I have a Python-powered DSL which I execute through exec(). This DSL includes a native function calls through CFFI.
I'm getting stack overflow (SO, you made it ungooglable!) crash when calling a native function which is just 2 C calls deep, with only a handful of uint16_ts allocated on a stack in each C function. Python application is a tkinter GUI that calls the DSL by timer (master.after(1000, self.tick)) event, which might take a good portion of stack itself.
There are NO recursive calls here.
OS X 10.12.3, Python 3.6.0rc1 (v3.6.0rc1:29a273eee9a5, Dec 6 2016, 16:24:13), CFFI 1.9.1
I'm aware of resource.setrlimit(resource.RLIMIT_STACK, (resource.RLIM_INFINITY, resource.RLIM_INFINITY)), but it requires a superuser privilege. I believe this is not needed, as it's not normal to only have a stack remaining for two function calls.
Could CFFI or exec() be limiting the stack size for the callee?
Function being called from DSL:
ffi_builder.cdef('''
//...
int FooNode_SetProperty(struct FooNode *pThis, const char *szPropertyName, int nValue);
''')
def set_channel(node, channel):
node.SetProperty(b'channel', channel)
exec invocation code:
self._globals = {
'__builtins__': __builtins__,
# https://docs.python.org/3/library/functions.html#eval "If the globals dictionary is present and lacks
# ‘__builtins__’, the current globals are copied into globals before expression is parsed."
'run': {
'duration': 60 * MICROS,
'success': None
},
'set_channel': set_channel,
'turn_off': turn_off,
'turn_on': turn_on,
'finish': finish,
# 6 more functions here
}
exec(event_text, self._globals, {})
Apple report piece:
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Application Specific Information:
[35633] stack overflow
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00000001003bfdd6 __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fffe03dc787 pthread_kill + 90
2 libsystem_c.dylib 0x00007fffe02564bb __abort + 140
3 libsystem_c.dylib 0x00007fffe0256d7e __stack_chk_fail + 205
4 libmush_real.dylib 0x0000000104c4d714 send_counters_report_request + 532
(this thread really ends here, nothing else in Apple report)
