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Added the ability to save transformed classes to disc for debugging.

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This commit is contained in:
LexManos 2013-04-04 10:32:48 -07:00
parent cc2bf9d8ac
commit 2c0133af1d
1 changed files with 60 additions and 0 deletions
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60
fml/common/cpw/mods/fml/relauncher/RelaunchClassLoader.java
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@ -13,8 +13,11 @@
package cpw.mods.fml.relauncher; package cpw.mods.fml.relauncher;
import java.io.ByteArrayOutputStream; import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException; import java.io.IOException;
import java.io.InputStream; import java.io.InputStream;
import java.io.OutputStream;
import java.net.JarURLConnection; import java.net.JarURLConnection;
import java.net.URL; import java.net.URL;
import java.net.URLClassLoader; import java.net.URLClassLoader;
@ -61,6 +64,8 @@ public class RelaunchClassLoader extends URLClassLoader
private static final boolean DEBUG_CLASSLOADING = Boolean.parseBoolean(System.getProperty("fml.debugClassLoading", "false")); private static final boolean DEBUG_CLASSLOADING = Boolean.parseBoolean(System.getProperty("fml.debugClassLoading", "false"));
private static final boolean DEBUG_CLASSLOADING_FINER = DEBUG_CLASSLOADING && Boolean.parseBoolean(System.getProperty("fml.debugClassLoadingFiner", "false")); private static final boolean DEBUG_CLASSLOADING_FINER = DEBUG_CLASSLOADING && Boolean.parseBoolean(System.getProperty("fml.debugClassLoadingFiner", "false"));
private static final boolean DEBUG_CLASSLOADING_SAVE = DEBUG_CLASSLOADING && Boolean.parseBoolean(System.getProperty("fml.debugClassLoadingSave", "false"));
private static File temp_folder = null;
public RelaunchClassLoader(URL[] sources) public RelaunchClassLoader(URL[] sources)
{ {
@ -87,6 +92,27 @@ public class RelaunchClassLoader extends URLClassLoader
addTransformerExclusion("com.google.common."); addTransformerExclusion("com.google.common.");
addTransformerExclusion("org.bouncycastle."); addTransformerExclusion("org.bouncycastle.");
addTransformerExclusion("cpw.mods.fml.common.asm.transformers.deobf."); addTransformerExclusion("cpw.mods.fml.common.asm.transformers.deobf.");
if (DEBUG_CLASSLOADING_SAVE)
{
int x = 1;
temp_folder = new File(FMLRelaunchLog.minecraftHome, "CLASSLOADER_TEMP");
while(temp_folder.exists() && x <= 10)
{
temp_folder = new File(FMLRelaunchLog.minecraftHome, "CLASSLOADER_TEMP" + x++);
}
if (temp_folder.exists())
{
FMLRelaunchLog.info("DEBUG_CLASSLOADING_SAVE enabled, but 10 temp directories already exist, clean them and try again.");
temp_folder = null;
}
else
{
FMLRelaunchLog.info("DEBUG_CLASSLOADING_SAVE Enabled, saving all classes to \"%s\"", temp_folder.getAbsolutePath().replace('\\', '/'));
temp_folder.mkdirs();
}
}
} }
public void registerTransformer(String transformerClassName) public void registerTransformer(String transformerClassName)
@ -197,6 +223,7 @@ public class RelaunchClassLoader extends URLClassLoader
} }
byte[] basicClass = getClassBytes(untransformedName); byte[] basicClass = getClassBytes(untransformedName);
byte[] transformedClass = runTransformers(untransformedName, transformedName, basicClass); byte[] transformedClass = runTransformers(untransformedName, transformedName, basicClass);
saveTransformedClass(transformedClass, transformedName);
Class<?> cl = defineClass(transformedName, transformedClass, 0, transformedClass.length, (urlConnection == null ? null : new CodeSource(urlConnection.getURL(), signers))); Class<?> cl = defineClass(transformedName, transformedClass, 0, transformedClass.length, (urlConnection == null ? null : new CodeSource(urlConnection.getURL(), signers)));
cachedClasses.put(transformedName, cl); cachedClasses.put(transformedName, cl);
return cl; return cl;
@ -212,6 +239,39 @@ public class RelaunchClassLoader extends URLClassLoader
} }
} }
private void saveTransformedClass(byte[] data, String transformedName)
{
if (!DEBUG_CLASSLOADING_SAVE || temp_folder == null)
{
return;
}
File outFile = new File(temp_folder, transformedName.replace('.', File.separatorChar) + ".class");
File outDir = outFile.getParentFile();
if (!outDir.exists())
{
outDir.mkdirs();
}
if (outFile.exists())
{
outFile.delete();
}
try
{
FMLRelaunchLog.fine("Saving transformed class \"%s\" to \"%s\"", transformedName, outFile.getAbsolutePath().replace('\\', '/'));
OutputStream output = new FileOutputStream(outFile);
output.write(data);
output.close();
}
catch(IOException ex)
{
FMLRelaunchLog.log(Level.WARNING, ex, "Could not save transformed class \"%s\"", transformedName);
}
}
private String untransformName(String name) private String untransformName(String name)
{ {
if (renameTransformer != null) if (renameTransformer != null)