Steven Rostedt (VMware) 1dfb1c7bd6 tracing: Allocate the snapshot buffer before enabling probe ... commit df62db5be2 upstream. Currently the snapshot trigger enables the probe and then allocates the snapshot. If the probe triggers before the allocation, it could cause the snapshot to fail and turn tracing off. It's best to allocate the snapshot buffer first, and then enable the trigger. If something goes wrong in the enabling of the trigger, the snapshot buffer is still allocated, but it can also be freed by the user by writting zero into the snapshot buffer file. Also add a check of the return status of alloc_snapshot(). Fixes: 77fd5c15e3 ("tracing: Add snapshot trigger to function probes") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-04-27 09:09:31 +02:00
..
blktrace.c	Most of the changes are clean ups and small fixes. Some of them have	2015-11-06 13:30:20 -08:00
bpf_trace.c	bpf: make tracing helpers gpl only	2015-10-26 21:53:34 -07:00
ftrace.c	ftrace: Fix removing of second function probe	2017-04-21 09:30:06 +02:00
Kconfig	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-11-10 18:11:41 -08:00
Makefile	Makefile: Mute warning for __builtin_return_address(>0) for tracing only	2016-09-30 10:18:35 +02:00
power-traces.c	PM / sleep: export suspend_resume trace event	2015-01-30 02:10:41 +01:00
ring_buffer_benchmark.c	ring_buffer: Remove unneeded smp_wmb() before wakeup of reader benchmark	2015-11-03 16:19:02 -05:00
ring_buffer.c	ring-buffer: Fix return value check in test_ringbuffer()	2017-04-12 12:38:33 +02:00
rpm-traces.c	PM / Runtime: Introduce trace points for tracing rpm_* functions	2011-09-27 22:53:27 +02:00
trace_benchmark.c	tracing: Only benchmark the time tracepoints take if tracing is on	2015-11-02 13:34:58 -05:00
trace_benchmark.h	tracing: Add tracepoint benchmark tracepoint	2014-05-29 22:49:54 -04:00
trace_branch.c	tracing: Remove {start,stop}_branch_trace	2015-10-21 10:10:09 -04:00
trace_clock.c	tracing: Export tracing clock functions	2015-05-12 15:56:57 -04:00
trace_entries.h	tracing: %pF is only for function pointers	2015-03-25 08:57:22 -04:00
trace_event_perf.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
trace_events_filter_test.h	tracing/filter: Add startup tests for events filter	2011-08-19 14:35:59 -04:00
trace_events_filter.c	tracing: Do not have 'comm' filter override event 'comm' field	2016-03-09 15:34:52 -08:00
trace_events_trigger.c	tracing: Rename ftrace_raw_##call event structures to trace_event_raw_##call	2015-05-13 21:48:40 -04:00
trace_events.c	tracing: Don't display trigger file for events that can't be enabled	2016-05-11 11:21:13 +02:00
trace_export.c	tracing: ftrace_event_is_function() can return boolean	2015-11-02 14:28:05 -05:00
trace_functions_graph.c	fgraph: Handle a case where a tracer ignores set_graph_notrace	2017-01-09 08:07:50 +01:00
trace_functions.c	tracing/trivial: Fix typos and make an int into a bool	2014-11-20 10:05:36 -05:00
trace_irqsoff.c	tracing: Have preempt(irqs)off trace preempt disabled functions	2016-04-12 09:08:59 -07:00
trace_kdb.c	tracing: Move trace_flags from global to a trace_array field	2015-09-30 15:22:55 -04:00
trace_kprobe.c	lib: introduce strncpy_from_unsafe()	2015-08-28 16:27:27 -07:00
trace_mmiotrace.c	tracing: Pass trace_array into trace_buffer_unlock_commit()	2015-09-25 17:38:44 -04:00
trace_nop.c	tracing: Remove unneeded includes of debugfs.h and fs.h	2015-01-22 11:19:48 -05:00
trace_output.c	tracing: Move trace_flags from global to a trace_array field	2015-09-30 15:22:55 -04:00
trace_output.h	tracing: Turn seq_print_user_ip() into a static function	2015-09-28 10:16:12 -04:00
trace_printk.c	tracing: Handle NULL formats in hold_module_trace_bprintk_format()	2016-07-27 09:47:32 -07:00
trace_probe.c	trace: Don't use __weak in header files	2015-03-25 08:57:23 -04:00
trace_probe.h	kernel/trace_probe: is_good_name can be boolean	2015-09-22 13:11:30 -04:00
trace_sched_switch.c	sched/core: Fix trace_sched_switch()	2015-10-06 17:08:15 +02:00
trace_sched_wakeup.c	Most of the changes are clean ups and small fixes. Some of them have	2015-11-06 13:30:20 -08:00
trace_selftest_dynamic.c	ftrace: Add self-tests for multiple function trace users	2011-05-18 19:24:51 -04:00
trace_selftest.c	Seems that Peter Zijlstra added a new check that is making old	2014-10-12 07:28:55 -04:00
trace_seq.c	tracing: use %*pb[l] to print bitmaps including cpumasks and nodemasks	2015-02-13 21:21:37 -08:00
trace_stack.c	tracing/stacktrace: Show entire trace if passed in function not found	2016-02-17 12:30:57 -08:00
trace_stat.c	tracing: Convert the tracing facility over to use tracefs	2015-02-03 12:48:41 -05:00
trace_stat.h	tracing/stat: Add stat_release() callback	2009-07-10 12:14:05 +02:00
trace_syscalls.c	tracing: Move trace_flags from global to a trace_array field	2015-09-30 15:22:55 -04:00
trace_uprobe.c	tracing/uprobes: Do not print '0x (null)' when offset is 0	2015-08-26 10:43:01 -03:00
trace.c	tracing: Allocate the snapshot buffer before enabling probe	2017-04-27 09:09:31 +02:00
trace.h	tracing: Remove unused ftrace_cpu_disabled per cpu variable	2015-11-07 13:25:14 -05:00