1 /*
   2  * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_C1_C1_COMPILATION_HPP
  26 #define SHARE_C1_C1_COMPILATION_HPP
  27 
  28 #include "ci/ciEnv.hpp"
  29 #include "ci/ciMethodData.hpp"
  30 #include "code/exceptionHandlerTable.hpp"
  31 #include "compiler/compilerDirectives.hpp"
  32 #include "memory/resourceArea.hpp"
  33 #include "runtime/deoptimization.hpp"
  34 
  35 class CompilationResourceObj;
  36 class XHandlers;
  37 class ExceptionInfo;
  38 class DebugInformationRecorder;
  39 class FrameMap;
  40 class IR;
  41 class IRScope;
  42 class Instruction;
  43 class LinearScan;
  44 class OopMap;
  45 class LIR_Emitter;
  46 class LIR_Assembler;
  47 class CodeEmitInfo;
  48 class ciEnv;
  49 class ciMethod;
  50 class ValueStack;
  51 class LIR_OprDesc;
  52 class C1_MacroAssembler;
  53 class CFGPrinter;
  54 class CFGPrinterOutput;
  55 typedef LIR_OprDesc* LIR_Opr;
  56 
  57 typedef GrowableArray<BasicType> BasicTypeArray;
  58 typedef GrowableArray<BasicType> BasicTypeList;
  59 typedef GrowableArray<ExceptionInfo*> ExceptionInfoList;
  60 
  61 class Compilation: public StackObj {
  62   friend class CompilationResourceObj;
  63  private:
  64   // compilation specifics
  65   Arena* _arena;
  66   int _next_id;
  67   int _next_block_id;
  68   AbstractCompiler*  _compiler;
  69   DirectiveSet*      _directive;
  70   ciEnv*             _env;
  71   CompileLog*        _log;
  72   ciMethod*          _method;
  73   int                _osr_bci;
  74   IR*                _hir;
  75   int                _max_spills;
  76   FrameMap*          _frame_map;
  77   C1_MacroAssembler* _masm;
  78   bool               _has_exception_handlers;
  79   bool               _has_fpu_code;
  80   bool               _has_unsafe_access;
  81   bool               _would_profile;
  82   bool               _has_method_handle_invokes;  // True if this method has MethodHandle invokes.
  83   bool               _has_reserved_stack_access;
  84   bool               _has_monitors; // Fastpath monitors detection for Continuations
  85   const char*        _bailout_msg;
  86   ExceptionInfoList* _exception_info_list;
  87   ExceptionHandlerTable _exception_handler_table;
  88   ImplicitExceptionTable _implicit_exception_table;
  89   LinearScan*        _allocator;
  90   CodeOffsets        _offsets;
  91   CodeBuffer         _code;
  92   bool               _has_access_indexed;
  93   int                _interpreter_frame_size; // Stack space needed in case of a deoptimization
  94   int                _immediate_oops_patched;
  95 
  96   // compilation helpers
  97   void initialize();
  98   void build_hir();
  99   void emit_lir();
 100 
 101   void emit_code_epilog(LIR_Assembler* assembler);
 102   int  emit_code_body();
 103 
 104   int  compile_java_method();
 105   void install_code(int frame_size);
 106   void compile_method();
 107 
 108   void generate_exception_handler_table();
 109 
 110   ExceptionInfoList* exception_info_list() const { return _exception_info_list; }
 111   ExceptionHandlerTable* exception_handler_table() { return &_exception_handler_table; }
 112 
 113   LinearScan* allocator()                          { return _allocator;      }
 114   void        set_allocator(LinearScan* allocator) { _allocator = allocator; }
 115 
 116   Instruction*       _current_instruction;       // the instruction currently being processed
 117 #ifndef PRODUCT
 118   Instruction*       _last_instruction_printed;  // the last instruction printed during traversal
 119   CFGPrinterOutput*  _cfg_printer_output;
 120 #endif // PRODUCT
 121 
 122  public:
 123   // creation
 124   Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method,
 125               int osr_bci, BufferBlob* buffer_blob, DirectiveSet* directive);
 126   ~Compilation();
 127 
 128 
 129   static Compilation* current() {
 130     return (Compilation*) ciEnv::current()->compiler_data();
 131   }
 132 
 133   // accessors
 134   ciEnv* env() const                             { return _env; }
 135   DirectiveSet* directive() const                { return _directive; }
 136   CompileLog* log() const                        { return _log; }
 137   AbstractCompiler* compiler() const             { return _compiler; }
 138   bool has_exception_handlers() const            { return _has_exception_handlers; }
 139   bool has_fpu_code() const                      { return _has_fpu_code; }
 140   bool has_unsafe_access() const                 { return _has_unsafe_access; }
 141   bool has_monitors() const                      { return _has_monitors; }
 142   int max_vector_size() const                    { return 0; }
 143   ciMethod* method() const                       { return _method; }
 144   int osr_bci() const                            { return _osr_bci; }
 145   bool is_osr_compile() const                    { return osr_bci() >= 0; }
 146   IR* hir() const                                { return _hir; }
 147   int max_spills() const                         { return _max_spills; }
 148   FrameMap* frame_map() const                    { return _frame_map; }
 149   CodeBuffer* code()                             { return &_code; }
 150   C1_MacroAssembler* masm() const                { return _masm; }
 151   CodeOffsets* offsets()                         { return &_offsets; }
 152   Arena* arena()                                 { return _arena; }
 153   bool has_access_indexed()                      { return _has_access_indexed; }
 154 
 155   // Instruction ids
 156   int get_next_id()                              { return _next_id++; }
 157   int number_of_instructions() const             { return _next_id; }
 158 
 159   // BlockBegin ids
 160   int get_next_block_id()                        { return _next_block_id++; }
 161   int number_of_blocks() const                   { return _next_block_id; }
 162 
 163   // setters
 164   void set_has_exception_handlers(bool f)        { _has_exception_handlers = f; }
 165   void set_has_fpu_code(bool f)                  { _has_fpu_code = f; }
 166   void set_has_unsafe_access(bool f)             { _has_unsafe_access = f; }
 167   void set_would_profile(bool f)                 { _would_profile = f; }
 168   void set_has_access_indexed(bool f)            { _has_access_indexed = f; }
 169   void set_has_monitors(bool f)                  { _has_monitors = f; }
 170   // Add a set of exception handlers covering the given PC offset
 171   void add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers);
 172   // Statistics gathering
 173   void notice_inlined_method(ciMethod* method);
 174 
 175   // JSR 292
 176   bool     has_method_handle_invokes() const { return _has_method_handle_invokes;     }
 177   void set_has_method_handle_invokes(bool z) {        _has_method_handle_invokes = z; }
 178 
 179   bool     has_reserved_stack_access() const { return _has_reserved_stack_access; }
 180   void set_has_reserved_stack_access(bool z) { _has_reserved_stack_access = z; }
 181 
 182   DebugInformationRecorder* debug_info_recorder() const; // = _env->debug_info();
 183   Dependencies* dependency_recorder() const; // = _env->dependencies()
 184   ImplicitExceptionTable* implicit_exception_table()     { return &_implicit_exception_table; }
 185 
 186   Instruction* current_instruction() const       { return _current_instruction; }
 187   Instruction* set_current_instruction(Instruction* instr) {
 188     Instruction* previous = _current_instruction;
 189     _current_instruction = instr;
 190     return previous;
 191   }
 192 
 193 #ifndef PRODUCT
 194   void maybe_print_current_instruction();
 195   CFGPrinterOutput* cfg_printer_output() {
 196     guarantee(_cfg_printer_output != NULL, "CFG printer output not initialized");
 197     return _cfg_printer_output;
 198   }
 199 #endif // PRODUCT
 200 
 201   // error handling
 202   void bailout(const char* msg);
 203   bool bailed_out() const                        { return _bailout_msg != NULL; }
 204   const char* bailout_msg() const                { return _bailout_msg; }
 205 
 206   static int desired_max_code_buffer_size() {
 207     return (int)NMethodSizeLimit;  // default 64K
 208   }
 209   static int desired_max_constant_size() {
 210     return desired_max_code_buffer_size() / 10;
 211   }
 212 
 213   static bool setup_code_buffer(CodeBuffer* cb, int call_stub_estimate);
 214 
 215   // timers
 216   static void print_timers();
 217 
 218 #ifndef PRODUCT
 219   // debugging support.
 220   // produces a file named c1compileonly in the current directory with
 221   // directives to compile only the current method and it's inlines.
 222   // The file can be passed to the command line option -XX:Flags=<filename>
 223   void compile_only_this_method();
 224   void compile_only_this_scope(outputStream* st, IRScope* scope);
 225   void exclude_this_method();
 226 #endif // PRODUCT
 227 
 228   bool is_profiling() {
 229     return env()->comp_level() == CompLevel_full_profile ||
 230            env()->comp_level() == CompLevel_limited_profile;
 231   }
 232   bool count_invocations() { return is_profiling(); }
 233   bool count_backedges()   { return is_profiling(); }
 234 
 235   // Helpers for generation of profile information
 236   bool profile_branches() {
 237     return env()->comp_level() == CompLevel_full_profile &&
 238       C1UpdateMethodData && C1ProfileBranches;
 239   }
 240   bool profile_calls() {
 241     return env()->comp_level() == CompLevel_full_profile &&
 242       C1UpdateMethodData && C1ProfileCalls;
 243   }
 244   bool profile_inlined_calls() {
 245     return profile_calls() && C1ProfileInlinedCalls;
 246   }
 247   bool profile_checkcasts() {
 248     return env()->comp_level() == CompLevel_full_profile &&
 249       C1UpdateMethodData && C1ProfileCheckcasts;
 250   }
 251   bool profile_parameters() {
 252     return env()->comp_level() == CompLevel_full_profile &&
 253       C1UpdateMethodData && MethodData::profile_parameters();
 254   }
 255   bool profile_arguments() {
 256     return env()->comp_level() == CompLevel_full_profile &&
 257       C1UpdateMethodData && MethodData::profile_arguments();
 258   }
 259   bool profile_return() {
 260     return env()->comp_level() == CompLevel_full_profile &&
 261       C1UpdateMethodData && MethodData::profile_return();
 262   }
 263   bool age_code() const {
 264     return _method->profile_aging();
 265   }
 266 
 267   // will compilation make optimistic assumptions that might lead to
 268   // deoptimization and that the runtime will account for?
 269   bool is_optimistic() const                             {
 270     return !TieredCompilation &&
 271       (RangeCheckElimination || UseLoopInvariantCodeMotion) &&
 272       method()->method_data()->trap_count(Deoptimization::Reason_none) == 0;
 273   }
 274 
 275   ciKlass* cha_exact_type(ciType* type);
 276 
 277   // Dump inlining replay data to the stream.
 278   void dump_inline_data(outputStream* out) { /* do nothing now */ }
 279 
 280   // How much stack space would the interpreter need in case of a
 281   // deoptimization (worst case)
 282   void update_interpreter_frame_size(int size) {
 283     if (_interpreter_frame_size < size) {
 284       _interpreter_frame_size = size;
 285     }
 286   }
 287 
 288   int interpreter_frame_size() const {
 289     return _interpreter_frame_size;
 290   }
 291 };
 292 
 293 
 294 // Macro definitions for unified bailout-support
 295 // The methods bailout() and bailed_out() are present in all classes
 296 // that might bailout, but forward all calls to Compilation
 297 #define BAILOUT(msg)               { bailout(msg); return;              }
 298 #define BAILOUT_(msg, res)         { bailout(msg); return res;          }
 299 
 300 #define CHECK_BAILOUT()            { if (bailed_out()) return;          }
 301 #define CHECK_BAILOUT_(res)        { if (bailed_out()) return res;      }
 302 
 303 
 304 class InstructionMark: public StackObj {
 305  private:
 306   Compilation* _compilation;
 307   Instruction*  _previous;
 308 
 309  public:
 310   InstructionMark(Compilation* compilation, Instruction* instr) {
 311     _compilation = compilation;
 312     _previous = _compilation->set_current_instruction(instr);
 313   }
 314   ~InstructionMark() {
 315     _compilation->set_current_instruction(_previous);
 316   }
 317 };
 318 
 319 
 320 //----------------------------------------------------------------------
 321 // Base class for objects allocated by the compiler in the compilation arena
 322 class CompilationResourceObj ALLOCATION_SUPER_CLASS_SPEC {
 323  public:
 324   void* operator new(size_t size) throw() { return Compilation::current()->arena()->Amalloc(size); }
 325   void* operator new(size_t size, Arena* arena) throw() {
 326     return arena->Amalloc(size);
 327   }
 328   void  operator delete(void* p) {} // nothing to do
 329 };
 330 
 331 
 332 //----------------------------------------------------------------------
 333 // Class for aggregating exception handler information.
 334 
 335 // Effectively extends XHandlers class with PC offset of
 336 // potentially exception-throwing instruction.
 337 // This class is used at the end of the compilation to build the
 338 // ExceptionHandlerTable.
 339 class ExceptionInfo: public CompilationResourceObj {
 340  private:
 341   int             _pco;                // PC of potentially exception-throwing instruction
 342   XHandlers*      _exception_handlers; // flat list of exception handlers covering this PC
 343 
 344  public:
 345   ExceptionInfo(int pco, XHandlers* exception_handlers)
 346     : _pco(pco)
 347     , _exception_handlers(exception_handlers)
 348   { }
 349 
 350   int pco()                                      { return _pco; }
 351   XHandlers* exception_handlers()                { return _exception_handlers; }
 352 };
 353 
 354 #endif // SHARE_C1_C1_COMPILATION_HPP