diff options
| -rw-r--r-- | testsuite/systemtap.examples/ChangeLog | 4 | ||||
| -rw-r--r-- | testsuite/systemtap.examples/para-callgraph.meta | 13 | ||||
| -rw-r--r-- | testsuite/systemtap.examples/para-callgraph.stp | 20 |
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) } |