Mercurial > hg > truffle
view test/runtime/6626217/Loader2.java @ 3293:1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
Summary: In G1 heap verification, we no longer scan perm to G1-collected heap refs as part of process_strong_roots() but rather in a separate explicit oop iteration over the perm gen. This preserves the original perm card-marks. Added a new assertion in younger_refs_iterate() to catch a simple subcase where the user may have forgotten a prior save_marks() call, as happened in the case of G1's attempt to iterate perm to G1 refs when verifying the heap before exit. The assert was deliberately weakened for ParNew+CMS and will be fixed for that combination in a future CR. Also made some (non-G1) cleanups related to code and comments obsoleted by the migration of Symbols to the native heap.
Reviewed-by: iveresov, jmasa, tonyp
author | ysr |
---|---|
date | Tue, 26 Apr 2011 21:17:24 -0700 |
parents | 495caa35b1b5 |
children |
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import java.io.ByteArrayInputStream; import java.io.FileInputStream; public class Loader2 extends ClassLoader { int _recur; public void print( String msg ) { for( int i=0; i<_recur; i++ ) System.out.print(" "); System.out.println(">>Loader2>> "+msg); } protected Class findClass2(String name) throws ClassNotFoundException { print("Fetching the implementation of "+name); int old = _recur; try { FileInputStream fi = new FileInputStream(name+".impl2"); byte result[] = new byte[fi.available()]; fi.read(result); print("DefineClass1 on "+name); _recur++; Class clazz = defineClass(name, result, 0, result.length); _recur = old; print("Returning newly loaded class."); return clazz; } catch (Exception e) { _recur = old; print("Not found on disk."); // If we caught an exception, either the class was not found or // it was unreadable by our process. return null; //throw new ClassNotFoundException(e.toString()); } } protected synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException { // Attempt a disk load first Class c = findClass2(name); if( c == null ) { // check if the class has already been loaded print("Checking for prior loaded class "+name); c = findLoadedClass(name); print("Letting super-loader load "+name); int old = _recur; _recur++; c = super.loadClass(name, false); _recur=old; } if (resolve) { print("Resolving class "+name); resolveClass(c); } print("Returning clazz "+c.getClassLoader()+":"+name); return c; } }