mirror of
https://github.com/ZDoom/qzdoom.git
synced 2024-11-11 07:11:54 +00:00
- implement flag variables with the VM's sbit and lbit instructions.
- synthesize PField entries from the flag list for AActor. This intentionally excludes the bounce flags for now. - allow deprecated flags that do not call the deprecated flag handler. - disallow constructs like (a = b) = c by not allowing an address request on an assignment operation. - restrict modify/assign on boolean variables to the bit operators. Everything else needs to promote the result to an integer to make sense so it should be disallowed.
This commit is contained in:
parent
808188ff18
commit
f810b98167
8 changed files with 166 additions and 64 deletions
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@ -2479,6 +2479,31 @@ PField::PField()
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{
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}
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PField::PField(FName name, PType *type, DWORD flags, size_t offset, int bitvalue)
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: PSymbol(name), Offset(unsigned(offset)), Type(type), Flags(flags)
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{
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BitValue = bitvalue;
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if (bitvalue > -1)
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{
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if (type->IsA(RUNTIME_CLASS(PInt)) && unsigned(bitvalue) < 8 * type->Size)
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{
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// map to the single bytes in the actual variable. The internal bit instructions operate on 8 bit values.
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#ifndef __BIG_ENDIAN__
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Offset += BitValue / 8;
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#else
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Offset += type->Size - 1 - BitValue / 8;
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#endif
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BitValue &= 7;
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Type = TypeBool;
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}
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else
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{
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// Just abort. Bit fields should only be defined internally.
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I_FatalError("Trying to create an invalid bit field element: %s", name.GetChars());
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}
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}
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}
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/* PPrototype *************************************************************/
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IMPLEMENT_CLASS(PPrototype)
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@ -572,13 +572,12 @@ class PField : public PSymbol
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DECLARE_CLASS(PField, PSymbol);
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HAS_OBJECT_POINTERS
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public:
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PField(FName name, PType *type) : PSymbol(name), Offset(0), Type(type), Flags(0) {}
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PField(FName name, PType *type, DWORD flags) : PSymbol(name), Offset(0), Type(type), Flags(flags) {}
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PField(FName name, PType *type, DWORD flags, size_t offset) : PSymbol(name), Offset(unsigned(offset)), Type(type), Flags(flags) {}
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PField(FName name, PType *type, DWORD flags = 0, size_t offset = 0, int bitvalue = -1);
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unsigned int Offset;
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PType *Type;
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DWORD Flags;
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int BitValue;
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protected:
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PField();
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};
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@ -1768,8 +1768,8 @@ ExpEmit FxPostIncrDecr::Emit(VMFunctionBuilder *build)
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//
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//==========================================================================
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FxAssign::FxAssign(FxExpression *base, FxExpression *right)
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: FxExpression(EFX_Assign, base->ScriptPosition), Base(base), Right(right)
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FxAssign::FxAssign(FxExpression *base, FxExpression *right, bool ismodify)
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: FxExpression(EFX_Assign, base->ScriptPosition), Base(base), Right(right), IsModifyAssign(ismodify), IsBitWrite(-1)
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{
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AddressRequested = false;
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AddressWritable = false;
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@ -1781,12 +1781,14 @@ FxAssign::~FxAssign()
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SAFE_DELETE(Right);
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}
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/* I don't think we should allow constructs like (a = b) = c;...
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bool FxAssign::RequestAddress(bool *writable)
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{
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AddressRequested = true;
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if (writable != nullptr) *writable = AddressWritable;
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return true;
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}
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*/
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FxExpression *FxAssign::Resolve(FCompileContext &ctx)
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{
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@ -1797,6 +1799,15 @@ FxExpression *FxAssign::Resolve(FCompileContext &ctx)
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SAFE_RESOLVE(Right, ctx);
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if (IsModifyAssign && Base->ValueType == TypeBool && Right->ValueType != TypeBool)
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{
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// If the modify operation resulted in a type promotion from bool to int, this must be blocked.
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// (this means, for bool, only &=, ^= and |= are allowed, although DECORATE is more lax.)
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ScriptPosition.Message(MSG_ERROR, "Invalid modify/assign operation with a boolean operand");
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delete this;
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return nullptr;
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}
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if (Base->IsNumeric() && Right->IsNumeric())
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{
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if (Right->ValueType != ValueType)
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@ -1865,6 +1876,16 @@ FxExpression *FxAssign::Resolve(FCompileContext &ctx)
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return nullptr;
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}
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// Special case: Assignment to a bitfield.
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if (Base->ExprType == EFX_StructMember || Base->ExprType == EFX_ClassMember)
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{
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auto f = static_cast<FxStructMember *>(Base)->membervar;
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if (f->BitValue != -1 && !(f->Flags & VARF_ReadOnly))
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{
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IsBitWrite = f->BitValue;
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return this;
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}
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}
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return this;
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}
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@ -1902,7 +1923,15 @@ ExpEmit FxAssign::Emit(VMFunctionBuilder *build)
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result = temp;
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}
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build->Emit(ValueType->GetStoreOp(), pointer.RegNum, result.RegNum, build->GetConstantInt(0));
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if (IsBitWrite == -1)
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{
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build->Emit(ValueType->GetStoreOp(), pointer.RegNum, result.RegNum, build->GetConstantInt(0));
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}
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else
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{
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build->Emit(OP_SBIT, pointer.RegNum, result.RegNum, 1 << IsBitWrite);
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}
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}
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if (AddressRequested)
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@ -1941,12 +1970,19 @@ FxExpression *FxAssignSelf::Resolve(FCompileContext &ctx)
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ExpEmit FxAssignSelf::Emit(VMFunctionBuilder *build)
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{
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assert(ValueType = Assignment->ValueType);
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assert(ValueType == Assignment->ValueType);
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ExpEmit pointer = Assignment->Address; // FxAssign should have already emitted it
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if (!pointer.Target)
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{
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ExpEmit out(build, ValueType->GetRegType());
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build->Emit(ValueType->GetLoadOp(), out.RegNum, pointer.RegNum, build->GetConstantInt(0));
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if (Assignment->IsBitWrite != -1)
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{
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build->Emit(OP_LBIT, out.RegNum, pointer.RegNum, 1 << Assignment->IsBitWrite);
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}
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else
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{
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build->Emit(ValueType->GetLoadOp(), out.RegNum, pointer.RegNum, build->GetConstantInt(0));
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}
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return out;
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}
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else
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@ -1999,11 +2035,29 @@ bool FxBinary::ResolveLR(FCompileContext& ctx, bool castnumeric)
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if (left->ValueType == TypeBool && right->ValueType == TypeBool)
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{
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ValueType = TypeBool;
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if (Operator == '&' || Operator == '|' || Operator == '^' || ctx.FromDecorate)
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{
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ValueType = TypeBool;
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}
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else
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{
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ValueType = TypeSInt32; // math operations on bools result in integers.
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}
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}
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else if (left->ValueType == TypeName && right->ValueType == TypeName)
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{
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ValueType = TypeName;
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// pointers can only be compared for equality.
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if (Operator == TK_Eq || Operator == TK_Neq)
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{
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ValueType = TypeBool;
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return true;
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}
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else
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{
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ScriptPosition.Message(MSG_ERROR, "Invalid operation for names");
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delete this;
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return false;
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}
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}
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else if (left->IsNumeric() && right->IsNumeric())
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{
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@ -2022,13 +2076,25 @@ bool FxBinary::ResolveLR(FCompileContext& ctx, bool castnumeric)
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AreCompatiblePointerTypes(left->ValueType, right->ValueType))
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{
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// pointers can only be compared for equality.
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assert(Operator == TK_Eq || Operator == TK_Neq);
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ValueType = TypeBool;
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if (Operator == TK_Eq || Operator == TK_Neq)
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{
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ValueType = TypeBool;
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return true;
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}
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else
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{
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ScriptPosition.Message(MSG_ERROR, "Invalid operation for pointers");
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delete this;
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return false;
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}
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}
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}
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else
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{
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ValueType = TypeVoid;
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// To check: It may be that this could pass in DECORATE, although setting TypeVoid here would pretty much prevent that.
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ScriptPosition.Message(MSG_ERROR, "Incompatible operator");
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delete this;
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return false;
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}
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assert(ValueType > nullptr && ValueType < (PType*)0xfffffffffffffff);
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@ -2077,7 +2143,7 @@ FxExpression *FxAddSub::Resolve(FCompileContext& ctx)
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{
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ScriptPosition.Message(MSG_ERROR, "Numeric type expected");
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delete this;
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return NULL;
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return nullptr;
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}
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else if (left->isConstant() && right->isConstant())
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{
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@ -2771,7 +2837,7 @@ FxLtGtEq::FxLtGtEq(FxExpression *l, FxExpression *r)
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FxExpression *FxLtGtEq::Resolve(FCompileContext& ctx)
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{
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CHECKRESOLVED();
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if (!ResolveLR(ctx, false)) return NULL;
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if (!ResolveLR(ctx, true)) return NULL;
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if (!left->IsNumeric() || !right->IsNumeric())
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{
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@ -4456,21 +4522,21 @@ FxExpression *FxStructMember::Resolve(FCompileContext &ctx)
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if (classx->ValueType->IsKindOf(RUNTIME_CLASS(PPointer)))
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{
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PPointer *ptrtype = dyn_cast<PPointer>(classx->ValueType);
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if (ptrtype == nullptr || !ptrtype->PointedType->IsA(RUNTIME_CLASS(PStruct)))
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if (ptrtype == nullptr || !ptrtype->PointedType->IsKindOf(RUNTIME_CLASS(PStruct)))
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{
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ScriptPosition.Message(MSG_ERROR, "Member variable requires a struct");
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ScriptPosition.Message(MSG_ERROR, "Member variable requires a struct or class object.");
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delete this;
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return nullptr;
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}
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}
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else if (classx->ValueType->IsA(RUNTIME_CLASS(PStruct)))
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else if (classx->ValueType->IsA(RUNTIME_CLASS(PStruct))) // Classes can never be used as value types so we do not have to consider that case.
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{
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// if this is a struct within a class or another struct we can simplify the expression by creating a new PField with a cumulative offset.
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if (classx->ExprType == EFX_ClassMember || classx->ExprType == EFX_StructMember)
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{
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auto parentfield = static_cast<FxStructMember *>(classx)->membervar;
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// PFields are garbage collected so this will be automatically taken care of later.
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auto newfield = new PField(membervar->SymbolName, membervar->Type, membervar->Flags | parentfield->Flags, membervar->Offset + parentfield->Offset);
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auto newfield = new PField(membervar->SymbolName, membervar->Type, membervar->Flags | parentfield->Flags, membervar->Offset + parentfield->Offset, membervar->BitValue);
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static_cast<FxStructMember *>(classx)->membervar = newfield;
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classx->isresolved = false; // re-resolve the parent so it can also check if it can be optimized away.
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auto x = classx->Resolve(ctx);
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int offsetreg = build->GetConstantInt((int)membervar->Offset);
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ExpEmit loc(build, membervar->Type->GetRegType());
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build->Emit(membervar->Type->GetLoadOp(), loc.RegNum, obj.RegNum, offsetreg);
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if (membervar->BitValue == -1)
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{
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build->Emit(membervar->Type->GetLoadOp(), loc.RegNum, obj.RegNum, offsetreg);
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}
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else
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{
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ExpEmit out(build, REGT_POINTER);
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build->Emit(OP_ADDA_RK, out.RegNum, obj.RegNum, offsetreg);
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build->Emit(OP_LBIT, loc.RegNum, out.RegNum, 1 << membervar->BitValue);
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out.Free(build);
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}
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obj.Free(build);
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return loc;
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}
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@ -4530,7 +4606,8 @@ ExpEmit FxStructMember::Emit(VMFunctionBuilder *build)
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//==========================================================================
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//
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//
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// not really needed at the moment but may become useful with meta properties
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// and some other class-specific extensions.
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//
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//==========================================================================
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@ -4547,28 +4624,6 @@ FxClassMember::FxClassMember(FxExpression *x, PField* mem, const FScriptPosition
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//
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//==========================================================================
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FxExpression *FxClassMember::Resolve(FCompileContext &ctx)
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{
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CHECKRESOLVED();
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SAFE_RESOLVE(classx, ctx);
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PPointer *ptrtype = dyn_cast<PPointer>(classx->ValueType);
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if (ptrtype == NULL || !ptrtype->PointedType->IsKindOf(RUNTIME_CLASS(PClass)))
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{
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ScriptPosition.Message(MSG_ERROR, "Member variable requires a class or object");
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delete this;
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return NULL;
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}
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ValueType = membervar->Type;
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return this;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxArrayElement::FxArrayElement(FxExpression *base, FxExpression *_index)
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:FxExpression(EFX_ArrayElement, base->ScriptPosition)
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{
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@ -703,14 +703,18 @@ class FxAssign : public FxExpression
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{
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FxExpression *Base;
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FxExpression *Right;
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int IsBitWrite;
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bool AddressRequested;
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bool AddressWritable;
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bool IsModifyAssign;
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friend class FxAssignSelf;
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public:
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FxAssign(FxExpression *base, FxExpression *right);
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FxAssign(FxExpression *base, FxExpression *right, bool ismodify = false);
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~FxAssign();
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FxExpression *Resolve(FCompileContext&);
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bool RequestAddress(bool *writable);
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//bool RequestAddress(bool *writable);
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ExpEmit Emit(VMFunctionBuilder *build);
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ExpEmit Address;
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@ -1064,7 +1068,6 @@ class FxClassMember : public FxStructMember
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public:
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FxClassMember(FxExpression*, PField*, const FScriptPosition&);
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FxExpression *Resolve(FCompileContext&);
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};
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//==========================================================================
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@ -170,7 +170,7 @@ static FxExpression *ParseExpressionM (FScanner &sc, PClassActor *cls)
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exp->right = ParseExpressionM(sc, cls);
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FxAssign *ret = new FxAssign(base, exp);
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FxAssign *ret = new FxAssign(base, exp, true);
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left->Assignment = ret;
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return ret;
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}
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@ -24,6 +24,7 @@ struct FFlagDef
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const char *name;
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int structoffset;
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int fieldsize;
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bool deprecated;
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};
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FFlagDef *FindFlag (const PClass *type, const char *part1, const char *part2, bool strict = false);
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@ -54,10 +54,11 @@ static TArray<AFuncDesc> AFTable;
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//==========================================================================
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// [RH] Keep GCC quiet by not using offsetof on Actor types.
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#define DEFINE_FLAG(prefix, name, type, variable) { (unsigned int)prefix##_##name, #name, (int)(size_t)&((type*)1)->variable - 1, sizeof(((type *)0)->variable) }
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#define DEFINE_FLAG2(symbol, name, type, variable) { (unsigned int)symbol, #name, (int)(size_t)&((type*)1)->variable - 1, sizeof(((type *)0)->variable) }
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#define DEFINE_DEPRECATED_FLAG(name) { DEPF_##name, #name, -1, 0 }
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#define DEFINE_DUMMY_FLAG(name) { DEPF_UNUSED, #name, -1, 0 }
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#define DEFINE_FLAG(prefix, name, type, variable) { (unsigned int)prefix##_##name, #name, (int)(size_t)&((type*)1)->variable - 1, sizeof(((type *)0)->variable), false }
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#define DEFINE_FLAG2(symbol, name, type, variable) { (unsigned int)symbol, #name, (int)(size_t)&((type*)1)->variable - 1, sizeof(((type *)0)->variable), false }
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#define DEFINE_FLAG2_DEPRECATED(symbol, name, type, variable) { (unsigned int)symbol, #name, (int)(size_t)&((type*)1)->variable - 1, sizeof(((type *)0)->variable), true }
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#define DEFINE_DEPRECATED_FLAG(name) { DEPF_##name, #name, -1, 0, true }
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#define DEFINE_DUMMY_FLAG(name, deprec) { DEPF_UNUSED, #name, -1, 0, deprec }
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static FFlagDef ActorFlagDefs[]=
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{
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@ -171,7 +172,6 @@ static FFlagDef ActorFlagDefs[]=
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DEFINE_FLAG(MF4, SYNCHRONIZED, AActor, flags4),
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DEFINE_FLAG(MF4, NOTARGETSWITCH, AActor, flags4),
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DEFINE_FLAG(MF4, DONTHARMCLASS, AActor, flags4),
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DEFINE_FLAG2(MF4_DONTHARMCLASS, DONTHURTSPECIES, AActor, flags4), // Deprecated name as an alias
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DEFINE_FLAG(MF4, SHIELDREFLECT, AActor, flags4),
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DEFINE_FLAG(MF4, DEFLECT, AActor, flags4),
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DEFINE_FLAG(MF4, ALLOWPARTICLES, AActor, flags4),
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@ -278,7 +278,11 @@ static FFlagDef ActorFlagDefs[]=
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DEFINE_FLAG(RF, MASKROTATION, AActor, renderflags),
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DEFINE_FLAG(RF, ABSMASKANGLE, AActor, renderflags),
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DEFINE_FLAG(RF, ABSMASKPITCH, AActor, renderflags),
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};
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// These won't be accessible through bitfield variables
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static FFlagDef MoreFlagDefs[] =
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{
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// Bounce flags
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DEFINE_FLAG2(BOUNCE_Walls, BOUNCEONWALLS, AActor, BounceFlags),
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DEFINE_FLAG2(BOUNCE_Floors, BOUNCEONFLOORS, AActor, BounceFlags),
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@ -308,15 +312,16 @@ static FFlagDef ActorFlagDefs[]=
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DEFINE_DEPRECATED_FLAG(DOOMBOUNCE),
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// Deprecated flags with no more existing functionality.
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DEFINE_DUMMY_FLAG(FASTER), // obsolete, replaced by 'Fast' state flag
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DEFINE_DUMMY_FLAG(FASTMELEE), // obsolete, replaced by 'Fast' state flag
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DEFINE_DUMMY_FLAG(FASTER, true), // obsolete, replaced by 'Fast' state flag
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DEFINE_DUMMY_FLAG(FASTMELEE, true), // obsolete, replaced by 'Fast' state flag
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// Various Skulltag flags that are quite irrelevant to ZDoom
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DEFINE_DUMMY_FLAG(NONETID), // netcode-based
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DEFINE_DUMMY_FLAG(ALLOWCLIENTSPAWN), // netcode-based
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DEFINE_DUMMY_FLAG(CLIENTSIDEONLY), // netcode-based
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DEFINE_DUMMY_FLAG(SERVERSIDEONLY), // netcode-based
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DEFINE_DUMMY_FLAG(EXPLODEONDEATH), // seems useless
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DEFINE_DUMMY_FLAG(NONETID, false), // netcode-based
|
||||
DEFINE_DUMMY_FLAG(ALLOWCLIENTSPAWN, false), // netcode-based
|
||||
DEFINE_DUMMY_FLAG(CLIENTSIDEONLY, false), // netcode-based
|
||||
DEFINE_DUMMY_FLAG(SERVERSIDEONLY, false), // netcode-based
|
||||
DEFINE_DUMMY_FLAG(EXPLODEONDEATH, true), // seems useless
|
||||
DEFINE_FLAG2_DEPRECATED(MF4_DONTHARMCLASS, DONTHURTSPECIES, AActor, flags4), // Deprecated name as an alias
|
||||
};
|
||||
|
||||
static FFlagDef InventoryFlagDefs[] =
|
||||
|
@ -372,9 +377,9 @@ static FFlagDef WeaponFlagDefs[] =
|
|||
DEFINE_FLAG(WIF, NODEATHDESELECT, AWeapon, WeaponFlags),
|
||||
DEFINE_FLAG(WIF, NODEATHINPUT, AWeapon, WeaponFlags),
|
||||
|
||||
DEFINE_DUMMY_FLAG(NOLMS),
|
||||
DEFINE_DUMMY_FLAG(NOLMS, false),
|
||||
DEFINE_FLAG(WIF, ALT_USES_BOTH, AWeapon, WeaponFlags),
|
||||
DEFINE_DUMMY_FLAG(ALLOW_WITH_RESPAWN_INVUL),
|
||||
DEFINE_DUMMY_FLAG(ALLOW_WITH_RESPAWN_INVUL, false),
|
||||
};
|
||||
|
||||
static FFlagDef PlayerPawnFlagDefs[] =
|
||||
|
@ -394,6 +399,7 @@ static FFlagDef PowerSpeedFlagDefs[] =
|
|||
static const struct FFlagList { const PClass * const *Type; FFlagDef *Defs; int NumDefs; } FlagLists[] =
|
||||
{
|
||||
{ &RUNTIME_CLASS_CASTLESS(AActor), ActorFlagDefs, countof(ActorFlagDefs) },
|
||||
{ &RUNTIME_CLASS_CASTLESS(AActor), MoreFlagDefs, countof(MoreFlagDefs) },
|
||||
{ &RUNTIME_CLASS_CASTLESS(AInventory), InventoryFlagDefs, countof(InventoryFlagDefs) },
|
||||
{ &RUNTIME_CLASS_CASTLESS(AWeapon), WeaponFlagDefs, countof(WeaponFlagDefs) },
|
||||
{ &RUNTIME_CLASS_CASTLESS(APlayerPawn), PlayerPawnFlagDefs, countof(PlayerPawnFlagDefs) },
|
||||
|
@ -443,7 +449,7 @@ FFlagDef *FindFlag (const PClass *type, const char *part1, const char *part2, bo
|
|||
|
||||
if (part2 == NULL)
|
||||
{ // Search all lists
|
||||
int max = strict ? 1 : NUM_FLAG_LISTS;
|
||||
int max = strict ? 2 : NUM_FLAG_LISTS;
|
||||
for (i = 0; i < max; ++i)
|
||||
{
|
||||
if (type->IsDescendantOf (*FlagLists[i].Type))
|
||||
|
@ -683,4 +689,14 @@ void InitThingdef()
|
|||
symt.AddSymbol(new PField(NAME_Target, TypeActor, VARF_Native, myoffsetof(AActor, target)));
|
||||
symt.AddSymbol(new PField(NAME_Master, TypeActor, VARF_Native, myoffsetof(AActor, master)));
|
||||
symt.AddSymbol(new PField(NAME_Tracer, TypeActor, VARF_Native, myoffsetof(AActor, tracer)));
|
||||
|
||||
// synthesize a symbol for each flag. The bounce flags are excluded on purpose.
|
||||
for (size_t i = 0; i < countof(ActorFlagDefs); i++)
|
||||
{
|
||||
int bit = 0;
|
||||
unsigned val = ActorFlagDefs[i].flagbit;
|
||||
while ((val >>= 1)) bit++;
|
||||
symt.AddSymbol(new PField(FStringf("b%s", ActorFlagDefs[i].name), (ActorFlagDefs[i].fieldsize == 4? TypeSInt32 : TypeSInt16), VARF_Native, ActorFlagDefs[i].structoffset, bit));
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
@ -1836,9 +1836,12 @@ void ZCCCompiler::ProcessDefaultFlag(PClassActor *cls, ZCC_FlagStmt *flg)
|
|||
auto fd = FindFlag(cls, n1, n2, true);
|
||||
if (fd != nullptr)
|
||||
{
|
||||
if (fd->structoffset == -1)
|
||||
if (fd->deprecated)
|
||||
{
|
||||
Warn(flg, "Deprecated flag '%s%s%s' used", n1, n2 ? "." : "", n2 ? n2 : "");
|
||||
}
|
||||
if (fd->structoffset == -1)
|
||||
{
|
||||
HandleDeprecatedFlags((AActor*)cls->Defaults, cls, flg->set, fd->flagbit);
|
||||
}
|
||||
else
|
||||
|
@ -2384,7 +2387,7 @@ static int Pex2Tok[] = {
|
|||
static FxExpression *ModifyAssign(FxBinary *operation, FxExpression *left)
|
||||
{
|
||||
auto assignself = static_cast<FxAssignSelf *>(operation->left);
|
||||
auto assignment = new FxAssign(left, operation);
|
||||
auto assignment = new FxAssign(left, operation, true);
|
||||
assignself->Assignment = assignment;
|
||||
return assignment;
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue