callchain.c revision e6817ec1d8ab31fc7b01906e305f848542df6413
16acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 26acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Copyright (C) 2009-2011, Frederic Weisbecker <fweisbec@gmail.com> 36acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * 46acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Handle the callchains from the stream in an ad-hoc radix tree and then 56acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * sort them in an rbtree. 66acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * 76acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Using a radix for code path provides a fast retrieval and factorizes 86acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * memory use. Also that lets us use the paths in a hierarchical graph view. 96acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * 106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn */ 116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include <stdlib.h> 136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include <stdio.h> 146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include <stdbool.h> 156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include <errno.h> 166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include <math.h> 176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include "util.h" 196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include "callchain.h" 206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool ip_callchain__valid(struct ip_callchain *chain, 226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const union perf_event *event) 236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn unsigned int chain_size = event->header.size; 256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event; 266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return chain->nr * sizeof(u64) <= chain_size; 276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define chain_for_each_child(child, parent) \ 306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_for_each_entry(child, &parent->children, siblings) 316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define chain_for_each_child_safe(child, next, parent) \ 336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_for_each_entry_safe(child, next, &parent->children, siblings) 346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennrb_insert_callchain(struct rb_root *root, struct callchain_node *chain, 376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn enum chain_mode mode) 386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct rb_node **p = &root->rb_node; 406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct rb_node *parent = NULL; 416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *rnode; 426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 chain_cumul = callchain_cumul_hits(chain); 436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while (*p) { 456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 rnode_cumul; 466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn parent = *p; 486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rnode = rb_entry(parent, struct callchain_node, rb_node); 496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rnode_cumul = callchain_cumul_hits(rnode); 506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn switch (mode) { 526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case CHAIN_FLAT: 536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (rnode->hit < chain->hit) 546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p = &(*p)->rb_left; 556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p = &(*p)->rb_right; 576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case CHAIN_GRAPH_ABS: /* Falldown */ 596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case CHAIN_GRAPH_REL: 606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (rnode_cumul < chain_cumul) 616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p = &(*p)->rb_left; 626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p = &(*p)->rb_right; 646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case CHAIN_NONE: 666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn default: 676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rb_link_node(&chain->rb_node, parent, p); 726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rb_insert_color(&chain->rb_node, root); 736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn__sort_chain_flat(struct rb_root *rb_root, struct callchain_node *node, 776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 min_hit) 786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *child; 806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn chain_for_each_child(child, node) 826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __sort_chain_flat(rb_root, child, min_hit); 836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (node->hit && node->hit >= min_hit) 856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rb_insert_callchain(rb_root, node, CHAIN_FLAT); 866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Once we get every callchains from the stream, we can now 906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * sort them by hit 916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn */ 926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennsort_chain_flat(struct rb_root *rb_root, struct callchain_root *root, 946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 min_hit, struct callchain_param *param __used) 956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __sort_chain_flat(rb_root, &root->node, min_hit); 976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void __sort_chain_graph_abs(struct callchain_node *node, 1006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 min_hit) 1016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *child; 1036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn node->rb_root = RB_ROOT; 1056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn chain_for_each_child(child, node) { 1076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __sort_chain_graph_abs(child, min_hit); 1086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (callchain_cumul_hits(child) >= min_hit) 1096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rb_insert_callchain(&node->rb_root, child, 1106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CHAIN_GRAPH_ABS); 1116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 1156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennsort_chain_graph_abs(struct rb_root *rb_root, struct callchain_root *chain_root, 1166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 min_hit, struct callchain_param *param __used) 1176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __sort_chain_graph_abs(&chain_root->node, min_hit); 1196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rb_root->rb_node = chain_root->node.rb_root.rb_node; 1206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void __sort_chain_graph_rel(struct callchain_node *node, 1236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn double min_percent) 1246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *child; 1266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 min_hit; 1276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn node->rb_root = RB_ROOT; 1296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn min_hit = ceil(node->children_hit * min_percent); 1306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn chain_for_each_child(child, node) { 1326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __sort_chain_graph_rel(child, min_percent); 1336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (callchain_cumul_hits(child) >= min_hit) 1346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rb_insert_callchain(&node->rb_root, child, 1356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CHAIN_GRAPH_REL); 1366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 1406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennsort_chain_graph_rel(struct rb_root *rb_root, struct callchain_root *chain_root, 1416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 min_hit __used, struct callchain_param *param) 1426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __sort_chain_graph_rel(&chain_root->node, param->min_percent / 100.0); 1446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rb_root->rb_node = chain_root->node.rb_root.rb_node; 1456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennint callchain_register_param(struct callchain_param *param) 1486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn switch (param->mode) { 1506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case CHAIN_GRAPH_ABS: 1516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn param->sort = sort_chain_graph_abs; 1526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 1536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case CHAIN_GRAPH_REL: 1546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn param->sort = sort_chain_graph_rel; 1556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 1566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case CHAIN_FLAT: 1576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn param->sort = sort_chain_flat; 1586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 1596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case CHAIN_NONE: 1606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn default: 1616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return -1; 1626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return 0; 1646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 1676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Create a child for a parent. If inherit_children, then the new child 1686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * will become the new parent of it's parent children 1696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn */ 1706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic struct callchain_node * 1716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renncreate_child(struct callchain_node *parent, bool inherit_children) 1726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *new; 1746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new = zalloc(sizeof(*new)); 1766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!new) { 1776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn perror("not enough memory to create child for code path tree"); 1786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return NULL; 1796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new->parent = parent; 1816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn INIT_LIST_HEAD(&new->children); 1826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn INIT_LIST_HEAD(&new->val); 1836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (inherit_children) { 1856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *next; 1866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_splice(&parent->children, &new->children); 1886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn INIT_LIST_HEAD(&parent->children); 1896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn chain_for_each_child(next, new) 1916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn next->parent = new; 1926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_add_tail(&new->siblings, &parent->children); 1946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return new; 1966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 2006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Fill the node with callchain values 2016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn */ 2026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 2036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennfill_node(struct callchain_node *node, struct callchain_cursor *cursor) 2046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 2056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor_node *cursor_node; 2066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn node->val_nr = cursor->nr - cursor->pos; 2086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!node->val_nr) 2096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn pr_warning("Warning: empty node in callchain tree\n"); 2106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cursor_node = callchain_cursor_current(cursor); 2126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while (cursor_node) { 2146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_list *call; 2156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn call = zalloc(sizeof(*call)); 2176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!call) { 2186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn perror("not enough memory for the code path tree"); 2196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return; 2206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 2216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn call->ip = cursor_node->ip; 2226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn call->ms.sym = cursor_node->sym; 2236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn call->ms.map = cursor_node->map; 2246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_add_tail(&call->list, &node->val); 2256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn callchain_cursor_advance(cursor); 2276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cursor_node = callchain_cursor_current(cursor); 2286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 2296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 2306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 2326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennadd_child(struct callchain_node *parent, 2336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor *cursor, 2346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 period) 2356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 2366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *new; 2376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new = create_child(parent, false); 2396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn fill_node(new, cursor); 2406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new->children_hit = 0; 2426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new->hit = period; 2436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 2446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 2466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Split the parent in two parts (a new child is created) and 2476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * give a part of its callchain to the created child. 2486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Then create another child to host the given callchain of new branch 2496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn */ 2506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 2516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennsplit_add_child(struct callchain_node *parent, 2526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor *cursor, 2536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_list *to_split, 2546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 idx_parents, u64 idx_local, u64 period) 2556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 2566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *new; 2576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct list_head *old_tail; 2586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn unsigned int idx_total = idx_parents + idx_local; 2596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* split */ 2616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new = create_child(parent, true); 2626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* split the callchain and move a part to the new child */ 2646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn old_tail = parent->val.prev; 2656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_del_range(&to_split->list, old_tail); 2666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new->val.next = &to_split->list; 2676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new->val.prev = old_tail; 2686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn to_split->list.prev = &new->val; 2696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn old_tail->next = &new->val; 2706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* split the hits */ 2726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new->hit = parent->hit; 2736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new->children_hit = parent->children_hit; 2746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn parent->children_hit = callchain_cumul_hits(new); 2756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new->val_nr = parent->val_nr - idx_local; 2766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn parent->val_nr = idx_local; 2776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* create a new child for the new branch if any */ 2796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (idx_total < cursor->nr) { 2806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn parent->hit = 0; 2816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn add_child(parent, cursor, period); 2826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn parent->children_hit += period; 2836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } else { 2846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn parent->hit = period; 2856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 2866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 2876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic int 2896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennappend_chain(struct callchain_node *root, 2906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor *cursor, 2916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 period); 2926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 2946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennappend_chain_children(struct callchain_node *root, 2956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor *cursor, 2966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 period) 2976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 2986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *rnode; 2996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* lookup in childrens */ 3016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn chain_for_each_child(rnode, root) { 3026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn unsigned int ret = append_chain(rnode, cursor, period); 3036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!ret) 3056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto inc_children_hit; 3066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* nothing in children, add to the current node */ 3086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn add_child(root, cursor, period); 3096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renninc_children_hit: 3116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn root->children_hit += period; 3126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 3136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic int 3156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennappend_chain(struct callchain_node *root, 3166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor *cursor, 3176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 period) 3186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 3196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor_node *curr_snap = cursor->curr; 3206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_list *cnode; 3216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 start = cursor->pos; 3226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bool found = false; 3236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 matches; 3246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* 3266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Lookup in the current node 3276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * If we have a symbol, then compare the start to match 3286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * anywhere inside a function. 3296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn */ 3306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_for_each_entry(cnode, &root->val, list) { 3316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor_node *node; 3326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct symbol *sym; 3336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn node = callchain_cursor_current(cursor); 3356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!node) 3366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 3376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn sym = node->sym; 3396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (cnode->ms.sym && sym) { 3416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (cnode->ms.sym->start != sym->start) 3426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 3436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } else if (cnode->ip != node->ip) 3446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 3456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!found) 3476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn found = true; 3486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn callchain_cursor_advance(cursor); 3506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* matches not, relay on the parent */ 3536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!found) { 3546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cursor->curr = curr_snap; 3556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cursor->pos = start; 3566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return -1; 3576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn matches = cursor->pos - start; 3606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* we match only a part of the node. Split it and add the new chain */ 3626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (matches < root->val_nr) { 3636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn split_add_child(root, cursor, cnode, start, matches, period); 3646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return 0; 3656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* we match 100% of the path, increment the hit */ 3686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (matches == root->val_nr && cursor->pos == cursor->nr) { 3696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn root->hit += period; 3706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return 0; 3716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* We match the node and still have a part remaining */ 3746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn append_chain_children(root, cursor, period); 3756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return 0; 3776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 3786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennint callchain_append(struct callchain_root *root, 3806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor *cursor, 3816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 period) 3826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 3836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!cursor->nr) 3846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return 0; 3856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn callchain_cursor_commit(cursor); 3876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn append_chain_children(&root->node, cursor, period); 3896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (cursor->nr > root->max_depth) 3916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn root->max_depth = cursor->nr; 3926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return 0; 3946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 3956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic int 3976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennmerge_chain_branch(struct callchain_cursor *cursor, 3986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *dst, struct callchain_node *src) 3996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 4006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor_node **old_last = cursor->last; 4016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_node *child, *next_child; 4026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_list *list, *next_list; 4036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int old_pos = cursor->nr; 4046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int err = 0; 4056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_for_each_entry_safe(list, next_list, &src->val, list) { 4076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn callchain_cursor_append(cursor, list->ip, 4086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list->ms.map, list->ms.sym); 4096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_del(&list->list); 4106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn free(list); 4116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (src->hit) { 4146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn callchain_cursor_commit(cursor); 4156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn append_chain_children(dst, cursor, src->hit); 4166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn chain_for_each_child_safe(child, next_child, src) { 4196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn err = merge_chain_branch(cursor, dst, child); 4206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (err) 4216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 4226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn list_del(&child->siblings); 4246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn free(child); 4256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cursor->nr = old_pos; 4286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cursor->last = old_last; 4296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return err; 4316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 4326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennint callchain_merge(struct callchain_cursor *cursor, 4346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_root *dst, struct callchain_root *src) 4356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 4366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return merge_chain_branch(cursor, &dst->node, &src->node); 4376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 4386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennint callchain_cursor_append(struct callchain_cursor *cursor, 4406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn u64 ip, struct map *map, struct symbol *sym) 4416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 4426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct callchain_cursor_node *node = *cursor->last; 4436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!node) { 4456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn node = calloc(sizeof(*node), 1); 4466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (!node) 4476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return -ENOMEM; 4486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *cursor->last = node; 4506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn node->ip = ip; 4536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn node->map = map; 4546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn node->sym = sym; 4556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cursor->nr++; 4576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cursor->last = &node->next; 4596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return 0; 4616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 4626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn