jdk8-mips64-public/hotspot: src/share/vm/ci/ciEnv.hpp@2c6ef90f030a (annotated)

src/share/vm/ci/ciEnv.hpp@2c6ef90f030a (annotated)

src/share/vm/ci/ciEnv.hpp

Mon, 07 Jul 2014 10:12:40 +0200

author: stefank
date: Mon, 07 Jul 2014 10:12:40 +0200
changeset 6992: 2c6ef90f030a
parent 6429: 606acabe7b5c
child 7535: 7ae4e26cb1e0
child 9942: eddd586d1a4c
permissions: -rw-r--r--

8049421: G1 Class Unloading after completing a concurrent mark cycle
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
Contributed-by: stefan.karlsson@oracle.com, mikael.gerdin@oracle.com

 /*
  * 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_CI_CIENV_HPP
 #define SHARE_VM_CI_CIENV_HPP
 #include "ci/ciClassList.hpp"
 #include "ci/ciObjectFactory.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "code/debugInfoRec.hpp"
 #include "code/dependencies.hpp"
 #include "code/exceptionHandlerTable.hpp"
 #include "compiler/oopMap.hpp"
 #include "runtime/thread.hpp"
 class CompileTask;
 // ciEnv
 //
 // This class is the top level broker for requests from the compiler
 // to the VM.
 class ciEnv : StackObj {
   CI_PACKAGE_ACCESS_TO
   friend class CompileBroker;
   friend class Dependencies;  // for get_object, during logging
 private:
   Arena*           _arena;       // Alias for _ciEnv_arena except in init_shared_objects()
   Arena            _ciEnv_arena;
   int              _system_dictionary_modification_counter;
   ciObjectFactory* _factory;
   OopRecorder*     _oop_recorder;
   DebugInformationRecorder* _debug_info;
   Dependencies*    _dependencies;
   const char*      _failure_reason;
   int              _compilable;
   bool             _break_at_compile;
   int              _num_inlined_bytecodes;
   CompileTask*     _task;           // faster access to CompilerThread::task
   CompileLog*      _log;            // faster access to CompilerThread::log
   void*            _compiler_data;  // compiler-specific stuff, if any
   char* _name_buffer;
   int   _name_buffer_len;
   // Cache Jvmti state
   bool  _jvmti_can_hotswap_or_post_breakpoint;
   bool  _jvmti_can_access_local_variables;
   bool  _jvmti_can_post_on_exceptions;
   // Cache DTrace flags
   bool  _dtrace_extended_probes;
   bool  _dtrace_monitor_probes;
   bool  _dtrace_method_probes;
   bool  _dtrace_alloc_probes;
   // Distinguished instances of certain ciObjects..
   static ciObject*              _null_object_instance;
 #define WK_KLASS_DECL(name, ignore_s, ignore_o) static ciInstanceKlass* _##name;
   WK_KLASSES_DO(WK_KLASS_DECL)
 #undef WK_KLASS_DECL
   static ciSymbol*        _unloaded_cisymbol;
   static ciInstanceKlass* _unloaded_ciinstance_klass;
   static ciObjArrayKlass* _unloaded_ciobjarrayklass;
   static jobject _ArrayIndexOutOfBoundsException_handle;
   static jobject _ArrayStoreException_handle;
   static jobject _ClassCastException_handle;
   ciInstance* _NullPointerException_instance;
   ciInstance* _ArithmeticException_instance;
   ciInstance* _ArrayIndexOutOfBoundsException_instance;
   ciInstance* _ArrayStoreException_instance;
   ciInstance* _ClassCastException_instance;
   ciInstance* _the_null_string;      // The Java string "null"
   ciInstance* _the_min_jint_string; // The Java string "-2147483648"
   // Look up a klass by name from a particular class loader (the accessor's).
   // If require_local, result must be defined in that class loader, or NULL.
   // If !require_local, a result from remote class loader may be reported,
   // if sufficient class loader constraints exist such that initiating
   // a class loading request from the given loader is bound to return
   // the class defined in the remote loader (or throw an error).
   //
   // Return an unloaded klass if !require_local and no class at all is found.
   //
   // The CI treats a klass as loaded if it is consistently defined in
   // another loader, even if it hasn't yet been loaded in all loaders
   // that could potentially see it via delegation.
   ciKlass* get_klass_by_name(ciKlass* accessing_klass,
                              ciSymbol* klass_name,
                              bool require_local);
   // Constant pool access.
   ciKlass*   get_klass_by_index(constantPoolHandle cpool,
                                 int klass_index,
                                 bool& is_accessible,
                                 ciInstanceKlass* loading_klass);
   ciConstant get_constant_by_index(constantPoolHandle cpool,
                                    int pool_index, int cache_index,
                                    ciInstanceKlass* accessor);
   ciField*   get_field_by_index(ciInstanceKlass* loading_klass,
                                 int field_index);
   ciMethod*  get_method_by_index(constantPoolHandle cpool,
                                  int method_index, Bytecodes::Code bc,
                                  ciInstanceKlass* loading_klass);
   // Implementation methods for loading and constant pool access.
   ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass,
                                   constantPoolHandle cpool,
                                   ciSymbol* klass_name,
                                   bool require_local);
   ciKlass*   get_klass_by_index_impl(constantPoolHandle cpool,
                                      int klass_index,
                                      bool& is_accessible,
                                      ciInstanceKlass* loading_klass);
   ciConstant get_constant_by_index_impl(constantPoolHandle cpool,
                                         int pool_index, int cache_index,
                                         ciInstanceKlass* loading_klass);
   ciField*   get_field_by_index_impl(ciInstanceKlass* loading_klass,
                                      int field_index);
   ciMethod*  get_method_by_index_impl(constantPoolHandle cpool,
                                       int method_index, Bytecodes::Code bc,
                                       ciInstanceKlass* loading_klass);
   // Helper methods
   bool       check_klass_accessibility(ciKlass* accessing_klass,
                                       Klass* resolved_klass);
   Method*    lookup_method(InstanceKlass*  accessor,
                            InstanceKlass*  holder,
                            Symbol*         name,
                            Symbol*         sig,
                            Bytecodes::Code bc);
   // Get a ciObject from the object factory.  Ensures uniqueness
   // of ciObjects.
   ciObject* get_object(oop o) {
     if (o == NULL) {
       return _null_object_instance;
     } else {
       return _factory->get(o);
     }
   }
   ciSymbol* get_symbol(Symbol* o) {
     if (o == NULL) {
       ShouldNotReachHere();
       return NULL;
     } else {
       return _factory->get_symbol(o);
     }
   }
   ciMetadata* get_metadata(Metadata* o) {
     if (o == NULL) {
       return NULL;
     } else {
       return _factory->get_metadata(o);
     }
   }
   void ensure_metadata_alive(ciMetadata* m) {
     _factory->ensure_metadata_alive(m);
   }
   ciInstance* get_instance(oop o) {
     if (o == NULL) return NULL;
     return get_object(o)->as_instance();
   }
   ciObjArrayKlass* get_obj_array_klass(Klass* o) {
     if (o == NULL) return NULL;
     return get_metadata(o)->as_obj_array_klass();
   }
   ciTypeArrayKlass* get_type_array_klass(Klass* o) {
     if (o == NULL) return NULL;
     return get_metadata(o)->as_type_array_klass();
   }
   ciKlass* get_klass(Klass* o) {
     if (o == NULL) return NULL;
     return get_metadata(o)->as_klass();
   }
   ciInstanceKlass* get_instance_klass(Klass* o) {
     if (o == NULL) return NULL;
     return get_metadata(o)->as_instance_klass();
   }
   ciMethod* get_method(Method* o) {
     if (o == NULL) return NULL;
     return get_metadata(o)->as_method();
   }
   ciMethodData* get_method_data(MethodData* o) {
     if (o == NULL) return NULL;
     return get_metadata(o)->as_method_data();
   }
   ciMethod* get_method_from_handle(Method* method);
   ciInstance* get_or_create_exception(jobject& handle, Symbol* name);
   // Get a ciMethod representing either an unfound method or
   // a method with an unloaded holder.  Ensures uniqueness of
   // the result.
   ciMethod* get_unloaded_method(ciInstanceKlass* holder,
                                 ciSymbol*        name,
                                 ciSymbol*        signature,
                                 ciInstanceKlass* accessor) {
     return _factory->get_unloaded_method(holder, name, signature, accessor);
   }
   // Get a ciKlass representing an unloaded klass.
   // Ensures uniqueness of the result.
   ciKlass* get_unloaded_klass(ciKlass*  accessing_klass,
                               ciSymbol* name) {
     return _factory->get_unloaded_klass(accessing_klass, name, true);
   }
   // Get a ciKlass representing an unloaded klass mirror.
   // Result is not necessarily unique, but will be unloaded.
   ciInstance* get_unloaded_klass_mirror(ciKlass* type) {
     return _factory->get_unloaded_klass_mirror(type);
   }
   // Get a ciInstance representing an unresolved method handle constant.
   ciInstance* get_unloaded_method_handle_constant(ciKlass*  holder,
                                                   ciSymbol* name,
                                                   ciSymbol* signature,
                                                   int       ref_kind) {
     return _factory->get_unloaded_method_handle_constant(holder, name, signature, ref_kind);
   }
   // Get a ciInstance representing an unresolved method type constant.
   ciInstance* get_unloaded_method_type_constant(ciSymbol* signature) {
     return _factory->get_unloaded_method_type_constant(signature);
   }
   // See if we already have an unloaded klass for the given name
   // or return NULL if not.
   ciKlass *check_get_unloaded_klass(ciKlass*  accessing_klass, ciSymbol* name) {
     return _factory->get_unloaded_klass(accessing_klass, name, false);
   }
   // Get a ciReturnAddress corresponding to the given bci.
   // Ensures uniqueness of the result.
   ciReturnAddress* get_return_address(int bci) {
     return _factory->get_return_address(bci);
   }
   // Get a ciMethodData representing the methodData for a method
   // with none.
   ciMethodData* get_empty_methodData() {
     return _factory->get_empty_methodData();
   }
   // General utility : get a buffer of some required length.
   // Used in symbol creation.
   char* name_buffer(int req_len);
   // Is this thread currently in the VM state?
   static bool is_in_vm();
   // Helper routine for determining the validity of a compilation with
   // respect to method dependencies (e.g. concurrent class loading).
   void validate_compile_task_dependencies(ciMethod* target);
 public:
   enum {
     MethodCompilable,
     MethodCompilable_not_at_tier,
     MethodCompilable_never
   };
   ciEnv(CompileTask* task, int system_dictionary_modification_counter);
   // Used only during initialization of the ci
   ciEnv(Arena* arena);
   ~ciEnv();
   OopRecorder* oop_recorder() { return _oop_recorder; }
   void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; }
   DebugInformationRecorder* debug_info() { return _debug_info; }
   void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; }
   Dependencies* dependencies() { return _dependencies; }
   void set_dependencies(Dependencies* d) { _dependencies = d; }
   // This is true if the compilation is not going to produce code.
   // (It is reasonable to retry failed compilations.)
   bool failing() { return _failure_reason != NULL; }
   // Reason this compilation is failing, such as "too many basic blocks".
   const char* failure_reason() { return _failure_reason; }
   // Return state of appropriate compilability
   int compilable() { return _compilable; }
   const char* retry_message() const {
     switch (_compilable) {
       case ciEnv::MethodCompilable_not_at_tier:
         return "retry at different tier";
       case ciEnv::MethodCompilable_never:
         return "not retryable";
       case ciEnv::MethodCompilable:
         return NULL;
       default:
         ShouldNotReachHere();
         return NULL;
     }
   }
   bool break_at_compile() { return _break_at_compile; }
   void set_break_at_compile(bool z) { _break_at_compile = z; }
   // Cache Jvmti state
   void  cache_jvmti_state();
   bool  jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint; }
   bool  jvmti_can_access_local_variables()     const { return _jvmti_can_access_local_variables; }
   bool  jvmti_can_post_on_exceptions()         const { return _jvmti_can_post_on_exceptions; }
   // Cache DTrace flags
   void  cache_dtrace_flags();
   bool  dtrace_extended_probes() const { return _dtrace_extended_probes; }
   bool  dtrace_monitor_probes()  const { return _dtrace_monitor_probes; }
   bool  dtrace_method_probes()   const { return _dtrace_method_probes; }
   bool  dtrace_alloc_probes()    const { return _dtrace_alloc_probes; }
   // The compiler task which has created this env.
   // May be useful to find out compile_id, comp_level, etc.
   CompileTask* task() { return _task; }
   // Handy forwards to the task:
   int comp_level();   // task()->comp_level()
   uint compile_id();  // task()->compile_id()
   // Register the result of a compilation.
   void register_method(ciMethod*                 target,
                        int                       entry_bci,
                        CodeOffsets*              offsets,
                        int                       orig_pc_offset,
                        CodeBuffer*               code_buffer,
                        int                       frame_words,
                        OopMapSet*                oop_map_set,
                        ExceptionHandlerTable*    handler_table,
                        ImplicitExceptionTable*   inc_table,
                        AbstractCompiler*         compiler,
                        int                       comp_level,
                        bool                      has_unsafe_access,
                        bool                      has_wide_vectors,
                        RTMState                  rtm_state = NoRTM);
   // Access to certain well known ciObjects.
 #define WK_KLASS_FUNC(name, ignore_s, ignore_o) \
   ciInstanceKlass* name() { \
     return _##name;\
   }
   WK_KLASSES_DO(WK_KLASS_FUNC)
 #undef WK_KLASS_FUNC
   ciInstance* NullPointerException_instance() {
     assert(_NullPointerException_instance != NULL, "initialization problem");
     return _NullPointerException_instance;
   }
   ciInstance* ArithmeticException_instance() {
     assert(_ArithmeticException_instance != NULL, "initialization problem");
     return _ArithmeticException_instance;
   }
   // Lazy constructors:
   ciInstance* ArrayIndexOutOfBoundsException_instance();
   ciInstance* ArrayStoreException_instance();
   ciInstance* ClassCastException_instance();
   ciInstance* the_null_string();
   ciInstance* the_min_jint_string();
   static ciSymbol* unloaded_cisymbol() {
     return _unloaded_cisymbol;
   }
   static ciObjArrayKlass* unloaded_ciobjarrayklass() {
     return _unloaded_ciobjarrayklass;
   }
   static ciInstanceKlass* unloaded_ciinstance_klass() {
     return _unloaded_ciinstance_klass;
   }
   ciInstance* unloaded_ciinstance();
   ciKlass*  find_system_klass(ciSymbol* klass_name);
   // Note:  To find a class from its name string, use ciSymbol::make,
   // but consider adding to vmSymbols.hpp instead.
   // converts the ciKlass* representing the holder of a method into a
   // ciInstanceKlass*.  This is needed since the holder of a method in
   // the bytecodes could be an array type.  Basically this converts
   // array types into java/lang/Object and other types stay as they are.
   static ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass);
   // Return the machine-level offset of o, which must be an element of a.
   // This may be used to form constant-loading expressions in lieu of simpler encodings.
   int       array_element_offset_in_bytes(ciArray* a, ciObject* o);
   // Access to the compile-lifetime allocation arena.
   Arena*    arena() { return _arena; }
   // What is the current compilation environment?
   static ciEnv* current() { return CompilerThread::current()->env(); }
   // Overload with current thread argument
   static ciEnv* current(CompilerThread *thread) { return thread->env(); }
   // Per-compiler data.  (Used by C2 to publish the Compile* pointer.)
   void* compiler_data() { return _compiler_data; }
   void set_compiler_data(void* x) { _compiler_data = x; }
   // Notice that a method has been inlined in the current compile;
   // used only for statistics.
   void notice_inlined_method(ciMethod* method);
   // Total number of bytecodes in inlined methods in this compile
   int num_inlined_bytecodes() const;
   // Output stream for logging compilation info.
   CompileLog* log() { return _log; }
   void set_log(CompileLog* log) { _log = log; }
   // Check for changes to the system dictionary during compilation
   bool system_dictionary_modification_counter_changed();
   void record_failure(const char* reason);
   void record_method_not_compilable(const char* reason, bool all_tiers = true);
   void record_out_of_memory_failure();
   // RedefineClasses support
   void metadata_do(void f(Metadata*)) { _factory->metadata_do(f); }
   // Dump the compilation replay data for the ciEnv to the stream.
   void dump_replay_data(int compile_id);
   void dump_inline_data(int compile_id);
   void dump_replay_data(outputStream* out);
   void dump_replay_data_unsafe(outputStream* out);
   void dump_compile_data(outputStream* out);
 };
 #endif // SHARE_VM_CI_CIENV_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/ci/ciEnv.hpp@2c6ef90f030a (annotated)

src/share/vm/ci/ciEnv.hpp