lttngeventruleinclude_HEADERS= \
lttng/event-rule/event-rule.h \
- lttng/event-rule/kprobe.h \
+ lttng/event-rule/kernel-probe.h \
lttng/event-rule/syscall.h \
lttng/event-rule/uprobe.h \
lttng/event-rule/tracepoint.h
lttng/session-descriptor-internal.h \
lttng/kernel-probe-internal.h \
lttng/event-rule/event-rule-internal.h \
- lttng/event-rule/kprobe-internal.h \
+ lttng/event-rule/kernel-probe-internal.h \
lttng/event-rule/syscall-internal.h \
lttng/event-rule/uprobe-internal.h \
lttng/event-rule/tracepoint-internal.h \
--- /dev/null
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_EVENT_RULE_KERNEL_PROBE_INTERNAL_H
+#define LTTNG_EVENT_RULE_KERNEL_PROBE_INTERNAL_H
+
+#include <common/payload-view.h>
+#include <common/macros.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/kernel-probe.h>
+
+struct lttng_event_rule_kernel_probe {
+ struct lttng_event_rule parent;
+ char *name;
+ struct lttng_kernel_probe_location *location;
+};
+
+struct lttng_event_rule_kernel_probe_comm {
+ /* Includes terminator `\0`. */
+ uint32_t name_len;
+ uint32_t location_len;
+ /*
+ * Payload is composed of, in that order:
+ * - name (null terminated),
+ * - kernel probe location object.
+ */
+ char payload[];
+} LTTNG_PACKED;
+
+LTTNG_HIDDEN
+ssize_t lttng_event_rule_kernel_probe_create_from_payload(
+ struct lttng_payload_view *payload,
+ struct lttng_event_rule **rule);
+
+#endif /* LTTNG_EVENT_RULE_KERNEL_PROBE_INTERNAL_H */
--- /dev/null
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_EVENT_RULE_KERNEL_PROBE_H
+#define LTTNG_EVENT_RULE_KERNEL_PROBE_H
+
+#include <lttng/event-rule/event-rule.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct lttng_kernel_probe_location;
+
+/*
+ * Create a newly allocated kernel probe event rule.
+ *
+ * Returns a new event rule on success, NULL on failure. The returned event rule
+ * must be destroyed using lttng_event_rule_destroy().
+ */
+extern struct lttng_event_rule *lttng_event_rule_kernel_probe_create(void);
+
+/*
+ * Set the kernel probe location of a kernel probe event rule.
+ *
+ * The location is copied internally.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_kernel_probe_set_location(
+ struct lttng_event_rule *rule,
+ const struct lttng_kernel_probe_location *location);
+
+/*
+ * Get the kernel probe location of a kernel probe event rule.
+ *
+ * The caller does not assume the ownership of the returned location.
+ * The location shall only be used for the duration of the event
+ * rule's lifetime, or before a different location is set.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's location
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a location was not set prior to
+ * this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_kernel_probe_get_location(
+ const struct lttng_event_rule *rule,
+ const struct lttng_kernel_probe_location **location);
+
+/*
+ * Set the name of a kernel probe event rule.
+ *
+ * The name is copied internally.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_kernel_probe_set_name(
+ struct lttng_event_rule *rule, const char *name);
+
+/*
+ * Get the name of a kernel probe event rule.
+ *
+ * The caller does not assume the ownership of the returned name.
+ * The name shall only only be used for the duration of the event
+ * rule's lifetime, or before a different name is set.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's name on
+ * success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is passed,
+ * or LTTNG_EVENT_RULE_STATUS_UNSET if a name was not set prior to this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_kernel_probe_get_name(
+ const struct lttng_event_rule *rule, const char **name);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LTTNG_EVENT_RULE_KERNEL_PROBE_H */
+++ /dev/null
-/*
- * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#ifndef LTTNG_EVENT_RULE_KERNEL_PROBE_INTERNAL_H
-#define LTTNG_EVENT_RULE_KERNEL_PROBE_INTERNAL_H
-
-#include <common/payload-view.h>
-#include <common/macros.h>
-#include <lttng/event-rule/event-rule-internal.h>
-#include <lttng/event-rule/kprobe.h>
-
-struct lttng_event_rule_kernel_probe {
- struct lttng_event_rule parent;
- char *name;
- struct lttng_kernel_probe_location *location;
-};
-
-struct lttng_event_rule_kernel_probe_comm {
- /* Includes terminator `\0`. */
- uint32_t name_len;
- uint32_t location_len;
- /*
- * Payload is composed of, in that order:
- * - name (null terminated),
- * - kernel probe location object.
- */
- char payload[];
-} LTTNG_PACKED;
-
-LTTNG_HIDDEN
-ssize_t lttng_event_rule_kernel_probe_create_from_payload(
- struct lttng_payload_view *payload,
- struct lttng_event_rule **rule);
-
-#endif /* LTTNG_EVENT_RULE_KERNEL_PROBE_INTERNAL_H */
+++ /dev/null
-/*
- * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#ifndef LTTNG_EVENT_RULE_KERNEL_PROBE_H
-#define LTTNG_EVENT_RULE_KERNEL_PROBE_H
-
-#include <lttng/event-rule/event-rule.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct lttng_kernel_probe_location;
-
-/*
- * Create a newly allocated kernel probe event rule.
- *
- * Returns a new event rule on success, NULL on failure. The returned event rule
- * must be destroyed using lttng_event_rule_destroy().
- */
-extern struct lttng_event_rule *lttng_event_rule_kernel_probe_create(void);
-
-/*
- * Set the kernel probe location of a kernel probe event rule.
- *
- * The location is copied internally.
- *
- * Returns LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
- * if invalid parameters are passed.
- */
-extern enum lttng_event_rule_status lttng_event_rule_kernel_probe_set_location(
- struct lttng_event_rule *rule,
- const struct lttng_kernel_probe_location *location);
-
-/*
- * Get the kernel probe location of a kernel probe event rule.
- *
- * The caller does not assume the ownership of the returned location.
- * The location shall only be used for the duration of the event
- * rule's lifetime, or before a different location is set.
- *
- * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's location
- * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
- * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a location was not set prior to
- * this call.
- */
-extern enum lttng_event_rule_status lttng_event_rule_kernel_probe_get_location(
- const struct lttng_event_rule *rule,
- const struct lttng_kernel_probe_location **location);
-
-/*
- * Set the name of a kernel probe event rule.
- *
- * The name is copied internally.
- *
- * Returns LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
- * if invalid parameters are passed.
- */
-extern enum lttng_event_rule_status lttng_event_rule_kernel_probe_set_name(
- struct lttng_event_rule *rule, const char *name);
-
-/*
- * Get the name of a kernel probe event rule.
- *
- * The caller does not assume the ownership of the returned name.
- * The name shall only only be used for the duration of the event
- * rule's lifetime, or before a different name is set.
- *
- * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's name on
- * success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is passed,
- * or LTTNG_EVENT_RULE_STATUS_UNSET if a name was not set prior to this call.
- */
-extern enum lttng_event_rule_status lttng_event_rule_kernel_probe_get_name(
- const struct lttng_event_rule *rule, const char **name);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* LTTNG_EVENT_RULE_KERNEL_PROBE_H */
#include <lttng/event-expr.h>
#include <lttng/event-field-value.h>
#include <lttng/event-rule/event-rule.h>
-#include <lttng/event-rule/kprobe.h>
+#include <lttng/event-rule/kernel-probe.h>
#include <lttng/event-rule/syscall.h>
#include <lttng/event-rule/tracepoint.h>
#include <lttng/event-rule/uprobe.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/kernel-probe.h>
+#include <lttng/event-rule/kernel-probe-internal.h>
#include <lttng/event-rule/syscall.h>
#include <lttng/event-rule/syscall-internal.h>
#include <lttng/event-rule/tracepoint.h>
event-expr-to-bytecode.c event-expr-to-bytecode.h \
event-field-value.c \
event-rule/event-rule.c \
- event-rule/kprobe.c \
+ event-rule/kernel-probe.c \
event-rule/syscall.c \
event-rule/uprobe.c \
event-rule/tracepoint.c \
#include <common/hashtable/hashtable.h>
#include <common/hashtable/utils.h>
#include <lttng/event-rule/event-rule-internal.h>
-#include <lttng/event-rule/kprobe-internal.h>
+#include <lttng/event-rule/kernel-probe-internal.h>
#include <lttng/event-rule/syscall-internal.h>
#include <lttng/event-rule/tracepoint-internal.h>
#include <lttng/event-rule/uprobe-internal.h>
--- /dev/null
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <assert.h>
+#include <common/credentials.h>
+#include <common/error.h>
+#include <common/macros.h>
+#include <common/payload.h>
+#include <common/payload-view.h>
+#include <common/runas.h>
+#include <common/hashtable/hashtable.h>
+#include <common/hashtable/utils.h>
+#include <ctype.h>
+#include <lttng/constant.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/kernel-probe-internal.h>
+#include <lttng/kernel-probe.h>
+#include <lttng/kernel-probe-internal.h>
+#include <stdio.h>
+
+#define IS_KPROBE_EVENT_RULE(rule) \
+ (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE)
+
+#if (LTTNG_SYMBOL_NAME_LEN == 256)
+#define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
+#endif
+
+static void lttng_event_rule_kernel_probe_destroy(struct lttng_event_rule *rule)
+{
+ struct lttng_event_rule_kernel_probe *kprobe;
+
+ kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
+
+ lttng_kernel_probe_location_destroy(kprobe->location);
+ free(kprobe->name);
+ free(kprobe);
+}
+
+static bool lttng_event_rule_kernel_probe_validate(
+ const struct lttng_event_rule *rule)
+{
+ bool valid = false;
+ struct lttng_event_rule_kernel_probe *kprobe;
+
+ if (!rule) {
+ goto end;
+ }
+
+ kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
+
+ /* Required field. */
+ if (!kprobe->name) {
+ ERR("Invalid name event rule: a name must be set.");
+ goto end;
+ }
+
+ /* Required field. */
+ if(!kprobe->location) {
+ ERR("Invalid name event rule: a location must be set.");
+ goto end;
+ }
+
+ valid = true;
+end:
+ return valid;
+}
+
+static int lttng_event_rule_kernel_probe_serialize(
+ const struct lttng_event_rule *rule,
+ struct lttng_payload *payload)
+{
+ int ret;
+ size_t name_len, header_offset, size_before_location;
+ struct lttng_event_rule_kernel_probe *kprobe;
+ struct lttng_event_rule_kernel_probe_comm kprobe_comm;
+ struct lttng_event_rule_kernel_probe_comm *header;
+
+ if (!rule || !IS_KPROBE_EVENT_RULE(rule)) {
+ ret = -1;
+ goto end;
+ }
+
+ header_offset = payload->buffer.size;
+
+ DBG("Serializing kprobe event rule.");
+ kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
+
+ name_len = strlen(kprobe->name) + 1;
+ kprobe_comm.name_len = name_len;
+
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &kprobe_comm, sizeof(kprobe_comm));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, kprobe->name, name_len);
+ if (ret) {
+ goto end;
+ }
+
+ size_before_location = payload->buffer.size;
+
+ ret = lttng_kernel_probe_location_serialize(kprobe->location, payload);
+ if (ret < 0) {
+ goto end;
+ }
+
+ /* Update the header regarding the probe size. */
+ header = (struct lttng_event_rule_kernel_probe_comm*) (
+ (char *) payload->buffer.data + header_offset);
+ header->location_len = payload->buffer.size - size_before_location;
+
+ ret = 0;
+
+end:
+ return ret;
+}
+
+static bool lttng_event_rule_kernel_probe_is_equal(const struct lttng_event_rule *_a,
+ const struct lttng_event_rule *_b)
+{
+ bool is_equal = false;
+ struct lttng_event_rule_kernel_probe *a, *b;
+
+ a = container_of(_a, struct lttng_event_rule_kernel_probe, parent);
+ b = container_of(_b, struct lttng_event_rule_kernel_probe, parent);
+
+ /* Quick checks */
+ if (!!a->name != !!b->name) {
+ goto end;
+ }
+
+ /* Long check */
+ assert(a->name);
+ assert(b->name);
+ if (strcmp(a->name, b->name)) {
+ goto end;
+ }
+
+ is_equal = lttng_kernel_probe_location_is_equal(
+ a->location, b->location);
+end:
+ return is_equal;
+}
+
+static enum lttng_error_code lttng_event_rule_kernel_probe_generate_filter_bytecode(
+ struct lttng_event_rule *rule,
+ const struct lttng_credentials *creds)
+{
+ /* Nothing to do. */
+ return LTTNG_OK;
+}
+
+static const char *lttng_event_rule_kernel_probe_get_filter(
+ const struct lttng_event_rule *rule)
+{
+ /* Not supported. */
+ return NULL;
+}
+
+static const struct lttng_bytecode *
+lttng_event_rule_kernel_probe_get_filter_bytecode(const struct lttng_event_rule *rule)
+{
+ /* Not supported. */
+ return NULL;
+}
+
+static enum lttng_event_rule_generate_exclusions_status
+lttng_event_rule_kernel_probe_generate_exclusions(const struct lttng_event_rule *rule,
+ struct lttng_event_exclusion **exclusions)
+{
+ /* Not supported. */
+ *exclusions = NULL;
+ return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE;
+}
+
+static unsigned long
+lttng_event_rule_kernel_probe_hash(
+ const struct lttng_event_rule *rule)
+{
+ unsigned long hash;
+ struct lttng_event_rule_kernel_probe *krule =
+ container_of(rule, typeof(*krule), parent);
+
+ hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE,
+ lttng_ht_seed);
+ hash ^= hash_key_str(krule->name, lttng_ht_seed);
+ hash ^= lttng_kernel_probe_location_hash(krule->location);
+
+ return hash;
+}
+
+struct lttng_event_rule *lttng_event_rule_kernel_probe_create(void)
+{
+ struct lttng_event_rule *rule = NULL;
+ struct lttng_event_rule_kernel_probe *krule;
+
+ krule = zmalloc(sizeof(struct lttng_event_rule_kernel_probe));
+ if (!krule) {
+ goto end;
+ }
+
+ rule = &krule->parent;
+ lttng_event_rule_init(&krule->parent, LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE);
+ krule->parent.validate = lttng_event_rule_kernel_probe_validate;
+ krule->parent.serialize = lttng_event_rule_kernel_probe_serialize;
+ krule->parent.equal = lttng_event_rule_kernel_probe_is_equal;
+ krule->parent.destroy = lttng_event_rule_kernel_probe_destroy;
+ krule->parent.generate_filter_bytecode =
+ lttng_event_rule_kernel_probe_generate_filter_bytecode;
+ krule->parent.get_filter = lttng_event_rule_kernel_probe_get_filter;
+ krule->parent.get_filter_bytecode =
+ lttng_event_rule_kernel_probe_get_filter_bytecode;
+ krule->parent.generate_exclusions =
+ lttng_event_rule_kernel_probe_generate_exclusions;
+ krule->parent.hash = lttng_event_rule_kernel_probe_hash;
+end:
+ return rule;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_event_rule_kernel_probe_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_event_rule **_event_rule)
+{
+ ssize_t ret, offset = 0;
+ enum lttng_event_rule_status status;
+ const struct lttng_event_rule_kernel_probe_comm *kprobe_comm;
+ const char *name;
+ struct lttng_buffer_view current_buffer_view;
+ struct lttng_event_rule *rule = NULL;
+ struct lttng_event_rule_kernel_probe *kprobe = NULL;
+ struct lttng_kernel_probe_location *location;
+
+ if (!_event_rule) {
+ ret = -1;
+ goto end;
+ }
+
+ current_buffer_view = lttng_buffer_view_from_view(
+ &view->buffer, offset, sizeof(*kprobe_comm));
+ if (!lttng_buffer_view_is_valid(¤t_buffer_view)) {
+ ERR("Failed to initialize from malformed event rule kprobe: buffer too short to contain header.");
+ ret = -1;
+ goto end;
+ }
+
+ kprobe_comm = (typeof(kprobe_comm)) current_buffer_view.data;
+
+ rule = lttng_event_rule_kernel_probe_create();
+ if (!rule) {
+ ERR("Failed to create event rule kprobe.");
+ ret = -1;
+ goto end;
+ }
+
+ kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
+
+ /* Skip to payload */
+ offset += current_buffer_view.size;
+
+ {
+ /* Map the name. */
+ struct lttng_payload_view current_payload_view =
+ lttng_payload_view_from_view(view, offset,
+ kprobe_comm->name_len);
+
+ if (!lttng_payload_view_is_valid(¤t_payload_view)) {
+ ret = -1;
+ goto end;
+ }
+
+ name = current_payload_view.buffer.data;
+ if (!lttng_buffer_view_contains_string(
+ ¤t_payload_view.buffer, name,
+ kprobe_comm->name_len)) {
+ ret = -1;
+ goto end;
+ }
+ }
+
+ /* Skip after the name. */
+ offset += kprobe_comm->name_len;
+
+ /* Map the kernel probe location. */
+ {
+ struct lttng_payload_view current_payload_view =
+ lttng_payload_view_from_view(view, offset,
+ kprobe_comm->location_len);
+
+ if (!lttng_payload_view_is_valid(¤t_payload_view)) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = lttng_kernel_probe_location_create_from_payload(
+ ¤t_payload_view, &location);
+ if (ret < 0) {
+ ret = -1;
+ goto end;
+ }
+ }
+
+ if (ret != kprobe_comm->location_len) {
+ ret = -1;
+ goto end;
+ }
+
+ kprobe->location = location;
+
+ /* Skip after the location */
+ offset += kprobe_comm->location_len;
+
+ status = lttng_event_rule_kernel_probe_set_name(rule, name);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set event rule kprobe name.");
+ ret = -1;
+ goto end;
+ }
+
+ *_event_rule = rule;
+ rule = NULL;
+ ret = offset;
+end:
+ lttng_event_rule_destroy(rule);
+ return ret;
+}
+
+enum lttng_event_rule_status lttng_event_rule_kernel_probe_set_location(
+ struct lttng_event_rule *rule,
+ const struct lttng_kernel_probe_location *location)
+{
+ struct lttng_kernel_probe_location *location_copy = NULL;
+ struct lttng_event_rule_kernel_probe *kprobe;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_KPROBE_EVENT_RULE(rule) || !location) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
+ location_copy = lttng_kernel_probe_location_copy(location);
+ if (!location_copy) {
+ status = LTTNG_EVENT_RULE_STATUS_ERROR;
+ goto end;
+ }
+
+ if (kprobe->location) {
+ lttng_kernel_probe_location_destroy(kprobe->location);
+ }
+
+ kprobe->location = location_copy;
+ location_copy = NULL;
+end:
+ lttng_kernel_probe_location_destroy(location_copy);
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_kernel_probe_get_location(
+ const struct lttng_event_rule *rule,
+ const struct lttng_kernel_probe_location **location)
+{
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+ struct lttng_event_rule_kernel_probe *kprobe;
+
+ if (!rule || !IS_KPROBE_EVENT_RULE(rule) || !location) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
+ *location = kprobe->location;
+
+ if (!*location) {
+ status = LTTNG_EVENT_RULE_STATUS_UNSET;
+ goto end;
+ }
+
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_kernel_probe_set_name(
+ struct lttng_event_rule *rule, const char *name)
+{
+ char *name_copy = NULL;
+ struct lttng_event_rule_kernel_probe *kprobe;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_KPROBE_EVENT_RULE(rule) || !name ||
+ strlen(name) == 0) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
+ name_copy = strdup(name);
+ if (!name_copy) {
+ status = LTTNG_EVENT_RULE_STATUS_ERROR;
+ goto end;
+ }
+
+ free(kprobe->name);
+
+ kprobe->name = name_copy;
+ name_copy = NULL;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_kernel_probe_get_name(
+ const struct lttng_event_rule *rule, const char **name)
+{
+ struct lttng_event_rule_kernel_probe *kprobe;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_KPROBE_EVENT_RULE(rule) || !name) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
+ if (!kprobe->name) {
+ status = LTTNG_EVENT_RULE_STATUS_UNSET;
+ goto end;
+ }
+
+ *name = kprobe->name;
+end:
+ return status;
+}
+++ /dev/null
-/*
- * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#include <assert.h>
-#include <common/credentials.h>
-#include <common/error.h>
-#include <common/macros.h>
-#include <common/payload.h>
-#include <common/payload-view.h>
-#include <common/runas.h>
-#include <common/hashtable/hashtable.h>
-#include <common/hashtable/utils.h>
-#include <ctype.h>
-#include <lttng/constant.h>
-#include <lttng/event-rule/event-rule-internal.h>
-#include <lttng/event-rule/kprobe-internal.h>
-#include <lttng/kernel-probe.h>
-#include <lttng/kernel-probe-internal.h>
-#include <stdio.h>
-
-#define IS_KPROBE_EVENT_RULE(rule) \
- (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE)
-
-#if (LTTNG_SYMBOL_NAME_LEN == 256)
-#define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
-#endif
-
-static void lttng_event_rule_kernel_probe_destroy(struct lttng_event_rule *rule)
-{
- struct lttng_event_rule_kernel_probe *kprobe;
-
- kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
-
- lttng_kernel_probe_location_destroy(kprobe->location);
- free(kprobe->name);
- free(kprobe);
-}
-
-static bool lttng_event_rule_kernel_probe_validate(
- const struct lttng_event_rule *rule)
-{
- bool valid = false;
- struct lttng_event_rule_kernel_probe *kprobe;
-
- if (!rule) {
- goto end;
- }
-
- kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
-
- /* Required field. */
- if (!kprobe->name) {
- ERR("Invalid name event rule: a name must be set.");
- goto end;
- }
-
- /* Required field. */
- if(!kprobe->location) {
- ERR("Invalid name event rule: a location must be set.");
- goto end;
- }
-
- valid = true;
-end:
- return valid;
-}
-
-static int lttng_event_rule_kernel_probe_serialize(
- const struct lttng_event_rule *rule,
- struct lttng_payload *payload)
-{
- int ret;
- size_t name_len, header_offset, size_before_location;
- struct lttng_event_rule_kernel_probe *kprobe;
- struct lttng_event_rule_kernel_probe_comm kprobe_comm;
- struct lttng_event_rule_kernel_probe_comm *header;
-
- if (!rule || !IS_KPROBE_EVENT_RULE(rule)) {
- ret = -1;
- goto end;
- }
-
- header_offset = payload->buffer.size;
-
- DBG("Serializing kprobe event rule.");
- kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
-
- name_len = strlen(kprobe->name) + 1;
- kprobe_comm.name_len = name_len;
-
- ret = lttng_dynamic_buffer_append(
- &payload->buffer, &kprobe_comm, sizeof(kprobe_comm));
- if (ret) {
- goto end;
- }
-
- ret = lttng_dynamic_buffer_append(&payload->buffer, kprobe->name, name_len);
- if (ret) {
- goto end;
- }
-
- size_before_location = payload->buffer.size;
-
- ret = lttng_kernel_probe_location_serialize(kprobe->location, payload);
- if (ret < 0) {
- goto end;
- }
-
- /* Update the header regarding the probe size. */
- header = (struct lttng_event_rule_kernel_probe_comm*) (
- (char *) payload->buffer.data + header_offset);
- header->location_len = payload->buffer.size - size_before_location;
-
- ret = 0;
-
-end:
- return ret;
-}
-
-static bool lttng_event_rule_kernel_probe_is_equal(const struct lttng_event_rule *_a,
- const struct lttng_event_rule *_b)
-{
- bool is_equal = false;
- struct lttng_event_rule_kernel_probe *a, *b;
-
- a = container_of(_a, struct lttng_event_rule_kernel_probe, parent);
- b = container_of(_b, struct lttng_event_rule_kernel_probe, parent);
-
- /* Quick checks */
- if (!!a->name != !!b->name) {
- goto end;
- }
-
- /* Long check */
- assert(a->name);
- assert(b->name);
- if (strcmp(a->name, b->name)) {
- goto end;
- }
-
- is_equal = lttng_kernel_probe_location_is_equal(
- a->location, b->location);
-end:
- return is_equal;
-}
-
-static enum lttng_error_code lttng_event_rule_kernel_probe_generate_filter_bytecode(
- struct lttng_event_rule *rule,
- const struct lttng_credentials *creds)
-{
- /* Nothing to do. */
- return LTTNG_OK;
-}
-
-static const char *lttng_event_rule_kernel_probe_get_filter(
- const struct lttng_event_rule *rule)
-{
- /* Not supported. */
- return NULL;
-}
-
-static const struct lttng_bytecode *
-lttng_event_rule_kernel_probe_get_filter_bytecode(const struct lttng_event_rule *rule)
-{
- /* Not supported. */
- return NULL;
-}
-
-static enum lttng_event_rule_generate_exclusions_status
-lttng_event_rule_kernel_probe_generate_exclusions(const struct lttng_event_rule *rule,
- struct lttng_event_exclusion **exclusions)
-{
- /* Not supported. */
- *exclusions = NULL;
- return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE;
-}
-
-static unsigned long
-lttng_event_rule_kernel_probe_hash(
- const struct lttng_event_rule *rule)
-{
- unsigned long hash;
- struct lttng_event_rule_kernel_probe *krule =
- container_of(rule, typeof(*krule), parent);
-
- hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE,
- lttng_ht_seed);
- hash ^= hash_key_str(krule->name, lttng_ht_seed);
- hash ^= lttng_kernel_probe_location_hash(krule->location);
-
- return hash;
-}
-
-struct lttng_event_rule *lttng_event_rule_kernel_probe_create(void)
-{
- struct lttng_event_rule *rule = NULL;
- struct lttng_event_rule_kernel_probe *krule;
-
- krule = zmalloc(sizeof(struct lttng_event_rule_kernel_probe));
- if (!krule) {
- goto end;
- }
-
- rule = &krule->parent;
- lttng_event_rule_init(&krule->parent, LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE);
- krule->parent.validate = lttng_event_rule_kernel_probe_validate;
- krule->parent.serialize = lttng_event_rule_kernel_probe_serialize;
- krule->parent.equal = lttng_event_rule_kernel_probe_is_equal;
- krule->parent.destroy = lttng_event_rule_kernel_probe_destroy;
- krule->parent.generate_filter_bytecode =
- lttng_event_rule_kernel_probe_generate_filter_bytecode;
- krule->parent.get_filter = lttng_event_rule_kernel_probe_get_filter;
- krule->parent.get_filter_bytecode =
- lttng_event_rule_kernel_probe_get_filter_bytecode;
- krule->parent.generate_exclusions =
- lttng_event_rule_kernel_probe_generate_exclusions;
- krule->parent.hash = lttng_event_rule_kernel_probe_hash;
-end:
- return rule;
-}
-
-LTTNG_HIDDEN
-ssize_t lttng_event_rule_kernel_probe_create_from_payload(
- struct lttng_payload_view *view,
- struct lttng_event_rule **_event_rule)
-{
- ssize_t ret, offset = 0;
- enum lttng_event_rule_status status;
- const struct lttng_event_rule_kernel_probe_comm *kprobe_comm;
- const char *name;
- struct lttng_buffer_view current_buffer_view;
- struct lttng_event_rule *rule = NULL;
- struct lttng_event_rule_kernel_probe *kprobe = NULL;
- struct lttng_kernel_probe_location *location;
-
- if (!_event_rule) {
- ret = -1;
- goto end;
- }
-
- current_buffer_view = lttng_buffer_view_from_view(
- &view->buffer, offset, sizeof(*kprobe_comm));
- if (!lttng_buffer_view_is_valid(¤t_buffer_view)) {
- ERR("Failed to initialize from malformed event rule kprobe: buffer too short to contain header.");
- ret = -1;
- goto end;
- }
-
- kprobe_comm = (typeof(kprobe_comm)) current_buffer_view.data;
-
- rule = lttng_event_rule_kernel_probe_create();
- if (!rule) {
- ERR("Failed to create event rule kprobe.");
- ret = -1;
- goto end;
- }
-
- kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
-
- /* Skip to payload */
- offset += current_buffer_view.size;
-
- {
- /* Map the name. */
- struct lttng_payload_view current_payload_view =
- lttng_payload_view_from_view(view, offset,
- kprobe_comm->name_len);
-
- if (!lttng_payload_view_is_valid(¤t_payload_view)) {
- ret = -1;
- goto end;
- }
-
- name = current_payload_view.buffer.data;
- if (!lttng_buffer_view_contains_string(
- ¤t_payload_view.buffer, name,
- kprobe_comm->name_len)) {
- ret = -1;
- goto end;
- }
- }
-
- /* Skip after the name. */
- offset += kprobe_comm->name_len;
-
- /* Map the kernel probe location. */
- {
- struct lttng_payload_view current_payload_view =
- lttng_payload_view_from_view(view, offset,
- kprobe_comm->location_len);
-
- if (!lttng_payload_view_is_valid(¤t_payload_view)) {
- ret = -1;
- goto end;
- }
-
- ret = lttng_kernel_probe_location_create_from_payload(
- ¤t_payload_view, &location);
- if (ret < 0) {
- ret = -1;
- goto end;
- }
- }
-
- if (ret != kprobe_comm->location_len) {
- ret = -1;
- goto end;
- }
-
- kprobe->location = location;
-
- /* Skip after the location */
- offset += kprobe_comm->location_len;
-
- status = lttng_event_rule_kernel_probe_set_name(rule, name);
- if (status != LTTNG_EVENT_RULE_STATUS_OK) {
- ERR("Failed to set event rule kprobe name.");
- ret = -1;
- goto end;
- }
-
- *_event_rule = rule;
- rule = NULL;
- ret = offset;
-end:
- lttng_event_rule_destroy(rule);
- return ret;
-}
-
-enum lttng_event_rule_status lttng_event_rule_kernel_probe_set_location(
- struct lttng_event_rule *rule,
- const struct lttng_kernel_probe_location *location)
-{
- struct lttng_kernel_probe_location *location_copy = NULL;
- struct lttng_event_rule_kernel_probe *kprobe;
- enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
-
- if (!rule || !IS_KPROBE_EVENT_RULE(rule) || !location) {
- status = LTTNG_EVENT_RULE_STATUS_INVALID;
- goto end;
- }
-
- kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
- location_copy = lttng_kernel_probe_location_copy(location);
- if (!location_copy) {
- status = LTTNG_EVENT_RULE_STATUS_ERROR;
- goto end;
- }
-
- if (kprobe->location) {
- lttng_kernel_probe_location_destroy(kprobe->location);
- }
-
- kprobe->location = location_copy;
- location_copy = NULL;
-end:
- lttng_kernel_probe_location_destroy(location_copy);
- return status;
-}
-
-enum lttng_event_rule_status lttng_event_rule_kernel_probe_get_location(
- const struct lttng_event_rule *rule,
- const struct lttng_kernel_probe_location **location)
-{
- enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
- struct lttng_event_rule_kernel_probe *kprobe;
-
- if (!rule || !IS_KPROBE_EVENT_RULE(rule) || !location) {
- status = LTTNG_EVENT_RULE_STATUS_INVALID;
- goto end;
- }
-
- kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
- *location = kprobe->location;
-
- if (!*location) {
- status = LTTNG_EVENT_RULE_STATUS_UNSET;
- goto end;
- }
-
-end:
- return status;
-}
-
-enum lttng_event_rule_status lttng_event_rule_kernel_probe_set_name(
- struct lttng_event_rule *rule, const char *name)
-{
- char *name_copy = NULL;
- struct lttng_event_rule_kernel_probe *kprobe;
- enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
-
- if (!rule || !IS_KPROBE_EVENT_RULE(rule) || !name ||
- strlen(name) == 0) {
- status = LTTNG_EVENT_RULE_STATUS_INVALID;
- goto end;
- }
-
- kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
- name_copy = strdup(name);
- if (!name_copy) {
- status = LTTNG_EVENT_RULE_STATUS_ERROR;
- goto end;
- }
-
- free(kprobe->name);
-
- kprobe->name = name_copy;
- name_copy = NULL;
-end:
- return status;
-}
-
-enum lttng_event_rule_status lttng_event_rule_kernel_probe_get_name(
- const struct lttng_event_rule *rule, const char **name)
-{
- struct lttng_event_rule_kernel_probe *kprobe;
- enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
-
- if (!rule || !IS_KPROBE_EVENT_RULE(rule) || !name) {
- status = LTTNG_EVENT_RULE_STATUS_INVALID;
- goto end;
- }
-
- kprobe = container_of(rule, struct lttng_event_rule_kernel_probe, parent);
- if (!kprobe->name) {
- status = LTTNG_EVENT_RULE_STATUS_UNSET;
- goto end;
- }
-
- *name = kprobe->name;
-end:
- return status;
-}
#include <common/payload-view.h>
#include <common/payload.h>
#include <lttng/domain.h>
-#include <lttng/event-rule/kprobe-internal.h>
-#include <lttng/event-rule/kprobe.h>
+#include <lttng/event-rule/kernel-probe-internal.h>
+#include <lttng/event-rule/kernel-probe.h>
#include <lttng/event-rule/syscall-internal.h>
#include <lttng/event-rule/syscall.h>
#include <lttng/event-rule/tracepoint-internal.h>
projects / lttng-tools.git / commitdiff
