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 /*

  * Copyright (c) 1999, 2019, 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

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 #ifndef SHARE_VM_COMPILER_COMPILEBROKER_HPP

 #define SHARE_VM_COMPILER_COMPILEBROKER_HPP

 #include "ci/compilerInterface.hpp"

 #include "compiler/abstractCompiler.hpp"

 #include "runtime/perfData.hpp"

 class nmethod;

 class nmethodLocker;

 // CompileTask

 //

 // An entry in the compile queue.  It represents a pending or current

 // compilation.

 class CompileTask : public CHeapObj<mtCompiler> {

   friend class VMStructs;

  private:

   static CompileTask* _task_free_list;

 #ifdef ASSERT

   static int          _num_allocated_tasks;

 #endif

   Monitor*     _lock;

   uint         _compile_id;

   Method*      _method;

   jobject      _method_holder;

   int          _osr_bci;

   bool         _is_complete;

   bool         _is_success;

   bool         _is_blocking;

   int          _comp_level;

   int          _num_inlined_bytecodes;

   nmethodLocker* _code_handle;  // holder of eventual result

   CompileTask* _next, *_prev;

   bool         _is_free;

   // Fields used for logging why the compilation was initiated:

   jlong        _time_queued;  // in units of os::elapsed_counter()

   Method*      _hot_method;   // which method actually triggered this task

   jobject      _hot_method_holder;

   int          _hot_count;    // information about its invocation counter

   const char*  _comment;      // more info about the task

   const char*  _failure_reason;

  public:

   CompileTask() {

     _lock = new Monitor(Mutex::nonleaf+2, "CompileTaskLock");

   }

   void initialize(int compile_id, methodHandle method, int osr_bci, int comp_level,

                   methodHandle hot_method, int hot_count, const char* comment,

                   bool is_blocking);

   static CompileTask* allocate();

   static void         free(CompileTask* task);

   int          compile_id() const                { return _compile_id; }

   Method*      method() const                    { return _method; }

   int          osr_bci() const                   { return _osr_bci; }

   bool         is_complete() const               { return _is_complete; }

   bool         is_blocking() const               { return _is_blocking; }

   bool         is_success() const                { return _is_success; }

   nmethodLocker* code_handle() const             { return _code_handle; }

   void         set_code_handle(nmethodLocker* l) { _code_handle = l; }

   nmethod*     code() const;                     // _code_handle->code()

   void         set_code(nmethod* nm);            // _code_handle->set_code(nm)

   Monitor*     lock() const                      { return _lock; }

   void         mark_complete()                   { _is_complete = true; }

   void         mark_success()                    { _is_success = true; }

   int          comp_level()                      { return _comp_level;}

   void         set_comp_level(int comp_level)    { _comp_level = comp_level;}

   int          num_inlined_bytecodes() const     { return _num_inlined_bytecodes; }

   void         set_num_inlined_bytecodes(int n)  { _num_inlined_bytecodes = n; }

   CompileTask* next() const                      { return _next; }

   void         set_next(CompileTask* next)       { _next = next; }

   CompileTask* prev() const                      { return _prev; }

   void         set_prev(CompileTask* prev)       { _prev = prev; }

   bool         is_free() const                   { return _is_free; }

   void         set_is_free(bool val)             { _is_free = val; }

 private:

   static void  print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,

                                       bool is_osr_method = false, int osr_bci = -1, bool is_blocking = false,

                                       const char* msg = NULL, bool short_form = false);

 public:

   void         print_compilation(outputStream* st = tty, const char* msg = NULL, bool short_form = false);

   static void  print_compilation(outputStream* st, const nmethod* nm, const char* msg = NULL, bool short_form = false) {

     print_compilation_impl(st, nm->method(), nm->compile_id(), nm->comp_level(),

                            nm->is_osr_method(), nm->is_osr_method() ? nm->osr_entry_bci() : -1, /*is_blocking*/ false,

                            msg, short_form);

   }

   static void  print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg = NULL);

   static void  print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {

     print_inlining(tty, method, inline_level, bci, msg);

   }

   // Redefine Classes support

   void mark_on_stack();

   static void  print_inline_indent(int inline_level, outputStream* st = tty);

   void         print();

   void         print_line();

   void         print_line_on_error(outputStream* st, char* buf, int buflen);

   void         log_task(xmlStream* log);

   void         log_task_queued();

   void         log_task_start(CompileLog* log);

   void         log_task_done(CompileLog* log);

   void         set_failure_reason(const char* reason) {

     _failure_reason = reason;

   }

 };

 // CompilerCounters

 //

 // Per Compiler Performance Counters.

 //

 class CompilerCounters : public CHeapObj<mtCompiler> {

   public:

     enum {

       cmname_buffer_length = 160

     };

   private:

     char _current_method[cmname_buffer_length];

     PerfStringVariable* _perf_current_method;

     int  _compile_type;

     PerfVariable* _perf_compile_type;

     PerfCounter* _perf_time;

     PerfCounter* _perf_compiles;

   public:

     CompilerCounters(const char* name, int instance, TRAPS);

     // these methods should be called in a thread safe context

     void set_current_method(const char* method) {

       strncpy(_current_method, method, (size_t)cmname_buffer_length);

       if (UsePerfData) _perf_current_method->set_value(method);

     }

     char* current_method()                  { return _current_method; }

     void set_compile_type(int compile_type) {

       _compile_type = compile_type;

       if (UsePerfData) _perf_compile_type->set_value((jlong)compile_type);

     }

     int compile_type()                       { return _compile_type; }

     PerfCounter* time_counter()              { return _perf_time; }

     PerfCounter* compile_counter()           { return _perf_compiles; }

 };

 // CompileQueue

 //

 // A list of CompileTasks.

 class CompileQueue : public CHeapObj<mtCompiler> {

  private:

   const char* _name;

   Monitor*    _lock;

   CompileTask* _first;

   CompileTask* _last;

   CompileTask* _first_stale;

   int _size;

   void purge_stale_tasks();

  public:

   CompileQueue(const char* name, Monitor* lock) {

     _name = name;

     _lock = lock;

     _first = NULL;

     _last = NULL;

     _size = 0;

     _first_stale = NULL;

   }

   const char*  name() const                      { return _name; }

   Monitor*     lock() const                      { return _lock; }

   void         add(CompileTask* task);

   void         remove(CompileTask* task);

   void         remove_and_mark_stale(CompileTask* task);

   CompileTask* first()                           { return _first; }

   CompileTask* last()                            { return _last;  }

   CompileTask* get();

   bool         is_empty() const                  { return _first == NULL; }

   int          size()     const                  { return _size;          }

   // Redefine Classes support

   void mark_on_stack();

   void free_all();

   NOT_PRODUCT (void print();)

   ~CompileQueue() {

     assert (is_empty(), " Compile Queue must be empty");

   }

 };

 // CompileTaskWrapper

 //

 // Assign this task to the current thread.  Deallocate the task

 // when the compilation is complete.

 class CompileTaskWrapper : StackObj {

 public:

   CompileTaskWrapper(CompileTask* task);

   ~CompileTaskWrapper();

 };

 // Compilation

 //

 // The broker for all compilation requests.

 class CompileBroker: AllStatic {

  friend class Threads;

   friend class CompileTaskWrapper;

  public:

   enum {

     name_buffer_length = 100

   };

   // Compile type Information for print_last_compile() and CompilerCounters

   enum { no_compile, normal_compile, osr_compile, native_compile };

   static int assign_compile_id (methodHandle method, int osr_bci);

  private:

   static bool _initialized;

   static volatile bool _should_block;

   // This flag can be used to stop compilation or turn it back on

   static volatile jint _should_compile_new_jobs;

   // The installed compiler(s)

   static AbstractCompiler* _compilers[2];

   // These counters are used for assigning id's to each compilation

   static volatile jint _compilation_id;

   static volatile jint _osr_compilation_id;

   static int  _last_compile_type;

   static int  _last_compile_level;

   static char _last_method_compiled[name_buffer_length];

   static CompileQueue* _c2_compile_queue;

   static CompileQueue* _c1_compile_queue;

   static GrowableArray<CompilerThread*>* _compiler_threads;

   // performance counters

   static PerfCounter* _perf_total_compilation;

   static PerfCounter* _perf_native_compilation;

   static PerfCounter* _perf_osr_compilation;

   static PerfCounter* _perf_standard_compilation;

   static PerfCounter* _perf_total_bailout_count;

   static PerfCounter* _perf_total_invalidated_count;

   static PerfCounter* _perf_total_compile_count;

   static PerfCounter* _perf_total_native_compile_count;

   static PerfCounter* _perf_total_osr_compile_count;

   static PerfCounter* _perf_total_standard_compile_count;

   static PerfCounter* _perf_sum_osr_bytes_compiled;

   static PerfCounter* _perf_sum_standard_bytes_compiled;

   static PerfCounter* _perf_sum_nmethod_size;

   static PerfCounter* _perf_sum_nmethod_code_size;

   static PerfStringVariable* _perf_last_method;

   static PerfStringVariable* _perf_last_failed_method;

   static PerfStringVariable* _perf_last_invalidated_method;

   static PerfVariable*       _perf_last_compile_type;

   static PerfVariable*       _perf_last_compile_size;

   static PerfVariable*       _perf_last_failed_type;

   static PerfVariable*       _perf_last_invalidated_type;

   // Timers and counters for generating statistics

   static elapsedTimer _t_total_compilation;

   static elapsedTimer _t_osr_compilation;

   static elapsedTimer _t_standard_compilation;

   static int _total_compile_count;

   static int _total_bailout_count;

   static int _total_invalidated_count;

   static int _total_native_compile_count;

   static int _total_osr_compile_count;

   static int _total_standard_compile_count;

   static int _sum_osr_bytes_compiled;

   static int _sum_standard_bytes_compiled;

   static int _sum_nmethod_size;

   static int _sum_nmethod_code_size;

   static long _peak_compilation_time;

   static volatile jint _print_compilation_warning;

   static CompilerThread* make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, AbstractCompiler* comp, TRAPS);

   static void init_compiler_threads(int c1_compiler_count, int c2_compiler_count);

   static bool compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level);

   static bool is_compile_blocking      ();

   static void preload_classes          (methodHandle method, TRAPS);

   static CompileTask* create_compile_task(CompileQueue* queue,

                                           int           compile_id,

                                           methodHandle  method,

                                           int           osr_bci,

                                           int           comp_level,

                                           methodHandle  hot_method,

                                           int           hot_count,

                                           const char*   comment,

                                           bool          blocking);

   static void wait_for_completion(CompileTask* task);

   static void invoke_compiler_on_method(CompileTask* task);

   static void set_last_compile(CompilerThread *thread, methodHandle method, bool is_osr, int comp_level);

   static void push_jni_handle_block();

   static void pop_jni_handle_block();

   static bool check_break_at(methodHandle method, int compile_id, bool is_osr);

   static void collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task);

   static void compile_method_base(methodHandle method,

                                   int osr_bci,

                                   int comp_level,

                                   methodHandle hot_method,

                                   int hot_count,

                                   const char* comment,

                                   Thread* thread);

   static CompileQueue* compile_queue(int comp_level) {

     if (is_c2_compile(comp_level)) return _c2_compile_queue;

     if (is_c1_compile(comp_level)) return _c1_compile_queue;

     return NULL;

   }

   static bool init_compiler_runtime();

   static void shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread);

  public:

   enum {

     // The entry bci used for non-OSR compilations.

     standard_entry_bci = InvocationEntryBci

   };

   static AbstractCompiler* compiler(int comp_level) {

     if (is_c2_compile(comp_level)) return _compilers[1]; // C2

     if (is_c1_compile(comp_level)) return _compilers[0]; // C1

     return NULL;

   }

   static bool compilation_is_complete(methodHandle method, int osr_bci, int comp_level);

   static bool compilation_is_in_queue(methodHandle method);

   static int queue_size(int comp_level) {

     CompileQueue *q = compile_queue(comp_level);

     return q != NULL ? q->size() : 0;

   }

   static void compilation_init();

   static void init_compiler_thread_log();

   static nmethod* compile_method(methodHandle method,

                                  int osr_bci,

                                  int comp_level,

                                  methodHandle hot_method,

                                  int hot_count,

                                  const char* comment, Thread* thread);

   static void compiler_thread_loop();

   static uint get_compilation_id() { return _compilation_id; }

   // Set _should_block.

   // Call this from the VM, with Threads_lock held and a safepoint requested.

   static void set_should_block();

   // Call this from the compiler at convenient points, to poll for _should_block.

   static void maybe_block();

   enum {

     // Flags for toggling compiler activity

     stop_compilation    = 0,

     run_compilation     = 1,

     shutdown_compilaton = 2

   };

   static bool should_compile_new_jobs() { return UseCompiler && (_should_compile_new_jobs == run_compilation); }

   static bool set_should_compile_new_jobs(jint new_state) {

     // Return success if the current caller set it

     jint old = Atomic::cmpxchg(new_state, &_should_compile_new_jobs, 1-new_state);

     return (old == (1-new_state));

   }

   static void disable_compilation_forever() {

     UseCompiler               = false;

     AlwaysCompileLoopMethods  = false;

     Atomic::xchg(shutdown_compilaton, &_should_compile_new_jobs);

   }

   static bool is_compilation_disabled_forever() {

     return _should_compile_new_jobs == shutdown_compilaton;

   }

   static void handle_full_code_cache();

   // Ensures that warning is only printed once.

   static bool should_print_compiler_warning() {

     jint old = Atomic::cmpxchg(1, &_print_compilation_warning, 0);

     return old == 0;

   }

   // Return total compilation ticks

   static jlong total_compilation_ticks() {

     return _perf_total_compilation != NULL ? _perf_total_compilation->get_value() : 0;

   }

   // Redefine Classes support

   static void mark_on_stack();

   // Print a detailed accounting of compilation time

   static void print_times();

   // Debugging output for failure

   static void print_last_compile();

   static void print_compiler_threads_on(outputStream* st);

   // compiler name for debugging

   static const char* compiler_name(int comp_level);

   static int get_total_compile_count() {          return _total_compile_count; }

   static int get_total_bailout_count() {          return _total_bailout_count; }

   static int get_total_invalidated_count() {      return _total_invalidated_count; }

   static int get_total_native_compile_count() {   return _total_native_compile_count; }

   static int get_total_osr_compile_count() {      return _total_osr_compile_count; }

   static int get_total_standard_compile_count() { return _total_standard_compile_count; }

   static int get_sum_osr_bytes_compiled() {       return _sum_osr_bytes_compiled; }

   static int get_sum_standard_bytes_compiled() {  return _sum_standard_bytes_compiled; }

   static int get_sum_nmethod_size() {             return _sum_nmethod_size;}

   static int get_sum_nmethod_code_size() {        return _sum_nmethod_code_size; }

   static long get_peak_compilation_time() {       return _peak_compilation_time; }

   static long get_total_compilation_time() {      return _t_total_compilation.milliseconds(); }

 };

 #endif // SHARE_VM_COMPILER_COMPILEBROKER_HPP