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Add --with-malloc-conf.

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Add --with-malloc-conf, which makes it possible to embed a default
options string during configuration.
This commit is contained in:
Jason Evans
2016-02-07 14:23:22 -08:00
committed by Jason Evans
parent ef349f3f94
commit f829009929
9 changed files with 87 additions and 44 deletions
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28
doc/jemalloc.xml.in
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@@ -455,19 +455,20 @@ for (i = 0; i < nbins; i++) {
routines, the allocator initializes its internals based in part on various
options that can be specified at compile- or run-time.</para>
<para>The string pointed to by the global variable
<varname>malloc_conf</varname>, the &ldquo;name&rdquo; of the file
referenced by the symbolic link named <filename
class="symlink">/etc/malloc.conf</filename>, and the value of the
<para>The string specified via <option>--with-malloc-conf</option>, the
string pointed to by the global variable <varname>malloc_conf</varname>, the
&ldquo;name&rdquo; of the file referenced by the symbolic link named
<filename class="symlink">/etc/malloc.conf</filename>, and the value of the
environment variable <envar>MALLOC_CONF</envar>, will be interpreted, in
that order, from left to right as options. Note that
<varname>malloc_conf</varname> may be read before
<function>main<parameter/></function> is entered, so the declaration of
<varname>malloc_conf</varname> should specify an initializer that contains
the final value to be read by jemalloc. <varname>malloc_conf</varname> is
a compile-time setting, whereas <filename
class="symlink">/etc/malloc.conf</filename> and <envar>MALLOC_CONF</envar>
can be safely set any time prior to program invocation.</para>
the final value to be read by jemalloc. <option>--with-malloc-conf</option>
and <varname>malloc_conf</varname> are compile-time mechanisms, whereas
<filename class="symlink">/etc/malloc.conf</filename> and
<envar>MALLOC_CONF</envar> can be safely set any time prior to program
invocation.</para>
<para>An options string is a comma-separated list of option:value pairs.
There is one key corresponding to each <link
@@ -776,6 +777,17 @@ for (i = 0; i < nbins; i++) {
during build configuration.</para></listitem>
</varlistentry>
<varlistentry id="config.malloc_conf">
<term>
<mallctl>config.malloc_conf</mallctl>
(<type>const char *</type>)
<literal>r-</literal>
</term>
<listitem><para>Embedded configure-time-specified run-time options
string, empty unless <option>--with-malloc-conf</option> was specified
during build configuration.</para></listitem>
</varlistentry>
<varlistentry id="config.munmap">
<term>
<mallctl>config.munmap</mallctl>