re PR libgcj/25187 (dereferencing type-punned pointer warnings while building libgcj)

2006-02-08  Bryce McKinlay  <mckinlay@redhat.com>

        PR libgcj/25187:
        * gnu/gcj/io/natSimpleSHSStream.cc
        (gnu::gcj::io::SimpleSHSStream::shsFinal): Remove bogus cast.
        * interpret.cc (_Jv_InterpMethod::run): Simplify arguments to
        _Jv_InterpFrame().
        * boehm.cc: #undef some autoconf macros before including gc-config.h.
        (_Jv_MarkObject): Don't mark the class, it is reachable via the vtable.
        (_Jv_MarkArray): Likewise.
        * java/lang/ref/natReference.cc (java::lang::ref::Reference::create):
        Simplify _Jv_GCRegisterDisappearingLink() call.
        * java/lang/Class.h (getComponentType): Use element_type.
        (element_type): New field declaration, as a union with "methods".
        * java/lang/natClassLoader.cc (_Jv_NewArrayClass): Use "element_type".
        * java/net/natVMNetworkInterfacePosix.cc
        (java::net::VMNetworkInterface::getInterfaces): Add "int" cast to
        avoid sign comparison warning.
        * include/java-interp.h (_Jv_InterpFrame): Take thread as second
        argument, not parent call frame.
        * include/x86_64-signal.h (MAKE_THROW_FRAME): Use "gregs" directly,
        without a cast.
        (restore_rt): Declare with hidden visibility, not "static".
        * posix.cc (_Jv_platform_initProperties): Make "tmpdir" a string
        constant.
        * jni.cc (_Jv_JNI_DestroyJavaVM): Use a union to avoid strict alias
        warning

From-SVN: r110783

libjava/java/lang/Class.h

@@ -368,7 +368,7 @@ public:
 
   inline jclass getComponentType (void)
     {
-      return isArray () ? (* (jclass *) &methods) : 0;
+      return isArray () ? element_type : 0;
     }
 
   jboolean isAssignableFrom (jclass cls);
@@ -554,7 +554,11 @@ private:
   _Jv_Constants constants;
   // Methods.  If this is an array class, then this field holds a
   // pointer to the element type.
-  _Jv_Method *methods;
+  union
+  {
+    _Jv_Method *methods;
+    jclass element_type;
+  };
   // Number of methods.  If this class is primitive, this holds the
   // character used to represent this type in a signature.
   jshort method_count;

libjava/java/lang/natClassLoader.cc

@@ -458,7 +458,7 @@ _Jv_NewArrayClass (jclass element, java::lang::ClassLoader *loader,
     = java::lang::Object::class$.vtable_method_count;
 
   // Stash the pointer to the element type.
-  array_class->methods = (_Jv_Method *) element;
+  array_class->element_type = element;
 
   // Register our interfaces.
   static jclass interfaces[] =

libjava/java/lang/ref/natReference.cc

@@ -363,8 +363,8 @@ void
       // finalizer for ourselves as well.
       _Jv_RegisterFinalizer (this, finalize_reference);
       _Jv_RegisterFinalizer (referent, finalize_referred_to_object);
-      jobject *objp = reinterpret_cast<jobject *> (&referent);
-      _Jv_GCRegisterDisappearingLink (objp);
+      gnu::gcj::RawData **p = &referent;
+     _Jv_GCRegisterDisappearingLink ((jobject *) p);
       add_to_hash (this);
     }
 }

libjava/java/net/natVMNetworkInterfacePosix.cc

@@ -75,7 +75,7 @@ java::net::VMNetworkInterface::getInterfaces ()
       if (::ioctl (fd, SIOCGIFCONF, &if_data) < 0)
         throw new java::net::SocketException;
     }
-  while (if_data.ifc_len >= (sizeof (struct ifreq) * num_interfaces));
+  while (if_data.ifc_len >= (int) (sizeof (struct ifreq) * num_interfaces));
 
   // Get addresses of all interfaces.
   if_record = if_data.ifc_req;