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Diffstat (limited to 'doc/manual')
| -rw-r--r-- | doc/manual/command-ref/conf-file.xml | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/doc/manual/command-ref/conf-file.xml b/doc/manual/command-ref/conf-file.xml index 1325a3f22253..320e15339d9e 100644 --- a/doc/manual/command-ref/conf-file.xml +++ b/doc/manual/command-ref/conf-file.xml @@ -981,6 +981,34 @@ requiredSystemFeatures = [ "kvm" ]; </varlistentry> + <varlistentry xml:id="conf-trace-function-calls"><term><literal>trace-function-calls</literal></term> + + <listitem> + + <para>Default: <literal>false</literal>.</para> + + <para>If set to <literal>true</literal>, the Nix evaluator will + trace every function call. Nix will print a log message at the + "vomit" level for every function entrance and function exit.</para> + + <informalexample><screen> +function-trace entered undefined position at 1565795816999559622 +function-trace exited undefined position at 1565795816999581277 +function-trace entered /nix/store/.../example.nix:226:41 at 1565795253249935150 +function-trace exited /nix/store/.../example.nix:226:41 at 1565795253249941684 +</screen></informalexample> + + <para>The <literal>undefined position</literal> means the function + call is a builtin.</para> + + <para>Use the <literal>contrib/stack-collapse.py</literal> script + distributed with the Nix source code to convert the trace logs + in to a format suitable for <command>flamegraph.pl</command>.</para> + + </listitem> + + </varlistentry> + <varlistentry xml:id="conf-trusted-public-keys"><term><literal>trusted-public-keys</literal></term> <listitem><para>A whitespace-separated list of public keys. When |