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perf symbols: Store the symbol binding 

So that tools that wan't to act only on a subset of (weak, global,
local) symbols can do so, such as the upcoming uprobes support in 'perf
probe'.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-08-05 12:59:47 -03:00
parent fc9ea5a1e5
commit c408fedfc4
2 changed files with 23 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
tools/perf/util/symbol.c
View File

@ -131,7 +131,8 @@ static void map_groups__fixup_end(struct map_groups *self)
__map_groups__fixup_end(self, i);
}
static struct symbol *symbol__new(u64 start, u64 len, const char *name)
static struct symbol *symbol__new(u64 start, u64 len, u8 binding,
const char *name)
{
size_t namelen = strlen(name) + 1;
struct symbol *self = calloc(1, (symbol_conf.priv_size +
@ -144,6 +145,7 @@ static struct symbol *symbol__new(u64 start, u64 len, const char *name)
self->start = start;
self->end = len ? start + len - 1 : start;
self->binding = binding;
self->namelen = namelen - 1;
pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
@ -160,8 +162,11 @@ void symbol__delete(struct symbol *self)
static size_t symbol__fprintf(struct symbol *self, FILE *fp)
{
return fprintf(fp, " %llx-%llx %s\n",
self->start, self->end, self->name);
return fprintf(fp, " %llx-%llx %c %s\n",
self->start, self->end,
self->binding == STB_GLOBAL ? 'g' :
self->binding == STB_LOCAL ? 'l' : 'w',
self->name);
}
void dso__set_long_name(struct dso *self, char *name)
@ -453,6 +458,14 @@ struct process_kallsyms_args {
struct dso *dso;
};
static u8 kallsyms2elf_type(char type)
{
if (type == 'W')
return STB_WEAK;
return isupper(type) ? STB_GLOBAL : STB_LOCAL;
}
static int map__process_kallsym_symbol(void *arg, const char *name,
char type, u64 start)
{
@ -466,7 +479,7 @@ static int map__process_kallsym_symbol(void *arg, const char *name,
/*
* Will fix up the end later, when we have all symbols sorted.
*/
sym = symbol__new(start, 0, name);
sym = symbol__new(start, 0, kallsyms2elf_type(type), name);
if (sym == NULL)
return -ENOMEM;
@ -661,7 +674,7 @@ static int dso__load_perf_map(struct dso *self, struct map *map,
if (len + 2 >= line_len)
continue;
sym = symbol__new(start, size, line + len);
sym = symbol__new(start, size, STB_GLOBAL, line + len);
if (sym == NULL)
goto out_delete_line;
@ -873,7 +886,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
"%s@plt", elf_sym__name(&sym, symstrs));
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
sympltname);
STB_GLOBAL, sympltname);
if (!f)
goto out_elf_end;
@ -895,7 +908,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
"%s@plt", elf_sym__name(&sym, symstrs));
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
sympltname);
STB_GLOBAL, sympltname);
if (!f)
goto out_elf_end;
@ -1146,7 +1159,8 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
if (demangled != NULL)
elf_name = demangled;
new_symbol:
f = symbol__new(sym.st_value, sym.st_size, elf_name);
f = symbol__new(sym.st_value, sym.st_size,
GELF_ST_BIND(sym.st_info), elf_name);
free(demangled);
if (!f)
goto out_elf_end;

1
tools/perf/util/symbol.h
View File

@ -53,6 +53,7 @@ struct symbol {
u64 start;
u64 end;
u16 namelen;
u8 binding;
char name[0];
};