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/*
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* Copyright 2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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# include "incls/_precompiled.incl"
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# include "incls/_jvmtiExtensions.cpp.incl"
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// the list of extension functions
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GrowableArray<jvmtiExtensionFunctionInfo*>* JvmtiExtensions::_ext_functions;
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// the list of extension events
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GrowableArray<jvmtiExtensionEventInfo*>* JvmtiExtensions::_ext_events;
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// extension function
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static jvmtiError JNICALL IsClassUnloadingEnabled(const jvmtiEnv* env, jboolean* enabled, ...) {
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if (enabled == NULL) {
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return JVMTI_ERROR_NULL_POINTER;
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}
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*enabled = (jboolean)ClassUnloading;
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return JVMTI_ERROR_NONE;
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}
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// register extension functions and events. In this implementation we
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// have a single extension function (to prove the API) that tests if class
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// unloading is enabled or disabled. We also have a single extension event
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// EXT_EVENT_CLASS_UNLOAD which is used to provide the JVMDI_EVENT_CLASS_UNLOAD
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// event. The function and the event are registered here.
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//
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void JvmtiExtensions::register_extensions() {
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_ext_functions = new (ResourceObj::C_HEAP) GrowableArray<jvmtiExtensionFunctionInfo*>(1,true);
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_ext_events = new (ResourceObj::C_HEAP) GrowableArray<jvmtiExtensionEventInfo*>(1,true);
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// register our extension function
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static jvmtiParamInfo func_params[] = {
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{ (char*)"IsClassUnloadingEnabled", JVMTI_KIND_OUT, JVMTI_TYPE_JBOOLEAN, JNI_FALSE }
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};
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static jvmtiExtensionFunctionInfo ext_func = {
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(jvmtiExtensionFunction)IsClassUnloadingEnabled,
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(char*)"com.sun.hotspot.functions.IsClassUnloadingEnabled",
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(char*)"Tell if class unloading is enabled (-noclassgc)",
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sizeof(func_params)/sizeof(func_params[0]),
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func_params,
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0, // no non-universal errors
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NULL
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};
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_ext_functions->append(&ext_func);
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// register our extension event
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static jvmtiParamInfo event_params[] = {
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{ (char*)"JNI Environment", JVMTI_KIND_IN, JVMTI_TYPE_JNIENV, JNI_FALSE },
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{ (char*)"Thread", JVMTI_KIND_IN, JVMTI_TYPE_JTHREAD, JNI_FALSE },
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{ (char*)"Class", JVMTI_KIND_IN, JVMTI_TYPE_JCLASS, JNI_FALSE }
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};
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static jvmtiExtensionEventInfo ext_event = {
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EXT_EVENT_CLASS_UNLOAD,
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(char*)"com.sun.hotspot.events.ClassUnload",
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(char*)"CLASS_UNLOAD event",
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sizeof(event_params)/sizeof(event_params[0]),
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event_params
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};
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_ext_events->append(&ext_event);
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}
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// return the list of extension functions
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jvmtiError JvmtiExtensions::get_functions(JvmtiEnv* env,
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jint* extension_count_ptr,
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jvmtiExtensionFunctionInfo** extensions)
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{
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guarantee(_ext_functions != NULL, "registration not done");
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ResourceTracker rt(env);
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jvmtiExtensionFunctionInfo* ext_funcs;
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jvmtiError err = rt.allocate(_ext_functions->length() *
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sizeof(jvmtiExtensionFunctionInfo),
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(unsigned char**)&ext_funcs);
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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for (int i=0; i<_ext_functions->length(); i++ ) {
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ext_funcs[i].func = _ext_functions->at(i)->func;
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char *id = _ext_functions->at(i)->id;
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err = rt.allocate(strlen(id)+1, (unsigned char**)&(ext_funcs[i].id));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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strcpy(ext_funcs[i].id, id);
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char *desc = _ext_functions->at(i)->short_description;
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err = rt.allocate(strlen(desc)+1,
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(unsigned char**)&(ext_funcs[i].short_description));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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strcpy(ext_funcs[i].short_description, desc);
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// params
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jint param_count = _ext_functions->at(i)->param_count;
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ext_funcs[i].param_count = param_count;
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if (param_count == 0) {
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ext_funcs[i].params = NULL;
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} else {
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err = rt.allocate(param_count*sizeof(jvmtiParamInfo),
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(unsigned char**)&(ext_funcs[i].params));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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jvmtiParamInfo* src_params = _ext_functions->at(i)->params;
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jvmtiParamInfo* dst_params = ext_funcs[i].params;
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for (int j=0; j<param_count; j++) {
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err = rt.allocate(strlen(src_params[j].name)+1,
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(unsigned char**)&(dst_params[j].name));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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strcpy(dst_params[j].name, src_params[j].name);
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dst_params[j].kind = src_params[j].kind;
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dst_params[j].base_type = src_params[j].base_type;
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dst_params[j].null_ok = src_params[j].null_ok;
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}
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}
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// errors
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jint error_count = _ext_functions->at(i)->error_count;
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ext_funcs[i].error_count = error_count;
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if (error_count == 0) {
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ext_funcs[i].errors = NULL;
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} else {
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err = rt.allocate(error_count*sizeof(jvmtiError),
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(unsigned char**)&(ext_funcs[i].errors));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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memcpy(ext_funcs[i].errors, _ext_functions->at(i)->errors,
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error_count*sizeof(jvmtiError));
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}
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}
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*extension_count_ptr = _ext_functions->length();
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*extensions = ext_funcs;
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return JVMTI_ERROR_NONE;
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}
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// return the list of extension events
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jvmtiError JvmtiExtensions::get_events(JvmtiEnv* env,
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jint* extension_count_ptr,
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jvmtiExtensionEventInfo** extensions)
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{
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guarantee(_ext_events != NULL, "registration not done");
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ResourceTracker rt(env);
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jvmtiExtensionEventInfo* ext_events;
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jvmtiError err = rt.allocate(_ext_events->length() * sizeof(jvmtiExtensionEventInfo),
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(unsigned char**)&ext_events);
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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for (int i=0; i<_ext_events->length(); i++ ) {
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ext_events[i].extension_event_index = _ext_events->at(i)->extension_event_index;
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char *id = _ext_events->at(i)->id;
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err = rt.allocate(strlen(id)+1, (unsigned char**)&(ext_events[i].id));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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strcpy(ext_events[i].id, id);
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char *desc = _ext_events->at(i)->short_description;
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err = rt.allocate(strlen(desc)+1,
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(unsigned char**)&(ext_events[i].short_description));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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strcpy(ext_events[i].short_description, desc);
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// params
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jint param_count = _ext_events->at(i)->param_count;
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ext_events[i].param_count = param_count;
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if (param_count == 0) {
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ext_events[i].params = NULL;
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} else {
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err = rt.allocate(param_count*sizeof(jvmtiParamInfo),
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(unsigned char**)&(ext_events[i].params));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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jvmtiParamInfo* src_params = _ext_events->at(i)->params;
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jvmtiParamInfo* dst_params = ext_events[i].params;
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for (int j=0; j<param_count; j++) {
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err = rt.allocate(strlen(src_params[j].name)+1,
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(unsigned char**)&(dst_params[j].name));
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if (err != JVMTI_ERROR_NONE) {
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return err;
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}
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strcpy(dst_params[j].name, src_params[j].name);
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dst_params[j].kind = src_params[j].kind;
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dst_params[j].base_type = src_params[j].base_type;
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dst_params[j].null_ok = src_params[j].null_ok;
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}
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}
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}
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*extension_count_ptr = _ext_events->length();
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*extensions = ext_events;
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return JVMTI_ERROR_NONE;
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}
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// set callback for an extension event and enable/disable it.
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jvmtiError JvmtiExtensions::set_event_callback(JvmtiEnv* env,
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jint extension_event_index,
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jvmtiExtensionEvent callback)
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{
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guarantee(_ext_events != NULL, "registration not done");
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jvmtiExtensionEventInfo* event = NULL;
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// if there are extension events registered then validate that the
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// extension_event_index matches one of the registered events.
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if (_ext_events != NULL) {
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for (int i=0; i<_ext_events->length(); i++ ) {
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if (_ext_events->at(i)->extension_event_index == extension_event_index) {
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event = _ext_events->at(i);
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break;
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}
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}
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}
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// invalid event index
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if (event == NULL) {
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return JVMTI_ERROR_ILLEGAL_ARGUMENT;
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}
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JvmtiEventController::set_extension_event_callback(env, extension_event_index,
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callback);
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return JVMTI_ERROR_NONE;
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}
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