jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiExtensions.cpp@710a3c8b516e (annotated)

src/share/vm/prims/jvmtiExtensions.cpp@710a3c8b516e (annotated)

src/share/vm/prims/jvmtiExtensions.cpp

Tue, 08 Aug 2017 15:57:29 +0800

author: aoqi
date: Tue, 08 Aug 2017 15:57:29 +0800
changeset 6876: 710a3c8b516e
parent 4153: b9a9ed0f8eeb
parent 0: f90c822e73f8
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 2003, 2012, 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 "precompiled.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiExtensions.hpp"
 // the list of extension functions
 GrowableArray<jvmtiExtensionFunctionInfo*>* JvmtiExtensions::_ext_functions;
 // the list of extension events
 GrowableArray<jvmtiExtensionEventInfo*>* JvmtiExtensions::_ext_events;
 // extension function
 static jvmtiError JNICALL IsClassUnloadingEnabled(const jvmtiEnv* env, jboolean* enabled, ...) {
   if (enabled == NULL) {
     return JVMTI_ERROR_NULL_POINTER;
   }
   *enabled = (jboolean)ClassUnloading;
   return JVMTI_ERROR_NONE;
 }
 // register extension functions and events. In this implementation we
 // have a single extension function (to prove the API) that tests if class
 // unloading is enabled or disabled. We also have a single extension event
 // EXT_EVENT_CLASS_UNLOAD which is used to provide the JVMDI_EVENT_CLASS_UNLOAD
 // event. The function and the event are registered here.
 //
 void JvmtiExtensions::register_extensions() {
   _ext_functions = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiExtensionFunctionInfo*>(1,true);
   _ext_events = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiExtensionEventInfo*>(1,true);
   // register our extension function
   static jvmtiParamInfo func_params[] = {
     { (char*)"IsClassUnloadingEnabled", JVMTI_KIND_OUT,  JVMTI_TYPE_JBOOLEAN, JNI_FALSE }
   };
   static jvmtiExtensionFunctionInfo ext_func = {
     (jvmtiExtensionFunction)IsClassUnloadingEnabled,
     (char*)"com.sun.hotspot.functions.IsClassUnloadingEnabled",
     (char*)"Tell if class unloading is enabled (-noclassgc)",
     sizeof(func_params)/sizeof(func_params[0]),
     func_params,
 ,              // no non-universal errors
     NULL
   };
   _ext_functions->append(&ext_func);
   // register our extension event
   static jvmtiParamInfo event_params[] = {
     { (char*)"JNI Environment", JVMTI_KIND_IN, JVMTI_TYPE_JNIENV, JNI_FALSE },
     { (char*)"Thread", JVMTI_KIND_IN, JVMTI_TYPE_JTHREAD, JNI_FALSE },
     { (char*)"Class", JVMTI_KIND_IN, JVMTI_TYPE_JCLASS, JNI_FALSE }
   };
   static jvmtiExtensionEventInfo ext_event = {
     EXT_EVENT_CLASS_UNLOAD,
     (char*)"com.sun.hotspot.events.ClassUnload",
     (char*)"CLASS_UNLOAD event",
     sizeof(event_params)/sizeof(event_params[0]),
     event_params
   };
   _ext_events->append(&ext_event);
 }
 // return the list of extension functions
 jvmtiError JvmtiExtensions::get_functions(JvmtiEnv* env,
                                           jint* extension_count_ptr,
                                           jvmtiExtensionFunctionInfo** extensions)
 {
   guarantee(_ext_functions != NULL, "registration not done");
   ResourceTracker rt(env);
   jvmtiExtensionFunctionInfo* ext_funcs;
   jvmtiError err = rt.allocate(_ext_functions->length() *
                                sizeof(jvmtiExtensionFunctionInfo),
                                (unsigned char**)&ext_funcs);
   if (err != JVMTI_ERROR_NONE) {
     return err;
   }
   for (int i=0; i<_ext_functions->length(); i++ ) {
     ext_funcs[i].func = _ext_functions->at(i)->func;
     char *id = _ext_functions->at(i)->id;
     err = rt.allocate(strlen(id)+1, (unsigned char**)&(ext_funcs[i].id));
     if (err != JVMTI_ERROR_NONE) {
       return err;
     }
     strcpy(ext_funcs[i].id, id);
     char *desc = _ext_functions->at(i)->short_description;
     err = rt.allocate(strlen(desc)+1,
                       (unsigned char**)&(ext_funcs[i].short_description));
     if (err != JVMTI_ERROR_NONE) {
       return err;
     }
     strcpy(ext_funcs[i].short_description, desc);
     // params
     jint param_count = _ext_functions->at(i)->param_count;
     ext_funcs[i].param_count = param_count;
     if (param_count == 0) {
       ext_funcs[i].params = NULL;
     } else {
       err = rt.allocate(param_count*sizeof(jvmtiParamInfo),
                         (unsigned char**)&(ext_funcs[i].params));
       if (err != JVMTI_ERROR_NONE) {
         return err;
       }
       jvmtiParamInfo* src_params = _ext_functions->at(i)->params;
       jvmtiParamInfo* dst_params = ext_funcs[i].params;
       for (int j=0; j<param_count; j++) {
         err = rt.allocate(strlen(src_params[j].name)+1,
                           (unsigned char**)&(dst_params[j].name));
         if (err != JVMTI_ERROR_NONE) {
           return err;
         }
         strcpy(dst_params[j].name, src_params[j].name);
         dst_params[j].kind = src_params[j].kind;
         dst_params[j].base_type = src_params[j].base_type;
         dst_params[j].null_ok = src_params[j].null_ok;
       }
     }
     // errors
     jint error_count = _ext_functions->at(i)->error_count;
     ext_funcs[i].error_count = error_count;
     if (error_count == 0) {
       ext_funcs[i].errors = NULL;
     } else {
       err = rt.allocate(error_count*sizeof(jvmtiError),
                         (unsigned char**)&(ext_funcs[i].errors));
       if (err != JVMTI_ERROR_NONE) {
         return err;
       }
       memcpy(ext_funcs[i].errors, _ext_functions->at(i)->errors,
              error_count*sizeof(jvmtiError));
     }
   }
   *extension_count_ptr = _ext_functions->length();
   *extensions = ext_funcs;
   return JVMTI_ERROR_NONE;
 }
 // return the list of extension events
 jvmtiError JvmtiExtensions::get_events(JvmtiEnv* env,
                                        jint* extension_count_ptr,
                                        jvmtiExtensionEventInfo** extensions)
 {
   guarantee(_ext_events != NULL, "registration not done");
   ResourceTracker rt(env);
   jvmtiExtensionEventInfo* ext_events;
   jvmtiError err = rt.allocate(_ext_events->length() * sizeof(jvmtiExtensionEventInfo),
                                (unsigned char**)&ext_events);
   if (err != JVMTI_ERROR_NONE) {
     return err;
   }
   for (int i=0; i<_ext_events->length(); i++ ) {
     ext_events[i].extension_event_index = _ext_events->at(i)->extension_event_index;
     char *id = _ext_events->at(i)->id;
     err = rt.allocate(strlen(id)+1, (unsigned char**)&(ext_events[i].id));
     if (err != JVMTI_ERROR_NONE) {
       return err;
     }
     strcpy(ext_events[i].id, id);
     char *desc = _ext_events->at(i)->short_description;
     err = rt.allocate(strlen(desc)+1,
                       (unsigned char**)&(ext_events[i].short_description));
     if (err != JVMTI_ERROR_NONE) {
       return err;
     }
     strcpy(ext_events[i].short_description, desc);
     // params
     jint param_count = _ext_events->at(i)->param_count;
     ext_events[i].param_count = param_count;
     if (param_count == 0) {
       ext_events[i].params = NULL;
     } else {
       err = rt.allocate(param_count*sizeof(jvmtiParamInfo),
                         (unsigned char**)&(ext_events[i].params));
       if (err != JVMTI_ERROR_NONE) {
         return err;
       }
       jvmtiParamInfo* src_params = _ext_events->at(i)->params;
       jvmtiParamInfo* dst_params = ext_events[i].params;
       for (int j=0; j<param_count; j++) {
         err = rt.allocate(strlen(src_params[j].name)+1,
                           (unsigned char**)&(dst_params[j].name));
         if (err != JVMTI_ERROR_NONE) {
           return err;
         }
         strcpy(dst_params[j].name, src_params[j].name);
         dst_params[j].kind = src_params[j].kind;
         dst_params[j].base_type = src_params[j].base_type;
         dst_params[j].null_ok = src_params[j].null_ok;
       }
     }
   }
   *extension_count_ptr = _ext_events->length();
   *extensions = ext_events;
   return JVMTI_ERROR_NONE;
 }
 // set callback for an extension event and enable/disable it.
 jvmtiError JvmtiExtensions::set_event_callback(JvmtiEnv* env,
                                                jint extension_event_index,
                                                jvmtiExtensionEvent callback)
 {
   guarantee(_ext_events != NULL, "registration not done");
   jvmtiExtensionEventInfo* event = NULL;
   // if there are extension events registered then validate that the
   // extension_event_index matches one of the registered events.
   if (_ext_events != NULL) {
     for (int i=0; i<_ext_events->length(); i++ ) {
       if (_ext_events->at(i)->extension_event_index == extension_event_index) {
          event = _ext_events->at(i);
          break;
       }
     }
   }
   // invalid event index
   if (event == NULL) {
     return JVMTI_ERROR_ILLEGAL_ARGUMENT;
   }
   JvmtiEventController::set_extension_event_callback(env, extension_event_index,
                                                      callback);
   return JVMTI_ERROR_NONE;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/jvmtiExtensions.cpp@710a3c8b516e (annotated)

src/share/vm/prims/jvmtiExtensions.cpp