/*

 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2012, 2015 SAP SE. 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.

 *

 */

#include "precompiled.hpp"

#include "interpreter/interpreter.hpp"

#include "memory/resourceArea.hpp"

#include "oops/markOop.hpp"

#include "oops/method.hpp"

#include "oops/oop.inline.hpp"

#include "runtime/frame.inline.hpp"

#include "runtime/handles.inline.hpp"

#include "runtime/javaCalls.hpp"

#include "runtime/monitorChunk.hpp"

#include "runtime/signature.hpp"

#include "runtime/stubCodeGenerator.hpp"

#include "runtime/stubRoutines.hpp"

#ifdef COMPILER1

#include "c1/c1_Runtime1.hpp"

#include "runtime/vframeArray.hpp"

#endif

#ifdef ASSERT

void RegisterMap::check_location_valid() {

}

#endif // ASSERT

bool frame::safe_for_sender(JavaThread *thread) {

  bool safe = false;

  address   cursp = (address)sp();

  address   curfp = (address)fp();

  if ((cursp != NULL && curfp != NULL &&

      (cursp <= thread->stack_base() && cursp >= thread->stack_base() - thread->stack_size())) &&

      (curfp <= thread->stack_base() && curfp >= thread->stack_base() - thread->stack_size())) {

      safe = true;

  }

  return safe;

}

bool frame::is_interpreted_frame() const  {

  return Interpreter::contains(pc());

}

frame frame::sender_for_entry_frame(RegisterMap *map) const {

  assert(map != NULL, "map must be set");

  // Java frame called from C; skip all C frames and return top C

  // frame of that chunk as the sender.

  JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();

  assert(!entry_frame_is_first(), "next Java fp must be non zero");

  assert(jfa->last_Java_sp() > _sp, "must be above this frame on stack");

  map->clear();

  assert(map->include_argument_oops(), "should be set by clear");

  if (jfa->last_Java_pc() != NULL) {

    frame fr(jfa->last_Java_sp(), jfa->last_Java_pc());

    return fr;

  }

  // Last_java_pc is not set, if we come here from compiled code. The

  // constructor retrieves the PC from the stack.

  frame fr(jfa->last_Java_sp());

  return fr;

}

frame frame::sender_for_interpreter_frame(RegisterMap *map) const {

  // Pass callers initial_caller_sp as unextended_sp.

  return frame(sender_sp(), sender_pc(), (intptr_t*)get_ijava_state()->sender_sp);

}

frame frame::sender_for_compiled_frame(RegisterMap *map) const {

  assert(map != NULL, "map must be set");

  // Frame owned by compiler.

  address pc = *compiled_sender_pc_addr(_cb);

  frame caller(compiled_sender_sp(_cb), pc);

  // Now adjust the map.

  // Get the rest.

  if (map->update_map()) {

    // Tell GC to use argument oopmaps for some runtime stubs that need it.

    map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread()));

    if (_cb->oop_maps() != NULL) {

      OopMapSet::update_register_map(this, map);

    }

  }

  return caller;

}

intptr_t* frame::compiled_sender_sp(CodeBlob* cb) const {

  return sender_sp();

}

address* frame::compiled_sender_pc_addr(CodeBlob* cb) const {

  return sender_pc_addr();

}

frame frame::sender(RegisterMap* map) const {

  // Default is we do have to follow them. The sender_for_xxx will

  // update it accordingly.

  map->set_include_argument_oops(false);

  if (is_entry_frame())       return sender_for_entry_frame(map);

  if (is_interpreted_frame()) return sender_for_interpreter_frame(map);

  assert(_cb == CodeCache::find_blob(pc()),"Must be the same");

  if (_cb != NULL) {

    return sender_for_compiled_frame(map);

  }

  // Must be native-compiled frame, i.e. the marshaling code for native

  // methods that exists in the core system.

  return frame(sender_sp(), sender_pc());

}

void frame::patch_pc(Thread* thread, address pc) {

  if (TracePcPatching) {

    tty->print_cr("patch_pc at address " PTR_FORMAT " [" PTR_FORMAT " -> " PTR_FORMAT "]",

                  p2i(&((address*) _sp)[-1]), p2i(((address*) _sp)[-1]), p2i(pc));

  }

  own_abi()->lr = (uint64_t)pc;

  _cb = CodeCache::find_blob(pc);

  if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {

    address orig = (((nmethod*)_cb)->get_original_pc(this));

    assert(orig == _pc, "expected original to be stored before patching");

    _deopt_state = is_deoptimized;

    // Leave _pc as is.

  } else {

    _deopt_state = not_deoptimized;

    _pc = pc;

  }

}

bool frame::is_interpreted_frame_valid(JavaThread* thread) const {

  // Is there anything to do?

  assert(is_interpreted_frame(), "Not an interpreted frame");

  return true;

}

BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) {

  assert(is_interpreted_frame(), "interpreted frame expected");

  Method* method = interpreter_frame_method();

  BasicType type = method->result_type();

  if (method->is_native()) {

    // Prior to calling into the runtime to notify the method exit the possible

    // result value is saved into the interpreter frame.

    address lresult = (address)&(get_ijava_state()->lresult);

    address fresult = (address)&(get_ijava_state()->fresult);

    switch (method->result_type()) {

      case T_OBJECT:

      case T_ARRAY: {

        oop* obj_p = *(oop**)lresult;

        oop obj = (obj_p == NULL) ? (oop)NULL : *obj_p;

        assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");

        *oop_result = obj;

        break;

      }

      // We use std/stfd to store the values.

      case T_BOOLEAN : value_result->z = (jboolean) *(unsigned long*)lresult; break;

      case T_INT     : value_result->i = (jint)     *(long*)lresult;          break;

      case T_CHAR    : value_result->c = (jchar)    *(unsigned long*)lresult; break;

      case T_SHORT   : value_result->s = (jshort)   *(long*)lresult;          break;

      case T_BYTE    : value_result->z = (jbyte)    *(long*)lresult;          break;

      case T_LONG    : value_result->j = (jlong)    *(long*)lresult;          break;

      case T_FLOAT   : value_result->f = (jfloat)   *(double*)fresult;        break;

      case T_DOUBLE  : value_result->d = (jdouble)  *(double*)fresult;        break;

      case T_VOID    : /* Nothing to do */ break;

      default        : ShouldNotReachHere();

    }

  } else {

    intptr_t* tos_addr = interpreter_frame_tos_address();

    switch (method->result_type()) {

      case T_OBJECT:

      case T_ARRAY: {

        oop obj = *(oop*)tos_addr;

        assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");

        *oop_result = obj;

      }

      case T_BOOLEAN : value_result->z = (jboolean) *(jint*)tos_addr; break;

      case T_BYTE    : value_result->b = (jbyte) *(jint*)tos_addr; break;

      case T_CHAR    : value_result->c = (jchar) *(jint*)tos_addr; break;

      case T_SHORT   : value_result->s = (jshort) *(jint*)tos_addr; break;

      case T_INT     : value_result->i = *(jint*)tos_addr; break;

      case T_LONG    : value_result->j = *(jlong*)tos_addr; break;

      case T_FLOAT   : value_result->f = *(jfloat*)tos_addr; break;

      case T_DOUBLE  : value_result->d = *(jdouble*)tos_addr; break;

      case T_VOID    : /* Nothing to do */ break;

      default        : ShouldNotReachHere();

    }

  }

  return type;

}

#ifndef PRODUCT

void frame::describe_pd(FrameValues& values, int frame_no) {

  if (is_interpreted_frame()) {

#define DESCRIBE_ADDRESS(name) \

  values.describe(frame_no, (intptr_t*)&(get_ijava_state()->name), #name);

      DESCRIBE_ADDRESS(method);

      DESCRIBE_ADDRESS(locals);

      DESCRIBE_ADDRESS(monitors);

      DESCRIBE_ADDRESS(cpoolCache);

      DESCRIBE_ADDRESS(bcp);

      DESCRIBE_ADDRESS(esp);

      DESCRIBE_ADDRESS(mdx);

      DESCRIBE_ADDRESS(top_frame_sp);

      DESCRIBE_ADDRESS(sender_sp);

      DESCRIBE_ADDRESS(oop_tmp);

      DESCRIBE_ADDRESS(lresult);

      DESCRIBE_ADDRESS(fresult);

  }

}

#endif

intptr_t *frame::initial_deoptimization_info() {

  // unused... but returns fp() to minimize changes introduced by 7087445

  return fp();

}

#ifndef PRODUCT

// This is a generic constructor which is only used by pns() in debug.cpp.

frame::frame(void* sp, void* fp, void* pc) : _sp((intptr_t*)sp), _unextended_sp((intptr_t*)sp) {

  find_codeblob_and_set_pc_and_deopt_state((address)pc); // also sets _fp and adjusts _unextended_sp

}

#endif