1 /* 2 * Copyright (c) 2000, 2005, 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 <stdio.h> 27 #include <dlfcn.h> 28 #include <string.h> 29 #include <stdlib.h> 30 #include <jni.h> 31 #include <jni_util.h> 32 #include <jvm.h> 33 #include "gdefs.h" 34 35 #include <sys/param.h> 36 #include <sys/utsname.h> 37 38 #include "awt_Plugin.h" 39 40 #ifdef DEBUG 41 #define VERBOSE_AWT_DEBUG 42 #endif 43 44 static void *awtHandle = NULL; 45 46 typedef JNIEXPORT jint JNICALL JNI_OnLoad_type(JavaVM *vm, void *reserved); 47 48 /* Initialize the Java VM instance variable when the library is 49 first loaded */ 50 JavaVM *jvm; 51 52 JNIEXPORT jboolean JNICALL AWTIsHeadless() { 53 static JNIEnv *env = NULL; 54 static jboolean isHeadless; 55 jmethodID headlessFn; 56 jclass graphicsEnvClass; 57 58 if (env == NULL) { 59 env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); 60 graphicsEnvClass = (*env)->FindClass(env, 61 "java/awt/GraphicsEnvironment"); 62 if (graphicsEnvClass == NULL) { 63 return JNI_TRUE; 64 } 65 headlessFn = (*env)->GetStaticMethodID(env, 66 graphicsEnvClass, "isHeadless", "()Z"); 67 if (headlessFn == NULL) { 68 return JNI_TRUE; 69 } 70 isHeadless = (*env)->CallStaticBooleanMethod(env, graphicsEnvClass, 71 headlessFn); 72 } 73 return isHeadless; 74 } 75 76 jint 77 AWT_OnLoad(JavaVM *vm, void *reserved) 78 { 79 Dl_info dlinfo; 80 char buf[MAXPATHLEN]; 81 int32_t len; 82 char *p; 83 JNI_OnLoad_type *JNI_OnLoad_ptr; 84 struct utsname name; 85 JNIEnv *env = (JNIEnv *)JNU_GetEnv(vm, JNI_VERSION_1_2); 86 void *v; 87 char *envvar; 88 int xt_before_xm = 0; 89 int XAWT = 0; 90 jstring toolkit = NULL; 91 jstring propname = NULL; 92 93 if (awtHandle != NULL) { 94 /* Avoid several loading attempts */ 95 return JNI_VERSION_1_2; 96 } 97 98 jvm = vm; 99 100 /* Get address of this library and the directory containing it. */ 101 dladdr((void *)JNI_OnLoad, &dlinfo); 102 realpath((char *)dlinfo.dli_fname, buf); 103 len = strlen(buf); 104 p = strrchr(buf, '/'); 105 106 /* 107 * The code below is responsible for: 108 * 1. Loading appropriate awt library, i.e. libawt_xawt or libawt_headless 109 * 2. Setting "awt.toolkit" system property to use the appropriate Java toolkit class, 110 * (if user has specified the toolkit in env varialble) 111 */ 112 113 propname = (*env)->NewStringUTF(env, "awt.toolkit"); 114 /* Check if toolkit is specified in env variable */ 115 envvar = getenv("AWT_TOOLKIT"); 116 if (envvar) { 117 if (strstr(envvar, "XToolkit")) { 118 toolkit = (*env)->NewStringUTF(env, "sun.awt.X11.XToolkit"); 119 } 120 /* If user specified toolkit then set java system property */ 121 if (toolkit && propname) { 122 JNU_CallStaticMethodByName (env, 123 NULL, 124 "java/lang/System", 125 "setProperty", 126 "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;", 127 propname,toolkit); 128 } 129 } 130 131 /* Calculate library name to load */ 132 if (AWTIsHeadless()) { 133 strncpy(p, "/libawt_headless.so", MAXPATHLEN-len-1); 134 } else { 135 /* Default AWT Toolkit on Linux and Solaris is XAWT. */ 136 strncpy(p, "/libawt_xawt.so", MAXPATHLEN-len-1); 137 } 138 139 if (toolkit) { 140 (*env)->DeleteLocalRef(env, toolkit); 141 } 142 if (propname) { 143 (*env)->DeleteLocalRef(env, propname); 144 } 145 146 JNU_CallStaticMethodByName(env, NULL, "java/lang/System", "load", 147 "(Ljava/lang/String;)V", 148 JNU_NewStringPlatform(env, buf)); 149 150 awtHandle = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL); 151 152 return JNI_VERSION_1_2; 153 } 154 155 JNIEXPORT jint JNICALL 156 JNI_OnLoad(JavaVM *vm, void *reserved) 157 { 158 return AWT_OnLoad(vm, reserved); 159 } 160 161 /* 162 * This entry point must remain in libawt.so as part of a contract 163 * with the CDE variant of Java Media Framework. (sdtjmplay) 164 * Reflect this call over to the correct libmawt.so. 165 */ 166 JNIEXPORT void JNICALL 167 Java_sun_awt_motif_XsessionWMcommand(JNIEnv *env, jobject this, 168 jobject frame, jstring jcommand) 169 { 170 /* type of the old backdoor function */ 171 typedef JNIEXPORT void JNICALL 172 XsessionWMcommand_type(JNIEnv *env, jobject this, 173 jobject frame, jstring jcommand); 174 175 static XsessionWMcommand_type *XsessionWMcommand = NULL; 176 177 if (XsessionWMcommand == NULL && awtHandle == NULL) { 178 return; 179 } 180 181 XsessionWMcommand = (XsessionWMcommand_type *) 182 dlsym(awtHandle, "Java_sun_awt_motif_XsessionWMcommand"); 183 184 if (XsessionWMcommand == NULL) 185 return; 186 187 (*XsessionWMcommand)(env, this, frame, jcommand); 188 } 189 190 191 /* 192 * This entry point must remain in libawt.so as part of a contract 193 * with the CDE variant of Java Media Framework. (sdtjmplay) 194 * Reflect this call over to the correct libmawt.so. 195 */ 196 JNIEXPORT void JNICALL 197 Java_sun_awt_motif_XsessionWMcommand_New(JNIEnv *env, jobjectArray jargv) 198 { 199 typedef JNIEXPORT void JNICALL 200 XsessionWMcommand_New_type(JNIEnv *env, jobjectArray jargv); 201 202 static XsessionWMcommand_New_type *XsessionWMcommand = NULL; 203 204 if (XsessionWMcommand == NULL && awtHandle == NULL) { 205 return; 206 } 207 208 XsessionWMcommand = (XsessionWMcommand_New_type *) 209 dlsym(awtHandle, "Java_sun_awt_motif_XsessionWMcommand_New"); 210 211 if (XsessionWMcommand == NULL) 212 return; 213 214 (*XsessionWMcommand)(env, jargv); 215 } 216 217 218 #define REFLECT_VOID_FUNCTION(name, arglist, paramlist) \ 219 typedef name##_type arglist; \ 220 void name arglist \ 221 { \ 222 static name##_type *name##_ptr = NULL; \ 223 if (name##_ptr == NULL && awtHandle == NULL) { \ 224 return; \ 225 } \ 226 name##_ptr = (name##_type *) \ 227 dlsym(awtHandle, #name); \ 228 if (name##_ptr == NULL) { \ 229 return; \ 230 } \ 231 (*name##_ptr)paramlist; \ 232 } 233 234 #define REFLECT_FUNCTION(return_type, name, arglist, paramlist) \ 235 typedef return_type name##_type arglist; \ 236 return_type name arglist \ 237 { \ 238 static name##_type *name##_ptr = NULL; \ 239 if (name##_ptr == NULL && awtHandle == NULL) { \ 240 return NULL; \ 241 } \ 242 name##_ptr = (name##_type *) \ 243 dlsym(awtHandle, #name); \ 244 if (name##_ptr == NULL) { \ 245 return NULL; \ 246 } \ 247 return (*name##_ptr)paramlist; \ 248 } 249 250 251 /* 252 * These entry point must remain in libawt.so ***for Java Plugin ONLY*** 253 * Reflect this call over to the correct libmawt.so. 254 */ 255 256 REFLECT_VOID_FUNCTION(getAwtLockFunctions, 257 (void (**AwtLock)(JNIEnv *), void (**AwtUnlock)(JNIEnv *), 258 void (**AwtNoFlushUnlock)(JNIEnv *), void *reserved), 259 (AwtLock, AwtUnlock, AwtNoFlushUnlock, reserved)) 260 261 REFLECT_VOID_FUNCTION(getAwtData, 262 (int32_t *awt_depth, Colormap *awt_cmap, Visual **awt_visual, 263 int32_t *awt_num_colors, void *pReserved), 264 (awt_depth, awt_cmap, awt_visual, 265 awt_num_colors, pReserved)) 266 267 REFLECT_FUNCTION(Display *, getAwtDisplay, (void), ())