[Qemu-devel] [PATCH 4/6] trace: Add trace events group implementation in the backend "stderr"

[Mark Wu <wudxw@linux.vnet.ibm.com>]

Signed-off-by: Mark Wu <wudxw@linux.vnet.ibm.com>
---
 trace/stderr.c |   32 ++++++++++++++++++++++++++++++++
 trace/stderr.h |    7 +++++++
 2 files changed, 39 insertions(+), 0 deletions(-)

diff --git a/trace/stderr.c b/trace/stderr.c
index 7107c4a..c409840 100644
--- a/trace/stderr.c
+++ b/trace/stderr.c
@@ -12,6 +12,17 @@ void trace_print_events(FILE *stream, fprintf_function stream_printf)
     }
 }
 
+void trace_print_groups(FILE *stream, fprintf_function stream_printf)
+{
+    unsigned int i;
+
+    for (i = 0; i < NR_TRACE_EVENT_GROUPS; i++) {
+        stream_printf(stream, "%s [GROUP ID %u] : state %u\n",
+                      trace_group_list[i].gp_name, i,
+                      trace_group_list[i].state);
+    }
+}
+
 bool trace_event_set_state(const char *name, bool state)
 {
     unsigned int i;
@@ -25,6 +36,27 @@ bool trace_event_set_state(const char *name, bool state)
     return false;
 }
 
+bool trace_event_group_set_state(const char *gp_name, bool state)
+{
+    unsigned int i;
+    unsigned int j;
+    TraceEventGroup *group;
+
+    for (i = 0; i < NR_TRACE_EVENT_GROUPS; i++) {
+
+	group = &trace_group_list[i];
+        if (!strcmp(group->gp_name, gp_name)) {
+            group->state = state;
+
+            for (j = group->start; j <= group->end; j++) {
+                trace_list[j].state = state;
+            }
+            return true;
+        }
+    }
+    return false;
+}
+
 bool trace_backend_init(const char *events, const char *file)
 {
     if (file) {
diff --git a/trace/stderr.h b/trace/stderr.h
index d575b61..45499f6 100644
--- a/trace/stderr.h
+++ b/trace/stderr.h
@@ -8,4 +8,11 @@ typedef struct {
     bool state;
 } TraceEvent;
 
+typedef struct {
+    const char *gp_name;
+    bool state;
+    int start;
+    int end;
+} TraceEventGroup;
+
 #endif /* ! TRACE_STDERR_H */
-- 
1.7.1