1/*
2 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#include <stdlib.h>
27#include <stdio.h>
28#include <string.h>
29#include <jni.h>
30#include "management_ext.h"
31#include "com_sun_management_internal_Flag.h"
32
33static jobject default_origin = NULL;
34static jobject vm_creation_origin = NULL;
35static jobject mgmt_origin = NULL;
36static jobject envvar_origin = NULL;
37static jobject config_file_origin = NULL;
38static jobject ergo_origin = NULL;
39static jobject attach_origin = NULL;
40static jobject other_origin = NULL;
41
42JNIEXPORT jint JNICALL
43Java_com_sun_management_internal_Flag_getInternalFlagCount
44 (JNIEnv *env, jclass cls)
45{
46 jlong count = jmm_interface->GetLongAttribute(env, NULL,
47 JMM_VM_GLOBAL_COUNT);
48 return (jint) count;
49}
50
51JNIEXPORT jobjectArray JNICALL
52 Java_com_sun_management_internal_Flag_getAllFlagNames
53(JNIEnv *env, jclass cls)
54{
55 return jmm_interface->GetVMGlobalNames(env);
56}
57
58static jobject find_origin_constant(JNIEnv* env, const char* enum_name) {
59 jvalue field;
60 field = JNU_GetStaticFieldByName(env,
61 NULL,
62 "com/sun/management/VMOption$Origin",
63 enum_name,
64 "Lcom/sun/management/VMOption$Origin;");
65 return (*env)->NewGlobalRef(env, field.l);
66}
67
68JNIEXPORT void JNICALL
69Java_com_sun_management_internal_Flag_initialize
70 (JNIEnv *env, jclass cls)
71{
72 default_origin = find_origin_constant(env, "DEFAULT");
73 vm_creation_origin = find_origin_constant(env, "VM_CREATION");
74 mgmt_origin = find_origin_constant(env, "MANAGEMENT");
75 envvar_origin = find_origin_constant(env, "ENVIRON_VAR");
76 config_file_origin = find_origin_constant(env, "CONFIG_FILE");
77 ergo_origin = find_origin_constant(env, "ERGONOMIC");
78 attach_origin = find_origin_constant(env, "ATTACH_ON_DEMAND");
79 other_origin = find_origin_constant(env, "OTHER");
80}
81
82JNIEXPORT jint JNICALL
83Java_com_sun_management_internal_Flag_getFlags
84 (JNIEnv *env, jclass cls, jobjectArray names, jobjectArray flags, jint count)
85{
86 jint num_flags, i, index;
87 jmmVMGlobal* globals;
88 size_t gsize;
89 const char* class_name = "com/sun/management/internal/Flag";
90 const char* signature = "(Ljava/lang/String;Ljava/lang/Object;ZZLcom/sun/management/VMOption$Origin;)V";
91 jobject origin;
92 jobject valueObj;
93 jobject flag;
94
95 if (flags == NULL) {
96 JNU_ThrowNullPointerException(env, 0);
97 return 0;
98 }
99
100 if (count <= 0) {
101 JNU_ThrowIllegalArgumentException(env, 0);
102 return 0;
103 }
104
105 gsize = (size_t)count * sizeof(jmmVMGlobal);
106 globals = (jmmVMGlobal*) malloc(gsize);
107 if (globals == NULL) {
108 JNU_ThrowOutOfMemoryError(env, 0);
109 return 0;
110 }
111
112 memset(globals, 0, gsize);
113 num_flags = jmm_interface->GetVMGlobals(env, names, globals, count);
114 if (num_flags == 0) {
115 free(globals);
116 return 0;
117 }
118
119 index = 0;
120 for (i = 0; i < count; i++) {
121 if (globals[i].name == NULL) {
122 continue;
123 }
124 switch (globals[i].type) {
125 case JMM_VMGLOBAL_TYPE_JBOOLEAN:
126 valueObj = JNU_NewObjectByName(env, "java/lang/Boolean", "(Z)V",
127 globals[i].value.z);
128 break;
129 case JMM_VMGLOBAL_TYPE_JSTRING:
130 valueObj = globals[i].value.l;
131 break;
132 case JMM_VMGLOBAL_TYPE_JLONG:
133 valueObj = JNU_NewObjectByName(env, "java/lang/Long", "(J)V",
134 globals[i].value.j);
135 break;
136 case JMM_VMGLOBAL_TYPE_JDOUBLE:
137 valueObj = JNU_NewObjectByName(env, "java/lang/Double", "(D)V",
138 globals[i].value.d);
139 break;
140 default:
141 // ignore unsupported type
142 continue;
143 }
144
145 if (valueObj == NULL && globals[i].type != JMM_VMGLOBAL_TYPE_JSTRING) {
146 free(globals);
147 JNU_ThrowOutOfMemoryError(env, 0);
148 return 0;
149 }
150
151 switch (globals[i].origin) {
152 case JMM_VMGLOBAL_ORIGIN_DEFAULT:
153 origin = default_origin;
154 break;
155 case JMM_VMGLOBAL_ORIGIN_COMMAND_LINE:
156 origin = vm_creation_origin;
157 break;
158 case JMM_VMGLOBAL_ORIGIN_MANAGEMENT:
159 origin = mgmt_origin;
160 break;
161 case JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR:
162 origin = envvar_origin;
163 break;
164 case JMM_VMGLOBAL_ORIGIN_CONFIG_FILE:
165 origin = config_file_origin;
166 break;
167 case JMM_VMGLOBAL_ORIGIN_ERGONOMIC:
168 origin = ergo_origin;
169 break;
170 case JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND:
171 origin = attach_origin;
172 break;
173 case JMM_VMGLOBAL_ORIGIN_OTHER:
174 origin = other_origin;
175 break;
176 default:
177 // unknown origin
178 origin = other_origin;
179 break;
180 }
181 flag = JNU_NewObjectByName(env, class_name, signature, globals[i].name,
182 valueObj, globals[i].writeable,
183 globals[i].external, origin);
184 if (flag == NULL) {
185 free(globals);
186 JNU_ThrowOutOfMemoryError(env, 0);
187 return 0;
188 }
189 (*env)->SetObjectArrayElement(env, flags, index, flag);
190 index++;
191 }
192
193 if (index != num_flags) {
194 JNU_ThrowInternalError(env, "Number of Flag objects created unmatched");
195 free(globals);
196 return 0;
197 }
198
199 free(globals);
200
201 /* return the number of Flag objects created */
202 return num_flags;
203}
204
205JNIEXPORT void JNICALL
206Java_com_sun_management_internal_Flag_setLongValue
207 (JNIEnv *env, jclass cls, jstring name, jlong value)
208{
209 jvalue v;
210 v.j = value;
211
212 jmm_interface->SetVMGlobal(env, name, v);
213}
214
215JNIEXPORT void JNICALL
216Java_com_sun_management_internal_Flag_setDoubleValue
217 (JNIEnv *env, jclass cls, jstring name, jdouble value)
218{
219 jvalue v;
220 v.d = value;
221
222 jmm_interface->SetVMGlobal(env, name, v);
223}
224
225JNIEXPORT void JNICALL
226Java_com_sun_management_internal_Flag_setBooleanValue
227 (JNIEnv *env, jclass cls, jstring name, jboolean value)
228{
229 jvalue v;
230 v.z = value;
231
232 jmm_interface->SetVMGlobal(env, name, v);
233}
234
235JNIEXPORT void JNICALL
236Java_com_sun_management_internal_Flag_setStringValue
237 (JNIEnv *env, jclass cls, jstring name, jstring value)
238{
239 jvalue v;
240 v.l = value;
241
242 jmm_interface->SetVMGlobal(env, name, v);
243}
244