How do I find out which info table a continuation belongs to?
Ömer Sinan Ağacan
omeragacan at gmail.com
Sun Feb 10 07:49:06 UTC 2019
I'm currently working on a bug and one of the things I often want to know is
what's on the stack. The problem is I can't see labels of continuations so the
information is really useless. Example:
>>> call printStack(((StgTSO*)0x42000e0198)->stackobj)
0x42000c8788: RET_SMALL (0x512d70)
0x42000c8790: RET_SMALL (0x40edf0)
stk (0x42000c8798) = 0x7b3938
(I modified the printer to print stack locations when printing stacks)
Here I need to know which info table the RET_SMALLs return to. Normally I do
this for other kinds of closures:
>>> print ((StgClosure*)...)->header.info
$15 = (const StgInfoTable *) 0x404dc0 <Main_nats_info>
But for continuations that doesn't work:
>>> print ((StgClosure*)0x42000c8788)->header.info
$11 = (const StgInfoTable *) 0x512d80
>>> info symbol 0x512d80
No symbol matches 0x512d80.
Anyone know how to make this work? Can I maybe mark the continuations label in
the generated assembly somehow to make those labels available in gdb?
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