-
-
Notifications
You must be signed in to change notification settings - Fork 44
/
LaunchClassLoader.java
557 lines (484 loc) · 18.6 KB
/
LaunchClassLoader.java
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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
package net.minecraft.launchwrapper;
import cpw.mods.fml.relauncher.FMLRelaunchLog;
import nallar.tickthreading.patcher.PatchHook;
import java.io.*;
import java.lang.reflect.*;
import java.net.*;
import java.security.*;
import java.util.*;
import java.util.jar.*;
import java.util.jar.Attributes.*;
import java.util.logging.*;
public class LaunchClassLoader extends URLClassLoader {
private IClassTransformer deobfuscationTransformer;
private final List<URL> sources;
private final ClassLoader parent = getClass().getClassLoader();
private final List<IClassTransformer> transformers = new ArrayList<IClassTransformer>(2);
private final Map<String, Class<?>> cachedClasses = new HashMap<String, Class<?>>(1000);
private final Set<String> invalidClasses = new HashSet<String>(1000);
private final Set<String> classLoaderExceptions = new HashSet<String>();
private final Set<String> transformerExceptions = new HashSet<String>();
private final Map<String, byte[]> resourceCache = new HashMap<String, byte[]>(1000);
private IClassNameTransformer renameTransformer;
private static final String[] RESERVED_NAMES = {"CON", "PRN", "AUX", "NUL", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"};
private static final boolean DEBUG = Boolean.parseBoolean(System.getProperty("legacy.debugClassLoading", "false"));
private static final boolean DEBUG_FINER = DEBUG && Boolean.parseBoolean(System.getProperty("legacy.debugClassLoadingFiner", "false"));
private static final boolean DEBUG_SAVE = DEBUG && Boolean.parseBoolean(System.getProperty("legacy.debugClassLoadingSave", "false"));
private static File tempFolder = null;
public static LaunchClassLoader instance;
public LaunchClassLoader(URL[] sources) {
super(sources, null);
if (instance == null) {
instance = this;
} else {
LogWrapper.log(Level.SEVERE, new Throwable(), "Initing extra LaunchClassLoader - why?!");
}
this.sources = new ArrayList<URL>(Arrays.asList(sources));
Thread.currentThread().setContextClassLoader(this);
// classloader exclusions
addClassLoaderExclusion("java.");
addClassLoaderExclusion("javassist.");
addClassLoaderExclusion("sun.");
addClassLoaderExclusion("org.lwjgl.");
addClassLoaderExclusion("org.apache.logging.");
addClassLoaderExclusion("net.minecraft.launchwrapper.");
// transformer exclusions
addTransformerExclusion("argo.");
addTransformerExclusion("javax.");
addTransformerExclusion("org.objectweb.asm.");
addTransformerExclusion("com.google.common.");
addTransformerExclusion("org.bouncycastle.");
addTransformerExclusion("net.minecraft.launchwrapper.injector.");
if (DEBUG_SAVE) {
int x = 1;
tempFolder = new File(Launch.minecraftHome, "CLASSLOADER_TEMP");
while (tempFolder.exists() && x <= 10) {
tempFolder = new File(Launch.minecraftHome, "CLASSLOADER_TEMP" + x++);
}
if (tempFolder.exists()) {
LogWrapper.info("DEBUG_SAVE enabled, but 10 temp directories already exist, clean them and try again.");
tempFolder = null;
} else {
LogWrapper.info("DEBUG_SAVE Enabled, saving all classes to \"%s\"", tempFolder.getAbsolutePath().replace('\\', '/'));
if (!tempFolder.mkdirs()) {
LogWrapper.info("Failed to make tempFolder: " + tempFolder);
}
}
}
}
private boolean initedTTPatcher = false;
public static final long launchTime = System.currentTimeMillis();
private void ttPatchInit() {
if (!initedTTPatcher) {
initedTTPatcher = true;
try {
FMLRelaunchLog.finest("Dummy log message to make sure that FMLRelaunchLog has been set up.");
} catch (Throwable t) {
System.err.println("Failure in FMLRelaunchLog");
t.printStackTrace(System.err);
}
try {
Class.forName("nallar.tickthreading.patcher.PatchHook");
} catch (ClassNotFoundException e) {
FMLRelaunchLog.log(Level.SEVERE, e, "Failed to init TT PatchHook");
System.exit(1);
}
}
}
public void registerTransformer(String transformerClassName) {
try {
IClassTransformer transformer = (IClassTransformer) loadClass(transformerClassName).getConstructor().newInstance();
if (transformer instanceof IClassNameTransformer && renameTransformer == null) {
renameTransformer = (IClassNameTransformer) transformer;
}
if (transformerClassName.equals("cpw.mods.fml.common.asm.transformers.DeobfuscationTransformer")) {
deobfuscationTransformer = transformer;
ArrayList<IClassTransformer> oldTransformersList = new ArrayList<IClassTransformer>(transformers);
transformers.clear();
IClassTransformer eventTransformer = null;
for (IClassTransformer transformer_ : oldTransformersList) {
if (transformer_.getClass().getName().equals("net.minecraftforge.transformers.EventTransformer")) {
eventTransformer = transformer_;
} else {
transformers.add(transformer_);
}
}
transformers.add(transformer);
if (eventTransformer == null) {
FMLRelaunchLog.severe("Failed to find event transformer.");
} else {
transformers.add(eventTransformer);
}
} else {
transformers.add(transformer);
}
} catch (Exception e) {
LogWrapper.log(Level.SEVERE, "Critical problem occurred registering the ASM transformer class %s", transformerClassName);
}
}
public boolean excluded(String name) {
for (final String exception : classLoaderExceptions) {
if (name.startsWith(exception)) {
return true;
}
}
return false;
}
private static final Method findLoaded = getFindLoaded();
private static Method getFindLoaded() {
try {
Method m = ClassLoader.class.getDeclaredMethod("findLoadedClass", new Class[] { String.class });
m.setAccessible(true);
return m;
} catch (NoSuchMethodException e) {
LogWrapper.log(Level.SEVERE, e, "");
return null;
}
}
@Override
public Class<?> findClass(final String name) throws ClassNotFoundException {
if (invalidClasses.contains(name)) {
throw new ClassNotFoundException(name);
}
if (excluded(name)) {
return parent.loadClass(name);
}
Class alreadyLoaded = null;
try {
alreadyLoaded = (Class) findLoaded.invoke(parent, name);
} catch (Throwable t) {
LogWrapper.log(Level.SEVERE, t, "");
}
if (alreadyLoaded != null) {
if (name.startsWith("nallar.") && !name.startsWith("nallar.tickthreading.util")) {
if (!name.startsWith("nallar.log.")) {
LogWrapper.log(Level.SEVERE, new Error(), "Already classloaded earlier: " + name);
LogWrapper.log(Level.SEVERE, new Error(), "THIS WILL CAUSE SEVERE ISSUES");
try {
Thread.sleep(2000);
} catch (InterruptedException ignored) {
}
throw new InternalError("Classloading failure");
}
return alreadyLoaded;
}
}
Class<?> cached = cachedClasses.get(name);
if (cached != null) {
return cached;
}
for (final String exception : transformerExceptions) {
if (name.startsWith(exception)) {
try {
final Class<?> clazz = super.findClass(name);
if (clazz == null) {
throw new ClassNotFoundException("null from super.findClass");
}
cachedClasses.put(name, clazz);
return clazz;
} catch (ClassNotFoundException e) {
invalidClasses.add(name);
throw e;
}
}
}
try {
final String transformedName = transformName(name);
if (!transformedName.equals(name)) {
FMLRelaunchLog.severe("Asked for " + name + ", giving " + transformedName);
cached = cachedClasses.get(transformedName);
if (cached != null) {
return cached;
}
}
final String untransformedName = untransformName(name);
final int lastDot = untransformedName.lastIndexOf('.');
final String packageName = lastDot == -1 ? "" : untransformedName.substring(0, lastDot);
final String fileName = untransformedName.replace('.', '/') + ".class";
URLConnection urlConnection = findCodeSourceConnectionFor(fileName);
CodeSigner[] signers = null;
byte[] classBytes = null;
if (lastDot > -1 && !untransformedName.startsWith("net.minecraft.")) {
if (urlConnection instanceof JarURLConnection) {
final JarURLConnection jarURLConnection = (JarURLConnection) urlConnection;
final JarFile jarFile = jarURLConnection.getJarFile();
if (jarFile != null && jarFile.getManifest() != null) {
final Manifest manifest = jarFile.getManifest();
final JarEntry entry = jarFile.getJarEntry(fileName);
Package pkg = getPackage(packageName);
classBytes = getClassBytes(untransformedName);
signers = entry.getCodeSigners();
if (pkg == null) {
definePackage(packageName, manifest, jarURLConnection.getJarFileURL());
} else {
if (pkg.isSealed() && !pkg.isSealed(jarURLConnection.getJarFileURL())) {
LogWrapper.severe("The jar file %s is trying to seal already secured path %s", jarFile.getName(), packageName);
} else if (isSealed(packageName, manifest)) {
LogWrapper.severe("The jar file %s has a security seal for path %s, but that path is defined and not secure", jarFile.getName(), packageName);
}
}
}
} else {
Package pkg = getPackage(packageName);
if (pkg == null) {
definePackage(packageName, null, null, null, null, null, null, null);
} else if (pkg.isSealed()) {
LogWrapper.severe("The URL %s is defining elements for sealed path %s", urlConnection.getURL(), packageName);
}
}
}
if (classBytes == null) {
classBytes = getClassBytes(untransformedName);
}
final byte[] transformedClass = runTransformers(untransformedName, transformedName, classBytes);
if (DEBUG_SAVE) {
saveTransformedClass(transformedClass, transformedName);
}
final CodeSource codeSource = urlConnection == null ? null : new CodeSource(urlConnection.getURL(), signers);
final Class<?> clazz = defineClass(transformedName, transformedClass, 0, transformedClass.length, codeSource);
cachedClasses.put(transformedName, clazz);
return clazz;
} catch (Throwable e) {
invalidClasses.add(name);
if (DEBUG) {
LogWrapper.log(Level.FINE, e, "Exception encountered attempting classloading of %s", name);
}
throw new ClassNotFoundException(name, e);
}
}
private static void saveTransformedClass(final byte[] data, final String transformedName) {
if (tempFolder == null) {
return;
}
final File outFile = new File(tempFolder, transformedName.replace('.', File.separatorChar) + ".class");
final File outDir = outFile.getParentFile();
if (!outDir.exists() && !outDir.mkdirs()) {
LogWrapper.warning("Failed to make outDir: " + outDir);
}
if (outFile.exists() && !outFile.delete()) {
LogWrapper.warning("Failed to delete outFile: " + outFile);
}
try {
LogWrapper.fine("Saving transformed class \"%s\" to \"%s\"", transformedName, outFile.getAbsolutePath().replace('\\', '/'));
final OutputStream output = new FileOutputStream(outFile);
output.write(data);
output.close();
} catch (IOException ex) {
LogWrapper.log(Level.WARNING, ex, "Could not save transformed class \"%s\"", transformedName);
}
}
private String untransformName(final String name) {
if (renameTransformer != null) {
return renameTransformer.unmapClassName(name);
}
return name;
}
private String transformName(final String name) {
if (renameTransformer != null) {
return renameTransformer.remapClassName(name);
}
return name;
}
private static boolean isSealed(final String path, final Manifest manifest) {
Attributes attributes = manifest.getAttributes(path);
if (attributes == null) {
attributes = manifest.getMainAttributes();
}
return attributes != null && "true".equalsIgnoreCase(attributes.getValue(Name.SEALED));
}
private URLConnection findCodeSourceConnectionFor(final String name) {
final URL resource = findResource(name);
if (resource != null) {
try {
return resource.openConnection();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
return null;
}
@SuppressWarnings("ConstantConditions")
private static byte[] runTransformer(final String name, final String transformedName, byte[] basicClass, final IClassTransformer transformer) {
try {
return transformer.transform(name, transformedName, basicClass);
} catch (Throwable t) {
String message = t.getMessage();
if (message != null && message.contains("for invalid side")) {
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
} else if (t instanceof Error) {
throw (Error) t;
} else {
throw new RuntimeException(t);
}
} else if (basicClass != null || DEBUG_FINER) {
FMLRelaunchLog.log((DEBUG_FINER && basicClass != null) ? Level.WARNING : Level.FINE, t, "Failed to transform " + name);
}
return basicClass;
}
}
private byte[] runTransformers(final String name, final String transformedName, byte[] basicClass) {
ttPatchInit();
basicClass = PatchHook.preSrgTransformationHook(name, transformedName, basicClass);
if (deobfuscationTransformer == null) {
if (transformedName.startsWith("net.minecraft.") && !transformedName.contains("ClientBrandRetriever")) {
FMLRelaunchLog.log(Level.WARNING, new Throwable(), "Transforming " + name + " before SRG transformer has been added.");
}
for (final IClassTransformer transformer : transformers) {
basicClass = runTransformer(name, transformedName, basicClass, transformer);
}
return basicClass;
}
basicClass = transformUpToSrg(name, transformedName, basicClass);
basicClass = PatchHook.postSrgTransformationHook(name, transformedName, basicClass);
basicClass = transformAfterSrg(name, transformedName, basicClass);
return basicClass;
}
private final HashMap<String, byte[]> cachedSrgClasses = new HashMap<String, byte[]>();
private byte[] transformUpToSrg(final String name, final String transformedName, byte[] basicClass) {
byte[] cached = cachedSrgClasses.get(transformedName);
if (cached != null) {
return cached;
}
for (final IClassTransformer transformer : transformers) {
basicClass = runTransformer(name, transformedName, basicClass, transformer);
if (transformer == deobfuscationTransformer) {
cachedSrgClasses.put(transformedName, basicClass);
return basicClass;
}
}
throw new RuntimeException("No SRG transformer!" + transformers.toString() + " -> " + deobfuscationTransformer);
}
private byte[] transformAfterSrg(final String name, final String transformedName, byte[] basicClass) {
boolean pastSrg = false;
for (final IClassTransformer transformer : transformers) {
if (pastSrg) {
basicClass = runTransformer(name, transformedName, basicClass, transformer);
} else if (transformer == deobfuscationTransformer) {
pastSrg = true;
}
}
if (!pastSrg) {
throw new RuntimeException("No SRG transformer!");
}
return basicClass;
}
public byte[] getPreSrgBytes(String name) {
name = untransformName(name);
try {
return getClassBytes(name);
} catch (Throwable t) {
throw new RuntimeException(t);
}
}
public byte[] getSrgBytes(String name) {
final String transformedName = transformName(name);
name = untransformName(name);
byte[] cached = cachedSrgClasses.get(transformedName);
if (cached != null) {
return cached;
}
try {
byte[] bytes = getClassBytes(name);
return transformUpToSrg(name, transformedName, bytes);
} catch (Throwable t) {
throw new RuntimeException(t);
}
}
@Override
public void addURL(final URL url) {
super.addURL(url);
sources.add(url);
}
public List<URL> getSources() {
return sources;
}
private static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
private static final ThreadLocal<byte[]> loadBuffer = new ThreadLocal<byte[]>() {
@Override
public byte[] initialValue() {
return new byte[1048756];
}
};
protected static byte[] readFully(InputStream stream) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream(stream.available());
int readBytes;
byte[] buffer = loadBuffer.get();
while ((readBytes = stream.read(buffer, 0, buffer.length)) != -1) {
bos.write(buffer, 0, readBytes);
}
return bos.toByteArray();
} catch (Throwable t) {
FMLRelaunchLog.log(Level.SEVERE, t, "Problem loading class");
return EMPTY_BYTE_ARRAY;
}
}
public List<IClassTransformer> getTransformers() {
return Collections.unmodifiableList(transformers);
}
public void addClassLoaderExclusion(String toExclude) {
classLoaderExceptions.add(toExclude);
}
public void addTransformerExclusion(String toExclude) {
transformerExceptions.add(toExclude);
}
@SuppressWarnings("MismatchedReadAndWriteOfArray")
private static final byte[] CACHE_MISS = new byte[0];
public byte[] getClassBytes(String name) throws IOException {
if (name.startsWith("java/")) {
return null;
}
byte[] cached = resourceCache.get(name);
if (cached != null) {
return cached == CACHE_MISS ? null : cached;
}
if (name.indexOf('.') == -1) {
String upperCaseName = name.toUpperCase(Locale.ENGLISH);
for (final String reservedName : RESERVED_NAMES) {
if (upperCaseName.startsWith(reservedName)) {
final byte[] data = getClassBytes('_' + name);
if (data != null) {
resourceCache.put(name, data);
return data;
}
}
}
}
InputStream classStream = null;
try {
final String resourcePath = name.replace('.', '/') + ".class";
final URL classResource = findResource(resourcePath);
if (classResource == null) {
if (DEBUG) LogWrapper.finest("Failed to find class resource %s", resourcePath);
resourceCache.put(name, CACHE_MISS);
return null;
}
classStream = classResource.openStream();
if (DEBUG) LogWrapper.finest("Loading class %s from resource %s", name, classResource.toString());
final byte[] data = readFully(classStream);
resourceCache.put(name, data);
return data;
} finally {
closeSilently(classStream);
}
}
private static void closeSilently(Closeable closeable) {
if (closeable != null) {
try {
closeable.close();
} catch (IOException ignored) {
}
}
}
public void clearNegativeEntries(Set<String> entriesToClear) {
for (String entry : entriesToClear) {
if (resourceCache.get(entry) == CACHE_MISS) {
resourceCache.remove(entry);
}
}
}
public static void testForTTChanges() {
// Do nothing, just make this method exist.
}
}