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| author | Masami Hiramatsu <mhiramat@redhat.com> | 2010-07-05 20:54:45 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-07-05 20:54:45 +0200 |
| commit | e09c8614b32915c16f68e039ac7040e602d73e35 (patch) | |
| tree | 725c768b1d2fbd569e447e7d4a2044dc0aa7a1d5 /Documentation | |
| parent | perf tools: Fix fallback to cplus_demangle() when bfd_demangle() is not avail... (diff) | |
| download | linux-e09c8614b32915c16f68e039ac7040e602d73e35.tar.xz linux-e09c8614b32915c16f68e039ac7040e602d73e35.zip | |
tracing/kprobes: Support "string" type
Support string type tracing and printing in kprobe-tracer.
This allows user to trace string data in kernel including __user data. Note
that sometimes __user data may not be accessed if it is paged-out (sorry, but
kprobes operation should be done in atomic, we can not wait for page-in).
Commiter note: Fixed up conflicts with b7e2ece.
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20100519195724.2885.18788.stgit@localhost6.localdomain6>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/trace/kprobetrace.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt index ec94748ae65b..5f77d94598dd 100644 --- a/Documentation/trace/kprobetrace.txt +++ b/Documentation/trace/kprobetrace.txt @@ -42,7 +42,7 @@ Synopsis of kprobe_events +|-offs(FETCHARG) : Fetch memory at FETCHARG +|- offs address.(**) NAME=FETCHARG : Set NAME as the argument name of FETCHARG. FETCHARG:TYPE : Set TYPE as the type of FETCHARG. Currently, basic types - (u8/u16/u32/u64/s8/s16/s32/s64) are supported. + (u8/u16/u32/u64/s8/s16/s32/s64) and string are supported. (*) only for return probe. (**) this is useful for fetching a field of data structures. |