1 /*
2 * Copyright 2009, The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "MyJavaVM.h"
28
29 #include <JNIUtility.h>
30 #include <jni.h>
31
32 static JNIEnv* s_env;
33 static JavaVM* s_jvm;
34
35 // JavaVM functions
vm_attachCurrentThread(JavaVM *,JNIEnv ** env,void *)36 jint vm_attachCurrentThread(JavaVM*, JNIEnv** env, void*) {
37 *env = s_env;
38 return JNI_OK;
39 }
40
41 // JNIEnv functions
env_callObjectMethodV(JNIEnv *,jobject,jmethodID,va_list)42 jobject env_callObjectMethodV(JNIEnv*, jobject, jmethodID, va_list) {
43 return MY_JOBJECT;
44 }
env_callVoidMethodV(JNIEnv *,jobject,jmethodID,va_list)45 void env_callVoidMethodV(JNIEnv*, jobject, jmethodID, va_list) {}
env_deleteRef(JNIEnv *,jobject)46 void env_deleteRef(JNIEnv*, jobject) {}
env_exceptionCheck(JNIEnv *)47 jboolean env_exceptionCheck(JNIEnv*) {
48 return false;
49 }
env_findClass(JNIEnv *,const char *)50 jclass env_findClass(JNIEnv*, const char*) {
51 return (jclass) 1;
52 }
env_getByteArrayElements(JNIEnv *,jbyteArray,jboolean *)53 jbyte* env_getByteArrayElements(JNIEnv*, jbyteArray, jboolean*) {
54 return NULL;
55 }
env_getMethodID(JNIEnv *,jclass,const char *,const char *)56 jmethodID env_getMethodID(JNIEnv*, jclass, const char*, const char*) {
57 return (jmethodID) 1;
58 }
env_getObjectClass(JNIEnv *,jobject)59 jclass env_getObjectClass(JNIEnv*, jobject) {
60 return (jclass) 1;
61 }
62 static const char* s_fakeString = "Fake Java String";
env_getStringChars(JNIEnv *,jstring,jboolean * isCopy)63 const jchar* env_getStringChars(JNIEnv*, jstring, jboolean* isCopy) {
64 if (isCopy)
65 *isCopy = false;
66 return (const jchar*)s_fakeString;
67 }
env_getStringLength(JNIEnv *,jstring)68 jsize env_getStringLength(JNIEnv*, jstring) {
69 return sizeof(s_fakeString) - 1;
70 }
env_newByteArray(JNIEnv *,jsize)71 jbyteArray env_newByteArray(JNIEnv*, jsize) {
72 return (jbyteArray) 1;
73 }
env_newRef(JNIEnv *,jobject obj)74 jobject env_newRef(JNIEnv*, jobject obj) {
75 return obj;
76 }
env_newObjectV(JNIEnv *,jclass,jmethodID,va_list)77 jobject env_newObjectV(JNIEnv*, jclass, jmethodID, va_list) {
78 return MY_JOBJECT;
79 }
env_newString(JNIEnv *,const jchar *,jsize)80 jstring env_newString(JNIEnv*, const jchar*, jsize) {
81 return (jstring) 1;
82 }
env_releaseByteArrayElements(JNIEnv *,jbyteArray,jbyte *,jint)83 void env_releaseByteArrayElements(JNIEnv*, jbyteArray, jbyte*, jint) {}
env_releaseStringChars(JNIEnv *,jstring,const jchar *)84 void env_releaseStringChars(JNIEnv*, jstring, const jchar*) {}
env_setByteArrayRegion(JNIEnv *,jbyteArray,jsize,jsize,const jbyte *)85 void env_setByteArrayRegion(JNIEnv*, jbyteArray, jsize, jsize, const jbyte*) {}
env_setIntField(JNIEnv *,jobject,jfieldID,jint)86 void env_setIntField(JNIEnv*, jobject, jfieldID, jint) {}
87
InitializeJavaVM()88 void InitializeJavaVM() {
89 // First, create the fake vm
90 s_jvm = new JavaVM;
91 JNIInvokeInterface* i = new JNIInvokeInterface;
92 memset(i, 0, sizeof(JNIInvokeInterface));
93 s_jvm->functions = i;
94
95 // Now, assign the functions of the vm to our fake ones.
96 i->AttachCurrentThread = vm_attachCurrentThread;
97
98 // Create the fake env next
99 s_env = new JNIEnv;
100 JNINativeInterface* n = new JNINativeInterface;
101 memset(n, 0, sizeof(JNINativeInterface));
102 s_env->functions = n;
103
104 // Point the functions we care about to out fake ones.
105 n->CallObjectMethodV = env_callObjectMethodV;
106 n->CallVoidMethodV = env_callVoidMethodV;
107 n->DeleteLocalRef = env_deleteRef;
108 n->DeleteGlobalRef = env_deleteRef;
109 n->DeleteWeakGlobalRef = env_deleteRef;
110 n->ExceptionCheck = env_exceptionCheck;
111 n->FindClass = env_findClass;
112 n->GetByteArrayElements = env_getByteArrayElements;
113 n->GetMethodID = env_getMethodID;
114 n->GetObjectClass = env_getObjectClass;
115 n->GetStringChars = env_getStringChars;
116 n->GetStringLength = env_getStringLength;
117 n->NewByteArray = env_newByteArray;
118 n->NewLocalRef = env_newRef;
119 n->NewGlobalRef = env_newRef;
120 n->NewWeakGlobalRef = env_newRef;
121 n->NewObjectV = env_newObjectV;
122 n->NewString = env_newString;
123 n->ReleaseByteArrayElements = env_releaseByteArrayElements;
124 n->ReleaseStringChars = env_releaseStringChars;
125 n->SetByteArrayRegion = env_setByteArrayRegion;
126 n->SetIntField = env_setIntField;
127
128 // Tell WebCore about the vm
129 JSC::Bindings::setJavaVM(s_jvm);
130 }
131