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tracing/function-return-tracer: change the name into function-graph-tracer

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Impact: cleanup

This patch changes the name of the "return function tracer" into
function-graph-tracer which is a more suitable name for a tracing
which makes one able to retrieve the ordered call stack during
the code flow.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker
2008-11-25 21:07:04 +01:00
committed by Ingo Molnar
parent 509dceef64
commit fb52607afc
17 changed files with 173 additions and 72 deletions
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26
kernel/trace/ftrace.c
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@@ -395,11 +395,11 @@ __ftrace_replace_code(struct dyn_ftrace *rec, int enable)
unsigned long ip, fl;
unsigned long ftrace_addr;
#ifdef CONFIG_FUNCTION_RET_TRACER
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
if (ftrace_tracing_type == FTRACE_TYPE_ENTER)
ftrace_addr = (unsigned long)ftrace_caller;
else
ftrace_addr = (unsigned long)ftrace_return_caller;
ftrace_addr = (unsigned long)ftrace_graph_caller;
#else
ftrace_addr = (unsigned long)ftrace_caller;
#endif
@@ -1496,13 +1496,13 @@ ftrace_enable_sysctl(struct ctl_table *table, int write,
return ret;
}
#ifdef CONFIG_FUNCTION_RET_TRACER
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
static atomic_t ftrace_retfunc_active;
/* The callback that hooks the return of a function */
trace_function_return_t ftrace_function_return =
(trace_function_return_t)ftrace_stub;
trace_function_graph_t ftrace_graph_function =
(trace_function_graph_t)ftrace_stub;
/* Try to assign a return stack array on FTRACE_RETSTACK_ALLOC_SIZE tasks. */
@@ -1549,7 +1549,7 @@ free:
}
/* Allocate a return stack for each task */
static int start_return_tracing(void)
static int start_graph_tracing(void)
{
struct ftrace_ret_stack **ret_stack_list;
int ret;
@@ -1569,7 +1569,7 @@ static int start_return_tracing(void)
return ret;
}
int register_ftrace_return(trace_function_return_t func)
int register_ftrace_graph(trace_function_graph_t func)
{
int ret = 0;
@@ -1584,13 +1584,13 @@ int register_ftrace_return(trace_function_return_t func)
goto out;
}
atomic_inc(&ftrace_retfunc_active);
ret = start_return_tracing();
ret = start_graph_tracing();
if (ret) {
atomic_dec(&ftrace_retfunc_active);
goto out;
}
ftrace_tracing_type = FTRACE_TYPE_RETURN;
ftrace_function_return = func;
ftrace_graph_function = func;
ftrace_startup();
out:
@@ -1598,12 +1598,12 @@ out:
return ret;
}
void unregister_ftrace_return(void)
void unregister_ftrace_graph(void)
{
mutex_lock(&ftrace_sysctl_lock);
atomic_dec(&ftrace_retfunc_active);
ftrace_function_return = (trace_function_return_t)ftrace_stub;
ftrace_graph_function = (trace_function_graph_t)ftrace_stub;
ftrace_shutdown();
/* Restore normal tracing type */
ftrace_tracing_type = FTRACE_TYPE_ENTER;
@@ -1612,7 +1612,7 @@ void unregister_ftrace_return(void)
}
/* Allocate a return stack for newly created task */
void ftrace_retfunc_init_task(struct task_struct *t)
void ftrace_graph_init_task(struct task_struct *t)
{
if (atomic_read(&ftrace_retfunc_active)) {
t->ret_stack = kmalloc(FTRACE_RETFUNC_DEPTH
@@ -1626,7 +1626,7 @@ void ftrace_retfunc_init_task(struct task_struct *t)
t->ret_stack = NULL;
}
void ftrace_retfunc_exit_task(struct task_struct *t)
void ftrace_graph_exit_task(struct task_struct *t)
{
struct ftrace_ret_stack *ret_stack = t->ret_stack;