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author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-06-01 00:17:06 +0900 |
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committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-07-16 15:14:47 -0400 |
commit | 455b289973f7df350ea179c7eb8bfed0c766ec40 (patch) | |
tree | 5d863af6ee6ca3e3993d8c898a60ff49412c8bd2 /kernel | |
parent | b4d4b96be89466049a0d383d019edc1403bf0ba9 (diff) | |
download | linux-455b289973f7df350ea179c7eb8bfed0c766ec40.tar.gz linux-455b289973f7df350ea179c7eb8bfed0c766ec40.tar.bz2 linux-455b289973f7df350ea179c7eb8bfed0c766ec40.zip |
tracing/probe: Add trace_probe init and free functions
Add common trace_probe init and cleanup function in
trace_probe.c, and use it from trace_kprobe.c and trace_uprobe.c
Link: http://lkml.kernel.org/r/155931582664.28323.5934870189034740822.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/trace/trace_kprobe.c | 49 | ||||
-rw-r--r-- | kernel/trace/trace_probe.c | 36 | ||||
-rw-r--r-- | kernel/trace/trace_probe.h | 4 | ||||
-rw-r--r-- | kernel/trace/trace_uprobe.c | 27 |
4 files changed, 58 insertions, 58 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 01fc49f08b70..c43c2d419ded 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -197,6 +197,16 @@ static int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs); static int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs); +static void free_trace_kprobe(struct trace_kprobe *tk) +{ + if (tk) { + trace_probe_cleanup(&tk->tp); + kfree(tk->symbol); + free_percpu(tk->nhit); + kfree(tk); + } +} + /* * Allocate new trace_probe and initialize it (including kprobes). */ @@ -235,49 +245,17 @@ static struct trace_kprobe *alloc_trace_kprobe(const char *group, tk->rp.maxactive = maxactive; - if (!event || !group) { - ret = -EINVAL; - goto error; - } - - tk->tp.call.class = &tk->tp.class; - tk->tp.call.name = kstrdup(event, GFP_KERNEL); - if (!tk->tp.call.name) - goto error; - - tk->tp.class.system = kstrdup(group, GFP_KERNEL); - if (!tk->tp.class.system) + ret = trace_probe_init(&tk->tp, event, group); + if (ret < 0) goto error; dyn_event_init(&tk->devent, &trace_kprobe_ops); - INIT_LIST_HEAD(&tk->tp.files); return tk; error: - kfree(tk->tp.call.name); - kfree(tk->symbol); - free_percpu(tk->nhit); - kfree(tk); + free_trace_kprobe(tk); return ERR_PTR(ret); } -static void free_trace_kprobe(struct trace_kprobe *tk) -{ - int i; - - if (!tk) - return; - - for (i = 0; i < tk->tp.nr_args; i++) - traceprobe_free_probe_arg(&tk->tp.args[i]); - - kfree(tk->tp.call.class->system); - kfree(tk->tp.call.name); - kfree(tk->tp.call.print_fmt); - kfree(tk->symbol); - free_percpu(tk->nhit); - kfree(tk); -} - static struct trace_kprobe *find_trace_kprobe(const char *event, const char *group) { @@ -1400,7 +1378,6 @@ static struct trace_event_functions kprobe_funcs = { static inline void init_trace_event_call(struct trace_kprobe *tk, struct trace_event_call *call) { - INIT_LIST_HEAD(&call->class->fields); if (trace_kprobe_is_return(tk)) { call->event.funcs = &kretprobe_funcs; call->class->define_fields = kretprobe_event_define_fields; diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index b6b0593844cd..fe4ee2e73d92 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -884,3 +884,39 @@ int traceprobe_define_arg_fields(struct trace_event_call *event_call, } return 0; } + + +void trace_probe_cleanup(struct trace_probe *tp) +{ + int i; + + for (i = 0; i < tp->nr_args; i++) + traceprobe_free_probe_arg(&tp->args[i]); + + kfree(tp->call.class->system); + kfree(tp->call.name); + kfree(tp->call.print_fmt); +} + +int trace_probe_init(struct trace_probe *tp, const char *event, + const char *group) +{ + if (!event || !group) + return -EINVAL; + + tp->call.class = &tp->class; + tp->call.name = kstrdup(event, GFP_KERNEL); + if (!tp->call.name) + return -ENOMEM; + + tp->class.system = kstrdup(group, GFP_KERNEL); + if (!tp->class.system) { + kfree(tp->call.name); + tp->call.name = NULL; + return -ENOMEM; + } + INIT_LIST_HEAD(&tp->files); + INIT_LIST_HEAD(&tp->class.fields); + + return 0; +} diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h index 42816358dd48..818b1d7693ba 100644 --- a/kernel/trace/trace_probe.h +++ b/kernel/trace/trace_probe.h @@ -248,6 +248,10 @@ static inline bool trace_probe_is_registered(struct trace_probe *tp) return !!(tp->flags & TP_FLAG_REGISTERED); } +int trace_probe_init(struct trace_probe *tp, const char *event, + const char *group); +void trace_probe_cleanup(struct trace_probe *tp); + /* Check the name is good for event/group/fields */ static inline bool is_good_name(const char *name) { diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 34ce671b6080..b18b7eb1a76f 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -300,25 +300,17 @@ static struct trace_uprobe * alloc_trace_uprobe(const char *group, const char *event, int nargs, bool is_ret) { struct trace_uprobe *tu; - - if (!event || !group) - return ERR_PTR(-EINVAL); + int ret; tu = kzalloc(SIZEOF_TRACE_UPROBE(nargs), GFP_KERNEL); if (!tu) return ERR_PTR(-ENOMEM); - tu->tp.call.class = &tu->tp.class; - tu->tp.call.name = kstrdup(event, GFP_KERNEL); - if (!tu->tp.call.name) - goto error; - - tu->tp.class.system = kstrdup(group, GFP_KERNEL); - if (!tu->tp.class.system) + ret = trace_probe_init(&tu->tp, event, group); + if (ret < 0) goto error; dyn_event_init(&tu->devent, &trace_uprobe_ops); - INIT_LIST_HEAD(&tu->tp.files); tu->consumer.handler = uprobe_dispatcher; if (is_ret) tu->consumer.ret_handler = uretprobe_dispatcher; @@ -326,26 +318,18 @@ alloc_trace_uprobe(const char *group, const char *event, int nargs, bool is_ret) return tu; error: - kfree(tu->tp.call.name); kfree(tu); - return ERR_PTR(-ENOMEM); + return ERR_PTR(ret); } static void free_trace_uprobe(struct trace_uprobe *tu) { - int i; - if (!tu) return; - for (i = 0; i < tu->tp.nr_args; i++) - traceprobe_free_probe_arg(&tu->tp.args[i]); - path_put(&tu->path); - kfree(tu->tp.call.class->system); - kfree(tu->tp.call.name); - kfree(tu->tp.call.print_fmt); + trace_probe_cleanup(&tu->tp); kfree(tu->filename); kfree(tu); } @@ -1351,7 +1335,6 @@ static struct trace_event_functions uprobe_funcs = { static inline void init_trace_event_call(struct trace_uprobe *tu, struct trace_event_call *call) { - INIT_LIST_HEAD(&call->class->fields); call->event.funcs = &uprobe_funcs; call->class->define_fields = uprobe_event_define_fields; 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