jdk8-mips64-public/hotspot: src/share/vm/runtime/javaFrameAnchor.hpp@248ff38d2950

     1 /*

     2  * Copyright (c) 2002, 2011, 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_RUNTIME_JAVAFRAMEANCHOR_HPP

    26 #define SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP

    28 #include "utilities/globalDefinitions.hpp"

    29 #ifdef TARGET_OS_ARCH_linux_x86

    30 # include "orderAccess_linux_x86.inline.hpp"

    31 #endif

    32 #ifdef TARGET_OS_ARCH_linux_sparc

    33 # include "orderAccess_linux_sparc.inline.hpp"

    34 #endif

    35 #ifdef TARGET_OS_ARCH_linux_zero

    36 # include "orderAccess_linux_zero.inline.hpp"

    37 #endif

    38 #ifdef TARGET_OS_ARCH_solaris_x86

    39 # include "orderAccess_solaris_x86.inline.hpp"

    40 #endif

    41 #ifdef TARGET_OS_ARCH_solaris_sparc

    42 # include "orderAccess_solaris_sparc.inline.hpp"

    43 #endif

    44 #ifdef TARGET_OS_ARCH_windows_x86

    45 # include "orderAccess_windows_x86.inline.hpp"

    46 #endif

    47 #ifdef TARGET_OS_ARCH_linux_arm

    48 # include "orderAccess_linux_arm.inline.hpp"

    49 #endif

    50 #ifdef TARGET_OS_ARCH_linux_ppc

    51 # include "orderAccess_linux_ppc.inline.hpp"

    52 #endif

    53 #ifdef TARGET_OS_ARCH_aix_ppc

    54 # include "orderAccess_aix_ppc.inline.hpp"

    55 #endif

    56 #ifdef TARGET_OS_ARCH_bsd_x86

    57 # include "orderAccess_bsd_x86.inline.hpp"

    58 #endif

    59 #ifdef TARGET_OS_ARCH_bsd_zero

    60 # include "orderAccess_bsd_zero.inline.hpp"

    61 #endif

    63 //

    64 // An object for encapsulating the machine/os dependent part of a JavaThread frame state

    65 //

    66 class JavaThread;

    68 class JavaFrameAnchor VALUE_OBJ_CLASS_SPEC {

    69 // Too many friends...

    70 friend class CallNativeDirectNode;

    71 friend class OptoRuntime;

    72 friend class Runtime1;

    73 friend class StubAssembler;

    74 friend class CallRuntimeDirectNode;

    75 friend class MacroAssembler;

    76 friend class InterpreterGenerator;

    77 friend class LIR_Assembler;

    78 friend class GraphKit;

    79 friend class StubGenerator;

    80 friend class JavaThread;

    81 friend class frame;

    82 friend class VMStructs;

    83 friend class BytecodeInterpreter;

    84 friend class JavaCallWrapper;

    86  private:

    87   //

    88   // Whenever _last_Java_sp != NULL other anchor fields MUST be valid!

    89   // The stack may not be walkable [check with walkable() ] but the values must be valid.

    90   // The profiler apparently depends on this.

    91   //

    92   intptr_t* volatile _last_Java_sp;

    94   // Whenever we call from Java to native we can not be assured that the return

    95   // address that composes the last_Java_frame will be in an accessible location

    96   // so calls from Java to native store that pc (or one good enough to locate

    97   // the oopmap) in the frame anchor. Since the frames that call from Java to

    98   // native are never deoptimized we never need to patch the pc and so this

    99   // is acceptable.

   100   volatile  address _last_Java_pc;

   102   // tells whether the last Java frame is set

   103   // It is important that when last_Java_sp != NULL that the rest of the frame

   104   // anchor (including platform specific) all be valid.

   106   bool has_last_Java_frame() const                   { return _last_Java_sp != NULL; }

   107   // This is very dangerous unless sp == NULL

   108   // Invalidate the anchor so that has_last_frame is false

   109   // and no one should look at the other fields.

   110   void zap(void)                                     { _last_Java_sp = NULL; }

   112 #ifdef TARGET_ARCH_x86

   113 # include "javaFrameAnchor_x86.hpp"

   114 #endif

   115 #ifdef TARGET_ARCH_sparc

   116 # include "javaFrameAnchor_sparc.hpp"

   117 #endif

   118 #ifdef TARGET_ARCH_zero

   119 # include "javaFrameAnchor_zero.hpp"

   120 #endif

   121 #ifdef TARGET_ARCH_arm

   122 # include "javaFrameAnchor_arm.hpp"

   123 #endif

   124 #ifdef TARGET_ARCH_ppc

   125 # include "javaFrameAnchor_ppc.hpp"

   126 #endif

   129 public:

   130   JavaFrameAnchor()                              { clear(); }

   131   JavaFrameAnchor(JavaFrameAnchor *src)          { copy(src); }

   133   void set_last_Java_pc(address pc)              { _last_Java_pc = pc; }

   135   // Assembly stub generation helpers

   137   static ByteSize last_Java_sp_offset()          { return byte_offset_of(JavaFrameAnchor, _last_Java_sp); }

   138   static ByteSize last_Java_pc_offset()          { return byte_offset_of(JavaFrameAnchor, _last_Java_pc); }

   140 };

   142 #endif // SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP

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