Root cause is that `Function::Hash()` depends on the owner class
id. This causes two issues
a) Issue with reload:
During reload the reloader code will change `Function::owner()`
from a `Class` to a `PatchClass`. This in return will cause a change in
the function's hash, which means we won't find the function in the
closure cache anymore.
b) Issue with app-jit:
As part of app-jit we re-number class ids. This re-numbering would also
render the closure cache as invalid - as the function hash code would
change. So instead the closure cache was cleared entirely. While this
works for AOT, in app-jit we may serialize closure functions and their
code. Though at app-jit runtime we then fail to find the functions in
the closure function cache (as it was cleared during snapshoting)
(This will surface by us triggering an optimizing compile of a function
in the background compiler which will try to make a new `Function`
object for a closure, even though the app-jit snapshot already has one)
To fix these issues we make the `Function::Hash()` stable across reload
* we use `Function::Owner()` instead of `Function::owner()` (the
former will always return the actual class, the ladder can return
the `PatchClass`)
* we avoid re-hashing the closure cache by making `Function::Hash()`
use the name of the class instead of the class id
* we clear out the closure cache array during AOT snapshoting, as this
is not used in AOT runtime.
Closes https://github.com/dart-lang/sdk/issues/52803
TEST=Fixes various issues on CI.
Change-Id: I352d0a768df0f29d504cdd80e3533cbedc437b9b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/311744
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
Hashes of functions depend on the class ids, so cache of the closure
functions should be cleared when class ids are sorted.
This is safe to do because at that point all compiled code is cleared.
TEST=ci
Change-Id: Iaf3a66d1026611fc0a3df3903cb4e09e6d6c4c17
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/311723
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Auto-Submit: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Previously, inliner was able to inline closure calls only when closure
was allocated in the current function (or in a function which was
inlined so far). This is not true for local functions declared in outer
functions (they are allocated at declaration site).
Now, when calling local functions, target of closure call is always
known regardless of where the function is declared, so calls to local
functions can be inlined.
TEST=runtime/tests/vm/dart/inline_local_functions_il_test.dart
Fixes https://github.com/dart-lang/sdk/issues/52695
Fixes https://github.com/dart-lang/sdk/issues/15558
Change-Id: I0e51dbaf63a6d4427bff366b40414ca5fac3d418
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/311465
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
We should not need to retain functions which do not have any code,
the only reason to retain them would be for runtime to be able to
find the implicit closure (when performing lookup through API).
Additionally drop closure_functions array when producing
PRODUCT snapshot - because this array is not going to be used.
TEST=ci
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-product-x64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-dwarf-linux-product-x64-try
Change-Id: I29110ce613fdb347e2627d857f790e82602926d3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/219481
Commit-Queue: Slava Egorov <vegorov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Attempts to acquire safepoint lock while in SafepointOperationScope could result
in deadlocks if somebody else was holding that lock when they were forced to a safepoint.
Clean up few places where locks were acquired in SafepointOperationScope.
Introduce StoppedMutatorsScope and GroupDebugger::RunUnderReadLockIfNeeded that acquires
a lock only if it runs outside of StoppedMutatorsScope - to prevent such deadlocks.
Also fix tsan warning about data race around message_notify_callback by making it atomic.
TEST=tsan runs of debugger CI tests
Fixes https://github.com/dart-lang/sdk/issues/45527
Fixes https://github.com/dart-lang/sdk/issues/45549
Issue https://github.com/dart-lang/sdk/issues/36097
Change-Id: Ibb53d9ce760d869e044e17075aeebf20fc0016a5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/193582
Commit-Queue: Alexander Aprelev <aam@google.com>
Reviewed-by: Ben Konyi <bkonyi@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` (or to another place).
The access of `ObjectStore::closure_functions()` was spread out over our
codebase, including from `Isolate`. This CL moves it to a centralized
place - ClosureFunctionsCache.
Issue https://github.com/dart-lang/sdk/issues/36097
TEST=Pure refactoring - relying on existing test coverage.
Change-Id: I3b282623f07614cdc2c2a863bd5b9d6c7748d36f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177130
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Alexander Markov