0008647: luajit2 - x86_64 build and runtime issues (unknown errors, missing libs, and stack overflows)

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Category

Severity

Reproducibility

Date Submitted

Last Update

0008647

[DCSS] Bug Report

minor

always

2014-06-05 00:19

2014-07-07 01:02

Reporter

johnnyzero

View Status

public

Assigned To

Priority

normal

Resolution

open

Status

new

Product Branch

0.15 ancient branch

Summary

0008647: luajit2 - x86_64 build and runtime issues (unknown errors, missing libs, and stack overflows)

Description

Luajit2 support for x86_64 systems was recently added (0008641 [1]), so I decided to try out a build.

[1] commit: http://s-z.org/neil/git/?p=crawl.git;a=commit;h=97cf85e3ad4f3c109adc8a6e0f1ed4163876178b [^]

A few problems were encountered:

When compiled against the current default luajit2 submodule checkout, the executable fails with a "Unknown error compiling chunk" message when processing .des files.

When compiling against 'crawl-20140511' luajit2 submodule branch, crawl fails to link due to a missing '-ldl' library

When successfully linked against 'crawl-20140511' luajit2 by supplying -ldl, the resulting executable fails to parse a number of .des files due to stack overflows. I was able to finally run crawl from distclean without error with a stack size of 64MiB (stack overflows occurred for stack limits of 8MiB [my system default], 16MiB, and 32MiB)

The build system used is running Debian Jessie x86_64 with gcc (Debian 4.8.2-21) 4.8.2. I have not yet tested a luajit2 build for i686 or other cross targets. The stack limit was set via 'ulimit -s 65536' in the bash session used to build and launch crawl.

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Notes
(0026693) johnnyzero (reporter) 2014-07-07 01:02 edited on: 2014-07-07 05:54	Update: * The luajit stack overflow is not limited to x86_64-linux-gnu. On a win32 i686-w64-mingw32 luajit-enabled compile, the same stack overflows occur, except that maximum stack size of 512MiB is needed to parse all .des files without error. This is most likely due to the recursive processing of .des files and the way luajit handles function calls. (see source/dat/dlua/layout/zonify.lua:walk)

Issue History
Date Modified	Username	Field	Change
2014-06-05 00:19	johnnyzero	New Issue
2014-06-05 00:48	neil	Description Updated
2014-07-07 01:02	johnnyzero	Note Added: 0026693
2014-07-07 05:54	johnnyzero	Note Edited: 0026693

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