The former contents of the VM isolate are now included into each isolate group. This makes each isolate group's heap independent, and in particular allows each heap to be allocated to a separate pointer cage (not done in this CL).
The duplicated stubs that allowed PC relative calls are removed, since the originals can now be the target of PC relative calls.
The bootstrapping needing to load an AppJIT or AppAOT snapshot is reduced to allocating the oddballs. The code is entirely dropped in the AOT runtime, but the JIT runtime still has it to allow for flags to affect the compilation of the stub code. Further refactoring might be able to remove this for the JIT runtime too, with only gen_snapshot knowing how to bootstrap.
Class serialization no longer distinguishes predefined classes.
The page containing null is marked as never-evacuate. null, false and true must not move because the compiler relies on their low bits having certain patterns for some optimizations. (Previously, the entire VM isolate heap never moved.)
Compaction is disabled for IA32. Due to register pressure, some stub calls must not use a scratch register and embed the address of Code.
The page containing the call-through-safepoint stub is frozen when running with --write-protect-code and the stub is created at runtime (instead of loaded from an AppJIT or AppAOT snapshot). This stub must remain executable even during a safepoint, as a foreign call might during return during a safepoint and only block after the stub directs it to the runtime.
The snapshot symbols are renamed to kDartSnapshotData and kDartSnapshotText. There is no need to distinguish the VM isolate's snapshot, and snaphots are per isolate group not per isolate. Aliases with the old names are added to ease migration.
Some global flags that were automatically set based on the VM isolate's snapshot are now isolate group flags and automatically set by the isolate group's snapshot.
TEST=ci
Change-Id: Iee82016057d609112e9b021d178fc3d4d18b5044
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/500621
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Tess Strickland <sstrickl@google.com>
SLSA-Policy-Verified: SLSA Policy Verification Service <devtools-gerritcodereview-exitgate@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Sometimes compiler omits type checks for the 'await' and 'return from
async' by relying on the fact that certain classes cannot hold
instances of Future.
In JIT mode, the property 'class-can-be-Future' may change when a new
class is loaded dynamically (e.g. through IsolateMirror.loadUri).
In such a case, the generated code assuming that certain class
cannot be Future should be correctly deoptimized.
This CL implements this deoptimization by adding such classes into
the list of CHA guarded classes.
TEST=runtime/tests/vm/dart/await_type_check_with_dynamic_loading_test.dart
Change-Id: Ib3a3768d073e8562b794186e72cb9d61e9f496fa
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/309822
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
* IsInternalOnlyId -> IsInternalOnlyClassId
* Removes constexpr predicate ClassComesBeforeOtherInternalOnlyClasses()
used in only two locations and inlines the returned condition.
* Change IsErrorClassId to check <= kUnwindErrorCid instead of
<= kLastInternalOnlyCid.
TEST=Refactoring, so existing tests.
Change-Id: Ib7dfc89aba16d52733de05687f0ca7055c16e7a3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/210126
Auto-Submit: Tess Strickland <sstrickl@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
* Adds IsInternalOnlyCid, which replaces the old `cid < kInstanceCid`
check.
* Adds kFirstInternalOnlyCid and kLastInternalOnlyCid, which should be
used in places that loop over the internal-only cids.
* Adds ObjectComesBeforeOtherInternalOnlyClasses(), which can be used
with COMPILE_ASSERT in places that assume kObjectCid immediately
precedes the other internal-only cids.
* Replaces assumption in IsErrorId() that Instance immediately follows
the internal-only cids with an assumption that the current last error
cid is the same as kLastInternalOnlyCid.
* Separates out CLASS_LIST_NO_OBJECT_NOR_STRING_... into two pieces to
make it clearer where to add new internal-only cids and where to add
new Instance cids:
* CLASS_LIST_INTERNAL_ONLY, which contains class ids for real
classes that are VM internal, except for Object.
* CLASS_LIST_INSTANCE_SINGLETONS, which contains class ids for
subclasses of Instance that are not part of a separately handled
group of cids.
TEST=Refactoring, so existing tests.
Change-Id: I9905d5928a592164d58de1f121b9ce669f2b3ce1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/210122
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@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>
#if defined(DART_PRECOMPILED_RUNTIME)
#error "AOT runtime should not use compiler sources (including header files)"
#endif // defined(DART_PRECOMPILED_RUNTIME)
Remove #if defined(DART_PRECOMPILED_RUNTIME) from most compiler sources.
Change-Id: Id175c83fdbea38d9d5e1371ff433e3888f2afe8a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/143523
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@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>
Ryan Macnak