Merge

hotspot/make/bsd/makefiles/wb.make

@@ -36,7 +36,7 @@ WB_JAVA_CLASSES  = $(patsubst $(WBSRCDIR)/%,$(WB_JAVA_CLASSDIR)/%, \
 	$(patsubst %.java,%.class,$(WB_JAVA_SRCS)))
 
 $(WB_JAVA_CLASSDIR)/%.class: $(WBSRCDIR)/%.java $(WB_JAVA_CLASSDIR)
-	$(REMOTE) $(COMPILE.JAVAC) -nowarn -d $(WB_JAVA_CLASSDIR) $<
+	$(REMOTE) $(COMPILE.JAVAC) -sourcepath $(WBSRCDIR) -nowarn -d $(WB_JAVA_CLASSDIR) $<
 
 $(WB_JAR): $(WB_JAVA_CLASSES)
 	$(QUIETLY) $(REMOTE) $(RUN.JAR) cf $@ -C $(WB_JAVA_CLASSDIR)/ .

hotspot/make/linux/makefiles/wb.make

@@ -36,7 +36,7 @@ WB_JAVA_CLASSES  = $(patsubst $(WBSRCDIR)/%,$(WB_JAVA_CLASSDIR)/%, \
 	$(patsubst %.java,%.class,$(WB_JAVA_SRCS)))
 
 $(WB_JAVA_CLASSDIR)/%.class: $(WBSRCDIR)/%.java $(WB_JAVA_CLASSDIR)
-	$(REMOTE) $(COMPILE.JAVAC) -nowarn -d $(WB_JAVA_CLASSDIR) $<
+	$(REMOTE) $(COMPILE.JAVAC) -sourcepath $(WBSRCDIR) -nowarn -d $(WB_JAVA_CLASSDIR) $<
 
 $(WB_JAR): $(WB_JAVA_CLASSES)
 	$(QUIETLY) $(REMOTE) $(RUN.JAR) cf $@ -C $(WB_JAVA_CLASSDIR)/ .

hotspot/make/solaris/makefiles/wb.make

@@ -36,7 +36,7 @@ WB_JAVA_CLASSES  = $(patsubst $(WBSRCDIR)/%,$(WB_JAVA_CLASSDIR)/%, \
 	$(patsubst %.java,%.class,$(WB_JAVA_SRCS)))
 
 $(WB_JAVA_CLASSDIR)/%.class: $(WBSRCDIR)/%.java $(WB_JAVA_CLASSDIR)
-	$(REMOTE) $(COMPILE.JAVAC) -nowarn -d $(WB_JAVA_CLASSDIR) $<
+	$(REMOTE) $(COMPILE.JAVAC) -sourcepath $(WBSRCDIR) -nowarn -d $(WB_JAVA_CLASSDIR) $<
 
 $(WB_JAR): $(WB_JAVA_CLASSES)
 	$(QUIETLY) $(REMOTE) $(RUN.JAR) cf $@ -C $(WB_JAVA_CLASSDIR)/ .

hotspot/make/windows/create_obj_files.sh

@@ -80,6 +80,8 @@ if [ -d "${ALTSRC}/share/vm/jfr" ]; then
   BASE_PATHS="${BASE_PATHS} ${ALTSRC}/share/vm/jfr"
 fi
 
+BASE_PATHS="${BASE_PATHS} ${COMMONSRC}/share/vm/prims/wbtestmethods"
+
 CORE_PATHS="${BASE_PATHS}"
 # shared is already in BASE_PATHS. Should add vm/memory but that one is also in BASE_PATHS.
 if [ -d "${ALTSRC}/share/vm/gc_implementation" ]; then

hotspot/make/windows/makefiles/projectcreator.make

@@ -51,6 +51,7 @@ ProjectCreatorIncludesPRIVATE=\
         -relativeInclude src\closed\cpu\$(Platform_arch)\vm \
         -relativeInclude src\share\vm \
         -relativeInclude src\share\vm\precompiled \
+        -relativeInclude src\share\vm\prims\wbtestmethods \
         -relativeInclude src\share\vm\prims \
         -relativeInclude src\os\windows\vm \
         -relativeInclude src\os_cpu\windows_$(Platform_arch)\vm \

hotspot/make/windows/makefiles/vm.make

@@ -172,6 +172,7 @@ VM_PATH=$(VM_PATH);$(WorkSpace)/src/share/vm/asm
 VM_PATH=$(VM_PATH);$(WorkSpace)/src/share/vm/memory
 VM_PATH=$(VM_PATH);$(WorkSpace)/src/share/vm/oops
 VM_PATH=$(VM_PATH);$(WorkSpace)/src/share/vm/prims
+VM_PATH=$(VM_PATH);$(WorkSpace)/src/share/vm/prims/wbtestmethods
 VM_PATH=$(VM_PATH);$(WorkSpace)/src/share/vm/runtime
 VM_PATH=$(VM_PATH);$(WorkSpace)/src/share/vm/services
 VM_PATH=$(VM_PATH);$(WorkSpace)/src/share/vm/trace
@@ -269,6 +270,9 @@ bytecodeInterpreterWithChecks.obj: ..\generated\jvmtifiles\bytecodeInterpreterWi
 {$(COMMONSRC)\share\vm\prims}.cpp.obj::
         $(CXX) $(CXX_FLAGS) $(CXX_USE_PCH) /c $<
 
+{$(COMMONSRC)\share\vm\prims\wbtestmethods}.cpp.obj::
+        $(CXX) $(CXX_FLAGS) $(CXX_USE_PCH) /c $<
+
 {$(COMMONSRC)\share\vm\runtime}.cpp.obj::
         $(CXX) $(CXX_FLAGS) $(CXX_USE_PCH) /c $<
 
@@ -349,6 +353,9 @@ bytecodeInterpreterWithChecks.obj: ..\generated\jvmtifiles\bytecodeInterpreterWi
 {$(ALTSRC)\share\vm\prims}.cpp.obj::
         $(CXX) $(CXX_FLAGS) $(CXX_USE_PCH) /c $<
 
+{$(ALTSRC)\share\vm\prims\wbtestmethods}.cpp.obj::
+        $(CXX) $(CXX_FLAGS) $(CXX_USE_PCH) /c $<
+
 {$(ALTSRC)\share\vm\runtime}.cpp.obj::
         $(CXX) $(CXX_FLAGS) $(CXX_USE_PCH) /c $<
 

hotspot/make/windows/makefiles/wb.make

@@ -40,7 +40,7 @@ wb_java_srcs: $(WorkSpace)\src\share\tools\whitebox\sun\hotspot\*.java $(WB_CLAS
 
 
 {$(WorkSpace)\src\share\tools\whitebox\sun\hotspot}.java.class::
-	$(COMPILE_JAVAC) -d $(WB_CLASSES) $<
+	$(COMPILE_JAVAC) -sourcepath $(WBSRCDIR) -d $(WB_CLASSES) $<
 
 $(WB_JAR): wb_java_srcs
 	$(RUN_JAR) cf $@ -C $(WB_CLASSES) .

hotspot/src/share/tools/whitebox/sun/hotspot/WhiteBox.java

@@ -24,6 +24,7 @@
 
 package sun.hotspot;
 import java.security.BasicPermission;
+import sun.hotspot.parser.DiagnosticCommand;
 
 public class WhiteBox {
 
@@ -67,4 +68,5 @@ public class WhiteBox {
   public native boolean g1IsHumongous(Object o);
   public native long    g1NumFreeRegions();
   public native int     g1RegionSize();
+  public native Object[]    parseCommandLine(String commandline, DiagnosticCommand[] args);
 }

hotspot/src/share/tools/whitebox/sun/hotspot/parser/DiagnosticCommand.java

@@ -0,0 +1,43 @@
+package sun.hotspot.parser;
+
+public class DiagnosticCommand {
+
+    public enum DiagnosticArgumentType {
+        JLONG, BOOLEAN, STRING, NANOTIME, STRINGARRAY, MEMORYSIZE
+    }
+
+    private String name;
+    private String desc;
+    private DiagnosticArgumentType type;
+    private boolean mandatory;
+    private String defaultValue;
+
+    public DiagnosticCommand(String name, String desc, DiagnosticArgumentType type,
+            boolean mandatory, String defaultValue) {
+        this.name = name;
+        this.desc = desc;
+        this.type = type;
+        this.mandatory = mandatory;
+        this.defaultValue = defaultValue;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getDesc() {
+        return desc;
+    }
+
+    public DiagnosticArgumentType getType() {
+        return type;
+    }
+
+    public boolean isMandatory() {
+        return mandatory;
+    }
+
+    public String getDefaultValue() {
+        return defaultValue;
+    }
+}

hotspot/src/share/vm/classfile/classFileParser.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, 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
@@ -81,7 +81,7 @@
 #define JAVA_7_VERSION                    51
 
 
-void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) {
+void ClassFileParser::parse_constant_pool_entries(Handle class_loader, constantPoolHandle cp, int length, TRAPS) {
   // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
   // this function (_current can be allocated in a register, with scalar
   // replacement of aggregates). The _current pointer is copied back to
@@ -272,7 +272,7 @@ void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int len
             indices[names_count] = index;
             hashValues[names_count++] = hash;
             if (names_count == SymbolTable::symbol_alloc_batch_size) {
-              SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
+              SymbolTable::new_symbols(class_loader, cp, names_count, names, lengths, indices, hashValues, CHECK);
               names_count = 0;
             }
           } else {
@@ -289,7 +289,7 @@ void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int len
 
   // Allocate the remaining symbols
   if (names_count > 0) {
-    SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
+    SymbolTable::new_symbols(class_loader, cp, names_count, names, lengths, indices, hashValues, CHECK);
   }
 
   // Copy _current pointer of local copy back to stream().
@@ -318,7 +318,7 @@ class ConstantPoolCleaner : public StackObj {
 
 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
 
-constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
+constantPoolHandle ClassFileParser::parse_constant_pool(Handle class_loader, TRAPS) {
   ClassFileStream* cfs = stream();
   constantPoolHandle nullHandle;
 
@@ -337,7 +337,7 @@ constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
   ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up.
 
   // parsing constant pool entries
-  parse_constant_pool_entries(cp, length, CHECK_(nullHandle));
+  parse_constant_pool_entries(class_loader, cp, length, CHECK_(nullHandle));
 
   int index = 1;  // declared outside of loops for portability
 
@@ -2758,7 +2758,7 @@ instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
   _relax_verify = Verifier::relax_verify_for(class_loader());
 
   // Constant pool
-  constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
+  constantPoolHandle cp = parse_constant_pool(class_loader, CHECK_(nullHandle));
   ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up.
 
   int cp_size = cp->length();

hotspot/src/share/vm/classfile/classFileParser.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, 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
@@ -68,9 +68,10 @@ class ClassFileParser VALUE_OBJ_CLASS_SPEC {
   void set_stream(ClassFileStream* st)             { _stream = st; }
 
   // Constant pool parsing
-  void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS);
+  void parse_constant_pool_entries(Handle class_loader,
+                                   constantPoolHandle cp, int length, TRAPS);
 
-  constantPoolHandle parse_constant_pool(TRAPS);
+  constantPoolHandle parse_constant_pool(Handle class_loader, TRAPS);
 
   // Interface parsing
   objArrayHandle parse_interfaces(constantPoolHandle cp,

hotspot/src/share/vm/classfile/symbolTable.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, 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
@@ -27,6 +27,7 @@
 #include "classfile/symbolTable.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "gc_interface/collectedHeap.inline.hpp"
+#include "memory/allocation.inline.hpp"
 #include "memory/filemap.hpp"
 #include "memory/gcLocker.inline.hpp"
 #include "oops/oop.inline.hpp"
@@ -37,34 +38,35 @@
 // --------------------------------------------------------------------------
 
 SymbolTable* SymbolTable::_the_table = NULL;
+// Static arena for symbols that are not deallocated
+Arena* SymbolTable::_arena = NULL;
 
-Symbol* SymbolTable::allocate_symbol(const u1* name, int len, TRAPS) {
+Symbol* SymbolTable::allocate_symbol(const u1* name, int len, bool c_heap, TRAPS) {
   // Don't allow symbols to be created which cannot fit in a Symbol*.
   if (len > Symbol::max_length()) {
     THROW_MSG_0(vmSymbols::java_lang_InternalError(),
                 "name is too long to represent");
   }
-  Symbol* sym = new (len) Symbol(name, len);
+  Symbol* sym;
+  // Allocate symbols in the C heap when dumping shared spaces in case there
+  // are temporary symbols we can remove.
+  if (c_heap || DumpSharedSpaces) {
+    // refcount starts as 1
+    sym = new (len, THREAD) Symbol(name, len, 1);
+  } else {
+    sym = new (len, arena(), THREAD) Symbol(name, len, -1);
+  }
   assert(sym != NULL, "new should call vm_exit_out_of_memory if C_HEAP is exhausted");
   return sym;
 }
 
-bool SymbolTable::allocate_symbols(int names_count, const u1** names,
+void SymbolTable::initialize_symbols(int arena_alloc_size) {
-                                   int* lengths, Symbol** syms, TRAPS) {
+  // Initialize the arena for global symbols, size passed in depends on CDS.
-  for (int i = 0; i< names_count; i++) {
+  if (arena_alloc_size == 0) {
-    if (lengths[i] > Symbol::max_length()) {
+    _arena = new Arena();
-      THROW_MSG_0(vmSymbols::java_lang_InternalError(),
+  } else {
-                  "name is too long to represent");
+    _arena = new Arena(arena_alloc_size);
-    }
   }
-
-  for (int i = 0; i< names_count; i++) {
-    int len = lengths[i];
-    syms[i] = new (len) Symbol(names[i], len);
-    assert(syms[i] != NULL, "new should call vm_exit_out_of_memory if "
-                            "C_HEAP is exhausted");
-  }
-  return true;
 }
 
 // Call function for all symbols in the symbol table.
@@ -83,8 +85,7 @@ int SymbolTable::symbols_removed = 0;
 int SymbolTable::symbols_counted = 0;
 
 // Remove unreferenced symbols from the symbol table
-// This is done late during GC.  This doesn't use the hash table unlink because
+// This is done late during GC.
-// it assumes that the literals are oops.
 void SymbolTable::unlink() {
   int removed = 0;
   int total = 0;
@@ -156,7 +157,7 @@ Symbol* SymbolTable::lookup(const char* name, int len, TRAPS) {
   if (s != NULL) return s;
 
   // Otherwise, add to symbol to table
-  return the_table()->basic_add(index, (u1*)name, len, hashValue, CHECK_NULL);
+  return the_table()->basic_add(index, (u1*)name, len, hashValue, true, CHECK_NULL);
 }
 
 Symbol* SymbolTable::lookup(const Symbol* sym, int begin, int end, TRAPS) {
@@ -192,7 +193,7 @@ Symbol* SymbolTable::lookup(const Symbol* sym, int begin, int end, TRAPS) {
   // We can't include the code in No_Safepoint_Verifier because of the
   // ResourceMark.
 
-  return the_table()->basic_add(index, (u1*)buffer, len, hashValue, CHECK_NULL);
+  return the_table()->basic_add(index, (u1*)buffer, len, hashValue, true, CHECK_NULL);
 }
 
 Symbol* SymbolTable::lookup_only(const char* name, int len,
@@ -256,71 +257,81 @@ Symbol* SymbolTable::lookup_only_unicode(const jchar* name, int utf16_length,
   }
 }
 
-void SymbolTable::add(constantPoolHandle cp, int names_count,
+void SymbolTable::add(Handle class_loader, constantPoolHandle cp,
+                      int names_count,
                       const char** names, int* lengths, int* cp_indices,
                       unsigned int* hashValues, TRAPS) {
   SymbolTable* table = the_table();
-  bool added = table->basic_add(cp, names_count, names, lengths,
+  bool added = table->basic_add(class_loader, cp, names_count, names, lengths,
                                 cp_indices, hashValues, CHECK);
   if (!added) {
     // do it the hard way
     for (int i=0; i<names_count; i++) {
       int index = table->hash_to_index(hashValues[i]);
-      Symbol* sym = table->basic_add(index, (u1*)names[i], lengths[i],
+      bool c_heap = class_loader() != NULL;
-                                       hashValues[i], CHECK);
+      Symbol* sym = table->basic_add(index, (u1*)names[i], lengths[i], hashValues[i], c_heap, CHECK);
       cp->symbol_at_put(cp_indices[i], sym);
     }
   }
 }
 
+Symbol* SymbolTable::new_permanent_symbol(const char* name, TRAPS) {
+  unsigned int hash;
+  Symbol* result = SymbolTable::lookup_only((char*)name, (int)strlen(name), hash);
+  if (result != NULL) {
+    return result;
+  }
+  SymbolTable* table = the_table();
+  int index = table->hash_to_index(hash);
+  return table->basic_add(index, (u1*)name, (int)strlen(name), hash, false, THREAD);
+}
+
 Symbol* SymbolTable::basic_add(int index, u1 *name, int len,
-                                 unsigned int hashValue, TRAPS) {
+                               unsigned int hashValue, bool c_heap, TRAPS) {
   assert(!Universe::heap()->is_in_reserved(name) || GC_locker::is_active(),
          "proposed name of symbol must be stable");
 
-  // We assume that lookup() has been called already, that it failed,
+  // Grab SymbolTable_lock first.
-  // and symbol was not found.  We create the symbol here.
-  Symbol* sym = allocate_symbol(name, len, CHECK_NULL);
-
-  // Allocation must be done before grabbing the SymbolTable_lock lock
   MutexLocker ml(SymbolTable_lock, THREAD);
 
-  assert(sym->equals((char*)name, len), "symbol must be properly initialized");
-
   // Since look-up was done lock-free, we need to check if another
   // thread beat us in the race to insert the symbol.
-
   Symbol* test = lookup(index, (char*)name, len, hashValue);
   if (test != NULL) {
-    // A race occurred and another thread introduced the symbol, this one
+    // A race occurred and another thread introduced the symbol.
-    // will be dropped and collected.
-    delete sym;
     assert(test->refcount() != 0, "lookup should have incremented the count");
     return test;
   }
 
+  // Create a new symbol.
+  Symbol* sym = allocate_symbol(name, len, c_heap, CHECK_NULL);
+  assert(sym->equals((char*)name, len), "symbol must be properly initialized");
+
   HashtableEntry<Symbol*>* entry = new_entry(hashValue, sym);
-  sym->increment_refcount();
   add_entry(index, entry);
   return sym;
 }
 
-bool SymbolTable::basic_add(constantPoolHandle cp, int names_count,
+// This version of basic_add adds symbols in batch from the constant pool
+// parsing.
+bool SymbolTable::basic_add(Handle class_loader, constantPoolHandle cp,
+                            int names_count,
                             const char** names, int* lengths,
                             int* cp_indices, unsigned int* hashValues,
                             TRAPS) {
-  Symbol* syms[symbol_alloc_batch_size];
+
-  bool allocated = allocate_symbols(names_count, (const u1**)names, lengths,
+  // Check symbol names are not too long.  If any are too long, don't add any.
-                                    syms, CHECK_false);
+  for (int i = 0; i< names_count; i++) {
-  if (!allocated) {
+    if (lengths[i] > Symbol::max_length()) {
-    return false;
+      THROW_MSG_0(vmSymbols::java_lang_InternalError(),
+                  "name is too long to represent");
+    }
   }
 
-  // Allocation must be done before grabbing the SymbolTable_lock lock
+  // Hold SymbolTable_lock through the symbol creation
   MutexLocker ml(SymbolTable_lock, THREAD);
 
   for (int i=0; i<names_count; i++) {
-    assert(syms[i]->equals(names[i], lengths[i]), "symbol must be properly initialized");
     // Since look-up was done lock-free, we need to check if another
     // thread beat us in the race to insert the symbol.
     int index = hash_to_index(hashValues[i]);
@@ -330,16 +341,17 @@ bool SymbolTable::basic_add(constantPoolHandle cp, int names_count,
       // will be dropped and collected. Use test instead.
       cp->symbol_at_put(cp_indices[i], test);
       assert(test->refcount() != 0, "lookup should have incremented the count");
-      delete syms[i];
     } else {
-      Symbol* sym = syms[i];
+      // Create a new symbol.  The null class loader is never unloaded so these
+      // are allocated specially in a permanent arena.
+      bool c_heap = class_loader() != NULL;
+      Symbol* sym = allocate_symbol((const u1*)names[i], lengths[i], c_heap, CHECK_(false));
+      assert(sym->equals(names[i], lengths[i]), "symbol must be properly initialized");  // why wouldn't it be???
       HashtableEntry<Symbol*>* entry = new_entry(hashValues[i], sym);
-      sym->increment_refcount();  // increment refcount in external hashtable
       add_entry(index, entry);
       cp->symbol_at_put(cp_indices[i], sym);
     }
   }
-
   return true;
 }
 
@@ -406,6 +418,8 @@ void SymbolTable::print_histogram() {
           ((float)symbols_removed/(float)symbols_counted)* 100);
   }
   tty->print_cr("Reference counts         %5d", Symbol::_total_count);
+  tty->print_cr("Symbol arena size        %5d used %5d",
+                 arena()->size_in_bytes(), arena()->used());
   tty->print_cr("Histogram of symbol length:");
   tty->print_cr("%8s %5d", "Total  ", total);
   tty->print_cr("%8s %5d", "Maximum", max_symbols);

hotspot/src/share/vm/classfile/symbolTable.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, 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
@@ -82,24 +82,24 @@ private:
   static int symbols_removed;
   static int symbols_counted;
 
-  Symbol* allocate_symbol(const u1* name, int len, TRAPS);   // Assumes no characters larger than 0x7F
+  Symbol* allocate_symbol(const u1* name, int len, bool c_heap, TRAPS); // Assumes no characters larger than 0x7F
-  bool allocate_symbols(int names_count, const u1** names, int* lengths, Symbol** syms, TRAPS);
 
   // Adding elements
-  Symbol* basic_add(int index, u1* name, int len,
+  Symbol* basic_add(int index, u1* name, int len, unsigned int hashValue,
-                      unsigned int hashValue, TRAPS);
+                    bool c_heap, TRAPS);
-  bool basic_add(constantPoolHandle cp, int names_count,
+
+  bool basic_add(Handle class_loader, constantPoolHandle cp, int names_count,
                  const char** names, int* lengths, int* cp_indices,
                  unsigned int* hashValues, TRAPS);
 
-  static void new_symbols(constantPoolHandle cp, int names_count,
+  static void new_symbols(Handle class_loader, constantPoolHandle cp,
+                          int names_count,
                           const char** name, int* lengths,
                           int* cp_indices, unsigned int* hashValues,
                           TRAPS) {
-    add(cp, names_count, name, lengths, cp_indices, hashValues, THREAD);
+    add(class_loader, cp, names_count, name, lengths, cp_indices, hashValues, THREAD);
   }
 
-
   // Table size
   enum {
     symbol_table_size = 20011
@@ -114,10 +114,16 @@ private:
     : Hashtable<Symbol*>(symbol_table_size, sizeof (HashtableEntry<Symbol*>), t,
                 number_of_entries) {}
 
+  // Arena for permanent symbols (null class loader) that are never unloaded
+  static Arena*  _arena;
+  static Arena* arena() { return _arena; }  // called for statistics
 
+  static void initialize_symbols(int arena_alloc_size = 0);
 public:
   enum {
-    symbol_alloc_batch_size = 8
+    symbol_alloc_batch_size = 8,
+    // Pick initial size based on java -version size measurements
+    symbol_alloc_arena_size = 360*K
   };
 
   // The symbol table
@@ -126,6 +132,7 @@ public:
   static void create_table() {
     assert(_the_table == NULL, "One symbol table allowed.");
     _the_table = new SymbolTable();
+    initialize_symbols(symbol_alloc_arena_size);
   }
 
   static void create_table(HashtableBucket* t, int length,
@@ -134,6 +141,9 @@ public:
     assert(length == symbol_table_size * sizeof(HashtableBucket),
            "bad shared symbol size.");
     _the_table = new SymbolTable(t, number_of_entries);
+    // if CDS give symbol table a default arena size since most symbols
+    // are already allocated in the shared misc section.
+    initialize_symbols();
   }
 
   static Symbol* lookup(const char* name, int len, TRAPS);
@@ -151,7 +161,7 @@ public:
   static Symbol* lookup_unicode(const jchar* name, int len, TRAPS);
   static Symbol* lookup_only_unicode(const jchar* name, int len, unsigned int& hash);
 
-  static void add(constantPoolHandle cp, int names_count,
+  static void add(Handle class_loader, constantPoolHandle cp, int names_count,
                   const char** names, int* lengths, int* cp_indices,
                   unsigned int* hashValues, TRAPS);
 
@@ -174,6 +184,9 @@ public:
     return lookup(sym, begin, end, THREAD);
   }
 
+  // Create a symbol in the arena for symbols that are not deleted
+  static Symbol* new_permanent_symbol(const char* name, TRAPS);
+
   // Symbol lookup
   static Symbol* lookup(int index, const char* name, int len, TRAPS);
 

hotspot/src/share/vm/classfile/vmSymbols.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, 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
@@ -79,7 +79,7 @@ void vmSymbols::initialize(TRAPS) {
   if (!UseSharedSpaces) {
     const char* string = &vm_symbol_bodies[0];
     for (int index = (int)FIRST_SID; index < (int)SID_LIMIT; index++) {
-      Symbol* sym = SymbolTable::new_symbol(string, CHECK);
+      Symbol* sym = SymbolTable::new_permanent_symbol(string, CHECK);
       _symbols[index] = sym;
       string += strlen(string); // skip string body
       string += 1;              // skip trailing null
@@ -128,7 +128,7 @@ void vmSymbols::initialize(TRAPS) {
     // Spot-check correspondence between strings, symbols, and enums:
     assert(_symbols[NO_SID] == NULL, "must be");
     const char* str = "java/lang/Object";
-    TempNewSymbol jlo = SymbolTable::new_symbol(str, CHECK);
+    TempNewSymbol jlo = SymbolTable::new_permanent_symbol(str, CHECK);
     assert(strncmp(str, (char*)jlo->base(), jlo->utf8_length()) == 0, "");
     assert(jlo == java_lang_Object(), "");
     SID sid = VM_SYMBOL_ENUM_NAME(java_lang_Object);
@@ -147,7 +147,7 @@ void vmSymbols::initialize(TRAPS) {
     // The string "format" happens (at the moment) not to be a vmSymbol,
     // though it is a method name in java.lang.String.
     str = "format";
-    TempNewSymbol fmt = SymbolTable::new_symbol(str, CHECK);
+    TempNewSymbol fmt = SymbolTable::new_permanent_symbol(str, CHECK);
     sid = find_sid(fmt);
     assert(sid == NO_SID, "symbol index works (negative test)");
   }

hotspot/src/share/vm/memory/dump.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2012, 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
@@ -1490,12 +1490,11 @@ void GenCollectedHeap::preload_and_dump(TRAPS) {
 
     // sun.io.Converters
     static const char obj_array_sig[] = "[[Ljava/lang/Object;";
-    SymbolTable::lookup(obj_array_sig, (int)strlen(obj_array_sig), THREAD);
+    (void)SymbolTable::new_permanent_symbol(obj_array_sig, THREAD);
 
     // java.util.HashMap
     static const char map_entry_array_sig[] = "[Ljava/util/Map$Entry;";
-    SymbolTable::lookup(map_entry_array_sig, (int)strlen(map_entry_array_sig),
+    (void)SymbolTable::new_permanent_symbol(map_entry_array_sig, THREAD);
-                        THREAD);
 
     tty->print("Loading classes to share ... ");
     while ((fgets(class_name, sizeof class_name, file)) != NULL) {
@@ -1514,7 +1513,7 @@ void GenCollectedHeap::preload_and_dump(TRAPS) {
       computed_jsum = jsum(computed_jsum, class_name, (const int)name_len - 1);
 
       // Got a class name - load it.
-      TempNewSymbol class_name_symbol = SymbolTable::new_symbol(class_name, THREAD);
+      Symbol* class_name_symbol = SymbolTable::new_permanent_symbol(class_name, THREAD);
       guarantee(!HAS_PENDING_EXCEPTION, "Exception creating a symbol.");
       klassOop klass = SystemDictionary::resolve_or_null(class_name_symbol,
                                                          THREAD);

hotspot/src/share/vm/oops/objArrayKlassKlass.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, 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
@@ -137,7 +137,7 @@ klassOop objArrayKlassKlass::allocate_objArray_klass_impl(objArrayKlassKlassHand
       new_str[idx++] = ';';
     }
     new_str[idx++] = '\0';
-    name = SymbolTable::new_symbol(new_str, CHECK_0);
+    name = SymbolTable::new_permanent_symbol(new_str, CHECK_0);
     if (element_klass->oop_is_instance()) {
       instanceKlass* ik = instanceKlass::cast(element_klass());
       ik->set_array_name(name);

hotspot/src/share/vm/oops/symbol.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, 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
@@ -29,15 +29,25 @@
 #include "runtime/os.hpp"
 #include "memory/allocation.inline.hpp"
 
-Symbol::Symbol(const u1* name, int length) : _refcount(0), _length(length) {
+Symbol::Symbol(const u1* name, int length, int refcount) : _refcount(refcount), _length(length) {
   _identity_hash = os::random();
   for (int i = 0; i < _length; i++) {
     byte_at_put(i, name[i]);
   }
 }
 
-void* Symbol::operator new(size_t size, int len) {
+void* Symbol::operator new(size_t sz, int len, TRAPS) {
-  return (void *) AllocateHeap(object_size(len) * HeapWordSize, "symbol");
+  int alloc_size = object_size(len)*HeapWordSize;
+  address res = (address) AllocateHeap(alloc_size, "symbol");
+  DEBUG_ONLY(set_allocation_type(res, ResourceObj::C_HEAP);)
+  return res;
+}
+
+void* Symbol::operator new(size_t sz, int len, Arena* arena, TRAPS) {
+  int alloc_size = object_size(len)*HeapWordSize;
+  address res = (address)arena->Amalloc(alloc_size);
+  DEBUG_ONLY(set_allocation_type(res, ResourceObj::ARENA);)
+  return res;
 }
 
 // ------------------------------------------------------------------
@@ -206,26 +216,5 @@ void Symbol::print_value_on(outputStream* st) const {
   }
 }
 
-void Symbol::increment_refcount() {
+// SymbolTable prints this in its statistics
-  // Only increment the refcount if positive.  If negative either
-  // overflow has occurred or it is a permanent symbol in a read only
-  // shared archive.
-  if (_refcount >= 0) {
-    Atomic::inc(&_refcount);
-    NOT_PRODUCT(Atomic::inc(&_total_count);)
-  }
-}
-
-void Symbol::decrement_refcount() {
-  if (_refcount >= 0) {
-    Atomic::dec(&_refcount);
-#ifdef ASSERT
-    if (_refcount < 0) {
-      print();
-      assert(false, "reference count underflow for symbol");
-    }
-#endif
-  }
-}
-
 NOT_PRODUCT(int Symbol::_total_count = 0;)

hotspot/src/share/vm/oops/symbol.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, 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
@@ -27,6 +27,7 @@
 
 #include "utilities/utf8.hpp"
 #include "memory/allocation.hpp"
+#include "runtime/atomic.hpp"
 
 // A Symbol is a canonicalized string.
 // All Symbols reside in global SymbolTable and are reference counted.
@@ -95,7 +96,7 @@
 // TempNewSymbol (passed in as a parameter) so the reference count on its symbol
 // will be decremented when it goes out of scope.
 
-class Symbol : public CHeapObj {
+class Symbol : public ResourceObj {
   friend class VMStructs;
   friend class SymbolTable;
   friend class MoveSymbols;
@@ -111,7 +112,7 @@ class Symbol : public CHeapObj {
   };
 
   static int object_size(int length) {
-    size_t size = heap_word_size(sizeof(Symbol) + length);
+    size_t size = heap_word_size(sizeof(Symbol) + (length > 0 ? length - 1 : 0));
     return align_object_size(size);
   }
 
@@ -120,28 +121,25 @@ class Symbol : public CHeapObj {
     _body[index] = value;
   }
 
-  Symbol(const u1* name, int length);
+  Symbol(const u1* name, int length, int refcount);
-  void* operator new(size_t size, int len);
+  void* operator new(size_t size, int len, TRAPS);
+  void* operator new(size_t size, int len, Arena* arena, TRAPS);
 
  public:
   // Low-level access (used with care, since not GC-safe)
   const jbyte* base() const { return &_body[0]; }
 
-  int object_size() { return object_size(utf8_length()); }
+  int object_size()         { return object_size(utf8_length()); }
 
   // Returns the largest size symbol we can safely hold.
-  static int max_length() {
+  static int max_length()   { return max_symbol_length; }
-    return max_symbol_length;
-  }
 
-  int identity_hash() {
+  int identity_hash()       { return _identity_hash; }
-    return _identity_hash;
-  }
 
   // Reference counting.  See comments above this class for when to use.
-  int refcount() const { return _refcount; }
+  int refcount() const      { return _refcount; }
-  void increment_refcount();
+  inline void increment_refcount();
-  void decrement_refcount();
+  inline void decrement_refcount();
 
   int byte_at(int index) const {
     assert(index >=0 && index < _length, "symbol index overflow");
@@ -220,4 +218,26 @@ int Symbol::fast_compare(Symbol* other) const {
  return (((uintptr_t)this < (uintptr_t)other) ? -1
    : ((uintptr_t)this == (uintptr_t) other) ? 0 : 1);
 }
+
+inline void Symbol::increment_refcount() {
+  // Only increment the refcount if positive.  If negative either
+  // overflow has occurred or it is a permanent symbol in a read only
+  // shared archive.
+  if (_refcount >= 0) {
+    Atomic::inc(&_refcount);
+    NOT_PRODUCT(Atomic::inc(&_total_count);)
+  }
+}
+
+inline void Symbol::decrement_refcount() {
+  if (_refcount >= 0) {
+    Atomic::dec(&_refcount);
+#ifdef ASSERT
+    if (_refcount < 0) {
+      print();
+      assert(false, "reference count underflow for symbol");
+    }
+#endif
+  }
+}
 #endif // SHARE_VM_OOPS_SYMBOL_HPP

hotspot/src/share/vm/oops/typeArrayKlass.cpp

@@ -55,7 +55,7 @@ klassOop typeArrayKlass::create_klass(BasicType type, int scale,
 
   Symbol* sym = NULL;
   if (name_str != NULL) {
-    sym = SymbolTable::new_symbol(name_str, CHECK_NULL);
+    sym = SymbolTable::new_permanent_symbol(name_str, CHECK_NULL);
   }
   KlassHandle klassklass (THREAD, Universe::typeArrayKlassKlassObj());
 

hotspot/src/share/vm/prims/wbtestmethods/parserTests.cpp

@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2011, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+
+#include "classfile/symbolTable.hpp"
+
+#include "prims/jni.h"
+#include "prims/whitebox.hpp"
+#include "prims/wbtestmethods/parserTests.hpp"
+#include "runtime/interfaceSupport.hpp"
+
+#include "memory/oopFactory.hpp"
+
+#include "services/diagnosticArgument.hpp"
+#include "services/diagnosticFramework.hpp"
+
+//There's no way of beforeahnd knowing an upper size
+//Of the length of a string representation of
+//the value of an argument.
+#define VALUE_MAXLEN 256
+
+// DiagnosticFramework test utility methods
+
+/*
+ * The DiagnosticArgumentType class contains an enum that says which type
+ * this argument represents. (JLONG, BOOLEAN etc).
+ * This method Returns a char* representation of that enum value.
+ */
+static const char* lookup_diagnosticArgumentEnum(const char* field_name, oop object) {
+  Thread* THREAD = Thread::current();
+  const char* enum_sig = "Lsun/hotspot/parser/DiagnosticCommand$DiagnosticArgumentType;";
+  TempNewSymbol enumSigSymbol = SymbolTable::lookup(enum_sig, (int) strlen(enum_sig), THREAD);
+  int offset = WhiteBox::offset_for_field(field_name, object, enumSigSymbol);
+  oop enumOop = object->obj_field(offset);
+
+  const char* ret = WhiteBox::lookup_jstring("name", enumOop);
+  return ret;
+}
+
+/*
+ * Takes an oop to a DiagnosticArgumentType-instance and
+ * reads the fields from it. Fills an native DCmdParser with
+ * this info.
+ */
+static void fill_in_parser(DCmdParser* parser, oop argument)
+{
+  const char* name = WhiteBox::lookup_jstring("name", argument);
+  const char* desc = WhiteBox::lookup_jstring("desc", argument);
+  const char* default_value = WhiteBox::lookup_jstring("defaultValue", argument);
+  bool mandatory = WhiteBox::lookup_bool("mandatory", argument);
+  const char*  type = lookup_diagnosticArgumentEnum("type", argument);
+
+   if (strcmp(type, "STRING") == 0) {
+     DCmdArgument<char*>* argument = new DCmdArgument<char*>(
+     name, desc,
+     "STRING", mandatory, default_value);
+     parser->add_dcmd_option(argument);
+   } else if (strcmp(type, "NANOTIME") == 0) {
+     DCmdArgument<NanoTimeArgument>* argument = new DCmdArgument<NanoTimeArgument>(
+     name, desc,
+     "NANOTIME", mandatory, default_value);
+     parser->add_dcmd_option(argument);
+   } else if (strcmp(type, "JLONG") == 0) {
+     DCmdArgument<jlong>* argument = new DCmdArgument<jlong>(
+     name, desc,
+     "JLONG", mandatory, default_value);
+     parser->add_dcmd_option(argument);
+   } else if (strcmp(type, "BOOLEAN") == 0) {
+     DCmdArgument<bool>* argument = new DCmdArgument<bool>(
+     name, desc,
+     "BOOLEAN", mandatory, default_value);
+     parser->add_dcmd_option(argument);
+   } else if (strcmp(type, "MEMORYSIZE") == 0) {
+     DCmdArgument<MemorySizeArgument>* argument = new DCmdArgument<MemorySizeArgument>(
+     name, desc,
+     "MEMORY SIZE", mandatory, default_value);
+     parser->add_dcmd_option(argument);
+   } else if (strcmp(type, "STRINGARRAY") == 0) {
+     DCmdArgument<StringArrayArgument*>* argument = new DCmdArgument<StringArrayArgument*>(
+     name, desc,
+     "STRING SET", mandatory);
+     parser->add_dcmd_option(argument);
+   }
+}
+
+/*
+ * Will Fill in a java object array with alternating names of parsed command line options and
+ * the value that has been parsed for it:
+ * { name, value, name, value ... }
+ * This can then be checked from java.
+ */
+WB_ENTRY(jobjectArray, WB_ParseCommandLine(JNIEnv* env, jobject o, jstring j_cmdline, jobjectArray arguments))
+  ResourceMark rm;
+  DCmdParser parser;
+
+  const char* c_cmdline = java_lang_String::as_utf8_string(JNIHandles::resolve(j_cmdline));
+  objArrayOop argumentArray = objArrayOop(JNIHandles::resolve_non_null(arguments));
+
+  int length = argumentArray->length();
+
+  for (int i = 0; i < length; i++) {
+    oop argument_oop = argumentArray->obj_at(i);
+    fill_in_parser(&parser, argument_oop);
+  }
+
+  CmdLine cmdline(c_cmdline, strlen(c_cmdline), true);
+  parser.parse(&cmdline,',',CHECK_NULL);
+
+  klassOop k = SystemDictionary::Object_klass();
+  objArrayOop returnvalue_array = oopFactory::new_objArray(k, parser.num_arguments() * 2, CHECK_NULL);
+
+  GrowableArray<const char *>*parsedArgNames = parser.argument_name_array();
+
+  for (int i = 0; i < parser.num_arguments(); i++) {
+    oop parsedName = java_lang_String::create_oop_from_str(parsedArgNames->at(i), CHECK_NULL);
+    returnvalue_array->obj_at_put(i*2, parsedName);
+    GenDCmdArgument* arg = parser.lookup_dcmd_option(parsedArgNames->at(i), strlen(parsedArgNames->at(i)));
+    char buf[VALUE_MAXLEN];
+    arg->value_as_str(buf, sizeof(buf));
+    oop parsedValue = java_lang_String::create_oop_from_str(buf, CHECK_NULL);
+    returnvalue_array->obj_at_put(i*2+1, parsedValue);
+  }
+
+  return (jobjectArray) JNIHandles::make_local(returnvalue_array);
+
+WB_END

hotspot/src/share/vm/prims/wbtestmethods/parserTests.hpp

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2012, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef SHARE_VM_PRIMS_WBTESTMETHODS_PARSERTESTS_H
+#define SHARE_VM_PRIMS_WBTESTMETHODS_PARSERTESTS_H
+
+#include "prims/jni.h"
+#include "prims/whitebox.hpp"
+
+WB_METHOD_DECLARE WB_ParseCommandLine(JNIEnv* env, jobject o, jstring args, jobjectArray arguments);
+
+#endif //SHARE_VM_PRIMS_WBTESTMETHODS_PARSERTESTS_H

hotspot/src/share/vm/prims/whitebox.cpp

@@ -24,11 +24,14 @@
 
 #include "precompiled.hpp"
 
-#include "jni.h"
-
 #include "memory/universe.hpp"
 #include "oops/oop.inline.hpp"
+
+#include "classfile/symbolTable.hpp"
+
 #include "prims/whitebox.hpp"
+#include "prims/wbtestmethods/parserTests.hpp"
+
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/os.hpp"
 #include "utilities/debug.hpp"
@@ -41,13 +44,6 @@
 
 bool WhiteBox::_used = false;
 
-// Entry macro to transition from JNI to VM state.
-
-#define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header)
-#define WB_END JNI_END
-
-// Definitions of functions exposed via Whitebox API
-
 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
   return (jlong)(void*)JNIHandles::resolve(obj);
 WB_END
@@ -81,11 +77,63 @@ WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 WB_END
 #endif // !SERIALGC
 
+//Some convenience methods to deal with objects from java
+int WhiteBox::offset_for_field(const char* field_name, oop object,
+    Symbol* signature_symbol) {
+  assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
+  Thread* THREAD = Thread::current();
+
+  //Get the class of our object
+  klassOop arg_klass = object->klass();
+  //Turn it into an instance-klass
+  instanceKlass* ik = instanceKlass::cast(arg_klass);
+
+  //Create symbols to look for in the class
+  TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
+      THREAD);
+
+  //To be filled in with an offset of the field we're looking for
+  fieldDescriptor fd;
+
+  klassOop res = ik->find_field(name_symbol, signature_symbol, &fd);
+  if (res == NULL) {
+    tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
+        name_symbol->as_C_string());
+    fatal("Invalid layout of preloaded class");
+  }
+
+  //fetch the field at the offset we've found
+  int dest_offset = fd.offset();
+
+  return dest_offset;
+}
+
+
+const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
+  int offset = offset_for_field(field_name, object,
+      vmSymbols::string_signature());
+  oop string = object->obj_field(offset);
+  const char* ret = java_lang_String::as_utf8_string(string);
+  return ret;
+}
+
+bool WhiteBox::lookup_bool(const char* field_name, oop object) {
+  int offset =
+      offset_for_field(field_name, object, vmSymbols::bool_signature());
+  bool ret = (object->bool_field(offset) == JNI_TRUE);
+  return ret;
+}
+
+
 #define CC (char*)
 
 static JNINativeMethod methods[] = {
   {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
+  {CC "parseCommandLine",
+      CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
+      (void*) &WB_ParseCommandLine
+  },
 #ifndef SERIALGC
   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
   {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },

hotspot/src/share/vm/prims/whitebox.hpp

@@ -25,12 +25,29 @@
 #ifndef SHARE_VM_PRIMS_WHITEBOX_HPP
 #define SHARE_VM_PRIMS_WHITEBOX_HPP
 
+#include "prims/jni.h"
+
+#include "memory/allocation.hpp"
+#include "oops/oopsHierarchy.hpp"
+
+// Entry macro to transition from JNI to VM state.
+
+#define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header)
+#define WB_END JNI_END
+#define WB_METHOD_DECLARE extern "C" jobjectArray JNICALL
+
 class WhiteBox : public AllStatic {
  private:
   static bool _used;
  public:
   static bool used()     { return _used; }
   static void set_used() { _used = true; }
+  static int offset_for_field(const char* field_name, oop object,
+    Symbol* signature_symbol);
+  static const char* lookup_jstring(const char* field_name, oop object);
+  static bool lookup_bool(const char* field_name, oop object);
 };
 
+
+
 #endif // SHARE_VM_PRIMS_WHITEBOX_HPP

hotspot/src/share/vm/runtime/globals.hpp

@@ -3807,7 +3807,7 @@ class CommandLineFlags {
   product(uintx, SharedReadOnlySize,   10*M,                                \
           "Size of read-only space in permanent generation (in bytes)")     \
                                                                             \
-  product(uintx, SharedMiscDataSize,    NOT_LP64(4*M) LP64_ONLY(5*M),       \
+  product(uintx, SharedMiscDataSize, NOT_LP64(4*M) LP64_ONLY(5*M) NOT_PRODUCT(+1*M),       \
           "Size of the shared data area adjacent to the heap (in bytes)")   \
                                                                             \
   product(uintx, SharedMiscCodeSize,    4*M,                                \

hotspot/src/share/vm/services/diagnosticArgument.cpp

@@ -43,6 +43,47 @@ void GenDCmdArgument::read_value(const char* str, size_t len, TRAPS) {
   set_is_set(true);
 }
 
+void GenDCmdArgument::to_string(jlong l, char* buf, size_t len) {
+  jio_snprintf(buf, len, INT64_FORMAT, l);
+}
+
+void GenDCmdArgument::to_string(bool b, char* buf, size_t len) {
+  jio_snprintf(buf, len, b ? "true" : "false");
+}
+
+void GenDCmdArgument::to_string(NanoTimeArgument n, char* buf, size_t len) {
+  jio_snprintf(buf, len, INT64_FORMAT, n._nanotime);
+}
+
+void GenDCmdArgument::to_string(MemorySizeArgument m, char* buf, size_t len) {
+  jio_snprintf(buf, len, INT64_FORMAT, m._size);
+}
+
+void GenDCmdArgument::to_string(char* c, char* buf, size_t len) {
+  jio_snprintf(buf, len, "%s", c);
+}
+
+void GenDCmdArgument::to_string(StringArrayArgument* f, char* buf, size_t len) {
+  int length = f->array()->length();
+  size_t written = 0;
+  buf[0] = 0;
+  for (int i = 0; i < length; i++) {
+    char* next_str = f->array()->at(i);
+    size_t next_size = strlen(next_str);
+    //Check if there's room left to write next element
+    if (written + next_size > len) {
+      return;
+    }
+    //Actually write element
+    strcat(buf, next_str);
+    written += next_size;
+    //Check if there's room left for the comma
+    if (i < length-1 && len - written > 0) {
+      strcat(buf, ",");
+    }
+  }
+}
+
 template <> void DCmdArgument<jlong>::parse_value(const char* str,
                                                   size_t len, TRAPS) {
     if (str == NULL || sscanf(str, INT64_FORMAT, &_value) != 1) {

hotspot/src/share/vm/services/diagnosticArgument.hpp

@@ -110,12 +110,20 @@ public:
   virtual void init_value(TRAPS) = 0;
   virtual void reset(TRAPS) = 0;
   virtual void cleanup() = 0;
+  virtual void value_as_str(char* buf, size_t len) = 0;
   void set_next(GenDCmdArgument* arg) {
     _next = arg;
   }
   GenDCmdArgument* next() {
     return _next;
   }
+
+  void to_string(jlong l, char* buf, size_t len);
+  void to_string(bool b, char* buf, size_t len);
+  void to_string(char* c, char* buf, size_t len);
+  void to_string(NanoTimeArgument n, char* buf, size_t len);
+  void to_string(MemorySizeArgument f, char* buf, size_t len);
+  void to_string(StringArrayArgument* s, char* buf, size_t len);
 };
 
 template <class ArgType> class DCmdArgument: public GenDCmdArgument {
@@ -143,6 +151,7 @@ public:
   void parse_value(const char* str, size_t len, TRAPS);
   void init_value(TRAPS);
   void destroy_value();
+  void value_as_str(char *buf, size_t len) { return to_string(_value, buf, len);}
 };
 
 #endif  /* SHARE_VM_SERVICES_DIAGNOSTICARGUMENT_HPP */

hotspot/test/serviceability/ParserTest.java

@@ -0,0 +1,152 @@
+/*
+ * @test ParserTest
+ * @summary verify that whitebox functions can be linked and executed
+ * @run compile -J-XX:+UnlockDiagnosticVMOptions -J-XX:+WhiteBoxAPI ParserTest.java
+ * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ParserTest
+ */
+
+import java.math.BigInteger;
+
+import sun.hotspot.parser.DiagnosticCommand;
+import sun.hotspot.parser.DiagnosticCommand.DiagnosticArgumentType;
+import sun.hotspot.WhiteBox;
+
+public class ParserTest {
+    WhiteBox wb;
+
+    public ParserTest() throws Exception {
+        wb = WhiteBox.getWhiteBox();
+
+        testNanoTime();
+        testJLong();
+        testBool();
+        testMemorySize();
+    }
+
+    public static void main(String... args) throws Exception  {
+         new ParserTest();
+    }
+
+    public void testNanoTime() throws Exception {
+        String name = "name";
+        DiagnosticCommand arg = new DiagnosticCommand(name,
+                "desc", DiagnosticArgumentType.NANOTIME,
+                false, "0");
+        DiagnosticCommand[] args = {arg};
+
+        BigInteger bi = new BigInteger("7");
+        //These should work
+        parse(name, bi.toString(), name + "=7ns", args);
+
+        bi = bi.multiply(BigInteger.valueOf(1000));
+        parse(name, bi.toString(), name + "=7us", args);
+
+        bi = bi.multiply(BigInteger.valueOf(1000));
+        parse(name, bi.toString(), name + "=7ms", args);
+
+        bi = bi.multiply(BigInteger.valueOf(1000));
+        parse(name, bi.toString(), name + "=7s", args);
+
+        bi = bi.multiply(BigInteger.valueOf(60));
+        parse(name, bi.toString() , name + "=7m", args);
+
+        bi = bi.multiply(BigInteger.valueOf(60));
+        parse(name, bi.toString() , name + "=7h", args);
+
+        bi = bi.multiply(BigInteger.valueOf(24));
+        parse(name, bi.toString() , name + "=7d", args);
+
+        parse(name, "0", name + "=0", args);
+
+        shouldFail(name + "=7xs", args);
+        shouldFail(name + "=7mms", args);
+        shouldFail(name + "=7f", args);
+        //Currently, only value 0 is allowed without unit
+        shouldFail(name + "=7", args);
+    }
+
+    public void testJLong() throws Exception {
+        String name = "name";
+        DiagnosticCommand arg = new DiagnosticCommand(name,
+                "desc", DiagnosticArgumentType.JLONG,
+                false, "0");
+        DiagnosticCommand[] args = {arg};
+
+        wb.parseCommandLine(name + "=10", args);
+        parse(name, "10", name + "=10", args);
+        parse(name, "-5", name + "=-5", args);
+
+        //shouldFail(name + "=12m", args); <-- should fail, doesn't
+    }
+
+    public void testBool() throws Exception {
+        String name = "name";
+        DiagnosticCommand arg = new DiagnosticCommand(name,
+                "desc", DiagnosticArgumentType.BOOLEAN,
+                false, "false");
+        DiagnosticCommand[] args = {arg};
+
+        parse(name, "true", name + "=true", args);
+        parse(name, "false", name + "=false", args);
+        parse(name, "true", name, args);
+
+        //Empty commandline to parse, tests default value
+        //of the parameter "name"
+        parse(name, "false", "", args);
+    }
+
+    public void testMemorySize() throws Exception {
+        String name = "name";
+        String defaultValue = "1024";
+        DiagnosticCommand arg = new DiagnosticCommand(name,
+                "desc", DiagnosticArgumentType.MEMORYSIZE,
+                false, defaultValue);
+        DiagnosticCommand[] args = {arg};
+
+        BigInteger bi = new BigInteger("7");
+        parse(name, bi.toString(), name + "=7b", args);
+
+        bi = bi.multiply(BigInteger.valueOf(1024));
+        parse(name, bi.toString(), name + "=7k", args);
+
+        bi = bi.multiply(BigInteger.valueOf(1024));
+        parse(name, bi.toString(), name + "=7m", args);
+
+        bi = bi.multiply(BigInteger.valueOf(1024));
+        parse(name, bi.toString(), name + "=7g", args);
+        parse(name, defaultValue, "", args);
+
+        //shouldFail(name + "=7gg", args); <---- should fail, doesn't
+        //shouldFail(name + "=7t", args);  <----- should fail, doesn't
+    }
+
+    public void parse(String searchName, String expectedValue,
+            String cmdLine, DiagnosticCommand[] argumentTypes) throws Exception {
+        //parseCommandLine will return an object array that looks like
+        //{<name of parsed object>, <of parsed object> ... }
+        Object[] res = wb.parseCommandLine(cmdLine, argumentTypes);
+        for (int i = 0; i < res.length-1; i+=2) {
+            String parsedName = (String) res[i];
+            if (searchName.equals(parsedName)) {
+                String parsedValue = (String) res[i+1];
+                if (expectedValue.equals(parsedValue)) {
+                    return;
+                } else {
+                    throw new Exception("Parsing of cmdline '" + cmdLine + "' failed!\n"
+                            + searchName + " parsed as " + parsedValue
+                            + "! Expected: " + expectedValue);
+                }
+            }
+        }
+        throw new Exception(searchName + " not found as a parsed Argument!");
+    }
+
+    private void shouldFail(String argument, DiagnosticCommand[] argumentTypes) throws Exception {
+        try {
+            wb.parseCommandLine(argument, argumentTypes);
+            throw new Exception("Parser accepted argument: " + argument);
+        } catch (IllegalArgumentException e) {
+            //expected
+        }
+    }
+}