tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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CellHeader.py (872B)

      1 # This Source Code Form is subject to the terms of the Mozilla Public
      2 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
      3 # You can obtain one at http://mozilla.org/MPL/2.0/.
      4 
      5 import gdb
      6 
      7 
      8 def get_header_ptr(value, ptr_t):
      9    # Return the pointer stored in Cell::header_ for subclasses of
     10    # TenuredCellWithNonGCPointer and CellWithTenuredGCPointer.
     11    return value["header_"]["value_"].cast(ptr_t)
     12 
     13 
     14 def get_header_length_and_flags(value, cache):
     15    # Return the length and flags values for subclasses of
     16    # CellWithLengthAndFlags.
     17    flags = value["header_"]["value_"].cast(cache.uintptr_t)
     18    try:
     19        length = value["length_"]
     20    except gdb.error:
     21        # If we couldn't fetch the length directly, it must be stored
     22        # within `flags`.
     23        length = flags >> 32
     24        flags = flags % 2**32
     25    return length, flags