From: Andi Kleen <a...@linux.intel.com>
When an event fails to parse and it's not in a new style format,
try to parse it again as a cpu event.
This allows to use sysfs exported events directly without //, so you can use
perf record -e mem-loads ...
instead of
perf record -e cpu/mem-loads/
v2: Handle multiple events
v3: Move to separate function
v4: Move library function to util/string.c
v5: Handle unhandleable errors
Signed-off-by: Andi Kleen <a...@linux.intel.com>
---
tools/perf/util/include/linux/string.h | 1 +
tools/perf/util/parse-events.c | 30 +++++++++++++++++++++++++++++-
tools/perf/util/string.c | 24 ++++++++++++++++++++++++
3 files changed, 54 insertions(+), 1 deletions(-)
diff --git a/tools/perf/util/include/linux/string.h
b/tools/perf/util/include/linux/string.h
index 6f19c54..97a8007 100644
--- a/tools/perf/util/include/linux/string.h
+++ b/tools/perf/util/include/linux/string.h
@@ -1,3 +1,4 @@
#include <string.h>
void *memdup(const void *src, size_t len);
+int str_append(char **s, int *len, const char *a);
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 68d8476..e0feaed 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -6,7 +6,7 @@
#include "parse-options.h"
#include "parse-events.h"
#include "exec_cmd.h"
-#include "string.h"
+#include "linux/string.h"
#include "symbol.h"
#include "cache.h"
#include "header.h"
@@ -826,6 +826,32 @@ int parse_events_name(struct list_head *list, char *name)
return 0;
}
+static int parse_events__scanner(const char *str, void *data, int start_token);
+
+static int parse_events_fixup(int ret, const char *str, void *data,
+ int start_token)
+{
+ char *o = strdup(str);
+ char *s = NULL;
+ char *t = o;
+ char *p;
+ int len = 0;
+
+ if (!o)
+ return ret;
+ while ((p = strsep(&t, ",")) != NULL) {
+ if (s)
+ str_append(&s, &len, ",");
+ str_append(&s, &len, "cpu/");
+ str_append(&s, &len, p);
+ str_append(&s, &len, "/");
+ }
+ free(o);
+ if (!s)
+ return -ENOMEM;
+ return parse_events__scanner(s, data, start_token);
+}
+
static int parse_events__scanner(const char *str, void *data, int start_token)
{
YY_BUFFER_STATE buffer;
@@ -846,6 +872,8 @@ static int parse_events__scanner(const char *str, void
*data, int start_token)
parse_events__flush_buffer(buffer, scanner);
parse_events__delete_buffer(buffer, scanner);
parse_events_lex_destroy(scanner);
+ if (ret && !strchr(str, '/'))
+ ret = parse_events_fixup(ret, str, data, start_token);
return ret;
}
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index 29c7b2c..f0b0c00 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -387,3 +387,27 @@ void *memdup(const void *src, size_t len)
return p;
}
+
+/**
+ * str_append - reallocate string and append another
+ * @s: pointer to string pointer
+ * @len: pointer to len (initialized)
+ * @a: string to append.
+ */
+int str_append(char **s, int *len, const char *a)
+{
+ int olen = *s ? strlen(*s) : 0;
+ int nlen = olen + strlen(a) + 1;
+ if (*len < nlen) {
+ *len = *len * 2;
+ if (*len < nlen)
+ *len = nlen;
+ *s = realloc(*s, *len);
+ if (!*s)
+ return -ENOMEM;
+ if (olen == 0)
+ **s = 0;
+ }
+ strcat(*s, a);
+ return 0;
+}
--
1.7.7.6
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