dmcallis
65a0592776
Source code drop for the Actionscript virtual machine in the Adobe Flash Player for December 2013
107 lines
4.2 KiB
C++
107 lines
4.2 KiB
C++
/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
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/* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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namespace avmplus
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{
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/**
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* type descriptor for a captured scope chain
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*
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* Note: ScopeTypeChain is now immutable; once created it cannot be modified
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*/
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class GC_CPP_EXACT(ScopeTypeChain, MMgc::GCTraceableObject)
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{
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private:
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ScopeTypeChain(int32_t _size, int32_t _fullsize, Traits* traits);
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static const ScopeTypeChain* create(MMgc::GC* gc, Traits* traits, const ScopeTypeChain* outer, const FrameValue* values, int32_t nValues, Traits* append, Traits* extra);
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public:
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static const ScopeTypeChain* create(MMgc::GC* gc, Traits* traits, const ScopeTypeChain* outer, const FrameState* state, Traits* append, Traits* extra);
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#ifdef VMCFG_AOT
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static const ScopeTypeChain* create(MMgc::GC* gc, Traits* traits, const ScopeTypeChain* outer, Traits* const* stateTraits, uint32_t nStateTraits, uint32_t nStateWithTraits, Traits* append, Traits* extra);
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#endif
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static const ScopeTypeChain* createEmpty(MMgc::GC* gc, Traits* traits);
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static const ScopeTypeChain* createExplicit(MMgc::GC* gc, Traits* traits, Traits** types);
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const ScopeTypeChain* cloneWithNewTraits(MMgc::GC* gc, Traits* traits) const;
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Traits* traits() const;
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Traits* getScopeTraitsAt(uint32_t i) const;
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bool getScopeIsWithAt(uint32_t i) const;
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PrintWriter& print(PrintWriter& prw) const;
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bool equals(const ScopeTypeChain* that) const;
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private:
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void setScopeAt(uint32_t i, Traits* t, bool w = false);
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// Traits are MMgc-allocated, thus always 8-byte-aligned, so the low 3 bits are available for us to use
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static const uintptr_t ISWITH = 0x01;
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// ------------------------ DATA SECTION BEGIN
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GC_DATA_BEGIN(ScopeTypeChain)
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public:
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const int32_t size;
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const int32_t fullsize;
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private:
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Traits* const GC_POINTER(_traits);
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uintptr_t GC_POINTERS_SMALL(_scopes[1], fullsize); // Tagged pointers to Traits objects.
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GC_DATA_END(ScopeTypeChain)
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// ------------------------ DATA SECTION END
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};
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/**
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* a captured scope chain
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*/
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class GC_CPP_EXACT(ScopeChain, MMgc::GCTraceableObject)
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{
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#ifdef VMCFG_NANOJIT
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friend class CodegenLIR;
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friend class MopsRangeCheckFilter;
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friend class halfmoon::JitFriend;
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#endif
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private:
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ScopeChain(VTable* vtable, AbcEnv* abcEnv, const ScopeTypeChain* scopeTraits, Namespacep dxns);
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public:
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/*
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dxns is modelled as a variable on an activation object. The activation
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object will be in several scope chains, so we can't store dxns in the SC.
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When it changes, it's new valuable is visible in all closures in scope.
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*/
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static ScopeChain* create(MMgc::GC* gc, VTable* vtable, AbcEnv* abcEnv, const ScopeTypeChain* scopeTraits, const ScopeChain* outer, Namespacep dxns);
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ScopeChain* cloneWithNewVTable(MMgc::GC* gc, VTable* vtable, AbcEnv* abcEnv, const ScopeTypeChain* scopeTraits = NULL);
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VTable* vtable() const;
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AbcEnv* abcEnv() const;
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const ScopeTypeChain* scopeTraits() const;
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int32_t getSize() const;
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Atom getScope(int32_t i) const;
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void setScope(MMgc::GC* gc, int32_t i, Atom value);
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Namespacep getDefaultNamespace() const;
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PrintWriter& print(PrintWriter& prw) const;
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// ------------------------ DATA SECTION BEGIN
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GC_DATA_BEGIN(ScopeChain)
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private:
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VTable* const GC_POINTER(_vtable);
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AbcEnv* const GC_POINTER(_abcEnv);
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const ScopeTypeChain* const GC_POINTER(_scopeTraits);
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GCMember<Namespace> const GC_POINTER(_defaultXmlNamespace);
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Atom GC_ATOMS_SMALL(_scopes[1], "getSize()");
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GC_DATA_END(ScopeChain)
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// ------------------------ DATA SECTION END
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};
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}
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