From: Mathieu Desnoyers Date: Wed, 11 May 2016 14:10:17 +0000 (-0400) Subject: Test clock override plugin X-Git-Tag: v2.8.0~10 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=12359e4507a9d3e46e68c282d6780c060b360daf;p=lttng-modules.git Test clock override plugin Fixes: #939 Signed-off-by: Mathieu Desnoyers --- diff --git a/Makefile b/Makefile index c0b562a6..c2b12132 100644 --- a/Makefile +++ b/Makefile @@ -92,6 +92,7 @@ ifneq ($(KERNELRELEASE),) obj-$(CONFIG_LTTNG) += probes/ obj-$(CONFIG_LTTNG) += lib/ + obj-$(CONFIG_LTTNG) += tests/ else # KERNELRELEASE diff --git a/probes/Kbuild b/probes/Kbuild index 90e9805c..8ae9a6bb 100644 --- a/probes/Kbuild +++ b/probes/Kbuild @@ -261,6 +261,4 @@ ifneq ($(CONFIG_DYNAMIC_FTRACE),) obj-$(CONFIG_LTTNG) += lttng-ftrace.o endif # CONFIG_DYNAMIC_FTRACE -obj-$(CONFIG_LTTNG) += lttng-test.o - # vim:syntax=make diff --git a/probes/lttng-test.c b/probes/lttng-test.c deleted file mode 100644 index 54be4c7c..00000000 --- a/probes/lttng-test.c +++ /dev/null @@ -1,142 +0,0 @@ -/* - * lttng-test.c - * - * Linux Trace Toolkit Next Generation Test Module - * - * Copyright 2015 Mathieu Desnoyers - * - * 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; only - * version 2.1 of the License. - * - * 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 -#include -#include -#include - -#include -#include -#include -#include - -#define TP_MODULE_NOAUTOLOAD -#define LTTNG_PACKAGE_BUILD -#define CREATE_TRACE_POINTS -#define TRACE_INCLUDE_PATH instrumentation/events/lttng-module -#define TRACE_INCLUDE_FILE lttng-test -#define LTTNG_INSTRUMENTATION -#include - -DEFINE_TRACE(lttng_test_filter_event); - -#define LTTNG_TEST_FILTER_EVENT_FILE "lttng-test-filter-event" - -#define LTTNG_WRITE_COUNT_MAX 64 - -static struct proc_dir_entry *lttng_test_filter_event_dentry; - -static -void trace_test_event(unsigned int nr_iter) -{ - int i, netint; - long values[] = { 1, 2, 3 }; - char text[10] = "test"; - char escape[10] = "\\*"; - - for (i = 0; i < nr_iter; i++) { - netint = htonl(i); - trace_lttng_test_filter_event(i, netint, values, text, strlen(text), escape); - } -} - -/** - * lttng_filter_event_write - trigger a lttng_test_filter_event - * @file: file pointer - * @user_buf: user string - * @count: length to copy - * - * Return -1 on error, with EFAULT errno. Returns count on success. - */ -static -ssize_t lttng_test_filter_event_write(struct file *file, const char __user *user_buf, - size_t count, loff_t *ppos) -{ - unsigned int nr_iter; - ssize_t written; - int ret; - - /* Get the number of iterations */ - ret = lttng_kstrtouint_from_user(user_buf, count, 10, &nr_iter); - if (ret) { - written = ret; - goto end; - } - /* Trace the event */ - trace_test_event(nr_iter); - written = count; - *ppos += written; -end: - return written; -} - -static const struct file_operations lttng_test_filter_event_operations = { - .write = lttng_test_filter_event_write, -}; - -static -int __init lttng_test_init(void) -{ - int ret = 0; - - (void) wrapper_lttng_fixup_sig(THIS_MODULE); - wrapper_vmalloc_sync_all(); - lttng_test_filter_event_dentry = - proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE, - S_IRUGO | S_IWUGO, NULL, - <tng_test_filter_event_operations, NULL); - if (!lttng_test_filter_event_dentry) { - printk(KERN_ERR "Error creating LTTng test filter file\n"); - ret = -ENOMEM; - goto error; - } - ret = __lttng_events_init__lttng_test(); - if (ret) - goto error_events; - return ret; - -error_events: - remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL); -error: - return ret; -} - -module_init(lttng_test_init); - -static -void __exit lttng_test_exit(void) -{ - __lttng_events_exit__lttng_test(); - if (lttng_test_filter_event_dentry) - remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL); -} - -module_exit(lttng_test_exit); - -MODULE_LICENSE("GPL and additional rights"); -MODULE_AUTHOR("Mathieu Desnoyers "); -MODULE_DESCRIPTION("LTTng Test"); -MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "." - __stringify(LTTNG_MODULES_MINOR_VERSION) "." - __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION) - LTTNG_MODULES_EXTRAVERSION); diff --git a/tests/clock-plugin/lttng-clock-plugin-test.c b/tests/clock-plugin/lttng-clock-plugin-test.c new file mode 100644 index 00000000..f16ea645 --- /dev/null +++ b/tests/clock-plugin/lttng-clock-plugin-test.c @@ -0,0 +1,81 @@ +/* + * lttng-clock-plugin-test.c + * + * Copyright (C) 2014, 2016 Mathieu Desnoyers + * + * 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; only + * version 2.1 of the License. + * + * 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 +#include +#include +#include + +#include /* From lttng-modules */ + +static u64 trace_clock_read64_example(void) +{ + /* Freeze time. */ + return 0; +} + +static u64 trace_clock_freq_example(void) +{ + return 1000; /* 1KHz */ +} + +static int trace_clock_uuid_example(char *uuid) +{ + const char myuuid[] = "83c63deb-7aa4-48fb-abda-946f400d76e6"; + memcpy(uuid, myuuid, LTTNG_MODULES_UUID_STR_LEN); + return 0; +} + +static const char *trace_clock_name_example(void) +{ + return "lttng_test_clock_override"; +} + +static const char *trace_clock_description_example(void) +{ + return "Freeze time with 1KHz for regression test"; +} + +static +struct lttng_trace_clock ltc = { + .read64 = trace_clock_read64_example, + .freq = trace_clock_freq_example, + .uuid = trace_clock_uuid_example, + .name = trace_clock_name_example, + .description = trace_clock_description_example, +}; + +static __init +int lttng_clock_plugin_init(void) +{ + return lttng_clock_register_plugin(<c, THIS_MODULE); +} +module_init(lttng_clock_plugin_init); + +static __exit +void lttng_clock_plugin_exit(void) +{ + lttng_clock_unregister_plugin(<c, THIS_MODULE); +} +module_exit(lttng_clock_plugin_exit); + +MODULE_LICENSE("GPL and additional rights"); +MODULE_AUTHOR("Mathieu Desnoyers "); +MODULE_DESCRIPTION("LTTng Clock Plugin Example"); diff --git a/tests/probes/lttng-test.c b/tests/probes/lttng-test.c new file mode 100644 index 00000000..54be4c7c --- /dev/null +++ b/tests/probes/lttng-test.c @@ -0,0 +1,142 @@ +/* + * lttng-test.c + * + * Linux Trace Toolkit Next Generation Test Module + * + * Copyright 2015 Mathieu Desnoyers + * + * 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; only + * version 2.1 of the License. + * + * 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 +#include +#include +#include + +#include +#include +#include +#include + +#define TP_MODULE_NOAUTOLOAD +#define LTTNG_PACKAGE_BUILD +#define CREATE_TRACE_POINTS +#define TRACE_INCLUDE_PATH instrumentation/events/lttng-module +#define TRACE_INCLUDE_FILE lttng-test +#define LTTNG_INSTRUMENTATION +#include + +DEFINE_TRACE(lttng_test_filter_event); + +#define LTTNG_TEST_FILTER_EVENT_FILE "lttng-test-filter-event" + +#define LTTNG_WRITE_COUNT_MAX 64 + +static struct proc_dir_entry *lttng_test_filter_event_dentry; + +static +void trace_test_event(unsigned int nr_iter) +{ + int i, netint; + long values[] = { 1, 2, 3 }; + char text[10] = "test"; + char escape[10] = "\\*"; + + for (i = 0; i < nr_iter; i++) { + netint = htonl(i); + trace_lttng_test_filter_event(i, netint, values, text, strlen(text), escape); + } +} + +/** + * lttng_filter_event_write - trigger a lttng_test_filter_event + * @file: file pointer + * @user_buf: user string + * @count: length to copy + * + * Return -1 on error, with EFAULT errno. Returns count on success. + */ +static +ssize_t lttng_test_filter_event_write(struct file *file, const char __user *user_buf, + size_t count, loff_t *ppos) +{ + unsigned int nr_iter; + ssize_t written; + int ret; + + /* Get the number of iterations */ + ret = lttng_kstrtouint_from_user(user_buf, count, 10, &nr_iter); + if (ret) { + written = ret; + goto end; + } + /* Trace the event */ + trace_test_event(nr_iter); + written = count; + *ppos += written; +end: + return written; +} + +static const struct file_operations lttng_test_filter_event_operations = { + .write = lttng_test_filter_event_write, +}; + +static +int __init lttng_test_init(void) +{ + int ret = 0; + + (void) wrapper_lttng_fixup_sig(THIS_MODULE); + wrapper_vmalloc_sync_all(); + lttng_test_filter_event_dentry = + proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE, + S_IRUGO | S_IWUGO, NULL, + <tng_test_filter_event_operations, NULL); + if (!lttng_test_filter_event_dentry) { + printk(KERN_ERR "Error creating LTTng test filter file\n"); + ret = -ENOMEM; + goto error; + } + ret = __lttng_events_init__lttng_test(); + if (ret) + goto error_events; + return ret; + +error_events: + remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL); +error: + return ret; +} + +module_init(lttng_test_init); + +static +void __exit lttng_test_exit(void) +{ + __lttng_events_exit__lttng_test(); + if (lttng_test_filter_event_dentry) + remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL); +} + +module_exit(lttng_test_exit); + +MODULE_LICENSE("GPL and additional rights"); +MODULE_AUTHOR("Mathieu Desnoyers "); +MODULE_DESCRIPTION("LTTng Test"); +MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "." + __stringify(LTTNG_MODULES_MINOR_VERSION) "." + __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION) + LTTNG_MODULES_EXTRAVERSION);