strace example: add a note re. PR6762

The reminder was motivated by coming across Jan Kratoch's much more
elaborate strace-in-systemtap prototype, which solves this problem:
http://git.jankratochvil.net/?p=staptrace.git

diff --git a/testsuite/systemtap.examples/process/strace.stp b/testsuite/systemtap.examples/process/strace.stp
index cbd4ddc7c19411da9c2ed1d9e394417a8a3052dc..91bc403eaa18fa302c4114f78c3b936339c6c76a 100755 (executable)
--- a/testsuite/systemtap.examples/process/strace.stp
+++ b/testsuite/systemtap.examples/process/strace.stp
@@ -32,6 +32,9 @@ function filter_p()
 
 probe nd_syscall.* 
   {
+    # TODO: filter out apparently-nested syscalls (that are implemented
+    # in terms of each other within the kernel); PR6762
+
     if (filter_p()) next;
 
     t=tid()