From: Michalis Pappas <michalis@unikraft.io>
Date: Tue, 16 Apr 2024 09:44:51 +0000 (+0200)
Subject: lib/posix-process: Add posix_thread parent
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=8eb6c29d545758d70bb381c8ad63ece9715b3256;p=unikraft%2Funikraft.git

lib/posix-process: Add posix_thread parent

Add a field to posix_thread to keep track of its parent. This is
populated during the creation of a posix_thread, and it is used
for deriving the parent's state in execve() / exit().

Signed-off-by: Michalis Pappas <michalis@unikraft.io>
Approved-by: Andrei Tatar <andrei@unikraft.io>
Reviewed-by: Sergiu Moga <sergiu@unikraft.io>
Reviewed-by: Andrei Tatar <andrei@unikraft.io>
GitHub-Closes: #1386
---

diff --git a/lib/posix-process/process.c b/lib/posix-process/process.c
index fbc85d6f9..f3aed6f40 100644
--- a/lib/posix-process/process.c
+++ b/lib/posix-process/process.c
@@ -33,6 +33,7 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
+
 #include <uk/config.h>
 #include <sys/types.h>
 #include <stddef.h>
@@ -250,6 +251,8 @@ int uk_posix_process_create(struct uk_alloc *a,
 			pprocess_release(orig_pprocess);
 	}
 
+	(*pthread)->parent = parent_pthread;
+
 	pprocess->parent = parent_pprocess;
 	if (parent_pprocess) {
 		uk_list_add_tail(&pprocess->child_list_entry,
diff --git a/lib/posix-process/process.h b/lib/posix-process/process.h
index 0e60fe371..fb313e059 100644
--- a/lib/posix-process/process.h
+++ b/lib/posix-process/process.h
@@ -70,6 +70,7 @@ struct posix_process {
 struct posix_thread {
 	pid_t tid;
 	struct posix_process *process;
+	struct posix_thread *parent;
 	struct uk_list_head thread_list_entry;
 	struct uk_thread *thread;
 	struct uk_alloc *_a;