From: Chen Jingpiao <chenjingpiao@gmail.com>
Date: Thu, 3 May 2018 13:00:38 +0000 (+0800)
Subject: trace_event: add a new event
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6a56ba6d95bb9f39396ef8c7cdda21bddc336294;p=strace

trace_event: add a new event

Prepare for seccomp-assisted syscall filtering.

* strace.c (next_event): Capture PTRACE_EVENT_SECCOMP event.
(dispatch_event): Handle PTRACE_EVENT_SECCOMP event.
* trace_event.h (enum trace_event) <TE_SECCOMP>: New enumeration entity.
---

diff --git a/strace.c b/strace.c
index cd04b989..440bd087 100644
--- a/strace.c
+++ b/strace.c
@@ -2405,6 +2405,8 @@ next_event(int *pstatus, siginfo_t *si)
 		return TE_STOP_BEFORE_EXECVE;
 	case PTRACE_EVENT_EXIT:
 		return TE_STOP_BEFORE_EXIT;
+	case PTRACE_EVENT_SECCOMP:
+		return TE_SECCOMP;
 	default:
 		return TE_RESTART;
 	}
@@ -2451,6 +2453,9 @@ dispatch_event(enum trace_event ret, int *pstatus, siginfo_t *si)
 	case TE_RESTART:
 		break;
 
+	case TE_SECCOMP:
+		break;
+
 	case TE_SYSCALL_STOP:
 		if (trace_syscall(current_tcp, &restart_sig) < 0) {
 			/*
diff --git a/trace_event.h b/trace_event.h
index 38883c81..edc36a7c 100644
--- a/trace_event.h
+++ b/trace_event.h
@@ -86,6 +86,11 @@ enum trace_event {
 	 * Restart the tracee with signal 0.
 	 */
 	TE_STOP_BEFORE_EXIT,
+
+	/*
+	 * SECCOMP_RET_TRACE rule is triggered.
+	 */
+	TE_SECCOMP,
 };
 
 #endif /* !STRACE_TRACE_EVENT_H */