Python Binding Segfault.

[Pritchy96]

I'm trying to use Pine to connect to PCSX2, but the python bindings seem to be having issues. When I run the Python example, it exits with a segfault whenever I attempt to do anything with the created PCSX2Ipc object - read, write, even pine_get_error gives a segfault. I've gotten the C++ client example working as well as the rust bindings working just fine, so it does seem like a python specific issue.

PCSX2 logs a successful connection when running ipc = libipc.pine_pcsx2_new(); [ 740.1081] PINE: New client with FD 30 connected., and this stays until we try and do anything with the ipc, at which point it segfaults and pcsx2 logs [ 824.9942] PINE: Client disconnected..

I'm running on the latest commit on master for pine, PCSX2 v2.1.196, Python v3.12.7, running on Linux. I'll attempt to run this with the latest release of Pine, but that looks pretty outdated at this point. I'll keep debugging and report back any findings.

Cheers,
Tom

[caol64]

I encountered a similar issue. Explicitly defining argtypes and restype for each ctypes function resolved it.

import ctypes
import os
import platform
from ctypes import c_void_p, c_uint, c_ulong, c_char, c_bool


# we get the correct library extension per os
lib="libpine_c"
cur_os = platform.system()
if(cur_os == "Linux"):
    lib="libpine_c.so"
elif(cur_os == "Windows"):
    lib="libpine_c.dll"
elif(cur_os == "Darwin"):
    lib="libpine_c.dylib"


# we load the library, this will require it to be in the same folder
# refer to bindings/c to build the library.
libipc = ctypes.CDLL(os.path.join(os.path.dirname(os.path.abspath(__file__)),lib))

libipc.pine_pcsx2_new.restype = c_void_p

libipc.pine_read.argtypes = [c_void_p, c_uint, c_char, c_bool]
libipc.pine_read.restype = c_ulong

libipc.pine_get_error.argtypes = [c_void_p]
libipc.pine_get_error.restype = c_uint

libipc.pine_pcsx2_delete.argtypes = [c_void_p]
libipc.pine_pcsx2_delete.restype = None

ipc = libipc.pine_pcsx2_new()
value = libipc.pine_read(ipc, 0x00347D34, c_char(0), False)
print("Read:", value)
print("Error:", libipc.pine_get_error(ipc))
libipc.pine_pcsx2_delete(ipc)

[paulo101977]

libipc.pine_pcsx2_new.restype = c_void_p

libipc.pine_read.argtypes = [c_void_p, c_uint, c_char, c_bool]
libipc.pine_read.restype = c_ulong

libipc.pine_get_error.argtypes = [c_void_p]
libipc.pine_get_error.restype = c_uint

libipc.pine_pcsx2_delete.argtypes = [c_void_p]
libipc.pine_pcsx2_delete.restype = None

@caol64 This fixes an issue I was having accessing memory. An OS error.