perf trace beauty mmap: Ignore 'fd' and 'offset' args for MAP_ANONYMOUS

acmel · acmel · commit d57da8c9a5e1 · 2017-07-20T09:55:51.000-03:00
Just suppress them, not used by the kernel. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-atpt07y2x9a8ttlwja94ow3j@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/trace/beauty/mmap.c b/tools/perf/trace/beauty/mmap.c
@@ -34,6 +34,9 @@ static size_t syscall_arg__scnprintf_mmap_flags(char *bf, size_t size,
 {
 	int printed = 0, flags = arg->val;
 
+	if (flags & MAP_ANONYMOUS)
+		arg->mask |= (1 << 4) | (1 << 5); /* Mask 4th ('fd') and 5th ('offset') args, ignored */
+
 #define	P_MMAP_FLAG(n) \
 	if (flags & MAP_##n) { \
 		printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \

Original file line number	Diff line number	Diff line change
`@@ -34,6 +34,9 @@ static size_t syscall_arg__scnprintf_mmap_flags(char *bf, size_t size,`
`34`	`34`	`{`
`35`	`35`	`int printed = 0, flags = arg->val;`
`36`	`36`
	`37`	`+ if (flags & MAP_ANONYMOUS)`
	`38`	`+ arg->mask \|= (1 << 4) \| (1 << 5); /* Mask 4th ('fd') and 5th ('offset') args, ignored */`
	`39`	`+`
`37`	`40`	`#define P_MMAP_FLAG(n) \`
`38`	`41`	`if (flags & MAP_##n) { \`
`39`	`42`	`printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "\|" : "", #n); \`