Alexander Aprelev
65d0d8581a
Having forwarding tables on the Thread allows for those tables to be used in dart mutator thread running in IsolateGroup-shared context. On 32-bit platforms(arm) the forwarding tables are used during [SendPort.send] message verification. Fixes https://github.com/dart-lang/sdk/issues/60817 TEST=isolate_group_shared_send_test Change-Id: I58b33c14026584330b594776e812fe1d48bc2fd5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/431942 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Alexander Aprelev <aam@google.com>
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_OBJECT_GRAPH_COPY_H_
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#define RUNTIME_VM_OBJECT_GRAPH_COPY_H_
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namespace dart {
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class Thread;
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class Object;
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class ObjectPtr;
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class Zone;
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// Whether the object can safely be shared across isolates due to it being
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// deeply immutable.
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bool CanShareObjectAcrossIsolates(ObjectPtr obj);
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// Makes a transitive copy of the object graph referenced by [object]. Will not
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// copy objects that can be safely shared - due to being immutable.
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//
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// The result will be an array of length 3 of the format
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//
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// [
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// <message>,
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// <collection-lib-objects-to-rehash>,
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// <core-lib-objects-to-rehash>,
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// ]
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//
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// If the array of objects to rehash is not `null` the receiver should re-hash
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// those objects.
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ObjectPtr CopyMutableObjectGraph(const Object& root);
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typedef enum {
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kInternalToIsolateGroup,
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kExternalBetweenIsolateGroups,
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} TraversalRules;
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// Returns a string representation of a retaining path from `from` to `to`,
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// blank string if `to` is not reachable from `from`.
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// Traversal doesn't follow all the object graph links, only those
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// that makes sense isolate message passing.
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const char* FindRetainingPath(Zone* zone,
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Thread* thread,
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const Object& from,
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const Object& to,
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TraversalRules traversal_rules);
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} // namespace dart
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#endif // RUNTIME_VM_OBJECT_GRAPH_COPY_H_
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