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Commit ab10d69e authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Steven Rostedt (VMware)
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tracing/uprobe: Add per-probe delete from event 

Add per-probe delete method from one event passing the head of
definition. In other words, the events which match the head
N parameters are deleted.

Link: http://lkml.kernel.org/r/156095689811.28024.221706761151739433.stgit@devnote2



Signed-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent eb5bf813

kernel/trace/trace_uprobe.c

+30 −1
Original line number Diff line number Diff line
@@ -284,13 +284,42 @@ static bool trace_uprobe_is_busy(struct dyn_event *ev) 
	return trace_probe_is_enabled(&tu->tp);

}



static bool trace_uprobe_match_command_head(struct trace_uprobe *tu,

					    int argc, const char **argv)

{

	char buf[MAX_ARGSTR_LEN + 1];

	int len;



	if (!argc)

		return true;



	len = strlen(tu->filename);

	if (strncmp(tu->filename, argv[0], len) || argv[0][len] != ':')

		return false;



	if (tu->ref_ctr_offset == 0)

		snprintf(buf, sizeof(buf), "0x%0*lx",

				(int)(sizeof(void *) * 2), tu->offset);

	else

		snprintf(buf, sizeof(buf), "0x%0*lx(0x%lx)",

				(int)(sizeof(void *) * 2), tu->offset,

				tu->ref_ctr_offset);

	if (strcmp(buf, &argv[0][len + 1]))

		return false;



	argc--; argv++;



	return trace_probe_match_command_args(&tu->tp, argc, argv);

}



static bool trace_uprobe_match(const char *system, const char *event,

			int argc, const char **argv, struct dyn_event *ev)

{

	struct trace_uprobe *tu = to_trace_uprobe(ev);



	return strcmp(trace_probe_name(&tu->tp), event) == 0 &&

	    (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0);

	   (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0) &&

	   trace_uprobe_match_command_head(tu, argc, argv);

}



static nokprobe_inline struct trace_uprobe *