| /* |
| * Copyright (c) 2004, 2015, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * This source code is provided to illustrate the usage of a given feature |
| * or technique and has been deliberately simplified. Additional steps |
| * required for a production-quality application, such as security checks, |
| * input validation and proper error handling, might not be present in |
| * this sample code. |
| */ |
| |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "jni.h" |
| #include "jvmti.h" |
| |
| #include "agent_util.h" |
| |
| /* Create major.minor.micro version string */ |
| static void |
| version_check(jint cver, jint rver) |
| { |
| jint cmajor, cminor, cmicro; |
| jint rmajor, rminor, rmicro; |
| |
| cmajor = (cver & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; |
| cminor = (cver & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; |
| cmicro = (cver & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; |
| rmajor = (rver & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; |
| rminor = (rver & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; |
| rmicro = (rver & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; |
| stdout_message("Compile Time JVMTI Version: %d.%d.%d (0x%08x)\n", |
| cmajor, cminor, cmicro, cver); |
| stdout_message("Run Time JVMTI Version: %d.%d.%d (0x%08x)\n", |
| rmajor, rminor, rmicro, rver); |
| if ( (cmajor > rmajor) || (cmajor == rmajor && cminor > rminor) ) { |
| fatal_error( |
| "ERROR: Compile Time JVMTI and Run Time JVMTI are incompatible\n"); |
| } |
| } |
| |
| /* Callback for JVMTI_EVENT_VM_INIT */ |
| static void JNICALL |
| vm_init(jvmtiEnv *jvmti, JNIEnv *env, jthread thread) |
| { |
| jvmtiError err; |
| jint runtime_version; |
| |
| /* The exact JVMTI version doesn't have to match, however this |
| * code demonstrates how you can check that the JVMTI version seen |
| * in the jvmti.h include file matches that being supplied at runtime |
| * by the VM. |
| */ |
| err = (*jvmti)->GetVersionNumber(jvmti, &runtime_version); |
| check_jvmti_error(jvmti, err, "get version number"); |
| version_check(JVMTI_VERSION, runtime_version); |
| } |
| |
| /* Agent_OnLoad() is called first, we prepare for a VM_INIT event here. */ |
| JNIEXPORT jint JNICALL |
| DEF_Agent_OnLoad(JavaVM *vm, char *options, void *reserved) |
| { |
| jint rc; |
| jvmtiError err; |
| jvmtiEventCallbacks callbacks; |
| jvmtiEnv *jvmti; |
| |
| /* Get JVMTI environment */ |
| rc = (*vm)->GetEnv(vm, (void **)&jvmti, JVMTI_VERSION); |
| if (rc != JNI_OK) { |
| fatal_error("ERROR: Unable to create jvmtiEnv, GetEnv failed, error=%d\n", rc); |
| return -1; |
| } |
| |
| /* Set callbacks and enable event notifications */ |
| memset(&callbacks, 0, sizeof(callbacks)); |
| callbacks.VMInit = &vm_init; |
| err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks)); |
| check_jvmti_error(jvmti, err, "set event callbacks"); |
| err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_VM_INIT, NULL); |
| check_jvmti_error(jvmti, err, "set event notify"); |
| return 0; |
| } |
| |
| /* Agent_OnUnload() is called last */ |
| JNIEXPORT void JNICALL |
| DEF_Agent_OnUnload(JavaVM *vm) |
| { |
| } |