import gdb

class ExhaustiveBacktrace(gdb.Command):
  """Get full backtraces for all threads.

  Also gets full xbacktrace for the first thread.  This command
  assumes that the xbacktrace hook for backtrace has been disabled.

  """
  def __init__(self):
    super(ExhaustiveBacktrace, self).__init__("exhaustive-backtrace", gdb.COMMAND_STACK)

  def invoke(self, arg, from_tty):
    # Turn pagination off until we're done.
    pagination = ("State of pagination is on." == gdb.execute("show pagination", to_string=True))
    gdb.execute("set pagination off")

    initial_thread = gdb.selected_thread()
    gdb.execute("info threads")
    gdb.write("Full backtrace for main thread\n")
    gdb.execute("backtrace full")
    gdb.execute("xbacktrace full")
    threads = list(gdb.selected_inferior().threads())
    threads.remove(initial_thread)
    threads.reverse()
    for t in threads:
      gdb.write("Full backtrace for thread {}\n".format(t.num))
      t.switch()
      gdb.execute("backtrace full")

    # Turn pagination back on if it was on when we started.
    if pagination:
      gdb.execute("set pagination on")

ExhaustiveBacktrace()