-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathfunctions.cpp
More file actions
238 lines (175 loc) · 6.72 KB
/
Copy pathfunctions.cpp
File metadata and controls
238 lines (175 loc) · 6.72 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
#include <Windows.h>
#include <iostream>
#include <jvmti.h>
#include <jni.h>
#include <string>
#include <winuser.h>
#include "functions.h"
#include "dllmain.h"
using namespace std;
static string PREFIX = "§8[§aEssentialPatcher§8] §7";
jmethodID findclass_md;
jobject classloader_obj;
jint JNICALL heapCallback(
jlong class_tag,
jlong size,
jlong *tag_ptr,
jint length,
void *user_data)
{
*tag_ptr = 1;
return JVMTI_VISIT_OBJECTS;
}
jobject get_essential_classloader()
{
jclass relaunchLoader = get_env()->FindClass("gg/essential/loader/stage2/relaunch/RelaunchClassLoader");
if (relaunchLoader == NULL)
{
printf("Couldn't find RelaunchClassLoader.\n");
return NULL;
}
jvmtiHeapCallbacks callbacks = {};
callbacks.heap_iteration_callback = heapCallback;
get_jvmti()->IterateThroughHeap(
0,
relaunchLoader,
&callbacks,
NULL);
jlong tags = 1;
jint count;
jobject *instances;
get_jvmti()->GetObjectsWithTags(
1,
&tags,
&count,
&instances,
NULL);
jobject target = instances[0];
get_jvmti()->Deallocate((unsigned char *)instances);
jmethodID rl_findclass_md = get_env()->GetMethodID(relaunchLoader, "findClass", "(Ljava/lang/String;)Ljava/lang/Class;");
jstring launchwrapper = get_env()->NewStringUTF("net.minecraft.launchwrapper.LaunchClassLoader");
jclass launchwrapper_cls = reinterpret_cast<jclass>(get_env()->CallObjectMethod(target, rl_findclass_md, launchwrapper));
jstring launch = get_env()->NewStringUTF("net.minecraft.launchwrapper.Launch");
jclass launch_cls = reinterpret_cast<jclass>(get_env()->CallObjectMethod(target, rl_findclass_md, launch));
jfieldID classloader_fid = get_env()->GetStaticFieldID(launch_cls, "classLoader", "Lnet/minecraft/launchwrapper/LaunchClassLoader;");
jobject classloader_obj = get_env()->NewGlobalRef(get_env()->GetStaticObjectField(launch_cls, classloader_fid));
get_env()->DeleteLocalRef(launchwrapper_cls);
get_env()->DeleteLocalRef(launch_cls);
get_env()->DeleteLocalRef(launchwrapper);
get_env()->DeleteLocalRef(launch);
return classloader_obj;
}
void override_normal_with_essential()
{
jobject essentialClassloader = get_essential_classloader();
if (essentialClassloader == NULL)
{
printf("Couldn't find Essential classloader.\n");
return;
}
jclass launch_cls = get_env()->FindClass("net/minecraft/launchwrapper/Launch");
jfieldID classloader_fid = get_env()->GetStaticFieldID(launch_cls, "classLoader", "Lnet/minecraft/launchwrapper/LaunchClassLoader;");
get_env()->SetStaticObjectField(launch_cls, classloader_fid, essentialClassloader);
get_env()->DeleteLocalRef(launch_cls);
}
bool using_essential()
{
return get_env()->FindClass("gg/essential/loader/stage2/relaunch/RelaunchClassLoader") != NULL;
}
/* Minecraft Functions */
inline jclass find_class(const char *name)
{
jstring jname = get_env()->NewStringUTF(name);
jclass cls = reinterpret_cast<jclass>(get_env()->CallObjectMethod(classloader_obj, findclass_md, jname));
get_env()->DeleteLocalRef(jname);
return cls;
}
void set_launchwrapper_essential()
{
jclass relaunchLoader = get_env()->FindClass("gg/essential/loader/stage2/relaunch/RelaunchClassLoader");
if (relaunchLoader == NULL)
{
printf("Couldn't find loader\n");
return;
}
jvmtiHeapCallbacks callbacks = {};
callbacks.heap_iteration_callback = heapCallback;
get_jvmti()->IterateThroughHeap(
0,
relaunchLoader,
&callbacks,
NULL);
jlong tags = 1;
jint count;
jobject *instances;
get_jvmti()->GetObjectsWithTags(
1,
&tags,
&count,
&instances,
NULL);
jobject target = instances[0];
get_jvmti()->Deallocate((unsigned char *)instances);
jmethodID rl_findclass_md = get_env()->GetMethodID(relaunchLoader, "findClass", "(Ljava/lang/String;)Ljava/lang/Class;");
jstring launchwrapper = get_env()->NewStringUTF("net.minecraft.launchwrapper.LaunchClassLoader");
jclass launchwrapper_cls = reinterpret_cast<jclass>(get_env()->CallObjectMethod(target, rl_findclass_md, launchwrapper));
jstring launch = get_env()->NewStringUTF("net.minecraft.launchwrapper.Launch");
jclass launch_cls = reinterpret_cast<jclass>(get_env()->CallObjectMethod(target, rl_findclass_md, launch));
auto classloader_fid = get_env()->GetStaticFieldID(launch_cls, "classLoader", "Lnet/minecraft/launchwrapper/LaunchClassLoader;");
findclass_md = get_env()->GetMethodID(launchwrapper_cls, "findClass", "(Ljava/lang/String;)Ljava/lang/Class;");
classloader_obj = get_env()->NewGlobalRef(get_env()->GetStaticObjectField(launch_cls, classloader_fid));
get_env()->DeleteLocalRef(launchwrapper_cls);
get_env()->DeleteLocalRef(launch_cls);
get_env()->DeleteLocalRef(launchwrapper);
get_env()->DeleteLocalRef(launch);
}
void set_launchwrapper_normal()
{
jclass launchwrapper_cls = get_env()->FindClass("net/minecraft/launchwrapper/LaunchClassLoader");
jclass launch_cls = get_env()->FindClass("net/minecraft/launchwrapper/Launch");
auto classloader_fid = get_env()->GetStaticFieldID(launch_cls, "classLoader", "Lnet/minecraft/launchwrapper/LaunchClassLoader;");
findclass_md = get_env()->GetMethodID(launchwrapper_cls, "findClass", "(Ljava/lang/String;)Ljava/lang/Class;");
classloader_obj = get_env()->NewGlobalRef(get_env()->GetStaticObjectField(launch_cls, classloader_fid));
get_env()->DeleteLocalRef(launchwrapper_cls);
get_env()->DeleteLocalRef(launch_cls);
}
void get_launchwrapper()
{
if (using_essential())
set_launchwrapper_essential();
else
set_launchwrapper_normal();
}
jobject get_minecraft()
{
jobject res;
auto cls = find_class("net.minecraft.client.Minecraft");
auto mc_fid = get_env()->GetStaticMethodID(cls, "func_71410_x", "()Lnet/minecraft/client/Minecraft;");
res = get_env()->CallStaticObjectMethod(cls, mc_fid);
get_env()->DeleteLocalRef(cls);
return res;
}
jobject get_player(jobject mc)
{
jobject res;
auto cls = find_class("net.minecraft.client.Minecraft");
auto player_fid = get_env()->GetFieldID(cls, "field_71439_g", "Lnet/minecraft/client/entity/EntityPlayerSP;");
res = get_env()->GetObjectField(mc, player_fid);
get_env()->DeleteLocalRef(cls);
return res;
}
void send_chat(jobject player, const char *msg, bool prefix)
{
auto epsp_cls = find_class("net.minecraft.client.entity.EntityPlayerSP");
auto send_chat_fid = get_env()->GetMethodID(epsp_cls, "func_145747_a", "(Lnet/minecraft/util/IChatComponent;)V");
auto msg_cls = find_class("net.minecraft.util.ChatComponentText");
auto msg_fid = get_env()->GetMethodID(msg_cls, "<init>", "(Ljava/lang/String;)V");
jstring message = get_env()->NewStringUTF(msg);
if (prefix)
message = get_env()->NewStringUTF((PREFIX + msg).c_str());
auto msg_obj = get_env()->NewObject(msg_cls, msg_fid, message);
get_env()->CallVoidMethod(player, send_chat_fid, msg_obj);
get_env()->DeleteLocalRef(epsp_cls);
get_env()->DeleteLocalRef(msg_cls);
get_env()->DeleteLocalRef(msg_obj);
}