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perf tools: Fallback to srcdir/Documentation/tips.txt

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Some people don't install perf, but just use compiled version in the
source.  Fallback to lookup the source directory for those poor guys. :)

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1452334589-8782-4-git-send-email-namhyung@kernel.org
[ Make perf_tip() return NULL for ENOENT, making the fallback to really take place ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2016-01-09 19:16:29 +09:00 committed by Arnaldo Carvalho de Melo
parent 090cff3eae
commit 34b7b0f95d
2 changed files with 15 additions and 6 deletions
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10
tools/perf/builtin-report.c
View file

@ -28,6 +28,7 @@
#include "util/tool.h"
#include <subcmd/parse-options.h>
#include <subcmd/exec-cmd.h>
#include "util/parse-events.h"
#include "util/thread.h"
@ -433,7 +434,14 @@ static int report__browse_hists(struct report *rep)
int ret;
struct perf_session *session = rep->session;
struct perf_evlist *evlist = session->evlist;
const char *help = perf_tip(TIPDIR);
const char *help = perf_tip(system_path(TIPDIR));
if (help == NULL) {
/* fallback for people who don't install perf ;-) */
help = perf_tip(DOCDIR);
if (help == NULL)
help = "Cannot load tips.txt file, please install perf!";
}
switch (use_browser) {
case 1:

11
tools/perf/util/util.c
View file

@ -17,7 +17,6 @@
#include <unistd.h>
#include "callchain.h"
#include "strlist.h"
#include <subcmd/exec-cmd.h>
struct callchain_param callchain_param = {
.mode = CHAIN_GRAPH_ABS,
@ -672,14 +671,16 @@ const char *perf_tip(const char *dirpath)
struct str_node *node;
char *tip = NULL;
struct strlist_config conf = {
.dirname = system_path(dirpath) ,
.dirname = dirpath,
.file_only = true,
};
tips = strlist__new("tips.txt", &conf);
if (tips == NULL || strlist__nr_entries(tips) == 1) {
tip = (char *)"Cannot find tips.txt file";
if (tips == NULL)
return errno == ENOENT ? NULL : "Tip: get more memory! ;-p";
if (strlist__nr_entries(tips) == 0)
goto out;
}
node = strlist__entry(tips, random() % strlist__nr_entries(tips));
if (asprintf(&tip, "Tip: %s", node->s) < 0)