From: Tom Zanussi <tom.zanussi@linux.intel.com>
To: rostedt@goodmis.org
Cc: masami.hiramatsu.pt@hitachi.com, namhyung@kernel.org,
josh@joshtriplett.org, andi@firstfloor.org,
mathieu.desnoyers@efficios.com, peterz@infradead.org,
linux-kernel@vger.kernel.org,
Tom Zanussi <tom.zanussi@linux.intel.com>
Subject: [PATCH v15 09/23] tracing: Add hist trigger 'sym' and 'sym-offset' modifiers
Date: Fri, 26 Feb 2016 10:01:12 -0600 [thread overview]
Message-ID: <d3f7d29e9379d637ea2eca1433a429a140d7314e.1456501855.git.tom.zanussi@linux.intel.com> (raw)
In-Reply-To: <cover.1456501855.git.tom.zanussi@linux.intel.com>
In-Reply-To: <cover.1456501855.git.tom.zanussi@linux.intel.com>
Allow users to have address fields displayed as symbols in the output
by appending '.sym' or 'sym-offset' to field names:
# echo hist:keys=aaa.sym,bbb.sym-offset ... \
[ if filter] > event/trigger
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
---
kernel/trace/trace.c | 4 +++-
kernel/trace/trace_events_hist.c | 29 +++++++++++++++++++++++++----
2 files changed, 28 insertions(+), 5 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d6b4692..202220c 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3846,7 +3846,9 @@ static const char readme_msg[] =
"\t table in its entirety to stdout. The default format used to\n"
"\t display a given field can be modified by appending any of the\n"
"\t following modifiers to the field name, as applicable:\n\n"
- "\t .hex display a number as a hex value\n\n"
+ "\t .hex display a number as a hex value\n"
+ "\t .sym display an address as a symbol\n"
+ "\t .sym-offset display an address as a symbol and offset\n\n"
"\t The 'pause' parameter can be used to pause an existing hist\n"
"\t trigger or to start a hist trigger but not log any events\n"
"\t until told to do so. 'continue' can be used to start or\n"
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 734cdce..fd4de16 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -77,10 +77,12 @@ DEFINE_HIST_FIELD_FN(u8);
#define HIST_KEY_SIZE_MAX (MAX_FILTER_STR_VAL + sizeof(u64))
enum hist_field_flags {
- HIST_FIELD_FL_HITCOUNT = 1,
- HIST_FIELD_FL_KEY = 2,
- HIST_FIELD_FL_STRING = 4,
- HIST_FIELD_FL_HEX = 8,
+ HIST_FIELD_FL_HITCOUNT = 1,
+ HIST_FIELD_FL_KEY = 2,
+ HIST_FIELD_FL_STRING = 4,
+ HIST_FIELD_FL_HEX = 8,
+ HIST_FIELD_FL_SYM = 16,
+ HIST_FIELD_FL_SYM_OFFSET = 32,
};
struct hist_trigger_attrs {
@@ -393,6 +395,10 @@ static int create_key_field(struct hist_trigger_data *hist_data,
if (field_str) {
if (strcmp(field_str, "hex") == 0)
flags |= HIST_FIELD_FL_HEX;
+ else if (strcmp(field_str, "sym") == 0)
+ flags |= HIST_FIELD_FL_SYM;
+ else if (strcmp(field_str, "sym-offset") == 0)
+ flags |= HIST_FIELD_FL_SYM_OFFSET;
else {
ret = -EINVAL;
goto out;
@@ -720,6 +726,7 @@ hist_trigger_entry_print(struct seq_file *m,
struct tracing_map_elt *elt)
{
struct hist_field *key_field;
+ char str[KSYM_SYMBOL_LEN];
unsigned int i;
u64 uval;
@@ -735,6 +742,16 @@ hist_trigger_entry_print(struct seq_file *m,
uval = *(u64 *)(key + key_field->offset);
seq_printf(m, "%s: %llx",
key_field->field->name, uval);
+ } else if (key_field->flags & HIST_FIELD_FL_SYM) {
+ uval = *(u64 *)(key + key_field->offset);
+ sprint_symbol_no_offset(str, uval);
+ seq_printf(m, "%s: [%llx] %-45s",
+ key_field->field->name, uval, str);
+ } else if (key_field->flags & HIST_FIELD_FL_SYM_OFFSET) {
+ uval = *(u64 *)(key + key_field->offset);
+ sprint_symbol(str, uval);
+ seq_printf(m, "%s: [%llx] %-55s",
+ key_field->field->name, uval, str);
} else if (key_field->flags & HIST_FIELD_FL_STRING) {
seq_printf(m, "%s: %-50s", key_field->field->name,
(char *)(key + key_field->offset));
@@ -850,6 +867,10 @@ static const char *get_hist_field_flags(struct hist_field *hist_field)
if (hist_field->flags & HIST_FIELD_FL_HEX)
flags_str = "hex";
+ else if (hist_field->flags & HIST_FIELD_FL_SYM)
+ flags_str = "sym";
+ else if (hist_field->flags & HIST_FIELD_FL_SYM_OFFSET)
+ flags_str = "sym-offset";
return flags_str;
}
--
1.9.3
next prev parent reply other threads:[~2016-02-26 16:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-26 16:01 [PATCH 00/23] tracing: 'hist' triggers Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 01/23] tracing: Update some tracing_map constants and comments Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 02/23] tracing: Add 'hist' event trigger command Tom Zanussi
2016-03-02 14:33 ` Steven Rostedt
2016-02-26 16:01 ` [PATCH v15 03/23] tracing: Add hist trigger support for multiple values ('vals=' param) Tom Zanussi
2016-03-02 14:38 ` Steven Rostedt
2016-02-26 16:01 ` [PATCH v15 04/23] tracing: Add hist trigger support for compound keys Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 05/23] tracing: Add hist trigger support for user-defined sorting ('sort=' param) Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 06/23] tracing: Add hist trigger support for pausing and continuing a trace Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 07/23] tracing: Add hist trigger support for clearing " Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 08/23] tracing: Add hist trigger 'hex' modifier for displaying numeric fields Tom Zanussi
2016-02-26 16:01 ` Tom Zanussi [this message]
2016-02-26 16:01 ` [PATCH v15 10/23] tracing: Add hist trigger 'execname' modifier Tom Zanussi
2016-03-02 17:39 ` Steven Rostedt
2016-03-02 19:51 ` Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 11/23] tracing: Add hist trigger 'syscall' modifier Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 12/23] tracing: Add hist trigger support for stacktraces as keys Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 13/23] tracing: Support string type key properly Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 14/23] tracing: Remove restriction on string position in hist trigger keys Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 15/23] tracing: Add enable_hist/disable_hist triggers Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 16/23] tracing: Add 'hist' trigger Documentation Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 17/23] tracing: Add support for multiple hist triggers per event Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 18/23] tracing: Add support for named triggers Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 19/23] tracing: Add support for named hist triggers Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 20/23] kselftests/ftrace : Add event trigger testcases Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 21/23] kselftests/ftrace: Add hist " Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 22/23] tracing: Add hist trigger 'log2' modifier Tom Zanussi
2016-02-26 16:01 ` [PATCH v15 23/23] kselftests/ftrace: Add a test for log2 modifier of hist trigger Tom Zanussi
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