From: Jan Willeke <jan.willeke@harman.com>
Date: Thu, 16 Feb 2017 13:42:51 +0000 (+0100)
Subject: socketpair: extend syscall socketpair tracing information
X-Git-Tag: v2.10.0-rc1~22
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=771af27e31ba33049fa04033456f04e7d740ec66;p=lttng-modules.git

socketpair: extend syscall socketpair tracing information

Decode the socketpair vector pointer into two file descriptors.
This exposes the connected file descriptors to analyses.

As sockerpair is a sub syscall of socketcall in x86_32,
sockerpair override must be disabled for x86_32 and x86_compatmode

Signed-off-by: Jan Willeke <jan.willeke@harman.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/instrumentation/syscalls/headers/syscalls_pointers_override.h b/instrumentation/syscalls/headers/syscalls_pointers_override.h
index 6b12a562..8e4d4c7f 100644
--- a/instrumentation/syscalls/headers/syscalls_pointers_override.h
+++ b/instrumentation/syscalls/headers/syscalls_pointers_override.h
@@ -871,4 +871,20 @@ SC_LTTNG_TRACEPOINT_EVENT_CODE(epoll_pwait,
 )
 #endif /* defined(CONFIG_X86_32) || defined(CONFIG_X86_64) || defined(CONFIG_ARM64) || defined(CONFIG_ARM) */
 
+#if (defined(CONFIG_X86_64) && !defined(LTTNG_SC_COMPAT)) || defined(CONFIG_ARM64) || defined(CONFIG_ARM)
+#define OVERRIDE_32_socketpair
+#define OVERRIDE_64_socketpair
+SC_LTTNG_TRACEPOINT_EVENT(socketpair,
+	TP_PROTO(sc_exit(long ret,) int family, int type, int protocol, int *usockvec),
+	TP_ARGS(sc_exit(ret,) family, type, protocol, usockvec),
+	TP_FIELDS(
+		sc_exit(ctf_integer(long, ret, ret))
+		sc_in(ctf_integer(int, family, family))
+		sc_in(ctf_integer(int, type, type))
+		sc_in(ctf_integer(int, protocol, protocol))
+		sc_out(ctf_user_array(int, socket, usockvec, 2))
+	)
+)
+#endif /* (defined(CONFIG_X86_64) && !defined(LTTNG_SC_COMPAT)) || defined(CONFIG_ARM64) || defined(CONFIG_ARM) */
+
 #endif /* CREATE_SYSCALL_TABLE */
diff --git a/lttng-syscalls.c b/lttng-syscalls.c
index 080355f4..11f904af 100644
--- a/lttng-syscalls.c
+++ b/lttng-syscalls.c
@@ -157,6 +157,7 @@ struct user_msghdr;
 
 /* Hijack probe callback for compat system call enter */
 #define TP_PROBE_CB(_template)		&syscall_entry_probe
+#define LTTNG_SC_COMPAT
 #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
 	LTTNG_TRACEPOINT_EVENT(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
 		PARAMS(_fields))
@@ -188,6 +189,7 @@ struct user_msghdr;
 #undef TP_PROBE_CB
 #undef _TRACE_SYSCALLS_INTEGERS_H
 #undef _TRACE_SYSCALLS_POINTERS_H
+#undef LTTNG_SC_COMPAT
 
 #undef SC_ENTER
 
@@ -239,6 +241,7 @@ struct user_msghdr;
 
 /* Hijack probe callback for compat system call exit */
 #define TP_PROBE_CB(_template)		&syscall_exit_probe
+#define LTTNG_SC_COMPAT
 #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
 	LTTNG_TRACEPOINT_EVENT(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \
 		PARAMS(_fields))
@@ -270,6 +273,7 @@ struct user_msghdr;
 #undef TP_PROBE_CB
 #undef _TRACE_SYSCALLS_INTEGERS_H
 #undef _TRACE_SYSCALLS_POINTERS_H
+#undef LTTNG_SC_COMPAT
 
 #undef SC_EXIT