--- /dev/null
+/*
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include "lttng/lttng-error.h"
+#include <common/compat/string.h>
+#include <common/align.h>
+#include <common/error.h>
+#include <common/hashtable/hashtable.h>
+#include <common/hashtable/utils.h>
+#include <common/macros.h>
+#include <common/mi-lttng.h>
+#include <common/payload-view.h>
+#include <common/payload.h>
+#include <fcntl.h>
+#include <lttng/constant.h>
+#include <lttng/userspace-probe-internal.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+static
+int lttng_userspace_probe_location_function_set_binary_fd_handle(
+ struct lttng_userspace_probe_location *location,
+ struct fd_handle *binary_fd_handle);
+
+static
+int lttng_userspace_probe_location_tracepoint_set_binary_fd_handle(
+ struct lttng_userspace_probe_location *location,
+ struct fd_handle *binary_fd_handle);
+
+static
+enum lttng_error_code lttng_userspace_probe_location_lookup_method_mi_serialize(
+ const struct lttng_userspace_probe_location_lookup_method
+ *method,
+ struct mi_writer *writer);
+
+static
+enum lttng_error_code lttng_userspace_probe_location_tracepoint_mi_serialize(
+ const struct lttng_userspace_probe_location *location,
+ struct mi_writer *writer);
+
+static
+enum lttng_error_code lttng_userspace_probe_location_function_mi_serialize(
+ const struct lttng_userspace_probe_location *location,
+ struct mi_writer *writer);
+
+enum lttng_userspace_probe_location_lookup_method_type
+lttng_userspace_probe_location_lookup_method_get_type(
+ const struct lttng_userspace_probe_location_lookup_method *lookup_method)
+{
+ return lookup_method ? lookup_method->type :
+ LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_UNKNOWN;
+}
+
+void lttng_userspace_probe_location_lookup_method_destroy(
+ struct lttng_userspace_probe_location_lookup_method *lookup_method)
+{
+ if (!lookup_method){
+ return;
+ }
+
+ free(lookup_method);
+}
+
+struct lttng_userspace_probe_location_lookup_method *
+lttng_userspace_probe_location_lookup_method_function_elf_create(void)
+{
+ struct lttng_userspace_probe_location_lookup_method *ret = NULL;
+ struct lttng_userspace_probe_location_lookup_method_elf *elf_method;
+
+ elf_method = (lttng_userspace_probe_location_lookup_method_elf *) zmalloc(sizeof(*elf_method));
+ if (!elf_method) {
+ PERROR("zmalloc");
+ goto end;
+ }
+
+ ret = &elf_method->parent;
+ ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF;
+end:
+ 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 = (lttng_userspace_probe_location_lookup_method_sdt *) 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)
+{
+ return location ? location->type :
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN;
+}
+
+static
+void lttng_userspace_probe_location_function_destroy(
+ struct lttng_userspace_probe_location *location)
+{
+ struct lttng_userspace_probe_location_function *location_function = NULL;
+
+ LTTNG_ASSERT(location);
+
+ location_function = container_of(location,
+ struct lttng_userspace_probe_location_function, parent);
+
+ LTTNG_ASSERT(location_function);
+
+ free(location_function->function_name);
+ free(location_function->binary_path);
+ fd_handle_put(location_function->binary_fd_handle);
+ 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;
+
+ LTTNG_ASSERT(location);
+
+ location_tracepoint = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint,
+ parent);
+
+ LTTNG_ASSERT(location_tracepoint);
+
+ free(location_tracepoint->probe_name);
+ free(location_tracepoint->provider_name);
+ free(location_tracepoint->binary_path);
+ fd_handle_put(location_tracepoint->binary_fd_handle);
+ free(location);
+}
+
+void lttng_userspace_probe_location_destroy(
+ struct lttng_userspace_probe_location *location)
+{
+ if (!location) {
+ return;
+ }
+
+ lttng_userspace_probe_location_lookup_method_destroy(
+ location->lookup_method);
+
+ switch (location->type) {
+ 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:
+ abort();
+ }
+}
+
+/* Compare two file descriptors based on their inode and device numbers. */
+static bool fd_is_equal(int a, int b)
+{
+ int ret;
+ bool is_equal = false;
+ struct stat a_stat, b_stat;
+
+ if (a < 0 && b >= 0) {
+ goto end;
+ }
+
+ if (b < 0 && a >= 0) {
+ goto end;
+ }
+
+ if (a < 0 && b < 0) {
+ if (a == -1 && b == -1) {
+ is_equal = true;
+ goto end;
+ }
+
+ /* Invalid state, abort. */
+ abort();
+ }
+
+ /* Both are valid file descriptors. */
+ ret = fstat(a, &a_stat);
+ if (ret) {
+ PERROR("Failed to fstat userspace probe location binary fd %d",
+ a);
+ goto end;
+ }
+
+ ret = fstat(b, &b_stat);
+ if (ret) {
+ PERROR("Failed to fstat userspace probe location binary fd %d",
+ b);
+ goto end;
+ }
+
+ is_equal = (a_stat.st_ino == b_stat.st_ino) &&
+ (a_stat.st_dev == b_stat.st_dev);
+
+end:
+ return is_equal;
+}
+
+static unsigned long lttng_userspace_probe_location_function_hash(
+ const struct lttng_userspace_probe_location *location)
+{
+ unsigned long hash = hash_key_ulong(
+ (void *) LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION,
+ lttng_ht_seed);
+ struct lttng_userspace_probe_location_function *function_location =
+ container_of(location, typeof(*function_location),
+ parent);
+
+ hash ^= hash_key_str(function_location->function_name, lttng_ht_seed);
+ hash ^= hash_key_str(function_location->binary_path, lttng_ht_seed);
+ /*
+ * No need to hash on the fd. Worst comes to worse,
+ * the equal function will discriminate.
+ */
+ return hash;
+}
+
+static bool lttng_userspace_probe_location_function_is_equal(
+ const struct lttng_userspace_probe_location *_a,
+ const struct lttng_userspace_probe_location *_b)
+{
+ bool is_equal = false;
+ struct lttng_userspace_probe_location_function *a, *b;
+
+ a = container_of(_a, struct lttng_userspace_probe_location_function,
+ parent);
+ b = container_of(_b, struct lttng_userspace_probe_location_function,
+ parent);
+
+ if (a->instrumentation_type != b->instrumentation_type) {
+ goto end;
+ }
+
+ LTTNG_ASSERT(a->function_name);
+ LTTNG_ASSERT(b->function_name);
+ if (strcmp(a->function_name, b->function_name)) {
+ goto end;
+ }
+
+ LTTNG_ASSERT(a->binary_path);
+ LTTNG_ASSERT(b->binary_path);
+ if (strcmp(a->binary_path, b->binary_path)) {
+ goto end;
+ }
+
+ is_equal = fd_is_equal(a->binary_fd_handle ? fd_handle_get_fd(a->binary_fd_handle) : -1,
+ b->binary_fd_handle ? fd_handle_get_fd(b->binary_fd_handle) : -1);
+end:
+ return is_equal;
+}
+
+static struct lttng_userspace_probe_location *
+lttng_userspace_probe_location_function_create_no_check(const char *binary_path,
+ const char *function_name,
+ struct lttng_userspace_probe_location_lookup_method *lookup_method,
+ bool open_binary)
+{
+ int binary_fd = -1;
+ struct fd_handle *binary_fd_handle = NULL;
+ char *function_name_copy = NULL, *binary_path_copy = NULL;
+ struct lttng_userspace_probe_location *ret = NULL;
+ struct lttng_userspace_probe_location_function *location;
+
+ if (open_binary) {
+ binary_fd = open(binary_path, O_RDONLY);
+ if (binary_fd < 0) {
+ PERROR("Error opening the binary");
+ goto error;
+ }
+
+ binary_fd_handle = fd_handle_create(binary_fd);
+ if (!binary_fd) {
+ goto error;
+ }
+
+ /* Ownership transferred to fd_handle. */
+ binary_fd = -1;
+ }
+
+ function_name_copy = lttng_strndup(function_name, LTTNG_SYMBOL_NAME_LEN);
+ if (!function_name_copy) {
+ PERROR("Error duplicating the function name");
+ goto error;
+ }
+
+ binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX);
+ if (!binary_path_copy) {
+ PERROR("Error duplicating the function name");
+ goto error;
+ }
+
+ location = (lttng_userspace_probe_location_function *) zmalloc(sizeof(*location));
+ if (!location) {
+ PERROR("Error allocating userspace probe location");
+ goto error;
+ }
+
+ location->function_name = function_name_copy;
+ location->binary_path = binary_path_copy;
+ location->binary_fd_handle = binary_fd_handle;
+ binary_fd_handle = NULL;
+ location->instrumentation_type =
+ LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY;
+
+ ret = &location->parent;
+ ret->lookup_method = lookup_method;
+ ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION;
+ ret->equal = lttng_userspace_probe_location_function_is_equal;
+ ret->hash = lttng_userspace_probe_location_function_hash;
+ goto end;
+
+error:
+ free(function_name_copy);
+ free(binary_path_copy);
+ if (binary_fd >= 0) {
+ if (close(binary_fd)) {
+ PERROR("Error closing binary fd in error path");
+ }
+ }
+ fd_handle_put(binary_fd_handle);
+end:
+ return ret;
+}
+
+static unsigned long lttng_userspace_probe_location_tracepoint_hash(
+ const struct lttng_userspace_probe_location *location)
+{
+ unsigned long hash = hash_key_ulong(
+ (void *) LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT,
+ lttng_ht_seed);
+ struct lttng_userspace_probe_location_tracepoint *tp_location =
+ container_of(location, typeof(*tp_location), parent);
+
+ hash ^= hash_key_str(tp_location->probe_name, lttng_ht_seed);
+ hash ^= hash_key_str(tp_location->provider_name, lttng_ht_seed);
+ hash ^= hash_key_str(tp_location->binary_path, lttng_ht_seed);
+ /*
+ * No need to hash on the fd. Worst comes to worse,
+ * the equal function will discriminate.
+ */
+ return hash;
+}
+
+static bool lttng_userspace_probe_location_tracepoint_is_equal(
+ const struct lttng_userspace_probe_location *_a,
+ const struct lttng_userspace_probe_location *_b)
+{
+ bool is_equal = false;
+ struct lttng_userspace_probe_location_tracepoint *a, *b;
+
+ a = container_of(_a, struct lttng_userspace_probe_location_tracepoint,
+ parent);
+ b = container_of(_b, struct lttng_userspace_probe_location_tracepoint,
+ parent);
+
+ LTTNG_ASSERT(a->probe_name);
+ LTTNG_ASSERT(b->probe_name);
+ if (strcmp(a->probe_name, b->probe_name)) {
+ goto end;
+ }
+
+ LTTNG_ASSERT(a->provider_name);
+ LTTNG_ASSERT(b->provider_name);
+ if (strcmp(a->provider_name, b->provider_name)) {
+ goto end;
+ }
+
+ LTTNG_ASSERT(a->binary_path);
+ LTTNG_ASSERT(b->binary_path);
+ if (strcmp(a->binary_path, b->binary_path)) {
+ goto end;
+ }
+
+ is_equal = fd_is_equal(a->binary_fd_handle ? fd_handle_get_fd(a->binary_fd_handle) : -1,
+ b->binary_fd_handle ? fd_handle_get_fd(b->binary_fd_handle) : -1);
+
+end:
+ return is_equal;
+}
+
+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;
+ struct fd_handle *binary_fd_handle = NULL;
+ 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;
+ }
+
+ binary_fd_handle = fd_handle_create(binary_fd);
+ if (!binary_fd) {
+ goto error;
+ }
+
+ /* Ownership transferred to fd_handle. */
+ 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 = (lttng_userspace_probe_location_tracepoint *) 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_handle = binary_fd_handle;
+ binary_fd_handle = NULL;
+
+ ret = &location->parent;
+ ret->lookup_method = lookup_method;
+ ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT;
+ ret->equal = lttng_userspace_probe_location_tracepoint_is_equal;
+ ret->hash = lttng_userspace_probe_location_tracepoint_hash;
+ goto end;
+
+error:
+ free(probe_name_copy);
+ free(provider_name_copy);
+ free(binary_path_copy);
+ if (binary_fd >= 0) {
+ if (close(binary_fd)) {
+ PERROR("Error closing binary fd in error path");
+ }
+ }
+ fd_handle_put(binary_fd_handle);
+end:
+ return ret;
+}
+
+struct lttng_userspace_probe_location *
+lttng_userspace_probe_location_function_create(const char *binary_path,
+ const char *function_name,
+ struct lttng_userspace_probe_location_lookup_method *lookup_method)
+{
+ struct lttng_userspace_probe_location *ret = NULL;
+
+ if (!binary_path || !function_name) {
+ ERR("Invalid argument(s) passed to '%s'", __FUNCTION__);
+ goto end;
+ }
+
+ switch (lttng_userspace_probe_location_lookup_method_get_type(
+ lookup_method)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
+ break;
+ default:
+ /* Invalid probe location lookup method. */
+ goto end;
+ }
+
+ ret = lttng_userspace_probe_location_function_create_no_check(
+ binary_path, function_name, lookup_method, true);
+end:
+ 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) passed to '%s'", __FUNCTION__);
+ 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)
+{
+ struct lttng_userspace_probe_location_lookup_method *parent = NULL;
+ struct lttng_userspace_probe_location_lookup_method_elf *elf_method;
+
+ LTTNG_ASSERT(lookup_method);
+ LTTNG_ASSERT(lookup_method->type ==
+ LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF);
+
+ elf_method = (lttng_userspace_probe_location_lookup_method_elf *) zmalloc(sizeof(*elf_method));
+ if (!elf_method) {
+ PERROR("Error allocating ELF userspace probe lookup method");
+ goto error;
+ }
+
+ elf_method->parent.type = lookup_method->type;
+ parent = &elf_method->parent;
+
+ goto end;
+error:
+ parent = NULL;
+end:
+ 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;
+
+ LTTNG_ASSERT(lookup_method);
+ LTTNG_ASSERT(lookup_method->type ==
+ LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT);
+
+ sdt_method = (lttng_userspace_probe_location_lookup_method_sdt *) 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)
+{
+ 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;
+ const char *binary_path = NULL;
+ const char *function_name = NULL;
+ struct lttng_userspace_probe_location_function *function_location;
+
+ LTTNG_ASSERT(location);
+ LTTNG_ASSERT(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION);
+ function_location = container_of(
+ location, typeof(*function_location), parent);
+
+ /* Get probe location fields */
+ binary_path = lttng_userspace_probe_location_function_get_binary_path(location);
+ if (!binary_path) {
+ ERR("Userspace probe binary path is NULL");
+ goto error;
+ }
+
+ function_name = lttng_userspace_probe_location_function_get_function_name(location);
+ if (!function_name) {
+ ERR("Userspace probe function name is NULL");
+ 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_FUNCTION_ELF:
+ lookup_method =
+ lttng_userspace_probe_location_lookup_method_function_elf_copy(
+ location->lookup_method);
+ if (!lookup_method) {
+ goto error;
+ }
+ break;
+ default:
+ /* Invalid probe location lookup method. */
+ goto error;
+ }
+
+ /* Create the probe_location */
+ new_location = lttng_userspace_probe_location_function_create_no_check(
+ binary_path, function_name, lookup_method, false);
+ if (!new_location) {
+ goto destroy_lookup_method;
+ }
+
+ /* Set the duplicated fd to the new probe_location */
+ if (lttng_userspace_probe_location_function_set_binary_fd_handle(new_location,
+ function_location->binary_fd_handle) < 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);
+error:
+ new_location = NULL;
+end:
+ 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;
+ const char *binary_path = NULL;
+ const char *probe_name = NULL;
+ const char *provider_name = NULL;
+ struct lttng_userspace_probe_location_tracepoint *tracepoint_location;
+
+ LTTNG_ASSERT(location);
+ LTTNG_ASSERT(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT);
+ tracepoint_location = container_of(
+ location, typeof(*tracepoint_location), parent);
+
+ /* Get probe location fields */
+ binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location);
+ if (!binary_path) {
+ ERR("Userspace probe binary path is NULL");
+ goto error;
+ }
+
+ probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location);
+ if (!probe_name) {
+ ERR("Userspace probe probe name is NULL");
+ goto error;
+ }
+
+ provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location);
+ if (!provider_name) {
+ ERR("Userspace probe provider name is NULL");
+ 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 error;
+ }
+ break;
+ default:
+ /* Invalid probe location lookup method. */
+ goto error;
+ }
+
+ /* Create the probe_location */
+ new_location = lttng_userspace_probe_location_tracepoint_create_no_check(
+ binary_path, provider_name, probe_name, lookup_method, false);
+ 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_handle(new_location,
+ tracepoint_location->binary_fd_handle) < 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);
+error:
+ new_location = NULL;
+end:
+ return new_location;
+}
+
+const char *lttng_userspace_probe_location_function_get_binary_path(
+ const struct lttng_userspace_probe_location *location)
+{
+ const char *ret = NULL;
+ struct lttng_userspace_probe_location_function *function_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) {
+ ERR("Invalid argument(s) passed to '%s'", __FUNCTION__);
+ goto end;
+ }
+
+ function_location = container_of(location,
+ struct lttng_userspace_probe_location_function,
+ parent);
+ ret = function_location->binary_path;
+end:
+ 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) passed to '%s'", __FUNCTION__);
+ 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)
+{
+ const char *ret = NULL;
+ struct lttng_userspace_probe_location_function *function_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) {
+ ERR("Invalid argument(s) passed to '%s'", __FUNCTION__);
+ goto end;
+ }
+
+ function_location = container_of(location,
+ struct lttng_userspace_probe_location_function, parent);
+ ret = function_location->function_name;
+end:
+ 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) passed to '%s'", __FUNCTION__);
+ 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) passed to '%s'", __FUNCTION__);
+ 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)
+{
+ int ret = -1;
+ struct lttng_userspace_probe_location_function *function_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) {
+ ERR("Invalid argument(s) passed to '%s'", __FUNCTION__);
+ goto end;
+ }
+
+ function_location = container_of(location,
+ struct lttng_userspace_probe_location_function, parent);
+ ret = function_location->binary_fd_handle ?
+ fd_handle_get_fd(function_location->binary_fd_handle) : -1;
+end:
+ return ret;
+}
+
+enum lttng_userspace_probe_location_function_instrumentation_type
+lttng_userspace_probe_location_function_get_instrumentation_type(
+ const struct lttng_userspace_probe_location *location)
+{
+ enum lttng_userspace_probe_location_function_instrumentation_type type;
+ struct lttng_userspace_probe_location_function *function_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) {
+ ERR("Invalid argument(s) passed to '%s'", __FUNCTION__);
+ type = LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_UNKNOWN;
+ goto end;
+ }
+
+ function_location = container_of(location,
+ struct lttng_userspace_probe_location_function, parent);
+ type = function_location->instrumentation_type;
+end:
+ return type;
+}
+
+enum lttng_userspace_probe_location_status
+lttng_userspace_probe_location_function_set_instrumentation_type(
+ const struct lttng_userspace_probe_location *location,
+ enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type)
+{
+ enum lttng_userspace_probe_location_status status =
+ LTTNG_USERSPACE_PROBE_LOCATION_STATUS_OK;
+ struct lttng_userspace_probe_location_function *function_location;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION ||
+ instrumentation_type !=
+ LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY) {
+ ERR("Invalid argument(s) passed to '%s'", __FUNCTION__);
+ status = LTTNG_USERSPACE_PROBE_LOCATION_STATUS_INVALID;
+ goto end;
+ }
+
+ function_location = container_of(location,
+ struct lttng_userspace_probe_location_function, parent);
+ function_location->instrumentation_type = instrumentation_type;
+end:
+ return status;
+}
+
+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) passed to '%s'", __FUNCTION__);
+ goto end;
+ }
+
+ tracepoint_location = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint, parent);
+ ret = tracepoint_location->binary_fd_handle ?
+ fd_handle_get_fd(tracepoint_location->binary_fd_handle) : -1;
+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)
+{
+ struct lttng_userspace_probe_location_lookup_method *ret = NULL;
+
+ if (!location || lttng_userspace_probe_location_get_type(location) !=
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) {
+ ERR("Invalid argument(s) passed to '%s'", __FUNCTION__);
+ goto end;
+ }
+
+ ret = location->lookup_method;
+end:
+ 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) passed to '%s'", __FUNCTION__);
+ goto end;
+ }
+
+ ret = location->lookup_method;
+end:
+ return ret;
+}
+
+const struct lttng_userspace_probe_location_lookup_method *
+lttng_userspace_probe_location_get_lookup_method(
+ const struct lttng_userspace_probe_location *location)
+{
+ struct lttng_userspace_probe_location_lookup_method *ret = NULL;
+
+ LTTNG_ASSERT(location);
+ switch (location->type) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
+ 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;
+ }
+ return ret;
+}
+
+static
+int lttng_userspace_probe_location_lookup_method_serialize(
+ struct lttng_userspace_probe_location_lookup_method *method,
+ struct lttng_payload *payload)
+{
+ int ret;
+ struct lttng_userspace_probe_location_lookup_method_comm
+ lookup_method_comm;
+
+ lookup_method_comm.type = (int8_t) (method ? method->type :
+ LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT);
+ if (payload) {
+ ret = lttng_dynamic_buffer_append(&payload->buffer, &lookup_method_comm,
+ sizeof(lookup_method_comm));
+ if (ret) {
+ goto end;
+ }
+ }
+ 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_payload *payload)
+{
+ 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;
+
+ LTTNG_ASSERT(location);
+ LTTNG_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 (payload && !location_function->binary_fd_handle) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ 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 (payload) {
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ &location_function_comm,
+ sizeof(location_function_comm));
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ location_function->function_name,
+ location_function_comm.function_name_len);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ location_function->binary_path,
+ location_function_comm.binary_path_len);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_payload_push_fd_handle(
+ payload, location_function->binary_fd_handle);
+ 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_tracepoint_serialize(
+ const struct lttng_userspace_probe_location *location,
+ struct lttng_payload *payload)
+{
+ int ret;
+ 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;
+
+ LTTNG_ASSERT(location);
+ LTTNG_ASSERT(lttng_userspace_probe_location_get_type(location) ==
+ LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT);
+
+ location_tracepoint = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint,
+ parent);
+ if (!location_tracepoint->probe_name ||
+ !location_tracepoint->provider_name ||
+ !location_tracepoint->binary_path) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (payload && !location_tracepoint->binary_fd_handle) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ probe_name_len = strlen(location_tracepoint->probe_name);
+ if (probe_name_len == 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ 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_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 (payload) {
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ &location_tracepoint_comm,
+ sizeof(location_tracepoint_comm));
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ location_tracepoint->probe_name,
+ location_tracepoint_comm.probe_name_len);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ location_tracepoint->provider_name,
+ location_tracepoint_comm.provider_name_len);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ location_tracepoint->binary_path,
+ location_tracepoint_comm.binary_path_len);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret = lttng_payload_push_fd_handle(
+ payload, location_tracepoint->binary_fd_handle);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ }
+
+ 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;
+}
+
+int lttng_userspace_probe_location_serialize(
+ const struct lttng_userspace_probe_location *location,
+ struct lttng_payload *payload)
+{
+ int ret, buffer_use = 0;
+ struct lttng_userspace_probe_location_comm location_generic_comm;
+
+ if (!location) {
+ ERR("Invalid argument(s) passed to '%s'", __FUNCTION__);
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ memset(&location_generic_comm, 0, sizeof(location_generic_comm));
+
+ location_generic_comm.type = (int8_t) location->type;
+ if (payload) {
+ ret = lttng_dynamic_buffer_append(&payload->buffer,
+ &location_generic_comm,
+ sizeof(location_generic_comm));
+ if (ret) {
+ goto end;
+ }
+ }
+ buffer_use += sizeof(location_generic_comm);
+
+ switch (lttng_userspace_probe_location_get_type(location)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
+ ret = lttng_userspace_probe_location_function_serialize(
+ location, payload);
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ ret = lttng_userspace_probe_location_tracepoint_serialize(
+ location, payload);
+ break;
+ default:
+ ERR("Unsupported probe location type");
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ if (ret < 0) {
+ goto end;
+ }
+ buffer_use += ret;
+
+ ret = lttng_userspace_probe_location_lookup_method_serialize(
+ location->lookup_method, payload);
+ if (ret < 0) {
+ goto end;
+ }
+ ret += buffer_use;
+end:
+ return ret;
+}
+
+static
+int lttng_userspace_probe_location_function_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_userspace_probe_location **location)
+{
+ struct lttng_userspace_probe_location_function_comm *location_function_comm;
+ const char *function_name_src, *binary_path_src;
+ char *function_name = NULL, *binary_path = NULL;
+ int ret = 0;
+ size_t expected_size;
+ struct fd_handle *binary_fd_handle = lttng_payload_view_pop_fd_handle(view);
+
+ LTTNG_ASSERT(location);
+
+ if (view->buffer.size < sizeof(*location_function_comm)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ location_function_comm =
+ (typeof(location_function_comm)) view->buffer.data;
+
+ expected_size = sizeof(*location_function_comm) +
+ location_function_comm->function_name_len +
+ location_function_comm->binary_path_len;
+
+ if (view->buffer.size < expected_size) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ function_name_src = view->buffer.data + sizeof(*location_function_comm);
+ binary_path_src = function_name_src +
+ location_function_comm->function_name_len;
+
+ if (!lttng_buffer_view_contains_string(&view->buffer, function_name_src,
+ location_function_comm->function_name_len)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (!lttng_buffer_view_contains_string(&view->buffer, binary_path_src,
+ location_function_comm->binary_path_len)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ function_name = lttng_strndup(function_name_src, LTTNG_SYMBOL_NAME_LEN);
+ if (!function_name) {
+ PERROR("lttng_strndup");
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX);
+ if (!binary_path) {
+ PERROR("lttng_strndup");
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ *location = lttng_userspace_probe_location_function_create_no_check(
+ binary_path, function_name, NULL, false);
+ if (!(*location)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ ret = lttng_userspace_probe_location_function_set_binary_fd_handle(
+ *location, binary_fd_handle);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ ret = (int) expected_size;
+end:
+ fd_handle_put(binary_fd_handle);
+ free(function_name);
+ free(binary_path);
+ return ret;
+}
+
+static
+int lttng_userspace_probe_location_tracepoint_create_from_payload(
+ struct lttng_payload_view *view,
+ 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;
+ size_t expected_size;
+ struct fd_handle *binary_fd_handle = lttng_payload_view_pop_fd_handle(view);
+
+ LTTNG_ASSERT(location);
+
+ if (!binary_fd_handle) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (view->buffer.size < sizeof(*location_tracepoint_comm)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ location_tracepoint_comm =
+ (typeof(location_tracepoint_comm)) view->buffer.data;
+
+ 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 (view->buffer.size < expected_size) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ probe_name_src = view->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 (!lttng_buffer_view_contains_string(&view->buffer, probe_name_src,
+ location_tracepoint_comm->probe_name_len)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (!lttng_buffer_view_contains_string(&view->buffer, provider_name_src,
+ location_tracepoint_comm->provider_name_len)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (!lttng_buffer_view_contains_string(&view->buffer, binary_path_src,
+ location_tracepoint_comm->binary_path_len)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN);
+ if (!probe_name) {
+ PERROR("Failed to allocate probe name");
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN);
+ if (!provider_name) {
+ PERROR("Failed to allocate provider name");
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX);
+ if (!binary_path) {
+ PERROR("Failed to allocate binary path");
+ ret = -LTTNG_ERR_INVALID;
+ 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 = lttng_userspace_probe_location_tracepoint_set_binary_fd_handle(
+ *location, binary_fd_handle);
+ if (ret) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ ret = (int) expected_size;
+end:
+ fd_handle_put(binary_fd_handle);
+ free(probe_name);
+ free(provider_name);
+ free(binary_path);
+ return ret;
+}
+
+static
+int lttng_userspace_probe_location_lookup_method_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_userspace_probe_location_lookup_method **lookup_method)
+{
+ int ret;
+ struct lttng_userspace_probe_location_lookup_method_comm *lookup_comm;
+ enum lttng_userspace_probe_location_lookup_method_type type;
+
+ LTTNG_ASSERT(view);
+ LTTNG_ASSERT(lookup_method);
+
+ if (view->buffer.size < sizeof(*lookup_comm)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ lookup_comm = (typeof(lookup_comm)) view->buffer.data;
+ type = (enum lttng_userspace_probe_location_lookup_method_type)
+ lookup_comm->type;
+ switch (type) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
+ *lookup_method = NULL;
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
+ *lookup_method =
+ lttng_userspace_probe_location_lookup_method_function_elf_create();
+ if (!(*lookup_method)) {
+ ret = -LTTNG_ERR_INVALID;
+ 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;
+ }
+
+ ret = sizeof(*lookup_comm);
+end:
+ return ret;
+}
+
+int lttng_userspace_probe_location_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_userspace_probe_location **location)
+{
+ struct lttng_userspace_probe_location_lookup_method *lookup_method;
+ enum lttng_userspace_probe_location_type type;
+ int consumed = 0;
+ int ret;
+ struct lttng_userspace_probe_location_comm *probe_location_comm;
+ struct lttng_payload_view probe_location_comm_view =
+ lttng_payload_view_from_view(
+ view, 0, sizeof(*probe_location_comm));
+
+ LTTNG_ASSERT(view);
+ LTTNG_ASSERT(location);
+
+ lookup_method = NULL;
+
+ if (!lttng_payload_view_is_valid(&probe_location_comm_view)) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ probe_location_comm = (typeof(probe_location_comm)) probe_location_comm_view.buffer.data;
+ type = (enum lttng_userspace_probe_location_type) probe_location_comm->type;
+ consumed += sizeof(*probe_location_comm);
+
+ switch (type) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
+ {
+ struct lttng_payload_view location_view =
+ lttng_payload_view_from_view(
+ view, consumed, -1);
+
+ ret = lttng_userspace_probe_location_function_create_from_payload(
+ &location_view, location);
+ if (ret < 0) {
+ goto end;
+ }
+ break;
+ }
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ {
+ struct lttng_payload_view location_view =
+ lttng_payload_view_from_view(view, consumed, -1);
+
+ ret = lttng_userspace_probe_location_tracepoint_create_from_payload(
+ &location_view, location);
+ if (ret < 0) {
+ goto end;
+ }
+ break;
+ }
+ default:
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ consumed += ret;
+ if (view->buffer.size <= consumed) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ {
+ struct lttng_payload_view lookup_method_view =
+ lttng_payload_view_from_view(
+ view, consumed, -1);
+
+ ret = lttng_userspace_probe_location_lookup_method_create_from_payload(
+ &lookup_method_view, &lookup_method);
+ }
+ if (ret < 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ LTTNG_ASSERT(lookup_method);
+ (*location)->lookup_method = lookup_method;
+ lookup_method = NULL;
+ ret += consumed;
+end:
+ return ret;
+}
+
+static
+int lttng_userspace_probe_location_function_set_binary_fd_handle(
+ struct lttng_userspace_probe_location *location,
+ struct fd_handle *binary_fd)
+{
+ int ret = 0;
+ struct lttng_userspace_probe_location_function *function_location;
+
+ LTTNG_ASSERT(location);
+ LTTNG_ASSERT(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION);
+
+ function_location = container_of(location,
+ struct lttng_userspace_probe_location_function, parent);
+ fd_handle_put(function_location->binary_fd_handle);
+ fd_handle_get(binary_fd);
+ function_location->binary_fd_handle = binary_fd;
+ return ret;
+}
+
+static
+int lttng_userspace_probe_location_tracepoint_set_binary_fd_handle(
+ struct lttng_userspace_probe_location *location,
+ struct fd_handle *binary_fd)
+{
+ int ret = 0;
+ struct lttng_userspace_probe_location_tracepoint *tracepoint_location;
+
+ LTTNG_ASSERT(location);
+ LTTNG_ASSERT(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT);
+
+ tracepoint_location = container_of(location,
+ struct lttng_userspace_probe_location_tracepoint, parent);
+ fd_handle_put(tracepoint_location->binary_fd_handle);
+ fd_handle_get(binary_fd);
+ tracepoint_location->binary_fd_handle = binary_fd;
+ return ret;
+}
+
+static
+int lttng_userspace_probe_location_function_flatten(
+ const struct lttng_userspace_probe_location *location,
+ struct lttng_dynamic_buffer *buffer)
+{
+ struct lttng_userspace_probe_location_lookup_method_elf flat_lookup_method;
+ struct lttng_userspace_probe_location_function *probe_function;
+ struct lttng_userspace_probe_location_function flat_probe;
+ size_t function_name_len, binary_path_len;
+ size_t padding_needed = 0;
+ char *flat_probe_start;
+ int storage_needed = 0;
+ int ret;
+
+ LTTNG_ASSERT(location);
+
+ if (location->lookup_method && location->lookup_method->type !=
+ LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ probe_function = container_of(location,
+ struct lttng_userspace_probe_location_function,
+ parent);
+ LTTNG_ASSERT(probe_function->function_name);
+ LTTNG_ASSERT(probe_function->binary_path);
+
+ storage_needed +=
+ sizeof(struct lttng_userspace_probe_location_function);
+ function_name_len = strlen(probe_function->function_name) + 1;
+ binary_path_len = strlen(probe_function->binary_path) + 1;
+ storage_needed += function_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 = lttng_align_ceil(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 (!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) +
+ function_name_len + binary_path_len + padding_needed);
+ } else {
+ flat_probe.parent.lookup_method = NULL;
+ }
+
+ flat_probe.function_name = flat_probe_start + sizeof(flat_probe);
+ flat_probe.binary_path = flat_probe.function_name + function_name_len;
+ flat_probe.binary_fd_handle = NULL;
+ ret = lttng_dynamic_buffer_append(buffer, &flat_probe,
+ sizeof(flat_probe));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(buffer,
+ probe_function->function_name, function_name_len);
+ if (ret) {
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(buffer,
+ probe_function->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_FUNCTION_ELF;
+ ret = lttng_dynamic_buffer_append(buffer,
+ &flat_lookup_method, sizeof(flat_lookup_method));
+ if (ret) {
+ goto end;
+ }
+ ret = storage_needed;
+end:
+ 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;
+
+ LTTNG_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);
+ LTTNG_ASSERT(probe_tracepoint->probe_name);
+ LTTNG_ASSERT(probe_tracepoint->provider_name);
+ LTTNG_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 = lttng_align_ceil(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_handle = NULL;
+ 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;
+}
+
+int lttng_userspace_probe_location_flatten(
+ const struct lttng_userspace_probe_location *location,
+ struct lttng_dynamic_buffer *buffer)
+{
+ int ret;
+ if (!location) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ /* Only types currently supported. */
+ switch (location->type) {
+ 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;
+ }
+
+end:
+ return ret;
+}
+
+struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy(
+ const struct lttng_userspace_probe_location *location)
+{
+ struct lttng_userspace_probe_location *new_location = NULL;
+ enum lttng_userspace_probe_location_type type;
+
+ if (!location) {
+ goto err;
+ }
+
+ type = lttng_userspace_probe_location_get_type(location);
+ switch (type) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
+ new_location =
+ lttng_userspace_probe_location_function_copy(location);
+ if (!new_location) {
+ 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;
+ }
+err:
+ return new_location;
+}
+
+bool lttng_userspace_probe_location_lookup_method_is_equal(
+ const struct lttng_userspace_probe_location_lookup_method *a,
+ const struct lttng_userspace_probe_location_lookup_method *b)
+{
+ bool is_equal = false;
+
+ if (!a || !b) {
+ goto end;
+ }
+
+ if (a == b) {
+ is_equal = true;
+ goto end;
+ }
+
+ if (a->type != b->type) {
+ goto end;
+ }
+
+ is_equal = true;
+end:
+ return is_equal;
+}
+
+bool lttng_userspace_probe_location_is_equal(
+ const struct lttng_userspace_probe_location *a,
+ const struct lttng_userspace_probe_location *b)
+{
+ bool is_equal = false;
+
+ if (!a || !b) {
+ goto end;
+ }
+
+ if (a == b) {
+ is_equal = true;
+ goto end;
+ }
+
+ if (!lttng_userspace_probe_location_lookup_method_is_equal(
+ a->lookup_method, b->lookup_method)) {
+ goto end;
+ }
+
+ if (a->type != b->type) {
+ goto end;
+ }
+
+ is_equal = a->equal ? a->equal(a, b) : true;
+end:
+ return is_equal;
+}
+
+unsigned long lttng_userspace_probe_location_hash(
+ const struct lttng_userspace_probe_location *location)
+{
+ return location->hash(location);
+}
+
+enum lttng_error_code lttng_userspace_probe_location_mi_serialize(
+ const struct lttng_userspace_probe_location *location,
+ struct mi_writer *writer)
+{
+ typedef enum lttng_error_code (*mi_fp)(
+ const struct lttng_userspace_probe_location *,
+ struct mi_writer *);
+
+ int ret;
+ enum lttng_error_code ret_code;
+ mi_fp mi_function = NULL;
+
+ LTTNG_ASSERT(location);
+ LTTNG_ASSERT(writer);
+
+ switch (lttng_userspace_probe_location_get_type(location)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
+ mi_function = lttng_userspace_probe_location_function_mi_serialize;
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
+ mi_function = lttng_userspace_probe_location_tracepoint_mi_serialize;
+ break;
+ default:
+ abort();
+ break;
+ }
+
+ /* Open userspace probe location element. */
+ ret = mi_lttng_writer_open_element(
+ writer, mi_lttng_element_userspace_probe_location);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Underlying user space probe location. */
+ ret_code = mi_function(location, writer);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+
+ /* Close userspace probe location element. */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto mi_error;
+ }
+
+ ret_code = LTTNG_OK;
+ goto end;
+
+mi_error:
+ ret_code = LTTNG_ERR_MI_IO_FAIL;
+end:
+ return ret_code;
+}
+
+enum lttng_error_code lttng_userspace_probe_location_lookup_method_mi_serialize(
+ const struct lttng_userspace_probe_location_lookup_method
+ *method,
+ struct mi_writer *writer)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ const char *type_element_str;
+
+ LTTNG_ASSERT(method);
+ LTTNG_ASSERT(writer);
+
+ switch (lttng_userspace_probe_location_lookup_method_get_type(method)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
+ type_element_str =
+ mi_lttng_element_userspace_probe_location_lookup_method_function_default;
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
+ type_element_str =
+ mi_lttng_element_userspace_probe_location_lookup_method_function_elf;
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ type_element_str =
+ mi_lttng_element_userspace_probe_location_lookup_method_tracepoint_sdt;
+ break;
+ default:
+ abort();
+ break;
+ }
+
+ /* Open userspace probe location lookup method element. */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_userspace_probe_location_lookup_method);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* User space probe location lookup method empty element. */
+ ret = mi_lttng_writer_open_element(writer, type_element_str);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Close userspace probe location lookup method element. */
+ ret = mi_lttng_close_multi_element(writer, 2);
+ if (ret) {
+ goto mi_error;
+ }
+
+ ret_code = LTTNG_OK;
+ goto end;
+
+mi_error:
+ ret_code = LTTNG_ERR_MI_IO_FAIL;
+end:
+ return ret_code;
+}
+
+static enum lttng_error_code lttng_userspace_probe_location_tracepoint_mi_serialize(
+ const struct lttng_userspace_probe_location *location,
+ struct mi_writer *writer)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ const char *probe_name = NULL;
+ const char *provider_name = NULL;
+ const char *binary_path = NULL;
+ const struct lttng_userspace_probe_location_lookup_method
+ *lookup_method = NULL;
+
+ LTTNG_ASSERT(location);
+ LTTNG_ASSERT(writer);
+
+ probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(
+ location);
+ provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(
+ location);
+ binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(
+ location);
+ lookup_method = lttng_userspace_probe_location_tracepoint_get_lookup_method(
+ location);
+
+ /* Open userspace probe location tracepoint element. */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_userspace_probe_location_tracepoint);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Probe name. */
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_userspace_probe_location_tracepoint_probe_name,
+ probe_name);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Provider name. */
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_userspace_probe_location_tracepoint_provider_name,
+ provider_name);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Binary path. */
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_userspace_probe_location_binary_path,
+ binary_path);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* The lookup method. */
+ ret_code = lttng_userspace_probe_location_lookup_method_mi_serialize(
+ lookup_method, writer);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+
+ /* Close userspace probe location tracepoint. */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto mi_error;
+ }
+
+ ret_code = LTTNG_OK;
+ goto end;
+
+mi_error:
+ ret_code = LTTNG_ERR_MI_IO_FAIL;
+end:
+ return ret_code;
+}
+
+static enum lttng_error_code lttng_userspace_probe_location_function_mi_serialize(
+ const struct lttng_userspace_probe_location *location,
+ struct mi_writer *writer)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ const char *function_name = NULL;
+ const char *binary_path = NULL;
+ const char *instrumentation_type_str = NULL;
+ enum lttng_userspace_probe_location_function_instrumentation_type
+ instrumentation_type;
+ const struct lttng_userspace_probe_location_lookup_method
+ *lookup_method = NULL;
+
+ LTTNG_ASSERT(location);
+ LTTNG_ASSERT(writer);
+
+ function_name = lttng_userspace_probe_location_function_get_function_name(
+ location);
+ binary_path = lttng_userspace_probe_location_function_get_binary_path(
+ location);
+ instrumentation_type =
+ lttng_userspace_probe_location_function_get_instrumentation_type(
+ location);
+ lookup_method = lttng_userspace_probe_location_function_get_lookup_method(
+ location);
+
+ switch (instrumentation_type) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY:
+ instrumentation_type_str =
+ mi_lttng_userspace_probe_location_function_instrumentation_type_entry;
+ break;
+ default:
+ abort();
+ break;
+ }
+
+ /* Open userspace probe location function element. */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_userspace_probe_location_function);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Function name. */
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_userspace_probe_location_function_name,
+ function_name);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Binary path. */
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_userspace_probe_location_binary_path,
+ binary_path);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Instrumentation type. */
+ ret = mi_lttng_writer_write_element_string(writer,
+ mi_lttng_element_userspace_probe_location_function_instrumentation_type,
+ instrumentation_type_str);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* The lookup method. */
+ ret_code = lttng_userspace_probe_location_lookup_method_mi_serialize(
+ lookup_method, writer);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+
+ /* Close userspace probe location function element. */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto mi_error;
+ }
+
+ ret_code = LTTNG_OK;
+ goto end;
+
+mi_error:
+ ret_code = LTTNG_ERR_MI_IO_FAIL;
+end:
+ return ret_code;
+}
projects / lttng-tools.git / blobdiff