# Copyright 2011 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
#       copyright notice, this list of conditions and the following
#       disclaimer in the documentation and/or other materials provided
#       with the distribution.
#     * Neither the name of Google Inc. nor the names of its
#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# for py2/py3 compatibility
from __future__ import print_function

import re
import tempfile
import os
import subprocess
import time
import gdb

kSmiTag = 0
kSmiTagSize = 1
kSmiTagMask = (1 << kSmiTagSize) - 1


kHeapObjectTag = 1
kHeapObjectTagSize = 2
kHeapObjectTagMask = (1 << kHeapObjectTagSize) - 1


kFailureTag = 3
kFailureTagSize = 2
kFailureTagMask = (1 << kFailureTagSize) - 1


kSmiShiftSize32 = 0
kSmiValueSize32 = 31
kSmiShiftBits32 = kSmiTagSize + kSmiShiftSize32


kSmiShiftSize64 = 31
kSmiValueSize64 = 32
kSmiShiftBits64 = kSmiTagSize + kSmiShiftSize64


kAllBits = 0xFFFFFFFF
kTopBit32 = 0x80000000
kTopBit64 = 0x8000000000000000


t_u32 = gdb.lookup_type('unsigned int')
t_u64 = gdb.lookup_type('unsigned long long')


def has_smi_tag(v):
  return v & kSmiTagMask == kSmiTag