Previously, compiler::target::Foo::InstanceSize(intptr_t length)
definitions were hand-written and compiler::target::Foo::InstanceSize()
were often defined using the size of UntaggedFoo for array-like objects.
This results in an unnecessary code duplication and discrepancy
between Foo::InstanceSize() which returns 0 and
compiler::target::Foo::InstanceSize() which returns size of the header.
This change adds ARRAY_SIZEOF variant to runtime_offsets_list.h
and switches array-like objects to auto-generated InstanceSize methods.
Also, this change strengthens assertions around host and target
values of InstanceSize() and NextFieldOffset() being the same
unless DART_PRECOMPILER is defined (which may do cross-compilation).
Stronger assertions flushed out a few discrepancies between
runtime_api.h and object.h, which are also fixed in this change.
TEST=ci
Change-Id: I9f67c6a71b9300af5e656fdc70f6a3e341c1d029
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196345
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Tess Strickland <sstrickl@google.com>
While deserializing AOT snapshot, Code objects which do not contain
valuable information besides entry point and stack maps are discarded
and not allocated on the heap (they are replaced with
StubCode::UnknownDartCode()).
PC -> Code/CompressedStackMaps lookup is implemented using a separate
table (InstructionsTable).
Flutter gallery in release-sizeopt mode:
Heap size of snapshot objects: arm -26.89%, arm64 -27.68%
Large Flutter application in release mode with --dwarf-stack-traces:
Heap size of snapshot objects: -24.3%.
Discarded Code objects: 72.5% of all Code objects.
Issue: https://github.com/dart-lang/sdk/issues/44852.
TEST=existing tests; "--dwarf_stack_traces --no-retain_function_objects
--no-retain_code_objects" mode is enabled for a few tests.
Change-Id: I5fe3e283630c8e8f4442319d5dcae38d174dd0d8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/189560
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
This statistics is printed with --print_snapshot_sizes_verbose.
It is useful in order to figure out how much memory is consumed by
program structure objects without running an application.
TEST=manual testing with --print_snapshot_sizes_verbose
Change-Id: I6eeae7b303ecaf44806deb0f532058492c1d5808
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/181444
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Currently we have things called XPtr which are not what you get from ptr().
Old world:
handle->raw() returns RawObject* (tagged)
raw_obj->ptr() returns RawObject* (untagged)
After 6fe15f6df9:
handle->raw() returns ObjectPtr
obj_ptr->ptr() returns ObjectLayout*
New world:
handle->ptr() returns ObjectPtr
obj_ptr->untag() returns UntaggedObject*
TEST=ci
Change-Id: I6c7f34014cf20737607caaf84979838300d12df2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149367
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
As part of making the compiler and other subsystems independent
of `Isolate` we have to move various state from `Isolate` to
`IsolateGroup`.
The class_table and object_store were already moved to `IsolateGroup`.
This CL only replaces usages of `Isolate::{object_store,class_table}`
with the equivalent in `IsolateGroup`.
Issue https://github.com/dart-lang/sdk/issues/36097
TEST=Pure refactoring - relying on existing test coverage.
Change-Id: I34a0682d715b054d6c5faff077a513980f59a348
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177126
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
The layout of WeakProperty is defined in C++ instead of Dart. Add missing recognition of its accessors so the compiler can use direct field access instead of always going through natives. Compare LinkedHashMap.
Change the sentinel for WeakProperty lists to object null so that no special constructor is needed.
TEST=ci
Bug: https://github.com/dart-lang/sdk/issues/44333
Change-Id: I8686383053c2c345c972b6615b514a1381e79fda
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/175001
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
An address containing an object header is sometimes interpreted as a object slot due to array truncation and concurrent marking/sweeping. Always accessing it as a word assuages TSAN that it won't be subject to tearing, and allows for the removal of TSAN suppressions from header access. In turn, this will allow TSAN to verify some acquire/release header accesses.
TEST=tsan
Bug: https://github.com/dart-lang/sdk/issues/44091
Change-Id: I7bf6449bf7dfeabd9db76e4bb37456e3be2d5124
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172861
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
This CL extends SubtypeTestCache entries with an additional slot that
contains the type being checked, to allow for future uses where
different runtime types can flow through a single checkpoint. This
change is separated from those future uses to determine the impact of
these changes only.
Thus, most SubtypeTestCache checks require the type as an additional
argument, and now the destination type register in TypeTestABI is now
untouched in SubtypeTestCache checks. Since there are currently no plans
for a dynamic InstanceOf test, the one argument SubtypeTestCache is left
unchanged.
Until we add cases in later CLs where the type can differ at the same
AssertAssignable instruction, we could check the type last since it is
currently guaranteed to be the same each time. However, we instead check
it after the instance, which is when it should be checked once we have
AssertAssignable instructions with types only known at runtime. This
avoids having to change it later, but also ensures the measured impact
of these changes can be compared to the impact of later changes.
In addition, this CL also unifies most of the code used by
GenerateInstanceOf (and also GenerateAssertAssignable via
GenerateInlineInstanceof on IA32). This is possible since register use
changes in the helper functions has eliminated the need to push the
instantiator and function type argument registers from TypeTestABI on
non-X64 architectures. By unifying these methods, we ensure that all
architectures appropriately set TypeTestABI::kDstTypeReg when necessary.
TEST=Existing tests on all architectures, change in object_test.cc.
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Change-Id: I5d56de156e175758b3299ef1c776b848ac11f779
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172503
Reviewed-by: Régis Crelier <regis@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Since the transition from Source based to Kernel based frontend to the
Dart VM, we have not supported callable redirecting factories. This has
caused all removed code in this CL to be unused and untested!
The support for reifing redirection related information would mainly be
used by embedder / dart:mirrors. Right now its not used by anyone and
the kernel support was never implemented.
I suggest we remove the unused and untested code until a decision has
been made that we actually want to support it - in which case it can be
properly implemented, possibly by re-using some of the deleted code in
this CL.
TEST=CL removes unused code, no test result changes.
Change-Id: I7ed45c85b4efcc1e81ce44cbe08bb555e52101b9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/166853
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
This partially undoes changes from acbd51c08
because they are now known to increate RSS of AOT
compiled applications.
This CL also removes length adjustment code from *String::InstanceSize
which tried to ensure that external string fits into a non-external
string. This code is no longer necessary because APIs for
string externalization were removed.
TEST=covered by the existing tests
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Change-Id: Ife4f16d6939d98bb7966121b5899cef9f0121220
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170080
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
These checks are now performed in the dynamic closure call dispatcher.
To avoid having to create type argument vectors (TAVs) for default type
arguments at runtime, we cache a compile-time created TAV in the
ClosureData for the closure function which is retrieved by the
dispatcher when needed.
We also keep an associated packed field of information that can also be
determined at compile time:
* Whether the cached TAV needs instantiation or can share its
instantiator or function type arguments.
* The number of parent type parameters.
The former allows the generated IL to keep the invariant that the
InstantiateTypeArguments instruction (and the runtime entry it calls) is
only used for uninstantiated TAVs.
Also changes the destination name to an Value input for the
AssertSubtype instruction and adds handling for non-constant types and
names in that instruction's backend.
Additional changes:
* Adds new slots for ClosureData, Function, and TypeArguments.
* Adds a new kUnboxedUint8 representation (needed for
TypeParameterLayout::flags_, which is of type uint8_t).
* Extends LoadField to handle uint8_t unboxed native fields.
* Adds BoxUint8 for boxing unboxed uint8_t values.
Code size impact on Flutter gallery in release mode:
* arm7: total +0.08%, vmisolate: +0.56%, isolate: +0.42%,
readonly: -0.04%, instructions: -0.03%
* arm8: total +0.12%, vmisolate: +0.56%, isolate: +0.42%,
readonly: -0.002%, instructions: +0.03%
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Bug: https://github.com/dart-lang/sdk/issues/40813
Change-Id: I5a7de27a17e3119e27752bd0d10e1c6bc1b52a16
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/158844
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
Before, we only wrapped the Instructions payloads in an
InstructionsSection in precompiled snapshots with bare instructions mode
enabled. This CL changes that to always add an InstructionsSection
wrapper in precompiled snapshots, even when not in bare instructions
mode, and moves all the information from the old ImageHeader object into
the InstructionsSection object instead. Note that in non-bare mode, the
InstructionsSection has no payload, and the Instructions objects follow
the InstructionsSection object instead of being contained by it.
This CL also wraps all implementations of AssemblyImageWriter and
SnapshotTextObjectNamer methods in a single DART_PRECOMPILER ifdef
block, since we only generate assembly in precompiled mode. This
removes the need for the smaller DART_PRECOMPILER ifdef blocks scattered
across the AssemblyImageWriter method implementations.
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Change-Id: I3676fb5c6675845463707acbbb4759a465cfa342
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/165563
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
This CL adds a new PAYLOAD_SIZEOF specification to
runtime_offsets_list.h which defines InstanceSize methods given an
method name to invoke to get the header size (i.e., the size of
the object portion before the payload).
It uses this new specification to create appropriate InstanceSize()
methods for objects written to read-only sections of snapshots,
instead of needing separate size calculations for SIMARM_X64.
It adds more methods to Instructions to avoid special casing for bare
instructions mode. It also removes the special casing for SIMARM_X64,
serializing all read-only objects in the same manner even when not
in a crossword situation.
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Change-Id: Ie3e4009f4bc03688998c32281e42fa22a255731d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/165501
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Since we've run out of room for more fields in the Image object header
on 64-bit architectures, the serializer instead creates an ImageHeader
object for precompiled snapshots that is placed at the start of text
segments. The new ImageHeader object contains the following information:
* The offset of the BSS segment from the text segment, previously
stored in the Image object header.
* The relocated address of the text segment in the dynamic shared
object. Due to restrictions when generating assembly snapshots, this
field is only set for ELF snapshots, and so it can also be used to
detect whether a snapshot was compiled to assembly or ELF.
* The offset of the build ID description field from the text segment.
* The length of the build ID description field.
We replace the BSS offset in the Image object header with the offset of
the ImageHeader object within the text segment, so that we can detect
when a given Image has an ImageHeader object available.
There are no methods available on ImageHeader objects, but instead the
Image itself controls access to the information. In particular, the
relocated address method either returns the relocated address
information from the ImageHeader object or from the initialized BSS
depending on the type of snapshot, so the caller need not do this work.
Also, instead of returning the raw offset to the BSS section and having
the caller turn that into an appropriate pointer, the method for
accessing the BSS segment now returns a pointer to the segment.
Bug: https://github.com/dart-lang/sdk/issues/43274
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Change-Id: I15eae4ad0a088260b127f3d07da79374215b7f56
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/163207
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Leaf runtime calls a silently clobbering R23 and R25 registers, which
causes bugs when these calls happen from write barriers (which are not
expected to clobber anything outside of R25).
We introduce a special helper class to handle saving and restoring
necessary registers.
The bug originally reported by Joe Lin <zuojian.lzj@alibaba-inc.com>
who proposed a fix[1]. This CL builds on top of that fix and tries to
make it more safe by forcing users to use a more strict API.
[1] https://dart-review.googlesource.com/c/sdk/+/162300
TEST=vm/dart/write_barrier_register_clobber_test
Change-Id: I93e0a13a3c4c38ad28210b35750a66e615e3e44a
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/162191
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Before this, we had to use PRECOMP_NO_CHECK() for any entries that
involved field offsets that came after NOT_IN_PRECOMPILED() fields,
because the offsets would differ between JIT and AOT. That removed
the check in dart.cc that the offsets match, but that just meant
that precompiled code that used these offsets were wrong.
One possible workaround is to just lift any field definitions whose
offset might be used in precompiled code before any NOT_IN_PRECOMPILED()
defined fields, but this means otherwise unnecessary changes in the
Layout classes.
Instead, just fix the runtime offset generation/retrieval by splitting
the list of offsets into two parts: offsets common to all modes and
offsets only valid in JIT mode. While this complicates the code that
generates and imports these offsets, it ensures that our code generation
actually uses the right offsets for the target mode.
In addition, by doing this split we can add checks for uses of JIT-only
offsets when in precompiled mode. Adding these checks found some uses of
JIT-only field offsets in code compiled in precompiled mode. (These
uses may have been benign if the stubs that included the uses were never
called in the precompiled runtime, but now there's explicitly a check
for precompiled mode around these uses.)
Also remove the unused ARRAY_STRUCTFIELD type from offset lists.
Change-Id: I083ab5997d3a5245b5f1487b614b62faee47d405
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/155780
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Loading unit metadata is expanded to create an object representing each loading unit, and each library to reference the loading unit it is a part of.
To be used at compile-time to help assign objects to snapshots.
To be used at runtime to track which units have been loading and the base objects for cross-snapshot references.
Bug: https://github.com/dart-lang/sdk/issues/41974
Change-Id: Icd3fa95ffd5949bd8f7f84a6f750c4c515de0dba
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151865
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
This includes support for calling Dart_PropagateError in native code
when doing FFI calls, and catching uncaught exceptions with Dart_IsError
when doing FFI callbacks.
The support for Dart_PropagateError adds a catch entry to the FFI
trampoline, which prevents inlining these trampolines in AOT. This
regresses the FfiCall benchmarks by 1-2% in AOT.
In addition, Dart_PropagateError requires maintaining a bit whether we
entered native/VM code from generated code through FFI or not. That way
we can do the proper transition on the exception path. When entering
generated code, we store this bit on the stack, right after the entry
frame.
Design: http://go/dart-ffi-handles
Issue: https://github.com/dart-lang/sdk/issues/36858
Issue: https://github.com/dart-lang/sdk/issues/41319
Change-Id: Idfd7ff69132fb29cc730931a4113d914d4437396
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/145591
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
* AssertAssignable should not be generated for top types according to
IsTopTypeForSubtyping().
* Arguments descriptor should be passed when calling field initializer
from InitLateInstanceField/InitLateFinalInstanceField stubs.
If interpreter is enabled, InterpretCall stub expects to find
arguments descriptor in a register. Also, lazy compilation stub
may save arguments descriptor in a slot visited by GC, so arguments
descriptor register should contain a GC-safe value.
Fixes https://github.com/dart-lang/sdk/issues/41807
Change-Id: Ia33ed1bc57007d674799fb4453c8ab4841037211
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/147383
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
When using C++ value types to represent tagged pointers, we cannot use forward declarations for tagged pointers. This helps to break include cycles when attempting to keep IsXYZ predicates as tagged pointer member functions.
class_id.h also seems like a more natural place for these predicates, which were written before there was a class_id.h.
Change-Id: I0677560a794ed084d10f844606e202feb0c3820a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/144321
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Make them form its own source set (libdart_compiler) and completely exclude
them from AOT runtime targets.
Previously we had some inconsistencies, with some files were using
DART_PRECOMPILED_RUNTIME to fully or partially exclude either contents
from their headers or from implementation, while other files did nothing
and relied on linker to throw their contents away.
This change tries to address this inconsistency.
A follow up change would include a check in most compiler headers which
would prohibit to use them while building AOT runtime.
Change-Id: Ief11b11cbc518b301d3e93fce80580a31bbad151
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142993
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
In particular, don't serialize a function if its code is used by the
dispatch table, but there's no need for the function object itself
at runtime like dynamic lookup or dynamic invocation forwarders.
However, just because the owning function is not needed at runtime,
it may be used during serialization for things like assembly label
creation. Thus, instead of just clearing out the Code's owner field,
we add a new WeakSerializationReference (WSR) object whose target is
the original contents of the owner field. The WSR allows the
serializer to access the original owner, but also signals to the
serializer that the target should not be serialized in AOT snapshots
unless there are additional strong (non-WSR) references.
If no strong references are found, then the references to the WSR
in the snapshot are replaced with a reference to a WSR that only
contains the class ID of the original target. The serializer creates
only one WSR per class ID.
If strong references are found, then the target is still serialized.
In this case, the WSR is dropped entirely and any reference to it is
replaced with a direct reference to the serialized target. Thus, WSRs
only exist in the precompiled runtime for targets with no strong
references.
Changes on the Flutter gallery in release mode:
arm7: total size -1.10%, isolate size -6.08%
arm8: total size -1.16%, isolate size -6.09%
Bug: https://github.com/dart-lang/sdk/issues/41052
Change-Id: I5b435ca71ef85f50fe3484789087471a91aa4fe2
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/137104
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
VM should treat type parameters with kUndertermined and kNonNullable
nullability in the same way (both can be instantiated with a legacy
type and even nullable Null in a legacy library).
So kUndertermined nullability can be converted to kNonNullable
when reading kernel, and code which handles kUndertermined nullability
can be simplified.
Change-Id: Ib5dbd92ae9ee3754f3e64629e0a03952aadfd287
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/137862
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
This makes it possible to use FutureOrCid in the VM and efficiently
test if type is FutureOr. This also makes it possible to use predicates
like IsTopType very early during VM bootstrapping (before reusable
handles are initialized). The latter is needed to correctly select
type testing stub for top types.
Change-Id: I4c482143c0ebaafa1c8e13e95dc6f20e3af7059a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/136000
Reviewed-by: Régis Crelier <regis@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Now, when writing an AOT snapshot in bare instructions mode, only
the actual instructions in the RawInstructions payload are serialized
instead of the entire RawInstructions object.
Since there are no longer RawInstructions objects in these AOT
snapshots, we also change how Code objects are serialized. Instead
of just containing a reference to the RawInstructions object, we
serialize two pieces of information: where the instructions
payload for this Code object begins and whether there was a single
entry for the instructions payload. (To save space, the single
entry bit is serialized as the low order bit of the unchecked
offset, which was already being serialized).
While we also need the length of the instructions payload, we
approximate it for all but the last Code object by subtracting
the next Code object's payload start from this Code object's
payload start. For the last Code object, we assume it extends
to the end of the instructions image.
Changes on flutter gallery in release mode:
armv7: instructions size -2.70%, total size -1.73%
armv8: instructions size -6.04%, total size -3.63%
Fixes https://github.com/dart-lang/sdk/issues/38451.
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm_x64-try,vm-kernel-precomp-android-release-arm64-try,vm-kernel-precomp-android-release-arm_x64-try,vm-kernel-precomp-mac-release-simarm64-try,vm-kernel-precomp-win-release-x64-try
Change-Id: Ia0a5c4e5e47c956776dc62503da38ec55a143c04
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134325
Commit-Queue: Teagan Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
This reverts commit 7475c637c3.
Reason for revert: Breakage on simarm_x64 (and thus arm_x64)
Original change's description:
> [vm/aot] Remove object wrapping of bare instructions for AOT snapshots.
>
> Now, when writing an AOT snapshot in bare instructions mode, only
> the actual instructions in the RawInstructions payload are serialized
> instead of the entire RawInstructions object.
>
> Since there are no longer RawInstructions objects in these AOT
> snapshots, we also change how Code objects are serialized. Instead
> of just containing a reference to the RawInstructions object, we
> serialize two pieces of information: where the instructions
> payload for this Code object begins and whether there was a single
> entry for the instructions payload. (To save space, the single
> entry bit is serialized as the low order bit of the unchecked
> offset, which was already being serialized).
>
> While we also need the length of the instructions payload, we
> approximate it for all but the last Code object by subtracting
> the next Code object's payload start from this Code object's
> payload start. For the last Code object, we assume it extends
> to the end of the instructions image.
>
> Changes on flutter gallery in release mode:
> armv7: instructions size -2.66%, total size -1.68%
> armv8: instructions size -5.81%, total size -3.49%
>
> Fixes https://github.com/dart-lang/sdk/issues/38451.
>
> Change-Id: Ia458e8d99bae18f5c3b6e849df2519027f06f574
> Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm_x64-try,vm-kernel-precomp-android-release-arm64-try,vm-kernel-precomp-android-release-arm_x64-try,vm-kernel-precomp-mac-release-simarm64-try,vm-kernel-precomp-win-release-x64-try
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/131067
> Commit-Queue: Teagan Strickland <sstrickl@google.com>
> Reviewed-by: Martin Kustermann <kustermann@google.com>
TBR=kustermann@google.com,rmacnak@google.com,sstrickl@google.com
Change-Id: If2c8ca6b0993211b2509b275af7ff11a8fa2baa3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-release-x64-try, vm-kernel-precomp-linux-release-simarm-try, vm-kernel-precomp-linux-release-simarm64-try, vm-kernel-precomp-linux-release-simarm_x64-try, vm-kernel-precomp-android-release-arm64-try, vm-kernel-precomp-android-release-arm_x64-try, vm-kernel-precomp-mac-release-simarm64-try, vm-kernel-precomp-win-release-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134322
Reviewed-by: Teagan Strickland <sstrickl@google.com>
Commit-Queue: Teagan Strickland <sstrickl@google.com>
Now, when writing an AOT snapshot in bare instructions mode, only
the actual instructions in the RawInstructions payload are serialized
instead of the entire RawInstructions object.
Since there are no longer RawInstructions objects in these AOT
snapshots, we also change how Code objects are serialized. Instead
of just containing a reference to the RawInstructions object, we
serialize two pieces of information: where the instructions
payload for this Code object begins and whether there was a single
entry for the instructions payload. (To save space, the single
entry bit is serialized as the low order bit of the unchecked
offset, which was already being serialized).
While we also need the length of the instructions payload, we
approximate it for all but the last Code object by subtracting
the next Code object's payload start from this Code object's
payload start. For the last Code object, we assume it extends
to the end of the instructions image.
Changes on flutter gallery in release mode:
armv7: instructions size -2.66%, total size -1.68%
armv8: instructions size -5.81%, total size -3.49%
Fixes https://github.com/dart-lang/sdk/issues/38451.
Change-Id: Ia458e8d99bae18f5c3b6e849df2519027f06f574
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm_x64-try,vm-kernel-precomp-android-release-arm64-try,vm-kernel-precomp-android-release-arm_x64-try,vm-kernel-precomp-mac-release-simarm64-try,vm-kernel-precomp-win-release-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/131067
Commit-Queue: Teagan Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
This reverts commit 9eb531bde4.
Reason for revert: Bots are red. Some tests are failing.
https://ci.chromium.org/p/dart/builders/ci.sandbox/vm-kernel-precomp-obfuscate-linux-release-x64/6039https://ci.chromium.org/p/dart/builders/ci.sandbox/vm-kernel-precomp-android-release-arm_x64/957
Original change's description:
> [vm] Add support for real unboxed floating point fields in AOT
>
> Non-nullable floating point fields (double, Float32x4, Float64x2)
> are fully unboxed in their classes.
>
> A bitmap for each class was added to the shared class table in order to keep
> track of the pointers of the classes. Since all classes in Flutter Gallery
> have less than 64 fields, the bitmap is represented by a 64 bit integer and
> fields whose offset is more than 64 words are not unboxed.
>
> The instance sizes and field offsets might change between target and host
> in cross-compilation, since the number of words used to store unboxed fields
> may differ.
>
> dart-aot Xeon
>
> SplayLatency -4.62%
> SplayHarderLatency -4.17%
> NavierStokes -2.20%
> Tracer 8.72%
> ParticleSystemPaint 2.90%
> NBodySIMD 8.35%
> NBody 25.59%
>
> With hack TFA to make doubles in Rect/Offset/Size classes in flutter non-nullable:
>
> flutter arm-v8:
>
> gallery total size: -1%
>
> matrix_utils_transform_rect_perspective -16.70% (less is better)
> matrix_utils_transform_rect_affine -31.82% (less is better)
> matrix_utils_transform_point_perspective -24.90% (less is better)
> matrix_utils_transform_point_affine) -27.26% (less is better)
> rrect_contains_bench -4.719% (less is better)
>
> Change-Id: I9ae09c9c3167d99f9efd071a92937aa51093fd1d
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/131824
> Commit-Queue: Victor Agnez Lima <victoragnez@google.com>
> Reviewed-by: Martin Kustermann <kustermann@google.com>
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
> Reviewed-by: Samir Jindel <sjindel@google.com>
TBR=kustermann@google.com,rmacnak@google.com,sjindel@google.com,victoragnez@google.com
Change-Id: Ic73858f6adb7f55c4129d4f46ff4731b378cb634
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134020
Reviewed-by: Zichang Guo <zichangguo@google.com>
Commit-Queue: Zichang Guo <zichangguo@google.com>
Non-nullable floating point fields (double, Float32x4, Float64x2)
are fully unboxed in their classes.
A bitmap for each class was added to the shared class table in order to keep
track of the pointers of the classes. Since all classes in Flutter Gallery
have less than 64 fields, the bitmap is represented by a 64 bit integer and
fields whose offset is more than 64 words are not unboxed.
The instance sizes and field offsets might change between target and host
in cross-compilation, since the number of words used to store unboxed fields
may differ.
dart-aot Xeon
SplayLatency -4.62%
SplayHarderLatency -4.17%
NavierStokes -2.20%
Tracer 8.72%
ParticleSystemPaint 2.90%
NBodySIMD 8.35%
NBody 25.59%
With hack TFA to make doubles in Rect/Offset/Size classes in flutter non-nullable:
flutter arm-v8:
gallery total size: -1%
matrix_utils_transform_rect_perspective -16.70% (less is better)
matrix_utils_transform_rect_affine -31.82% (less is better)
matrix_utils_transform_point_perspective -24.90% (less is better)
matrix_utils_transform_point_affine) -27.26% (less is better)
rrect_contains_bench -4.719% (less is better)
Change-Id: I9ae09c9c3167d99f9efd071a92937aa51093fd1d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/131824
Commit-Queue: Victor Agnez Lima <victoragnez@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Samir Jindel <sjindel@google.com>
Some raw objects have fields that do not exist in
dart_precompiled_runtime, making the instance size of such objects
smaller. The offsets extractor should therefore generate different
offsets for the precompiled runtime in order to reflect those
differences.
Change-Id: I367e20744fe5b2f8ffaba03bd19b2c74a422c750
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/133064
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Victor Agnez Lima <victoragnez@google.com>
Alexander Markov