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Diffstat (limited to 'kernel/trace/trace_functions_graph.c')
-rw-r--r--kernel/trace/trace_functions_graph.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 66e1a527cf1a..a7f4b9a47a71 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -27,14 +27,21 @@ struct fgraph_cpu_data {
unsigned long enter_funcs[FTRACE_RETFUNC_DEPTH];
};
+struct fgraph_ent_args {
+ struct ftrace_graph_ent_entry ent;
+ /* Force the sizeof of args[] to have FTRACE_REGS_MAX_ARGS entries */
+ unsigned long args[FTRACE_REGS_MAX_ARGS];
+};
+
struct fgraph_data {
struct fgraph_cpu_data __percpu *cpu_data;
/* Place to preserve last processed entry. */
union {
- struct ftrace_graph_ent_entry ent;
+ struct fgraph_ent_args ent;
+ /* TODO allow retaddr to have args */
struct fgraph_retaddr_ent_entry rent;
- } ent;
+ };
struct ftrace_graph_ret_entry ret;
int failed;
int cpu;
@@ -627,10 +634,13 @@ get_return_for_leaf(struct trace_iterator *iter,
* Save current and next entries for later reference
* if the output fails.
*/
- if (unlikely(curr->ent.type == TRACE_GRAPH_RETADDR_ENT))
- data->ent.rent = *(struct fgraph_retaddr_ent_entry *)curr;
- else
- data->ent.ent = *curr;
+ if (unlikely(curr->ent.type == TRACE_GRAPH_RETADDR_ENT)) {
+ data->rent = *(struct fgraph_retaddr_ent_entry *)curr;
+ } else {
+ int size = min((int)sizeof(data->ent), (int)iter->ent_size);
+
+ memcpy(&data->ent, curr, size);
+ }
/*
* If the next event is not a return type, then
* we only care about what type it is. Otherwise we can