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In issue #1406, Lev Petrushchak reported a nasty memory leak on Alpine since haproxy 2.4 when using Lua, that memory profiling didn't detect. After inspecting the code and Lua's code, it appeared that Lua's default allocator does an explicit free() on size zero, while since 2.4 commit d36c7fa5e ("MINOR: lua: simplify hlua_alloc() to only rely on realloc()"), haproxy only calls realloc(ptr,0) that performs a free() on glibc but not on other systems as it's not required by POSIX... This patch reinstalls the explicit test for nsize==0 to call free(). Thanks to Lev for the very documented report, and to Tim for the links to a musl thread on the same subject that confirms the diagnostic. This must be backported to 2.4.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)