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.vendor", VENDOR); 215 PUTPROP(props, "java.vendor.url", VENDOR_URL); 216 PUTPROP(props, "java.vendor.url.bug", VENDOR_URL_BUG); 217 218 jio_snprintf(buf, sizeof(buf), "%d.%d", JVM_CLASSFILE_MAJOR_VERSION, 219 JVM_CLASSFILE_MINOR_VERSION); 220 PUTPROP(props, "java.class.version", buf); 221 222 if (sprops->awt_toolkit) { 223 PUTPROP(props, "awt.toolkit", sprops->awt_toolkit); 224 } 225 #ifdef MACOSX 226 if (sprops->awt_headless) { 227 PUTPROP(props, "java.awt.headless", sprops->awt_headless); 228 } 229 #endif 230 231 /* os properties */ 232 PUTPROP(props, "os.name", sprops->os_name); 233 PUTPROP(props, "os.version", sprops->os_version); 234 PUTPROP(props, "os.arch", sprops->os_arch); 235 236 #ifdef JDK_ARCH_ABI_PROP_NAME 237 PUTPROP(props, "sun.arch.abi", sprops->sun_arch_abi); 238 #endif 239 240 /* file system properties */ 241 PUTPROP(props, "file.separator", sprops->file_separator); 242 PUTPROP(props, "path.separator", sprops->path_separator); 243 PUTPROP(props, "line.separator", sprops->line_separator); 244 245 /* 246 * file encoding for stdout and stderr 247 */ 248 if (sprops->sun_stdout_encoding != NULL) { 249 PUTPROP(props, "sun.stdout.encoding", sprops->sun_stdout_encoding); 250 } 251 if (sprops->sun_stderr_encoding != NULL) { 252 PUTPROP(props, "sun.stderr.encoding", sprops->sun_stderr_encoding); 253 } 254 255 /* unicode_encoding specifies the default endianness */ 256 PUTPROP(props, "sun.io.unicode.encoding", sprops->unicode_encoding); 257 if (sprops->cpu_isalist != NULL) { 258 // leave undefined if none 259 PUTPROP(props, "sun.cpu.isalist", sprops->cpu_isalist); 260 } 261 PUTPROP(props, "sun.cpu.endian", sprops->cpu_endian); 262 263 264 #ifdef MACOSX 265 /* Proxy setting properties */ 266 if (sprops->httpProxyEnabled) { 267 PUTPROP(props, "http.proxyHost", sprops->httpHost); 268 PUTPROP(props, "http.proxyPort", sprops->httpPort); 269 } 270 271 if (sprops->httpsProxyEnabled) { 272 PUTPROP(props, "https.proxyHost", sprops->httpsHost); 273 PUTPROP(props, "https.proxyPort", sprops->httpsPort); 274 } 275 276 if (sprops->ftpProxyEnabled) { 277 PUTPROP(props, "ftp.proxyHost", sprops->ftpHost); 278 PUTPROP(props, "ftp.proxyPort", sprops->ftpPort); 279 } 280 281 if (sprops->socksProxyEnabled) { 282 PUTPROP(props, "socksProxyHost", sprops->socksHost); 283 PUTPROP(props, "socksProxyPort", sprops->socksPort); 284 } 285 286 if (sprops->gopherProxyEnabled) { 287 // The gopher client is different in that it expects an 'is this set?' flag that the others don't. 288 PUTPROP(props, "gopherProxySet", "true"); 289 PUTPROP(props, "gopherProxyHost", sprops->gopherHost); 290 PUTPROP(props, "gopherProxyPort", sprops->gopherPort); 291 } else { 292 PUTPROP(props, "gopherProxySet", "false"); 293 } 294 295 // Mac OS X only has a single proxy exception list which applies 296 // to all protocols 297 if (sprops->exceptionList) { 298 PUTPROP(props, "http.nonProxyHosts", sprops->exceptionList); 299 PUTPROP(props, "ftp.nonProxyHosts", sprops->exceptionList); 300 PUTPROP(props, "socksNonProxyHosts", sprops->exceptionList); 301 } 302 #endif 303 304 /* !!! DO NOT call PUTPROP_ForPlatformNString before this line !!! 305 * !!! The platform native encoding for strings has not been set up yet !!! 306 */ 307 InitializeEncoding(env, sprops->sun_jnu_encoding); 308 309 /* Printing properties */ 310 /* Note: java.awt.printerjob is an implementation private property which 311 * just happens to have a java.* name because it is referenced in 312 * a java.awt class. It is the mechanism by which the implementation 313 * finds the appropriate class in the JRE for the platform. 314 * It is explicitly not designed to be overridden by clients as 315 * a way of replacing the implementation class, and in any case 316 * the mechanism by which the class is loaded is constrained to only 317 * find and load classes that are part of the JRE. 318 * This property may be removed if that mechanism is redesigned 319 */ 320 PUTPROP(props, "java.awt.printerjob", sprops->printerJob); 321 322 /* data model */ 323 if (sizeof(sprops) == 4) { 324 sprops->data_model = "32"; 325 } else if (sizeof(sprops) == 8) { 326 sprops->data_model = "64"; 327 } else { 328 sprops->data_model = "unknown"; 329 } 330 PUTPROP(props, "sun.arch.data.model", \ 331 sprops->data_model); 332 333 /* patch level */ 334 if (sprops->patch_level != NULL) { 335 PUTPROP(props, "sun.os.patch.level", \ 336 sprops->patch_level); 337 } 338 339 /* Java2D properties */ 340 /* Note: java.awt.graphicsenv is an implementation private property which 341 * just happens to have a java.* name because it is referenced in 342 * a java.awt class. It is the mechanism by which the implementation 343 * finds the appropriate class in the JRE for the platform. 344 * It is explicitly not designed to be overridden by clients as 345 * a way of replacing the implementation class, and in any case 346 * the mechanism by which the class is loaded is constrained to only 347 * find and load classes that are part of the JRE. 348 * This property may be removed if that mechanism is redesigned 349 */ 350 PUTPROP(props, "java.awt.graphicsenv", sprops->graphics_env); 351 if (sprops->font_dir != NULL) { 352 PUTPROP_ForPlatformNString(props, 353 "sun.java2d.fontpath", sprops->font_dir); 354 } 355 356 PUTPROP_ForPlatformNString(props, "java.io.tmpdir", sprops->tmp_dir); 357 358 PUTPROP_ForPlatformNString(props, "user.name", sprops->user_name); 359 PUTPROP_ForPlatformNString(props, "user.home", sprops->user_home); 360 PUTPROP_ForPlatformNString(props, "user.dir", sprops->user_dir); 361 362 /* This is a sun. property as it is currently only set for Gnome and 363 * Windows desktops. 364 */ 365 if (sprops->desktop != NULL) { 366 PUTPROP(props, "sun.desktop", sprops->desktop); 367 } 368 369 ret = JVM_InitProperties(env, props); 370 371 /* reconstruct i18n related properties */ 372 fillI18nProps(env, props, "user.language", sprops->display_language, 373 sprops->format_language, putID, getPropID); 374 fillI18nProps(env, props, "user.script", 375 sprops->display_script, sprops->format_script, putID, getPropID); 376 fillI18nProps(env, props, "user.country", 377 sprops->display_country, sprops->format_country, putID, getPropID); 378 fillI18nProps(env, props, "user.variant", 379 sprops->display_variant, sprops->format_variant, putID, getPropID); 380 GETPROP(props, "file.encoding", jVMVal); 381 if (jVMVal == NULL) { 382 #ifdef MACOSX 383 /* 384 * Since sun_jnu_encoding is now hard-coded to UTF-8 on Mac, we don't 385 * want to use it to overwrite file.encoding 386 */ 387 PUTPROP(props, "file.encoding", sprops->encoding); 388 #else 389 PUTPROP(props, "file.encoding", sprops->sun_jnu_encoding); 390 #endif 391 } else { 392 (*env)->DeleteLocalRef(env, jVMVal); 393 } 394 395 // Platform defined encoding properties override any on the command line 396 PUTPROP(props, "sun.jnu.encoding", sprops->sun_jnu_encoding); 397 398 return ret; 399 } 400 401 /* 402 * The following three functions implement setter methods for 403 * java.lang.System.{in, out, err}. They are natively implemented 404 * because they violate the semantics of the language (i.e. set final 405 * variable). 406 */ 407 JNIEXPORT void JNICALL 408 Java_java_lang_System_setIn0(JNIEnv *env, jclass cla, jobject stream) 409 { 410 jfieldID fid = 411 (*env)->GetStaticFieldID(env,cla,"in","Ljava/io/InputStream;"); 412 if (fid == 0) 413 return; 414 (*env)->SetStaticObjectField(env,cla,fid,stream); 415 } 416 417 JNIEXPORT void JNICALL 418 Java_java_lang_System_setOut0(JNIEnv *env, jclass cla, jobject stream) 419 { 420 jfieldID fid = 421 (*env)->GetStaticFieldID(env,cla,"out","Ljava/io/PrintStream;"); 422 if (fid == 0) 423 return; 424 (*env)->SetStaticObjectField(env,cla,fid,stream); 425 } 426 427 JNIEXPORT void JNICALL 428 Java_java_lang_System_setErr0(JNIEnv *env, jclass cla, jobject stream) 429 { 430 jfieldID fid = 431 (*env)->GetStaticFieldID(env,cla,"err","Ljava/io/PrintStream;"); 432 if (fid == 0) 433 return; 434 (*env)->SetStaticObjectField(env,cla,fid,stream); 435 } 436 437 static void cpchars(jchar *dst, char *src, int n) 438 { 439 int i; 440 for (i = 0; i < n; i++) { 441 dst[i] = src[i]; 442 } 443 } 444 445 JNIEXPORT jstring JNICALL 446 Java_java_lang_System_mapLibraryName(JNIEnv *env, jclass ign, jstring libname) 447 { 448 int len; 449 int prefix_len = (int) strlen(JNI_LIB_PREFIX); 450 int suffix_len = (int) strlen(JNI_LIB_SUFFIX); 451 452 jchar chars[256]; 453 if (libname == NULL) { 454 JNU_ThrowNullPointerException(env, 0); 455 return NULL; 456 } 457 len = (*env)->GetStringLength(env, libname); 458 if (len > 240) { 459 JNU_ThrowIllegalArgumentException(env, "name too long"); 460 return NULL; 461 } 462 cpchars(chars, JNI_LIB_PREFIX, prefix_len); 463 (*env)->GetStringRegion(env, libname, 0, len, chars + prefix_len); 464 len += prefix_len; 465 cpchars(chars + len, JNI_LIB_SUFFIX, suffix_len); 466 len += suffix_len; 467 468 return (*env)->NewString(env, chars, len); 469 }