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asprogram.d
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asprogram.d
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/*
* Copyright 2010, 2011, 2012 Vladimir Panteleev <vladimir@thecybershadow.net>
* This file is part of RABCDAsm.
*
* RABCDAsm is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* RABCDAsm is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with RABCDAsm. If not, see <http://www.gnu.org/licenses/>.
*/
module asprogram;
import std.algorithm;
import core.stdc.string;
import abcfile;
import autodata;
/**
* Represents a hierarchically-organized ActionScript program,
* with all constants expanded and bytecode disassembled to separate instructions.
*/
final class ASProgram
{
ushort minorVersion, majorVersion;
Script[] scripts;
Class[] orphanClasses;
Method[] orphanMethods;
static class Namespace
{
ASType kind;
string name;
uint privateIndex; // unique index for private namespaces
mixin AutoCompare;
mixin AutoToString;
mixin ProcessAllData;
}
static class Multiname
{
ASType kind;
union
{
struct _QName
{
Namespace ns;
string name;
} _QName vQName;
struct _RTQName
{
string name;
} _RTQName vRTQName;
struct _RTQNameL
{
} _RTQNameL vRTQNameL;
struct _Multiname
{
string name;
Namespace[] nsSet;
} _Multiname vMultiname;
struct _MultinameL
{
Namespace[] nsSet;
} _MultinameL vMultinameL;
struct _TypeName
{
Multiname name;
Multiname[] params;
} _TypeName vTypeName;
}
mixin AutoCompare;
mixin AutoToString;
R processData(R, string prolog, string epilog, H)(ref H handler) const pure nothrow
{
mixin(prolog);
mixin(addAutoField("kind"));
switch (kind)
{
case ASType.QName:
case ASType.QNameA:
mixin(addAutoField("vQName.ns"));
mixin(addAutoField("vQName.name"));
break;
case ASType.RTQName:
case ASType.RTQNameA:
mixin(addAutoField("vRTQName.name"));
break;
case ASType.RTQNameL:
case ASType.RTQNameLA:
break;
case ASType.Multiname:
case ASType.MultinameA:
mixin(addAutoField("vMultiname.name"));
mixin(addAutoField("vMultiname.nsSet"));
break;
case ASType.MultinameL:
case ASType.MultinameLA:
mixin(addAutoField("vMultinameL.nsSet"));
break;
case ASType.TypeName:
mixin(addAutoField("vTypeName.name"));
mixin(addAutoField("vTypeName.params"));
break;
default:
assert(false, "Unknown Multiname kind");
}
mixin(epilog);
}
private Multiname[] toQNames()
{
switch (kind)
{
case ASType.QName:
case ASType.QNameA:
return [this];
case ASType.Multiname:
case ASType.MultinameA:
Multiname[] result;
foreach (ns; vMultiname.nsSet)
{
auto n = new Multiname;
n.kind = kind==ASType.Multiname ? ASType.QName : ASType.QNameA;
n.vQName.ns = ns;
n.vQName.name = vMultiname.name;
result ~= n;
}
return result;
default:
throw new .Exception("Can't expand Multiname of this kind");
}
}
}
static class Method
{
Multiname[] paramTypes;
Multiname returnType;
string name;
ubyte flags; // MethodFlags bitmask
Value[] options;
string[] paramNames;
MethodBody vbody;
}
static class Metadata
{
string name;
string[] keys, values;
mixin AutoCompare;
mixin ProcessAllData;
}
static class Instance
{
Multiname name;
Multiname superName;
ubyte flags; // InstanceFlags bitmask
Namespace protectedNs;
Multiname[] interfaces;
Method iinit;
Trait[] traits;
}
struct Value
{
ASType vkind;
union
{
long vint; // Integer
ulong vuint; // UInteger
double vdouble; // Double
string vstring; // String
Namespace vnamespace; // Namespace, PackageNamespace, PackageInternalNs, ProtectedNamespace, ExplicitNamespace, StaticProtectedNs, PrivateNamespace
}
}
struct Trait
{
Multiname name;
TraitKind kind;
ubyte attr; // TraitAttributes bitmask
union
{
struct _Slot
{
uint slotId;
Multiname typeName;
Value value;
} _Slot vSlot;
struct _Class
{
uint slotId;
Class vclass;
} _Class vClass;
struct _Function
{
uint slotId;
Method vfunction;
} _Function vFunction;
struct _Method
{
uint dispId;
Method vmethod;
} _Method vMethod;
}
Metadata[] metadata;
}
static class Class
{
Method cinit;
Trait[] traits;
Instance instance;
override string toString()
{
return instance.name.toString();
}
}
static class Script
{
Method sinit;
Trait[] traits;
}
static class MethodBody
{
Method method;
uint maxStack;
uint localCount;
uint initScopeDepth;
uint maxScopeDepth;
Instruction[] instructions;
Exception[] exceptions;
Trait[] traits;
string error;
ubyte[] rawBytes;
}
struct Instruction
{
Opcode opcode;
union Argument
{
ubyte ubytev;
long intv;
ulong uintv;
// int/uint constants are in intv/uintv
double doublev;
string stringv;
Namespace namespacev;
Multiname multinamev;
Class classv;
Method methodv;
ABCFile.Label jumpTarget;
ABCFile.Label[] switchTargets;
}
Argument[] arguments;
}
struct Exception
{
ABCFile.Label from, to, target;
Multiname excType;
Multiname varName;
}
this()
{
majorVersion = 46;
minorVersion = 16;
}
static ASProgram fromABC(ABCFile abc)
{
return (new ABCtoAS(abc)).as;
}
ABCFile toABC()
{
return (new AStoABC(this)).abc;
}
}
private final class ABCtoAS
{
ASProgram as;
ABCFile abc;
ASProgram.Namespace[] namespaces;
ASProgram.Namespace[][] namespaceSets;
ASProgram.Multiname[] multinames;
ASProgram.Method[] methods;
ASProgram.Metadata[] metadata;
ASProgram.Instance[] instances;
ASProgram.Class[] classes;
bool[] methodAdded;
bool[] classAdded;
ASProgram.Method getMethod(uint index)
{
methodAdded[index] = true;
return methods[index];
}
ASProgram.Class getClass(uint index)
{
classAdded[index] = true;
return classes[index];
}
ASProgram.Value convertValue(ASType kind, uint val)
{
ASProgram.Value o;
o.vkind = kind;
switch (o.vkind)
{
case ASType.Integer:
o.vint = abc.ints[val]; // WARNING: discarding extra bits
break;
case ASType.UInteger:
o.vuint = abc.uints[val]; // WARNING: discarding extra bits
break;
case ASType.Double:
o.vdouble = abc.doubles[val];
break;
case ASType.Utf8:
o.vstring = abc.strings[val];
break;
case ASType.Namespace:
case ASType.PackageNamespace:
case ASType.PackageInternalNs:
case ASType.ProtectedNamespace:
case ASType.ExplicitNamespace:
case ASType.StaticProtectedNs:
case ASType.PrivateNamespace:
o.vnamespace = namespaces[val];
break;
case ASType.True:
case ASType.False:
case ASType.Null:
case ASType.Undefined:
break;
default:
throw new Exception("Unknown type");
}
return o;
}
ASProgram.Namespace convertNamespace(ref ABCFile.Namespace namespace, int privateIndex)
{
auto n = new ASProgram.Namespace();
n.kind = namespace.kind;
n.name = abc.strings[namespace.name];
n.privateIndex = privateIndex;
return n;
}
ASProgram.Namespace[] convertNamespaceSet(uint[] namespaceSet)
{
if (namespaceSet is null)
return null;
auto n = new ASProgram.Namespace[namespaceSet.length];
foreach (j, namespace; namespaceSet)
n[j] = namespaces[namespace];
if (namespaceSet.length == 0)
{
n.length = 1;
n.length = 0;
assert (n !is null); // empty, but not null
}
return n;
}
ASProgram.Multiname convertMultiname(ref ABCFile.Multiname multiname)
{
auto n = new ASProgram.Multiname();
n.kind = multiname.kind;
switch (multiname.kind)
{
case ASType.QName:
case ASType.QNameA:
n.vQName.ns = namespaces[multiname.QName.ns];
n.vQName.name = abc.strings[multiname.QName.name];
break;
case ASType.RTQName:
case ASType.RTQNameA:
n.vRTQName.name = abc.strings[multiname.RTQName.name];
break;
case ASType.RTQNameL:
case ASType.RTQNameLA:
break;
case ASType.Multiname:
case ASType.MultinameA:
n.vMultiname.name = abc.strings[multiname.Multiname.name];
n.vMultiname.nsSet = namespaceSets[multiname.Multiname.nsSet];
break;
case ASType.MultinameL:
case ASType.MultinameLA:
n.vMultinameL.nsSet = namespaceSets[multiname.MultinameL.nsSet];
break;
case ASType.TypeName:
// handled in postConvertMultiname
break;
default:
throw new Exception("Unknown Multiname kind");
}
return n;
}
void postConvertMultiname(ref ABCFile.Multiname multiname, ASProgram.Multiname n)
{
switch (multiname.kind)
{
case ASType.TypeName:
n.vTypeName.name = multinames[multiname.TypeName.name];
n.vTypeName.params.length = multiname.TypeName.params.length;
foreach (j, param; multiname.TypeName.params)
n.vTypeName.params[j] = multinames[param];
break;
default:
break;
}
}
ASProgram.Method convertMethod(ref ABCFile.MethodInfo method)
{
auto n = new ASProgram.Method();
n.paramTypes.length = method.paramTypes.length;
foreach (j, param; method.paramTypes)
n.paramTypes[j] = multinames[param];
n.returnType = multinames[method.returnType];
n.name = abc.strings[method.name];
n.flags = method.flags;
n.options.length = method.options.length;
foreach (j, ref option; method.options)
n.options[j] = convertValue(option.kind, option.val);
n.paramNames.length = method.paramNames.length;
foreach (j, name; method.paramNames)
n.paramNames[j] = abc.strings[name];
return n;
}
ASProgram.Metadata convertMetadata(ref ABCFile.Metadata md)
{
auto n = new ASProgram.Metadata();
n.name = abc.strings[md.name];
n.keys.length = md.keys.length;
foreach (j, key; md.keys)
n.keys[j] = abc.strings[key];
n.values.length = md.values.length;
foreach (j, value; md.values)
n.values[j] = abc.strings[value];
return n;
}
ASProgram.Trait[] convertTraits(ABCFile.TraitsInfo[] traits)
{
auto r = new ASProgram.Trait[traits.length];
foreach (i, ref trait; traits)
{
r[i].name = multinames[trait.name];
r[i].kind = trait.kind;
r[i].attr = trait.attr;
switch (trait.kind)
{
case TraitKind.Slot:
case TraitKind.Const:
r[i].vSlot.slotId = trait.Slot.slotId;
r[i].vSlot.typeName = multinames[trait.Slot.typeName];
r[i].vSlot.value = convertValue(trait.Slot.vkind, trait.Slot.vindex);
break;
case TraitKind.Class:
r[i].vClass.slotId = trait.Class.slotId;
if (classes.length==0 || classes[trait.Class.classi] is null)
throw new Exception("Forward class reference");
r[i].vClass.vclass = getClass(trait.Class.classi);
break;
case TraitKind.Function:
r[i].vFunction.slotId = trait.Function.slotId;
r[i].vFunction.vfunction = getMethod(trait.Function.functioni);
break;
case TraitKind.Method:
case TraitKind.Getter:
case TraitKind.Setter:
r[i].vMethod.dispId = trait.Method.dispId;
r[i].vMethod.vmethod = getMethod(trait.Method.method);
break;
default:
throw new Exception("Unknown trait kind");
}
r[i].metadata.length = trait.metadata.length;
foreach (j, index; trait.metadata)
r[i].metadata[j] = metadata[index];
}
return r;
}
ASProgram.Instance convertInstance(ref ABCFile.Instance instance)
{
auto n = new ASProgram.Instance();
n.name = multinames[instance.name];
n.superName = multinames[instance.superName];
n.flags = instance.flags;
n.protectedNs = namespaces[instance.protectedNs];
n.interfaces.length = instance.interfaces.length;
foreach (j, intf; instance.interfaces)
n.interfaces[j] = multinames[intf];
n.iinit = getMethod(instance.iinit);
n.traits = convertTraits(instance.traits);
return n;
}
ASProgram.Class convertClass(ref ABCFile.Class vclass, uint i)
{
auto n = new ASProgram.Class();
n.cinit = getMethod(vclass.cinit);
n.traits = convertTraits(vclass.traits);
n.instance = instances[i];
return n;
}
ASProgram.Script convertScript(ref ABCFile.Script script)
{
auto n = new ASProgram.Script;
n.sinit = getMethod(script.sinit);
n.traits = convertTraits(script.traits);
return n;
}
ASProgram.MethodBody convertBody(ref ABCFile.MethodBody vbody)
{
auto n = new ASProgram.MethodBody;
n.method = methods[vbody.method];
n.maxStack = vbody.maxStack;
n.localCount = vbody.localCount;
n.initScopeDepth = vbody.initScopeDepth;
n.maxScopeDepth = vbody.maxScopeDepth;
n.instructions.length = vbody.instructions.length;
foreach (ii, ref instruction; vbody.instructions)
n.instructions[ii] = convertInstruction(instruction);
n.exceptions.length = vbody.exceptions.length;
foreach (j, ref exc; vbody.exceptions)
{
auto e = &n.exceptions[j];
e.from = exc.from;
e.to = exc.to;
e.target = exc.target;
e.excType = multinames[exc.excType];
e.varName = multinames[exc.varName];
}
n.traits = convertTraits(vbody.traits);
n.error = vbody.error;
n.rawBytes = vbody.rawBytes;
return n;
}
ASProgram.Instruction convertInstruction(ref ABCFile.Instruction instruction)
{
ASProgram.Instruction r;
r.opcode = instruction.opcode;
r.arguments.length = instruction.arguments.length;
foreach (i, type; opcodeInfo[instruction.opcode].argumentTypes)
final switch (type)
{
case OpcodeArgumentType.Unknown:
throw new Exception("Don't know how to convert OP_" ~ opcodeInfo[instruction.opcode].name);
case OpcodeArgumentType.UByteLiteral:
r.arguments[i].ubytev = instruction.arguments[i].ubytev;
break;
case OpcodeArgumentType.IntLiteral:
r.arguments[i].intv = instruction.arguments[i].intv;
break;
case OpcodeArgumentType.UIntLiteral:
r.arguments[i].uintv = instruction.arguments[i].uintv;
break;
case OpcodeArgumentType.Int:
r.arguments[i].intv = abc.ints[instruction.arguments[i].index];
break;
case OpcodeArgumentType.UInt:
r.arguments[i].uintv = abc.uints[instruction.arguments[i].index];
break;
case OpcodeArgumentType.Double:
r.arguments[i].doublev = abc.doubles[instruction.arguments[i].index];
break;
case OpcodeArgumentType.String:
r.arguments[i].stringv = abc.strings[instruction.arguments[i].index];
break;
case OpcodeArgumentType.Namespace:
r.arguments[i].namespacev = namespaces.checkedGet(instruction.arguments[i].index);
break;
case OpcodeArgumentType.Multiname:
r.arguments[i].multinamev = multinames.checkedGet(instruction.arguments[i].index);
break;
case OpcodeArgumentType.Class:
r.arguments[i].classv = classes.checkedGet(instruction.arguments[i].index);
break;
case OpcodeArgumentType.Method:
r.arguments[i].methodv = methods.checkedGet(instruction.arguments[i].index);
break;
case OpcodeArgumentType.JumpTarget:
case OpcodeArgumentType.SwitchDefaultTarget:
r.arguments[i].jumpTarget = instruction.arguments[i].jumpTarget;
break;
case OpcodeArgumentType.SwitchTargets:
r.arguments[i].switchTargets = instruction.arguments[i].switchTargets;
break;
}
return r;
}
this(ABCFile abc)
{
this.as = new ASProgram();
this.abc = abc;
as.minorVersion = abc.minorVersion;
as.majorVersion = abc.majorVersion;
namespaces.length = abc.namespaces.length;
foreach (uint i, ref namespace; abc.namespaces)
if (i)
namespaces[i] = convertNamespace(namespace, i);
namespaceSets.length = abc.namespaceSets.length;
foreach (i, namespaceSet; abc.namespaceSets)
if (i)
namespaceSets[i] = convertNamespaceSet(namespaceSet);
multinames.length = abc.multinames.length;
foreach (i, ref multiname; abc.multinames)
if (i)
multinames[i] = convertMultiname(multiname);
foreach (i, ref multiname; abc.multinames)
if (i)
postConvertMultiname(multiname, multinames[i]);
methods.length = methodAdded.length = abc.methods.length;
foreach (i, ref method; abc.methods)
methods[i] = convertMethod(method);
metadata.length = abc.metadata.length;
foreach (i, ref md; abc.metadata)
metadata[i] = convertMetadata(md);
instances.length = classAdded.length = abc.instances.length;
foreach (i, ref instance; abc.instances)
instances[i] = convertInstance(instance);
classes.length = abc.classes.length;
foreach (uint i, ref vclass; abc.classes)
classes[i] = convertClass(vclass, i);
as.scripts.length = abc.scripts.length;
foreach (i, ref script; abc.scripts)
as.scripts[i] = convertScript(script);
foreach (i, ref vbody; abc.bodies)
methods[vbody.method].vbody = convertBody(vbody);
foreach (i, b; classAdded)
if (!b)
as.orphanClasses ~= classes[i];
foreach (i, b; methodAdded)
if (!b)
as.orphanMethods ~= methods[i];
}
}
private final class AStoABC : ASVisitor
{
ABCFile abc;
static bool isNull(T)(T value)
{
//static if (is (T == class) || is(T == string))
//static if (is (T == class) || is(T U : U[]))
static if (is(typeof(value is null)))
return value is null;
else
static if (is (T == long))
return value == ABCFile.NULL_INT;
else
static if (is (T == ulong))
return value == ABCFile.NULL_UINT;
else
static if (is (T == double))
return value == ABCFile.NULL_DOUBLE;
else
return value == T.init;
}
static void move(T)(T[] array, size_t from, size_t to)
{
assert(from<array.length && to<array.length);
if (from == to)
return;
T t = array[from];
if (from < to)
memmove(array.ptr+from, array.ptr+from+1, (to-from)*T.sizeof);
else
memmove(array.ptr+to+1, array.ptr+to, (from-to)*T.sizeof);
array[to] = t;
}
/// Maintain an unordered set of values; sort/index by usage count
struct ConstantPool(T, bool haveNull = true)
{
alias immutable(T) I;
struct Entry
{
uint hits;
T value;
uint index;
mixin AutoCompare;
R processData(R, string prolog, string epilog, H)(ref H handler) const
{
mixin(prolog);
mixin(addAutoField("hits", true));
mixin(addAutoField("value"));
mixin(epilog);
}
}
Entry[immutable(T)] pool;
T[] values;
bool add(T value) // return true if added
{
if (haveNull && isNull(value))
return false;
auto cp = cast(I)value in pool;
if (cp is null)
{
pool[cast(I)value] = Entry(1, value);
return true;
}
else
{
cp.hits++;
return false;
}
}
bool notAdded(T value)
{
auto ep = cast(I)value in pool;
if (ep)
ep.hits++;
return !((haveNull && isNull(value)) || ep);
}
void finalize()
{
auto all = pool.values;
all.sort;
enum { NullOffset = haveNull ? 1 : 0 }
values.length = all.length + NullOffset;
foreach (uint i, ref c; all)
{
pool[cast(I)c.value].index = i + NullOffset;
values[i + NullOffset] = c.value;
}
}
uint get(T value)
{
if (haveNull && isNull(value))
return 0;
return pool[cast(I)value].index;
}
}
/// Pair an index with class instances
struct ReferencePool(T : Object)
{
struct Entry
{
uint hits;
void* object;
uint addIndex, index;
void*[] parents;
mixin AutoToString;
mixin ProcessAllData;
}
Entry[void*] pool;
T[] objects;
bool add(T obj) // return true if added
{
if (obj is null)
return false;
auto p = cast(void*)obj;
auto rp = p in pool;
if (rp is null)
{
pool[p] = Entry(1, p, to!uint(pool.length));
return true;
}
else
{
rp.hits++;
return false;
}
}
bool notAdded(T obj)
{
auto ep = (cast(void*)obj) in pool;
if (ep)
ep.hits++;
return !(obj is null || ep);
}
void registerDependency(T from, T to)
{
auto pfrom = (cast(void*)from) in pool;
assert(pfrom, "Unknown dependency source");
auto vto = cast(void*)to;
auto pto = vto in pool;
assert(pto, "Unknown dependency target");
assert(!pfrom.parents.contains(vto), "Dependency already set");
pfrom.parents ~= vto;
}
T[] getPreliminaryObjects()
{
return cast(T[])pool.keys;
}
void finalize()
{
// create array
auto all = new Entry*[pool.length];
int i=0;
foreach (ref e; pool)
all[i++] = &e;
// sort
sort!q{a.hits > b.hits || (a.hits == b.hits && a.addIndex < b.addIndex)}(all);
// topographical sort
topSort:
// update indices
foreach (uint j, e; all)
e.index = j;
foreach (ref a; pool)
foreach (parent; a.parents)
{
auto pb = parent in pool;
assert(pb !is null, "Can't find referenced object");
if (pb.index > a.index)
{
move(all, pb.index, a.index);
goto topSort;
}
}
objects.length = i;
foreach (j, e; all)
objects[j] = cast(T)e.object;
}
uint get(T obj)
{
assert(obj !is null, "Trying to get index of null object");
return pool[cast(void*)obj].index;
}
}
ConstantPool!(long) ints;
ConstantPool!(ulong) uints;
ConstantPool!(double) doubles;
ConstantPool!(string) strings;
ConstantPool!(ASProgram.Namespace) namespaces;
ConstantPool!(ASProgram.Namespace[]) namespaceSets;
ConstantPool!(ASProgram.Multiname) multinames;
ConstantPool!(ASProgram.Metadata, false) metadatas;
ReferencePool!(ASProgram.Class) classes;
ReferencePool!(ASProgram.Method) methods;
override void visitInt(long v) { ints.add(v); }
override void visitUint(ulong v) { uints.add(v); }
override void visitDouble(double v) { doubles.add(v); }
override void visitString(string v) { strings.add(v); }
override void visitNamespace(ASProgram.Namespace ns)
{
if (namespaces.add(ns))
super.visitNamespace(ns);
}
override void visitNamespaceSet(ASProgram.Namespace[] nsSet)
{
if (namespaceSets.add(nsSet))
super.visitNamespaceSet(nsSet);
}
override void visitMultiname(ASProgram.Multiname multiname)
{
if (multinames.notAdded(multiname))
{
super.visitMultiname(multiname);
bool r = multinames.add(multiname);
assert(r, "Recursive multiname reference");
}
}
override void visitMetadata(ASProgram.Metadata metadata)
{
if (metadatas.add(metadata))
super.visitMetadata(metadata);
}
override void visitClass(ASProgram.Class vclass)
{
if (classes.add(vclass))
super.visitClass(vclass);
}
override void visitMethod(ASProgram.Method method)
{
if (methods.add(method))
super.visitMethod(method);
}
uint getValueIndex(ref ASProgram.Value value)
{
switch (value.vkind)
{
case ASType.Integer:
return ints.get(value.vint);
case ASType.UInteger:
return uints.get(value.vuint);
case ASType.Double:
return doubles.get(value.vdouble);
case ASType.Utf8:
return strings.get(value.vstring);
case ASType.Namespace:
case ASType.PackageNamespace:
case ASType.PackageInternalNs:
case ASType.ProtectedNamespace:
case ASType.ExplicitNamespace:
case ASType.StaticProtectedNs:
case ASType.PrivateNamespace:
return namespaces.get(value.vnamespace);
case ASType.True:
case ASType.False:
case ASType.Null:
case ASType.Undefined:
return value.vkind; // must be non-zero for True/False/Null
default:
throw new Exception("Unknown type");
}
}
void registerClassDependencies()
{
ASProgram.Class[ASProgram.Multiname] classByName;
ASProgram.Class[] classObjects = classes.getPreliminaryObjects();
foreach (c; classObjects)
{