Steven Rostedt (Red Hat)
4fc409048d
ftrace: Fix checking of trampoline ftrace_ops in finding trampoline ...
When modifying code, ftrace has several checks to make sure things
are being done correctly. One of them is to make sure any code it
modifies is exactly what it expects it to be before it modifies it.
In order to do so with the new trampoline logic, it must be able
to find out what trampoline a function is hooked to in order to
see if the code that hooks to it is what's expected.
The logic to find the trampoline from a record (accounting descriptor
for a function that is hooked) needs to only look at the "old_hash"
of an ops that is being modified. The old_hash is the list of function
an ops is hooked to before its update. Since a record would only be
pointing to an ops that is being modified if it was already hooked
before.
Currently, it can pick a modified ops based on its new functions it
will be hooked to, and this picks the wrong trampoline and causes
the check to fail, disabling ftrace.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
ftrace: squash into ordering of ops for modification
2014-10-24 16:53:11 -04:00
Most of the changes were largely clean ups, and some documentation.
2014-04-03 10:26:31 -07:00
ftrace: Fix checking of trampoline ftrace_ops in finding trampoline
2014-10-24 16:53:11 -04:00
tracing: Remove function_trace_stop and HAVE_FUNCTION_TRACE_MCOUNT_TEST
2014-07-18 13:58:12 -04:00
tracing: Move the trace_seq_* functions into its own trace_seq.c file
2014-07-01 07:13:35 -04:00
ring-buffer: Fix infinite spin in reading buffer
2014-10-02 16:51:18 -04:00
sched, cleanup, treewide: Remove set_current_state(TASK_RUNNING) after schedule()
2014-09-19 12:35:17 +02:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-08-05 17:46:42 -07:00
tracing: let user specify tracing_thresh after selecting function_graph
2014-07-18 15:48:52 -04:00
tracing: Only calculate stats of tracepoint benchmarks for 2^32 times
2014-06-06 00:41:38 -04:00
tracing: Add tracepoint benchmark tracepoint
2014-05-29 22:49:54 -04:00
tracing: Update event filters for multibuffer
2013-11-05 16:50:20 -05:00
tracing: Fix wraparound problems in "uptime" trace clock
2014-07-21 09:56:12 -04:00
perf: Check permission only for parent tracepoint event
2014-07-28 10:01:38 +02:00
tracing: Robustify wait loop
2014-10-08 19:51:01 -04:00
tracing: Kill "filter_string" arg of replace_preds()
2014-07-16 14:58:53 -04:00
tracing: Use rcu_dereference_sched() for trace event triggers
2014-05-02 23:12:42 -04:00
tracing: Fix anonymous unions in struct ftrace_event_call
2014-04-09 20:02:55 -04:00
tracing: Remove mock up poll wait function
2014-04-30 08:40:05 -04:00
tracing: Convert local function_graph functions to static
2014-07-18 21:16:06 -04:00
tracing: Allow irq/preempt tracers to be used by instances
2014-04-21 13:59:29 -04:00
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-06-12 19:18:49 -07:00
tracing: Update event filters for multibuffer
2013-11-05 16:50:20 -05:00
tracing: Remove mock up poll wait function
2014-04-30 08:40:05 -04:00
tracing: Add trace_seq_buffer_ptr() helper function
2014-07-01 07:13:39 -04:00
tracing: Make trace_seq_putmem_hex() more robust
2014-07-01 07:13:37 -04:00
kprobes, ftrace: Use NOKPROBE_SYMBOL macro in ftrace
2014-04-24 10:26:39 +02:00
kprobes, ftrace: Use NOKPROBE_SYMBOL macro in ftrace
2014-04-24 10:26:39 +02:00
tracing: Update event filters for multibuffer
2013-11-05 16:50:20 -05:00
tracing: Remove mock up poll wait function
2014-04-30 08:40:05 -04:00
Seems that Peter Zijlstra added a new check that is making old
2014-10-12 07:28:55 -04:00
tracing: Remove trace_seq_reserve()
2014-07-01 07:13:37 -04:00
sched: Add helper for task stack page overrun checking
2014-09-19 12:35:23 +02:00
kernel: trace_syscalls: Replace rcu_assign_pointer() with RCU_INIT_POINTER()
2014-09-10 10:48:47 -04:00
tracing/uprobes: Kill the dead TRACE_EVENT_FL_USE_CALL_FILTER logic
2014-07-16 14:25:19 -04:00
4fc409048d