#1324: :immediate sub cannot load_bytecode
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Reporter: jkeenan | Owner:
Type: todo | Status: new
Priority: normal | Milestone:
Component: core | Version: 1.8.0
Severity: medium | Keywords:
Lang: | Patch:
Platform: |
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When [http://rt.perl.org/rt3/Ticket/Display.html?id=60000 RT #60000] was
closed, chromatic indicated there would probably be a better way of
accomplishing its aim.
''"It's actually IMCC_INFO(interp)->ghash. In particular, constant folding
assigns register numbers to constant PMCs and STRINGs as addresses into
the constant table. That's good.''
''"Those constants are still around for code loaded from :immediate subs.
That's also good.
''"The problem is that the SymReg structures which represent those
constants keep their assigned register numbers. That's bad, because they
only get added to the bytecode if they don't already have register numbers
representing indices into the constant table.''
''"Thus, they don't get assigned. This is a problem when handling
parameters or return values. The PCC section of IMCC creates a
FixedIntegerArray to handle these arguments, and that's a constant PMC in
the bytecode. If this doesn't get created somehow (in the case I just
described), other parts of the PCC-handling code expect it's there and
throw an assertion if it isn't.''
''"The right fix is to walk IMCC_INFO(interp)->ghash and reset the color
of all constant SymRegs to -1 before running any pragma subs
(e_pbc_end_sub() in compilers/imcc/pbc.c), but r32633 is a quicker
workaround for now, to get this closed. I'll work on the prettier fix in
the next couple of days, unless someone beats me to it."''
This needs to be followed in Trac.
--
Ticket URL: <https://trac.parrot.org/parrot/ticket/1324>
Parrot <https://trac.parrot.org/parrot/>
Parrot Development
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