Daniel Andersson
51de0c8ff4
Prepares for parallel marking by encapsulating the skipped code functions set, and moving the finalization out to the GCMarker, after all marking is done. Also changes the interface in the visitor interface to make it less coupled with the representation of the set. BUG= R=iposva@google.com Review URL: https://codereview.chromium.org//1287463003 .
92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
// Copyright (c) 2011, 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 VM_VISITOR_H_
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#define VM_VISITOR_H_
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#include "vm/allocation.h"
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#include "vm/globals.h"
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#include "vm/growable_array.h"
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namespace dart {
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// Forward declarations.
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class Isolate;
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class RawObject;
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// An object pointer visitor interface.
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class ObjectPointerVisitor {
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public:
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explicit ObjectPointerVisitor(Isolate* isolate) : isolate_(isolate) {}
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virtual ~ObjectPointerVisitor() {}
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Isolate* isolate() const { return isolate_; }
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// Range of pointers to visit 'first' <= pointer <= 'last'.
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virtual void VisitPointers(RawObject** first, RawObject** last) = 0;
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virtual bool visit_function_code() const { return true; }
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virtual void add_skipped_code_function(RawFunction* funct) {
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UNREACHABLE();
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}
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// len argument is the number of pointers to visit starting from 'p'.
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void VisitPointers(RawObject** p, intptr_t len) {
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VisitPointers(p, (p + len - 1));
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}
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void VisitPointer(RawObject** p) { VisitPointers(p , p); }
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private:
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Isolate* isolate_;
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NoSafepointScope no_safepoints_;
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DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectPointerVisitor);
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};
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// An object visitor interface.
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class ObjectVisitor {
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public:
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explicit ObjectVisitor(Isolate* isolate) : isolate_(isolate) {}
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virtual ~ObjectVisitor() {}
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Isolate* isolate() const { return isolate_; }
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// Invoked for each object.
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virtual void VisitObject(RawObject* obj) = 0;
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private:
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Isolate* isolate_;
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DISALLOW_COPY_AND_ASSIGN(ObjectVisitor);
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};
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// An object finder visitor interface.
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class FindObjectVisitor {
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public:
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explicit FindObjectVisitor(Isolate* isolate) : isolate_(isolate) {}
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virtual ~FindObjectVisitor() {}
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// Allow to specify a address filter.
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virtual uword filter_addr() const { return 0; }
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bool VisitRange(uword begin_addr, uword end_addr) const {
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uword addr = filter_addr();
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return (addr == 0) || ((begin_addr <= addr) && (addr < end_addr));
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}
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// Check if object matches find condition.
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virtual bool FindObject(RawObject* obj) const = 0;
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private:
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Isolate* isolate_;
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DISALLOW_IMPLICIT_CONSTRUCTORS(FindObjectVisitor);
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};
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} // namespace dart
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#endif // VM_VISITOR_H_
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