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https://github.com/jart/cosmopolitan.git
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d1d4388201
It hasn't been helpful enough to be justify the maintenance burden. What actually does help is mprotect(), kprintf(), --ftrace and --strace which can always be counted upon to work correctly. We aren't losing much with this change. Support for ASAN on AARCH64 was never implemented. Applying ASAN to the core libc runtimes was disabled many months ago. If there is some way to have an ASAN runtime for user programs that is less invasive we can potentially consider reintroducing support. But now is premature.
110 lines
3.9 KiB
C
110 lines
3.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/struct/sysinfo.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sysinfo.internal.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/dce.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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#define CTL_KERN 1
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#define CTL_VM 2
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#define CTL_HW 6
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#define VM_LOADAVG 2
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#define KERN_BOOTTIME 21
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#define HW_PHYSMEM (IsXnu() ? 24 : 5)
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struct loadavg {
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uint32_t ldavg[3];
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int64_t fscale;
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};
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static int64_t GetUptime(void) {
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if (IsNetbsd())
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return 0; // TODO(jart): Why?
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struct timeval x;
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size_t n = sizeof(x);
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int mib[] = {CTL_KERN, KERN_BOOTTIME};
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if (sysctl(mib, ARRAYLEN(mib), &x, &n, 0, 0) == -1)
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return 0;
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return timespec_real().tv_sec - x.tv_sec;
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}
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static int64_t GetPhysmem(void) {
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uint64_t x = 0;
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size_t n = sizeof(x);
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int mib[] = {CTL_HW, HW_PHYSMEM};
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if (sysctl(mib, ARRAYLEN(mib), &x, &n, 0, 0) == -1)
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return 0;
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return x;
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}
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static void GetLoads(uint64_t loads[3]) {
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size_t size;
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struct loadavg loadinfo;
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int mib[2] = {CTL_VM, VM_LOADAVG};
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size = sizeof(loadinfo);
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if (sysctl(mib, 2, &loadinfo, &size, 0, 0) != -1) {
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for (int i = 0; i < 3; i++) {
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loads[i] = (double)loadinfo.ldavg[i] / loadinfo.fscale * 65536;
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}
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}
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}
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static int sys_sysinfo_bsd(struct sysinfo *info) {
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GetLoads(info->loads);
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info->uptime = GetUptime();
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info->totalram = GetPhysmem();
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info->bufferram = GetPhysmem();
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info->mem_unit = 1;
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return 0;
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}
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/**
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* Returns amount of system ram, cores, etc.
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*
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* Only the `totalram` field is supported on all platforms right now.
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* Support is best on Linux. Fields will be set to zero when they're not
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* known.
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*
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* @return 0 on success or -1 w/ errno
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* @error EFAULT
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*/
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int sysinfo(struct sysinfo *info) {
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int rc;
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struct sysinfo x = {0};
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if (!IsWindows()) {
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if (IsLinux()) {
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rc = sys_sysinfo(&x);
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} else {
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rc = sys_sysinfo_bsd(&x);
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}
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} else {
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rc = sys_sysinfo_nt(&x);
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}
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if (rc != -1) {
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memcpy(info, &x, sizeof(x));
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}
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STRACE("sysinfo(%p) → %d% m", info, rc);
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return rc;
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}
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