0N/A/*
2362N/A * Copyright (c) 2004, 2005, Oracle and/or its affiliates. All rights reserved.
0N/A *
0N/A * Redistribution and use in source and binary forms, with or without
0N/A * modification, are permitted provided that the following conditions
0N/A * are met:
0N/A *
0N/A * - Redistributions of source code must retain the above copyright
0N/A * notice, this list of conditions and the following disclaimer.
0N/A *
0N/A * - Redistributions in binary form must reproduce the above copyright
0N/A * notice, this list of conditions and the following disclaimer in the
0N/A * documentation and/or other materials provided with the distribution.
0N/A *
2362N/A * - Neither the name of Oracle nor the names of its
0N/A * contributors may be used to endorse or promote products derived
0N/A * from this software without specific prior written permission.
0N/A *
0N/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
0N/A * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
0N/A * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
0N/A * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
0N/A * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
0N/A * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
0N/A * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
0N/A * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
0N/A * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
0N/A * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
0N/A * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0N/A */
0N/A
4378N/A/*
4378N/A * This source code is provided to illustrate the usage of a given feature
4378N/A * or technique and has been deliberately simplified. Additional steps
4378N/A * required for a production-quality application, such as security checks,
4378N/A * input validation and proper error handling, might not be present in
4378N/A * this sample code.
4378N/A */
4378N/A
4378N/A
0N/A#include <stdio.h>
0N/A#include <stdlib.h>
0N/A#include <string.h>
0N/A
0N/A#include "jni.h"
0N/A#include "jvmti.h"
0N/A
0N/A#include "agent_util.h"
0N/A
0N/A/* Create major.minor.micro version string */
0N/Astatic void
0N/Aversion_check(jint cver, jint rver)
0N/A{
0N/A jint cmajor, cminor, cmicro;
0N/A jint rmajor, rminor, rmicro;
0N/A
0N/A cmajor = (cver & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
0N/A cminor = (cver & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
0N/A cmicro = (cver & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
0N/A rmajor = (rver & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
0N/A rminor = (rver & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
0N/A rmicro = (rver & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
0N/A stdout_message("Compile Time JVMTI Version: %d.%d.%d (0x%08x)\n",
0N/A cmajor, cminor, cmicro, cver);
0N/A stdout_message("Run Time JVMTI Version: %d.%d.%d (0x%08x)\n",
0N/A rmajor, rminor, rmicro, rver);
0N/A if ( (cmajor > rmajor) || (cmajor == rmajor && cminor > rminor) ) {
0N/A fatal_error(
0N/A "ERROR: Compile Time JVMTI and Run Time JVMTI are incompatible\n");
0N/A }
0N/A}
0N/A
0N/A/* Callback for JVMTI_EVENT_VM_INIT */
0N/Astatic void JNICALL
0N/Avm_init(jvmtiEnv *jvmti, JNIEnv *env, jthread thread)
0N/A{
0N/A jvmtiError err;
0N/A jint runtime_version;
0N/A
0N/A /* The exact JVMTI version doesn't have to match, however this
0N/A * code demonstrates how you can check that the JVMTI version seen
0N/A * in the jvmti.h include file matches that being supplied at runtime
0N/A * by the VM.
0N/A */
0N/A err = (*jvmti)->GetVersionNumber(jvmti, &runtime_version);
0N/A check_jvmti_error(jvmti, err, "get version number");
0N/A version_check(JVMTI_VERSION, runtime_version);
0N/A}
0N/A
0N/A/* Agent_OnLoad() is called first, we prepare for a VM_INIT event here. */
0N/AJNIEXPORT jint JNICALL
0N/AAgent_OnLoad(JavaVM *vm, char *options, void *reserved)
0N/A{
0N/A jint rc;
0N/A jvmtiError err;
0N/A jvmtiEventCallbacks callbacks;
0N/A jvmtiEnv *jvmti;
0N/A
0N/A /* Get JVMTI environment */
0N/A rc = (*vm)->GetEnv(vm, (void **)&jvmti, JVMTI_VERSION);
0N/A if (rc != JNI_OK) {
0N/A fatal_error("ERROR: Unable to create jvmtiEnv, GetEnv failed, error=%d\n", rc);
0N/A return -1;
0N/A }
0N/A
0N/A /* Set callbacks and enable event notifications */
0N/A memset(&callbacks, 0, sizeof(callbacks));
0N/A callbacks.VMInit = &vm_init;
0N/A err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks));
0N/A check_jvmti_error(jvmti, err, "set event callbacks");
0N/A err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE,
0N/A JVMTI_EVENT_VM_INIT, NULL);
0N/A check_jvmti_error(jvmti, err, "set event notify");
0N/A return 0;
0N/A}
0N/A
0N/A/* Agent_OnUnload() is called last */
0N/AJNIEXPORT void JNICALL
0N/AAgent_OnUnload(JavaVM *vm)
0N/A{
0N/A}