1 /*
2 * Copyright (c) 2013, 2021, 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 <jni.h>
28 #include "management_ext.h"
29 #include "com_sun_management_internal_DiagnosticCommandImpl.h"
30
Java_com_sun_management_internal_DiagnosticCommandImpl_setNotificationEnabled(JNIEnv * env,jobject dummy,jboolean enabled)31 JNIEXPORT void JNICALL Java_com_sun_management_internal_DiagnosticCommandImpl_setNotificationEnabled
32 (JNIEnv *env, jobject dummy, jboolean enabled) {
33 if (jmm_version <= JMM_VERSION_1_2_2) {
34 JNU_ThrowByName(env, "java/lang/UnsupportedOperationException",
35 "JMX interface to diagnostic framework notifications is not supported by this VM");
36 return;
37 }
38 jmm_interface->SetDiagnosticFrameworkNotificationEnabled(env, enabled);
39 }
40
41 JNIEXPORT jobjectArray JNICALL
Java_com_sun_management_internal_DiagnosticCommandImpl_getDiagnosticCommands(JNIEnv * env,jobject dummy)42 Java_com_sun_management_internal_DiagnosticCommandImpl_getDiagnosticCommands
43 (JNIEnv *env, jobject dummy)
44 {
45 return jmm_interface->GetDiagnosticCommands(env);
46 }
47
48 //
49 // Checks for an exception and if one occurred,
50 // pops 'pops' local frames and frees 'x' before
51 // returning NULL
52 //
53 #define POP_EXCEPTION_CHECK_AND_FREE(pops, x) do { \
54 if ((*env)->ExceptionCheck(env)) { \
55 int i; \
56 for (i = 0; i < pops; i++) { \
57 (*env)->PopLocalFrame(env, NULL); \
58 } \
59 free(x); \
60 return NULL; \
61 } \
62 } while(0)
63
getDiagnosticCommandArgumentInfoArray(JNIEnv * env,jstring command,int num_arg)64 jobject getDiagnosticCommandArgumentInfoArray(JNIEnv *env, jstring command,
65 int num_arg) {
66 int i;
67 jobject obj;
68 jobjectArray result;
69 dcmdArgInfo* dcmd_arg_info_array;
70 jclass dcmdArgInfoCls;
71 jclass arraysCls;
72 jmethodID mid;
73 jobject resultList;
74
75 dcmd_arg_info_array = (dcmdArgInfo*) malloc(num_arg * sizeof(dcmdArgInfo));
76 /* According to ISO C it is perfectly legal for malloc to return zero if called with a zero argument */
77 if (dcmd_arg_info_array == NULL && num_arg != 0) {
78 JNU_ThrowOutOfMemoryError(env, 0);
79 return NULL;
80 }
81 jmm_interface->GetDiagnosticCommandArgumentsInfo(env, command,
82 dcmd_arg_info_array);
83 dcmdArgInfoCls = (*env)->FindClass(env,
84 "com/sun/management/internal/DiagnosticCommandArgumentInfo");
85 POP_EXCEPTION_CHECK_AND_FREE(0, dcmd_arg_info_array);
86
87 result = (*env)->NewObjectArray(env, num_arg, dcmdArgInfoCls, NULL);
88 if (result == NULL) {
89 free(dcmd_arg_info_array);
90 return NULL;
91 }
92 for (i=0; i<num_arg; i++) {
93 // Capacity for 5 local refs: jname, jdesc, jtype, jdefStr and obj
94 (*env)->PushLocalFrame(env, 5);
95 jstring jname, jdesc, jtype, jdefStr;
96
97 jname = (*env)->NewStringUTF(env,dcmd_arg_info_array[i].name);
98 POP_EXCEPTION_CHECK_AND_FREE(1, dcmd_arg_info_array);
99
100 jdesc = (*env)->NewStringUTF(env,dcmd_arg_info_array[i].description);
101 POP_EXCEPTION_CHECK_AND_FREE(1, dcmd_arg_info_array);
102
103 jtype = (*env)->NewStringUTF(env,dcmd_arg_info_array[i].type);
104 POP_EXCEPTION_CHECK_AND_FREE(1, dcmd_arg_info_array);
105
106 jdefStr = (*env)->NewStringUTF(env, dcmd_arg_info_array[i].default_string);
107 POP_EXCEPTION_CHECK_AND_FREE(1, dcmd_arg_info_array);
108 obj = JNU_NewObjectByName(env,
109 "com/sun/management/internal/DiagnosticCommandArgumentInfo",
110 "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;ZZZI)V",
111 jname, jdesc, jtype,
112 dcmd_arg_info_array[i].default_string == NULL ? NULL: jdefStr,
113 dcmd_arg_info_array[i].mandatory,
114 dcmd_arg_info_array[i].option,
115 dcmd_arg_info_array[i].multiple,
116 dcmd_arg_info_array[i].position);
117 if (obj == NULL) {
118 (*env)->PopLocalFrame(env, NULL);
119 free(dcmd_arg_info_array);
120 return NULL;
121 }
122 obj = (*env)->PopLocalFrame(env, obj);
123 (*env)->SetObjectArrayElement(env, result, i, obj);
124 POP_EXCEPTION_CHECK_AND_FREE(0, dcmd_arg_info_array);
125 }
126 free(dcmd_arg_info_array);
127 arraysCls = (*env)->FindClass(env, "java/util/Arrays");
128 if ((*env)->ExceptionCheck(env)) {
129 return NULL;
130 }
131 mid = (*env)->GetStaticMethodID(env, arraysCls,
132 "asList", "([Ljava/lang/Object;)Ljava/util/List;");
133 resultList = (*env)->CallStaticObjectMethod(env, arraysCls, mid, result);
134 if ((*env)->ExceptionCheck(env)) {
135 // Make sure we return NULL in case of OOM inside Java
136 return NULL;
137 }
138 return resultList;
139 }
140
141 /* Throws IllegalArgumentException if at least one of the diagnostic command
142 * passed in argument is not supported by the JVM
143 */
144 JNIEXPORT jobjectArray JNICALL
Java_com_sun_management_internal_DiagnosticCommandImpl_getDiagnosticCommandInfo(JNIEnv * env,jobject dummy,jobjectArray commands)145 Java_com_sun_management_internal_DiagnosticCommandImpl_getDiagnosticCommandInfo
146 (JNIEnv *env, jobject dummy, jobjectArray commands)
147 {
148 int i;
149 jclass dcmdInfoCls;
150 jobject result;
151 jobjectArray args;
152 jobject obj;
153 jmmOptionalSupport mos;
154 jint ret = jmm_interface->GetOptionalSupport(env, &mos);
155 jsize num_commands;
156 dcmdInfo* dcmd_info_array;
157 jstring jname, jdesc, jimpact, cmd;
158
159 if (commands == NULL) {
160 JNU_ThrowNullPointerException(env, "Invalid String Array");
161 return NULL;
162 }
163 num_commands = (*env)->GetArrayLength(env, commands);
164 // Ensure capacity for 2 + num_commands local refs:
165 // 2 => dcmdInfoCls, result
166 // num_commmands => one obj per command
167 (*env)->PushLocalFrame(env, 2 + num_commands);
168 dcmdInfoCls = (*env)->FindClass(env,
169 "com/sun/management/internal/DiagnosticCommandInfo");
170 if ((*env)->ExceptionCheck(env)) {
171 (*env)->PopLocalFrame(env, NULL);
172 return NULL;
173 }
174
175 result = (*env)->NewObjectArray(env, num_commands, dcmdInfoCls, NULL);
176 if (result == NULL) {
177 (*env)->PopLocalFrame(env, NULL);
178 return NULL;
179 }
180 if (num_commands == 0) {
181 result = (*env)->PopLocalFrame(env, result);
182 /* Handle the 'zero commands' case specially to avoid calling 'malloc()' */
183 /* with a zero argument because that may legally return a NULL pointer. */
184 return result;
185 }
186 dcmd_info_array = (dcmdInfo*) malloc(num_commands * sizeof(dcmdInfo));
187 if (dcmd_info_array == NULL) {
188 (*env)->PopLocalFrame(env, NULL);
189 JNU_ThrowOutOfMemoryError(env, NULL);
190 return NULL;
191 }
192 jmm_interface->GetDiagnosticCommandInfo(env, commands, dcmd_info_array);
193 for (i=0; i<num_commands; i++) {
194 // Ensure capacity for 6 + 3 local refs:
195 // 6 => jname, jdesc, jimpact, cmd, args, obj
196 // 3 => permission class, name, action
197 (*env)->PushLocalFrame(env, 6 + 3);
198
199 cmd = (*env)->GetObjectArrayElement(env, commands, i);
200 args = getDiagnosticCommandArgumentInfoArray(env,
201 cmd,
202 dcmd_info_array[i].num_arguments);
203 if (args == NULL) {
204 (*env)->PopLocalFrame(env, NULL);
205 (*env)->PopLocalFrame(env, NULL);
206 free(dcmd_info_array);
207 return NULL;
208 }
209
210 jname = (*env)->NewStringUTF(env,dcmd_info_array[i].name);
211 POP_EXCEPTION_CHECK_AND_FREE(2, dcmd_info_array);
212
213 jdesc = (*env)->NewStringUTF(env,dcmd_info_array[i].description);
214 POP_EXCEPTION_CHECK_AND_FREE(2, dcmd_info_array);
215
216 jimpact = (*env)->NewStringUTF(env,dcmd_info_array[i].impact);
217 POP_EXCEPTION_CHECK_AND_FREE(2, dcmd_info_array);
218
219 obj = JNU_NewObjectByName(env,
220 "com/sun/management/internal/DiagnosticCommandInfo",
221 "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;ZLjava/util/List;)V",
222 jname, jdesc, jimpact,
223 dcmd_info_array[i].permission_class==NULL?NULL:(*env)->NewStringUTF(env,dcmd_info_array[i].permission_class),
224 dcmd_info_array[i].permission_name==NULL?NULL:(*env)->NewStringUTF(env,dcmd_info_array[i].permission_name),
225 dcmd_info_array[i].permission_action==NULL?NULL:(*env)->NewStringUTF(env,dcmd_info_array[i].permission_action),
226 dcmd_info_array[i].enabled,
227 args);
228 if (obj == NULL) {
229 (*env)->PopLocalFrame(env, NULL);
230 (*env)->PopLocalFrame(env, NULL);
231 free(dcmd_info_array);
232 return NULL;
233 }
234 obj = (*env)->PopLocalFrame(env, obj);
235
236 (*env)->SetObjectArrayElement(env, result, i, obj);
237 POP_EXCEPTION_CHECK_AND_FREE(1, dcmd_info_array);
238 }
239 result = (*env)->PopLocalFrame(env, result);
240 free(dcmd_info_array);
241 return result;
242 }
243
244 /* Throws IllegalArgumentException if the diagnostic command
245 * passed in argument is not supported by the JVM
246 */
247 JNIEXPORT jstring JNICALL
Java_com_sun_management_internal_DiagnosticCommandImpl_executeDiagnosticCommand(JNIEnv * env,jobject dummy,jstring command)248 Java_com_sun_management_internal_DiagnosticCommandImpl_executeDiagnosticCommand
249 (JNIEnv *env, jobject dummy, jstring command) {
250 return jmm_interface->ExecuteDiagnosticCommand(env, command);
251 }
252