dyncodgen001.cpp

/*
 * Copyright (c) 2003, 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.
 */

#include <string.h>
#include "jvmti.h"
#include "agent_common.h"
#include "jni_tools.h"
#include "jvmti_tools.h"

extern "C" {

/* ========================================================================== */

/* scaffold objects */
static jlong timeout = 0;

/* test objects */
static int eventsCount;

/* ========================================================================== */

/* check if any DynamicCodeGenerated events received */
static int checkDynamicCodeGeneratedEvents() {

    NSK_DISPLAY1("DynamicCodeGenerated events received: %d\n", eventsCount);

    if (eventsCount == 0) {
        NSK_DISPLAY0("# WARNING: no DynamicCodeGenerated events\n");
        NSK_DISPLAY0("#    (dynamic code may not be generated at all)\n");
    }

    return NSK_TRUE;
}

/* ========================================================================== */

JNIEXPORT void JNICALL
DynamicCodeGenerated(jvmtiEnv* jvmti,
        const char* name, const void* address, jint length) {

    NSK_DISPLAY3("DynamicCodeGenerated: \"%s\", address=0x%p, length=%d\n",
        name, address, length);

    eventsCount++;
}

/* ========================================================================== */

/* agent algorithm */
static void JNICALL
agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {

    /* wait for debuggee start */
    if (!nsk_jvmti_waitForSync(timeout))
        return;

    /* testcase #1: check if any DynamicCodeGenerated events received*/
    NSK_DISPLAY0("Testcase #1: check if any DynamicCodeGenerated events received\n");
    if (!checkDynamicCodeGeneratedEvents())
        nsk_jvmti_setFailStatus();

    /* resume debugee after last sync */
    if (!nsk_jvmti_resumeSync())
        return;
}

/* ========================================================================== */

/* agent library initialization */
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_dyncodgen001(JavaVM *jvm, char *options, void *reserved) {
    return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_dyncodgen001(JavaVM *jvm, char *options, void *reserved) {
    return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_dyncodgen001(JavaVM *jvm, char *options, void *reserved) {
    return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
    jvmtiEnv* jvmti = NULL;
    jvmtiEventCallbacks callbacks;

    /* init framework and parse options */
    if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
        return JNI_ERR;

    timeout = nsk_jvmti_getWaitTime() * 60000;
    NSK_DISPLAY1("Timeout: %d msc\n", (int)timeout);

    /* create JVMTI environment */
    if (!NSK_VERIFY((jvmti =
            nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
        return JNI_ERR;

    memset(&callbacks, 0, sizeof(callbacks));
    callbacks.DynamicCodeGenerated = &DynamicCodeGenerated;
    if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks))))
        return JNI_ERR;

    /* enable DynamicCodeGenerated event */
    if (!NSK_JVMTI_VERIFY(
            jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_DYNAMIC_CODE_GENERATED, NULL)))
        return JNI_ERR;

    /* register agent proc and arg */
    if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
        return JNI_ERR;

    return JNI_OK;
}

/* ========================================================================== */

}