Commit-ID: 864256255597aad86abcecbe6c53da8852ded15b Gitweb: http://git.kernel.org/tip/864256255597aad86abcecbe6c53da8852ded15b Author: Masami Hiramatsu <mhira...@kernel.org> AuthorDate: Thu, 18 Aug 2016 17:58:15 +0900 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Tue, 23 Aug 2016 15:39:57 -0300
ftrace: probe: Add README entries for k/uprobe-events Add README entries for kprobe-events and uprobe-events. This allows user to check what options can be acceptable for running kernel. E.g. perf tools can choose correct types for the kernel. Signed-off-by: Masami Hiramatsu <mhira...@kernel.org> Acked-by: Steven Rostedt <rost...@goodmis.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Hemant Kumar <hem...@linux.vnet.ibm.com> Cc: Naohiro Aota <naohiro.a...@hgst.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Wang Nan <wangn...@huawei.com> Link: http://lkml.kernel.org/r/147151069524.12957.12957179170304055028.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- kernel/trace/trace.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index dade4c9..1e2ce3b 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4123,6 +4123,30 @@ static const char readme_msg[] = "\t\t\t traces\n" #endif #endif /* CONFIG_STACK_TRACER */ +#ifdef CONFIG_KPROBE_EVENT + " kprobe_events\t\t- Add/remove/show the kernel dynamic events\n" + "\t\t\t Write into this file to define/undefine new trace events.\n" +#endif +#ifdef CONFIG_UPROBE_EVENT + " uprobe_events\t\t- Add/remove/show the userspace dynamic events\n" + "\t\t\t Write into this file to define/undefine new trace events.\n" +#endif +#if defined(CONFIG_KPROBE_EVENT) || defined(CONFIG_UPROBE_EVENT) + "\t accepts: event-definitions (one definition per line)\n" + "\t Format: p|r[:[<group>/]<event>] <place> [<args>]\n" + "\t -:[<group>/]<event>\n" +#ifdef CONFIG_KPROBE_EVENT + "\t place: [<module>:]<symbol>[+<offset>]|<memaddr>\n" +#endif +#ifdef CONFIG_UPROBE_EVENT + "\t place: <path>:<offset>\n" +#endif + "\t args: <name>=fetcharg[:type]\n" + "\t fetcharg: %<register>, @<address>, @<symbol>[+|-<offset>],\n" + "\t $stack<index>, $stack, $retval, $comm\n" + "\t type: s8/16/32/64, u8/16/32/64, x8/16/32/64, string,\n" + "\t b<bit-width>@<bit-offset>/<container-size>\n" +#endif " events/\t\t- Directory containing all trace event subsystems:\n" " enable\t\t- Write 0/1 to enable/disable tracing of all events\n" " events/<system>/\t- Directory containing all trace events for <system>:\n"
