Adds support for conservative stack scanning on x64. The trampolines
saving callee-saved registers are compiled using clang (non-Windows)
and MASM (Windows). This is using the default toolchain for assembly
in Chromium/V8.
This differs from Oilpan in Chromium where x86 and x64 are compiled
using NASM [1]. V8 does not yet require this dependency and building
the trampolines natively avoids it. (NASM also requires separate
blocks for x64 Windows and non-Windows.) On non-x86/x64 platforms
Chromium also uses clang, so there's little benefit in keeping the
dependency.
The trampolines are tested when building with clang.
Other platforms follow in separate CLs.
[1] https://source.chromium.org/chromium/chromium/src/+/master:third_party/blink/renderer/platform/heap/asm/SaveRegisters_x86.asm
Change-Id: Ice2e23e44391aa94147abe75ee0b5afac458b8f8
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2124319
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66913}
This CL adds basic infrastructure for:
- MakeGarbageCollected
- GarbageCollected and related type traits
- Heap (API / internal)
- Basic allocation based on malloc
- CollectGarbage without marking
This allows for allocation and reclamation through an explicit GC
call. No objects are held alive from any source (stack, globals,
refs), yet.
The exact wiring of platform is future work.
Change-Id: I81b7c0ba7b525188f8c0bf9de3b7af35d34322af
Bug: chromium:1056170
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2120538
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66887}
This adds HeapObjectHeader, a meta object that is put in front of
every managed object. HeapObjectHeader provides accessors for:
1. GCInfoIndex
2. In construction bit
3. size
4. Mark bit
Meta info is distributed among two uint16_t fields as (1.,2.) and
(3.,4.). This is convenient as the non-bit accessors (size,
GCInfoIndex) are constant during marking.
Object layout see heap-object-header.h.
Note: The current implementation does not bypass ASAN poisoning and
assumes an unpoisoned header whenever performing an access.
Bug: chromium:1056170
Change-Id: I753f15467ed5c2b22b47e64d3aa5a3c1baddf8e1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2116031
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66861}
Add LocalHandleScope to allow for local handles in LocalHeaps
(background threads). This class is similar to HandleScope which still
needs to be used on the main thread. When performing a GC, the main
thread halts all background threads at a safepoint such that it can
safely iterate their roots.
Bug: v8:10315
Change-Id: Id8f5d54cc2535e004081ccdef15dc03a39b2d0f0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2111218
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66853}
GCInfo and its related infrastructure is used to record information
about types. Currently, we store finalization and vtable information.
Future changes will introduce naming and tracing, similar to Oilpan in
Blink.
Information is stored in a process-wide global table that is
maintained at runtime. For static builds such information can be
recorded in the binary without the runtime overhead which is future
work.
This ports `third_party/blink/renderer/platform/heap/gc_info.{h,cc}`
on a semantic level. In addition to adjusting to V8's needs, we also
re-commit the already filled parts of the info table as read-only when
possible, making it harder to override type information.
Bug: chromium:1056170
Change-Id: Ib01eb24e6f8a94a4a647efde7af37689f8c20ba2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2111214
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66847}
"By my deeds I honor him. V8."
- Add basic build files for library and unittests.
- Integrate unittests also in existing V8 unittests for simplicity.
The CL also adds FinalizerTrait and unittests to allow building a
testing target that executes code.
FinalizerTrait is used to determine how managed C++ types are
finalized. The trait should not be overridable by users but needs to
be exposed on API-level to avoid including library-internal headers.
Bug: chromium:1056170
Change-Id: I64d91053410a17a7835e50547f58990625d2da28
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2108549
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66834}
This is a reland of e80ca24c80
Original change's description:
> [regexp] Rewrite error handling
>
> This patch modifies irregexp's error handling. Instead of representing
> errors as C strings, they are represented as an enumeration value
> (RegExpError), and only converted to strings when throwing the error
> object in regexp.cc. This makes it significantly easier to integrate
> into SpiderMonkey. A few notes:
>
> 1. Depending on whether the stack overflows during parsing or
> analysis, the stack overflow message can vary ("Stack overflow" or
> "Maximum call stack size exceeded"). I kept that behaviour in this
> patch, under the assumption that stack overflow messages are
> (sadly) the sorts of things that real world code ends up depending
> on.
>
> 2. Depending on the point in code where the error was identified,
> invalid unicode escapes could be reported as "Invalid Unicode
> escape", "Invalid unicode escape", or "Invalid Unicode escape
> sequence". I fervently hope that nobody depends on the specific
> wording of a syntax error, so I standardized on the first one. (It
> was both the most common, and the most consistent with other
> "Invalid X escape" messages.)
>
> 3. In addition to changing the representation, this patch also adds an
> error_pos field to RegExpParser and RegExpCompileData, which stores
> the position at which an error occurred. This is used by
> SpiderMonkey to provide more helpful messages about where a syntax
> error occurred in large regular expressions.
>
> 4. This model is closer to V8's existing MessageTemplate
> infrastructure. I considered trying to integrate it more closely
> with MessageTemplate, but since one of our stated goals for this
> project was to make it easier to use irregexp outside of V8, I
> decided to hold off.
>
> R=jgruber@chromium.org
>
> Bug: v8:10303
> Change-Id: I62605fd2def2fc539f38a7e0eefa04d36e14bbde
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2091863
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66784}
R=jgruber@chromium.org
Bug: v8:10303
Change-Id: Iad1f11a0e0b9e525d7499aacb56c27eff9e7c7b5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2109952
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66798}
This implements the first part of WebAssembly debug evaluate. The patch
includes the foundation required to execute evaluator modules. It only
implements the first of the APIs of the evaluator module spec.
Bug: chromium:1020120
Change-Id: I06ec98a63d0a0ec8d81c2eac4319c4b85d3e16c1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2089936
Commit-Queue: Philip Pfaffe <pfaffe@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66787}
This reverts commit e80ca24c80.
Reason for revert: Causes failures in the fast/regex/non-pattern-characters.html Blink web test (https://ci.chromium.org/p/v8/builders/ci/V8%20Blink%20Linux/3679)
Original change's description:
> [regexp] Rewrite error handling
>
> This patch modifies irregexp's error handling. Instead of representing
> errors as C strings, they are represented as an enumeration value
> (RegExpError), and only converted to strings when throwing the error
> object in regexp.cc. This makes it significantly easier to integrate
> into SpiderMonkey. A few notes:
>
> 1. Depending on whether the stack overflows during parsing or
> analysis, the stack overflow message can vary ("Stack overflow" or
> "Maximum call stack size exceeded"). I kept that behaviour in this
> patch, under the assumption that stack overflow messages are
> (sadly) the sorts of things that real world code ends up depending
> on.
>
> 2. Depending on the point in code where the error was identified,
> invalid unicode escapes could be reported as "Invalid Unicode
> escape", "Invalid unicode escape", or "Invalid Unicode escape
> sequence". I fervently hope that nobody depends on the specific
> wording of a syntax error, so I standardized on the first one. (It
> was both the most common, and the most consistent with other
> "Invalid X escape" messages.)
>
> 3. In addition to changing the representation, this patch also adds an
> error_pos field to RegExpParser and RegExpCompileData, which stores
> the position at which an error occurred. This is used by
> SpiderMonkey to provide more helpful messages about where a syntax
> error occurred in large regular expressions.
>
> 4. This model is closer to V8's existing MessageTemplate
> infrastructure. I considered trying to integrate it more closely
> with MessageTemplate, but since one of our stated goals for this
> project was to make it easier to use irregexp outside of V8, I
> decided to hold off.
>
> R=jgruber@chromium.org
>
> Bug: v8:10303
> Change-Id: I62605fd2def2fc539f38a7e0eefa04d36e14bbde
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2091863
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66784}
TBR=jgruber@chromium.org,iireland@mozilla.com
Change-Id: I9247635f3c5b17c943b9c4abaf82ebe7b2de165e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10303
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2108550
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66786}
This patch modifies irregexp's error handling. Instead of representing
errors as C strings, they are represented as an enumeration value
(RegExpError), and only converted to strings when throwing the error
object in regexp.cc. This makes it significantly easier to integrate
into SpiderMonkey. A few notes:
1. Depending on whether the stack overflows during parsing or
analysis, the stack overflow message can vary ("Stack overflow" or
"Maximum call stack size exceeded"). I kept that behaviour in this
patch, under the assumption that stack overflow messages are
(sadly) the sorts of things that real world code ends up depending
on.
2. Depending on the point in code where the error was identified,
invalid unicode escapes could be reported as "Invalid Unicode
escape", "Invalid unicode escape", or "Invalid Unicode escape
sequence". I fervently hope that nobody depends on the specific
wording of a syntax error, so I standardized on the first one. (It
was both the most common, and the most consistent with other
"Invalid X escape" messages.)
3. In addition to changing the representation, this patch also adds an
error_pos field to RegExpParser and RegExpCompileData, which stores
the position at which an error occurred. This is used by
SpiderMonkey to provide more helpful messages about where a syntax
error occurred in large regular expressions.
4. This model is closer to V8's existing MessageTemplate
infrastructure. I considered trying to integrate it more closely
with MessageTemplate, but since one of our stated goals for this
project was to make it easier to use irregexp outside of V8, I
decided to hold off.
R=jgruber@chromium.org
Bug: v8:10303
Change-Id: I62605fd2def2fc539f38a7e0eefa04d36e14bbde
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2091863
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66784}
Generate a BTI instruction at each target of an indirect branch
(BR/BLR). An indirect branch that doesn't jump to a BTI instruction
will generate an exception on a BTI-enabled core. On cores that do
not support the BTI extension, the BTI instruction is a NOP.
Targets of indirect branch instructions include, among other things,
function entrypoints, exception handlers and jump tables. Lazy deopt
exits can potentially be reached through an indirect branch when an
exception is thrown, so they also get an additional BTI instruction.
Bug: v8:10026
Change-Id: I0ebf51071f1b604f60f524096e013dfd64fcd7ff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1967315
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66751}
Add safepoint mechanism to stop concurrent threads and bring them to a
safepoint. Threads are stopped before the safepoint and after e.g. the
GC resumed again. Each thread needs to be stopped in a safepoint, such
that all roots can be iterated safely.
Running threads need to be cooperative and are required to perform
regular safepoint polls.
The last version of this CL was reverted because safepoint_requested_
wasn't initialized (see https://crrev.com/c/2105634).
Bug: v8:10315
Change-Id: I6ef244c0fb31c178589b5e3d1c62687a8dd65768
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2105635
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66732}
This reverts commit c84963eaa7.
Reason for revert: Fails on msan: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/31376
Original change's description:
> [heap] Introduce safepoint mechanism
>
> Add safepoint mechanism to stop concurrent threads and bring them to a
> safepoint. Threads are stopped before the safepoint and after e.g. the
> GC resumed again. Each thread needs to be stopped in a safepoint, such
> that all roots can be iterated safely.
>
> Running threads need to be cooperative and are required to perform
> regular safepoint polls.
>
> Bug: v8:10315
> Change-Id: I47f07e7d2ef5bc5adbba6b9e8e79a1f0f45b97ad
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2102578
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66727}
TBR=ulan@chromium.org,dinfuehr@chromium.org
Change-Id: If11281b2b9fc622b91261417b202676f23f60b50
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10315
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2105634
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66729}
Add safepoint mechanism to stop concurrent threads and bring them to a
safepoint. Threads are stopped before the safepoint and after e.g. the
GC resumed again. Each thread needs to be stopped in a safepoint, such
that all roots can be iterated safely.
Running threads need to be cooperative and are required to perform
regular safepoint polls.
Bug: v8:10315
Change-Id: I47f07e7d2ef5bc5adbba6b9e8e79a1f0f45b97ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2102578
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66727}
The set of registers to spill was wrong. Instead of spilling wasm
parameter registers (like the WasmCompileLazy builtin), we should spill
all registers that are being used as Liftoff cache registers.
This CL defines platform-specific WasmDebugBreakFrameConstants which
hold the set of registers to spill. This set is used in the builtin, and
will later be used for inspecting the spilled registers.
In order to iterate bit sets more easily in both direction (MSB to LSB
or LSB to MSB), we add a base::bits::IterateBits{,Backwards} method
which provides the respective iterators.
R=jkummerow@chromium.orgCC=thibaudm@chromium.org
Bug: v8:10222
Change-Id: I73ecbdff9b29e244c478b404063c0c9ee25bc821
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2102570
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66715}
Instead of directly using the Heap class concurrent threads will use the
LocalHeap class for all heap operations.
Bug: v8:10315
Change-Id: Ie007abb5b914af7f2507c9e790f34baacbcdf588
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096620
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66663}
Some wasm interpreter tests are failing since instructions generated
by gcc such as *multiply and and* create intermediate results bigger
than 8 bytes which doesn't match other architectures, hence the
resulting output differs.
Change-Id: I68cc58d01699bfe93051da693c4b7e819ffcc6eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2095613
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66660}
Considering that the security benefit is unclear at this point, the
performance and binary size costs are not justified.
This CL includes reverts of earlier partial disablings:
173a2bd8b5af7bf14fce85f72be318
Bug: chromium:977230, chromium:1055312, chromium:1055317
Change-Id: I173b61656a542687c4619fa374a0b2ee22c85ef7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2091474
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Hablich <hablich@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66623}
In the process:
* Augment C++-generated Torque classes with SizeFor methods to
calculate size of instances.
* Add a new "@generateBodyDescriptor" annotation that causes Torque to
generate C++ BodyDescriptors code that can be used to visit objects
compatible with existing V8 mechanisms, e.g. GC
* Fully automate C++ macro machinery so that adding non-extern Torque
class doesn't require any C++ changes, including ensuring generation
of instance types and proper boilerplate for validators and
printers.
* Make handling of @export a true annotation, allowing the modifier to
be used on class declarations.
* Add functionality such that classes with the @export annotation are
available to be used from C++. Field accessors for exported classes
are public and factory methods are generated to create instances of
the objects from C++.
* Change the Torque compiler such that Non-exported classes implicitly
have the @generateBodyDescriptor annotation added and causes both
verifiers and printers to be generated.
* Switch non-extern Torque classes from using existing Struct-based
machinery to being first-class classes that support more existing
Torque class features.
Change-Id: Ic60e60c2c6bd7acd57f949bce086898ad14a3b03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2007490
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66621}
This fixes a non-determinism issue caused by the cache being full.
Depending on the non-deterministic value of the handles in HeapConstant
nodes, different cache entries would be overwritten in this case.
The old implementation of NodeCache had a fixed limit, overwriting
entries when the cache is full. This behavior didn't really make sense,
but the hand-written hash map implementation couldn't handle arbitrary
numbers of hash collisions, so removing the limit wasn't an option either.
Thus this CL just replaces the custom hash map with a normal
std::unordered_map, that is, a ZoneUnorderedMap.
Bug: chromium:1046815
Change-Id: I95269f2b1068eb9dfe3ee2ab5cca1cb460bc8fa3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2087405
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66592}
It's probably possible to limit this to a few variables.
However, at the moment I am able to create a patch with tens of
V8_STACK_UNINITIALIZED. It seems tiny changes in functions sizes causes
significant changes in optimizer behavior.
For now I'd like just to restore the perf.
Bug: chromium:1055312, chromium:977230
Change-Id: I48efc3c872a4039b253011b70baf40763e181a20
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2087452
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66589}
This patch rolls v8 to the latest Perfetto revision. Since Perfetto has
changed the way the GN protobuf integration works, we need to make some
corresponding changes in V8.
Bug: chromium:639003
Change-Id: I263c591560503c9779bbab3ec266cfb2708fc51f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2085175
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Sami Kyöstilä <skyostil@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66583}
Enable ArrayBufferExtensions by default. The
last CL (https://crrev.com/c/2078585) that tried to enable this was
reverted because of a TSAN failure. This was fixed in
https://crrev.com/c/2078586.
Bug: v8:10064
Change-Id: I2c3e0f2614323ea1521f2085b3c2bda5b69418ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2083012
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66521}
This reverts commit 4c7c6f732c.
Reason for revert: Reverted because of TSAN failures.
Original change's description:
> [heap] Enable usage of ArrayBufferExtensions
>
> Switch the flag to true to enable ArrayBufferExtensions by default. The
> last CL (https://crrev.com/c/2065088) that tried to enable this was
> reverted because of alignment issues on ARM64
> (fixed in https://crrev.com/c/2071256).
>
> Bug: v8:10064
> Change-Id: I47f478c978094fb5038113eb452865748956b42e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2074157
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66460}
TBR=ulan@chromium.org,dinfuehr@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:10064
Change-Id: Ie15bf9858eb1f01667ea905363824cbb2bf7f884
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2078585
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66487}
Switch the flag to true to enable ArrayBufferExtensions by default. The
last CL (https://crrev.com/c/2065088) that tried to enable this was
reverted because of alignment issues on ARM64
(fixed in https://crrev.com/c/2071256).
Bug: v8:10064
Change-Id: I47f478c978094fb5038113eb452865748956b42e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2074157
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66460}
Renaming the JS-visible identifiers and strings is left for a future CL.
FinalizationGroup was renamed at Feb 2020 TC39, to better signal that if
a FinalizationRegistry dies, the finalization actions registered with it
may no longer be performed.
Bug: v8:8179
Change-Id: I0d676a71a4a67d2b7175994a67458a6158065844
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2055381
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66416}
Relanding the Fast C API code with fix for UBSan undefined behavior
issue.
Design doc:
http://doc/1SAHn7d8M7CoazTd1laVF8gduFC_ikZWiYuytrR9c4Oc/
This CL implements basic API with integer and pointer types marshaling.
What is not supported yet:
- sequences
- annotations
- floating point arguments
- 64-bit arguments
- exception handling
- InstanceOf checks for the pointer types
- functions with non-void return type
Bug: chromium:1052746
TBR=yangguo@chromium.org,mvstanton@chromium.org,neis@chromium.org,leszeks@chromium.org,verwaest@chromium.org,mslekova@chromium.org
Change-Id: Ifca9de3156cf18c9dac0d14c19f8d6a7004cad83
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2066971
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66391}
After support for ARCH_PPC was dropped, it became a subset of
ARCH_PPC64. If you compile for ppc64, then you set the ARCH_PPC64
define which also sets the ARCH_PPC define.
To be able to again support ppc (32 bit) those defines should be
split up again.
This commit only splits up the defines but does not introduce a
working ARCH_PPC variant.
Bug: v8:10102
Change-Id: I64e0749f8e5a7dc078ee7890d92e57b82706a849
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1989826
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66390}
This is the first piece of the wasm debugging prototype (besides the changes to
add/remove breakpoints in WasmModuleObject made with
e699f39cae).
This changelist adds the infrastructure for a GDB-remote stub that will be used
to manage debugging sessions via the gdb-remote protocol.
It enables the creation and termination of debugging sessions over TCP
connections that are managed in a separate thread.
The logic to actually send, receive and decode GDB-remote packets will be part
of a future changelist.
Build with: v8_enable_wasm_gdb_remote_debugging = true
Run with:
--wasm-gdb-remote Enables Wasm debugging with LLDB
(default: false)
--wasm-gdb-remote-port TCP port to be used for debugging
(default: 8765)
--wasm-pause-waiting-for-debugger Pauses the execution of Wasm code waiting
for a debugger (default: false)
--trace-wasm-gdb-remote Enables tracing of Gdb-remote packets
(default: false)
Note that most of this code is "borrowed" from the code of the Chromium NaCL
GDB-remote stub (located in Chromium in src\native_client\src\trusted\debug_stub).
Implementation details:
- class GdbServer acts as a singleton manager for the gdb-remote stub. It is
instantiated as soon as the first Wasm module is loaded in the Wasm engine.
- class GdbServerThread spawns the worker thread for the TCP connection.
- class Transport manages the socket connection, in a portable way.
- class Session represents a remote debugging session.
- class Target represents a debugging target and it’s the place where the
debugging packets will be processed and will implement the logic to debug
a Wasm engine.
Bug: chromium:1010467
Change-Id: Ib2324e5901f5ae1d855b96b99ef0995d407322b6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1923407
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Paolo Severini <paolosev@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#66379}
This reverts commit 4e11ad92f3.
Reason for revert: Signed int overflow in TestFastApiCalls in UBSan https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20UBSan/9976
Original change's description:
> [turbofan] Fast API calls from TurboFan
>
> Relanding the Fast C API code with fix for arm sim lite build.
>
> Design doc:
> http://doc/1SAHn7d8M7CoazTd1laVF8gduFC_ikZWiYuytrR9c4Oc/
>
> This CL implements basic API with integer and pointer types marshaling.
>
> What is not supported yet:
> - sequences
> - annotations
> - floating point arguments
> - 64-bit arguments
> - exception handling
> - InstanceOf checks for the pointer types
> - functions with non-void return type
>
> Bug: chromium:1052746
>
> TBR=yangguo@chromium.org,mvstanton@chromium.org,neis@chromium.org,leszeks@chromium.org,verwaest@chromium.org,mslekova@chromium.org,nicohartmann@chromium.org
>
> Change-Id: I4421ce817e3b6159a38d2cb39fb97847f128e648
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2064223
> Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> Commit-Queue: Michael Stanton <mvstanton@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66344}
TBR=mvstanton@chromium.org
Change-Id: I63bde3e0b7f92506fd8ec6d39683524bc9811aa6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1052746
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2062739
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66347}
Relanding the Fast C API code with fix for arm sim lite build.
Design doc:
http://doc/1SAHn7d8M7CoazTd1laVF8gduFC_ikZWiYuytrR9c4Oc/
This CL implements basic API with integer and pointer types marshaling.
What is not supported yet:
- sequences
- annotations
- floating point arguments
- 64-bit arguments
- exception handling
- InstanceOf checks for the pointer types
- functions with non-void return type
Bug: chromium:1052746
TBR=yangguo@chromium.org,mvstanton@chromium.org,neis@chromium.org,leszeks@chromium.org,verwaest@chromium.org,mslekova@chromium.org,nicohartmann@chromium.org
Change-Id: I4421ce817e3b6159a38d2cb39fb97847f128e648
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2064223
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66344}
This is a reland of 137bfe47c9
Original change's description:
> [arm64] Protect return addresses stored on stack
>
> This change uses the Arm v8.3 pointer authentication instructions in
> order to protect return addresses stored on the stack. The generated
> code signs the return address before storing on the stack and
> authenticates it after loading it. This also changes the stack frame
> iterator in order to authenticate stored return addresses and re-sign
> them when needed, as well as the deoptimizer in order to sign saved
> return addresses when creating new frames. This offers a level of
> protection against ROP attacks.
>
> This functionality is enabled with the v8_control_flow_integrity flag
> that this CL introduces.
>
> The code size effect of this change is small for Octane (up to 2% in
> some cases but mostly much lower) and negligible for larger benchmarks,
> however code size measurements are rather noisy. The performance impact
> on current cores (where the instructions are NOPs) is single digit,
> around 1-2% for ARES-6 and Octane, and tends to be smaller for big
> cores than for little cores.
>
> Bug: v8:10026
> Change-Id: I0081f3938c56e2f24d8227e4640032749f4f8368
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1373782
> Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66239}
Bug: v8:10026
Change-Id: Id1adfa2e6c713f6977d69aa467986e48fe67b3c2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2051958
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Cr-Commit-Position: refs/heads/master@{#66254}
This reverts commit 137bfe47c9.
Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Arm%20-%20debug/13072
Original change's description:
> [arm64] Protect return addresses stored on stack
>
> This change uses the Arm v8.3 pointer authentication instructions in
> order to protect return addresses stored on the stack. The generated
> code signs the return address before storing on the stack and
> authenticates it after loading it. This also changes the stack frame
> iterator in order to authenticate stored return addresses and re-sign
> them when needed, as well as the deoptimizer in order to sign saved
> return addresses when creating new frames. This offers a level of
> protection against ROP attacks.
>
> This functionality is enabled with the v8_control_flow_integrity flag
> that this CL introduces.
>
> The code size effect of this change is small for Octane (up to 2% in
> some cases but mostly much lower) and negligible for larger benchmarks,
> however code size measurements are rather noisy. The performance impact
> on current cores (where the instructions are NOPs) is single digit,
> around 1-2% for ARES-6 and Octane, and tends to be smaller for big
> cores than for little cores.
>
> Bug: v8:10026
> Change-Id: I0081f3938c56e2f24d8227e4640032749f4f8368
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1373782
> Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66239}
TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,neis@chromium.org,georgia.kouveli@arm.com
Change-Id: I57d5928949b0d403774550b9bf7dc0b08ce4e703
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10026
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2051952
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66242}
This change uses the Arm v8.3 pointer authentication instructions in
order to protect return addresses stored on the stack. The generated
code signs the return address before storing on the stack and
authenticates it after loading it. This also changes the stack frame
iterator in order to authenticate stored return addresses and re-sign
them when needed, as well as the deoptimizer in order to sign saved
return addresses when creating new frames. This offers a level of
protection against ROP attacks.
This functionality is enabled with the v8_control_flow_integrity flag
that this CL introduces.
The code size effect of this change is small for Octane (up to 2% in
some cases but mostly much lower) and negligible for larger benchmarks,
however code size measurements are rather noisy. The performance impact
on current cores (where the instructions are NOPs) is single digit,
around 1-2% for ARES-6 and Octane, and tends to be smaller for big
cores than for little cores.
Bug: v8:10026
Change-Id: I0081f3938c56e2f24d8227e4640032749f4f8368
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1373782
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66239}
This CL introduces, and turns on by default, compression for snapshots.
The compression is handled in SnapshotCompression, which is a new static
helper class for producing/consuming compressed SnapshotData.
To turn off snapshot compression (accomplished by removing calls of
Compress/Decompress) set the GN arg:
v8_disable_snapshot_compression = true
Bug: chromium:833361
Change-Id: If8abc3662e8473fbd0c94e443946fbea804a305e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1846066
Commit-Queue: Sam Maier <smaier@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66230}
Adds support for off-thread allocation to Script allocation and
line-end calculation.
This includes adding support for keeping/merging a script list on
the OffThreadIsolate, and adding syntactical support for logging
(in the future this could do actual logging).
Bug: chromium:1011762
Change-Id: Id90f2ad7458e90e06f6926f1fce7ef7a1ef50b3d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2046884
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66213}
Deprecate the following explicit FinalizationGroup APIs in favor of
automatic handling of FinalizationGroup cleanup callbacks:
- v8::Isolate::SetHostCleanupFinalizationGroupCallback
- v8::FinaliationGroup::Cleanup
If no HostCleanupFinalizationGroupCallback is set, then
FinalizationGroup cleanup callbacks are automatically scheduled by V8
itself as non-nestable foreground tasks.
When a Context being disposed, all FinalizationGroups that are
associated with it are removed from the dirty list, cancelling
scheduled cleanup.
This is a reland of 31d8ff7ac5
Bug: v8:8179, v8:10190
Change-Id: I704ecf48aeebac1dc2c05ea1c052f6a2560ae332
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2045723
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66208}
This reverts commit 31d8ff7ac5.
Reason for revert: https://crbug.com/v8/10190
Original change's description:
> [weakrefs] Schedule FinalizationGroup cleanup tasks from within V8
>
> Deprecate the following explicit FinalizationGroup APIs in favor of
> automatic handling of FinalizationGroup cleanup callbacks:
> - v8::Isolate::SetHostCleanupFinalizationGroupCallback
> - v8::FinaliationGroup::Cleanup
>
> If no HostCleanupFinalizationGroupCallback is set, then
> FinalizationGroup cleanup callbacks are automatically scheduled by V8
> itself as non-nestable foreground tasks.
>
> When a Context being disposed, all FinalizationGroups that are
> associated with it are removed from the dirty list, cancelling
> scheduled cleanup.
>
> Bug: v8:8179
> Change-Id: Ic09313a11dd00af36d1f698250b3d735155f45e8
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1986392
> Commit-Queue: Shu-yu Guo <syg@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66184}
TBR=ulan@chromium.org,rmcilroy@chromium.org,syg@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:8179
Change-Id: If7869e9a5841803c10e748691f019a7d28f3b62e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2043807
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66190}
Deprecate the following explicit FinalizationGroup APIs in favor of
automatic handling of FinalizationGroup cleanup callbacks:
- v8::Isolate::SetHostCleanupFinalizationGroupCallback
- v8::FinaliationGroup::Cleanup
If no HostCleanupFinalizationGroupCallback is set, then
FinalizationGroup cleanup callbacks are automatically scheduled by V8
itself as non-nestable foreground tasks.
When a Context being disposed, all FinalizationGroups that are
associated with it are removed from the dirty list, cancelling
scheduled cleanup.
Bug: v8:8179
Change-Id: Ic09313a11dd00af36d1f698250b3d735155f45e8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1986392
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66184}
... a Smi-looking type containing properly sign-extended int31 integer.
The idea is to use this kind of tagged integers for the cases where
the value is guaranteed to fit into int31. For example, feedback vector
slots is one of the candidates for using TaggedIndex representation.
Bug: v8:10047
Change-Id: Ifaa2978a5d42467578ff243dc44d327536efbe93
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1960292
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66170}
The Factory/OffThreadFactory allows us to cleanly separate object
construction behaviour between main-thread and off-thread in a
syntactically consistent way (so that methods templated on the factory
type can be made to work on both).
However, there are cases where we also have to access the Isolate, for
handle creation or exception throwing. So far we have been pushing more
and more "customization points" into the factories to allow these
factory-templated methods to dispatch on this isolate behaviour via
these factory methods. Unfortunately, this is an increasing layering
violation between Factory and Isolate, particularly around exception
handling.
Now, we introduce an OffThreadIsolate, analogous to Isolate in the same
way as OffThreadFactory is analogous to Factory. All methods which were
templated on Factory are now templated on Isolate, and methods which
used to take an Isolate, and which were recently changed to take a
templated Factory, are changed/reverted to take a templated Isolate.
OffThreadFactory gets an isolate() method to match Factory's.
Notably, FactoryHandle is changed to "HandleFor", where the template
argument can be either of the Isolate type or the Factory type (allowing
us to dispatch on both depending on what is available).
Bug: chromium:1011762
Change-Id: Id144176f7da534dd76f3d535ab2ade008b6845e3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2030909
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66101}
When ArrayBufferExtensions are enabled, sweep the extensions outside of
the GC pause concurrently to the application. The following GC will make
sure that the previous concurrent sweep operation is finished.
This CL introduces Heap::array_buffer_sweeper() that is both
responsible for tracking all extensions but also for sweeping.
Bug: v8:10064
Change-Id: I113cd625445a7d59ffb7a9de8b25a15a72b02b99
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2010107
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65984}
This was used for debugging only. The DevTools frontend now receives the
raw wasm bytes, and disassembles the functions it needed. The inspector
change was done in https://crrev.com/c/1991481.
This CL removes all code which is now dead in v8.
R=ahaas@chromium.org, bmeurer@chromium.org
Change-Id: I2d433613f1270a1ddac9af0bae8d990ef190712a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2005072
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65831}
We had a --log-instruction-stats option which would count executed instructions,
splitting them into categories. We haven't used this for some years so we're
proposing to just remove the code so it doesn't bitrot and allows further
cleanups.
Change-Id: If24d11608823e24689ea02f09f5e93b4a5acd636
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2002819
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Pierre Langlois <pierre.langlois@arm.com>
Cr-Commit-Position: refs/heads/master@{#65826}
Add the necessary V8_EXPORT_PRIVATE attributes and a few other minor
changes to make building DLLs with MSVC happy. (Note: Debug builds still
seem to be failing in Torque, but this fixes Release builds).
Bug: v8:8791
Change-Id: Ia4d5372fd1cb961e6268a2b5c089bcd17822f1e5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1996157
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65822}
Introduce OffThreadFactory with initial string construction support.
The OffThreadFactory shares with Factory a new CRTP base class, called
FactoryBase. Methods in FactoryBase return a FactoryHandle<Factory, T>
alias, which is Handle<T> for normal Factory and a new OffThreadHandle<T>
for OffThreadFactory. OffThreadHandle<T> behaves like Handle<T>, except
it stores the object in-line rather than needing external storage.
Any shared factory methods are moved into FactoryBase, which uses CRTP
to call the sub-class's AllocateRaw method (plus a few more customization
points which need Isolate access on the main thread).
Methods that used to take an Isolate or Factory, and are needed off the
main thread, are now expected to be templated on the factory type and
to use the appropriate handle.
Once an OffThreadFactory has finished being used (e.g. off-thread
compilation completed) its pages are "Published" into the main-thread
Heap. To deal with string internalization without creating a bunch of
ThinStrings, this is done in two stages:
1. 'FinishOffThread': The off-thread pages are walked to
collect all slots pointing to "internalized" strings. After this is
called it is invalid to allocate any more objects with the factory.
2. 'Publish': On the main thread, we transform these slots into
<Handle to holder, offset> pairs, then for each saved slot
re-internalize its string and update the slot to point to the
internalized string.
Bug: chromium:1011762
Change-Id: I008a694da3c357de34362bd86fe7e1f46b535d5e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1992434
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65787}
There is no particular reason that PropertyDescriptorObject should be a
subclass of FixedArray. By using a separate struct type, we get better
generated accessor functions, automatic verification, and runtime type
info, plus we save four bytes per instance.
Change-Id: If076782832aa9398806794e4ee6d019aea2f92b7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1999463
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#65756}
Simulator-specific instructions are very useful, we can:
- Place breakpoints that enable the simulator's interactive debugger, allowing
us to see registers, the stack and print JS objects.
- Enable and disable simulator tracing dynamically.
- Call printf() directly, as the simulator cannot easily support its calling
convention.
However these tools are not available when generating builtins. The reason is
that when cross-compiling, builtins are generated for real hardware but may
still run inside the simulator on the host if we have a custom snapshot. Using
the `v8_embed_script` GN option will do that for example but embedders may also
do this with the V8 API.
mksnapshot cannot tell the difference between generating code for a simulator
build and a cross-build. If we change this, we can allow us to use
simulator-specific features in builtins in simulator builds.
So in this patch we:
- Introduce a --target_is_simulator mksnapshot flag to drive the
enable_simulator_code Assembler option.
- Make sure the assembler respect the option instead of the USE_SIMULATOR
macro.
Change-Id: I7a7249f514427c1a2518a1af3679679596a72c7e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1991497
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Pierre Langlois <pierre.langlois@arm.com>
Cr-Commit-Position: refs/heads/master@{#65734}
This CL adds the ArrayBufferExtension class, which is used to track
JSArrayBuffers in a linked list. The ArrayBufferExtension is going to
replace the ArrayBufferTracker in the future but is currently behind
the v8_enable_array_buffer_extension feature flag.
When enabled, each JSArrayBuffer has a corresponding native-heap
allocated ArrayBufferExtension object. All extensions are currently
tracked in a single linked list. During marking the GC not only
marks the JSArrayBuffer but also its extension object. At the end of
mark-compact the GC iterates all extensions and removes unmarked ones.
Change-Id: I88298be255944d5ae1327c91b0d7f0fdbcd486d5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1969791
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65724}
This changes the marking worklist draining for the main thread
marker and the concurrent marker to use the following algorithm in
per-context mode:
1) Pop an object from the marking worklist.
2) Try to infer the native context that owns the objects.
This is done using a new NativeContextInferrer class.
3) If the inference is successful, then change the active marking
worklist to the worklist of the inferred native context.
4) Otherwise, keep the current active marking worklist.
5) Visit the object. Newly discovered objects will be pushed
onto the active marking worklist.
6) Account the object size for the native context corresponding
to the active marking worklist.
This is done using a new NativeContextStats class.
The main property of the algorithm is that each object for which
we couldn't infer the native context is either attributed to
the native context retaining it or is not attributed to any native
context.
Bug: chromium:973627
Change-Id: Ide4ab992275d115279f971d89ace657f4c05e176
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1981491
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65663}
In the process:
* Rework the Torque definition of ScopeInfo to enable direct
field-style access of ScopeFlags, removing some dead code in
the process.
* Allow implicit FromConstexpr conversion from subtypes of
'constexpr A' to other types. This makes it possible/easy to
convert constexpr versions of enums to other types, since the
constexpr version of the enum isn't addressable. It's namespace
isn't a valid namespace and is an implementation detail anyway.
* Cleanup LanguageMode: Language mode is now an enum and directly
mirrors the C++-side definition rather than being a Smi. With
the changes above, a new type LanguageModeSmi is introduced
that is the Smi representation of LanguageMode that can be
implicitly casted from constexpr LanguageMode values.
Change-Id: I190412f95e02905f445d149883fbf1f2b8ed757b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1977159
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65561}
The spec was normatively changed to simplify var scopes for parameter
expressions. Previously there was a per-parameter var scope in sloppy
mode so direct evals could introduce vars that did not escape the
parameter position. That semantics is complex both for the programmer
and implementation and has resulted in bugs in the past. Furthermore, it
has never been fully interoperable (with Safari in particular). The spec
was instead changed to be simpler: to have a single var scope for
sloppy evals in parameters that encloses the parameter scope and body
scope.
This simplification lets us remove expression-scope-reparenter.
Drive-by removal of stale reference to PatternRewriter.
Bug: v8:7532
Change-Id: Iade5594abe0009f7f3f6a1adad18628b17e1e779
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1962471
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65517}
Also port a few smaller functions.
Bug: v8:9838
Change-Id: I2245abe648378970a89331baa19af49f7f49359b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1961942
Commit-Queue: Joshua Litt <joshualitt@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65510}
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}
This is a reland of 5f5b4b0407
Original change's description:
> Support Intel VTune ITT API
>
> Add VTune domain support extension to use VTune Domain/Task API and
> tagging trace data for particular JS code block.
>
> How to use:
> 1. Set `"checkout_ittapi" = True` in the custom_vars section of .gclient
> file to download intel/ittapi by 'gclient sync'
> 2. Build d8 with gn build flag 'v8_enable_vtunetracemark = true'
> 3. Run d8 with flag '--enable-vtune-domain-support'
>
> The Vtune Domain/Task API can be invoked from JS to mark JS code block.
> You can mark the start of a JS task by
> vtunedomainmark(domain_name, task_name, "start")
> and the end of a task by
> vtunedomainmark(domain_name, task_name, "end")
> Tasks can nest.
>
> The VTune API (ittapi) is integrated as an external third party library
> while the v8_vtune_jit also relies on the VTune ittapi. We have another
> patch almost ready which refactors the v8_vtune_jit related code to
> depend on the third_party/ittapi. We will submit the refactored v8_vtune_jit
> code after this patch stabilized and landed.
>
>
> Contributed by fanchen.kong@intel.com
>
> Change-Id: I0ecc9dd4e1ea52545f1b6932fcdadfa7c1a6d2b2
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1938490
> Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com>
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#65409}
Change-Id: I563aa70fa2b8abe34c981af47aa7220cfc2a7edb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1963511
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65478}
Add pointer-sized field extension to the JSArrayBuffer class. Only
reserve space for this field when feature is enabled for now.
Bug: v8:10064
Change-Id: Idb6fdcdce2a048e6aed9a892bc46ce029e1119f3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1956166
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65471}
This unifies marking worklists handling by the main thread marker and
by the concurrent markers. A new class called MarkingWorklistsHolder
owns all marking worklists: the default worklist, the on-hold worklist,
and the embedder worklist. Each thread creates a local view of the
marking worklists by creating an instance of MarkingWorklists.
Additionally, marking visitors now work on MarkingWorklists instead of
accessing each worklist individually.
Besides cleaning the code up, this CL provides a bottleneck for
implementing per-context worklists.
Bug: chromium:973627
Change-Id: I52ad65c94bc0695287ba7bf4d8a814a9035e2888
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1941947
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65421}
This reverts commit 5f5b4b0407.
Reason for revert: Breaks vtunejit bot - see https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20vtunejit/32958
Original change's description:
> Support Intel VTune ITT API
>
> Add VTune domain support extension to use VTune Domain/Task API and
> tagging trace data for particular JS code block.
>
> How to use:
> 1. Set `"checkout_ittapi" = True` in the custom_vars section of .gclient
> file to download intel/ittapi by 'gclient sync'
> 2. Build d8 with gn build flag 'v8_enable_vtunetracemark = true'
> 3. Run d8 with flag '--enable-vtune-domain-support'
>
> The Vtune Domain/Task API can be invoked from JS to mark JS code block.
> You can mark the start of a JS task by
> vtunedomainmark(domain_name, task_name, "start")
> and the end of a task by
> vtunedomainmark(domain_name, task_name, "end")
> Tasks can nest.
>
> The VTune API (ittapi) is integrated as an external third party library
> while the v8_vtune_jit also relies on the VTune ittapi. We have another
> patch almost ready which refactors the v8_vtune_jit related code to
> depend on the third_party/ittapi. We will submit the refactored v8_vtune_jit
> code after this patch stabilized and landed.
>
>
> Contributed by fanchen.kong@intel.com
>
> Change-Id: I0ecc9dd4e1ea52545f1b6932fcdadfa7c1a6d2b2
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1938490
> Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com>
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#65409}
TBR=machenbach@chromium.org,hpayer@chromium.org,verwaest@chromium.org,shiyu.zhang@intel.com
Change-Id: I44a6e5b1aa32e753ae41966ed321ed787cc752f8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1960291
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65410}
Add VTune domain support extension to use VTune Domain/Task API and
tagging trace data for particular JS code block.
How to use:
1. Set `"checkout_ittapi" = True` in the custom_vars section of .gclient
file to download intel/ittapi by 'gclient sync'
2. Build d8 with gn build flag 'v8_enable_vtunetracemark = true'
3. Run d8 with flag '--enable-vtune-domain-support'
The Vtune Domain/Task API can be invoked from JS to mark JS code block.
You can mark the start of a JS task by
vtunedomainmark(domain_name, task_name, "start")
and the end of a task by
vtunedomainmark(domain_name, task_name, "end")
Tasks can nest.
The VTune API (ittapi) is integrated as an external third party library
while the v8_vtune_jit also relies on the VTune ittapi. We have another
patch almost ready which refactors the v8_vtune_jit related code to
depend on the third_party/ittapi. We will submit the refactored v8_vtune_jit
code after this patch stabilized and landed.
Contributed by fanchen.kong@intel.com
Change-Id: I0ecc9dd4e1ea52545f1b6932fcdadfa7c1a6d2b2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1938490
Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65409}
This CL adds build flags for pluging in third-party heap implementation.
Additionally it redirects allocation requests when the flags are on.
Bug: v8:9533
Change-Id: I7ef300ca9dc2b5f498a13211611ae4b4b3df8fa0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1928860
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65114}
This CL adds one undeclared "torque_base" header, as well as two
headers that are generated by the Torque compiler itself.
R=tebbi@chromium.org
Bug: v8:9810
Change-Id: I76c552d897da08b47c03efba959b348f0c2e5843
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1918256
Auto-Submit: Simon Zünd <szuend@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65009}
utils.h itself is fairly large and contains lots of unrelated functions
as well as having a fair number of dependencies itself, so this splits
bounds checking and bit field operations into their own headers in base
and replaces uses of utils.h with the more appropriate header where
possible. (Also fixes some cases where other headers were previously
brought in transitively).
Bug: v8:9810, v8:8912
Change-Id: I76c53f953848a57e2c5bfad6ce45abcd6d2a4f1b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1916604
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64983}
This reverts commit 64c09f67d2.
Reason for revert: We already support up to max int32 sized TypedArrays
regardless of the smi size, so the chromium:1009439 issue should no longer be a blocker.
Original change's description:
> [ptr-compr] Temporarily disable 31 bit Smis on 64-bit architectures
>
> The reason is to unblock M79 blocked by chromium:1009439 while full
> solution is not ready yet.
>
> This CL will be reverted after the M79 branch point.
>
> Bug: v8:9767, chromium:1009439
> Change-Id: I5302d86fe953ecd94d9a4bba0d29c807b7b9d703
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1862554
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64286}
Bug: v8:9767, chromium:1009439
Change-Id: I92c43c8b27feb4f99e948bca03551e3e0316f2b5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1916692
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64971}
This creates a .tq file in src/objects for each src/objects/*.h file
with Torque-defined classes and moves the object definitions and
corresponding helpers/macros there.
In addition, we create files convert.tq and cast.tq in src/builtins
to move the casts and conversions to.
Since Torque-generated .cc files end up as .o files in the same
directory, there cannot be two .tq files of the same name. Thus it
was necessary to rename src/builtins/arguments.tq and
src/builtins/string.tq to not clash with the new files in src/objects.
This is a mechanical change that only moves code.
Design doc: http://doc/1fh4OUMjQMnQdJm3aiAPXQUNdgbQugkRGdJzDh8hmyzk
Bug: v8:9861 v8:9810 v8:7793
Change-Id: I9c54cb50f32b9ae0fb41752199515133eb59ea5c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1910100
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64892}
This fixes MSVC Windows builds that were broken due to a missing deps
definition.
Bug: v8:9954
Change-Id: I19c5112226caadae6a0221acee7bcf19cf0abbc8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1906379
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64873}
Using proper register (RIP) on this platform.
Change-Id: Iaa0a25e328bd82c152db0ef3632523fd7d621020
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1857221
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64863}
Since the turbo_decompression_elimination flag is removed, there
are several methods in machine-type.h that get simplified, e.g
TypeCompressedTaggedPointer() can be replaced by just
"TaggedPointer()".
Also Removing the creation of Change to/from Compressed nodes.
Removing these Change nodes' logic is left to a follow-up CL.
Bug: v8:7703
Change-Id: Iff1f9aa8361189cf781a26317fd342b942fd5aa4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1897537
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64834}
Implement the possibility to revisit the same function in the
serializer using equality of its arguments.
Bug: v8:7790
Change-Id: I609a6009bf503e378e50d0b32c6f1c13721d2557
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1863198
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64683}
This is a reland of 4a16305b65
The original CL adjust only one part of the stack check, namely the
comparison of the stack pointer against the stack limit in generated code.
There is a second part: Runtime::kStackGuard repeats this check to
distinguish between a stack overflow and an interrupt request.
This second part in runtime must apply the offset just like in generated
code. It is implemented in this reland by the StackCheckOffset operator
and a new StackGuardWithGap runtime function.
Original change's description:
> [compiler] Optionally apply an offset to stack checks
>
> The motivation behind this change is that the frame size of an optimized
> function and its unoptimized version may differ, and deoptimization
> may thus trigger a stack overflow. The solution implemented in this CL
> is to optionally apply an offset to the stack check s.t. the check
> becomes 'sp - offset > limit'. The offset is applied to stack checks at
> function-entry, and is set to the difference between the optimized and
> unoptimized frame size.
>
> A caveat: OSR may not be fully handled by this fix since we've already
> passed the function-entry stack check. A possible solution would be to
> *not* skip creation of function-entry stack checks for inlinees.
>
> This CL: 1. annotates stack check nodes with the stack check kind, where
> kind is one of {function-entry,iteration-body,unknown}. 2. potentially
> allocates a temporary register to store the result of the 'sp - offset'
> in instruction selection (and switches input registers to 'unique'
> mode). 3. Applies the offset in code generation.
>
> Drive-by: Add src/compiler/globals.h for compiler-specific globals.
>
> Bug: v8:9534,chromium:1000887
> Change-Id: I257191c4a4978ccb60cfa5805ef421f30f0e9826
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1762521
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63701}
Bug: v8:9534, chromium:1000887
Change-Id: I71771c281afd7d57c09aa48ea1b182d01e6dee2a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1822037
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64634}
This is the first step in unification of concurrent and main thread
marking visitors. The new MarkingVisitorBase will become a base class
for all marking visitors and will remove the existing code duplication.
This is a refactoring without behavior change.
Subsequent CL will change the main thread marking visitor to derive
from the new base class.
Bug: chromium:1019218
Change-Id: I3d47030d396e0ba6706882fbd922bbcac46181b2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1886920
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64632}
The new API with v8::BackingStore should be used instead as explained in
https://docs.google.com/document/d/1sTc_jRL87Fu175Holm5SV0kajkseGl2r8ifGY76G35k
This also relaxes the pre-condition for [Shared]ArrayBuffer::Detach to
not require externalization first.
Bug: v8:9380, v8:9908
Change-Id: Idd119fcd28be84a2fae74ae86f7381fd997766f5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1859628
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64625}
This rearranges the TurboProp pipeline to avoid the need for a second
schedule of the graph. To do this, it moves the final schedule creation
before effect-control-linearization (which used a temporary schedule
previously, and with TurboFan). It then enables the block updater in the
graph assembler for effect control linearization and does select and
memory lowering in a new ScheduledMachineLowering phase to maintain
this existing schedule during these lowering passes.
BUG=v8:9684
Change-Id: I6a7790b010f8b152dd01d85aa95ee5d4f99087a5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1847351
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64537}
This CL integrates the "v8_nosnapshot" source set into the "mksnapshot"
binary. The "mksnapshot" binary is the last use-site after unconditionally
enabling snapshot and embedded builtins.
Bug: v8:8519
Change-Id: I8e737e10a3f7729e18ac71733b811bf399ebf330
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1873685
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64494}
... and refactor String.prototype.substring.
This is done to simplify cleaning up callers of ConvertToRelativeIndex()
in a follow-up CL.
This CL also introduces Smi-overflow friendly helper function
ClampToIndexRange(index: JSAny, min: uintptr, max: uintptr): uintptr
which can be used in other String builtins as a better alternative to
NumberMin(NumberMax(value, min), max)
pattern.
Bug: v8:8996, v8:4153
Change-Id: Ie1bb5ab305ebf851c033d109ffe9e6afb9418274
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1872392
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64463}
This is a reland of f5611402f7
We had to revert due to branch cut. The A/B experiment wasn't done yet.
Original change's description:
> [ptr-compr][arm64] Temporarily enable pointer compression on arm64
>
> ... and make sure that the arm64 ptr-compr bots proceed testing V8 without
> pointer compression in order to keep testing the other config.
>
> Commented out the 'extra' variant since it was crashing. Opened a bug
> regarding that: https://bugs.chromium.org/p/v8/issues/detail?id=9568
>
> Similar to x64's https://chromium-review.googlesource.com/c/v8/v8/+/1607654
>
> Bug: v8:7703
> Change-Id: Ifd46b029bab34524f9f536dcdbd1574f2ddcbf37
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1724216
> Reviewed-by: Tamer Tas <tmrts@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63019}
Bug: v8:7703
Change-Id: I28726f534dfd17dd695a3ba5653873368e7a44b0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1872403
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64459}
This CL removes the 'v8_enable_embedded_builtins' GN argument and sets
the 'V8_EMBEDDED_BUILTIN' define unconditionally.
Removing the now obsolete 'define' and corresponding C++ code will be
done in a separate CL.
R=machenbach@chromium.org
Bug: v8:8519
Change-Id: Ibaa3e958121931c0ce14baf48ad401fab87c5337
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1864929
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64456}
The natives blob was deprecated in V8 7.8. This CL removes all related
functionality, including:
- Build system support, i.e.: generation of natives_blob.bin and the
v8_extra_library_files gn flag.
- Related scripts (js2c.py, concatenate-files.py).
- Related API functions (SetNativesDataBlob,
InitializeExternalStartupData).
- Natives bootstrapping logic.
- The InternalArray type (previously exposed through natives).
- Other natives-exposed builtins.
- Inlining of these builtins.
- The dedicated 'uncached external one byte string' type.
Step 1 landed in https://crrev.com/c/1824944.
Step 2 landed in https://crrev.com/c/1835536.
Step 3 (this CL) removes these all functionality related to natives
support in V8.
Bug: v8:7624
Change-Id: Ice6c2662781efe8417231805276476d32bc5a625
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1844771
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64446}
This reverts commit ca1259fcac.
Reason for revert: Branch was cut and we don't want the flag flip shipping.
Original change's description:
> [ptr-compr][arm64] Temporarily enable pointer compression on arm64
>
> ... and make sure that the arm64 ptr-compr bots proceed testing V8 without
> pointer compression in order to keep testing the other config.
>
> Bug: v8:7703
> Change-Id: I0017345273d5328d95a338064dd80b44974c1c53
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1844780
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64132}
TBR=machenbach@chromium.org,ishell@chromium.org,tmrts@chromium.org,solanes@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:7703
Change-Id: I67c244e583893bb1062dbaa610c9c470fbfb9e40
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1868610
Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64374}
The DecompressionOptimizer aims to avoid adding the root in AnyTagged
or TaggedPointer loads. For the TaggedSigned case, we already solve it
in instruction selection.
The new phase will run only when pointer compression is enabled. For
the moment, it's also requires FLAG_turbo_decompression_elimination to
be false. This latter flag is only temporary to test out the
implementation.
The phase needs to be run when Machine are present in the graph, i.e
at the very end of the pipeline. Also, since this phase may change
the load's MachineRepresentation from Tagged to Compressed, it's best
to run it as late as possible in order to keep the phases that know
about Compressed MachineRepresentation to a minimum.
As an example, if we Load a Tagged value only to Store it back again
(i.e Load -> Store nodes, with the Load being the Store's value) we
don't need to fully decompress it since the Store will ignore the
top bits.
Bug: v8:7703
Change-Id: I6b4aec203ab8cbb540b2513cabb1e2a5691ce938
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1859615
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64358}
This is a reland of 1c56974f2a
This is a plain reland of the original CL. The original CL was speculatively
reverted, but ended up not being the cause for bot failures.
Original change's description:
> Unconditionally enable snapshot builds and remove 'v8_use_snapshot'
>
> This CL removes 'v8_use_snapshot' and the usages of the implied
> V8_USE_SNAPSHOT define. One test runner unittest was updated to use the
> "asan" variant instead of the now obsolete "no_snap" variant.
>
> Related chromium CL: https://crrev.com/c/1796325.
>
> Bug: v8:8531
> Change-Id: I5da7c9f8e9110fe7bc0f4e4f821bcb7f7d98f927
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1784282
> Commit-Queue: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Tamer Tas <tmrts@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Nico Weber <thakis@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64290}
TBR=thakis@chromium.org,machenbach@chromium.org,mstarzinger@chromium.org,jgruber@chromium.org,tmrts@chromium.org,szuend@chromium.org
Bug: v8:8531
Change-Id: Id75a802279238138f7aefec62e0b6425a5acc08d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1864649
Reviewed-by: Simon Zünd <szuend@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64305}
This reverts commit 1c56974f2a.
Reason for revert: Causes several bots to timeout, e.g. https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20debug/27945
Original change's description:
> Unconditionally enable snapshot builds and remove 'v8_use_snapshot'
>
> This CL removes 'v8_use_snapshot' and the usages of the implied
> V8_USE_SNAPSHOT define. One test runner unittest was updated to use the
> "asan" variant instead of the now obsolete "no_snap" variant.
>
> Related chromium CL: https://crrev.com/c/1796325.
>
> Bug: v8:8531
> Change-Id: I5da7c9f8e9110fe7bc0f4e4f821bcb7f7d98f927
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1784282
> Commit-Queue: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Tamer Tas <tmrts@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Nico Weber <thakis@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64290}
TBR=thakis@chromium.org,machenbach@chromium.org,mstarzinger@chromium.org,jgruber@chromium.org,tmrts@chromium.org,szuend@chromium.org
Change-Id: I4024d818877e534b9f7908a2d14f33dca35b5924
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8531
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1862572
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64293}
This CL removes 'v8_use_snapshot' and the usages of the implied
V8_USE_SNAPSHOT define. One test runner unittest was updated to use the
"asan" variant instead of the now obsolete "no_snap" variant.
Related chromium CL: https://crrev.com/c/1796325.
Bug: v8:8531
Change-Id: I5da7c9f8e9110fe7bc0f4e4f821bcb7f7d98f927
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1784282
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64290}
The reason is to unblock M79 blocked by chromium:1009439 while full
solution is not ready yet.
This CL will be reverted after the M79 branch point.
Bug: v8:9767, chromium:1009439
Change-Id: I5302d86fe953ecd94d9a4bba0d29c807b7b9d703
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1862554
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64286}
Design doc:
https://docs.google.com/document/d/1ZU6rCvF2YHBGMLujWqqaxlPsjFfjKDE9C3-EugfdlAE/edit
Changes from the design doc:
- Changed to use 'class' declarations rather than 'type' declarations
for things that need instance types but whose layout is not known to
Torque. These declarations end with a semicolon rather than having a
full set of methods and fields surrounded by {}. If the class's name
should not be treated as a class name in generated output (because
it's actually a template, or doesn't exist at all), we use the
standard 'generates' clause to declare the most appropriate C++ class.
- Removed @instanceTypeName.
- @highestInstanceType became @highestInstanceTypeWithinParentClassRange
to indicate a semantic change: it no longer denotes the highest
instance type globally, but only within the range of values for its
immediate parent class. This lets us use it for Oddball, which is
expected to be the highest primitive type.
- Added new abstract classes JSCustomElementsObject and JSSpecialObject
to help with some range checks.
- Added @lowestInstanceTypeWithinParentClassRange so we can move the new
classes JSCustomElementsObject and JSSpecialObject to the beginning of
the JSObject range. This seems like the least-brittle way to establish
ranges that also include JSProxy (and these ranges are verified with
static assertions in instance-type.h).
- Renamed @instanceTypeValue to @apiExposedInstanceTypeValue.
- Renamed @instanceTypeFlags to @reserveBitsInInstanceType.
This change introduces the new annotations and adds the ability for
Torque to assign instance types that satisfy those annotations. Torque
now emits two new macros:
- TORQUE_ASSIGNED_INSTANCE_TYPES, which is used to define the
InstanceType enumeration
- TORQUE_ASSIGNED_INSTANCE_TYPE_LIST, which replaces the non-String
parts of INSTANCE_TYPE_LIST
The design document mentions a couple of other macro lists that could
easily be replaced, but I'd like to defer those to a subsequent checkin
because this one is already pretty large.
Bug: v8:7793
Change-Id: Ie71d93a9d5b610e62be0ffa3bb36180c3357a6e8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1757094
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64258}
This reverts commit 12b22b5198.
Reason for revert: Experiment finished.
Original change's description:
> Disable --instruction-scheduling for mksnapshot
>
> This is an experiment to see the memory/performance impact.
>
> Bug: v8:9775
> Change-Id: I2ae61ae8bb5c6c1c55436e96c4b2d8201cbf4739
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1832177
> Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64062}
TBR=mvstanton@chromium.org,neis@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:9775
Change-Id: Ife556af5f8c09c25f20756a9b2ac940cb74359e2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1855983
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64239}
instead of plain uint32_t as entry. This provides some type safety,
because the compiler will check that we are not mixing up indexes
and entries. It also paves the way to consistently using size_t for
TypedArray indexes.
Bug: v8:4153
Change-Id: Ie0eb63693c871efda9860d3d288896819868b66a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1852765
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64236}
