Add para-callgraph.stp and para-callgraph.meta.

3 files changed, 37 insertions, 0 deletions

diff --git a/testsuite/systemtap.examples/ChangeLog b/testsuite/systemtap.examples/ChangeLog
index b1c34347..c4d2c355 100644
--- a/testsuite/systemtap.examples/ChangeLog
+++ b/testsuite/systemtap.examples/ChangeLog
@@ -1,3 +1,7 @@
+2008-07-02  William Cohen  <wcohen@redhat.com>
+
+	* para-callgraph.stp, para-callgraph.meta: New.
+
 2008-06-20  William Cohen  <wcohen@redhat.com>
 
 	* traceio2.meta: Correct test_check and test_installcheck commands.
diff --git a/testsuite/systemtap.examples/para-callgraph.meta b/testsuite/systemtap.examples/para-callgraph.meta
new file mode 100644
index 00000000..3ce4b648
--- /dev/null
+++ b/testsuite/systemtap.examples/para-callgraph.meta
@@ -0,0 +1,13 @@
+title: Tracing Calls for Sections of Code
+name: para-callgraph.stp
+version: 1.0
+author: anonymous
+keywords: trace callgraph
+subsystem: kernel
+status: production
+exit: user-controlled
+output: trace
+scope: system-wide
+description: The script takes two arguments: the first argument is the function to starts/stops the per thread call graph traces and the second argument is the list of functions to generate trace information on. The script prints out a timestap for the thread, the function name and pid, followed by entry or exit symboly and function name.
+test_check: stap -p4 para-callgraph.stp sys_read "*@fs/*.c"
+test_installcheck: stap  para-callgraph.stp sys_read "*@fs/*.c" -c "sleep 1"
diff --git a/testsuite/systemtap.examples/para-callgraph.stp b/testsuite/systemtap.examples/para-callgraph.stp
new file mode 100644
index 00000000..1afb8837
--- /dev/null
+++ b/testsuite/systemtap.examples/para-callgraph.stp
@@ -0,0 +1,20 @@
+function trace(entry_p) {
+   if(tid() in trace)
+       printf("%s%s%s\n",thread_indent(entry_p),
+		       	 (entry_p>0?"->":"<-"),
+		         probefunc())
+}
+
+global trace
+probe kernel.function(@1).call {
+   if (execname() == "stapio") next # skip our own helper process
+   trace[tid()] = 1
+   trace(1)
+}
+probe kernel.function(@1).return {
+   trace(-1)
+   delete trace[tid()]
+}
+
+probe kernel.function(@2).call { trace(1) }
+probe kernel.function(@2).return { trace(-1) }