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authorMasami Hiramatsu <mhiramat@kernel.org>2016-08-18 17:58:47 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-08-23 17:06:37 -0300
commit925437872525ee229736a9a8bdf804fc98f75b44 (patch)
treea2e81893c0b0f843b972202d4b79db3325d5bdc7 /tools/perf/util/probe-finder.c
parentperf probe: Add supported for type casting by the running kernel (diff)
downloadlinux-dev-925437872525ee229736a9a8bdf804fc98f75b44.tar.xz
linux-dev-925437872525ee229736a9a8bdf804fc98f75b44.zip
perf probe: Support hexadecimal casting
Support hexadecimal unsigned integer casting by 'x'. This allows user to explicitly specify the output format of the probe arguments as hexadecimal. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Naohiro Aota <naohiro.aota@hgst.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/147151072679.12957.4458656416765710753.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/probe-finder.c')
-rw-r--r--tools/perf/util/probe-finder.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 24dbe23e010c..f18cd6bbada9 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -298,13 +298,13 @@ static int convert_variable_type(Dwarf_Die *vr_die,
char sbuf[STRERR_BUFSIZE];
int bsize, boffs, total;
int ret;
- char sign;
+ char prefix;
/* TODO: check all types */
- if (cast && strcmp(cast, "string") != 0 &&
+ if (cast && strcmp(cast, "string") != 0 && strcmp(cast, "x") != 0 &&
strcmp(cast, "s") != 0 && strcmp(cast, "u") != 0) {
/* Non string type is OK */
- /* and respect signedness cast */
+ /* and respect signedness/hexadecimal cast */
tvar->type = strdup(cast);
return (tvar->type == NULL) ? -ENOMEM : 0;
}
@@ -366,11 +366,14 @@ static int convert_variable_type(Dwarf_Die *vr_die,
}
if (cast && (strcmp(cast, "u") == 0))
- sign = 'u';
+ prefix = 'u';
else if (cast && (strcmp(cast, "s") == 0))
- sign = 's';
+ prefix = 's';
+ else if (cast && (strcmp(cast, "x") == 0) &&
+ probe_type_is_available(PROBE_TYPE_X))
+ prefix = 'x';
else
- sign = die_is_signed_type(&type) ? 's' : 'u';
+ prefix = die_is_signed_type(&type) ? 's' : 'u';
ret = dwarf_bytesize(&type);
if (ret <= 0)
@@ -384,7 +387,7 @@ static int convert_variable_type(Dwarf_Die *vr_die,
dwarf_diename(&type), MAX_BASIC_TYPE_BITS);
ret = MAX_BASIC_TYPE_BITS;
}
- ret = snprintf(buf, 16, "%c%d", sign, ret);
+ ret = snprintf(buf, 16, "%c%d", prefix, ret);
formatted:
if (ret < 0 || ret >= 16) {