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[lttv.git] / markers-userspace / marker-lib.c

diff --git a/markers-userspace/marker-lib.c b/markers-userspace/marker-lib.c
index da5bcaa33802bbc2c9ae6acbf5d73f295eb26fa4..14d2466d4c8904a86791f13ba6e3c633493f6164 100644 (file)
--- a/markers-userspace/marker-lib.c
+++ b/markers-userspace/marker-lib.c
@@ -1,5 +1,14 @@
 
 #include "marker.h"
+#include <stdio.h>
+#include <errno.h>
+#include <sys/user.h>
+
+__attribute__ ((visibility ("protected")))
+extern struct marker __start___markers[];
+
+__attribute__ ((visibility ("protected")))
+extern struct marker __stop___markers[];
 
 /**
  * __mark_empty_function - Empty probe callback
@@ -13,6 +22,7 @@
  * though the function pointer change and the marker enabling are two distinct
  * operations that modifies the execution flow of preemptible code.
  */
+__attribute__ ((visibility ("protected")))
 void __mark_empty_function(void *probe_private, void *call_private,
        const char *fmt, va_list *args)
 {
@@ -26,9 +36,58 @@ void __mark_empty_function(void *probe_private, void *call_private,
  * @...:  Variable argument list.
  *
  */
+__attribute__ ((visibility ("protected")))
 void marker_probe_cb(const struct marker *mdata, void *call_private,
        const char *fmt, ...)
 {
+       char buf[PAGE_SIZE];
+       va_list ap;
+
+       va_start(ap, fmt);
+       vsnprintf(buf, PAGE_SIZE-1, fmt, ap);
+       sys_trace(0, 0, buf);
+       va_end(ap);
+}
+
+//FIXME : imv_read won't work with optimized immediate values.
+//will need to issue one sys_marker call for each immediate value.
+__attribute__ ((visibility ("protected")))
+void testip(void)
+{
+       printf("addr : %p\n", __builtin_return_address(0));
+}
+
+__attribute__((constructor, visibility ("protected")))
+void marker_init(void)
+{
+       struct marker *iter;
+       int ret;
 
+       printf("Marker section : from %p to %p (init)\n",
+               __start___markers, __stop___markers);
+       testip();
+       for (iter = __start___markers; iter < __stop___markers; iter++) {
+               printf("Marker : %s\n", iter->name);
+               ret = sys_marker(iter->name, iter->format,
+                       &imv_read(iter->state), 1);
+               if (ret)
+                       perror("Error connecting markers");
+       }
+}
+
+__attribute__((destructor, visibility ("protected")))
+void marker_fini(void)
+{
+       struct marker *iter;
+       int ret;
 
+       printf("Marker section : from %p to %p (fini)\n",
+               __start___markers, __stop___markers);
+       for (iter = __start___markers; iter < __stop___markers; iter++) {
+               printf("Marker : %s\n", iter->name);
+               ret = sys_marker(iter->name, iter->format,
+                       &imv_read(iter->state), 0);
+               if (ret)
+                       perror("Error disconnecting markers");
+       }
 }