/*

 * Copyright 2007, 2008, 2009, 2010 Red Hat, Inc.

 * 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.

 *

 *

 */

#include "incls/_precompiled.incl"

#include "incls/_frame_zero.cpp.incl"

#ifdef ASSERT

void RegisterMap::check_location_valid() {

  ShouldNotCallThis();

}

#endif

bool frame::is_interpreted_frame() const {

  return zeroframe()->is_interpreter_frame();

}

bool frame::is_fake_stub_frame() const {

  return zeroframe()->is_fake_stub_frame();

}

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

  assert(zeroframe()->is_entry_frame(), "wrong type of frame");

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

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

  assert(entry_frame_call_wrapper()->anchor()->last_Java_sp() == sender_sp(),

         "sender should be next Java frame");

  map->clear();

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

  return frame(zeroframe()->next(), sender_sp());

}

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

  assert(zeroframe()->is_interpreter_frame() ||

         zeroframe()->is_shark_frame() ||

         zeroframe()->is_fake_stub_frame(), "wrong type of frame");

  return frame(zeroframe()->next(), sender_sp());

}

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

  // Default is not to follow arguments; the various

  // sender_for_xxx methods update this accordingly.

  map->set_include_argument_oops(false);

  if (is_entry_frame())

    return sender_for_entry_frame(map);

  else

    return sender_for_nonentry_frame(map);

}

#ifdef CC_INTERP

BasicObjectLock* frame::interpreter_frame_monitor_begin() const {

  return get_interpreterState()->monitor_base();

}

BasicObjectLock* frame::interpreter_frame_monitor_end() const {

  return (BasicObjectLock*) get_interpreterState()->stack_base();

}

#endif // CC_INTERP

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

  // We borrow this call to set the thread pointer in the interpreter

  // state; the hook to set up deoptimized frames isn't supplied it.

  assert(pc == NULL, "should be");

  get_interpreterState()->set_thread((JavaThread *) thread);

}

bool frame::safe_for_sender(JavaThread *thread) {

  ShouldNotCallThis();

}

void frame::pd_gc_epilog() {

}

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

  ShouldNotCallThis();

}

BasicType frame::interpreter_frame_result(oop* oop_result,

                                          jvalue* value_result) {

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

  methodOop method = interpreter_frame_method();

  BasicType type = method->result_type();

  intptr_t* tos_addr = (intptr_t *) interpreter_frame_tos_address();

  oop obj;

  switch (type) {

  case T_VOID:

    break;

  case T_BOOLEAN:

    value_result->z = *(jboolean *) tos_addr;

    break;

  case T_BYTE:

    value_result->b = *(jbyte *) tos_addr;

    break;

  case T_CHAR:

    value_result->c = *(jchar *) tos_addr;

    break;

  case T_SHORT:

    value_result->s = *(jshort *) 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_OBJECT:

  case T_ARRAY:

    if (method->is_native()) {

      obj = get_interpreterState()->oop_temp();

    }

    else {

      oop* obj_p = (oop *) tos_addr;

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

    }

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

    *oop_result = obj;

    break;

  default:

    ShouldNotReachHere();

  }

  return type;

}

int frame::frame_size(RegisterMap* map) const {

#ifdef PRODUCT

  ShouldNotCallThis();

#else

  return 0; // make javaVFrame::print_value work

#endif // PRODUCT

}

intptr_t* frame::interpreter_frame_tos_at(jint offset) const {

  int index = (Interpreter::expr_offset_in_bytes(offset) / wordSize);

  return &interpreter_frame_tos_address()[index];

}

void frame::zero_print_on_error(int           frame_index,

                                outputStream* st,

                                char*         buf,

                                int           buflen) const {

  // Divide the buffer between the field and the value

  buflen >>= 1;

  char *fieldbuf = buf;

  char *valuebuf = buf + buflen;

  // Print each word of the frame

  for (intptr_t *addr = sp(); addr <= fp(); addr++) {

    int offset = fp() - addr;

    // Fill in default values, then try and improve them

    snprintf(fieldbuf, buflen, "word[%d]", offset);

    snprintf(valuebuf, buflen, PTR_FORMAT, *addr);

    zeroframe()->identify_word(frame_index, offset, fieldbuf, valuebuf, buflen);

    fieldbuf[buflen - 1] = '\0';

    valuebuf[buflen - 1] = '\0';

    // Print the result

    st->print_cr(" " PTR_FORMAT ": %-21s = %s", addr, fieldbuf, valuebuf);

  }

}

void ZeroFrame::identify_word(int   frame_index,

                              int   offset,

                              char* fieldbuf,

                              char* valuebuf,

                              int   buflen) const {

  switch (offset) {

  case next_frame_off:

    strncpy(fieldbuf, "next_frame", buflen);

    break;

  case frame_type_off:

    strncpy(fieldbuf, "frame_type", buflen);

    if (is_entry_frame())

      strncpy(valuebuf, "ENTRY_FRAME", buflen);

    else if (is_interpreter_frame())

      strncpy(valuebuf, "INTERPRETER_FRAME", buflen);

    else if (is_shark_frame())

      strncpy(valuebuf, "SHARK_FRAME", buflen);

    else if (is_fake_stub_frame())

      strncpy(valuebuf, "FAKE_STUB_FRAME", buflen);

    break;

  default:

    if (is_entry_frame()) {

      as_entry_frame()->identify_word(

        frame_index, offset, fieldbuf, valuebuf, buflen);

    }

    else if (is_interpreter_frame()) {

      as_interpreter_frame()->identify_word(

        frame_index, offset, fieldbuf, valuebuf, buflen);

    }

    else if (is_shark_frame()) {

      as_shark_frame()->identify_word(

        frame_index, offset, fieldbuf, valuebuf, buflen);

    }

    else if (is_fake_stub_frame()) {

      as_fake_stub_frame()->identify_word(

        frame_index, offset, fieldbuf, valuebuf, buflen);

    }

  }

}

void EntryFrame::identify_word(int   frame_index,

                               int   offset,

                               char* fieldbuf,

                               char* valuebuf,

                               int   buflen) const {

  switch (offset) {

  case call_wrapper_off:

    strncpy(fieldbuf, "call_wrapper", buflen);

    break;

  default:

    snprintf(fieldbuf, buflen, "local[%d]", offset - 3);

  }

}

void InterpreterFrame::identify_word(int   frame_index,

                                     int   offset,

                                     char* fieldbuf,

                                     char* valuebuf,

                                     int   buflen) const {

  interpreterState istate = interpreter_state();

  bool is_valid = istate->self_link() == istate;

  intptr_t *addr = addr_of_word(offset);

  // Fixed part

  if (addr >= (intptr_t *) istate) {

    const char *field = istate->name_of_field_at_address((address) addr);

    if (field) {

      if (is_valid && !strcmp(field, "_method")) {

        istate->method()->name_and_sig_as_C_string(valuebuf, buflen);

      }

      else if (is_valid && !strcmp(field, "_bcp") && istate->bcp()) {

        snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",

                 (intptr_t) istate->bcp(),

                 istate->method()->bci_from(istate->bcp()));

      }

      snprintf(fieldbuf, buflen, "%sistate->%s",

               field[strlen(field) - 1] == ')' ? "(": "", field);

    }

    else if (addr == (intptr_t *) istate) {

      strncpy(fieldbuf, "(vtable for istate)", buflen);

    }

    return;

  }

  // Variable part

  if (!is_valid)

    return;

  // JNI stuff

  if (istate->method()->is_native() && addr < istate->stack_base()) {

    address hA = istate->method()->signature_handler();

    if (hA != NULL) {

      if (hA != (address) InterpreterRuntime::slow_signature_handler) {

        InterpreterRuntime::SignatureHandler *handler =

          InterpreterRuntime::SignatureHandler::from_handlerAddr(hA);

        intptr_t *params = istate->stack_base() - handler->argument_count();

        if (addr >= params) {

          int param = addr - params;

          const char *desc = "";

          if (param == 0)

            desc = " (JNIEnv)";

          else if (param == 1) {

            if (istate->method()->is_static())

              desc = " (mirror)";

            else

              desc = " (this)";

          }

          snprintf(fieldbuf, buflen, "parameter[%d]%s", param, desc);

          return;

        }

        for (int i = 0; i < handler->argument_count(); i++) {

          if (params[i] == (intptr_t) addr) {

            snprintf(fieldbuf, buflen, "unboxed parameter[%d]", i);

            return;

          }

        }

      }

    }

    return;

  }

  // Monitors and stack

  identify_vp_word(frame_index, addr,

                   (intptr_t *) istate->monitor_base(),

                   istate->stack_base(),

                   fieldbuf, buflen);

}

void SharkFrame::identify_word(int   frame_index,

                               int   offset,

                               char* fieldbuf,

                               char* valuebuf,

                               int   buflen) const {

  // Fixed part

  switch (offset) {

  case pc_off:

    strncpy(fieldbuf, "pc", buflen);

    if (method()->is_oop()) {

      nmethod *code = method()->code();

      if (code && code->pc_desc_at(pc())) {

        SimpleScopeDesc ssd(code, pc());

        snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",

                 (intptr_t) pc(), ssd.bci());

      }

    }

    return;

  case unextended_sp_off:

    strncpy(fieldbuf, "unextended_sp", buflen);

    return;

  case method_off:

    strncpy(fieldbuf, "method", buflen);

    if (method()->is_oop()) {

      method()->name_and_sig_as_C_string(valuebuf, buflen);

    }

    return;

  case oop_tmp_off:

    strncpy(fieldbuf, "oop_tmp", buflen);

    return;

  }

  // Variable part

  if (method()->is_oop()) {

    identify_vp_word(frame_index, addr_of_word(offset),

                     addr_of_word(header_words + 1),

                     unextended_sp() + method()->max_stack(),

                     fieldbuf, buflen);

  }

}

void ZeroFrame::identify_vp_word(int       frame_index,

                                 intptr_t* addr,

                                 intptr_t* monitor_base,

                                 intptr_t* stack_base,

                                 char*     fieldbuf,

                                 int       buflen) const {

  // Monitors

  if (addr >= stack_base && addr < monitor_base) {

    int monitor_size = frame::interpreter_frame_monitor_size();

    int last_index = (monitor_base - stack_base) / monitor_size - 1;

    int index = last_index - (addr - stack_base) / monitor_size;

    intptr_t monitor = (intptr_t) (

      (BasicObjectLock *) monitor_base - 1 - index);

    intptr_t offset = (intptr_t) addr - monitor;

    if (offset == BasicObjectLock::obj_offset_in_bytes())

      snprintf(fieldbuf, buflen, "monitor[%d]->_obj", index);

    else if (offset ==  BasicObjectLock::lock_offset_in_bytes())

      snprintf(fieldbuf, buflen, "monitor[%d]->_lock", index);

    return;

  }

  // Expression stack

  if (addr < stack_base) {

    snprintf(fieldbuf, buflen, "%s[%d]",

             frame_index == 0 ? "stack_word" : "local",

             (int) (stack_base - addr - 1));

    return;

  }

}