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Extract profiling code from [re]allocation functions.

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Extract profiling code from malloc(), imemalign(), calloc(), realloc(),
mallocx(), rallocx(), and xallocx().  This slightly reduces the amount
of code compiled into the fast paths, but the primary benefit is the
combinatorial complexity reduction.

Simplify iralloc[t]() by creating a separate ixalloc() that handles the
no-move cases.

Further simplify [mrxn]allocx() (and by implication [mrn]allocm()) to
make request size overflows due to size class and/or alignment
constraints trigger undefined behavior (detected by debug-only
assertions).

Report ENOMEM rather than EINVAL if an OOM occurs during heap profiling
backtrace creation in imemalign().  This bug impacted posix_memalign()
and aligned_alloc().
This commit is contained in:
Jason Evans
2014-01-12 15:05:44 -08:00
parent 6b694c4d47
commit b2c31660be
10 changed files with 553 additions and 497 deletions
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26
doc/jemalloc.xml.in
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@@ -321,14 +321,16 @@
<para>The <function>mallocx<parameter/></function> function allocates at
least <parameter>size</parameter> bytes of memory, and returns a pointer
to the base address of the allocation. Behavior is undefined if
<parameter>size</parameter> is <constant>0</constant>.</para>
<parameter>size</parameter> is <constant>0</constant>, or if request size
overflows due to size class and/or alignment constraints.</para>
<para>The <function>rallocx<parameter/></function> function resizes the
allocation at <parameter>ptr</parameter> to be at least
<parameter>size</parameter> bytes, and returns a pointer to the base
address of the resulting allocation, which may or may not have moved from
its original location. Behavior is undefined if
<parameter>size</parameter> is <constant>0</constant>.</para>
<parameter>size</parameter> is <constant>0</constant>, or if request size
overflows due to size class and/or alignment constraints.</para>
<para>The <function>xallocx<parameter/></function> function resizes the
allocation at <parameter>ptr</parameter> in place to be at least
@@ -355,8 +357,9 @@
<function>mallocx<parameter/></function> function, and returns the real
size of the allocation that would result from the equivalent
<function>mallocx<parameter/></function> function call. Behavior is
undefined if <parameter>size</parameter> is
<constant>0</constant>.</para>
undefined if <parameter>size</parameter> is <constant>0</constant>, or if
request size overflows due to size class and/or alignment
constraints.</para>
<para>The <function>mallctl<parameter/></function> function provides a
general interface for introspecting the memory allocator, as well as
@@ -518,8 +521,9 @@ for (i = 0; i < nbins; i++) {
<parameter>*ptr</parameter> to the base address of the allocation, and
sets <parameter>*rsize</parameter> to the real size of the allocation if
<parameter>rsize</parameter> is not <constant>NULL</constant>. Behavior
is undefined if <parameter>size</parameter> is
<constant>0</constant>.</para>
is undefined if <parameter>size</parameter> is <constant>0</constant>, or
if request size overflows due to size class and/or alignment
constraints.</para>
<para>The <function>rallocm<parameter/></function> function resizes the
allocation at <parameter>*ptr</parameter> to be at least
@@ -532,8 +536,9 @@ for (i = 0; i < nbins; i++) {
language="C">(<parameter>size</parameter> +
<parameter>extra</parameter>)</code> bytes, though inability to allocate
the extra byte(s) will not by itself result in failure. Behavior is
undefined if <parameter>size</parameter> is <constant>0</constant>, or if
<code language="C">(<parameter>size</parameter> +
undefined if <parameter>size</parameter> is <constant>0</constant>, if
request size overflows due to size class and/or alignment constraints, or
if <code language="C">(<parameter>size</parameter> +
<parameter>extra</parameter> &gt;
<constant>SIZE_T_MAX</constant>)</code>.</para>
@@ -550,8 +555,9 @@ for (i = 0; i < nbins; i++) {
<parameter>rsize</parameter> is not <constant>NULL</constant> it sets
<parameter>*rsize</parameter> to the real size of the allocation that
would result from the equivalent <function>allocm<parameter/></function>
function call. Behavior is undefined if
<parameter>size</parameter> is <constant>0</constant>.</para>
function call. Behavior is undefined if <parameter>size</parameter> is
<constant>0</constant>, or if request size overflows due to size class
and/or alignment constraints.</para>
</refsect2>
</refsect1>
<refsect1 id="tuning">