ibuf: don't clash with tarantool's ibuf_*() symbols #111
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I want to proceed with it after PR #102. |
ligurio
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Mar 29, 2022
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Just copy and change includes. It is necessary to change function names in a next commit. The source is the small version, which is bundled into the module: 1.1-63-g3df5050. Part of #59
Part of #59
See [1] for the problem root and [2] for analysis. In brief: `ibuf_*()` symbols may clash with the same named symbols in tarantool, so it worth to rename them to avoid effects of different binary layouts: assertion fails and memory corruptions. For example, `ibuf_reserve_slow()` calls `slab_get()` and `slab_put()`. If something will be changed in tarantool's slab cache, we can meet problems in the module. This patch just renames the `ibuf_*()` functions. It is the most simple and durable workaround of the problem. It is likely not necessary to rename inline functions, but since I'm not dead sure, I renamed them all. It is the last known problem from #59. All others are confirmed as safe to ignore if we'll keep current libsmall version in the module (see the analysis in [2]). [1]: tarantool/tarantool#6873 [2]: #59 (comment) Fixes #59
I wrote it mainly to clarify when the hack could be removed. Follows up #59
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Rebased after PR #102. |
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Copy
ibuf.candibuf.hfrom small into the module's code and rename the functions tomemcached_ibuf_*().See tarantool/tarantool#6873 for the root problem and #59 (comment) for analysis.
ibuf_*()symbols may clash with the same named symbols in tarantool, so it worth to rename them to avoid effects of different binary layouts: assertion fails and memory corruptions.It is the last known problem from #59. All others are confirmed as safe to ignore if we'll keep current libsmall version in the module (see the issue).
More details can be found in the commit messages.
Fixes #59