1 files changed, 0 insertions, 574 deletions

diff --git a/Documentation/perf_counter/util/symbol.c b/Documentation/perf_counter/util/symbol.c
deleted file mode 100644
index 23f4f7b3b83d..000000000000
--- a/Documentation/perf_counter/util/symbol.c
+++ /dev/null
@@ -1,574 +0,0 @@
-#include "util.h"
-#include "../perf.h"
-#include "string.h"
-#include "symbol.h"
-
-#include <libelf.h>
-#include <gelf.h>
-#include <elf.h>
-
-const char *sym_hist_filter;
-
-static struct symbol *symbol__new(uint64_t start, uint64_t len,
-				  const char *name, unsigned int priv_size,
-				  uint64_t obj_start, int verbose)
-{
-	size_t namelen = strlen(name) + 1;
-	struct symbol *self = calloc(1, priv_size + sizeof(*self) + namelen);
-
-	if (!self)
-		return NULL;
-
-	if (verbose >= 2)
-		printf("new symbol: %016Lx [%08lx]: %s, hist: %p, obj_start: %p\n",
-			(__u64)start, len, name, self->hist, (void *)obj_start);
-
-	self->obj_start= obj_start;
-	self->hist = NULL;
-	self->hist_sum = 0;
-
-	if (sym_hist_filter && !strcmp(name, sym_hist_filter))
-		self->hist = calloc(sizeof(__u64), len);
-
-	if (priv_size) {
-		memset(self, 0, priv_size);
-		self = ((void *)self) + priv_size;
-	}
-	self->start = start;
-	self->end   = start + len - 1;
-	memcpy(self->name, name, namelen);
-
-	return self;
-}
-
-static void symbol__delete(struct symbol *self, unsigned int priv_size)
-{
-	free(((void *)self) - priv_size);
-}
-
-static size_t symbol__fprintf(struct symbol *self, FILE *fp)
-{
-	return fprintf(fp, " %llx-%llx %s\n",
-		       self->start, self->end, self->name);
-}
-
-struct dso *dso__new(const char *name, unsigned int sym_priv_size)
-{
-	struct dso *self = malloc(sizeof(*self) + strlen(name) + 1);
-
-	if (self != NULL) {
-		strcpy(self->name, name);
-		self->syms = RB_ROOT;
-		self->sym_priv_size = sym_priv_size;
-		self->find_symbol = dso__find_symbol;
-	}
-
-	return self;
-}
-
-static void dso__delete_symbols(struct dso *self)
-{
-	struct symbol *pos;
-	struct rb_node *next = rb_first(&self->syms);
-
-	while (next) {
-		pos = rb_entry(next, struct symbol, rb_node);
-		next = rb_next(&pos->rb_node);
-		rb_erase(&pos->rb_node, &self->syms);
-		symbol__delete(pos, self->sym_priv_size);
-	}
-}
-
-void dso__delete(struct dso *self)
-{
-	dso__delete_symbols(self);
-	free(self);
-}
-
-static void dso__insert_symbol(struct dso *self, struct symbol *sym)
-{
-	struct rb_node **p = &self->syms.rb_node;
-	struct rb_node *parent = NULL;
-	const uint64_t ip = sym->start;
-	struct symbol *s;
-
-	while (*p != NULL) {
-		parent = *p;
-		s = rb_entry(parent, struct symbol, rb_node);
-		if (ip < s->start)
-			p = &(*p)->rb_left;
-		else
-			p = &(*p)->rb_right;
-	}
-	rb_link_node(&sym->rb_node, parent, p);
-	rb_insert_color(&sym->rb_node, &self->syms);
-}
-
-struct symbol *dso__find_symbol(struct dso *self, uint64_t ip)
-{
-	struct rb_node *n;
-
-	if (self == NULL)
-		return NULL;
-
-	n = self->syms.rb_node;
-
-	while (n) {
-		struct symbol *s = rb_entry(n, struct symbol, rb_node);
-
-		if (ip < s->start)
-			n = n->rb_left;
-		else if (ip > s->end)
-			n = n->rb_right;
-		else
-			return s;
-	}
-
-	return NULL;
-}
-
-size_t dso__fprintf(struct dso *self, FILE *fp)
-{
-	size_t ret = fprintf(fp, "dso: %s\n", self->name);
-
-	struct rb_node *nd;
-	for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) {
-		struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
-		ret += symbol__fprintf(pos, fp);
-	}
-
-	return ret;
-}
-
-static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int verbose)
-{
-	struct rb_node *nd, *prevnd;
-	char *line = NULL;
-	size_t n;
-	FILE *file = fopen("/proc/kallsyms", "r");
-
-	if (file == NULL)
-		goto out_failure;
-
-	while (!feof(file)) {
-		__u64 start;
-		struct symbol *sym;
-		int line_len, len;
-		char symbol_type;
-
-		line_len = getline(&line, &n, file);
-		if (line_len < 0)
-			break;
-
-		if (!line)
-			goto out_failure;
-
-		line[--line_len] = '\0'; /* \n */
-
-		len = hex2u64(line, &start);
-
-		len++;
-		if (len + 2 >= line_len)
-			continue;
-
-		symbol_type = toupper(line[len]);
-		/*
-		 * We're interested only in code ('T'ext)
-		 */
-		if (symbol_type != 'T' && symbol_type != 'W')
-			continue;
-		/*
-		 * Well fix up the end later, when we have all sorted.
-		 */
-		sym = symbol__new(start, 0xdead, line + len + 2,
-				  self->sym_priv_size, 0, verbose);
-
-		if (sym == NULL)
-			goto out_delete_line;
-
-		if (filter && filter(self, sym))
-			symbol__delete(sym, self->sym_priv_size);
-		else
-			dso__insert_symbol(self, sym);
-	}
-
-	/*
-	 * Now that we have all sorted out, just set the ->end of all
-	 * symbols
-	 */
-	prevnd = rb_first(&self->syms);
-
-	if (prevnd == NULL)
-		goto out_delete_line;
-
-	for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
-		struct symbol *prev = rb_entry(prevnd, struct symbol, rb_node),
-			      *curr = rb_entry(nd, struct symbol, rb_node);
-
-		prev->end = curr->start - 1;
-		prevnd = nd;
-	}
-
-	free(line);
-	fclose(file);
-
-	return 0;
-
-out_delete_line:
-	free(line);
-out_failure:
-	return -1;
-}
-
-/**
- * elf_symtab__for_each_symbol - iterate thru all the symbols
- *
- * @self: struct elf_symtab instance to iterate
- * @index: uint32_t index
- * @sym: GElf_Sym iterator
- */
-#define elf_symtab__for_each_symbol(syms, nr_syms, index, sym) \
-	for (index = 0, gelf_getsym(syms, index, &sym);\
-	     index < nr_syms; \
-	     index++, gelf_getsym(syms, index, &sym))
-
-static inline uint8_t elf_sym__type(const GElf_Sym *sym)
-{
-	return GELF_ST_TYPE(sym->st_info);
-}
-
-static inline int elf_sym__is_function(const GElf_Sym *sym)
-{
-	return elf_sym__type(sym) == STT_FUNC &&
-	       sym->st_name != 0 &&
-	       sym->st_shndx != SHN_UNDEF &&
-	       sym->st_size != 0;
-}
-
-static inline const char *elf_sym__name(const GElf_Sym *sym,
-					const Elf_Data *symstrs)
-{
-	return symstrs->d_buf + sym->st_name;
-}
-
-static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
-				    GElf_Shdr *shp, const char *name,
-				    size_t *index)
-{
-	Elf_Scn *sec = NULL;
-	size_t cnt = 1;
-
-	while ((sec = elf_nextscn(elf, sec)) != NULL) {
-		char *str;
-
-		gelf_getshdr(sec, shp);
-		str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
-		if (!strcmp(name, str)) {
-			if (index)
-				*index = cnt;
-			break;
-		}
-		++cnt;
-	}
-
-	return sec;
-}
-
-#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
-	for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
-	     idx < nr_entries; \
-	     ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
-
-#define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
-	for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
-	     idx < nr_entries; \
-	     ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
-
-static int dso__synthesize_plt_symbols(struct  dso *self, Elf *elf,
-				       GElf_Ehdr *ehdr, Elf_Scn *scn_dynsym,
-				       GElf_Shdr *shdr_dynsym,
-				       size_t dynsym_idx, int verbose)
-{
-	uint32_t nr_rel_entries, idx;
-	GElf_Sym sym;
-	__u64 plt_offset;
-	GElf_Shdr shdr_plt;
-	struct symbol *f;
-	GElf_Shdr shdr_rel_plt;
-	Elf_Data *reldata, *syms, *symstrs;
-	Elf_Scn *scn_plt_rel, *scn_symstrs;
-	char sympltname[1024];
-	int nr = 0, symidx;
-
-	scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
-					  ".rela.plt", NULL);
-	if (scn_plt_rel == NULL) {
-		scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
-						  ".rel.plt", NULL);
-		if (scn_plt_rel == NULL)
-			return 0;
-	}
-
-	if (shdr_rel_plt.sh_link != dynsym_idx)
-		return 0;
-
-	if (elf_section_by_name(elf, ehdr, &shdr_plt, ".plt", NULL) == NULL)
-		return 0;
-
-	/*
-	 * Fetch the relocation section to find the indexes to the GOT
-	 * and the symbols in the .dynsym they refer to.
-	 */
-	reldata = elf_getdata(scn_plt_rel, NULL);
-	if (reldata == NULL)
-		return -1;
-
-	syms = elf_getdata(scn_dynsym, NULL);
-	if (syms == NULL)
-		return -1;
-
-	scn_symstrs = elf_getscn(elf, shdr_dynsym->sh_link);
-	if (scn_symstrs == NULL)
-		return -1;
-
-	symstrs = elf_getdata(scn_symstrs, NULL);
-	if (symstrs == NULL)
-		return -1;
-
-	nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
-	plt_offset = shdr_plt.sh_offset;
-
-	if (shdr_rel_plt.sh_type == SHT_RELA) {
-		GElf_Rela pos_mem, *pos;
-
-		elf_section__for_each_rela(reldata, pos, pos_mem, idx,
-					   nr_rel_entries) {
-			symidx = GELF_R_SYM(pos->r_info);
-			plt_offset += shdr_plt.sh_entsize;
-			gelf_getsym(syms, symidx, &sym);
-			snprintf(sympltname, sizeof(sympltname),
-				 "%s@plt", elf_sym__name(&sym, symstrs));
-
-			f = symbol__new(plt_offset, shdr_plt.sh_entsize,
-					sympltname, self->sym_priv_size, 0, verbose);
-			if (!f)
-				return -1;
-
-			dso__insert_symbol(self, f);
-			++nr;
-		}
-	} else if (shdr_rel_plt.sh_type == SHT_REL) {
-		GElf_Rel pos_mem, *pos;
-		elf_section__for_each_rel(reldata, pos, pos_mem, idx,
-					  nr_rel_entries) {
-			symidx = GELF_R_SYM(pos->r_info);
-			plt_offset += shdr_plt.sh_entsize;
-			gelf_getsym(syms, symidx, &sym);
-			snprintf(sympltname, sizeof(sympltname),
-				 "%s@plt", elf_sym__name(&sym, symstrs));
-
-			f = symbol__new(plt_offset, shdr_plt.sh_entsize,
-					sympltname, self->sym_priv_size, 0, verbose);
-			if (!f)
-				return -1;
-
-			dso__insert_symbol(self, f);
-			++nr;
-		}
-	} else {
-		/*
-		 * TODO: There are still one more shdr_rel_plt.sh_type
-		 * I have to investigate, but probably should be ignored.
-		 */
-	}
-
-	return nr;
-}
-
-static int dso__load_sym(struct dso *self, int fd, const char *name,
-			 symbol_filter_t filter, int verbose)
-{
-	Elf_Data *symstrs;
-	uint32_t nr_syms;
-	int err = -1;
-	uint32_t index;
-	GElf_Ehdr ehdr;
-	GElf_Shdr shdr;
-	Elf_Data *syms;
-	GElf_Sym sym;
-	Elf_Scn *sec, *sec_dynsym;
-	Elf *elf;
-	size_t dynsym_idx;
-	int nr = 0;
-
-	elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
-	if (elf == NULL) {
-		if (verbose)
-			fprintf(stderr, "%s: cannot read %s ELF file.\n",
-				__func__, name);
-		goto out_close;
-	}
-
-	if (gelf_getehdr(elf, &ehdr) == NULL) {
-		if (verbose)
-			fprintf(stderr, "%s: cannot get elf header.\n", __func__);
-		goto out_elf_end;
-	}
-
-	/*
-	 * We need to check if we have a .dynsym, so that we can handle the
-	 * .plt, synthesizing its symbols, that aren't on the symtabs (be it
-	 * .dynsym or .symtab)
-	 */
-	sec_dynsym = elf_section_by_name(elf, &ehdr, &shdr,
-					 ".dynsym", &dynsym_idx);
-	if (sec_dynsym != NULL) {
-		nr = dso__synthesize_plt_symbols(self, elf, &ehdr,
-						 sec_dynsym, &shdr,
-						 dynsym_idx, verbose);
-		if (nr < 0)
-			goto out_elf_end;
-	}
-
-	/*
-	 * But if we have a full .symtab (that is a superset of .dynsym) we
-	 * should add the symbols not in the .dynsyn
-	 */
-	sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
-	if (sec == NULL) {
-		if (sec_dynsym == NULL)
-			goto out_elf_end;
-
-		sec = sec_dynsym;
-		gelf_getshdr(sec, &shdr);
-	}
-
-	syms = elf_getdata(sec, NULL);
-	if (syms == NULL)
-		goto out_elf_end;
-
-	sec = elf_getscn(elf, shdr.sh_link);
-	if (sec == NULL)
-		goto out_elf_end;
-
-	symstrs = elf_getdata(sec, NULL);
-	if (symstrs == NULL)
-		goto out_elf_end;
-
-	nr_syms = shdr.sh_size / shdr.sh_entsize;
-
-	elf_symtab__for_each_symbol(syms, nr_syms, index, sym) {
-		struct symbol *f;
-		uint64_t obj_start;
-
-		if (!elf_sym__is_function(&sym))
-			continue;
-
-		sec = elf_getscn(elf, sym.st_shndx);
-		if (!sec)
-			goto out_elf_end;
-
-		gelf_getshdr(sec, &shdr);
-		obj_start = sym.st_value;
-
-		sym.st_value -= shdr.sh_addr - shdr.sh_offset;
-
-		f = symbol__new(sym.st_value, sym.st_size,
-				elf_sym__name(&sym, symstrs),
-				self->sym_priv_size, obj_start, verbose);
-		if (!f)
-			goto out_elf_end;
-
-		if (filter && filter(self, f))
-			symbol__delete(f, self->sym_priv_size);
-		else {
-			dso__insert_symbol(self, f);
-			nr++;
-		}
-	}
-
-	err = nr;
-out_elf_end:
-	elf_end(elf);
-out_close:
-	return err;
-}
-
-int dso__load(struct dso *self, symbol_filter_t filter, int verbose)
-{
-	int size = strlen(self->name) + sizeof("/usr/lib/debug%s.debug");
-	char *name = malloc(size);
-	int variant = 0;
-	int ret = -1;
-	int fd;
-
-	if (!name)
-		return -1;
-
-more:
-	do {
-		switch (variant) {
-		case 0: /* Fedora */
-			snprintf(name, size, "/usr/lib/debug%s.debug", self->name);
-			break;
-		case 1: /* Ubuntu */
-			snprintf(name, size, "/usr/lib/debug%s", self->name);
-			break;
-		case 2: /* Sane people */
-			snprintf(name, size, "%s", self->name);
-			break;
-
-		default:
-			goto out;
-		}
-		variant++;
-
-		fd = open(name, O_RDONLY);
-	} while (fd < 0);
-
-	ret = dso__load_sym(self, fd, name, filter, verbose);
-	close(fd);
-
-	/*
-	 * Some people seem to have debuginfo files _WITHOUT_ debug info!?!?
-	 */
-	if (!ret)
-		goto more;
-
-out:
-	free(name);
-	return ret;
-}
-
-static int dso__load_vmlinux(struct dso *self, const char *vmlinux,
-			     symbol_filter_t filter, int verbose)
-{
-	int err, fd = open(vmlinux, O_RDONLY);
-
-	if (fd < 0)
-		return -1;
-
-	err = dso__load_sym(self, fd, vmlinux, filter, verbose);
-	close(fd);
-
-	return err;
-}
-
-int dso__load_kernel(struct dso *self, const char *vmlinux,
-		     symbol_filter_t filter, int verbose)
-{
-	int err = -1;
-
-	if (vmlinux)
-		err = dso__load_vmlinux(self, vmlinux, filter, verbose);
-
-	if (err)
-		err = dso__load_kallsyms(self, filter, verbose);
-
-	return err;
-}
-
-void symbol__init(void)
-{
-	elf_version(EV_CURRENT);
-}