1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2005 Michel Dagenais
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
24 simple expr [ op expr ]
26 read_simple_expression
27 read_field_path [ rel value ]
30 read_field_component [. field path]
39 path(component...) -> field
41 consist in AND, OR and NOT nested expressions, forming a tree with
42 simple relations as leaves. The simple relations test is a field
43 in an event is equal, not equal, smaller, smaller or equal, larger, or
44 larger or equal to a specified value.
54 * - refine switch of expression in multiple uses functions
55 * - remove the idle expressions in the tree ****
56 * - add the current simple expression to the tree
57 * * clear the field_path array after use
60 #include <lttv/filter.h>
66 LTTV_FILTER_TRACEFILE,
79 LTTV_FILTER_EX_SUBMODE,
85 * Constructor for LttvSimpleExpression
86 * @return pointer to new LttvSimpleExpression
89 lttv_simple_expression_new() {
91 LttvSimpleExpression
* se
= g_new(LttvSimpleExpression
,1);
93 se
->field
= LTTV_FILTER_UNDEFINED
;
101 * add a node to the current tree
102 * FIXME: Might be used to lower coding in lttv_filter_new switch expression
103 * @param stack the tree stack
104 * @param subtree the subtree if available (pointer or NULL)
105 * @param op the logical operator that will form the node
108 lttv_filter_tree_add_node(GPtrArray
* stack
, LttvFilterTree
* subtree
, LttvLogicalOp op
) {
110 LttvFilterTree
* t1
= NULL
;
111 LttvFilterTree
* t2
= NULL
;
113 t1
= (LttvFilterTree
*)g_ptr_array_index(stack
,stack
->len
-1);
114 while(t1
->right
!= LTTV_TREE_IDLE
) t1
= t1
->r_child
.t
;
115 t2
= lttv_filter_tree_new();
117 if(subtree
!= NULL
) {
118 t2
->left
= LTTV_TREE_NODE
;
119 t2
->l_child
.t
= subtree
;
121 t1
->right
= LTTV_TREE_NODE
;
124 // a_simple_expression->value = a_field_component->str;
125 // a_field_component = g_string_new("");
126 t2
->left
= LTTV_TREE_LEAF
;
127 // t2->l_child.leaf = a_simple_expression;
128 // a_simple_expression = g_new(lttv_simple_expression,1);
129 t1
->right
= LTTV_TREE_NODE
;
136 * Parse through filtering field hierarchy as specified
137 * by user. This function compares each value to
138 * predetermined quarks
139 * @param fp The field path list
140 * @param se current simple expression
141 * @return success/failure of operation
144 parse_field_path(GPtrArray
* fp
, LttvSimpleExpression
* se
) {
147 if(fp
->len
< 2) return FALSE
;
148 g_assert(f
=g_ptr_array_index(fp
,0)); //list_first(fp)->data;
151 * Parse through the specified
154 * Take note however that the
155 * 'event' subfields might change
156 * depending on values specified
157 * in core.xml file. Hence, if
158 * none of the subfields in the
159 * array match the hardcoded
160 * subfields, it will be considered
163 if(g_strcasecmp(f
->str
,"trace") ) {
168 f
=g_ptr_array_index(fp
,1);
169 if(g_strcasecmp(f
->str
,"name")) {
170 se
->field
= LTTV_FILTER_TRACE_NAME
;
173 } else if(g_strcasecmp(f
->str
,"traceset") ) {
175 * FIXME: not yet implemented !
177 } else if(g_strcasecmp(f
->str
,"tracefile") ) {
182 f
=g_ptr_array_index(fp
,1);
183 if(g_strcasecmp(f
->str
,"name")) {
184 se
->field
= LTTV_FILTER_TRACEFILE_NAME
;
187 } else if(g_strcasecmp(f
->str
,"state") ) {
192 * state.creation_time
193 * state.insertion_time
195 * state.execution_mode
196 * state.execution_submode
197 * state.process_status
200 f
=g_ptr_array_index(fp
,1);
201 if(g_strcasecmp(f
->str
,"pid") ) {
202 se
->field
= LTTV_FILTER_STATE_PID
;
204 else if(g_strcasecmp(f
->str
,"ppid") ) {
205 se
->field
= LTTV_FILTER_STATE_PPID
;
207 else if(g_strcasecmp(f
->str
,"creation_time") ) {
208 se
->field
= LTTV_FILTER_STATE_CT
;
210 else if(g_strcasecmp(f
->str
,"insertion_time") ) {
211 se
->field
= LTTV_FILTER_STATE_IT
;
213 else if(g_strcasecmp(f
->str
,"process_name") ) {
214 se
->field
= LTTV_FILTER_STATE_P_NAME
;
216 else if(g_strcasecmp(f
->str
,"execution_mode") ) {
217 se
->field
= LTTV_FILTER_STATE_EX_MODE
;
219 else if(g_strcasecmp(f
->str
,"execution_submode") ) {
220 se
->field
= LTTV_FILTER_STATE_EX_SUBMODE
;
222 else if(g_strcasecmp(f
->str
,"process_status") ) {
223 se
->field
= LTTV_FILTER_STATE_P_STATUS
;
225 else if(g_strcasecmp(f
->str
,"cpu") ) {
226 se
->field
= LTTV_FILTER_STATE_CPU
;
229 } else if(g_strcasecmp(f
->str
,"event") ) {
237 f
=g_ptr_array_index(fp
,1);
238 if(g_strcasecmp(f
->str
,"name") ) {
239 se
->field
= LTTV_FILTER_EVENT_NAME
;
241 else if(g_strcasecmp(f
->str
,"category") ) {
243 * FIXME: Category not yet functional in lttv
245 se
->field
= LTTV_FILTER_EVENT_CATEGORY
;
247 else if(g_strcasecmp(f
->str
,"time") ) {
248 se
->field
= LTTV_FILTER_EVENT_TIME
;
249 // offset = &((LttEvent*)NULL)->event_time);
251 else if(g_strcasecmp(f
->str
,"tsc") ) {
252 se
->field
= LTTV_FILTER_EVENT_TSC
;
253 // offset = &((LttEvent*)NULL)->event_cycle_count);
255 else { /* core.xml specified options */
256 se
->field
= LTTV_FILTER_EVENT_FIELD
;
257 //se->offset = (...);
260 g_warning("Unrecognized field in filter string");
264 /* free the pointer array */
265 g_ptr_array_free(fp
,FALSE
);
271 * Sets the function pointer for the current
273 * @param se current simple expression
274 * @return success/failure of operation
276 gboolean
assign_operator(LttvSimpleExpression
* se
, LttvExpressionOp op
) {
280 case LTTV_FILTER_TRACE_NAME
:
281 case LTTV_FILTER_TRACEFILE_NAME
:
282 case LTTV_FILTER_STATE_P_NAME
:
283 case LTTV_FILTER_EVENT_NAME
:
286 se
->op
= lttv_apply_op_eq_string
;
289 se
->op
= lttv_apply_op_eq_string
;
292 g_warning("Error encountered in operator assignment");
296 case LTTV_FILTER_STATE_PID
:
297 case LTTV_FILTER_STATE_PPID
:
298 case LTTV_FILTER_STATE_EX_MODE
:
299 case LTTV_FILTER_STATE_EX_SUBMODE
:
300 case LTTV_FILTER_STATE_P_STATUS
:
303 se
->op
= lttv_apply_op_eq_uint64
;
306 se
->op
= lttv_apply_op_ne_uint64
;
309 se
->op
= lttv_apply_op_lt_uint64
;
312 se
->op
= lttv_apply_op_le_uint64
;
315 se
->op
= lttv_apply_op_gt_uint64
;
318 se
->op
= lttv_apply_op_ge_uint64
;
321 g_warning("Error encountered in operator assignment");
325 case LTTV_FILTER_STATE_CT
:
326 case LTTV_FILTER_STATE_IT
:
327 case LTTV_FILTER_EVENT_TIME
:
328 case LTTV_FILTER_EVENT_TSC
:
331 se
->op
= lttv_apply_op_eq_double
;
334 se
->op
= lttv_apply_op_ne_double
;
337 se
->op
= lttv_apply_op_lt_double
;
340 se
->op
= lttv_apply_op_le_double
;
343 se
->op
= lttv_apply_op_gt_double
;
346 se
->op
= lttv_apply_op_ge_double
;
349 g_warning("Error encountered in operator assignment");
354 g_warning("Error encountered in operator assignment");
361 * Add an filtering option to the current tree
362 * @param expression Current expression to parse
363 * @return success/failure of operation
366 parse_simple_expression(GString
* expression
) {
376 * Append a new expression to the expression
377 * defined in the current filter
378 * @param filter pointer to the current LttvFilter
379 * @param expression string that must be appended
381 void lttv_filter_append_expression(LttvFilter
* filter
, char *expression
) {
383 if(expression
== NULL
) return;
385 filter
= lttv_filter_new();
386 filter
->expression
= expression
;
387 } else if(filter
->expression
== NULL
) {
388 filter
->expression
= expression
;
390 filter
->expression
= g_strconcat(filter
->expression
,"&",expression
);
393 lttv_filter_update(filter
);
397 void lttv_filter_clear_expression(LttvFilter
* filter
) {
399 if(filter
->expression
!= NULL
) {
400 g_free(filter
->expression
);
401 filter
->expression
= NULL
;
407 * Applies the 'equal' operator to the
408 * specified structure and value
409 * @param v1 left member of comparison
410 * @param v2 right member of comparison
411 * @return success/failure of operation
413 gboolean
lttv_apply_op_eq_uint64(gpointer v1
, char* v2
) {
415 guint64
* r
= (guint64
*) v1
;
416 guint64 l
= atoi(v2
);
422 * Applies the 'equal' operator to the
423 * specified structure and value
424 * @param v1 left member of comparison
425 * @param v2 right member of comparison
426 * @return success/failure of operation
428 gboolean
lttv_apply_op_eq_uint32(gpointer v1
, char* v2
) {
429 guint32
* r
= (guint32
*) v1
;
430 guint32 l
= atoi(v2
);
435 * Applies the 'equal' operator to the
436 * specified structure and value
437 * @param v1 left member of comparison
438 * @param v2 right member of comparison
439 * @return success/failure of operation
441 gboolean
lttv_apply_op_eq_uint16(gpointer v1
, char* v2
) {
442 guint16
* r
= (guint16
*) v1
;
443 guint16 l
= atoi(v2
);
448 * Applies the 'equal' operator to the
449 * specified structure and value
450 * @param v1 left member of comparison
451 * @param v2 right member of comparison
452 * @return success/failure of operation
454 gboolean
lttv_apply_op_eq_double(gpointer v1
, char* v2
) {
455 double* r
= (double*) v1
;
461 * Applies the 'equal' operator to the
462 * specified structure and value
463 * @param v1 left member of comparison
464 * @param v2 right member of comparison
465 * @return success/failure of operation
467 gboolean
lttv_apply_op_eq_string(gpointer v1
, char* v2
) {
468 char* r
= (char*) v1
;
469 return (g_strcasecmp(r
,v2
));
473 * Applies the 'not equal' operator to the
474 * specified structure and value
475 * @param v1 left member of comparison
476 * @param v2 right member of comparison
477 * @return success/failure of operation
479 gboolean
lttv_apply_op_ne_uint64(gpointer v1
, char* v2
) {
480 guint64
* r
= (guint64
*) v1
;
481 guint64 l
= atoi(v2
);
486 * Applies the 'not equal' operator to the
487 * specified structure and value
488 * @param v1 left member of comparison
489 * @param v2 right member of comparison
490 * @return success/failure of operation
492 gboolean
lttv_apply_op_ne_uint32(gpointer v1
, char* v2
) {
493 guint32
* r
= (guint32
*) v1
;
494 guint32 l
= atoi(v2
);
499 * Applies the 'not equal' operator to the
500 * specified structure and value
501 * @param v1 left member of comparison
502 * @param v2 right member of comparison
503 * @return success/failure of operation
505 gboolean
lttv_apply_op_ne_uint16(gpointer v1
, char* v2
) {
506 guint16
* r
= (guint16
*) v1
;
507 guint16 l
= atoi(v2
);
512 * Applies the 'not equal' operator to the
513 * specified structure and value
514 * @param v1 left member of comparison
515 * @param v2 right member of comparison
516 * @return success/failure of operation
518 gboolean
lttv_apply_op_ne_double(gpointer v1
, char* v2
) {
519 double* r
= (double*) v1
;
525 * Applies the 'not equal' operator to the
526 * specified structure and value
527 * @param v1 left member of comparison
528 * @param v2 right member of comparison
529 * @return success/failure of operation
531 gboolean
lttv_apply_op_ne_string(gpointer v1
, char* v2
) {
532 char* r
= (char*) v1
;
533 return (!g_strcasecmp(r
,v2
));
537 * Applies the 'lower than' operator to the
538 * specified structure and value
539 * @param v1 left member of comparison
540 * @param v2 right member of comparison
541 * @return success/failure of operation
543 gboolean
lttv_apply_op_lt_uint64(gpointer v1
, char* v2
) {
544 guint64
* r
= (guint64
*) v1
;
545 guint64 l
= atoi(v2
);
550 * Applies the 'lower than' operator to the
551 * specified structure and value
552 * @param v1 left member of comparison
553 * @param v2 right member of comparison
554 * @return success/failure of operation
556 gboolean
lttv_apply_op_lt_uint32(gpointer v1
, char* v2
) {
557 guint32
* r
= (guint32
*) v1
;
558 guint32 l
= atoi(v2
);
563 * Applies the 'lower than' operator to the
564 * specified structure and value
565 * @param v1 left member of comparison
566 * @param v2 right member of comparison
567 * @return success/failure of operation
569 gboolean
lttv_apply_op_lt_uint16(gpointer v1
, char* v2
) {
570 guint16
* r
= (guint16
*) v1
;
571 guint16 l
= atoi(v2
);
576 * Applies the 'lower than' operator to the
577 * specified structure and value
578 * @param v1 left member of comparison
579 * @param v2 right member of comparison
580 * @return success/failure of operation
582 gboolean
lttv_apply_op_lt_double(gpointer v1
, char* v2
) {
583 double* r
= (double*) v1
;
589 * Applies the 'lower than' operator to the
590 * specified structure and value
591 * @param v1 left member of comparison
592 * @param v2 right member of comparison
593 * @return success/failure of operation
595 gboolean
lttv_apply_op_le_uint64(gpointer v1
, char* v2
) {
596 guint64
* r
= (guint64
*) v1
;
597 guint64 l
= atoi(v2
);
602 * Applies the 'lower or equal' operator to the
603 * specified structure and value
604 * @param v1 left member of comparison
605 * @param v2 right member of comparison
606 * @return success/failure of operation
608 gboolean
lttv_apply_op_le_uint32(gpointer v1
, char* v2
) {
609 guint32
* r
= (guint32
*) v1
;
610 guint32 l
= atoi(v2
);
615 * Applies the 'lower or equal' operator to the
616 * specified structure and value
617 * @param v1 left member of comparison
618 * @param v2 right member of comparison
619 * @return success/failure of operation
621 gboolean
lttv_apply_op_le_uint16(gpointer v1
, char* v2
) {
622 guint16
* r
= (guint16
*) v1
;
623 guint16 l
= atoi(v2
);
628 * Applies the 'lower or equal' operator to the
629 * specified structure and value
630 * @param v1 left member of comparison
631 * @param v2 right member of comparison
632 * @return success/failure of operation
634 gboolean
lttv_apply_op_le_double(gpointer v1
, char* v2
) {
635 double* r
= (double*) v1
;
641 * Applies the 'greater than' operator to the
642 * specified structure and value
643 * @param v1 left member of comparison
644 * @param v2 right member of comparison
645 * @return success/failure of operation
647 gboolean
lttv_apply_op_gt_uint64(gpointer v1
, char* v2
) {
648 guint64
* r
= (guint64
*) v1
;
649 guint64 l
= atoi(v2
);
654 * Applies the 'greater than' operator to the
655 * specified structure and value
656 * @param v1 left member of comparison
657 * @param v2 right member of comparison
658 * @return success/failure of operation
660 gboolean
lttv_apply_op_gt_uint32(gpointer v1
, char* v2
) {
661 guint32
* r
= (guint32
*) v1
;
662 guint32 l
= atoi(v2
);
667 * Applies the 'greater than' operator to the
668 * specified structure and value
669 * @param v1 left member of comparison
670 * @param v2 right member of comparison
671 * @return success/failure of operation
673 gboolean
lttv_apply_op_gt_uint16(gpointer v1
, char* v2
) {
674 guint16
* r
= (guint16
*) v1
;
675 guint16 l
= atoi(v2
);
680 * Applies the 'greater than' operator to the
681 * specified structure and value
682 * @param v1 left member of comparison
683 * @param v2 right member of comparison
684 * @return success/failure of operation
686 gboolean
lttv_apply_op_gt_double(gpointer v1
, char* v2
) {
687 double* r
= (double*) v1
;
693 * Applies the 'greater or equal' operator to the
694 * specified structure and value
695 * @param v1 left member of comparison
696 * @param v2 right member of comparison
697 * @return success/failure of operation
699 gboolean
lttv_apply_op_ge_uint64(gpointer v1
, char* v2
) {
700 guint64
* r
= (guint64
*) v1
;
701 guint64 l
= atoi(v2
);
706 * Applies the 'greater or equal' operator to the
707 * specified structure and value
708 * @param v1 left member of comparison
709 * @param v2 right member of comparison
710 * @return success/failure of operation
712 gboolean
lttv_apply_op_ge_uint32(gpointer v1
, char* v2
) {
713 guint32
* r
= (guint32
*) v1
;
714 guint32 l
= atoi(v2
);
719 * Applies the 'greater or equal' operator to the
720 * specified structure and value
721 * @param v1 left member of comparison
722 * @param v2 right member of comparison
723 * @return success/failure of operation
725 gboolean
lttv_apply_op_ge_uint16(gpointer v1
, char* v2
) {
726 guint16
* r
= (guint16
*) v1
;
727 guint16 l
= atoi(v2
);
732 * Applies the 'greater or equal' operator to the
733 * specified structure and value
734 * @param v1 left member of comparison
735 * @param v2 right member of comparison
736 * @return success/failure of operation
738 gboolean
lttv_apply_op_ge_double(gpointer v1
, char* v2
) {
739 double* r
= (double*) v1
;
746 * Makes a copy of the current filter tree
747 * @param tree pointer to the current tree
748 * @return new copy of the filter tree
751 lttv_filter_tree_clone(LttvFilterTree
* tree
) {
758 * Makes a copy of the current filter
759 * @param filter pointer to the current filter
760 * @return new copy of the filter
763 lttv_filter_clone(LttvFilter
* filter
) {
766 LttvFilter
* newfilter
= g_new(LttvFilter
,1);
768 // newfilter->expression = g_new(char,1)
769 strcpy(newfilter
->expression
,filter
->expression
);
771 newfilter
->head
= lttv_filter_tree_clone(filter
->head
);
779 * Creates a new lttv_filter
780 * @param expression filtering options string
781 * @param t pointer to the current LttvTrace
782 * @return the current lttv_filter or NULL if error
787 LttvFilter
* filter
= g_new(LttvFilter
,1);
788 filter
->expression
= NULL
;
794 lttv_filter_update(LttvFilter
* filter
) {
796 g_print("filter::lttv_filter_new()\n"); /* debug */
798 if(filter
->expression
== NULL
) return FALSE
;
802 p_nesting
=0, /* parenthesis nesting value */
803 b
=0; /* current breakpoint in expression string */
807 *tree
= lttv_filter_tree_new(), /* main tree */
808 *subtree
= NULL
, /* buffer for subtrees */
814 * If the tree already exists,
815 * destroy it and build a new one
817 if(filter
->head
!= NULL
) lttv_filter_tree_destroy(filter
->head
);
822 * each element of the list
823 * is a sub tree created
824 * by the use of parenthesis in the
825 * global expression. The final tree
826 * will be the one left at the root of
829 GPtrArray
*tree_stack
= g_ptr_array_new();
830 g_ptr_array_add( tree_stack
,(gpointer
) tree
);
832 /* temporary values */
833 GString
*a_field_component
= g_string_new("");
834 GPtrArray
*a_field_path
= NULL
;
836 LttvSimpleExpression
* a_simple_expression
= lttv_simple_expression_new();
839 * Parse entire expression and construct
840 * the binary tree. There are two steps
841 * in browsing that string
842 * 1. finding boolean ops " &,|,^,! " and parenthesis " {,(,[,],),} "
843 * 2. finding simple expressions
844 * - field path ( separated by dots )
845 * - op ( >, <, =, >=, <=, !=)
846 * - value ( integer, string ... )
847 * To spare computing time, the whole
848 * string is parsed in this loop for a
849 * O(n) complexity order.
851 * When encountering logical op &,|,^
852 * 1. parse the last value if any
853 * 2. create a new tree
854 * 3. add the expression (simple exp, or exp (subtree)) to the tree
855 * 4. concatenate this tree with the current tree on top of the stack
856 * When encountering math ops >,>=,<,<=,=,!=
857 * 1. add to op to the simple expression
858 * 2. concatenate last field component to field path
859 * When encountering concatening ops .
860 * 1. concatenate last field component to field path
861 * When encountering opening parenthesis (,{,[
862 * 1. create a new subtree on top of tree stack
863 * When encountering closing parenthesis ),},]
864 * 1. add the expression on right child of the current tree
865 * 2. the subtree is completed, allocate a new subtree
866 * 3. pop the tree value from the tree stack
869 a_field_path
= g_ptr_array_new();
870 g_ptr_array_set_size(a_field_path
,2); /* by default, recording 2 field expressions */
873 for(i
=0;i
<strlen(filter
->expression
);i
++) {
875 g_print("%c ",filter
->expression
[i
]);
876 switch(filter
->expression
[i
]) {
881 t1
= (LttvFilterTree
*)g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
882 while(t1
->right
!= LTTV_TREE_IDLE
) t1
= t1
->r_child
.t
;
883 t2
= lttv_filter_tree_new();
884 t2
->node
= LTTV_LOGICAL_AND
;
885 if(subtree
!= NULL
) { /* append subtree to current tree */
886 t2
->left
= LTTV_TREE_NODE
;
887 t2
->l_child
.t
= subtree
;
889 t1
->right
= LTTV_TREE_NODE
;
891 } else { /* append a simple expression */
892 a_simple_expression
->value
= a_field_component
->str
;
893 a_field_component
= g_string_new("");
894 t2
->left
= LTTV_TREE_LEAF
;
895 t2
->l_child
.leaf
= a_simple_expression
;
896 a_simple_expression
= lttv_simple_expression_new();
897 t1
->right
= LTTV_TREE_NODE
;
903 t1
= (LttvFilter
*)g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
904 while(t1
->right
!= LTTV_TREE_IDLE
) t1
= t1
->r_child
.t
;
905 t2
= lttv_filter_tree_new();
906 t2
->node
= LTTV_LOGICAL_OR
;
907 if(subtree
!= NULL
) { /* append subtree to current tree */
908 t2
->left
= LTTV_TREE_NODE
;
909 t2
->l_child
.t
= subtree
;
911 t1
->right
= LTTV_TREE_NODE
;
913 } else { /* append a simple expression */
914 a_simple_expression
->value
= a_field_component
->str
;
915 a_field_component
= g_string_new("");
916 t2
->left
= LTTV_TREE_LEAF
;
917 t2
->l_child
.leaf
= a_simple_expression
;
918 a_simple_expression
= lttv_simple_expression_new();
919 t1
->right
= LTTV_TREE_NODE
;
924 t1
= (LttvFilter
*)g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
925 while(t1
->right
!= LTTV_TREE_IDLE
) t1
= t1
->r_child
.t
;
926 t2
= lttv_filter_tree_new();
927 t2
->node
= LTTV_LOGICAL_XOR
;
928 if(subtree
!= NULL
) { /* append subtree to current tree */
929 t2
->left
= LTTV_TREE_NODE
;
930 t2
->l_child
.t
= subtree
;
932 t1
->right
= LTTV_TREE_NODE
;
934 } else { /* append a simple expression */
935 a_simple_expression
->value
= a_field_component
->str
;
936 a_field_component
= g_string_new("");
937 t2
->left
= LTTV_TREE_LEAF
;
938 t2
->l_child
.leaf
= a_simple_expression
;
939 a_simple_expression
= lttv_simple_expression_new();
940 t1
->right
= LTTV_TREE_NODE
;
944 case '!': /* not, or not equal (math op) */
945 if(filter
->expression
[i
+1] == '=') { /* != */
946 assign_operator(a_simple_expression
,LTTV_FIELD_NE
);
948 g_ptr_array_add( a_field_path
,(gpointer
) a_field_component
);
949 parse_field_path(a_field_path
,a_simple_expression
);
950 a_field_component
= g_string_new("");
952 // g_print("%s\n",a_field_component);
953 // a_field_component = g_string_new("");
954 t1
= (LttvFilter
*)g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
955 while(t1
->right
!= LTTV_TREE_IDLE
) t1
= t1
->r_child
.t
;
956 t2
= lttv_filter_tree_new();
957 t2
->node
= LTTV_LOGICAL_NOT
;
958 t1
->right
= LTTV_TREE_NODE
;
962 case '(': /* start of parenthesis */
965 p_nesting
++; /* incrementing parenthesis nesting value */
966 t1
= lttv_filter_tree_new();
967 g_ptr_array_add( tree_stack
,(gpointer
) t1
);
969 case ')': /* end of parenthesis */
972 p_nesting
--; /* decrementing parenthesis nesting value */
973 if(p_nesting
<0 || tree_stack
->len
<2) {
974 g_warning("Wrong filtering options, the string\n\"%s\"\n\
975 is not valid due to parenthesis incorrect use",filter
->expression
);
979 g_assert(tree_stack
->len
>0);
980 if(subtree
!= NULL
) { /* append subtree to current tree */
981 t1
= g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
982 while(t1
->right
!= LTTV_TREE_IDLE
&& t1
->right
!= LTTV_TREE_LEAF
) {
983 g_assert(t1
!=NULL
&& t1
->r_child
.t
!= NULL
);
986 t1
->right
= LTTV_TREE_NODE
;
987 t1
->r_child
.t
= subtree
;
988 subtree
= g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
989 g_ptr_array_remove_index(tree_stack
,tree_stack
->len
-1);
990 } else { /* assign subtree as current tree */
991 a_simple_expression
->value
= a_field_component
->str
;
992 a_field_component
= g_string_new("");
993 t1
= g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
994 while(t1
->right
!= LTTV_TREE_IDLE
) t1
= t1
->r_child
.t
;
995 t1
->right
= LTTV_TREE_LEAF
;
996 t1
->r_child
.leaf
= a_simple_expression
;
997 a_simple_expression
= lttv_simple_expression_new();
998 subtree
= g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
999 g_assert(subtree
!= NULL
);
1000 g_ptr_array_remove_index(tree_stack
,tree_stack
->len
-1);
1005 * mathematic operators
1007 case '<': /* lower, lower or equal */
1008 if(filter
->expression
[i
+1] == '=') { /* <= */
1010 assign_operator(a_simple_expression
,LTTV_FIELD_LE
);
1011 } else assign_operator(a_simple_expression
,LTTV_FIELD_LT
);
1012 g_ptr_array_add( a_field_path
,(gpointer
) a_field_component
);
1013 parse_field_path(a_field_path
,a_simple_expression
);
1014 a_field_component
= g_string_new("");
1016 case '>': /* higher, higher or equal */
1017 if(filter
->expression
[i
+1] == '=') { /* >= */
1019 assign_operator(a_simple_expression
,LTTV_FIELD_GE
);
1020 } else assign_operator(a_simple_expression
,LTTV_FIELD_GT
);
1021 g_ptr_array_add( a_field_path
,(gpointer
) a_field_component
);
1022 parse_field_path(a_field_path
,a_simple_expression
);
1023 a_field_component
= g_string_new("");
1025 case '=': /* equal */
1026 assign_operator(a_simple_expression
,LTTV_FIELD_EQ
);
1027 g_ptr_array_add( a_field_path
,(gpointer
) a_field_component
);
1028 parse_field_path(a_field_path
,a_simple_expression
);
1029 a_field_component
= g_string_new("");
1032 * Field concatening caracter
1036 * divide field expression into elements
1037 * in a_field_path array.
1039 if(a_simple_expression
->op
!= NULL
) {
1040 g_ptr_array_add( a_field_path
,(gpointer
) a_field_component
);
1041 a_field_component
= g_string_new("");
1044 default: /* concatening current string */
1045 g_string_append_c(a_field_component
,filter
->expression
[i
]);
1049 g_print("subtree:%p, tree:%p, t1:%p, t2:%p\n",subtree
,tree
,t1
,t2
);
1050 g_print("stack size: %i\n",tree_stack
->len
);
1053 * Preliminary check to see
1054 * if tree was constructed correctly
1057 g_warning("Wrong filtering options, the string\n\"%s\"\n\
1058 is not valid due to parenthesis incorrect use",filter
->expression
);
1062 if(tree_stack
->len
!= 1) /* only root tree should remain */
1065 /* processing last element of expression */
1066 t1
= g_ptr_array_index(tree_stack
,tree_stack
->len
-1);
1067 while(t1
->right
!= LTTV_TREE_IDLE
) t1
= t1
->r_child
.t
;
1068 if(subtree
!= NULL
) { /* add the subtree */
1069 t1
->right
= LTTV_TREE_NODE
;
1070 t1
->r_child
.t
= subtree
;
1072 } else { /* add a leaf */
1073 a_simple_expression
->value
= a_field_component
->str
;
1074 a_field_component
= g_string_new("");
1075 t1
->right
= LTTV_TREE_LEAF
;
1076 t1
->r_child
.leaf
= a_simple_expression
;
1078 * FIXME: is it really necessary to reallocate
1079 * LttvSimpleExpression at this point ??
1081 a_simple_expression
= lttv_simple_expression_new();
1084 g_assert(tree
!= NULL
);
1085 g_assert(subtree
== NULL
);
1093 lttv_filter_destroy(LttvFilter
* filter
) {
1095 g_free(filter
->expression
);
1096 lttv_filter_tree_destroy(filter
->head
);
1102 * Assign a new tree for the current expression
1104 * @return pointer of LttvFilterTree
1107 lttv_filter_tree_new() {
1108 LttvFilterTree
* tree
;
1110 tree
= g_new(LttvFilter
,1);
1111 tree
->node
= 0; //g_new(lttv_expression,1);
1112 tree
->left
= LTTV_TREE_IDLE
;
1113 tree
->right
= LTTV_TREE_IDLE
;
1119 * Destroys the tree and his sub-trees
1120 * @param tree Tree which must be destroyed
1123 lttv_filter_tree_destroy(LttvFilterTree
* tree
) {
1125 if(tree
== NULL
) return;
1127 if(tree
->left
== LTTV_TREE_LEAF
) g_free(tree
->l_child
.leaf
);
1128 else if(tree
->left
== LTTV_TREE_NODE
) lttv_filter_tree_destroy(tree
->l_child
.t
);
1130 if(tree
->right
== LTTV_TREE_LEAF
) g_free(tree
->r_child
.leaf
);
1131 else if(tree
->right
== LTTV_TREE_NODE
) lttv_filter_tree_destroy(tree
->r_child
.t
);
1139 * Apply the filter to a specific trace
1140 * @param filter the current filter applied
1141 * @param tracefile the trace to apply the filter to
1142 * @return success/failure of operation
1145 lttv_filter_tracefile(LttvFilter
*filter
, LttTracefile
*tracefile
) {
1147 LttvFilterTree
* t
= filter
->head
;
1150 * Each tree is parsed in inorder.
1151 * This way, it's possible to apply the left filter of the
1152 * tree, then decide whether or not the right branch should
1153 * be parsed depending on the linking logical operator
1155 * As for the filtering structure, since we are trying
1156 * to remove elements from the trace, it might be better
1157 * managing an array of all items to be removed ..
1160 /////////////////////////////////////////////////////////////////////////////
1162 /////////////////////////////////////////////////////////////////////////////
1163 g_print("node:%p lchild:%p rchild:%p\n",t
,t
->l_child
.t
,t
->r_child
.t
);
1164 g_print("node type%i\n",t
->node
);
1165 if(t
->left
== LTTV_TREE_NODE
) lttv_filter_tracefile(t
->l_child
.t
,NULL
);
1166 else if(t
->left
== LTTV_TREE_LEAF
) {
1167 g_assert(t
->l_child
.leaf
->value
!= NULL
);
1168 g_print("%p: left is qqch %i %s\n",t
,t
->l_child
.leaf
->op
,t
->l_child
.leaf
->value
);
1170 if(t
->right
== LTTV_TREE_NODE
) lttv_filter_tracefile(t
->r_child
.t
,NULL
);
1171 else if(t
->right
== LTTV_TREE_LEAF
) {
1172 g_assert(t
->r_child
.leaf
->value
!= NULL
);
1173 g_print("%p: right is qqch %i %s\n",t
,t
->r_child
.leaf
->op
,t
->r_child
.leaf
->value
);
1175 /////////////////////////////////////////////////////////////////////////////
1182 char *f_name, *e_name;
1184 char* field = "cpu";
1192 GString *fe_name = g_string_new("");
1194 nb = ltt_trace_eventtype_number(tcs->parent.t);
1195 g_print("NB:%i\n",nb);
1196 for(i = 0 ; i < nb ; i++) {
1197 et = ltt_trace_eventtype_get(tcs->parent.t, i);
1198 e_name = ltt_eventtype_name(et);
1199 f_name = ltt_facility_name(ltt_eventtype_facility(et));
1200 g_string_printf(fe_name, "%s.%s", f_name, e_name);
1201 g_print("facility:%s and event:%s\n",f_name,e_name);
1207 lttv_filter_tracestate(LttvFilter
*filter
, LttvTraceState
*tracestate
) {
1212 * Apply the filter to a specific event
1213 * @param filter the current filter applied
1214 * @param event the event to apply the filter to
1215 * @return success/failure of operation
1218 lttv_filter_event(LttvFilter
*filter
, LttEvent
*event
) {
1223 * Initializes the filter module and specific values
1225 static void module_init()
1229 * Quarks initialization
1230 * for hardcoded filtering options
1232 * TODO: traceset has no yet been defined
1236 // LTTV_FILTER_EVENT = g_quark_from_string("event");
1237 // LTTV_FILTER_TRACE = g_quark_from_string("trace");
1238 // LTTV_FILTER_TRACESET = g_quark_from_string("traceset");
1239 // LTTV_FILTER_STATE = g_quark_from_string("state");
1240 // LTTV_FILTER_TRACEFILE = g_quark_from_string("tracefile");
1242 /* event.name, tracefile.name, trace.name */
1243 // LTTV_FILTER_NAME = g_quark_from_string("name");
1245 /* event sub fields */
1246 // LTTV_FILTER_CATEGORY = g_quark_from_string("category");
1247 // LTTV_FILTER_TIME = g_quark_from_string("time");
1248 // LTTV_FILTER_TSC = g_quark_from_string("tsc");
1250 /* state sub fields */
1251 // LTTV_FILTER_PID = g_quark_from_string("pid");
1252 // LTTV_FILTER_PPID = g_quark_from_string("ppid");
1253 // LTTV_FILTER_C_TIME = g_quark_from_string("creation_time");
1254 // LTTV_FILTER_I_TIME = g_quark_from_string("insertion_time");
1255 // LTTV_FILTER_P_NAME = g_quark_from_string("process_name");
1256 // LTTV_FILTER_EX_MODE = g_quark_from_string("execution_mode");
1257 // LTTV_FILTER_EX_SUBMODE = g_quark_from_string("execution_submode");
1258 // LTTV_FILTER_P_STATUS = g_quark_from_string("process_status");
1259 // LTTV_FILTER_CPU = g_quark_from_string("cpu");
1264 * Destroys the filter module and specific values
1266 static void module_destroy()
1271 LTTV_MODULE("filter", "Filters traceset and events", \
1272 "Filters traceset and events specifically to user input", \
1273 module_init
, module_destroy
)