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Merge #10120: util: Work around (virtual) memory exhaustion on 32-bit w/ glibc

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625488a util: Work around (virtual) memory exhaustion on 32-bit w/ glibc (Wladimir J. van der Laan)

Tree-SHA512: 99b610a8cf9561998af90e16fc19320fddd30c987e8f33325d63df0f56d70235b94d9482e80f28154d4b33a3ecf4961686380c444ec18d1da5e8804a8b6f4de1
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Wladimir J. van der Laan 2017-03-31 10:36:18 +02:00 committed by Alexander Block
parent a149129656
commit 42d3060568
2 changed files with 22 additions and 0 deletions
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8
configure.ac
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@ -558,6 +558,14 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]],
[ AC_MSG_RESULT(no)] [ AC_MSG_RESULT(no)]
) )
dnl Check for mallopt(M_ARENA_MAX) (to set glibc arenas)
AC_MSG_CHECKING(for mallopt M_ARENA_MAX)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <malloc.h>]],
[[ mallopt(M_ARENA_MAX, 1); ]])],
[ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_MALLOPT_ARENA_MAX, 1,[Define this symbol if you have mallopt with M_ARENA_MAX]) ],
[ AC_MSG_RESULT(no)]
)
AC_MSG_CHECKING([for visibility attribute]) AC_MSG_CHECKING([for visibility attribute])
AC_LINK_IFELSE([AC_LANG_SOURCE([ AC_LINK_IFELSE([AC_LANG_SOURCE([
int foo_def( void ) __attribute__((visibility("default"))); int foo_def( void ) __attribute__((visibility("default")));

14
src/util.cpp
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@ -75,6 +75,10 @@
#include <sys/prctl.h> #include <sys/prctl.h>
#endif #endif
#ifdef HAVE_MALLOPT_ARENA_MAX
#include <malloc.h>
#endif
#include <boost/algorithm/string/case_conv.hpp> // for to_lower() #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
#include <boost/algorithm/string/join.hpp> #include <boost/algorithm/string/join.hpp>
#include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith() #include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
@ -903,6 +907,16 @@ std::string GetThreadName()
void SetupEnvironment() void SetupEnvironment()
{ {
#ifdef HAVE_MALLOPT_ARENA_MAX
// glibc-specific: On 32-bit systems set the number of arenas to 1.
// By default, since glibc 2.10, the C library will create up to two heap
// arenas per core. This is known to cause excessive virtual address space
// usage in our usage. Work around it by setting the maximum number of
// arenas to 1.
if (sizeof(void*) == 4) {
mallopt(M_ARENA_MAX, 1);
}
#endif
// On most POSIX systems (e.g. Linux, but not BSD) the environment's locale // On most POSIX systems (e.g. Linux, but not BSD) the environment's locale
// may be invalid, in which case the "C" locale is used as fallback. // may be invalid, in which case the "C" locale is used as fallback.
#if !defined(WIN32) && !defined(MAC_OSX) && !defined(__FreeBSD__) && !defined(__OpenBSD__) #if !defined(WIN32) && !defined(MAC_OSX) && !defined(__FreeBSD__) && !defined(__OpenBSD__)