[0/3] libtracefs: Facilitate adding and removing kprobes

Message

Steven Rostedt June 29, 2021, 8:53 p.m. UTC

Add a tracefs_kprobe_raw() to facilitate adding kprobe events. It's
denoted as "raw" because it still requires knowing the complex format of
a kprobe, but at least it helps with other formats:

 p:[[system/]event] addr fmt

The user only needs to know the "fmt" part above, and not worry about
what file to open, or how to open it.

Also add a tracefs_kprobe_clear() to clear all kprobes and a
tracefs_kprobe_clear_probe() to clear an individual kprobe. Both have a
"force" parameter, that if set, will then try to disable the kprobe in
all instances (including the top) and then remove the kprobe(s).

(Man pages coming after this).

Steven Rostedt (VMware) (3):
  libtracefs: Implement tracefs_kprobe_raw()
  libtracefs: Implement tracefs_kprobe_clear() to remove all kprobes
  libtracefs: Implement tracefs_kprobe_clear_probe()

 include/tracefs.h     |   5 +
 src/Makefile          |   1 +
 src/tracefs-kprobes.c | 242 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 248 insertions(+)
 create mode 100644 src/tracefs-kprobes.c