1 /* 2 * Copyright (c) 1994, 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. 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 /* Third party may overwrite these values. */ 112 #ifndef VENDOR 113 #define VENDOR "Oracle Corporation" 114 #endif 115 #ifndef VENDOR_URL 116 #define VENDOR_URL "http://java.oracle.com/" 117 #endif 118 #ifndef VENDOR_URL_BUG 119 #define VENDOR_URL_BUG "http://bugreport.java.com/bugreport/" 120 #endif 121 122 #ifdef JAVA_SPECIFICATION_VENDOR /* Third party may NOT overwrite this. */ 123 #error "ERROR: No override of JAVA_SPECIFICATION_VENDOR is allowed" 124 #else 125 #define JAVA_SPECIFICATION_VENDOR "Oracle Corporation" 126 #endif 127 128 jobject fillI18nProps(JNIEnv *env, jobject props, char *baseKey, 129 char *platformDispVal, char *platformFmtVal, 130 jmethodID putID, jmethodID getPropID) { 131 jstring jVMBaseVal = NULL; 132 133 GETPROP(props, baseKey, jVMBaseVal); 134 if (jVMBaseVal) { 135 // user specified the base property. there's nothing to do here. 136 (*env)->DeleteLocalRef(env, jVMBaseVal); 137 } else { 138 char buf[64]; 139 jstring jVMVal = NULL; 140 const char *baseVal = ""; 141 142 /* user.xxx base property */ 143 if (platformDispVal) { 144 PUTPROP(props, baseKey, platformDispVal); 145 baseVal = platformDispVal; 146 } 147 148 /* user.xxx.display property */ 149 jio_snprintf(buf, sizeof(buf), "%s.display", baseKey); 150 GETPROP(props, buf, jVMVal); 151 if (jVMVal == NULL) { 152 if (platformDispVal && (strcmp(baseVal, platformDispVal) != 0)) { 153 PUTPROP(props, buf, platformDispVal); 154 } 155 } else { 156 (*env)->DeleteLocalRef(env, jVMVal); 157 } 158 159 /* user.xxx.format property */ 160 jio_snprintf(buf, sizeof(buf), "%s.format", baseKey); 161 GETPROP(props, buf, jVMVal); 162 if (jVMVal == NULL) { 163 if (platformFmtVal && (strcmp(baseVal, platformFmtVal) != 0)) { 164 PUTPROP(props, buf, platformFmtVal); 165 } 166 } else { 167 (*env)->DeleteLocalRef(env, jVMVal); 168 } 169 } 170 171 return NULL; 172 } 173 174 JNIEXPORT jobject JNICALL 175 Java_java_lang_System_initProperties(JNIEnv *env, jclass cla, jobject props) 176 { 177 char buf[128]; 178 java_props_t *sprops; 179 jmethodID putID, removeID, getPropID; 180 jobject ret = NULL; 181 jstring jVMVal = NULL; 182 183 if ((*env)->EnsureLocalCapacity(env, 50) < 0) { 184 return NULL; 185 } 186 sprops = GetJavaProperties(env); 187 CHECK_NULL_RETURN(sprops, NULL); 188 189 putID = (*env)->GetMethodID(env, 190 (*env)->GetObjectClass(env, props), 191 "put", 192 "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;"); 193 CHECK_NULL_RETURN(putID, NULL); 194 195 removeID = (*env)->GetMethodID(env, 196 (*env)->GetObjectClass(env, props), 197 "remove", 198 "(Ljava/lang/Object;)Ljava/lang/Object;"); 199 CHECK_NULL_RETURN(removeID, NULL); 200 201 getPropID = (*env)->GetMethodID(env, 202 (*env)->GetObjectClass(env, props), 203 "getProperty", 204 "(Ljava/lang/String;)Ljava/lang/String;"); 205 CHECK_NULL_RETURN(getPropID, NULL); 206 207 PUTPROP(props, "java.specification.version", 208 VERSION_SPECIFICATION); 209 PUTPROP(props, "java.specification.name", 210 "Java Platform API Specification"); 211 PUTPROP(props, "java.specification.vendor", 212 JAVA_SPECIFICATION_VENDOR); 213 214 PUTPROP(props, "java.version", VERSION_SHORT); 215 PUTPROP(props, "java.vendor", VENDOR); 216 PUTPROP(props, "java.vendor.url", VENDOR_URL); 217 PUTPROP(props, "java.vendor.url.bug", VENDOR_URL_BUG); 218 219 jio_snprintf(buf, sizeof(buf), "%d.%d", JVM_CLASSFILE_MAJOR_VERSION, 220 JVM_CLASSFILE_MINOR_VERSION); 221 PUTPROP(props, "java.class.version", buf); 222 223 if (sprops->awt_toolkit) { 224 PUTPROP(props, "awt.toolkit", sprops->awt_toolkit); 225 } 226 #ifdef MACOSX 227 if (sprops->awt_headless) { 228 PUTPROP(props, "java.awt.headless", sprops->awt_headless); 229 } 230 #endif 231 232 /* os properties */ 233 PUTPROP(props, "os.name", sprops->os_name); 234 PUTPROP(props, "os.version", sprops->os_version); 235 PUTPROP(props, "os.arch", sprops->os_arch); 236 237 #ifdef JDK_ARCH_ABI_PROP_NAME 238 PUTPROP(props, "sun.arch.abi", sprops->sun_arch_abi); 239 #endif 240 241 /* file system properties */ 242 PUTPROP(props, "file.separator", sprops->file_separator); 243 PUTPROP(props, "path.separator", sprops->path_separator); 244 PUTPROP(props, "line.separator", sprops->line_separator); 245 246 /* 247 * user.language 248 * user.script, user.country, user.variant (if user's environment specifies them) 249 * file.encoding 250 * file.encoding.pkg 251 */ 252 PUTPROP(props, "user.language", sprops->language); 253 if (sprops->script) { 254 PUTPROP(props, "user.script", sprops->script); 255 } 256 if (sprops->country) { 257 PUTPROP(props, "user.country", sprops->country); 258 } 259 if (sprops->variant) { 260 PUTPROP(props, "user.variant", sprops->variant); 261 } 262 PUTPROP(props, "file.encoding", sprops->encoding); 263 PUTPROP(props, "sun.jnu.encoding", sprops->sun_jnu_encoding); 264 if (sprops->sun_stdout_encoding != NULL) { 265 PUTPROP(props, "sun.stdout.encoding", sprops->sun_stdout_encoding); 266 } 267 if (sprops->sun_stderr_encoding != NULL) { 268 PUTPROP(props, "sun.stderr.encoding", sprops->sun_stderr_encoding); 269 } 270 PUTPROP(props, "file.encoding.pkg", "sun.io"); 271 272 /* unicode_encoding specifies the default endianness */ 273 PUTPROP(props, "sun.io.unicode.encoding", sprops->unicode_encoding); 274 PUTPROP(props, "sun.cpu.isalist", 275 (sprops->cpu_isalist ? sprops->cpu_isalist : "")); 276 PUTPROP(props, "sun.cpu.endian", sprops->cpu_endian); 277 278 279 #ifdef MACOSX 280 /* Proxy setting properties */ 281 if (sprops->httpProxyEnabled) { 282 PUTPROP(props, "http.proxyHost", sprops->httpHost); 283 PUTPROP(props, "http.proxyPort", sprops->httpPort); 284 } 285 286 if (sprops->httpsProxyEnabled) { 287 PUTPROP(props, "https.proxyHost", sprops->httpsHost); 288 PUTPROP(props, "https.proxyPort", sprops->httpsPort); 289 } 290 291 if (sprops->ftpProxyEnabled) { 292 PUTPROP(props, "ftp.proxyHost", sprops->ftpHost); 293 PUTPROP(props, "ftp.proxyPort", sprops->ftpPort); 294 } 295 296 if (sprops->socksProxyEnabled) { 297 PUTPROP(props, "socksProxyHost", sprops->socksHost); 298 PUTPROP(props, "socksProxyPort", sprops->socksPort); 299 } 300 301 if (sprops->gopherProxyEnabled) { 302 // The gopher client is different in that it expects an 'is this set?' flag that the others don't. 303 PUTPROP(props, "gopherProxySet", "true"); 304 PUTPROP(props, "gopherProxyHost", sprops->gopherHost); 305 PUTPROP(props, "gopherProxyPort", sprops->gopherPort); 306 } else { 307 PUTPROP(props, "gopherProxySet", "false"); 308 } 309 310 // Mac OS X only has a single proxy exception list which applies 311 // to all protocols 312 if (sprops->exceptionList) { 313 PUTPROP(props, "http.nonProxyHosts", sprops->exceptionList); 314 PUTPROP(props, "ftp.nonProxyHosts", sprops->exceptionList); 315 PUTPROP(props, "socksNonProxyHosts", sprops->exceptionList); 316 } 317 #endif 318 319 /* !!! DO NOT call PUTPROP_ForPlatformNString before this line !!! 320 * !!! I18n properties have not been set up yet !!! 321 */ 322 323 /* Printing properties */ 324 /* Note: java.awt.printerjob is an implementation private property which 325 * just happens to have a java.* name because it is referenced in 326 * a java.awt class. It is the mechanism by which the implementation 327 * finds the appropriate class in the JRE for the platform. 328 * It is explicitly not designed to be overridden by clients as 329 * a way of replacing the implementation class, and in any case 330 * the mechanism by which the class is loaded is constrained to only 331 * find and load classes that are part of the JRE. 332 * This property may be removed if that mechanism is redesigned 333 */ 334 PUTPROP(props, "java.awt.printerjob", sprops->printerJob); 335 336 /* data model */ 337 if (sizeof(sprops) == 4) { 338 sprops->data_model = "32"; 339 } else if (sizeof(sprops) == 8) { 340 sprops->data_model = "64"; 341 } else { 342 sprops->data_model = "unknown"; 343 } 344 PUTPROP(props, "sun.arch.data.model", \ 345 sprops->data_model); 346 347 /* patch level */ 348 PUTPROP(props, "sun.os.patch.level", \ 349 sprops->patch_level); 350 351 /* Java2D properties */ 352 /* Note: java.awt.graphicsenv is an implementation private property which 353 * just happens to have a java.* name because it is referenced in 354 * a java.awt class. It is the mechanism by which the implementation 355 * finds the appropriate class in the JRE for the platform. 356 * It is explicitly not designed to be overridden by clients as 357 * a way of replacing the implementation class, and in any case 358 * the mechanism by which the class is loaded is constrained to only 359 * find and load classes that are part of the JRE. 360 * This property may be removed if that mechanism is redesigned 361 */ 362 PUTPROP(props, "java.awt.graphicsenv", sprops->graphics_env); 363 if (sprops->font_dir != NULL) { 364 PUTPROP_ForPlatformNString(props, 365 "sun.java2d.fontpath", sprops->font_dir); 366 } 367 368 PUTPROP_ForPlatformNString(props, "java.io.tmpdir", sprops->tmp_dir); 369 370 PUTPROP_ForPlatformNString(props, "user.name", sprops->user_name); 371 PUTPROP_ForPlatformNString(props, "user.home", sprops->user_home); 372 373 PUTPROP(props, "user.timezone", sprops->timezone); 374 375 PUTPROP_ForPlatformNString(props, "user.dir", sprops->user_dir); 376 377 /* This is a sun. property as it is currently only set for Gnome and 378 * Windows desktops. 379 */ 380 if (sprops->desktop != NULL) { 381 PUTPROP(props, "sun.desktop", sprops->desktop); 382 } 383 384 /* 385 * unset "user.language", "user.script", "user.country", and "user.variant" 386 * in order to tell whether the command line option "-DXXXX=YYYY" is 387 * specified or not. They will be reset in fillI18nProps() below. 388 */ 389 REMOVEPROP(props, "user.language"); 390 REMOVEPROP(props, "user.script"); 391 REMOVEPROP(props, "user.country"); 392 REMOVEPROP(props, "user.variant"); 393 REMOVEPROP(props, "file.encoding"); 394 395 ret = JVM_InitProperties(env, props); 396 397 /* reconstruct i18n related properties */ 398 fillI18nProps(env, props, "user.language", sprops->display_language, 399 sprops->format_language, putID, getPropID); 400 fillI18nProps(env, props, "user.script", 401 sprops->display_script, sprops->format_script, putID, getPropID); 402 fillI18nProps(env, props, "user.country", 403 sprops->display_country, sprops->format_country, putID, getPropID); 404 fillI18nProps(env, props, "user.variant", 405 sprops->display_variant, sprops->format_variant, putID, getPropID); 406 GETPROP(props, "file.encoding", jVMVal); 407 if (jVMVal == NULL) { 408 #ifdef MACOSX 409 /* 410 * Since sun_jnu_encoding is now hard-coded to UTF-8 on Mac, we don't 411 * want to use it to overwrite file.encoding 412 */ 413 PUTPROP(props, "file.encoding", sprops->encoding); 414 #else 415 PUTPROP(props, "file.encoding", sprops->sun_jnu_encoding); 416 #endif 417 } else { 418 (*env)->DeleteLocalRef(env, jVMVal); 419 } 420 421 return ret; 422 } 423 424 /* 425 * The following three functions implement setter methods for 426 * java.lang.System.{in, out, err}. They are natively implemented 427 * because they violate the semantics of the language (i.e. set final 428 * variable). 429 */ 430 JNIEXPORT void JNICALL 431 Java_java_lang_System_setIn0(JNIEnv *env, jclass cla, jobject stream) 432 { 433 jfieldID fid = 434 (*env)->GetStaticFieldID(env,cla,"in","Ljava/io/InputStream;"); 435 if (fid == 0) 436 return; 437 (*env)->SetStaticObjectField(env,cla,fid,stream); 438 } 439 440 JNIEXPORT void JNICALL 441 Java_java_lang_System_setOut0(JNIEnv *env, jclass cla, jobject stream) 442 { 443 jfieldID fid = 444 (*env)->GetStaticFieldID(env,cla,"out","Ljava/io/PrintStream;"); 445 if (fid == 0) 446 return; 447 (*env)->SetStaticObjectField(env,cla,fid,stream); 448 } 449 450 JNIEXPORT void JNICALL 451 Java_java_lang_System_setErr0(JNIEnv *env, jclass cla, jobject stream) 452 { 453 jfieldID fid = 454 (*env)->GetStaticFieldID(env,cla,"err","Ljava/io/PrintStream;"); 455 if (fid == 0) 456 return; 457 (*env)->SetStaticObjectField(env,cla,fid,stream); 458 } 459 460 static void cpchars(jchar *dst, char *src, int n) 461 { 462 int i; 463 for (i = 0; i < n; i++) { 464 dst[i] = src[i]; 465 } 466 } 467 468 JNIEXPORT jstring JNICALL 469 Java_java_lang_System_mapLibraryName(JNIEnv *env, jclass ign, jstring libname) 470 { 471 int len; 472 int prefix_len = (int) strlen(JNI_LIB_PREFIX); 473 int suffix_len = (int) strlen(JNI_LIB_SUFFIX); 474 475 jchar chars[256]; 476 if (libname == NULL) { 477 JNU_ThrowNullPointerException(env, 0); 478 return NULL; 479 } 480 len = (*env)->GetStringLength(env, libname); 481 if (len > 240) { 482 JNU_ThrowIllegalArgumentException(env, "name too long"); 483 return NULL; 484 } 485 cpchars(chars, JNI_LIB_PREFIX, prefix_len); 486 (*env)->GetStringRegion(env, libname, 0, len, chars + prefix_len); 487 len += prefix_len; 488 cpchars(chars + len, JNI_LIB_SUFFIX, suffix_len); 489 len += suffix_len; 490 491 return (*env)->NewString(env, chars, len); 492 }