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 * (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
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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package com.oracle.graal.python.builtins.objects.cext.capi;

import java.util.logging.Level;

import com.oracle.graal.python.PythonLanguage;
import com.oracle.graal.python.builtins.objects.frame.PFrame;
import com.oracle.graal.python.nodes.frame.GetCurrentFrameRef;
import com.oracle.graal.python.nodes.util.CannotCastException;
import com.oracle.graal.python.nodes.util.CastToJavaLongLossyNode;
import com.oracle.graal.python.runtime.GilNode;
import com.oracle.graal.python.runtime.PythonContext;
import com.oracle.graal.python.runtime.PythonOptions;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.TruffleLogger;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Cached.Exclusive;
import com.oracle.truffle.api.instrumentation.AllocationReporter;
import com.oracle.truffle.api.interop.ArityException;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import com.oracle.truffle.api.nodes.Node;

@ExportLibrary(InteropLibrary.class)
public class PyTruffleObjectAlloc implements TruffleObject {
    private static final TruffleLogger LOGGER = PythonLanguage.getLogger(PyTruffleObjectAlloc.class);

    @ExportMessage
    boolean isExecutable() {
        return true;
    }

    protected static PythonContext getContext(Node node) {
        return PythonContext.get(node);
    }

    @ExportMessage
    Object execute(Object[] arguments,
                    @Cached CastToJavaLongLossyNode castToJavaLongNode,
                    @Cached GetCurrentFrameRef getCurrentFrameRef,
                    @CachedLibrary(limit = "3") InteropLibrary lib,
                    @Cached(value = "getAllocationReporter(getContext(lib))", allowUncached = true) AllocationReporter reporter, @Exclusive @Cached GilNode gil) throws ArityException {
        boolean mustRelease = gil.acquire();
        try {
            if (arguments.length != 2) {
                CompilerDirectives.transferToInterpreterAndInvalidate();
                throw ArityException.create(2, 2, arguments.length);
            }

            Object allocatedObject = arguments[0];
            Object sizeObject = arguments[1];
            long objectSize;
            try {
                objectSize = castToJavaLongNode.execute(sizeObject);
            } catch (CannotCastException e) {
                CompilerDirectives.transferToInterpreterAndInvalidate();
                throw new IllegalArgumentException("invalid type for second argument 'objectSize'");
            }

            // memory management
            PythonContext context = getContext(lib);
            CApiContext cApiContext = context.getCApiContext();
            cApiContext.increaseMemoryPressure(objectSize, lib);

            boolean isLoggable = LOGGER.isLoggable(Level.FINER);
            boolean traceNativeMemory = context.getOption(PythonOptions.TraceNativeMemory);
            boolean reportAllocation = reporter.isActive();
            if (isLoggable || traceNativeMemory || reportAllocation) {
                if (isLoggable) {
                    LOGGER.finer(() -> String.format("Allocated memory at %s (size: %d bytes)", CApiContext.asHex(allocatedObject), objectSize));
                }
                if (traceNativeMemory) {
                    PFrame.Reference ref = null;
                    if (context.getOption(PythonOptions.TraceNativeMemoryCalls)) {
                        ref = getCurrentFrameRef.execute(null);
                        ref.markAsEscaped();
                    }
                    cApiContext.traceAlloc(CApiContext.asPointer(allocatedObject, lib), ref, null, objectSize);
                }
                if (reportAllocation) {
                    reporter.onEnter(null, 0, objectSize);
                    reporter.onReturnValue(allocatedObject, 0, objectSize);
                }
                return 0;
            }
            return -2;
        } finally {
            gil.release(mustRelease);
        }
    }

    static AllocationReporter getAllocationReporter(PythonContext context) {
        return context.getEnv().lookup(AllocationReporter.class);
    }

}
