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new b3e1004658 sched_note: add function auto-tracing
b3e1004658 is described below
commit b3e100465897fa1c949374b0de615cf87d02f852
Author: yinshengkai <[email protected]>
AuthorDate: Thu Apr 6 23:11:02 2023 +0800
sched_note: add function auto-tracing
After enabling this option, you can automatically trace the function
instrumentation without adding tracepoint manually.
This is similar to the Function Trace effect of the linux kernel
Signed-off-by: yinshengkai <[email protected]>
---
drivers/note/note_driver.c | 23 +++++++++++++++++++++++
sched/Kconfig | 14 ++++++++++++++
2 files changed, 37 insertions(+)
diff --git a/drivers/note/note_driver.c b/drivers/note/note_driver.c
index 210d24e971..ee47b5c779 100644
--- a/drivers/note/note_driver.c
+++ b/drivers/note/note_driver.c
@@ -1987,3 +1987,26 @@ int note_driver_register(FAR struct note_driver_s
*driver)
return -ENOMEM;
}
+
+#ifdef CONFIG_SCHED_INSTRUMENTATION_FUNCTION
+
+/****************************************************************************
+ * Name: __cyg_profile_func_enter
+ ****************************************************************************/
+
+void noinstrument_function
+__cyg_profile_func_enter(void *this_fn, void *call_site)
+{
+ sched_note_string_ip(NOTE_TAG_ALWAYS, (uintptr_t)this_fn, "B");
+}
+
+/****************************************************************************
+ * Name: __cyg_profile_func_exit
+ ****************************************************************************/
+
+void noinstrument_function
+__cyg_profile_func_exit(void *this_fn, void *call_site)
+{
+ sched_note_string_ip(NOTE_TAG_ALWAYS, (uintptr_t)this_fn, "E");
+}
+#endif
diff --git a/sched/Kconfig b/sched/Kconfig
index 7ea9b8bee0..4acb2090b3 100644
--- a/sched/Kconfig
+++ b/sched/Kconfig
@@ -1088,6 +1088,20 @@ config SCHED_INSTRUMENTATION_DUMP
void sched_note_printf(FAR const char *fmt, ...)
printf_like(1, 2);
void sched_note_bprintf(uint32_t module, uint8_t event,
FAR const char *fmt, ...);
+config SCHED_INSTRUMENTATION_FUNCTION
+ bool "Enable function auto-tracing"
+ default n
+ ---help---
+ After enabling this option, you can automatically trace the
function instrumentation without adding tracepoint manually.
+ This is similar to the Function Trace effect of the linux kernel
+ Add CFLAGS += -finstrument-functions to the makefile to track
the required modules.
+ The following compilation option can exclude files that do not
want to be tracked in this module
+ CFLAGS += -finstrument-functions-exclude-file-list=xxx
+ The following compilation option can exclude functions that do
not want to be tracked in this module
+ CFLAGS += -finstrument-functions-exclude-function-list=xxx
+ For a more detailed description of compilation options,
+ refer to the "Program Instrumentation Options" chapter in the
gcc documentation
+
endif # SCHED_INSTRUMENTATION
endmenu # Performance Monitoring
