diff options
| author |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-12-06 15:18:58 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2022-01-13 16:23:05 -0500 |
| commit | 8147dc78e6e4b645f8277bdf377f2193ddfcdee1 (patch) | |
| tree | ffda997448882281bb484cfdc039660d944488cd /kernel/trace/Kconfig | |
| parent | scripts: ftrace - move the sort-processing in ftrace_init (diff) | |
| download | linux-dev-8147dc78e6e4b645f8277bdf377f2193ddfcdee1.tar.xz linux-dev-8147dc78e6e4b645f8277bdf377f2193ddfcdee1.zip | |
ftrace: Add test to make sure compiled time sorts work
Now that ftrace function pointers are sorted at compile time, add a test
that makes sure they are sorted at run time. This test is only run if it is
configured in.
Link: https://lkml.kernel.org/r/20211206151858.4d21a24d@gandalf.local.home
Cc: Yinan Liu <yinan@linux.alibaba.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/Kconfig')
| -rw-r--r-- | kernel/trace/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 420ff4bc67fd..f468767bc287 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -915,6 +915,20 @@ config EVENT_TRACE_TEST_SYSCALLS TBD - enable a way to actually call the syscalls as we test their events +config FTRACE_SORT_STARTUP_TEST + bool "Verify compile time sorting of ftrace functions" + depends on DYNAMIC_FTRACE + depends on BUILDTIME_TABLE_SORT + help + Sorting of the mcount_loc sections that is used to find the + where the ftrace knows where to patch functions for tracing + and other callbacks is done at compile time. But if the sort + is not done correctly, it will cause non-deterministic failures. + When this is set, the sorted sections will be verified that they + are in deed sorted and will warn if they are not. + + If unsure, say N + config RING_BUFFER_STARTUP_TEST bool "Ring buffer startup self test" depends on RING_BUFFER |