diff options
author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-05-31 18:17:57 +0300 |
---|---|---|
committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-07-16 22:14:47 +0300 |
commit | e3dc9f898ef9c6a1a96378517573ee2d04d0abcc (patch) | |
tree | 262ce067fc6f2c093026ba9286fa6bc7f12e1cd3 /kernel | |
parent | b55ce203a8f327b623688c8fb551ac3f9781edea (diff) | |
download | linux-e3dc9f898ef9c6a1a96378517573ee2d04d0abcc.tar.xz |
tracing/probe: Add trace_event_call accesses APIs
Add trace_event_call access APIs for trace_probe.
Instead of accessing trace_probe.call directly, use those
accesses by trace_probe_event_call() method. This hides
the relationship of trace_event_call and trace_probe from
trace_kprobe and trace_uprobe.
Link: http://lkml.kernel.org/r/155931587711.28323.8335129014686133120.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 | 23 | ||||
-rw-r--r-- | kernel/trace/trace_probe.c | 24 | ||||
-rw-r--r-- | kernel/trace/trace_probe.h | 6 | ||||
-rw-r--r-- | kernel/trace/trace_uprobe.c | 15 |
4 files changed, 40 insertions, 28 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 3cf8cee4f276..62362ad1ad98 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -985,7 +985,7 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs, struct ring_buffer *buffer; int size, dsize, pc; unsigned long irq_flags; - struct trace_event_call *call = &tk->tp.call; + struct trace_event_call *call = trace_probe_event_call(&tk->tp); WARN_ON(call != trace_file->event_call); @@ -1033,7 +1033,7 @@ __kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, struct ring_buffer *buffer; int size, pc, dsize; unsigned long irq_flags; - struct trace_event_call *call = &tk->tp.call; + struct trace_event_call *call = trace_probe_event_call(&tk->tp); WARN_ON(call != trace_file->event_call); @@ -1163,7 +1163,7 @@ static int kretprobe_event_define_fields(struct trace_event_call *event_call) static int kprobe_perf_func(struct trace_kprobe *tk, struct pt_regs *regs) { - struct trace_event_call *call = &tk->tp.call; + struct trace_event_call *call = trace_probe_event_call(&tk->tp); struct kprobe_trace_entry_head *entry; struct hlist_head *head; int size, __size, dsize; @@ -1213,7 +1213,7 @@ static void kretprobe_perf_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, struct pt_regs *regs) { - struct trace_event_call *call = &tk->tp.call; + struct trace_event_call *call = trace_probe_event_call(&tk->tp); struct kretprobe_trace_entry_head *entry; struct hlist_head *head; int size, __size, dsize; @@ -1348,9 +1348,10 @@ static struct trace_event_functions kprobe_funcs = { .trace = print_kprobe_event }; -static inline void init_trace_event_call(struct trace_kprobe *tk, - struct trace_event_call *call) +static inline void init_trace_event_call(struct trace_kprobe *tk) { + struct trace_event_call *call = trace_probe_event_call(&tk->tp); + if (trace_kprobe_is_return(tk)) { call->event.funcs = &kretprobe_funcs; call->class->define_fields = kretprobe_event_define_fields; @@ -1366,7 +1367,7 @@ static inline void init_trace_event_call(struct trace_kprobe *tk, static int register_kprobe_event(struct trace_kprobe *tk) { - init_trace_event_call(tk, &tk->tp.call); + init_trace_event_call(tk); return trace_probe_register_event_call(&tk->tp); } @@ -1403,7 +1404,7 @@ create_local_trace_kprobe(char *func, void *addr, unsigned long offs, return ERR_CAST(tk); } - init_trace_event_call(tk, &tk->tp.call); + init_trace_event_call(tk); if (traceprobe_set_print_fmt(&tk->tp, trace_kprobe_is_return(tk)) < 0) { ret = -ENOMEM; @@ -1414,7 +1415,7 @@ create_local_trace_kprobe(char *func, void *addr, unsigned long offs, if (ret < 0) goto error; - return &tk->tp.call; + return trace_probe_event_call(&tk->tp); error: free_trace_kprobe(tk); return ERR_PTR(ret); @@ -1447,7 +1448,7 @@ static __init void enable_boot_kprobe_events(void) mutex_lock(&event_mutex); for_each_trace_kprobe(tk, pos) { list_for_each_entry(file, &tr->events, list) - if (file->event_call == &tk->tp.call) + if (file->event_call == trace_probe_event_call(&tk->tp)) trace_event_enable_disable(file, 1, 0); } mutex_unlock(&event_mutex); @@ -1523,7 +1524,7 @@ find_trace_probe_file(struct trace_kprobe *tk, struct trace_array *tr) struct trace_event_file *file; list_for_each_entry(file, &tr->events, list) - if (file->event_call == &tk->tp.call) + if (file->event_call == trace_probe_event_call(&tk->tp)) return file; return NULL; diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 323a11ad1dad..dbef0d135075 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -844,6 +844,7 @@ static int __set_print_fmt(struct trace_probe *tp, char *buf, int len, int traceprobe_set_print_fmt(struct trace_probe *tp, bool is_return) { + struct trace_event_call *call = trace_probe_event_call(tp); int len; char *print_fmt; @@ -855,7 +856,7 @@ int traceprobe_set_print_fmt(struct trace_probe *tp, bool is_return) /* Second: actually write the @print_fmt */ __set_print_fmt(tp, print_fmt, len + 1, is_return); - tp->call.print_fmt = print_fmt; + call->print_fmt = print_fmt; return 0; } @@ -888,31 +889,34 @@ int traceprobe_define_arg_fields(struct trace_event_call *event_call, void trace_probe_cleanup(struct trace_probe *tp) { + struct trace_event_call *call = trace_probe_event_call(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); + kfree(call->class->system); + kfree(call->name); + kfree(call->print_fmt); } int trace_probe_init(struct trace_probe *tp, const char *event, const char *group) { + struct trace_event_call *call = trace_probe_event_call(tp); + if (!event || !group) return -EINVAL; - tp->call.class = &tp->class; - tp->call.name = kstrdup(event, GFP_KERNEL); - if (!tp->call.name) + call->class = &tp->class; + call->name = kstrdup(event, GFP_KERNEL); + if (!call->name) return -ENOMEM; tp->class.system = kstrdup(group, GFP_KERNEL); if (!tp->class.system) { - kfree(tp->call.name); - tp->call.name = NULL; + kfree(call->name); + call->name = NULL; return -ENOMEM; } INIT_LIST_HEAD(&tp->files); @@ -923,7 +927,7 @@ int trace_probe_init(struct trace_probe *tp, const char *event, int trace_probe_register_event_call(struct trace_probe *tp) { - struct trace_event_call *call = &tp->call; + struct trace_event_call *call = trace_probe_event_call(tp); int ret; ret = register_trace_event(&call->event); diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h index 67424cb5d5d6..6c33d4aa36c3 100644 --- a/kernel/trace/trace_probe.h +++ b/kernel/trace/trace_probe.h @@ -276,6 +276,12 @@ static inline const char *trace_probe_group_name(struct trace_probe *tp) return tp->call.class->system; } +static inline struct trace_event_call * + trace_probe_event_call(struct trace_probe *tp) +{ + return &tp->call; +} + static inline int trace_probe_unregister_event_call(struct trace_probe *tp) { /* tp->event is unregistered in trace_remove_event_call() */ diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 09fdba3ee9d9..7fb9353b47d9 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -821,7 +821,7 @@ static void __uprobe_trace_func(struct trace_uprobe *tu, struct ring_buffer *buffer; void *data; int size, esize; - struct trace_event_call *call = &tu->tp.call; + struct trace_event_call *call = trace_probe_event_call(&tu->tp); WARN_ON(call != trace_file->event_call); @@ -1113,7 +1113,7 @@ static void __uprobe_perf_func(struct trace_uprobe *tu, unsigned long func, struct pt_regs *regs, struct uprobe_cpu_buffer *ucb, int dsize) { - struct trace_event_call *call = &tu->tp.call; + struct trace_event_call *call = trace_probe_event_call(&tu->tp); struct uprobe_trace_entry_head *entry; struct hlist_head *head; void *data; @@ -1316,9 +1316,10 @@ static struct trace_event_functions uprobe_funcs = { .trace = print_uprobe_event }; -static inline void init_trace_event_call(struct trace_uprobe *tu, - struct trace_event_call *call) +static inline void init_trace_event_call(struct trace_uprobe *tu) { + struct trace_event_call *call = trace_probe_event_call(&tu->tp); + call->event.funcs = &uprobe_funcs; call->class->define_fields = uprobe_event_define_fields; @@ -1329,7 +1330,7 @@ static inline void init_trace_event_call(struct trace_uprobe *tu, static int register_uprobe_event(struct trace_uprobe *tu) { - init_trace_event_call(tu, &tu->tp.call); + init_trace_event_call(tu); return trace_probe_register_event_call(&tu->tp); } @@ -1376,14 +1377,14 @@ create_local_trace_uprobe(char *name, unsigned long offs, tu->path = path; tu->ref_ctr_offset = ref_ctr_offset; tu->filename = kstrdup(name, GFP_KERNEL); - init_trace_event_call(tu, &tu->tp.call); + init_trace_event_call(tu); if (traceprobe_set_print_fmt(&tu->tp, is_ret_probe(tu)) < 0) { ret = -ENOMEM; goto error; } - return &tu->tp.call; + return trace_probe_event_call(&tu->tp); error: free_trace_uprobe(tu); return ERR_PTR(ret); |