^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * call-path.h: Manipulate a tree data structure containing function call paths
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2014, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/rbtree.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/zalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "call-path.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) static void call_path__init(struct call_path *cp, struct call_path *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct symbol *sym, u64 ip, bool in_kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) cp->parent = parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) cp->sym = sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) cp->ip = sym ? 0 : ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) cp->db_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) cp->in_kernel = in_kernel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) RB_CLEAR_NODE(&cp->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) cp->children = RB_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct call_path_root *call_path_root__new(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct call_path_root *cpr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) cpr = zalloc(sizeof(struct call_path_root));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) if (!cpr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) call_path__init(&cpr->call_path, NULL, NULL, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) INIT_LIST_HEAD(&cpr->blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return cpr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) void call_path_root__free(struct call_path_root *cpr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct call_path_block *pos, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) list_for_each_entry_safe(pos, n, &cpr->blocks, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) list_del_init(&pos->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) free(pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) free(cpr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static struct call_path *call_path__new(struct call_path_root *cpr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct call_path *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct symbol *sym, u64 ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) bool in_kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct call_path_block *cpb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct call_path *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) size_t n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (cpr->next < cpr->sz) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) cpb = list_last_entry(&cpr->blocks, struct call_path_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) cpb = zalloc(sizeof(struct call_path_block));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (!cpb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) list_add_tail(&cpb->node, &cpr->blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) cpr->sz += CALL_PATH_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) n = cpr->next++ & CALL_PATH_BLOCK_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) cp = &cpb->cp[n];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) call_path__init(cp, parent, sym, ip, in_kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct call_path *call_path__findnew(struct call_path_root *cpr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct call_path *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct symbol *sym, u64 ip, u64 ks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct rb_node **p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct rb_node *node_parent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct call_path *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) bool in_kernel = ip >= ks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (!parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return call_path__new(cpr, parent, sym, ip, in_kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) p = &parent->children.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) while (*p != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) node_parent = *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) cp = rb_entry(node_parent, struct call_path, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (cp->sym == sym && cp->ip == ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (sym < cp->sym || (sym == cp->sym && ip < cp->ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) p = &(*p)->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) p = &(*p)->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) cp = call_path__new(cpr, parent, sym, ip, in_kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!cp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) rb_link_node(&cp->rb_node, node_parent, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) rb_insert_color(&cp->rb_node, &parent->children);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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