libAddModuleExportsAndOpensTest.c revision 12290:8953c0318163 
1/*
2 * Copyright (c) 2016, 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
29extern "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
49static const char *EXC_CNAME = "java/lang/Exception";
50static const char* MOD_CNAME = "Ljava/lang/reflect/Module;";
51
52static jvmtiEnv *jvmti = NULL;
53static jint result = PASSED;
54
55static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved);
56
57JNIEXPORT
58jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
59    return Agent_Initialize(jvm, options, reserved);
60}
61
62JNIEXPORT
63jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
64    return Agent_Initialize(jvm, options, reserved);
65}
66
67JNIEXPORT
68jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
69    return JNI_VERSION_1_8;
70}
71
72static
73jint 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
84static
85jint throw_exc(JNIEnv *env, char *msg) {
86    jclass exc_class = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, EXC_CNAME));
87
88    if (exc_class == NULL) {
89        printf("throw_exc: Error in FindClass(env, %s)\n", EXC_CNAME);
90        return -1;
91    }
92    return JNI_ENV_PTR(env)->ThrowNew(JNI_ENV_ARG(env, exc_class), msg);
93}
94
95static
96jclass jlrM(JNIEnv *env) {
97    jclass cls = NULL;
98
99    cls = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, MOD_CNAME));
100    if (cls == NULL) {
101        printf("    Error in JNI FindClass: %s\n", MOD_CNAME);
102    }
103    return cls;
104}
105
106jmethodID
107get_method(JNIEnv *env, jclass clazz, const char * name, const char *sig) {
108    jmethodID method = NULL;
109
110    method = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, clazz), name, sig);
111    if (method == NULL) {
112        printf("    Error in JNI GetMethodID %s with signature %s", name, sig);
113    }
114    return method;
115}
116
117static
118jboolean is_exported(JNIEnv *env, jobject module, const char* pkg, jboolean open) {
119    static jmethodID mIsExported = NULL;
120    jstring jstr = NULL;
121    jboolean res = JNI_FALSE;
122
123    if (mIsExported == NULL) {
124        const char* sign = "(Ljava/lang/String;)Z";
125        const char* name = open ? "isOpen" : "isExported";
126        mIsExported = get_method(env, jlrM(env), name, sign);
127    }
128    jstr = JNI_ENV_PTR(env)->NewStringUTF(JNI_ENV_ARG(env, pkg));
129    res = JNI_ENV_PTR(env)->CallBooleanMethod(JNI_ENV_ARG(env, module),
130                                              mIsExported, jstr);
131    return res;
132}
133
134static
135jboolean is_exported_to(JNIEnv *env, jobject module, const char* pkg, jobject to_module,
136                        jboolean open) {
137    static jmethodID mIsExportedTo = NULL;
138    jstring jstr = NULL;
139    jboolean res = JNI_FALSE;
140
141    if (mIsExportedTo == NULL) {
142        const char* sign = "(Ljava/lang/String;Ljava/lang/reflect/Module;)Z";
143        const char* name = open ? "isOpen" : "isExported";
144        mIsExportedTo = get_method(env, jlrM(env), name, sign);
145    }
146    jstr = JNI_ENV_PTR(env)->NewStringUTF(JNI_ENV_ARG(env, pkg));
147    res = JNI_ENV_PTR(env)->CallBooleanMethod(JNI_ENV_ARG(env, module),
148                                              mIsExportedTo, jstr, to_module);
149    return res;
150}
151
152static
153jvmtiError add_module_exports(jobject baseModule, const char* pkg, jobject thisModule,
154                              jboolean open) {
155    jvmtiError err = JVMTI_ERROR_NONE;
156    if (open) {
157        err = (*jvmti)->AddModuleOpens(jvmti, baseModule, pkg, thisModule);
158    } else {
159        err = (*jvmti)->AddModuleExports(jvmti, baseModule, pkg, thisModule);
160    }
161    return err;
162}
163
164static
165jint check_add_module_exports(JNIEnv *env,
166                              jclass  cls,
167                              jobject baseModule,
168                              jobject thisModule,
169                              jboolean open) {
170    static char strbuf[128] = { '\0' };
171    jvmtiError err = JVMTI_ERROR_NONE;
172    const char* pkg = open ? "jdk.internal.math"
173                           : "jdk.internal.misc";
174    const char* bad_pkg = "my.bad.pkg";
175    const char* jvmti_fn = open ? "AddModuleOpens"
176                                : "AddModuleExports";
177    jboolean exported = JNI_FALSE;
178
179    // Export from NULL module
180    printf("Check #N1:\n");
181    err = add_module_exports(NULL, pkg, thisModule, open);
182    if (err != JVMTI_ERROR_NULL_POINTER) {
183        printf("#N1: jvmtiError from %s: %d\n", jvmti_fn, err);
184        throw_exc(env, "Check #N1: failed to return JVMTI_ERROR_NULL_POINTER for module==NULL");
185        return FAILED;
186    }
187
188    // Export NULL package
189    printf("Check #N2:\n");
190    err = add_module_exports(baseModule, NULL, thisModule, open);
191    if (err != JVMTI_ERROR_NULL_POINTER) {
192        printf("#N2: jvmtiError from %s: %d\n", jvmti_fn, err);
193        throw_exc(env, "Check #N2: failed to return JVMTI_ERROR_NULL_POINTER for pkg==NULL");
194        return FAILED;
195    }
196
197    // Export to NULL module
198    printf("Check #N3:\n");
199    err = add_module_exports(baseModule, pkg, NULL, open);
200    if (err != JVMTI_ERROR_NULL_POINTER) {
201        printf("#N3: jvmtiError from %s: %d\n", jvmti_fn, err);
202        throw_exc(env, "Check #N3: failed to return JVMTI_ERROR_NULL_POINTER for to_module==NULL");
203        return FAILED;
204    }
205
206    // Export a bad package
207    printf("Check #I0:\n");
208    err = add_module_exports(baseModule, bad_pkg, thisModule, open);
209    if (err != JVMTI_ERROR_ILLEGAL_ARGUMENT) {
210        printf("#I0: jvmtiError from %s: %d\n", jvmti_fn, err);
211        throw_exc(env, "Check #I0: did not get expected JVMTI_ERROR_ILLEGAL_ARGUMENT for invalid package");
212        return FAILED;
213    }
214
215    // Export from invalid module (cls)
216    printf("Check #I1:\n");
217    err = add_module_exports((jobject)cls, pkg, thisModule, open);
218    if (err != JVMTI_ERROR_INVALID_MODULE) {
219        printf("#I1: jvmtiError from %s: %d\n", jvmti_fn, err);
220        throw_exc(env, "Check #I1: did not get expected JVMTI_ERROR_INVALID_MODULE for invalid module");
221        return FAILED;
222    }
223
224    // Export to invalid module (cls)
225    printf("Check #I2:\n");
226    err = add_module_exports(baseModule, pkg, (jobject)cls, open);
227    if (err != JVMTI_ERROR_INVALID_MODULE) {
228        printf("#I2: jvmtiError from %s: %d\n", jvmti_fn, err);
229        throw_exc(env, "Check #I2: did not get expected JVMTI_ERROR_INVALID_MODULE for invalid to_module");
230        return FAILED;
231    }
232
233    // Check the pkg is not exported from baseModule to thisModule
234    printf("Check #C0:\n");
235    exported = is_exported_to(env, baseModule, pkg, thisModule, open);
236    if (exported != JNI_FALSE) {
237        sprintf(strbuf, "Check #C0: unexpected export of %s from base to this", pkg);
238        throw_exc(env, strbuf);
239        return FAILED;
240    }
241
242    // Add export of the pkg from baseModule to thisModule
243    printf("Check #C1:\n");
244    err = add_module_exports(baseModule, pkg, thisModule, open);
245    if (err != JVMTI_ERROR_NONE) {
246        printf("#C1: jvmtiError from %s: %d\n", jvmti_fn, err);
247        sprintf(strbuf, "Check #C1: error in add export of %s from base to this", pkg);
248        throw_exc(env, strbuf);
249        return FAILED;
250    }
251
252    // Check the pkg is exported from baseModule to thisModule
253    printf("Check #C2:\n");
254    exported = is_exported_to(env, baseModule, pkg, thisModule, open);
255    if (exported == JNI_FALSE) {
256        sprintf(strbuf, "Check #C2: failed to export %s from base to this", pkg);
257        throw_exc(env, strbuf);
258        return FAILED;
259    }
260
261    // Check the pkg is not exported to all modules
262    printf("Check #C3:\n");
263    exported = is_exported(env, baseModule, pkg, open);
264    if (exported != JNI_FALSE) {
265        sprintf(strbuf, "Check #C3: unexpected export of %s from base to all modules", pkg);
266        throw_exc(env, strbuf);
267        return FAILED;
268    }
269    return PASSED;
270}
271
272JNIEXPORT jint JNICALL
273Java_MyPackage_AddModuleExportsAndOpensTest_check(JNIEnv *env,
274                                                  jclass cls,
275                                                  jobject baseModule,
276                                                  jobject thisModule) {
277    if (jvmti == NULL) {
278        throw_exc(env, "JVMTI client was not properly loaded!\n");
279        return FAILED;
280    }
281
282    printf("\n*** Checks for JVMTI AddModuleExports ***\n\n");
283    result = check_add_module_exports(env, cls, baseModule, thisModule, JNI_FALSE);
284    if (result != PASSED) {
285        return result;
286    }
287
288    printf("\n*** Checks for JVMTI AddModuleOpens ***\n\n");
289    result = check_add_module_exports(env, cls, baseModule, thisModule, JNI_TRUE);
290    if (result != PASSED) {
291        return result;
292    }
293    return result;
294}
295
296#ifdef __cplusplus
297}
298#endif
299