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authorMasami Hiramatsu <mhiramat@redhat.com>2010-04-12 13:17:22 -0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-04-14 17:28:09 -0300
commit11a1ca3554b377d2a8a318a3cbf8ce10a7a2a8e4 (patch)
tree36483c56ee6b7148247ef6fbe349b09ee8cfcb25 /tools/perf/Documentation
parent4984912eb23113a4007940cd09c8351c0623ea5f (diff)
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.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 441324f2615..63c25d30488 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
-----------