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# Copyright (C) 2002-2004, 2006-2018 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# Test whether the *printf family of functions recovers gracefully in case
# of an out-of-memory condition, or whether it crashes the entire program.
# Result is gl_cv_func_printf_enomem.
printf_enomem_test = '''
#include <stdio.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <errno.h>
int main()
{
struct rlimit limit;
int ret;
nocrash_init ();
/* Some printf implementations allocate temporary space with malloc. */
/* On BSD systems, malloc() is limited by RLIMIT_DATA. */
#ifdef RLIMIT_DATA
if (getrlimit (RLIMIT_DATA, &limit) < 0)
return 77;
if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
limit.rlim_max = 5000000;
limit.rlim_cur = limit.rlim_max;
if (setrlimit (RLIMIT_DATA, &limit) < 0)
return 77;
#endif
/* On Linux systems, malloc() is limited by RLIMIT_AS. */
#ifdef RLIMIT_AS
if (getrlimit (RLIMIT_AS, &limit) < 0)
return 77;
if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
limit.rlim_max = 5000000;
limit.rlim_cur = limit.rlim_max;
if (setrlimit (RLIMIT_AS, &limit) < 0)
return 77;
#endif
/* Some printf implementations allocate temporary space on the stack. */
#ifdef RLIMIT_STACK
if (getrlimit (RLIMIT_STACK, &limit) < 0)
return 77;
if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
limit.rlim_max = 5000000;
limit.rlim_cur = limit.rlim_max;
if (setrlimit (RLIMIT_STACK, &limit) < 0)
return 77;
#endif
ret = printf ("%.5000000f", 1.0);
return !(ret == 5000002 || (ret < 0 && errno == ENOMEM));
}
'''
if meson.can_run_host_binaries()
run_result = cc.run(printf_enomem_test,
name : 'printf survives out-of-memory conditions')
gl_cv_func_printf_enomem = run_result.compiled() and run_result.returncode() == 0
else
# If we don't know, assume the worst.
gl_cv_func_printf_enomem = false
if (host_system == 'linux' or
host_system == 'solaris' or
host_system == 'sunos' or
host_system == 'aix' or
host_system == 'irix' or
host_system == 'beos' or
host_system == 'haiku')
gl_cv_func_printf_enomem = true
endif
endif
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