154 lines
4.4 KiB
C++
154 lines
4.4 KiB
C++
/*
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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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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <jvmti.h>
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#include "agent_common.h"
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#include <jvmti_tools.h>
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#include "JVMTITools.h"
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extern "C" {
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/* ============================================================================= */
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static int loaded_classes_num = 0;
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/* ============================================================================= */
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static void JNICALL
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ClassFileLoadHook (
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jvmtiEnv *jvmti
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, JNIEnv *jni
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, jclass class_being_redefined
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, jobject loader
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, const char* name
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, jobject protection_domain
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, jint class_data_len
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, const unsigned char* class_data
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, jint *new_class_data_len
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, unsigned char** new_class_data
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)
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{
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loaded_classes_num++;
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NSK_DISPLAY2("ClassFileLoadHook: class \"%s\", loader %X\n"
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, name
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, loader
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);
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}
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/* ============================================================================= */
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JNIEXPORT jint JNICALL
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Java_nsk_jvmti_GetEnv_GetEnv001_GetEnv001_getLoadedClassesCount(JNIEnv *env, jobject owner) {
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return loaded_classes_num;
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}
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/* ============================================================================= */
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/* Agent initialization procedure */
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_GetEnv001(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNICALL Agent_OnAttach_GetEnv001(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNI_OnLoad_GetEnv001(JavaVM *jvm, char *options, void *reserved) {
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return JNI_VERSION_1_8;
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}
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#endif
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jint Agent_Initialize(JavaVM *vm, char *options, void *reserved)
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{
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jvmtiEventCallbacks callbacks;
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jvmtiCapabilities caps;
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jvmtiEnv* jvmti;
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if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) {
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return JNI_ERR;
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}
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if (NSK_CPP_STUB3(
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GetEnv
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, vm
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, (void **) &jvmti
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, JVMTI_VERSION_1_1
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) != JNI_OK || jvmti == NULL)
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{
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NSK_COMPLAIN0("JVMTI_VERSION_1_1 isn't supported.");
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return JNI_OK;
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}
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if (!NSK_JVMTI_VERIFY(
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NSK_CPP_STUB2(
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GetCapabilities
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, jvmti
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, &caps)
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)
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)
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return JNI_ERR;
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caps.can_retransform_classes = 1;
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// Register all necessary JVM capabilities
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if (!NSK_JVMTI_VERIFY(
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NSK_CPP_STUB2(
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AddCapabilities
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, jvmti
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, &caps)
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)
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)
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return JNI_ERR;
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// Register all necessary event callbacks
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memset(&callbacks, 0, sizeof(callbacks));
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callbacks.ClassFileLoadHook = &ClassFileLoadHook;
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if (!NSK_JVMTI_VERIFY(
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NSK_CPP_STUB3(
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SetEventCallbacks
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, jvmti
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, &callbacks
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, sizeof(callbacks)
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)
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)
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)
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return JNI_ERR;
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// Enable class retransformation
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if (!NSK_JVMTI_VERIFY(
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NSK_CPP_STUB4(
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SetEventNotificationMode
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, jvmti
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, JVMTI_ENABLE
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, JVMTI_EVENT_CLASS_FILE_LOAD_HOOK
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, NULL
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)
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)
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)
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return JNI_ERR;
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return JNI_OK;
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}
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}
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