1 /*
2 * Copyright (c) 2000, 2014, 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 #ifdef AIX
39 #include "porting_aix.h" /* For the 'dladdr' function. */
40 #endif
41
42 #ifdef DEBUG
43 #define VERBOSE_AWT_DEBUG
44 #endif
45
46 static void *awtHandle = NULL;
47
48 typedef jint JNICALL JNI_OnLoad_type(JavaVM *vm, void *reserved);
49
50 /* Initialize the Java VM instance variable when the library is
51 first loaded */
52 JavaVM *jvm;
53
54 JNIEXPORT jboolean JNICALL AWTIsHeadless() {
55 static JNIEnv *env = NULL;
56 static jboolean isHeadless;
57 jmethodID headlessFn;
58 jclass graphicsEnvClass;
59
60 if (env == NULL) {
61 env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
62 graphicsEnvClass = (*env)->FindClass(env,
63 "java/awt/GraphicsEnvironment");
64 if (graphicsEnvClass == NULL) {
65 return JNI_TRUE;
66 }
67 headlessFn = (*env)->GetStaticMethodID(env,
68 graphicsEnvClass, "isHeadless", "()Z");
69 if (headlessFn == NULL) {
70 return JNI_TRUE;
71 }
72 isHeadless = (*env)->CallStaticBooleanMethod(env, graphicsEnvClass,
73 headlessFn);
74 }
75 return isHeadless;
76 }
77
78 #define CHECK_EXCEPTION_FATAL(env, message) \
79 if ((*env)->ExceptionCheck(env)) { \
80 (*env)->ExceptionClear(env); \
81 (*env)->FatalError(env, message); \
82 }
83
84 /*
85 * Pathnames to the various awt toolkits
86 */
87
88 #ifdef MACOSX
89 #define LWAWT_PATH "/libawt_lwawt.dylib"
90 #define DEFAULT_PATH LWAWT_PATH
91 #else
92 #define XAWT_PATH "/libawt_xawt.so"
93 #define DEFAULT_PATH XAWT_PATH
94 #define HEADLESS_PATH "/libawt_headless.so"
95 #endif
96
97 jint
98 AWT_OnLoad(JavaVM *vm, void *reserved)
99 {
100 Dl_info dlinfo;
101 char buf[MAXPATHLEN];
102 int32_t len;
103 char *p, *tk;
104 JNI_OnLoad_type *JNI_OnLoad_ptr;
105 struct utsname name;
106 JNIEnv *env = (JNIEnv *)JNU_GetEnv(vm, JNI_VERSION_1_2);
107 void *v;
108 jstring fmanager = NULL;
109 jstring fmProp = NULL;
110
111 if (awtHandle != NULL) {
112 /* Avoid several loading attempts */
113 return JNI_VERSION_1_2;
114 }
115
116 jvm = vm;
117
118 /* Get address of this library and the directory containing it. */
119 dladdr((void *)AWT_OnLoad, &dlinfo);
120 realpath((char *)dlinfo.dli_fname, buf);
121 len = strlen(buf);
122 p = strrchr(buf, '/');
123
124 /*
125 * The code below is responsible for:
126 * 1. Loading appropriate awt library, i.e. libawt_xawt or libawt_headless
127 * 2. Set the "sun.font.fontmanager" system property.
128 */
129
130 fmProp = (*env)->NewStringUTF(env, "sun.font.fontmanager");
131 CHECK_EXCEPTION_FATAL(env, "Could not allocate font manager property");
132
133 #ifdef MACOSX
134 fmanager = (*env)->NewStringUTF(env, "sun.font.CFontManager");
135 tk = LWAWT_PATH;
136 #else
137 fmanager = (*env)->NewStringUTF(env, "sun.awt.X11FontManager");
138 tk = XAWT_PATH;
139 #endif
140 CHECK_EXCEPTION_FATAL(env, "Could not allocate font manager name");
141
142 if (fmanager && fmProp) {
143 JNU_CallStaticMethodByName(env, NULL, "java/lang/System", "setProperty",
144 "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;",
145 fmProp, fmanager);
146 CHECK_EXCEPTION_FATAL(env, "Could not allocate set properties");
147 }
148
149 #ifndef MACOSX
150 if (AWTIsHeadless()) {
151 tk = HEADLESS_PATH;
152 }
153 #endif
154
155 /* Calculate library name to load */
156 strncpy(p, tk, MAXPATHLEN-len-1);
157
158 if (fmProp) {
159 (*env)->DeleteLocalRef(env, fmProp);
160 }
161 if (fmanager) {
162 (*env)->DeleteLocalRef(env, fmanager);
163 }
164
165 jstring jbuf = JNU_NewStringPlatform(env, buf);
166 CHECK_EXCEPTION_FATAL(env, "Could not allocate library name");
167 JNU_CallStaticMethodByName(env, NULL, "java/lang/System", "load",
168 "(Ljava/lang/String;)V",
169 jbuf);
170
171 awtHandle = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL);
172
173 return JNI_VERSION_1_2;
174 }
175
176 JNIEXPORT jint JNICALL
177 JNI_OnLoad(JavaVM *vm, void *reserved)
178 {
179 return AWT_OnLoad(vm, reserved);
180 }
181
182 /*
183 * This entry point must remain in libawt.so as part of a contract
184 * with the CDE variant of Java Media Framework. (sdtjmplay)
185 * Reflect this call over to the correct libawt_<toolkit>.so.
186 */
187 JNIEXPORT void JNICALL
188 Java_sun_awt_motif_XsessionWMcommand(JNIEnv *env, jobject this,
189 jobject frame, jstring jcommand)
190 {
191 /* type of the old backdoor function */
192 typedef void JNICALL
193 XsessionWMcommand_type(JNIEnv *env, jobject this,
194 jobject frame, jstring jcommand);
195
196 static XsessionWMcommand_type *XsessionWMcommand = NULL;
197
198 if (XsessionWMcommand == NULL && awtHandle == NULL) {
199 return;
200 }
201
202 XsessionWMcommand = (XsessionWMcommand_type *)
203 dlsym(awtHandle, "Java_sun_awt_motif_XsessionWMcommand");
204
205 if (XsessionWMcommand == NULL)
206 return;
207
208 (*XsessionWMcommand)(env, this, frame, jcommand);
209 }
210
211
212 /*
213 * This entry point must remain in libawt.so as part of a contract
214 * with the CDE variant of Java Media Framework. (sdtjmplay)
215 * Reflect this call over to the correct libawt_<toolkit>.so.
216 */
217 JNIEXPORT void JNICALL
218 Java_sun_awt_motif_XsessionWMcommand_New(JNIEnv *env, jobjectArray jargv)
219 {
220 typedef void JNICALL
221 XsessionWMcommand_New_type(JNIEnv *env, jobjectArray jargv);
222
223 static XsessionWMcommand_New_type *XsessionWMcommand = NULL;
224
225 if (XsessionWMcommand == NULL && awtHandle == NULL) {
226 return;
227 }
228
229 XsessionWMcommand = (XsessionWMcommand_New_type *)
230 dlsym(awtHandle, "Java_sun_awt_motif_XsessionWMcommand_New");
231
232 if (XsessionWMcommand == NULL)
233 return;
234
235 (*XsessionWMcommand)(env, jargv);
236 }