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[PAHOLE]: Introduce --nr_methods 

To show how many non inline functions receive as a parameter each of the structs
in a project, example:

[acme@newtoy ctracer_example]$ pahole --nr_methods vmlinux | sort -k2 -nr | head -5
file: 526
inode: 479
sk_buff: 386
sock: 383
dentry: 295
[acme@newtoy ctracer_example]$

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-01-13 13:59:32 -02:00
parent 7e57db18d7
commit 03530985c1
1 changed files with 63 additions and 4 deletions
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67
pahole.c
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@ -35,6 +35,7 @@ struct structure {
const struct class *class;
const struct cu *cu;
uint32_t nr_files;
uint32_t nr_methods;
};
static struct structure *structure__new(const struct class *class,
@ -43,9 +44,10 @@ static struct structure *structure__new(const struct class *class,
struct structure *self = malloc(sizeof(*self));
if (self != NULL) {
self->class = class;
self->cu = cu;
self->nr_files = 1;
self->class = class;
self->cu = cu;
self->nr_files = 1;
self->nr_methods = 0;
}
return self;
@ -82,6 +84,11 @@ static void nr_members_formatter(const struct structure *self)
class__nr_members(self->class));
}
static void nr_methods_formatter(const struct structure *self)
{
printf("%s: %u\n", class__name(self->class), self->nr_methods);
}
static void size_formatter(const struct structure *self)
{
printf("%s: %u %u\n", class__name(self->class),
@ -259,6 +266,53 @@ static int cu_unique_iterator(struct cu *cu, void *cookie)
return cu__for_each_tag(cu, unique_iterator, cookie, tag__filter);
}
static struct tag *nr_methods__filter(struct tag *tag, struct cu *cu,
void *cookie)
{
if (tag->tag != DW_TAG_subprogram)
return NULL;
if (function__declared_inline(tag__function(tag)))
return NULL;
return tag;
}
static int nr_methods_iterator(struct tag *tag, struct cu *cu, void *cookie)
{
struct parameter *pos;
struct structure *str;
struct type *ctype;
list_for_each_entry(pos, &tag__ftype(tag)->parms, tag.node) {
struct tag *type =
cu__find_tag_by_id(cu, parameter__type(pos, cu));
if (type == NULL || type->tag != DW_TAG_pointer_type)
continue;
type = cu__find_tag_by_id(cu, type->type);
if (type == NULL || type->tag != DW_TAG_structure_type)
continue;
ctype = tag__type(type);
if (ctype->name == NULL)
continue;
str = structures__find(ctype->name);
if (str != NULL)
++str->nr_methods;
}
return 0;
}
static int cu_nr_methods_iterator(struct cu *cu, void *cookie)
{
return cu__for_each_tag(cu, nr_methods_iterator, cookie,
nr_methods__filter);
}
static struct option long_options[] = {
{ "cacheline_size", required_argument, NULL, 'c' },
{ "class_name_len", no_argument, NULL, 'N' },
@ -268,6 +322,7 @@ static struct option long_options[] = {
{ "nr_members", no_argument, NULL, 'n' },
{ "sizes", no_argument, NULL, 's' },
{ "nr_definitions", no_argument, NULL, 't' },
{ "nr_methods", no_argument, NULL, 'm' },
{ "exclude", required_argument, NULL, 'x' },
{ "cu_exclude", required_argument, NULL, 'X' },
{ "decl_exclude", required_argument, NULL, 'D' },
@ -288,6 +343,7 @@ static void usage(void)
" -c, --cacheline_size <size> set cacheline size (default=%d)\n"
" -n, --nr_members show number of members\n"
" -N, --class_name_len show size of classes\n"
" -m, --nr_methods show number of methods\n"
" -s, --sizes show size of classes\n"
" -t, --nr_definitions show how many times struct was defined\n"
" -D, --decl_exclude <prefix> exclude classes declared in files with prefix\n"
@ -305,7 +361,7 @@ int main(int argc, char *argv[])
char *class_name = NULL;
void (*formatter)(const struct structure *s) = class_formatter;
while ((option = getopt_long(argc, argv, "B:c:D:hH:nNpstVx:X:",
while ((option = getopt_long(argc, argv, "B:c:D:hH:mnNpstVx:X:",
long_options, &option_index)) >= 0)
switch (option) {
case 'c': cacheline_size = atoi(optarg); break;
@ -314,6 +370,7 @@ int main(int argc, char *argv[])
case 's': formatter = size_formatter; break;
case 'n': formatter = nr_members_formatter; break;
case 'N': formatter = class_name_len_formatter; break;
case 'm': formatter = nr_methods_formatter; break;
case 'p': show_packable = 1; break;
case 't': formatter = nr_definitions_formatter; break;
case 'D': decl_exclude_prefix = optarg;
@ -355,6 +412,8 @@ int main(int argc, char *argv[])
}
cus__for_each_cu(cus, cu_unique_iterator, NULL, cu__filter);
if (formatter == nr_methods_formatter)
cus__for_each_cu(cus, cu_nr_methods_iterator, NULL, cu__filter);
if (class_name != NULL) {
struct structure *s = structures__find(class_name);