Ingo, This patch series extends ftrace function tracing utility to be more dynamic for its users. It allows for data passing to the callback functions, as well as reading regs as if a breakpoint were to trigger at function entry.
The main goal of this patch series was to allow kprobes to use ftrace
as an optimized probe point when a probe is placed on an ftrace nop.
With lots of help from Masami Hiramatsu, and going through lots of
iterations, we finally came up with a good solution.
I've tested it vigorously (although, like always, there may be some
subtle bug), but I feel it is ready for inclussion for the 3.6 merge
window.
Please pull the latest tip/perf/core tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
tip/perf/core
Head SHA1: aa5e57294ac5614ac395a9733d3e050eace4764e
Masami Hiramatsu (5):
ftrace: add ftrace_set_filter_ip() for address based filter
kprobes: cleanup to separate probe-able check
kprobes: Move locks into appropriate functions
kprobes: introduce ftrace based optimization
kprobes/x86: ftrace based optimization for x86
Steven Rostedt (13):
ftrace: Pass ftrace_ops as third parameter to function trace callback
ftrace: Consolidate arch dependent functions with 'list' function
ftrace: Return pt_regs to function trace callback
ftrace/x86_32: Push ftrace_ops in as 3rd parameter to function tracer
ftrace/x86: Add separate function to save regs
ftrace/x86: Add save_regs for i386 function calls
ftrace/x86: Remove function_trace_stop check from graph caller
ftrace: Add default recursion protection for function tracing
ftrace: Only compile ftrace selftest if selftests are enabled
ftrace: Add selftest to test function trace recursion protection
ftrace: Add selftest to test function save-regs support
kprobes: Inverse taking of module_mutex with kprobe_mutex
ftrace: Make ftrace_location() a nop on !DYNAMIC_FTRACE
Uros Bizjak (1):
ftrace/x86_32: Simplify parameter setup for ftrace_regs_caller
----
arch/x86/include/asm/ftrace.h | 49 +++---
arch/x86/include/asm/kprobes.h | 1 +
arch/x86/kernel/entry_32.S | 75 ++++++++-
arch/x86/kernel/entry_64.S | 96 +++++++++--
arch/x86/kernel/ftrace.c | 73 ++++++++-
arch/x86/kernel/kprobes.c | 48 ++++++
include/linux/ftrace.h | 158 ++++++++++++++++--
include/linux/kprobes.h | 27 ++++
kernel/kprobes.c | 250 ++++++++++++++++++++--------
kernel/trace/Makefile | 2 +
kernel/trace/ftrace.c | 322 ++++++++++++++++++++++++++++---------
kernel/trace/trace.h | 2 +-
kernel/trace/trace_event_perf.c | 3 +-
kernel/trace/trace_events.c | 4 +-
kernel/trace/trace_functions.c | 14 +-
kernel/trace/trace_irqsoff.c | 5 +-
kernel/trace/trace_sched_wakeup.c | 5 +-
kernel/trace/trace_selftest.c | 277 ++++++++++++++++++++++++++++++-
kernel/trace/trace_stack.c | 4 +-
19 files changed, 1199 insertions(+), 216 deletions(-)
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