/*

 * Copyright (c) 1999, 2012, 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.

 *

 */

#include "precompiled.hpp"

#include "code/codeCache.hpp"

#include "code/nmethod.hpp"

#include "runtime/frame.hpp"

#include "runtime/init.hpp"

#include "runtime/os.hpp"

#include "utilities/debug.hpp"

#include "utilities/top.hpp"

#ifndef PRODUCT

extern "C" void findpc(int x);

void pd_ps(frame f) {

  intptr_t* sp = f.sp();

  intptr_t* prev_sp = sp - 1;

  intptr_t *pc = NULL;

  intptr_t *next_pc = NULL;

  int count = 0;

  tty->print("register window backtrace from %#x:\n", sp);

  while (sp != NULL && ((intptr_t)sp & 7) == 0 && sp > prev_sp && sp < prev_sp+1000) {

    pc      = next_pc;

    next_pc = (intptr_t*) sp[I7->sp_offset_in_saved_window()];

    tty->print("[%d] sp=%#x pc=", count, sp);

    findpc((intptr_t)pc);

    if (WizardMode && Verbose) {

      // print register window contents also

      tty->print_cr("    L0..L7: {%#x %#x %#x %#x %#x %#x %#x %#x}",

                    sp[0+0],sp[0+1],sp[0+2],sp[0+3],

                    sp[0+4],sp[0+5],sp[0+6],sp[0+7]);

      tty->print_cr("    I0..I7: {%#x %#x %#x %#x %#x %#x %#x %#x}",

                    sp[8+0],sp[8+1],sp[8+2],sp[8+3],

                    sp[8+4],sp[8+5],sp[8+6],sp[8+7]);

      // (and print stack frame contents too??)

      CodeBlob *b = CodeCache::find_blob((address) pc);

      if (b != NULL) {

        if (b->is_nmethod()) {

          Method* m = ((nmethod*)b)->method();

          int nlocals = m->max_locals();

          int nparams  = m->size_of_parameters();

          tty->print_cr("compiled java method (locals = %d, params = %d)", nlocals, nparams);

        }

      }

    }

    prev_sp = sp;

    sp = (intptr_t *)sp[FP->sp_offset_in_saved_window()];

    sp = (intptr_t *)((intptr_t)sp + STACK_BIAS);

    count += 1;

  }

  if (sp != NULL)

    tty->print("[%d] sp=%#x [bogus sp!]", count, sp);

}

#endif // PRODUCT