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authorJiri Olsa <jolsa@kernel.org>2015-02-05 15:40:25 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-03-21 14:53:41 -0300
commit3c8a67f50a1e68b912d1d74db6b455cac54ec4b4 (patch)
tree1d03faa7eaa676cf7eefa53f2f938409929dee72 /tools/perf/util/dso.c
parent80a32e5b498a7547073e5e4b2b804edc7219979d (diff)
downloadlinux-3c8a67f50a1e68b912d1d74db6b455cac54ec4b4.tar.bz2
perf tools: Add kmod_path__parse function
Provides united way of parsing kernel module path into several components. The new kmod_path__parse function and few defines: int __kmod_path__parse(struct kmod_path *m, const char *path, bool alloc_name, bool alloc_ext); #define kmod_path__parse(__m, __p) __kmod_path__parse(__m, __p, false, false) #define kmod_path__parse_name(__m, __p) __kmod_path__parse(__m, __p, true , false) #define kmod_path__parse_ext(__m, __p) __kmod_path__parse(__m, __p, false, true) parse kernel module @path and updates @m argument like: @comp - true if @path contains supported compression suffix, false otherwise @kmod - true if @path contains '.ko' suffix in right position, false otherwise @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name of the kernel module without suffixes, otherwise strudup-ed base name of @path @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string the compression suffix It returns 0 if there's no strdup error, -ENOMEM otherwise. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-9t6eqg8j610r94l743hkntiv@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/dso.c')
-rw-r--r--tools/perf/util/dso.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index be368414036c..3e6863feb066 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -212,6 +212,72 @@ bool dso__needs_decompress(struct dso *dso)
}
/*
+ * Parses kernel module specified in @path and updates
+ * @m argument like:
+ *
+ * @comp - true if @path contains supported compression suffix,
+ * false otherwise
+ * @kmod - true if @path contains '.ko' suffix in right position,
+ * false otherwise
+ * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name
+ * of the kernel module without suffixes, otherwise strudup-ed
+ * base name of @path
+ * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string
+ * the compression suffix
+ *
+ * Returns 0 if there's no strdup error, -ENOMEM otherwise.
+ */
+int __kmod_path__parse(struct kmod_path *m, const char *path,
+ bool alloc_name, bool alloc_ext)
+{
+ const char *name = strrchr(path, '/');
+ const char *ext = strrchr(path, '.');
+
+ memset(m, 0x0, sizeof(*m));
+ name = name ? name + 1 : path;
+
+ /* No extension, just return name. */
+ if (ext == NULL) {
+ if (alloc_name) {
+ m->name = strdup(name);
+ return m->name ? 0 : -ENOMEM;
+ }
+ return 0;
+ }
+
+ if (is_supported_compression(ext + 1)) {
+ m->comp = true;
+ ext -= 3;
+ }
+
+ /* Check .ko extension only if there's enough name left. */
+ if (ext > name)
+ m->kmod = !strncmp(ext, ".ko", 3);
+
+ if (alloc_name) {
+ if (m->kmod) {
+ if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1)
+ return -ENOMEM;
+ } else {
+ if (asprintf(&m->name, "%s", name) == -1)
+ return -ENOMEM;
+ }
+
+ strxfrchar(m->name, '-', '_');
+ }
+
+ if (alloc_ext && m->comp) {
+ m->ext = strdup(ext + 4);
+ if (!m->ext) {
+ free((void *) m->name);
+ return -ENOMEM;
+ }
+ }
+
+ return 0;
+}
+
+/*
* Global list of open DSOs and the counter.
*/
static LIST_HEAD(dso__data_open);