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Make the default option of zero realloc match the system allocator.

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This commit is contained in:
Qi Wang
2022-05-03 15:41:43 -07:00
committed by Qi Wang
parent 66c889500a
commit 8cb814629a
4 changed files with 26 additions and 8 deletions
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9
configure.ac
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@@ -638,6 +638,7 @@ dnl Define cpp macros in CPPFLAGS, rather than doing AC_DEFINE(macro), since the
dnl definitions need to be seen before any headers are included, which is a pain
dnl to make happen otherwise.
default_retain="0"
zero_realloc_default_free="0"
maps_coalesce="1"
DUMP_SYMS="${NM} -a"
SYM_PREFIX=""
@@ -684,6 +685,7 @@ case "${host}" in
if test "${LG_SIZEOF_PTR}" = "3"; then
default_retain="1"
fi
zero_realloc_default_free="1"
;;
*-*-linux*)
dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
@@ -698,6 +700,7 @@ case "${host}" in
if test "${LG_SIZEOF_PTR}" = "3"; then
default_retain="1"
fi
zero_realloc_default_free="1"
;;
*-*-kfreebsd*)
dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
@@ -773,6 +776,7 @@ case "${host}" in
if test "${LG_SIZEOF_PTR}" = "3"; then
default_retain="1"
fi
zero_realloc_default_free="1"
;;
*-*-nto-qnx)
abi="elf"
@@ -1395,6 +1399,11 @@ if test "x$default_retain" = "x1" ; then
AC_DEFINE([JEMALLOC_RETAIN], [ ], [ ])
fi
dnl Indicate whether realloc(ptr, 0) defaults to the "alloc" behavior.
if test "x$zero_realloc_default_free" = "x1" ; then
AC_DEFINE([JEMALLOC_ZERO_REALLOC_DEFAULT_FREE], [ ], [ ])
fi
dnl Enable allocation from DSS if supported by the OS.
have_dss="1"
dnl Check whether the BSD/SUSv1 sbrk() exists. If not, disable DSS support.