com.oracle.truffle.nfi.NFIRootNode Maven / Gradle / Ivy

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/*
 * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
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 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
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 * without restriction, including without limitation the rights to copy, create
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
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 * This license is subject to the following condition:
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 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
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package com.oracle.truffle.nfi;

import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.Cached.Shared;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.interop.InteropException;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.nodes.DirectCallNode;
import com.oracle.truffle.api.nodes.ExplodeLoop;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
import com.oracle.truffle.nfi.NFIRootNodeFactory.LookupAndBindNodeGen;

class NFIRootNode extends RootNode {

    abstract static class LookupAndBindNode extends Node {

        private final String name;
        private final String signature;

        LookupAndBindNode(String name, String signature) {
            this.name = name;
            this.signature = signature;
        }

        abstract Object execute(Object library);

        @Specialization(limit = "1")
        Object doLookupAndBind(Object library,
                        @CachedLibrary("library") InteropLibrary libInterop,
                        @Shared("symInterop") @CachedLibrary(limit = "1") InteropLibrary symInterop) {
            try {
                Object symbol = libInterop.readMember(library, name);
                return symInterop.invokeMember(symbol, "bind", signature);
            } catch (InteropException ex) {
                CompilerDirectives.transferToInterpreter();
                throw new NFIPreBindException(ex.getMessage(), this);
            }
        }
    }

    @Child DirectCallNode loadLibrary;
    @Children LookupAndBindNode[] lookupAndBind;

    NFIRootNode(NFILanguage language, CallTarget loadLibrary, NativeSource source) {
        super(language);
        this.loadLibrary = DirectCallNode.create(loadLibrary);
        this.lookupAndBind = new LookupAndBindNode[source.preBoundSymbolsLength()];

        for (int i = 0; i < lookupAndBind.length; i++) {
            lookupAndBind[i] = LookupAndBindNodeGen.create(source.getPreBoundSymbol(i), source.getPreBoundSignature(i));
        }
    }

    @Override
    public boolean isInternal() {
        return true;
    }

    @Override
    @ExplodeLoop
    public Object execute(VirtualFrame frame) {
        Object library = loadLibrary.call();
        if (lookupAndBind.length == 0) {
            return library;
        } else {
            NFILibrary ret = new NFILibrary(library);
            for (LookupAndBindNode l : lookupAndBind) {
                ret.preBindSymbol(l.name, l.execute(library));
            }
            return ret;
        }
    }
}