fail to
attribute a tick.
The counters are cleared and printed when Profile::Print() is called,
which we call in our tests, so flaky test output will now contain these
stats along with the printed profile tree.
Drive-by cleanup some print functions and make them const.
Change-Id: Ia3a27405f5b5346adfdbb32afc7e414857969cc5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1550406
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69647}
This reverts commit dfb3f7daa5.
Reason for revert: Breaks LSAN & ASAN flakily: https://bugs.chromium.org/p/v8/issues/detail?id=10861
Original change's description:
> [cpu-profiler] Ensure sampled thread has Isolate lock under Windows
>
> While the sampler checked if the sampled thread had the Isolate locked
> (if locks are being used) under Linux, the check was not done under
> Windows (or Fuchsia) which meant that in a multi-threading application
> under Windows, thread locking was not checked making it prone to seg
> faults and the like as the profiler would be extracting info from a
> heap in motion. The fix was to move the lock check into CpuSampler
> and Ticker (--prof) so all OSes would do the correct check.
>
> The basic concept is that on all operating systems a CpuProfiler, and
> so its corresponding CpuCampler, the profiler is tied to a thread.
> This is not based on first principles or anything, it's simply the
> way it works in V8, though it is a useful conceit as it makes
> visualization and interpretation of profile data much easier.
>
> To collect a sample on a thread associated with a profiler the thread
> must be stopped for obvious reasons -- walking the stack of a running
> thread is a formula for disaster. The mechanism for stopping a thread
> is OS-specific and is done in sample.cc. There are currently three
> basic approaches, one for Linux/Unix variants, one for Windows and one
> for Fuchsia. The approaches vary as to which thread actually collects
> the sample -- under Linux the sample is actually collected on the
> (interrupted) sampled thread whereas under Fuchsia/Windows it's on
> a separate thread.
>
> However, in a multi-threaded environment (where Locker is used), it's
> not sufficient for the sampled thread to be stopped. Because the stack
> walk involves looking in the Isolate heap, no other thread can be
> messing with the heap while the sample is collected. The only ways to
> ensure this would be to either stop all threads whenever collecting a
> sample, or to ensure that the thread being sampled holds the Isolate
> lock so prevents other threads from messing with the heap. While there
> might be something to be said for the "stop all threads" approach, the
> current approach in V8 is to only stop the sampled thread so, if in a
> multi-threaded environment, the profiler must check if the thread being
> sampled holds the Isolate lock.
>
> Since this check must be done, independent of which thread the sample
> is being collected on (since it varies from OS to OS), the approach is
> to save the thread id of the thread to be profiled/sampled when the
> CpuSampler is instantiated (on all OSes it is instantiated on the
> sampled thread) and then check that thread id against the Isolate lock
> holder thread id before collecting a sample. If it matches, we know
> sample.cc has stop the sampled thread, one way or another, and we know
> that no other thread can mess with the heap (since the stopped thread
> holds the Isolate lock) so it's safe to walk the stack and collect data
> from the heap so the sample can be taken. It it doesn't match, we can't
> safely collect the sample so we don't.
>
> Bug: v8:10850
> Change-Id: Iab2493130b9328430d7e5f5d3cf90ad6d10b1892
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2377108
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Commit-Queue: Peter Marshall <petermarshall@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69623}
TBR=akodat@rocketsoftware.com,petermarshall@chromium.org,petermarshall@google.com
Change-Id: Ib6b6dc4ce109d5aa4e504fa7c9769f5cd95ddd0c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10850
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2387570
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69638}
While the sampler checked if the sampled thread had the Isolate locked
(if locks are being used) under Linux, the check was not done under
Windows (or Fuchsia) which meant that in a multi-threading application
under Windows, thread locking was not checked making it prone to seg
faults and the like as the profiler would be extracting info from a
heap in motion. The fix was to move the lock check into CpuSampler
and Ticker (--prof) so all OSes would do the correct check.
The basic concept is that on all operating systems a CpuProfiler, and
so its corresponding CpuCampler, the profiler is tied to a thread.
This is not based on first principles or anything, it's simply the
way it works in V8, though it is a useful conceit as it makes
visualization and interpretation of profile data much easier.
To collect a sample on a thread associated with a profiler the thread
must be stopped for obvious reasons -- walking the stack of a running
thread is a formula for disaster. The mechanism for stopping a thread
is OS-specific and is done in sample.cc. There are currently three
basic approaches, one for Linux/Unix variants, one for Windows and one
for Fuchsia. The approaches vary as to which thread actually collects
the sample -- under Linux the sample is actually collected on the
(interrupted) sampled thread whereas under Fuchsia/Windows it's on
a separate thread.
However, in a multi-threaded environment (where Locker is used), it's
not sufficient for the sampled thread to be stopped. Because the stack
walk involves looking in the Isolate heap, no other thread can be
messing with the heap while the sample is collected. The only ways to
ensure this would be to either stop all threads whenever collecting a
sample, or to ensure that the thread being sampled holds the Isolate
lock so prevents other threads from messing with the heap. While there
might be something to be said for the "stop all threads" approach, the
current approach in V8 is to only stop the sampled thread so, if in a
multi-threaded environment, the profiler must check if the thread being
sampled holds the Isolate lock.
Since this check must be done, independent of which thread the sample
is being collected on (since it varies from OS to OS), the approach is
to save the thread id of the thread to be profiled/sampled when the
CpuSampler is instantiated (on all OSes it is instantiated on the
sampled thread) and then check that thread id against the Isolate lock
holder thread id before collecting a sample. If it matches, we know
sample.cc has stop the sampled thread, one way or another, and we know
that no other thread can mess with the heap (since the stopped thread
holds the Isolate lock) so it's safe to walk the stack and collect data
from the heap so the sample can be taken. It it doesn't match, we can't
safely collect the sample so we don't.
Bug: v8:10850
Change-Id: Iab2493130b9328430d7e5f5d3cf90ad6d10b1892
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2377108
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69623}
