From 08662c9bc42734d841537b67e55cc9dca505ec22 Mon Sep 17 00:00:00 2001 From: Jonathan Rajotte Date: Wed, 12 May 2021 01:01:19 -0400 Subject: [PATCH] Introduce lttng_event_rule_log4j_logging MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit A following patch will remove lttng_event_rule_tracepoint. Signed-off-by: Jonathan Rajotte Signed-off-by: Jérémie Galarneau Change-Id: Ie94c172ed9550dd7c3ae9967e353a3d6ac5b5907 --- include/Makefile.am | 2 + include/lttng/event-rule/event-rule.h | 1 + .../lttng/event-rule/log4j-logging-internal.h | 59 ++ include/lttng/event-rule/log4j-logging.h | 114 +++ include/lttng/lttng.h | 1 + src/common/Makefile.am | 1 + src/common/event-rule/event-rule.c | 10 + src/common/event-rule/log4j-logging.c | 845 ++++++++++++++++++ tests/unit/test_event_rule.c | 68 +- 9 files changed, 1100 insertions(+), 1 deletion(-) create mode 100644 include/lttng/event-rule/log4j-logging-internal.h create mode 100644 include/lttng/event-rule/log4j-logging.h create mode 100644 src/common/event-rule/log4j-logging.c diff --git a/include/Makefile.am b/include/Makefile.am index 05ec82872..0b0dabd3d 100644 --- a/include/Makefile.am +++ b/include/Makefile.am @@ -158,6 +158,7 @@ lttngeventruleinclude_HEADERS= \ lttng/event-rule/tracepoint.h \ lttng/event-rule/kernel-tracepoint.h \ lttng/event-rule/kernel-uprobe.h \ + lttng/event-rule/log4j-logging.h \ lttng/event-rule/user-tracepoint.h noinst_HEADERS = \ @@ -190,6 +191,7 @@ noinst_HEADERS = \ lttng/event-rule/tracepoint-internal.h \ lttng/event-rule/kernel-tracepoint-internal.h \ lttng/event-rule/kernel-uprobe-internal.h \ + lttng/event-rule/log4j-logging-internal.h \ lttng/event-rule/user-tracepoint-internal.h \ lttng/health-internal.h \ lttng/kernel-probe-internal.h \ diff --git a/include/lttng/event-rule/event-rule.h b/include/lttng/event-rule/event-rule.h index d403608ea..11baac94b 100644 --- a/include/lttng/event-rule/event-rule.h +++ b/include/lttng/event-rule/event-rule.h @@ -24,6 +24,7 @@ enum lttng_event_rule_type { LTTNG_EVENT_RULE_TYPE_KERNEL_UPROBE = 5, LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT = 6, LTTNG_EVENT_RULE_TYPE_JUL_LOGGING = 7, + LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING = 8, }; enum lttng_event_rule_status { diff --git a/include/lttng/event-rule/log4j-logging-internal.h b/include/lttng/event-rule/log4j-logging-internal.h new file mode 100644 index 000000000..14a662f68 --- /dev/null +++ b/include/lttng/event-rule/log4j-logging-internal.h @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2021 Jonathan Rajotte + * + * SPDX-License-Identifier: LGPL-2.1-only + * + */ + +#ifndef LTTNG_EVENT_RULE_LOG4J_LOGGING_INTERNAL_H +#define LTTNG_EVENT_RULE_LOG4J_LOGGING_INTERNAL_H + +#include +#include +#include +#include +#include +#include +#include + +struct lttng_event_rule_log4j_logging { + struct lttng_event_rule parent; + + /* Name pattern. */ + char *pattern; + + /* Filter. */ + char *filter_expression; + + /* Log level. */ + struct lttng_log_level_rule *log_level_rule; + + /* internal use only. */ + struct { + char *filter; + struct lttng_bytecode *bytecode; + } internal_filter; +}; + +struct lttng_event_rule_log4j_logging_comm { + /* Includes terminator `\0`. */ + uint32_t pattern_len; + /* Includes terminator `\0`. */ + uint32_t filter_expression_len; + /* enum lttng_log_level_rule_comm + payload if any */ + uint32_t log_level_rule_len; + /* + * Payload is composed of, in that order: + * - pattern (null terminated), + * - filter expression (null terminated), + * - log level rule serialized object, + */ + char payload[]; +} LTTNG_PACKED; + +LTTNG_HIDDEN +ssize_t lttng_event_rule_log4j_logging_create_from_payload( + struct lttng_payload_view *view, + struct lttng_event_rule **rule); + +#endif /* LTTNG_EVENT_RULE_LOG4J_LOGGING_INTERNAL_H */ diff --git a/include/lttng/event-rule/log4j-logging.h b/include/lttng/event-rule/log4j-logging.h new file mode 100644 index 000000000..1514a06f0 --- /dev/null +++ b/include/lttng/event-rule/log4j-logging.h @@ -0,0 +1,114 @@ +/* + * Copyright (C) 2021 Jonathan Rajotte + * + * SPDX-License-Identifier: LGPL-2.1-only + * + */ + +#ifndef LTTNG_EVENT_RULE_LOG4J_LOGGING_H +#define LTTNG_EVENT_RULE_LOG4J_LOGGING_H + +#include +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Create a newly allocated log4j logging event rule. + * + * The default name pattern is '*'. + * + * Returns a new event rule on success, NULL on failure. This event rule must be + * destroyed using lttng_event_rule_destroy(). + */ +extern struct lttng_event_rule *lttng_event_rule_log4j_logging_create(void); + +/* + * Set the name pattern of a log4j logging event rule. + * + * Pattern can contain wildcard '*'. See man lttng-enable-event. + * + * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID + * if invalid parameters are passed. + */ +extern enum lttng_event_rule_status lttng_event_rule_log4j_logging_set_name_pattern( + struct lttng_event_rule *rule, const char *pattern); + +/* + * Get the name pattern of a log4j logging event rule. + * + * The caller does not assume the ownership of the returned pattern. The + * pattern shall only only be used for the duration of the event rule's + * lifetime, or before a different pattern is set. + * + * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's pattern + * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid + * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a pattern + * was not set prior to this call. + */ +extern enum lttng_event_rule_status lttng_event_rule_log4j_logging_get_name_pattern( + const struct lttng_event_rule *rule, const char **pattern); + +/* + * Set the filter expression of a log4j logging event rule. + * + * The expression is copied internally. + * + * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID + * if invalid parameters are passed. + */ +extern enum lttng_event_rule_status lttng_event_rule_log4j_logging_set_filter( + struct lttng_event_rule *rule, const char *expression); + +/* + * Get the filter expression of a log4j logging event rule. + * + * The caller does not assume the ownership of the returned filter expression. + * The filter expression shall only only be used for the duration of the event + * rule's lifetime, or before a different filter expression is set. + * + * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's filter + * expression on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid + * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a filter expression + * was not set prior to this call. + */ +extern enum lttng_event_rule_status lttng_event_rule_log4j_logging_get_filter( + const struct lttng_event_rule *rule, const char **expression); + +/* + * Set the log level rule of a log4j logging event rule. + * + * The log level rule is copied internally. + * + * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID + * if invalid parameters are passed. + */ +extern enum lttng_event_rule_status +lttng_event_rule_log4j_logging_set_log_level_rule(struct lttng_event_rule *rule, + const struct lttng_log_level_rule *log_level_rule); + +/* + * Get the log level rule of a log4j logging event rule. + * + * The caller does not assume the ownership of the returned log level rule. The + * log level rule shall only only be used for the duration of the event rule's + * lifetime, or before a different log level rule is set. + * + * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the log level rule output + * parameter on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter + * is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a log level rule was not set prior + * to this call. + */ +extern enum lttng_event_rule_status +lttng_event_rule_log4j_logging_get_log_level_rule( + const struct lttng_event_rule *rule, + const struct lttng_log_level_rule **log_level_rule); + +#ifdef __cplusplus +} +#endif + +#endif /* LTTNG_EVENT_RULE_LOG4J_LOGGING_H */ diff --git a/include/lttng/lttng.h b/include/lttng/lttng.h index a849d6b53..22e7752a9 100644 --- a/include/lttng/lttng.h +++ b/include/lttng/lttng.h @@ -42,6 +42,7 @@ #include #include #include +#include #include #include #include diff --git a/src/common/Makefile.am b/src/common/Makefile.am index b07ac04a1..cf4801d56 100644 --- a/src/common/Makefile.am +++ b/src/common/Makefile.am @@ -71,6 +71,7 @@ libcommon_la_SOURCES = \ event-rule/tracepoint.c \ event-rule/kernel-tracepoint.c \ event-rule/user-tracepoint.c \ + event-rule/log4j-logging.c \ event-rule/jul-logging.c \ filter.c filter.h \ fd-handle.c fd-handle.h \ diff --git a/src/common/event-rule/event-rule.c b/src/common/event-rule/event-rule.c index 8c68d62b8..5bfed7e30 100644 --- a/src/common/event-rule/event-rule.c +++ b/src/common/event-rule/event-rule.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -49,6 +50,9 @@ enum lttng_domain_type lttng_event_rule_get_domain_type( case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: domain_type = LTTNG_DOMAIN_JUL; break; + case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: + domain_type = LTTNG_DOMAIN_LOG4J; + break; case LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL: case LTTNG_EVENT_RULE_TYPE_KERNEL_KPROBE: case LTTNG_EVENT_RULE_TYPE_KERNEL_FUNCTION: @@ -207,6 +211,10 @@ ssize_t lttng_event_rule_create_from_payload( create_from_payload = lttng_event_rule_jul_logging_create_from_payload; break; + case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: + create_from_payload = + lttng_event_rule_log4j_logging_create_from_payload; + break; default: ERR("Attempted to create event rule of unknown type (%i)", (int) event_rule_comm->event_rule_type); @@ -349,6 +357,8 @@ const char *lttng_event_rule_type_str(enum lttng_event_rule_type type) return "user tracepoint"; case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: return "jul logging"; + case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: + return "log4j logging"; default: abort(); } diff --git a/src/common/event-rule/log4j-logging.c b/src/common/event-rule/log4j-logging.c new file mode 100644 index 000000000..efe70aa59 --- /dev/null +++ b/src/common/event-rule/log4j-logging.c @@ -0,0 +1,845 @@ +/* + * Copyright (C) 2019 Jonathan Rajotte + * + * SPDX-License-Identifier: LGPL-2.1-only + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IS_LOG4J_LOGGING_EVENT_RULE(rule) \ + (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING) + +static void lttng_event_rule_log4j_logging_destroy(struct lttng_event_rule *rule) +{ + struct lttng_event_rule_log4j_logging *log4j_logging; + + if (rule == NULL) { + return; + } + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + + lttng_log_level_rule_destroy(log4j_logging->log_level_rule); + free(log4j_logging->pattern); + free(log4j_logging->filter_expression); + free(log4j_logging->internal_filter.filter); + free(log4j_logging->internal_filter.bytecode); + free(log4j_logging); +} + +static bool lttng_event_rule_log4j_logging_validate( + const struct lttng_event_rule *rule) +{ + bool valid = false; + struct lttng_event_rule_log4j_logging *log4j_logging; + + if (!rule) { + goto end; + } + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + + /* Required field. */ + if (!log4j_logging->pattern) { + ERR("Invalid log4j_logging event rule: a pattern must be set."); + goto end; + } + + valid = true; +end: + return valid; +} + +static int lttng_event_rule_log4j_logging_serialize( + const struct lttng_event_rule *rule, + struct lttng_payload *payload) +{ + int ret; + size_t pattern_len, filter_expression_len, header_offset; + size_t size_before_log_level_rule; + struct lttng_event_rule_log4j_logging *log4j_logging; + struct lttng_event_rule_log4j_logging_comm log4j_logging_comm; + struct lttng_event_rule_log4j_logging_comm *header; + + if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule)) { + ret = -1; + goto end; + } + + header_offset = payload->buffer.size; + + DBG("Serializing log4j_logging event rule."); + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + + pattern_len = strlen(log4j_logging->pattern) + 1; + + if (log4j_logging->filter_expression != NULL) { + filter_expression_len = + strlen(log4j_logging->filter_expression) + 1; + } else { + filter_expression_len = 0; + } + + log4j_logging_comm.pattern_len = pattern_len; + log4j_logging_comm.filter_expression_len = filter_expression_len; + + ret = lttng_dynamic_buffer_append(&payload->buffer, &log4j_logging_comm, + sizeof(log4j_logging_comm)); + if (ret) { + goto end; + } + + ret = lttng_dynamic_buffer_append( + &payload->buffer, log4j_logging->pattern, pattern_len); + if (ret) { + goto end; + } + + ret = lttng_dynamic_buffer_append(&payload->buffer, log4j_logging->filter_expression, + filter_expression_len); + if (ret) { + goto end; + } + + size_before_log_level_rule = payload->buffer.size; + + ret = lttng_log_level_rule_serialize(log4j_logging->log_level_rule, payload); + if (ret < 0) { + goto end; + } + + header = (typeof(header)) ((char *) payload->buffer.data + header_offset); + header->log_level_rule_len = + payload->buffer.size - size_before_log_level_rule; + +end: + return ret; +} + +static bool lttng_event_rule_log4j_logging_is_equal( + const struct lttng_event_rule *_a, + const struct lttng_event_rule *_b) +{ + bool is_equal = false; + struct lttng_event_rule_log4j_logging *a, *b; + + a = container_of(_a, struct lttng_event_rule_log4j_logging, parent); + b = container_of(_b, struct lttng_event_rule_log4j_logging, parent); + + /* Quick checks. */ + + if (!!a->filter_expression != !!b->filter_expression) { + goto end; + } + + /* Long check. */ + assert(a->pattern); + assert(b->pattern); + if (strcmp(a->pattern, b->pattern)) { + goto end; + } + + if (a->filter_expression && b->filter_expression) { + if (strcmp(a->filter_expression, b->filter_expression)) { + goto end; + } + } else if (!!a->filter_expression != !!b->filter_expression) { + /* One is set; not the other. */ + goto end; + } + + if (!lttng_log_level_rule_is_equal( + a->log_level_rule, b->log_level_rule)) { + goto end; + } + + is_equal = true; +end: + return is_equal; +} + +/* + * On success ret is 0; + * + * On error ret is negative. + * + * An event with NO loglevel and the name is * will return NULL. + */ +static int generate_agent_filter( + const struct lttng_event_rule *rule, char **_agent_filter) +{ + int err; + int ret = 0; + char *agent_filter = NULL; + const char *pattern; + const char *filter; + const struct lttng_log_level_rule *log_level_rule = NULL; + enum lttng_event_rule_status status; + + assert(rule); + assert(_agent_filter); + + status = lttng_event_rule_log4j_logging_get_name_pattern(rule, &pattern); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ret = -1; + goto end; + } + + status = lttng_event_rule_log4j_logging_get_filter(rule, &filter); + if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { + filter = NULL; + } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ret = -1; + goto end; + } + + + /* Don't add filter for the '*' event. */ + if (strcmp(pattern, "*") != 0) { + if (filter) { + err = asprintf(&agent_filter, + "(%s) && (logger_name == \"%s\")", + filter, pattern); + } else { + err = asprintf(&agent_filter, "logger_name == \"%s\"", + pattern); + } + + if (err < 0) { + PERROR("Failed to format agent filter string"); + ret = -1; + goto end; + } + } + + status = lttng_event_rule_log4j_logging_get_log_level_rule( + rule, &log_level_rule); + if (status == LTTNG_EVENT_RULE_STATUS_OK) { + enum lttng_log_level_rule_status llr_status; + const char *op; + int level; + + switch (lttng_log_level_rule_get_type(log_level_rule)) + { + case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: + llr_status = lttng_log_level_rule_exactly_get_level( + log_level_rule, &level); + op = "=="; + break; + case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: + llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level( + log_level_rule, &level); + op = ">="; + break; + default: + abort(); + } + + if (llr_status != LTTNG_LOG_LEVEL_RULE_STATUS_OK) { + ret = -1; + goto end; + } + + if (filter || agent_filter) { + char *new_filter; + + err = asprintf(&new_filter, + "(%s) && (int_loglevel %s %d)", + agent_filter ? agent_filter : filter, + op, level); + if (agent_filter) { + free(agent_filter); + } + agent_filter = new_filter; + } else { + err = asprintf(&agent_filter, "int_loglevel %s %d", op, + level); + } + + if (err < 0) { + PERROR("Failed to format agent filter string"); + ret = -1; + goto end; + } + } + + *_agent_filter = agent_filter; + agent_filter = NULL; + +end: + free(agent_filter); + return ret; +} + +static enum lttng_error_code +lttng_event_rule_log4j_logging_generate_filter_bytecode( + struct lttng_event_rule *rule, + const struct lttng_credentials *creds) +{ + int ret; + enum lttng_error_code ret_code; + struct lttng_event_rule_log4j_logging *log4j_logging; + enum lttng_event_rule_status status; + const char *filter; + struct lttng_bytecode *bytecode = NULL; + char *agent_filter; + + assert(rule); + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + + status = lttng_event_rule_log4j_logging_get_filter(rule, &filter); + if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { + filter = NULL; + } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ret_code = LTTNG_ERR_FILTER_INVAL; + goto end; + } + + if (filter && filter[0] == '\0') { + ret_code = LTTNG_ERR_FILTER_INVAL; + goto error; + } + + ret = generate_agent_filter(rule, &agent_filter); + if (ret) { + ret_code = LTTNG_ERR_FILTER_INVAL; + goto error; + } + + log4j_logging->internal_filter.filter = agent_filter; + + if (log4j_logging->internal_filter.filter == NULL) { + ret_code = LTTNG_OK; + goto end; + } + + ret = run_as_generate_filter_bytecode( + log4j_logging->internal_filter.filter, creds, + &bytecode); + if (ret) { + ret_code = LTTNG_ERR_FILTER_INVAL; + goto end; + } + + log4j_logging->internal_filter.bytecode = bytecode; + bytecode = NULL; + ret_code = LTTNG_OK; + +error: +end: + free(bytecode); + return ret_code; +} + +static const char *lttng_event_rule_log4j_logging_get_internal_filter( + const struct lttng_event_rule *rule) +{ + struct lttng_event_rule_log4j_logging *log4j_logging; + + assert(rule); + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + return log4j_logging->internal_filter.filter; +} + +static const struct lttng_bytecode * +lttng_event_rule_log4j_logging_get_internal_filter_bytecode( + const struct lttng_event_rule *rule) +{ + struct lttng_event_rule_log4j_logging *log4j_logging; + + assert(rule); + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + return log4j_logging->internal_filter.bytecode; +} + +static enum lttng_event_rule_generate_exclusions_status +lttng_event_rule_log4j_logging_generate_exclusions( + const struct lttng_event_rule *rule, + struct lttng_event_exclusion **_exclusions) +{ + /* Unsupported. */ + *_exclusions = NULL; + return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; +} + +static unsigned long lttng_event_rule_log4j_logging_hash( + const struct lttng_event_rule *rule) +{ + unsigned long hash; + struct lttng_event_rule_log4j_logging *tp_rule = + container_of(rule, typeof(*tp_rule), parent); + + hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING, + lttng_ht_seed); + hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed); + + if (tp_rule->filter_expression) { + hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed); + } + + if (tp_rule->log_level_rule) { + hash ^= lttng_log_level_rule_hash(tp_rule->log_level_rule); + } + + return hash; +} + +static struct lttng_event *lttng_event_rule_log4j_logging_generate_lttng_event( + const struct lttng_event_rule *rule) +{ + int ret; + const struct lttng_event_rule_log4j_logging *log4j_logging; + struct lttng_event *local_event = NULL; + struct lttng_event *event = NULL; + enum lttng_loglevel_type loglevel_type; + int loglevel_value = 0; + enum lttng_event_rule_status status; + const struct lttng_log_level_rule *log_level_rule; + + log4j_logging = container_of( + rule, const struct lttng_event_rule_log4j_logging, parent); + + local_event = zmalloc(sizeof(*local_event)); + if (!local_event) { + goto error; + } + + local_event->type = LTTNG_EVENT_TRACEPOINT; + ret = lttng_strncpy(local_event->name, log4j_logging->pattern, + sizeof(local_event->name)); + if (ret) { + ERR("Truncation occurred when copying event rule pattern to `lttng_event` structure: pattern = '%s'", + log4j_logging->pattern); + goto error; + } + + + /* Map the log level rule to an equivalent lttng_loglevel. */ + status = lttng_event_rule_log4j_logging_get_log_level_rule( + rule, &log_level_rule); + if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { + loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; + loglevel_value = 0; + } else if (status == LTTNG_EVENT_RULE_STATUS_OK) { + enum lttng_log_level_rule_status llr_status; + + switch (lttng_log_level_rule_get_type(log_level_rule)) { + case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: + llr_status = lttng_log_level_rule_exactly_get_level( + log_level_rule, &loglevel_value); + loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; + break; + case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: + llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level( + log_level_rule, &loglevel_value); + loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; + break; + default: + abort(); + break; + } + + if (llr_status != LTTNG_LOG_LEVEL_RULE_STATUS_OK) { + goto error; + } + } else { + goto error; + } + + local_event->loglevel_type = loglevel_type; + local_event->loglevel = loglevel_value; + + event = local_event; + local_event = NULL; +error: + free(local_event); + return event; +} + +struct lttng_event_rule *lttng_event_rule_log4j_logging_create(void) +{ + struct lttng_event_rule *rule = NULL; + struct lttng_event_rule_log4j_logging *tp_rule; + enum lttng_event_rule_status status; + + tp_rule = zmalloc(sizeof(struct lttng_event_rule_log4j_logging)); + if (!tp_rule) { + goto end; + } + + rule = &tp_rule->parent; + lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING); + tp_rule->parent.validate = lttng_event_rule_log4j_logging_validate; + tp_rule->parent.serialize = lttng_event_rule_log4j_logging_serialize; + tp_rule->parent.equal = lttng_event_rule_log4j_logging_is_equal; + tp_rule->parent.destroy = lttng_event_rule_log4j_logging_destroy; + tp_rule->parent.generate_filter_bytecode = + lttng_event_rule_log4j_logging_generate_filter_bytecode; + tp_rule->parent.get_filter = + lttng_event_rule_log4j_logging_get_internal_filter; + tp_rule->parent.get_filter_bytecode = + lttng_event_rule_log4j_logging_get_internal_filter_bytecode; + tp_rule->parent.generate_exclusions = + lttng_event_rule_log4j_logging_generate_exclusions; + tp_rule->parent.hash = lttng_event_rule_log4j_logging_hash; + tp_rule->parent.generate_lttng_event = + lttng_event_rule_log4j_logging_generate_lttng_event; + + tp_rule->log_level_rule = NULL; + + /* Default pattern is '*'. */ + status = lttng_event_rule_log4j_logging_set_name_pattern(rule, "*"); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + lttng_event_rule_destroy(rule); + rule = NULL; + } + +end: + return rule; +} + +LTTNG_HIDDEN +ssize_t lttng_event_rule_log4j_logging_create_from_payload( + struct lttng_payload_view *view, + struct lttng_event_rule **_event_rule) +{ + ssize_t ret, offset = 0; + enum lttng_event_rule_status status; + const struct lttng_event_rule_log4j_logging_comm *log4j_logging_comm; + const char *pattern; + const char *filter_expression = NULL; + struct lttng_buffer_view current_buffer_view; + struct lttng_event_rule *rule = NULL; + struct lttng_log_level_rule *log_level_rule = NULL; + + if (!_event_rule) { + ret = -1; + goto end; + } + + current_buffer_view = lttng_buffer_view_from_view( + &view->buffer, offset, sizeof(*log4j_logging_comm)); + if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { + ERR("Failed to initialize from malformed event rule log4j_logging: buffer too short to contain header."); + ret = -1; + goto end; + } + + log4j_logging_comm = (typeof(log4j_logging_comm)) current_buffer_view.data; + + rule = lttng_event_rule_log4j_logging_create(); + if (!rule) { + ERR("Failed to create event rule log4j_logging."); + ret = -1; + goto end; + } + + /* Skip to payload. */ + offset += current_buffer_view.size; + + /* Map the pattern. */ + current_buffer_view = lttng_buffer_view_from_view( + &view->buffer, offset, log4j_logging_comm->pattern_len); + + if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { + ret = -1; + goto end; + } + + pattern = current_buffer_view.data; + if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, + log4j_logging_comm->pattern_len)) { + ret = -1; + goto end; + } + + /* Skip after the pattern. */ + offset += log4j_logging_comm->pattern_len; + + if (!log4j_logging_comm->filter_expression_len) { + goto skip_filter_expression; + } + + /* Map the filter_expression. */ + current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, + log4j_logging_comm->filter_expression_len); + if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { + ret = -1; + goto end; + } + + filter_expression = current_buffer_view.data; + if (!lttng_buffer_view_contains_string(¤t_buffer_view, + filter_expression, + log4j_logging_comm->filter_expression_len)) { + ret = -1; + goto end; + } + + /* Skip after the pattern. */ + offset += log4j_logging_comm->filter_expression_len; + +skip_filter_expression: + if (!log4j_logging_comm->log_level_rule_len) { + goto skip_log_level_rule; + } + + { + /* Map the log level rule. */ + struct lttng_payload_view current_payload_view = + lttng_payload_view_from_view(view, offset, + log4j_logging_comm->log_level_rule_len); + + ret = lttng_log_level_rule_create_from_payload( + ¤t_payload_view, &log_level_rule); + if (ret < 0) { + ret = -1; + goto end; + } + + assert(ret == log4j_logging_comm->log_level_rule_len); + } + + /* Skip after the log level rule. */ + offset += log4j_logging_comm->log_level_rule_len; + +skip_log_level_rule: + + status = lttng_event_rule_log4j_logging_set_name_pattern(rule, pattern); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ERR("Failed to set event rule log4j_logging pattern."); + ret = -1; + goto end; + } + + if (filter_expression) { + status = lttng_event_rule_log4j_logging_set_filter( + rule, filter_expression); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ERR("Failed to set event rule log4j_logging pattern."); + ret = -1; + goto end; + } + } + + if (log_level_rule) { + status = lttng_event_rule_log4j_logging_set_log_level_rule( + rule, log_level_rule); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ERR("Failed to set event rule log4j_logging log level rule."); + ret = -1; + goto end; + } + } + + *_event_rule = rule; + rule = NULL; + ret = offset; +end: + lttng_log_level_rule_destroy(log_level_rule); + lttng_event_rule_destroy(rule); + return ret; +} + +enum lttng_event_rule_status lttng_event_rule_log4j_logging_set_name_pattern( + struct lttng_event_rule *rule, const char *pattern) +{ + char *pattern_copy = NULL; + struct lttng_event_rule_log4j_logging *log4j_logging; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !pattern || + strlen(pattern) == 0) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + pattern_copy = strdup(pattern); + if (!pattern_copy) { + status = LTTNG_EVENT_RULE_STATUS_ERROR; + goto end; + } + + /* Normalize the pattern. */ + strutils_normalize_star_glob_pattern(pattern_copy); + + free(log4j_logging->pattern); + + log4j_logging->pattern = pattern_copy; + pattern_copy = NULL; +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_log4j_logging_get_name_pattern( + const struct lttng_event_rule *rule, const char **pattern) +{ + struct lttng_event_rule_log4j_logging *log4j_logging; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !pattern) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + if (!log4j_logging->pattern) { + status = LTTNG_EVENT_RULE_STATUS_UNSET; + goto end; + } + + *pattern = log4j_logging->pattern; +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_log4j_logging_set_filter( + struct lttng_event_rule *rule, const char *expression) +{ + char *expression_copy = NULL; + struct lttng_event_rule_log4j_logging *log4j_logging; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !expression || + strlen(expression) == 0) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + expression_copy = strdup(expression); + if (!expression_copy) { + PERROR("Failed to copy filter expression"); + status = LTTNG_EVENT_RULE_STATUS_ERROR; + goto end; + } + + if (log4j_logging->filter_expression) { + free(log4j_logging->filter_expression); + } + + log4j_logging->filter_expression = expression_copy; + expression_copy = NULL; +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_log4j_logging_get_filter( + const struct lttng_event_rule *rule, const char **expression) +{ + struct lttng_event_rule_log4j_logging *log4j_logging; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !expression) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + if (!log4j_logging->filter_expression) { + status = LTTNG_EVENT_RULE_STATUS_UNSET; + goto end; + } + + *expression = log4j_logging->filter_expression; +end: + return status; +} + +static bool log_level_rule_valid(const struct lttng_log_level_rule *rule) +{ + /* + * For both LOG4J custom log level are possible and can + * span the entire int32 range. + */ + return true; +} + +enum lttng_event_rule_status lttng_event_rule_log4j_logging_set_log_level_rule( + struct lttng_event_rule *rule, + const struct lttng_log_level_rule *log_level_rule) +{ + struct lttng_event_rule_log4j_logging *log4j_logging; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + struct lttng_log_level_rule *copy = NULL; + + if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule)) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + + if (!log_level_rule_valid(log_level_rule)) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + copy = lttng_log_level_rule_copy(log_level_rule); + if (copy == NULL) { + status = LTTNG_EVENT_RULE_STATUS_ERROR; + goto end; + } + + if (log4j_logging->log_level_rule) { + lttng_log_level_rule_destroy(log4j_logging->log_level_rule); + } + + log4j_logging->log_level_rule = copy; + +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_log4j_logging_get_log_level_rule( + const struct lttng_event_rule *rule, + const struct lttng_log_level_rule **log_level_rule + ) +{ + struct lttng_event_rule_log4j_logging *log4j_logging; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !log_level_rule) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + log4j_logging = container_of( + rule, struct lttng_event_rule_log4j_logging, parent); + if (log4j_logging->log_level_rule == NULL) { + status = LTTNG_EVENT_RULE_STATUS_UNSET; + goto end; + } + + *log_level_rule = log4j_logging->log_level_rule; +end: + return status; +} diff --git a/tests/unit/test_event_rule.c b/tests/unit/test_event_rule.c index e0adb133d..5ef1bf992 100644 --- a/tests/unit/test_event_rule.c +++ b/tests/unit/test_event_rule.c @@ -44,7 +44,7 @@ int lttng_opt_quiet = 1; int lttng_opt_verbose; int lttng_opt_mi; -#define NUM_TESTS 291 +#define NUM_TESTS 304 struct tracepoint_test { enum lttng_domain_type type; @@ -433,6 +433,71 @@ void test_event_rule_jul_logging(void) lttng_log_level_rule_destroy(log_level_rule); } +static +void test_event_rule_log4j_logging(void) +{ + struct lttng_event_rule *log4j_logging = NULL; + struct lttng_event_rule *log4j_logging_from_buffer = NULL; + enum lttng_event_rule_status status; + const char *pattern="my_event_*"; + const char *filter="msg_id == 23 && size >= 2048"; + const char *tmp; + struct lttng_log_level_rule *log_level_rule = NULL; + const struct lttng_log_level_rule *log_level_rule_return = NULL; + struct lttng_payload payload; + + diag("Testing lttng_event_rule_user_log4j_logging."); + + lttng_payload_init(&payload); + + log_level_rule = lttng_log_level_rule_exactly_create(LTTNG_LOGLEVEL_INFO); + assert(log_level_rule); + + log4j_logging = lttng_event_rule_log4j_logging_create(); + ok(log4j_logging, "log4j_logging object."); + + status = lttng_event_rule_log4j_logging_set_name_pattern(log4j_logging, pattern); + ok(status == LTTNG_EVENT_RULE_STATUS_OK, "setting pattern."); + status = lttng_event_rule_log4j_logging_get_name_pattern(log4j_logging, &tmp); + ok(status == LTTNG_EVENT_RULE_STATUS_OK, "getting pattern."); + ok(!strncmp(pattern, tmp, strlen(pattern)), "pattern is equal."); + + status = lttng_event_rule_log4j_logging_set_filter(log4j_logging, filter); + ok(status == LTTNG_EVENT_RULE_STATUS_OK, "setting filter."); + status = lttng_event_rule_log4j_logging_get_filter(log4j_logging, &tmp); + ok(status == LTTNG_EVENT_RULE_STATUS_OK, "getting filter."); + ok(!strncmp(filter, tmp, strlen(filter)), "filter is equal."); + + status = lttng_event_rule_log4j_logging_get_log_level_rule(log4j_logging, &log_level_rule_return); + ok(status == LTTNG_EVENT_RULE_STATUS_UNSET, "get unset log level rule."); + + status = lttng_event_rule_log4j_logging_set_log_level_rule( + log4j_logging, log_level_rule); + ok(status == LTTNG_EVENT_RULE_STATUS_OK, "setting log level rule."); + status = lttng_event_rule_log4j_logging_get_log_level_rule( + log4j_logging, &log_level_rule_return); + ok(status == LTTNG_EVENT_RULE_STATUS_OK, "get log level rule."); + + ok(lttng_event_rule_serialize(log4j_logging, &payload) == 0, "Serializing."); + + { + struct lttng_payload_view view = + lttng_payload_view_from_payload( + &payload, 0, -1); + + ok(lttng_event_rule_create_from_payload( + &view, &log4j_logging_from_buffer) > 0, + "Deserializing."); + } + + ok(lttng_event_rule_is_equal(log4j_logging, log4j_logging_from_buffer), "serialized and from buffer are equal."); + + lttng_payload_reset(&payload); + lttng_event_rule_destroy(log4j_logging); + lttng_event_rule_destroy(log4j_logging_from_buffer); + lttng_log_level_rule_destroy(log_level_rule); +} + static void test_event_rule_userspace_probe(void) { struct lttng_event_rule *uprobe = NULL; @@ -793,6 +858,7 @@ int main(int argc, const char *argv[]) test_event_rule_syscall(); test_event_rule_userspace_probe(); test_event_rule_kernel_probe(); + test_event_rule_log4j_logging(); test_event_rule_jul_logging(); test_event_rule_log_level_ust(); test_event_rule_log_level_jul(); -- 2.34.1