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Add msync_test

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Justine Tunney 2023-02-05 16:49:52 -08:00
parent 4b8874ceb9
commit 49c1dea03b
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1 changed files with 47 additions and 0 deletions
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test/libc/runtime/msync_test.c Normal file
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/*-*- 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 2023 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/runtime/runtime.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/msync.h"
#include "libc/sysv/consts/prot.h"
#include "libc/testlib/testlib.h"
TEST(msync, changeFileMappingAndExit) {
int ws;
char byte;
char *map;
ASSERT_SYS(0, 3, tmpfd());
ASSERT_SYS(0, 0, ftruncate(3, 4));
ASSERT_NE(MAP_FAILED,
(map = mmap(0, 4, PROT_READ | PROT_WRITE, MAP_SHARED, 3, 0)));
if (!fork()) {
map[0] = 1;
ASSERT_SYS(0, 0, msync(map, 4, MS_SYNC));
_Exit(123);
}
ASSERT_NE(-1, wait(&ws));
ASSERT_TRUE(WIFEXITED(ws));
ASSERT_EQ(123, WEXITSTATUS(ws));
ASSERT_SYS(0, 1, pread(3, &byte, 1, 0));
ASSERT_EQ(1, byte);
ASSERT_EQ(1, map[0]);
ASSERT_SYS(0, 0, munmap(map, 4));
ASSERT_SYS(0, 0, close(3));
}