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Given the following example configuration:
listen foo
mode http
bind *:8080
http-request set-var(txn.leak) bool(1)
server x example.com:80
Running a configuration check with valgrind reports:
==24233== 2 bytes in 1 blocks are definitely lost in loss record 1 of 345
==24233== at 0x4C2DB8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==24233== by 0x4E238D: my_strndup (tools.c:2261)
==24233== by 0x581E10: make_arg_list (arg.c:253)
==24233== by 0x4DE90D: sample_parse_expr (sample.c:890)
==24233== by 0x58E2F4: parse_store (vars.c:772)
==24233== by 0x566A2F: parse_http_req_cond (http_rules.c:95)
==24233== by 0x4A4CE6: cfg_parse_listen (cfgparse-listen.c:1339)
==24233== by 0x494C59: readcfgfile (cfgparse.c:2049)
==24233== by 0x545135: init (haproxy.c:2029)
==24233== by 0x421E42: main (haproxy.c:3175)
After this patch is applied the leak is gone as expected.
This is a fairly minor leak, but it can add up for many uses of the `bool()`
sample fetch. The bug most likely exists since the `bool()` sample fetch was
introduced in commit cc103299c75c530ab3637a1698306145bdc85552. The fix may
be backported to HAProxy 1.6+.
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)