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#include "stdafx.h"
#include "RawPtr.h"
#include "Compiler/Engine.h"
#include "Compiler/Variable.h"
#include "Number.h"
#include "Maybe.h"
#include "Core/Hash.h"
#include "Core/Variant.h"
namespace storm {
void rawPtrCopy(InlineParams p) {
p.allocRegs(0, 1);
*p.state->l << mov(ptrRel(p.regParam(0)), ptrRel(p.regParam(1)));
}
void rawPtrInit(InlineParams p) {
p.allocRegs(0);
*p.state->l << mov(ptrRel(p.regParam(0)), p.param(1));
}
void rawPtrInitEmpty(InlineParams p) {
p.allocRegs(0);
*p.state->l << mov(ptrRel(p.regParam(0)), ptrConst(Size()));
}
void rawPtrAssign(InlineParams p) {
using namespace code;
p.allocRegs(0);
code::Reg dest = p.regParam(0);
*p.state->l << mov(ptrRel(dest, Offset()), p.param(1));
if (p.result->needed()) {
if (p.result->type().ref) {
// Suggest params[0].
if (!p.result->suggest(p.state, p.originalParam(0)))
*p.state->l << mov(p.result->location(p.state), dest);
} else {
// Suggest params[1].
if (!p.result->suggest(p.state, p.param(1)))
*p.state->l << mov(p.result->location(p.state), dest);
}
}
}
void rawPtrEmpty(InlineParams p) {
using namespace code;
if (p.result->needed()) {
*p.state->l << cmp(p.param(0), ptrConst(0));
*p.state->l << setCond(p.result->location(p.state), ifEqual);
}
}
void rawPtrAny(InlineParams p) {
using namespace code;
if (p.result->needed()) {
*p.state->l << cmp(p.param(0), ptrConst(0));
*p.state->l << setCond(p.result->location(p.state), ifNotEqual);
}
}
void rawPtrGet(InlineParams p) {
using namespace code;
if (p.result->needed()) {
if (p.result->type().ref) {
*p.state->l << lea(p.result->location(p.state), p.param(0));
} else if (!p.result->suggest(p.state, p.param(0))) {
*p.state->l << mov(p.result->location(p.state), p.param(0));
}
}
}
Str *CODECALL rawPtrToS(EnginePtr e, RootObject *ptr) {
StrBuf *buf = new (e) StrBuf();
*buf << S("0x") << hex(ptr);
return buf->toS();
}
Type *CODECALL rawPtrType(RootObject *ptr) {
if (ptr)
return runtime::gcTypeOf(ptr)->type;
else
return null;
}
Bool CODECALL rawPtrIsValue(const void *ptr) {
if (!ptr)
return false;
const GcType *type = runtime::gcTypeOf(ptr);
if (type->kind == GcType::tArray || type->kind == GcType::tWeakArray)
return type->type != null;
else
return false;
}
template <class T>
T CODECALL rawPtrRead(const void *ptr, Nat offset) {
const GcType *t = runtime::gcTypeOf(ptr);
if (t->kind == GcType::tArray || t->kind == GcType::tWeakArray) {
offset += OFFSET_OF(GcArray<Byte>, v);
}
return *(T *)((byte *)ptr + offset);
}
Nat CODECALL rawPtrCount(const void *ptr) {
if (!ptr)
return 0;
const GcType *t = runtime::gcTypeOf(ptr);
if (t->kind == GcType::tArray) {
return Nat(((GcArray<byte> *)ptr)->count);
} else if (t->kind == GcType::tWeakArray) {
return Nat(((GcWeakArray<void *> *)ptr)->count());
} else {
return 1;
}
}
Nat CODECALL rawPtrFilled(const void *ptr) {
if (!ptr)
return 0;
const GcType *t = runtime::gcTypeOf(ptr);
if (t->kind == GcType::tArray) {
return Nat(((GcArray<byte> *)ptr)->filled);
} else if (t->kind == GcType::tWeakArray) {
return Nat(((GcWeakArray<void *> *)ptr)->splatted());
} else {
return 1;
}
}
Nat CODECALL rawPtrSize(const void *ptr) {
if (!ptr)
return 0;
const GcType *t = runtime::gcTypeOf(ptr);
return Nat(t->stride);
}
// To make the calling convention behave correctly.
struct DummyPtr : GcArray<byte> {
Variant CODECALL rawPtrVariant() {
// Note: this is to make sure the compiler does not remove the null check on "this". It
// is technically UB to have a null this-pointer, but in these circumstances it can
// occur so we need to check it here.
// We use atomic reads/writes to ensure that the compiler does not optimize the check
// away. We also have a test for this so that we get to know if this breaks in the future.
void *obj = this;
obj = atomicRead(obj);
if (!obj)
return Variant();
const GcType *t = runtime::gcTypeOf(obj);
if (t->kind == GcType::tArray) {
// We can't express arrays as variants.
if (count != 1 || filled != 1)
return Variant();
if (!t->type)
return Variant();
// Create a variant!
return Variant(v, t->type);
} else if (t->kind == GcType::tWeakArray) {
// We don't support weak arrays.
return Variant();
} else if (t->kind == GcType::tFixed || t->kind == GcType::tFixedObj || t->kind == GcType::tType) {
// A pointer to some object.
return Variant((RootObject *)obj);
} else {
return Variant();
}
}
};
Bool CODECALL rawPtrCopyVariant(void *to, Variant &variant) {
if (!to)
return false;
const GcType *t = runtime::gcTypeOf(to);
if (t->kind == GcType::tArray) {
GcArray<byte> *array = (GcArray<byte> *)to;
// We can't express arrays as variants.
if (array->count != 1 || !t->type)
return false;
if (!variant.has(t->type))
return false;
const Handle &handle = t->type->handle();
// If 'filled', then call the destructor.
if (array->filled)
handle.safeDestroy(array->v);
handle.safeCopy(array->v, variant.getValue());
array->filled = 1;
return true;
} else if (t->kind == GcType::tWeakArray) {
// We don't support weak arrays.
return false;
} else if (t->kind == GcType::tFixed || t->kind == GcType::tFixedObj || t->kind == GcType::tType) {
// A pointer to some object.
if (!t->type)
return false;
if (!variant.has(t->type))
return false;
Type::CopyCtorFn copyCtor = t->type->rawCopyConstructor();
if (!copyCtor)
return false;
(*copyCtor)(to, variant.getObject());
return true;
} else {
return false;
}
}
void *CODECALL rawPtrAllocArray(Type *type, Nat count) {
const GcType *t = type->handle().gcArrayType;
return runtime::allocArray(type->engine, t, count);
}
void *CODECALL rawPtrFromGlobal(GlobalVar *global) {
return global->rawDataPtr();
}
void CODECALL rawPtrWriteFilled(const void *ptr, Nat value) {
if (!ptr)
return;
const GcType *t = runtime::gcTypeOf(ptr);
if (t->kind == GcType::tArray) {
((GcArray<byte> *)ptr)->filled = value;
} else if (t->kind == GcType::tWeakArray) {
((GcWeakArray<void *> *)ptr)->splatted(value);
}
}
template <class T>
void CODECALL rawPtrWrite(const void *ptr, Nat offset, T value) {
const GcType *t = runtime::gcTypeOf(ptr);
if (t->kind == GcType::tArray || t->kind == GcType::tWeakArray) {
offset += OFFSET_OF(GcArray<Byte>, v);
}
*(T *)((byte *)ptr + offset) = value;
}
RawPtrType::RawPtrType(Engine &e) :
Type(new (e) Str(S("RawPtr")), new (e) Array<Value>(), typeValue | typeFinal, Size::sPtr) {}
Bool RawPtrType::loadAll() {
Engine &e = engine;
Value me(this, false);
Array<Value> *rr = new (this) Array<Value>(2, Value(this, true));
Array<Value> *rv = new (this) Array<Value>(2, Value(this, true));
rv->at(1) = Value(this, false);
Array<Value> *v = new (this) Array<Value>(1, Value(this, false));
Array<Value> *vv = new (this) Array<Value>(2, Value(this, false));
Value b(StormInfo<Bool>::type(e));
Value n(StormInfo<Nat>::type(e));
Value str(StormInfo<Str *>::type(e));
add(inlinedFunction(e, Value(), Type::CTOR, rr, fnPtr(e, &rawPtrCopy))->makePure());
add(inlinedFunction(e, Value(this, true), S("="), rv, fnPtr(e, &rawPtrAssign)));
add(inlinedFunction(e, b, S("=="), vv, fnPtr(e, &numCmp<code::ifEqual>))->makePure());
add(inlinedFunction(e, b, S("!="), vv, fnPtr(e, &numCmp<code::ifNotEqual>))->makePure());
add(nativeFunction(e, n, S("hash"), v, address(&ptrHash)));
add(nativeEngineFunction(e, str, S("toS"), v, address(&rawPtrToS)));
add(inlinedFunction(e, b, S("empty"), v, fnPtr(e, &rawPtrEmpty))->makePure());
add(inlinedFunction(e, b, S("any"), v, fnPtr(e, &rawPtrAny))->makePure());
// Access.
Array<Value> *vo = new (this) Array<Value>(2, Value(this, false));
vo->at(1) = Value(StormInfo<Nat>::type(e));
add(nativeFunction(e, Value(StormInfo<Bool>::type(e)), S("readBool"), vo, address(&rawPtrRead<Bool>)));
add(nativeFunction(e, Value(StormInfo<Byte>::type(e)), S("readByte"), vo, address(&rawPtrRead<Byte>)));
add(nativeFunction(e, Value(StormInfo<Int>::type(e)), S("readInt"), vo, address(&rawPtrRead<Int>)));
add(nativeFunction(e, Value(StormInfo<Nat>::type(e)), S("readNat"), vo, address(&rawPtrRead<Nat>)));
add(nativeFunction(e, Value(StormInfo<Long>::type(e)), S("readLong"), vo, address(&rawPtrRead<Long>)));
add(nativeFunction(e, Value(StormInfo<Word>::type(e)), S("readWord"), vo, address(&rawPtrRead<Word>)));
add(nativeFunction(e, Value(StormInfo<Float>::type(e)), S("readFloat"), vo, address(&rawPtrRead<Float>)));
add(nativeFunction(e, Value(StormInfo<Double>::type(e)), S("readDouble"), vo, address(&rawPtrRead<Double>)));
add(nativeFunction(e, me, S("readPtr"), vo, address(&rawPtrRead<void *>)));
add(nativeFunction(e, Value(StormInfo<Nat>::type(e)), S("readCount"), v, address(&rawPtrCount)));
add(nativeFunction(e, Value(StormInfo<Nat>::type(e)), S("readFilled"), v, address(&rawPtrFilled)));
add(nativeFunction(e, Value(StormInfo<Nat>::type(e)), S("readSize"), v, address(&rawPtrSize)));
Array<Value> *write = valList(e, 3, me, n, Value(StormInfo<Bool>::type(e)));
add(nativeFunction(e, Value(), S("writeBool"), write, address(&rawPtrWrite<Bool>)));
write = valList(e, 3, me, n, Value(StormInfo<Byte>::type(e)));
add(nativeFunction(e, Value(), S("writeByte"), write, address(&rawPtrWrite<Byte>)));
write = valList(e, 3, me, n, Value(StormInfo<Int>::type(e)));
add(nativeFunction(e, Value(), S("writeInt"), write, address(&rawPtrWrite<Int>)));
write = valList(e, 3, me, n, Value(StormInfo<Nat>::type(e)));
add(nativeFunction(e, Value(), S("writeNat"), write, address(&rawPtrWrite<Nat>)));
write = valList(e, 3, me, n, Value(StormInfo<Long>::type(e)));
add(nativeFunction(e, Value(), S("writeLong"), write, address(&rawPtrWrite<Long>)));
write = valList(e, 3, me, n, Value(StormInfo<Word>::type(e)));
add(nativeFunction(e, Value(), S("writeWord"), write, address(&rawPtrWrite<Word>)));
write = valList(e, 3, me, n, Value(StormInfo<Float>::type(e)));
add(nativeFunction(e, Value(), S("writeFloat"), write, address(&rawPtrWrite<Float>)));
write = valList(e, 3, me, n, Value(StormInfo<Double>::type(e)));
add(nativeFunction(e, Value(), S("writeDouble"), write, address(&rawPtrWrite<Double>)));
write = valList(e, 3, me, n, me);
add(nativeFunction(e, Value(), S("writePtr"), write, address(&rawPtrWrite<void *>)));
add(nativeFunction(e, Value(), S("writeFilled"), valList(e, 2, me, n), address(&rawPtrWriteFilled)));
// Create from pointers:
Value obj(StormInfo<Object>::type(e));
Array<Value> *noPar = valList(e, 1, me.asRef());
add(inlinedFunction(e, Value(), Type::CTOR, noPar, fnPtr(e, &rawPtrInitEmpty)));
Array<Value> *objPar = valList(e, 2, me.asRef(), obj);
add(inlinedFunction(e, Value(), Type::CTOR, objPar, fnPtr(e, &rawPtrInit)));
Value tobj(StormInfo<TObject>::type(e));
Array<Value> *tobjPar = valList(e, 2, me.asRef(), tobj);
add(inlinedFunction(e, Value(), Type::CTOR, tobjPar, fnPtr(e, &rawPtrInit)));
Value variant(StormInfo<Variant>::type(e));
Array<Value> *variantPar = valList(e, 2, me.asRef(), variant.asRef());
add(inlinedFunction(e, Value(), Type::CTOR, variantPar, fnPtr(e, &rawPtrCopy))); // Same as a copy of a RawPtr.
add(nativeFunction(e, b, S("copyVariant"), valList(e, 2, me, variant.asRef()), address(&rawPtrCopyVariant)));
// Inspect the data.
Value type(StormInfo<Type *>::type(e));
add(nativeFunction(e, wrapMaybe(type), S("type"), v, address(&rawPtrType)));
add(nativeFunction(e, Value(StormInfo<Bool>::type(e)), S("isValue"), v, address(&rawPtrIsValue)));
add(inlinedFunction(e, wrapMaybe(obj), S("asObject"), v, fnPtr(e, &rawPtrGet))->makePure());
add(inlinedFunction(e, wrapMaybe(tobj), S("asTObject"), v, fnPtr(e, &rawPtrGet))->makePure());
add(nativeFunction(e, variant, S("asVariant"), v, address(&DummyPtr::rawPtrVariant)));
// Allocate an array containing some type.
Array<Value> *typeNat = new (this) Array<Value>(2, StormInfo<Type *>::type(e));
typeNat->at(1) = n;
add(nativeFunction(e, me, S("allocArray"), typeNat, address(&rawPtrAllocArray))->make(fnStatic));
// Read from a global variable.
Array<Value> *globalVar = new (this) Array<Value>(1, StormInfo<GlobalVar *>::type(e));
add(nativeFunction(e, me, S("fromGlobal"), globalVar, address(&rawPtrFromGlobal))->make(fnStatic));
return Type::loadAll();
}
code::TypeDesc *RawPtrType::createTypeDesc() {
return engine.ptrDesc();
}
void RawPtrType::modifyHandle(Handle *handle) {
// We're basically a pointer, so use location based hashes!
handle->locationHash = true;
}
}
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