[Qemu-devel] [PATCH] Wrapper around dpy_copy to fix segfault with -vnc option

[Jan Niehusmann <jan@gondor.com>]

On Mon, Sep 22, 2008 at 11:15:04PM +0200, andrzej zaborowski wrote:
> Yes, I don't think hw/ code should be concerned with what console is
> active.  Logically the dpy_ functions should take the pointer returned
> from graphic_console_init() as first parameter.
> 
> Please also check the code is formatted consistently with qemu.
> 
> I didn't receive Jan's message but the check seems to not be enough
> because there can be multiple graphical consoles with different sizes
> - if I'm guessing correctly what this patch tries to fix.

Based on these comments I had another look at the code. If there can
be multiple graphical consoles, the only sensible test is 'console
== active_console' where console must be provided by the caller. So,
indeed, a pointer to the console must be provided instead of a pointer
to the DisplayState.

To make function names consistent, I called the function qemu_console_copy
in analogy to qemu_console_resize (which is a similar wrapper around
dpy_resize).


Signed-off-by: Jan Niehusmann <jan@gondor.com>


diff --git a/qemu/console.c b/qemu/console.c
index 785710a..1f4907c 100644
--- a/qemu/console.c
+++ b/qemu/console.c
@@ -1343,3 +1343,10 @@ void qemu_console_resize(QEMUConsole *console, int width, int height)
         }
     }
 }
+
+void qemu_console_copy(QEMUConsole *console, int src_x, int src_y, int dst_x, int dst_y, int w, int h) {
+    if ( active_console == console && console->ds->dpy_copy ) {
+        console->ds->dpy_copy(console->ds, src_x, src_y, dst_x, dst_y, w, h);
+    }
+}
+
diff --git a/qemu/console.h b/qemu/console.h
index 7b8571f..05e7e64 100644
--- a/qemu/console.h
+++ b/qemu/console.h
@@ -140,6 +140,7 @@ CharDriverState *text_console_init(DisplayState *ds, const char *p);
 void console_select(unsigned int index);
 void console_color_init(DisplayState *ds);
 void qemu_console_resize(QEMUConsole *console, int width, int height);
+void qemu_console_copy(QEMUConsole *console, int src_x, int src_y, int dst_x, int dst_y, int w, int h);
 
 /* sdl.c */
 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame);
diff --git a/qemu/hw/cirrus_vga.c b/qemu/hw/cirrus_vga.c
index 0cf5b24..4f3aef9 100644
--- a/qemu/hw/cirrus_vga.c
+++ b/qemu/hw/cirrus_vga.c
@@ -775,13 +775,13 @@ static void cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h)
 		      s->cirrus_blt_width, s->cirrus_blt_height);
 
     if (notify)
-	s->ds->dpy_copy(s->ds,
-			sx, sy, dx, dy,
-			s->cirrus_blt_width / depth,
-			s->cirrus_blt_height);
+	qemu_console_copy(s->console,
+			  sx, sy, dx, dy,
+			  s->cirrus_blt_width / depth,
+			  s->cirrus_blt_height);
 
     /* we don't have to notify the display that this portion has
-       changed since dpy_copy implies this */
+       changed since qemu_console_copy implies this */
 
     if (!notify)
 	cirrus_invalidate_region(s, s->cirrus_blt_dstaddr,
diff --git a/qemu/hw/vmware_vga.c b/qemu/hw/vmware_vga.c
index efbcd96..625cd83 100644
--- a/qemu/hw/vmware_vga.c
+++ b/qemu/hw/vmware_vga.c
@@ -384,7 +384,7 @@ static inline void vmsvga_copy_rect(struct vmsvga_state_s *s,
 
 # ifdef DIRECT_VRAM
     if (s->ds->dpy_copy)
-        s->ds->dpy_copy(s->ds, x0, y0, x1, y1, w, h);
+        qemu_console_copy(s->console, x0, y0, x1, y1, w, h);
     else
 # endif
     {