1 /*
2 * Copyright (c) 1994, 2015, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <string.h>
27
28 #include "jni.h"
29 #include "jni_util.h"
30 #include "jvm.h"
31 #include "java_props.h"
32
33 #include "java_lang_System.h"
34
35 #define OBJ "Ljava/lang/Object;"
36
37 /* Only register the performance-critical methods */
38 static JNINativeMethod methods[] = {
39 {"currentTimeMillis", "()J", (void *)&JVM_CurrentTimeMillis},
40 {"nanoTime", "()J", (void *)&JVM_NanoTime},
41 {"arraycopy", "(" OBJ "I" OBJ "II)V", (void *)&JVM_ArrayCopy},
42 };
43
44 #undef OBJ
45
46 JNIEXPORT void JNICALL
47 Java_java_lang_System_registerNatives(JNIEnv *env, jclass cls)
48 {
49 (*env)->RegisterNatives(env, cls,
50 methods, sizeof(methods)/sizeof(methods[0]));
51 }
52
53 JNIEXPORT jint JNICALL
54 Java_java_lang_System_identityHashCode(JNIEnv *env, jobject this, jobject x)
55 {
56 return JVM_IHashCode(env, x);
57 }
58
59 #define PUTPROP(props, key, val) \
60 if (1) { \
61 jstring jkey, jval; \
62 jobject r; \
63 jkey = (*env)->NewStringUTF(env, key); \
64 if (jkey == NULL) return NULL; \
65 jval = (*env)->NewStringUTF(env, val); \
66 if (jval == NULL) return NULL; \
67 r = (*env)->CallObjectMethod(env, props, putID, jkey, jval); \
68 if ((*env)->ExceptionOccurred(env)) return NULL; \
69 (*env)->DeleteLocalRef(env, jkey); \
70 (*env)->DeleteLocalRef(env, jval); \
71 (*env)->DeleteLocalRef(env, r); \
72 } else ((void) 0)
73
74 /* "key" is a char type string with only ASCII character in it.
75 "val" is a nchar (typedefed in java_props.h) type string */
76
77 #define PUTPROP_ForPlatformNString(props, key, val) \
78 if (1) { \
79 jstring jkey, jval; \
80 jobject r; \
81 jkey = (*env)->NewStringUTF(env, key); \
82 if (jkey == NULL) return NULL; \
83 jval = GetStringPlatform(env, val); \
84 if (jval == NULL) return NULL; \
85 r = (*env)->CallObjectMethod(env, props, putID, jkey, jval); \
86 if ((*env)->ExceptionOccurred(env)) return NULL; \
87 (*env)->DeleteLocalRef(env, jkey); \
88 (*env)->DeleteLocalRef(env, jval); \
89 (*env)->DeleteLocalRef(env, r); \
90 } else ((void) 0)
91 #define REMOVEPROP(props, key) \
92 if (1) { \
93 jstring jkey; \
94 jobject r; \
95 jkey = JNU_NewStringPlatform(env, key); \
96 if (jkey == NULL) return NULL; \
97 r = (*env)->CallObjectMethod(env, props, removeID, jkey); \
98 if ((*env)->ExceptionOccurred(env)) return NULL; \
99 (*env)->DeleteLocalRef(env, jkey); \
100 (*env)->DeleteLocalRef(env, r); \
101 } else ((void) 0)
102 #define GETPROP(props, key, jret) \
103 if (1) { \
104 jstring jkey = JNU_NewStringPlatform(env, key); \
105 if (jkey == NULL) return NULL; \
106 jret = (*env)->CallObjectMethod(env, props, getPropID, jkey); \
107 if ((*env)->ExceptionOccurred(env)) return NULL; \
108 (*env)->DeleteLocalRef(env, jkey); \
109 } else ((void) 0)
110
111 #ifndef VENDOR /* Third party may overwrite this. */
112 #define VENDOR "Oracle Corporation"
113 #define VENDOR_URL "http://java.oracle.com/"
114 #define VENDOR_URL_BUG "http://bugreport.java.com/bugreport/"
115 #endif
116
117 #define JAVA_MAX_SUPPORTED_VERSION 52
118 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
119
120 #ifdef JAVA_SPECIFICATION_VENDOR /* Third party may NOT overwrite this. */
121 #error "ERROR: No override of JAVA_SPECIFICATION_VENDOR is allowed"
122 #else
123 #define JAVA_SPECIFICATION_VENDOR "Oracle Corporation"
124 #endif
125
126 static int fmtdefault; // boolean value
127 jobject fillI18nProps(JNIEnv *env, jobject props, char *baseKey,
128 char *platformDispVal, char *platformFmtVal,
129 jmethodID putID, jmethodID getPropID) {
130 jstring jVMBaseVal = NULL;
131
132 GETPROP(props, baseKey, jVMBaseVal);
133 if (jVMBaseVal) {
134 // user specified the base property. there's nothing to do here.
135 (*env)->DeleteLocalRef(env, jVMBaseVal);
136 } else {
137 char buf[64];
138 jstring jVMVal = NULL;
139 const char *baseVal = "";
140
141 /* user.xxx base property */
142 if (fmtdefault) {
143 if (platformFmtVal) {
144 PUTPROP(props, baseKey, platformFmtVal);
145 baseVal = platformFmtVal;
146 }
147 } else {
148 if (platformDispVal) {
149 PUTPROP(props, baseKey, platformDispVal);
150 baseVal = platformDispVal;
151 }
152 }
153
154 /* user.xxx.display property */
155 jio_snprintf(buf, sizeof(buf), "%s.display", baseKey);
156 GETPROP(props, buf, jVMVal);
157 if (jVMVal == NULL) {
158 if (platformDispVal && (strcmp(baseVal, platformDispVal) != 0)) {
159 PUTPROP(props, buf, platformDispVal);
160 }
161 } else {
162 (*env)->DeleteLocalRef(env, jVMVal);
163 }
164
165 /* user.xxx.format property */
166 jio_snprintf(buf, sizeof(buf), "%s.format", baseKey);
167 GETPROP(props, buf, jVMVal);
168 if (jVMVal == NULL) {
169 if (platformFmtVal && (strcmp(baseVal, platformFmtVal) != 0)) {
170 PUTPROP(props, buf, platformFmtVal);
171 }
172 } else {
173 (*env)->DeleteLocalRef(env, jVMVal);
174 }
175 }
176
177 return NULL;
178 }
179
180 JNIEXPORT jobject JNICALL
181 Java_java_lang_System_initProperties(JNIEnv *env, jclass cla, jobject props)
182 {
183 char buf[128];
184 java_props_t *sprops;
185 jmethodID putID, removeID, getPropID;
186 jobject ret = NULL;
187 jstring jVMVal = NULL;
188
189 sprops = GetJavaProperties(env);
190 CHECK_NULL_RETURN(sprops, NULL);
191
192 putID = (*env)->GetMethodID(env,
193 (*env)->GetObjectClass(env, props),
194 "put",
195 "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
196 CHECK_NULL_RETURN(putID, NULL);
197
198 removeID = (*env)->GetMethodID(env,
199 (*env)->GetObjectClass(env, props),
200 "remove",
201 "(Ljava/lang/Object;)Ljava/lang/Object;");
202 CHECK_NULL_RETURN(removeID, NULL);
203
204 getPropID = (*env)->GetMethodID(env,
205 (*env)->GetObjectClass(env, props),
206 "getProperty",
207 "(Ljava/lang/String;)Ljava/lang/String;");
208 CHECK_NULL_RETURN(getPropID, NULL);
209
210 PUTPROP(props, "java.specification.version",
211 VERSION_SPECIFICATION);
212 PUTPROP(props, "java.specification.name",
213 "Java Platform API Specification");
214 PUTPROP(props, "java.specification.vendor",
215 JAVA_SPECIFICATION_VENDOR);
216
217 PUTPROP(props, "java.version", VERSION_SHORT);
218 PUTPROP(props, "java.vendor", VENDOR);
219 PUTPROP(props, "java.vendor.url", VENDOR_URL);
220 PUTPROP(props, "java.vendor.url.bug", VENDOR_URL_BUG);
221
222 jio_snprintf(buf, sizeof(buf), "%d.%d", JAVA_MAX_SUPPORTED_VERSION,
223 JAVA_MAX_SUPPORTED_MINOR_VERSION);
224 PUTPROP(props, "java.class.version", buf);
225
226 if (sprops->awt_toolkit) {
227 PUTPROP(props, "awt.toolkit", sprops->awt_toolkit);
228 }
229 #ifdef MACOSX
230 if (sprops->awt_headless) {
231 PUTPROP(props, "java.awt.headless", sprops->awt_headless);
232 }
233 #endif
234
235 /* os properties */
236 PUTPROP(props, "os.name", sprops->os_name);
237 PUTPROP(props, "os.version", sprops->os_version);
238 PUTPROP(props, "os.arch", sprops->os_arch);
239
240 #ifdef JDK_ARCH_ABI_PROP_NAME
241 PUTPROP(props, "sun.arch.abi", sprops->sun_arch_abi);
242 #endif
243
244 /* file system properties */
245 PUTPROP(props, "file.separator", sprops->file_separator);
246 PUTPROP(props, "path.separator", sprops->path_separator);
247 PUTPROP(props, "line.separator", sprops->line_separator);
248
249 /*
250 * user.language
251 * user.script, user.country, user.variant (if user's environment specifies them)
252 * file.encoding
253 * file.encoding.pkg
254 */
255 PUTPROP(props, "user.language", sprops->language);
256 if (sprops->script) {
257 PUTPROP(props, "user.script", sprops->script);
258 }
259 if (sprops->country) {
260 PUTPROP(props, "user.country", sprops->country);
261 }
262 if (sprops->variant) {
263 PUTPROP(props, "user.variant", sprops->variant);
264 }
265 PUTPROP(props, "file.encoding", sprops->encoding);
266 PUTPROP(props, "sun.jnu.encoding", sprops->sun_jnu_encoding);
267 if (sprops->sun_stdout_encoding != NULL) {
268 PUTPROP(props, "sun.stdout.encoding", sprops->sun_stdout_encoding);
269 }
270 if (sprops->sun_stderr_encoding != NULL) {
271 PUTPROP(props, "sun.stderr.encoding", sprops->sun_stderr_encoding);
272 }
273 PUTPROP(props, "file.encoding.pkg", "sun.io");
274
275 /* unicode_encoding specifies the default endianness */
276 PUTPROP(props, "sun.io.unicode.encoding", sprops->unicode_encoding);
277 PUTPROP(props, "sun.cpu.isalist",
278 (sprops->cpu_isalist ? sprops->cpu_isalist : ""));
279 PUTPROP(props, "sun.cpu.endian", sprops->cpu_endian);
280
281
282 #ifdef MACOSX
283 /* Proxy setting properties */
284 if (sprops->httpProxyEnabled) {
285 PUTPROP(props, "http.proxyHost", sprops->httpHost);
286 PUTPROP(props, "http.proxyPort", sprops->httpPort);
287 }
288
289 if (sprops->httpsProxyEnabled) {
290 PUTPROP(props, "https.proxyHost", sprops->httpsHost);
291 PUTPROP(props, "https.proxyPort", sprops->httpsPort);
292 }
293
294 if (sprops->ftpProxyEnabled) {
295 PUTPROP(props, "ftp.proxyHost", sprops->ftpHost);
296 PUTPROP(props, "ftp.proxyPort", sprops->ftpPort);
297 }
298
299 if (sprops->socksProxyEnabled) {
300 PUTPROP(props, "socksProxyHost", sprops->socksHost);
301 PUTPROP(props, "socksProxyPort", sprops->socksPort);
302 }
303
304 if (sprops->gopherProxyEnabled) {
305 // The gopher client is different in that it expects an 'is this set?' flag that the others don't.
306 PUTPROP(props, "gopherProxySet", "true");
307 PUTPROP(props, "gopherProxyHost", sprops->gopherHost);
308 PUTPROP(props, "gopherProxyPort", sprops->gopherPort);
309 } else {
310 PUTPROP(props, "gopherProxySet", "false");
311 }
312
313 // Mac OS X only has a single proxy exception list which applies
314 // to all protocols
315 if (sprops->exceptionList) {
316 PUTPROP(props, "http.nonProxyHosts", sprops->exceptionList);
317 PUTPROP(props, "ftp.nonProxyHosts", sprops->exceptionList);
318 PUTPROP(props, "socksNonProxyHosts", sprops->exceptionList);
319 }
320 #endif
321
322 /* !!! DO NOT call PUTPROP_ForPlatformNString before this line !!!
323 * !!! I18n properties have not been set up yet !!!
324 */
325
326 /* Printing properties */
327 /* Note: java.awt.printerjob is an implementation private property which
328 * just happens to have a java.* name because it is referenced in
329 * a java.awt class. It is the mechanism by which the implementation
330 * finds the appropriate class in the JRE for the platform.
331 * It is explicitly not designed to be overridden by clients as
332 * a way of replacing the implementation class, and in any case
333 * the mechanism by which the class is loaded is constrained to only
334 * find and load classes that are part of the JRE.
335 * This property may be removed if that mechanism is redesigned
336 */
337 PUTPROP(props, "java.awt.printerjob", sprops->printerJob);
338
339 /* data model */
340 if (sizeof(sprops) == 4) {
341 sprops->data_model = "32";
342 } else if (sizeof(sprops) == 8) {
343 sprops->data_model = "64";
344 } else {
345 sprops->data_model = "unknown";
346 }
347 PUTPROP(props, "sun.arch.data.model", \
348 sprops->data_model);
349
350 /* patch level */
351 PUTPROP(props, "sun.os.patch.level", \
352 sprops->patch_level);
353
354 /* Java2D properties */
355 /* Note: java.awt.graphicsenv is an implementation private property which
356 * just happens to have a java.* name because it is referenced in
357 * a java.awt class. It is the mechanism by which the implementation
358 * finds the appropriate class in the JRE for the platform.
359 * It is explicitly not designed to be overridden by clients as
360 * a way of replacing the implementation class, and in any case
361 * the mechanism by which the class is loaded is constrained to only
362 * find and load classes that are part of the JRE.
363 * This property may be removed if that mechanism is redesigned
364 */
365 PUTPROP(props, "java.awt.graphicsenv", sprops->graphics_env);
366 if (sprops->font_dir != NULL) {
367 PUTPROP_ForPlatformNString(props,
368 "sun.java2d.fontpath", sprops->font_dir);
369 }
370
371 PUTPROP_ForPlatformNString(props, "java.io.tmpdir", sprops->tmp_dir);
372
373 PUTPROP_ForPlatformNString(props, "user.name", sprops->user_name);
374 PUTPROP_ForPlatformNString(props, "user.home", sprops->user_home);
375
376 PUTPROP(props, "user.timezone", sprops->timezone);
377
378 PUTPROP_ForPlatformNString(props, "user.dir", sprops->user_dir);
379
380 /* This is a sun. property as it is currently only set for Gnome and
381 * Windows desktops.
382 */
383 if (sprops->desktop != NULL) {
384 PUTPROP(props, "sun.desktop", sprops->desktop);
385 }
386
387 /*
388 * unset "user.language", "user.script", "user.country", and "user.variant"
389 * in order to tell whether the command line option "-DXXXX=YYYY" is
390 * specified or not. They will be reset in fillI18nProps() below.
391 */
392 REMOVEPROP(props, "user.language");
393 REMOVEPROP(props, "user.script");
394 REMOVEPROP(props, "user.country");
395 REMOVEPROP(props, "user.variant");
396 REMOVEPROP(props, "file.encoding");
397
398 ret = JVM_InitProperties(env, props);
399
400 /* Check the compatibility flag */
401 GETPROP(props, "sun.locale.formatasdefault", jVMVal);
402 if (jVMVal) {
403 const char * val = (*env)->GetStringUTFChars(env, jVMVal, 0);
404 CHECK_NULL_RETURN(val, NULL);
405 fmtdefault = !strcmp(val, "true");
406 (*env)->ReleaseStringUTFChars(env, jVMVal, val);
407 (*env)->DeleteLocalRef(env, jVMVal);
408 }
409
410 /* reconstruct i18n related properties */
411 fillI18nProps(env, props, "user.language", sprops->display_language,
412 sprops->format_language, putID, getPropID);
413 fillI18nProps(env, props, "user.script",
414 sprops->display_script, sprops->format_script, putID, getPropID);
415 fillI18nProps(env, props, "user.country",
416 sprops->display_country, sprops->format_country, putID, getPropID);
417 fillI18nProps(env, props, "user.variant",
418 sprops->display_variant, sprops->format_variant, putID, getPropID);
419 GETPROP(props, "file.encoding", jVMVal);
420 if (jVMVal == NULL) {
421 #ifdef MACOSX
422 /*
423 * Since sun_jnu_encoding is now hard-coded to UTF-8 on Mac, we don't
424 * want to use it to overwrite file.encoding
425 */
426 PUTPROP(props, "file.encoding", sprops->encoding);
427 #else
428 if (fmtdefault) {
429 PUTPROP(props, "file.encoding", sprops->encoding);
430 } else {
431 PUTPROP(props, "file.encoding", sprops->sun_jnu_encoding);
432 }
433 #endif
434 } else {
435 (*env)->DeleteLocalRef(env, jVMVal);
436 }
437
438 return ret;
439 }
440
441 /*
442 * The following three functions implement setter methods for
443 * java.lang.System.{in, out, err}. They are natively implemented
444 * because they violate the semantics of the language (i.e. set final
445 * variable).
446 */
447 JNIEXPORT void JNICALL
448 Java_java_lang_System_setIn0(JNIEnv *env, jclass cla, jobject stream)
449 {
450 jfieldID fid =
451 (*env)->GetStaticFieldID(env,cla,"in","Ljava/io/InputStream;");
452 if (fid == 0)
453 return;
454 (*env)->SetStaticObjectField(env,cla,fid,stream);
455 }
456
457 JNIEXPORT void JNICALL
458 Java_java_lang_System_setOut0(JNIEnv *env, jclass cla, jobject stream)
459 {
460 jfieldID fid =
461 (*env)->GetStaticFieldID(env,cla,"out","Ljava/io/PrintStream;");
462 if (fid == 0)
463 return;
464 (*env)->SetStaticObjectField(env,cla,fid,stream);
465 }
466
467 JNIEXPORT void JNICALL
468 Java_java_lang_System_setErr0(JNIEnv *env, jclass cla, jobject stream)
469 {
470 jfieldID fid =
471 (*env)->GetStaticFieldID(env,cla,"err","Ljava/io/PrintStream;");
472 if (fid == 0)
473 return;
474 (*env)->SetStaticObjectField(env,cla,fid,stream);
475 }
476
477 static void cpchars(jchar *dst, char *src, int n)
478 {
479 int i;
480 for (i = 0; i < n; i++) {
481 dst[i] = src[i];
482 }
483 }
484
485 JNIEXPORT jstring JNICALL
486 Java_java_lang_System_mapLibraryName(JNIEnv *env, jclass ign, jstring libname)
487 {
488 int len;
489 int prefix_len = (int) strlen(JNI_LIB_PREFIX);
490 int suffix_len = (int) strlen(JNI_LIB_SUFFIX);
491
492 jchar chars[256];
493 if (libname == NULL) {
494 JNU_ThrowNullPointerException(env, 0);
495 return NULL;
496 }
497 len = (*env)->GetStringLength(env, libname);
498 if (len > 240) {
499 JNU_ThrowIllegalArgumentException(env, "name too long");
500 return NULL;
501 }
502 cpchars(chars, JNI_LIB_PREFIX, prefix_len);
503 (*env)->GetStringRegion(env, libname, 0, len, chars + prefix_len);
504 len += prefix_len;
505 cpchars(chars + len, JNI_LIB_SUFFIX, suffix_len);
506 len += suffix_len;
507
508 return (*env)->NewString(env, chars, len);
509 }