1 /*

        2  * Copyright (c) 1994, 2010, 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 51

      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 

      210     /* os properties */

      211     PUTPROP(props, "os.name", sprops->os_name);

      212     PUTPROP(props, "os.version", sprops->os_version);

      213     PUTPROP(props, "os.arch", sprops->os_arch);

      214 

      215     /* file system properties */

      216     PUTPROP(props, "file.separator", sprops->file_separator);

      217     PUTPROP(props, "path.separator", sprops->path_separator);

      218     PUTPROP(props, "line.separator", sprops->line_separator);

      219 

      220     /*

      221      *  user.language

      222      *  user.script, user.country, user.variant (if user's environment specifies them)

      223      *  file.encoding

      224      *  file.encoding.pkg

      225      */

      226     PUTPROP(props, "user.language", sprops->language);

      227     if (sprops->script) {

      228         PUTPROP(props, "user.script", sprops->script);

      229     }

      230     if (sprops->country) {

      231         PUTPROP(props, "user.country", sprops->country);

      232     }

      233     if (sprops->variant) {

      234         PUTPROP(props, "user.variant", sprops->variant);

      235     }

      236     PUTPROP(props, "file.encoding", sprops->encoding);

      237     PUTPROP(props, "sun.jnu.encoding", sprops->sun_jnu_encoding);

      238     PUTPROP(props, "file.encoding.pkg", "sun.io");

      239     /* unicode_encoding specifies the default endianness */

      240     PUTPROP(props, "sun.io.unicode.encoding", sprops->unicode_encoding);

      241     PUTPROP(props, "sun.cpu.isalist",

      242             (sprops->cpu_isalist ? sprops->cpu_isalist : ""));

      243     PUTPROP(props, "sun.cpu.endian",  sprops->cpu_endian);

      244 

      245 

      246 #ifdef MACOSX

      247     /* Proxy setting properties */

      248     if (sprops->httpProxyEnabled) {

      249         PUTPROP(props, "http.proxyHost", sprops->httpHost);

      250         PUTPROP(props, "http.proxyPort", sprops->httpPort);

      251     }

      252 

      253     if (sprops->httpsProxyEnabled) {

      254         PUTPROP(props, "https.proxyHost", sprops->httpsHost);

      255         PUTPROP(props, "https.proxyPort", sprops->httpsPort);

      256     }

      257 

      258     if (sprops->ftpProxyEnabled) {

      259         PUTPROP(props, "ftp.proxyHost", sprops->ftpHost);

      260         PUTPROP(props, "ftp.proxyPort", sprops->ftpPort);

      261     }

      262 

      263     if (sprops->socksProxyEnabled) {

      264         PUTPROP(props, "socksProxyHost", sprops->socksHost);

      265         PUTPROP(props, "socksProxyPort", sprops->socksPort);

      266     }

      267 

      268     if (sprops->gopherProxyEnabled) {

      269         // The gopher client is different in that it expects an 'is this set?' flag that the others don't.

      270         PUTPROP(props, "gopherProxySet", "true");

      271         PUTPROP(props, "gopherProxyHost", sprops->gopherHost);

      272         PUTPROP(props, "gopherProxyPort", sprops->gopherPort);

      273     } else {

      274         PUTPROP(props, "gopherProxySet", "false");

      275     }

      276 

      277     // Mac OS X only has a single proxy exception list which applies

      278     // to all protocols

      279     if (sprops->exceptionList) {

      280         PUTPROP(props, "http.nonProxyHosts", sprops->exceptionList);

      281         // HTTPS: implementation in jsse.jar uses http.nonProxyHosts

      282         PUTPROP(props, "ftp.nonProxyHosts", sprops->exceptionList);

      283         PUTPROP(props, "socksNonProxyHosts", sprops->exceptionList);

      284     }

      285 #endif

      286 

      287     /* !!! DO NOT call PUTPROP_ForPlatformNString before this line !!!

      288      * !!! I18n properties have not been set up yet !!!

      289      */

      290 

      291     /* Printing properties */

      292     /* Note: java.awt.printerjob is an implementation private property which

      293      * just happens to have a java.* name because it is referenced in

      294      * a java.awt class. It is the mechanism by which the implementation

      295      * finds the appropriate class in the JRE for the platform.

      296      * It is explicitly not designed to be overridden by clients as

      297      * a way of replacing the implementation class, and in any case

      298      * the mechanism by which the class is loaded is constrained to only

      299      * find and load classes that are part of the JRE.

      300      * This property may be removed if that mechanism is redesigned

      301      */

      302     PUTPROP(props, "java.awt.printerjob", sprops->printerJob);

      303 

      304     /* data model */

      305     if (sizeof(sprops) == 4) {

      306         sprops->data_model = "32";

      307     } else if (sizeof(sprops) == 8) {

      308         sprops->data_model = "64";

      309     } else {

      310         sprops->data_model = "unknown";

      311     }

      312     PUTPROP(props, "sun.arch.data.model",  \

      313                     sprops->data_model);

      314 

      315     /* patch level */

      316     PUTPROP(props, "sun.os.patch.level",  \

      317                     sprops->patch_level);

      318 

      319     /* Java2D properties */

      320     /* Note: java.awt.graphicsenv is an implementation private property which

      321      * just happens to have a java.* name because it is referenced in

      322      * a java.awt class. It is the mechanism by which the implementation

      323      * finds the appropriate class in the JRE for the platform.

      324      * It is explicitly not designed to be overridden by clients as

      325      * a way of replacing the implementation class, and in any case

      326      * the mechanism by which the class is loaded is constrained to only

      327      * find and load classes that are part of the JRE.

      328      * This property may be removed if that mechanism is redesigned

      329      */

      330     PUTPROP(props, "java.awt.graphicsenv", sprops->graphics_env);

      331     if (sprops->font_dir != NULL) {

      332         PUTPROP_ForPlatformNString(props,

      333                                    "sun.java2d.fontpath", sprops->font_dir);

      334     }

      335 

      336     PUTPROP_ForPlatformNString(props, "java.io.tmpdir", sprops->tmp_dir);

      337 

      338     PUTPROP_ForPlatformNString(props, "user.name", sprops->user_name);

      339     PUTPROP_ForPlatformNString(props, "user.home", sprops->user_home);

      340 

      341     PUTPROP(props, "user.timezone", sprops->timezone);

      342 

      343     PUTPROP_ForPlatformNString(props, "user.dir", sprops->user_dir);

      344 

      345     /* This is a sun. property as it is currently only set for Gnome and

      346      * Windows desktops.

      347      */

      348     if (sprops->desktop != NULL) {

      349         PUTPROP(props, "sun.desktop", sprops->desktop);

      350     }

      351 

      352     /*

      353      * unset "user.language", "user.script", "user.country", and "user.variant"

      354      * in order to tell whether the command line option "-DXXXX=YYYY" is

      355      * specified or not.  They will be reset in fillI18nProps() below.

      356      */

      357     REMOVEPROP(props, "user.language");

      358     REMOVEPROP(props, "user.script");

      359     REMOVEPROP(props, "user.country");

      360     REMOVEPROP(props, "user.variant");

      361     REMOVEPROP(props, "file.encoding");

      362 

      363     ret = JVM_InitProperties(env, props);

      364 

      365     /* Check the compatibility flag */

      366     GETPROP(props, "sun.locale.formatasdefault", jVMVal);

      367     if (jVMVal) {

      368         const char * val = (*env)->GetStringUTFChars(env, jVMVal, 0);

      369         fmtdefault = !strcmp(val, "true");

      370         (*env)->ReleaseStringUTFChars(env, jVMVal, val);

      371         (*env)->DeleteLocalRef(env, jVMVal);

      372     }

      373 

      374     /* reconstruct i18n related properties */

      375     fillI18nProps(env, props, "user.language", sprops->display_language,

      376         sprops->format_language, putID, getPropID);

      377     fillI18nProps(env, props, "user.script",

      378         sprops->display_script, sprops->format_script, putID, getPropID);

      379     fillI18nProps(env, props, "user.country",

      380         sprops->display_country, sprops->format_country, putID, getPropID);

      381     fillI18nProps(env, props, "user.variant",

      382         sprops->display_variant, sprops->format_variant, putID, getPropID);

      383     GETPROP(props, "file.encoding", jVMVal);

      384     if (jVMVal == NULL) {

      385         if (fmtdefault) {

      386             PUTPROP(props, "file.encoding", sprops->encoding);

      387         } else {

      388             PUTPROP(props, "file.encoding", sprops->sun_jnu_encoding);

      389         }

      390     } else {

      391         (*env)->DeleteLocalRef(env, jVMVal);

      392     }

      393 

      394     return ret;

      395 }

      396 

      397 /*

      398  * The following three functions implement setter methods for

      399  * java.lang.System.{in, out, err}. They are natively implemented

      400  * because they violate the semantics of the language (i.e. set final

      401  * variable).

      402  */

      403 JNIEXPORT void JNICALL

      404 Java_java_lang_System_setIn0(JNIEnv *env, jclass cla, jobject stream)

      405 {

      406     jfieldID fid =

      407         (*env)->GetStaticFieldID(env,cla,"in","Ljava/io/InputStream;");

      408     if (fid == 0)

      409         return;

      410     (*env)->SetStaticObjectField(env,cla,fid,stream);

      411 }

      412 

      413 JNIEXPORT void JNICALL

      414 Java_java_lang_System_setOut0(JNIEnv *env, jclass cla, jobject stream)

      415 {

      416     jfieldID fid =

      417         (*env)->GetStaticFieldID(env,cla,"out","Ljava/io/PrintStream;");

      418     if (fid == 0)

      419         return;

      420     (*env)->SetStaticObjectField(env,cla,fid,stream);

      421 }

      422 

      423 JNIEXPORT void JNICALL

      424 Java_java_lang_System_setErr0(JNIEnv *env, jclass cla, jobject stream)

      425 {

      426     jfieldID fid =

      427         (*env)->GetStaticFieldID(env,cla,"err","Ljava/io/PrintStream;");

      428     if (fid == 0)

      429         return;

      430     (*env)->SetStaticObjectField(env,cla,fid,stream);

      431 }

      432 

      433 static void cpchars(jchar *dst, char *src, int n)

      434 {

      435     int i;

      436     for (i = 0; i < n; i++) {

      437         dst[i] = src[i];

      438     }

      439 }

      440 

      441 JNIEXPORT jstring JNICALL

      442 Java_java_lang_System_mapLibraryName(JNIEnv *env, jclass ign, jstring libname)

      443 {

      444     int len;

      445     int prefix_len = (int) strlen(JNI_LIB_PREFIX);

      446     int suffix_len = (int) strlen(JNI_LIB_SUFFIX);

      447 

      448     jchar chars[256];

      449     if (libname == NULL) {

      450         JNU_ThrowNullPointerException(env, 0);

      451         return NULL;

      452     }

      453     len = (*env)->GetStringLength(env, libname);

      454     if (len > 240) {

      455         JNU_ThrowIllegalArgumentException(env, "name too long");

      456         return NULL;

      457     }

      458     cpchars(chars, JNI_LIB_PREFIX, prefix_len);

      459     (*env)->GetStringRegion(env, libname, 0, len, chars + prefix_len);

      460     len += prefix_len;

      461     cpchars(chars + len, JNI_LIB_SUFFIX, suffix_len);

      462     len += suffix_len;

      463 

      464     return (*env)->NewString(env, chars, len);

      465 }