Eschew global static object, to avoid issue with double-free #241
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Depends on dmlc/treelite#235, dmlc/treelite#236, dmlc/treelite#237, dmlc/treelite#240, dmlc/treelite#241, dmlc/treelite#242, dmlc/treelite#243 Depends on rapidsai/integration#201 Closes #2160 Closes #2795 Closes #2817 TODOs - [x] Get code review for dmlc/treelite#235 and dmlc/treelite#236 and merge them - [x] Get code review for dmlc/treelite#237 and merge them - [x] Merge dmlc/treelite#240, dmlc/treelite#241, dmlc/treelite#242, dmlc/treelite#243 - [x] Run tests locally - [x] Tag a new version of Treelite - [x] Release a new Conda package with the new version tag - [x] Update `meta.yml` and the integration package to use the new Treelite - [x] Run tests (this time build with new Conda package) Authors: - Hyunsu Cho <chohyu01@cs.washington.edu> Approvers: - AJ Schmidt (@ajschmidt8) - William Hicks (@wphicks) - John Zedlewski (@JohnZed) URL: #3316
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When I was working on rapidsai/cuml#3316, I noticed that both libraries
libtreelite.soandlibtreelite_runtime.socontain a reference to the global static constanttypeinfo_table. Since the constant was of typestd::unordered_map<std::string, std::string>, it contains a non-trivial destructor. When both libraries are unloaded, both will attempt to simultaneously free the constanttypeinfo_tablefrom memory, leading to double-free and thus undefined behavior.Fix: Eliminate the use of global static constant and replace it with a function instead. Allocating memory in the local scope is safer and does not risk the possibility of double-free.