Prepare callstack common code for stackwalk

[lttng-modules.git] / lttng-context-callstack-legacy-impl.h

diff --git a/lttng-context-callstack-legacy-impl.h b/lttng-context-callstack-legacy-impl.h
index a68e8a18954aff11787527d9c72d87ffe22210df..6b4f06278be412fa284a19203bee53b3d74b91c7 100644 (file)
--- a/lttng-context-callstack-legacy-impl.h
+++ b/lttng-context-callstack-legacy-impl.h
@@ -53,6 +53,12 @@ static struct lttng_cs_type cs_types[] = {
        },
 };
 
+static
+const char *lttng_cs_ctx_mode_name(enum lttng_cs_ctx_modes mode)
+{
+       return cs_types[mode].name;
+}
+
 static
 int init_type(enum lttng_cs_ctx_modes mode)
 {
@@ -70,6 +76,25 @@ int init_type(enum lttng_cs_ctx_modes mode)
        return 0;
 }
 
+static
+void lttng_cs_set_init(struct lttng_cs __percpu *cs_set)
+{
+       int cpu, i;
+
+       for_each_possible_cpu(cpu) {
+               struct lttng_cs *cs;
+
+               cs = per_cpu_ptr(cs_set, cpu);
+               for (i = 0; i < RING_BUFFER_MAX_NESTING; i++) {
+                       struct lttng_cs_dispatch *dispatch;
+
+                       dispatch = &cs->dispatch[i];
+                       dispatch->stack_trace.entries = dispatch->entries;
+                       dispatch->stack_trace.max_entries = MAX_ENTRIES;
+               }
+       }
+}
+
 /* Keep track of nesting inside userspace callstack context code */
 DEFINE_PER_CPU(int, callstack_user_nesting);