| commit | ab6aeaa106ecdc8c8a8793aaaa3e6dce38456d5a | [log] [tgz] |
|---|---|---|
| author | Martin Kustermann <kustermann@google.com> | Wed May 22 01:23:46 2019 +0000 |
| committer | commit-bot@chromium.org <commit-bot@chromium.org> | Wed May 22 01:23:46 2019 +0000 |
| tree | 9c4d342a3aa847830c9b676307602ac3e2c49338 | |
| parent | 2bbb2f3c1fddded8092c1c8c049c472737faf12a [diff] |
[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>
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