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Code Issues Releases Activity

- Improve readability of sys_obreak().

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Suggested by:	alc
Reviewed by:	alc
Approved by:	kib (mentor)
MFC after:	1 week
This commit is contained in:
Andrey Zonov 2013-01-11 09:58:35 +00:00
parent ddd6b3fc33
commit cde4a72547
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=245296
1 changed files with 21 additions and 22 deletions
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43
sys/vm/vm_unix.c
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@ -76,6 +76,7 @@ sys_obreak(td, uap)
struct obreak_args *uap;
{
struct vmspace *vm = td->td_proc->p_vmspace;
vm_map_t map = &vm->vm_map;
vm_offset_t new, old, base;
rlim_t datalim, lmemlim, vmemlim;
int prot, rv;
@ -90,7 +91,7 @@ sys_obreak(td, uap)
do_map_wirefuture = FALSE;
new = round_page((vm_offset_t)uap->nsize);
vm_map_lock(&vm->vm_map);
vm_map_lock(map);
base = round_page((vm_offset_t) vm->vm_daddr);
old = base + ctob(vm->vm_dsize);
@ -103,7 +104,7 @@ sys_obreak(td, uap)
error = ENOMEM;
goto done;
}
if (new > vm_map_max(&vm->vm_map)) {
if (new > vm_map_max(map)) {
error = ENOMEM;
goto done;
}
@ -117,14 +118,14 @@ sys_obreak(td, uap)
goto done;
}
if (new > old) {
if (!old_mlock && vm->vm_map.flags & MAP_WIREFUTURE) {
if (ptoa(pmap_wired_count(vm->vm_map.pmap)) +
if (!old_mlock && map->flags & MAP_WIREFUTURE) {
if (ptoa(pmap_wired_count(map->pmap)) +
(new - old) > lmemlim) {
error = ENOMEM;
goto done;
}
}
if (vm->vm_map.size + (new - old) > vmemlim) {
if (map->size + (new - old) > vmemlim) {
error = ENOMEM;
goto done;
}
@ -137,22 +138,21 @@ sys_obreak(td, uap)
goto done;
}
error = racct_set(td->td_proc, RACCT_VMEM,
vm->vm_map.size + (new - old));
map->size + (new - old));
if (error != 0) {
racct_set_force(td->td_proc, RACCT_DATA, old - base);
PROC_UNLOCK(td->td_proc);
error = ENOMEM;
goto done;
}
if (!old_mlock && vm->vm_map.flags & MAP_WIREFUTURE) {
if (!old_mlock && map->flags & MAP_WIREFUTURE) {
error = racct_set(td->td_proc, RACCT_MEMLOCK,
ptoa(pmap_wired_count(vm->vm_map.pmap)) +
(new - old));
ptoa(pmap_wired_count(map->pmap)) + (new - old));
if (error != 0) {
racct_set_force(td->td_proc, RACCT_DATA,
old - base);
racct_set_force(td->td_proc, RACCT_VMEM,
vm->vm_map.size);
map->size);
PROC_UNLOCK(td->td_proc);
error = ENOMEM;
goto done;
@ -167,16 +167,15 @@ sys_obreak(td, uap)
prot |= VM_PROT_EXECUTE;
#endif
#endif
rv = vm_map_insert(&vm->vm_map, NULL, 0, old, new,
prot, VM_PROT_ALL, 0);
rv = vm_map_insert(map, NULL, 0, old, new, prot, VM_PROT_ALL, 0);
if (rv != KERN_SUCCESS) {
#ifdef RACCT
PROC_LOCK(td->td_proc);
racct_set_force(td->td_proc, RACCT_DATA, old - base);
racct_set_force(td->td_proc, RACCT_VMEM, vm->vm_map.size);
if (!old_mlock && vm->vm_map.flags & MAP_WIREFUTURE) {
racct_set_force(td->td_proc, RACCT_VMEM, map->size);
if (!old_mlock && map->flags & MAP_WIREFUTURE) {
racct_set_force(td->td_proc, RACCT_MEMLOCK,
ptoa(pmap_wired_count(vm->vm_map.pmap)));
ptoa(pmap_wired_count(map->pmap)));
}
PROC_UNLOCK(td->td_proc);
#endif
@ -193,13 +192,13 @@ sys_obreak(td, uap)
*
* XXX If the pages cannot be wired, no error is returned.
*/
if ((vm->vm_map.flags & MAP_WIREFUTURE) == MAP_WIREFUTURE) {
if ((map->flags & MAP_WIREFUTURE) == MAP_WIREFUTURE) {
if (bootverbose)
printf("obreak: MAP_WIREFUTURE set\n");
do_map_wirefuture = TRUE;
}
} else if (new < old) {
rv = vm_map_delete(&vm->vm_map, new, old);
rv = vm_map_delete(map, new, old);
if (rv != KERN_SUCCESS) {
error = ENOMEM;
goto done;
@ -208,19 +207,19 @@ sys_obreak(td, uap)
#ifdef RACCT
PROC_LOCK(td->td_proc);
racct_set_force(td->td_proc, RACCT_DATA, new - base);
racct_set_force(td->td_proc, RACCT_VMEM, vm->vm_map.size);
if (!old_mlock && vm->vm_map.flags & MAP_WIREFUTURE) {
racct_set_force(td->td_proc, RACCT_VMEM, map->size);
if (!old_mlock && map->flags & MAP_WIREFUTURE) {
racct_set_force(td->td_proc, RACCT_MEMLOCK,
ptoa(pmap_wired_count(vm->vm_map.pmap)));
ptoa(pmap_wired_count(map->pmap)));
}
PROC_UNLOCK(td->td_proc);
#endif
}
done:
vm_map_unlock(&vm->vm_map);
vm_map_unlock(map);
if (do_map_wirefuture)
(void) vm_map_wire(&vm->vm_map, old, new,
(void) vm_map_wire(map, old, new,
VM_MAP_WIRE_USER|VM_MAP_WIRE_NOHOLES);
return (error);