From: "Michael S. Tsirkin" <mst@redhat.com>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>
Subject: [Qemu-devel] [RFC v2 1/5] vmstate: reduce code duplication
Date: Mon, 24 Mar 2014 16:37:51 +0200 [thread overview]
Message-ID: <1395671853-2685-2-git-send-email-mst@redhat.com> (raw)
In-Reply-To: <1395671853-2685-1-git-send-email-mst@redhat.com>
move size offset and number of elements math out
to functions, to reduce code duplication.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
vmstate.c | 97 ++++++++++++++++++++++++++++++++++-----------------------------
1 file changed, 52 insertions(+), 45 deletions(-)
diff --git a/vmstate.c b/vmstate.c
index c61b0e5..18b3732 100644
--- a/vmstate.c
+++ b/vmstate.c
@@ -9,6 +9,50 @@ static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
void *opaque);
+static int vmstate_n_elems(void *opaque, VMStateField *field)
+{
+ int n_elems = 1;
+
+ if (field->flags & VMS_ARRAY) {
+ n_elems = field->num;
+ } else if (field->flags & VMS_VARRAY_INT32) {
+ n_elems = *(int32_t *)(opaque+field->num_offset);
+ } else if (field->flags & VMS_VARRAY_UINT32) {
+ n_elems = *(uint32_t *)(opaque+field->num_offset);
+ } else if (field->flags & VMS_VARRAY_UINT16) {
+ n_elems = *(uint16_t *)(opaque+field->num_offset);
+ } else if (field->flags & VMS_VARRAY_UINT8) {
+ n_elems = *(uint8_t *)(opaque+field->num_offset);
+ }
+
+ return n_elems;
+}
+
+static int vmstate_size(void *opaque, VMStateField *field)
+{
+ int size = field->size;
+
+ if (field->flags & VMS_VBUFFER) {
+ size = *(int32_t *)(opaque+field->size_offset);
+ if (field->flags & VMS_MULTIPLY) {
+ size *= field->size;
+ }
+ }
+
+ return size;
+}
+
+static void *vmstate_base_addr(void *opaque, VMStateField *field)
+{
+ void *base_addr = opaque + field->offset;
+
+ if (field->flags & VMS_POINTER) {
+ base_addr = *(void **)base_addr + field->start;
+ }
+
+ return base_addr;
+}
+
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
void *opaque, int version_id)
{
@@ -38,30 +82,10 @@ int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
field->field_exists(opaque, version_id)) ||
(!field->field_exists &&
field->version_id <= version_id)) {
- void *base_addr = opaque + field->offset;
- int i, n_elems = 1;
- int size = field->size;
-
- if (field->flags & VMS_VBUFFER) {
- size = *(int32_t *)(opaque+field->size_offset);
- if (field->flags & VMS_MULTIPLY) {
- size *= field->size;
- }
- }
- if (field->flags & VMS_ARRAY) {
- n_elems = field->num;
- } else if (field->flags & VMS_VARRAY_INT32) {
- n_elems = *(int32_t *)(opaque+field->num_offset);
- } else if (field->flags & VMS_VARRAY_UINT32) {
- n_elems = *(uint32_t *)(opaque+field->num_offset);
- } else if (field->flags & VMS_VARRAY_UINT16) {
- n_elems = *(uint16_t *)(opaque+field->num_offset);
- } else if (field->flags & VMS_VARRAY_UINT8) {
- n_elems = *(uint8_t *)(opaque+field->num_offset);
- }
- if (field->flags & VMS_POINTER) {
- base_addr = *(void **)base_addr + field->start;
- }
+ void *base_addr = vmstate_base_addr(opaque, field);
+ int i, n_elems = vmstate_n_elems(opaque, field);
+ int size = vmstate_size(opaque, field);
+
for (i = 0; i < n_elems; i++) {
void *addr = base_addr + size * i;
@@ -103,27 +127,10 @@ void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
while (field->name) {
if (!field->field_exists ||
field->field_exists(opaque, vmsd->version_id)) {
- void *base_addr = opaque + field->offset;
- int i, n_elems = 1;
- int size = field->size;
-
- if (field->flags & VMS_VBUFFER) {
- size = *(int32_t *)(opaque+field->size_offset);
- if (field->flags & VMS_MULTIPLY) {
- size *= field->size;
- }
- }
- if (field->flags & VMS_ARRAY) {
- n_elems = field->num;
- } else if (field->flags & VMS_VARRAY_INT32) {
- n_elems = *(int32_t *)(opaque+field->num_offset);
- } else if (field->flags & VMS_VARRAY_UINT32) {
- n_elems = *(uint32_t *)(opaque+field->num_offset);
- } else if (field->flags & VMS_VARRAY_UINT16) {
- n_elems = *(uint16_t *)(opaque+field->num_offset);
- } else if (field->flags & VMS_VARRAY_UINT8) {
- n_elems = *(uint8_t *)(opaque+field->num_offset);
- }
+ void *base_addr = vmstate_base_addr(opaque, field);
+ int i, n_elems = vmstate_n_elems(opaque, field);
+ int size = vmstate_size(opaque, field);
+
if (field->flags & VMS_POINTER) {
base_addr = *(void **)base_addr + field->start;
}
--
MST
next prev parent reply other threads:[~2014-03-24 14:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-24 14:37 [Qemu-devel] [RFC v2 0/5] state loading security issues Michael S. Tsirkin
2014-03-24 14:37 ` Michael S. Tsirkin [this message]
2014-03-24 15:56 ` [Qemu-devel] [RFC v2 1/5] vmstate: reduce code duplication Dr. David Alan Gilbert
2014-03-24 14:37 ` [Qemu-devel] [RFC v2 2/5] vmstate: add VMS_NONE Michael S. Tsirkin
2014-03-24 17:07 ` Dr. David Alan Gilbert
2014-03-24 21:51 ` Michael S. Tsirkin
2014-03-24 14:38 ` [Qemu-devel] [RFC v2 3/5] vmstate: add VMS_MUST_EXIST Michael S. Tsirkin
2014-03-24 16:21 ` Michael S. Tsirkin
2014-03-24 17:11 ` Dr. David Alan Gilbert
2014-03-24 21:50 ` Michael S. Tsirkin
2014-03-25 9:23 ` Dr. David Alan Gilbert
2014-03-25 9:27 ` Michael S. Tsirkin
2014-03-24 14:38 ` [Qemu-devel] [RFC v2 4/5] vmstate: add VMSTATE_TEST Michael S. Tsirkin
2014-03-24 14:38 ` [Qemu-devel] [RFC v2 5/5] hpet: fix buffer overrun on invalid state load Michael S. Tsirkin
2014-03-24 16:25 ` [Qemu-devel] [RFC v2 0/5] state loading security issues Michael S. Tsirkin
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