diff options
| author | Josef Bacik <jbacik@fb.com> | 2014-09-24 16:14:12 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-01 13:17:29 +0200 |
| commit | 5093d01f0809e1236d2a4351b1c2533b7234e3f8 (patch) | |
| tree | e603b80db76503a89a384d8c045b423dec9a5abf | |
| parent | 0c81861ae9036f7343b0f8a4640dedd923af4f9b (diff) | |
tracing: Set kernel_stack's caller size properly
[ Upstream commit cbc3b92ce037f5e7536f6db157d185cd8b8f615c ]
I noticed when trying to use the trace-cmd python interface that reading the raw
buffer wasn't working for kernel_stack events. This is because it uses a
stubbed version of __dynamic_array that doesn't do the __data_loc trick and
encode the length of the array into the field. Instead it just shows up as a
size of 0. So change this to __array and set the len to FTRACE_STACK_ENTRIES
since this is what we actually do in practice and matches how user_stack_trace
works.
Link: http://lkml.kernel.org/r/1411589652-1318-1-git-send-email-jbacik@fb.com
Signed-off-by: Josef Bacik <jbacik@fb.com>
[ Pulled from the archeological digging of my INBOX ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | kernel/trace/trace_entries.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h index fc8e97328e54..78c146efb862 100644 --- a/kernel/trace/trace_entries.h +++ b/kernel/trace/trace_entries.h @@ -174,7 +174,7 @@ FTRACE_ENTRY(kernel_stack, stack_entry, F_STRUCT( __field( int, size ) - __dynamic_array(unsigned long, caller ) + __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) ), F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n" |