|author||Rich Felker <firstname.lastname@example.org>||2012-10-04 21:08:53 -0400|
|committer||Rich Felker <email@example.com>||2012-10-04 21:08:53 -0400|
remove freeing of dynamic linker data when dlopen/dlsym are not used
this was an optimization to save/recover a minimal amount of extra memory for use by malloc, that's becoming increasingly costly to keep around. freeing this data: 1. breaks debugging with gdb (it can't find library symbols) 2. breaks thread-local storage in shared libraries it would be possible to disable freeing when TLS is used, but in addition to the above breakages, tracking whether dlopen/dlsym is used adds a cost to every symbol lookup, possibly making program startup slower for large programs. combined with the complexity, it's not worth it. we already save/recover plenty of memory in the dynamic linker with reclaim_gaps.
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