jdk8-mips64-public/hotspot: src/share/vm/oops/constMethod.hpp@fdde6a70ea85 (annotated)

src/share/vm/oops/constMethod.hpp@fdde6a70ea85 (annotated)

src/share/vm/oops/constMethod.hpp

Tue, 17 Mar 2015 17:11:14 -0700

author: sspitsyn
date: Tue, 17 Mar 2015 17:11:14 -0700
changeset 7636: fdde6a70ea85
parent 4837: 0c3ee6f1fa23
child 7994: 04ff2f6cd0eb
child 8368: 32b682649973
permissions: -rw-r--r--

8046246: the constantPoolCacheOopDesc::adjust_method_entries() used in RedefineClasses does not scale
Summary: optimize the adjust_method_entries functions by using the orig_method_idnum() function
Reviewed-by: coleenp, dcubed

 /*
  * Copyright (c) 2003, 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
  * 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_OOPS_CONSTMETHODOOP_HPP
 #define SHARE_VM_OOPS_CONSTMETHODOOP_HPP
 #include "oops/oop.hpp"
 // An ConstMethod* represents portions of a Java method which
 // do not vary.
 //
 // Memory layout (each line represents a word). Note that most
 // applications load thousands of methods, so keeping the size of this
 // structure small has a big impact on footprint.
 //
 // |------------------------------------------------------|
 // | header                                               |
 // | klass                                                |
 // |------------------------------------------------------|
 // | fingerprint 1                                        |
 // | fingerprint 2                                        |
 // | constants                      (oop)                 |
 // | stackmap_data                  (oop)                 |
 // | constMethod_size                                     |
 // | interp_kind  | flags    | code_size                  |
 // | name index              | signature index            |
 // | method_idnum            | max_stack                  |
 // | max_locals              | size_of_parameters         |
 // |------------------------------------------------------|
 // |                                                      |
 // | byte codes                                           |
 // |                                                      |
 // |------------------------------------------------------|
 // | compressed linenumber table                          |
 // |  (see class CompressedLineNumberReadStream)          |
 // |  (note that length is unknown until decompressed)    |
 // |  (access flags bit tells whether table is present)   |
 // |  (indexed from start of ConstMethod*)                |
 // |  (elements not necessarily sorted!)                  |
 // |------------------------------------------------------|
 // | localvariable table elements + length (length last)  |
 // |  (length is u2, elements are 6-tuples of u2)         |
 // |  (see class LocalVariableTableElement)               |
 // |  (access flags bit tells whether table is present)   |
 // |  (indexed from end of ConstMethod*)                  |
 // |------------------------------------------------------|
 // | exception table + length (length last)               |
 // |  (length is u2, elements are 4-tuples of u2)         |
 // |  (see class ExceptionTableElement)                   |
 // |  (access flags bit tells whether table is present)   |
 // |  (indexed from end of ConstMethod*)                  |
 // |------------------------------------------------------|
 // | checked exceptions elements + length (length last)   |
 // |  (length is u2, elements are u2)                     |
 // |  (see class CheckedExceptionElement)                 |
 // |  (access flags bit tells whether table is present)   |
 // |  (indexed from end of ConstMethod*)                  |
 // |------------------------------------------------------|
 // | method parameters elements + length (length last)    |
 // |  (length is u2, elements are u2, u4 structures)      |
 // |  (see class MethodParametersElement)                 |
 // |  (access flags bit tells whether table is present)   |
 // |  (indexed from end of ConstMethod*)                  |
 // |------------------------------------------------------|
 // | generic signature index (u2)                         |
 // |  (indexed from start of constMethodOop)              |
 // |------------------------------------------------------|
 // | annotations arrays - method, parameter, type, default|
 // | pointer to Array<u1> if annotation is present        |
 // |------------------------------------------------------|
 //
 // IMPORTANT: If anything gets added here, there need to be changes to
 // ensure that ServicabilityAgent doesn't get broken as a result!
 // Utility class describing elements in checked exceptions table inlined in Method*.
 class CheckedExceptionElement VALUE_OBJ_CLASS_SPEC {
  public:
   u2 class_cp_index;
 };
 // Utility class describing elements in local variable table inlined in Method*.
 class LocalVariableTableElement VALUE_OBJ_CLASS_SPEC {
  public:
   u2 start_bci;
   u2 length;
   u2 name_cp_index;
   u2 descriptor_cp_index;
   u2 signature_cp_index;
   u2 slot;
 };
 // Utility class describing elements in exception table
 class ExceptionTableElement VALUE_OBJ_CLASS_SPEC {
  public:
   u2 start_pc;
   u2 end_pc;
   u2 handler_pc;
   u2 catch_type_index;
 };
 // Utility class describing elements in method parameters
 class MethodParametersElement VALUE_OBJ_CLASS_SPEC {
  public:
   u2 name_cp_index;
   u2 flags;
 };
 class KlassSizeStats;
 // Class to collect the sizes of ConstMethod inline tables
 #define INLINE_TABLES_DO(do_element)            \
   do_element(localvariable_table_length)        \
   do_element(compressed_linenumber_size)        \
   do_element(exception_table_length)            \
   do_element(checked_exceptions_length)         \
   do_element(method_parameters_length)          \
   do_element(generic_signature_index)           \
   do_element(method_annotations_length)         \
   do_element(parameter_annotations_length)      \
   do_element(type_annotations_length)           \
   do_element(default_annotations_length)
 #define INLINE_TABLE_DECLARE(sym)    int _##sym;
 #define INLINE_TABLE_PARAM(sym)      int sym,
 #define INLINE_TABLE_INIT(sym)       _##sym(sym),
 #define INLINE_TABLE_NULL(sym)       _##sym(0),
 #define INLINE_TABLE_ACCESSOR(sym)   int sym() const { return _##sym; }
 class InlineTableSizes : StackObj {
   // declarations
   INLINE_TABLES_DO(INLINE_TABLE_DECLARE)
   int _end;
  public:
   InlineTableSizes(
       INLINE_TABLES_DO(INLINE_TABLE_PARAM)
       int end) :
       INLINE_TABLES_DO(INLINE_TABLE_INIT)
       _end(end) {}
   // Default constructor for no inlined tables
   InlineTableSizes() :
       INLINE_TABLES_DO(INLINE_TABLE_NULL)
       _end(0) {}
   // Accessors
   INLINE_TABLES_DO(INLINE_TABLE_ACCESSOR)
 };
 #undef INLINE_TABLE_ACCESSOR
 #undef INLINE_TABLE_NULL
 #undef INLINE_TABLE_INIT
 #undef INLINE_TABLE_PARAM
 #undef INLINE_TABLE_DECLARE
 class ConstMethod : public MetaspaceObj {
   friend class VMStructs;
 public:
   typedef enum { NORMAL, OVERPASS } MethodType;
 private:
   enum {
     _has_linenumber_table = 0x0001,
     _has_checked_exceptions = 0x0002,
     _has_localvariable_table = 0x0004,
     _has_exception_table = 0x0008,
     _has_generic_signature = 0x0010,
     _has_method_parameters = 0x0020,
     _is_overpass = 0x0040,
     _has_method_annotations = 0x0080,
     _has_parameter_annotations = 0x0100,
     _has_type_annotations = 0x0200,
     _has_default_annotations = 0x0400
   };
   // Bit vector of signature
   // Callers interpret 0=not initialized yet and
   // -1=too many args to fix, must parse the slow way.
   // The real initial value is special to account for nonatomicity of 64 bit
   // loads and stores.  This value may updated and read without a lock by
   // multiple threads, so is volatile.
   volatile uint64_t _fingerprint;
   ConstantPool*     _constants;                  // Constant pool
   // Raw stackmap data for the method
   Array<u1>*        _stackmap_data;
   int               _constMethod_size;
   u2                _flags;
   // Size of Java bytecodes allocated immediately after Method*.
   u2                _code_size;
   u2                _name_index;                 // Method name (index in constant pool)
   u2                _signature_index;            // Method signature (index in constant pool)
   u2                _method_idnum;               // unique identification number for the method within the class
                                                  // initially corresponds to the index into the methods array.
                                                  // but this may change with redefinition
   u2                _max_stack;                  // Maximum number of entries on the expression stack
   u2                _max_locals;                 // Number of local variables used by this method
   u2                _size_of_parameters;         // size of the parameter block (receiver + arguments) in words
   u2                _orig_method_idnum;          // Original unique identification number for the method
   // Constructor
   ConstMethod(int byte_code_size,
               InlineTableSizes* sizes,
               MethodType is_overpass,
               int size);
 public:
   static ConstMethod* allocate(ClassLoaderData* loader_data,
                                int byte_code_size,
                                InlineTableSizes* sizes,
                                MethodType mt,
                                TRAPS);
   bool is_constMethod() const { return true; }
   // Inlined tables
   void set_inlined_tables_length(InlineTableSizes* sizes);
   bool has_generic_signature() const
     { return (_flags & _has_generic_signature) != 0; }
   bool has_linenumber_table() const
     { return (_flags & _has_linenumber_table) != 0; }
   bool has_checked_exceptions() const
     { return (_flags & _has_checked_exceptions) != 0; }
   bool has_localvariable_table() const
     { return (_flags & _has_localvariable_table) != 0; }
   bool has_exception_handler() const
     { return (_flags & _has_exception_table) != 0; }
   bool has_method_parameters() const
     { return (_flags & _has_method_parameters) != 0; }
   MethodType method_type() const {
     return ((_flags & _is_overpass) == 0) ? NORMAL : OVERPASS;
   }
   void set_method_type(MethodType mt) {
     if (mt == NORMAL) {
       _flags &= ~(_is_overpass);
     } else {
       _flags |= _is_overpass;
     }
   }
   // constant pool
   ConstantPool* constants() const        { return _constants; }
   void set_constants(ConstantPool* c)    { _constants = c; }
   Method* method() const;
   // stackmap table data
   Array<u1>* stackmap_data() const { return _stackmap_data; }
   void set_stackmap_data(Array<u1>* sd) { _stackmap_data = sd; }
   void copy_stackmap_data(ClassLoaderData* loader_data, u1* sd, int length, TRAPS);
   bool has_stackmap_table() const { return _stackmap_data != NULL; }
   void init_fingerprint() {
     const uint64_t initval = CONST64(0x8000000000000000);
     _fingerprint = initval;
   }
   uint64_t fingerprint() const                   {
     // Since reads aren't atomic for 64 bits, if any of the high or low order
     // word is the initial value, return 0.  See init_fingerprint for initval.
     uint high_fp = (uint)(_fingerprint >> 32);
     if ((int) _fingerprint == 0 || high_fp == 0x80000000) {
       return 0L;
     } else {
       return _fingerprint;
     }
   }
   uint64_t set_fingerprint(uint64_t new_fingerprint) {
 #ifdef ASSERT
     // Assert only valid if complete/valid 64 bit _fingerprint value is read.
     uint64_t oldfp = fingerprint();
 #endif // ASSERT
     _fingerprint = new_fingerprint;
     assert(oldfp == 0L || new_fingerprint == oldfp,
            "fingerprint cannot change");
     assert(((new_fingerprint >> 32) != 0x80000000) && (int)new_fingerprint !=0,
            "fingerprint should call init to set initial value");
     return new_fingerprint;
   }
   // name
   int name_index() const                         { return _name_index; }
   void set_name_index(int index)                 { _name_index = index; }
   // signature
   int signature_index() const                    { return _signature_index; }
   void set_signature_index(int index)            { _signature_index = index; }
   // generics support
   int generic_signature_index() const            {
     if (has_generic_signature()) {
       return *generic_signature_index_addr();
     } else {
       return 0;
     }
   }
   void set_generic_signature_index(u2 index)    {
     assert(has_generic_signature(), "");
     u2* addr = generic_signature_index_addr();
     *addr = index;
   }
   // Sizing
   static int header_size() {
     return sizeof(ConstMethod)/HeapWordSize;
   }
   // Size needed
   static int size(int code_size, InlineTableSizes* sizes);
   int size() const                    { return _constMethod_size;}
   void set_constMethod_size(int size)     { _constMethod_size = size; }
 #if INCLUDE_SERVICES
   void collect_statistics(KlassSizeStats *sz) const;
 #endif
   // code size
   int code_size() const                          { return _code_size; }
   void set_code_size(int size) {
     assert(max_method_code_size < (1 << 16),
            "u2 is too small to hold method code size in general");
     assert(0 <= size && size <= max_method_code_size, "invalid code size");
     _code_size = size;
   }
   // linenumber table - note that length is unknown until decompression,
   // see class CompressedLineNumberReadStream.
   u_char* compressed_linenumber_table() const;         // not preserved by gc
   u2* generic_signature_index_addr() const;
   u2* checked_exceptions_length_addr() const;
   u2* localvariable_table_length_addr() const;
   u2* exception_table_length_addr() const;
   u2* method_parameters_length_addr() const;
   // checked exceptions
   int checked_exceptions_length() const;
   CheckedExceptionElement* checked_exceptions_start() const;
   // localvariable table
   int localvariable_table_length() const;
   LocalVariableTableElement* localvariable_table_start() const;
   // exception table
   int exception_table_length() const;
   ExceptionTableElement* exception_table_start() const;
   // method parameters table
   int method_parameters_length() const;
   MethodParametersElement* method_parameters_start() const;
   // method annotations
   bool has_method_annotations() const
     { return (_flags & _has_method_annotations) != 0; }
   bool has_parameter_annotations() const
     { return (_flags & _has_parameter_annotations) != 0; }
   bool has_type_annotations() const
     { return (_flags & _has_type_annotations) != 0; }
   bool has_default_annotations() const
     { return (_flags & _has_default_annotations) != 0; }
   AnnotationArray** method_annotations_addr() const;
   AnnotationArray* method_annotations() const  {
     return has_method_annotations() ? *(method_annotations_addr()) : NULL;
   }
   void set_method_annotations(AnnotationArray* anno) {
     *(method_annotations_addr()) = anno;
   }
   AnnotationArray** parameter_annotations_addr() const;
   AnnotationArray* parameter_annotations() const {
     return has_parameter_annotations() ? *(parameter_annotations_addr()) : NULL;
   }
   void set_parameter_annotations(AnnotationArray* anno) {
     *(parameter_annotations_addr()) = anno;
   }
   AnnotationArray** type_annotations_addr() const;
   AnnotationArray* type_annotations() const {
     return has_type_annotations() ? *(type_annotations_addr()) : NULL;
   }
   void set_type_annotations(AnnotationArray* anno) {
     *(type_annotations_addr()) = anno;
   }
   AnnotationArray** default_annotations_addr() const;
   AnnotationArray* default_annotations() const {
     return has_default_annotations() ? *(default_annotations_addr()) : NULL;
   }
   void set_default_annotations(AnnotationArray* anno) {
     *(default_annotations_addr()) = anno;
   }
   int method_annotations_length() const {
     return has_method_annotations() ? method_annotations()->length() : 0;
   }
   int parameter_annotations_length() const {
     return has_parameter_annotations() ? parameter_annotations()->length() : 0;
   }
   int type_annotations_length() const {
     return has_type_annotations() ? type_annotations()->length() : 0;
   }
   int default_annotations_length() const {
     return has_default_annotations() ? default_annotations()->length() : 0;
   }
   // Copy annotations from other ConstMethod
   void copy_annotations_from(ConstMethod* cm);
   // byte codes
   void    set_code(address code) {
     if (code_size() > 0) {
       memcpy(code_base(), code, code_size());
     }
   }
   address code_base() const            { return (address) (this+1); }
   address code_end() const             { return code_base() + code_size(); }
   bool    contains(address bcp) const  { return code_base() <= bcp
                                                      && bcp < code_end(); }
   // Offset to bytecodes
   static ByteSize codes_offset()
                             { return in_ByteSize(sizeof(ConstMethod)); }
   static ByteSize constants_offset()
                             { return byte_offset_of(ConstMethod, _constants); }
   static ByteSize max_stack_offset()
                             { return byte_offset_of(ConstMethod, _max_stack); }
   static ByteSize size_of_locals_offset()
                             { return byte_offset_of(ConstMethod, _max_locals); }
   static ByteSize size_of_parameters_offset()
                             { return byte_offset_of(ConstMethod, _size_of_parameters); }
   // Unique id for the method
   static const u2 MAX_IDNUM;
   static const u2 UNSET_IDNUM;
   u2 method_idnum() const                        { return _method_idnum; }
   void set_method_idnum(u2 idnum)                { _method_idnum = idnum; }
   u2 orig_method_idnum() const                   { return _orig_method_idnum; }
   void set_orig_method_idnum(u2 idnum)           { _orig_method_idnum = idnum; }
   // max stack
   int  max_stack() const                         { return _max_stack; }
   void set_max_stack(int size)                   { _max_stack = size; }
   // max locals
   int  max_locals() const                        { return _max_locals; }
   void set_max_locals(int size)                  { _max_locals = size; }
   // size of parameters
   int  size_of_parameters() const                { return _size_of_parameters; }
   void set_size_of_parameters(int size)          { _size_of_parameters = size; }
   // Deallocation for RedefineClasses
   void deallocate_contents(ClassLoaderData* loader_data);
   bool is_klass() const { return false; }
   DEBUG_ONLY(bool on_stack() { return false; })
 private:
   // Since the size of the compressed line number table is unknown, the
   // offsets of the other variable sized sections are computed backwards
   // from the end of the ConstMethod*.
   // First byte after ConstMethod*
   address constMethod_end() const
                           { return (address)((intptr_t*)this + _constMethod_size); }
   // Last short in ConstMethod*
   u2* last_u2_element() const;
  public:
   // Printing
   void print_on      (outputStream* st) const;
   void print_value_on(outputStream* st) const;
   const char* internal_name() const { return "{constMethod}"; }
   // Verify
   void verify_on(outputStream* st);
 };
 #endif // SHARE_VM_OOPS_CONSTMETHODOOP_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/constMethod.hpp@fdde6a70ea85 (annotated)

src/share/vm/oops/constMethod.hpp