The RecordCoverage instruction has an A/E encoding. The A argument
is the type of coverage being recorded, whereas the E argument is
the logical index into the coverage array for updating whether that
source position has been hit.
Also adds new metadata to the bytecode component for the coverage
arrays associated with bytecode containing RecordCoverage instructions
and a new runtime entry for lazily allocate the coverage array for
an interpreted function when needed.
The type of coverage is encoded in the RecordCoverage instruction,
despite being redundant with the information in the coverage array, so that checking whether that type of coverage is currently enabled at
runtime doesn't require either accessing the coverage array (which may
be lazily allocated), forcing allocation of the coverage array just to
discover that type of coverage is currently disabled, or reading the
serialized bytecode component to avoid that forced allocation.
------
Other changes:
Source reporting now treats unexecuted interpreted functions when
not forcing compilation as if they were uncompiled native functions,
so that the source report from running the same code gives the same
result whether using the interpreter or the native compiler.
Bytecode closures are no longer skipped in source reports. Previously
any closure without a context scope was skipped, but bytecode closures
don't have those.
TEST=vm/cc/SourceReport_Coverage
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Change-Id: I7557e5dd4c98331c7ca2f5c867dd5f6d03e9d756
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/501520
Reviewed-by: Alexander Markov <alexmarkov@google.com>
In the VM, factory constructors always had an extra "type arguments"
parameter, even if class is not generic. Factory constructor bodies
were using class type parameters instead of function type parameters.
This results in extra code when calling non-generic factories
which is slightly inefficient in terms of code size and performance.
Also, it creates an additional complexity throughout the system as
factories should be special cased in many places.
This change removes artificial "type arguments" parameter, treating
factory constructors basically as static methods. This matches
kernel AST representation.
TEST=ci
Change-Id: I957583cb2ce9a3c408699880a04036e06b01dd31
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/501762
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Also allows the --print-classes flag to be used in the AOT runtime if
dynamic modules are enabled and crashes with an appropriate error
message if class finalization fails when loading a member from bytecode.
TEST=co19/LibTest/math/Rectangle co19/LibTest/math/MutableRectangle
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Change-Id: I1921aa0189eb587cd4658c592a779be190af092e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/495724
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
This is a reland of commit 88496ba1c3
Fixes on top of the original change:
* Closure layout is changed to avoid gap between fixed fields and
variable-length elements on compressed pointers architecture.
This gap was causing crashes in the GC when scanning closure
objects.
* pkg/vm_snapshot_analysis/test/instruction_sizes_test is fixed
on arm64 by decreasing threshold for detecting size changes.
Original change's description:
> [vm,dart2bytecode,modular_aot] Variable-length closure objects
>
> Extend closure objects with variable number of elements to capture.
> This is needed to support capturing multiple independent contexts
> after capturing is computed in the front-end.
>
> The following fixed Closure fields are moved into variable-length
> elements:
> - delayed type arguments;
> - instantiator type arguments;
> - function type arguments;
> - context.
>
> Number of elements and presence/indices of various type arguments
> are encoded into the new length_and_flags field in the Closure.
>
> Most closure objects don't need any of the type arguments so this
> change will reduce average Closure object size.
TEST=ci
Issue: https://github.com/dart-lang/sdk/issues/61572
Issue: https://github.com/dart-lang/sdk/issues/61635
Change-Id: I8685e632e2d0832766ecdc470f3cf9a6b880de48
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/494243
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Tess Strickland <sstrickl@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
Extend closure objects with variable number of elements to capture.
This is needed to support capturing multiple independent contexts
after capturing is computed in the front-end.
The following fixed Closure fields are moved into variable-length
elements:
- delayed type arguments;
- instantiator type arguments;
- function type arguments;
- context.
Number of elements and presence/indices of various type arguments
are encoded into the new length_and_flags field in the Closure.
Most closure objects don't need any of the type arguments so this
change will reduce average Closure object size.
TEST=ci
Issue: https://github.com/dart-lang/sdk/issues/61572
Issue: https://github.com/dart-lang/sdk/issues/61635
Change-Id: I7ca5cec0fd8725c432a01d51781fb14e803997dd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/489482
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
Reviewed-by: Tess Strickland <sstrickl@google.com>
Adds a new isInvisible flag for both FunctionDeclarations and
ClosureDeclarations and sets it if the function or closure declaration
is annotated with @pragma('vm:invisible'). This way, function visibility
is appropriately recorded even if options.emitAnnotations is false.
The bytecode reader checks for the isInvisible flag when reading
FunctionDeclarations and ClosureDeclarations and appropriately
sets the is_visible flag for the Function object accordingly.
TEST=pkg/dart2bytecode/test/bytecode_generator_test
vm/dart/invisible_function_pragma_test
Cq-Include-Trybots: luci.dart.try:vm-dyn-linux-debug-x64-try
Change-Id: If435afbe5e74adc022ce064784b6b3e5e8a88164
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/486381
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
If the evaluation expression function is for an expression in the scope
of a generic function with a parameter whose type includes one of its
type parameters, then the graph for the parameter type will contain a
self reference to the evaluation expression function.
Normally, this self reference would be resolved via the scoped_function_
field. However, while scoped_function_class_ is set to the class containing the expression evaluation function (as expected),
if ReadObject() encounters that class, it returns the "real" class
the evaluation expression should be evaluated in. This means the
self-reference isn't detected.
Add an additional check for the right name/class for the expression
evaluation function.
TEST=pkg/vm_service/test/evaluate_function_type_parameters_test
Fixes: https://github.com/dart-lang/sdk/issues/61948
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Change-Id: Id04735059d00d964a8f00885857d3255c18ecf99
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/464520
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Auto-Submit: Tess Strickland <sstrickl@google.com>
The front end may desugar some const constructors into procedures, so be
less strict with what is expected in the list of const constructors.
Also updates SourceReport to check all Functions with is_const() true
against the collected const constructor hits and not just Constructors.
TEST=ci
Fixes: https://github.com/dart-lang/sdk/issues/61947
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Change-Id: I092938eeeb0459de9b3d95400a538ec6528c43fe
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/462442
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Also the pending objects list can be added to while handling other
pending objects, so the length of the list must be re-retrieved on each
iteration.
TEST=pkg/vm_service/test/coverage_leaf_function_test.dart
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Change-Id: I1089515f3e967ddc41fb82ce9f0541a81b9529d2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/452784
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Add a flag to SourceFile which is true if the associated script
contains a list of covered const constructors, and serialize said
list if true.
Delay reading and resolving the list of covered const constructors in
the bytecode reader until code is read.
Update usage counters for interpreted functions in Entry instructions.
Fix up cases where SourceReport assumed compiled code as appropriate.
Remaining:
* Record call and assert coverage information if the current isolate
group has coverage enabled.
* Record branch coverage information if the current isolate group
has branch coverage enabled.
TEST=pkg/vm_service pkg/dart2bytecode
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Change-Id: I14b6ffba1e175993e992c0fe939473557303bfeb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/449900
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Instead of using the computed LocalVarDescriptors when the
frame is interpreted, use the LocalVariableInfo in the serialized
bytecode to find which Scope is currently active.
Add printing of local variable information to the bytecode
disassembler.
TEST=pkg/vm_service/test
Change-Id: I7bd15056e4e2a947ad16ffb83a50447c2ba59994
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/449340
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Detects yield points in Debugger::IsAtAsyncJump for bytecode by seeing
if the currently executing instruction is a direct call to an await
or yield compiled stub.
Adds a ResumptionBreakpointHandler runtime entry that is called
during Interpreter::Resume() if the current isolate has resumption
breakpoints.
Similarly, all the places where a DebugCheck could be emitted if
debugging stops are requested now include an explicit source position
emission when source positions are requested but debugger stops are not,
to ensure the debugger has appropriate information.
Fixes CompareTopDartFrameTo returning kSelf for non-top frames when
the top frame was interpreted but the stepping frame was not or
vice versa.
TEST=pkg/vm_service/test
Change-Id: I88cdc37cf745f30e8dfb6b14c19fc9b2c4cbaf2d
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/446300
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Pragmas on local functions are used internally by FFI.
TEST=ci
Change-Id: I3ffb9984d8fcd943b22a98746faa915b2ce7c9fa
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/446121
Reviewed-by: Tess Strickland <sstrickl@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Postpone loading of Code and ConstantPool objects during hot reload
until ReloadPhase4CommitFinish in order to avoid creating
constants too early, before class table is switched to use new classes
(otherwise heap would contain a mix of objects with new and old
layouts).
TEST=ci (vm/cc/IsolateReload)
Change-Id: I602987d194c5eb00b2e2a0e070dcd7b50cea0212
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/441660
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Also, support reading local variables information from bytecode.
TEST=pkg/vm_service
Change-Id: Iab482316891f0e474af0011e9b1765c4e8312bc9
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/437281
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Profiler does not allow 2 distinct Bytecode objects to use the same
range of bytecode, as it needs to map PC to a Bytecode unambiguously.
So this change removes reuse of the field initializer bytecodes for
a field getter (in case of const fields).
TEST=pkg/vm_service/test/get_perfetto_cpu_samples_rpc_test
Change-Id: I758286f6f4fcfe2e2169bbc19ae233594e263522
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/436740
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
dart2bytecode can optionally add source position information
(including line starts) to the generated bytecode
(when '--bytecode-options=source-positions' flag is specified).
If bytecode has source positions, they are now shown in stack traces
involving interpreter frames.
TEST=ci
Change-Id: I1ae3326bac21201040be32c712514e71e96f51e2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/433760
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
* Never unbox fields loaded from bytecode as interpreter works with
boxed fields only.
* Ensure classes are allocate-finalized in AllocateObject
runtime entry as interpreter may allocate instances of certain
built-in classes (such as _Closure, _Double etc) without prior
allocate-finalization.
* Fix type arguments vector in constant instances when class doesn't
have type parameters but extends a generic class (so its instances
have type arguments vector).
TEST=ci
Change-Id: I488287f84572a79ca7f1fddbd53aed1c3a038cea
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/412981
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
When creating function types, VM takes number of parent function type
arguments into account. So function types with distinct number of
parent function type arguments should not be merged in the bytecode
object table and should be represented as distinct types.
TEST=language/mixin/type_parameter_inference_test
Fixes https://github.com/dart-lang/sdk/issues/59633
Change-Id: I9c8b0923c52b1b95628ff8daa3bbfa135c559912
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/398500
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
* Switch UInt32 from big-endian to little-endian encoding.
* Reorder object kinds, constant tags, type tags and constant pool tags.
* Reorder field and function flags.
* Cleanup yield point marker from source positions.
TEST=ci
Change-Id: I05ee940b6393a478831af11ac93fee9ec1441c4e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/384040
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
* Make dynamic module entry point fully compatible to script main
function (allow taking optional parameters and up to 2 arguments).
* Fix reading of function types within generic members.
* Add crashing tests to status files to avoid generation of
core dumps on the bots.
TEST=ci (vm-aot-dyn-linux-debug-x64)
Change-Id: Ibe8651ca13734101f2df2c8634f70ebf421dccef
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/382640
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
When reading function types from bytecode, number of implicit
parameters should be set in the FunctionType.
Capture variable holding a local function when local function
invocation happens from a different function scope.
Also remove debug prints from bytecode reader.
TEST=corelib/list_for_each_test
TEST=language/closure/closure6_test
Change-Id: I69c92ba2749509a24d13e8b2a10c5dea76973a56
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/381081
Auto-Submit: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>
Tess Strickland