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 <stdlib.h>
25 #include <string.h>
26 #include "jvmti.h"
27 #include "agent_common.h"
28 #include "jni_tools.h"
29 #include "jvmti_tools.h"
30
31 extern "C" {
32
33 #define PASSED 0
34 #define STATUS_FAILED 2
35
36 /* ============================================================================= */
37
38 static jlong timeout = 0;
39 static const char* segment = NULL;
40 static const char* EXP_CLASS_SIGNATURE = "Lnsk/jvmti/scenarios/general_functions/GF04/gf04t001;";
41 static jrawMonitorID countLock;
42 static jboolean classLoadReceived = JNI_FALSE, classPrepareReceived = JNI_FALSE;
43 static jint result = PASSED;
44
45 /* ============================================================================= */
46
47 /**
48 * Add segment to bootstrap classloader path.
49 * @returns NSK_FALSE if any error occured.
50 */
51 static int addSegment(jvmtiEnv* jvmti, const char segment[], const char where[]) {
52 void* storage = NULL;
53
54 NSK_DISPLAY1("Add segment: %s\n", segment);
55 if (!NSK_JVMTI_VERIFY(jvmti->AddToBootstrapClassLoaderSearch(segment))) {
56 return NSK_FALSE;
57 }
58 NSK_DISPLAY0(" ... added\n");
59
60 return NSK_TRUE;
61 }
62
63 static void setupLock(jvmtiEnv *jvmti_env, JNIEnv *jni_env) {
64 if (!NSK_JVMTI_VERIFY(jvmti_env->RawMonitorEnter(countLock)))
65 jni_env->FatalError("failed to enter a raw monitor\n");
66 }
67
68 static void setoffLock(jvmtiEnv *jvmti_env, JNIEnv *jni_env) {
69 if (!NSK_JVMTI_VERIFY(jvmti_env->RawMonitorExit(countLock)))
70 jni_env->FatalError("failed to exit a raw monitor\n");
71 }
72
73 JNIEXPORT jint JNICALL
74 Java_nsk_jvmti_scenarios_general_1functions_GF04_gf04t001_check(
75 JNIEnv *env, jobject obj) {
76 if (result == PASSED && classLoadReceived == JNI_TRUE && classPrepareReceived == JNI_TRUE) {
77 return PASSED;
78 }
79 return STATUS_FAILED;
80 }
81
82 /* ============================================================================= */
83
84 /** callback for ClassLoad event **/
85 void JNICALL
86 ClassLoad(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread, jclass klass) {
87 char *sig, *generic;
88
89 setupLock(jvmti_env, env);
90
91 if (!NSK_JVMTI_VERIFY(jvmti_env->GetClassSignature(klass, &sig, &generic))) {
92 result = STATUS_FAILED;
93 }
94
95 if (strcmp(sig, EXP_CLASS_SIGNATURE) == 0) {
96 NSK_DISPLAY1("CHECK PASSED: ClassLoad event received for the class \"%s\" as expected\n",
97 sig);
98 classLoadReceived = JNI_TRUE;
99
100 if (!NSK_JVMTI_VERIFY(jvmti_env->SetEventNotificationMode(JVMTI_DISABLE, JVMTI_EVENT_CLASS_LOAD, NULL))) {
101 result = STATUS_FAILED;
102 } else {
103 NSK_DISPLAY0("ClassLoad event disabled\n");
104 }
105 }
106
107 setoffLock(jvmti_env, env);
108 }
109
110 /** callback for ClassPrepare event **/
111 void JNICALL
112 ClassPrepare(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread, jclass klass) {
113 char *sig, *generic;
114
115 setupLock(jvmti_env, env);
116
117 if (!NSK_JVMTI_VERIFY(jvmti_env->GetClassSignature(klass, &sig, &generic))) {
118 result = STATUS_FAILED;
119 }
120
121 if (strcmp(sig, EXP_CLASS_SIGNATURE) == 0) {
122 NSK_DISPLAY1("CHECK PASSED: ClassPrepare event received for the class \"%s\" as expected\n",
123 sig);
124 classPrepareReceived = JNI_TRUE;
125
126 if (!NSK_JVMTI_VERIFY(jvmti_env->SetEventNotificationMode(JVMTI_DISABLE, JVMTI_EVENT_CLASS_PREPARE, NULL))) {
127 result = STATUS_FAILED;
128 } else {
129 NSK_DISPLAY0("ClassPrepare event disabled\n");
130 }
131 }
132
133 setoffLock(jvmti_env, env);
134 }
135
136 /* ============================================================================= */
137
138 /** Agent library initialization. */
139 #ifdef STATIC_BUILD
140 JNIEXPORT jint JNICALL Agent_OnLoad_gf04t001(JavaVM *jvm, char *options, void *reserved) {
141 return Agent_Initialize(jvm, options, reserved);
142 }
143 JNIEXPORT jint JNICALL Agent_OnAttach_gf04t001(JavaVM *jvm, char *options, void *reserved) {
144 return Agent_Initialize(jvm, options, reserved);
145 }
146 JNIEXPORT jint JNI_OnLoad_gf04t001(JavaVM *jvm, char *options, void *reserved) {
147 return JNI_VERSION_1_8;
148 }
149 #endif
150 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
151 jvmtiEnv* jvmti = NULL;
152
153 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
154 return JNI_ERR;
155
156 timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
157
158 segment = nsk_jvmti_findOptionStringValue("segment", NULL);
159 if (!NSK_VERIFY(segment != NULL))
160 return JNI_ERR;
161
162 if (!NSK_VERIFY((jvmti =
163 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
164 return JNI_ERR;
165
166 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("eventLock", &countLock)))
167 return JNI_ERR;
168
169 NSK_DISPLAY0("Add bootstrap class load segment in Agent_OnLoad()\n");
170 if (!addSegment(jvmti, segment, "Agent_OnLoad()")) {
171 return JNI_ERR;
172 }
173
174 NSK_DISPLAY0("Setting callbacks for events:\n");
175 {
176 jvmtiEventCallbacks callbacks;
177 jint size = (jint)sizeof(callbacks);
178
179 memset(&callbacks, 0, sizeof(callbacks));
180 callbacks.ClassLoad = &ClassLoad;
181 callbacks.ClassPrepare = &ClassPrepare;
182 if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&callbacks, size))) {
183 return JNI_ERR;
184 }
185 }
186 NSK_DISPLAY0(" ... set\n");
187
188 NSK_DISPLAY0("Enabling events: \n");
189 if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_CLASS_LOAD, NULL))) {
190 return JNI_ERR;
191 } else {
192 NSK_DISPLAY0(" ... ClassLoad enabled\n");
193 }
194 if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_CLASS_PREPARE, NULL))) {
195 return JNI_ERR;
196 } else {
197 NSK_DISPLAY0(" ... ClassPrepare enabled\n");
198 }
199
200 return JNI_OK;
201 }
202
203 /* ============================================================================= */
204
205 }