[ltt-dev] [PATCH 2/2] Update test-case for tracepoints and add a new test-case

[compudj@krystal.dyndns.org (Mathieu Desnoyers)]

* Nils Carlson (nils.carlson at ericsson.com) wrote:
> Update the test-case for probes to handle a new data pointer
> in the probe function. Also add a new test-case that stress-tests
> probe registration and unregistration.

Does it test reg. of multiple probes on a tracepoint ?

Mathieu

> ---
>  configure.ac                        |    1 +
>  tests/Makefile.am                   |    2 +-
>  tests/hello/hello.c                 |    2 +-
>  tests/hello/tp.c                    |   18 +++++--
>  tests/register_test/Makefile.am     |    5 ++
>  tests/register_test/register_test.c |   97 +++++++++++++++++++++++++++++++++++
>  tests/register_test/tp.h            |   22 ++++++++
>  7 files changed, 141 insertions(+), 6 deletions(-)
>  create mode 100644 tests/register_test/Makefile.am
>  create mode 100644 tests/register_test/register_test.c
>  create mode 100644 tests/register_test/tp.h
> 
> diff --git a/configure.ac b/configure.ac
> index dee974f..10a02e0 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -122,6 +122,7 @@ AC_CONFIG_FILES([
>  	tests/dlopen/Makefile
>  	tests/same_line_marker/Makefile
>  	tests/trace_event/Makefile
> +	tests/register_test/Makefile
>  	libustinstr-malloc/Makefile
>  	libustfork/Makefile
>  	libustd/Makefile
> diff --git a/tests/Makefile.am b/tests/Makefile.am
> index ab13cd7..1d31c3f 100644
> --- a/tests/Makefile.am
> +++ b/tests/Makefile.am
> @@ -1,3 +1,3 @@
> -SUBDIRS = hello hello2 basic basic_long fork simple_include snprintf test-nevents test-libustinstr-malloc dlopen same_line_marker trace_event
> +SUBDIRS = hello hello2 basic basic_long fork simple_include snprintf test-nevents test-libustinstr-malloc dlopen same_line_marker trace_event register_test
>  
>  dist_noinst_SCRIPTS = test_loop runtests trace_matches
> diff --git a/tests/hello/hello.c b/tests/hello/hello.c
> index 86c5c71..8147860 100644
> --- a/tests/hello/hello.c
> +++ b/tests/hello/hello.c
> @@ -26,8 +26,8 @@
>  
>  #include <ust/marker.h>
>  #include "usterr.h"
> -#include "tp.h"
>  #include "tracer.h"
> +#include "tp.h"
>  
>  void inthandler(int sig)
>  {
> diff --git a/tests/hello/tp.c b/tests/hello/tp.c
> index be10615..3a4c6fc 100644
> --- a/tests/hello/tp.c
> +++ b/tests/hello/tp.c
> @@ -19,16 +19,26 @@
>  #include <ust/marker.h>
>  #include "usterr.h"
>  
> +struct hello_trace_struct {
> +	char *message;
> +};
> +
> +struct hello_trace_struct hello_struct = {
> +	.message = "ehlo\n",
> +};
> +
>  DEFINE_TRACE(hello_tptest);
>  
> -void tptest_probe(int anint)
> +void tptest_probe(void *data, int anint)
>  {
> +	struct hello_trace_struct *hello;
> +	hello=(struct hello_trace_struct *)data;
>  	DBG("in tracepoint probe...");
> -	trace_mark(ust, tptest, "anint %d", anint);
> +	printf("this is the message: %s\n", hello->message);
>  }
>  
>  static void __attribute__((constructor)) init()
>  {
> -	DBG("connecting tracepoint...");
> -	register_trace_hello_tptest(tptest_probe);
> +	DBG("connecting tracepoint...\n");
> +	register_trace_hello_tptest(tptest_probe, &hello_struct);
>  }
> diff --git a/tests/register_test/Makefile.am b/tests/register_test/Makefile.am
> new file mode 100644
> index 0000000..ff25e08
> --- /dev/null
> +++ b/tests/register_test/Makefile.am
> @@ -0,0 +1,5 @@
> +AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/libust
> +
> +noinst_PROGRAMS = register_test
> +register_test_SOURCES = register_test.c tp.h
> +register_test_LDADD = $(top_builddir)/libust/libust.la $(top_builddir)/libust-initializer.o
> diff --git a/tests/register_test/register_test.c b/tests/register_test/register_test.c
> new file mode 100644
> index 0000000..8b65ffb
> --- /dev/null
> +++ b/tests/register_test/register_test.c
> @@ -0,0 +1,97 @@
> +/* Copyright (C) 2010 Nils Carlson
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
> + */
> +
> +#include <stdio.h>
> +#include <unistd.h>
> +#include <sys/mman.h>
> +#include <stdarg.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <sys/timerfd.h>
> +#include <fcntl.h>
> +#include <signal.h>
> +#include <pthread.h>
> +
> +#include <ust/marker.h>
> +#include "usterr.h"
> +#include "tracer.h"
> +#include "tp.h"
> +
> +DEFINE_TRACE(hello_tptest);
> +
> +
> +struct hello_trace_struct {
> +	char *message;
> +};
> +
> +struct hello_trace_struct hello_struct = {
> +	.message = "ehlo\n",
> +};
> +
> +void tptest_probe(void *data, int anint)
> +{
> +	struct hello_trace_struct *hello;
> +	char message[30];
> +	hello=(struct hello_trace_struct *)data;
> +	//printf("this is the message: %s\n", hello->message);
> +	snprintf(message, 30, "this is the %s\n", hello->message);
> +}
> +
> +
> +#define HELLO_LENGTH 100
> +
> +static void * register_thread_main(void *data)
> +{
> +	int ret, i, j = 0;
> +
> +	struct hello_trace_struct hello[HELLO_LENGTH];
> +
> +	for (i=0; i<HELLO_LENGTH; i++) {
> +		hello[i].message = malloc(6*sizeof(char));
> +		hello[i].message[0] = 'a'+i%25;
> +		memcpy(&hello[i].message[1], "ello", 5);
> +	}
> +
> +	for (i=0; i<1000; i++) {
> +		while (!register_trace_hello_tptest(tptest_probe,
> +						    &hello[j%HELLO_LENGTH])) {
> +			usleep(10);
> +			j++;
> +		}
> +		printf("Registered all\n");
> +		while (!unregister_trace_hello_tptest(tptest_probe,
> +						      &hello[j%HELLO_LENGTH])) {
> +			usleep(10);
> +			j++;
> +		}
> +		printf("Unregistered all\n");
> +	}
> +}
> +
> +
> +int main()
> +{
> +	pthread_t register_thread;
> +	int i;
> +
> +	pthread_create(&register_thread, NULL, register_thread_main, NULL);
> +	for(i=0; i<1000000; i++) {
> +		trace_hello_tptest(i);
> +	}
> +
> +	return 0;
> +}
> diff --git a/tests/register_test/tp.h b/tests/register_test/tp.h
> new file mode 100644
> index 0000000..f34f305
> --- /dev/null
> +++ b/tests/register_test/tp.h
> @@ -0,0 +1,22 @@
> +/* Copyright (C) 2009  Pierre-Marc Fournier
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
> + */
> +
> +#include <ust/tracepoint.h>
> +
> +DECLARE_TRACE(hello_tptest,
> +	      TP_PROTO(int anint),
> +	      TP_ARGS(anint));
> -- 
> 1.7.1
> 
> 
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com