1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/frame_x86.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,193 @@
1.4 +/*
1.5 + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// A frame represents a physical stack frame (an activation). Frames can be
1.29 +// C or Java frames, and the Java frames can be interpreted or compiled.
1.30 +// In contrast, vframes represent source-level activations, so that one physical frame
1.31 +// can correspond to multiple source level frames because of inlining.
1.32 +// A frame is comprised of {pc, fp, sp}
1.33 +// ------------------------------ Asm interpreter ----------------------------------------
1.34 +// Layout of asm interpreter frame:
1.35 +// [expression stack ] * <- sp
1.36 +// [monitors ] \
1.37 +// ... | monitor block size
1.38 +// [monitors ] /
1.39 +// [monitor block size ]
1.40 +// [byte code index/pointr] = bcx() bcx_offset
1.41 +// [pointer to locals ] = locals() locals_offset
1.42 +// [constant pool cache ] = cache() cache_offset
1.43 +// [methodData ] = mdp() mdx_offset
1.44 +// [methodOop ] = method() method_offset
1.45 +// [last sp ] = last_sp() last_sp_offset
1.46 +// [old stack pointer ] (sender_sp) sender_sp_offset
1.47 +// [old frame pointer ] <- fp = link()
1.48 +// [return pc ]
1.49 +// [oop temp ] (only for native calls)
1.50 +// [locals and parameters ]
1.51 +// <- sender sp
1.52 +// ------------------------------ Asm interpreter ----------------------------------------
1.53 +
1.54 +// ------------------------------ C++ interpreter ----------------------------------------
1.55 +//
1.56 +// Layout of C++ interpreter frame: (While executing in BytecodeInterpreter::run)
1.57 +//
1.58 +// <- SP (current esp/rsp)
1.59 +// [local variables ] BytecodeInterpreter::run local variables
1.60 +// ... BytecodeInterpreter::run local variables
1.61 +// [local variables ] BytecodeInterpreter::run local variables
1.62 +// [old frame pointer ] fp [ BytecodeInterpreter::run's ebp/rbp ]
1.63 +// [return pc ] (return to frame manager)
1.64 +// [interpreter_state* ] (arg to BytecodeInterpreter::run) --------------
1.65 +// [expression stack ] <- last_Java_sp |
1.66 +// [... ] * <- interpreter_state.stack |
1.67 +// [expression stack ] * <- interpreter_state.stack_base |
1.68 +// [monitors ] \ |
1.69 +// ... | monitor block size |
1.70 +// [monitors ] / <- interpreter_state.monitor_base |
1.71 +// [struct interpretState ] <-----------------------------------------|
1.72 +// [return pc ] (return to callee of frame manager [1]
1.73 +// [locals and parameters ]
1.74 +// <- sender sp
1.75 +
1.76 +// [1] When the c++ interpreter calls a new method it returns to the frame
1.77 +// manager which allocates a new frame on the stack. In that case there
1.78 +// is no real callee of this newly allocated frame. The frame manager is
1.79 +// aware of the additional frame(s) and will pop them as nested calls
1.80 +// complete. Howevers tTo make it look good in the debugger the frame
1.81 +// manager actually installs a dummy pc pointing to RecursiveInterpreterActivation
1.82 +// with a fake interpreter_state* parameter to make it easy to debug
1.83 +// nested calls.
1.84 +
1.85 +// Note that contrary to the layout for the assembly interpreter the
1.86 +// expression stack allocated for the C++ interpreter is full sized.
1.87 +// However this is not as bad as it seems as the interpreter frame_manager
1.88 +// will truncate the unused space on succesive method calls.
1.89 +//
1.90 +// ------------------------------ C++ interpreter ----------------------------------------
1.91 +
1.92 + public:
1.93 + enum {
1.94 + pc_return_offset = 0,
1.95 + // All frames
1.96 + link_offset = 0,
1.97 + return_addr_offset = 1,
1.98 + // non-interpreter frames
1.99 + sender_sp_offset = 2,
1.100 +
1.101 +#ifndef CC_INTERP
1.102 +
1.103 + // Interpreter frames
1.104 + interpreter_frame_result_handler_offset = 3, // for native calls only
1.105 + interpreter_frame_oop_temp_offset = 2, // for native calls only
1.106 +
1.107 + interpreter_frame_sender_sp_offset = -1,
1.108 + // outgoing sp before a call to an invoked method
1.109 + interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1,
1.110 + interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1,
1.111 + interpreter_frame_mdx_offset = interpreter_frame_method_offset - 1,
1.112 + interpreter_frame_cache_offset = interpreter_frame_mdx_offset - 1,
1.113 + interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1,
1.114 + interpreter_frame_bcx_offset = interpreter_frame_locals_offset - 1,
1.115 + interpreter_frame_initial_sp_offset = interpreter_frame_bcx_offset - 1,
1.116 +
1.117 + interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset,
1.118 + interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset,
1.119 +
1.120 +#endif // CC_INTERP
1.121 +
1.122 + // Entry frames
1.123 +#ifdef AMD64
1.124 +#ifdef _WIN64
1.125 + entry_frame_after_call_words = 8,
1.126 + entry_frame_call_wrapper_offset = 2,
1.127 +
1.128 + arg_reg_save_area_bytes = 32, // Register argument save area
1.129 +#else
1.130 + entry_frame_after_call_words = 13,
1.131 + entry_frame_call_wrapper_offset = -6,
1.132 +
1.133 + arg_reg_save_area_bytes = 0,
1.134 +#endif // _WIN64
1.135 +#else
1.136 + entry_frame_call_wrapper_offset = 2,
1.137 +#endif // AMD64
1.138 +
1.139 + // Native frames
1.140 +
1.141 + native_frame_initial_param_offset = 2
1.142 +
1.143 + };
1.144 +
1.145 + intptr_t ptr_at(int offset) const {
1.146 + return *ptr_at_addr(offset);
1.147 + }
1.148 +
1.149 + void ptr_at_put(int offset, intptr_t value) {
1.150 + *ptr_at_addr(offset) = value;
1.151 + }
1.152 +
1.153 + private:
1.154 + // an additional field beyond _sp and _pc:
1.155 + intptr_t* _fp; // frame pointer
1.156 + // The interpreter and adapters will extend the frame of the caller.
1.157 + // Since oopMaps are based on the sp of the caller before extension
1.158 + // we need to know that value. However in order to compute the address
1.159 + // of the return address we need the real "raw" sp. Since sparc already
1.160 + // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's
1.161 + // original sp we use that convention.
1.162 +
1.163 + intptr_t* _unextended_sp;
1.164 +
1.165 + intptr_t* ptr_at_addr(int offset) const {
1.166 + return (intptr_t*) addr_at(offset);
1.167 + }
1.168 +
1.169 + public:
1.170 + // Constructors
1.171 +
1.172 + frame(intptr_t* sp, intptr_t* fp, address pc);
1.173 +
1.174 + frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc);
1.175 +
1.176 + frame(intptr_t* sp, intptr_t* fp);
1.177 +
1.178 + // accessors for the instance variables
1.179 + intptr_t* fp() const { return _fp; }
1.180 +
1.181 + inline address* sender_pc_addr() const;
1.182 +
1.183 + // return address of param, zero origin index.
1.184 + inline address* native_param_addr(int idx) const;
1.185 +
1.186 + // expression stack tos if we are nested in a java call
1.187 + intptr_t* interpreter_frame_last_sp() const;
1.188 +
1.189 +#ifndef CC_INTERP
1.190 + // deoptimization support
1.191 + void interpreter_frame_set_last_sp(intptr_t* sp);
1.192 +#endif // CC_INTERP
1.193 +
1.194 +#ifdef CC_INTERP
1.195 + inline interpreterState get_interpreterState() const;
1.196 +#endif // CC_INTERP
