mirror of
https://github.com/haproxy/haproxy.git
synced 2026-06-11 09:52:56 -04:00
1c59c39171
HAProxy used to call hlua_init() unconditionally from step_init_1(), before any configuration file was parsed. As a consequence, Lua states 0 and 1 were always created with hlua_openlibs_flags set to its default value (HLUA_OPENLIBS_ALL), regardless of any tune.lua.openlibs directive that appeared later in the global section. With multiple threads, states 2..N were created correctly in hlua_post_init() after the config had been parsed, while states 0 and 1 retained the full standard-library set. This produced the observable bug reported in GitHub issue #3396: a script loaded with lua-load-per-thread could see require() as a function on thread 1 but nil on thread 2 when tune.lua.openlibs was used to restrict the available libraries. The initialisation is now lazy. hlua_init() is idempotent: it returns immediately if the states already exist (hlua_states[0] != NULL). It is called explicitly from the three config keyword handlers that need the Lua states to be live before they can do their work (lua-load, lua-load-per-thread, lua-prepend-path) and from tune.lua.openlibs, after the hlua_openlibs_flags variable has been updated, so that the states are always created with the correct library set. hlua_post_init() calls hlua_init() unconditionally as a safety net, covering the case where no Lua directive appeared in the configuration at all (no global section, or only pure-tuning directives such as timeouts and memory limits), and ensuring correct behaviour with multiple consecutive global sections. As a result of this change, tune.lua.openlibs must now appear before lua-load, lua-load-per-thread, and lua-prepend-path in the configuration; if any of those keywords is encountered first, the Lua states will already be initialised and tune.lua.openlibs with a non-default value will return a parse error. No backport needed. |
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| .. | ||
| design-thoughts | ||
| internals | ||
| lua-api | ||
| 51Degrees-device-detection.txt | ||
| acl.fig | ||
| coding-style.txt | ||
| configuration.txt | ||
| cookie-options.txt | ||
| DeviceAtlas-device-detection.txt | ||
| gpl.txt | ||
| haproxy.1 | ||
| HAProxyCommunityEdition_60px.png | ||
| haterm.txt | ||
| intro.txt | ||
| lgpl.txt | ||
| linux-syn-cookies.txt | ||
| lua.txt | ||
| management.txt | ||
| netscaler-client-ip-insertion-protocol.txt | ||
| network-namespaces.txt | ||
| peers-v2.0.txt | ||
| peers.txt | ||
| proxy-protocol.txt | ||
| queuing.fig | ||
| regression-testing.txt | ||
| seamless_reload.txt | ||
| SOCKS4.protocol.txt | ||
| SPOE.txt | ||
| WURFL-device-detection.txt | ||
