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William suggested that since we can detect the presence of Lua in the stack, let's combine it with stuck detection to set a new pair of flags indicating a stuck Lua context and a stuck Lua shared context. Now, executing an infinite loop in a Lua sample fetch function with yield disabled crashes with tainted=0xe40 if loaded from a lua-load statement, or tainted=0x640 from a lua-load-per-thread statement. In addition, at the end of the panic dump, we can check if Lua was seen stuck and emit recommendations about lua-load-per-thread and the choice of dependencies depending on the presence of threads and/or shared context.
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)