free(elf_method);
break;
}
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ {
+ struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method =
+ container_of(lookup_method,
+ struct lttng_userspace_probe_location_lookup_method_sdt, parent);
+ free(sdt_method);
+ break;
+ }
default:
break;
}
return ret;
}
+struct lttng_userspace_probe_location_lookup_method *
+lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(void)
+{
+ struct lttng_userspace_probe_location_lookup_method *ret = NULL;
+ struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method;
+
+ sdt_method = zmalloc(sizeof(*sdt_method));
+ if (!sdt_method) {
+ PERROR("zmalloc");
+ goto end;
+ }
+
+ ret = &sdt_method->parent;
+ ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT;
+end:
+ return ret;
+}
+
enum lttng_userspace_probe_location_type lttng_userspace_probe_location_get_type(
const struct lttng_userspace_probe_location *location)
{
free(location);
}
+static
+void lttng_userspace_probe_location_tracepoint_destroy(
+ struct lttng_userspace_probe_location *location)
+{
+ struct lttng_userspace_probe_location_tracepoint *location_tracepoint = NULL;
+
+ assert(location);
+
+ location_tracepoint = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint,
+ parent);
+
+ assert(location_tracepoint);
+
+ free(location_tracepoint->probe_name);
+ free(location_tracepoint->provider_name);
+ free(location_tracepoint->binary_path);
+ if (location_tracepoint->binary_fd >= 0) {
+ if (close(location_tracepoint->binary_fd)) {
+ PERROR("close");
+ }
+ }
+ free(location);
+}
+
void lttng_userspace_probe_location_destroy(
struct lttng_userspace_probe_location *location)
{
case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
lttng_userspace_probe_location_function_destroy(location);
break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ lttng_userspace_probe_location_tracepoint_destroy(location);
+ break;
default:
free(location);
}
return ret;
}
+static struct lttng_userspace_probe_location *
+lttng_userspace_probe_location_tracepoint_create_no_check(const char *binary_path,
+ const char *provider_name, const char *probe_name,
+ struct lttng_userspace_probe_location_lookup_method *lookup_method,
+ bool open_binary)
+{
+ int binary_fd = -1;
+ char *probe_name_copy = NULL;
+ char *provider_name_copy = NULL;
+ char *binary_path_copy = NULL;
+ struct lttng_userspace_probe_location *ret = NULL;
+ struct lttng_userspace_probe_location_tracepoint *location;
+
+ if (open_binary) {
+ binary_fd = open(binary_path, O_RDONLY);
+ if (binary_fd < 0) {
+ PERROR("open");
+ goto error;
+ }
+ } else {
+ binary_fd = -1;
+ }
+
+ probe_name_copy = lttng_strndup(probe_name, LTTNG_SYMBOL_NAME_LEN);
+ if (!probe_name_copy) {
+ PERROR("lttng_strndup");
+ goto error;
+ }
+
+ provider_name_copy = lttng_strndup(provider_name, LTTNG_SYMBOL_NAME_LEN);
+ if (!provider_name_copy) {
+ PERROR("lttng_strndup");
+ goto error;
+ }
+
+ binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX);
+ if (!binary_path_copy) {
+ PERROR("lttng_strndup");
+ goto error;
+ }
+
+ location = zmalloc(sizeof(*location));
+ if (!location) {
+ PERROR("zmalloc");
+ goto error;
+ }
+
+ location->probe_name = probe_name_copy;
+ location->provider_name = provider_name_copy;
+ location->binary_path = binary_path_copy;
+ location->binary_fd = binary_fd;
+
+ ret = &location->parent;
+ ret->lookup_method = lookup_method;
+ ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT;
+ goto end;
+
+error:
+ free(probe_name_copy);
+ free(provider_name_copy);
+ if (binary_fd >= 0) {
+ if (close(binary_fd)) {
+ PERROR("Error closing binary fd in error path");
+ }
+ }
+end:
+ return ret;
+}
+
struct lttng_userspace_probe_location *
lttng_userspace_probe_location_function_create(const char *binary_path,
const char *function_name,
return ret;
}
+struct lttng_userspace_probe_location *
+lttng_userspace_probe_location_tracepoint_create(const char *binary_path,
+ const char *provider_name, const char *probe_name,
+ struct lttng_userspace_probe_location_lookup_method *lookup_method)
+{
+ struct lttng_userspace_probe_location *ret = NULL;
+
+ if (!binary_path || !probe_name || !provider_name) {
+ ERR("Invalid argument(s)");
+ goto end;
+ }
+
+ switch (lttng_userspace_probe_location_lookup_method_get_type(
+ lookup_method)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ break;
+ default:
+ /* Invalid probe location lookup method. */
+ goto end;
+ }
+
+ ret = lttng_userspace_probe_location_tracepoint_create_no_check(
+ binary_path, provider_name, probe_name, lookup_method, true);
+end:
+ return ret;
+}
+
static struct lttng_userspace_probe_location_lookup_method *
lttng_userspace_probe_location_lookup_method_function_elf_copy(
const struct lttng_userspace_probe_location_lookup_method *lookup_method)
return parent;
}
+static struct lttng_userspace_probe_location_lookup_method *
+lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy(
+ struct lttng_userspace_probe_location_lookup_method *lookup_method)
+{
+ struct lttng_userspace_probe_location_lookup_method *parent = NULL;
+ struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method;
+
+ assert(lookup_method);
+ assert(lookup_method->type ==
+ LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT);
+
+ sdt_method = zmalloc(sizeof(*sdt_method));
+ if (!sdt_method) {
+ PERROR("zmalloc");
+ goto error;
+ }
+
+ sdt_method->parent.type = lookup_method->type;
+ parent = &sdt_method->parent;
+
+ goto end;
+
+error:
+ parent = NULL;
+end:
+ return parent;
+}
+
static struct lttng_userspace_probe_location *
lttng_userspace_probe_location_function_copy(
const struct lttng_userspace_probe_location *location)
return new_location;
}
+static struct lttng_userspace_probe_location *
+lttng_userspace_probe_location_tracepoint_copy(
+ const struct lttng_userspace_probe_location *location)
+{
+ enum lttng_userspace_probe_location_lookup_method_type lookup_type;
+ struct lttng_userspace_probe_location *new_location = NULL;
+ struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL;
+ char *binary_path = NULL;
+ char *probe_name = NULL;
+ char *provider_name = NULL;
+ int fd;
+
+ assert(location);
+ assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT);
+
+ /* Duplicate probe location fields */
+ binary_path =
+ lttng_strndup(lttng_userspace_probe_location_tracepoint_get_binary_path(location),
+ LTTNG_PATH_MAX);
+ if (!binary_path) {
+ PERROR("lttng_strndup");
+ goto error;
+ }
+
+ probe_name =
+ lttng_strndup(lttng_userspace_probe_location_tracepoint_get_probe_name(location),
+ LTTNG_SYMBOL_NAME_LEN);
+ if (!probe_name) {
+ PERROR("lttng_strndup");
+ goto error;
+ }
+
+ provider_name =
+ lttng_strndup(lttng_userspace_probe_location_tracepoint_get_provider_name(location),
+ LTTNG_SYMBOL_NAME_LEN);
+ if (!provider_name) {
+ PERROR("lttng_strndup");
+ goto error;
+ }
+
+ /* Duplicate the binary fd */
+ fd = dup(lttng_userspace_probe_location_tracepoint_get_binary_fd(location));
+ if (fd == -1) {
+ PERROR("dup");
+ goto error;
+ }
+
+ /*
+ * Duplicate probe location method fields
+ */
+ lookup_type = lttng_userspace_probe_location_lookup_method_get_type(
+ location->lookup_method);
+ switch (lookup_type) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ lookup_method =
+ lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy(
+ location->lookup_method);
+ if (!lookup_method) {
+ goto close_fd;
+ }
+ break;
+ default:
+ /* Invalid probe location lookup method. */
+ goto close_fd;
+ }
+
+ /* Create the probe_location */
+ new_location = lttng_userspace_probe_location_tracepoint_create_no_check(
+ binary_path, provider_name, probe_name, lookup_method, true);
+ if (!new_location) {
+ goto destroy_lookup_method;
+ }
+
+ /* Set the duplicated fd to the new probe_location */
+ if (lttng_userspace_probe_location_tracepoint_set_binary_fd(new_location, fd) < 0) {
+ goto destroy_probe_location;
+ }
+
+ goto end;
+
+destroy_probe_location:
+ lttng_userspace_probe_location_destroy(new_location);
+destroy_lookup_method:
+ lttng_userspace_probe_location_lookup_method_destroy(lookup_method);
+close_fd:
+ if (close(fd) < 0) {
+ PERROR("close");
+ }
+error:
+ free(provider_name);
+ free(probe_name);
+ free(binary_path);
+ new_location = NULL;
+end:
+ return new_location;
+}
+
const char *lttng_userspace_probe_location_function_get_binary_path(
const struct lttng_userspace_probe_location *location)
{
return ret;
}
+const char *lttng_userspace_probe_location_tracepoint_get_binary_path(
+ const struct lttng_userspace_probe_location *location)
+{
+ const char *ret = NULL;
+ struct lttng_userspace_probe_location_tracepoint *tracepoint_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) {
+ ERR("Invalid argument(s)");
+ goto end;
+ }
+
+ tracepoint_location = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint,
+ parent);
+ ret = tracepoint_location->binary_path;
+end:
+ return ret;
+}
+
const char *lttng_userspace_probe_location_function_get_function_name(
const struct lttng_userspace_probe_location *location)
{
return ret;
}
+const char *lttng_userspace_probe_location_tracepoint_get_probe_name(
+ const struct lttng_userspace_probe_location *location)
+{
+ const char *ret = NULL;
+ struct lttng_userspace_probe_location_tracepoint *tracepoint_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) {
+ ERR("Invalid argument(s)");
+ goto end;
+ }
+
+ tracepoint_location = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint, parent);
+ ret = tracepoint_location->probe_name;
+end:
+ return ret;
+}
+
+const char *lttng_userspace_probe_location_tracepoint_get_provider_name(
+ const struct lttng_userspace_probe_location *location)
+{
+ const char *ret = NULL;
+ struct lttng_userspace_probe_location_tracepoint *tracepoint_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) {
+ ERR("Invalid argument(s)");
+ goto end;
+ }
+
+ tracepoint_location = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint, parent);
+ ret = tracepoint_location->provider_name;
+end:
+ return ret;
+}
+
int lttng_userspace_probe_location_function_get_binary_fd(
const struct lttng_userspace_probe_location *location)
{
return ret;
}
+int lttng_userspace_probe_location_tracepoint_get_binary_fd(
+ const struct lttng_userspace_probe_location *location)
+{
+ int ret = -1;
+ struct lttng_userspace_probe_location_tracepoint *tracepoint_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) {
+ ERR("Invalid argument(s)");
+ goto end;
+ }
+
+ tracepoint_location = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint, parent);
+ ret = tracepoint_location->binary_fd;
+end:
+ return ret;
+}
+
static struct lttng_userspace_probe_location_lookup_method *
lttng_userspace_probe_location_function_get_lookup_method(
const struct lttng_userspace_probe_location *location)
return ret;
}
+static struct lttng_userspace_probe_location_lookup_method *
+lttng_userspace_probe_location_tracepoint_get_lookup_method(
+ const struct lttng_userspace_probe_location *location)
+{
+ struct lttng_userspace_probe_location_lookup_method *ret = NULL;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) {
+ ERR("Invalid argument(s)");
+ goto end;
+ }
+
+ ret = location->lookup_method;
+end:
+ return ret;
+}
+
struct lttng_userspace_probe_location_lookup_method *
lttng_userspace_probe_location_get_lookup_method(
const struct lttng_userspace_probe_location *location)
ret = lttng_userspace_probe_location_function_get_lookup_method(
location);
break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ ret = lttng_userspace_probe_location_tracepoint_get_lookup_method(
+ location);
+ break;
default:
ERR("Unknowned lookup method.");
break;
goto end;
}
}
- ret = sizeof(lookup_method_comm);
+ ret = sizeof(lookup_method_comm);
+end:
+ return ret;
+}
+
+static
+int lttng_userspace_probe_location_function_serialize(
+ const struct lttng_userspace_probe_location *location,
+ struct lttng_dynamic_buffer *buffer,
+ int *binary_fd)
+{
+ int ret;
+ size_t function_name_len, binary_path_len;
+ struct lttng_userspace_probe_location_function *location_function;
+ struct lttng_userspace_probe_location_function_comm location_function_comm;
+
+ assert(location);
+ assert(lttng_userspace_probe_location_get_type(location) ==
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION);
+
+ location_function = container_of(location,
+ struct lttng_userspace_probe_location_function,
+ parent);
+ if (!location_function->function_name || !location_function->binary_path) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (binary_fd && location_function->binary_fd < 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (binary_fd) {
+ *binary_fd = location_function->binary_fd;
+ }
+
+ function_name_len = strlen(location_function->function_name);
+ if (function_name_len == 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ binary_path_len = strlen(location_function->binary_path);
+ if (binary_path_len == 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ location_function_comm.function_name_len = function_name_len + 1;
+ location_function_comm.binary_path_len = binary_path_len + 1;
+
+ if (buffer) {
+ ret = lttng_dynamic_buffer_append(buffer,
+ &location_function_comm,
+ sizeof(location_function_comm));
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(buffer,
+ location_function->function_name,
+ location_function_comm.function_name_len);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(buffer,
+ location_function->binary_path,
+ location_function_comm.binary_path_len);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ }
+ ret = sizeof(location_function_comm) +
+ location_function_comm.function_name_len +
+ location_function_comm.binary_path_len;
end:
return ret;
}
static
-int lttng_userspace_probe_location_function_serialize(
+int lttng_userspace_probe_location_tracepoint_serialize(
const struct lttng_userspace_probe_location *location,
struct lttng_dynamic_buffer *buffer,
int *binary_fd)
{
int ret;
- size_t function_name_len, binary_path_len;
- struct lttng_userspace_probe_location_function *location_function;
- struct lttng_userspace_probe_location_function_comm location_function_comm;
+ size_t probe_name_len, provider_name_len, binary_path_len;
+ struct lttng_userspace_probe_location_tracepoint *location_tracepoint;
+ struct lttng_userspace_probe_location_tracepoint_comm location_tracepoint_comm;
assert(location);
assert(lttng_userspace_probe_location_get_type(location) ==
- LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION);
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT);
- location_function = container_of(location,
- struct lttng_userspace_probe_location_function,
+ location_tracepoint = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint,
parent);
- if (!location_function->function_name || !location_function->binary_path) {
+ if (!location_tracepoint->probe_name ||
+ !location_tracepoint->provider_name ||
+ !location_tracepoint->binary_path) {
ret = -LTTNG_ERR_INVALID;
goto end;
}
- if (binary_fd && location_function->binary_fd < 0) {
+ if (binary_fd && location_tracepoint->binary_fd < 0) {
ret = -LTTNG_ERR_INVALID;
goto end;
}
if (binary_fd) {
- *binary_fd = location_function->binary_fd;
+ *binary_fd = location_tracepoint->binary_fd;
}
- function_name_len = strlen(location_function->function_name);
- if (function_name_len == 0) {
+ probe_name_len = strlen(location_tracepoint->probe_name);
+ if (probe_name_len == 0) {
ret = -LTTNG_ERR_INVALID;
goto end;
}
- binary_path_len = strlen(location_function->binary_path);
+
+ provider_name_len = strlen(location_tracepoint->provider_name);
+ if (provider_name_len == 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ binary_path_len = strlen(location_tracepoint->binary_path);
if (binary_path_len == 0) {
ret = -LTTNG_ERR_INVALID;
goto end;
}
- location_function_comm.function_name_len = function_name_len + 1;
- location_function_comm.binary_path_len = binary_path_len + 1;
+ location_tracepoint_comm.probe_name_len = probe_name_len + 1;
+ location_tracepoint_comm.provider_name_len = provider_name_len + 1;
+ location_tracepoint_comm.binary_path_len = binary_path_len + 1;
if (buffer) {
ret = lttng_dynamic_buffer_append(buffer,
- &location_function_comm,
- sizeof(location_function_comm));
+ &location_tracepoint_comm,
+ sizeof(location_tracepoint_comm));
if (ret) {
ret = -LTTNG_ERR_INVALID;
goto end;
}
ret = lttng_dynamic_buffer_append(buffer,
- location_function->function_name,
- location_function_comm.function_name_len);
+ location_tracepoint->probe_name,
+ location_tracepoint_comm.probe_name_len);
if (ret) {
ret = -LTTNG_ERR_INVALID;
goto end;
}
ret = lttng_dynamic_buffer_append(buffer,
- location_function->binary_path,
- location_function_comm.binary_path_len);
+ location_tracepoint->provider_name,
+ location_tracepoint_comm.provider_name_len);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(buffer,
+ location_tracepoint->binary_path,
+ location_tracepoint_comm.binary_path_len);
if (ret) {
ret = -LTTNG_ERR_INVALID;
goto end;
}
}
- ret = sizeof(location_function_comm) +
- location_function_comm.function_name_len +
- location_function_comm.binary_path_len;
+ ret = sizeof(location_tracepoint_comm) +
+ location_tracepoint_comm.probe_name_len +
+ location_tracepoint_comm.provider_name_len +
+ location_tracepoint_comm.binary_path_len;
end:
return ret;
}
ret = lttng_userspace_probe_location_function_serialize(
location, buffer, binary_fd);
break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ ret = lttng_userspace_probe_location_tracepoint_serialize(
+ location, buffer, binary_fd);
+ break;
default:
ERR("Unsupported probe location type");
ret = -LTTNG_ERR_INVALID;
return ret;
}
+static
+int lttng_userspace_probe_location_tracepoint_create_from_buffer(
+ const struct lttng_buffer_view *buffer,
+ struct lttng_userspace_probe_location **location)
+{
+ struct lttng_userspace_probe_location_tracepoint_comm *location_tracepoint_comm;
+ const char *probe_name_src, *provider_name_src, *binary_path_src;
+ char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL;
+ int ret = 0;
+
+ assert(buffer);
+ assert(buffer->data);
+ assert(location);
+
+ location_tracepoint_comm =
+ (struct lttng_userspace_probe_location_tracepoint_comm *) buffer->data;
+
+ const size_t expected_size = sizeof(*location_tracepoint_comm) +
+ location_tracepoint_comm->probe_name_len +
+ location_tracepoint_comm->provider_name_len +
+ location_tracepoint_comm->binary_path_len;
+
+ if (buffer->size < expected_size) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ probe_name_src = buffer->data + sizeof(*location_tracepoint_comm);
+ provider_name_src = probe_name_src +
+ location_tracepoint_comm->probe_name_len;
+ binary_path_src = provider_name_src +
+ location_tracepoint_comm->provider_name_len;
+
+ if (probe_name_src[location_tracepoint_comm->probe_name_len - 1] != '\0') {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (provider_name_src[location_tracepoint_comm->provider_name_len - 1] != '\0') {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (binary_path_src[location_tracepoint_comm->binary_path_len - 1] != '\0') {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN);
+ if (!probe_name) {
+ PERROR("lttng_strndup");
+ goto end;
+ }
+ provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN);
+ if (!provider_name) {
+ PERROR("lttng_strndup");
+ goto end;
+ }
+
+ binary_path = lttng_strndup(binary_path_src, LTTNG_SYMBOL_NAME_LEN);
+ if (!binary_path) {
+ PERROR("lttng_strndup");
+ goto end;
+ }
+
+ *location = lttng_userspace_probe_location_tracepoint_create_no_check(
+ binary_path, provider_name, probe_name, NULL, false);
+ if (!(*location)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ ret = (int) expected_size;
+end:
+ free(probe_name);
+ free(provider_name);
+ free(binary_path);
+ return ret;
+}
+
static
int lttng_userspace_probe_location_lookup_method_create_from_buffer(
struct lttng_buffer_view *buffer,
goto end;
}
break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ *lookup_method =
+ lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create();
+ if (!(*lookup_method)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ break;
default:
ret = -LTTNG_ERR_INVALID;
goto end;
}
break;
}
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ {
+ struct lttng_buffer_view view = lttng_buffer_view_from_view(
+ buffer, consumed, buffer->size - consumed);
+
+ ret = lttng_userspace_probe_location_tracepoint_create_from_buffer(
+ &view, location);
+ if (ret < 0) {
+ goto end;
+ }
+ break;
+ }
default:
ret = -LTTNG_ERR_INVALID;
goto end;
return ret;
}
+LTTNG_HIDDEN
+int lttng_userspace_probe_location_tracepoint_set_binary_fd(
+ struct lttng_userspace_probe_location *location, int binary_fd)
+{
+ int ret = 0;
+ struct lttng_userspace_probe_location_tracepoint *tracepoint_location;
+
+ assert(location);
+ assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT);
+
+ tracepoint_location = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint, parent);
+ if (tracepoint_location->binary_fd >= 0) {
+ ret = close(tracepoint_location->binary_fd);
+ if (ret) {
+ PERROR("close");
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ }
+
+ tracepoint_location->binary_fd = binary_fd;
+end:
+ return ret;
+}
+
static
int lttng_userspace_probe_location_function_flatten(
const struct lttng_userspace_probe_location *location,
return ret;
}
+static
+int lttng_userspace_probe_location_tracepoint_flatten(
+ const struct lttng_userspace_probe_location *location,
+ struct lttng_dynamic_buffer *buffer)
+{
+ struct lttng_userspace_probe_location_lookup_method_sdt flat_lookup_method;
+ struct lttng_userspace_probe_location_tracepoint *probe_tracepoint;
+ struct lttng_userspace_probe_location_tracepoint flat_probe;
+ size_t probe_name_len, provider_name_len, binary_path_len;
+ size_t padding_needed = 0;
+ int storage_needed = 0;
+ char *flat_probe_start;
+ int ret = 0;
+
+ assert(location);
+
+ /* Only SDT tracepoints are supported at the moment */
+ if (location->lookup_method && location->lookup_method->type !=
+ LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ probe_tracepoint = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint,
+ parent);
+ assert(probe_tracepoint->probe_name);
+ assert(probe_tracepoint->provider_name);
+ assert(probe_tracepoint->binary_path);
+
+ /* Compute the storage space needed to flatten the probe location */
+ storage_needed += sizeof(struct lttng_userspace_probe_location_tracepoint);
+
+ probe_name_len = strlen(probe_tracepoint->probe_name) + 1;
+ provider_name_len = strlen(probe_tracepoint->provider_name) + 1;
+ binary_path_len = strlen(probe_tracepoint->binary_path) + 1;
+
+ storage_needed += probe_name_len + provider_name_len + binary_path_len;
+
+ /*
+ * The lookup method is aligned to 64-bit within the buffer.
+ * This is needed even if there is no lookup method since
+ * the next structure in the buffer probably needs to be
+ * aligned too (depending on the arch).
+ */
+ padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed;
+ storage_needed += padding_needed;
+
+ if (location->lookup_method) {
+ /* NOTE: elf look-up method is assumed here. */
+ storage_needed +=
+ sizeof(struct lttng_userspace_probe_location_lookup_method_elf);
+ }
+
+ /*
+ * If the caller set buffer to NULL, return the size of the needed buffer.
+ */
+ if (!buffer) {
+ ret = storage_needed;
+ goto end;
+ }
+
+ if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) {
+ ret = lttng_dynamic_buffer_set_capacity(buffer,
+ buffer->size + storage_needed);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ memset(&flat_probe, 0, sizeof(flat_probe));
+
+ flat_probe_start = buffer->data + buffer->size;
+ flat_probe.parent.type = location->type;
+
+ /*
+ * The lookup method, if present, is the last element in the flat
+ * representation of the probe.
+ */
+ if (location->lookup_method) {
+ flat_probe.parent.lookup_method =
+ (struct lttng_userspace_probe_location_lookup_method *)
+ (flat_probe_start + sizeof(flat_probe) +
+ probe_name_len + provider_name_len +
+ binary_path_len + padding_needed);
+ } else {
+ flat_probe.parent.lookup_method = NULL;
+ }
+
+ flat_probe.probe_name = flat_probe_start + sizeof(flat_probe);
+ flat_probe.provider_name = flat_probe.probe_name + probe_name_len;
+ flat_probe.binary_path = flat_probe.provider_name + provider_name_len;
+ flat_probe.binary_fd = -1;
+ ret = lttng_dynamic_buffer_append(buffer, &flat_probe, sizeof(flat_probe));
+ if (ret) {
+ goto end;
+ }
+
+ /* Append all the fields to the buffer */
+ ret = lttng_dynamic_buffer_append(buffer,
+ probe_tracepoint->probe_name, probe_name_len);
+ if (ret) {
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(buffer,
+ probe_tracepoint->provider_name, provider_name_len);
+ if (ret) {
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(buffer,
+ probe_tracepoint->binary_path, binary_path_len);
+ if (ret) {
+ goto end;
+ }
+
+ /* Insert padding before the lookup method. */
+ ret = lttng_dynamic_buffer_set_size(buffer, buffer->size + padding_needed);
+ if (ret) {
+ goto end;
+ }
+
+ if (!location->lookup_method) {
+ /* Not an error, the default method is used. */
+ ret = storage_needed;
+ goto end;
+ }
+
+ memset(&flat_lookup_method, 0, sizeof(flat_lookup_method));
+
+ flat_lookup_method.parent.type =
+ LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT;
+ ret = lttng_dynamic_buffer_append(buffer,
+ &flat_lookup_method, sizeof(flat_lookup_method));
+ if (ret) {
+ goto end;
+ }
+ ret = storage_needed;
+end:
+ return ret;
+}
+
LTTNG_HIDDEN
int lttng_userspace_probe_location_flatten(
const struct lttng_userspace_probe_location *location,
case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
ret = lttng_userspace_probe_location_function_flatten(location, buffer);
break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ ret = lttng_userspace_probe_location_tracepoint_flatten(location, buffer);
+ break;
default:
ret = -LTTNG_ERR_INVALID;
goto end;
goto err;
}
break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ new_location =
+ lttng_userspace_probe_location_tracepoint_copy(location);
+ if (!new_location) {
+ goto err;
+ }
+ break;
default:
new_location = NULL;
goto err;
projects / lttng-tools.git / commitdiff
