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feat: add magic

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This commit is contained in:
Renge 2022-03-26 00:23:11 -04:00
parent 507276d82f
commit 8c1556c270
3 changed files with 44 additions and 51 deletions
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2
hw3/Makefile
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@ -17,7 +17,7 @@ INC := -I $(INCD)
CFLAGS := -Wall -Werror -Wno-unused-function -MMD
COLORF := -DCOLOR
DFLAGS := -g -DDEBUG -DCOLOR -DWEAK_MAGIC
DFLAGS := -g -DDEBUG -DCOLOR
PRINT_STAMENTS := -DERROR -DSUCCESS -DWARN -DINFO
STD := -std=c99

1
hw3/src/main.c
View File

@ -2,7 +2,6 @@
#include "sfmm.h"
int main(int argc, char const *argv[]) {
sf_set_magic(0x0);
size_t sz_x = sizeof(int) * 20, sz_y = sizeof(int) * 16;
void *x = sf_malloc(sz_x);

92
hw3/src/sfmm.c
View File

@ -19,7 +19,7 @@ static sf_size_t alloc = 0x00000004;
int sf_initialize();
void set_header(sf_block *block, sf_header value);
void set_entire_header(sf_block *block, sf_size_t paylod_size, sf_size_t block_size,
sf_size_t is_alloc, sf_size_t is_prv_alloc, sf_size_t is_in_qklst);
sf_size_t is_alloc, sf_size_t is_prv_alloc, sf_size_t is_in_qklst, int crete);
void set_payload_size(sf_block *block, sf_size_t payload_size);
void set_block_size(sf_block *block, sf_size_t block_size);
void set_alloc(sf_block *block, sf_size_t is_alloc);
@ -41,6 +41,7 @@ sf_block *get_prev_block(sf_block *block);
sf_block *get_next_block(sf_block *block);
void remove_list(sf_block *block);
sf_size_t get_pow(sf_size_t pow);
void xor_with_magic(sf_header *header);
void *sf_malloc(sf_size_t size)
{
@ -61,7 +62,7 @@ void *sf_malloc(sf_size_t size)
sf_block *block = sf_quick_lists[index].first;
sf_quick_lists[index].length -= 1;
sf_quick_lists[index].first = block->body.links.next;
set_entire_header(block, size, get_block_size(block->header), 1, get_prv_alloc(block->header), 0);
set_entire_header(block, size, get_block_size(block->header), 1, get_prv_alloc(block->header), 0, 0);
return block;
}
@ -77,7 +78,7 @@ void *sf_malloc(sf_size_t size)
{
if (get_block_size(ptr->header) >= min_size)
{
set_entire_header(ptr, size, get_block_size(ptr->header), 1, get_prv_alloc(ptr->header), 0);
set_entire_header(ptr, size, get_block_size(ptr->header), 1, get_prv_alloc(ptr->header), 0, 0);
return ptr->body.payload;
}
}
@ -91,8 +92,8 @@ void *sf_malloc(sf_size_t size)
remove_list(ptr);
sf_block *block = split_block(ptr, min_size);
sf_size_t block_size = get_block_size(block->header);
set_entire_header(ptr, size, min_size, 1, get_prv_alloc(ptr->header), 0);
set_entire_header(block, 0, block_size, 0, get_prv_alloc(ptr->header), 0);
set_entire_header(ptr, size, min_size, 1, get_prv_alloc(ptr->header), 0, 0);
set_entire_header(block, 0, block_size, 0, get_prv_alloc(block->header), 0, 0);
put_block(block);
// sf_show_block(block);
return ptr->body.payload;
@ -114,7 +115,7 @@ void *sf_malloc(sf_size_t size)
}
if (last->body.links.next != NULL)
remove_list(last);
set_entire_header(last, 0, (get_block_size(last->header) + PAGE_SZ), 0, get_prv_alloc(last->header), 0);
set_entire_header(last, 0, (get_block_size(last->header) + PAGE_SZ), 0, get_prv_alloc(last->header), 0, 0);
put_block(last);
}
sf_block *ptr = last;
@ -122,11 +123,12 @@ void *sf_malloc(sf_size_t size)
if (get_block_size(last->header) - min_size >= min)
{
ptr = split_block(last, min_size);
set_entire_header(ptr, 0, (get_block_size(ptr->header)), 0, get_prv_alloc(ptr->header), 0);
set_entire_header(ptr, 0, (get_block_size(ptr->header)), 0, get_prv_alloc(ptr->header), 0, 0);
put_block(ptr);
}
set_entire_header(last, size, get_block_size(last->header), 1, get_prv_alloc(last->header), 0);
set_entire_header(last, size, get_block_size(last->header), 1, get_prv_alloc(last->header), 0, 0);
epi = (sf_block *)(((intptr_t)sf_mem_end()) - 2 * sizeof(sf_header));
set_entire_header(epi, 0, 0, 1, get_alloc(epi->prev_footer), 0, 1);
// sf_show_block(ptr);
// sf_show_block(epi);
@ -141,7 +143,7 @@ void sf_free(void *pp)
sf_size_t index = (get_block_size(block->header) - 32) / 16;
if (index < 10)
{
set_entire_header(block, 0, get_block_size(block->header), 1, get_prv_alloc(block->header), 1);
set_entire_header(block, 0, get_block_size(block->header), 1, get_prv_alloc(block->header), 1, 0);
if (sf_quick_lists[index].length >= 5)
{
sf_block *ptr = sf_quick_lists[index].first;
@ -181,14 +183,14 @@ void *sf_realloc(void *pp, sf_size_t rsize)
{
if (size - new_size < min)
{
set_entire_header(block, rsize, size, 1, get_prv_alloc(block->header), 0);
set_entire_header(block, rsize, size, 1, get_prv_alloc(block->header), 0, 0);
return block->body.payload;
}
else
{
sf_block *ptr = split_block(block, new_size);
set_entire_header(block, rsize, new_size, 1, get_prv_alloc(block->header), 0);
set_entire_header(ptr, 0, get_block_size(ptr->header), 0, get_prv_alloc(ptr->header), 0);
set_entire_header(block, rsize, new_size, 1, get_prv_alloc(block->header), 0, 0);
set_entire_header(ptr, 0, get_block_size(ptr->header), 0, get_prv_alloc(ptr->header), 0, 0);
release_block(ptr);
return block->body.payload;
}
@ -216,10 +218,10 @@ int sf_initialize()
}
pro = (sf_block *)sf_mem_start();
// sf_show_block(pro);
set_entire_header(pro, 0, 32, 1, 1, 0);
set_entire_header(pro, 0, 32, 1, 1, 0, 1);
epi = (sf_block *)(((intptr_t)sf_mem_end()) - 2 * sizeof(sf_header));
set_entire_header(epi, 0, 0, 1, 1, 0);
set_entire_header(epi, 0, 0, 1, 1, 0, 1);
// sf_show_block(epi);
for (size_t i = 0; i < NUM_FREE_LISTS; i++)
{
@ -233,7 +235,7 @@ int sf_initialize()
}
sf_block *block = get_next_block(pro);
sf_size_t size = PAGE_SZ - 6 * sizeof(sf_header);
set_entire_header(block, 0, size, 0, 1, 0);
set_entire_header(block, 0, size, 0, 1, 0, 1);
block->prev_footer = pro->header;
put_block(block);
return 0;
@ -249,49 +251,45 @@ sf_size_t get_min_size(sf_size_t size)
void set_header(sf_block *block, sf_header value)
{
value ^= MAGIC;
block->header = value;
if (get_alloc(block->header) == 0)
{
// block->header ^= MAGIC;
sf_block *next = get_next_block(block);
// block->header ^= MAGIC;
// next->prev_footer ^= MAGIC;
next->prev_footer = block->header;
// next->prev_footer ^= MAGIC;
}
}
void set_entire_header(sf_block *block, sf_size_t paylod_size, sf_size_t block_size,
sf_size_t is_alloc, sf_size_t is_prv_alloc, sf_size_t is_in_qklst)
sf_size_t is_alloc, sf_size_t is_prv_alloc, sf_size_t is_in_qklst, int create)
{
if (create)
block->header ^= MAGIC;
set_alloc(block, is_alloc);
set_payload_size(block, paylod_size);
set_block_size(block, block_size);
set_prv_alloc(block, is_prv_alloc);
set_in_qklst(block, is_in_qklst);
// sf_show_block(block);
}
void set_payload_size(sf_block *block, sf_size_t payload_size)
{
// block->header ^= MAGIC;
sf_header value = (block->header & 0x00000000FFFFFFFF) | (uint64_t)payload_size << 32;
sf_header header = block->header ^ MAGIC;
sf_header value = (header & 0x00000000FFFFFFFF) | (uint64_t)payload_size << 32;
set_header(block, value);
// block->header ^= MAGIC;
}
void set_block_size(sf_block *block, sf_size_t block_size)
{
// block->header ^= MAGIC;
sf_header value = (block->header & 0xFFFFFFFF0000000F) | (uint64_t)block_size;
sf_header header = block->header ^ MAGIC;
sf_header value = (header & 0xFFFFFFFF0000000F) | (uint64_t)block_size;
set_header(block, value);
// block->header ^= MAGIC;
}
void set_alloc(sf_block *block, sf_size_t is_alloc)
{
// block->header ^= MAGIC;
sf_header value = block->header;
sf_header header = block->header ^ MAGIC;
sf_header value = header;
if (is_alloc)
{
value |= alloc;
@ -301,13 +299,12 @@ void set_alloc(sf_block *block, sf_size_t is_alloc)
value &= (~((uint64_t)alloc));
}
set_header(block, value);
// block->header ^= MAGIC;
}
void set_prv_alloc(sf_block *block, sf_size_t is_prv_allc)
{
// block->header ^= MAGIC;
sf_header value = block->header;
sf_header header = block->header ^ MAGIC;
sf_header value = header;
if (is_prv_allc)
{
value |= prv_alloc;
@ -317,13 +314,12 @@ void set_prv_alloc(sf_block *block, sf_size_t is_prv_allc)
value &= (~((uint64_t)prv_alloc));
}
set_header(block, value);
// block->header ^= MAGIC;
}
void set_in_qklst(sf_block *block, sf_size_t is_in_qklst)
{
// block->header ^= MAGIC;
sf_header value = block->header;
sf_header header = block->header ^ MAGIC;
sf_header value = header;
if (is_in_qklst)
{
value |= in_qklst;
@ -333,46 +329,40 @@ void set_in_qklst(sf_block *block, sf_size_t is_in_qklst)
value &= (~((uint64_t)in_qklst));
}
set_header(block, value);
// block->header ^= MAGIC;
}
sf_size_t get_payload_size(sf_header header)
{
// header ^= MAGIC;
header ^= MAGIC;
sf_size_t ans = ((uint64_t)header & 0xFFFFFFFF00000000) >> 32;
// header ^= MAGIC;
return ans;
}
sf_size_t get_block_size(sf_header header)
{
// header ^= MAGIC;
header ^= MAGIC;
sf_size_t ans = ((uint64_t)header & 0x00000000FFFFFFF0);
// header ^= MAGIC;
return ans;
}
sf_size_t get_alloc(sf_header header)
{
// header ^= MAGIC;
header ^= MAGIC;
sf_size_t ans = ((uint64_t)header & alloc) ? 1 : 0;
// header ^= MAGIC;
return ans;
}
sf_size_t get_prv_alloc(sf_header header)
{
// header ^= MAGIC;
header ^= MAGIC;
sf_size_t ans = ((uint64_t)header & prv_alloc) ? 1 : 0;
// header ^= MAGIC;
return ans;
}
sf_size_t get_in_qklst(sf_header header)
{
// header ^= MAGIC;
header ^= MAGIC;
sf_size_t ans = ((uint64_t)header & in_qklst) ? 1 : 0;
// header ^= MAGIC;
return ans;
}
@ -411,7 +401,7 @@ sf_block *split_block(sf_block *block, size_t size)
size_t new_size = original_size - size;
set_block_size(block, size);
sf_block *ptr = get_next_block(block);
set_entire_header(ptr, 0, new_size, 0, get_prv_alloc(block->header), 0);
set_entire_header(ptr, 0, new_size, 0, get_prv_alloc(block->header), 0, 1);
ptr->prev_footer = block->header;
return ptr;
}
@ -420,7 +410,6 @@ void valid_pointer(sf_block *pp)
{
if (pp == NULL || (intptr_t)pp % 16 != 0)
abort();
// pp->header ^= sf_magic();
if (get_block_size(pp->header) < 32 || get_block_size(pp->header) % 16 != 0)
abort();
if (((intptr_t)&pp->header) < (((intptr_t)&pro->header) + 32) || ((intptr_t)&pp->header) > (((intptr_t)&epi->header) - 8))
@ -448,7 +437,7 @@ void release_block(sf_block *block)
total_size += get_block_size(prev->header);
block = prev;
}
set_entire_header(block, 0, total_size, 0, get_prv_alloc(block->header), 0);
set_entire_header(block, 0, total_size, 0, get_prv_alloc(block->header), 0, 0);
put_block(block);
return;
}
@ -468,3 +457,8 @@ void remove_list(sf_block *block)
block->body.links.next->body.links.prev = block->body.links.prev;
block->body.links.prev->body.links.next = block->body.links.next;
}
void xor_with_magic(sf_header *header)
{
*header ^= MAGIC;
}