test/hotspot/jtreg/vmTestbase/nsk/jvmti/SetNativeMethodPrefix/SetNativeMethodPrefix001.java
author jiangli
Fri, 02 Nov 2018 19:30:31 -0400 (2018-11-02)
changeset 52397 1322829d1501
parent 50260 46c67f5e27c2
permissions -rw-r--r--
8209564: runtime/appcds/CDSandJFR.java timeout on tier6 on sparc Summary: Set timeout 500 in CDSandJFR.java Reviewed-by: dcubed
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/*
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 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package nsk.jvmti.SetNativeMethodPrefix;
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import java.io.*;
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import nsk.share.Consts;
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/* ============================================================================== */
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/* Quote from JVMTI specification v.1.1.102:
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 *
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 *     Since native methods cannot be directly instrumented (they have no
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 *     bytecodes), they must be wrapped with a non-native method which can be
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 *     instrumented. For example, if we had:
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 *             native boolean foo(int x);
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 *
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 *     We could transform the class file (with the ClassFileLoadHook event) so
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 *     that this becomes:
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 *         boolean foo(int x) {
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 *             ... record entry to foo ...
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 *             return wrapped_foo(x);
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 *         }
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 *
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 *         native boolean wrapped_foo(int x);
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 *
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 *     Where foo becomes a wrapper for the actual native method with the appended
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 *     prefix "wrapped_".
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 *
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 *     The wrapper will allow data to be collected on the native method call, but
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 *     now the problem becomes linking up the wrapped method with the native
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 *     implementation. That is, the method wrapped_foo needs to be resolved to the
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 *     native implementation of foo, which might be:
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 *
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 *         Java_somePackage_someClass_foo(JNIEnv* env, jint x)
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 *
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 *     This function allows the prefix to be specified and the proper resolution
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 *     to occur. Specifically, when the standard resolution fails, the resolution
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 *     is retried taking the prefix into consideration. There are two ways that
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 *     resolution occurs, explicit resolution with the JNI function
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 *     RegisterNatives and the normal automatic resolution. For RegisterNatives,
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 *     the VM will attempt this association:
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 *
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 *         method(foo) -> nativeImplementation(foo)
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 *
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 *     When this fails, the resolution will be retried with the specified prefix
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 *     prepended to the method name, yielding the correct resolution:
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 *
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 *         method(wrapped_foo) -> nativeImplementation(foo)
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 *
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 *     For automatic resolution, the VM will attempt:
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 *
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 *         method(wrapped_foo) -> nativeImplementation(wrapped_foo)
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 *
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 *     When this fails, the resolution will be retried with the specified prefix
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 *     deleted from the implementation name, yielding the correct resolution:
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 *
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 *         method(wrapped_foo) -> nativeImplementation(foo)
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 *
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 *     Note that since the prefix is only used when standard resolution fails,
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 *     native methods can be wrapped selectively.
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 */
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/* ============================================================================== */
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/* ======================================================= */
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// Auxiliary classes for explicit method resolution
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/* ======================================================= */
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class ExplicitResolution1 {
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    static public int foo() { return wrapped_foo(); }
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    native static public int wrapped_foo();
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}
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/* ======================================================= */
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class ExplicitResolution2 {
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    native static public int wrapped_foo();
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}
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/* ======================================================= */
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// Auxiliary classes for automatic resolution
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/* ======================================================= */
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class AutomaticResolution1 {
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    static public int foo() { return wrapped_foo(); }
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    native static public int wrapped_foo();
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}
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/* ======================================================= */
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class AutomaticResolution2 {
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    static public int foo() { return wrapped_foo(); }
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    native static public int wrapped_foo();
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}
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/* ======================================================= */
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class AutomaticResolution3 {
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    static public int foo() { return wrapped_foo(); }
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    native static public int wrapped_foo();
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}
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/* ======================================================= */
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public class SetNativeMethodPrefix001 {
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    PrintStream out = System.out;
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    static public final String prefix = "wrapped_";
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    /* ============================================================ */
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    //
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    //  For RegisterNatives, the VM will attempt this association:
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    //
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    //      method(foo) -> nativeImplementation(foo)
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    //
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    //  When this fails, the resolution will be retried with the specified
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    //  prefix prepended to the method name, yielding the correct resolution:
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    //
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    //      method(wrapped_foo) -> nativeImplementation(foo)
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    //
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    //  The prefix is only used when standard resolution fails.
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    //
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    /* ============================================================ */
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    public boolean checkExplicitResolution1(boolean isPrefixSet) {
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        // Initiate class A loading and initialization
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        // See CR 6493522 for details
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        new ExplicitResolution1();
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        // Bind ExplicitResolution1.foo() to a native function.
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        // If the prefix isn't set, this code should fail since ExplicitResolution1.foo() isn't native.
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        if (Binder.registerMethod(ExplicitResolution1.class, "foo", "()I", Binder.FUNCTION_FOO) != isPrefixSet)
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        {
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            out.println("ERROR: unexpected RegisterNatives() behavior.");
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            return false;
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        }
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        if (isPrefixSet) {
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            if (ExplicitResolution1.foo() != Binder.FOO_RETURN) {
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                out.println("ERROR: native method wrapped_foo() wasn't correctly bound.");
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                return false;
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            }
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        }
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        // Bind ExplicitResolution1.wrapped_foo() to a native fucntion.
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        // This code should succeed since ExplicitResolution1.wrapped_foo() is native.
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        if (!Binder.registerMethod(ExplicitResolution1.class, "wrapped_foo", "()I", Binder.FUNCTION_WRAPPED_FOO))
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        {
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            out.println("ERROR: RegisterNative() failed for native method ExplicitResolution1.wrapped_foo().");
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            return false;
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        }
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   165
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        if (ExplicitResolution1.foo() != Binder.WRAPPED_FOO_RETURN) {
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            out.println("ERROR: native method wrapped_foo() wasn't correctly bound.");
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            return false;
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        }
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        return true;
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    }
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    /* ============================================================ */
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    public boolean checkExplicitResolution2() {
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        // Initiate class ExplicitResolution2 loading and initialization
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        // See CR 6493522 for details
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        new ExplicitResolution2();
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   178
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        // This binding should fail whether the prefix is set or not since:
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        //    - there's no Java_nsk_jvmti_SetNativeMethodPrefix_ExplicitResolution2_wrapped_1foo defined
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        //    - class ExplicitResolution2 doesn't have java method foo()
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        if (Binder.registerMethod(ExplicitResolution2.class, "foo", "()I", Binder.FUNCTION_WRAPPED_FOO)) {
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            out.println("ERROR: unexpected RegisterNatives() behavior.");
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            return false;
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        }
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        return true;
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    }
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   189
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    /* ============================================================ */
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    public boolean checkExplicitResolution (boolean isMultiplePrefixes) {
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        // Setting method prefix
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        out.println("\tSetting prefix: "+prefix);
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        if (isMultiplePrefixes) {
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            if (!Binder.setMultiplePrefixes(prefix)) { return false; }
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        } else {
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            if (!Binder.setMethodPrefix(prefix)) { return false; }
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        }
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   199
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        // Check the behavior
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        out.println("\t\tChecking resolution for ExplicitResolution1");
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        if (!checkExplicitResolution1(true)) { return false; }
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        out.println("\t\tChecking resolution for ExplicitResolution2");
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        if (!checkExplicitResolution2()) { return false; }
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        // Resetting method prefix
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        out.println("\tResetting prefix");
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        if (isMultiplePrefixes) {
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            if (!Binder.setMultiplePrefixes(null)) { return false; }
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        } else {
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            if (!Binder.setMethodPrefix(null)) { return false; }
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        }
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        // Check the behavior
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        out.println("\t\tChecking resolution for ExplicitResolution1");
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        if (!checkExplicitResolution1(false)) { return false; }
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        out.println("\t\tChecking resolution for ExplicitResolution2");
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        if (!checkExplicitResolution2()) { return false; }
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   219
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        return true;
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   221
    }
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   222
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    /* ============================================================ */
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    //  For automatic resolution, the VM will attempt:
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    //
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    //      method(wrapped_foo) -> nativeImplementation(wrapped_foo)
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   227
    //
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    //  When this fails, the resolution will be retried with the specified
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    //  prefix deleted from the implementation name, yielding the correct
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   230
    //  resolution:
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    //
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    //      method(wrapped_foo) -> nativeImplementation(foo)
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    //
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    //  The prefix is only used when standard resolution fails.
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   235
    /* ============================================================ */
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   236
    public boolean checkAutomaticResolution1() {
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        if (AutomaticResolution1.foo() != Binder.WRAPPED_FOO_RETURN) {
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            out.println("ERROR: native method AutomaticResolution1.wrapped_foo() wasn't correctly bound.");
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            return false;
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   240
        }
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   241
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        return true;
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   243
    }
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    /* ============================================================ */
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    public boolean checkAutomaticResolution2 (boolean isPrefixSet) {
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        if (isPrefixSet) {
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            if (AutomaticResolution2.foo() != Binder.FOO_RETURN) {
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                out.println("ERROR: native method AutomaticResolution2.wrapped_foo() wasn't correctly bound.");
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                return false;
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   251
            }
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   252
        } else {
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   253
            try {
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                AutomaticResolution3.foo();
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                out.println("ERROR: native method AutomaticResolution3.wrapped_foo() was bound.");
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                return false;
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   257
            } catch (UnsatisfiedLinkError e) {
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                out.println(String.format("The method isn't bound: %s %s\n", e.getClass().getName(), e.getMessage()));
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                return true;
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   260
            }
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   261
        }
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   262
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        return true;
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   264
    }
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   265
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    /* ============================================================ */
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    public boolean checkAutomaticResolution (boolean isMultiplePrefixes) {
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        // Setting method prefix
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        out.println("\tSetting prefix: "+prefix);
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   270
        if (isMultiplePrefixes) {
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            if (!Binder.setMultiplePrefixes(prefix)) { return false; }
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   272
        } else {
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            if (!Binder.setMethodPrefix(prefix)) { return false; }
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   274
        }
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   275
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        // Check the behavior
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        out.println("\t\tChecking resolution for AutomaticResolution1");
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        if (!checkAutomaticResolution1()) { return false; }
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        out.println("\t\tChecking resolution for AutomaticResolution2");
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        if (!checkAutomaticResolution2(true)) { return false; }
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        // Resetting method prefix
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        out.println("\tResetting prefix");
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        if (isMultiplePrefixes) {
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            if (!Binder.setMultiplePrefixes(null)) { return false; }
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        } else {
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            if (!Binder.setMethodPrefix(null)) { return false; }
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        }
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        // Check the behavior
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        out.println("\t\tChecking resolution for AutomaticResolution1");
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        if (!checkAutomaticResolution1()) { return false; }
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        out.println("\t\tChecking resolution for AutomaticResolution2");
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        if (!checkAutomaticResolution2(false)) { return false; }
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        return true;
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    }
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    /* ============================================================ */
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    public boolean runIt(String [] args, PrintStream _out) {
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        if (_out != null) {
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            out = _out;
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        }
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        out.println("\nAutomatic resolution; SetMethodPrefix is used");
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        if (!checkAutomaticResolution(true)) { return false; }
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        out.println("\nAutomatic resolution; SetMultiplePrefixes is used");
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        if (!checkAutomaticResolution(false)) { return false; }
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        out.println("\nExplicit resolution; SetMethodPrefix is used");
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        if (!checkExplicitResolution(true)) { return false; }
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        out.println("\nExplicit resolution; SetMultiplePrefixes is used");
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        if (!checkExplicitResolution(false)) { return false; }
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        return true;
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    }
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    /* ============================================================ */
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    public static int run(String argv[], PrintStream out) {
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        if ((new SetNativeMethodPrefix001()).runIt(argv, out)) {
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            out.println("TEST PASSED");
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            return Consts.TEST_PASSED;
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        } else {
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            out.println("TEST FAILED");
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            return Consts.TEST_FAILED;
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        }
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    }
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    /* ============================================================ */
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    public static void main(String[] argv) {
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        argv = nsk.share.jvmti.JVMTITest.commonInit(argv);
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        System.exit(run(argv, System.out) + Consts.JCK_STATUS_BASE);
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    }
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}