mirror of
https://github.com/dart-lang/sdk
synced 2024-10-06 14:29:50 +00:00
3669086a40
In AOT we can have unboxed fields that will not be visited by GC
visitors and as such are also not reported as <obj>.references when
producing heap snapshots.
Though the heapsnapshot's <class>.fields will contain entries
for unboxed fields, which causes the fields index calculation to be
incorrect.
This can cause various confusing things, e.g. incorrectly caluclated
retaining paths, since the <class>.fields.index doesn't match the
index in <obj>.references.
To fix this this CL will change the visiting code to emit dummy
references for unboxed fields.
The written test uncovered a few other issues:
- report type_arguments and native_fields in <class>.fields
=> the visitors already visit those fields
- fix `Class::next_{host,target}_field_offset` for classes
with native fields
=> this will also shrink size of `NativeWrapperClass` subclasses
- ensure classes with vm-defined layout are finalized
=> we assume objects should only exist in heap if their class
is finalized
- fix `FfiNativeFunction` type_argument offset
- fixes for object fields list
=> add missing entries, fix existing entries
Fixes https://github.com/dart-lang/sdk/issues/49711
TEST=vm/dart{,_2}/heap_snapshot_regress_49711_test
Change-Id: I8e25680b2c0c8c49caafbb8da57b0b6419e89c4f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/255814
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
|
||
|---|---|---|
| .. | ||
| bin | ||
| docs | ||
| include | ||
| lib | ||
| observatory | ||
| observatory_2 | ||
| platform | ||
| tests | ||
| third_party | ||
| tools | ||
| vm | ||
| .clang-tidy | ||
| .gitignore | ||
| BUILD.gn | ||
| codereview.settings | ||
| configs.gni | ||
| CPPLINT.cfg | ||
| OWNERS | ||
| PRESUBMIT.py | ||
| runtime_args.gni | ||