1 /*
2 * Copyright (c) 1994, 2024, 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 #include "jdk_internal_util_SystemProps_Raw.h"
35
36 #define OBJ "Ljava/lang/Object;"
37
38 /* Only register the performance-critical methods */
39 static JNINativeMethod methods[] = {
40 {"currentTimeMillis", "()J", (void *)&JVM_CurrentTimeMillis},
41 {"nanoTime", "()J", (void *)&JVM_NanoTime},
42 {"arraycopy", "(" OBJ "I" OBJ "II)V", (void *)&JVM_ArrayCopy},
43 };
44
45 #undef OBJ
46
47 JNIEXPORT void JNICALL
48 Java_java_lang_System_registerNatives(JNIEnv *env, jclass cls)
49 {
50 (*env)->RegisterNatives(env, cls,
51 methods, sizeof(methods)/sizeof(methods[0]));
52 }
53
54 JNIEXPORT jint JNICALL
55 Java_java_lang_System_identityHashCode(JNIEnv *env, jobject this, jobject x)
56 {
57 return JVM_IHashCode(env, x);
58 }
59
60 /* VENDOR, VENDOR_URL, VENDOR_URL_BUG are set in VersionProps.java.template. */
61
62 /*
63 * Store the UTF-8 string encoding of the value in the array
64 * at the index if the value is non-null. Store nothing if the value is null.
65 * On any error, return from Java_jdk_internal_util_SystemProps_00024Raw_platformProperties.
66 */
67 #define PUTPROP(array, prop_index, val) \
68 if (val != NULL) { \
69 jstring jval = (*env)->NewStringUTF(env, val); \
70 if (jval == NULL) \
71 return NULL; \
72 (*env)->SetObjectArrayElement(env, array, jdk_internal_util_SystemProps_Raw_##prop_index, jval); \
73 if ((*env)->ExceptionCheck(env)) \
74 return NULL; \
75 (*env)->DeleteLocalRef(env, jval); \
76 }
77
78 /*
79 * Store the Platform string encoding of the value in the array
80 * at the index if the value is non-null. Store nothing if the value is null.
81 * On any error, return from Java_jdk_internal_util_SystemProps_00024Raw_platformProperties.
82 */
83 #define PUTPROP_PlatformString(array, prop_index, val) \
84 if (val != NULL) { \
85 jstring jval = GetStringPlatform(env, val); \
86 if (jval == NULL) \
87 return NULL; \
88 (*env)->SetObjectArrayElement(env, array, jdk_internal_util_SystemProps_Raw_##prop_index, jval); \
89 if ((*env)->ExceptionCheck(env)) \
90 return NULL; \
91 (*env)->DeleteLocalRef(env, jval); \
92 }
93
94 /*
95 * Gather the system properties and return as a String[].
96 * The first FIXED_LENGTH entries are the platform defined property values, no names.
97 * The remaining array indices are alternating key/value pairs
98 * supplied by the VM including those defined on the command line
99 * using -Dkey=value that may override the platform defined value.
100 * The caller is responsible for replacing platform provided values as needed.
101 *
102 * Class: jdk_internal_util_SystemProps_Raw
103 * Method: platformProperties
104 * Signature: ()[Ljava/lang/String;
105 */
106 JNIEXPORT jobjectArray JNICALL
107 Java_jdk_internal_util_SystemProps_00024Raw_platformProperties(JNIEnv *env, jclass cla)
108 {
109 java_props_t *sprops;
110 jobject propArray = NULL;
111 jclass classString;
112 int nstrings = jdk_internal_util_SystemProps_Raw_FIXED_LENGTH;
113
114 // Get the platform specific values
115 sprops = GetJavaProperties(env);
116 CHECK_NULL_RETURN(sprops, NULL);
117
118 /*
119 * !!! DO NOT call PUTPROP_PlatformString (NewStringPlatform) before this line !!!
120 */
121 InitializeEncoding(env, sprops->sun_jnu_encoding);
122
123 // Ensure capacity for the array and for a string for each fixed length element
124 if ((*env)->EnsureLocalCapacity(env, nstrings + 2) < 0) {
125 return NULL;
126 }
127
128 // Allocate an array of String for all the well known props
129 classString = JNU_ClassString(env);
130 CHECK_NULL_RETURN(classString, NULL);
131
132 propArray = (*env)->NewObjectArray(env, nstrings, classString, NULL);
133 CHECK_NULL_RETURN(propArray, NULL);
134
135 /* os properties */
136 PUTPROP(propArray, _os_name_NDX, sprops->os_name);
137 PUTPROP(propArray, _os_version_NDX, sprops->os_version);
138 PUTPROP(propArray, _os_arch_NDX, sprops->os_arch);
139
140 #ifdef JDK_ARCH_ABI_PROP_NAME
141 PUTPROP(propArray, _sun_arch_abi_NDX, sprops->sun_arch_abi);
142 #endif
143
144 /* file system properties */
145 PUTPROP(propArray, _file_separator_NDX, sprops->file_separator);
146 PUTPROP(propArray, _path_separator_NDX, sprops->path_separator);
147 PUTPROP(propArray, _line_separator_NDX, sprops->line_separator);
148
149 #ifdef MACOSX
150 /*
151 * Since sun_jnu_encoding is now hard-coded to UTF-8 on Mac, we don't
152 * want to use it to overwrite file.encoding
153 */
154 PUTPROP(propArray, _file_encoding_NDX, sprops->encoding);
155 #else
156 PUTPROP(propArray, _file_encoding_NDX, sprops->sun_jnu_encoding);
157 #endif
158 PUTPROP(propArray, _sun_jnu_encoding_NDX, sprops->sun_jnu_encoding);
159
160 /*
161 * file encoding for stdout and stderr
162 */
163 PUTPROP(propArray, _stdout_encoding_NDX, sprops->stdout_encoding);
164 PUTPROP(propArray, _stderr_encoding_NDX, sprops->stderr_encoding);
165
166 /* unicode_encoding specifies the default endianness */
167 PUTPROP(propArray, _sun_io_unicode_encoding_NDX, sprops->unicode_encoding);
168 PUTPROP(propArray, _sun_cpu_endian_NDX, sprops->cpu_endian);
169 PUTPROP(propArray, _sun_cpu_isalist_NDX, sprops->cpu_isalist);
170
171 #ifdef MACOSX
172 /* Proxy setting properties */
173 if (sprops->httpProxyEnabled) {
174 PUTPROP(propArray, _http_proxyHost_NDX, sprops->httpHost);
175 PUTPROP(propArray, _http_proxyPort_NDX, sprops->httpPort);
176 }
177
178 if (sprops->httpsProxyEnabled) {
179 PUTPROP(propArray, _https_proxyHost_NDX, sprops->httpsHost);
180 PUTPROP(propArray, _https_proxyPort_NDX, sprops->httpsPort);
181 }
182
183 if (sprops->ftpProxyEnabled) {
184 PUTPROP(propArray, _ftp_proxyHost_NDX, sprops->ftpHost);
185 PUTPROP(propArray, _ftp_proxyPort_NDX, sprops->ftpPort);
186 }
187
188 if (sprops->socksProxyEnabled) {
189 PUTPROP(propArray, _socksProxyHost_NDX, sprops->socksHost);
190 PUTPROP(propArray, _socksProxyPort_NDX, sprops->socksPort);
191 }
192
193 // Mac OS X only has a single proxy exception list which applies
194 // to all protocols
195 if (sprops->exceptionList) {
196 PUTPROP(propArray, _http_nonProxyHosts_NDX, sprops->exceptionList);
197 PUTPROP(propArray, _ftp_nonProxyHosts_NDX, sprops->exceptionList);
198 PUTPROP(propArray, _socksNonProxyHosts_NDX, sprops->exceptionList);
199 }
200 #endif
201
202 /* data model */
203 if (sizeof(sprops) == 4) {
204 sprops->data_model = "32";
205 } else if (sizeof(sprops) == 8) {
206 sprops->data_model = "64";
207 } else {
208 sprops->data_model = "unknown";
209 }
210 PUTPROP(propArray, _sun_arch_data_model_NDX, sprops->data_model);
211
212 /* patch level */
213 PUTPROP(propArray, _sun_os_patch_level_NDX, sprops->patch_level);
214
215 PUTPROP_PlatformString(propArray, _java_io_tmpdir_NDX, sprops->tmp_dir);
216
217 PUTPROP_PlatformString(propArray, _user_name_NDX, sprops->user_name);
218 PUTPROP_PlatformString(propArray, _user_home_NDX, sprops->user_home);
219 PUTPROP_PlatformString(propArray, _user_dir_NDX, sprops->user_dir);
220
221 /*
222 * Set i18n related property fields from platform.
223 */
224 PUTPROP(propArray, _display_language_NDX, sprops->display_language);
225 PUTPROP(propArray, _display_script_NDX, sprops->display_script);
226 PUTPROP(propArray, _display_country_NDX, sprops->display_country);
227 PUTPROP(propArray, _display_variant_NDX, sprops->display_variant);
228
229 PUTPROP(propArray, _format_language_NDX, sprops->format_language);
230 PUTPROP(propArray, _format_script_NDX, sprops->format_script);
231 PUTPROP(propArray, _format_country_NDX, sprops->format_country);
232 PUTPROP(propArray, _format_variant_NDX, sprops->format_variant);
233
234 return propArray;
235 }
236
237 /*
238 * Gather the VM and command line properties and return as a String[].
239 * The array indices are alternating key/value pairs
240 * supplied by the VM including those defined on the command line
241 * using -Dkey=value that may override the platform defined value.
242 *
243 * Note: The platform encoding must have been set.
244 *
245 * Class: jdk_internal_util_SystemProps_Raw
246 * Method: vmProperties
247 * Signature: ()[Ljava/lang/String;
248 */
249 JNIEXPORT jobjectArray JNICALL
250 Java_jdk_internal_util_SystemProps_00024Raw_vmProperties(JNIEnv *env, jclass cla)
251 {
252 jobjectArray cmdProps = JVM_GetProperties(env);
253 return cmdProps;
254 }
255
256 /*
257 * The following three functions implement setter methods for
258 * java.lang.System.{in, out, err}. They are natively implemented
259 * because they violate the semantics of the language (i.e. set final
260 * variable).
261 */
262 JNIEXPORT void JNICALL
263 Java_java_lang_System_setIn0(JNIEnv *env, jclass cla, jobject stream)
264 {
265 jfieldID fid =
266 (*env)->GetStaticFieldID(env,cla,"in","Ljava/io/InputStream;");
267 if (fid == 0)
268 return;
269 (*env)->SetStaticObjectField(env,cla,fid,stream);
270 }
271
272 JNIEXPORT void JNICALL
273 Java_java_lang_System_setOut0(JNIEnv *env, jclass cla, jobject stream)
274 {
275 jfieldID fid =
276 (*env)->GetStaticFieldID(env,cla,"out","Ljava/io/PrintStream;");
277 if (fid == 0)
278 return;
279 (*env)->SetStaticObjectField(env,cla,fid,stream);
280 }
281
282 JNIEXPORT void JNICALL
283 Java_java_lang_System_setErr0(JNIEnv *env, jclass cla, jobject stream)
284 {
285 jfieldID fid =
286 (*env)->GetStaticFieldID(env,cla,"err","Ljava/io/PrintStream;");
287 if (fid == 0)
288 return;
289 (*env)->SetStaticObjectField(env,cla,fid,stream);
290 }
291
292 static void cpchars(jchar *dst, char *src, int n)
293 {
294 int i;
295 for (i = 0; i < n; i++) {
296 dst[i] = src[i];
297 }
298 }
299
300 JNIEXPORT jstring JNICALL
301 Java_java_lang_System_mapLibraryName(JNIEnv *env, jclass ign, jstring libname)
302 {
303 int len;
304 int prefix_len = (int) strlen(JNI_LIB_PREFIX);
305 int suffix_len = (int) strlen(JNI_LIB_SUFFIX);
306
307 jchar chars[256];
308 if (libname == NULL) {
309 JNU_ThrowNullPointerException(env, 0);
310 return NULL;
311 }
312 len = (*env)->GetStringLength(env, libname);
313 if (len > 240) {
314 JNU_ThrowIllegalArgumentException(env, "name too long");
315 return NULL;
316 }
317 cpchars(chars, JNI_LIB_PREFIX, prefix_len);
318 (*env)->GetStringRegion(env, libname, 0, len, chars + prefix_len);
319 len += prefix_len;
320 cpchars(chars + len, JNI_LIB_SUFFIX, suffix_len);
321 len += suffix_len;
322
323 return (*env)->NewString(env, chars, len);
324 }