1 /*
2 * Copyright (c) 2003, 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 <stdio.h>
25 #include <string.h>
26 #include "jvmti.h"
27 #include "agent_common.h"
28 #include "JVMTITools.h"
29
30 extern "C" {
31
32
33 #define PASSED 0
34 #define STATUS_FAILED 2
35
36 static jvmtiEnv *jvmti = NULL;
37 static jint result = PASSED;
38 static jboolean printdump = JNI_FALSE;
39
40 #ifdef STATIC_BUILD
41 JNIEXPORT jint JNICALL Agent_OnLoad_clsldrclss00x(JavaVM *jvm, char *options, void *reserved) {
42 return Agent_Initialize(jvm, options, reserved);
43 }
44 JNIEXPORT jint JNICALL Agent_OnAttach_clsldrclss00x(JavaVM *jvm, char *options, void *reserved) {
45 return Agent_Initialize(jvm, options, reserved);
46 }
47 JNIEXPORT jint JNI_OnLoad_clsldrclss00x(JavaVM *jvm, char *options, void *reserved) {
48 return JNI_VERSION_1_8;
49 }
50 #endif
51 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
52 jint res;
53
54 if (options != NULL && strcmp(options, "printdump") == 0) {
55 printdump = JNI_TRUE;
56 }
57
58 res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
59 if (res != JNI_OK || jvmti == NULL) {
60 printf("Wrong result of a valid call to GetEnv!\n");
61 return JNI_ERR;
62 }
63
64 return JNI_OK;
65 }
66
67 JNIEXPORT jint JNICALL
68 Java_nsk_jvmti_unit_clsldrclss00x_check(JNIEnv *env, jclass appCls, jclass objCls) {
69 jvmtiError err;
70 jobject appClassloader;
71 jobject objClassloader;
72 jclass *classes;
73 jint classCount;
74 jboolean found;
75 jint i;
76
77 if (jvmti == NULL) {
78 printf("JVMTI client was not properly loaded!\n");
79 return STATUS_FAILED;
80 }
81
82 err = jvmti->GetClassLoader(appCls, &appClassloader);
83 if (err != JVMTI_ERROR_NONE) {
84 printf("(GetClassLoader app) unexpected error: %s (%d)\n",
85 TranslateError(err), err);
86 result = STATUS_FAILED;
87 }
88 if (appClassloader == NULL) {
89 printf("(GetClassLoader app) unexpected loader - NULL\n");
90 result = STATUS_FAILED;
91 }
92
93 err = jvmti->GetClassLoader(objCls, &objClassloader);
94 if (err != JVMTI_ERROR_NONE) {
95 printf("(GetClassLoader obj) unexpected error: %s (%d)\n",
96 TranslateError(err), err);
97 result = STATUS_FAILED;
98 }
99 if (objClassloader != NULL) {
100 printf("(GetClassLoader obj) unexpected loader - !NULL\n");
101 result = STATUS_FAILED;
102 }
103
104 err = jvmti->GetClassLoaderClasses(appClassloader, &classCount, &classes);
105 if (err != JVMTI_ERROR_NONE) {
106 printf("Error (GetClassLoaderClasses app): %s (%d)\n", TranslateError(err), err);
107 result = STATUS_FAILED;
108 }
109 if (printdump) {
110 printf(">>> number of classes in app class loader: %d\n", classCount);
111 if (JNI_FALSE) {
112 for (i = 0; i < classCount; ++i) {
113 char *classSig;
114 jclass k = classes[i];
115 err = jvmti->GetClassSignature(k, &classSig, NULL);
116 if (err != JVMTI_ERROR_NONE) {
117 printf("Error (getClassSignature): %s (%d)\n", TranslateError(err), err);
118 result = STATUS_FAILED;
119 } else {
120 printf(" %s\n", classSig);
121 err = jvmti->Deallocate((unsigned char*)classSig);
122 if (err != JVMTI_ERROR_NONE) {
123 printf("Error (Deallocate): %s (%d)\n", TranslateError(err), err);
124 result = STATUS_FAILED;
125 }
126 }
127 }
128 }
129 }
130 found = JNI_FALSE;
131 for (i = 0; i < classCount; ++i) {
132 jclass k = classes[i];
133 if ( env->IsSameObject(k, appCls) ) {
134 if (printdump) {
135 printf(">>> found app class in app class loader\n");
136 }
137 found = JNI_TRUE;
138 break;
139 }
140 }
141 if (!found) {
142 printf("Error: didn't find app class in app class loader\n");
143 result = STATUS_FAILED;
144 }
145
146 err = jvmti->GetClassLoaderClasses(objClassloader, &classCount, &classes);
147 if (err != JVMTI_ERROR_NONE) {
148 printf("Error (GetClassLoaderClasses obj): %s (%d)\n", TranslateError(err), err);
149 result = STATUS_FAILED;
150 }
151 if (printdump) {
152 printf(">>> number of classes in bootstrap class loader: %d\n", classCount);
153 }
154 found = JNI_FALSE;
155 for (i = 0; i < classCount; ++i) {
156 jclass k = classes[i];
157 if ( env->IsSameObject(k, objCls) ) {
158 if (printdump) {
159 printf(">>> found Object class in bootstrap class loader\n");
160 }
161 found = JNI_TRUE;
162 break;
163 }
164 }
165 if (!found) {
166 printf("Error: didn't find Object class in bootstrap class loader\n");
167 result = STATUS_FAILED;
168 }
169
170 if (printdump) {
171 printf(">>> ... done\n");
172 }
173
174 return result;
175 }
176
177 }