From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Namhyung Kim <namhyung@kernel.org>,
gopanapalli pradeep <prap_hai@yahoo.com>
Subject: [PATCH 10/10] lib traceevent: Fix get_field_str() for dynamic strings
Date: Thu, 11 Jan 2018 19:47:51 -0500 [thread overview]
Message-ID: <20180112004823.146333275@goodmis.org> (raw)
In-Reply-To: 20180112004741.378806573@goodmis.org
[-- Attachment #1: 0010-lib-traceevent-Fix-get_field_str-for-dynamic-strings.patch --]
[-- Type: text/plain, Size: 1607 bytes --]
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
If a field is a dynamic string, get_field_str() returned just the
offset/size value and not the string. Have it parse the offset/size
correctly to return the actual string. Otherwise filtering fails when trying
to filter fields that are dynamic strings.
Reported-by: gopanapalli pradeep <prap_hai@yahoo.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
tools/lib/traceevent/parse-filter.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
index 2b9048f90bae..431e8b309f6e 100644
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -1877,17 +1877,25 @@ static const char *get_field_str(struct filter_arg *arg, struct pevent_record *r
struct pevent *pevent;
unsigned long long addr;
const char *val = NULL;
+ unsigned int size;
char hex[64];
/* If the field is not a string convert it */
if (arg->str.field->flags & FIELD_IS_STRING) {
val = record->data + arg->str.field->offset;
+ size = arg->str.field->size;
+
+ if (arg->str.field->flags & FIELD_IS_DYNAMIC) {
+ addr = *(unsigned int *)val;
+ val = record->data + (addr & 0xffff);
+ size = addr >> 16;
+ }
/*
* We need to copy the data since we can't be sure the field
* is null terminated.
*/
- if (*(val + arg->str.field->size - 1)) {
+ if (*(val + size - 1)) {
/* copy it */
memcpy(arg->str.buffer, val, arg->str.field->size);
/* the buffer is already NULL terminated */
--
2.13.2
next prev parent reply other threads:[~2018-01-12 0:49 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-12 0:47 [PATCH 00/10] tools lib traceveent: Pull updates from trace-cmd library Steven Rostedt
2018-01-12 0:47 ` [PATCH 01/10] lib, traceevent: Fix bad force_token escape sequence Steven Rostedt
2018-01-12 0:47 ` [PATCH 02/10] lib traceevent: Show value of flags that have not been parsed Steven Rostedt
2018-01-17 16:28 ` [tip:perf/core] tools " tip-bot for Steven Rostedt (VMware)
2018-01-12 0:47 ` [PATCH 03/10] lib traceevent: Print value of unknown symbolic fields Steven Rostedt
2018-01-17 16:28 ` [tip:perf/core] tools " tip-bot for Jan Kiszka
2018-01-12 0:47 ` [PATCH 04/10] lib traceevent: Simplify pointer print logic and fix %pF Steven Rostedt
2018-01-17 16:29 ` [tip:perf/core] tools " tip-bot for Steven Rostedt (VMware)
2018-01-12 0:47 ` [PATCH 05/10] lib traceevent: Handle new pointer processing of bprint strings Steven Rostedt
2018-01-17 16:29 ` [tip:perf/core] tools " tip-bot for Steven Rostedt (VMware)
2018-01-12 0:47 ` [PATCH 06/10] lib traceevent: Show contents (in hex) of data of unrecognized type records Steven Rostedt
2018-01-17 16:30 ` [tip:perf/core] tools " tip-bot for Steven Rostedt (VMware)
2018-01-12 0:47 ` [PATCH 07/10] lib traceevent: Use asprintf when possible Steven Rostedt
2018-01-17 16:30 ` [tip:perf/core] tools " tip-bot for Federico Vaga
2018-01-12 0:47 ` [PATCH 08/10] lib traceevent: Add UL suffix to MISSING_EVENTS Steven Rostedt
2018-01-17 16:31 ` [tip:perf/core] tools " tip-bot for Michael Sartain
2018-01-12 0:47 ` [PATCH 09/10] lib traceeevent: Fix missing break in FALSE case of pevent_filter_clear_trivial() Steven Rostedt
2017-04-26 14:55 ` [PATCH] parse-events: Fix the FALSE case in pevent_filter_clear_trivial() Taeung Song
2018-01-17 16:31 ` [tip:perf/core] tools lib traceevent: Fix missing break in FALSE case of pevent_filter_clear_trivial() tip-bot for Taeung Song
2018-01-12 1:00 ` [PATCH 09/10] lib traceeevent: " Taeung Song
2018-01-12 1:14 ` Steven Rostedt
2018-01-12 16:02 ` Arnaldo Carvalho de Melo
2018-01-12 0:47 ` Steven Rostedt [this message]
2018-01-17 16:31 ` [tip:perf/core] tools lib traceevent: Fix get_field_str() for dynamic strings tip-bot for Steven Rostedt (VMware)
2018-01-17 6:02 ` [PATCH 00/10] tools lib traceveent: Pull updates from trace-cmd library Namhyung Kim
-- strict thread matches above, loose matches on Subject: below --
2017-10-16 16:55 [PATCH v2 0/4] trace-cmd: Fixes for four minor bugs Michael Sartain
2017-10-16 16:55 ` [PATCH v2 1/4] trace-cmd: Fix incorrect malloc size arg: *item instead of item Michael Sartain
2017-10-16 16:55 ` [PATCH v2 2/4] trace-cmd: Fix NULL pointer being passed to memcpy Michael Sartain
2017-10-16 16:55 ` [PATCH v2 3/4] trace-cmd: Add UL suffix to MISSING_EVENTS since ints shouldn't be left shifted by 31 Michael Sartain
2017-10-16 16:55 ` [PATCH v2 4/4] trace-cmd: Use unsigned values in Hsieh's trace_hash fast hash function Michael Sartain
2017-09-28 20:13 [PATCH][trace-cmd] Print value of unknown symbolic fields Jan Kiszka
2017-10-03 22:46 ` Steven Rostedt
2017-10-03 23:12 ` Steven Rostedt
2017-08-02 22:15 [PATCH V3 1/2] use direname instead of custom code Federico Vaga
2017-08-02 22:15 ` [PATCH V3 2/2] It makes the code clearer and less error prone Federico Vaga
2017-08-14 17:33 ` Steven Rostedt
2017-08-15 7:25 ` Federico Vaga
2017-11-08 18:50 ` Steven Rostedt
2017-08-02 23:48 ` [PATCH V3 1/2] trace-cmd record: use direname instead of custom code Steven Rostedt
2017-08-14 17:14 ` [PATCH V3 1/2] " Steven Rostedt
2017-06-15 0:27 [PATCH v3 0/6] trace-cmd: escape sequence, EINTR, error checking bug fixes Michael Sartain
2017-06-15 0:27 ` [PATCH v3 1/6] Fix bad force_token escape sequence Michael Sartain
2018-01-17 16:28 ` [tip:perf/core] tools lib traceevent: " tip-bot for Michael Sartain
2017-06-15 0:27 ` [PATCH v3 2/6] Fix unsigned return values being error checked as negative Michael Sartain
2017-06-15 0:27 ` [PATCH v3 3/6] Handle EINTR signal interrupts for read, write, open calls Michael Sartain
2017-06-21 13:26 ` Steven Rostedt
2017-06-15 0:27 ` [PATCH v3 4/6] Fix read / write data offsets in read / write loops Michael Sartain
2017-06-21 13:29 ` Steven Rostedt
2017-06-21 17:36 ` Michael Sartain
2017-06-15 0:28 ` [PATCH v3 5/6] Fix function prototypes for __vwarning, __vpr_stat, and __vdie Michael Sartain
2017-06-15 0:28 ` [PATCH v3 6/6] Fix cases where string literals were passed as string format args Michael Sartain
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