| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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_X86_VM_FRAME_X86_HPP |
| #define CPU_X86_VM_FRAME_X86_HPP |
| |
| #include "runtime/synchronizer.hpp" |
| #include "utilities/top.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 ] \ |
| // ... | monitor block size |
| // [monitors ] / |
| // [monitor block size ] |
| // [byte code index/pointr] = bcx() bcx_offset |
| // [pointer to locals ] = locals() locals_offset |
| // [constant pool cache ] = cache() cache_offset |
| // [methodData ] = mdp() mdx_offset |
| // [Method* ] = method() method_offset |
| // [last sp ] = last_sp() last_sp_offset |
| // [old stack pointer ] (sender_sp) sender_sp_offset |
| // [old frame pointer ] <- fp = link() |
| // [return pc ] |
| // [oop temp ] (only for native calls) |
| // [locals and parameters ] |
| // <- sender sp |
| // ------------------------------ Asm interpreter ---------------------------------------- |
| |
| // ------------------------------ C++ interpreter ---------------------------------------- |
| // |
| // Layout of C++ interpreter frame: (While executing in BytecodeInterpreter::run) |
| // |
| // <- SP (current esp/rsp) |
| // [local variables ] BytecodeInterpreter::run local variables |
| // ... BytecodeInterpreter::run local variables |
| // [local variables ] BytecodeInterpreter::run local variables |
| // [old frame pointer ] fp [ BytecodeInterpreter::run's ebp/rbp ] |
| // [return pc ] (return to frame manager) |
| // [interpreter_state* ] (arg to BytecodeInterpreter::run) -------------- |
| // [expression stack ] <- last_Java_sp | |
| // [... ] * <- interpreter_state.stack | |
| // [expression stack ] * <- interpreter_state.stack_base | |
| // [monitors ] \ | |
| // ... | monitor block size | |
| // [monitors ] / <- interpreter_state.monitor_base | |
| // [struct interpretState ] <-----------------------------------------| |
| // [return pc ] (return to callee of frame manager [1] |
| // [locals and parameters ] |
| // <- sender sp |
| |
| // [1] When the C++ interpreter calls a new method it returns to the frame |
| // manager which allocates a new frame on the stack. In that case there |
| // is no real callee of this newly allocated frame. The frame manager is |
| // aware of the additional frame(s) and will pop them as nested calls |
| // complete. However, to make it look good in the debugger the frame |
| // manager actually installs a dummy pc pointing to RecursiveInterpreterActivation |
| // with a fake interpreter_state* parameter to make it easy to debug |
| // nested calls. |
| |
| // Note that contrary to the layout for the assembly interpreter the |
| // expression stack allocated for the C++ interpreter is full sized. |
| // However this is not as bad as it seems as the interpreter frame_manager |
| // will truncate the unused space on successive method calls. |
| // |
| // ------------------------------ C++ interpreter ---------------------------------------- |
| |
| public: |
| enum { |
| pc_return_offset = 0, |
| // All frames |
| link_offset = 0, |
| return_addr_offset = 1, |
| // non-interpreter frames |
| sender_sp_offset = 2, |
| |
| #ifndef CC_INTERP |
| |
| // Interpreter frames |
| interpreter_frame_result_handler_offset = 3, // for native calls only |
| interpreter_frame_oop_temp_offset = 2, // 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_mdx_offset = interpreter_frame_method_offset - 1, |
| interpreter_frame_cache_offset = interpreter_frame_mdx_offset - 1, |
| interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1, |
| interpreter_frame_bcx_offset = interpreter_frame_locals_offset - 1, |
| interpreter_frame_initial_sp_offset = interpreter_frame_bcx_offset - 1, |
| |
| interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset, |
| interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset, |
| |
| #endif // CC_INTERP |
| |
| // Entry frames |
| #ifdef AMD64 |
| #ifdef _WIN64 |
| entry_frame_after_call_words = 28, |
| entry_frame_call_wrapper_offset = 2, |
| |
| arg_reg_save_area_bytes = 32, // Register argument save area |
| #else |
| entry_frame_after_call_words = 13, |
| entry_frame_call_wrapper_offset = -6, |
| |
| arg_reg_save_area_bytes = 0, |
| #endif // _WIN64 |
| #else |
| entry_frame_call_wrapper_offset = 2, |
| #endif // AMD64 |
| |
| // Native frames |
| |
| native_frame_initial_param_offset = 2 |
| |
| }; |
| |
| 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: |
| intptr_t* _fp; // frame pointer |
| // 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. |
| |
| intptr_t* _unextended_sp; |
| void adjust_unextended_sp(); |
| |
| 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(nmethod* nm, intptr_t* unextended_sp); |
| #endif |
| |
| 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* fp); |
| |
| void init(intptr_t* sp, intptr_t* fp, address pc); |
| |
| // accessors for the instance variables |
| // Note: not necessarily the real 'frame pointer' (see real_fp) |
| intptr_t* fp() const { return _fp; } |
| |
| inline address* sender_pc_addr() const; |
| |
| // return address of param, zero origin index. |
| inline address* native_param_addr(int idx) const; |
| |
| // expression stack tos if we are nested in a java call |
| intptr_t* interpreter_frame_last_sp() const; |
| |
| // helper to update a map with callee-saved RBP |
| static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr); |
| |
| #ifndef CC_INTERP |
| // deoptimization support |
| void interpreter_frame_set_last_sp(intptr_t* sp); |
| #endif // CC_INTERP |
| |
| #ifdef CC_INTERP |
| inline interpreterState get_interpreterState() const; |
| #endif // CC_INTERP |
| |
| #endif // CPU_X86_VM_FRAME_X86_HPP |
