1 /*
2 * Copyright (c) 1994, 2012, 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 = (*env)->NewStringUTF(env, key); \
62 jstring jval = (*env)->NewStringUTF(env, val); \
63 jobject r = (*env)->CallObjectMethod(env, props, putID, jkey, jval); \
64 if ((*env)->ExceptionOccurred(env)) return NULL; \
65 (*env)->DeleteLocalRef(env, jkey); \
66 (*env)->DeleteLocalRef(env, jval); \
67 (*env)->DeleteLocalRef(env, r); \
68 } else ((void) 0)
69
70 /* "key" is a char type string with only ASCII character in it.
71 "val" is a nchar (typedefed in java_props.h) type string */
72
73 #define PUTPROP_ForPlatformNString(props, key, val) \
74 if (1) { \
75 jstring jkey = (*env)->NewStringUTF(env, key); \
76 jstring jval = GetStringPlatform(env, val); \
77 jobject r = (*env)->CallObjectMethod(env, props, putID, jkey, jval); \
78 if ((*env)->ExceptionOccurred(env)) return NULL; \
79 (*env)->DeleteLocalRef(env, jkey); \
80 (*env)->DeleteLocalRef(env, jval); \
81 (*env)->DeleteLocalRef(env, r); \
82 } else ((void) 0)
83 #define REMOVEPROP(props, key) \
84 if (1) { \
85 jstring jkey = JNU_NewStringPlatform(env, key); \
86 jobject r = (*env)->CallObjectMethod(env, props, removeID, jkey); \
87 if ((*env)->ExceptionOccurred(env)) return NULL; \
88 (*env)->DeleteLocalRef(env, jkey); \
89 (*env)->DeleteLocalRef(env, r); \
90 } else ((void) 0)
91 #define GETPROP(props, key, jret) \
92 if (1) { \
93 jstring jkey = JNU_NewStringPlatform(env, key); \
94 jret = (*env)->CallObjectMethod(env, props, getPropID, jkey); \
95 if ((*env)->ExceptionOccurred(env)) return NULL; \
96 (*env)->DeleteLocalRef(env, jkey); \
97 } else ((void) 0)
98
99 #ifndef VENDOR /* Third party may overwrite this. */
100 #define VENDOR "Oracle Corporation"
101 #define VENDOR_URL "http://java.oracle.com/"
102 #define VENDOR_URL_BUG "http://bugreport.sun.com/bugreport/"
103 #endif
104
105 #define JAVA_MAX_SUPPORTED_VERSION 52
106 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
107
108 #ifdef JAVA_SPECIFICATION_VENDOR /* Third party may NOT overwrite this. */
109 #error "ERROR: No override of JAVA_SPECIFICATION_VENDOR is allowed"
110 #else
111 #define JAVA_SPECIFICATION_VENDOR "Oracle Corporation"
112 #endif
113
114 static int fmtdefault; // boolean value
115 jobject fillI18nProps(JNIEnv *env, jobject props, char *baseKey,
116 char *platformDispVal, char *platformFmtVal,
117 jmethodID putID, jmethodID getPropID) {
118 jstring jVMBaseVal = NULL;
119
120 GETPROP(props, baseKey, jVMBaseVal);
121 if (jVMBaseVal) {
122 // user specified the base property. there's nothing to do here.
123 (*env)->DeleteLocalRef(env, jVMBaseVal);
124 } else {
125 char buf[64];
126 jstring jVMVal = NULL;
127 const char *baseVal = "";
128
129 /* user.xxx base property */
130 if (fmtdefault) {
131 if (platformFmtVal) {
132 PUTPROP(props, baseKey, platformFmtVal);
133 baseVal = platformFmtVal;
134 }
135 } else {
136 if (platformDispVal) {
137 PUTPROP(props, baseKey, platformDispVal);
138 baseVal = platformDispVal;
139 }
140 }
141
142 /* user.xxx.display property */
143 jio_snprintf(buf, sizeof(buf), "%s.display", baseKey);
144 GETPROP(props, buf, jVMVal);
145 if (jVMVal == NULL) {
146 if (platformDispVal && (strcmp(baseVal, platformDispVal) != 0)) {
147 PUTPROP(props, buf, platformDispVal);
148 }
149 } else {
150 (*env)->DeleteLocalRef(env, jVMVal);
151 }
152
153 /* user.xxx.format property */
154 jio_snprintf(buf, sizeof(buf), "%s.format", baseKey);
155 GETPROP(props, buf, jVMVal);
156 if (jVMVal == NULL) {
157 if (platformFmtVal && (strcmp(baseVal, platformFmtVal) != 0)) {
158 PUTPROP(props, buf, platformFmtVal);
159 }
160 } else {
161 (*env)->DeleteLocalRef(env, jVMVal);
162 }
163 }
164
165 return NULL;
166 }
167
168 JNIEXPORT jobject JNICALL
169 Java_java_lang_System_initProperties(JNIEnv *env, jclass cla, jobject props)
170 {
171 char buf[128];
172 java_props_t *sprops = GetJavaProperties(env);
173 jmethodID putID = (*env)->GetMethodID(env,
174 (*env)->GetObjectClass(env, props),
175 "put",
176 "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
177 jmethodID removeID = (*env)->GetMethodID(env,
178 (*env)->GetObjectClass(env, props),
179 "remove",
180 "(Ljava/lang/Object;)Ljava/lang/Object;");
181 jmethodID getPropID = (*env)->GetMethodID(env,
182 (*env)->GetObjectClass(env, props),
183 "getProperty",
184 "(Ljava/lang/String;)Ljava/lang/String;");
185 jobject ret = NULL;
186 jstring jVMVal = NULL;
187
188 if (sprops == NULL || putID == NULL ) return NULL;
189
190 PUTPROP(props, "java.specification.version",
191 JDK_MAJOR_VERSION "." JDK_MINOR_VERSION);
192 PUTPROP(props, "java.specification.name",
193 "Java Platform API Specification");
194 PUTPROP(props, "java.specification.vendor",
195 JAVA_SPECIFICATION_VENDOR);
196
197 PUTPROP(props, "java.version", RELEASE);
198 PUTPROP(props, "java.vendor", VENDOR);
199 PUTPROP(props, "java.vendor.url", VENDOR_URL);
200 PUTPROP(props, "java.vendor.url.bug", VENDOR_URL_BUG);
201
202 jio_snprintf(buf, sizeof(buf), "%d.%d", JAVA_MAX_SUPPORTED_VERSION,
203 JAVA_MAX_SUPPORTED_MINOR_VERSION);
204 PUTPROP(props, "java.class.version", buf);
205
206 if (sprops->awt_toolkit) {
207 PUTPROP(props, "awt.toolkit", sprops->awt_toolkit);
208 }
209 if (sprops->awt_headless) {
210 PUTPROP(props, "java.awt.headless", sprops->awt_headless);
211 }
212
213 /* os properties */
214 PUTPROP(props, "os.name", sprops->os_name);
215 PUTPROP(props, "os.version", sprops->os_version);
216 PUTPROP(props, "os.arch", sprops->os_arch);
217
218 #ifdef JDK_ARCH_ABI_PROP_NAME
219 PUTPROP(props, "sun.arch.abi", sprops->sun_arch_abi);
220 #endif
221
222 /* file system properties */
223 PUTPROP(props, "file.separator", sprops->file_separator);
224 PUTPROP(props, "path.separator", sprops->path_separator);
225 PUTPROP(props, "line.separator", sprops->line_separator);
226
227 /*
228 * user.language
229 * user.script, user.country, user.variant (if user's environment specifies them)
230 * file.encoding
231 * file.encoding.pkg
232 */
233 PUTPROP(props, "user.language", sprops->language);
234 if (sprops->script) {
235 PUTPROP(props, "user.script", sprops->script);
236 }
237 if (sprops->country) {
238 PUTPROP(props, "user.country", sprops->country);
239 }
240 if (sprops->variant) {
241 PUTPROP(props, "user.variant", sprops->variant);
242 }
243 PUTPROP(props, "file.encoding", sprops->encoding);
244 PUTPROP(props, "sun.jnu.encoding", sprops->sun_jnu_encoding);
245 if (sprops->sun_stdout_encoding != NULL) {
246 PUTPROP(props, "sun.stdout.encoding", sprops->sun_stdout_encoding);
247 }
248 if (sprops->sun_stderr_encoding != NULL) {
249 PUTPROP(props, "sun.stderr.encoding", sprops->sun_stderr_encoding);
250 }
251 PUTPROP(props, "file.encoding.pkg", "sun.io");
252
253 /* unicode_encoding specifies the default endianness */
254 PUTPROP(props, "sun.io.unicode.encoding", sprops->unicode_encoding);
255 PUTPROP(props, "sun.cpu.isalist",
256 (sprops->cpu_isalist ? sprops->cpu_isalist : ""));
257 PUTPROP(props, "sun.cpu.endian", sprops->cpu_endian);
258
259
260 #ifdef MACOSX
261 /* Proxy setting properties */
262 if (sprops->httpProxyEnabled) {
263 PUTPROP(props, "http.proxyHost", sprops->httpHost);
264 PUTPROP(props, "http.proxyPort", sprops->httpPort);
265 }
266
267 if (sprops->httpsProxyEnabled) {
268 PUTPROP(props, "https.proxyHost", sprops->httpsHost);
269 PUTPROP(props, "https.proxyPort", sprops->httpsPort);
270 }
271
272 if (sprops->ftpProxyEnabled) {
273 PUTPROP(props, "ftp.proxyHost", sprops->ftpHost);
274 PUTPROP(props, "ftp.proxyPort", sprops->ftpPort);
275 }
276
277 if (sprops->socksProxyEnabled) {
278 PUTPROP(props, "socksProxyHost", sprops->socksHost);
279 PUTPROP(props, "socksProxyPort", sprops->socksPort);
280 }
281
282 if (sprops->gopherProxyEnabled) {
283 // The gopher client is different in that it expects an 'is this set?' flag that the others don't.
284 PUTPROP(props, "gopherProxySet", "true");
285 PUTPROP(props, "gopherProxyHost", sprops->gopherHost);
286 PUTPROP(props, "gopherProxyPort", sprops->gopherPort);
287 } else {
288 PUTPROP(props, "gopherProxySet", "false");
289 }
290
291 // Mac OS X only has a single proxy exception list which applies
292 // to all protocols
293 if (sprops->exceptionList) {
294 PUTPROP(props, "http.nonProxyHosts", sprops->exceptionList);
295 // HTTPS: implementation in jsse.jar uses http.nonProxyHosts
296 PUTPROP(props, "ftp.nonProxyHosts", sprops->exceptionList);
297 PUTPROP(props, "socksNonProxyHosts", sprops->exceptionList);
298 }
299 #endif
300
301 /* !!! DO NOT call PUTPROP_ForPlatformNString before this line !!!
302 * !!! I18n properties have not been set up yet !!!
303 */
304
305 /* Printing properties */
306 /* Note: java.awt.printerjob is an implementation private property which
307 * just happens to have a java.* name because it is referenced in
308 * a java.awt class. It is the mechanism by which the implementation
309 * finds the appropriate class in the JRE for the platform.
310 * It is explicitly not designed to be overridden by clients as
311 * a way of replacing the implementation class, and in any case
312 * the mechanism by which the class is loaded is constrained to only
313 * find and load classes that are part of the JRE.
314 * This property may be removed if that mechanism is redesigned
315 */
316 PUTPROP(props, "java.awt.printerjob", sprops->printerJob);
317
318 /* data model */
319 if (sizeof(sprops) == 4) {
320 sprops->data_model = "32";
321 } else if (sizeof(sprops) == 8) {
322 sprops->data_model = "64";
323 } else {
324 sprops->data_model = "unknown";
325 }
326 PUTPROP(props, "sun.arch.data.model", \
327 sprops->data_model);
328
329 /* patch level */
330 PUTPROP(props, "sun.os.patch.level", \
331 sprops->patch_level);
332
333 /* Java2D properties */
334 /* Note: java.awt.graphicsenv is an implementation private property which
335 * just happens to have a java.* name because it is referenced in
336 * a java.awt class. It is the mechanism by which the implementation
337 * finds the appropriate class in the JRE for the platform.
338 * It is explicitly not designed to be overridden by clients as
339 * a way of replacing the implementation class, and in any case
340 * the mechanism by which the class is loaded is constrained to only
341 * find and load classes that are part of the JRE.
342 * This property may be removed if that mechanism is redesigned
343 */
344 PUTPROP(props, "java.awt.graphicsenv", sprops->graphics_env);
345 if (sprops->font_dir != NULL) {
346 PUTPROP_ForPlatformNString(props,
347 "sun.java2d.fontpath", sprops->font_dir);
348 }
349
350 PUTPROP_ForPlatformNString(props, "java.io.tmpdir", sprops->tmp_dir);
351
352 PUTPROP_ForPlatformNString(props, "user.name", sprops->user_name);
353 PUTPROP_ForPlatformNString(props, "user.home", sprops->user_home);
354
355 PUTPROP(props, "user.timezone", sprops->timezone);
356
357 PUTPROP_ForPlatformNString(props, "user.dir", sprops->user_dir);
358
359 /* This is a sun. property as it is currently only set for Gnome and
360 * Windows desktops.
361 */
362 if (sprops->desktop != NULL) {
363 PUTPROP(props, "sun.desktop", sprops->desktop);
364 }
365
366 /*
367 * unset "user.language", "user.script", "user.country", and "user.variant"
368 * in order to tell whether the command line option "-DXXXX=YYYY" is
369 * specified or not. They will be reset in fillI18nProps() below.
370 */
371 REMOVEPROP(props, "user.language");
372 REMOVEPROP(props, "user.script");
373 REMOVEPROP(props, "user.country");
374 REMOVEPROP(props, "user.variant");
375 REMOVEPROP(props, "file.encoding");
376
377 ret = JVM_InitProperties(env, props);
378
379 /* Check the compatibility flag */
380 GETPROP(props, "sun.locale.formatasdefault", jVMVal);
381 if (jVMVal) {
382 const char * val = (*env)->GetStringUTFChars(env, jVMVal, 0);
383 fmtdefault = !strcmp(val, "true");
384 (*env)->ReleaseStringUTFChars(env, jVMVal, val);
385 (*env)->DeleteLocalRef(env, jVMVal);
386 }
387
388 /* reconstruct i18n related properties */
389 fillI18nProps(env, props, "user.language", sprops->display_language,
390 sprops->format_language, putID, getPropID);
391 fillI18nProps(env, props, "user.script",
392 sprops->display_script, sprops->format_script, putID, getPropID);
393 fillI18nProps(env, props, "user.country",
394 sprops->display_country, sprops->format_country, putID, getPropID);
395 fillI18nProps(env, props, "user.variant",
396 sprops->display_variant, sprops->format_variant, putID, getPropID);
397 GETPROP(props, "file.encoding", jVMVal);
398 if (jVMVal == NULL) {
399 #ifdef MACOSX
400 /*
401 * Since sun_jnu_encoding is now hard-coded to UTF-8 on Mac, we don't
402 * want to use it to overwrite file.encoding
403 */
404 PUTPROP(props, "file.encoding", sprops->encoding);
405 #else
406 if (fmtdefault) {
407 PUTPROP(props, "file.encoding", sprops->encoding);
408 } else {
409 PUTPROP(props, "file.encoding", sprops->sun_jnu_encoding);
410 }
411 #endif
412 } else {
413 (*env)->DeleteLocalRef(env, jVMVal);
414 }
415
416 return ret;
417 }
418
419 /*
420 * The following three functions implement setter methods for
421 * java.lang.System.{in, out, err}. They are natively implemented
422 * because they violate the semantics of the language (i.e. set final
423 * variable).
424 */
425 JNIEXPORT void JNICALL
426 Java_java_lang_System_setIn0(JNIEnv *env, jclass cla, jobject stream)
427 {
428 jfieldID fid =
429 (*env)->GetStaticFieldID(env,cla,"in","Ljava/io/InputStream;");
430 if (fid == 0)
431 return;
432 (*env)->SetStaticObjectField(env,cla,fid,stream);
433 }
434
435 JNIEXPORT void JNICALL
436 Java_java_lang_System_setOut0(JNIEnv *env, jclass cla, jobject stream)
437 {
438 jfieldID fid =
439 (*env)->GetStaticFieldID(env,cla,"out","Ljava/io/PrintStream;");
440 if (fid == 0)
441 return;
442 (*env)->SetStaticObjectField(env,cla,fid,stream);
443 }
444
445 JNIEXPORT void JNICALL
446 Java_java_lang_System_setErr0(JNIEnv *env, jclass cla, jobject stream)
447 {
448 jfieldID fid =
449 (*env)->GetStaticFieldID(env,cla,"err","Ljava/io/PrintStream;");
450 if (fid == 0)
451 return;
452 (*env)->SetStaticObjectField(env,cla,fid,stream);
453 }
454
455 static void cpchars(jchar *dst, char *src, int n)
456 {
457 int i;
458 for (i = 0; i < n; i++) {
459 dst[i] = src[i];
460 }
461 }
462
463 JNIEXPORT jstring JNICALL
464 Java_java_lang_System_mapLibraryName(JNIEnv *env, jclass ign, jstring libname)
465 {
466 int len;
467 int prefix_len = (int) strlen(JNI_LIB_PREFIX);
468 int suffix_len = (int) strlen(JNI_LIB_SUFFIX);
469
470 jchar chars[256];
471 if (libname == NULL) {
472 JNU_ThrowNullPointerException(env, 0);
473 return NULL;
474 }
475 len = (*env)->GetStringLength(env, libname);
476 if (len > 240) {
477 JNU_ThrowIllegalArgumentException(env, "name too long");
478 return NULL;
479 }
480 cpchars(chars, JNI_LIB_PREFIX, prefix_len);
481 (*env)->GetStringRegion(env, libname, 0, len, chars + prefix_len);
482 len += prefix_len;
483 cpchars(chars + len, JNI_LIB_SUFFIX, suffix_len);
484 len += suffix_len;
485
486 return (*env)->NewString(env, chars, len);
487 }