win32: pair qemu_memalign() with qemu_vfree()

Win32 suffers from a very big memory leak when dealing with SCSI devices. Each read/write request allocates memory with qemu_memalign (ie VirtualAlloc) but frees it with qemu_free (ie free).
Pair all qemu_memalign() calls with qemu_vfree() to prevent such leaks.

Signed-off-by Herve Poussineau<[email protected]>

---
  block.c           |    2 +-
  block/raw-posix.c |    2 +-
  exec.c            |    2 +-
  hw/scsi-disk.c    |    2 +-
  qemu-nbd.c        |    2 +-
  5 files changed, 5 insertions(+), 5 deletions(-)

block.c +1 -1

index 73c26ec..6e440b7 100644
@@ -1629,7 +1629,7 @@ static void multiwrite_user_cb(MultiwriteCB *mcb)
      for (i = 0; i<  mcb->num_callbacks; i++) {
          mcb->callbacks[i].cb(mcb->callbacks[i].opaque, mcb->error);
          qemu_free(mcb->callbacks[i].free_qiov);
-        qemu_free(mcb->callbacks[i].free_buf);
+        qemu_vfree(mcb->callbacks[i].free_buf);
      }
  }
 

block/raw-posix.c +1 -1

index 52bbcda..b4ff841 100644
@@ -595,7 +595,7 @@ static void raw_close(BlockDriverState *bs)
          close(s->fd);
          s->fd = -1;
          if (s->aligned_buf != NULL)
-            qemu_free(s->aligned_buf);
+            qemu_vfree(s->aligned_buf);
      }
  }
 

exec.c +1 -1

index 1190591..76831a1 100644
@@ -3309,7 +3309,7 @@ void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len,
      if (is_write) {
          cpu_physical_memory_write(bounce.addr, bounce.buffer, access_len);
      }
-    qemu_free(bounce.buffer);
+    qemu_vfree(bounce.buffer);
      bounce.buffer = NULL;
      cpu_notify_map_clients();
  }

hw/scsi-disk.c +1 -1

index e3924de..b34fbaa 100644
@@ -81,7 +81,7 @@ static SCSIDiskReq *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
 
  static void scsi_remove_request(SCSIDiskReq *r)
  {
-    qemu_free(r->iov.iov_base);
+    qemu_vfree(r->iov.iov_base);
      scsi_req_free(&r->req);
  }
 

qemu-nbd.c +1 -1

index 4463679..eac0c21 100644
@@ -469,7 +469,7 @@ int main(int argc, char **argv)
              }
          }
      } while (persistent || nb_fds>  1);
-    qemu_free(data);
+    qemu_vfree(data);
 
      close(sharing_fds[0]);
      bdrv_close(bs);