void *big_realloc(char *p, void *q, size_t n)
{
void *a;
size_t m;
if (debug_memory) {
mrlog("big_realloc(%s, %p, %ld)", p, q, n);
m = memsize*(n+PATTERN_SIZE);
} else {
m = memsize*n;
}
remove_chunk(q, p);
a = realloc(q, m);
if (debug > 2) {
mrlog("Reallocating %ld bytes (%p => %p) on behalf of %s",
(long)m, q, a, p);
}
if (a == NULL) {
mrlog("Allocation '%s' failed, exiting", p);
mrexit("Out of memory", EXIT_FAILURE);
}
store_chunk(a, m, p);
return a;
}
static void mem_enter_free(struct ls_state *ls, bool in_kernel, unsigned int base)
{
struct mem_state *m = in_kernel ? &ls->kern_mem : &ls->user_mem;
struct chunk *chunk;
assert(!m->in_mm_init);
if (m->in_alloc || m->in_free) {
FOUND_A_BUG(ls, "Free (in %s) reentered %s!", K_STR(in_kernel),
m->in_alloc ? "Malloc" : "Free");
}
chunk = remove_chunk(&m->heap, base);
if (base == 0) {
assert(chunk == NULL);
lsprintf(INFO, "Free() NULL (in %s); ok, I guess...\n",
K_STR(in_kernel));
} else if (chunk == NULL) {
struct hax *before;
struct hax *after;
chunk = find_freed_chunk(ls, base, in_kernel, &before, &after);
if (chunk != NULL) {
print_freed_chunk_info(chunk, before, after, NULL);
char buf[BUF_SIZE];
int len = scnprintf(buf, BUF_SIZE, "DOUBLE FREE (in %s)"
" of 0x%x!", K_STR(in_kernel), base);
FOUND_A_BUG_HTML_INFO(ls, buf, len, html_env,
print_freed_chunk_info(chunk, before,
after, html_env);
);
} else {
void big_free(char *p, void *q)
{
if (q == NULL) {
if (debug) mrlog("No need to free %p on behalf of %s", q, p);
return;
}
if (debug > 2) mrlog("Freeing %p on behalf of %s", q, p);
remove_chunk(q, p);
free(q);
}
/**
** Liberation d'une zone
**/
STATUS
smMemFree(void *ptr)
{
SM_MALLOC_CHUNK *oc, *c;
LOGDBG(("comLib:smMemLib: free 0x%x\n", (unsigned)ptr));
if (ptr == NULL) {
LOGDBG(("comLib:smMemLib: free(NULL)\n"));
return ERROR;
}
/* get a pointer to the header */
oc = (SM_MALLOC_CHUNK *)ptr - 1;
/* test for allocated bloc */
if (oc->next != MALLOC_MAGIC) {
/* what to do ? */
LOGDBG(("comLib:smMemLib: free(something not returned by malloc)\n"));
return ERROR;
}
/* insert free chunk in the free list */
insert_after(&smMemFreeList, oc);
/* test if can merge with preceding chunk */
c = smObjGlobalToLocal(oc->prev);
if (c != NULL &&
oc == (SM_MALLOC_CHUNK *)((char *)c + REAL_SIZE(c->length))) {
/* merge */
c->length += REAL_SIZE(oc->length);
remove_chunk(&smMemFreeList, oc);
oc = c;
}
/* test if can merge with following chunk */
c = smObjGlobalToLocal(oc->next);
if (c == (SM_MALLOC_CHUNK *)((char *)oc + REAL_SIZE(oc->length))) {
/* merge (=> oc->next != NULL) */
oc->length += REAL_SIZE(c->length);
remove_chunk(&smMemFreeList, c);
}
return OK;
}
/**
** malloc function
**/
static void *
internal_malloc(size_t size)
{
SM_MALLOC_CHUNK *c, *nc;
#ifdef MALLOC_ZERO_RETURNS_NULL
if (size == 0) {
return(NULL);
}
#endif
/* allocate at least MALLOC_MIN_CHUNK bytes and multiple of
sizeof (double) */
size = ROUNDUP(size, sizeof(double));
if (size < MALLOC_MIN_CHUNK) {
size = MALLOC_MIN_CHUNK;
}
/* look for a free chunk of size > size */
EVERY_FREE(c->length >= size);
if (c != NULL) {
/* found a chunk */
assert(c->signature == SIGNATURE);
if (c->length > size + REAL_SIZE(MALLOC_MIN_CHUNK)) {
/* split it */
nc = (SM_MALLOC_CHUNK *)((char *)c + c->length - size);
nc->length = size;
c->length -= REAL_SIZE(size);
nc->next = MALLOC_MAGIC;
nc->signature = SIGNATURE;
return((void *)(nc+1));
} else {
/* supress it from free list */
remove_chunk(&smMemFreeList, c);
c->next = MALLOC_MAGIC;
return((void *)(c+1));
}
} else {
errnoSet(ENOMEM);
return NULL;
}
} /* malloc */
void
sys$mem_init(L4_KernelInterfacePage_t *kip, struct vms$meminfo *mem_info,
vms$pointer pagesize)
{
static struct initial_obj static_objects[NUM_MI_OBJECTS];
static struct memdesc static_regions[NUM_MI_REGIONS];
static struct memdesc static_io_regions[NUM_MI_IOREGIONS];
static struct memdesc static_vm_regions[NUM_MI_VMREGIONS];
unsigned int i;
notice(SYSBOOT_I_SYSBOOT "initializing memory\n");
mem_info->regions = static_regions;
mem_info->max_regions = NUM_MI_REGIONS;
mem_info->num_regions = sys$find_memory_region(kip,
NUM_MI_REGIONS, VMS$MEM_RAM, VMS$MEM_IO, static_regions);
mem_info->io_regions = static_io_regions;
mem_info->max_io_regions = NUM_MI_IOREGIONS;
mem_info->num_io_regions = sys$find_memory_region(kip,
NUM_MI_IOREGIONS, VMS$MEM_IO, VMS$MEM_RAM, static_io_regions);
mem_info->vm_regions = static_vm_regions;
mem_info->max_vm_regions = NUM_MI_VMREGIONS;
mem_info->num_vm_regions = sys$find_memory_region(kip,
NUM_MI_VMREGIONS, VMS$MEM_VM, 0, static_vm_regions);
// Create a guard page
mem_info->num_vm_regions = sys$remove_chunk(mem_info->vm_regions,
mem_info->num_vm_regions, NUM_MI_VMREGIONS, 0, pagesize - 1);
mem_info->objects = static_objects;
mem_info->max_objects = NUM_MI_OBJECTS;
mem_info->num_objects = sys$find_initial_objects(kip,
NUM_MI_OBJECTS, static_objects);
// Remove any initial objects from free physical memory
for(i = 0; i < mem_info->num_objects; i++)
{
if (mem_info->objects[i].flags & VMS$IOF_PHYS)
{
mem_info->num_regions = sys$remove_chunk(mem_info->regions,
mem_info->num_regions, NUM_MI_REGIONS,
sys$page_round_down(mem_info->objects[i].base, pagesize),
sys$page_round_up(mem_info->objects[i].end, pagesize) - 1);
}
}
sys$set_flags(mem_info, VMS$IOF_APP, VMS$IOF_VIRT);
mem_info->swapper_base = 0;
for(i = 0; i < mem_info->num_regions; i++)
{
notice(MEM_I_AREA "$%016lX - $%016lX: physical memory\n",
mem_info->regions[i].base, mem_info->regions[i].end);
if (mem_info->swapper_base < mem_info->regions[i].end)
{
mem_info->swapper_base = mem_info->regions[i].end + 1;
}
}
for(i = 0; i < mem_info->num_vm_regions; i++)
{
notice(MEM_I_AREA "$%016lX - $%016lX: virtual memory\n",
mem_info->vm_regions[i].base, mem_info->vm_regions[i].end);
}
for(i = 0; i < mem_info->num_io_regions; i++)
{
notice(MEM_I_AREA "$%016lX - $%016lX: mapped IO\n",
mem_info->io_regions[i].base, mem_info->io_regions[i].end);
}
for(i = 0; i < mem_info->num_objects; i++)
{
if (mem_info->objects[i].flags & VMS$IOF_ROOT)
{
notice(MEM_I_AREA "$%016lX - $%016lX: kernel\n",
mem_info->objects[i].base, mem_info->objects[i].end);
}
else if (mem_info->objects[i].flags & VMS$IOF_RESERVED)
{
notice(MEM_I_AREA "$%016lX - $%016lX: reserved by kernel\n",
mem_info->objects[i].base, mem_info->objects[i].end);
}
else if (mem_info->objects[i].flags & VMS$IOF_BOOT)
{
notice(MEM_I_AREA "$%016lX - $%016lX: boot information\n",
mem_info->objects[i].base, mem_info->objects[i].end);
}
else
{
notice(MEM_I_AREA "$%016lX - $%016lX: modules\n",
mem_info->objects[i].base, mem_info->objects[i].end);
}
}
return;
}
static unsigned int
sys$find_memory_region(L4_KernelInterfacePage_t *kip,
unsigned int max, int memory_type, int except_type,
struct memdesc *mem_desc)
{
int covered;
int mem_desc_type;
L4_Word_t high;
L4_Word_t low;
L4_Word_t type;
unsigned int i;
unsigned int j;
unsigned int pos;
pos = 0;
for(i = 0; i < kip->MemoryInfo.n; i++)
{
if (sys$find_memory_info(kip, i, &low, &high, &type))
{ // Physical memory
switch(type)
{
case L4_ConventionalMemoryType:
mem_desc_type = VMS$MEM_RAM;
break;
case L4_SharedMemoryType:
case L4_DedicatedMemoryType:
mem_desc_type = VMS$MEM_IO;
break;
default:
mem_desc_type = VMS$MEM_OTHER;
break;
}
}
else
{ // No physical memory
mem_desc_type = VMS$MEM_VM;
}
if (mem_desc_type & memory_type)
{
// Add it to the array
covered = 0;
PANIC(pos >= (max - 1));
for(j = 0; j < pos; j++)
{
if ((low >= mem_desc[j].base) &&
(low < mem_desc[j].end) &&
(high >= mem_desc[j].end))
{
mem_desc[j].end = high;
covered = 1;
break;
}
else if ((low <= mem_desc[j].base) &&
(high <= mem_desc[j].end) &&
(high > mem_desc[j].base))
{
mem_desc[j].base = high + 1;
covered = 1;
break;
}
else if ((low > mem_desc[j].base) &&
(low < mem_desc[j].end) &&
(high < mem_desc[j].end) &&
(high > mem_desc[j].base))
{
covered = 1;
break;
}
}
if (covered == 0)
{
mem_desc[pos].base = low;
mem_desc[pos].end = high;
pos++;
}
}
else if (mem_desc_type & except_type)
{
pos = sys$remove_chunk(mem_desc, pos, max, low, high);
}
}
// Return number of actual descriptors we have copied.
return(pos);
}