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Vincent Pelletier
neoppod
Commits
d36093ef
Commit
d36093ef
authored
Aug 21, 2012
by
Julien Muchembled
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Example of neo/debug.py script starting a debugger on RTMIN+2 signal
parent
07efb0ca
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d36093ef
"""Example of script starting a debugger on RTMIN+2 signal
The pdb is launched in a separate thread in order not to trigger timeouts.
The prompt is accessible through network in case that the process is daemonized:
$ socat READLINE TCP:127.0.0.1:54930
> neo/debug.py(63)pdb()
-> app # this is Application instance
(Pdb) app
<neo.master.app.Application object at 0x1fc9750>
"""
if
1
:
import
socket
,
sys
,
threading
#from neo.lib.debug import getPdb
from
pdb
import
Pdb
as
getPdb
class
Socket
(
object
):
def
__init__
(
self
,
socket
):
self
.
_socket
=
socket
self
.
_buf
=
''
def
write
(
self
,
data
):
self
.
_socket
.
send
(
data
)
def
readline
(
self
):
recv
=
self
.
_socket
.
recv
data
=
self
.
_buf
while
True
:
i
=
1
+
data
.
find
(
'
\
n
'
)
if
i
:
self
.
_buf
=
data
[
i
:]
return
data
[:
i
]
d
=
recv
(
4096
)
data
+=
d
if
not
d
:
self
.
_buf
=
''
return
data
def
flush
(
self
):
pass
def
closed
(
self
):
self
.
_socket
.
setblocking
(
0
)
try
:
self
.
_socket
.
recv
(
0
)
return
True
except
socket
.
error
,
(
err
,
_
):
if
err
!=
errno
.
EAGAIN
:
raise
self
.
_socket
.
setblocking
(
1
)
return
False
def
pdb
(
app
):
s
=
socket
.
socket
(
socket
.
AF_INET
,
socket
.
SOCK_STREAM
)
try
:
s
.
bind
((
'127.0.0.1'
,
0
))
s
.
listen
(
0
)
print
'Listening to %u'
%
s
.
getsockname
()[
1
]
_socket
=
Socket
(
s
.
accept
()[
0
])
finally
:
s
.
close
()
getPdb
(
stdin
=
_socket
,
stdout
=
_socket
).
set_trace
()
app
# this is Application instance
f
=
sys
.
_getframe
(
3
)
try
:
while
f
.
f_code
.
co_name
!=
'run'
or
\
f
.
f_locals
.
get
(
'self'
).
__class__
.
__name__
!=
'Application'
:
f
=
f
.
f_back
threading
.
Thread
(
target
=
pdb
,
args
=
(
f
.
f_locals
[
'self'
],)).
start
()
finally
:
del
f
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