警告：这很长，我无法理解任何人为此做志愿者，但我真的需要解决这个问题。我将尝试提供尽可能多的信息，我非常感谢我应该去哪里调试这个。我明白当你看不到整个消息来源时它会变得无比复杂，所以我道歉，但是这个错误已经把我推倒了2天了。
此在运行时仅发生大约1/7次（每次都不能重复）
(gdb) run GUI.py Starting program: /usr/bin/python2.7 GUI.py [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". [New Thread 0x7ffff4947700 (LWP 4868)] [New Thread 0x7fffef655700 (LWP 4870)] [New Thread 0x7fffeee54700 (LWP 4872)] [Thread 0x7fffeee54700 (LWP 4872) exited] [New Thread 0x7fffeee54700 (LWP 4874)] Program received signal SIGSEGV, Segmentation fault. 0x00007ffff68b416d in ?? () from /usr/lib64/libtk8.6.so (gdb) info threads Id Target Id Frame 5 Thread 0x7fffeee54700 (LWP 4874) "python2.7" 0x00007ffff781c0af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 3 Thread 0x7fffef655700 (LWP 4870) "python2.7" 0x00007ffff754006d in poll () from /lib64/libc.so.6 2 Thread 0x7ffff4947700 (LWP 4868) "python2.7" 0x00007ffff7541e43 in select () from /lib64/libc.so.6 * 1 Thread 0x7ffff7fd1700 (LWP 4867) "python2.7" 0x00007ffff68b416d in ?? () from /usr/lib64/libtk8.6.so (gdb) l 1 ../sysdeps/x86_64/crti.S: No such file or directory. (gdb) backtrace #0 0x00007ffff68b416d in ?? () from /usr/lib64/libtk8.6.so #1 0x00007ffff6553ce6 in TclServiceIdle () from /usr/lib64/libtcl8.6.so #2 0x00007ffff6534d0d in Tcl_DoOneEvent () from /usr/lib64/libtcl8.6.so #3 0x00007ffff6b4ede0 in ?? () from /usr/lib64/python2.7/lib-dynload/_tkinter.so #4 0x00007ffff7af5bc3 in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0 #5 0x00007ffff7afbae6 in PyEval_EvalCodeEx () from /usr/lib64/libpython2.7.so.1.0 #6 0x00007ffff7af55d3 in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0 #7 0x00007ffff7af732c in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0 #8 0x00007ffff7afbae6 in PyEval_EvalCodeEx () from /usr/lib64/libpython2.7.so.1.0 #9 0x00007ffff7b28802 in PyEval_EvalCode () from /usr/lib64/libpython2.7.so.1.0 #10 0x00007ffff7b34f6d in ?? () from /usr/lib64/libpython2.7.so.1.0 #11 0x00007ffff7ac3005 in PyRun_FileExFlags () from /usr/lib64/libpython2.7.so.1.0 #12 0x00007ffff7ac3be4 in PyRun_SimpleFileExFlags () from /usr/lib64/libpython2.7.so.1.0 #13 0x00007ffff7acb813 in Py_Main () from /usr/lib64/libpython2.7.so.1.0 #14 0x00007ffff7483be5 in __libc_start_main () from /lib64/libc.so.6 #15 0x0000000000400791 in _start ()
我的代码是2,500多行，所以我尽可能地减少了解释发生了什么。我省略了init部分，因此请忽略来自剪切的任何语法错误。
class SSH:
# Function call can specify if stdout/err is to be omitted
def sshRunCommand(self, command, print_stdout=True, print_stderr=True):
# Appends command to always change to the home directory first
x = "cd /home/" + self.username + "/; " + command
# Locally output an terminal-esque command look-a-like
if print_stdout:
print self.username + "@" + self.payloadd + ":" + x
# Execute the command storing input/output to local variables
try:
(stdin, stdout, stderr) = self.client.exec_command(x)
except Exception as e:
tkMessageBox.showerror("Error", e)
return ([], [])
return (stdout, stderr)
class GUI:
def __init__(self):
self.ssh_session = SSH()
def uploadThreadStart(self):
global q
# Code here just SFTPs file, never causes error
# If user wants to load image into local registry, do so.
try:
if tkMessageBox.askyesno("Load Image?",
"Would you like to load the image on remote PC?"):
q.put("sftp.load")
self.ssh_session.sshRunCommand(
"docker load --input " +
os.path.basename(self.m_file.name),
True, True)
print "Successfully loaded image " + self.m_file.name
q.put("sftp.complete")
except Exception as e:
tkMessageBox.showerror("Error", e)
# Function call for actually uploading Container
def uploadDockerImagePopupWindowButtonPressed(self):
global sftp_thread
global q
# Start the thread
if self.m_file:
q.put("sftp.start")
sftp_thread = Thread(
target=self.uploadThreadStart,
args=())
sftp_thread.daemon = True
sftp_thread.start()
return
这很简单：GUI是主线程，如果按下按钮，则会启动一个新线程，其中输入字段中的文件（例如/home/user/file.tar）被分配给self.m_file并且sftp结束了。 Paramiko似乎总是产生一个单独的线程来做这件事（来自gdb输出）。然后我提示使用Paramiko运行exec_command，如果他们想要“加载”他们刚刚转移的文件。我总是以cd /home/user/开头。我被引导相信，因为sshRunCommand中的打印语句没有显示，分段错误发生在exec_command.附近
这里有什么明显的东西或者是为了解决这个问题吗？多线程似乎是一种竞争条件，但我非常不确定。如果你读过这本书，甚至是略读它，我非常感谢你的时间。