perf probe: Add glob matching support on --del

Add glob-expression matching support on --del option.
You can use wildcards for specifying deleting events.
e.g.

 Clear all probe events:

 # perf probe --del '*'

 Clear probes on schedule():

 # perf probe --del 'schedule*'

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091215153210.17436.12327.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 25 insertions, 0 deletions

diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index f24a8cc933d5..5352d7dccc61 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -226,3 +226,28 @@ fail:
         argv_free(argv);
         return NULL;
 }
+
+/* Glob expression pattern matching */
+bool strglobmatch(const char *str, const char *pat)
+{
+        while (*str && *pat && *pat != '*') {
+                if (*pat == '?') {
+                        str++;
+                        pat++;
+                } else
+                        if (*str++ != *pat++)
+                                return false;
+        }
+        /* Check wild card */
+        if (*pat == '*') {
+                while (*pat == '*')
+                        pat++;
+                if (!*pat)      /* Tail wild card matches all */
+                        return true;
+                while (*str)
+                        if (strglobmatch(str++, pat))
+                                return true;
+        }
+        return !*str && !*pat;
+}
+