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trace_syscalls: Set event_enter_##sname->data to its metadata

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Set event_enter_##sname->data to its metadata,
it makes codes simpler.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B14D282.7050709@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Lai Jiangshan 2009-12-01 16:23:30 +08:00 committed by Ingo Molnar
parent bf56a4ea9f
commit 31c16b1334
3 changed files with 16 additions and 28 deletions
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6
include/linux/syscalls.h
View file

@ -153,6 +153,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
#define __SC_STR_TDECL6(t, a, ...) #t, __SC_STR_TDECL5(__VA_ARGS__)
#define SYSCALL_TRACE_ENTER_EVENT(sname) \
static const struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call event_enter_##sname; \
struct trace_event enter_syscall_print_##sname = { \
.trace = print_syscall_enter, \
@ -184,11 +185,12 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
.define_fields = syscall_enter_define_fields, \
.regfunc = reg_event_syscall_enter, \
.unregfunc = unreg_event_syscall_enter, \
.data = "sys"#sname, \
.data = (void *)&__syscall_meta_##sname,\
TRACE_SYS_ENTER_PROFILE_INIT(sname) \
}
#define SYSCALL_TRACE_EXIT_EVENT(sname) \
static const struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call event_exit_##sname; \
struct trace_event exit_syscall_print_##sname = { \
.trace = print_syscall_exit, \
@ -220,7 +222,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
.define_fields = syscall_exit_define_fields, \
.regfunc = reg_event_syscall_exit, \
.unregfunc = unreg_event_syscall_exit, \
.data = "sys"#sname, \
.data = (void *)&__syscall_meta_##sname,\
TRACE_SYS_EXIT_PROFILE_INIT(sname) \
}

2
include/trace/syscall.h
View file

@ -34,7 +34,7 @@ struct syscall_metadata {
#ifdef CONFIG_FTRACE_SYSCALLS
extern unsigned long arch_syscall_addr(int nr);
extern int syscall_name_to_nr(char *name);
extern int syscall_name_to_nr(const char *name);
void set_syscall_enter_id(int num, int id);
void set_syscall_exit_id(int num, int id);

36
kernel/trace/trace_syscalls.c
View file

@ -51,7 +51,7 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr)
return syscalls_metadata[nr];
}
int syscall_name_to_nr(char *name)
int syscall_name_to_nr(const char *name)
{
int i;
@ -172,18 +172,11 @@ extern char *__bad_type_size(void);
int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
{
int i;
int nr;
int ret;
struct syscall_metadata *entry;
struct syscall_metadata *entry = call->data;
struct syscall_trace_enter trace;
int offset = offsetof(struct syscall_trace_enter, args);
nr = syscall_name_to_nr(call->data);
entry = syscall_nr_to_meta(nr);
if (!entry)
return 0;
ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
"\tsigned:%u;\n",
SYSCALL_FIELD(int, nr));
@ -245,18 +238,11 @@ int syscall_exit_format(struct ftrace_event_call *call, struct trace_seq *s)
int syscall_enter_define_fields(struct ftrace_event_call *call)
{
struct syscall_trace_enter trace;
struct syscall_metadata *meta;
struct syscall_metadata *meta = call->data;
int ret;
int nr;
int i;
int offset = offsetof(typeof(trace), args);
nr = syscall_name_to_nr(call->data);
meta = syscall_nr_to_meta(nr);
if (!meta)
return 0;
ret = trace_define_common_fields(call);
if (ret)
return ret;
@ -366,9 +352,9 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
{
int ret = 0;
int num;
char *name;
const char *name;
name = (char *)call->data;
name = ((struct syscall_metadata *)call->data)->name;
num = syscall_name_to_nr(name);
if (num < 0 || num >= NR_syscalls)
return -ENOSYS;
@ -389,9 +375,9 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
void unreg_event_syscall_enter(struct ftrace_event_call *call)
{
int num;
char *name;
const char *name;
name = (char *)call->data;
name = ((struct syscall_metadata *)call->data)->name;
num = syscall_name_to_nr(name);
if (num < 0 || num >= NR_syscalls)
return;
@ -407,9 +393,9 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
{
int ret = 0;
int num;
char *name;
const char *name;
name = call->data;
name = ((struct syscall_metadata *)call->data)->name;
num = syscall_name_to_nr(name);
if (num < 0 || num >= NR_syscalls)
return -ENOSYS;
@ -430,9 +416,9 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
void unreg_event_syscall_exit(struct ftrace_event_call *call)
{
int num;
char *name;
const char *name;
name = call->data;
name = ((struct syscall_metadata *)call->data)->name;
num = syscall_name_to_nr(name);
if (num < 0 || num >= NR_syscalls)
return;