mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-10-15 14:16:11 +00:00
fd34ef732d
- Utilities like pledge.com now build - kprintf() will no longer balk at 48-bit addresses - There's a new aarch64-dbg build mode that should work - gc() and defer() are mostly pacified; avoid using them on aarch64 - THIRD_PART_STB now has Arm Neon intrinsics for fast image handling
86 lines
4.1 KiB
C
86 lines
4.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 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/assert.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/iovec.h"
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#include "libc/calls/struct/iovec.internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/sock/internal.h"
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#include "libc/sysv/consts/nr.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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char testlib_enable_tmp_setup_teardown;
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TEST(read, eof) {
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char b[8] = "hello";
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ASSERT_SYS(0, 3, creat("foo", 0644));
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ASSERT_SYS(0, 4, open("foo", O_RDONLY));
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ASSERT_SYS(0, 0, read(4, b, 8));
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ASSERT_SYS(0, 8, write(3, b, 8));
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ASSERT_SYS(0, 8, read(4, b, 8));
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ASSERT_SYS(0, 0, read(4, b, 8));
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ASSERT_SYS(0, 0, close(4));
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ASSERT_SYS(0, 0, close(3));
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}
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////////////////////////////////////////////////////////////////////////////////
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static long Read(long fd, void *buf, unsigned long size) {
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#ifdef __x86_64__
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long ax, di, si, dx;
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asm volatile("syscall"
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: "=a"(ax), "=D"(di), "=S"(si), "=d"(dx)
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: "0"(__NR_read), "1"(fd), "2"(buf), "3"(size)
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: "rcx", "r8", "r9", "r10", "r11", "memory", "cc");
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return ax;
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#elif defined(__aarch64__)
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register long r0 asm("x0") = (long)fd;
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register long r1 asm("x1") = (long)buf;
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register long r2 asm("x2") = (long)size;
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register long r8 asm("x8") = (long)__NR_read;
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register long res_x0 asm("x0");
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asm volatile("svc\t0"
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: "=r"(res_x0)
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: "r"(r0), "r"(r1), "r"(r2), "r"(r8)
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: "memory");
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return res_x0;
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#endif
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}
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BENCH(read, bench) {
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char buf[16];
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ASSERT_SYS(0, 3, open("/dev/zero", O_RDONLY));
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EZBENCH2("read", donothing, read(3, buf, 5));
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EZBENCH2("pread", donothing, pread(3, buf, 5, 0));
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EZBENCH2("readv₁", donothing, readv(3, &(struct iovec){buf, 5}, 1));
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EZBENCH2("readv₂", donothing,
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readv(3, (struct iovec[]){{buf, 1}, {buf + 1, 4}}, 2));
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EZBENCH2("preadv₁", donothing, preadv(3, &(struct iovec){buf, 5}, 1, 0));
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EZBENCH2("preadv₂", donothing,
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preadv(3, (struct iovec[]){{buf, 1}, {buf + 1, 4}}, 2, 0));
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EZBENCH2("sys_read", donothing, sys_read(3, buf, 5));
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EZBENCH2("sys_readv", donothing, sys_readv(3, &(struct iovec){buf, 5}, 1));
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EZBENCH2("Read", donothing, Read(3, buf, 5));
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EZBENCH2("Read", donothing, Read(3, buf, 5));
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ASSERT_SYS(0, 0, close(3));
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}
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