From 3fbec7dc3645facd9e809cf161ba3435a377ce56 Mon Sep 17 00:00:00 2001
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Sat, 16 Jul 2016 12:18:32 -0400
Subject: [PATCH] Performance: define _LGPL_SOURCE in LGPL c files

Brings a performance gain of 55 ns/event on the ARM32 Cubietruck by
adding _LGPL_SOURCE to ring buffer clients.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
 liblttng-ust/lttng-clock.c                           | 1 +
 liblttng-ust/lttng-context-cpu-id.c                  | 1 +
 liblttng-ust/lttng-context-ip.c                      | 1 +
 liblttng-ust/lttng-context-perf-counters.c           | 1 +
 liblttng-ust/lttng-context-procname.c                | 1 +
 liblttng-ust/lttng-context-provider.c                | 1 +
 liblttng-ust/lttng-context-pthread-id.c              | 1 +
 liblttng-ust/lttng-context-vpid.c                    | 1 +
 liblttng-ust/lttng-context-vtid.c                    | 1 +
 liblttng-ust/lttng-context.c                         | 2 +-
 liblttng-ust/lttng-events.c                          | 1 +
 liblttng-ust/lttng-filter-interpreter.c              | 1 +
 liblttng-ust/lttng-filter-specialize.c               | 1 +
 liblttng-ust/lttng-filter.c                          | 1 +
 liblttng-ust/lttng-getcpu.c                          | 1 +
 liblttng-ust/lttng-probes.c                          | 1 +
 liblttng-ust/lttng-ring-buffer-client-discard-rt.c   | 1 +
 liblttng-ust/lttng-ring-buffer-client-discard.c      | 1 +
 liblttng-ust/lttng-ring-buffer-client-overwrite-rt.c | 1 +
 liblttng-ust/lttng-ring-buffer-client-overwrite.c    | 1 +
 liblttng-ust/lttng-ring-buffer-metadata-client.c     | 1 +
 liblttng-ust/lttng-ust-abi.c                         | 1 +
 liblttng-ust/lttng-ust-dynamic-type.c                | 1 +
 liblttng-ust/lttng-ust-elf.c                         | 1 +
 liblttng-ust/ust-core.c                              | 1 +
 libringbuffer/ring_buffer_backend.c                  | 1 +
 libringbuffer/ring_buffer_frontend.c                 | 1 +
 libringbuffer/shm.c                                  | 1 +
 libringbuffer/smp.c                                  | 1 +
 29 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/liblttng-ust/lttng-clock.c b/liblttng-ust/lttng-clock.c
index 4299bcde..b24ff37c 100644
--- a/liblttng-ust/lttng-clock.c
+++ b/liblttng-ust/lttng-clock.c
@@ -17,6 +17,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <error.h>
 #include <dlfcn.h>
 #include <stdlib.h>
diff --git a/liblttng-ust/lttng-context-cpu-id.c b/liblttng-ust/lttng-context-cpu-id.c
index 840cafe7..7cbf3cea 100644
--- a/liblttng-ust/lttng-context-cpu-id.c
+++ b/liblttng-ust/lttng-context-cpu-id.c
@@ -27,6 +27,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <sys/types.h>
 #include <unistd.h>
 #include <lttng/ust-events.h>
diff --git a/liblttng-ust/lttng-context-ip.c b/liblttng-ust/lttng-context-ip.c
index 84c73499..fb922954 100644
--- a/liblttng-ust/lttng-context-ip.c
+++ b/liblttng-ust/lttng-context-ip.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <sys/types.h>
 #include <unistd.h>
 #include <lttng/ust-events.h>
diff --git a/liblttng-ust/lttng-context-perf-counters.c b/liblttng-ust/lttng-context-perf-counters.c
index 7e87be94..a15417cc 100644
--- a/liblttng-ust/lttng-context-perf-counters.c
+++ b/liblttng-ust/lttng-context-perf-counters.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <sys/types.h>
 #include <unistd.h>
 #include <string.h>
diff --git a/liblttng-ust/lttng-context-procname.c b/liblttng-ust/lttng-context-procname.c
index 13461a68..b6e69501 100644
--- a/liblttng-ust/lttng-context-procname.c
+++ b/liblttng-ust/lttng-context-procname.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <lttng/ust-events.h>
 #include <lttng/ust-tracer.h>
 #include <lttng/ringbuffer-config.h>
diff --git a/liblttng-ust/lttng-context-provider.c b/liblttng-ust/lttng-context-provider.c
index 6c067e2f..c580891a 100644
--- a/liblttng-ust/lttng-context-provider.c
+++ b/liblttng-ust/lttng-context-provider.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <sys/types.h>
 #include <unistd.h>
 #include <lttng/ust-context-provider.h>
diff --git a/liblttng-ust/lttng-context-pthread-id.c b/liblttng-ust/lttng-context-pthread-id.c
index c2c21157..552100de 100644
--- a/liblttng-ust/lttng-context-pthread-id.c
+++ b/liblttng-ust/lttng-context-pthread-id.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <pthread.h>
 #include <lttng/ust-events.h>
 #include <lttng/ust-tracer.h>
diff --git a/liblttng-ust/lttng-context-vpid.c b/liblttng-ust/lttng-context-vpid.c
index 7d8091be..5e5ed145 100644
--- a/liblttng-ust/lttng-context-vpid.c
+++ b/liblttng-ust/lttng-context-vpid.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <sys/types.h>
 #include <unistd.h>
 #include <lttng/ust-events.h>
diff --git a/liblttng-ust/lttng-context-vtid.c b/liblttng-ust/lttng-context-vtid.c
index d1c73d8d..f28e470a 100644
--- a/liblttng-ust/lttng-context-vtid.c
+++ b/liblttng-ust/lttng-context-vtid.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <sys/types.h>
 #include <unistd.h>
 #include <lttng/ust-events.h>
diff --git a/liblttng-ust/lttng-context.c b/liblttng-ust/lttng-context.c
index 33a4cdd1..eeaaae43 100644
--- a/liblttng-ust/lttng-context.c
+++ b/liblttng-ust/lttng-context.c
@@ -20,7 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-
+#define _LGPL_SOURCE
 #include <lttng/ust-events.h>
 #include <lttng/ust-tracer.h>
 #include <lttng/ust-context-provider.h>
diff --git a/liblttng-ust/lttng-events.c b/liblttng-ust/lttng-events.c
index 64f70f92..4c0e1091 100644
--- a/liblttng-ust/lttng-events.c
+++ b/liblttng-ust/lttng-events.c
@@ -21,6 +21,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <stdio.h>
 #include <urcu/list.h>
 #include <urcu/hlist.h>
diff --git a/liblttng-ust/lttng-filter-interpreter.c b/liblttng-ust/lttng-filter-interpreter.c
index 3eee8e00..1ba06f8e 100644
--- a/liblttng-ust/lttng-filter-interpreter.c
+++ b/liblttng-ust/lttng-filter-interpreter.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <urcu-pointer.h>
 #include "lttng-filter.h"
 
diff --git a/liblttng-ust/lttng-filter-specialize.c b/liblttng-ust/lttng-filter-specialize.c
index dddb448e..d115585d 100644
--- a/liblttng-ust/lttng-filter-specialize.c
+++ b/liblttng-ust/lttng-filter-specialize.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include "lttng-filter.h"
 
 int lttng_filter_specialize_bytecode(struct bytecode_runtime *bytecode)
diff --git a/liblttng-ust/lttng-filter.c b/liblttng-ust/lttng-filter.c
index ee94a4cc..911f8e78 100644
--- a/liblttng-ust/lttng-filter.c
+++ b/liblttng-ust/lttng-filter.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <urcu/rculist.h>
 #include "lttng-filter.h"
 
diff --git a/liblttng-ust/lttng-getcpu.c b/liblttng-ust/lttng-getcpu.c
index 751affac..7b608ef9 100644
--- a/liblttng-ust/lttng-getcpu.c
+++ b/liblttng-ust/lttng-getcpu.c
@@ -17,6 +17,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <error.h>
 #include <dlfcn.h>
 #include <stdlib.h>
diff --git a/liblttng-ust/lttng-probes.c b/liblttng-ust/lttng-probes.c
index bba5cd34..5e2d2966 100644
--- a/liblttng-ust/lttng-probes.c
+++ b/liblttng-ust/lttng-probes.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <string.h>
 #include <errno.h>
 #include <urcu/list.h>
diff --git a/liblttng-ust/lttng-ring-buffer-client-discard-rt.c b/liblttng-ust/lttng-ring-buffer-client-discard-rt.c
index 301328f9..d57d5492 100644
--- a/liblttng-ust/lttng-ring-buffer-client-discard-rt.c
+++ b/liblttng-ust/lttng-ring-buffer-client-discard-rt.c
@@ -21,6 +21,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include "lttng-tracer.h"
 
 #define RING_BUFFER_MODE_TEMPLATE		RING_BUFFER_DISCARD
diff --git a/liblttng-ust/lttng-ring-buffer-client-discard.c b/liblttng-ust/lttng-ring-buffer-client-discard.c
index 2e469b7a..a5fcc807 100644
--- a/liblttng-ust/lttng-ring-buffer-client-discard.c
+++ b/liblttng-ust/lttng-ring-buffer-client-discard.c
@@ -21,6 +21,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include "lttng-tracer.h"
 
 #define RING_BUFFER_MODE_TEMPLATE		RING_BUFFER_DISCARD
diff --git a/liblttng-ust/lttng-ring-buffer-client-overwrite-rt.c b/liblttng-ust/lttng-ring-buffer-client-overwrite-rt.c
index b4c5fe57..1b4fff1b 100644
--- a/liblttng-ust/lttng-ring-buffer-client-overwrite-rt.c
+++ b/liblttng-ust/lttng-ring-buffer-client-overwrite-rt.c
@@ -21,6 +21,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include "lttng-tracer.h"
 
 #define RING_BUFFER_MODE_TEMPLATE		RING_BUFFER_OVERWRITE
diff --git a/liblttng-ust/lttng-ring-buffer-client-overwrite.c b/liblttng-ust/lttng-ring-buffer-client-overwrite.c
index e9cbc89d..5564e8e5 100644
--- a/liblttng-ust/lttng-ring-buffer-client-overwrite.c
+++ b/liblttng-ust/lttng-ring-buffer-client-overwrite.c
@@ -21,6 +21,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include "lttng-tracer.h"
 
 #define RING_BUFFER_MODE_TEMPLATE		RING_BUFFER_OVERWRITE
diff --git a/liblttng-ust/lttng-ring-buffer-metadata-client.c b/liblttng-ust/lttng-ring-buffer-metadata-client.c
index 126c0488..f14294a9 100644
--- a/liblttng-ust/lttng-ring-buffer-metadata-client.c
+++ b/liblttng-ust/lttng-ring-buffer-metadata-client.c
@@ -21,6 +21,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include "lttng-tracer.h"
 
 #define RING_BUFFER_MODE_TEMPLATE		RING_BUFFER_DISCARD
diff --git a/liblttng-ust/lttng-ust-abi.c b/liblttng-ust/lttng-ust-abi.c
index 9e4e5cd5..ac59d15a 100644
--- a/liblttng-ust/lttng-ust-abi.c
+++ b/liblttng-ust/lttng-ust-abi.c
@@ -37,6 +37,7 @@
  *     - Takes instrumentation source specific arguments.
  */
 
+#define _LGPL_SOURCE
 #include <lttng/ust-abi.h>
 #include <lttng/ust-error.h>
 #include <urcu/compiler.h>
diff --git a/liblttng-ust/lttng-ust-dynamic-type.c b/liblttng-ust/lttng-ust-dynamic-type.c
index 488cf815..d569e307 100644
--- a/liblttng-ust/lttng-ust-dynamic-type.c
+++ b/liblttng-ust/lttng-ust-dynamic-type.c
@@ -21,6 +21,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <stdio.h>
 #include <stdint.h>
 #include <stddef.h>
diff --git a/liblttng-ust/lttng-ust-elf.c b/liblttng-ust/lttng-ust-elf.c
index e5b8a08f..663699b7 100644
--- a/liblttng-ust/lttng-ust-elf.c
+++ b/liblttng-ust/lttng-ust-elf.c
@@ -17,6 +17,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <helper.h>
 #include <string.h>
 #include <lttng/align.h>
diff --git a/liblttng-ust/ust-core.c b/liblttng-ust/ust-core.c
index 6574f93b..5355f5c1 100644
--- a/liblttng-ust/ust-core.c
+++ b/liblttng-ust/ust-core.c
@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include <stdlib.h>
 #include <lttng/ust-events.h>
 #include <usterr-signal-safe.h>
diff --git a/libringbuffer/ring_buffer_backend.c b/libringbuffer/ring_buffer_backend.c
index 961f118a..3dca8627 100644
--- a/libringbuffer/ring_buffer_backend.c
+++ b/libringbuffer/ring_buffer_backend.c
@@ -19,6 +19,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <unistd.h>
 #include <urcu/arch.h>
 #include <limits.h>
diff --git a/libringbuffer/ring_buffer_frontend.c b/libringbuffer/ring_buffer_frontend.c
index bda0e1f4..14ae8eb3 100644
--- a/libringbuffer/ring_buffer_frontend.c
+++ b/libringbuffer/ring_buffer_frontend.c
@@ -52,6 +52,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <sys/types.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
diff --git a/libringbuffer/shm.c b/libringbuffer/shm.c
index 53b2b6ec..86e84b3f 100644
--- a/libringbuffer/shm.c
+++ b/libringbuffer/shm.c
@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
 #include "shm.h"
 #include <unistd.h>
 #include <fcntl.h>
diff --git a/libringbuffer/smp.c b/libringbuffer/smp.c
index ffc7a52a..9e7114be 100644
--- a/libringbuffer/smp.c
+++ b/libringbuffer/smp.c
@@ -19,6 +19,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <unistd.h>
 #include <pthread.h>
 #include "smp.h"
-- 
2.34.1