diff options
| -rw-r--r-- | tools/lib/traceevent/event-parse.h | 21 | ||||
| -rw-r--r-- | tools/lib/traceevent/parse-filter.c | 135 |
2 files changed, 99 insertions, 57 deletions
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index 089964e..3ad784f 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -357,6 +357,8 @@ enum pevent_flag { _PE(READ_PRINT_FAILED, "failed to read event print fmt"), \ _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\ _PE(INVALID_ARG_TYPE, "invalid argument type"), \ + _PE(INVALID_EXP_TYPE, "invalid expression type"), \ + _PE(INVALID_OP_TYPE, "invalid operator type"), \ _PE(INVALID_EVENT_NAME, "invalid event name"), \ _PE(EVENT_NOT_FOUND, "no event found"), \ _PE(SYNTAX_ERROR, "syntax error"), \ @@ -373,12 +375,16 @@ enum pevent_flag { _PE(INVALID_PAREN, "open parenthesis cannot come here"), \ _PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \ _PE(UNKNOWN_TOKEN, "unknown token"), \ - _PE(FILTER_NOT_FOUND, "no filter found") + _PE(FILTER_NOT_FOUND, "no filter found"), \ + _PE(NOT_A_NUMBER, "must have number field"), \ + _PE(NO_FILTER, "no filters exists"), \ + _PE(FILTER_MISS, "record does not match to filter") #undef _PE #define _PE(__code, __str) PEVENT_ERRNO__ ## __code enum pevent_errno { PEVENT_ERRNO__SUCCESS = 0, + PEVENT_ERRNO__FILTER_MATCH = PEVENT_ERRNO__SUCCESS, /* * Choose an arbitrary negative big number not to clash with standard @@ -853,10 +859,11 @@ struct event_filter { struct event_filter *pevent_filter_alloc(struct pevent *pevent); -#define FILTER_NONE -2 -#define FILTER_NOEXIST -1 -#define FILTER_MISS 0 -#define FILTER_MATCH 1 +/* for backward compatibility */ +#define FILTER_NONE PEVENT_ERRNO__FILTER_NOT_FOUND +#define FILTER_NOEXIST PEVENT_ERRNO__NO_FILTER +#define FILTER_MISS PEVENT_ERRNO__FILTER_MISS +#define FILTER_MATCH PEVENT_ERRNO__FILTER_MATCH enum filter_trivial_type { FILTER_TRIVIAL_FALSE, @@ -868,8 +875,8 @@ enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter, const char *filter_str); -int pevent_filter_match(struct event_filter *filter, - struct pevent_record *record); +enum pevent_errno pevent_filter_match(struct event_filter *filter, + struct pevent_record *record); int pevent_event_filtered(struct event_filter *filter, int event_id); diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c index 78440d7..9303c55 100644 --- a/tools/lib/traceevent/parse-filter.c +++ b/tools/lib/traceevent/parse-filter.c @@ -1678,8 +1678,8 @@ int pevent_filter_event_has_trivial(struct event_filter *filter, } } -static int test_filter(struct event_format *event, - struct filter_arg *arg, struct pevent_record *record); +static int test_filter(struct event_format *event, struct filter_arg *arg, + struct pevent_record *record, enum pevent_errno *err); static const char * get_comm(struct event_format *event, struct pevent_record *record) @@ -1725,15 +1725,24 @@ get_value(struct event_format *event, } static unsigned long long -get_arg_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record); +get_arg_value(struct event_format *event, struct filter_arg *arg, + struct pevent_record *record, enum pevent_errno *err); static unsigned long long -get_exp_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record) +get_exp_value(struct event_format *event, struct filter_arg *arg, + struct pevent_record *record, enum pevent_errno *err) { unsigned long long lval, rval; - lval = get_arg_value(event, arg->exp.left, record); - rval = get_arg_value(event, arg->exp.right, record); + lval = get_arg_value(event, arg->exp.left, record, err); + rval = get_arg_value(event, arg->exp.right, record, err); + + if (*err) { + /* + * There was an error, no need to process anymore. + */ + return 0; + } switch (arg->exp.type) { case FILTER_EXP_ADD: @@ -1768,39 +1777,51 @@ get_exp_value(struct event_format *event, struct filter_arg *arg, struct pevent_ case FILTER_EXP_NOT: default: - die("error in exp"); + if (!*err) + *err = PEVENT_ERRNO__INVALID_EXP_TYPE; } return 0; } static unsigned long long -get_arg_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record) +get_arg_value(struct event_format *event, struct filter_arg *arg, + struct pevent_record *record, enum pevent_errno *err) { switch (arg->type) { case FILTER_ARG_FIELD: return get_value(event, arg->field.field, record); case FILTER_ARG_VALUE: - if (arg->value.type != FILTER_NUMBER) - die("must have number field!"); + if (arg->value.type != FILTER_NUMBER) { + if (!*err) + *err = PEVENT_ERRNO__NOT_A_NUMBER; + } return arg->value.val; case FILTER_ARG_EXP: - return get_exp_value(event, arg, record); + return get_exp_value(event, arg, record, err); default: - die("oops in filter"); + if (!*err) + *err = PEVENT_ERRNO__INVALID_ARG_TYPE; } return 0; } -static int test_num(struct event_format *event, - struct filter_arg *arg, struct pevent_record *record) +static int test_num(struct event_format *event, struct filter_arg *arg, + struct pevent_record *record, enum pevent_errno *err) { unsigned long long lval, rval; - lval = get_arg_value(event, arg->num.left, record); - rval = get_arg_value(event, arg->num.right, record); + lval = get_arg_value(event, arg->num.left, record, err); + rval = get_arg_value(event, arg->num.right, record, err); + + if (*err) { + /* + * There was an error, no need to process anymore. + */ + return 0; + } switch (arg->num.type) { case FILTER_CMP_EQ: @@ -1822,7 +1843,8 @@ static int test_num(struct event_format *event, return lval <= rval; default: - /* ?? */ + if (!*err) + *err = PEVENT_ERRNO__ILLEGAL_INTEGER_CMP; return 0; } } @@ -1869,8 +1891,8 @@ static const char *get_field_str(struct filter_arg *arg, struct pevent_record *r return val; } -static int test_str(struct event_format *event, - struct filter_arg *arg, struct pevent_record *record) +static int test_str(struct event_format *event, struct filter_arg *arg, + struct pevent_record *record, enum pevent_errno *err) { const char *val; @@ -1894,48 +1916,57 @@ static int test_str(struct event_format *event, return regexec(&arg->str.reg, val, 0, NULL, 0); default: - /* ?? */ + if (!*err) + *err = PEVENT_ERRNO__ILLEGAL_STRING_CMP; return 0; } } -static int test_op(struct event_format *event, - struct filter_arg *arg, struct pevent_record *record) +static int test_op(struct event_format *event, struct filter_arg *arg, + struct pevent_record *record, enum pevent_errno *err) { switch (arg->op.type) { case FILTER_OP_AND: - return test_filter(event, arg->op.left, record) && - test_filter(event, arg->op.right, record); + return test_filter(event, arg->op.left, record, err) && + test_filter(event, arg->op.right, record, err); case FILTER_OP_OR: - return test_filter(event, arg->op.left, record) || - test_filter(event, arg->op.right, record); + return test_filter(event, arg->op.left, record, err) || + test_filter(event, arg->op.right, record, err); case FILTER_OP_NOT: - return !test_filter(event, arg->op.right, record); + return !test_filter(event, arg->op.right, record, err); default: - /* ?? */ + if (!*err) + *err = PEVENT_ERRNO__INVALID_OP_TYPE; return 0; } } -static int test_filter(struct event_format *event, - struct filter_arg *arg, struct pevent_record *record) +static int test_filter(struct event_format *event, struct filter_arg *arg, + struct pevent_record *record, enum pevent_errno *err) { + if (*err) { + /* + * There was an error, no need to process anymore. + */ + return 0; + } + switch (arg->type) { case FILTER_ARG_BOOLEAN: /* easy case */ return arg->boolean.value; case FILTER_ARG_OP: - return test_op(event, arg, record); + return test_op(event, arg, record, err); case FILTER_ARG_NUM: - return test_num(event, arg, record); + return test_num(event, arg, record, err); case FILTER_ARG_STR: - return test_str(event, arg, record); + return test_str(event, arg, record, err); case FILTER_ARG_EXP: case FILTER_ARG_VALUE: @@ -1944,11 +1975,11 @@ static int test_filter(struct event_format *event, * Expressions, fields and values evaluate * to true if they return non zero */ - return !!get_arg_value(event, arg, record); + return !!get_arg_value(event, arg, record, err); default: - die("oops!"); - /* ?? */ + if (!*err) + *err = PEVENT_ERRNO__INVALID_ARG_TYPE; return 0; } } @@ -1961,8 +1992,7 @@ static int test_filter(struct event_format *event, * Returns 1 if filter found for @event_id * otherwise 0; */ -int pevent_event_filtered(struct event_filter *filter, - int event_id) +int pevent_event_filtered(struct event_filter *filter, int event_id) { struct filter_type *filter_type; @@ -1979,31 +2009,36 @@ int pevent_event_filtered(struct event_filter *filter, * @filter: filter struct with filter information * @record: the record to test against the filter * - * Returns: - * 1 - filter found for event and @record matches - * 0 - filter found for event and @record does not match - * -1 - no filter found for @record's event - * -2 - if no filters exist + * Returns: match result or error code (prefixed with PEVENT_ERRNO__) + * FILTER_MATCH - filter found for event and @record matches + * FILTER_MISS - filter found for event and @record does not match + * FILTER_NOT_FOUND - no filter found for @record's event + * NO_FILTER - if no filters exist + * otherwise - error occurred during test */ -int pevent_filter_match(struct event_filter *filter, - struct pevent_record *record) +enum pevent_errno pevent_filter_match(struct event_filter *filter, + struct pevent_record *record) { struct pevent *pevent = filter->pevent; struct filter_type *filter_type; int event_id; + int ret; + enum pevent_errno err = 0; if (!filter->filters) - return FILTER_NONE; + return PEVENT_ERRNO__NO_FILTER; event_id = pevent_data_type(pevent, record); filter_type = find_filter_type(filter, event_id); - if (!filter_type) - return FILTER_NOEXIST; + return PEVENT_ERRNO__FILTER_NOT_FOUND; + + ret = test_filter(filter_type->event, filter_type->filter, record, &err); + if (err) + return err; - return test_filter(filter_type->event, filter_type->filter, record) ? - FILTER_MATCH : FILTER_MISS; + return ret ? PEVENT_ERRNO__FILTER_MATCH : PEVENT_ERRNO__FILTER_MISS; } static char *op_to_str(struct event_filter *filter, struct filter_arg *arg) |
