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[PAHOLE]: Introduce class__filter()

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That checks for constraints, the first one being a exclude prefix, and is used
by all the iterators.

Additional constraints can be things like specifying prefixes for compilation
unit names, i.e. "show me only the object files which name starts with
net/ipv4/", etc.

Initial patch provided by Bernhard Fischer, who also had the --exclude idea.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2006-11-30 23:12:21 -02:00
parent f428efa335
commit 5631a94760
1 changed files with 68 additions and 39 deletions
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107
pahole.c
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@ -15,6 +15,9 @@
#include "classes.h"
static char *exclude_prefix;
static size_t exclude_prefix_len;
struct structure {
struct list_head node;
const struct class *class;
@ -75,9 +78,33 @@ static void print_total_structure_stats(void)
structure__print(pos);
}
struct class *class__to_struct(struct class *class)
{
struct class *typedef_alias;
if (!class__is_struct(class, &typedef_alias))
return NULL;
return typedef_alias ?: class;
}
struct class *class__filter(struct class *class)
{
class = class__to_struct(class);
if (class == NULL) /* Not a structure */
return NULL;
if (exclude_prefix != NULL &&
(class->name == NULL ||
strncmp(exclude_prefix, class->name, exclude_prefix_len) == 0))
return NULL;
return class;
}
static int total_structure_iterator(struct class *class, void *cookie)
{
if (class->tag.tag == DW_TAG_structure_type && class->name != NULL)
class = class__filter(class);
if (class != NULL && class->name != NULL)
structures__add(class);
return 0;
}
@ -96,6 +123,7 @@ static struct option long_options[] = {
{ "nr_members", no_argument, NULL, 'n' },
{ "sizes", no_argument, NULL, 's' },
{ "total_struct_stats", no_argument, NULL, 't' },
{ "exclude", required_argument, NULL, 'x' },
{ NULL, 0, NULL, 0, }
};
@ -110,16 +138,15 @@ static void usage(void)
" -n, --nr_members show number of members\n"
" -N, --class_name_len show size of classes\n"
" -s, --sizes show size of classes\n"
" -t, --total_struct_stats show Multi-CU structure stats\n",
" -t, --total_struct_stats show Multi-CU structure stats\n"
" -x, --exclude <path> exclude path from reports\n",
DEFAULT_CACHELINE_SIZE);
}
static int nr_members_iterator(struct class *class, void *cookie)
{
if (class->tag.tag != DW_TAG_structure_type)
return 0;
if (class->nr_members > 0 && class->name != NULL)
class = class__filter(class);
if (class != NULL && class->name == NULL && class->nr_members > 0)
printf("%s: %u\n", class->name, class->nr_members);
return 0;
}
@ -131,21 +158,12 @@ static int cu_nr_members_iterator(struct cu *cu, void *cookie)
static int sizes_iterator(struct class *class, void *cookie)
{
struct class *typedef_alias;
if (!class__is_struct(class, &typedef_alias))
return 0;
class__find_holes(typedef_alias ?: class);
if (typedef_alias != NULL) {
if (typedef_alias->size > 0)
printf("typedef %s:struct(%s): %llu %u\n",
class->name ?: "",
typedef_alias->name ?: "",
typedef_alias->size, typedef_alias->nr_holes);
} else if (class->size > 0)
printf("struct %s: %llu %u\n", class->name ?: "<unknown>",
class->size, class->nr_holes);
class = class__filter(class);
if (class != NULL && class->name != NULL && class->size > 0) {
class__find_holes(class);
printf("%s: %llu %u\n",
class->name, class->size, class->nr_holes);
}
return 0;
}
@ -156,14 +174,12 @@ static int cu_sizes_iterator(struct cu *cu, void *cookie)
static int holes_iterator(struct class *class, void *cookie)
{
struct class *typedef_alias;
if (!class__is_struct(class, &typedef_alias))
return 0;
class__find_holes(typedef_alias ?: class);
if (class->nr_holes != 0)
class__print(typedef_alias ?: class);
class = class__filter(class);
if (class != NULL && class->name != NULL) {
class__find_holes(class);
if (class->nr_holes > 0)
class__print(class);
}
return 0;
}
@ -174,15 +190,10 @@ static int cu_holes_iterator(struct cu *cu, void *cookie)
static int class_name_len_iterator(struct class *class, void *cookie)
{
struct class *typedef_alias;
const char *name;
class = class__filter(class);
if (class != NULL && class->name != NULL)
printf("%s: %u\n", class->name, strlen(class->name));
if (!class__is_struct(class, &typedef_alias))
return 0;
name = (typedef_alias ?: class)->name;
if (name != NULL)
printf("%s: %u\n", name, strlen(name));
return 0;
}
@ -191,6 +202,21 @@ static int cu_class_name_len_iterator(struct cu *cu, void *cookie)
return cu__for_each_class(cu, class_name_len_iterator, NULL);
}
static int class__iterator(struct class *class, void *cookie)
{
class = class__filter(class);
if (class != NULL) {
class__find_holes(class);
class__print(class);
}
return 0;
}
static int cu__iterator(struct cu *cu, void *cookie)
{
return cu__for_each_class(cu, class__iterator, NULL);
}
int main(int argc, char *argv[])
{
int option, option_index;
@ -203,7 +229,7 @@ int main(int argc, char *argv[])
int show_total_structure_stats = 0;
int show_only_with_holes = 0;
while ((option = getopt_long(argc, argv, "c:hHnNst",
while ((option = getopt_long(argc, argv, "c:hHnNstx:",
long_options, &option_index)) >= 0)
switch (option) {
case 'c': cacheline_size = atoi(optarg); break;
@ -212,6 +238,9 @@ int main(int argc, char *argv[])
case 'n': show_nr_members = 1; break;
case 'N': show_class_name_len = 1; break;
case 't': show_total_structure_stats = 1; break;
case 'x': exclude_prefix = optarg;
exclude_prefix_len = strlen(exclude_prefix);
break;
case 'h': usage(); return EXIT_SUCCESS;
default: usage(); return EXIT_FAILURE;
}
@ -261,7 +290,7 @@ int main(int argc, char *argv[])
} else
printf("struct %s not found!\n", class_name);
} else
cus__print_classes(cus, DW_TAG_structure_type);
cus__for_each_cu(cus, cu__iterator, NULL);
return EXIT_SUCCESS;
}