Makefile.in: Rebuilt.

* Makefile.in: Rebuilt. * Makefile.am (ordinary_java_source_files): Added new files. * java/lang/Class.h (_Jv_sharedlib_register_hook): Declare as friend. * java/net/URLClassLoader.java (findClass): Don't use findURLResource. Use loader's getClass method. (URLLoader.getClass): New method. (addURL): Handle `gcjlib' URLs. (SoURLLoader): New class. (SoResource): Likewise. * gnu/gcj/protocol/gcjlib/Connection.java: New file. * gnu/gcj/protocol/gcjlib/Handler.java: New file. * include/jvm.h (struct _Jv_core_chain): Moved from natCore.cc. (_Jv_RegisterCoreHook): Declare. (_Jv_FindCore): Declare. * gnu/gcj/runtime/SharedLibHelper.java: New file. * gnu/gcj/runtime/natSharedLibLoader.cc (CoreHookFunc): New typedef. (core_hook): New function. (struct SharedLibDummy) [saved_core]: New field. (init): Set _Jv_RegisterCoreHook. Throw exception on failure. (register_hook): Set protection domain and class loader on new class. (finalize): Free core chain. * gnu/gcj/Core.java (Core): New constructor. * gnu/gcj/runtime/SharedLibLoader.java: Rewrote to use SharedLibHelper. * gnu/gcj/natCore.cc (_Jv_RegisterResource): Indentation fixlet. (_Jv_create_core): New function. (create): Use it. (default_register_resource): New function. (_Jv_RegisterCoreHook): New global. (_Jv_RegisterResource): Use it. (core_chain_struct): Removed. (_Jv_FindCore): New function. (_Jv_FreeCoreChain): New function. From-SVN: r70892
author: Tom Tromey <tromey@redhat.com> 2003-08-28 22:17:37 +0000
committer: Tom Tromey <tromey@gcc.gnu.org> 2003-08-28 22:17:37 +0000
commit: 91edd042ff3b7b58be7c20bf7483445f60c43210 (patch)
tree: a5d84d77e14c8eed9bc348be5e03ab4e6490a077 /libjava/gnu/gcj/runtime
parent: ff2865f2dde326797f4061c32c19fc75dcd4fec5 (diff)
download: gcc-91edd042ff3b7b58be7c20bf7483445f60c43210.zip
gcc-91edd042ff3b7b58be7c20bf7483445f60c43210.tar.gz
gcc-91edd042ff3b7b58be7c20bf7483445f60c43210.tar.bz2
3 files changed, 240 insertions, 48 deletions
diff --git a/libjava/gnu/gcj/runtime/SharedLibHelper.java b/libjava/gnu/gcj/runtime/SharedLibHelper.java
new file mode 100644
index 0000000..9e170a1
--- /dev/null
+++ b/libjava/gnu/gcj/runtime/SharedLibHelper.java
@@ -0,0 +1,144 @@
+/* Copyright (C) 2001, 2003  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.runtime;
+import java.lang.ref.WeakReference;
+import java.net.URL;
+import java.net.MalformedURLException;
+import java.util.HashMap;
+import java.security.*;
+import gnu.gcj.Core;
+
+public class SharedLibHelper
+{
+  /** Load a shared library, and associate a ClassLoader with it.
+   * @param libname named of shared library (passed to dlopen)
+   * @param parent the parent ClassLoader
+   * @parem flags passed to dlopen
+   */
+  SharedLibHelper(String libname, ClassLoader parent, CodeSource source,
+		  int flags)
+  {
+    // FIXME: ask security manager first.
+    loader = parent;
+    baseName = libname;
+    domain = new ProtectionDomain(source,
+				  Policy.getPolicy().getPermissions(source));
+    this.flags = flags;
+  }
+
+  public static SharedLibHelper findHelper (String libname)
+  {
+    synchronized (map)
+      {
+	WeakReference ref = (WeakReference) map.get(libname);
+	if (ref != null)
+	  return (SharedLibHelper) ref.get();
+	return null;
+      }
+  }
+
+  public static SharedLibHelper findHelper (ClassLoader loader, String libname,
+					    CodeSource source)
+  {
+    synchronized (map)
+      {
+	SharedLibHelper result;
+	WeakReference ref = (WeakReference) map.get(libname);
+	if (ref != null)
+	  {
+	    result = (SharedLibHelper) ref.get();
+	    if (result != null)
+	      {
+		if (result.loader != loader)
+		  // FIXME
+		  throw new UnknownError();
+		return result;
+	      }
+	  }
+
+	result = new SharedLibHelper(libname, loader, source, 0);
+	map.put(libname, new WeakReference(result));
+	return result;
+      }
+  }
+
+  public native void finalize ();
+
+  public Class findClass(String name)
+  {
+    ensureInit();
+    return (Class) classMap.get(name);
+  }
+
+  public URL findResource (String name)
+  {
+    ensureInit();
+    if (! hasResource(name))
+      return null;
+    try
+      {
+	return new URL("gcjlib", "", -1, baseName + "!/" + name);
+      }
+    catch (MalformedURLException _)
+      {
+      }
+    return null;
+  }
+
+  public native Core findCore (String name);
+
+  void ensureInit()
+  {
+    synchronized (classMap)
+      {
+	if (initialized)
+	  return;
+	init();
+	initialized = true;
+      }
+  }
+
+  native boolean hasResource(String name);
+  native void init();
+
+  /** Called during dlopen's processing of the init section. */
+  void registerClass(String name, Class cls)
+  {
+    classMap.put(name, cls);
+  }
+
+  /** The handle returned by dlopen. */
+  gnu.gcj.RawData handler;
+
+  /** Holds a _Jv_core_chain for the loader.  */
+  gnu.gcj.RawData core_chain;
+
+  /** Map classnames to Classes. */
+  HashMap classMap = new HashMap(20);
+
+  /** Class loader we're helping.  */
+  ClassLoader loader;
+
+  /** Name of base file.  */
+  String baseName;
+
+  /** Protection domain for loaded classes.  */
+  ProtectionDomain domain;
+
+  /** Flags to pass to dlopen.  FIXME: platform dependent.
+      0 is always "sensible" (defined by us).  */
+  int flags;
+
+  /** True if we've been initialized.  */
+  boolean initialized = false;
+
+  /** Map shared library names to a helper object.  This uses weak
+      references in the values so we don't prevent collection.  */
+  static HashMap map = new HashMap ();
+}
diff --git a/libjava/gnu/gcj/runtime/SharedLibLoader.java b/libjava/gnu/gcj/runtime/SharedLibLoader.java
index cfcd04e..1f80bbc 100644
--- a/libjava/gnu/gcj/runtime/SharedLibLoader.java
+++ b/libjava/gnu/gcj/runtime/SharedLibLoader.java
@@ -7,7 +7,12 @@ Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
 details.  */
 
 package gnu.gcj.runtime;
-import java.util.Hashtable;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.security.CodeSource;
+import java.util.Enumeration;
+import java.util.Vector;
 
 /**
  * A ClassLoader backed by a gcj-compiled shared library.
@@ -16,55 +21,59 @@ import java.util.Hashtable;
 
 public class SharedLibLoader extends ClassLoader
 {
-  public native void finalize ();
-
-  /** Called during dlopen's processing of the init section. */
-  void registerClass(String name, Class cls)
-  {
-    classMap.put(name, cls);
-  }
-
   /** Load a shared library, and associate a ClassLoader with it.
    * @param libname named of shared library (passed to dlopen)
    * @param parent the parent ClassLoader
-   * @param flags passed to dlopen
+   * @parem flags passed to dlopen
    */
   public SharedLibLoader(String libname, ClassLoader parent, int flags)
   {
     super(parent);
-    init(libname, flags);
+    URL url;
+    try
+      {
+	url = new URL("file", "", libname);
+      }
+    catch (MalformedURLException _)
+      {
+	url = null;
+      }
+    helper = SharedLibHelper.findHelper(this, libname,
+					new CodeSource(url, null));
   }
 
-
   /** Load a shared library, and asociate a ClassLoader with it.
    * @param libname named of shared library (passed to dlopen)
    */
   public SharedLibLoader(String libname)
   {
-    super(getSystemClassLoader());
-    init(libname, 0);
-  }
-
-  native void init(String libname, int flags);
-
-  public Class loadClass(String name)
-    throws ClassNotFoundException
-  {
-    return super.loadClass(name);
+    this(libname, getSystemClassLoader(), 0);
   }
 
   public Class findClass(String name)
     throws ClassNotFoundException
   {
-    Object cls = classMap.get(name);
+    Class cls = helper.findClass(name);
     if (cls == null)
       throw new ClassNotFoundException(name);
-    return (Class) cls;
+    return cls;
   }
 
-  /** The handle returned by dlopen. */
-  gnu.gcj.RawData handler;
+  public URL findResource (String name)
+  {
+    return helper.findResource(name);
+  }
+
+  public Enumeration findResources (String name) throws IOException
+  {
+    URL url = findResource(name);
+    if (url == null)
+      return null;
+    Vector v = new Vector(1);
+    v.add(url);
+    return v.elements();
+  }
 
-  /** Map classnames to Classes. */
-  Hashtable classMap = new Hashtable(20);
+  /** The helper that does the work for us.  */
+  SharedLibHelper helper;
 }
diff --git a/libjava/gnu/gcj/runtime/natSharedLibLoader.cc b/libjava/gnu/gcj/runtime/natSharedLibLoader.cc
index 49bcfb4..46eef75 100644
--- a/libjava/gnu/gcj/runtime/natSharedLibLoader.cc
+++ b/libjava/gnu/gcj/runtime/natSharedLibLoader.cc
@@ -1,4 +1,4 @@
-// natSharedLibLoader.cc - Implementation of FirstThread native methods.
+// natSharedLibLoader.cc - Implementation of SharedLibHelper native methods.
 
 /* Copyright (C) 2001, 2003  Free Software Foundation
 
@@ -11,74 +11,113 @@ details.  */
 #include <config.h>
 
 #include <gcj/cni.h>
-#include <gnu/gcj/runtime/SharedLibLoader.h>
+#include <jvm.h>
+#include <gnu/gcj/runtime/SharedLibHelper.h>
 #include <java/io/IOException.h>
 #include <java/lang/UnsupportedOperationException.h>
-#include <java/lang/UnsatisfiedLinkError.h>
+#include <java/lang/UnknownError.h>
 
 #ifdef HAVE_DLOPEN
 #include <dlfcn.h>
 
 /* Only used during dlopen, while having a lock on Class.class. */
-static gnu::gcj::runtime::SharedLibLoader* curLoader;
+static java::lang::ClassLoader *curLoader;
+static gnu::gcj::runtime::SharedLibHelper *curHelper;
 
 typedef void (*ClassHookFunc) (jclass);
+typedef void (*CoreHookFunc) (_Jv_core_chain *);
+
+void
+_Jv_sharedlib_register_hook (jclass cls)
+{
+  curHelper->registerClass(cls->getName(), cls);
+  cls->protectionDomain = curHelper->domain;
+  cls->loader = curLoader;
+}
 
 static void
-::register_hook(jclass cls)
+core_hook (_Jv_core_chain *chain)
 {
-  curLoader->registerClass(cls->getName(), cls);
+  chain->next = (_Jv_core_chain *) curHelper->core_chain;
+  curHelper->core_chain = (gnu::gcj::RawData *) chain;
 }
 
 struct SharedLibDummy
 {
   ClassHookFunc saved;
+  CoreHookFunc saved_core;
   SharedLibDummy()
   {
     saved = _Jv_RegisterClassHook;
+    saved_core = _Jv_RegisterCoreHook;
   }
   ~SharedLibDummy()
   {
     _Jv_RegisterClassHook = saved;
+    _Jv_RegisterCoreHook = saved_core;
     curLoader = NULL;
   }
 };
 #endif
 
 void
-gnu::gcj::runtime::SharedLibLoader::init(jstring libname, jint flags)
+gnu::gcj::runtime::SharedLibHelper::init(void)
 {
 #ifdef HAVE_DLOPEN
-  jint len = _Jv_GetStringUTFLength (libname);
-  char lname[len + 1];
-  JvGetStringUTFRegion (libname, 0, libname->length(), lname);
-  lname[len] = '\0';
+  char *lname = (char *) __builtin_alloca (JvGetStringUTFLength (baseName)
+					   + 1);
+  jsize total = JvGetStringUTFRegion (baseName, 0, baseName->length(), lname);
+  lname[total] = '\0';
 
   if (flags==0)
-    flags = RTLD_LAZY;
+    flags = RTLD_GLOBAL | RTLD_LAZY;
   JvSynchronize dummy1(&java::lang::Class::class$);
   SharedLibDummy dummy2;
-  curLoader = this;
-  _Jv_RegisterClassHook = ::register_hook;
+  curLoader = loader;
+  curHelper = this;
+  _Jv_RegisterClassHook = _Jv_sharedlib_register_hook;
+  _Jv_RegisterCoreHook = core_hook;
   void *h = dlopen(lname, flags);
   if (h == NULL)
     {
       const char *msg = dlerror();
-      jstring str = JvNewStringLatin1 (lname);
-      str = str->concat (JvNewStringLatin1 (": "));
-      str = str->concat (JvNewStringLatin1 (msg));
-      throw new java::lang::UnsatisfiedLinkError (str);
+      throw new java::lang::UnknownError(JvNewStringLatin1(msg));
     }
   handler = (gnu::gcj::RawData*) h;
 #else
-  const char *msg = "SharedLibLoader is not supported on this platform";
+  const char *msg
+    = "shared library class loading is not supported on this platform";
   throw new java::lang::UnsupportedOperationException(JvNewStringLatin1(msg));
 #endif
 }
 
+jboolean
+gnu::gcj::runtime::SharedLibHelper::hasResource (jstring name)
+{
+#ifdef HAVE_DLOPEN
+  _Jv_core_chain *node = _Jv_FindCore ((_Jv_core_chain *) core_chain, name);
+  return node != NULL;
+#else
+  return false;
+#endif
+}
+
+gnu::gcj::Core *
+gnu::gcj::runtime::SharedLibHelper::findCore (jstring name)
+{
+#ifdef HAVE_DLOPEN
+  extern gnu::gcj::Core *_Jv_create_core (_Jv_core_chain *node, jstring name);
+  ensureInit();
+  return _Jv_create_core ((_Jv_core_chain *) core_chain, name);
+#else
+  return NULL;
+#endif
+}
+
 void
-gnu::gcj::runtime::SharedLibLoader::finalize()
+gnu::gcj::runtime::SharedLibHelper::finalize()
 {
+  _Jv_FreeCoreChain ((_Jv_core_chain *) core_chain);
 #ifdef HAVE_DLOPEN
   dlclose (handler);
 #endif
author	Tom Tromey <tromey@redhat.com>	2003-08-28 22:17:37 +0000
committer	Tom Tromey <tromey@gcc.gnu.org>	2003-08-28 22:17:37 +0000
commit	91edd042ff3b7b58be7c20bf7483445f60c43210 (patch)
tree	a5d84d77e14c8eed9bc348be5e03ab4e6490a077 /libjava/gnu/gcj/runtime
parent	ff2865f2dde326797f4061c32c19fc75dcd4fec5 (diff)
download	gcc-91edd042ff3b7b58be7c20bf7483445f60c43210.zip gcc-91edd042ff3b7b58be7c20bf7483445f60c43210.tar.gz gcc-91edd042ff3b7b58be7c20bf7483445f60c43210.tar.bz2