new 'structview' PMC does not work on bigendian systems

[jkeenan]

This test file was recently added (Feb 20) to master. It is causing test failures on Darwin/PPC:

t/pmc/structview.t                        (Wstat: 256 Tests: 4 Failed: 0)
  Non-zero exit status: 1
  Parse errors: Bad plan.  You planned 16 tests but ran 4.

On this platform, I use gcc for cc and g++ for ld and link.

I should also note that when I do an all-g++ build on linux/i386, I get massive numbers of warnings in ./src/pmc/structview.pmc. See:  http://nopaste.snit.ch/34304. This PMC was also added for the first time on Feb 20. Perhaps it's not quite ready for prime time.

Assigning ticket to files' author.

Thank you very much.

kid51

[jkeenan]

ok 1 - 8 bits in one byte
ok 2 - single byte is byte-aligned
ok 3 - byte-aligned single byte is single byte when aligned
ok 4 - allocate an instance
Unaligned write not yet implemented for big-endian systems
current instr.: 'test_bit_struct' pc 203 (t/pmc/structview.t:45)
called from Sub 'main' pc 38 (t/pmc/structview.t:11)

[jkeenan]

Darwin/PPC:

$ grep -n endian lib/Parrot/Config/Generated.pm 
74:  'bigendian' => 1,

Linux/i386:

$ grep -n endian lib/Parrot/Config/Generated.pm
76:  'bigendian' => 0,

If the structview PMC can't work on bigendian systems, then it probably should not be included in master.

Thank you very much.

kid51

[plobsing]

Bigendian Patch

[plobsing]

Please try be.patch. The BE/LE difference is a holdover from attempting to do signed, unaligned access, which was abandonned. BE/LE code for unsigned, unaligned access should be identical.

[jkeenan]

Better, but still a ways to go:

t/pmc/structview.t             (Wstat: 0 Tests: 16 Failed: 1)
  Failed test:  8

So now the test file is completing with one error. Surprisingly, here on Darwin/PPC we simply get a failure on test 8. But, as reported in TT #2030, we get a PANIC there!

kid51

[plobsing]

Replying to jkeenan:

Better, but still a ways to go: {{{ t/pmc/structview.t (Wstat: 0 Tests: 16 Failed: 1) Failed test: 8 }}}

This problem should be addressed in b11a3ca.

So now the test file is completing with one error. Surprisingly, here on Darwin/PPC we simply get a failure on test 8. But, as reported in TT #2030, we get a PANIC there! kid51

[jkeenan]

make test PASS for me at 4629233bb1d1. No objection from me to closing the ticket.

Thank you very much.

kid51