[Qemu-devel] [PATCH 3/6] trace: Add trace events group implementation in the backend "simple"

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

Signed-off-by: Mark Wu <wudxw@linux.vnet.ibm.com>
---
 trace/simple.c |   30 ++++++++++++++++++++++++++++++
 trace/simple.h |    7 +++++++
 2 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/trace/simple.c b/trace/simple.c
index b639dda..7aa4c0b 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -321,6 +321,16 @@ 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;
@@ -334,6 +344,26 @@ 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;
+}
+
 /* Helper function to create a thread with signals blocked.  Use glib's
  * portable threads since QEMU abstractions cannot be used due to reentrancy in
  * the tracer.  Also note the signal masking on POSIX hosts so that the thread
diff --git a/trace/simple.h b/trace/simple.h
index 466e75b..cf119f3 100644
--- a/trace/simple.h
+++ b/trace/simple.h
@@ -22,6 +22,13 @@ typedef struct {
     bool state;
 } TraceEvent;
 
+typedef struct {
+    const char *gp_name;
+    bool state;
+    int start;
+    int end;
+} TraceEventGroup;
+
 void trace0(TraceEventID event);
 void trace1(TraceEventID event, uint64_t x1);
 void trace2(TraceEventID event, uint64_t x1, uint64_t x2);
-- 
1.7.1