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tracing: Add '__rel_loc' using trace event macros

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Add '__rel_loc' using trace event macros. These macros are usually
not used in the kernel, except for testing purpose.
This also add "rel_" variant of macros for dynamic_array string,
and bitmask.

Link: https://lkml.kernel.org/r/163757342119.510314.816029622439099016.stgit@devnote2

Cc: Beau Belgrave <beaub@linux.microsoft.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu
2021-11-22 18:30:21 +09:00
committed by Steven Rostedt (VMware)
parent 05770dd0ad
commit 55de2c0b56
4 changed files with 153 additions and 2 deletions
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16
include/trace/bpf_probe.h
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@@ -21,6 +21,22 @@
#undef __get_bitmask
#define __get_bitmask(field) (char *)__get_dynamic_array(field)
#undef __get_rel_dynamic_array
#define __get_rel_dynamic_array(field) \
((void *)(&__entry->__rel_loc_##field) + \
sizeof(__entry->__rel_loc_##field) + \
(__entry->__rel_loc_##field & 0xffff))
#undef __get_rel_dynamic_array_len
#define __get_rel_dynamic_array_len(field) \
((__entry->__rel_loc_##field >> 16) & 0xffff)
#undef __get_rel_str
#define __get_rel_str(field) ((char *)__get_rel_dynamic_array(field))
#undef __get_rel_bitmask
#define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field)
#undef __perf_count
#define __perf_count(c) (c)