hotspot/src/share/vm/asm/codeBuffer.hpp
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Thu, 27 May 2010 19:08:38 -0700
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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
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/*
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 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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class  CodeComments;
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class  AbstractAssembler;
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class  MacroAssembler;
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class  PhaseCFG;
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class  Compile;
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class  BufferBlob;
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class  CodeBuffer;
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class CodeOffsets: public StackObj {
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public:
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  enum Entries { Entry,
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                 Verified_Entry,
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                 Frame_Complete, // Offset in the code where the frame setup is (for forte stackwalks) is complete
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                 OSR_Entry,
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                 Dtrace_trap = OSR_Entry,  // dtrace probes can never have an OSR entry so reuse it
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                 Exceptions,     // Offset where exception handler lives
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                 Deopt,          // Offset where deopt handler lives
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                 DeoptMH,        // Offset where MethodHandle deopt handler lives
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                 UnwindHandler,  // Offset to default unwind handler
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                 max_Entries };
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  // special value to note codeBlobs where profile (forte) stack walking is
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  // always dangerous and suspect.
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  enum { frame_never_safe = -1 };
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private:
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  int _values[max_Entries];
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  CodeOffsets() {
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    _values[Entry         ] = 0;
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    _values[Verified_Entry] = 0;
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    _values[Frame_Complete] = frame_never_safe;
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    _values[OSR_Entry     ] = 0;
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    _values[Exceptions    ] = -1;
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    _values[Deopt         ] = -1;
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    _values[DeoptMH       ] = -1;
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    _values[UnwindHandler ] = -1;
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  }
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  int value(Entries e) { return _values[e]; }
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  void set_value(Entries e, int val) { _values[e] = val; }
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};
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// This class represents a stream of code and associated relocations.
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// There are a few in each CodeBuffer.
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// They are filled concurrently, and concatenated at the end.
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class CodeSection VALUE_OBJ_CLASS_SPEC {
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  friend class CodeBuffer;
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 public:
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  typedef int csize_t;  // code size type; would be size_t except for history
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  address     _start;           // first byte of contents (instructions)
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  address     _mark;            // user mark, usually an instruction beginning
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  address     _end;             // current end address
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  address     _limit;           // last possible (allocated) end address
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  relocInfo*  _locs_start;      // first byte of relocation information
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  relocInfo*  _locs_end;        // first byte after relocation information
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  relocInfo*  _locs_limit;      // first byte after relocation information buf
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  address     _locs_point;      // last relocated position (grows upward)
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  bool        _locs_own;        // did I allocate the locs myself?
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  bool        _frozen;          // no more expansion of this section
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  char        _index;           // my section number (SECT_INST, etc.)
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  CodeBuffer* _outer;           // enclosing CodeBuffer
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  // (Note:  _locs_point used to be called _last_reloc_offset.)
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  CodeSection() {
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    _start         = NULL;
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    _mark          = NULL;
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    _end           = NULL;
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    _limit         = NULL;
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    _locs_start    = NULL;
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    _locs_end      = NULL;
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    _locs_limit    = NULL;
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    _locs_point    = NULL;
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    _locs_own      = false;
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    _frozen        = false;
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    debug_only(_index = -1);
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    debug_only(_outer = (CodeBuffer*)badAddress);
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  }
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  void initialize_outer(CodeBuffer* outer, int index) {
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    _outer = outer;
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    _index = index;
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  }
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  void initialize(address start, csize_t size = 0) {
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    assert(_start == NULL, "only one init step, please");
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    _start         = start;
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    _mark          = NULL;
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    _end           = start;
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    _limit         = start + size;
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    _locs_point    = start;
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  }
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  void initialize_locs(int locs_capacity);
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  void expand_locs(int new_capacity);
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  void initialize_locs_from(const CodeSection* source_cs);
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  // helper for CodeBuffer::expand()
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  void take_over_code_from(CodeSection* cs) {
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    _start      = cs->_start;
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    _mark       = cs->_mark;
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    _end        = cs->_end;
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    _limit      = cs->_limit;
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    _locs_point = cs->_locs_point;
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  }
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  address     start() const         { return _start; }
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  address     mark() const          { return _mark; }
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  address     end() const           { return _end; }
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  address     limit() const         { return _limit; }
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  csize_t     size() const          { return (csize_t)(_end - _start); }
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  csize_t     mark_off() const      { assert(_mark != NULL, "not an offset");
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                                      return (csize_t)(_mark - _start); }
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  csize_t     capacity() const      { return (csize_t)(_limit - _start); }
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  csize_t     remaining() const     { return (csize_t)(_limit - _end); }
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  relocInfo*  locs_start() const    { return _locs_start; }
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  relocInfo*  locs_end() const      { return _locs_end; }
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  int         locs_count() const    { return (int)(_locs_end - _locs_start); }
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  relocInfo*  locs_limit() const    { return _locs_limit; }
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  address     locs_point() const    { return _locs_point; }
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  csize_t     locs_point_off() const{ return (csize_t)(_locs_point - _start); }
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  csize_t     locs_capacity() const { return (csize_t)(_locs_limit - _locs_start); }
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  csize_t     locs_remaining()const { return (csize_t)(_locs_limit - _locs_end); }
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  int         index() const         { return _index; }
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  bool        is_allocated() const  { return _start != NULL; }
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  bool        is_empty() const      { return _start == _end; }
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  bool        is_frozen() const     { return _frozen; }
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  bool        has_locs() const      { return _locs_end != NULL; }
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  CodeBuffer* outer() const         { return _outer; }
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  // is a given address in this section?  (2nd version is end-inclusive)
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  bool contains(address pc) const   { return pc >= _start && pc <  _end; }
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  bool contains2(address pc) const  { return pc >= _start && pc <= _end; }
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  bool allocates(address pc) const  { return pc >= _start && pc <  _limit; }
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  bool allocates2(address pc) const { return pc >= _start && pc <= _limit; }
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  void    set_end(address pc)       { assert(allocates2(pc),""); _end = pc; }
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  void    set_mark(address pc)      { assert(contains2(pc),"not in codeBuffer");
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                                      _mark = pc; }
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  void    set_mark_off(int offset)  { assert(contains2(offset+_start),"not in codeBuffer");
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                                      _mark = offset + _start; }
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  void    set_mark()                { _mark = _end; }
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  void    clear_mark()              { _mark = NULL; }
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  void    set_locs_end(relocInfo* p) {
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    assert(p <= locs_limit(), "locs data fits in allocated buffer");
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    _locs_end = p;
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  }
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  void    set_locs_point(address pc) {
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    assert(pc >= locs_point(), "relocation addr may not decrease");
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    assert(allocates2(pc),     "relocation addr must be in this section");
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    _locs_point = pc;
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  }
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  // Share a scratch buffer for relocinfo.  (Hacky; saves a resource allocation.)
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  void initialize_shared_locs(relocInfo* buf, int length);
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  // Manage labels and their addresses.
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  address target(Label& L, address branch_pc);
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  // Emit a relocation.
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  void relocate(address at, RelocationHolder const& rspec, int format = 0);
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  void relocate(address at,    relocInfo::relocType rtype, int format = 0) {
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    if (rtype != relocInfo::none)
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      relocate(at, Relocation::spec_simple(rtype), format);
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  }
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  // alignment requirement for starting offset
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  // Requirements are that the instruction area and the
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  // stubs area must start on CodeEntryAlignment, and
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  // the ctable on sizeof(jdouble)
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  int alignment() const             { return MAX2((int)sizeof(jdouble), (int)CodeEntryAlignment); }
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  // Slop between sections, used only when allocating temporary BufferBlob buffers.
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  static csize_t end_slop()         { return MAX2((int)sizeof(jdouble), (int)CodeEntryAlignment); }
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  csize_t align_at_start(csize_t off) const { return (csize_t) align_size_up(off, alignment()); }
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  // Mark a section frozen.  Assign its remaining space to
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  // the following section.  It will never expand after this point.
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  inline void freeze();         //  { _outer->freeze_section(this); }
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  // Ensure there's enough space left in the current section.
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  // Return true if there was an expansion.
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  bool maybe_expand_to_ensure_remaining(csize_t amount);
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#ifndef PRODUCT
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  void decode();
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  void dump();
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  void print(const char* name);
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#endif //PRODUCT
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};
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class CodeComment;
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class CodeComments VALUE_OBJ_CLASS_SPEC {
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private:
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#ifndef PRODUCT
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  CodeComment* _comments;
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#endif
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public:
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  CodeComments() {
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#ifndef PRODUCT
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    _comments = NULL;
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#endif
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  }
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  void add_comment(intptr_t offset, const char * comment) PRODUCT_RETURN;
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  void print_block_comment(outputStream* stream, intptr_t offset)  PRODUCT_RETURN;
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  void assign(CodeComments& other)  PRODUCT_RETURN;
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  void free() PRODUCT_RETURN;
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};
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// A CodeBuffer describes a memory space into which assembly
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// code is generated.  This memory space usually occupies the
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// interior of a single BufferBlob, but in some cases it may be
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// an arbitrary span of memory, even outside the code cache.
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//
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// A code buffer comes in two variants:
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//
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// (1) A CodeBuffer referring to an already allocated piece of memory:
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//     This is used to direct 'static' code generation (e.g. for interpreter
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//     or stubroutine generation, etc.).  This code comes with NO relocation
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//     information.
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//
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// (2) A CodeBuffer referring to a piece of memory allocated when the
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//     CodeBuffer is allocated.  This is used for nmethod generation.
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//
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// The memory can be divided up into several parts called sections.
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// Each section independently accumulates code (or data) an relocations.
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// Sections can grow (at the expense of a reallocation of the BufferBlob
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// and recopying of all active sections).  When the buffered code is finally
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// written to an nmethod (or other CodeBlob), the contents (code, data,
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// and relocations) of the sections are padded to an alignment and concatenated.
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// Instructions and data in one section can contain relocatable references to
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// addresses in a sibling section.
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class CodeBuffer: public StackObj {
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  friend class CodeSection;
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 private:
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  // CodeBuffers must be allocated on the stack except for a single
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  // special case during expansion which is handled internally.  This
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  // is done to guarantee proper cleanup of resources.
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  void* operator new(size_t size) { return ResourceObj::operator new(size); }
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  void  operator delete(void* p)  {        ResourceObj::operator delete(p); }
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 public:
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  typedef int csize_t;  // code size type; would be size_t except for history
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  enum {
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    // Here is the list of all possible sections, in order of ascending address.
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    SECT_INSTS,               // Executable instructions.
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    SECT_STUBS,               // Outbound trampolines for supporting call sites.
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    SECT_CONSTS,              // Non-instruction data:  Floats, jump tables, etc.
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    SECT_LIMIT, SECT_NONE = -1
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  };
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  enum {
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    sect_bits = 2,      // assert (SECT_LIMIT <= (1<<sect_bits))
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    sect_mask = (1<<sect_bits)-1
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  };
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  const char*  _name;
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  CodeSection  _insts;              // instructions (the main section)
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  CodeSection  _stubs;              // stubs (call site support), deopt, exception handling
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  CodeSection  _consts;             // constants, jump tables
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  CodeBuffer*  _before_expand;  // dead buffer, from before the last expansion
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  BufferBlob*  _blob;           // optional buffer in CodeCache for generated code
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  address      _total_start;    // first address of combined memory buffer
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  csize_t      _total_size;     // size in bytes of combined memory buffer
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  OopRecorder* _oop_recorder;
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  CodeComments _comments;
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  OopRecorder  _default_oop_recorder;  // override with initialize_oop_recorder
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  Arena*       _overflow_arena;
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  address      _decode_begin;   // start address for decode
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  address      decode_begin();
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  void initialize_misc(const char * name) {
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    // all pointers other than code_start/end and those inside the sections
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    assert(name != NULL, "must have a name");
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    _name            = name;
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    _before_expand   = NULL;
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    _blob            = NULL;
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    _oop_recorder    = NULL;
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    _decode_begin    = NULL;
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    _overflow_arena  = NULL;
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  }
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  void initialize(address code_start, csize_t code_size) {
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    _insts.initialize_outer(this,   SECT_INSTS);
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    _stubs.initialize_outer(this,   SECT_STUBS);
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    _consts.initialize_outer(this,  SECT_CONSTS);
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    _total_start = code_start;
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    _total_size  = code_size;
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    // Initialize the main section:
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    _insts.initialize(code_start, code_size);
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    assert(!_stubs.is_allocated(),  "no garbage here");
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    assert(!_consts.is_allocated(), "no garbage here");
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    _oop_recorder = &_default_oop_recorder;
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  }
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  void initialize_section_size(CodeSection* cs, csize_t size);
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  void freeze_section(CodeSection* cs);
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  // helper for CodeBuffer::expand()
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  void take_over_code_from(CodeBuffer* cs);
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#ifdef ASSERT
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  // ensure sections are disjoint, ordered, and contained in the blob
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  bool verify_section_allocation();
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#endif
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  // copies combined relocations to the blob, returns bytes copied
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  // (if target is null, it is a dry run only, just for sizing)
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  csize_t copy_relocations_to(CodeBlob* blob) const;
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  // copies combined code to the blob (assumes relocs are already in there)
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  void copy_code_to(CodeBlob* blob);
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  // moves code sections to new buffer (assumes relocs are already in there)
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  void relocate_code_to(CodeBuffer* cb) const;
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  // set up a model of the final layout of my contents
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  void compute_final_layout(CodeBuffer* dest) const;
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  // Expand the given section so at least 'amount' is remaining.
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  // Creates a new, larger BufferBlob, and rewrites the code & relocs.
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  void expand(CodeSection* which_cs, csize_t amount);
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  // Helper for expand.
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  csize_t figure_expanded_capacities(CodeSection* which_cs, csize_t amount, csize_t* new_capacity);
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 public:
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  // (1) code buffer referring to pre-allocated instruction memory
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  CodeBuffer(address code_start, csize_t code_size);
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  // (2) code buffer allocating codeBlob memory for code & relocation
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  // info but with lazy initialization.  The name must be something
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  // informative.
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  CodeBuffer(const char* name) {
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    initialize_misc(name);
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  }
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  // (3) code buffer allocating codeBlob memory for code & relocation
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   388
  // info.  The name must be something informative and code_size must
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duke
parents:
diff changeset
   389
  // include both code and stubs sizes.
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parents:
diff changeset
   390
  CodeBuffer(const char* name, csize_t code_size, csize_t locs_size) {
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parents:
diff changeset
   391
    initialize_misc(name);
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parents:
diff changeset
   392
    initialize(code_size, locs_size);
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parents:
diff changeset
   393
  }
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diff changeset
   394
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parents:
diff changeset
   395
  ~CodeBuffer();
489c9b5090e2 Initial load
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parents:
diff changeset
   396
489c9b5090e2 Initial load
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parents:
diff changeset
   397
  // Initialize a CodeBuffer constructed using constructor 2.  Using
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
  // constructor 3 is equivalent to calling constructor 2 and then
489c9b5090e2 Initial load
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parents:
diff changeset
   399
  // calling this method.  It's been factored out for convenience of
489c9b5090e2 Initial load
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parents:
diff changeset
   400
  // construction.
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parents:
diff changeset
   401
  void initialize(csize_t code_size, csize_t locs_size);
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parents:
diff changeset
   402
489c9b5090e2 Initial load
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diff changeset
   403
  CodeSection* insts()             { return &_insts; }
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parents:
diff changeset
   404
  CodeSection* stubs()             { return &_stubs; }
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parents:
diff changeset
   405
  CodeSection* consts()            { return &_consts; }
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parents:
diff changeset
   406
489c9b5090e2 Initial load
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parents:
diff changeset
   407
  // present sections in order; return NULL at end; insts is #0, etc.
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duke
parents:
diff changeset
   408
  CodeSection* code_section(int n) {
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parents:
diff changeset
   409
    // This makes the slightly questionable but portable assumption that
489c9b5090e2 Initial load
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parents:
diff changeset
   410
    // the various members (_insts, _stubs, etc.) are adjacent in the
489c9b5090e2 Initial load
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parents:
diff changeset
   411
    // layout of CodeBuffer.
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duke
parents:
diff changeset
   412
    CodeSection* cs = &_insts + n;
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diff changeset
   413
    assert(cs->index() == n || !cs->is_allocated(), "sanity");
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parents:
diff changeset
   414
    return cs;
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parents:
diff changeset
   415
  }
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parents:
diff changeset
   416
  const CodeSection* code_section(int n) const {  // yucky const stuff
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diff changeset
   417
    return ((CodeBuffer*)this)->code_section(n);
489c9b5090e2 Initial load
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diff changeset
   418
  }
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parents:
diff changeset
   419
  static const char* code_section_name(int n);
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diff changeset
   420
  int section_index_of(address addr) const;
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   421
  bool contains(address addr) const {
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duke
parents:
diff changeset
   422
    // handy for debugging
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diff changeset
   423
    return section_index_of(addr) > SECT_NONE;
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   424
  }
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parents:
diff changeset
   425
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parents:
diff changeset
   426
  // A stable mapping between 'locators' (small ints) and addresses.
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parents:
diff changeset
   427
  static int locator_pos(int locator)   { return locator >> sect_bits; }
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parents:
diff changeset
   428
  static int locator_sect(int locator)  { return locator &  sect_mask; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
  static int locator(int pos, int sect) { return (pos << sect_bits) | sect; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
  int        locator(address addr) const;
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parents:
diff changeset
   431
  address    locator_address(int locator) const;
489c9b5090e2 Initial load
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diff changeset
   432
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parents:
diff changeset
   433
  // Properties
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parents:
diff changeset
   434
  const char* name() const                  { return _name; }
489c9b5090e2 Initial load
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parents:
diff changeset
   435
  CodeBuffer* before_expand() const         { return _before_expand; }
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parents:
diff changeset
   436
  BufferBlob* blob() const                  { return _blob; }
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parents:
diff changeset
   437
  void    set_blob(BufferBlob* blob);
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parents:
diff changeset
   438
  void   free_blob();                       // Free the blob, if we own one.
489c9b5090e2 Initial load
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parents:
diff changeset
   439
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
  // Properties relative to the insts section:
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parents:
diff changeset
   441
  address code_begin() const            { return _insts.start(); }
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parents:
diff changeset
   442
  address code_end() const              { return _insts.end();   }
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parents:
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   443
  void set_code_end(address end)        { _insts.set_end(end); }
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parents:
diff changeset
   444
  address code_limit() const            { return _insts.limit(); }
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parents:
diff changeset
   445
  address inst_mark() const             { return _insts.mark(); }
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parents:
diff changeset
   446
  void set_inst_mark()                  { _insts.set_mark(); }
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parents:
diff changeset
   447
  void clear_inst_mark()                { _insts.clear_mark(); }
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parents:
diff changeset
   448
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
  // is there anything in the buffer other than the current section?
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parents:
diff changeset
   450
  bool    is_pure() const               { return code_size() == total_code_size(); }
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parents:
diff changeset
   451
489c9b5090e2 Initial load
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parents:
diff changeset
   452
  // size in bytes of output so far in the insts sections
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duke
parents:
diff changeset
   453
  csize_t code_size() const             { return _insts.size(); }
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duke
parents:
diff changeset
   454
489c9b5090e2 Initial load
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parents:
diff changeset
   455
  // same as code_size(), except that it asserts there is no non-code here
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duke
parents:
diff changeset
   456
  csize_t pure_code_size() const        { assert(is_pure(), "no non-code");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
                                          return code_size(); }
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parents:
diff changeset
   458
  // capacity in bytes of the insts sections
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parents:
diff changeset
   459
  csize_t code_capacity() const         { return _insts.capacity(); }
489c9b5090e2 Initial load
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parents:
diff changeset
   460
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duke
parents:
diff changeset
   461
  // number of bytes remaining in the insts section
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   462
  csize_t code_remaining() const        { return _insts.remaining(); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  // is a given address in the insts section?  (2nd version is end-inclusive)
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parents:
diff changeset
   465
  bool code_contains(address pc) const  { return _insts.contains(pc); }
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parents:
diff changeset
   466
  bool code_contains2(address pc) const { return _insts.contains2(pc); }
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duke
parents:
diff changeset
   467
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
  // allocated size of code in all sections, when aligned and concatenated
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duke
parents:
diff changeset
   469
  // (this is the eventual state of the code in its final CodeBlob)
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parents:
diff changeset
   470
  csize_t total_code_size() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
  // combined offset (relative to start of insts) of given address,
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duke
parents:
diff changeset
   473
  // as eventually found in the final CodeBlob
489c9b5090e2 Initial load
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parents:
diff changeset
   474
  csize_t total_offset_of(address addr) const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
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duke
parents:
diff changeset
   476
  // allocated size of all relocation data, including index, rounded up
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
  csize_t total_relocation_size() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
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duke
parents:
diff changeset
   479
  // allocated size of any and all recorded oops
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
  csize_t total_oop_size() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
    OopRecorder* recorder = oop_recorder();
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duke
parents:
diff changeset
   482
    return (recorder == NULL)? 0: recorder->oop_size();
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duke
parents:
diff changeset
   483
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
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duke
parents:
diff changeset
   485
  // Configuration functions, called immediately after the CB is constructed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
  // The section sizes are subtracted from the original insts section.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
  // Note:  Call them in reverse section order, because each steals from insts.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
  void initialize_consts_size(csize_t size)            { initialize_section_size(&_consts,  size); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
  void initialize_stubs_size(csize_t size)             { initialize_section_size(&_stubs,   size); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
  // Override default oop recorder.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
  void initialize_oop_recorder(OopRecorder* r);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
  OopRecorder* oop_recorder() const   { return _oop_recorder; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
  CodeComments& comments()            { return _comments; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
  // Code generation
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
  void relocate(address at, RelocationHolder const& rspec, int format = 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
    _insts.relocate(at, rspec, format);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
  void relocate(address at,    relocInfo::relocType rtype, int format = 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
    _insts.relocate(at, rtype, format);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
  // Management of overflow storage for binding of Labels.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
  GrowableArray<int>* create_patch_overflow();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
  // NMethod generation
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  void copy_code_and_locs_to(CodeBlob* blob) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
    assert(blob != NULL, "sane");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
    copy_relocations_to(blob);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
    copy_code_to(blob);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
  void copy_oops_to(CodeBlob* blob) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
    if (!oop_recorder()->is_unused()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
      oop_recorder()->copy_to(blob);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
  // Transform an address from the code in this code buffer to a specified code buffer
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
  address transform_address(const CodeBuffer &cb, address addr) const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
  void block_comment(intptr_t offset, const char * comment) PRODUCT_RETURN;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
  // Printing / Decoding
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
  // decodes from decode_begin() to code_end() and sets decode_begin to end
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
  void    decode();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
  void    decode_all();         // decodes all the code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
  void    skip_decode();        // sets decode_begin to code_end();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
  void    print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
  // The following header contains architecture-specific implementations
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
  #include "incls/_codeBuffer_pd.hpp.incl"
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
inline void CodeSection::freeze() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
  _outer->freeze_section(this);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
inline bool CodeSection::maybe_expand_to_ensure_remaining(csize_t amount) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  if (remaining() < amount) { _outer->expand(this, amount); return true; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
}