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codegen: explicit allocate codebuffer with proper permissions
author
Bernhard Urban
<lewurm@gmail.com>
Mon, 30 Apr 2012 08:16:37 +0000
(10:16 +0200)
committer
Bernhard Urban
<lewurm@gmail.com>
Mon, 30 Apr 2012 08:16:37 +0000
(10:16 +0200)
we had weird issues, when upgrading ghc:
http://stackoverflow.com/questions/
10341943
/ghc-segmentation-fault-under-strange-conditions
therefore, this fix: use `mprotect' to set the codebuffer explicitly executable.
`mprotect' requires aligned memory, so we use `memalign'.
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