This reverts commit ab6aeaa106.
Revert "[vm/compiler] Speed up the compiler part which deals with kernel reading up in DEBUG mode"
This reverts commit b316210d94.
Reason for revert: regression of snapshot sizes (DNO-599).
Original change's description:
> [vm/kernel] Use GC-tracked ExternalTypedData/TypedDataView for kernel buffers
>
> Until now we often leaked kernel buffers (e.g. hot reload buffers) because various
> objects were referencing ExternalTypedData objects pointing into the middle of
> c-allocated memory. This made it impossible for the GC to determine when the last
> reference is gone.
>
> This CL ensures that the actual buffers are *always* made available via
> ExternalTypedData and any inner pointers into it are created via TypedDataViews.
>
> The embedder guarantees to the free kernel buffers it has provided to:
> - Dart_CreateIsolateFromKernel
> - Dart_LoadScriptFromKernel
> - Dart_LoadLibraryFromKernel
> - Dart_SetDartLibrarySourcesKernel
> on isolate shutdown.
>
> All other kernel buffers will get a finalizer attached, which ensures the
> kernel buffers get freed by the GC once they are no longer referenced:
> - Kernel blobs for expression evaluation
> - Kernel blobs for Hot-Reload
> - Kernel blobs for cc tests
>
> Fixes https://github.com/dart-lang/sdk/issues/33973
> Fixes https://github.com/dart-lang/sdk/issues/36857
> Issue https://github.com/dart-lang/sdk/issues/37030
>
> Change-Id: I1cc410c94c0f4b229413e793728a261afcb10aaf
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103130
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
> Commit-Queue: Martin Kustermann <kustermann@google.com>
TBR=kustermann@google.com,rmacnak@google.com
# Not skipping CQ checks because original CL landed > 1 day ago.
Change-Id: I49715d2400f4a5c8806b7d6a2912b7258f671a0a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/104343
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Auto-Submit: Alexander Markov <alexmarkov@google.com>
Until now we often leaked kernel buffers (e.g. hot reload buffers) because various
objects were referencing ExternalTypedData objects pointing into the middle of
c-allocated memory. This made it impossible for the GC to determine when the last
reference is gone.
This CL ensures that the actual buffers are *always* made available via
ExternalTypedData and any inner pointers into it are created via TypedDataViews.
The embedder guarantees to the free kernel buffers it has provided to:
- Dart_CreateIsolateFromKernel
- Dart_LoadScriptFromKernel
- Dart_LoadLibraryFromKernel
- Dart_SetDartLibrarySourcesKernel
on isolate shutdown.
All other kernel buffers will get a finalizer attached, which ensures the
kernel buffers get freed by the GC once they are no longer referenced:
- Kernel blobs for expression evaluation
- Kernel blobs for Hot-Reload
- Kernel blobs for cc tests
Fixes https://github.com/dart-lang/sdk/issues/33973
Fixes https://github.com/dart-lang/sdk/issues/36857
Issue https://github.com/dart-lang/sdk/issues/37030
Change-Id: I1cc410c94c0f4b229413e793728a261afcb10aaf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103130
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
This is a temporary workaround for VM crashes when using observatory
in bytecode modes. Crashes heppen when CollectTokenPositionsFor
tries to access kernel AST (via kernel_offset()) but there isn't one.
Change-Id: I4c4dbb84653957c2f276f62216c12b58d2d666c6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/99084
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
This change replaces kernel AST declarations of fields and functions
with bytecode declarations.
Size of dilp files is reduced by 11-12%.
Startup latency:
Time to the first full frame: 1.945s -> 1.687s
FinalizeClass: 554ms -> 277ms
FinishClassLoading: 296ms -> 156ms
There are following regressions in bytecode mode, which will be fixed
in future:
* dart:mirrors are not supported yet (implementation of mirrors relies
on reading kernel AST in certain cases).
As the result, lib_2/mirrors/* tests fail.
* native extensions are not supported yet (annotations on libraries
and classes in AST are cleaned up as they could reference members
which are now removed from AST).
As the result, standalone_2/entrypoints_verification_test test fails.
* language_2/spread_collections/const_error_test/* tests fail
due to https://github.com/dart-lang/sdk/issues/36286.
Change-Id: I5130f401fd7b84038b136136e7ccc1a6e51b6cea
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/97561
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
This change extracts code which reads kernel in order to get
covariance attributes of parameters into a separate function.
This removes code duplication and makes it easier to hook up
reading of covariance attributes from bytecode in future.
Change-Id: Ia19caf3edaf45df9e0bb1bdc715fac21d26788dc
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/96560
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Auto-Submit: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Samir Jindel <sjindel@google.com>
This is a reland of 1a4cff1bd4
Original change's description:
> [VM] Remove unused flags
>
> Remove the following flags which are always ON
> --strong
> --reify_generic_functions
>
> and these flags which are not applicable anymore
> --error-on-bad-override
> --error-on-bad-type
> --enable-type-checks
>
> Change-Id: I6e1aeb68e663953f4ae49ca94ea0daa87b661900
> Reviewed-on: https://dart-review.googlesource.com/c/79431
> Commit-Queue: Siva Annamalai <asiva@google.com>
> Reviewed-by: Alexander Markov <alexmarkov@google.com>
> Reviewed-by: Régis Crelier <regis@google.com>
Change-Id: Ib4452c22fb05eed38820708abb648939e03b1df0
Reviewed-on: https://dart-review.googlesource.com/c/84923
Reviewed-by: Siva Annamalai <asiva@google.com>
Remove the following flags which are always ON
--strong
--reify_generic_functions
and these flags which are not applicable anymore
--error-on-bad-override
--error-on-bad-type
--enable-type-checks
Change-Id: I6e1aeb68e663953f4ae49ca94ea0daa87b661900
Reviewed-on: https://dart-review.googlesource.com/c/79431
Commit-Queue: Siva Annamalai <asiva@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
This reverts commit 2de63ac01c.
Reason for revert: This triggers shutdown deadlocks for some reason:
#0 0xf7782cd9 __kernel_vsyscall
#1 0xf7753d0b pthread_cond_wait@@GLIBC_2.3.2
#2 0x0108a515 dart::Monitor::WaitMicros(long long)
#3 0x0108a467 dart::Monitor::Wait(long long)
#4 0x00fe9048 dart::KernelIsolate::Shutdown()
#5 0x00f99ae4 dart::Dart::Cleanup()
#6 0x01278fce Dart_Cleanup
#7 0x00dd347e dart::bin::main(int, char**)
#8 0x00dd3d64 main
#9 0xf745caf3 __libc_start_main
#10 0x00dd2021 _start
TID 30443:
#0 0xf7782cd9 __kernel_vsyscall
#1 0xf7531ee6 epoll_wait
#2 0x00ddab61 dart::bin::EventHandlerImplementation::Poll(unsigned int)
#3 0x00dfb2d4 dart::bin::ThreadStart(void*)
#4 0xf774ff72 start_thread
#5 0xf753143e __clone
TID 30444:
#0 0xf7782cd9 __kernel_vsyscall
#1 0xf7753d0b pthread_cond_wait@@GLIBC_2.3.2
#2 0x0108a515 dart::Monitor::WaitMicros(long long)
#3 0x0108a467 dart::Monitor::Wait(long long)
#4 0x012484d8 dart::BackgroundCompiler::Run()
#5 0x01248a37 dart::BackgroundCompilerTask::Run()
#6 0x0112203a dart::ThreadPool::Worker::Loop()
#7 0x01121efe dart::ThreadPool::Worker::Main(unsigned int)
#8 0x01089e73 dart::ThreadStart(void*)
#9 0xf774ff72 start_thread
#10 0xf753143e __clone
Original change's description:
> [VM] Add @pragma annotations on Field, make @pragma annotations work generally
>
> Currently the @pramga('vm:exact-result-type') annotation only works if
> the function is a recognized method. This change changes that to make
> the VM just look if a function has the annotation (no matter if it's
> also in the list of recognized methods or not).
>
> Furthermore this CL adds a "has_pragma" bit to [Field] objects, similar
> to how we have it on [Function]/[Class]es. This allows annotating
> fields with types, as we do with function return types.
>
> Furthermore this CL lets the type propgagator use
> @pragma('vm:exact-result-type') annotations to narrow the [CompileType]
> set on [LoadFieldInstr]s.
>
> Since the @pragma is a general feature, this CL moves the
> `Function::FindPragma()` to `Library::FindPragma` (which is where any
> other metadata lookup happens). We also let the `FindPragma` accept any
> of Class/Function/Field objects.
>
> Furthermore this CL adds a bailout if we try to evaluate metadata in
> the background compiler, since the background compiler is not allowed
> to execute generated code. The bailout should trigger a re-compilation
> on the mutator thread.
>
> Furthermore the `FindPragma()` function is fixed to handle the case
> when the evaluation of the metadata results in e.g. a language error.
> In this case we simply claim to not have found a pragma annotation.
>
> Issue https://github.com/dart-lang/sdk/issues/31954
>
> Change-Id: I0900a80d5ae0f3e8d09baf13cba1b20dd974df31
> Reviewed-on: https://dart-review.googlesource.com/c/84037
> Commit-Queue: Martin Kustermann <kustermann@google.com>
> Reviewed-by: Alexander Markov <alexmarkov@google.com>
> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
TBR=vegorov@google.com,kustermann@google.com,alexmarkov@google.com,sjindel@google.com
Change-Id: Ic0d22d32b0eea3a76ec245cabab0006f97ca1b05
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/84622
Reviewed-by: Martin Kustermann <kustermann@google.com>
Currently the @pramga('vm:exact-result-type') annotation only works if
the function is a recognized method. This change changes that to make
the VM just look if a function has the annotation (no matter if it's
also in the list of recognized methods or not).
Furthermore this CL adds a "has_pragma" bit to [Field] objects, similar
to how we have it on [Function]/[Class]es. This allows annotating
fields with types, as we do with function return types.
Furthermore this CL lets the type propgagator use
@pragma('vm:exact-result-type') annotations to narrow the [CompileType]
set on [LoadFieldInstr]s.
Since the @pragma is a general feature, this CL moves the
`Function::FindPragma()` to `Library::FindPragma` (which is where any
other metadata lookup happens). We also let the `FindPragma` accept any
of Class/Function/Field objects.
Furthermore this CL adds a bailout if we try to evaluate metadata in
the background compiler, since the background compiler is not allowed
to execute generated code. The bailout should trigger a re-compilation
on the mutator thread.
Furthermore the `FindPragma()` function is fixed to handle the case
when the evaluation of the metadata results in e.g. a language error.
In this case we simply claim to not have found a pragma annotation.
Issue https://github.com/dart-lang/sdk/issues/31954
Change-Id: I0900a80d5ae0f3e8d09baf13cba1b20dd974df31
Reviewed-on: https://dart-review.googlesource.com/c/84037
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
TFA is improved to detect if a method was called using dynamic selector,
was ever called not via this, and whether the tear-off was taken.
This information is used to remove parameter type checks in AOT.
Less accurate selector-based analysis, which was used previously to get
this information, is now used only if TFA is disabled.
Also, precompiler is improved to omit method extractors and implicit
closure functions if analysis proved that tear-off is not taken.
Flutter gallery snapshot size: -0.8%
Change-Id: Iec01257dfdc78104752104df14e2ce078d326a96
Reviewed-on: https://dart-review.googlesource.com/77005
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Samir Jindel <sjindel@google.com>
This way requests to compile won't end prematurely after reading
bytecode if interpreter is enabled.
Change-Id: Ic06cae98ea65bc4656ef491fbd306d34b0e1ef4c
Reviewed-on: https://dart-review.googlesource.com/75628
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
In certain cases StreamingFlowGraphBuilder was used not for building
flow graph, but as an advanced kernel reader. This CL extracts all such
functionality from StreamingFlowGraphBuilder and revises all such uses.
StreamingFlowGraphBuilder constructors without FlowGraphBuilder are
removed. After this CL StreamingFlowGraphBuilder is only used to build
flow graph, as intended.
Change-Id: I69b08e24d37f8f2f336bee85334af11be1639b24
Reviewed-on: https://dart-review.googlesource.com/64821
Reviewed-by: Régis Crelier <regis@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
This CL continues refactoring aimed at isolating StreamingFlowGraphBuilder.
StreamingFlowGraphBuilder dependency is removed from classes
* StreamingConstantEvaluator (it still depends on FlowGraphBuilder)
* ConstantHelper
* SimpleExpressionConverter
and several methods in object.cc.
StreamingConstantEvaluator and ConstantHelper are moved from
kernel_binary_flowgraph{.h, .cc} to a new source file
constant_evaluator{.h, .cc}. StreamingConstantEvaluator is renamed
to ConstantEvaluator.
KernelFingerprintHelper and KernelSourceFingerprintHelper are moved to
a new source file kernel_fingerprints{.h, .cc}.
Instances of kernel::FlowGraphBuilder no longer contain back reference
to a StreamingFlowGraphBuilder. In order to drop this circular dependency
TranslateFinallyFinalizers() is moved from FlowGraphBuilder to
StreamingFlowGraphBuilder.
Change-Id: Id550d22b3567dea9512328a900935bd6145a8107
Reviewed-on: https://dart-review.googlesource.com/64463
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Zach Anderson <zra@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
This reverts commit cd4e5ee866.
Reason for revert: This broke the 32bit Linux SDK build.
Original change's description:
> Keep the line starts delta encoded in the VM heap as well.
>
> The line starts in the kernel binary are delta encoded. By decoding and
> storing them as int32 values, we are unneccesarily bloating the VM heap.
> This change keeps the line starts delta encoded in the VM heap as well.
> This brings down the core snapshot size by 275KB (but will of course
> affect the debug performance.)
>
> Bug:
> Change-Id: I77769efe7339484096d04c37180367adf96e51f4
> Reviewed-on: https://dart-review.googlesource.com/22304
> Commit-Queue: Siva Chandra <sivachandra@google.com>
> Reviewed-by: Siva Annamalai <asiva@google.com>
TBR=sivachandra@google.com,asiva@google.com
Change-Id: I6e78bd510de7033d8583c089c00b5b261fdf69c1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/24800
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
The line starts in the kernel binary are delta encoded. By decoding and
storing them as int32 values, we are unneccesarily bloating the VM heap.
This change keeps the line starts delta encoded in the VM heap as well.
This brings down the core snapshot size by 275KB (but will of course
affect the debug performance.)
Bug:
Change-Id: I77769efe7339484096d04c37180367adf96e51f4
Reviewed-on: https://dart-review.googlesource.com/22304
Commit-Queue: Siva Chandra <sivachandra@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Devirtualization optimization now adds metadata to kernel AST instead
of transforming nodes to Direct* ones. The direct call metadata
provides information about checking receiver for null, while
Direct* kernel nodes do not support null checking.
VM's kernel binary loader is extended to extract arbitrary metadata
from kernel binaries and keep it for flow graph builder.
Kernel flow graph builder is extended to take direct call metadata
into account and generate CheckNull/StaticCall instructions
for devirtualized PropertyGet, PropertySet and MethodInvocation nodes.
Issue: https://github.com/dart-lang/sdk/issues/30480
Change-Id: I57f56fbf4a8981d33b1571c0d93105cf8ca71d76
Reviewed-on: https://dart-review.googlesource.com/12260
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Before this change, each function and field had its own kernel data blob
in the VM heap. With this change, the entire kernel data of a library is
stored as one single blob in the VM heap. Functions and fields store an
offset which points to the kernel data, specific to them, in that single
blob.
The pointer to the kernel data for a library is saved in two places:
1. With the library objects themselves.
2. With all the patch classes of the library.
3. With the patch classes created during hot reload.
Change-Id: Ie03e738c4d20f16056a5ef04341b75506fda9c60
Bug:
Reviewed-on: https://dart-review.googlesource.com/6601
Commit-Queue: Siva Chandra <sivachandra@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
New folder structure (nested under vm/):
- compiler/
- jit/ - JIT specific code
- aot/ - AOT specific code
- backend/ - all middle-end and back-end code (IL, flow graph)
- assembler/ - assemblers and disassemblers
- frontend/ - front ends (AST -> IL, Kernel -> IL)
compiler/README.md would be the documentation root for the compiler
pipeline
Bug: https://github.com/dart-lang/sdk/issues/30575
Change-Id: I2dfd9688793bff737f7632ddc77fca766875ce36
Reviewed-on: https://dart-review.googlesource.com/2940
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
There already exists a class named "Reader" in the "kernel" namespace
which reads bytes from a kernel binary. The class KernelLoader
(KernelReader before this change) creates VM heap objects and populates
them.
R=kmillikin@google.com
Review-Url: https://codereview.chromium.org/3010543002 .
Mostly stream kernel_reader, i.e. the code that sets up the libraries,
classes, methods etc.
Mostly because it still takes a "Program" ast node, and looks at the
"Library" ast nodes to get their kernel offset in the binary.
Currently the scripts (containing breakable points etc) are also created
from the ast nodes.
The rest is now streamed.
This also means that more ast visitors could be deleted.
R=kmillikin@google.com
Review-Url: https://codereview.chromium.org/2931813002 .
The canonical name table is copied into a typed data array in the VM's
heap. The encoding is the same as in the binary except that the
integer indexes are fixed-size.
Canonical names are now integer indexes instead of objects allocated
in the C++ heap.
BUG=
R=jensj@google.com, vegorov@google.com
Review-Url: https://codereview.chromium.org/2853423002 .
Copy the Kernel string offsets into a uint32 array in the VM's heap.
This avoids allocating small string objects with new and avoids having
a table of the canonical strings.
Instead of an offset and a size, strings are now represented as
indexes into the string table in the heap. The start offset of string
N is found at byte offset N*4 because it is a uint32, and the end
offset is found at byte offset (N+1)*4. The strings themselves are
just integer indexes instead of pointers.
In the stream flow graph builder, string access is all random access.
R=jensj@google.com, vegorov@google.com
Review-Url: https://codereview.chromium.org/2852943003 .
Ryan Macnak