X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconfig%2Fsession-config.c;h=c2ae5e1201fb0cf0b4ef51c438ee74d48fe6d86f;hp=804b77818d269cd5af82e5d1807d2f5545ccb696;hb=499cbfa121fa1bc9ea78294f26b274b35fbc5e0a;hpb=91744e14248d52e0a696df7d94024dce79fdd665 diff --git a/src/common/config/session-config.c b/src/common/config/session-config.c index 804b77818..c2ae5e120 100644 --- a/src/common/config/session-config.c +++ b/src/common/config/session-config.c @@ -42,10 +42,13 @@ #include #include #include +#include #include "session-config.h" #include "config-internal.h" +#define CONFIG_USERSPACE_PROBE_LOOKUP_METHOD_NAME_MAX_LEN 7 + struct handler_filter_args { const char* section; config_entry_handler_cb handler; @@ -86,6 +89,18 @@ const char * const config_element_probe_attributes = "probe_attributes"; const char * const config_element_symbol_name = "symbol_name"; const char * const config_element_address = "address"; const char * const config_element_offset = "offset"; + +LTTNG_HIDDEN const char * const config_element_userspace_probe_lookup = "lookup_method"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_lookup_function_default = "DEFAULT"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_lookup_function_elf = "ELF"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_lookup_tracepoint_sdt = "SDT"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_location_binary_path = "binary_path"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_function_attributes = "userspace_probe_function_attributes"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_function_location_function_name = "function_name"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_tracepoint_attributes = "userspace_probe_tracepoint_attributes"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_tracepoint_location_provider_name = "provider_name"; +LTTNG_HIDDEN const char * const config_element_userspace_probe_tracepoint_location_probe_name = "probe_name"; + const char * const config_element_name = "name"; const char * const config_element_enabled = "enabled"; const char * const config_element_overwrite_mode = "overwrite_mode"; @@ -162,6 +177,7 @@ const char * const config_loglevel_type_single = "SINGLE"; const char * const config_event_type_all = "ALL"; const char * const config_event_type_tracepoint = "TRACEPOINT"; const char * const config_event_type_probe = "PROBE"; +LTTNG_HIDDEN const char * const config_event_type_userspace_probe = "USERSPACE_PROBE"; const char * const config_event_type_function = "FUNCTION"; const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; const char * const config_event_type_noop = "NOOP"; @@ -189,6 +205,25 @@ LTTNG_HIDDEN const char * const config_event_context_need_reschedule = "NEED_RES LTTNG_HIDDEN const char * const config_event_context_migratable = "MIGRATABLE"; LTTNG_HIDDEN const char * const config_event_context_callstack_user= "CALLSTACK_USER"; LTTNG_HIDDEN const char * const config_event_context_callstack_kernel = "CALLSTACK_KERNEL"; +LTTNG_HIDDEN const char * const config_event_context_cgroup_ns = "CGROUP_NS"; +LTTNG_HIDDEN const char * const config_event_context_ipc_ns = "IPC_NS"; +LTTNG_HIDDEN const char * const config_event_context_mnt_ns = "MNT_NS"; +LTTNG_HIDDEN const char * const config_event_context_net_ns = "NET_NS"; +LTTNG_HIDDEN const char * const config_event_context_pid_ns = "PID_NS"; +LTTNG_HIDDEN const char * const config_event_context_user_ns = "USER_NS"; +LTTNG_HIDDEN const char * const config_event_context_uts_ns = "UTS_NS"; +LTTNG_HIDDEN const char * const config_event_context_uid = "UID"; +LTTNG_HIDDEN const char * const config_event_context_euid = "EUID"; +LTTNG_HIDDEN const char * const config_event_context_suid = "SUID"; +LTTNG_HIDDEN const char * const config_event_context_gid = "GID"; +LTTNG_HIDDEN const char * const config_event_context_egid = "EGID"; +LTTNG_HIDDEN const char * const config_event_context_sgid = "SGID"; +LTTNG_HIDDEN const char * const config_event_context_vuid = "VUID"; +LTTNG_HIDDEN const char * const config_event_context_veuid = "VEUID"; +LTTNG_HIDDEN const char * const config_event_context_vsuid = "VSUID"; +LTTNG_HIDDEN const char * const config_event_context_vgid = "VGID"; +LTTNG_HIDDEN const char * const config_event_context_vegid = "VEGID"; +LTTNG_HIDDEN const char * const config_event_context_vsgid = "VSGID"; /* Deprecated symbols */ const char * const config_element_perf; @@ -234,7 +269,7 @@ int config_get_section_entries(const char *override_path, const char *section, config_entry_handler_cb handler, void *user_data) { int ret = 0; - char *path; + const char *path; FILE *config_file = NULL; struct handler_filter_args filter = { section, handler, user_data }; @@ -919,10 +954,13 @@ int get_event_type(xmlChar *event_type) ret = LTTNG_EVENT_TRACEPOINT; } else if (!strcmp((char *) event_type, config_event_type_probe)) { ret = LTTNG_EVENT_PROBE; + } else if (!strcmp((char *) event_type, + config_event_type_userspace_probe)) { + ret = LTTNG_EVENT_USERSPACE_PROBE; } else if (!strcmp((char *) event_type, config_event_type_function)) { ret = LTTNG_EVENT_FUNCTION; } else if (!strcmp((char *) event_type, - config_event_type_function_entry)) { + config_event_type_function_entry)) { ret = LTTNG_EVENT_FUNCTION_ENTRY; } else if (!strcmp((char *) event_type, config_event_type_noop)) { ret = LTTNG_EVENT_NOOP; @@ -1028,6 +1066,63 @@ int get_context_type(xmlChar *context_type) } else if (!strcmp((char *) context_type, config_event_context_callstack_kernel)) { ret = LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL; + } else if (!strcmp((char *) context_type, + config_event_context_cgroup_ns)) { + ret = LTTNG_EVENT_CONTEXT_CGROUP_NS; + } else if (!strcmp((char *) context_type, + config_event_context_ipc_ns)) { + ret = LTTNG_EVENT_CONTEXT_IPC_NS; + } else if (!strcmp((char *) context_type, + config_event_context_mnt_ns)) { + ret = LTTNG_EVENT_CONTEXT_MNT_NS; + } else if (!strcmp((char *) context_type, + config_event_context_net_ns)) { + ret = LTTNG_EVENT_CONTEXT_NET_NS; + } else if (!strcmp((char *) context_type, + config_event_context_pid_ns)) { + ret = LTTNG_EVENT_CONTEXT_PID_NS; + } else if (!strcmp((char *) context_type, + config_event_context_user_ns)) { + ret = LTTNG_EVENT_CONTEXT_USER_NS; + } else if (!strcmp((char *) context_type, + config_event_context_uts_ns)) { + ret = LTTNG_EVENT_CONTEXT_UTS_NS; + } else if (!strcmp((char *) context_type, + config_event_context_uid)) { + ret = LTTNG_EVENT_CONTEXT_UID; + } else if (!strcmp((char *) context_type, + config_event_context_euid)) { + ret = LTTNG_EVENT_CONTEXT_EUID; + } else if (!strcmp((char *) context_type, + config_event_context_suid)) { + ret = LTTNG_EVENT_CONTEXT_SUID; + } else if (!strcmp((char *) context_type, + config_event_context_gid)) { + ret = LTTNG_EVENT_CONTEXT_GID; + } else if (!strcmp((char *) context_type, + config_event_context_egid)) { + ret = LTTNG_EVENT_CONTEXT_EGID; + } else if (!strcmp((char *) context_type, + config_event_context_sgid)) { + ret = LTTNG_EVENT_CONTEXT_SGID; + } else if (!strcmp((char *) context_type, + config_event_context_vuid)) { + ret = LTTNG_EVENT_CONTEXT_VUID; + } else if (!strcmp((char *) context_type, + config_event_context_veuid)) { + ret = LTTNG_EVENT_CONTEXT_VEUID; + } else if (!strcmp((char *) context_type, + config_event_context_vsuid)) { + ret = LTTNG_EVENT_CONTEXT_VSUID; + } else if (!strcmp((char *) context_type, + config_event_context_vgid)) { + ret = LTTNG_EVENT_CONTEXT_VGID; + } else if (!strcmp((char *) context_type, + config_event_context_vegid)) { + ret = LTTNG_EVENT_CONTEXT_VEGID; + } else if (!strcmp((char *) context_type, + config_event_context_vsgid)) { + ret = LTTNG_EVENT_CONTEXT_VSGID; } else { goto error; } @@ -1454,6 +1549,178 @@ end: free(output.data_uri); return ret; } + +static +struct lttng_userspace_probe_location * +process_userspace_probe_function_attribute_node( + xmlNodePtr attribute_node) +{ + xmlNodePtr function_attribute_node; + char *function_name = NULL, *binary_path = NULL; + struct lttng_userspace_probe_location *location = NULL; + struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; + + /* + * Process userspace probe location function attributes. The order of + * the fields are not guaranteed so we need to iterate over all fields + * and check at the end if everything we need for this location type is + * there. + */ + for (function_attribute_node = + xmlFirstElementChild(attribute_node); + function_attribute_node; + function_attribute_node = xmlNextElementSibling( + function_attribute_node)) { + /* Handle function name, binary path and lookup method. */ + if (!strcmp((const char *) function_attribute_node->name, + config_element_userspace_probe_function_location_function_name)) { + function_name = (char *) xmlNodeGetContent(function_attribute_node); + if (!function_name) { + goto error; + } + } else if (!strcmp((const char *) function_attribute_node->name, + config_element_userspace_probe_location_binary_path)) { + binary_path = (char *) xmlNodeGetContent(function_attribute_node); + if (!binary_path) { + goto error; + } + } else if (!strcmp((const char *) function_attribute_node->name, + config_element_userspace_probe_lookup)) { + char *lookup_method_name; + + lookup_method_name = (char *) xmlNodeGetContent( + function_attribute_node); + if (!lookup_method_name) { + goto error; + } + + /* + * function_default lookup method defaults to + * function_elf lookup method at the moment. + */ + if (!strcmp(lookup_method_name, config_element_userspace_probe_lookup_function_elf) + || !strcmp(lookup_method_name, config_element_userspace_probe_lookup_function_default)) { + lookup_method = lttng_userspace_probe_location_lookup_method_function_elf_create(); + if (!lookup_method) { + PERROR("Error creating function default/ELF lookup method"); + } + } else { + WARN("Unknown function lookup method"); + } + + free(lookup_method_name); + if (!lookup_method) { + goto error; + } + } else { + goto error; + } + + /* Check if all the necessary fields were found. */ + if (binary_path && function_name && lookup_method) { + /* Ownership of lookup_method is transferred. */ + location = + lttng_userspace_probe_location_function_create( + binary_path, function_name, + lookup_method); + lookup_method = NULL; + goto error; + } + } +error: + lttng_userspace_probe_location_lookup_method_destroy(lookup_method); + free(binary_path); + free(function_name); + return location; +} + +static +struct lttng_userspace_probe_location * +process_userspace_probe_tracepoint_attribute_node( + xmlNodePtr attribute_node) +{ + xmlNodePtr tracepoint_attribute_node; + char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; + struct lttng_userspace_probe_location *location = NULL; + struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; + + /* + * Process userspace probe location tracepoint attributes. The order of + * the fields are not guaranteed so we need to iterate over all fields + * and check at the end if everything we need for this location type is + * there. + */ + for (tracepoint_attribute_node = + xmlFirstElementChild(attribute_node); tracepoint_attribute_node; + tracepoint_attribute_node = xmlNextElementSibling( + tracepoint_attribute_node)) { + if (!strcmp((const char *) tracepoint_attribute_node->name, + config_element_userspace_probe_tracepoint_location_probe_name)) { + probe_name = (char *) xmlNodeGetContent(tracepoint_attribute_node); + if (!probe_name) { + goto error; + } + } else if (!strcmp((const char *) tracepoint_attribute_node->name, + config_element_userspace_probe_tracepoint_location_provider_name)) { + provider_name = (char *) xmlNodeGetContent(tracepoint_attribute_node); + if (!provider_name) { + goto error; + } + } else if (!strcmp((const char *) tracepoint_attribute_node->name, + config_element_userspace_probe_location_binary_path)) { + binary_path = (char *) xmlNodeGetContent(tracepoint_attribute_node); + if (!binary_path) { + goto error; + } + } else if (!strcmp((const char *) tracepoint_attribute_node->name, + config_element_userspace_probe_lookup)) { + char *lookup_method_name; + + lookup_method_name = (char *) xmlNodeGetContent( + tracepoint_attribute_node); + if (!lookup_method_name) { + goto error; + } + + if (!strcmp(lookup_method_name, + config_element_userspace_probe_lookup_tracepoint_sdt)) { + lookup_method = + lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); + if (!lookup_method) { + PERROR("Error creating tracepoint SDT lookup method"); + } + } else { + WARN("Unknown tracepoint lookup method"); + } + + free(lookup_method_name); + if (!lookup_method) { + goto error; + } + } else { + WARN("Unknown tracepoint attribute"); + goto error; + } + + /* Check if all the necessary fields were found. */ + if (binary_path && provider_name && probe_name && lookup_method) { + /* Ownership of lookup_method is transferred. */ + location = + lttng_userspace_probe_location_tracepoint_create( + binary_path, provider_name, + probe_name, lookup_method); + lookup_method = NULL; + goto error; + } + } +error: + lttng_userspace_probe_location_lookup_method_destroy(lookup_method); + free(binary_path); + free(provider_name); + free(probe_name); + return location; +} + static int process_probe_attribute_node(xmlNodePtr probe_attribute_node, struct lttng_event_probe_attr *attr) @@ -1752,7 +2019,7 @@ int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, goto end; } - if (!strcmp((const char *) node->name, + if (!strcmp((const char *) attribute_node->name, config_element_probe_attributes)) { xmlNodePtr probe_attribute_node; @@ -1768,7 +2035,8 @@ int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, goto end; } } - } else { + } else if (!strcmp((const char *) attribute_node->name, + config_element_function_attributes)) { size_t sym_len; xmlChar *content; xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); @@ -1797,6 +2065,51 @@ int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, goto end; } free(content); + } else if (!strcmp((const char *) attribute_node->name, + config_element_userspace_probe_tracepoint_attributes)) { + struct lttng_userspace_probe_location *location; + + location = process_userspace_probe_tracepoint_attribute_node(attribute_node); + if (!location) { + WARN("Error processing userspace probe tracepoint attribute"); + ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; + goto end; + } + ret = lttng_event_set_userspace_probe_location( + event, location); + if (ret) { + WARN("Error setting userspace probe location field"); + lttng_userspace_probe_location_destroy( + location); + ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; + goto end; + } + } else if (!strcmp((const char *) attribute_node->name, + config_element_userspace_probe_function_attributes)) { + struct lttng_userspace_probe_location *location; + + location = + process_userspace_probe_function_attribute_node( + attribute_node); + if (!location) { + WARN("Error processing userspace probe function attribute"); + ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; + goto end; + } + + ret = lttng_event_set_userspace_probe_location( + event, location); + if (ret) { + WARN("Error setting userspace probe location field"); + lttng_userspace_probe_location_destroy( + location); + ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; + goto end; + } + } else { + /* Unknown event attribute. */ + ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; + goto end; } } } @@ -1816,6 +2129,7 @@ end: free(exclusions[i]); } + lttng_event_destroy(event); free(exclusions); free(filter_expression); return ret; @@ -3294,7 +3608,7 @@ int config_load_session(const char *path, const char *session_name, } if (!path) { - char *home_path; + const char *home_path; const char *sys_path; /* Try home path */