| /* |
| * Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2014, Red Hat Inc. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef CPU_AARCH64_FRAME_AARCH64_HPP |
| #define CPU_AARCH64_FRAME_AARCH64_HPP |
| |
| // A frame represents a physical stack frame (an activation). Frames can be |
| // C or Java frames, and the Java frames can be interpreted or compiled. |
| // In contrast, vframes represent source-level activations, so that one physical frame |
| // can correspond to multiple source level frames because of inlining. |
| // A frame is comprised of {pc, fp, sp} |
| // ------------------------------ Asm interpreter ---------------------------------------- |
| // Layout of asm interpreter frame: |
| // [expression stack ] * <- sp |
| |
| // [monitors[0] ] \ |
| // ... | monitor block size = k |
| // [monitors[k-1] ] / |
| // [frame initial esp ] ( == &monitors[0], initially here) initial_sp_offset |
| // [byte code index/pointr] = bcx() bcx_offset |
| |
| // [pointer to locals ] = locals() locals_offset |
| // [constant pool cache ] = cache() cache_offset |
| |
| // [klass of method ] = mirror() mirror_offset |
| // [extended SP ] extended_sp offset |
| |
| // [methodData ] = mdp() mdx_offset |
| // [Method ] = method() method_offset |
| |
| // [last esp ] = last_sp() last_sp_offset |
| // [sender's SP ] (sender_sp) sender_sp_offset |
| |
| // [old frame pointer ] <- fp = link() |
| // [return pc ] |
| |
| // [last sp ] |
| // [oop temp ] (only for native calls) |
| |
| // [padding ] (to preserve machine SP alignment) |
| // [locals and parameters ] |
| // <- sender sp |
| // ------------------------------ Asm interpreter ---------------------------------------- |
| |
| public: |
| enum { |
| pc_return_offset = 0, |
| // All frames |
| link_offset = 0, |
| return_addr_offset = 1, |
| sender_sp_offset = 2, |
| |
| // Interpreter frames |
| interpreter_frame_oop_temp_offset = 3, // for native calls only |
| |
| interpreter_frame_sender_sp_offset = -1, |
| // outgoing sp before a call to an invoked method |
| interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1, |
| interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1, |
| interpreter_frame_mdp_offset = interpreter_frame_method_offset - 1, |
| interpreter_frame_extended_sp_offset = interpreter_frame_mdp_offset - 1, |
| interpreter_frame_mirror_offset = interpreter_frame_extended_sp_offset - 1, |
| interpreter_frame_cache_offset = interpreter_frame_mirror_offset - 1, |
| interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1, |
| interpreter_frame_bcp_offset = interpreter_frame_locals_offset - 1, |
| interpreter_frame_initial_sp_offset = interpreter_frame_bcp_offset - 1, |
| |
| interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset, |
| interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset, |
| |
| // Entry frames |
| // n.b. these values are determined by the layout defined in |
| // stubGenerator for the Java call stub |
| entry_frame_after_call_words = 27, |
| entry_frame_call_wrapper_offset = -8, |
| |
| // we don't need a save area |
| arg_reg_save_area_bytes = 0, |
| |
| // size, in words, of frame metadata (e.g. pc and link) |
| metadata_words = sender_sp_offset, |
| // size, in words, of metadata at frame bottom, i.e. it is not part of the |
| // caller/callee overlap |
| metadata_words_at_bottom = metadata_words, |
| // size, in words, of frame metadata at the frame top, i.e. it is located |
| // between a callee frame and its stack arguments, where it is part |
| // of the caller/callee overlap |
| metadata_words_at_top = 0, |
| // in bytes |
| frame_alignment = 16, |
| // size, in words, of maximum shift in frame position due to alignment |
| align_wiggle = 1 |
| }; |
| |
| intptr_t ptr_at(int offset) const { |
| return *ptr_at_addr(offset); |
| } |
| |
| void ptr_at_put(int offset, intptr_t value) { |
| *ptr_at_addr(offset) = value; |
| } |
| |
| private: |
| // an additional field beyond _sp and _pc: |
| union { |
| intptr_t* _fp; // frame pointer |
| int _offset_fp; // relative frame pointer for use in stack-chunk frames |
| }; |
| // The interpreter and adapters will extend the frame of the caller. |
| // Since oopMaps are based on the sp of the caller before extension |
| // we need to know that value. However in order to compute the address |
| // of the return address we need the real "raw" sp. Since sparc already |
| // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's |
| // original sp we use that convention. |
| |
| union { |
| intptr_t* _unextended_sp; |
| int _offset_unextended_sp; // for use in stack-chunk frames |
| }; |
| |
| void adjust_unextended_sp() NOT_DEBUG_RETURN; |
| |
| // true means _sp value is correct and we can use it to get the sender's sp |
| // of the compiled frame, otherwise, _sp value may be invalid and we can use |
| // _fp to get the sender's sp if PreserveFramePointer is enabled. |
| bool _sp_is_trusted; |
| |
| intptr_t* ptr_at_addr(int offset) const { |
| return (intptr_t*) addr_at(offset); |
| } |
| |
| #ifdef ASSERT |
| // Used in frame::sender_for_{interpreter,compiled}_frame |
| static void verify_deopt_original_pc( CompiledMethod* nm, intptr_t* unextended_sp); |
| #endif |
| |
| const ImmutableOopMap* get_oop_map() const; |
| |
| public: |
| // Constructors |
| |
| frame(intptr_t* sp, intptr_t* fp, address pc); |
| |
| frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc); |
| |
| frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc, CodeBlob* cb, bool allow_cb_null = false); |
| // used for fast frame construction by continuations |
| frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc, CodeBlob* cb, const ImmutableOopMap* oop_map, bool on_heap); |
| |
| frame(intptr_t* sp, intptr_t* fp); |
| |
| void init(intptr_t* sp, intptr_t* fp, address pc); |
| void setup(address pc); |
| |
| // accessors for the instance variables |
| // Note: not necessarily the real 'frame pointer' (see real_fp) |
| intptr_t* fp() const { assert_absolute(); return _fp; } |
| void set_fp(intptr_t* newfp) { _fp = newfp; } |
| int offset_fp() const { assert_offset(); return _offset_fp; } |
| void set_offset_fp(int value) { assert_on_heap(); _offset_fp = value; } |
| |
| inline address* sender_pc_addr() const; |
| inline address sender_pc_maybe_signed() const; |
| |
| // expression stack tos if we are nested in a java call |
| intptr_t* interpreter_frame_last_sp() const; |
| |
| void interpreter_frame_set_extended_sp(intptr_t* sp); |
| |
| template <typename RegisterMapT> |
| static void update_map_with_saved_link(RegisterMapT* map, intptr_t** link_addr); |
| |
| // deoptimization support |
| void interpreter_frame_set_last_sp(intptr_t* sp); |
| |
| static jint interpreter_frame_expression_stack_direction() { return -1; } |
| |
| // returns the sending frame, without applying any barriers |
| inline frame sender_raw(RegisterMap* map) const; |
| |
| void set_sp_is_trusted() { _sp_is_trusted = true; } |
| |
| #endif // CPU_AARCH64_FRAME_AARCH64_HPP |
