#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" 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") == 0;} static inline int is_no_dso_memory(const char *filename){	return !strcmp(filename, "[stack]") ||	       !strcmp(filename, "[vdso]")  ||	       !strcmp(filename, "[heap]");} void map__init(struct map *self, enum map_type type,	       u64 start, u64 end, u64 pgoff, struct dso *dso){	self->type     = type;	self->start    = start;	self->end      = end;	self->pgoff    = pgoff;	self->dso      = dso;	self->map_ip   = map__map_ip;	self->unmap_ip = map__unmap_ip;	RB_CLEAR_NODE(&self->rb_node);	self->groups   = NULL;	self->referenced = false;} struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,		     u64 pgoff, u32 pid, char *filename,		     enum map_type type){	struct map *self = malloc(sizeof(*self)); 	if (self != NULL) {		char newfilename[PATH_MAX];		struct dso *dso;		int anon, no_dso; 		anon = is_anon_memory(filename);		no_dso = is_no_dso_memory(filename); 		if (anon) {			snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);			filename = newfilename;		} 		dso = __dsos__findnew(dsos__list, filename);		if (dso == NULL)			goto out_delete; 		map__init(self, type, start, start + len, pgoff, dso); 		if (anon || no_dso) {			self->map_ip = self->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, self->type);		}	}	return self;out_delete:	free(self);	return NULL;} void map__delete(struct map *self){	free(self);} void map__fixup_start(struct map *self){	struct rb_root *symbols = &self->dso->symbols[self->type];	struct rb_node *nd = rb_first(symbols);	if (nd != NULL) {		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);		self->start = sym->start;	}} void map__fixup_end(struct map *self){	struct rb_root *symbols = &self->dso->symbols[self->type];	struct rb_node *nd = rb_last(symbols);	if (nd != NULL) {		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);		self->end = sym->end;	}} #define DSO__DELETED "(deleted)" int map__load(struct map *self, symbol_filter_t filter){	const char *name = self->dso->long_name;	int nr; 	if (dso__loaded(self->dso, self->type))		return 0; 	nr = dso__load(self->dso, self, filter);	if (nr < 0) {		if (self->dso->has_build_id) {			char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 			build_id__sprintf(self->dso->build_id,					  sizeof(self->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) {		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);		} 		return -1;	}	/*	 * Only applies to the kernel, as its symtabs aren't relative like the	 * module ones.	 */	if (self->dso->kernel)		map__reloc_vmlinux(self); 	return 0;} struct symbol *map__find_symbol(struct map *self, u64 addr,				symbol_filter_t filter){	if (map__load(self, filter) < 0)		return NULL; 	return dso__find_symbol(self->dso, self->type, addr);} struct symbol *map__find_symbol_by_name(struct map *self, const char *name,					symbol_filter_t filter){	if (map__load(self, filter) < 0)		return NULL; 	if (!dso__sorted_by_name(self->dso, self->type))		dso__sort_by_name(self->dso, self->type); 	return dso__find_symbol_by_name(self->dso, self->type, name);} struct map *map__clone(struct map *self){	struct map *map = malloc(sizeof(*self)); 	if (!map)		return NULL; 	memcpy(map, self, sizeof(*self)); 	return 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 *self, FILE *fp){	return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",		       self->start, self->end, self->pgoff, self->dso->name);} /* * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN. * map->dso->adjust_symbols==1 for ET_EXEC-like cases. */u64 map__rip_2objdump(struct map *map, u64 rip){	u64 addr = map->dso->adjust_symbols ?			map->unmap_ip(map, rip) :	/* RIP -> IP */			rip;	return addr;} u64 map__objdump_2ip(struct map *map, u64 addr){	u64 ip = map->dso->adjust_symbols ?			addr :			map->unmap_ip(map, addr);	/* RIP -> IP */	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;} 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);		} 		rb_erase(&pos->rb_node, root);		/*		 * Now check if we need to create new maps for areas not		 * overlapped by the new map:		 */		if (map->start > pos->start) {			struct map *before = map__clone(pos); 			if (before == NULL) {				err = -ENOMEM;				goto move_map;			} 			before->end = map->start - 1;			map_groups__insert(mg, before);			if (verbose >= 2)				map__fprintf(before, fp);		} 		if (map->end < pos->end) {			struct map *after = map__clone(pos); 			if (after == NULL) {				err = -ENOMEM;				goto move_map;			} 			after->start = map->end + 1;			map_groups__insert(mg, after);			if (verbose >= 2)				map__fprintf(after, fp);		}move_map:		/*		 * If we have references, just move them to a separate list.		 */		if (pos->referenced)			list_add_tail(&pos->node, &mg->removed_maps[map->type]);		else			map__delete(pos); 		if (err)			return err;	} 	return 0;} /* * XXX This should not really _copy_ te maps, but refcount them. */int map_groups__clone(struct map_groups *mg,		      struct map_groups *parent, enum map_type type){	struct rb_node *nd;	for (nd = rb_first(&parent->maps[type]); nd; nd = rb_next(nd)) {		struct map *map = rb_entry(nd, struct map, rb_node);		struct map *new = map__clone(map);		if (new == NULL)			return -ENOMEM;		map_groups__insert(mg, new);	}	return 0;} static u64 map__reloc_map_ip(struct map *map, u64 ip){	return ip + (s64)map->pgoff;} static u64 map__reloc_unmap_ip(struct map *map, u64 ip){	return ip - (s64)map->pgoff;} void map__reloc_vmlinux(struct map *self){	struct kmap *kmap = map__kmap(self);	s64 reloc; 	if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->unrelocated_addr)		return;

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