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tracing/fprobe: Support raw tracepoints on future loaded modules

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Support raw tracepoint events on future loaded (unloaded) modules.
This allows user to create raw tracepoint events which can be used from
module's __init functions.

Note: since the kernel does not have any information about the tracepoints
in the unloaded modules, fprobe events can not check whether the tracepoint
exists nor extend the BTF based arguments.

Link: https://lore.kernel.org/all/172397780593.286558.18360375226968537828.stgit@devnote2/

Suggested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
This commit is contained in:
Masami Hiramatsu (Google)
2024-08-18 19:43:26 +09:00
parent 67e9a9ee47
commit 57a7e6de9e
2 changed files with 101 additions and 51 deletions
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1
tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc
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@@ -9,7 +9,6 @@ check_error() { # command-with-error-pos-by-^
check_error 't^100 kfree' # BAD_MAXACT_TYPE
check_error 't ^non_exist_tracepoint' # NO_TRACEPOINT
check_error 't:^/bar kfree' # NO_GROUP_NAME
check_error 't:^12345678901234567890123456789012345678901234567890123456789012345/bar kfree' # GROUP_TOO_LONG