From 12b10e48ae86a8fe82840247428254aea62e370b Mon Sep 17 00:00:00 2001
From: adam <adam@megacz.com>
Date: Mon, 23 Feb 2004 12:45:44 +0000
Subject: [PATCH] totally working again

darcs-hash:20040223124544-5007d-9ba772cfadc63c6ddf5cae3e5782d251ad6dbaaa.gz
---
 Makefile                              |    2 +-
 src/org/ibex/util/BytecodePruner.java |  164 ++++++++++++++++++++++-----------
 2 files changed, 110 insertions(+), 56 deletions(-)

diff --git a/Makefile b/Makefile
index f64d42f..e8781fe 100644
--- a/Makefile
+++ b/Makefile
@@ -240,7 +240,7 @@ build/$(platform)/$(target_bin): .compile build/$(platform)/builtin.o build/$(pl
 	java -cp lib/bcel-5.1.jar:build/class org.ibex.util.BytecodePruner \
 		build/$(platform)/ibex.jar:upstream/install/share/java/libgcj-3.3.jar \
 		-o build/pruned \
-		`cat .natcalls | grep -v ^gcj` org.ibex.plat.Linux.main
+		`cat .natcalls`
 
 #	rm -rf build/pruned/org/ibex/js/*; cp build/java/org/ibex/js/* build/pruned/org/ibex/js/
 
diff --git a/src/org/ibex/util/BytecodePruner.java b/src/org/ibex/util/BytecodePruner.java
index 9dbae75..4514cb4 100644
--- a/src/org/ibex/util/BytecodePruner.java
+++ b/src/org/ibex/util/BytecodePruner.java
@@ -7,13 +7,6 @@ import org.apache.bcel.generic.*;
 import org.apache.bcel.classfile.*;
 import org.apache.bcel.util.*;
 
-        // SecurityManager hacks to avoid java.security?
-        // URL and all descendents?  Probably impossible.
-        // ObjectInput/ObjectOutput?  Serialization?
-
-        // superprune: URLClassLoader, convert.In/Output other than needed, unneeded locales
-        // reflective metadata is killing us...
-
 // Reachability rules:
 
 // - a constructor is reachable iff it is called
@@ -35,8 +28,12 @@ import org.apache.bcel.util.*;
 public class BytecodePruner {
 
     public static final boolean deleteMethods = false;
+
+    // FIXME
     public static SyntheticRepository repo = null;
+
     public static HashSet dest = new HashSet();
+
     public static String outdir = ".";
 
     public void loadAllMethods(String classname) throws Exception {
@@ -44,39 +41,106 @@ public class BytecodePruner {
         Method[] meths = getMethods(repo.loadClass(classname));
         for(int i=0; i<meths.length; i++) visitJavaMethod(repo.loadClass(classname), meths[i]);
     }
-
     public void loadMethod(String classAndMethodName) throws Exception {
         String classname = classAndMethodName.substring(0, classAndMethodName.lastIndexOf('.'));
         String methodname = classAndMethodName.substring(classAndMethodName.lastIndexOf('.') + 1);
-        if (classname.endsWith("." + methodname)) methodname = "<init>";
         visitJavaClass(repo.loadClass(classname));
         Method[] meths = getMethods(repo.loadClass(classname));
         for(int i=0; i<meths.length; i++)
             if (meths[i].getName().equals(methodname))
                 visitJavaMethod(repo.loadClass(classname), meths[i]);
     }
-
     public static void main(String[] s) throws Exception {
-        BytecodePruner bcp = new BytecodePruner();
         int start = 1;
         if (s.length >= 3 && s[1].equals("-o")) { outdir = s[2]; start += 2; }
         repo = SyntheticRepository.getInstance(new ClassPath(s[0]));
-        for(int i=start; i<s.length; i++)
-            if (s[i].endsWith(".class")) bcp.visitJavaClass(repo.loadClass(s[i].substring(0, s[i].length() - 6)));
-            else bcp.loadMethod(s[i]);
 
-        bcp.loadMethod("java.lang.Thread.run");                                // we call start(), but the VM calls run()...
-        bcp.loadAllMethods("gnu.gcj.runtime.StringBuffer");                    // the compiler emits calls directly to this class
+        BytecodePruner bcp = new BytecodePruner();
+        for(int i=start; i<s.length; i++) {
+            try {
+                if (s[i].endsWith(".class")) {
+                    bcp.visitJavaClass(repo.loadClass(s[i].substring(0, s[i].length() - 6)));
+                } else {
+                    JavaClass cl = repo.loadClass(s[i].substring(0, s[i].lastIndexOf('.')));;
+                    bcp.visitJavaClass(cl);
+                    Method[] meths = getMethods(cl);
+                    for(int j=0; j<meths.length; j++) {
+                        if (meths[j].getName().equals(s[i].substring(s[i].lastIndexOf('.') + 1)))
+                            bcp.visitJavaMethod(cl, meths[j]);
+                    }
+                }
+            } catch (Exception e) {
+                System.out.println("WARNING: couldn't load class for " + s[i]);
+            }
+        }
+
+        System.out.println("\n\n======================================================================\n");
+
+        // we call start(), but the VM calls run()...
+        bcp.loadMethod("java.lang.Thread.run");
         bcp.loadAllMethods("java.lang.SecurityContext");
-        bcp.loadAllMethods("java.lang.ThreadDeath");
         bcp.visitJavaClass(repo.loadClass("java.awt.AWTPermission"));
         bcp.visitJavaClass(repo.loadClass("gnu.classpath.Configuration"));
+        bcp.loadAllMethods("java.lang.ThreadDeath");
+
         bcp.loadAllMethods("java.util.Hashtable$HashIterator");
         bcp.loadMethod("java.util.SimpleTimeZone.useDaylightTime");
+        /*
+        bcp.loadAllMethods("java.lang.Throwable");
+        bcp.loadAllMethods("java.io.PrintStream");
+        bcp.loadAllMethods("java.util.PropertyPermission");
+        bcp.loadAllMethods("java.security.cert.Certificate");
+        bcp.loadAllMethods("java.security.cert.CertificateEncodingException");
+        bcp.loadMethod("java.util.TimeZone.getAvailableIDs");
+        bcp.loadMethod("java.util.TimeZone.getDefaultTimeZoneId");
+        bcp.loadAllMethods("gnu.gcj.runtime.StringBuffer");
+        bcp.loadAllMethods("gnu.gcj.runtime.VMClassLoader");
+        bcp.visitJavaClass(repo.loadClass("gnu.gcj.runtime.JNIWeakRef"));
+        */
+        /*
+        bcp.visitJavaClass(repo.loadClass("gnu.gcj.protocol.http.Handler"));
+        bcp.visitJavaClass(repo.loadClass("gnu.gcj.protocol.file.Handler"));
+        bcp.visitJavaClass(repo.loadClass("gnu.gcj.protocol.jar.Handler"));
+        bcp.visitJavaClass(repo.loadClass("gnu.gcj.protocol.core.Handler"));
+        */
         bcp.visitJavaClass(repo.loadClass("gnu.gcj.runtime.FinalizerThread"));
         bcp.visitJavaClass(repo.loadClass("gnu.gcj.runtime.FirstThread"));
 
-        StringTokenizer st = new StringTokenizer(s[0], ":"); 
+        // SecurityManager hacks to avoid java.security?
+        // URL and all descendents?  Probably impossible.
+        // ObjectInput/ObjectOutput?  Serialization?
+
+        // often called from native subclasses....
+        bcp.loadAllMethods("org.ibex.Surface");
+        bcp.loadAllMethods("org.ibex.Template$TemplateHelper$1");
+        bcp.loadAllMethods("org.ibex.Surface$DoubleBufferedSurface");
+        bcp.loadAllMethods("org.ibex.Surface$3");
+        bcp.loadAllMethods("org.ibex.Surface$2");
+        bcp.loadAllMethods("org.ibex.Picture");
+        bcp.loadAllMethods("org.ibex.PixelBuffer");
+        bcp.loadAllMethods("org.ibex.Platform");
+        bcp.loadAllMethods("org.ibex.Scheduler");
+        bcp.loadAllMethods("org.ibex.plat.X11");
+        bcp.loadAllMethods("org.ibex.plat.X11$X11Picture");
+        bcp.loadAllMethods("org.ibex.plat.X11$X11PixelBuffer");
+        bcp.loadAllMethods("org.ibex.plat.X11$X11Surface");
+        bcp.loadAllMethods("org.ibex.XMLRPC");
+
+        bcp.loadAllMethods("java.util.Date");
+        bcp.loadAllMethods("java.text.DateFormat");
+        bcp.loadAllMethods("java.text.NumberFormat");
+
+
+        Method[] meths = getMethods(repo.loadClass("org.ibex.plat.Linux"));
+        for(int i=0; i<meths.length; i++) {
+            if (meths[i].getName().equals("main"))
+                bcp.visitJavaMethod(repo.loadClass("org.ibex.plat.Linux"), meths[i]);
+        }
+        System.out.println();
+
+        System.out.println("Dumping...");
+
+        StringTokenizer st = new StringTokenizer(s[0], ":");
         while(st.hasMoreTokens()) {
             ZipFile zf = new ZipFile(st.nextToken());
             Enumeration e = zf.entries();
@@ -98,11 +162,10 @@ public class BytecodePruner {
 
         ConstantPoolGen newcpg = new ConstantPoolGen(clazz.getConstantPool());
         ClassGen cg = new ClassGen(clazz);
-        cg.setConstantPool(newcpg);
         InstructionFactory factory = new InstructionFactory(cg, newcpg);
         cg.setMajor(46);
         cg.setMinor(0);
-
+        cg.setConstantPool(newcpg);
         Field[] fields = clazz.getFields();
         int numFields = 0;
         for(int i=0; i<fields.length; i++)
@@ -111,11 +174,17 @@ public class BytecodePruner {
                 fields[i] = null; 
             } else numFields++;
 
+        // superprune: URLClassLoader, convert.In/Output other than needed, unneeded locales
+        // reflective metadata is killing us...
+        
         Method[] methods = getMethods(clazz);
         int numMethods = 0;
         boolean good = false;
         for(int i=0; i<methods.length; i++)
-            if (clazz.getClassName().startsWith("java.io.FileDescriptor")) {
+            if (clazz.getClassName().startsWith("gnu.gcj.runtime.")
+                || clazz.getClassName().startsWith("java.io.FileDescriptor")
+                || clazz.getClassName().startsWith("org.ibex.")
+                || clazz.getClassName().startsWith("java.lang.")) {
                 good = true;
             } else if (dest.contains(methods[i])) {
                 if (!methods[i].getName().equals("<clinit>")) good = true;
@@ -235,8 +304,7 @@ public class BytecodePruner {
         dest.add(method);
         level += 2;
         for(int i=0; i<level; i++) System.out.print(" ");
-        ConstantPool cp = method.getConstantPool();
-        ConstantPoolGen cpg = new ConstantPoolGen(cp);
+        ConstantPoolGen cpg = new ConstantPoolGen(method.getConstantPool());
         System.out.println(jc.getClassName() + "." + getMethodSignature(method, cpg));
         markMethodInSubclasses(jc, method, cpg);
         if (method.getCode() == null) { level -= 2; return; }
@@ -273,15 +341,6 @@ public class BytecodePruner {
             String[] exntypes = method.getExceptionTable().getExceptionNames();
             for(int i=0; i<exntypes.length; i++) load(exntypes[i]);
         }
-        if (method.getCode() != null && method.getCode().getExceptionTable() != null) {
-            CodeException[] exntypes = method.getCode().getExceptionTable();
-
-            for(int i=0; i<exntypes.length; i++) {
-                int index = exntypes[i].getCatchType();
-                if (index == 0) continue;
-                load(Utility.compactClassName(cp.getConstantString(index, Constants.CONSTANT_Class), false));
-            }
-        }
     }
 
     public void visitJavaField(Field field) throws Exception {
@@ -303,30 +362,26 @@ public class BytecodePruner {
         System.out.println(clazz.getClassName() + ".class");
 
         JavaClass superclass = clazz.getSuperClass();
-        for(JavaClass sup = clazz; sup != null; sup = sup.getSuperClass()) {
-            if (sup != clazz) {
-                if (subclasses.get(sup) == null) subclasses.put(sup, new HashSet());
-                ((HashSet)subclasses.get(sup)).add(clazz);
-            }
-            JavaClass[] interfaces = sup.getAllInterfaces();
-            for(int i=0; i<interfaces.length; i++) {
-                if (subclasses.get(interfaces[i]) == null) subclasses.put(interfaces[i], new HashSet());
-                ((HashSet)subclasses.get(interfaces[i])).add(clazz);
-            }
+        JavaClass[] interfaces = clazz.getAllInterfaces();
+        for(JavaClass sup = superclass; sup != null; sup = sup.getSuperClass()) {
+            if (subclasses.get(sup) == null) subclasses.put(sup, new HashSet());
+            ((HashSet)subclasses.get(sup)).add(clazz);
+        }
+        for(int i=0; i<interfaces.length; i++) {
+            if (subclasses.get(interfaces[i]) == null) subclasses.put(interfaces[i], new HashSet());
+            ((HashSet)subclasses.get(interfaces[i])).add(clazz);
         }
 
-        if (clazz.getClassName().startsWith("org.ibex.")) loadAllMethods(clazz.getClassName());
+        if (clazz.getClassName().startsWith("org.ibex."))
+            loadAllMethods(clazz.getClassName());
 
-        for(JavaClass sup = clazz; sup != null; sup = sup.getSuperClass()) {
-            if (sup != clazz) {
-                visitJavaClass(sup);
-                remarkMethods(sup, clazz, cpg);
-            }
-            JavaClass[] interfaces = sup.getAllInterfaces();
-            for(int i=0; i<interfaces.length; i++) {
-                visitJavaClass(interfaces[i]);
-                remarkMethods(interfaces[i], clazz, cpg);
-            }
+        for(JavaClass sup = superclass; sup != null; sup = sup.getSuperClass()) {
+            visitJavaClass(sup);
+            remarkMethods(sup, clazz, cpg);
+        }
+        for(int i=0; i<interfaces.length; i++) {
+            visitJavaClass(interfaces[i]);
+            remarkMethods(interfaces[i], clazz, cpg);
         }
 
         Field[] fields = clazz.getFields();
@@ -349,8 +404,7 @@ public class BytecodePruner {
         String sig = getMethodSignature(m, cpg);
         Method[] submethods = getMethods(subclass);
         for(int j=0; j<submethods.length; j++)
-            //if (getMethodSignature(submethods[j], cpg).equals(sig))
-            if (submethods[j].getName().equals(m.getName()))
+            if (getMethodSignature(submethods[j], cpg).equals(sig))
                 visitJavaMethod(subclass, submethods[j]);
     }
     public void markMethodInSubclasses(JavaClass c, Method m, ConstantPoolGen cpg) throws Exception {
-- 
1.7.10.4