1 files changed, 151 insertions, 0 deletions
diff --git a/libjava/gnu/gcj/runtime/natSharedLibLoader.cc b/libjava/gnu/gcj/runtime/natSharedLibLoader.cc
new file mode 100644
index 000000000..5ae6842d6
--- /dev/null
+++ b/libjava/gnu/gcj/runtime/natSharedLibLoader.cc
@@ -0,0 +1,151 @@
+// natSharedLibLoader.cc - Implementation of SharedLibHelper native methods.
+
+/* Copyright (C) 2001, 2003, 2004, 2005, 2006, 2010  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.  */
+
+#include <config.h>
+#include <platform.h>
+
+#include <gcj/cni.h>
+#include <jvm.h>
+#include <execution.h>
+
+#include <gnu/gcj/runtime/SharedLibHelper.h>
+#include <java/io/IOException.h>
+#include <java/lang/UnsupportedOperationException.h>
+#include <java/lang/UnknownError.h>
+
+#include <java/lang/VMClassLoader.h>
+
+// If we're using the Boehm GC, then we need this include to override dlopen.
+#ifdef HAVE_BOEHM_GC
+// Set GC_DEBUG before including gc.h!
+#ifdef LIBGCJ_GC_DEBUG
+# define GC_DEBUG
+#endif
+#include <gc.h>
+#endif /* HAVE_BOEHM_GC */
+
+#ifdef HAVE_DLOPEN
+#include <dlfcn.h>
+
+/* Only used during dlopen, while having a lock on Class.class. */
+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)
+{
+  cls->protectionDomain = curHelper->domain;
+  cls->loader = curLoader;
+  if (! cls->engine)
+    cls->engine = &_Jv_soleCompiledEngine;
+  curHelper->registerClass(cls->getName(), cls);
+}
+
+static void
+core_hook (_Jv_core_chain *chain)
+{
+  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::SharedLibHelper::init(void)
+{
+#ifdef HAVE_DLOPEN
+  char *lname = (char *) __builtin_alloca (JvGetStringUTFLength (baseName)
+					   + 1);
+  jsize total = JvGetStringUTFRegion (baseName, 0, baseName->length(), lname);
+  lname[total] = '\0';
+
+  if (flags==0)
+    flags = RTLD_GLOBAL | RTLD_LAZY;
+  JvSynchronize dummy1(&::java::lang::Class::class$);
+  SharedLibDummy dummy2;
+  curLoader = ((void*)loader == ::java::lang::VMClassLoader::bootLoader
+	       ? NULL : 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();
+      throw new ::java::lang::UnknownError(JvNewStringLatin1(msg));
+    }
+  handler = (gnu::gcj::RawData*) h;
+#else
+  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
+}
+
+#ifdef HAVE_DLOPEN
+extern gnu::gcj::Core *_Jv_create_core (_Jv_core_chain *node, jstring name);
+#endif
+
+gnu::gcj::Core *
+gnu::gcj::runtime::SharedLibHelper::findCore (jstring name)
+{
+#ifdef HAVE_DLOPEN
+  ensureInit();
+  return _Jv_create_core ((_Jv_core_chain *) core_chain, name);
+#else
+  return NULL;
+#endif
+}
+
+void
+gnu::gcj::runtime::SharedLibHelper::finalize()
+{
+  _Jv_FreeCoreChain ((_Jv_core_chain *) core_chain);
+#ifdef HAVE_DLOPEN
+  if (handler)
+    dlclose (handler);
+#endif
+}
+
+void
+gnu::gcj::runtime::SharedLibHelper::ensureSupersLinked(jclass k)
+{
+  _Jv_Linker::wait_for_state (k, JV_STATE_LOADING);
+}