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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * The Universal Permissive License (UPL), Version 1.0
 *
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 * 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
 * freely licensable by each licensor hereunder covering either (i) the
 * 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),
 *
 * 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
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 * This license is subject to the following condition:
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package com.oracle.truffle.sl.tools;

import java.io.IOException;
import java.lang.reflect.Field;

import com.oracle.truffle.api.instrument.Instrumenter;
import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.api.vm.PolyglotEngine;
import com.oracle.truffle.api.vm.PolyglotEngine.Value;
import com.oracle.truffle.tools.CoverageTracker;

/**
 * Temporary demonstration of code coverage counting.
 * <p>
 * This reflective access will become unnecessary when tool-related PolyglotEngine APIs are in
 * place.
 */
public class SLCoverage {
    public static void main(String[] args) throws IOException, NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
        PolyglotEngine vm = PolyglotEngine.newBuilder().build();
        assert vm.getLanguages().containsKey("application/x-sl");
        final Field field = PolyglotEngine.class.getDeclaredField("instrumenter");
        field.setAccessible(true);
        final Instrumenter instrumenter = (Instrumenter) field.get(vm);
        final CoverageTracker coverageTracker = new CoverageTracker();
        instrumenter.install(coverageTracker);

        int repeats = 1;
        if (args.length >= 2) {
            repeats = Integer.parseInt(args[1]);
        }

        if (args.length == 0) {
            throw new IOException("No SL source file specified.");
        }
        final Source source = Source.fromFileName(args[0]);

        vm.eval(source);
        Value main = vm.findGlobalSymbol("main");
        if (main == null) {
            throw new IOException("No function main() defined in SL source file.");
        }
        while (repeats-- > 0) {
            main.invoke(null);
        }
        coverageTracker.print(System.out);
    }
}