author | ihse |
Mon, 26 Nov 2018 14:18:22 +0100 | |
branch | ihse-manpages-branch |
changeset 57043 | 23d7457ca4c6 |
parent 49480 | d7df2dd501ce |
child 53244 | 9807daeb47c4 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. |
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* Copyright (c) 2014, Red Hat Inc. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef CPU_AARCH64_VM_FRAME_AARCH64_HPP |
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#define CPU_AARCH64_VM_FRAME_AARCH64_HPP |
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#include "runtime/synchronizer.hpp" |
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// A frame represents a physical stack frame (an activation). Frames can be |
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// C or Java frames, and the Java frames can be interpreted or compiled. |
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// In contrast, vframes represent source-level activations, so that one physical frame |
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// can correspond to multiple source level frames because of inlining. |
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// A frame is comprised of {pc, fp, sp} |
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// ------------------------------ Asm interpreter ---------------------------------------- |
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// Layout of asm interpreter frame: |
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// [expression stack ] * <- sp |
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// [monitors[0] ] \ |
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// ... | monitor block size = k |
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// [monitors[k-1] ] / |
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// [frame initial esp ] ( == &monitors[0], initially here) initial_sp_offset |
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// [byte code index/pointr] = bcx() bcx_offset |
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// [pointer to locals ] = locals() locals_offset |
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// [constant pool cache ] = cache() cache_offset |
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// [klass of method ] = mirror() mirror_offset |
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// [padding ] |
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// [methodData ] = mdp() mdx_offset |
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// [methodOop ] = method() method_offset |
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// [last esp ] = last_sp() last_sp_offset |
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// [old stack pointer ] (sender_sp) sender_sp_offset |
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// [old frame pointer ] <- fp = link() |
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// [return pc ] |
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// [last sp ] |
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// [oop temp ] (only for native calls) |
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// [locals and parameters ] |
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// <- sender sp |
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// ------------------------------ Asm interpreter ---------------------------------------- |
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public: |
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enum { |
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pc_return_offset = 0, |
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// All frames |
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link_offset = 0, |
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return_addr_offset = 1, |
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sender_sp_offset = 2, |
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// Interpreter frames |
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interpreter_frame_oop_temp_offset = 3, // for native calls only |
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interpreter_frame_sender_sp_offset = -1, |
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// outgoing sp before a call to an invoked method |
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interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1, |
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interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1, |
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interpreter_frame_mdp_offset = interpreter_frame_method_offset - 1, |
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interpreter_frame_padding_offset = interpreter_frame_mdp_offset - 1, |
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interpreter_frame_mirror_offset = interpreter_frame_padding_offset - 1, |
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interpreter_frame_cache_offset = interpreter_frame_mirror_offset - 1, |
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interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1, |
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interpreter_frame_bcp_offset = interpreter_frame_locals_offset - 1, |
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interpreter_frame_initial_sp_offset = interpreter_frame_bcp_offset - 1, |
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interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset, |
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interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset, |
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// Entry frames |
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// n.b. these values are determined by the layout defined in |
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// stubGenerator for the Java call stub |
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entry_frame_after_call_words = 27, |
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entry_frame_call_wrapper_offset = -8, |
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// we don't need a save area |
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arg_reg_save_area_bytes = 0 |
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}; |
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intptr_t ptr_at(int offset) const { |
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return *ptr_at_addr(offset); |
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} |
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void ptr_at_put(int offset, intptr_t value) { |
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*ptr_at_addr(offset) = value; |
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} |
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private: |
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// an additional field beyond _sp and _pc: |
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intptr_t* _fp; // frame pointer |
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// The interpreter and adapters will extend the frame of the caller. |
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// Since oopMaps are based on the sp of the caller before extension |
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// we need to know that value. However in order to compute the address |
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// of the return address we need the real "raw" sp. Since sparc already |
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// uses sp() to mean "raw" sp and unextended_sp() to mean the caller's |
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// original sp we use that convention. |
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intptr_t* _unextended_sp; |
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void adjust_unextended_sp(); |
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intptr_t* ptr_at_addr(int offset) const { |
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return (intptr_t*) addr_at(offset); |
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} |
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#ifdef ASSERT |
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// Used in frame::sender_for_{interpreter,compiled}_frame |
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static void verify_deopt_original_pc( CompiledMethod* nm, intptr_t* unextended_sp); |
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#endif |
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public: |
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// Constructors |
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frame(intptr_t* sp, intptr_t* fp, address pc); |
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frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc); |
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frame(intptr_t* sp, intptr_t* fp); |
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void init(intptr_t* sp, intptr_t* fp, address pc); |
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// accessors for the instance variables |
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// Note: not necessarily the real 'frame pointer' (see real_fp) |
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intptr_t* fp() const { return _fp; } |
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inline address* sender_pc_addr() const; |
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// expression stack tos if we are nested in a java call |
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intptr_t* interpreter_frame_last_sp() const; |
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// helper to update a map with callee-saved RBP |
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static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr); |
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// deoptimization support |
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void interpreter_frame_set_last_sp(intptr_t* sp); |
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static jint interpreter_frame_expression_stack_direction() { return -1; } |
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#endif // CPU_AARCH64_VM_FRAME_AARCH64_HPP |