Add RTLD_DEEPBIND flag to dlopen mode #2247
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mattleibow
approved these changes
Sep 10, 2022
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Thanks for this PR! Always great to see SkiaSharp getting better! |
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Description of Change
By default, internal dependences of a library loaded with
dlopenare resolved using the global lookup scope first. If there are already matched symbols in the global scope, internal calls in the library that are supposed to use its local functions, will be linked to some external code, which is usually results in segmentation faults when the library is used. This is particularly true for thelibharfbuzz.so.0, that is often present in the system, exports the same symbols aslibHarfBuzzSharp.soand is implicitly used by some dependencies ofmonoordotnet. To avoid such conflicts, there is a flag RTLD_DEEPBIND inglibcsince version 2.3.4. Earlier versions do not check the mode argument for unknown flags, andmusldoes not check it either. So just adding this flag to the mode appears to be quite harmless.Bugs Fixed
API Changes
None.
Behavioral Changes
None.
Required skia PR
None.
PR Checklist