mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-16 18:42:39 +00:00
1d8937d528
This change reduces the memory requirements of your APE Loader by 10x, in terms of virtual memory size, thanks to the help of alloca(). We're also now creating argument blocks with the same layout across systems.
60 lines
3 KiB
C
60 lines
3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/struct/rlimit.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/asan.internal.h"
|
|
#include "libc/intrin/describeflags.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/runtime/stack.h"
|
|
#include "libc/sysv/consts/rlimit.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
/**
|
|
* Gets resource limit for current process.
|
|
*
|
|
* @param resource can be RLIMIT_{CPU,FSIZE,DATA,STACK,CORE,RSS,etc.}
|
|
* @param rlim receives result, modified only on success
|
|
* @return 0 on success or -1 w/ errno
|
|
* @see libc/sysv/consts.sh
|
|
*/
|
|
int getrlimit(int resource, struct rlimit *rlim) {
|
|
int rc;
|
|
if (resource == 127) {
|
|
rc = einval();
|
|
} else if (!rlim || (IsAsan() && !__asan_is_valid(rlim, sizeof(*rlim)))) {
|
|
rc = efault();
|
|
} else if (!IsWindows()) {
|
|
rc = sys_getrlimit(resource, rlim);
|
|
} else if (resource == RLIMIT_STACK) {
|
|
rlim->rlim_cur = GetStaticStackSize();
|
|
rlim->rlim_max = GetStaticStackSize();
|
|
rc = 0;
|
|
} else if (resource == RLIMIT_AS) {
|
|
rlim->rlim_cur = __virtualmax;
|
|
rlim->rlim_max = __virtualmax;
|
|
rc = 0;
|
|
} else {
|
|
rc = einval();
|
|
}
|
|
STRACE("getrlimit(%s, [%s]) → %d% m", DescribeRlimitName(resource),
|
|
DescribeRlimit(rc, rlim), rc);
|
|
return rc;
|
|
}
|