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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
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 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
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 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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package com.oracle.truffle.llvm.nodes.intrinsics.llvm;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.NodeChildren;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.llvm.runtime.LLVMAddress;
import com.oracle.truffle.llvm.runtime.memory.LLVMMemory;
import com.oracle.truffle.llvm.runtime.memory.LLVMProfiledMemSet;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;

public abstract class LLVMMemoryIntrinsic extends LLVMExpressionNode {

    @NodeChildren({@NodeChild(type = LLVMExpressionNode.class)})
    public abstract static class LLVMMalloc extends LLVMMemoryIntrinsic {

        @Specialization
        public LLVMAddress executeVoid(int size) {
            try {
                return LLVMMemory.allocateMemory(size);
            } catch (OutOfMemoryError e) {
                CompilerDirectives.transferToInterpreter();
                return LLVMAddress.nullPointer();
            }
        }

        @Specialization
        public LLVMAddress executeVoid(long size) {
            try {
                return LLVMMemory.allocateMemory(size);
            } catch (OutOfMemoryError e) {
                CompilerDirectives.transferToInterpreter();
                return LLVMAddress.nullPointer();
            }
        }
    }

    @NodeChildren({@NodeChild(type = LLVMExpressionNode.class), @NodeChild(type = LLVMExpressionNode.class)})
    public abstract static class LLVMCalloc extends LLVMMemoryIntrinsic {
        private final LLVMProfiledMemSet profiledMemSet = new LLVMProfiledMemSet();

        @Specialization
        public LLVMAddress executeVoid(int n, int size) {
            try {
                long length = Math.multiplyExact(n, size);
                LLVMAddress address = LLVMMemory.allocateMemory(length);
                profiledMemSet.memset(address, (byte) 0, length);
                return address;
            } catch (OutOfMemoryError | ArithmeticException e) {
                CompilerDirectives.transferToInterpreter();
                return LLVMAddress.nullPointer();
            }
        }

        @Specialization
        public LLVMAddress executeVoid(long n, long size) {
            try {
                long length = Math.multiplyExact(n, size);
                LLVMAddress address = LLVMMemory.allocateMemory(length);
                profiledMemSet.memset(address, (byte) 0, length);
                return address;
            } catch (OutOfMemoryError | ArithmeticException e) {
                CompilerDirectives.transferToInterpreter();
                return LLVMAddress.nullPointer();
            }
        }
    }

    @NodeChildren({@NodeChild(type = LLVMExpressionNode.class), @NodeChild(type = LLVMExpressionNode.class)})
    public abstract static class LLVMRealloc extends LLVMMemoryIntrinsic {

        @Specialization
        public LLVMAddress executeVoid(LLVMAddress addr, int size) {
            try {
                return LLVMMemory.reallocateMemory(addr, size);
            } catch (OutOfMemoryError e) {
                CompilerDirectives.transferToInterpreter();
                return LLVMAddress.nullPointer();
            }
        }

        @Specialization
        public LLVMAddress executeVoid(LLVMAddress addr, long size) {
            try {
                return LLVMMemory.reallocateMemory(addr, size);
            } catch (OutOfMemoryError e) {
                CompilerDirectives.transferToInterpreter();
                return LLVMAddress.nullPointer();
            }
        }
    }

    @NodeChildren({@NodeChild(type = LLVMExpressionNode.class)})
    public abstract static class LLVMFree extends LLVMMemoryIntrinsic {

        @Specialization
        public Object executeVoid(LLVMAddress address) {
            LLVMMemory.free(address);
            return null;
        }
    }
}