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a8c1253b6f
msgpack lib missed using lua_checkstack and so on rare cases overflow the stack by at most 2 elements. This is a violation of the Lua C API. Notice that Lua allocates additional 5 more elements on top of lua->stack_last so Redis does not access an invalid memory. But it is an API violation and we should avoid it. This PR also added a new Lua compilation option. The new option can be enable using environment variable called LUA_DEBUG. If set to `yes` (by default `no`), Lua will be compiled without optimizations and with debug symbols (`-O0 -g`). In addition, in this new mode, Lua will be compiled with the `-DLUA_USE_APICHECK` flag that enables extended Lua C API validations. In addition, set LUA_DEBUG=yes on daily valgrind flow so we will be able to catch Lua C API violations in the future. |
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README for Lua 5.1 See INSTALL for installation instructions. See HISTORY for a summary of changes since the last released version. * What is Lua? ------------ Lua is a powerful, light-weight programming language designed for extending applications. Lua is also frequently used as a general-purpose, stand-alone language. Lua is free software. For complete information, visit Lua's web site at http://www.lua.org/ . For an executive summary, see http://www.lua.org/about.html . Lua has been used in many different projects around the world. For a short list, see http://www.lua.org/uses.html . * Availability ------------ Lua is freely available for both academic and commercial purposes. See COPYRIGHT and http://www.lua.org/license.html for details. Lua can be downloaded at http://www.lua.org/download.html . * Installation ------------ Lua is implemented in pure ANSI C, and compiles unmodified in all known platforms that have an ANSI C compiler. In most Unix-like platforms, simply do "make" with a suitable target. See INSTALL for detailed instructions. * Origin ------ Lua is developed at Lua.org, a laboratory of the Department of Computer Science of PUC-Rio (the Pontifical Catholic University of Rio de Janeiro in Brazil). For more information about the authors, see http://www.lua.org/authors.html . (end of README)