jdk8-mips64-public/hotspot: src/share/vm/runtime/deoptimization.hpp@91ddc23482a4 (annotated)

src/share/vm/runtime/deoptimization.hpp@91ddc23482a4 (annotated)

src/share/vm/runtime/deoptimization.hpp

Thu, 24 May 2018 20:03:11 +0800

author: aoqi
date: Thu, 24 May 2018 20:03:11 +0800
changeset 8868: 91ddc23482a4
parent 7535: 7ae4e26cb1e0
permissions: -rw-r--r--

Increase MaxHeapSize for better performance on MIPS

 /*
  * Copyright (c) 1997, 2012, 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_RUNTIME_DEOPTIMIZATION_HPP
 #define SHARE_VM_RUNTIME_DEOPTIMIZATION_HPP
 #include "memory/allocation.hpp"
 #include "runtime/frame.inline.hpp"
 class ProfileData;
 class vframeArray;
 class MonitorValue;
 class ObjectValue;
 class Deoptimization : AllStatic {
   friend class VMStructs;
  public:
   // What condition caused the deoptimization?
   enum DeoptReason {
     Reason_many = -1,             // indicates presence of several reasons
     Reason_none = 0,              // indicates absence of a relevant deopt.
     // Next 7 reasons are recorded per bytecode in DataLayout::trap_bits
     Reason_null_check,            // saw unexpected null or zero divisor (@bci)
     Reason_null_assert,           // saw unexpected non-null or non-zero (@bci)
     Reason_range_check,           // saw unexpected array index (@bci)
     Reason_class_check,           // saw unexpected object class (@bci)
     Reason_array_check,           // saw unexpected array class (aastore @bci)
     Reason_intrinsic,             // saw unexpected operand to intrinsic (@bci)
     Reason_bimorphic,             // saw unexpected object class in bimorphic inlining (@bci)
     Reason_unloaded,              // unloaded class or constant pool entry
     Reason_uninitialized,         // bad class state (uninitialized)
     Reason_unreached,             // code is not reached, compiler
     Reason_unhandled,             // arbitrary compiler limitation
     Reason_constraint,            // arbitrary runtime constraint violated
     Reason_div0_check,            // a null_check due to division by zero
     Reason_age,                   // nmethod too old; tier threshold reached
     Reason_predicate,             // compiler generated predicate failed
     Reason_loop_limit_check,      // compiler generated loop limits check failed
     Reason_speculate_class_check, // saw unexpected object class from type speculation
     Reason_rtm_state_change,      // rtm state change detected
     Reason_unstable_if,           // a branch predicted always false was taken
     Reason_LIMIT,
     // Note:  Keep this enum in sync. with _trap_reason_name.
     Reason_RECORDED_LIMIT = Reason_bimorphic  // some are not recorded per bc
     // Note:  Reason_RECORDED_LIMIT should be < 8 to fit into 3 bits of
     // DataLayout::trap_bits.  This dependency is enforced indirectly
     // via asserts, to avoid excessive direct header-to-header dependencies.
     // See Deoptimization::trap_state_reason and class DataLayout.
   };
   // What action must be taken by the runtime?
   enum DeoptAction {
     Action_none,                  // just interpret, do not invalidate nmethod
     Action_maybe_recompile,       // recompile the nmethod; need not invalidate
     Action_reinterpret,           // invalidate the nmethod, reset IC, maybe recompile
     Action_make_not_entrant,      // invalidate the nmethod, recompile (probably)
     Action_make_not_compilable,   // invalidate the nmethod and do not compile
     Action_LIMIT
     // Note:  Keep this enum in sync. with _trap_action_name.
   };
   enum {
     _action_bits = 3,
     _reason_bits = 5,
     _action_shift = 0,
     _reason_shift = _action_shift+_action_bits,
     BC_CASE_LIMIT = PRODUCT_ONLY(1) NOT_PRODUCT(4) // for _deoptimization_hist
   };
   enum UnpackType {
     Unpack_deopt                = 0, // normal deoptimization, use pc computed in unpack_vframe_on_stack
     Unpack_exception            = 1, // exception is pending
     Unpack_uncommon_trap        = 2, // redo last byte code (C2 only)
     Unpack_reexecute            = 3  // reexecute bytecode (C1 only)
   };
   // Checks all compiled methods. Invalid methods are deleted and
   // corresponding activations are deoptimized.
   static int deoptimize_dependents();
   // Deoptimizes a frame lazily. nmethod gets patched deopt happens on return to the frame
   static void deoptimize(JavaThread* thread, frame fr, RegisterMap *reg_map);
   private:
   // Does the actual work for deoptimizing a single frame
   static void deoptimize_single_frame(JavaThread* thread, frame fr);
   // Helper function to revoke biases of all monitors in frame if UseBiasedLocking
   // is enabled
   static void revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map);
   // Helper function to revoke biases of all monitors in frames
   // executing in a particular CodeBlob if UseBiasedLocking is enabled
   static void revoke_biases_of_monitors(CodeBlob* cb);
 #ifdef COMPILER2
   // Support for restoring non-escaping objects
   static bool realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS);
   static void reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type);
   static void reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj);
   static void reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects, bool realloc_failures);
   static void relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread, bool realloc_failures);
   static void pop_frames_failed_reallocs(JavaThread* thread, vframeArray* array);
   NOT_PRODUCT(static void print_objects(GrowableArray<ScopeValue*>* objects, bool realloc_failures);)
 #endif // COMPILER2
   public:
   static vframeArray* create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk, bool realloc_failures);
   // Interface used for unpacking deoptimized frames
   // UnrollBlock is returned by fetch_unroll_info() to the deoptimization handler (blob).
   // This is only a CheapObj to ease debugging after a deopt failure
   class UnrollBlock : public CHeapObj<mtCompiler> {
    private:
     int       _size_of_deoptimized_frame; // Size, in bytes, of current deoptimized frame
     int       _caller_adjustment;         // Adjustment, in bytes, to caller's SP by initial interpreted frame
     int       _number_of_frames;          // Number frames to unroll
     int       _total_frame_sizes;         // Total of number*sizes frames
     intptr_t* _frame_sizes;               // Array of frame sizes, in bytes, for unrolling the stack
     address*  _frame_pcs;                 // Array of frame pc's, in bytes, for unrolling the stack
     intptr_t* _register_block;            // Block for storing callee-saved registers.
     BasicType _return_type;               // Tells if we have to restore double or long return value
     intptr_t  _initial_info;              // Platform dependent data for the sender frame (was FP on x86)
     int       _caller_actual_parameters;  // The number of actual arguments at the
                                           // interpreted caller of the deoptimized frame
     // The following fields are used as temps during the unpacking phase
     // (which is tight on registers, especially on x86). They really ought
     // to be PD variables but that involves moving this class into its own
     // file to use the pd include mechanism. Maybe in a later cleanup ...
     intptr_t  _counter_temp;              // SHOULD BE PD VARIABLE (x86 frame count temp)
     intptr_t  _unpack_kind;               // SHOULD BE PD VARIABLE (x86 unpack kind)
     intptr_t  _sender_sp_temp;            // SHOULD BE PD VARIABLE (x86 sender_sp)
    public:
     // Constructor
     UnrollBlock(int  size_of_deoptimized_frame,
                 int  caller_adjustment,
                 int  caller_actual_parameters,
                 int  number_of_frames,
                 intptr_t* frame_sizes,
                 address* frames_pcs,
                 BasicType return_type);
     ~UnrollBlock();
     // Returns where a register is located.
     intptr_t* value_addr_at(int register_number) const;
     // Accessors
     intptr_t* frame_sizes()  const { return _frame_sizes; }
     int number_of_frames()  const { return _number_of_frames; }
     address*  frame_pcs()   const { return _frame_pcs ; }
     // Returns the total size of frames
     int size_of_frames() const;
     void set_initial_info(intptr_t info) { _initial_info = info; }
     int caller_actual_parameters() const { return _caller_actual_parameters; }
     // Accessors used by the code generator for the unpack stub.
     static int size_of_deoptimized_frame_offset_in_bytes() { return offset_of(UnrollBlock, _size_of_deoptimized_frame); }
     static int caller_adjustment_offset_in_bytes()         { return offset_of(UnrollBlock, _caller_adjustment);         }
     static int number_of_frames_offset_in_bytes()          { return offset_of(UnrollBlock, _number_of_frames);          }
     static int frame_sizes_offset_in_bytes()               { return offset_of(UnrollBlock, _frame_sizes);               }
     static int total_frame_sizes_offset_in_bytes()         { return offset_of(UnrollBlock, _total_frame_sizes);         }
     static int frame_pcs_offset_in_bytes()                 { return offset_of(UnrollBlock, _frame_pcs);                 }
     static int register_block_offset_in_bytes()            { return offset_of(UnrollBlock, _register_block);            }
     static int return_type_offset_in_bytes()               { return offset_of(UnrollBlock, _return_type);               }
     static int counter_temp_offset_in_bytes()              { return offset_of(UnrollBlock, _counter_temp);              }
     static int initial_info_offset_in_bytes()              { return offset_of(UnrollBlock, _initial_info);              }
     static int unpack_kind_offset_in_bytes()               { return offset_of(UnrollBlock, _unpack_kind);               }
     static int sender_sp_temp_offset_in_bytes()            { return offset_of(UnrollBlock, _sender_sp_temp);            }
     BasicType return_type() const { return _return_type; }
     void print();
   };
   //** Returns an UnrollBlock continuing information
   // how to make room for the resulting interpreter frames.
   // Called by assembly stub after execution has returned to
   // deoptimized frame.
   // @argument thread.     Thread where stub_frame resides.
   // @see OptoRuntime::deoptimization_fetch_unroll_info_C
   static UnrollBlock* fetch_unroll_info(JavaThread* thread);
   //** Unpacks vframeArray onto execution stack
   // Called by assembly stub after execution has returned to
   // deoptimized frame and after the stack unrolling.
   // @argument thread.     Thread where stub_frame resides.
   // @argument exec_mode.  Determines how execution should be continuted in top frame.
   //                       0 means continue after current byte code
   //                       1 means exception has happened, handle exception
   //                       2 means reexecute current bytecode (for uncommon traps).
   // @see OptoRuntime::deoptimization_unpack_frames_C
   // Return BasicType of call return type, if any
   static BasicType unpack_frames(JavaThread* thread, int exec_mode);
   // Cleans up deoptimization bits on thread after unpacking or in the
   // case of an exception.
   static void cleanup_deopt_info(JavaThread  *thread,
                                  vframeArray * array);
   // Restores callee saved values from deoptimized frame into oldest interpreter frame
   // so caller of the deoptimized frame will get back the values it expects.
   static void unwind_callee_save_values(frame* f, vframeArray* vframe_array);
   //** Performs an uncommon trap for compiled code.
   // The top most compiler frame is converted into interpreter frames
   static UnrollBlock* uncommon_trap(JavaThread* thread, jint unloaded_class_index);
   // Helper routine that enters the VM and may block
   static void uncommon_trap_inner(JavaThread* thread, jint unloaded_class_index);
   //** Deoptimizes the frame identified by id.
   // Only called from VMDeoptimizeFrame
   // @argument thread.     Thread where stub_frame resides.
   // @argument id.         id of frame that should be deoptimized.
   static void deoptimize_frame_internal(JavaThread* thread, intptr_t* id);
   // If thread is not the current thread then execute
   // VM_DeoptimizeFrame otherwise deoptimize directly.
   static void deoptimize_frame(JavaThread* thread, intptr_t* id);
   // Statistics
   static void gather_statistics(DeoptReason reason, DeoptAction action,
                                 Bytecodes::Code bc = Bytecodes::_illegal);
   static void print_statistics();
   // How much room to adjust the last frame's SP by, to make space for
   // the callee's interpreter frame (which expects locals to be next to
   // incoming arguments)
   static int last_frame_adjust(int callee_parameters, int callee_locals);
   // trap_request codes
   static DeoptReason trap_request_reason(int trap_request) {
     if (trap_request < 0)
       return (DeoptReason)
         ((~(trap_request) >> _reason_shift) & right_n_bits(_reason_bits));
     else
       // standard reason for unloaded CP entry
       return Reason_unloaded;
   }
   static DeoptAction trap_request_action(int trap_request) {
     if (trap_request < 0)
       return (DeoptAction)
         ((~(trap_request) >> _action_shift) & right_n_bits(_action_bits));
     else
       // standard action for unloaded CP entry
       return _unloaded_action;
   }
   static int trap_request_index(int trap_request) {
     if (trap_request < 0)
       return -1;
     else
       return trap_request;
   }
   static int make_trap_request(DeoptReason reason, DeoptAction action,
                                int index = -1) {
     assert((1 << _reason_bits) >= Reason_LIMIT, "enough bits");
     assert((1 << _action_bits) >= Action_LIMIT, "enough bits");
     int trap_request;
     if (index != -1)
       trap_request = index;
     else
       trap_request = (~(((reason) << _reason_shift)
                         + ((action) << _action_shift)));
     assert(reason == trap_request_reason(trap_request), "valid reason");
     assert(action == trap_request_action(trap_request), "valid action");
     assert(index  == trap_request_index(trap_request),  "valid index");
     return trap_request;
   }
   // The trap_state stored in a MDO is decoded here.
   // It records two items of information.
   //  reason:  If a deoptimization happened here, what its reason was,
   //           or if there were multiple deopts with differing reasons.
   //  recompiled: If a deoptimization here triggered a recompilation.
   // Note that not all reasons are recorded per-bci.
   static DeoptReason trap_state_reason(int trap_state);
   static int  trap_state_has_reason(int trap_state, int reason);
   static int  trap_state_add_reason(int trap_state, int reason);
   static bool trap_state_is_recompiled(int trap_state);
   static int  trap_state_set_recompiled(int trap_state, bool z);
   static const char* format_trap_state(char* buf, size_t buflen,
                                        int trap_state);
   static bool reason_is_recorded_per_bytecode(DeoptReason reason) {
     return reason > Reason_none && reason <= Reason_RECORDED_LIMIT;
   }
   static DeoptReason reason_recorded_per_bytecode_if_any(DeoptReason reason) {
     if (reason_is_recorded_per_bytecode(reason))
       return reason;
     else if (reason == Reason_div0_check) // null check due to divide-by-zero?
       return Reason_null_check;           // recorded per BCI as a null check
     else if (reason == Reason_speculate_class_check)
       return Reason_class_check;
     else if (reason == Reason_unstable_if)
       return Reason_intrinsic;
     else
       return Reason_none;
   }
   static bool reason_is_speculate(int reason) {
     if (reason == Reason_speculate_class_check) {
       return true;
     }
     return false;
   }
   static uint per_method_trap_limit(int reason) {
     return reason_is_speculate(reason) ? (uint)PerMethodSpecTrapLimit : (uint)PerMethodTrapLimit;
   }
   static const char* trap_reason_name(int reason);
   static const char* trap_action_name(int action);
   // Format like reason='foo' action='bar' index='123'.
   // This is suitable both for XML and for tty output.
   static const char* format_trap_request(char* buf, size_t buflen,
                                          int trap_request);
   static jint total_deoptimization_count();
   static jint deoptimization_count(DeoptReason reason);
   // JVMTI PopFrame support
   // Preserves incoming arguments to the popped frame when it is
   // returning to a deoptimized caller
   static void popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address);
  private:
   static MethodData* get_method_data(JavaThread* thread, methodHandle m, bool create_if_missing);
   // Update the mdo's count and per-BCI reason bits, returning previous state:
   static ProfileData* query_update_method_data(MethodData* trap_mdo,
                                                int trap_bci,
                                                DeoptReason reason,
                                                Method* compiled_method,
                                                //outputs:
                                                uint& ret_this_trap_count,
                                                bool& ret_maybe_prior_trap,
                                                bool& ret_maybe_prior_recompile);
   // class loading support for uncommon trap
   static void load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS);
   static void load_class_by_index(constantPoolHandle constant_pool, int index);
   static UnrollBlock* fetch_unroll_info_helper(JavaThread* thread);
   static DeoptAction _unloaded_action; // == Action_reinterpret;
   static const char* _trap_reason_name[Reason_LIMIT];
   static const char* _trap_action_name[Action_LIMIT];
   static juint _deoptimization_hist[Reason_LIMIT][1+Action_LIMIT][BC_CASE_LIMIT];
   // Note:  Histogram array size is 1-2 Kb.
  public:
   static void update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason);
 };
 class DeoptimizationMarker : StackObj {  // for profiling
   static bool _is_active;
 public:
   DeoptimizationMarker()  { _is_active = true; }
   ~DeoptimizationMarker() { _is_active = false; }
   static bool is_active() { return _is_active; }
 };
 #endif // SHARE_VM_RUNTIME_DEOPTIMIZATION_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/deoptimization.hpp@91ddc23482a4 (annotated)

src/share/vm/runtime/deoptimization.hpp