Require C++11 for building probe providers with C++ compiler

[lttng-ust.git] / liblttng-ust-ctl / ustctl.c

diff --git a/liblttng-ust-ctl/ustctl.c b/liblttng-ust-ctl/ustctl.c
index 8c38ffaf05dfc169aa82be957ded5d1e4d9aee63..ea5ab9dc4ed3ce29cd3dad50b1cc16c4bc32167a 100644 (file)
--- a/liblttng-ust-ctl/ustctl.c
+++ b/liblttng-ust-ctl/ustctl.c
@@ -17,14 +17,16 @@
  */
 
 #define _GNU_SOURCE
+#include <byteswap.h>
+#include <stdint.h>
 #include <string.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
 #include <lttng/ust-config.h>
 #include <lttng/ust-ctl.h>
 #include <lttng/ust-abi.h>
 #include <lttng/ust-events.h>
-#include <sys/mman.h>
-#include <byteswap.h>
-
 #include <usterr-signal-safe.h>
 #include <ust-comm.h>
 #include <helper.h>
@@ -77,8 +79,6 @@ extern void lttng_ring_buffer_client_discard_exit(void);
 extern void lttng_ring_buffer_client_discard_rt_exit(void);
 extern void lttng_ring_buffer_metadata_client_exit(void);
 
-volatile enum ust_loglevel ust_loglevel;
-
 int ustctl_release_handle(int sock, int handle)
 {
        struct ustcomm_ust_msg lum;
@@ -1590,6 +1590,19 @@ void ustctl_flush_buffer(struct ustctl_consumer_stream *stream,
                consumer_chan->chan->handle);
 }
 
+void ustctl_clear_buffer(struct ustctl_consumer_stream *stream)
+{
+       struct lttng_ust_lib_ring_buffer *buf;
+       struct ustctl_consumer_channel *consumer_chan;
+
+       assert(stream);
+       buf = stream->buf;
+       consumer_chan = stream->chan;
+       lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE,
+               consumer_chan->chan->handle);
+       lib_ring_buffer_clear_reader(buf, consumer_chan->chan->handle);
+}
+
 static
 struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb(
                struct lttng_ust_lib_ring_buffer *buf,
@@ -1841,7 +1854,8 @@ int ustctl_recv_reg_msg(int sock,
        *uint64_t_alignment = reg_msg.uint64_t_alignment;
        *long_alignment = reg_msg.long_alignment;
        memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN);
-       if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) {
+       if (reg_msg.major < LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE ||
+                       reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) {
                return -LTTNG_UST_ERR_UNSUP_MAJOR;
        }