Merge tag 'perf-core-for-mingo-4.14-20170725' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvemends and fixes for v4.14:

New features:

- Filter out 'sshd' in the tracer ancestry in 'perf trace' syswide tracing,
  to elliminate tracing loops (Arnaldo Carvalho de Melo)

- Support lookup of symbols in other mount namespaces in 'perf top' (Krister Johansen)

- Initial 'clone' syscall args beautifier in 'perf trace' (Arnaldo Carvalho de Melo)

User visible changes:

- Ignore 'fd' and 'offset' args for MAP_ANONYMOUS in 'perf trace'
  (Arnaldo Carvalho de Melo)

- Process tracing data in 'perf annotate' pipe mode (David Carrillo-Cisneros)

- Make 'perf report --branch-history' work without callgraphs(-g) option
  in perf record (Jin Yao)

- Tag branch type/flag on "to" and tag cycles on "from" in 'perf report' (Jin Yao)

Fixes:

- Fix jvmti linker error when libelf config is disabled (Sudeep Holla)

- Fix cgroups refcount usage (Arnaldo Carvalho de Melo)

- Fix kernel symbol adjustment for s390x (Thomas Richter)

- Fix 'perf report --stdio --show-total-period', it was showing the
  number of samples, not the total period (Taeung Song)

Infrastructure changes:

- Add perf_sample dictionary to tracepoint handlers in 'perf script'
  python, which were already present for other types of events
  (hardware, etc) (Arun Kalyanasundaram)

- Make build fail on vendor events JSON parse error (Andi Kleen)

- Adopt strstarts() from the kernel (Arnaldo Carvalho de Melo)

Arch specific changes:

- Set no_aux_samples for the tracking event in Intel PT (Kan Liang)

- Always set no branch for Intel PT dummy event (Kan Liang)

Trivial changes:

- Simplify some error handlers in 'perf script' (Dan Carpenter)

- Add EXCLUDE_EXTLIBS and EXTRA_PERFLIBS to makefile (David Carrillo-Cisneros)

Signed-off-by: Ingo Molnar <mingo@kernel.org>

3 files changed, 35 insertions, 26 deletions

diff --git a/tools/lib/string.c b/tools/lib/string.c
index 8e678af1c6ee..a4246f14ded1 100644
--- a/tools/lib/string.c
+++ b/tools/lib/string.c
@@ -39,27 +39,45 @@ void *memdup(const void *src, size_t len)
  * @s: input string
  * @res: result
  *
- * This routine returns 0 iff the first character is one of 'Yy1Nn0'.
- * Otherwise it will return -EINVAL.  Value pointed to by res is
- * updated upon finding a match.
+ * This routine returns 0 iff the first character is one of 'Yy1Nn0', or
+ * [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL.  Value
+ * pointed to by res is updated upon finding a match.
  */
 int strtobool(const char *s, bool *res)
 {
+	if (!s)
+		return -EINVAL;
+
 	switch (s[0]) {
 	case 'y':
 	case 'Y':
 	case '1':
 		*res = true;
-		break;
+		return 0;
 	case 'n':
 	case 'N':
 	case '0':
 		*res = false;
-		break;
+		return 0;
+	case 'o':
+	case 'O':
+		switch (s[1]) {
+		case 'n':
+		case 'N':
+			*res = true;
+			return 0;
+		case 'f':
+		case 'F':
+			*res = false;
+			return 0;
+		default:
+			break;
+		}
 	default:
-		return -EINVAL;
+		break;
 	}
-	return 0;
+
+	return -EINVAL;
 }
 
 /**
@@ -87,12 +105,3 @@ size_t __weak strlcpy(char *dest, const char *src, size_t size)
 	}
 	return ret;
 }
-
-int prefixcmp(const char *str, const char *prefix)
-{
-	for (; ; str++, prefix++)
-		if (!*prefix)
-			return 0;
-		else if (*str != *prefix)
-			return (unsigned char)*prefix - (unsigned char)*str;
-}
diff --git a/tools/lib/subcmd/help.c b/tools/lib/subcmd/help.c
index ba970a73d053..0310520f918e 100644
--- a/tools/lib/subcmd/help.c
+++ b/tools/lib/subcmd/help.c
@@ -171,7 +171,7 @@ static void list_commands_in_dir(struct cmdnames *cmds,
 	while ((de = readdir(dir)) != NULL) {
 		int entlen;
 
-		if (prefixcmp(de->d_name, prefix))
+		if (!strstarts(de->d_name, prefix))
 			continue;
 
 		astrcat(&buf, de->d_name);
diff --git a/tools/lib/subcmd/parse-options.c b/tools/lib/subcmd/parse-options.c
index 359bfa77f39c..2bd6fd0c1d40 100644
--- a/tools/lib/subcmd/parse-options.c
+++ b/tools/lib/subcmd/parse-options.c
@@ -368,7 +368,7 @@ retry:
 			return 0;
 		}
 		if (!rest) {
-			if (!prefixcmp(options->long_name, "no-")) {
+			if (strstarts(options->long_name, "no-")) {
 				/*
 				 * The long name itself starts with "no-", so
 				 * accept the option without "no-" so that users
@@ -381,7 +381,7 @@ retry:
 					goto match;
 				}
 				/* Abbreviated case */
-				if (!prefixcmp(options->long_name + 3, arg)) {
+				if (strstarts(options->long_name + 3, arg)) {
 					flags |= OPT_UNSET;
 					goto is_abbreviated;
 				}
@@ -406,7 +406,7 @@ is_abbreviated:
 				continue;
 			}
 			/* negated and abbreviated very much? */
-			if (!prefixcmp("no-", arg)) {
+			if (strstarts("no-", arg)) {
 				flags |= OPT_UNSET;
 				goto is_abbreviated;
 			}
@@ -416,7 +416,7 @@ is_abbreviated:
 			flags |= OPT_UNSET;
 			rest = skip_prefix(arg + 3, options->long_name);
 			/* abbreviated and negated? */
-			if (!rest && !prefixcmp(options->long_name, arg + 3))
+			if (!rest && strstarts(options->long_name, arg + 3))
 				goto is_abbreviated;
 			if (!rest)
 				continue;
@@ -456,7 +456,7 @@ static void check_typos(const char *arg, const struct option *options)
 	if (strlen(arg) < 3)
 		return;
 
-	if (!prefixcmp(arg, "no-")) {
+	if (strstarts(arg, "no-")) {
 		fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)", arg);
 		exit(129);
 	}
@@ -464,7 +464,7 @@ static void check_typos(const char *arg, const struct option *options)
 	for (; options->type != OPTION_END; options++) {
 		if (!options->long_name)
 			continue;
-		if (!prefixcmp(options->long_name, arg)) {
+		if (strstarts(options->long_name, arg)) {
 			fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)", arg);
 			exit(129);
 		}
@@ -933,10 +933,10 @@ opt:
 		if (opts->long_name == NULL)
 			continue;
 
-		if (!prefixcmp(opts->long_name, optstr))
+		if (strstarts(opts->long_name, optstr))
 			print_option_help(opts, 0);
-		if (!prefixcmp("no-", optstr) &&
-		    !prefixcmp(opts->long_name, optstr + 3))
+		if (strstarts("no-", optstr) &&
+		    strstarts(opts->long_name, optstr + 3))
 			print_option_help(opts, 0);
 	}