# HG changeset patch
# User lfoltan
# Date 1422024873 18000
# Node ID f7339cba0a6ad6301e6b9d880fa621e68f02ab86
# Parent  544fb99e00801a903f1aec9fab82021ba5d97984
8067480: Crash in klassItable::initialize_itable_for_interface when running vm.runtime.defmeth.StaticMethodsTest.
Summary: A static method should be skipped in entirety by find_instance_method(), searching should continue to find an overpass method of the same name and signature if present.
Reviewed-by: acorn, hseigel

diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/classfile/verifier.cpp
--- a/hotspot/src/share/vm/classfile/verifier.cpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/classfile/verifier.cpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1950,7 +1950,7 @@
   InstanceKlass* target_instance = InstanceKlass::cast(target_class);
   fieldDescriptor fd;
   if (is_method) {
-    Method* m = target_instance->uncached_lookup_method(field_name, field_sig, Klass::normal);
+    Method* m = target_instance->uncached_lookup_method(field_name, field_sig, Klass::find_overpass);
     if (m != NULL && m->is_protected()) {
       if (!this_class->is_same_class_package(m->method_holder())) {
         return true;
@@ -2487,7 +2487,7 @@
       Method* m = InstanceKlass::cast(ref_klass)->uncached_lookup_method(
         vmSymbols::object_initializer_name(),
         cp->signature_ref_at(bcs->get_index_u2()),
-        Klass::normal);
+        Klass::find_overpass);
       // Do nothing if method is not found.  Let resolution detect the error.
       if (m != NULL) {
         instanceKlassHandle mh(THREAD, m->method_holder());
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/interpreter/linkResolver.cpp
--- a/hotspot/src/share/vm/interpreter/linkResolver.cpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/interpreter/linkResolver.cpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -289,11 +289,11 @@
 // returns first instance method
 // Looks up method in classes, then looks up local default methods
 void LinkResolver::lookup_instance_method_in_klasses(methodHandle& result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
-  Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::normal);
+  Method* result_oop = klass->uncached_lookup_method(name, signature, Klass::find_overpass);
   result = methodHandle(THREAD, result_oop);
   while (!result.is_null() && result->is_static() && result->method_holder()->super() != NULL) {
     KlassHandle super_klass = KlassHandle(THREAD, result->method_holder()->super());
-    result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature, Klass::normal));
+    result = methodHandle(THREAD, super_klass->uncached_lookup_method(name, signature, Klass::find_overpass));
   }
 
   if (klass->oop_is_array()) {
@@ -320,7 +320,8 @@
   // First check in default method array
   if (!resolved_method->is_abstract() &&
     (InstanceKlass::cast(klass())->default_methods() != NULL)) {
-    int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(), name, signature, false);
+    int index = InstanceKlass::find_method_index(InstanceKlass::cast(klass())->default_methods(),
+                                                 name, signature, Klass::find_overpass, Klass::find_static);
     if (index >= 0 ) {
       vtable_index = InstanceKlass::cast(klass())->default_vtable_indices()->at(index);
     }
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/oops/arrayKlass.cpp
--- a/hotspot/src/share/vm/oops/arrayKlass.cpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/oops/arrayKlass.cpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -71,10 +71,13 @@
   return super()->find_field(name, sig, fd);
 }
 
-Method* ArrayKlass::uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const {
+Method* ArrayKlass::uncached_lookup_method(Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode) const {
   // There are no methods in an array klass but the super class (Object) has some
   assert(super(), "super klass must be present");
-  return super()->uncached_lookup_method(name, signature, mode);
+  // Always ignore overpass methods in superclasses, although technically the
+  // super klass of an array, (j.l.Object) should not have
+  // any overpass methods present.
+  return super()->uncached_lookup_method(name, signature, Klass::skip_overpass);
 }
 
 ArrayKlass::ArrayKlass(Symbol* name) {
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/oops/arrayKlass.hpp
--- a/hotspot/src/share/vm/oops/arrayKlass.hpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/oops/arrayKlass.hpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -82,7 +82,7 @@
   Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
 
   // Lookup operations
-  Method* uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const;
+  Method* uncached_lookup_method(Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode) const;
 
   // Casting from Klass*
   static ArrayKlass* cast(Klass* k) {
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/oops/instanceKlass.cpp
--- a/hotspot/src/share/vm/oops/instanceKlass.cpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/oops/instanceKlass.cpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1416,33 +1416,33 @@
 
 // find_method looks up the name/signature in the local methods array
 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const {
-  return find_method_impl(name, signature, false);
+  return find_method_impl(name, signature, find_overpass, find_static);
 }
 
-Method* InstanceKlass::find_method_impl(Symbol* name, Symbol* signature, bool skipping_overpass) const {
-  return InstanceKlass::find_method_impl(methods(), name, signature, skipping_overpass);
+Method* InstanceKlass::find_method_impl(Symbol* name, Symbol* signature,
+                                        OverpassLookupMode overpass_mode, StaticLookupMode static_mode) const {
+  return InstanceKlass::find_method_impl(methods(), name, signature, overpass_mode, static_mode);
 }
 
 // find_instance_method looks up the name/signature in the local methods array
 // and skips over static methods
 Method* InstanceKlass::find_instance_method(
     Array<Method*>* methods, Symbol* name, Symbol* signature) {
-  Method* meth = InstanceKlass::find_method(methods, name, signature);
-  if (meth != NULL && meth->is_static()) {
-      meth = NULL;
-  }
+  Method* meth = InstanceKlass::find_method_impl(methods, name, signature,
+                                                 find_overpass, skip_static);
+  assert(((meth == NULL) || !meth->is_static()), "find_instance_method should have skipped statics");
   return meth;
 }
 
 // find_method looks up the name/signature in the local methods array
 Method* InstanceKlass::find_method(
     Array<Method*>* methods, Symbol* name, Symbol* signature) {
-  return InstanceKlass::find_method_impl(methods, name, signature, false);
+  return InstanceKlass::find_method_impl(methods, name, signature, find_overpass, find_static);
 }
 
 Method* InstanceKlass::find_method_impl(
-    Array<Method*>* methods, Symbol* name, Symbol* signature, bool skipping_overpass) {
-  int hit = find_method_index(methods, name, signature, skipping_overpass);
+    Array<Method*>* methods, Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode, StaticLookupMode static_mode) {
+  int hit = find_method_index(methods, name, signature, overpass_mode, static_mode);
   return hit >= 0 ? methods->at(hit): NULL;
 }
 
@@ -1454,13 +1454,19 @@
 // is important during method resolution to prefer a static method, for example,
 // over an overpass method.
 int InstanceKlass::find_method_index(
-    Array<Method*>* methods, Symbol* name, Symbol* signature, bool skipping_overpass) {
+    Array<Method*>* methods, Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode, StaticLookupMode static_mode) {
+  bool skipping_overpass = (overpass_mode == skip_overpass);
+  bool skipping_static = (static_mode == skip_static);
   int hit = binary_search(methods, name);
   if (hit != -1) {
     Method* m = methods->at(hit);
     // Do linear search to find matching signature.  First, quick check
     // for common case, ignoring overpasses if requested.
-    if ((m->signature() == signature) && (!skipping_overpass || !m->is_overpass())) return hit;
+    if ((m->signature() == signature) &&
+        (!skipping_overpass || !m->is_overpass()) &&
+        (!skipping_static || !m->is_static())) {
+      return hit;
+    }
 
     // search downwards through overloaded methods
     int i;
@@ -1468,18 +1474,26 @@
         Method* m = methods->at(i);
         assert(m->is_method(), "must be method");
         if (m->name() != name) break;
-        if ((m->signature() == signature) && (!skipping_overpass || !m->is_overpass())) return i;
+        if ((m->signature() == signature) &&
+            (!skipping_overpass || !m->is_overpass()) &&
+            (!skipping_static || !m->is_static())) {
+          return i;
+        }
     }
     // search upwards
     for (i = hit + 1; i < methods->length(); ++i) {
         Method* m = methods->at(i);
         assert(m->is_method(), "must be method");
         if (m->name() != name) break;
-        if ((m->signature() == signature) && (!skipping_overpass || !m->is_overpass())) return i;
+        if ((m->signature() == signature) &&
+            (!skipping_overpass || !m->is_overpass()) &&
+            (!skipping_static || !m->is_static())) {
+          return i;
+        }
     }
     // not found
 #ifdef ASSERT
-    int index = skipping_overpass ? -1 : linear_search(methods, name, signature);
+    int index = (skipping_overpass || skipping_static) ? -1 : linear_search(methods, name, signature);
     assert(index == -1, err_msg("binary search should have found entry %d", index));
 #endif
   }
@@ -1505,16 +1519,16 @@
 
 // uncached_lookup_method searches both the local class methods array and all
 // superclasses methods arrays, skipping any overpass methods in superclasses.
-Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const {
-  MethodLookupMode lookup_mode = mode;
+Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode) const {
+  OverpassLookupMode overpass_local_mode = overpass_mode;
   Klass* klass = const_cast<InstanceKlass*>(this);
   while (klass != NULL) {
-    Method* method = InstanceKlass::cast(klass)->find_method_impl(name, signature, (lookup_mode == skip_overpass));
+    Method* method = InstanceKlass::cast(klass)->find_method_impl(name, signature, overpass_local_mode, find_static);
     if (method != NULL) {
       return method;
     }
     klass = InstanceKlass::cast(klass)->super();
-    lookup_mode = skip_overpass;   // Always ignore overpass methods in superclasses
+    overpass_local_mode = skip_overpass;   // Always ignore overpass methods in superclasses
   }
   return NULL;
 }
@@ -1544,7 +1558,7 @@
   }
   // Look up interfaces
   if (m == NULL) {
-    m = lookup_method_in_all_interfaces(name, signature, normal);
+    m = lookup_method_in_all_interfaces(name, signature, find_defaults);
   }
   return m;
 }
@@ -1554,7 +1568,7 @@
 // They should only be found in the initial InterfaceMethodRef
 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name,
                                                        Symbol* signature,
-                                                       MethodLookupMode mode) const {
+                                                       DefaultsLookupMode defaults_mode) const {
   Array<Klass*>* all_ifs = transitive_interfaces();
   int num_ifs = all_ifs->length();
   InstanceKlass *ik = NULL;
@@ -1562,7 +1576,7 @@
     ik = InstanceKlass::cast(all_ifs->at(i));
     Method* m = ik->lookup_method(name, signature);
     if (m != NULL && m->is_public() && !m->is_static() &&
-        ((mode != skip_defaults) || !m->is_default_method())) {
+        ((defaults_mode != skip_defaults) || !m->is_default_method())) {
       return m;
     }
   }
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/oops/instanceKlass.hpp
--- a/hotspot/src/share/vm/oops/instanceKlass.hpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/oops/instanceKlass.hpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -493,14 +493,15 @@
   static Method* find_instance_method(Array<Method*>* methods, Symbol* name, Symbol* signature);
 
   // find a local method index in default_methods (returns -1 if not found)
-  static int find_method_index(Array<Method*>* methods, Symbol* name, Symbol* signature, bool skipping_overpass);
+  static int find_method_index(Array<Method*>* methods, Symbol* name, Symbol* signature,
+                               OverpassLookupMode overpass_mode, StaticLookupMode static_mode);
 
   // lookup operation (returns NULL if not found)
-  Method* uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const;
+  Method* uncached_lookup_method(Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode) const;
 
   // lookup a method in all the interfaces that this class implements
   // (returns NULL if not found)
-  Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature, MethodLookupMode mode) const;
+  Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature, DefaultsLookupMode defaults_mode) const;
 
   // lookup a method in local defaults then in all interfaces
   // (returns NULL if not found)
@@ -1052,8 +1053,10 @@
   Klass* array_klass_impl(bool or_null, TRAPS);
 
   // find a local method (returns NULL if not found)
-  Method* find_method_impl(Symbol* name, Symbol* signature, bool skipping_overpass) const;
-  static Method* find_method_impl(Array<Method*>* methods, Symbol* name, Symbol* signature, bool skipping_overpass);
+  Method* find_method_impl(Symbol* name, Symbol* signature,
+                           OverpassLookupMode overpass_mode, StaticLookupMode static_mode) const;
+  static Method* find_method_impl(Array<Method*>* methods, Symbol* name, Symbol* signature,
+                                  OverpassLookupMode overpass_mode, StaticLookupMode static_mode);
 
   // Free CHeap allocated fields.
   void release_C_heap_structures();
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/oops/klass.cpp
--- a/hotspot/src/share/vm/oops/klass.cpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/oops/klass.cpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -140,7 +140,7 @@
   return NULL;
 }
 
-Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const {
+Method* Klass::uncached_lookup_method(Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode) const {
 #ifdef ASSERT
   tty->print_cr("Error: uncached_lookup_method called on a klass oop."
                 " Likely error: reflection method does not correctly"
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/oops/klass.hpp
--- a/hotspot/src/share/vm/oops/klass.hpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/oops/klass.hpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -164,7 +164,9 @@
   void* operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw();
 
  public:
-  enum MethodLookupMode { normal, skip_overpass, skip_defaults };
+  enum DefaultsLookupMode { find_defaults, skip_defaults };
+  enum OverpassLookupMode { find_overpass, skip_overpass };
+  enum StaticLookupMode   { find_static,   skip_static };
 
   bool is_klass() const volatile { return true; }
 
@@ -413,10 +415,10 @@
   // lookup operation for MethodLookupCache
   friend class MethodLookupCache;
   virtual Klass* find_field(Symbol* name, Symbol* signature, fieldDescriptor* fd) const;
-  virtual Method* uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const;
+  virtual Method* uncached_lookup_method(Symbol* name, Symbol* signature, OverpassLookupMode overpass_mode) const;
  public:
   Method* lookup_method(Symbol* name, Symbol* signature) const {
-    return uncached_lookup_method(name, signature, normal);
+    return uncached_lookup_method(name, signature, find_overpass);
   }
 
   // array class with specific rank
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/oops/klassVtable.cpp
--- a/hotspot/src/share/vm/oops/klassVtable.cpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/oops/klassVtable.cpp	Fri Jan 23 09:54:33 2015 -0500
@@ -649,7 +649,7 @@
   // this check for all access permissions.
   InstanceKlass *sk = InstanceKlass::cast(super);
   if (sk->has_miranda_methods()) {
-    if (sk->lookup_method_in_all_interfaces(name, signature, Klass::normal) != NULL) {
+    if (sk->lookup_method_in_all_interfaces(name, signature, Klass::find_defaults) != NULL) {
       return false;  // found a matching miranda; we do not need a new entry
     }
   }
@@ -725,7 +725,7 @@
              && mo->method_holder() != NULL
              && mo->method_holder()->super() != NULL)
       {
-         mo = mo->method_holder()->super()->uncached_lookup_method(name, signature, Klass::normal);
+         mo = mo->method_holder()->super()->uncached_lookup_method(name, signature, Klass::find_overpass);
       }
       if (mo == NULL || mo->access_flags().is_private() ) {
         // super class hierarchy does not implement it or protection is different
@@ -770,7 +770,7 @@
       if (is_miranda(im, class_methods, default_methods, super)) { // is it a miranda at all?
         InstanceKlass *sk = InstanceKlass::cast(super);
         // check if it is a duplicate of a super's miranda
-        if (sk->lookup_method_in_all_interfaces(im->name(), im->signature(), Klass::normal) == NULL) {
+        if (sk->lookup_method_in_all_interfaces(im->name(), im->signature(), Klass::find_defaults) == NULL) {
           new_mirandas->append(im);
         }
         if (all_mirandas != NULL) {
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/prims/jvm.cpp
--- a/hotspot/src/share/vm/prims/jvm.cpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/prims/jvm.cpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1167,7 +1167,7 @@
   Method* m_oop = object->klass()->uncached_lookup_method(
                                            vmSymbols::run_method_name(),
                                            vmSymbols::void_object_signature(),
-                                           Klass::normal);
+                                           Klass::find_overpass);
   methodHandle m (THREAD, m_oop);
   if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
diff -r 544fb99e0080 -r f7339cba0a6a hotspot/src/share/vm/prims/nativeLookup.cpp
--- a/hotspot/src/share/vm/prims/nativeLookup.cpp	Tue Jan 20 13:56:57 2015 +0100
+++ b/hotspot/src/share/vm/prims/nativeLookup.cpp	Fri Jan 23 09:54:33 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -393,7 +393,7 @@
 
   // Find method and invoke standard lookup
   methodHandle method (THREAD,
-                       klass->uncached_lookup_method(m_name, s_name, Klass::normal));
+                       klass->uncached_lookup_method(m_name, s_name, Klass::find_overpass));
   address result = lookup(method, in_base_library, CATCH);
   assert(in_base_library, "must be in basic library");
   guarantee(result != NULL, "must be non NULL");