re PR libgcj/23739 (JNI: IsAssignableFrom reverses arguments)

	PR libgcj/23739:
	* testsuite/libjava.jni/pr23739.c: New file.
	* testsuite/libjava.jni/pr23739.java: New file.
	* testsuite/libjava.jni/pr23739.out: New file.
	* jni.cc (_Jv_JNI_IsAssignableFrom): Reversed arguments.
	* java/lang/reflect/natMethod.cc (invoke): Updated.
	* java/lang/natClass.cc (isAssignableFrom): Updated.
	(isInstance): Likewise.
	(_Jv_IsAssignableFrom): Reversed arguments.
	(_Jv_IsInstanceOf): Updated.
	(_Jv_CheckCast): Likewise.
	(_Jv_CheckArrayStore): Likewise.
	(_Jv_IsAssignableFromSlow): Reversed arguments.
	(_Jv_InterfaceAssignableFrom): Likewise.
	* link.cc (verify_type_assertions): Updated.
	* prims.cc (_Jv_CheckAccess): Updated.

From-SVN: r103953

libjava/ChangeLog

+2005-09-06  Tom Tromey  <tromey@redhat.com>
+
+	PR libgcj/23739:
+	* testsuite/libjava.jni/pr23739.c: New file.
+	* testsuite/libjava.jni/pr23739.java: New file.
+	* testsuite/libjava.jni/pr23739.out: New file.
+	* jni.cc (_Jv_JNI_IsAssignableFrom): Reversed arguments.
+	* java/lang/reflect/natMethod.cc (invoke): Updated.
+	* java/lang/natClass.cc (isAssignableFrom): Updated.
+	(isInstance): Likewise.
+	(_Jv_IsAssignableFrom): Reversed arguments.
+	(_Jv_IsInstanceOf): Updated.
+	(_Jv_CheckCast): Likewise.
+	(_Jv_CheckArrayStore): Likewise.
+	(_Jv_IsAssignableFromSlow): Reversed arguments.
+	(_Jv_InterfaceAssignableFrom): Likewise.
+	* link.cc (verify_type_assertions): Updated.
+	* prims.cc (_Jv_CheckAccess): Updated.
+
 2005-09-05  Ranjit Mathew  <rmathew@hotmail.com>
 
 	Testsuite changes for PR java/23431.

libjava/java/lang/natClass.cc

@@ -623,7 +623,7 @@ java::lang::Class::isAssignableFrom (jclass klass)
   // Arguments may not have been initialized, given ".class" syntax.
   _Jv_InitClass (this);
   _Jv_InitClass (klass);
-  return _Jv_IsAssignableFrom (this, klass);
+  return _Jv_IsAssignableFrom (klass, this);
 }
 
 jboolean
@@ -632,7 +632,7 @@ java::lang::Class::isInstance (jobject obj)
   if (! obj)
     return false;
   _Jv_InitClass (this);
-  return _Jv_IsAssignableFrom (this, JV_CLASS (obj));
+  return _Jv_IsAssignableFrom (JV_CLASS (obj), this);
 }
 
 jobject
@@ -964,7 +964,7 @@ _Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface, int method_idx)
 }
 
 jboolean
-_Jv_IsAssignableFrom (jclass target, jclass source)
+_Jv_IsAssignableFrom (jclass source, jclass target)
 {
   if (source == target)
     return true;
@@ -984,7 +984,7 @@ _Jv_IsAssignableFrom (jclass target, jclass source)
       // two interfaces for assignability.
       if (__builtin_expect 
           (source->idt == NULL || source->isInterface(), false))
-        return _Jv_InterfaceAssignableFrom (target, source);
+        return _Jv_InterfaceAssignableFrom (source, target);
 
       _Jv_IDispatchTable *cl_idt = source->idt;
       _Jv_IDispatchTable *if_idt = target->idt;
@@ -1033,19 +1033,19 @@ _Jv_IsAssignableFrom (jclass target, jclass source)
 // superinterface of SOURCE. This is used when SOURCE is also an interface,
 // or a class with no interface dispatch table.
 jboolean
-_Jv_InterfaceAssignableFrom (jclass iface, jclass source)
+_Jv_InterfaceAssignableFrom (jclass source, jclass iface)
 {
   for (int i = 0; i < source->interface_count; i++)
     {
       jclass interface = source->interfaces[i];
       if (iface == interface
-          || _Jv_InterfaceAssignableFrom (iface, interface))
+          || _Jv_InterfaceAssignableFrom (interface, iface))
         return true;      
     }
     
   if (!source->isInterface()
       && source->superclass 
-      && _Jv_InterfaceAssignableFrom (iface, source->superclass))
+      && _Jv_InterfaceAssignableFrom (source->superclass, iface))
     return true;
         
   return false;
@@ -1056,14 +1056,14 @@ _Jv_IsInstanceOf(jobject obj, jclass cl)
 {
   if (__builtin_expect (!obj, false))
     return false;
-  return (_Jv_IsAssignableFrom (cl, JV_CLASS (obj)));
+  return _Jv_IsAssignableFrom (JV_CLASS (obj), cl);
 }
 
 void *
 _Jv_CheckCast (jclass c, jobject obj)
 {
   if (__builtin_expect 
-       (obj != NULL && ! _Jv_IsAssignableFrom(c, JV_CLASS (obj)), false))
+      (obj != NULL && ! _Jv_IsAssignableFrom(JV_CLASS (obj), c), false))
     throw new java::lang::ClassCastException
       ((new java::lang::StringBuffer
 	(obj->getClass()->getName()))->append
@@ -1084,7 +1084,7 @@ _Jv_CheckArrayStore (jobject arr, jobject obj)
 	return;
       jclass obj_class = JV_CLASS (obj);
       if (__builtin_expect 
-          (! _Jv_IsAssignableFrom (elt_class, obj_class), false))
+          (! _Jv_IsAssignableFrom (obj_class, elt_class), false))
 	throw new java::lang::ArrayStoreException
 		((new java::lang::StringBuffer
 		 (JvNewStringUTF("Cannot store ")))->append
@@ -1095,7 +1095,7 @@ _Jv_CheckArrayStore (jobject arr, jobject obj)
 }
 
 jboolean
-_Jv_IsAssignableFromSlow (jclass target, jclass source)
+_Jv_IsAssignableFromSlow (jclass source, jclass target)
 {
   // First, strip arrays.
   while (target->isArray ())
@@ -1129,7 +1129,7 @@ _Jv_IsAssignableFromSlow (jclass target, jclass source)
            {
              // We use a recursive call because we also need to
              // check superinterfaces.
-             if (_Jv_IsAssignableFromSlow (target, source->getInterface (i)))
+             if (_Jv_IsAssignableFromSlow (source->getInterface (i), target))
                return true;
            }
        }

libjava/java/lang/reflect/natMethod.cc

@@ -163,7 +163,7 @@ java::lang::reflect::Method::invoke (jobject obj, jobjectArray args)
   else
     {
       jclass objClass = JV_CLASS (obj);
-      if (! _Jv_IsAssignableFrom (declaringClass, objClass))
+      if (! _Jv_IsAssignableFrom (objClass, declaringClass))
         throw new java::lang::IllegalArgumentException;
     }
 

libjava/jni.cc

@@ -552,7 +552,7 @@ _Jv_JNI_GetSuperclass (JNIEnv *env, jclass clazz)
 static jboolean JNICALL
 _Jv_JNI_IsAssignableFrom (JNIEnv *, jclass clazz1, jclass clazz2)
 {
-  return unwrap (clazz1)->isAssignableFrom (unwrap (clazz2));
+  return unwrap (clazz2)->isAssignableFrom (unwrap (clazz1));
 }
 
 static jint JNICALL

libjava/link.cc

@@ -1620,7 +1620,7 @@ _Jv_Linker::verify_type_assertions (jclass klass)
 	  if (cl1 == NULL || cl2 == NULL)
 	    continue;
 
-          if (! _Jv_IsAssignableFromSlow (cl2, cl1))
+          if (! _Jv_IsAssignableFromSlow (cl1, cl2))
 	    {
 	      jstring s = JvNewStringUTF ("Incompatible types: In class ");
 	      s = s->concat (klass->getName());

libjava/prims.cc

@@ -1557,7 +1557,7 @@ _Jv_CheckAccess (jclass self_klass, jclass other_klass, jint flags)
   return ((self_klass == other_klass)
 	  || ((flags & Modifier::PUBLIC) != 0)
 	  || (((flags & Modifier::PROTECTED) != 0)
-	      && _Jv_IsAssignableFromSlow (other_klass, self_klass))
+	      && _Jv_IsAssignableFromSlow (self_klass, other_klass))
 	  || (((flags & Modifier::PRIVATE) == 0)
 	      && _Jv_ClassNameSamePackage (self_klass->name,
 					   other_klass->name)));

libjava/testsuite/Makefile.in

-# Makefile.in generated by automake 1.9.4 from Makefile.am.
+# Makefile.in generated by automake 1.9.3 from Makefile.am.
 # @configure_input@
 
 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,

libjava/testsuite/libjava.jni/pr23739.c

+#include <stdio.h>
+#include "pr23739.h"
+
+JNIEXPORT void JNICALL
+Java_pr23739_checkOrder (JNIEnv *env, jclass cls, jclass clazz1, jclass clazz2)
+{
+  printf ("B extends A\n");
+  printf ("isAssignableFrom (A, B): %d\n",
+          (*env)->IsAssignableFrom (env, clazz1, clazz2));
+  printf ("isAssignableFrom (B, A): %d\n",
+          (*env)->IsAssignableFrom (env, clazz2, clazz1));
+}

libjava/testsuite/libjava.jni/pr23739.java

+public class pr23739
+{
+  static
+  {
+    System.loadLibrary ("pr23739");
+  }
+
+  public static class A
+  {
+  }
+
+  public static class B extends A
+  {
+  }
+
+  static native void checkOrder (Class clazz1, Class clazz2);
+
+  public static void main (String[] args)
+  {
+    checkOrder (A.class, B.class);
+  }
+}

libjava/testsuite/libjava.jni/pr23739.out

+B extends A
+isAssignableFrom (A, B): 0
+isAssignableFrom (B, A): 1