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0cb6b6ff4b
Now that we have understandable system call tracing on Windows, this change rewrites many of the polyfill internals for that platform, to help things get closer to tip top shape. Support for complex forking scenarios had been in a regressed state for quite some time. Now, it works! Subsequent changes should be able to address the performance.
52 lines
3.3 KiB
C
52 lines
3.3 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 2022 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/internal.h"
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#include "libc/calls/strace.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/nt/enum/filemapflags.h"
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#include "libc/nt/memory.h"
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extern typeof(MapViewOfFileExNuma) *const __imp_MapViewOfFileExNuma __msabi;
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/**
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* Maps view of file mapping into memory on the New Technology.
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*
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* @param hFileMappingObject was returned by CreateFileMapping()
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* @param dwDesiredAccess has kNtFileMap... flags
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* @param opt_lpDesiredBaseAddress may be NULL to let o/s choose
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* @return base address, or NULL on failure
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* @note this wrapper takes care of ABI, STRACE(), and __winerr()
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*/
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void *MapViewOfFileExNuma(int64_t hFileMappingObject, uint32_t dwDesiredAccess,
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uint32_t dwFileOffsetHigh, uint32_t dwFileOffsetLow,
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size_t dwNumberOfBytesToMap,
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void *opt_lpDesiredBaseAddress,
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uint32_t nndDesiredNumaNode) {
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void *pStartingAddress;
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pStartingAddress = __imp_MapViewOfFileExNuma(
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hFileMappingObject, dwDesiredAccess, dwFileOffsetHigh, dwFileOffsetLow,
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dwNumberOfBytesToMap, opt_lpDesiredBaseAddress, nndDesiredNumaNode);
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if (!pStartingAddress) __winerr();
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STRACE("MapViewOfFileExNuma(%ld, %s, off:%'ld, size:%'zu, %p) → %p% m",
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hFileMappingObject, DescribeNtFileMapFlags(dwDesiredAccess),
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(uint64_t)dwFileOffsetHigh << 32 | dwFileOffsetLow,
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dwNumberOfBytesToMap, opt_lpDesiredBaseAddress, pStartingAddress);
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return pStartingAddress;
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}
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