diff options
Diffstat (limited to 'tools/lib/traceevent')
| -rw-r--r-- | tools/lib/traceevent/event-parse-api.c | 4 | ||||
| -rw-r--r-- | tools/lib/traceevent/event-parse-local.h | 4 | ||||
| -rw-r--r-- | tools/lib/traceevent/event-parse.c | 129 | ||||
| -rw-r--r-- | tools/lib/traceevent/event-parse.h | 17 | ||||
| -rw-r--r-- | tools/lib/traceevent/plugin_kvm.c | 2 | ||||
| -rw-r--r-- | tools/lib/traceevent/trace-seq.c | 17 |
6 files changed, 110 insertions, 63 deletions
diff --git a/tools/lib/traceevent/event-parse-api.c b/tools/lib/traceevent/event-parse-api.c index 8b31c0e00ba3..d463761a58f4 100644 --- a/tools/lib/traceevent/event-parse-api.c +++ b/tools/lib/traceevent/event-parse-api.c @@ -194,13 +194,13 @@ void tep_set_page_size(struct tep_handle *pevent, int _page_size) } /** - * tep_is_file_bigendian - get if the file is in big endian order + * tep_file_bigendian - get if the file is in big endian order * @pevent: a handle to the tep_handle * * This returns if the file is in big endian order * If @pevent is NULL, 0 is returned. */ -int tep_is_file_bigendian(struct tep_handle *pevent) +int tep_file_bigendian(struct tep_handle *pevent) { if(pevent) return pevent->file_bigendian; diff --git a/tools/lib/traceevent/event-parse-local.h b/tools/lib/traceevent/event-parse-local.h index 9a092dd4a86d..35833ee32d6c 100644 --- a/tools/lib/traceevent/event-parse-local.h +++ b/tools/lib/traceevent/event-parse-local.h @@ -7,7 +7,7 @@ #ifndef _PARSE_EVENTS_INT_H #define _PARSE_EVENTS_INT_H -struct cmdline; +struct tep_cmdline; struct cmdline_list; struct func_map; struct func_list; @@ -36,7 +36,7 @@ struct tep_handle { int long_size; int page_size; - struct cmdline *cmdlines; + struct tep_cmdline *cmdlines; struct cmdline_list *cmdlist; int cmdline_count; diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 69a96e39f0ab..abd4fa5d3088 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -124,15 +124,15 @@ struct tep_print_arg *alloc_arg(void) return calloc(1, sizeof(struct tep_print_arg)); } -struct cmdline { +struct tep_cmdline { char *comm; int pid; }; static int cmdline_cmp(const void *a, const void *b) { - const struct cmdline *ca = a; - const struct cmdline *cb = b; + const struct tep_cmdline *ca = a; + const struct tep_cmdline *cb = b; if (ca->pid < cb->pid) return -1; @@ -152,7 +152,7 @@ static int cmdline_init(struct tep_handle *pevent) { struct cmdline_list *cmdlist = pevent->cmdlist; struct cmdline_list *item; - struct cmdline *cmdlines; + struct tep_cmdline *cmdlines; int i; cmdlines = malloc(sizeof(*cmdlines) * pevent->cmdline_count); @@ -179,8 +179,8 @@ static int cmdline_init(struct tep_handle *pevent) static const char *find_cmdline(struct tep_handle *pevent, int pid) { - const struct cmdline *comm; - struct cmdline key; + const struct tep_cmdline *comm; + struct tep_cmdline key; if (!pid) return "<idle>"; @@ -208,8 +208,8 @@ static const char *find_cmdline(struct tep_handle *pevent, int pid) */ int tep_pid_is_registered(struct tep_handle *pevent, int pid) { - const struct cmdline *comm; - struct cmdline key; + const struct tep_cmdline *comm; + struct tep_cmdline key; if (!pid) return 1; @@ -232,11 +232,13 @@ int tep_pid_is_registered(struct tep_handle *pevent, int pid) * we must add this pid. This is much slower than when cmdlines * are added before the array is initialized. */ -static int add_new_comm(struct tep_handle *pevent, const char *comm, int pid) +static int add_new_comm(struct tep_handle *pevent, + const char *comm, int pid, bool override) { - struct cmdline *cmdlines = pevent->cmdlines; - const struct cmdline *cmdline; - struct cmdline key; + struct tep_cmdline *cmdlines = pevent->cmdlines; + struct tep_cmdline *cmdline; + struct tep_cmdline key; + char *new_comm; if (!pid) return 0; @@ -247,8 +249,19 @@ static int add_new_comm(struct tep_handle *pevent, const char *comm, int pid) cmdline = bsearch(&key, pevent->cmdlines, pevent->cmdline_count, sizeof(*pevent->cmdlines), cmdline_cmp); if (cmdline) { - errno = EEXIST; - return -1; + if (!override) { + errno = EEXIST; + return -1; + } + new_comm = strdup(comm); + if (!new_comm) { + errno = ENOMEM; + return -1; + } + free(cmdline->comm); + cmdline->comm = new_comm; + + return 0; } cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (pevent->cmdline_count + 1)); @@ -275,21 +288,13 @@ static int add_new_comm(struct tep_handle *pevent, const char *comm, int pid) return 0; } -/** - * tep_register_comm - register a pid / comm mapping - * @pevent: handle for the pevent - * @comm: the command line to register - * @pid: the pid to map the command line to - * - * This adds a mapping to search for command line names with - * a given pid. The comm is duplicated. - */ -int tep_register_comm(struct tep_handle *pevent, const char *comm, int pid) +static int _tep_register_comm(struct tep_handle *pevent, + const char *comm, int pid, bool override) { struct cmdline_list *item; if (pevent->cmdlines) - return add_new_comm(pevent, comm, pid); + return add_new_comm(pevent, comm, pid, override); item = malloc(sizeof(*item)); if (!item) @@ -312,6 +317,40 @@ int tep_register_comm(struct tep_handle *pevent, const char *comm, int pid) return 0; } +/** + * tep_register_comm - register a pid / comm mapping + * @pevent: handle for the pevent + * @comm: the command line to register + * @pid: the pid to map the command line to + * + * This adds a mapping to search for command line names with + * a given pid. The comm is duplicated. If a command with the same pid + * already exist, -1 is returned and errno is set to EEXIST + */ +int tep_register_comm(struct tep_handle *pevent, const char *comm, int pid) +{ + return _tep_register_comm(pevent, comm, pid, false); +} + +/** + * tep_override_comm - register a pid / comm mapping + * @pevent: handle for the pevent + * @comm: the command line to register + * @pid: the pid to map the command line to + * + * This adds a mapping to search for command line names with + * a given pid. The comm is duplicated. If a command with the same pid + * already exist, the command string is udapted with the new one + */ +int tep_override_comm(struct tep_handle *pevent, const char *comm, int pid) +{ + if (!pevent->cmdlines && cmdline_init(pevent)) { + errno = ENOMEM; + return -1; + } + return _tep_register_comm(pevent, comm, pid, true); +} + int tep_register_trace_clock(struct tep_handle *pevent, const char *trace_clock) { pevent->trace_clock = strdup(trace_clock); @@ -5227,18 +5266,6 @@ int tep_data_type(struct tep_handle *pevent, struct tep_record *rec) } /** - * tep_data_event_from_type - find the event by a given type - * @pevent: a handle to the pevent - * @type: the type of the event. - * - * This returns the event form a given @type; - */ -struct tep_event *tep_data_event_from_type(struct tep_handle *pevent, int type) -{ - return tep_find_event(pevent, type); -} - -/** * tep_data_pid - parse the PID from record * @pevent: a handle to the pevent * @rec: the record to parse @@ -5292,8 +5319,8 @@ const char *tep_data_comm_from_pid(struct tep_handle *pevent, int pid) return comm; } -static struct cmdline * -pid_from_cmdlist(struct tep_handle *pevent, const char *comm, struct cmdline *next) +static struct tep_cmdline * +pid_from_cmdlist(struct tep_handle *pevent, const char *comm, struct tep_cmdline *next) { struct cmdline_list *cmdlist = (struct cmdline_list *)next; @@ -5305,7 +5332,7 @@ pid_from_cmdlist(struct tep_handle *pevent, const char *comm, struct cmdline *ne while (cmdlist && strcmp(cmdlist->comm, comm) != 0) cmdlist = cmdlist->next; - return (struct cmdline *)cmdlist; + return (struct tep_cmdline *)cmdlist; } /** @@ -5321,10 +5348,10 @@ pid_from_cmdlist(struct tep_handle *pevent, const char *comm, struct cmdline *ne * next pid. * Also, it does a linear search, so it may be slow. */ -struct cmdline *tep_data_pid_from_comm(struct tep_handle *pevent, const char *comm, - struct cmdline *next) +struct tep_cmdline *tep_data_pid_from_comm(struct tep_handle *pevent, const char *comm, + struct tep_cmdline *next) { - struct cmdline *cmdline; + struct tep_cmdline *cmdline; /* * If the cmdlines have not been converted yet, then use @@ -5363,7 +5390,7 @@ struct cmdline *tep_data_pid_from_comm(struct tep_handle *pevent, const char *co * Returns the pid for a give cmdline. If @cmdline is NULL, then * -1 is returned. */ -int tep_cmdline_pid(struct tep_handle *pevent, struct cmdline *cmdline) +int tep_cmdline_pid(struct tep_handle *pevent, struct tep_cmdline *cmdline) { struct cmdline_list *cmdlist = (struct cmdline_list *)cmdline; @@ -6593,6 +6620,12 @@ static struct tep_event *search_event(struct tep_handle *pevent, int id, * * If @id is >= 0, then it is used to find the event. * else @sys_name and @event_name are used. + * + * Returns: + * TEP_REGISTER_SUCCESS_OVERWRITE if an existing handler is overwritten + * TEP_REGISTER_SUCCESS if a new handler is registered successfully + * negative TEP_ERRNO_... in case of an error + * */ int tep_register_event_handler(struct tep_handle *pevent, int id, const char *sys_name, const char *event_name, @@ -6610,7 +6643,7 @@ int tep_register_event_handler(struct tep_handle *pevent, int id, event->handler = func; event->context = context; - return 0; + return TEP_REGISTER_SUCCESS_OVERWRITE; not_found: /* Save for later use. */ @@ -6640,7 +6673,7 @@ int tep_register_event_handler(struct tep_handle *pevent, int id, pevent->handlers = handle; handle->context = context; - return -1; + return TEP_REGISTER_SUCCESS; } static int handle_matches(struct event_handler *handler, int id, @@ -6723,8 +6756,10 @@ struct tep_handle *tep_alloc(void) { struct tep_handle *pevent = calloc(1, sizeof(*pevent)); - if (pevent) + if (pevent) { pevent->ref_count = 1; + pevent->host_bigendian = tep_host_bigendian(); + } return pevent; } diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index 35d37087d3c5..aec48f2aea8a 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -432,6 +432,7 @@ int tep_set_function_resolver(struct tep_handle *pevent, tep_func_resolver_t *func, void *priv); void tep_reset_function_resolver(struct tep_handle *pevent); int tep_register_comm(struct tep_handle *pevent, const char *comm, int pid); +int tep_override_comm(struct tep_handle *pevent, const char *comm, int pid); int tep_register_trace_clock(struct tep_handle *pevent, const char *trace_clock); int tep_register_function(struct tep_handle *pevent, char *name, unsigned long long addr, char *mod); @@ -484,6 +485,11 @@ int tep_print_func_field(struct trace_seq *s, const char *fmt, struct tep_event *event, const char *name, struct tep_record *record, int err); +enum tep_reg_handler { + TEP_REGISTER_SUCCESS = 0, + TEP_REGISTER_SUCCESS_OVERWRITE, +}; + int tep_register_event_handler(struct tep_handle *pevent, int id, const char *sys_name, const char *event_name, tep_event_handler_func func, void *context); @@ -520,15 +526,14 @@ tep_find_event_by_record(struct tep_handle *pevent, struct tep_record *record); void tep_data_lat_fmt(struct tep_handle *pevent, struct trace_seq *s, struct tep_record *record); int tep_data_type(struct tep_handle *pevent, struct tep_record *rec); -struct tep_event *tep_data_event_from_type(struct tep_handle *pevent, int type); int tep_data_pid(struct tep_handle *pevent, struct tep_record *rec); int tep_data_preempt_count(struct tep_handle *pevent, struct tep_record *rec); int tep_data_flags(struct tep_handle *pevent, struct tep_record *rec); const char *tep_data_comm_from_pid(struct tep_handle *pevent, int pid); -struct cmdline; -struct cmdline *tep_data_pid_from_comm(struct tep_handle *pevent, const char *comm, - struct cmdline *next); -int tep_cmdline_pid(struct tep_handle *pevent, struct cmdline *cmdline); +struct tep_cmdline; +struct tep_cmdline *tep_data_pid_from_comm(struct tep_handle *pevent, const char *comm, + struct tep_cmdline *next); +int tep_cmdline_pid(struct tep_handle *pevent, struct tep_cmdline *cmdline); void tep_print_field(struct trace_seq *s, void *data, struct tep_format_field *field); @@ -553,7 +558,7 @@ int tep_get_long_size(struct tep_handle *pevent); void tep_set_long_size(struct tep_handle *pevent, int long_size); int tep_get_page_size(struct tep_handle *pevent); void tep_set_page_size(struct tep_handle *pevent, int _page_size); -int tep_is_file_bigendian(struct tep_handle *pevent); +int tep_file_bigendian(struct tep_handle *pevent); void tep_set_file_bigendian(struct tep_handle *pevent, enum tep_endian endian); int tep_is_host_bigendian(struct tep_handle *pevent); void tep_set_host_bigendian(struct tep_handle *pevent, enum tep_endian endian); diff --git a/tools/lib/traceevent/plugin_kvm.c b/tools/lib/traceevent/plugin_kvm.c index 754050eea467..64b9c25a1fd3 100644 --- a/tools/lib/traceevent/plugin_kvm.c +++ b/tools/lib/traceevent/plugin_kvm.c @@ -389,7 +389,7 @@ static int kvm_mmu_print_role(struct trace_seq *s, struct tep_record *record, * We can only use the structure if file is of the same * endianness. */ - if (tep_is_file_bigendian(event->pevent) == + if (tep_file_bigendian(event->pevent) == tep_is_host_bigendian(event->pevent)) { trace_seq_printf(s, "%u q%u%s %s%s %spae %snxe %swp%s%s%s", diff --git a/tools/lib/traceevent/trace-seq.c b/tools/lib/traceevent/trace-seq.c index 8ff1d55954d1..8d5ecd2bf877 100644 --- a/tools/lib/traceevent/trace-seq.c +++ b/tools/lib/traceevent/trace-seq.c @@ -100,7 +100,8 @@ static void expand_buffer(struct trace_seq *s) * @fmt: printf format string * * It returns 0 if the trace oversizes the buffer's free - * space, 1 otherwise. + * space, the number of characters printed, or a negative + * value in case of an error. * * The tracer may use either sequence operations or its own * copy to user routines. To simplify formating of a trace @@ -129,9 +130,10 @@ trace_seq_printf(struct trace_seq *s, const char *fmt, ...) goto try_again; } - s->len += ret; + if (ret > 0) + s->len += ret; - return 1; + return ret; } /** @@ -139,6 +141,10 @@ trace_seq_printf(struct trace_seq *s, const char *fmt, ...) * @s: trace sequence descriptor * @fmt: printf format string * + * It returns 0 if the trace oversizes the buffer's free + * space, the number of characters printed, or a negative + * value in case of an error. + * * * The tracer may use either sequence operations or its own * copy to user routines. To simplify formating of a trace * trace_seq_printf is used to store strings into a special @@ -163,9 +169,10 @@ trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) goto try_again; } - s->len += ret; + if (ret > 0) + s->len += ret; - return len; + return ret; } /** |