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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-06-08 03:08:30 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-06-10 17:06:31 +0300
commit96fab38e02792a109c0d35ca2154e95a7b4c8fcb (patch)
tree5bfce67d07a7136afd9aa5dcece1745ba10c3b74 /Documentation
parent33d71af84e64d28be278234bf5a152aee67c9013 (diff)
libcamera: ipa_module: Fix valgrind assertion failure
As the ELF parsing code uses non-const pointers to the ELF mapping, we have to map the module in private read-write mode. This causes issues with valgrind, due to the IPA manager mapping the module in shared read-only mode and valgrind having trouble loading debugging symbols later at dlopen time due to conflicting mappings. This is likely a bug in valgrind (reported as [1]), but we can easily work around it by using shared read-only mappings only. As such a mapping shouldn't be less efficient than private read-write mappings, switch the mapping type. This requires modifying the ELF parsing functions to operate on const memory, which is a good idea anyway as they're not supposed to modify the ELF file. [1] https://bugs.kde.org/show_bug.cgi?id=422601 Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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