#include "symbol.h"#include <errno.h>#include <inttypes.h>#include <limits.h>#include <stdlib.h>#include <string.h>#include <stdio.h>#include <unistd.h>#include "map.h"#include "thread.h"#include "strlist.h"#include "vdso.h"#include "build-id.h"#include <linux/string.h> const char *map_type__name[MAP__NR_TYPES] = {	[MAP__FUNCTION] = "Functions",	[MAP__VARIABLE] = "Variables",}; static inline int is_anon_memory(const char *filename){	return !strcmp(filename, "//anon") ||	       !strcmp(filename, "/dev/zero (deleted)") ||	       !strcmp(filename, "/anon_hugepage (deleted)");} static inline int is_no_dso_memory(const char *filename){	return !strncmp(filename, "[stack", 6) ||	       !strcmp(filename, "[heap]");} void map__init(struct map *map, enum map_type type,	       u64 start, u64 end, u64 pgoff, struct dso *dso){	map->type     = type;	map->start    = start;	map->end      = end;	map->pgoff    = pgoff;	map->dso      = dso;	map->map_ip   = map__map_ip;	map->unmap_ip = map__unmap_ip;	RB_CLEAR_NODE(&map->rb_node);	map->groups   = NULL;	map->referenced = false;	map->erange_warned = false;} struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,		     u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,		     u64 ino_gen, char *filename,		     enum map_type type){	struct map *map = malloc(sizeof(*map)); 	if (map != NULL) {		char newfilename[PATH_MAX];		struct dso *dso;		int anon, no_dso, vdso; 		anon = is_anon_memory(filename);		vdso = is_vdso_map(filename);		no_dso = is_no_dso_memory(filename); 		map->maj = d_maj;		map->min = d_min;		map->ino = ino;		map->ino_generation = ino_gen; 		if (anon) {			snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);			filename = newfilename;		} 		if (vdso) {			pgoff = 0;			dso = vdso__dso_findnew(dsos__list);		} else			dso = __dsos__findnew(dsos__list, filename); 		if (dso == NULL)			goto out_delete; 		map__init(map, type, start, start + len, pgoff, dso); 		if (anon || no_dso) {			map->map_ip = map->unmap_ip = identity__map_ip; 			/*			 * Set memory without DSO as loaded. All map__find_*			 * functions still return NULL, and we avoid the			 * unnecessary map__load warning.			 */			if (no_dso)				dso__set_loaded(dso, map->type);		}	}	return map;out_delete:	free(map);	return NULL;} /* * Constructor variant for modules (where we know from /proc/modules where * they are loaded) and for vmlinux, where only after we load all the * symbols we'll know where it starts and ends. */struct map *map__new2(u64 start, struct dso *dso, enum map_type type){	struct map *map = calloc(1, (sizeof(*map) +				     (dso->kernel ? sizeof(struct kmap) : 0)));	if (map != NULL) {		/*		 * ->end will be filled after we load all the symbols		 */		map__init(map, type, start, 0, 0, dso);	} 	return map;} void map__delete(struct map *map){	free(map);} void map__fixup_start(struct map *map){	struct rb_root *symbols = &map->dso->symbols[map->type];	struct rb_node *nd = rb_first(symbols);	if (nd != NULL) {		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);		map->start = sym->start;	}} void map__fixup_end(struct map *map){	struct rb_root *symbols = &map->dso->symbols[map->type];	struct rb_node *nd = rb_last(symbols);	if (nd != NULL) {		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);		map->end = sym->end;	}} #define DSO__DELETED "(deleted)" int map__load(struct map *map, symbol_filter_t filter){	const char *name = map->dso->long_name;	int nr; 	if (dso__loaded(map->dso, map->type))		return 0; 	nr = dso__load(map->dso, map, filter);	if (nr < 0) {		if (map->dso->has_build_id) {			char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 			build_id__sprintf(map->dso->build_id,					  sizeof(map->dso->build_id),					  sbuild_id);			pr_warning("%s with build id %s not found",				   name, sbuild_id);		} else			pr_warning("Failed to open %s", name); 		pr_warning(", continuing without symbols\n");		return -1;	} else if (nr == 0) {#ifdef HAVE_LIBELF_SUPPORT		const size_t len = strlen(name);		const size_t real_len = len - sizeof(DSO__DELETED); 		if (len > sizeof(DSO__DELETED) &&		    strcmp(name + real_len + 1, DSO__DELETED) == 0) {			pr_warning("%.*s was updated (is prelink enabled?). "				"Restart the long running apps that use it!\n",				   (int)real_len, name);		} else {			pr_warning("no symbols found in %s, maybe install "				   "a debug package?\n", name);		}#endif		return -1;	} 	return 0;} struct symbol *map__find_symbol(struct map *map, u64 addr,				symbol_filter_t filter){	if (map__load(map, filter) < 0)		return NULL; 	return dso__find_symbol(map->dso, map->type, addr);} struct symbol *map__find_symbol_by_name(struct map *map, const char *name,					symbol_filter_t filter){	if (map__load(map, filter) < 0)		return NULL; 	if (!dso__sorted_by_name(map->dso, map->type))		dso__sort_by_name(map->dso, map->type); 	return dso__find_symbol_by_name(map->dso, map->type, name);} struct map *map__clone(struct map *map){	return memdup(map, sizeof(*map));} int map__overlap(struct map *l, struct map *r){	if (l->start > r->start) {		struct map *t = l;		l = r;		r = t;	} 	if (l->end > r->start)		return 1; 	return 0;} size_t map__fprintf(struct map *map, FILE *fp){	return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",		       map->start, map->end, map->pgoff, map->dso->name);} size_t map__fprintf_dsoname(struct map *map, FILE *fp){	const char *dsoname = "[unknown]"; 	if (map && map->dso && (map->dso->name || map->dso->long_name)) {		if (symbol_conf.show_kernel_path && map->dso->long_name)			dsoname = map->dso->long_name;		else if (map->dso->name)			dsoname = map->dso->name;	} 	return fprintf(fp, "%s", dsoname);} /** * map__rip_2objdump - convert symbol start address to objdump address. * @map: memory map * @rip: symbol start address * * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN. * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is * relative to section start. * * Return: Address suitable for passing to "objdump --start-address=" */u64 map__rip_2objdump(struct map *map, u64 rip){	if (!map->dso->adjust_symbols)		return rip; 	if (map->dso->rel)		return rip - map->pgoff; 	return map->unmap_ip(map, rip);} /** * map__objdump_2mem - convert objdump address to a memory address. * @map: memory map * @ip: objdump address * * Closely related to map__rip_2objdump(), this function takes an address from * objdump and converts it to a memory address.  Note this assumes that @map * contains the address.  To be sure the result is valid, check it forwards * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip * * Return: Memory address. */u64 map__objdump_2mem(struct map *map, u64 ip){	if (!map->dso->adjust_symbols)		return map->unmap_ip(map, ip); 	if (map->dso->rel)		return map->unmap_ip(map, ip + map->pgoff); 	return ip;} void map_groups__init(struct map_groups *mg){	int i;	for (i = 0; i < MAP__NR_TYPES; ++i) {		mg->maps[i] = RB_ROOT;		INIT_LIST_HEAD(&mg->removed_maps[i]);	}	mg->machine = NULL;} static void maps__delete(struct rb_root *maps){	struct rb_node *next = rb_first(maps); 	while (next) {		struct map *pos = rb_entry(next, struct map, rb_node); 		next = rb_next(&pos->rb_node);		rb_erase(&pos->rb_node, maps);		map__delete(pos);	}} static void maps__delete_removed(struct list_head *maps){	struct map *pos, *n; 	list_for_each_entry_safe(pos, n, maps, node) {		list_del(&pos->node);		map__delete(pos);	}} void map_groups__exit(struct map_groups *mg){	int i; 	for (i = 0; i < MAP__NR_TYPES; ++i) {		maps__delete(&mg->maps[i]);		maps__delete_removed(&mg->removed_maps[i]);	}} void map_groups__flush(struct map_groups *mg){	int type; 	for (type = 0; type < MAP__NR_TYPES; type++) {		struct rb_root *root = &mg->maps[type];		struct rb_node *next = rb_first(root); 		while (next) {			struct map *pos = rb_entry(next, struct map, rb_node);			next = rb_next(&pos->rb_node);			rb_erase(&pos->rb_node, root);			/*			 * We may have references to this map, for			 * instance in some hist_entry instances, so			 * just move them to a separate list.			 */			list_add_tail(&pos->node, &mg->removed_maps[pos->type]);		}	}} struct symbol *map_groups__find_symbol(struct map_groups *mg,				       enum map_type type, u64 addr,				       struct map **mapp,				       symbol_filter_t filter){	struct map *map = map_groups__find(mg, type, addr); 	if (map != NULL) {		if (mapp != NULL)			*mapp = map;		return map__find_symbol(map, map->map_ip(map, addr), filter);	} 	return NULL;} struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,					       enum map_type type,					       const char *name,					       struct map **mapp,					       symbol_filter_t filter){	struct rb_node *nd; 	for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) {		struct map *pos = rb_entry(nd, struct map, rb_node);		struct symbol *sym = map__find_symbol_by_name(pos, name, filter); 		if (sym == NULL)			continue;		if (mapp != NULL)			*mapp = pos;		return sym;	} 	return NULL;} int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter){	if (ams->addr < ams->map->start || ams->addr > ams->map->end) {		if (ams->map->groups == NULL)			return -1;		ams->map = map_groups__find(ams->map->groups, ams->map->type,					    ams->addr);		if (ams->map == NULL)			return -1;	} 	ams->al_addr = ams->map->map_ip(ams->map, ams->addr);	ams->sym = map__find_symbol(ams->map, ams->al_addr, filter); 	return ams->sym ? 0 : -1;} size_t __map_groups__fprintf_maps(struct map_groups *mg,				  enum map_type type, int verbose, FILE *fp){	size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);	struct rb_node *nd; 	for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) {		struct map *pos = rb_entry(nd, struct map, rb_node);		printed += fprintf(fp, "Map:");		printed += map__fprintf(pos, fp);		if (verbose > 2) {			printed += dso__fprintf(pos->dso, type, fp);			printed += fprintf(fp, "--\n");		}	} 	return printed;} size_t map_groups__fprintf_maps(struct map_groups *mg, int verbose, FILE *fp){	size_t printed = 0, i;	for (i = 0; i < MAP__NR_TYPES; ++i)		printed += __map_groups__fprintf_maps(mg, i, verbose, fp);	return printed;} static size_t __map_groups__fprintf_removed_maps(struct map_groups *mg,						 enum map_type type,						 int verbose, FILE *fp){	struct map *pos;	size_t printed = 0; 	list_for_each_entry(pos, &mg->removed_maps[type], node) {		printed += fprintf(fp, "Map:");		printed += map__fprintf(pos, fp);		if (verbose > 1) {			printed += dso__fprintf(pos->dso, type, fp);			printed += fprintf(fp, "--\n");		}	}	return printed;} static size_t map_groups__fprintf_removed_maps(struct map_groups *mg,					       int verbose, FILE *fp){	size_t printed = 0, i;	for (i = 0; i < MAP__NR_TYPES; ++i)		printed += __map_groups__fprintf_removed_maps(mg, i, verbose, fp);	return printed;} size_t map_groups__fprintf(struct map_groups *mg, int verbose, FILE *fp){	size_t printed = map_groups__fprintf_maps(mg, verbose, fp);	printed += fprintf(fp, "Removed maps:\n");	return printed + map_groups__fprintf_removed_maps(mg, verbose, fp);} int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,				   int verbose, FILE *fp){	struct rb_root *root = &mg->maps[map->type];	struct rb_node *next = rb_first(root);	int err = 0; 	while (next) {		struct map *pos = rb_entry(next, struct map, rb_node);		next = rb_next(&pos->rb_node); 		if (!map__overlap(pos, map))			continue; 		if (verbose >= 2) {			fputs("overlapping maps:\n", fp);			map__fprintf(map, fp);			map__fprintf(pos, fp);		} 

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