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| author | Masami Hiramatsu | 2010-04-12 19:17:22 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2010-04-14 22:28:09 +0200 |
| commit | 11a1ca3554b377d2a8a318a3cbf8ce10a7a2a8e4 (patch) | |
| tree | 36483c56ee6b7148247ef6fbe349b09ee8cfcb25 /tools/perf/Documentation | |
| parent | perf probe: Query basic types from debuginfo (diff) | |
| download | kernel-qcow2-linux-11a1ca3554b377d2a8a318a3cbf8ce10a7a2a8e4.tar.gz kernel-qcow2-linux-11a1ca3554b377d2a8a318a3cbf8ce10a7a2a8e4.tar.xz kernel-qcow2-linux-11a1ca3554b377d2a8a318a3cbf8ce10a7a2a8e4.zip | |
perf probe: Support basic type casting
Add basic type casting for arguments to perf probe. This allows
users to specify the actual type of arguments. Of course, if
user sets invalid types, kprobe-tracer rejects that.
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: <20100412171722.3790.50372.stgit@localhost6.localdomain6>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-probe.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt index 441324f2615d..63c25d304880 100644 --- a/tools/perf/Documentation/perf-probe.txt +++ b/tools/perf/Documentation/perf-probe.txt @@ -85,9 +85,10 @@ PROBE ARGUMENT -------------- Each probe argument follows below syntax. - [NAME=]LOCALVAR|$retval|%REG|@SYMBOL + [NAME=]LOCALVAR|$retval|%REG|@SYMBOL[:TYPE] 'NAME' specifies the name of this argument (optional). You can use the name of local variable, local data structure member (e.g. var->field, var.field2), or kprobe-tracer argument format (e.g. $retval, %ax, etc). Note that the name of this argument will be set as the last member name if you specify a local data structure member (e.g. field2 for 'var->field1.field2'.) +'TYPE' casts the type of this argument (optional). If omitted, perf probe automatically set the type based on debuginfo. LINE SYNTAX ----------- |