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 #ifdef __cplusplus
31 extern "C" {
32 #endif
33
34 #ifndef JNI_ENV_ARG
35
36 #ifdef __cplusplus
37 #define JNI_ENV_ARG(x, y) y
38 #define JNI_ENV_PTR(x) x
39 #else
40 #define JNI_ENV_ARG(x,y) x, y
41 #define JNI_ENV_PTR(x) (*x)
42 #endif
43
44 #endif
45
46 #define PASSED 0
47 #define STATUS_FAILED 2
48
49 static jvmtiEnv *jvmti = NULL;
50 static jint result = PASSED;
51 static jboolean printdump = JNI_FALSE;
52
53 #ifdef STATIC_BUILD
54 JNIEXPORT jint JNICALL Agent_OnLoad_clsldrclss00x(JavaVM *jvm, char *options, void *reserved) {
55 return Agent_Initialize(jvm, options, reserved);
56 }
57 JNIEXPORT jint JNICALL Agent_OnAttach_clsldrclss00x(JavaVM *jvm, char *options, void *reserved) {
58 return Agent_Initialize(jvm, options, reserved);
59 }
60 JNIEXPORT jint JNI_OnLoad_clsldrclss00x(JavaVM *jvm, char *options, void *reserved) {
61 return JNI_VERSION_1_8;
62 }
63 #endif
64 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
65 jint res;
66
67 if (options != NULL && strcmp(options, "printdump") == 0) {
68 printdump = JNI_TRUE;
69 }
70
71 res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
72 JVMTI_VERSION_1_1);
73 if (res != JNI_OK || jvmti == NULL) {
74 printf("Wrong result of a valid call to GetEnv!\n");
75 return JNI_ERR;
76 }
77
78 return JNI_OK;
79 }
80
81 JNIEXPORT jint JNICALL
82 Java_nsk_jvmti_unit_clsldrclss00x_check(JNIEnv *env, jclass appCls, jclass objCls) {
83 jvmtiError err;
84 jobject appClassloader;
85 jobject objClassloader;
86 jclass *classes;
87 jint classCount;
88 jboolean found;
89 jint i;
90
91 if (jvmti == NULL) {
92 printf("JVMTI client was not properly loaded!\n");
93 return STATUS_FAILED;
94 }
95
96 err = jvmti->GetClassLoader(appCls, &appClassloader);
97 if (err != JVMTI_ERROR_NONE) {
98 printf("(GetClassLoader app) unexpected error: %s (%d)\n",
99 TranslateError(err), err);
100 result = STATUS_FAILED;
101 }
102 if (appClassloader == NULL) {
103 printf("(GetClassLoader app) unexpected loader - NULL\n");
104 result = STATUS_FAILED;
105 }
106
107 err = jvmti->GetClassLoader(objCls, &objClassloader);
108 if (err != JVMTI_ERROR_NONE) {
109 printf("(GetClassLoader obj) unexpected error: %s (%d)\n",
110 TranslateError(err), err);
111 result = STATUS_FAILED;
112 }
113 if (objClassloader != NULL) {
114 printf("(GetClassLoader obj) unexpected loader - !NULL\n");
115 result = STATUS_FAILED;
116 }
117
118 err = jvmti->GetClassLoaderClasses(appClassloader, &classCount, &classes);
119 if (err != JVMTI_ERROR_NONE) {
120 printf("Error (GetClassLoaderClasses app): %s (%d)\n", TranslateError(err), err);
121 result = STATUS_FAILED;
122 }
123 if (printdump) {
124 printf(">>> number of classes in app class loader: %d\n", classCount);
125 if (JNI_FALSE) {
126 for (i = 0; i < classCount; ++i) {
127 char *classSig;
128 jclass k = classes[i];
129 err = jvmti->GetClassSignature(k, &classSig, NULL);
130 if (err != JVMTI_ERROR_NONE) {
131 printf("Error (getClassSignature): %s (%d)\n", TranslateError(err), err);
132 result = STATUS_FAILED;
133 } else {
134 printf(" %s\n", classSig);
135 err = jvmti->Deallocate((unsigned char*)classSig);
136 if (err != JVMTI_ERROR_NONE) {
137 printf("Error (Deallocate): %s (%d)\n", TranslateError(err), err);
138 result = STATUS_FAILED;
139 }
140 }
141 }
142 }
143 }
144 found = JNI_FALSE;
145 for (i = 0; i < classCount; ++i) {
146 jclass k = classes[i];
147 if ( env->IsSameObject(k, appCls) ) {
148 if (printdump) {
149 printf(">>> found app class in app class loader\n");
150 }
151 found = JNI_TRUE;
152 break;
153 }
154 }
155 if (!found) {
156 printf("Error: didn't find app class in app class loader\n");
157 result = STATUS_FAILED;
158 }
159
160 err = jvmti->GetClassLoaderClasses(objClassloader, &classCount, &classes);
161 if (err != JVMTI_ERROR_NONE) {
162 printf("Error (GetClassLoaderClasses obj): %s (%d)\n", TranslateError(err), err);
163 result = STATUS_FAILED;
164 }
165 if (printdump) {
166 printf(">>> number of classes in bootstrap class loader: %d\n", classCount);
167 }
168 found = JNI_FALSE;
169 for (i = 0; i < classCount; ++i) {
170 jclass k = classes[i];
171 if ( env->IsSameObject(k, objCls) ) {
172 if (printdump) {
173 printf(">>> found Object class in bootstrap class loader\n");
174 }
175 found = JNI_TRUE;
176 break;
177 }
178 }
179 if (!found) {
180 printf("Error: didn't find Object class in bootstrap class loader\n");
181 result = STATUS_FAILED;
182 }
183
184 if (printdump) {
185 printf(">>> ... done\n");
186 }
187
188 return result;
189 }
190
191 #ifdef __cplusplus
192 }
193 #endif