--- old/src/hotspot/cpu/sparc/frame_sparc.hpp 2020-05-20 18:08:46.612185121 -0700 +++ /dev/null 2020-03-09 18:57:19.455001459 -0700 @@ -1,245 +0,0 @@ -/* - * Copyright (c) 1997, 2019, 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_SPARC_FRAME_SPARC_HPP -#define CPU_SPARC_FRAME_SPARC_HPP - -#include "runtime/synchronizer.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, sp, younger_sp} - - -// Layout of asm interpreter frame: -// -// 0xfffffff -// ...... -// [last extra incoming arg, (local # Nargs > 6 ? Nargs-1 : undef)] -// .. Note: incoming args are copied to local frame area upon entry -// [first extra incoming arg, (local # Nargs > 6 ? 6 : undef)] -// [6 words for C-arg storage (unused)] Are this and next one really needed? -// [C-aggregate-word (unused)] Yes, if want extra params to be in same place as C convention -// [16 words for register saving] <--- FP -// [interpreter_frame_vm_locals ] (see below) - -// Note: Llocals is always double-word aligned -// [first local i.e. local # 0] <-- Llocals -// ... -// [last local, i.e. local # Nlocals-1] - -// [monitors ] -// .... -// [monitors ] <-- Lmonitors (same as Llocals + 6*4 if none) -// (must be double-word aligned because -// monitor element size is constrained to -// doubleword) -// -// <-- Lesp (points 1 past TOS) -// [bottom word used for stack ] -// ... -// [top word used for stack] (first word of stack is double-word aligned) - -// [space for outgoing args (conservatively allocated as max_stack - 6 + interpreter_frame_extra_outgoing_argument_words)] -// [6 words for C-arg storage] -// [C-aggregate-word (unused)] -// [16 words for register saving] <--- SP -// ... -// 0x0000000 -// -// The in registers and local registers are preserved in a block at SP. -// -// The first six in registers (I0..I5) hold the first six locals. -// The locals are used as follows: -// Lesp first free element of expression stack -// (which grows towards __higher__ addresses) -// Lbcp is set to address of bytecode to execute -// It may at times (during GC) be an index instead. -// Lmethod the method being interpreted -// Llocals the base pointer for accessing the locals array -// (lower-numbered locals have lower addresses) -// Lmonitors the base pointer for accessing active monitors -// Lcache a saved pointer to the method's constant pool cache -// -// -// When calling out to another method, -// G5_method is set to method to call, G5_inline_cache_klass may be set, -// parameters are put in O registers, and also extra parameters -// must be cleverly copied from the top of stack to the outgoing param area in the frame, - -// All frames: - - public: - - enum { - // normal return address is 2 words past PC - pc_return_offset = 2 * BytesPerInstWord, - - // size of each block, in order of increasing address: - register_save_words = 16, - callee_aggregate_return_pointer_words = 0, - callee_register_argument_save_area_words = 6, - // memory_parameter_words = , - - // offset of each block, in order of increasing address: - // (note: callee_register_argument_save_area_words == Assembler::n_register_parameters) - register_save_words_sp_offset = 0, - callee_aggregate_return_pointer_sp_offset = register_save_words_sp_offset + register_save_words, - callee_register_argument_save_area_sp_offset = callee_aggregate_return_pointer_sp_offset + callee_aggregate_return_pointer_words, - memory_parameter_word_sp_offset = callee_register_argument_save_area_sp_offset + callee_register_argument_save_area_words, - varargs_offset = memory_parameter_word_sp_offset - }; - - private: - intptr_t* _younger_sp; // optional SP of callee (used to locate O7) - int _sp_adjustment_by_callee; // adjustment in words to SP by callee for making locals contiguous - - // Note: On SPARC, unlike Intel, the saved PC for a stack frame - // is stored at a __variable__ distance from that frame's SP. - // (In fact, it may be in the register save area of the callee frame, - // but that fact need not bother us.) Thus, we must store the - // address of that saved PC explicitly. On the other hand, SPARC - // stores the FP for a frame at a fixed offset from the frame's SP, - // so there is no need for a separate "frame::_fp" field. - - public: - // Accessors - - intptr_t* younger_sp() const { - assert(_younger_sp != NULL, "frame must possess a younger_sp"); - return _younger_sp; - } - - int callee_sp_adjustment() const { return _sp_adjustment_by_callee; } - void set_sp_adjustment_by_callee(int number_of_words) { _sp_adjustment_by_callee = number_of_words; } - - // Constructors - - // This constructor relies on the fact that the creator of a frame - // has flushed register windows which the frame will refer to, and - // that those register windows will not be reloaded until the frame is - // done reading and writing the stack. Moreover, if the "younger_sp" - // argument points into the register save area of the next younger - // frame (though it need not), the register window for that next - // younger frame must also stay flushed. (The caller is responsible - // for ensuring this.) - - frame(intptr_t* sp, intptr_t* younger_sp, bool younger_frame_adjusted_stack = false); - - // make a deficient frame which doesn't know where its PC is: - enum unpatchable_t { unpatchable }; - frame(intptr_t* sp, unpatchable_t, address pc = NULL, CodeBlob* cb = NULL); - - void init(intptr_t* sp, address pc, CodeBlob* cb); - - // Walk from sp outward looking for old_sp, and return old_sp's predecessor - // (i.e. return the sp from the frame where old_sp is the fp). - // Register windows are assumed to be flushed for the stack in question. - - static intptr_t* next_younger_sp_or_null(intptr_t* old_sp, intptr_t* sp); - - // Return true if sp is a younger sp in the stack described by valid_sp. - static bool is_valid_stack_pointer(intptr_t* valid_sp, intptr_t* sp); - - public: - // accessors for the instance variables - intptr_t* fp() const { return (intptr_t*) ((intptr_t)(sp()[FP->sp_offset_in_saved_window()]) + STACK_BIAS ); } - - // All frames - - intptr_t* fp_addr_at(int index) const { return &fp()[index]; } - intptr_t* sp_addr_at(int index) const { return &sp()[index]; } - intptr_t fp_at( int index) const { return *fp_addr_at(index); } - intptr_t sp_at( int index) const { return *sp_addr_at(index); } - - private: - inline address* I7_addr() const; - inline address* O7_addr() const; - - inline address* I0_addr() const; - inline address* O0_addr() const; - intptr_t* younger_sp_addr_at(int index) const { return &younger_sp()[index]; } - - public: - // access to SPARC arguments and argument registers - - // Assumes reg is an in/local register - intptr_t* register_addr(Register reg) const { - return sp_addr_at(reg->sp_offset_in_saved_window()); - } - - // Assumes reg is an out register - intptr_t* out_register_addr(Register reg) const { - return younger_sp_addr_at(reg->after_save()->sp_offset_in_saved_window()); - } - - - // Interpreter frames - - public: - // Asm interpreter - enum interpreter_frame_vm_locals { - // 2 words, also used to save float regs across calls to C - interpreter_frame_d_scratch_fp_offset = -2, - interpreter_frame_l_scratch_fp_offset = -4, - interpreter_frame_mirror_offset = -5, // keep interpreted method alive - - interpreter_frame_oop_temp_offset = -6, // for native calls only - interpreter_frame_vm_locals_fp_offset = -6, // should be same as above, and should be zero mod 8 - - interpreter_frame_vm_local_words = -interpreter_frame_vm_locals_fp_offset, - - - // interpreter frame set-up needs to save 2 extra words in outgoing param area - // for class and jnienv arguments for native stubs (see nativeStubGen_sparc.cpp_ - - interpreter_frame_extra_outgoing_argument_words = 2 - }; - - enum compiler_frame_fixed_locals { - compiler_frame_vm_locals_fp_offset = -2 - }; - - private: - ConstantPoolCache** interpreter_frame_cpoolcache_addr() const; - - // where Lmonitors is saved: - inline BasicObjectLock** interpreter_frame_monitors_addr() const; - inline intptr_t** interpreter_frame_esp_addr() const; - - inline void interpreter_frame_set_tos_address(intptr_t* x); - - // monitors: - - // next two fns read and write Lmonitors value, - private: - BasicObjectLock* interpreter_frame_monitors() const; - void interpreter_frame_set_monitors(BasicObjectLock* monitors); - public: - - static jint interpreter_frame_expression_stack_direction() { return -1; } - -#endif // CPU_SPARC_FRAME_SPARC_HPP