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Merge pull request 'areaIntegration' (#1) from areaIntegration into master 

Reviewed-on: http://git.mathux.org/mathieu/matos/pulls/1
This commit is contained in:
mathieu 2021-10-01 22:22:09 +02:00
parent a96f72b0af 1222c0b998
commit d357d63ff3
8 changed files with 234 additions and 63 deletions
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116
core/alloc.c
View File

@ -1,6 +1,8 @@
#define pr_fmt(fmt) "[alloc]: " fmt
//#define DEBUG
#include "alloc.h"
#include "allocArea.h"
#include "assert.h"
#include "errno.h"
#include "irq.h"
#include "kernel.h"
@ -11,8 +13,8 @@
#include "paging.h"
#define IS_SELF_CONTAINED(desc) ((vaddr_t)((desc)->page) == (vaddr_t)(desc))
// Slab will contains object from sizeof(void *) to PAGE_SIZE/2 by pow2
static struct slabDesc *slub;
static int allocInitialized = FALSE;
static int allocSlab(struct slabDesc **desc, size_t sizeEl, size_t sizeSlab,
int self_containing);
@ -20,14 +22,13 @@ static int allocSlabEntry(struct slabEntry **desc, size_t sizeEl, size_t sizeSla
int selfContained);
static int formatPage(struct slabEntry *desc, size_t size, size_t sizeSlab, int selfContained);
static int freeFromSlab(void *ptr, struct slabEntry *slab);
static struct slabDesc *allocGetSlab(size_t size);
static struct {
size_t elementSize;
size_t slabSize;
unsigned char isSelf;
} initSlab[] = {{sizeof(struct slabDesc), PAGE_SIZE, 1},
{sizeof(struct slabEntry), PAGE_SIZE, 1},
{4, PAGE_SIZE, 0},
} initSlab[] = {{4, PAGE_SIZE, 0},
{8, PAGE_SIZE, 0},
{16, PAGE_SIZE, 0},
{32, PAGE_SIZE, 0},
@ -37,14 +38,25 @@ static struct {
{1024, 2 * PAGE_SIZE, 0},
{2048, 3 * PAGE_SIZE, 0},
{4096, 4 * PAGE_SIZE, 0},
{8192, 8 * PAGE_SIZE, 0},
{16384, 12 * PAGE_SIZE, 0},
{0, 0, 0}};
int allocSetup(void)
int allocSetup(size_t sizeOfArea, vaddr_t *areaAddr, vaddr_t *descAddr, vaddr_t *entryAddr)
{
list_init(slub);
assert(allocBookSlab(sizeof(struct slabDesc), PAGE_SIZE, TRUE) == 0);
*descAddr = (vaddr_t)allocGetSlab(sizeof(struct slabDesc));
assert(allocBookSlab(sizeof(struct slabEntry), PAGE_SIZE, TRUE) == 0);
*entryAddr = (vaddr_t)allocGetSlab(sizeof(struct slabEntry));
assert(allocBookSlab(sizeOfArea, PAGE_SIZE, TRUE) == 0);
*areaAddr = (vaddr_t)allocGetSlab(sizeOfArea);
allocInitialized = TRUE;
return 0;
}
int allocPopulate()
{
for (uint i = 0; initSlab[i].elementSize != 0; i++) {
int ret;
@ -52,7 +64,7 @@ int allocSetup(void)
initSlab[i].isSelf))) {
if (ret == -EEXIST)
continue;
pr_devel("Fail to allocBookSlab %d for %d \n", ret, (1U << i));
pr_err("Fail to allocBookSlab %d for %d \n", ret, (1U << i));
return ret;
}
@ -84,6 +96,7 @@ int allocBookSlab(size_t sizeEl, size_t sizeSlab, int selfContained)
}
if ((ret = allocSlab(&newSlab, sizeEl, sizeSlab, selfContained))) {
pr_devel("Failed to alloc Slab\n");
restore_IRQs(flags);
return ret;
}
@ -102,6 +115,7 @@ int allocBookSlab(size_t sizeEl, size_t sizeSlab, int selfContained)
static int allocSlab(struct slabDesc **desc, size_t size, size_t sizeSlab, int selfContained)
{
uint nbPage, i;
vaddr_t alloc;
pr_devel("%s for size %d is self %d\n", __func__, size, selfContained);
@ -111,21 +125,27 @@ static int allocSlab(struct slabDesc **desc, size_t size, size_t sizeSlab, int s
return -ENOENT;
}
nbPage = DIV_ROUND_UP(sizeSlab, PAGE_SIZE);
paddr_t alloc = allocPhyPage(nbPage);
if (alloc == (paddr_t)NULL)
return -ENOMEM;
nbPage = DIV_ROUND_UP(sizeSlab, PAGE_SIZE);
if (allocInitialized) {
alloc = areaAlloc(nbPage);
if (alloc == (paddr_t)NULL)
return -ENOMEM;
} else {
alloc = (vaddr_t)allocPhyPage(nbPage);
if (alloc == (paddr_t)NULL)
return -ENOMEM;
for (i = 0; i < nbPage; i++) {
if (pageMap((vaddr_t)alloc + i * PAGE_SIZE, alloc + i * PAGE_SIZE, PAGING_MEM_WRITE))
goto free_page;
for (i = 0; i < nbPage; i++) {
if (pageMap(alloc + i * PAGE_SIZE, alloc + i * PAGE_SIZE, PAGING_MEM_WRITE))
goto free_page;
}
}
if (selfContained) {
*desc = (struct slabDesc *)alloc;
((*desc)->slab).freeEl = (char *)(*desc) + sizeof(struct slabDesc);
} else {
*desc = malloc(sizeof(struct slabDesc));
*desc = malloc(sizeof(struct slabDesc));
if (*desc == NULL)
return -ENOMEM;
(*desc)->slab.freeEl = (void *)alloc;
@ -151,7 +171,7 @@ free_page:
static int allocSlabEntry(struct slabEntry **desc, size_t size, size_t sizeSlab,
int selfContained)
{
uint nbPage, i;
uint nbPage;
pr_devel("%s for size %d is self %d\n", __func__, size, selfContained);
@ -162,20 +182,15 @@ static int allocSlabEntry(struct slabEntry **desc, size_t size, size_t sizeSlab,
}
nbPage = DIV_ROUND_UP(sizeSlab, PAGE_SIZE);
paddr_t alloc = allocPhyPage(nbPage);
vaddr_t alloc = areaAlloc(nbPage);
if (alloc == (paddr_t)NULL)
return -ENOMEM;
for (i = 0; i < nbPage; i++) {
if (pageMap((vaddr_t)alloc + i * PAGE_SIZE, alloc + i * PAGE_SIZE, PAGING_MEM_WRITE))
goto free_page;
}
if (selfContained) {
*desc = (struct slabEntry *)alloc;
(*desc)->freeEl = (char *)(*desc) + sizeof(struct slabEntry);
} else {
*desc = malloc(sizeof(struct slabEntry));
*desc = malloc(sizeof(struct slabEntry));
if (*desc == NULL)
return -ENOMEM;
(*desc)->freeEl = (void *)alloc;
@ -188,11 +203,6 @@ static int allocSlabEntry(struct slabEntry **desc, size_t size, size_t sizeSlab,
return formatPage((*desc), size, sizeSlab, selfContained);
free_page:
for (uint j = 0; j < i; j++) {
pageUnmap((vaddr_t)alloc + i * PAGE_SIZE);
}
return -ENOMEM;
}
@ -227,24 +237,36 @@ static void *allocFromSlab(struct slabEntry *slab)
return (void *)next;
}
static struct slabDesc *allocGetSlab(size_t size)
{
struct slabDesc *slab = NULL;
uint slubIdx;
list_foreach(slub, slab, slubIdx)
{
if (size <= slab->size)
return slab;
}
return NULL;
}
void *malloc(size_t size)
{
struct slabEntry *slabEntry;
struct slabDesc *slab = NULL;
uint slubIdx;
void *ret;
int flags;
int slabIdx;
disable_IRQs(flags);
list_foreach(slub, slab, slubIdx)
{
if (size <= slab->size)
break;
}
if (size >= PAGE_SIZE){
vaddr_t area = areaAlloc(DIV_ROUND_UP(size, PAGE_SIZE));
if (!list_foreach_early_break(slub, slab, slubIdx)) {
return (void *)area;
}
if ((slab = allocGetSlab(size)) == NULL) {
pr_devel("No slab found for %d\n", size);
return NULL;
}
@ -302,11 +324,7 @@ static int freeFromSlab(void *ptr, struct slabEntry *slab)
return 0;
}
void free(void *ptr)
{
if (!ptr)
return;
int freeSlabAllocated(void *ptr){
struct slabDesc *slab;
int slabIdx;
int flags;
@ -321,11 +339,21 @@ void free(void *ptr)
{
if (freeFromSlab(ptr, slabEntry)) {
restore_IRQs(flags);
return;
return 0;
}
}
}
restore_IRQs(flags);
pr_devel("free: slab not found\n");
return -1;
}
void free(void *ptr)
{
if (!ptr)
return;
if(!freeSlabAllocated(ptr))
return;
if(areaFree((vaddr_t)ptr))
pr_err("free: cannot found origin\n");
}

3
core/alloc.h
View File

@ -5,8 +5,9 @@
/*
* Initialize malloc system
*/
int allocSetup(void);
int allocSetup(size_t sizeOfArea, vaddr_t *areaAddr, vaddr_t *descAddr, vaddr_t *entryAddr);
int allocPopulate();
/*
* Allow malloc to allocate elements of this precise size.
* Otherwise the allocation will be in the closest biggest pool.

73
core/allocArea.c
View File

@ -6,20 +6,29 @@
#include "mem.h"
#include "stdarg.h"
struct memArea {
vaddr_t startAddr;
uint nbPages;
struct memArea *next;
struct memArea *prev;
};
static struct memArea *freeArea;
static struct memArea *usedArea;
void areaInit(void)
static int areaMergeFreeArea(struct memArea *prev, struct memArea *next);
void areaInit(vaddr_t firstMemUsed, vaddr_t lastUsed)
{
list_init(freeArea);
list_init(usedArea);
vaddr_t areaAddr, descAddr, entryAddr;
allocSetup(sizeof(struct memArea), &areaAddr, &descAddr, &entryAddr);
areaAdd(descAddr, PAGE_SIZE, FALSE);
if (entryAddr != descAddr)
areaAdd(entryAddr, PAGE_SIZE, FALSE);
if (areaAddr != descAddr && areaAddr != entryAddr)
areaAdd(areaAddr, PAGE_SIZE, FALSE);
int nbPages = DIV_ROUND_UP((lastUsed - firstMemUsed), PAGE_SIZE);
areaAdd(ALIGN_DOWN(firstMemUsed, PAGE_SIZE), nbPages, FALSE);
areaAdd(ALIGN_DOWN(areaAddr + PAGE_SIZE, PAGE_SIZE), 300 , TRUE);
allocPopulate();
}
struct memArea *areaFindFit(unsigned int nbPages)
@ -35,22 +44,22 @@ struct memArea *areaFindFit(unsigned int nbPages)
return NULL;
}
static void insertSorted(struct memArea *list, struct memArea *item)
static void insertSorted(struct memArea **list, struct memArea *item)
{
struct memArea *prev, *cur;
int count;
prev = NULL;
list_foreach(list, cur, count)
list_foreach(*list, cur, count)
{
if (cur->startAddr > item->startAddr)
break;
prev = cur;
}
if (prev)
list_insert_after(list, prev, item);
list_insert_after(*list, prev, item);
else
list_add_tail(list, item);
list_add_tail(*list, item);
}
vaddr_t areaAlloc(unsigned int nbPages)
@ -63,13 +72,15 @@ vaddr_t areaAlloc(unsigned int nbPages)
if (area->nbPages == nbPages) {
list_delete(freeArea, area);
insertSorted(usedArea, area);
insertSorted(&usedArea, area);
allocated = area;
}
struct memArea *newArea = (struct memArea *)malloc(sizeof(struct memArea));
if (!newArea)
if (!newArea){
pr_devel("Failed to allocated area of %d pages\n", nbPages);
return (vaddr_t)NULL;
}
// Avoid insertSorted(freeArea, newArea) call by modifying area
@ -79,14 +90,14 @@ vaddr_t areaAlloc(unsigned int nbPages)
area->nbPages -= nbPages;
area->startAddr += nbPages * PAGE_SIZE;
insertSorted(usedArea, newArea);
insertSorted(&usedArea, newArea);
allocated = newArea;
for (uint i = 0; i < nbPages; i++) {
paddr_t page = allocPhyPage(1);
if (page) {
pageMap(area->startAddr + i * PAGE_SIZE, page, PAGING_MEM_WRITE);
pageMap(newArea->startAddr + i * PAGE_SIZE, page, PAGING_MEM_WRITE);
} else {
// TODO
assert(1);
@ -96,6 +107,36 @@ vaddr_t areaAlloc(unsigned int nbPages)
return allocated->startAddr;
}
int areaAdd(vaddr_t addr, uint nbPages, int isFree)
{
struct memArea **area;
struct memArea *newArea = (struct memArea *)malloc(sizeof(struct memArea));
if (!newArea)
return (vaddr_t)NULL;
newArea->nbPages = nbPages;
newArea->startAddr = addr;
if (isFree) {
area = &freeArea;
} else {
area = &usedArea;
}
insertSorted(area, newArea);
if (isFree) {
if (newArea->prev)
areaMergeFreeArea(newArea->prev, *area);
if (newArea->next)
areaMergeFreeArea(*area, newArea->next);
}
return 0;
}
static int areaMergeFreeArea(struct memArea *prev, struct memArea *next)
{
if (prev->startAddr + prev->nbPages * PAGE_SIZE != next->startAddr) {
@ -134,7 +175,7 @@ int areaFree(vaddr_t addr)
return -1;
}
list_delete(usedArea, area);
insertSorted(freeArea, area);
insertSorted(&freeArea, area);
if (area->prev)
areaMergeFreeArea(area->prev, area);

12
core/allocArea.h
View File

@ -1,6 +1,16 @@
#pragma once
#include "paging.h"
#include "stdarg.h"
void areaInit(void);
struct memArea {
vaddr_t startAddr;
uint nbPages;
struct memArea *next;
struct memArea *prev;
};
void areaInit(vaddr_t firstMemUsed, vaddr_t lastUsed);
vaddr_t areaAlloc(unsigned int nbPages);
int areaFree(vaddr_t addr);
int areaAdd(vaddr_t addr, uint nbPages, int isFree);

1
core/klibc.h
View File

@ -51,3 +51,4 @@ int vasprintf(char **strp, const char *fmt, va_list ap);
#endif
#define pr_info(fmt, ...) printf(pr_fmt(fmt), ##__VA_ARGS__)
#define pr_err(fmt, ...) {printf(pr_fmt(fmt), ##__VA_ARGS__); assert(0);}

4
core/main.c
View File

@ -1,4 +1,5 @@
#include "alloc.h"
#include "allocArea.h"
#include "exception.h"
#include "gdt.h"
#include "idt.h"
@ -143,7 +144,8 @@ void kmain(unsigned long magic, unsigned long addr)
serialSetup(115200);
printf("Setting up allocation system\n");
allocSetup();
areaInit(firstUsedByMem, lastUsedByMem);
//allocSetup();
printf("Setting up thread system\n");
kthreadSetup(_stack_bottom, (_stack_top - _stack_bottom + 1));

86
custom_gdb_extension.py
View File

@ -136,6 +136,92 @@ class PhyMemDescListDumpCmd(gdb.Command):
print(self._phy_memDesc_lit_to_str(desc))
class PrintStructC99Cmd(gdb.Command):
def __init__(self):
super(PrintStructC99Cmd, self).__init__(
"print_struct_c99",
gdb.COMMAND_USER,
)
def complete(self, text, word):
return gdb.COMPLETE_SYMBOL
def get_count_heading(self, string):
for i, s in enumerate(string):
if s != ' ':
break
return i
def extract_typename(self, string):
first_line = string.split('\n')[0]
return first_line.split('=')[1][:-1].strip()
def invoke(self, arg, from_tty):
gdb.execute("set print pretty")
gdb.execute('set pagination off')
gdb.execute('set print repeats 0')
gdb.execute('set print elements unlimited')
ret_ptype = gdb.execute('ptype {}'.format(arg), to_string=True)
tname = self.extract_typename(ret_ptype)
print('{} {} = {{'.format(tname, arg))
r = gdb.execute('p {}'.format(arg), to_string=True)
r = r.split('\n')
for rr in r[1:]:
if '=' not in rr:
print(rr)
continue
hs = self.get_count_heading(rr)
rr_s = rr.strip().split('=', 1)
rr_rval = rr_s[1].strip()
print(' ' * hs + '.' + rr_s[0] + '= ' + rr_rval)
class ListDumpCmd(gdb.Command):
"""Prints a linked list"""
def __init__(self):
super(ListDumpCmd, self).__init__(
"list_dump", gdb.COMMAND_USER
)
def _print_list(self, val):
"""Walk through the linked list.
We will simply follow the 'next' pointers until we encounter the HEAD again
"""
idx = 0
head = val
kthread_ptr = val
result = ""
while kthread_ptr != 0 and (idx == 0 or kthread_ptr != head):
result += gdb.execute('p *({}){}'.format(str(kthread_ptr.type),kthread_ptr), to_string=True)
kthread_ptr = kthread_ptr["next"]
idx += 1
result = ("Found a Linked List with %d items:" % idx) + "\n"+ result
return result
def complete(self, text, word):
# We expect the argument passed to be a symbol so fallback to the
# internal tab-completion handler for symbols
return gdb.COMPLETE_SYMBOL
def invoke(self, args, from_tty):
# We can pass args here and use Python CLI utilities like argparse
# to do argument parsing
print("Args Passed: %s" % args)
if args:
ptr_val = gdb.parse_and_eval(args)
else:
ptr_val = gdb.parse_and_eval("currentThread")
try:
ptr_val["next"]
except:
print("Expected pointer argument with a next field")
return
print(self._print_list(ptr_val))
register_pretty_printer(None, CustomPrettyPrinterLocator(), replace=True)
KthreadListDumpCmd()
PhyMemDescListDumpCmd()
PrintStructC99Cmd()
ListDumpCmd()

2
tests/test.c
View File

@ -109,6 +109,7 @@ static void testAlloc(void)
void *alloc5 = testAllocNSet(1024);
void *alloc6 = testAllocNSet(1024);
void *alloc7 = testAllocNSet(4096);
void *alloc8 = testAllocNSet(8192);
free(alloc1);
free(alloc2);
free(alloc3);
@ -116,6 +117,7 @@ static void testAlloc(void)
free(alloc5);
free(alloc6);
free(alloc7);
free(alloc8);
void *alloc11 = testAllocNSet(1024);
void *alloc12 = testAllocNSet(1024);
void *alloc13 = testAllocNSet(1024);