jdk8-mips64-public/hotspot: src/share/vm/code/pcDesc.hpp@a248d0be1309

8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com

     1 /*

     2  * Copyright (c) 1997, 2010, 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  */

    25 #ifndef SHARE_VM_CODE_PCDESC_HPP

    26 #define SHARE_VM_CODE_PCDESC_HPP

    28 #include "memory/allocation.hpp"

    30 // PcDescs map a physical PC (given as offset from start of nmethod) to

    31 // the corresponding source scope and byte code index.

    33 class nmethod;

    35 class PcDesc VALUE_OBJ_CLASS_SPEC {

    36   friend class VMStructs;

    37  private:

    38   int _pc_offset;           // offset from start of nmethod

    39   int _scope_decode_offset; // offset for scope in nmethod

    40   int _obj_decode_offset;

    42   enum {

    43     PCDESC_reexecute               = 1 << 0,

    44     PCDESC_is_method_handle_invoke = 1 << 1,

    45     PCDESC_return_oop              = 1 << 2

    46   };

    48   int _flags;

    50   void set_flag(int mask, bool z) {

    51     _flags = z ? (_flags | mask) : (_flags & ~mask);

    52   }

    54  public:

    55   int pc_offset() const           { return _pc_offset;   }

    56   int scope_decode_offset() const { return _scope_decode_offset; }

    57   int obj_decode_offset() const   { return _obj_decode_offset; }

    59   void set_pc_offset(int x)           { _pc_offset           = x; }

    60   void set_scope_decode_offset(int x) { _scope_decode_offset = x; }

    61   void set_obj_decode_offset(int x)   { _obj_decode_offset   = x; }

    63   // Constructor (only used for static in nmethod.cpp)

    64   // Also used by ScopeDesc::sender()]

    65   PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset);

    67   enum {

    68     // upper and lower exclusive limits real offsets:

    69     lower_offset_limit = -1,

    70     upper_offset_limit = (unsigned int)-1 >> 1

    71   };

    73   // Flags

    74   bool     should_reexecute()              const { return (_flags & PCDESC_reexecute) != 0; }

    75   void set_should_reexecute(bool z)              { set_flag(PCDESC_reexecute, z); }

    77   // Does pd refer to the same information as pd?

    78   bool is_same_info(const PcDesc* pd) {

    79     return _scope_decode_offset == pd->_scope_decode_offset &&

    80       _obj_decode_offset == pd->_obj_decode_offset &&

    81       _flags == pd->_flags;

    82   }

    84   bool     is_method_handle_invoke()       const { return (_flags & PCDESC_is_method_handle_invoke) != 0;     }

    85   void set_is_method_handle_invoke(bool z)       { set_flag(PCDESC_is_method_handle_invoke, z); }

    87   bool     return_oop()                    const { return (_flags & PCDESC_return_oop) != 0;     }

    88   void set_return_oop(bool z)                    { set_flag(PCDESC_return_oop, z); }

    90   // Returns the real pc

    91   address real_pc(const nmethod* code) const;

    93   void print(nmethod* code);

    94   bool verify(nmethod* code);

    95 };

    97 #endif // SHARE_VM_CODE_PCDESC_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/code/pcDesc.hpp@a248d0be1309

src/share/vm/code/pcDesc.hpp