gcc/libjava/java/lang/natVMClassLoader.cc

// natVMClassLoader.cc - VMClassLoader native methods

/* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005  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.  */

/* Author: Kresten Krab Thorup <krab@gnu.org>  */

#include <config.h>

#include <stdlib.h>
#include <string.h>

#include <gcj/cni.h>
#include <jvm.h>

#include <java-threads.h>
#include <java-interp.h>

#include <java/lang/VMClassLoader.h>
#include <java/lang/VMCompiler.h>
#include <gnu/gcj/runtime/VMClassLoader.h>
#include <gnu/gcj/runtime/SystemClassLoader.h>
#include <gnu/gcj/runtime/BootClassLoader.h>
#include <java/lang/ClassLoader.h>
#include <java/lang/Class.h>
#include <java/lang/Throwable.h>
#include <java/security/ProtectionDomain.h>
#include <java/lang/ClassFormatError.h>

void
java::lang::VMClassLoader::resolveClass (jclass klass)
{
  JvSynchronize sync (klass);
  try
    {
      _Jv_Linker::wait_for_state (klass, JV_STATE_LINKED);
    }
  catch (java::lang::Throwable *x)
    {
      klass->set_state(JV_STATE_ERROR);
      transformException(klass, x);
    }
}

java::lang::Class *
java::lang::VMClassLoader::defineClass (java::lang::ClassLoader *loader,
					jstring name,
					jbyteArray data, 
					jint offset,
					jint length,
					java::security::ProtectionDomain *pd)
{
  jclass klass = VMCompiler::compileClass(loader, name, data,
					  offset, length, pd);

#ifdef INTERPRETER
  if (klass == NULL)
    {
      klass = new java::lang::Class ();

      // Synchronize on the class, so that it is not attempted initialized
      // until we're done loading.
      JvSynchronize sync (klass);

      // Record the defining loader.  For the bootstrap class loader,
      // we record NULL.
      if (loader != bootLoader)
	klass->loader = loader;

      if (name != 0)
	{
	  _Jv_Utf8Const *name2 = _Jv_makeUtf8Const (name);

	  if (! _Jv_VerifyClassName (name2))
	    throw new java::lang::ClassFormatError
	      (JvNewStringLatin1 ("erroneous class name"));

	  klass->name = name2;
	}

      try
	{
	  _Jv_DefineClass (klass, data, offset, length, pd);
	}
      catch (java::lang::Throwable *ex)
	{
	  klass->state = JV_STATE_ERROR;
	  klass->notifyAll ();

	  _Jv_UnregisterInitiatingLoader (klass, klass->loader);

	  // If EX is not a ClassNotFoundException, that's ok, because we
	  // account for the possibility in defineClass().
	  throw ex;
	}

      // if everything proceeded sucessfully, we're loaded.
      JvAssert (klass->state == JV_STATE_LOADED);
    }
#endif // INTERPRETER

  return klass;
}

java::lang::ClassLoader *
java::lang::VMClassLoader::getSystemClassLoaderInternal()
{
  _Jv_InitClass (&gnu::gcj::runtime::VMClassLoader::class$);
  return gnu::gcj::runtime::VMClassLoader::system_instance;
}

jclass
java::lang::VMClassLoader::getPrimitiveClass (jchar type)
{
  char sig[2];
  sig[0] = (char) type;
  sig[1] = '\0';
  return _Jv_FindClassFromSignature (sig, NULL);
}

void
java::lang::VMClassLoader::initBootLoader(jstring libdir)
{
  bootLoader = new gnu::gcj::runtime::BootClassLoader(libdir);
}

jclass
java::lang::VMClassLoader::loadClass(jstring name, jboolean resolve)
{
  // We try the boot loader first, so that the endorsed directory
  // overrides compiled-in classes.
  jclass klass = NULL;
  if (bootLoader)
    klass = bootLoader->bootLoadClass(name);
  if (! klass)
    {
      _Jv_Utf8Const *utf = _Jv_makeUtf8Const (name);
      klass = _Jv_FindClassInCache (utf);
    }
  if (klass)
    {
      // We never want to return a class without its supers linked.
      // It isn't clear from the spec, but this is what other
      // implementations do in practice.
      if (resolve)
	_Jv_InitClass (klass);
      else
	_Jv_Linker::wait_for_state (klass, JV_STATE_LOADING);

      definePackageForNative(name);
    }

  return klass;
}