[issue11915] test_ctypes hangs in sandbox

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

If the child program is static, sandbox protects it using a tracing mechanism (based on ptrace with PTRACE_SYSCALL). Output is debug mode:

trace_main tracing: ./static
TRACE (pid=10377):trace_main: parent waiting for child (pid=10378) to signal
TRACE (pid=10378):trace_main: child setting up ...
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGSTOP(19)
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGCONT(18)
TRACE (pid=10377):trace_loop: >IDK:62TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
(...pre-exec...) = ...
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
TRACE (pid=10377):trace_loop: >IDK:11TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
(...pre-exec...) = ...
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
TRACE (pid=10377):trace_loop: >IDK:3TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
(...pre-exec...) = ...
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 0
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 0
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = -1 (errno: 38: Function not implemented)
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 0
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = -1 (errno: 38: Function not implemented)
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 36896768
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = -1 (errno: 38: Function not implemented)
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 36901248
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = -1 (errno: 38: Function not implemented)
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 0
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = -1 (errno: 38: Function not implemented)
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 37036416
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = -1 (errno: 38: Function not implemented)
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 37040128
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = -1 (errno: 38: Function not implemented)
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = 1264893952
TRACE (pid=10377):trace_child_signal: got sig SIGCHLD(17): code:CLD_TRAPPED(4) status:SIGTRAP(5)
 = -1 (errno: 38: Function not implemented)

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11915>
_______________________________________