Re: [sr-dev] Troubleshooting segfault in shared memory

Hello, usually, the patter for using shared memory is this: - allocate the shared memory in main (mod_init) process, use a global parameter - use the shared memory in child processes, protected by a kamailio lock against concurrent access if you write to it as well Allocating shared memory in a child process and then accessing it from another child process will not work out of the box. Have a look to other modules with shared memory, e.g., carrierroute/cr_data.c or similar for an idea. Cheers, Henning -- Henning Westerholt - https://skalatan.de/blog/ Kamailio services - https://gilawa.com -----Original Message----- From: sr-dev <sr-dev-bounces(a)lists.kamailio.org> On Behalf Of Anthony Alba Sent: Thursday, August 26, 2021 4:55 AM To: sr-dev(a)lists.kamailio.org Subject: [sr-dev] Troubleshooting segfault in shared memory Hi sr-dev, I have a pointer from one child process A that is available to another child process B (this is a custom module I am developing). The object should have been allocated in shared memory by A using ser_malloc and friends and thus accessible from B. However B is encountering a segfault when accessing this object. Given a pointer how can I tell whether the memory it is pointing to is valid in all children, i.e, the target is in kamailio shared memory? Thanks Anthony Alba _______________________________________________ Kamailio (SER) - Development Mailing List sr-dev(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-dev