X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Flib%2Flttng-ctl%2Flttng-ctl.cpp;h=3d0c8b412cc7297914051a3417831d417857bf28;hp=b9311a07ef2051bfeb6243e071f381aef3f90379;hb=HEAD;hpb=cd9adb8b829564212158943a0d279bb35322ab30

diff --git a/src/lib/lttng-ctl/lttng-ctl.cpp b/src/lib/lttng-ctl/lttng-ctl.cpp
index b9311a07e..bbc94828e 100644
--- a/src/lib/lttng-ctl/lttng-ctl.cpp
+++ b/src/lib/lttng-ctl/lttng-ctl.cpp
@@ -24,6 +24,7 @@
 #include <common/filter/filter-ast.hpp>
 #include <common/filter/filter-parser.hpp>
 #include <common/filter/memstream.hpp>
+#include <common/make-unique-wrapper.hpp>
 #include <common/payload-view.hpp>
 #include <common/payload.hpp>
 #include <common/sessiond-comm/sessiond-comm.hpp>
@@ -52,12 +53,12 @@
 #include <string.h>
 #include <unistd.h>
 
-#define COPY_DOMAIN_PACKED(dst, src)                             \
-	do {                                                     \
-		struct lttng_domain _tmp_domain;                 \
-                                                                 \
-		lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \
-		dst = _tmp_domain;                               \
+#define COPY_DOMAIN_PACKED(dst, src)                               \
+	do {                                                       \
+		struct lttng_domain _tmp_domain;                   \
+                                                                   \
+		lttng_ctl_copy_lttng_domain(&_tmp_domain, &(src)); \
+		(dst) = _tmp_domain;                               \
 	} while (0)
 
 /* Socket to session daemon for communication */
@@ -2877,6 +2878,34 @@ end:
 	return ret;
 }
 
+/*
+ * Get the status of the kernel tracer
+ *
+ * Sets the value of the argument
+ */
+enum lttng_error_code lttng_get_kernel_tracer_status(enum lttng_kernel_tracer_status *out_status)
+{
+	if (out_status == nullptr) {
+		return LTTNG_ERR_INVALID;
+	}
+
+	struct lttcomm_session_msg lsm = {};
+	lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_KERNEL_TRACER_STATUS;
+
+	uint32_t *raw_tracer_status = nullptr;
+	const auto ask_ret = lttng_ctl_ask_sessiond(&lsm, (void **) &raw_tracer_status);
+
+	const auto tracer_status =
+		lttng::make_unique_wrapper<uint32_t, lttng::memory::free>(raw_tracer_status);
+
+	if (ask_ret != 4) {
+		return LTTNG_ERR_INVALID;
+	}
+
+	*out_status = (enum lttng_kernel_tracer_status) * tracer_status;
+	return LTTNG_OK;
+}
+
 /*
  * Regenerate the metadata for a session.
  * Return 0 on success, a negative error code on error.