Jiri Olsa eda1e32855 tracing: handle broken names in ftrace filter ...

If one filter item (for set_ftrace_filter and set_ftrace_notrace) is being
setup by more than 1 consecutive writes (FTRACE_ITER_CONT flag), it won't
be handled corretly.

I used following program to test/verify:

[snip]
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>

int main(int argc, char **argv)
{
        int fd, i;
        char *file = argv[1];

        if (-1 == (fd = open(file, O_WRONLY))) {
                perror("open failed");
                return -1;
        }

        for(i = 0; i < (argc - 2); i++) {
                int len = strlen(argv[2+i]);
                int cnt, off = 0;

                while(len) {
                        cnt = write(fd, argv[2+i] + off, len);
                        len -= cnt;
                        off += cnt;
                }
        }

        close(fd);
        return 0;
}
[snip]

before change:
sh-4.0# echo > ./set_ftrace_filter
sh-4.0# /test ./set_ftrace_filter "sys" "_open "
sh-4.0# cat ./set_ftrace_filter
#### all functions enabled ####
sh-4.0#

after change:
sh-4.0# echo > ./set_ftrace_notrace
sh-4.0# test ./set_ftrace_notrace "sys" "_open "
sh-4.0# cat ./set_ftrace_notrace
sys_open
sh-4.0#

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
LKML-Reference: <20090811152904.GA26065@jolsa.lab.eng.brq.redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

2009-08-18 20:39:48 -04:00

..

blktrace.c

Remove double removal of blktrace directory

2009-08-12 18:50:08 +02:00

ftrace.c

tracing: handle broken names in ftrace filter

2009-08-18 20:39:48 -04:00

Kconfig

tracing/fastboot: Document the need of initcall_debug

2009-06-29 10:22:10 +02:00

kmemtrace.c

cpumask: use new operators in kernel/trace

2009-06-15 11:36:42 -04:00

Makefile

tracing/events: convert block trace points to TRACE_EVENT()

2009-06-09 12:34:23 -04:00

ring_buffer_benchmark.c

ring-buffer: have benchmark test print to trace buffer

2009-06-17 17:01:09 -04:00

ring_buffer.c

ring-buffer: Fix memleak in ring_buffer_free()

2009-08-07 12:46:39 -04:00

trace_boot.c

tracing: use macros to denote usec and nsec per second

2009-04-07 14:43:06 +02:00

trace_branch.c

Merge branch 'linus' into tracing/core

2009-05-07 11:17:34 +02:00

trace_clock.c

tracing: fix four sparse warnings

2009-03-22 18:16:54 +01:00

trace_event_profile.c

ftrace: Fix perf-tracepoint OOPS

2009-08-06 06:26:09 +02:00

trace_event_types.h

trace_export: Repair missed fields

2009-06-26 20:48:40 +02:00

trace_events_filter.c

tracing/filters: Always free pred on filter_add_subsystem_pred() failure

2009-08-08 17:56:13 +02:00

trace_events.c

ftrace: Fix perf-tracepoint OOPS

2009-08-06 06:26:09 +02:00

trace_export.c

tracing/filters: distinguish between signed and unsigned fields

2009-04-29 14:06:03 +02:00

trace_functions_graph.c

tracing: Fix invalid function_graph entry

2009-07-28 23:17:23 +02:00

trace_functions.c

tracing/function: Fix the return value of ftrace_trace_onoff_callback()

2009-07-16 23:34:32 -04:00

trace_hw_branches.c

Merge branch 'tracing/hw-branch-tracing' into tracing/core

2009-05-07 13:36:22 +02:00

trace_irqsoff.c

tracing: have latency tracers set the latency format

2009-03-04 22:15:30 -05:00

trace_mmiotrace.c

tracing: use macros to denote usec and nsec per second

2009-04-07 14:43:06 +02:00

trace_nop.c

tracing/ftrace: make nop-tracer use polling wait for events on pipe

2009-03-23 09:22:15 +01:00

trace_output.c

tracing: Fix trace_print_seq()

2009-07-02 08:51:13 +02:00

trace_output.h

tracing: add protection around module events unload

2009-06-09 17:29:07 -04:00

trace_power.c

Merge branch 'linus' into tracing/core

2009-05-07 11:17:34 +02:00

trace_printk.c

tracing: show proper address for trace-printk format

2009-07-23 10:07:17 -04:00

trace_sched_switch.c

tracing/events: move trace point headers into include/trace/events

2009-04-14 22:05:43 -04:00

trace_sched_wakeup.c

tracing/wakeup: move access to wakeup_cpu into spinlock

2009-04-23 23:01:36 -04:00

trace_selftest_dynamic.c

ftrace: fix dynamic ftrace selftest

2008-05-23 21:13:23 +02:00

trace_selftest.c

x86, hw-branch-tracer: allocate selftest iterator on heap

2009-04-07 13:36:21 +02:00

trace_stack.c

trace_stack: Fix seqfile memory leak

2009-07-23 09:52:09 -04:00

trace_stat.c

tracing/stat: Fix seqfile memory leak

2009-07-23 09:53:55 -04:00

trace_stat.h

tracing: add handler to trace_stat

2009-03-24 23:22:58 -04:00

trace_syscalls.c

tracing/syscalls: use a dedicated file header

2009-04-09 05:43:32 +02:00

trace_sysprof.c

Merge branch 'timers-for-linus-migration' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-15 10:06:19 -07:00

trace_workqueue.c

trace_workqueue: remove blank line between each cpu

2009-06-02 01:14:26 +02:00

trace.c

ftrace: Unify effect of writing to trace_options and option/*

2009-08-18 02:07:04 +02:00

trace.h

perf_counter: Fix/complete ftrace event records sampling

2009-08-09 12:53:48 +02:00