jdk8-mips64-public/hotspot: src/cpu/x86/vm/c1_FpuStackSim

8229345: Memory leak due to vtable stubs not being shared on SPARC
Reviewed-by: mdoerr, dholmes, kvn

     1 /*

     2  * Copyright (c) 2005, 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 CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP

    26 #define CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP

    28 //  Simulates the FPU stack and maintains mapping [fpu-register -> stack offset]

    29 //  FPU registers are described as numbers from 0..nof_fpu_regs-1

    31 class Compilation;

    33 class FpuStackSim VALUE_OBJ_CLASS_SPEC {

    34  private:

    35   Compilation* _compilation;

    36   int          _stack_size;

    37   int          _regs[FrameMap::nof_fpu_regs];

    39   int tos_index() const                        { return _stack_size - 1; }

    41   int regs_at(int i) const;

    42   void set_regs_at(int i, int val);

    43   void dec_stack_size();

    44   void inc_stack_size();

    46   // unified bailout support

    47   Compilation*  compilation() const              { return _compilation; }

    48   void          bailout(const char* msg) const   { compilation()->bailout(msg); }

    49   bool          bailed_out() const               { return compilation()->bailed_out(); }

    51  public:

    52   FpuStackSim(Compilation* compilation);

    53   void pop ();

    54   void pop (int rnr);                          // rnr must be on tos

    55   void push(int rnr);

    56   void swap(int offset);                       // exchange tos with tos + offset

    57   int offset_from_tos(int rnr) const;          // return the offset of the topmost instance of rnr from TOS

    58   int  get_slot(int tos_offset) const;         // return the entry at the given offset from TOS

    59   void set_slot(int tos_offset, int rnr);      // set the entry at the given offset from TOS

    60   void rename(int old_rnr, int new_rnr);       // rename all instances of old_rnr to new_rnr

    61   bool contains(int rnr);                      // debugging support only

    62   bool is_empty();

    63   bool slot_is_empty(int tos_offset);

    64   int stack_size() const                       { return _stack_size; }

    65   void clear();

    66   intArray* write_state();

    67   void read_state(intArray* fpu_stack_state);

    69   void print() PRODUCT_RETURN;

    70 };

    72 #endif // CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP

src/cpu/x86/vm/c1_FpuStackSim_x86.hpp@bb1da64b0492