1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/sparc/vm/frame_sparc.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,274 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef CPU_SPARC_VM_FRAME_SPARC_HPP
1.29 +#define CPU_SPARC_VM_FRAME_SPARC_HPP
1.30 +
1.31 +#include "runtime/synchronizer.hpp"
1.32 +#include "utilities/top.hpp"
1.33 +
1.34 +// A frame represents a physical stack frame (an activation). Frames can be
1.35 +// C or Java frames, and the Java frames can be interpreted or compiled.
1.36 +// In contrast, vframes represent source-level activations, so that one physical frame
1.37 +// can correspond to multiple source level frames because of inlining.
1.38 +// A frame is comprised of {pc, sp, younger_sp}
1.39 +
1.40 +
1.41 +// Layout of asm interpreter frame:
1.42 +//
1.43 +// 0xfffffff
1.44 +// ......
1.45 +// [last extra incoming arg, (local # Nargs > 6 ? Nargs-1 : undef)]
1.46 +// .. Note: incoming args are copied to local frame area upon entry
1.47 +// [first extra incoming arg, (local # Nargs > 6 ? 6 : undef)]
1.48 +// [6 words for C-arg storage (unused)] Are this and next one really needed?
1.49 +// [C-aggregate-word (unused)] Yes, if want extra params to be in same place as C convention
1.50 +// [16 words for register saving] <--- FP
1.51 +// [interpreter_frame_vm_locals ] (see below)
1.52 +
1.53 +// Note: Llocals is always double-word aligned
1.54 +// [first local i.e. local # 0] <-- Llocals
1.55 +// ...
1.56 +// [last local, i.e. local # Nlocals-1]
1.57 +
1.58 +// [monitors ]
1.59 +// ....
1.60 +// [monitors ] <-- Lmonitors (same as Llocals + 6*4 if none)
1.61 +// (must be double-word aligned because
1.62 +// monitor element size is constrained to
1.63 +// doubleword)
1.64 +//
1.65 +// <-- Lesp (points 1 past TOS)
1.66 +// [bottom word used for stack ]
1.67 +// ...
1.68 +// [top word used for stack] (first word of stack is double-word aligned)
1.69 +
1.70 +// [space for outgoing args (conservatively allocated as max_stack - 6 + interpreter_frame_extra_outgoing_argument_words)]
1.71 +// [6 words for C-arg storage]
1.72 +// [C-aggregate-word (unused)]
1.73 +// [16 words for register saving] <--- SP
1.74 +// ...
1.75 +// 0x0000000
1.76 +//
1.77 +// The in registers and local registers are preserved in a block at SP.
1.78 +//
1.79 +// The first six in registers (I0..I5) hold the first six locals.
1.80 +// The locals are used as follows:
1.81 +// Lesp first free element of expression stack
1.82 +// (which grows towards __higher__ addresses)
1.83 +// Lbcp is set to address of bytecode to execute
1.84 +// It is accessed in the frame under the name "bcx".
1.85 +// It may at times (during GC) be an index instead.
1.86 +// Lmethod the method being interpreted
1.87 +// Llocals the base pointer for accessing the locals array
1.88 +// (lower-numbered locals have lower addresses)
1.89 +// Lmonitors the base pointer for accessing active monitors
1.90 +// Lcache a saved pointer to the method's constant pool cache
1.91 +//
1.92 +//
1.93 +// When calling out to another method,
1.94 +// G5_method is set to method to call, G5_inline_cache_klass may be set,
1.95 +// parameters are put in O registers, and also extra parameters
1.96 +// must be cleverly copied from the top of stack to the outgoing param area in the frame,
1.97 +// ------------------------------ C++ interpreter ----------------------------------------
1.98 +// Layout of C++ interpreter frame:
1.99 +//
1.100 +
1.101 +
1.102 +
1.103 +// All frames:
1.104 +
1.105 + public:
1.106 +
1.107 + enum {
1.108 + // normal return address is 2 words past PC
1.109 + pc_return_offset = 2 * BytesPerInstWord,
1.110 +
1.111 + // size of each block, in order of increasing address:
1.112 + register_save_words = 16,
1.113 +#ifdef _LP64
1.114 + callee_aggregate_return_pointer_words = 0,
1.115 +#else
1.116 + callee_aggregate_return_pointer_words = 1,
1.117 +#endif
1.118 + callee_register_argument_save_area_words = 6,
1.119 + // memory_parameter_words = <arbitrary>,
1.120 +
1.121 + // offset of each block, in order of increasing address:
1.122 + // (note: callee_register_argument_save_area_words == Assembler::n_register_parameters)
1.123 + register_save_words_sp_offset = 0,
1.124 + callee_aggregate_return_pointer_sp_offset = register_save_words_sp_offset + register_save_words,
1.125 + callee_register_argument_save_area_sp_offset = callee_aggregate_return_pointer_sp_offset + callee_aggregate_return_pointer_words,
1.126 + memory_parameter_word_sp_offset = callee_register_argument_save_area_sp_offset + callee_register_argument_save_area_words,
1.127 + varargs_offset = memory_parameter_word_sp_offset
1.128 + };
1.129 +
1.130 + private:
1.131 + intptr_t* _younger_sp; // optional SP of callee (used to locate O7)
1.132 + int _sp_adjustment_by_callee; // adjustment in words to SP by callee for making locals contiguous
1.133 +
1.134 + // Note: On SPARC, unlike Intel, the saved PC for a stack frame
1.135 + // is stored at a __variable__ distance from that frame's SP.
1.136 + // (In fact, it may be in the register save area of the callee frame,
1.137 + // but that fact need not bother us.) Thus, we must store the
1.138 + // address of that saved PC explicitly. On the other hand, SPARC
1.139 + // stores the FP for a frame at a fixed offset from the frame's SP,
1.140 + // so there is no need for a separate "frame::_fp" field.
1.141 +
1.142 + public:
1.143 + // Accessors
1.144 +
1.145 + intptr_t* younger_sp() const {
1.146 + assert(_younger_sp != NULL, "frame must possess a younger_sp");
1.147 + return _younger_sp;
1.148 + }
1.149 +
1.150 + int callee_sp_adjustment() const { return _sp_adjustment_by_callee; }
1.151 + void set_sp_adjustment_by_callee(int number_of_words) { _sp_adjustment_by_callee = number_of_words; }
1.152 +
1.153 + // Constructors
1.154 +
1.155 + // This constructor relies on the fact that the creator of a frame
1.156 + // has flushed register windows which the frame will refer to, and
1.157 + // that those register windows will not be reloaded until the frame is
1.158 + // done reading and writing the stack. Moreover, if the "younger_sp"
1.159 + // argument points into the register save area of the next younger
1.160 + // frame (though it need not), the register window for that next
1.161 + // younger frame must also stay flushed. (The caller is responsible
1.162 + // for ensuring this.)
1.163 +
1.164 + frame(intptr_t* sp, intptr_t* younger_sp, bool younger_frame_adjusted_stack = false);
1.165 +
1.166 + // make a deficient frame which doesn't know where its PC is:
1.167 + enum unpatchable_t { unpatchable };
1.168 + frame(intptr_t* sp, unpatchable_t, address pc = NULL, CodeBlob* cb = NULL);
1.169 +
1.170 + // Walk from sp outward looking for old_sp, and return old_sp's predecessor
1.171 + // (i.e. return the sp from the frame where old_sp is the fp).
1.172 + // Register windows are assumed to be flushed for the stack in question.
1.173 +
1.174 + static intptr_t* next_younger_sp_or_null(intptr_t* old_sp, intptr_t* sp);
1.175 +
1.176 + // Return true if sp is a younger sp in the stack described by valid_sp.
1.177 + static bool is_valid_stack_pointer(intptr_t* valid_sp, intptr_t* sp);
1.178 +
1.179 + public:
1.180 + // accessors for the instance variables
1.181 + intptr_t* fp() const { return (intptr_t*) ((intptr_t)(sp()[FP->sp_offset_in_saved_window()]) + STACK_BIAS ); }
1.182 +
1.183 + // All frames
1.184 +
1.185 + intptr_t* fp_addr_at(int index) const { return &fp()[index]; }
1.186 + intptr_t* sp_addr_at(int index) const { return &sp()[index]; }
1.187 + intptr_t fp_at( int index) const { return *fp_addr_at(index); }
1.188 + intptr_t sp_at( int index) const { return *sp_addr_at(index); }
1.189 +
1.190 + private:
1.191 + inline address* I7_addr() const;
1.192 + inline address* O7_addr() const;
1.193 +
1.194 + inline address* I0_addr() const;
1.195 + inline address* O0_addr() const;
1.196 + intptr_t* younger_sp_addr_at(int index) const { return &younger_sp()[index]; }
1.197 +
1.198 + public:
1.199 + // access to SPARC arguments and argument registers
1.200 +
1.201 + // Assumes reg is an in/local register
1.202 + intptr_t* register_addr(Register reg) const {
1.203 + return sp_addr_at(reg->sp_offset_in_saved_window());
1.204 + }
1.205 +
1.206 + // Assumes reg is an out register
1.207 + intptr_t* out_register_addr(Register reg) const {
1.208 + return younger_sp_addr_at(reg->after_save()->sp_offset_in_saved_window());
1.209 + }
1.210 +
1.211 +
1.212 + // Interpreter frames
1.213 +
1.214 + public:
1.215 + // Asm interpreter
1.216 +#ifndef CC_INTERP
1.217 + enum interpreter_frame_vm_locals {
1.218 + // 2 words, also used to save float regs across calls to C
1.219 + interpreter_frame_d_scratch_fp_offset = -2,
1.220 + interpreter_frame_l_scratch_fp_offset = -4,
1.221 + interpreter_frame_padding_offset = -5, // for native calls only
1.222 + interpreter_frame_oop_temp_offset = -6, // for native calls only
1.223 + interpreter_frame_vm_locals_fp_offset = -6, // should be same as above, and should be zero mod 8
1.224 +
1.225 + interpreter_frame_vm_local_words = -interpreter_frame_vm_locals_fp_offset,
1.226 +
1.227 +
1.228 + // interpreter frame set-up needs to save 2 extra words in outgoing param area
1.229 + // for class and jnienv arguments for native stubs (see nativeStubGen_sparc.cpp_
1.230 +
1.231 + interpreter_frame_extra_outgoing_argument_words = 2
1.232 + };
1.233 +#else
1.234 + enum interpreter_frame_vm_locals {
1.235 + // 2 words, also used to save float regs across calls to C
1.236 + interpreter_state_ptr_offset = 0, // Is in L0 (Lstate) in save area
1.237 + interpreter_frame_mirror_offset = 1, // Is in L1 (Lmirror) in save area (for native calls only)
1.238 +
1.239 + // interpreter frame set-up needs to save 2 extra words in outgoing param area
1.240 + // for class and jnienv arguments for native stubs (see nativeStubGen_sparc.cpp_
1.241 +
1.242 + interpreter_frame_extra_outgoing_argument_words = 2
1.243 + };
1.244 +#endif /* CC_INTERP */
1.245 +
1.246 + enum compiler_frame_fixed_locals {
1.247 + compiler_frame_vm_locals_fp_offset = -2
1.248 + };
1.249 +
1.250 + private:
1.251 + ConstantPoolCache** interpreter_frame_cpoolcache_addr() const;
1.252 +
1.253 +#ifndef CC_INTERP
1.254 +
1.255 + // where Lmonitors is saved:
1.256 + inline BasicObjectLock** interpreter_frame_monitors_addr() const;
1.257 + inline intptr_t** interpreter_frame_esp_addr() const;
1.258 +
1.259 + inline void interpreter_frame_set_tos_address(intptr_t* x);
1.260 +
1.261 + // monitors:
1.262 +
1.263 + // next two fns read and write Lmonitors value,
1.264 + private:
1.265 + BasicObjectLock* interpreter_frame_monitors() const;
1.266 + void interpreter_frame_set_monitors(BasicObjectLock* monitors);
1.267 +#else
1.268 + public:
1.269 + inline interpreterState get_interpreterState() const {
1.270 + return ((interpreterState)sp_at(interpreter_state_ptr_offset));
1.271 + }
1.272 +
1.273 +#endif /* CC_INTERP */
1.274 +
1.275 + public:
1.276 +
1.277 +#endif // CPU_SPARC_VM_FRAME_SPARC_HPP
