diff options
Diffstat (limited to 'tools/lib/traceevent/event-parse.c')
| -rw-r--r-- | tools/lib/traceevent/event-parse.c | 129 |
1 files changed, 82 insertions, 47 deletions
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; } |