cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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tcg.py (1469B)

      1# -*- coding: utf-8 -*-
      2#
      3# GDB debugging support, TCG status
      4#
      5# Copyright 2016 Linaro Ltd
      6#
      7# Authors:
      8#  Alex Bennée <alex.bennee@linaro.org>
      9#
     10# This work is licensed under the terms of the GNU GPL, version 2 or
     11# later.  See the COPYING file in the top-level directory.
     12
     13# 'qemu tcg-lock-status' -- display the TCG lock status across threads
     14
     15import gdb
     16
     17class TCGLockStatusCommand(gdb.Command):
     18    '''Display TCG Execution Status'''
     19    def __init__(self):
     20        gdb.Command.__init__(self, 'qemu tcg-lock-status', gdb.COMMAND_DATA,
     21                             gdb.COMPLETE_NONE)
     22
     23    def invoke(self, arg, from_tty):
     24        gdb.write("Thread, BQL (iothread_mutex), Replay, Blocked?\n")
     25        for thread in gdb.inferiors()[0].threads():
     26            thread.switch()
     27
     28            iothread = gdb.parse_and_eval("iothread_locked")
     29            replay = gdb.parse_and_eval("replay_locked")
     30
     31            frame = gdb.selected_frame()
     32            if frame.name() == "__lll_lock_wait":
     33                frame.older().select()
     34                mutex = gdb.parse_and_eval("mutex")
     35                owner = gdb.parse_and_eval("mutex->__data.__owner")
     36                blocked = ("__lll_lock_wait waiting on %s from %d" %
     37                           (mutex, owner))
     38            else:
     39                blocked = "not blocked"
     40
     41            gdb.write("%d/%d, %s, %s, %s\n" % (thread.num, thread.ptid[1],
     42                                               iothread, replay, blocked))