Josh Poimboeuf 9a7c348ba6 ftrace: Add return address pointer to ftrace_ret_stack ... Storing this value will help prevent unwinders from getting out of sync with the function graph tracer ret_stack. Now instead of needing a stateful iterator, they can compare the return address pointer to find the right ret_stack entry. Note that an array of 50 ftrace_ret_stack structs is allocated for every task. So when an arch implements this, it will add either 200 or 400 bytes of memory usage per task (depending on whether it's a 32-bit or 64-bit platform). Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Byungchul Park <byungchul.park@lge.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nilay Vaish <nilayvaish@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/a95cfcc39e8f26b89a430c56926af0bb217bc0a1.1471607358.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2016-08-24 12:15:14 +02:00
..
blktrace.c	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
bpf_trace.c	bpf: Add bpf_probe_write_user BPF helper to be called in tracers	2016-07-25 18:07:48 -07:00
ftrace.c	ftrace: Move toplevel init out of ftrace_init_tracefs()	2016-07-05 10:47:03 -04:00
Kconfig	ftrace: Remove CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST from config	2016-08-24 12:15:13 +02:00
Makefile	Makefile: Mute warning for __builtin_return_address(>0) for tracing only	2016-08-02 12:57:48 -04:00
power-traces.c
ring_buffer_benchmark.c
ring_buffer.c
rpm-traces.c
trace_benchmark.c
trace_benchmark.h
trace_branch.c
trace_clock.c
trace_entries.h	ftrace: Reduce size of function graph entries	2016-07-05 17:28:30 -04:00
trace_event_perf.c
trace_events_filter_test.h
trace_events_filter.c
trace_events_hist.c	tracing: Fix use-after-free in hist_register_trigger()	2016-08-02 15:16:30 -04:00
trace_events_trigger.c
trace_events.c	tracing: Show the preempt count of when the event was called	2016-06-20 09:54:21 -04:00
trace_export.c
trace_functions_graph.c	ftrace: Add return address pointer to ftrace_ret_stack	2016-08-24 12:15:14 +02:00
trace_functions.c	ftrace: Have set_ftrace_pid use the bitmap like events do	2016-06-20 09:54:19 -04:00
trace_irqsoff.c
trace_kdb.c
trace_kprobe.c	tracing: expose current->comm to [ku]probe events	2016-06-20 09:54:19 -04:00
trace_mmiotrace.c	tracing: Expose CPU physical addresses (resource values) for PCI devices	2016-06-20 09:54:22 -04:00
trace_nop.c
trace_output.c
trace_output.h
trace_printk.c	tracing: Handle NULL formats in hold_module_trace_bprintk_format()	2016-06-20 09:46:12 -04:00
trace_probe.c	tracing: expose current->comm to [ku]probe events	2016-06-20 09:54:19 -04:00
trace_probe.h	tracing: expose current->comm to [ku]probe events	2016-06-20 09:54:19 -04:00
trace_sched_switch.c
trace_sched_wakeup.c
trace_selftest_dynamic.c
trace_selftest.c
trace_seq.c
trace_stack.c
trace_stat.c
trace_stat.h
trace_syscalls.c
trace_uprobe.c
trace.c	tracing: Using for_each_set_bit() to simplify trace_pid_write()	2016-07-05 11:22:40 -04:00
trace.h	ftrace: Reduce size of function graph entries	2016-07-05 17:28:30 -04:00
tracing_map.c
tracing_map.h