function_graph_enter(unsigned long ret, unsigned long func,
unsigned long frame_pointer, unsigned long *retp);
+struct ftrace_ret_stack *
+ftrace_graph_get_ret_stack(struct task_struct *task, int idx);
+
unsigned long ftrace_graph_ret_addr(struct task_struct *task, int *idx,
unsigned long ret, unsigned long *retp);
return ret;
}
+struct ftrace_ret_stack *
+ftrace_graph_get_ret_stack(struct task_struct *task, int idx)
+{
+ idx = current->curr_ret_stack - idx;
+
+ if (idx >= 0 && idx <= task->curr_ret_stack)
+ return ¤t->ret_stack[idx];
+
+ return NULL;
+}
+
/**
* ftrace_graph_ret_addr - convert a potentially modified stack return address
* to its original value
static int profile_graph_entry(struct ftrace_graph_ent *trace)
{
- int index = current->curr_ret_stack;
+ struct ftrace_ret_stack *ret_stack;
function_profile_call(trace->func, 0, NULL, NULL);
if (!current->ret_stack)
return 0;
- if (index >= 0 && index < FTRACE_RETFUNC_DEPTH)
- current->ret_stack[index].subtime = 0;
+ ret_stack = ftrace_graph_get_ret_stack(current, 0);
+ if (ret_stack)
+ ret_stack->subtime = 0;
return 1;
}
static void profile_graph_return(struct ftrace_graph_ret *trace)
{
+ struct ftrace_ret_stack *ret_stack;
struct ftrace_profile_stat *stat;
unsigned long long calltime;
struct ftrace_profile *rec;
calltime = trace->rettime - trace->calltime;
if (!fgraph_graph_time) {
- int index;
-
- index = current->curr_ret_stack;
/* Append this call time to the parent time to subtract */
- if (index)
- current->ret_stack[index - 1].subtime += calltime;
+ ret_stack = ftrace_graph_get_ret_stack(current, 1);
+ if (ret_stack)
+ ret_stack->subtime += calltime;
- if (current->ret_stack[index].subtime < calltime)
- calltime -= current->ret_stack[index].subtime;
+ ret_stack = ftrace_graph_get_ret_stack(current, 0);
+ if (ret_stack && ret_stack->subtime < calltime)
+ calltime -= ret_stack->subtime;
else
calltime = 0;
}