The unwind table does not get populated on Win64 because a long is 32 bits and
an address is 64 bits. The following patch fixes this problem.
<<
2009-09-18 Pascal Obry <o...@adacore.com>
* unwind-dw2-fde.c (classify_object_over_fdes):
Properly cast the 1L constant. This is needed on
x86-64 Windows where a long is 32bits and an
address 64bits. With this path the unwind table
gets properly populated.
(add_fdes): Likewise.
(linear_search_fdes): Likewise.
*** gcc/unwind-dw2-fde.c.orig Thu Sep 17 20:25:26 2009
--- gcc/unwind-dw2-fde.c Wed Sep 16 20:34:05 2009
*************** classify_object_over_fdes (struct object
*** 634,640 ****
be representable. Assume 0 in the representable bits is NULL. */
mask = size_of_encoded_value (encoding);
if (mask < sizeof (void *))
! mask = (1L << (mask << 3)) - 1;
else
mask = -1;
--- 634,640 ----
be representable. Assume 0 in the representable bits is NULL. */
mask = size_of_encoded_value (encoding);
if (mask < sizeof (void *))
! mask = ((_Unwind_Ptr)1L << (mask << 3)) - 1;
else
mask = -1;
*************** add_fdes (struct object *ob, struct fde_
*** 695,701 ****
be representable. Assume 0 in the representable bits is NULL. */
mask = size_of_encoded_value (encoding);
if (mask < sizeof (void *))
! mask = (1L << (mask << 3)) - 1;
else
mask = -1;
--- 695,701 ----
be representable. Assume 0 in the representable bits is NULL. */
mask = size_of_encoded_value (encoding);
if (mask < sizeof (void *))
! mask = ((_Unwind_Ptr)1L << (mask << 3)) - 1;
else
mask = -1;
*************** linear_search_fdes (struct object *ob, c
*** 817,823 ****
be representable. Assume 0 in the representable bits is NULL. */
mask = size_of_encoded_value (encoding);
if (mask < sizeof (void *))
! mask = (1L << (mask << 3)) - 1;
else
mask = -1;
--- 817,823 ----
be representable. Assume 0 in the representable bits is NULL. */
mask = size_of_encoded_value (encoding);
if (mask < sizeof (void *))
! mask = ((_Unwind_Ptr)1L << (mask << 3)) - 1;
else
mask = -1;
>>
--
Summary: unwind table not properly populated
Product: gcc
Version: 4.3.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: p dot obry at wanadoo dot fr
GCC build triplet: i686-pc-mingw32
GCC host triplet: i686-pc-mingw32
GCC target triplet: x86_64-pc-mingw32
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41400
