1 /*
2 * Copyright (c) 2004, 2018, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include <string.h>
25 #include "jvmti.h"
26 #include "agent_common.h"
27 #include "jni_tools.h"
28 #include "jvmti_tools.h"
29 #include "JVMTITools.h"
30
31 extern "C" {
32
33 /* ============================================================================= */
34
35 /* scaffold objects */
36 static JNIEnv* jni = NULL;
37 static jvmtiEnv *jvmti = NULL;
38 static jlong timeout = 0;
39 static jrawMonitorID syncLock = NULL;
40
41 /* constant names */
42 #define JVMTI_EVENT_COUNT (int)(JVMTI_MAX_EVENT_TYPE_VAL - JVMTI_MIN_EVENT_TYPE_VAL + 1)
43 #define EXPECTED_CLASS_NAME "nsk.jvmti.scenarios.events.EM06.em06t001a"
44 #define CLASS_LOADER_COUNT_PARAM "classLoaderCount"
45
46 static int classLoaderCount = 0;
47 static int classloadEventCount = 0;
48 static int classprepareEventCount = 0;
49
50 /* ============================================================================= */
51
52 /* callbacks */
53
54 void
55 handler(jvmtiEvent event, jvmtiEnv* jvmti, JNIEnv* jni_env,
56 jthread thread, jclass klass) {
57
58 jmethodID methodID;
59 jclass classObject;
60 jstring jclassName;
61 const char *className;
62
63 if (!NSK_JNI_VERIFY(jni_env, (classObject =
64 NSK_CPP_STUB2(GetObjectClass, jni_env, klass)) != NULL)) {
65 nsk_jvmti_setFailStatus();
66 return;
67 }
68
69 if (!NSK_JNI_VERIFY(jni_env, (methodID =
70 NSK_CPP_STUB4(GetMethodID, jni_env, classObject,
71 "getName", "()Ljava/lang/String;")) != NULL)) {
72 nsk_jvmti_setFailStatus();
73 return;
74 }
75
76 jclassName = (jstring) NSK_CPP_STUB3(CallObjectMethod, jni_env, klass, methodID);
77
78 className = NSK_CPP_STUB3(GetStringUTFChars, jni_env, jclassName, 0);
79
80 if ( className != NULL && (strcmp(className, EXPECTED_CLASS_NAME)==0) ) {
81
82 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorEnter, jvmti, syncLock)))
83 nsk_jvmti_setFailStatus();
84
85 switch (event) {
86 case JVMTI_EVENT_CLASS_LOAD:
87 classloadEventCount++; break;
88 case JVMTI_EVENT_CLASS_PREPARE:
89 classprepareEventCount++; break;
90 default:
91 NSK_COMPLAIN1("Unexpected event %s", TranslateEvent(event));
92 nsk_jvmti_setFailStatus();
93 }
94
95 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, syncLock)))
96 nsk_jvmti_setFailStatus();
97
98 }
99
100 NSK_CPP_STUB3(ReleaseStringUTFChars, jni_env, jclassName, className);
101 }
102
103 JNIEXPORT void JNICALL
104 cbClassLoad(jvmtiEnv* jvmti, JNIEnv* jni_env, jthread thread, jclass klass) {
105
106 handler(JVMTI_EVENT_CLASS_LOAD, jvmti, jni_env, thread, klass);
107 }
108
109 JNIEXPORT void JNICALL
110 cbClassPrepare(jvmtiEnv* jvmti, JNIEnv* jni_env, jthread thread, jclass klass) {
111
112 handler(JVMTI_EVENT_CLASS_PREPARE, jvmti, jni_env, thread, klass);
113 }
114
115 /* ============================================================================= */
116
117 static int
118 enableEvent(jvmtiEventMode enable, jvmtiEvent event) {
119 if (!NSK_JVMTI_VERIFY(
120 NSK_CPP_STUB4(SetEventNotificationMode, jvmti, enable,
121 event, NULL))) {
122 nsk_jvmti_setFailStatus();
123 return NSK_FALSE;
124 }
125
126 return NSK_TRUE;
127 }
128
129 /* ============================================================================= */
130
131 /**
132 * Testcase: check tested events.
133 * - check if expected events received for each method
134 *
135 * Returns NSK_TRUE if test may continue; or NSK_FALSE for test break.
136 */
137 int checkEvents() {
138
139 int result = NSK_TRUE;
140
141 if (classloadEventCount == classLoaderCount) {
142 NSK_DISPLAY1("Expected number of JVMTI_EVENT_CLASS_LOAD events %d\n",
143 classloadEventCount);
144 } else {
145 NSK_COMPLAIN2("Unexpected number of JVMTI_EVENT_CLASS_LOAD events %d\n\texpected value %d\n",
146 classloadEventCount,
147 classLoaderCount);
148 result = NSK_FALSE;
149 }
150
151 if (classprepareEventCount == classLoaderCount) {
152 NSK_DISPLAY1("Expected number of JVMTI_EVENT_CLASS_PREPARE events %d\n",
153 classloadEventCount);
154 } else {
155 NSK_COMPLAIN2("Unexpected number of JVMTI_EVENT_CLASS_PREPARE events %d\n\texpected value %d\n",
156 classprepareEventCount,
157 classLoaderCount);
158 result = NSK_FALSE;
159 }
160
161 return result;
162 }
163
164 /* ============================================================================= */
165
166 static int
167 setCallBacks() {
168 jvmtiEventCallbacks eventCallbacks;
169 memset(&eventCallbacks, 0, sizeof(eventCallbacks));
170
171 eventCallbacks.ClassLoad = cbClassLoad;
172 eventCallbacks.ClassPrepare = cbClassPrepare;
173
174 if (!NSK_JVMTI_VERIFY(
175 NSK_CPP_STUB3(SetEventCallbacks, jvmti,
176 &eventCallbacks,
177 sizeof(eventCallbacks))))
178 return NSK_FALSE;
179
180 return NSK_TRUE;
181 }
182
183 /* ============================================================================= */
184
185 /** Agent algorithm. */
186 static void JNICALL
187 agentProc(jvmtiEnv* jvmti, JNIEnv* agentJNI, void* arg) {
188
189 if (!NSK_JVMTI_VERIFY(
190 NSK_CPP_STUB3(CreateRawMonitor, jvmti, "_syncLock", &syncLock))) {
191 nsk_jvmti_setFailStatus();
192 return;
193 }
194
195 jni = agentJNI;
196
197 NSK_DISPLAY0("Wait for debuggee to become ready\n");
198 if (!nsk_jvmti_waitForSync(timeout))
199 return;
200
201 if (!setCallBacks()) {
202 return;
203 }
204
205 if (!enableEvent(JVMTI_ENABLE, JVMTI_EVENT_CLASS_LOAD)
206 || !enableEvent(JVMTI_ENABLE, JVMTI_EVENT_CLASS_PREPARE)) {
207 NSK_COMPLAIN0("Events could not be enabled");
208 nsk_jvmti_setFailStatus();
209 return;
210 }
211
212 NSK_DISPLAY0("Let debuggee to load class\n");
213 if (!nsk_jvmti_resumeSync())
214 return;
215
216 if (!nsk_jvmti_waitForSync(timeout))
217 return;
218
219 if (!checkEvents()) {
220 nsk_jvmti_setFailStatus();
221 }
222
223 if (!enableEvent(JVMTI_DISABLE, JVMTI_EVENT_CLASS_LOAD)
224 || !enableEvent(JVMTI_DISABLE, JVMTI_EVENT_CLASS_PREPARE)) {
225 NSK_COMPLAIN0("Events could not be disabled");
226 nsk_jvmti_setFailStatus();
227 }
228
229 NSK_DISPLAY0("Let debuggee to finish\n");
230 if (!nsk_jvmti_resumeSync())
231 return;
232
233 if (!NSK_JVMTI_VERIFY(
234 NSK_CPP_STUB2(DestroyRawMonitor, jvmti, syncLock)))
235 nsk_jvmti_setFailStatus();
236
237 }
238
239 /* ============================================================================= */
240
241 /** Agent library initialization. */
242 #ifdef STATIC_BUILD
243 JNIEXPORT jint JNICALL Agent_OnLoad_em06t001(JavaVM *jvm, char *options, void *reserved) {
244 return Agent_Initialize(jvm, options, reserved);
245 }
246 JNIEXPORT jint JNICALL Agent_OnAttach_em06t001(JavaVM *jvm, char *options, void *reserved) {
247 return Agent_Initialize(jvm, options, reserved);
248 }
249 JNIEXPORT jint JNI_OnLoad_em06t001(JavaVM *jvm, char *options, void *reserved) {
250 return JNI_VERSION_1_8;
251 }
252 #endif
253 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
254
255 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
256 return JNI_ERR;
257
258 timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
259 classLoaderCount = nsk_jvmti_findOptionIntValue(CLASS_LOADER_COUNT_PARAM, 100);
260
261 if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
262 return JNI_ERR;
263
264 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
265 return JNI_ERR;
266
267 return JNI_OK;
268 }
269
270 /* ============================================================================= */
271
272
273 }