Change in osmo-pcu[master]: main: generate coredump and exit upon SIGABRT received

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pespin gerrit-no-reply at lists.osmocom.org
Wed Nov 25 16:45:18 UTC 2020


pespin has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-pcu/+/21340 )


Change subject: main: generate coredump and exit upon SIGABRT received
......................................................................

main: 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 (killall -SIGABRT
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: I8f02925eedd8855bb58555df20b443f79d5c6da8
Fixes: OS#4865
---
M src/pcu_main.cpp
1 file changed, 9 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-pcu refs/changes/40/21340/1

diff --git a/src/pcu_main.cpp b/src/pcu_main.cpp
index 8ec9048..2138fd9 100644
--- a/src/pcu_main.cpp
+++ b/src/pcu_main.cpp
@@ -203,9 +203,16 @@
 		quit = 1;
 		break;
 	case SIGABRT:
-		/* in case of abort, we want to obtain a talloc report
-		 * and then return to the caller, who will abort the process
+		/* 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_full(tall_pcu_ctx, stderr);
+		signal(SIGABRT, SIG_DFL);
+		raise(SIGABRT);
+		break;
 	case SIGUSR1:
 	case SIGUSR2:
 		talloc_report_full(tall_pcu_ctx, stderr);

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Gerrit-Project: osmo-pcu
Gerrit-Branch: master
Gerrit-Change-Id: I8f02925eedd8855bb58555df20b443f79d5c6da8
Gerrit-Change-Number: 21340
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <pespin at sysmocom.de>
Gerrit-MessageType: newchange
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