src/hotspot/share/oops/arrayKlass.cpp

@@ -22,18 +22,20 @@
  *
  */
 
 #include "precompiled.hpp"
 #include "classfile/javaClasses.hpp"
+#include "classfile/symbolTable.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "gc/shared/collectedHeap.inline.hpp"
 #include "jvmtifiles/jvmti.h"
 #include "memory/metaspaceClosure.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
 #include "oops/arrayKlass.hpp"
+#include "oops/objArrayKlass.hpp"
 #include "oops/arrayOop.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/objArrayOop.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/handles.inline.hpp"

@@ -94,10 +96,51 @@
     set_layout_helper(Klass::_lh_neutral_value);
     set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5)
     JFR_ONLY(INIT_ID(this);)
 }
 
+Symbol* ArrayKlass::create_element_klass_array_name(Klass* element_klass, TRAPS) {
+  Symbol* name = NULL;
+  if (!element_klass->is_instance_klass() ||
+      (name = InstanceKlass::cast(element_klass)->array_name()) == NULL) {
+
+    ResourceMark rm(THREAD);
+    char *name_str = element_klass->name()->as_C_string();
+    int len = element_klass->name()->utf8_length();
+    char *new_str = NEW_RESOURCE_ARRAY(char, len + 4);
+    int idx = 0;
+    new_str[idx++] = '[';
+    if (element_klass->is_instance_klass()) { // it could be an array or simple type
+      // Temporary hack, for arrays of value types, this code should be removed
+      // once value types have their own array types
+      // With Q-descriptors, the code below needs to be reworked.
+      // It is still correct today because the only kind of value array supported
+      // is array of null-free values which map to the Q-signature.
+      // As soon as both arrays of null-free values and arrays of nullable values
+      // are supported, this code has to be rewritten to consider the kind of the
+      // array instead of the kind of the elements.
+      if (element_klass->is_value()) {
+        new_str[idx++] = 'Q';
+      } else {
+        new_str[idx++] = 'L';
+      }
+    }
+    memcpy(&new_str[idx], name_str, len * sizeof(char));
+    idx += len;
+    if (element_klass->is_instance_klass()) {
+      new_str[idx++] = ';';
+    }
+    new_str[idx++] = '\0';
+    name = SymbolTable::new_permanent_symbol(new_str, CHECK_NULL);
+    if (element_klass->is_instance_klass() || element_klass->is_value()) {
+      InstanceKlass* ik = InstanceKlass::cast(element_klass);
+      ik->set_array_name(name);
+    }
+  }
+
+  return name;
+}
 
 // Initialization of vtables and mirror object is done separatly from base_create_array_klass,
 // since a GC can happen. At this point all instance variables of the ArrayKlass must be setup.
 void ArrayKlass::complete_create_array_klass(ArrayKlass* k, Klass* super_klass, ModuleEntry* module_entry, TRAPS) {
   k->initialize_supers(super_klass, NULL, CHECK);