From: Michael Jeanson <mjeanson@efficios.com>
Date: Mon, 3 Jun 2019 19:25:32 +0000 (-0400)
Subject: Fix: namespace our gettid wrapper
X-Git-Tag: v2.9.6~8
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=5c8ef1fbd44e36f57dbf0e1e877634ae8004dacf;p=lttng-ust.git

Fix: namespace our gettid wrapper

Since glibc 2.30, a gettid wrapper was added that conflicts with our
static declaration. Namespace our wrapper so there is no conflict,
we'll add support for the glibc provided wrapper in a further commit.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/include/lttng/ust-tid.h b/include/lttng/ust-tid.h
index e669d7e7..e637718a 100644
--- a/include/lttng/ust-tid.h
+++ b/include/lttng/ust-tid.h
@@ -31,23 +31,25 @@
 #include <syscall.h>
 #endif
 
-#if defined(_syscall0)
-_syscall0(pid_t, gettid)
-#elif defined(__NR_gettid)
+#if defined(__NR_gettid)
+
 #include <unistd.h>
-static inline pid_t gettid(void)
+static inline pid_t lttng_gettid(void)
 {
 	return syscall(__NR_gettid);
 }
+
 #else
+
 #include <sys/types.h>
 #include <unistd.h>
 
 /* Fall-back on getpid for tid if not available. */
-static inline pid_t gettid(void)
+static inline pid_t lttng_gettid(void)
 {
 	return getpid();
 }
+
 #endif
 
 #endif /* _LTTNG_UST_TID_H */
diff --git a/include/usterr-signal-safe.h b/include/usterr-signal-safe.h
index 1df5ada0..d987c1f0 100644
--- a/include/usterr-signal-safe.h
+++ b/include/usterr-signal-safe.h
@@ -95,7 +95,7 @@ do {									\
 	do {					\
 		sigsafe_print_err(UST_STR_COMPONENT "[%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" UST_XSTR(__LINE__) ")\n", \
 		(long) getpid(),		\
-		(long) gettid(),		\
+		(long) lttng_gettid(),		\
 		## args, __func__);		\
 	} while(0)
 
diff --git a/liblttng-ust/lttng-context-vtid.c b/liblttng-ust/lttng-context-vtid.c
index f28e470a..2f721fa0 100644
--- a/liblttng-ust/lttng-context-vtid.c
+++ b/liblttng-ust/lttng-context-vtid.c
@@ -62,7 +62,7 @@ void vtid_record(struct lttng_ctx_field *field,
 		 struct lttng_channel *chan)
 {
 	if (caa_unlikely(!URCU_TLS(cached_vtid)))
-		URCU_TLS(cached_vtid) = gettid();
+		URCU_TLS(cached_vtid) = lttng_gettid();
 	lib_ring_buffer_align_ctx(ctx, lttng_alignof(URCU_TLS(cached_vtid)));
 	chan->ops->event_write(ctx, &URCU_TLS(cached_vtid),
 		sizeof(URCU_TLS(cached_vtid)));
@@ -73,7 +73,7 @@ void vtid_get_value(struct lttng_ctx_field *field,
 		struct lttng_ctx_value *value)
 {
 	if (caa_unlikely(!URCU_TLS(cached_vtid)))
-		URCU_TLS(cached_vtid) = gettid();
+		URCU_TLS(cached_vtid) = lttng_gettid();
 	value->u.s64 = URCU_TLS(cached_vtid);
 }