1 /*
2 * Copyright (c) 2016, 2017, 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
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31
32 #ifndef JNI_ENV_ARG
33
34 #ifdef __cplusplus
35 #define JNI_ENV_ARG(x, y) y
36 #define JNI_ENV_PTR(x) x
37 #else
38 #define JNI_ENV_ARG(x,y) x, y
39 #define JNI_ENV_PTR(x) (*x)
40 #endif
41
42 #endif
43
44 #define TranslateError(err) "JVMTI error"
45
46 #define PASSED 0
47 #define FAILED 2
48
49 static const char *EXC_CNAME = "java/lang/Exception";
50 static const char* MOD_CNAME = "Ljava/lang/Module;";
51
52 static jvmtiEnv *jvmti = NULL;
53 static jint result = PASSED;
54
55 static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved);
56
57 JNIEXPORT
Agent_OnLoad(JavaVM * jvm,char * options,void * reserved)58 jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
59 return Agent_Initialize(jvm, options, reserved);
60 }
61
62 JNIEXPORT
Agent_OnAttach(JavaVM * jvm,char * options,void * reserved)63 jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
64 return Agent_Initialize(jvm, options, reserved);
65 }
66
67 JNIEXPORT
JNI_OnLoad(JavaVM * jvm,void * reserved)68 jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
69 return JNI_VERSION_1_8;
70 }
71
72 static
Agent_Initialize(JavaVM * jvm,char * options,void * reserved)73 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
74 jint res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
75 JVMTI_VERSION_9);
76 if (res != JNI_OK || jvmti == NULL) {
77 printf(" Error: wrong result of a valid call to GetEnv!\n");
78 return JNI_ERR;
79 }
80
81 return JNI_OK;
82 }
83
84 static
throw_exc(JNIEnv * env,char * msg)85 void throw_exc(JNIEnv *env, char *msg) {
86 jclass exc_class = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, EXC_CNAME));
87 jint rt = JNI_OK;
88
89 if (exc_class == NULL) {
90 printf("throw_exc: Error in FindClass(env, %s)\n", EXC_CNAME);
91 return;
92 }
93 rt = JNI_ENV_PTR(env)->ThrowNew(JNI_ENV_ARG(env, exc_class), msg);
94 if (rt == JNI_ERR) {
95 printf("throw_exc: Error in JNI ThrowNew(env, %s)\n", msg);
96 }
97 }
98
99 static
jlM(JNIEnv * env)100 jclass jlM(JNIEnv *env) {
101 jclass cls = NULL;
102
103 cls = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, MOD_CNAME));
104 if (cls == NULL) {
105 printf(" Error in JNI FindClass: %s\n", MOD_CNAME);
106 }
107 return cls;
108 }
109
110 jmethodID
get_method(JNIEnv * env,jclass clazz,const char * name,const char * sig)111 get_method(JNIEnv *env, jclass clazz, const char * name, const char *sig) {
112 jmethodID method = NULL;
113
114 method = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, clazz), name, sig);
115 if (method == NULL) {
116 printf(" Error in JNI GetMethodID %s with signature %s", name, sig);
117 }
118 return method;
119 }
120
121 static
is_exported(JNIEnv * env,jobject module,const char * pkg,jboolean open)122 jboolean is_exported(JNIEnv *env, jobject module, const char* pkg, jboolean open) {
123 static jmethodID mIsExported = NULL;
124 jstring jstr = NULL;
125 jboolean res = JNI_FALSE;
126
127 if (mIsExported == NULL) {
128 const char* sign = "(Ljava/lang/String;)Z";
129 const char* name = open ? "isOpen" : "isExported";
130 mIsExported = get_method(env, jlM(env), name, sign);
131 }
132 jstr = JNI_ENV_PTR(env)->NewStringUTF(JNI_ENV_ARG(env, pkg));
133 res = JNI_ENV_PTR(env)->CallBooleanMethod(JNI_ENV_ARG(env, module),
134 mIsExported, jstr);
135 return res;
136 }
137
138 static
is_exported_to(JNIEnv * env,jobject module,const char * pkg,jobject to_module,jboolean open)139 jboolean is_exported_to(JNIEnv *env, jobject module, const char* pkg, jobject to_module,
140 jboolean open) {
141 static jmethodID mIsExportedTo = NULL;
142 jstring jstr = NULL;
143 jboolean res = JNI_FALSE;
144
145 if (mIsExportedTo == NULL) {
146 const char* sign = "(Ljava/lang/String;Ljava/lang/Module;)Z";
147 const char* name = open ? "isOpen" : "isExported";
148 mIsExportedTo = get_method(env, jlM(env), name, sign);
149 }
150 jstr = JNI_ENV_PTR(env)->NewStringUTF(JNI_ENV_ARG(env, pkg));
151 res = JNI_ENV_PTR(env)->CallBooleanMethod(JNI_ENV_ARG(env, module),
152 mIsExportedTo, jstr, to_module);
153 return res;
154 }
155
156 static
add_module_exports(jobject baseModule,const char * pkg,jobject thisModule,jboolean open)157 jvmtiError add_module_exports(jobject baseModule, const char* pkg, jobject thisModule,
158 jboolean open) {
159 jvmtiError err = JVMTI_ERROR_NONE;
160 if (open) {
161 err = (*jvmti)->AddModuleOpens(jvmti, baseModule, pkg, thisModule);
162 } else {
163 err = (*jvmti)->AddModuleExports(jvmti, baseModule, pkg, thisModule);
164 }
165 return err;
166 }
167
168 static
check_add_module_exports(JNIEnv * env,jclass cls,jobject baseModule,jobject thisModule,jboolean open)169 jint check_add_module_exports(JNIEnv *env,
170 jclass cls,
171 jobject baseModule,
172 jobject thisModule,
173 jboolean open) {
174 static char strbuf[128] = { '\0' };
175 jvmtiError err = JVMTI_ERROR_NONE;
176 const char* pkg = open ? "jdk.internal.math"
177 : "jdk.internal.misc";
178 const char* bad_pkg = "my.bad.pkg";
179 const char* jvmti_fn = open ? "AddModuleOpens"
180 : "AddModuleExports";
181 jboolean exported = JNI_FALSE;
182
183 // Export from NULL module
184 printf("Check #N1:\n");
185 err = add_module_exports(NULL, pkg, thisModule, open);
186 if (err != JVMTI_ERROR_NULL_POINTER) {
187 printf("#N1: jvmtiError from %s: %d\n", jvmti_fn, err);
188 throw_exc(env, "Check #N1: failed to return JVMTI_ERROR_NULL_POINTER for module==NULL");
189 return FAILED;
190 }
191
192 // Export NULL package
193 printf("Check #N2:\n");
194 err = add_module_exports(baseModule, NULL, thisModule, open);
195 if (err != JVMTI_ERROR_NULL_POINTER) {
196 printf("#N2: jvmtiError from %s: %d\n", jvmti_fn, err);
197 throw_exc(env, "Check #N2: failed to return JVMTI_ERROR_NULL_POINTER for pkg==NULL");
198 return FAILED;
199 }
200
201 // Export to NULL module
202 printf("Check #N3:\n");
203 err = add_module_exports(baseModule, pkg, NULL, open);
204 if (err != JVMTI_ERROR_NULL_POINTER) {
205 printf("#N3: jvmtiError from %s: %d\n", jvmti_fn, err);
206 throw_exc(env, "Check #N3: failed to return JVMTI_ERROR_NULL_POINTER for to_module==NULL");
207 return FAILED;
208 }
209
210 // Export a bad package
211 printf("Check #I0:\n");
212 err = add_module_exports(baseModule, bad_pkg, thisModule, open);
213 if (err != JVMTI_ERROR_ILLEGAL_ARGUMENT) {
214 printf("#I0: jvmtiError from %s: %d\n", jvmti_fn, err);
215 throw_exc(env, "Check #I0: did not get expected JVMTI_ERROR_ILLEGAL_ARGUMENT for invalid package");
216 return FAILED;
217 }
218
219 // Export from invalid module (cls)
220 printf("Check #I1:\n");
221 err = add_module_exports((jobject)cls, pkg, thisModule, open);
222 if (err != JVMTI_ERROR_INVALID_MODULE) {
223 printf("#I1: jvmtiError from %s: %d\n", jvmti_fn, err);
224 throw_exc(env, "Check #I1: did not get expected JVMTI_ERROR_INVALID_MODULE for invalid module");
225 return FAILED;
226 }
227
228 // Export to invalid module (cls)
229 printf("Check #I2:\n");
230 err = add_module_exports(baseModule, pkg, (jobject)cls, open);
231 if (err != JVMTI_ERROR_INVALID_MODULE) {
232 printf("#I2: jvmtiError from %s: %d\n", jvmti_fn, err);
233 throw_exc(env, "Check #I2: did not get expected JVMTI_ERROR_INVALID_MODULE for invalid to_module");
234 return FAILED;
235 }
236
237 // Check the pkg is not exported from baseModule to thisModule
238 printf("Check #C0:\n");
239 exported = is_exported_to(env, baseModule, pkg, thisModule, open);
240 if (exported != JNI_FALSE) {
241 sprintf(strbuf, "Check #C0: unexpected export of %s from base to this", pkg);
242 throw_exc(env, strbuf);
243 return FAILED;
244 }
245
246 // Add export of the pkg from baseModule to thisModule
247 printf("Check #C1:\n");
248 err = add_module_exports(baseModule, pkg, thisModule, open);
249 if (err != JVMTI_ERROR_NONE) {
250 printf("#C1: jvmtiError from %s: %d\n", jvmti_fn, err);
251 sprintf(strbuf, "Check #C1: error in add export of %s from base to this", pkg);
252 throw_exc(env, strbuf);
253 return FAILED;
254 }
255
256 // Check the pkg is exported from baseModule to thisModule
257 printf("Check #C2:\n");
258 exported = is_exported_to(env, baseModule, pkg, thisModule, open);
259 if (exported == JNI_FALSE) {
260 sprintf(strbuf, "Check #C2: failed to export %s from base to this", pkg);
261 throw_exc(env, strbuf);
262 return FAILED;
263 }
264
265 // Check the pkg is not exported to all modules
266 printf("Check #C3:\n");
267 exported = is_exported(env, baseModule, pkg, open);
268 if (exported != JNI_FALSE) {
269 sprintf(strbuf, "Check #C3: unexpected export of %s from base to all modules", pkg);
270 throw_exc(env, strbuf);
271 return FAILED;
272 }
273 return PASSED;
274 }
275
276 JNIEXPORT jint JNICALL
Java_MyPackage_AddModuleExportsAndOpensTest_check(JNIEnv * env,jclass cls,jobject baseModule,jobject thisModule)277 Java_MyPackage_AddModuleExportsAndOpensTest_check(JNIEnv *env,
278 jclass cls,
279 jobject baseModule,
280 jobject thisModule) {
281 if (jvmti == NULL) {
282 throw_exc(env, "JVMTI client was not properly loaded!\n");
283 return FAILED;
284 }
285
286 printf("\n*** Checks for JVMTI AddModuleExports ***\n\n");
287 result = check_add_module_exports(env, cls, baseModule, thisModule, JNI_FALSE);
288 if (result != PASSED) {
289 return result;
290 }
291
292 printf("\n*** Checks for JVMTI AddModuleOpens ***\n\n");
293 result = check_add_module_exports(env, cls, baseModule, thisModule, JNI_TRUE);
294 if (result != PASSED) {
295 return result;
296 }
297 return result;
298 }
299
300 #ifdef __cplusplus
301 }
302 #endif
303