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| 1 | //===-- Including stdio.h in overlay mode ---------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef LLVM_LIBC_HDR_STDIO_OVERLAY_H |
| 10 | #define LLVM_LIBC_HDR_STDIO_OVERLAY_H |
| 11 | |
| 12 | #ifdef LIBC_FULL_BUILD |
| 13 | #error "This header should only be included in overlay mode" |
| 14 | #endif |
| 15 | |
| 16 | // Overlay mode |
| 17 | |
| 18 | // glibc <stdio.h> header might provide extern inline definitions for few |
| 19 | // functions, causing external alias errors. They are guarded by |
| 20 | // `__USE_EXTERN_INLINES` macro. We temporarily disable `__USE_EXTERN_INLINES` |
| 21 | // macro by defining `__NO_INLINE__` before including <stdio.h>. |
| 22 | // And the same with `__USE_FORTIFY_LEVEL`, which will be temporarily disabled |
| 23 | // with `_FORTIFY_SOURCE`. |
| 24 | |
| 25 | #ifdef _FORTIFY_SOURCE |
| 26 | #define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE |
| 27 | #undef _FORTIFY_SOURCE |
| 28 | #endif |
| 29 | |
| 30 | #ifdef __USE_EXTERN_INLINES |
| 31 | #define LIBC_OLD_USE_EXTERN_INLINES |
| 32 | #undef __USE_EXTERN_INLINES |
| 33 | #endif |
| 34 | |
| 35 | #ifdef __USE_FORTIFY_LEVEL |
| 36 | #define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL |
| 37 | #undef __USE_FORTIFY_LEVEL |
| 38 | #define __USE_FORTIFY_LEVEL 0 |
| 39 | #endif |
| 40 | |
| 41 | #ifndef __NO_INLINE__ |
| 42 | #define __NO_INLINE__ 1 |
| 43 | #define LIBC_SET_NO_INLINE |
| 44 | #endif |
| 45 | |
| 46 | #include <stdio.h> |
| 47 | |
| 48 | #ifdef LIBC_OLD_FORTIFY_SOURCE |
| 49 | #define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE |
| 50 | #undef LIBC_OLD_FORTIFY_SOURCE |
| 51 | #endif |
| 52 | |
| 53 | #ifdef LIBC_SET_NO_INLINE |
| 54 | #undef __NO_INLINE__ |
| 55 | #undef LIBC_SET_NO_INLINE |
| 56 | #endif |
| 57 | |
| 58 | #ifdef LIBC_OLD_USE_FORTIFY_LEVEL |
| 59 | #undef __USE_FORTIFY_LEVEL |
| 60 | #define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL |
| 61 | #undef LIBC_OLD_USE_FORTIFY_LEVEL |
| 62 | #endif |
| 63 | |
| 64 | #ifdef LIBC_OLD_USE_EXTERN_INLINES |
| 65 | #define __USE_EXTERN_INLINES |
| 66 | #undef LIBC_OLD_USE_EXTERN_INLINES |
| 67 | #endif |
| 68 | |
| 69 | #endif // LLVM_LIBC_HDR_STDIO_OVERLAY_H |
| 70 |
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