Changeset 14825

Timestamp:

Jun 14, 2011, 7:54:09 AM (10 years ago)

Author:

gb

Message:

If pc_luser_xp() finds that the target thread was interrupted while
consing at the branch around the alloc_trap, the branch would have
been taken, and a uvector was being allocated, we need to (as the
comment says) "slap the header on the new uvector". On x8632, the
header's in xmm0, not imm0.

(This has been broken forever; apparently, it's very hard to reproduce.)

Fixes ticket:868.

File:

• trunk/source/lisp-kernel/x86-exceptions.c (modified) (1 diff)

trunk/source/lisp-kernel/x86-exceptions.c

@@ -2624 +2624 @@
             /* Slap the header on the new uvector */
             new_vector = xpGPR(xp,Iallocptr);
+#ifdef X8664
             deref(new_vector,0) = xpGPR(xp,Iimm0);
+#else
+            deref(new_vector,0) = xpMMXreg(xp,Imm0);
+#endif
             xpPC(xp) += sizeof(set_allocptr_header_instruction);
           }