project-base/server-skynet-source-3rd-jemalloc
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Modify mallctl output length when needed

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This is the only reason why `oldlenp` was designed to be in the form
of a pointer.
This commit is contained in:
Yinan Zhang 2020-07-22 14:20:38 -07:00
parent 4258402047
commit f5fb4e5a97
2 changed files with 3 additions and 1 deletions
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3
doc/jemalloc.xml.in
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@ -3608,7 +3608,8 @@ MAPPED_LIBRARIES:
<constant>NULL</constant>, and <parameter>newlen</parameter> is too <constant>NULL</constant>, and <parameter>newlen</parameter> is too
large or too small. Alternatively, <parameter>*oldlenp</parameter> large or too small. Alternatively, <parameter>*oldlenp</parameter>
is too large or too small; in this case as much data as possible is too large or too small; in this case as much data as possible
are read despite the error.</para></listitem> are read despite the error, with the amount of data read being
recorded in <parameter>*oldlenp</parameter>.</para></listitem>
</varlistentry> </varlistentry>
<varlistentry> <varlistentry>
<term><errorname>ENOENT</errorname></term> <term><errorname>ENOENT</errorname></term>

1
src/ctl.c
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@ -1494,6 +1494,7 @@ ctl_mtx_assert_held(tsdn_t *tsdn) {
size_t copylen = (sizeof(t) <= *oldlenp) \ size_t copylen = (sizeof(t) <= *oldlenp) \
? sizeof(t) : *oldlenp; \ ? sizeof(t) : *oldlenp; \
memcpy(oldp, (void *)&(v), copylen); \ memcpy(oldp, (void *)&(v), copylen); \
*oldlenp = copylen; \
ret = EINVAL; \ ret = EINVAL; \
goto label_return; \ goto label_return; \
} \ } \