On 2024/9/4 14:58, Sven Schnelle wrote:
Add a config option to disable/enable function argument
printing support during runtime.
Signed-off-by: Sven Schnelle <[email protected]>
---
kernel/trace/Kconfig | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 721c3b221048..8b9b6cdf39ac 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -242,6 +242,18 @@ config FUNCTION_GRAPH_RETVAL
enable it via the trace option funcgraph-retval.
See Documentation/trace/ftrace.rst
+config FUNCTION_TRACE_ARGS
+ bool "Kernel Function Tracer Arguments"
+ depends on HAVE_FUNCTION_ARG_ACCESS_API
+ depends on DEBUG_INFO_BTF && BPF_SYSCALL
Nice feature!
Just a nit, DEBUG_INFO_BTF currently depends on BPF_SYSCALL,
so BPF_SYSCALL may not be necessary here. This feature
also doesn't seem to depend on bpf.
+ default n
+ help
+ Support recording and printing of function arguments when using
+ the function tracer or function graph tracer. This feature is off
+ by default, and can be enabled via the trace option func-args (for
+ the function tracer) and funcgraph-args (for the function graph
+ tracer).
+
config DYNAMIC_FTRACE
bool "enable/disable function tracing dynamically"
depends on FUNCTION_TRACER
--
Thanks,
Zheng Yejian
