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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-08-28 00:50:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-28 13:55:04 +0200 |
| commit | 0dd7b74787eaf7858c6c573353a83c3e2766e674 (patch) | |
| tree | 110fd833b620a60e34aa00aaf316f8fd80ee7f86 /kernel/trace/trace_export.c | |
| parent | 66c6e29f24a50173fc1e761c3e2483c8d64e3b1a (diff) | |
| download | kernel_samsung_smdk4412-0dd7b74787eaf7858c6c573353a83c3e2766e674.zip kernel_samsung_smdk4412-0dd7b74787eaf7858c6c573353a83c3e2766e674.tar.gz kernel_samsung_smdk4412-0dd7b74787eaf7858c6c573353a83c3e2766e674.tar.bz2 | |
tracing: Fix double CPP substitution in TRACE_EVENT_FN
TRACE_EVENT_FN relays on TRACE_EVENT by reprocessing its parameters
into the ftrace events CPP macro. This leads to a double substitution
in some cases.
For example, a bad consequence is a format always prefixed by
"%s, %s\n" for every TRACE_EVENT_FN based events.
Eg:
cat /debug/tracing/events/syscalls/sys_enter/format
[...]
print fmt: "%s, %s\n", "\"NR %ld (%lx, %lx, %lx, %lx, %lx, %lx)\"",\
"REC->id, REC->args[0], REC->args[1], REC->args[2], REC->args[3],\
REC->args[4], REC->args[5]"
This creates a failure in post-processing tools such as perf trace or
trace-cmd.
Then drop this double substitution and replace it by a new __cpparg()
macro that relays CPP arguments containing commas.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Josh Stone <jistone@redhat.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
LKML-Reference: <1251413406-6704-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_export.c')
0 files changed, 0 insertions, 0 deletions