alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (c1_Compilation.hpp)

This example Java source code file (c1_Compilation.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arena, c1_macroassembler, c1updatemethoddata, compilation, compilationresourceobj, complevel_full_profile, exceptioninfo, instruction, instructionmark, linearscan, product, share_vm_c1_c1_compilation_hpp, xhandlers

The c1_Compilation.hpp Java example source code

/*
 * Copyright (c) 1999, 2013, 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_C1_C1_COMPILATION_HPP
#define SHARE_VM_C1_C1_COMPILATION_HPP

#include "ci/ciEnv.hpp"
#include "ci/ciMethodData.hpp"
#include "code/exceptionHandlerTable.hpp"
#include "memory/resourceArea.hpp"
#include "runtime/deoptimization.hpp"

class CompilationResourceObj;
class XHandlers;
class ExceptionInfo;
class DebugInformationRecorder;
class FrameMap;
class IR;
class IRScope;
class Instruction;
class LinearScan;
class OopMap;
class LIR_Emitter;
class LIR_Assembler;
class CodeEmitInfo;
class ciEnv;
class ciMethod;
class ValueStack;
class LIR_OprDesc;
class C1_MacroAssembler;
class CFGPrinter;
typedef LIR_OprDesc* LIR_Opr;


define_array(BasicTypeArray, BasicType)
define_stack(BasicTypeList, BasicTypeArray)

define_array(ExceptionInfoArray, ExceptionInfo*)
define_stack(ExceptionInfoList,  ExceptionInfoArray)

class Compilation: public StackObj {
  friend class CompilationResourceObj;
 private:
  // compilation specifics
  Arena* _arena;
  int _next_id;
  int _next_block_id;
  AbstractCompiler*  _compiler;
  ciEnv*             _env;
  CompileLog*        _log;
  ciMethod*          _method;
  int                _osr_bci;
  IR*                _hir;
  int                _max_spills;
  FrameMap*          _frame_map;
  C1_MacroAssembler* _masm;
  bool               _has_exception_handlers;
  bool               _has_fpu_code;
  bool               _has_unsafe_access;
  bool               _would_profile;
  bool               _has_method_handle_invokes;  // True if this method has MethodHandle invokes.
  const char*        _bailout_msg;
  ExceptionInfoList* _exception_info_list;
  ExceptionHandlerTable _exception_handler_table;
  ImplicitExceptionTable _implicit_exception_table;
  LinearScan*        _allocator;
  CodeOffsets        _offsets;
  CodeBuffer         _code;
  bool               _has_access_indexed;

  // compilation helpers
  void initialize();
  void build_hir();
  void emit_lir();

  void emit_code_epilog(LIR_Assembler* assembler);
  int  emit_code_body();

  int  compile_java_method();
  void install_code(int frame_size);
  void compile_method();

  void generate_exception_handler_table();

  ExceptionInfoList* exception_info_list() const { return _exception_info_list; }
  ExceptionHandlerTable* exception_handler_table() { return &_exception_handler_table; }

  LinearScan* allocator()                          { return _allocator;      }
  void        set_allocator(LinearScan* allocator) { _allocator = allocator; }

  Instruction*       _current_instruction;       // the instruction currently being processed
#ifndef PRODUCT
  Instruction*       _last_instruction_printed;  // the last instruction printed during traversal
#endif // PRODUCT

 public:
  // creation
  Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method,
              int osr_bci, BufferBlob* buffer_blob);
  ~Compilation();


  static Compilation* current() {
    return (Compilation*) ciEnv::current()->compiler_data();
  }

  // accessors
  ciEnv* env() const                             { return _env; }
  CompileLog* log() const                        { return _log; }
  AbstractCompiler* compiler() const             { return _compiler; }
  bool has_exception_handlers() const            { return _has_exception_handlers; }
  bool has_fpu_code() const                      { return _has_fpu_code; }
  bool has_unsafe_access() const                 { return _has_unsafe_access; }
  int max_vector_size() const                    { return 0; }
  ciMethod* method() const                       { return _method; }
  int osr_bci() const                            { return _osr_bci; }
  bool is_osr_compile() const                    { return osr_bci() >= 0; }
  IR* hir() const                                { return _hir; }
  int max_spills() const                         { return _max_spills; }
  FrameMap* frame_map() const                    { return _frame_map; }
  CodeBuffer* code()                             { return &_code; }
  C1_MacroAssembler* masm() const                { return _masm; }
  CodeOffsets* offsets()                         { return &_offsets; }
  Arena* arena()                                 { return _arena; }
  bool has_access_indexed()                      { return _has_access_indexed; }

  // Instruction ids
  int get_next_id()                              { return _next_id++; }
  int number_of_instructions() const             { return _next_id; }

  // BlockBegin ids
  int get_next_block_id()                        { return _next_block_id++; }
  int number_of_blocks() const                   { return _next_block_id; }

  // setters
  void set_has_exception_handlers(bool f)        { _has_exception_handlers = f; }
  void set_has_fpu_code(bool f)                  { _has_fpu_code = f; }
  void set_has_unsafe_access(bool f)             { _has_unsafe_access = f; }
  void set_would_profile(bool f)                 { _would_profile = f; }
  void set_has_access_indexed(bool f)            { _has_access_indexed = f; }
  // Add a set of exception handlers covering the given PC offset
  void add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers);
  // Statistics gathering
  void notice_inlined_method(ciMethod* method);

  // JSR 292
  bool     has_method_handle_invokes() const { return _has_method_handle_invokes;     }
  void set_has_method_handle_invokes(bool z) {        _has_method_handle_invokes = z; }

  DebugInformationRecorder* debug_info_recorder() const; // = _env->debug_info();
  Dependencies* dependency_recorder() const; // = _env->dependencies()
  ImplicitExceptionTable* implicit_exception_table()     { return &_implicit_exception_table; }

  Instruction* current_instruction() const       { return _current_instruction; }
  Instruction* set_current_instruction(Instruction* instr) {
    Instruction* previous = _current_instruction;
    _current_instruction = instr;
    return previous;
  }

#ifndef PRODUCT
  void maybe_print_current_instruction();
#endif // PRODUCT

  // error handling
  void bailout(const char* msg);
  bool bailed_out() const                        { return _bailout_msg != NULL; }
  const char* bailout_msg() const                { return _bailout_msg; }

  static int desired_max_code_buffer_size() {
#ifndef PPC
    return (int) NMethodSizeLimit;  // default 256K or 512K
#else
    // conditional branches on PPC are restricted to 16 bit signed
    return MIN2((unsigned int)NMethodSizeLimit,32*K);
#endif
  }
  static int desired_max_constant_size() {
    return desired_max_code_buffer_size() / 10;
  }

  static bool setup_code_buffer(CodeBuffer* cb, int call_stub_estimate);

  // timers
  static void print_timers();

#ifndef PRODUCT
  // debugging support.
  // produces a file named c1compileonly in the current directory with
  // directives to compile only the current method and it's inlines.
  // The file can be passed to the command line option -XX:Flags=<filename>
  void compile_only_this_method();
  void compile_only_this_scope(outputStream* st, IRScope* scope);
  void exclude_this_method();
#endif // PRODUCT

  bool is_profiling() {
    return env()->comp_level() == CompLevel_full_profile ||
           env()->comp_level() == CompLevel_limited_profile;
  }
  bool count_invocations() { return is_profiling(); }
  bool count_backedges()   { return is_profiling(); }

  // Helpers for generation of profile information
  bool profile_branches() {
    return env()->comp_level() == CompLevel_full_profile &&
      C1UpdateMethodData && C1ProfileBranches;
  }
  bool profile_calls() {
    return env()->comp_level() == CompLevel_full_profile &&
      C1UpdateMethodData && C1ProfileCalls;
  }
  bool profile_inlined_calls() {
    return profile_calls() && C1ProfileInlinedCalls;
  }
  bool profile_checkcasts() {
    return env()->comp_level() == CompLevel_full_profile &&
      C1UpdateMethodData && C1ProfileCheckcasts;
  }
  bool profile_parameters() {
    return env()->comp_level() == CompLevel_full_profile &&
      C1UpdateMethodData && MethodData::profile_parameters();
  }
  bool profile_arguments() {
    return env()->comp_level() == CompLevel_full_profile &&
      C1UpdateMethodData && MethodData::profile_arguments();
  }
  bool profile_return() {
    return env()->comp_level() == CompLevel_full_profile &&
      C1UpdateMethodData && MethodData::profile_return();
  }
  // will compilation make optimistic assumptions that might lead to
  // deoptimization and that the runtime will account for?
  bool is_optimistic() const                             {
    return !TieredCompilation &&
      (RangeCheckElimination || UseLoopInvariantCodeMotion) &&
      method()->method_data()->trap_count(Deoptimization::Reason_none) == 0;
  }

  ciKlass* cha_exact_type(ciType* type);
};


// Macro definitions for unified bailout-support
// The methods bailout() and bailed_out() are present in all classes
// that might bailout, but forward all calls to Compilation
#define BAILOUT(msg)               { bailout(msg); return;              }
#define BAILOUT_(msg, res)         { bailout(msg); return res;          }

#define CHECK_BAILOUT()            { if (bailed_out()) return;          }
#define CHECK_BAILOUT_(res)        { if (bailed_out()) return res;      }


class InstructionMark: public StackObj {
 private:
  Compilation* _compilation;
  Instruction*  _previous;

 public:
  InstructionMark(Compilation* compilation, Instruction* instr) {
    _compilation = compilation;
    _previous = _compilation->set_current_instruction(instr);
  }
  ~InstructionMark() {
    _compilation->set_current_instruction(_previous);
  }
};


//----------------------------------------------------------------------
// Base class for objects allocated by the compiler in the compilation arena
class CompilationResourceObj ALLOCATION_SUPER_CLASS_SPEC {
 public:
  void* operator new(size_t size) throw() { return Compilation::current()->arena()->Amalloc(size); }
  void* operator new(size_t size, Arena* arena) throw() {
    return arena->Amalloc(size);
  }
  void  operator delete(void* p) {} // nothing to do
};


//----------------------------------------------------------------------
// Class for aggregating exception handler information.

// Effectively extends XHandlers class with PC offset of
// potentially exception-throwing instruction.
// This class is used at the end of the compilation to build the
// ExceptionHandlerTable.
class ExceptionInfo: public CompilationResourceObj {
 private:
  int             _pco;                // PC of potentially exception-throwing instruction
  XHandlers*      _exception_handlers; // flat list of exception handlers covering this PC

 public:
  ExceptionInfo(int pco, XHandlers* exception_handlers)
    : _pco(pco)
    , _exception_handlers(exception_handlers)
  { }

  int pco()                                      { return _pco; }
  XHandlers* exception_handlers()                { return _exception_handlers; }
};

#endif // SHARE_VM_C1_C1_COMPILATION_HPP

Other Java examples (source code examples)

Here is a short list of links related to this Java c1_Compilation.hpp source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.