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authorLluís <xscript@gmx.net>2011-08-31 20:31:51 +0200
committerStefan Hajnoczi <stefanha@linux.vnet.ibm.com>2011-09-01 10:34:54 +0100
commit9a82b6a590bd7c845ab9754b34b33ffee982ccb2 (patch)
treec23b7078b7db55c798577eb28f281873a5d2062c /trace
parent03727e6a06087dc8f46d5674b4b29262bf7377a4 (diff)
trace: [stderr] add support for dynamically enabling/disabling events
Uses the generic interface provided in "trace/control.h" in order to provide a programmatic interface as well as command line and monitor controls. Signed-off-by: Fabien Chouteau <chouteau@adacore.com> Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Diffstat (limited to 'trace')
-rw-r--r--trace/stderr.c37
-rw-r--r--trace/stderr.h11
2 files changed, 48 insertions, 0 deletions
diff --git a/trace/stderr.c b/trace/stderr.c
new file mode 100644
index 0000000000..7107c4a131
--- /dev/null
+++ b/trace/stderr.c
@@ -0,0 +1,37 @@
+#include "trace.h"
+#include "trace/control.h"
+
+
+void trace_print_events(FILE *stream, fprintf_function stream_printf)
+{
+ unsigned int i;
+
+ for (i = 0; i < NR_TRACE_EVENTS; i++) {
+ stream_printf(stream, "%s [Event ID %u] : state %u\n",
+ trace_list[i].tp_name, i, trace_list[i].state);
+ }
+}
+
+bool trace_event_set_state(const char *name, bool state)
+{
+ unsigned int i;
+
+ for (i = 0; i < NR_TRACE_EVENTS; i++) {
+ if (!strcmp(trace_list[i].tp_name, name)) {
+ trace_list[i].state = state;
+ return true;
+ }
+ }
+ return false;
+}
+
+bool trace_backend_init(const char *events, const char *file)
+{
+ if (file) {
+ fprintf(stderr, "error: -trace file=...: "
+ "option not supported by the selected tracing backend\n");
+ return false;
+ }
+ trace_backend_init_events(events);
+ return true;
+}
diff --git a/trace/stderr.h b/trace/stderr.h
new file mode 100644
index 0000000000..d575b613e3
--- /dev/null
+++ b/trace/stderr.h
@@ -0,0 +1,11 @@
+#ifndef TRACE_STDERR_H
+#define TRACE_STDERR_H
+
+typedef uint64_t TraceEventID;
+
+typedef struct {
+ const char *tp_name;
+ bool state;
+} TraceEvent;
+
+#endif /* ! TRACE_STDERR_H */