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perf probe: Support hexadecimal casting

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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>
This commit is contained in:
Masami Hiramatsu
2016-08-18 17:58:47 +09:00
committed by Arnaldo Carvalho de Melo
parent 180b20616c
commit 9254378725
2 changed files with 12 additions and 9 deletions
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17
tools/perf/util/probe-finder.c
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@@ -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) {