1 // SPDX-License-Identifier: GPL-2.0-only
3  * call-path.h: Manipulate a tree data structure containing function call paths
12 #include "call-path.h"
15 			    struct symbol *sym, u64 ip, bool in_kernel)  in call_path__init()  argument
17 	cp->parent = parent;  in call_path__init()
18 	cp->sym = sym;  in call_path__init()
19 	cp->ip = sym ? 0 : ip;  in call_path__init()
20 	cp->db_id = 0;  in call_path__init()
21 	cp->in_kernel = in_kernel;  in call_path__init()
22 	RB_CLEAR_NODE(&cp->rb_node);  in call_path__init()
23 	cp->children = RB_ROOT;  in call_path__init()
33 	call_path__init(&cpr->call_path, NULL, NULL, 0, false);  in call_path_root__new()
34 	INIT_LIST_HEAD(&cpr->blocks);  in call_path_root__new()
42 	list_for_each_entry_safe(pos, n, &cpr->blocks, node) {  in call_path_root__free()
43 		list_del_init(&pos->node);  in call_path_root__free()
51 					struct symbol *sym, u64 ip,  in call_path__new()  argument
58 	if (cpr->next < cpr->sz) {  in call_path__new()
59 		cpb = list_last_entry(&cpr->blocks, struct call_path_block,  in call_path__new()
65 		list_add_tail(&cpb->node, &cpr->blocks);  in call_path__new()
66 		cpr->sz += CALL_PATH_BLOCK_SIZE;  in call_path__new()
69 	n = cpr->next++ & CALL_PATH_BLOCK_MASK;  in call_path__new()
70 	cp = &cpb->cp[n];  in call_path__new()
72 	call_path__init(cp, parent, sym, ip, in_kernel);  in call_path__new()
79 				     struct symbol *sym, u64 ip, u64 ks)  in call_path__findnew()  argument
84 	bool in_kernel = ip >= ks;  in call_path__findnew()
87 		ip = 0;  in call_path__findnew()
90 		return call_path__new(cpr, parent, sym, ip, in_kernel);  in call_path__findnew()
92 	p = &parent->children.rb_node;  in call_path__findnew()
97 		if (cp->sym == sym && cp->ip == ip)  in call_path__findnew()
100 		if (sym < cp->sym || (sym == cp->sym && ip < cp->ip))  in call_path__findnew()
101 			p = &(*p)->rb_left;  in call_path__findnew()
103 			p = &(*p)->rb_right;  in call_path__findnew()
106 	cp = call_path__new(cpr, parent, sym, ip, in_kernel);  in call_path__findnew()
110 	rb_link_node(&cp->rb_node, node_parent, p);  in call_path__findnew()
111 	rb_insert_color(&cp->rb_node, &parent->children);  in call_path__findnew()