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 static int fmtdefault; // boolean value 129 jobject fillI18nProps(JNIEnv *env, jobject props, char *baseKey, 130 char *platformDispVal, char *platformFmtVal, 131 jmethodID putID, jmethodID getPropID) { 132 jstring jVMBaseVal = NULL; 133 134 GETPROP(props, baseKey, jVMBaseVal); 135 if (jVMBaseVal) { 136 // user specified the base property. there's nothing to do here. 137 (*env)->DeleteLocalRef(env, jVMBaseVal); 138 } else { 139 char buf[64]; 140 jstring jVMVal = NULL; 141 const char *baseVal = ""; 142 143 /* user.xxx base property */ 144 if (fmtdefault) { 145 if (platformFmtVal) { 146 PUTPROP(props, baseKey, platformFmtVal); 147 baseVal = platformFmtVal; 148 } 149 } else { 150 if (platformDispVal) { 151 PUTPROP(props, baseKey, platformDispVal); 152 baseVal = platformDispVal; 153 } 154 } 155 156 /* user.xxx.display property */ 157 jio_snprintf(buf, sizeof(buf), "%s.display", baseKey); 158 GETPROP(props, buf, jVMVal); 159 if (jVMVal == NULL) { 160 if (platformDispVal && (strcmp(baseVal, platformDispVal) != 0)) { 161 PUTPROP(props, buf, platformDispVal); 162 } 163 } else { 164 (*env)->DeleteLocalRef(env, jVMVal); 165 } 166 167 /* user.xxx.format property */ 168 jio_snprintf(buf, sizeof(buf), "%s.format", baseKey); 169 GETPROP(props, buf, jVMVal); 170 if (jVMVal == NULL) { 171 if (platformFmtVal && (strcmp(baseVal, platformFmtVal) != 0)) { 172 PUTPROP(props, buf, platformFmtVal); 173 } 174 } else { 175 (*env)->DeleteLocalRef(env, jVMVal); 176 } 177 } 178 179 return NULL; 180 } 181 182 JNIEXPORT jobject JNICALL 183 Java_java_lang_System_initProperties(JNIEnv *env, jclass cla, jobject props) 184 { 185 char buf[128]; 186 java_props_t *sprops; 187 jmethodID putID, removeID, getPropID; 188 jobject ret = NULL; 189 jstring jVMVal = NULL; 190 191 if ((*env)->EnsureLocalCapacity(env, 50) < 0) { 192 return NULL; 193 } 194 sprops = GetJavaProperties(env); 195 CHECK_NULL_RETURN(sprops, NULL); 196 197 putID = (*env)->GetMethodID(env, 198 (*env)->GetObjectClass(env, props), 199 "put", 200 "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;"); 201 CHECK_NULL_RETURN(putID, NULL); 202 203 removeID = (*env)->GetMethodID(env, 204 (*env)->GetObjectClass(env, props), 205 "remove", 206 "(Ljava/lang/Object;)Ljava/lang/Object;"); 207 CHECK_NULL_RETURN(removeID, NULL); 208 209 getPropID = (*env)->GetMethodID(env, 210 (*env)->GetObjectClass(env, props), 211 "getProperty", 212 "(Ljava/lang/String;)Ljava/lang/String;"); 213 CHECK_NULL_RETURN(getPropID, NULL); 214 215 PUTPROP(props, "java.specification.version", 216 VERSION_SPECIFICATION); 217 PUTPROP(props, "java.specification.name", 218 "Java Platform API Specification"); 219 PUTPROP(props, "java.specification.vendor", 220 JAVA_SPECIFICATION_VENDOR); 221 222 PUTPROP(props, "java.version", VERSION_SHORT); 223 PUTPROP(props, "java.vendor", VENDOR); 224 PUTPROP(props, "java.vendor.url", VENDOR_URL); 225 PUTPROP(props, "java.vendor.url.bug", VENDOR_URL_BUG); 226 227 jio_snprintf(buf, sizeof(buf), "%d.%d", JVM_CLASSFILE_MAJOR_VERSION, 228 JVM_CLASSFILE_MINOR_VERSION); 229 PUTPROP(props, "java.class.version", buf); 230 231 if (sprops->awt_toolkit) { 232 PUTPROP(props, "awt.toolkit", sprops->awt_toolkit); 233 } 234 #ifdef MACOSX 235 if (sprops->awt_headless) { 236 PUTPROP(props, "java.awt.headless", sprops->awt_headless); 237 } 238 #endif 239 240 /* os properties */ 241 PUTPROP(props, "os.name", sprops->os_name); 242 PUTPROP(props, "os.version", sprops->os_version); 243 PUTPROP(props, "os.arch", sprops->os_arch); 244 245 #ifdef JDK_ARCH_ABI_PROP_NAME 246 PUTPROP(props, "sun.arch.abi", sprops->sun_arch_abi); 247 #endif 248 249 /* file system properties */ 250 PUTPROP(props, "file.separator", sprops->file_separator); 251 PUTPROP(props, "path.separator", sprops->path_separator); 252 PUTPROP(props, "line.separator", sprops->line_separator); 253 254 /* 255 * user.language 256 * user.script, user.country, user.variant (if user's environment specifies them) 257 * file.encoding 258 * file.encoding.pkg 259 */ 260 PUTPROP(props, "user.language", sprops->language); 261 if (sprops->script) { 262 PUTPROP(props, "user.script", sprops->script); 263 } 264 if (sprops->country) { 265 PUTPROP(props, "user.country", sprops->country); 266 } 267 if (sprops->variant) { 268 PUTPROP(props, "user.variant", sprops->variant); 269 } 270 PUTPROP(props, "file.encoding", sprops->encoding); 271 PUTPROP(props, "sun.jnu.encoding", sprops->sun_jnu_encoding); 272 if (sprops->sun_stdout_encoding != NULL) { 273 PUTPROP(props, "sun.stdout.encoding", sprops->sun_stdout_encoding); 274 } 275 if (sprops->sun_stderr_encoding != NULL) { 276 PUTPROP(props, "sun.stderr.encoding", sprops->sun_stderr_encoding); 277 } 278 PUTPROP(props, "file.encoding.pkg", "sun.io"); 279 280 /* unicode_encoding specifies the default endianness */ 281 PUTPROP(props, "sun.io.unicode.encoding", sprops->unicode_encoding); 282 PUTPROP(props, "sun.cpu.isalist", 283 (sprops->cpu_isalist ? sprops->cpu_isalist : "")); 284 PUTPROP(props, "sun.cpu.endian", sprops->cpu_endian); 285 286 287 #ifdef MACOSX 288 /* Proxy setting properties */ 289 if (sprops->httpProxyEnabled) { 290 PUTPROP(props, "http.proxyHost", sprops->httpHost); 291 PUTPROP(props, "http.proxyPort", sprops->httpPort); 292 } 293 294 if (sprops->httpsProxyEnabled) { 295 PUTPROP(props, "https.proxyHost", sprops->httpsHost); 296 PUTPROP(props, "https.proxyPort", sprops->httpsPort); 297 } 298 299 if (sprops->ftpProxyEnabled) { 300 PUTPROP(props, "ftp.proxyHost", sprops->ftpHost); 301 PUTPROP(props, "ftp.proxyPort", sprops->ftpPort); 302 } 303 304 if (sprops->socksProxyEnabled) { 305 PUTPROP(props, "socksProxyHost", sprops->socksHost); 306 PUTPROP(props, "socksProxyPort", sprops->socksPort); 307 } 308 309 if (sprops->gopherProxyEnabled) { 310 // The gopher client is different in that it expects an 'is this set?' flag that the others don't. 311 PUTPROP(props, "gopherProxySet", "true"); 312 PUTPROP(props, "gopherProxyHost", sprops->gopherHost); 313 PUTPROP(props, "gopherProxyPort", sprops->gopherPort); 314 } else { 315 PUTPROP(props, "gopherProxySet", "false"); 316 } 317 318 // Mac OS X only has a single proxy exception list which applies 319 // to all protocols 320 if (sprops->exceptionList) { 321 PUTPROP(props, "http.nonProxyHosts", sprops->exceptionList); 322 PUTPROP(props, "ftp.nonProxyHosts", sprops->exceptionList); 323 PUTPROP(props, "socksNonProxyHosts", sprops->exceptionList); 324 } 325 #endif 326 327 /* !!! DO NOT call PUTPROP_ForPlatformNString before this line !!! 328 * !!! I18n properties have not been set up yet !!! 329 */ 330 331 /* Printing properties */ 332 /* Note: java.awt.printerjob is an implementation private property which 333 * just happens to have a java.* name because it is referenced in 334 * a java.awt class. It is the mechanism by which the implementation 335 * finds the appropriate class in the JRE for the platform. 336 * It is explicitly not designed to be overridden by clients as 337 * a way of replacing the implementation class, and in any case 338 * the mechanism by which the class is loaded is constrained to only 339 * find and load classes that are part of the JRE. 340 * This property may be removed if that mechanism is redesigned 341 */ 342 PUTPROP(props, "java.awt.printerjob", sprops->printerJob); 343 344 /* data model */ 345 if (sizeof(sprops) == 4) { 346 sprops->data_model = "32"; 347 } else if (sizeof(sprops) == 8) { 348 sprops->data_model = "64"; 349 } else { 350 sprops->data_model = "unknown"; 351 } 352 PUTPROP(props, "sun.arch.data.model", \ 353 sprops->data_model); 354 355 /* patch level */ 356 PUTPROP(props, "sun.os.patch.level", \ 357 sprops->patch_level); 358 359 /* Java2D properties */ 360 /* Note: java.awt.graphicsenv is an implementation private property which 361 * just happens to have a java.* name because it is referenced in 362 * a java.awt class. It is the mechanism by which the implementation 363 * finds the appropriate class in the JRE for the platform. 364 * It is explicitly not designed to be overridden by clients as 365 * a way of replacing the implementation class, and in any case 366 * the mechanism by which the class is loaded is constrained to only 367 * find and load classes that are part of the JRE. 368 * This property may be removed if that mechanism is redesigned 369 */ 370 PUTPROP(props, "java.awt.graphicsenv", sprops->graphics_env); 371 if (sprops->font_dir != NULL) { 372 PUTPROP_ForPlatformNString(props, 373 "sun.java2d.fontpath", sprops->font_dir); 374 } 375 376 PUTPROP_ForPlatformNString(props, "java.io.tmpdir", sprops->tmp_dir); 377 378 PUTPROP_ForPlatformNString(props, "user.name", sprops->user_name); 379 PUTPROP_ForPlatformNString(props, "user.home", sprops->user_home); 380 381 PUTPROP(props, "user.timezone", sprops->timezone); 382 383 PUTPROP_ForPlatformNString(props, "user.dir", sprops->user_dir); 384 385 /* This is a sun. property as it is currently only set for Gnome and 386 * Windows desktops. 387 */ 388 if (sprops->desktop != NULL) { 389 PUTPROP(props, "sun.desktop", sprops->desktop); 390 } 391 392 /* 393 * unset "user.language", "user.script", "user.country", and "user.variant" 394 * in order to tell whether the command line option "-DXXXX=YYYY" is 395 * specified or not. They will be reset in fillI18nProps() below. 396 */ 397 REMOVEPROP(props, "user.language"); 398 REMOVEPROP(props, "user.script"); 399 REMOVEPROP(props, "user.country"); 400 REMOVEPROP(props, "user.variant"); 401 REMOVEPROP(props, "file.encoding"); 402 403 ret = JVM_InitProperties(env, props); 404 405 /* Check the compatibility flag */ 406 GETPROP(props, "sun.locale.formatasdefault", jVMVal); 407 if (jVMVal) { 408 const char * val = (*env)->GetStringUTFChars(env, jVMVal, 0); 409 CHECK_NULL_RETURN(val, NULL); 410 fmtdefault = !strcmp(val, "true"); 411 (*env)->ReleaseStringUTFChars(env, jVMVal, val); 412 (*env)->DeleteLocalRef(env, jVMVal); 413 } 414 415 /* reconstruct i18n related properties */ 416 fillI18nProps(env, props, "user.language", sprops->display_language, 417 sprops->format_language, putID, getPropID); 418 fillI18nProps(env, props, "user.script", 419 sprops->display_script, sprops->format_script, putID, getPropID); 420 fillI18nProps(env, props, "user.country", 421 sprops->display_country, sprops->format_country, putID, getPropID); 422 fillI18nProps(env, props, "user.variant", 423 sprops->display_variant, sprops->format_variant, putID, getPropID); 424 GETPROP(props, "file.encoding", jVMVal); 425 if (jVMVal == NULL) { 426 #ifdef MACOSX 427 /* 428 * Since sun_jnu_encoding is now hard-coded to UTF-8 on Mac, we don't 429 * want to use it to overwrite file.encoding 430 */ 431 PUTPROP(props, "file.encoding", sprops->encoding); 432 #else 433 if (fmtdefault) { 434 PUTPROP(props, "file.encoding", sprops->encoding); 435 } else { 436 PUTPROP(props, "file.encoding", sprops->sun_jnu_encoding); 437 } 438 #endif 439 } else { 440 (*env)->DeleteLocalRef(env, jVMVal); 441 } 442 443 return ret; 444 } 445 446 /* 447 * The following three functions implement setter methods for 448 * java.lang.System.{in, out, err}. They are natively implemented 449 * because they violate the semantics of the language (i.e. set final 450 * variable). 451 */ 452 JNIEXPORT void JNICALL 453 Java_java_lang_System_setIn0(JNIEnv *env, jclass cla, jobject stream) 454 { 455 jfieldID fid = 456 (*env)->GetStaticFieldID(env,cla,"in","Ljava/io/InputStream;"); 457 if (fid == 0) 458 return; 459 (*env)->SetStaticObjectField(env,cla,fid,stream); 460 } 461 462 JNIEXPORT void JNICALL 463 Java_java_lang_System_setOut0(JNIEnv *env, jclass cla, jobject stream) 464 { 465 jfieldID fid = 466 (*env)->GetStaticFieldID(env,cla,"out","Ljava/io/PrintStream;"); 467 if (fid == 0) 468 return; 469 (*env)->SetStaticObjectField(env,cla,fid,stream); 470 } 471 472 JNIEXPORT void JNICALL 473 Java_java_lang_System_setErr0(JNIEnv *env, jclass cla, jobject stream) 474 { 475 jfieldID fid = 476 (*env)->GetStaticFieldID(env,cla,"err","Ljava/io/PrintStream;"); 477 if (fid == 0) 478 return; 479 (*env)->SetStaticObjectField(env,cla,fid,stream); 480 } 481 482 static void cpchars(jchar *dst, char *src, int n) 483 { 484 int i; 485 for (i = 0; i < n; i++) { 486 dst[i] = src[i]; 487 } 488 } 489 490 JNIEXPORT jstring JNICALL 491 Java_java_lang_System_mapLibraryName(JNIEnv *env, jclass ign, jstring libname) 492 { 493 int len; 494 int prefix_len = (int) strlen(JNI_LIB_PREFIX); 495 int suffix_len = (int) strlen(JNI_LIB_SUFFIX); 496 497 jchar chars[256]; 498 if (libname == NULL) { 499 JNU_ThrowNullPointerException(env, 0); 500 return NULL; 501 } 502 len = (*env)->GetStringLength(env, libname); 503 if (len > 240) { 504 JNU_ThrowIllegalArgumentException(env, "name too long"); 505 return NULL; 506 } 507 cpchars(chars, JNI_LIB_PREFIX, prefix_len); 508 (*env)->GetStringRegion(env, libname, 0, len, chars + prefix_len); 509 len += prefix_len; 510 cpchars(chars + len, JNI_LIB_SUFFIX, suffix_len); 511 len += suffix_len; 512 513 return (*env)->NewString(env, chars, len); 514 }