From dfe9aa91564c1bf2a23b5589a5db42f9da5d29b5 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Tue, 19 Nov 2019 17:17:05 -0300 Subject: support: Add support_process_state_wait It allows parent process to wait for child state using a polling strategy over procfs on Linux. The polling is used over ptrace to avoid the need to handle signals on the target pid and to handle some system specific limitation (such as YAMA). The polling has some limitations, such as resource consumption due the procfs read in a loop and the lack of synchronization after the state is obtained. The interface idea is to simplify some sleep synchronization waitid tests and is to reduce timeouts by replacing arbitrary waits. --- support/Makefile | 3 +++ 1 file changed, 3 insertions(+) (limited to 'support/Makefile') diff --git a/support/Makefile b/support/Makefile index a0304e6..6e38b87 100644 --- a/support/Makefile +++ b/support/Makefile @@ -56,6 +56,7 @@ libsupport-routines = \ support_format_hostent \ support_format_netent \ support_isolate_in_subprocess \ + support_process_state \ support_ptrace \ support_openpty \ support_paths \ @@ -95,6 +96,7 @@ libsupport-routines = \ xfopen \ xfork \ xftruncate \ + xgetline \ xgetsockname \ xlisten \ xlseek \ @@ -224,6 +226,7 @@ tests = \ tst-support_capture_subprocess \ tst-support_descriptors \ tst-support_format_dns_packet \ + tst-support-process_state \ tst-support_quote_blob \ tst-support_quote_string \ tst-support_record_failure \ -- cgit v1.1