/*

 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

import java.io.File;

import java.io.FileOutputStream;

import jdk.test.lib.process.OutputAnalyzer;

import java.nio.file.Files;

import java.util.*;

import jdk.internal.org.objectweb.asm.*;

/**

 * The testsets contained in this class are executed by ./VerifierTest_*.java, so that

 * individual testsets can be executed in parallel to shorten the total time required.

 */

public class VerifierTest implements Opcodes {

    // Test verification settings for dumping & runtime

    static final String VFY_ALL = "-Xverify:all";

    static final String VFY_REMOTE = "-Xverify:remote"; // default

    static final String VFY_NONE = "-Xverify:none";

    static final String ERR =

        "ERROR: class VerifierTestC was loaded unexpectedly";

    static final String MAP_FAIL =

        "shared archive file was created with less restrictive verification setting";

    static final String VFY_ERR = "java.lang.VerifyError";

    static final String PASS_RESULT = "Hi, how are you?";

    static final String VFY_INFO_MESSAGE =

        "All non-system classes will be verified (-Xverify:remote) during CDS dump time.";

    enum Testset1Part {

        A, B

    }

    public static void main(String[] args) throws Exception {

        String subCaseId = args[0];

        String jarName_verifier_test_tmp = "verifier_test_tmp" + "_" + subCaseId;

        String jarName_verifier_test = "verifier_test" + "_" + subCaseId;

        String jarName_greet = "greet" + "_" + subCaseId;

        String jarName_hi = "hi" + "_" + subCaseId;

        JarBuilder.build(jarName_verifier_test_tmp, "VerifierTest0", "VerifierTestA",

                         "VerifierTestB", "VerifierTestC", "VerifierTestD", "VerifierTestE",

                         "UnverifiableBase", "UnverifiableIntf", "UnverifiableIntfSub");

        JarBuilder.build(jarName_greet, "Greet");

        JarBuilder.build(jarName_hi, "Hi", "Hi$MyClass");

        File dir = new File(System.getProperty("test.classes", "."));

        File jarSrcFile = new File(dir, jarName_verifier_test_tmp + ".jar");

        File jarFile = new File(dir, jarName_verifier_test + ".jar");

        String jar = jarFile.getPath();

        if (!jarFile.exists() || jarFile.lastModified() < jarSrcFile.lastModified()) {

            createTestJarFile(jarSrcFile, jarFile);

        } else {

            System.out.println("Already up-to-date: " + jarFile);

        }

        String noAppClasses[] = TestCommon.list("");

        String appClasses[] = TestCommon.list("UnverifiableBase",

                                              "UnverifiableIntf",

                                              "UnverifiableIntfSub",

                                              "VerifierTestA",

                                              "VerifierTestB",

                                              "VerifierTestC",

                                              "VerifierTestD",

                                              "VerifierTestE",

                                              "VerifierTest0");

        switch (subCaseId) {

        case "0":         testset_0(jar, noAppClasses, appClasses);                 return;

        case "1A":        testset_1(jar, noAppClasses, appClasses, Testset1Part.A); return;

        case "1B":        testset_1(jar, noAppClasses, appClasses, Testset1Part.B); return;

        case "2":         testset_2(jarName_greet, jarName_hi);                   return;

        default:

            throw new RuntimeException("Unknown option: " + subCaseId);

        }

    }

    static void testset_0(String jar, String[] noAppClasses, String[] appClasses) throws Exception {

        // Dumping should fail if the IgnoreUnverifiableClassesDuringDump

        // option is not enabled.

        OutputAnalyzer output = TestCommon.dump(jar, appClasses,

                            "-XX:+UnlockDiagnosticVMOptions",

                            "-XX:-IgnoreUnverifiableClassesDuringDump");

        output.shouldContain("Please remove the unverifiable classes");

        output.shouldHaveExitValue(1);

        // By default, bad classes should be ignored during dumping.

        TestCommon.testDump(jar, appClasses);

    }

    static void checkRuntimeOutput(OutputAnalyzer output, String expected) throws Exception {

        output.shouldContain(expected);

        if (expected.equals(PASS_RESULT) ||

            expected.equals(VFY_ERR)) {

            output.shouldHaveExitValue(0);

        } else {

            output.shouldNotHaveExitValue(0);

        }

    }

    static void testset_1(String jar, String[] noAppClasses, String[] appClasses, Testset1Part part)

        throws Exception

    {

        String config[][] = {

            // {dump_list, dumptime_verification_setting,

            //  runtime_verification_setting, expected_output_str},

            // Dump app/ext with -Xverify:remote

            {"app",   VFY_REMOTE, VFY_REMOTE, VFY_ERR},

            {"app",   VFY_REMOTE, VFY_ALL,    MAP_FAIL},

            {"app",   VFY_REMOTE, VFY_NONE,   ERR },

            // Dump app/ext with -Xverify:all

            {"app",   VFY_ALL,    VFY_REMOTE, VFY_ERR },

            {"app",   VFY_ALL,    VFY_ALL,    VFY_ERR },

            {"app",   VFY_ALL,    VFY_NONE,   ERR },

            // Dump app/ext with -Xverify:none

            {"app",   VFY_NONE,   VFY_REMOTE, VFY_ERR},

            {"app",   VFY_NONE,   VFY_ALL,    MAP_FAIL},

            {"app",   VFY_NONE,   VFY_NONE,   ERR },

            // Dump sys only with -Xverify:remote

            {"noApp", VFY_REMOTE, VFY_REMOTE, VFY_ERR},

            {"noApp", VFY_REMOTE, VFY_ALL,    VFY_ERR},

            {"noApp", VFY_REMOTE, VFY_NONE,   ERR},

            // Dump sys only with -Xverify:all

            {"noApp", VFY_ALL, VFY_REMOTE,    VFY_ERR},

            {"noApp", VFY_ALL, VFY_ALL,       VFY_ERR},

            {"noApp", VFY_ALL, VFY_NONE,      ERR},

            // Dump sys only with -Xverify:none

            {"noApp", VFY_NONE, VFY_REMOTE,   VFY_ERR},

            {"noApp", VFY_NONE, VFY_ALL,      VFY_ERR},

            {"noApp", VFY_NONE, VFY_NONE,     ERR},

        };

        int loop_start, loop_stop;

        // Further break down testset_1 into two parts (to be invoked from VerifierTest_1A.java

        // and VerifierTest_1B.java) to improve parallel test execution time.

        switch (part) {

        case A:

            loop_start = 0;

            loop_stop  = 9;

            break;

        case B:

        default:

            assert part == Testset1Part.B;

            loop_start = 9;

            loop_stop  = config.length;

            break;

        }

        String prev_dump_setting = "";

        for (int i = loop_start; i < loop_stop; i ++) {

            String dump_list[] = config[i][0].equals("app") ? appClasses :

                noAppClasses;

            String dump_setting = config[i][1];

            String runtime_setting = config[i][2];

            String expected_output_str = config[i][3];

            System.out.println("Test case [" + i + "]: dumping " + config[i][0] +

                               " with " + dump_setting +

                               ", run with " + runtime_setting);

            if (!dump_setting.equals(prev_dump_setting)) {

                OutputAnalyzer dumpOutput = TestCommon.dump(

                                                            jar, dump_list, dump_setting,

                                                            // FIXME: the following options are for working around a GC

                                                            // issue - assert failure when dumping archive with the -Xverify:all

                                                            "-Xms256m",

                                                            "-Xmx256m");

                if (dump_setting.equals(VFY_NONE) &&

                    runtime_setting.equals(VFY_REMOTE)) {

                    dumpOutput.shouldContain(VFY_INFO_MESSAGE);

                }

            }

            TestCommon.run("-cp", jar,

                           runtime_setting,

                           "VerifierTest0")

                .ifNoMappingFailure(output -> checkRuntimeOutput(output, expected_output_str));

            prev_dump_setting = dump_setting;

        }

    }

    static void testset_2(String jarName_greet, String jarName_hi) throws Exception {

        String appClasses[];

        String jar;

        // The following section is for testing the scenarios where

        // the classes are verifiable during dump time.

        appClasses = TestCommon.list("Hi",

                                     "Greet",

                                     "Hi$MyClass");

        jar = TestCommon.getTestJar(jarName_hi + ".jar") + File.pathSeparator +

            TestCommon.getTestJar(jarName_greet + ".jar");

        String config2[][] = {

            // {dump_list, dumptime_verification_setting,

            //  runtime_verification_setting, expected_output_str},

            // Dump app/ext with -Xverify:remote

            {"app",   VFY_REMOTE, VFY_REMOTE, PASS_RESULT},

            {"app",   VFY_REMOTE, VFY_ALL,    MAP_FAIL},

            {"app",   VFY_REMOTE, VFY_NONE,   PASS_RESULT },

            // Dump app/ext with -Xverify:all

            {"app",   VFY_ALL,    VFY_REMOTE, PASS_RESULT },

            {"app",   VFY_ALL,    VFY_ALL,    PASS_RESULT },

            {"app",   VFY_ALL,    VFY_NONE,   PASS_RESULT },

            // Dump app/ext with -Xverify:none

            {"app",   VFY_NONE,   VFY_REMOTE, PASS_RESULT},

            {"app",   VFY_NONE,   VFY_ALL,    MAP_FAIL},

            {"app",   VFY_NONE,   VFY_NONE,   PASS_RESULT },

        };

        String prev_dump_setting = "";

        for (int i = 0; i < config2.length; i ++) {

            // config2[i][0] is always set to "app" in this test

            String dump_setting = config2[i][1];

            String runtime_setting = config2[i][2];

            String expected_output_str = config2[i][3];

            System.out.println("Test case [" + i + "]: dumping " + config2[i][0] +

                               " with " + dump_setting +

                               ", run with " + runtime_setting);

            if (!dump_setting.equals(prev_dump_setting)) {

                OutputAnalyzer dumpOutput = TestCommon.dump(

                                                            jar, appClasses, dump_setting,

                                                            // FIXME: the following options are for working around a GC

                                                            // issue - assert failure when dumping archive with the -Xverify:all

                                                            "-Xms256m",

                                                            "-Xmx256m");

                if (dump_setting.equals(VFY_NONE) &&

                    runtime_setting.equals(VFY_REMOTE)) {

                    dumpOutput.shouldContain(VFY_INFO_MESSAGE);

                }

            }

            TestCommon.run("-cp", jar,

                           runtime_setting,

                           "Hi")

                .ifNoMappingFailure(output -> checkRuntimeOutput(output, expected_output_str));

           prev_dump_setting = dump_setting;

        }

    }

    static void createTestJarFile(File jarSrcFile, File jarFile) throws Exception {

        jarFile.delete();

        Files.copy(jarSrcFile.toPath(), jarFile.toPath());

        File dir = new File(System.getProperty("test.classes", "."));

        File outdir = new File(dir, "verifier_test_classes");

        outdir.mkdir();

        writeClassFile(new File(outdir, "UnverifiableBase.class"), makeUnverifiableBase());

        writeClassFile(new File(outdir, "UnverifiableIntf.class"), makeUnverifiableIntf());

        JarBuilder.update(jarFile.getPath(), outdir.getPath());

    }

    static void writeClassFile(File file, byte bytecodes[]) throws Exception {

        try (FileOutputStream fos = new FileOutputStream(file)) {

            fos.write(bytecodes);

        }

    }

    // This was obtained using JDK8: java jdk.internal.org.objectweb.asm.util.ASMifier tmpclasses/UnverifiableBase.class

    static byte[] makeUnverifiableBase() throws Exception {

        ClassWriter cw = new ClassWriter(0);

        FieldVisitor fv;

        MethodVisitor mv;

        AnnotationVisitor av0;

        cw.visit(V1_8, ACC_SUPER, "UnverifiableBase", null, "java/lang/Object", null);

        {

            fv = cw.visitField(ACC_FINAL + ACC_STATIC, "x", "LVerifierTest;", null, null);

            fv.visitEnd();

        }

        {

            mv = cw.visitMethod(0, "<init>", "()V", null, null);

            mv.visitCode();

            mv.visitVarInsn(ALOAD, 0);

            mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);

            mv.visitInsn(RETURN);

            mv.visitMaxs(1, 1);

            mv.visitEnd();

        }

        {

            mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);

            mv.visitCode();

            mv.visitTypeInsn(NEW, "VerifierTest0");

            mv.visitInsn(DUP);

            mv.visitMethodInsn(INVOKESPECIAL, "VerifierTest0", "<init>", "()V", false);

            mv.visitFieldInsn(PUTSTATIC, "UnverifiableBase", "x", "LVerifierTest;");

            mv.visitInsn(RETURN);

            mv.visitMaxs(2, 0);

            mv.visitEnd();

        }

        addBadMethod(cw);

        cw.visitEnd();

        return cw.toByteArray();

    }

    // This was obtained using JDK8: java jdk.internal.org.objectweb.asm.util.ASMifier tmpclasses/UnverifiableIntf.class

    static byte[] makeUnverifiableIntf() throws Exception {

        ClassWriter cw = new ClassWriter(0);

        FieldVisitor fv;

        MethodVisitor mv;

        AnnotationVisitor av0;

        cw.visit(V1_8, ACC_ABSTRACT + ACC_INTERFACE, "UnverifiableIntf", null, "java/lang/Object", null);

        {

            fv = cw.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, "x", "LVerifierTest0;", null, null);

            fv.visitEnd();

        }

        {

            mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);

            mv.visitCode();

            mv.visitTypeInsn(NEW, "VerifierTest0");

            mv.visitInsn(DUP);

            mv.visitMethodInsn(INVOKESPECIAL, "VerifierTest0", "<init>", "()V", false);

            mv.visitFieldInsn(PUTSTATIC, "UnverifiableIntf", "x", "LVerifierTest0;");

            mv.visitInsn(RETURN);

            mv.visitMaxs(2, 0);

            mv.visitEnd();

        }

        addBadMethod(cw);

        cw.visitEnd();

        return cw.toByteArray();

    }

    // Add a bad method to make the class fail verification.

    static void addBadMethod(ClassWriter cw) throws Exception {

        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "bad", "()V", null, null);

        mv.visitCode();

        mv.visitInsn(ARETURN); //  java.lang.VerifyError: Operand stack underflow

        mv.visitMaxs(2, 2);

        mv.visitEnd();

    }

}