src/hotspot/share/runtime/thread.hpp

rev 60137 : 8227745: Enable Escape Analysis for Better Performance in the Presence of JVMTI Agents
Reviewed-by: mdoerr, goetz
rev 60138 : 8227745: delta webrev.5 -> webrev.6

*** 79,89 ****
  class vframe;
  class javaVFrame;
  
  class DeoptResourceMark;
  class JvmtiDeferredUpdates;
- class jvmtiDeferredLocalVariableSet;
  
  class ThreadClosure;
  class ICRefillVerifier;
  class IdealGraphPrinter;
  
--- 79,88 ----
*** 290,300 ****
  
      _has_async_exception    = 0x00000001U, // there is a pending async exception
      _critical_native_unlock = 0x00000002U, // Must call back to unlock JNI critical lock
  
      _trace_flag             = 0x00000004U, // call tracing backend
!     _ea_obj_deopt           = 0x00000008U  // suspend for object reallocation and relocking for JVMTI agent
    };
  
    // various suspension related flags - atomically updated
    // overloaded for async exception checking in check_special_condition_for_native_trans.
    volatile uint32_t _suspend_flags;
--- 289,299 ----
  
      _has_async_exception    = 0x00000001U, // there is a pending async exception
      _critical_native_unlock = 0x00000002U, // Must call back to unlock JNI critical lock
  
      _trace_flag             = 0x00000004U, // call tracing backend
!     _obj_deopt              = 0x00000008U  // suspend for object reallocation and relocking for JVMTI agent
    };
  
    // various suspension related flags - atomically updated
    // overloaded for async exception checking in check_special_condition_for_native_trans.
    volatile uint32_t _suspend_flags;
*** 541,552 ****
    inline void clear_critical_native_unlock();
  
    inline void set_trace_flag();
    inline void clear_trace_flag();
  
!   inline void set_ea_obj_deopt_flag();
!   inline void clear_ea_obj_deopt_flag();
  
    // Support for Unhandled Oop detection
    // Add the field for both, fastdebug and debug, builds to keep
    // Thread's fields layout the same.
    // Note: CHECK_UNHANDLED_OOPS is defined only for fastdebug build.
--- 540,551 ----
    inline void clear_critical_native_unlock();
  
    inline void set_trace_flag();
    inline void clear_trace_flag();
  
!   inline void set_obj_deopt_flag();
!   inline void clear_obj_deopt_flag();
  
    // Support for Unhandled Oop detection
    // Add the field for both, fastdebug and debug, builds to keep
    // Thread's fields layout the same.
    // Note: CHECK_UNHANDLED_OOPS is defined only for fastdebug build.
*** 618,628 ****
  
    JFR_ONLY(DEFINE_THREAD_LOCAL_ACCESSOR_JFR;)
  
    bool is_trace_suspend()               { return (_suspend_flags & _trace_flag) != 0; }
  
!   bool is_ea_obj_deopt_suspend()        { return (_suspend_flags & _ea_obj_deopt) != 0; }
  
    // VM operation support
    int vm_operation_ticket()                      { return ++_vm_operation_started_count; }
    int vm_operation_completed_count()             { return _vm_operation_completed_count; }
    void increment_vm_operation_completed_count()  { _vm_operation_completed_count++; }
--- 617,627 ----
  
    JFR_ONLY(DEFINE_THREAD_LOCAL_ACCESSOR_JFR;)
  
    bool is_trace_suspend()               { return (_suspend_flags & _trace_flag) != 0; }
  
!   bool is_obj_deopt_suspend()           { return (_suspend_flags & _obj_deopt) != 0; }
  
    // VM operation support
    int vm_operation_ticket()                      { return ++_vm_operation_started_count; }
    int vm_operation_completed_count()             { return _vm_operation_completed_count; }
    void increment_vm_operation_completed_count()  { _vm_operation_completed_count++; }
*** 1444,1454 ****
      return (_suspend_flags & _external_suspend) != 0;
    }
    // Whenever a thread transitions from native to vm/java it must suspend
    // if external|deopt suspend is present.
    bool is_suspend_after_native() const {
!     return (_suspend_flags & (_external_suspend | _ea_obj_deopt JFR_ONLY(| _trace_flag))) != 0;
    }
  
    // external suspend request is completed
    bool is_ext_suspended() const {
      return (_suspend_flags & _ext_suspended) != 0;
--- 1443,1453 ----
      return (_suspend_flags & _external_suspend) != 0;
    }
    // Whenever a thread transitions from native to vm/java it must suspend
    // if external|deopt suspend is present.
    bool is_suspend_after_native() const {
!     return (_suspend_flags & (_external_suspend | _obj_deopt JFR_ONLY(| _trace_flag))) != 0;
    }
  
    // external suspend request is completed
    bool is_ext_suspended() const {
      return (_suspend_flags & _ext_suspended) != 0;
*** 1517,1527 ****
      // we will see the new flag value the next time through. It's also
      // possible that the external suspend request is dropped after
      // we have checked is_external_suspend(), we will recheck its value
      // under SR_lock in java_suspend_self().
      return (_special_runtime_exit_condition != _no_async_condition) ||
!             is_external_suspend() || is_trace_suspend() || is_ea_obj_deopt_suspend();
    }
  
    void set_pending_unsafe_access_error()          { _special_runtime_exit_condition = _async_unsafe_access_error; }
  
    inline void set_pending_async_exception(oop e);
--- 1516,1526 ----
      // we will see the new flag value the next time through. It's also
      // possible that the external suspend request is dropped after
      // we have checked is_external_suspend(), we will recheck its value
      // under SR_lock in java_suspend_self().
      return (_special_runtime_exit_condition != _no_async_condition) ||
!             is_external_suspend() || is_trace_suspend() || is_obj_deopt_suspend();
    }
  
    void set_pending_unsafe_access_error()          { _special_runtime_exit_condition = _async_unsafe_access_error; }
  
    inline void set_pending_async_exception(oop e);