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 /*

  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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  * 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

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 #ifndef CPU_X86_VM_FRAME_X86_INLINE_HPP

 #define CPU_X86_VM_FRAME_X86_INLINE_HPP

 #include "code/codeCache.hpp"

 // Inline functions for Intel frames:

 // Constructors:

 inline frame::frame() {

   _pc = NULL;

   _sp = NULL;

   _unextended_sp = NULL;

   _fp = NULL;

   _cb = NULL;

   _deopt_state = unknown;

 }

 inline void frame::init(intptr_t* sp, intptr_t* fp, address pc) {

   _sp = sp;

   _unextended_sp = sp;

   _fp = fp;

   _pc = pc;

   assert(pc != NULL, "no pc?");

   _cb = CodeCache::find_blob(pc);

   adjust_unextended_sp();

   address original_pc = nmethod::get_deopt_original_pc(this);

   if (original_pc != NULL) {

     _pc = original_pc;

     _deopt_state = is_deoptimized;

   } else {

     _deopt_state = not_deoptimized;

   }

 }

 inline frame::frame(intptr_t* sp, intptr_t* fp, address pc) {

   init(sp, fp, pc);

 }

 inline frame::frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc) {

   _sp = sp;

   _unextended_sp = unextended_sp;

   _fp = fp;

   _pc = pc;

   assert(pc != NULL, "no pc?");

   _cb = CodeCache::find_blob(pc);

   adjust_unextended_sp();

   address original_pc = nmethod::get_deopt_original_pc(this);

   if (original_pc != NULL) {

     _pc = original_pc;

     assert(((nmethod*)_cb)->insts_contains(_pc), "original PC must be in nmethod");

     _deopt_state = is_deoptimized;

   } else {

     _deopt_state = not_deoptimized;

   }

 }

 inline frame::frame(intptr_t* sp, intptr_t* fp) {

   _sp = sp;

   _unextended_sp = sp;

   _fp = fp;

   _pc = (address)(sp[-1]);

   // Here's a sticky one. This constructor can be called via AsyncGetCallTrace

   // when last_Java_sp is non-null but the pc fetched is junk. If we are truly

   // unlucky the junk value could be to a zombied method and we'll die on the

   // find_blob call. This is also why we can have no asserts on the validity

   // of the pc we find here. AsyncGetCallTrace -> pd_get_top_frame_for_signal_handler

   // -> pd_last_frame should use a specialized version of pd_last_frame which could

   // call a specialized frame constructor instead of this one.

   // Then we could use the assert below. However this assert is of somewhat dubious

   // value.

   // UPDATE: this constructor is only used by trace_method_handle_stub() now.

   // assert(_pc != NULL, "no pc?");

   _cb = CodeCache::find_blob(_pc);

   adjust_unextended_sp();

   address original_pc = nmethod::get_deopt_original_pc(this);

   if (original_pc != NULL) {

     _pc = original_pc;

     _deopt_state = is_deoptimized;

   } else {

     _deopt_state = not_deoptimized;

   }

 }

 // Accessors

 inline bool frame::equal(frame other) const {

   bool ret =  sp() == other.sp()

               && unextended_sp() == other.unextended_sp()

               && fp() == other.fp()

               && pc() == other.pc();

   assert(!ret || ret && cb() == other.cb() && _deopt_state == other._deopt_state, "inconsistent construction");

   return ret;

 }

 // Return unique id for this frame. The id must have a value where we can distinguish

 // identity and younger/older relationship. NULL represents an invalid (incomparable)

 // frame.

 inline intptr_t* frame::id(void) const { return unextended_sp(); }

 // Relationals on frames based

 // Return true if the frame is younger (more recent activation) than the frame represented by id

 inline bool frame::is_younger(intptr_t* id) const { assert(this->id() != NULL && id != NULL, "NULL frame id");

                                                     return this->id() < id ; }

 // Return true if the frame is older (less recent activation) than the frame represented by id

 inline bool frame::is_older(intptr_t* id) const   { assert(this->id() != NULL && id != NULL, "NULL frame id");

                                                     return this->id() > id ; }

 inline intptr_t* frame::link() const              { return (intptr_t*) *(intptr_t **)addr_at(link_offset); }

 inline void      frame::set_link(intptr_t* addr)  { *(intptr_t **)addr_at(link_offset) = addr; }

 inline intptr_t* frame::unextended_sp() const     { return _unextended_sp; }

 // Return address:

 inline address* frame::sender_pc_addr()      const { return (address*) addr_at( return_addr_offset); }

 inline address  frame::sender_pc()           const { return *sender_pc_addr(); }

 // return address of param, zero origin index.

 inline address* frame::native_param_addr(int idx) const { return (address*) addr_at( native_frame_initial_param_offset+idx); }

 #ifdef CC_INTERP

 inline interpreterState frame::get_interpreterState() const {

   return ((interpreterState)addr_at( -((int)sizeof(BytecodeInterpreter))/wordSize ));

 }

 inline intptr_t*    frame::sender_sp()        const {

   // Hmm this seems awfully expensive QQQ, is this really called with interpreted frames?

   if (is_interpreted_frame()) {

     assert(false, "should never happen");

     return get_interpreterState()->sender_sp();

   } else {

     return            addr_at(sender_sp_offset);

   }

 }

 inline intptr_t** frame::interpreter_frame_locals_addr() const {

   assert(is_interpreted_frame(), "must be interpreted");

   return &(get_interpreterState()->_locals);

 }

 inline intptr_t* frame::interpreter_frame_bcx_addr() const {

   assert(is_interpreted_frame(), "must be interpreted");

   return (intptr_t*) &(get_interpreterState()->_bcp);

 }

 // Constant pool cache

 inline ConstantPoolCache** frame::interpreter_frame_cache_addr() const {

   assert(is_interpreted_frame(), "must be interpreted");

   return &(get_interpreterState()->_constants);

 }

 // Method

 inline Method** frame::interpreter_frame_method_addr() const {

   assert(is_interpreted_frame(), "must be interpreted");

   return &(get_interpreterState()->_method);

 }

 inline intptr_t* frame::interpreter_frame_mdx_addr() const {

   assert(is_interpreted_frame(), "must be interpreted");

   return (intptr_t*) &(get_interpreterState()->_mdx);

 }

 // top of expression stack

 inline intptr_t* frame::interpreter_frame_tos_address() const {

   assert(is_interpreted_frame(), "wrong frame type");

   return get_interpreterState()->_stack + 1;

 }

 #else /* asm interpreter */

 inline intptr_t*    frame::sender_sp()        const { return            addr_at(   sender_sp_offset); }

 inline intptr_t** frame::interpreter_frame_locals_addr() const {

   return (intptr_t**)addr_at(interpreter_frame_locals_offset);

 }

 inline intptr_t* frame::interpreter_frame_last_sp() const {

   return *(intptr_t**)addr_at(interpreter_frame_last_sp_offset);

 }

 inline intptr_t* frame::interpreter_frame_bcx_addr() const {

   return (intptr_t*)addr_at(interpreter_frame_bcx_offset);

 }

 inline intptr_t* frame::interpreter_frame_mdx_addr() const {

   return (intptr_t*)addr_at(interpreter_frame_mdx_offset);

 }

 // Constant pool cache

 inline ConstantPoolCache** frame::interpreter_frame_cache_addr() const {

   return (ConstantPoolCache**)addr_at(interpreter_frame_cache_offset);

 }

 // Method

 inline Method** frame::interpreter_frame_method_addr() const {

   return (Method**)addr_at(interpreter_frame_method_offset);

 }

 // top of expression stack

 inline intptr_t* frame::interpreter_frame_tos_address() const {

   intptr_t* last_sp = interpreter_frame_last_sp();

   if (last_sp == NULL) {

     return sp();

   } else {

     // sp() may have been extended or shrunk by an adapter.  At least

     // check that we don't fall behind the legal region.

     // For top deoptimized frame last_sp == interpreter_frame_monitor_end.

     assert(last_sp <= (intptr_t*) interpreter_frame_monitor_end(), "bad tos");

     return last_sp;

   }

 }

 inline oop* frame::interpreter_frame_temp_oop_addr() const {

   return (oop *)(fp() + interpreter_frame_oop_temp_offset);

 }

 #endif /* CC_INTERP */

 inline int frame::pd_oop_map_offset_adjustment() const {

   return 0;

 }

 inline int frame::interpreter_frame_monitor_size() {

   return BasicObjectLock::size();

 }

 // expression stack

 // (the max_stack arguments are used by the GC; see class FrameClosure)

 inline intptr_t* frame::interpreter_frame_expression_stack() const {

   intptr_t* monitor_end = (intptr_t*) interpreter_frame_monitor_end();

   return monitor_end-1;

 }

 inline jint frame::interpreter_frame_expression_stack_direction() { return -1; }

 // Entry frames

 inline JavaCallWrapper** frame::entry_frame_call_wrapper_addr() const {

  return (JavaCallWrapper**)addr_at(entry_frame_call_wrapper_offset);

 }

 // Compiled frames

 inline int frame::local_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors) {

   return (nof_args - local_index + (local_index < nof_args ? 1: -1));

 }

 inline int frame::monitor_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors) {

   return local_offset_for_compiler(local_index, nof_args, max_nof_locals, max_nof_monitors);

 }

 inline int frame::min_local_offset_for_compiler(int nof_args, int max_nof_locals, int max_nof_monitors) {

   return (nof_args - (max_nof_locals + max_nof_monitors*2) - 1);

 }

 inline bool frame::volatile_across_calls(Register reg) {

   return true;

 }

 inline oop frame::saved_oop_result(RegisterMap* map) const {

   oop* result_adr = (oop *)map->location(rax->as_VMReg());

   guarantee(result_adr != NULL, "bad register save location");

   return (*result_adr);

 }

 inline void frame::set_saved_oop_result(RegisterMap* map, oop obj) {

   oop* result_adr = (oop *)map->location(rax->as_VMReg());

   guarantee(result_adr != NULL, "bad register save location");

   *result_adr = obj;

 }

 #endif // CPU_X86_VM_FRAME_X86_INLINE_HPP