Messages in this thread | | | From | Frederic Weisbecker <> | Subject | [GIT PULL] tracing/kprobes: Add dynamic tracepoints + instruction decoder | Date | Thu, 27 Aug 2009 04:31:59 +0200 |
| |
Ingo,
This is the kprobes tracing pile of patches. I've tested it successfully by setting some kprobes through debugfs by hand.
It brings no known regressions.
However, the stress test provided by Masami have revealed some unstable points. Some symbols are unsafe to probe and raise probing recursion.
I've added a tiny patch in the series that helps identifying the kprobe that has raised such situation. For example it has learned me today that it's unsafe to trace ret_from_exception() (obviously: it's on the int 3 handler path).
Anyway, we have all the tools to debug that and easily find the fragile points to probe. It's then just a matter of investigation and stress tests now.
And because the pile of patches becomes big enough, I've thought it could be time to do a pull request for -tip for it to have a private branch and get fixes over the time.
Tell me if that's a problem and we can delay the pull request until we fix the recursive points problems.
Thanks, Frederic.
The following changes since commit 35dce1a99d010f3d738af4ce1b9b77302fdfe69c: Ingo Molnar (1): Merge branch 'tracing/core' of git://git.kernel.org/.../frederic/random-tracing into tracing/core
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git tracing/kprobes
Frederic Weisbecker (1): tracing/kprobes: Dump the culprit kprobe in case of kprobe recursion
Masami Hiramatsu (17): x86: Instruction decoder API x86: X86 instruction decoder build-time selftest kprobes: Checks probe address is instruction boudary on x86 kprobes: Cleanup fix_riprel() using insn decoder on x86 x86: Add pt_regs register and stack access APIs tracing: Ftrace dynamic ftrace_event_call support tracing: Introduce TRACE_FIELD_ZERO() macro tracing: Add kprobe-based event tracer tracing: Add kprobe-based event tracer documentation tracing: Kprobe-tracer supports more than 6 arguments tracing: Generate names for each kprobe event automatically tracing: Kprobe tracer assigns new event ids for each event tracing: Add kprobes event profiling interface x86: Fix x86 instruction decoder selftest to check only .text x86: Check awk features before generating inat-tables.c tracing/kprobes: Fix format typo in trace_kprobes tracing/kprobes: Change trace_arg to probe_arg
Documentation/trace/kprobetrace.txt | 148 ++++ arch/x86/Kconfig.debug | 9 + arch/x86/Makefile | 3 + arch/x86/include/asm/inat.h | 188 ++++++ arch/x86/include/asm/inat_types.h | 29 + arch/x86/include/asm/insn.h | 143 ++++ arch/x86/include/asm/ptrace.h | 62 ++ arch/x86/kernel/kprobes.c | 209 +++--- arch/x86/kernel/ptrace.c | 112 +++ arch/x86/lib/Makefile | 13 + arch/x86/lib/inat.c | 78 +++ arch/x86/lib/insn.c | 464 +++++++++++++ arch/x86/lib/x86-opcode-map.txt | 719 ++++++++++++++++++++ arch/x86/tools/Makefile | 15 + arch/x86/tools/distill.awk | 42 ++ arch/x86/tools/gen-insn-attr-x86.awk | 334 +++++++++ arch/x86/tools/test_get_len.c | 113 ++++ include/linux/ftrace_event.h | 19 +- include/linux/kprobes.h | 2 + include/linux/syscalls.h | 4 +- include/trace/ftrace.h | 16 +- include/trace/syscall.h | 11 +- kernel/kprobes.c | 7 + kernel/trace/Kconfig | 12 + kernel/trace/Makefile | 1 + kernel/trace/trace.h | 24 + kernel/trace/trace_event_types.h | 4 +- kernel/trace/trace_events.c | 121 +++- kernel/trace/trace_export.c | 34 +- kernel/trace/trace_kprobe.c | 1231 ++++++++++++++++++++++++++++++++++ kernel/trace/trace_syscalls.c | 20 +- 31 files changed, 3991 insertions(+), 196 deletions(-) create mode 100644 Documentation/trace/kprobetrace.txt create mode 100644 arch/x86/include/asm/inat.h create mode 100644 arch/x86/include/asm/inat_types.h create mode 100644 arch/x86/include/asm/insn.h create mode 100644 arch/x86/lib/inat.c create mode 100644 arch/x86/lib/insn.c create mode 100644 arch/x86/lib/x86-opcode-map.txt create mode 100644 arch/x86/tools/Makefile create mode 100644 arch/x86/tools/distill.awk create mode 100644 arch/x86/tools/gen-insn-attr-x86.awk create mode 100644 arch/x86/tools/test_get_len.c create mode 100644 kernel/trace/trace_kprobe.c
| |