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https://github.com/RGBCube/serenity
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1cd3826ad6
MAP_FILE is not in POSIX, and is simply in most LibCs as a "default" mode. Our own LibC defines it as 0, meaning "no flags". It is also not defined in some OS's, such as Haiku. Let's be more portable and not use the unnecessary flag.
39 lines
1,012 B
C++
39 lines
1,012 B
C++
/*
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* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <sys/mman.h>
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static u8* shared_ptr = nullptr;
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static void shared_zero_length_inode_vmobject_sync_signal_handler(int)
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{
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auto rc = msync(shared_ptr, 0x1000, MS_ASYNC);
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EXPECT(rc == 0);
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rc = munmap(shared_ptr, 0x1000);
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EXPECT(rc == 0);
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exit(0);
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}
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TEST_CASE(shared_zero_length_inode_vmobject_sync)
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{
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{
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struct sigaction new_action {
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{ shared_zero_length_inode_vmobject_sync_signal_handler }, 0, 0
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};
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int rc = sigaction(SIGBUS, &new_action, nullptr);
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VERIFY(rc == 0);
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}
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int fd = open("/tmp/shared_msync_test", O_RDWR | O_CREAT, 0644);
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VERIFY(fd >= 0);
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shared_ptr = (u8*)mmap(nullptr, 0x1000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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EXPECT(shared_ptr != MAP_FAILED);
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shared_ptr[0] = 0x1;
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VERIFY_NOT_REACHED();
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}
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