#364: ptr_alignment 8 not honored, sparc 64bit broken
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Reporter: rurban | Owner: rurban
Type: bug | Status: assigned
Priority: blocker | Milestone: 1.0
Component: core | Version: trunk
Severity: release | Keywords:
Lang: | Patch:
Platform: other |
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Comment(by rurban):
I analyzed this further, but cannot test this.
See http://use.perl.org/~rurban/journal/38522
I believe 8-byte ptr_alignment cannot be supported as now, because we do
not enforce strict pairs of 4-byte data, as integer and opcodes. There can
be an uneven number, and then we get a SIGBUS.
We enforce 16-byte aligment at the start and end of segments and at end of
strings, but not with integer and opcodes.
So we should update the Sparc64 hints to use -xmemalign=4i, this is the
best we can guarantee (untested).
For the future we should discuss enforcing writing pairs of 4-byte data or
padding uneven ending 4-byte data with a pad of one byte.
It should also be tested if the pf_items (unsigned char*)stream++ are
valid with Sparc64.
--
Ticket URL: <https://trac.parrot.org/parrot/ticket/364#comment:7>
Parrot <https://trac.parrot.org/parrot/>
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