#include <lttng/event.h>
#include <lttng/lttng-error.h>
+#include <lttng/kernel-probe.h>
#include <lttng/userspace-probe.h>
#include <lttng/userspace-probe-internal.h>
-
+#include <lttng/event-rule/event-rule.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/kprobe.h>
+#include <lttng/event-rule/kprobe-internal.h>
+#include <lttng/event-rule/syscall.h>
+#include <lttng/event-rule/syscall-internal.h>
+#include <lttng/event-rule/tracepoint.h>
+#include <lttng/event-rule/tracepoint-internal.h>
+#include <lttng/event-rule/uprobe-internal.h>
#include <common/common.h>
#include <common/defaults.h>
#include <common/trace-chunk.h>
struct ltt_kernel_event *trace_kernel_find_event(
char *name, struct ltt_kernel_channel *channel,
enum lttng_event_type type,
- struct lttng_filter_bytecode *filter)
+ struct lttng_bytecode *filter)
{
struct ltt_kernel_event *ev;
int found = 0;
*/
enum lttng_error_code trace_kernel_create_event(
struct lttng_event *ev, char *filter_expression,
- struct lttng_filter_bytecode *filter,
+ struct lttng_bytecode *filter,
struct ltt_kernel_event **kernel_event)
{
enum lttng_error_code ret;
return ret;
}
+/*
+ * Allocate and initialize a kernel token event rule.
+ *
+ * Return pointer to structure or NULL.
+ */
+enum lttng_error_code trace_kernel_create_token_event_rule(
+ struct lttng_trigger *trigger,
+ uint64_t token,
+ uint64_t trigger_error_counter_index,
+ struct ltt_kernel_token_event_rule **kernel_token_event_rule)
+{
+ enum lttng_error_code ret = LTTNG_OK;
+ struct ltt_kernel_token_event_rule *local_kernel_token_event_rule;
+ const struct lttng_condition *condition = NULL;
+ const struct lttng_event_rule *event_rule = NULL;
+
+ assert(kernel_token_event_rule);
+
+ condition = lttng_trigger_get_condition(trigger);
+ assert(condition);
+ assert(lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_EVENT_RULE_HIT);
+
+ assert(lttng_condition_event_rule_get_rule(condition, &event_rule) == LTTNG_CONDITION_STATUS_OK);
+ assert(event_rule);
+ assert(lttng_event_rule_get_type(event_rule) != LTTNG_EVENT_RULE_TYPE_UNKNOWN);
+
+ local_kernel_token_event_rule = zmalloc(sizeof(struct ltt_kernel_token_event_rule));
+ if (local_kernel_token_event_rule == NULL) {
+ PERROR("Failed to allocate ltt_kernel_token_event_rule structure");
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ local_kernel_token_event_rule->fd = -1;
+ local_kernel_token_event_rule->enabled = 1;
+ local_kernel_token_event_rule->token = token;
+ local_kernel_token_event_rule->error_counter_index = trigger_error_counter_index;
+
+ /* Get the reference of the event rule */
+ lttng_trigger_get(trigger);
+
+ local_kernel_token_event_rule->trigger = trigger;
+ /* The event rule still own the filter and bytecode */
+ local_kernel_token_event_rule->filter = lttng_event_rule_get_filter_bytecode(event_rule);
+
+ DBG3("[trace] Kernel token event rule %" PRIu64 " allocated", local_kernel_token_event_rule->token);
+error:
+ *kernel_token_event_rule = local_kernel_token_event_rule;
+ return ret;
+}
+
+/*
+ * Initialize a kernel trigger from an event rule.
+ */
+enum lttng_error_code trace_kernel_init_trigger_from_event_rule(const struct lttng_event_rule *rule,
+ struct lttng_kernel_trigger *kernel_trigger)
+{
+ enum lttng_error_code ret;
+ enum lttng_event_rule_status status;
+ const char *name = NULL;
+
+ /* TODO: do this for now but have disucssion on if this could be the
+ * responsability of the event_rule itself ala
+ * "lttng_even_rule_generate_kernel_trigger"
+ */
+ switch (lttng_event_rule_get_type(rule)) {
+ case LTTNG_EVENT_RULE_TYPE_KPROBE:
+ {
+ uint64_t address = 0, offset = 0;
+ const char *symbol_name = NULL;
+ const struct lttng_kernel_probe_location *location = NULL;
+ enum lttng_kernel_probe_location_status k_status;
+
+ status = lttng_event_rule_kprobe_get_location(rule, &location);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ switch (lttng_kernel_probe_location_get_type(location)) {
+ case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS:
+ {
+ k_status = lttng_kernel_probe_location_address_get_address(
+ location, &address);
+ if (k_status != LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK) {
+ ERR("Getting kernel probe address failed.");
+ }
+
+ break;
+ }
+ case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET:
+ {
+ k_status = lttng_kernel_probe_location_symbol_get_offset(
+ location, &offset);
+ if (k_status != LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK) {
+ ERR("Getting kernel probe symbol offset failed.");
+ }
+
+ symbol_name = lttng_kernel_probe_location_symbol_get_name(
+ location);
+ break;
+ }
+ default:
+ ERR("Unknown kernel probe location type (%d)",
+ lttng_kernel_probe_location_get_type(
+ location));
+ ret = LTTNG_ERR_INVALID;
+ goto error;
+ }
+
+ kernel_trigger->instrumentation = LTTNG_KERNEL_KPROBE;
+ kernel_trigger->u.kprobe.addr = address;
+ kernel_trigger->u.kprobe.offset = offset;
+ if (symbol_name) {
+ strncpy(kernel_trigger->u.kprobe.symbol_name,
+ symbol_name, LTTNG_KERNEL_SYM_NAME_LEN);
+ }
+ kernel_trigger->u.kprobe
+ .symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] =
+ '\0';
+ (void) lttng_event_rule_kprobe_get_name(rule, &name);
+ ret = LTTNG_OK;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_UPROBE:
+ {
+ const struct lttng_userspace_probe_location* location = NULL;
+ const struct lttng_userspace_probe_location_lookup_method *lookup = NULL;
+
+ status = lttng_event_rule_uprobe_get_location(rule, &location);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ kernel_trigger->instrumentation = LTTNG_KERNEL_UPROBE;
+
+ /*
+ * Only the elf lookup method is supported at the moment.
+ */
+ lookup = lttng_userspace_probe_location_get_lookup_method(
+ location);
+ if (!lookup) {
+ ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ /*
+ * From the kernel tracer's perspective, all userspace probe
+ * event types are all the same: a file and an offset.
+ */
+ switch (lttng_userspace_probe_location_lookup_method_get_type(lookup)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
+ /* Get the file descriptor on the target binary. */
+ kernel_trigger->u.uprobe.fd =
+ lttng_userspace_probe_location_function_get_binary_fd(location);
+
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ /* Get the file descriptor on the target binary. */
+ kernel_trigger->u.uprobe.fd =
+ lttng_userspace_probe_location_tracepoint_get_binary_fd(location);
+ break;
+ default:
+ DBG("Unsupported lookup method type");
+ ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ (void) lttng_event_rule_uprobe_get_name(rule, &name);
+
+ ret = LTTNG_OK;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_KRETPROBE:
+ assert("Not supported" && 0);
+ ret = LTTNG_OK;
+ break;
+ case LTTNG_EVENT_RULE_TYPE_TRACEPOINT:
+ /* TODO: assert his is a kernel domain event-rule */
+ kernel_trigger->instrumentation = LTTNG_KERNEL_TRACEPOINT;
+ (void) lttng_event_rule_tracepoint_get_pattern(rule, &name);
+ ret = LTTNG_OK;
+ break;
+ case LTTNG_EVENT_RULE_TYPE_SYSCALL:
+ kernel_trigger->instrumentation = LTTNG_KERNEL_SYSCALL;
+ (void) lttng_event_rule_syscall_get_pattern(rule, &name);
+ ret = LTTNG_OK;
+ break;
+ default:
+ ERR("Unknown kernel event rule instrumentation type (%d)", lttng_event_rule_get_type(rule));
+ ret = LTTNG_ERR_INVALID;
+ goto error;
+ }
+
+ /*
+ * WTF is LTTNG_EVENT_ALL??? and LTTNG_EVENT_FUNTION_ENTRY?????
+ */
+
+ /* Copy event name */
+ strncpy(kernel_trigger->name, name, LTTNG_KERNEL_SYM_NAME_LEN);
+ kernel_trigger->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
+
+error:
+ return ret;
+}
/*
* Allocate and initialize a kernel metadata.
*
free(event);
}
+/*
+ * Cleanup kernel event structure.
+ */
+void trace_kernel_destroy_token_event_rule(struct ltt_kernel_token_event_rule *event)
+{
+ /* TODO: review in depth to ensure adequate disposing */
+ assert(event);
+
+ if (event->fd >= 0) {
+ int ret;
+
+ DBG("[trace] Closing ,token event rule fd %d", event->fd);
+ /* Close kernel fd */
+ ret = close(event->fd);
+ if (ret) {
+ PERROR("close");
+ }
+ } else {
+ DBG("[trace] Tearing down token event rule (no associated fd)");
+ }
+
+ lttng_trigger_put(event->trigger);
+ free(event);
+}
/*
* Cleanup kernel context structure.
*/
projects / lttng-tools.git / blobdiff