ggsn: generate coredump and exit upon SIGABRT received
Previous code relied on abort() switching sigaction to SIG_FDL +
retriggering SIGABRT in case the signal handler returns, which would
then generate the coredump + terminate the process.
However, if a SIGABRT is received from somewhere else (kill -SIGABRT),
then the process would print the talloc report and continue running,
which is not desired.
Change-Id: I7acfdfe5020320d853cba98b5add7479f8aaaf39
Fixes: OS#4865
diff --git a/ggsn/ggsn_main.c b/ggsn/ggsn_main.c
index d9fb4e6..d19b359 100644
--- a/ggsn/ggsn_main.c
+++ b/ggsn/ggsn_main.c
@@ -71,6 +71,17 @@
end = 1;
break;
case SIGABRT:
+ /* in case of abort, we want to obtain a talloc report and
+ * then run default SIGABRT handler, who will generate coredump
+ * and abort the process. abort() should do this for us after we
+ * return, but program wouldn't exit if an external SIGABRT is
+ * received.
+ */
+ talloc_report(tall_vty_ctx, stderr);
+ talloc_report_full(tall_ggsn_ctx, stderr);
+ signal(SIGABRT, SIG_DFL);
+ raise(SIGABRT);
+ break;
case SIGUSR1:
talloc_report(tall_vty_ctx, stderr);
talloc_report_full(tall_ggsn_ctx, stderr);