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 <jo...@kernel.org>
Cc: Adrian Hunter <adrian.hun...@intel.com>
Cc: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Corey Ashford <cjash...@linux.vnet.ibm.com>
Cc: David Ahern <dsah...@gmail.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Cc: Stephane Eranian <eran...@google.com>
---
tools/perf/tests/Build | 1 +
tools/perf/tests/builtin-test.c | 4 +++
tools/perf/tests/kmod-path.c | 73 +++++++++++++++++++++++++++++++++++++++++
tools/perf/tests/tests.h | 1 +
tools/perf/util/util.c | 66 +++++++++++++++++++++++++++++++++++++
tools/perf/util/util.h | 14 ++++++++
6 files changed, 159 insertions(+)
create mode 100644 tools/perf/tests/kmod-path.c
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 2de01a4b4084..6a8801b32017 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -30,6 +30,7 @@ perf-y += keep-tracking.o
perf-y += code-reading.o
perf-y += sample-parsing.o
perf-y += parse-no-sample-id-all.o
+perf-y += kmod-path.o
perf-$(CONFIG_X86) += perf-time-to-tsc.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 4b7d9ab0f049..31f9959c04c8 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -167,6 +167,10 @@ static struct test {
.func = test__fdarray__add,
},
{
+ .desc = "Test kmod_path__parse function",
+ .func = test__kmod_path__parse,
+ },
+ {
.func = NULL,
},
};
diff --git a/tools/perf/tests/kmod-path.c b/tools/perf/tests/kmod-path.c
new file mode 100644
index 000000000000..277cb851722b
--- /dev/null
+++ b/tools/perf/tests/kmod-path.c
@@ -0,0 +1,73 @@
+#include <stdbool.h>
+#include "tests.h"
+#include "util.h"
+#include "debug.h"
+
+static int test(const char *path, bool alloc_name, bool alloc_ext,
+ bool kmod, bool comp, const char *name, const char *ext)
+{
+ struct kmod_path m;
+
+ memset(&m, 0x0, sizeof(m));
+
+ TEST_ASSERT_VAL("kmod_path__parse",
+ !__kmod_path__parse(&m, path, alloc_name, alloc_ext));
+
+ pr_debug("%s - alloc name %d, alloc ext %d, kmod %d, comp %d, name
'%s', ext '%s'\n",
+ path, alloc_name, alloc_ext, m.kmod, m.comp, m.name, m.ext);
+
+ TEST_ASSERT_VAL("wrong kmod", m.kmod == kmod);
+ TEST_ASSERT_VAL("wrong comp", m.comp == comp);
+
+ if (ext)
+ TEST_ASSERT_VAL("wrong ext", m.ext && !strcmp(ext, m.ext));
+ else
+ TEST_ASSERT_VAL("wrong ext", !m.ext);
+
+ if (name)
+ TEST_ASSERT_VAL("wrong name", m.name && !strcmp(name, m.name));
+ else
+ TEST_ASSERT_VAL("wrong name", !m.name);
+
+ free(m.name);
+ free(m.ext);
+ return 0;
+}
+
+#define T(path, an, ae, k, c, n, e) \
+ TEST_ASSERT_VAL("failed", !test(path, an, ae, k, c, n, e))
+
+int test__kmod_path__parse(void)
+{
+ /* path alloc_name alloc_ext kmod comp name
ext */
+ T("/xxxx/xxxx/x-x.ko", true , true , true, false, "[x_x]",
NULL);
+ T("/xxxx/xxxx/x-x.ko", false , true , true, false, NULL ,
NULL);
+ T("/xxxx/xxxx/x-x.ko", true , false , true, false, "[x_x]",
NULL);
+ T("/xxxx/xxxx/x-x.ko", false , false , true, false, NULL ,
NULL);
+
+ /* path alloc_name alloc_ext kmod comp name ext */
+ T("/xxxx/xxxx/x.ko.gz", true , true , true, true, "[x]", "gz");
+ T("/xxxx/xxxx/x.ko.gz", false , true , true, true, NULL , "gz");
+ T("/xxxx/xxxx/x.ko.gz", true , false , true, true, "[x]", NULL);
+ T("/xxxx/xxxx/x.ko.gz", false , false , true, true, NULL , NULL);
+
+ /* path alloc_name alloc_ext kmod comp name ext */
+ T("/xxxx/xxxx/x.gz", true , true , false, true, "x.gz" ,"gz");
+ T("/xxxx/xxxx/x.gz", false , true , false, true, NULL ,"gz");
+ T("/xxxx/xxxx/x.gz", true , false , false, true, "x.gz" , NULL);
+ T("/xxxx/xxxx/x.gz", false , false , false, true, NULL , NULL);
+
+ /* path alloc_name alloc_ext kmod comp name ext */
+ T("x.gz", true , true , false, true, "x.gz", "gz");
+ T("x.gz", false , true , false, true, NULL , "gz");
+ T("x.gz", true , false , false, true, "x.gz", NULL);
+ T("x.gz", false , false , false, true, NULL , NULL);
+
+ /* path alloc_name alloc_ext kmod comp name ext */
+ T("x.ko.gz", true , true , true, true, "[x]", "gz");
+ T("x.ko.gz", false , true , true, true, NULL , "gz");
+ T("x.ko.gz", true , false , true, true, "[x]", NULL);
+ T("x.ko.gz", false , false , true, true, NULL , NULL);
+
+ return 0;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 00e776a87a9c..52758a33f64c 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -51,6 +51,7 @@ int test__hists_cumulate(void);
int test__switch_tracking(void);
int test__fdarray__filter(void);
int test__fdarray__add(void);
+int test__kmod_path__parse(void);
#if defined(__x86_64__) || defined(__i386__) || defined(__arm__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 4ee6d0d4c993..6226502b038f 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -615,3 +615,69 @@ bool find_process(const char *name)
closedir(dir);
return ret ? false : true;
}
+
+/*
+ * 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;
+}
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 1ff23e04ad27..ddca38a901e8 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -292,6 +292,20 @@ struct parse_tag {
unsigned long parse_tag_value(const char *str, struct parse_tag *tags);
+struct kmod_path {
+ char *name;
+ char *ext;
+ bool comp;
+ bool kmod;
+};
+
+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)
+
#define SRCLINE_UNKNOWN ((char *) "??:0")
static inline int path__join(char *bf, size_t size,
--
1.9.3
--
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