fotonmoton/malloc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

add therad support

Browse source
This commit is contained in:
Gregory 2019-05-08 21:10:37 +03:00
parent 80fedbeb03
commit 3fa3ff5304
10 changed files with 248 additions and 34 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
inc/ft_malloc.h
View file

@ -17,6 +17,7 @@
void free(void *ptr);
void *malloc(size_t size);
void *calloc(size_t count, size_t size);
void *realloc(void *ptr, size_t size);
void show_alloc_mem(void);

8
inc/ft_malloc_internal.h
View file

@ -15,6 +15,8 @@
# include <stddef.h>
# include <stdint.h>
# include <pthread.h>
# define TINY 512
# define SMALL 4096
@ -47,4 +49,10 @@ typedef struct s_arena
extern t_arena g_base;
extern pthread_mutex_t g_malloc_mutex;
int get_arena_type(size_t size);
void *malloc_core(size_t size);
void free_core(void *used);
#endif

2
meson.build
View file

@ -7,6 +7,7 @@ project(
)
add_global_arguments(
'-O0',
'-Wall',
'-Wextra',
'-Werror',
@ -30,6 +31,7 @@ sources = [
'src/malloc.c',
'src/free.c',
'src/realloc.c',
'src/get_arena_type.c'
]
libft = subproject('libft')

35
src/calloc.c Normal file
View file

@ -0,0 +1,35 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* calloc.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: gtertysh <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/05/08 21:07:09 by gtertysh #+# #+# */
/* Updated: 2019/05/08 21:07:34 by gtertysh ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_malloc_internal.h"
#include "libft.h"
static void *calloc_core(size_t count, size_t size)
{
void *ptr;
ptr = malloc(count * size);
if (!ptr)
return (NULL);
ft_bzero(ptr, count * size);
return (ptr);
}
void *calloc(size_t count, size_t size)
{
void *ptr;
pthread_mutex_lock(&g_malloc_mutex);
ptr = calloc_core(count, size);
pthread_mutex_unlock(&g_malloc_mutex);
return (ptr);
}

11
src/free.c
View file

@ -6,14 +6,14 @@
/* By: gtertysh <gtertysh@student.unit.ua> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/05/06 22:35:53 by foton #+# #+# */
/* Updated: 2019/05/06 22:40:09 by gtertysh ### ########.fr */
/* Updated: 2019/05/08 21:08:00 by gtertysh ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_malloc.h"
#include "ft_malloc_internal.h"
void free(void *used)
void free_core(void *used)
{
t_chunk *chunk;
@ -39,3 +39,10 @@ void free(void *used)
chunk->next->prev = chunk;
}
}
void free(void *used)
{
pthread_mutex_lock(&g_malloc_mutex);
free_core(used);
pthread_mutex_unlock(&g_malloc_mutex);
}

22
src/get_arena_type.c Normal file
View file

@ -0,0 +1,22 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_arena_type.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: gtertysh <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/05/08 21:08:05 by gtertysh #+# #+# */
/* Updated: 2019/05/08 21:08:06 by gtertysh ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_malloc_internal.h"
int get_arena_type(size_t size)
{
if (size <= CHUNK_SIZE(TINY))
return (TINY);
if (size <= CHUNK_SIZE(SMALL))
return (SMALL);
return (LARGE);
}

25
src/malloc.c
View file

@ -6,7 +6,7 @@
/* By: gtertysh <gtertysh@student.unit.ua> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/05/06 22:35:57 by foton #+# #+# */
/* Updated: 2019/05/08 19:44:07 by gtertysh ### ########.fr */
/* Updated: 2019/05/08 21:08:52 by gtertysh ### ########.fr */
/* */
/* ************************************************************************** */
@ -17,6 +17,8 @@
t_arena g_base = { .type = START, .size = 0, .next = &g_base, .heap = NULL};
pthread_mutex_t g_malloc_mutex = PTHREAD_MUTEX_INITIALIZER;
static size_t get_actual_size(size_t size, int type)
{
size_t minimum;
@ -30,15 +32,6 @@ static size_t get_actual_size(size_t size, int type)
return ((ARENA_SIZE(minimum) + page - 1) / page * page);
}
static int get_arena_type(size_t size)
{
if (size <= CHUNK_SIZE(TINY))
return (TINY);
if (size <= CHUNK_SIZE(SMALL))
return (SMALL);
return (LARGE);
}
static t_arena *get_more_arena(size_t size, int type)
{
t_arena *arena;
@ -85,7 +78,7 @@ static t_chunk *chunk_heap(t_chunk *chunk, size_t size)
return (new_chunk);
}
void *malloc(size_t size)
void *malloc_core(size_t size)
{
t_arena *arena;
t_chunk *heap;
@ -112,3 +105,13 @@ void *malloc(size_t size)
}
return (space + 1);
}
void *malloc(size_t size)
{
void *ptr;
pthread_mutex_lock(&g_malloc_mutex);
ptr = malloc_core(size);
pthread_mutex_unlock(&g_malloc_mutex);
return (ptr);
}

18
src/realloc.c
View file

@ -6,7 +6,7 @@
/* By: gtertysh <gtertysh@student.unit.ua> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/05/06 22:35:48 by foton #+# #+# */
/* Updated: 2019/05/08 19:44:41 by gtertysh ### ########.fr */
/* Updated: 2019/05/08 21:09:05 by gtertysh ### ########.fr */
/* */
/* ************************************************************************** */
@ -14,7 +14,7 @@
#include "ft_malloc_internal.h"
#include "libft.h"
void *realloc(void *ptr, size_t size)
static void *realloc_core(void *ptr, size_t size)
{
t_chunk *chunk;
t_chunk *new_chunk;
@ -26,8 +26,18 @@ void *realloc(void *ptr, size_t size)
return (NULL);
if (chunk->size >= CHUNK_SIZE(size))
return (ptr);
new_chunk = malloc(size);
new_chunk = malloc_core(size);
ft_memmove(new_chunk, ptr, chunk->size - CHUNK_SIZE(0));
free(ptr);
free_core(ptr);
return (new_chunk);
}
void *realloc(void *ptr, size_t size)
{
void *new_ptr;
pthread_mutex_lock(&g_malloc_mutex);
new_ptr = realloc_core(ptr, size);
pthread_mutex_unlock(&g_malloc_mutex);
return (new_ptr);
}

114
t/fuzzy_fast.c Normal file
View file

@ -0,0 +1,114 @@
// gcc -O2 -o main main.c -lz
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <assert.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <zlib.h>
struct item {
void *ptr;
size_t size;
size_t hash;
};
int dev_urandom_fd = -1;
static void hash_compute(struct item *item) {
unsigned long pos = 0;
do {
pos += read(dev_urandom_fd, item->ptr, item->size - pos);
assert(errno == 0);
// fprintf(stderr, "Read %lu bytes from /dev/urandom\n", pos);
} while (pos < item->size);
item->hash = adler32(0, item->ptr, item->size);
}
static int hash_check(struct item *item) {
if (item->ptr == NULL)
return 1;
return (item->hash == adler32(0, item->ptr, item->size));
}
int main(int argc, const char *const argv[]) {
if (argc < 4) {
puts("Usage: ... num_passes num_items size_min size_max");
return 1;
}
dev_urandom_fd = open("/dev/urandom", O_RDONLY);
assert(dev_urandom_fd >= 0);
size_t num_passes = atoi(argv[1]),
num_items = atoi(argv[2]),
size_min = atoi(argv[3]),
size_max = atoi(argv[4]);
struct item items[num_items];
srand(argc + num_items + size_min + size_max + (int)(long)argv[0]);
srand(rand() ^ time(NULL));
bzero(items, sizeof(struct item) * num_items);
for (size_t pass = 0; pass < num_passes; pass++) {
for (size_t i = 0; i < num_items; i++) {
if (pass % 3 == 0) {
if (rand() & 1 && items[i].ptr == NULL) {
items[i].size = rand() % (size_max - size_min) + size_min;
items[i].ptr = malloc(items[i].size);
if (items[i].ptr) {
hash_compute(&items[i]);
printf("pass %-2lu item %-4lu malloc(%lu) => %p..%p\n",
pass, i, items[i].size, items[i].ptr, items[i].ptr + items[i].size);
} else {
printf("\033[0;31mpass %-2lu item %-4lu returned NULL\033[0m\n", pass, i);
}
}
} else if (pass % 3 == 1) {
if (rand() & 1 && items[i].ptr != NULL) {
void *old_ptr = items[i].ptr;
items[i].size = rand() % (size_max - size_min) + size_min;
items[i].ptr = realloc(items[i].ptr, items[i].size);
if (items[i].ptr) {
hash_compute(&items[i]);
printf("pass %-2lu item %-4lu realloc(%p, %lu) => %p\n",
pass, i, old_ptr, items[i].size, items[i].ptr);
} else {
printf("\033[0;31mpass %-2lu item %-4lu realloc failed\033[0m\n", pass, i);
}
}
} else {
if (rand() & 1 && items[i].ptr != NULL) {
printf("pass %-2lu item %-4lu free(%p)\n",
pass, i, items[i].ptr);
free(items[i].ptr);
items[i].ptr = NULL;
} else if (pass == num_passes - 1 && items[i].ptr != NULL) {
printf("pass %-2lu item %-4lu free(%p)\n",
pass, i, items[i].ptr);
free(items[i].ptr);
items[i].ptr = NULL;
}
}
for (size_t j = 0; j < num_items; j++) {
if (!hash_check(&items[i])) {
printf("\033[0;31mpass %-2lu item %-4lu hash_check failed\033[0m\n", pass, i);
items[i].ptr = NULL;
}
}
}
/* show_alloc_mem(); */
}
close(dev_urandom_fd);
return (0);
}

18
t/meson.build
View file

@ -6,13 +6,25 @@ malloc_tests = executable(
)
malloc_fuzzy_tests = executable(
malloc_fuzzy = executable(
'malloc_fuzzy',
'fuzzy.c',
include_directories: inc,
link_with: ft_malloc,
)
test('malloc tests', malloc_tests)
zlib_dep = dependency('zlib')
test('malloc fuzzy tests', malloc_fuzzy_tests, args: ['10', '1000', '0', '10000'])
malloc_fuzzy_fast = executable(
'malloc_fuzzy_fast',
'fuzzy_fast.c',
include_directories: inc,
link_with: ft_malloc,
dependencies: zlib_dep
)
test('basic', malloc_tests)
test('fuzzy', malloc_fuzzy, args: ['10', '1000', '0', '10000'])
test('fuzzy_fast', malloc_fuzzy_fast, args: ['100', '1000', '0', '10000'])