* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <assert.h>
#include <stdio.h>
/* LTTng kernel tracer mandatory core modules list */
struct kern_modules_param kern_modules_control_core[] = {
- { "lttng-tracer" }, /* MUST be loaded first so keep at top */
- { "lttng-lib-ring-buffer" },
{ "lttng-ring-buffer-client-discard" },
{ "lttng-ring-buffer-client-overwrite" },
{ "lttng-ring-buffer-metadata-client" },
{ "lttng-ring-buffer-metadata-mmap-client" },
};
-/* LTTng kernel tracer optional base modules list */
-struct kern_modules_param kern_modules_control_opt[] = {
- { "lttng-types" },
- { "lttng-ftrace" },
- { "lttng-kprobes" },
- { "lttng-kretprobes" },
-};
-
/* LTTng kernel tracer probe modules list */
struct kern_modules_param kern_modules_probes_default[] = {
{ "lttng-probe-asoc" },
{ "lttng-probe-v4l2" },
{ "lttng-probe-workqueue" },
{ "lttng-probe-writeback" },
+ { "lttng-probe-x86-irq-vectors" },
+ { "lttng-probe-x86-exceptions" },
};
/* dynamic probe modules list */
static int nr_probes;
static int probes_capacity;
-static void modprobe_remove_lttng(const struct kern_modules_param *modules,
- int entries, int required)
-{
- int ret = 0, i;
- char modprobe[256];
-
- for (i = entries - 1; i >= 0; i--) {
- ret = snprintf(modprobe, sizeof(modprobe),
- "/sbin/modprobe -r -q %s",
- modules[i].name);
- if (ret < 0) {
- PERROR("snprintf modprobe -r");
- return;
- }
- modprobe[sizeof(modprobe) - 1] = '\0';
- ret = system(modprobe);
- if (ret == -1) {
- ERR("Unable to launch modprobe -r for module %s",
- modules[i].name);
- } else if (required && WEXITSTATUS(ret) != 0) {
- ERR("Unable to remove module %s",
- modules[i].name);
- } else {
- DBG("Modprobe removal successful %s",
- modules[i].name);
- }
- }
-}
-
-/*
- * Remove control kernel module(s) in reverse load order.
- */
-void modprobe_remove_lttng_control(void)
-{
- modprobe_remove_lttng(kern_modules_control_opt,
- ARRAY_SIZE(kern_modules_control_opt),
- LTTNG_MOD_OPTIONAL);
- modprobe_remove_lttng(kern_modules_control_core,
- ARRAY_SIZE(kern_modules_control_core),
- LTTNG_MOD_REQUIRED);
-}
-
-static void free_probes(void)
-{
- int i;
-
- if (!probes) {
- return;
- }
- for (i = 0; i < nr_probes; ++i) {
- free(probes[i].name);
- }
- free(probes);
- probes = NULL;
- nr_probes = 0;
-}
-
-/*
- * Remove data kernel modules in reverse load order.
- */
-void modprobe_remove_lttng_data(void)
-{
- if (!probes) {
- return;
- }
- modprobe_remove_lttng(probes, nr_probes, LTTNG_MOD_OPTIONAL);
- free_probes();
-}
-
-/*
- * Remove all kernel modules in reverse order.
- */
-void modprobe_remove_lttng_all(void)
-{
- modprobe_remove_lttng_data();
- modprobe_remove_lttng_control();
-}
-
#if HAVE_KMOD
#include <libkmod.h>
static void log_kmod(void *data, int priority, const char *file, int line,
#endif /* HAVE_KMOD */
+static void modprobe_remove_lttng(const struct kern_modules_param *modules,
+ int entries, int required)
+{
+ int ret = 0, i;
+ char modprobe[256];
+
+ for (i = entries - 1; i >= 0; i--) {
+ ret = snprintf(modprobe, sizeof(modprobe),
+ "/sbin/modprobe -r -q %s",
+ modules[i].name);
+ if (ret < 0) {
+ PERROR("snprintf modprobe -r");
+ return;
+ }
+ modprobe[sizeof(modprobe) - 1] = '\0';
+ ret = system(modprobe);
+ if (ret == -1) {
+ ERR("Unable to launch modprobe -r for module %s",
+ modules[i].name);
+ } else if (required && WEXITSTATUS(ret) != 0) {
+ ERR("Unable to remove module %s",
+ modules[i].name);
+ } else {
+ DBG("Modprobe removal successful %s",
+ modules[i].name);
+ }
+ }
+}
+
+/*
+ * Remove control kernel module(s) in reverse load order.
+ */
+void modprobe_remove_lttng_control(void)
+{
+ modprobe_remove_lttng(kern_modules_control_core,
+ ARRAY_SIZE(kern_modules_control_core),
+ LTTNG_MOD_REQUIRED);
+}
+
+static void free_probes(void)
+{
+ int i;
+
+ if (!probes) {
+ return;
+ }
+ for (i = 0; i < nr_probes; ++i) {
+ free(probes[i].name);
+ }
+ free(probes);
+ probes = NULL;
+ nr_probes = 0;
+}
+
+/*
+ * Remove data kernel modules in reverse load order.
+ */
+void modprobe_remove_lttng_data(void)
+{
+ if (!probes) {
+ return;
+ }
+ modprobe_remove_lttng(probes, nr_probes, LTTNG_MOD_OPTIONAL);
+ free_probes();
+}
+
+/*
+ * Remove all kernel modules in reverse order.
+ */
+void modprobe_remove_lttng_all(void)
+{
+ modprobe_remove_lttng_data();
+ modprobe_remove_lttng_control();
+}
+
/*
* Load control kernel module(s).
*/
ret = modprobe_lttng(kern_modules_control_core,
ARRAY_SIZE(kern_modules_control_core),
LTTNG_MOD_REQUIRED);
- if (ret != 0)
- return ret;
- ret = modprobe_lttng(kern_modules_control_opt,
- ARRAY_SIZE(kern_modules_control_opt),
- LTTNG_MOD_OPTIONAL);
return ret;
}
static int append_list_to_probes(const char *list)
{
char *next;
- int index = nr_probes, ret;
+ int ret;
char *tmp_list, *cur_list;
assert(list);
/* Length 13 is "lttng-probe-" + \0 */
name_len = strlen(next) + 13;
- cur_mod = &probes[index++];
+ cur_mod = &probes[nr_probes];
cur_mod->name = zmalloc(name_len);
if (!cur_mod->name) {
PERROR("malloc probe list");
goto error;
}
- cur_mod++;
nr_probes++;
}