tag 613642 patch
kthxbye
On Wed, Feb 16, 2011 at 13:56:52 +0100, Julien Cristau wrote:
> gx_semaphore_alloc() allocates a 8-byte-aligned gx_semaphore_t, which
> means that sema->native is *not* 8-byte-aligned (its offset is 4),
> whereas alignof(pt_semaphore_t) == 8. The easiest fix is probably to
> make sure gp_semaphore has maximal alignment.
>
Quick test with the following patch seems to work (using Stéphane's test
case).
--- ghostscript-9.01~dfsg.orig/base/gpsync.h
+++ ghostscript-9.01~dfsg/base/gpsync.h
@@ -28,8 +28,11 @@
* control to proceed iff the number of signals since semaphore creation
* is greater than the number of waits.
*/
-typedef struct {
- void *dummy_;
+/* Needs to have maximum alignment */
+typedef union {
+ void *dummy1;
+ double dummy2;
+ long dummy3;
} gp_semaphore;
uint gp_semaphore_sizeof(void);
Cheers,
Julien
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