test/jdk/java/foreign/loaderLookup/libLoaderLookupInvoker.cpp

/*
 * Copyright (c) 2022, 2024, 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.
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 */

#include "jni.h"
#include "testlib_threads.hpp"

struct Context {
    JavaVM* jvm;
    jobject res;
};

void call(void* ctxt) {
    Context* context = (Context*) ctxt;
    JNIEnv* env;
    context->jvm->AttachCurrentThread((void**)&env, nullptr);
    jclass symbolLookupClass = env->FindClass("java/lang/foreign/SymbolLookup");
    jmethodID loaderLookupMethod = env->GetStaticMethodID(symbolLookupClass, "loaderLookup", "()Ljava/lang/foreign/SymbolLookup;");
    context->res = env->NewGlobalRef(env->CallStaticObjectMethod(symbolLookupClass, loaderLookupMethod));
    context->jvm->DetachCurrentThread();
}

extern "C" {
    JNIEXPORT jobject JNICALL
    Java_TestLoaderLookupJNI_loaderLookup0(JNIEnv *env, jclass cls) {
        JavaVM* jvm;
        env->GetJavaVM(&jvm);
        Context context;
        context.jvm = jvm;
        run_in_new_thread_and_join(call, &context);
        return context.res;
    }
}