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package com.oracle.truffle.llvm.runtime.nodes.others;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.CachedContext;
import com.oracle.truffle.api.dsl.GenerateUncached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.llvm.runtime.LLVMContext;
import com.oracle.truffle.llvm.runtime.LLVMLanguage;
import com.oracle.truffle.llvm.runtime.LLVMSymbol;
import com.oracle.truffle.llvm.runtime.except.LLVMLinkerException;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMNode;
import com.oracle.truffle.llvm.runtime.pointer.LLVMPointer;

@GenerateUncached
public abstract class LLVMDynAccessSymbolNode extends LLVMNode {

    public LLVMDynAccessSymbolNode() {
    }

    public abstract LLVMPointer execute(LLVMSymbol symbol);

    @Specialization
    LLVMPointer doAccess(LLVMSymbol symbol,
                    @CachedContext(LLVMLanguage.class) LLVMContext context) {
        LLVMPointer value = context.getSymbol(symbol);
        if (value != null) {
            return value;
        }
        CompilerDirectives.transferToInterpreter();
        throw new LLVMLinkerException(this, String.format("External %s %s cannot be found.", symbol.getKind(), symbol.getName()));
    }
}