/*

 * 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_VM_FRAME_AARCH64_INLINE_HPP

#define CPU_AARCH64_VM_FRAME_AARCH64_INLINE_HPP

#include "code/codeCache.hpp"

#include "code/vmreg.inline.hpp"

// Inline functions for AArch64 frames:

// Constructors:

inline frame::frame() {

  _pc = NULL;

  _sp = NULL;

  _unextended_sp = NULL;

  _fp = NULL;

  _cb = NULL;

  _deopt_state = unknown;

}

static int spin;

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

  intptr_t a = intptr_t(sp);

  intptr_t b = intptr_t(fp);

#ifndef PRODUCT

  if (fp)

    if (sp > fp || (fp - sp > 0x100000))

      for(;;)

        asm("nop");

#endif

  _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) {

  intptr_t a = intptr_t(sp);

  intptr_t b = intptr_t(fp);

#ifndef PRODUCT

  if (fp)

    if (sp > fp || (fp - sp > 0x100000))

      for(;;)

        asm("nop");

#endif

  _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) {

  intptr_t a = intptr_t(sp);

  intptr_t b = intptr_t(fp);

#ifndef PRODUCT

  if (fp)

    if (sp > fp || (fp - sp > 0x100000))

      for(;;)

        asm("nop");

#endif

  _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 specilaized frame constructor instead of this one.

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

  // value.

  // 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 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(); }

#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 constantPoolCacheOop* frame::interpreter_frame_cache_addr() const {

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

  return &(get_interpreterState()->_constants);

}

// Method

inline methodOop* 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_bcp_addr() const {

  return (intptr_t*)addr_at(interpreter_frame_bcp_offset);

}

inline intptr_t* frame::interpreter_frame_mdp_addr() const {

  return (intptr_t*)addr_at(interpreter_frame_mdp_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(r0->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(r0->as_VMReg());

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

  *result_adr = obj;

}

#endif // CPU_AARCH64_VM_FRAME_AARCH64_INLINE_HPP