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43ed01f08f
Using `SwiftShims` is undesirable - it creates all kinds of build issues, and means shipping the `_SwiftBacktracing.h` header in the SDK, which is not necessary. While we're doing this, add the necessary definitions for reading ELF and DWARF information. rdar://110261712
129 lines
3.1 KiB
C++
129 lines
3.1 KiB
C++
//===--- Libc.h - Imports from the C library --------------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2023 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Imported functions from the C library. We can't use Darwin, Glibc or
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// MSVCRT from here because that would create dependency issues.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BACKTRACING_LIBC_H
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#define SWIFT_BACKTRACING_LIBC_H
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#include <sys/types.h>
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#include <sys/stat.h>
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#if __has_include(<dlfcn.h>)
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#include <dlfcn.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef __APPLE__
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#include <TargetConditionals.h>
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#endif
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#ifdef _WIN32
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#include "swift/Runtime/Win32.h"
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#include <io.h>
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#include <stdarg.h>
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// Work around the fact that MSVCRT renamed all the POSIX functions and
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// doesn't actually implement all of them anyway.
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef __int64 off_t;
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typedef int ssize_t;
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#define O_APPEND _O_APPEND
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#define O_BINARY _O_BINARY
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#define O_CREAT _O_CREAT
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#define O_EXCL _O_EXCL
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#define O_RDONLY _O_RDONLY
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#define O_RDWR _O_RDWR
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#define O_TEXT _O_TEXT
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#define O_TRUNC _O_TRUNC
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#define O_WRONLY _O_WRONLY
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static inline int open(const char *filename, int oflag, ...) {
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wchar_t *wide = _swift_win32_copyWideFromUTF8(path);
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int pmode = 0;
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if (oflag & O_CREAT) {
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va_list val;
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va_start(val, oflag);
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pmode = va_arg(val, int);
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va_end(val);
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}
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int fd = _wopen(wpath, oflag, pmode);
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free(wide);
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return fd;
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}
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static inline int close(int fd) {
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return _close(fd);
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}
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static inline off_t lseek(int fd, off_t offset, int whence) {
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return _lseeki64(fd, offset, whence);
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}
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static inline ssize_t read(int fd, void *buf, size_t nbyte) {
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return _read(fd, buf, nbyte);
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}
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static inline ssize_t write(int fd, void *buf, size_t nbyte) {
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return _write(fd, buf, nbyte);
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}
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ssize_t pread(int fd, void *buf, size_t nbyte, off_t offset);
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ssize_t pwrite(int fd, const void *buf, size_t nbyte, off_t offset);
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#ifdef __cplusplus
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}
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#endif
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#else
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#include <unistd.h>
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#endif
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// .. Swift affordances ........................................................
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* open() is usually declared as a variadic function; these don't import into
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Swift. */
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static inline int _swift_open(const char *filename, int oflag, int mode) {
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return open(filename, oflag, mode);
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}
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/* errno is typically not going to be easily accessible (it's often a macro),
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so add a get_errno() function to do that. */
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static inline int _swift_get_errno() { return errno; }
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static void _swift_set_errno(int err) { errno = err; }
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#ifdef __cplusplus
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}
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#endif
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#endif // SWIFT_BACKTRACING_LIBC_H
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