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 #define LOG_TAG "libcore"
26
27 #include <stdlib.h>
28 #include <string.h>
29 #include <time.h>
30
31 #include <log/log.h>
32
33 #include "io_util.h"
34 #include "jni.h"
35 #include "jni_util.h"
36 #include "jvm.h"
37
38 #include "openssl/opensslv.h"
39 #include "zlib.h"
40 #include <nativehelper/JNIHelp.h>
41 #include <nativehelper/jni_macros.h>
42
43 #if defined(__ANDROID__)
44 void android_get_LD_LIBRARY_PATH(char*, size_t);
45 #endif
46
47 #define PUTPROP(props, key, val) \
48 if (1) { \
49 jstring jkey = (*env)->NewStringUTF(env, key); \
50 jstring jval = (*env)->NewStringUTF(env, val); \
51 jobject r = (*env)->CallObjectMethod(env, props, putID, jkey, jval); \
52 if ((*env)->ExceptionOccurred(env)) return NULL; \
53 (*env)->DeleteLocalRef(env, jkey); \
54 (*env)->DeleteLocalRef(env, jval); \
55 (*env)->DeleteLocalRef(env, r); \
56 } else ((void) 0)
57
58 /* "key" is a char type string with only ASCII character in it.
59 "val" is a nchar (typedefed in java_props.h) type string */
60
61 #define PUTPROP_ForPlatformNString(props, key, val) \
62 if (1) { \
63 jstring jkey = (*env)->NewStringUTF(env, key); \
64 jstring jval = GetStringPlatform(env, val); \
65 jobject r = (*env)->CallObjectMethod(env, props, putID, jkey, jval); \
66 if ((*env)->ExceptionOccurred(env)) return NULL; \
67 (*env)->DeleteLocalRef(env, jkey); \
68 (*env)->DeleteLocalRef(env, jval); \
69 (*env)->DeleteLocalRef(env, r); \
70 } else ((void) 0)
71 #define REMOVEPROP(props, key) \
72 if (1) { \
73 jstring jkey = JNU_NewStringPlatform(env, key); \
74 jobject r = (*env)->CallObjectMethod(env, props, removeID, jkey); \
75 if ((*env)->ExceptionOccurred(env)) return NULL; \
76 (*env)->DeleteLocalRef(env, jkey); \
77 (*env)->DeleteLocalRef(env, r); \
78 } else ((void) 0)
79 #define GETPROP(props, key, jret) \
80 if (1) { \
81 jstring jkey = JNU_NewStringPlatform(env, key); \
82 (jret) = (*env)->CallObjectMethod(env, props, getPropID, jkey); \
83 if ((*env)->ExceptionOccurred(env)) return NULL; \
84 (*env)->DeleteLocalRef(env, jkey); \
85 } else ((void) 0)
86
87 #ifndef VENDOR /* Third party may overwrite this. */
88 #define VENDOR "Oracle Corporation"
89 #define VENDOR_URL "http://java.oracle.com/"
90 #define VENDOR_URL_BUG "http://bugreport.sun.com/bugreport/"
91 #endif
92
93 #define JAVA_MAX_SUPPORTED_VERSION 51
94 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
95
96 #ifdef JAVA_SPECIFICATION_VENDOR /* Third party may NOT overwrite this. */
97 #error "ERROR: No override of JAVA_SPECIFICATION_VENDOR is allowed"
98 #else
99 #define JAVA_SPECIFICATION_VENDOR "Oracle Corporation"
100 #endif
101
102 /*
103 * The following three functions implement setter methods for
104 * java.lang.System.{in, out, err}. They are natively implemented
105 * because they violate the semantics of the language (i.e. set final
106 * variable).
107 */
108 JNIEXPORT void JNICALL
System_setIn0(JNIEnv * env,jclass cla,jobject stream)109 System_setIn0(JNIEnv *env, jclass cla, jobject stream)
110 {
111 jfieldID fid =
112 (*env)->GetStaticFieldID(env,cla,"in","Ljava/io/InputStream;");
113 if (fid == 0)
114 return;
115 (*env)->SetStaticObjectField(env,cla,fid,stream);
116 }
117
118 JNIEXPORT void JNICALL
System_setOut0(JNIEnv * env,jclass cla,jobject stream)119 System_setOut0(JNIEnv *env, jclass cla, jobject stream)
120 {
121 jfieldID fid =
122 (*env)->GetStaticFieldID(env,cla,"out","Ljava/io/PrintStream;");
123 if (fid == 0)
124 return;
125 (*env)->SetStaticObjectField(env,cla,fid,stream);
126 }
127
128 JNIEXPORT void JNICALL
System_setErr0(JNIEnv * env,jclass cla,jobject stream)129 System_setErr0(JNIEnv *env, jclass cla, jobject stream)
130 {
131 jfieldID fid =
132 (*env)->GetStaticFieldID(env,cla,"err","Ljava/io/PrintStream;");
133 if (fid == 0)
134 return;
135 (*env)->SetStaticObjectField(env,cla,fid,stream);
136 }
137
cpchars(jchar * dst,char * src,int n)138 static void cpchars(jchar *dst, char *src, int n)
139 {
140 int i;
141 for (i = 0; i < n; i++) {
142 dst[i] = src[i];
143 }
144 }
145
146 JNIEXPORT jstring JNICALL
System_mapLibraryName(JNIEnv * env,jclass ign,jstring libname)147 System_mapLibraryName(JNIEnv *env, jclass ign, jstring libname)
148 {
149 int len;
150 int prefix_len = (int) strlen(JNI_LIB_PREFIX);
151 int suffix_len = (int) strlen(JNI_LIB_SUFFIX);
152
153 jchar chars[256];
154 if (libname == NULL) {
155 JNU_ThrowNullPointerException(env, 0);
156 return NULL;
157 }
158 len = (*env)->GetStringLength(env, libname);
159 if (len > 240) {
160 JNU_ThrowIllegalArgumentException(env, "name too long");
161 return NULL;
162 }
163 cpchars(chars, JNI_LIB_PREFIX, prefix_len);
164 (*env)->GetStringRegion(env, libname, 0, len, chars + prefix_len);
165 len += prefix_len;
166 cpchars(chars + len, JNI_LIB_SUFFIX, suffix_len);
167 len += suffix_len;
168
169 return (*env)->NewString(env, chars, len);
170 }
171
System_specialProperties(JNIEnv * env,jclass ignored)172 static jobjectArray System_specialProperties(JNIEnv* env, jclass ignored) {
173 jclass stringClass = (*env)->FindClass(env, "java/lang/String");
174 jobjectArray result = (*env)->NewObjectArray(env, 4, stringClass, NULL);
175
176 char path[PATH_MAX];
177 char* process_path = getcwd(path, sizeof(path));
178 char user_dir[PATH_MAX + 10] = "user.dir=";
179 strncat(user_dir, process_path, PATH_MAX);
180 jstring user_dir_str = (*env)->NewStringUTF(env, user_dir);
181 if ((*env)->ExceptionCheck(env)) {
182 return NULL;
183 }
184 (*env)->SetObjectArrayElement(env, result, 0, user_dir_str);
185 if ((*env)->ExceptionCheck(env)) {
186 return NULL;
187 }
188 jstring zlib_str = (*env)->NewStringUTF(env, "android.zlib.version=" ZLIB_VERSION);
189 if ((*env)->ExceptionCheck(env)) {
190 return NULL;
191 }
192 (*env)->SetObjectArrayElement(env, result, 1, zlib_str);
193 if ((*env)->ExceptionCheck(env)) {
194 return NULL;
195 }
196 jstring ssl_str = (*env)->NewStringUTF(env, "android.openssl.version=" OPENSSL_VERSION_TEXT);
197 if ((*env)->ExceptionCheck(env)) {
198 return NULL;
199 }
200 (*env)->SetObjectArrayElement(env, result, 2, ssl_str);
201 if ((*env)->ExceptionCheck(env)) {
202 return NULL;
203 }
204
205
206 const char* library_path = getenv("LD_LIBRARY_PATH");
207 #if defined(__ANDROID__)
208 if (library_path == NULL) {
209 android_get_LD_LIBRARY_PATH(path, sizeof(path));
210 library_path = path;
211 }
212 #endif
213 if (library_path == NULL) {
214 library_path = "";
215 }
216 char* java_path = malloc(strlen("java.library.path=") + strlen(library_path) + 1);
217 strcpy(java_path, "java.library.path=");
218 strcat(java_path, library_path);
219 jstring java_path_str = (*env)->NewStringUTF(env, java_path);
220 free((void*)java_path);
221 if ((*env)->ExceptionCheck(env)) {
222 return NULL;
223 }
224 (*env)->SetObjectArrayElement(env, result, 3, java_path_str);
225 if ((*env)->ExceptionCheck(env)) {
226 return NULL;
227 }
228
229 return result;
230 }
231
System_log(JNIEnv * env,jclass ignored,jchar type,jstring javaMessage,jthrowable exception)232 static void System_log(JNIEnv* env, jclass ignored, jchar type, jstring javaMessage, jthrowable exception) {
233 int priority;
234 switch (type) {
235 case 'D': case 'd': priority = ANDROID_LOG_DEBUG; break;
236 case 'E': case 'e': priority = ANDROID_LOG_ERROR; break;
237 case 'F': case 'f': priority = ANDROID_LOG_FATAL; break;
238 case 'I': case 'i': priority = ANDROID_LOG_INFO; break;
239 case 'S': case 's': priority = ANDROID_LOG_SILENT; break;
240 case 'V': case 'v': priority = ANDROID_LOG_VERBOSE; break;
241 case 'W': case 'w': priority = ANDROID_LOG_WARN; break;
242 default: priority = ANDROID_LOG_DEFAULT; break;
243 }
244
245 WITH_PLATFORM_STRING(env, javaMessage, message) {
246 LOG_PRI(priority, "System", "%s", message);
247 } END_PLATFORM_STRING(env, message);
248
249 if (exception != NULL) {
250 jniLogException(env, priority, "System", exception);
251 }
252 }
253
System_nanoTime()254 static jlong System_nanoTime() {
255 struct timespec now;
256 clock_gettime(CLOCK_MONOTONIC, &now);
257 return now.tv_sec * 1000000000LL + now.tv_nsec;
258 }
259
System_currentTimeMillis()260 static jlong System_currentTimeMillis() {
261 return JVM_CurrentTimeMillis(NULL, NULL);
262 }
263
264 static JNINativeMethod gMethods[] = {
265 NATIVE_METHOD(System, mapLibraryName, "(Ljava/lang/String;)Ljava/lang/String;"),
266 NATIVE_METHOD(System, setErr0, "(Ljava/io/PrintStream;)V"),
267 NATIVE_METHOD(System, setOut0, "(Ljava/io/PrintStream;)V"),
268 NATIVE_METHOD(System, setIn0, "(Ljava/io/InputStream;)V"),
269 NATIVE_METHOD(System, specialProperties, "()[Ljava/lang/String;"),
270 NATIVE_METHOD(System, log, "(CLjava/lang/String;Ljava/lang/Throwable;)V"),
271 CRITICAL_NATIVE_METHOD(System, currentTimeMillis, "()J"),
272 CRITICAL_NATIVE_METHOD(System, nanoTime, "()J"),
273 };
274
register_java_lang_System(JNIEnv * env)275 void register_java_lang_System(JNIEnv* env) {
276 jniRegisterNativeMethods(env, "java/lang/System", gMethods, NELEM(gMethods));
277 }
278