275 lines
10 KiB
C
275 lines
10 KiB
C
/*
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* Copyright (C) 2017 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _STRING_H
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#error "Never include this file directly; instead, include <string.h>"
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#endif
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void* __memchr_chk(const void*, int, size_t, size_t) __INTRODUCED_IN(23);
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void* __memrchr_chk(const void*, int, size_t, size_t) __INTRODUCED_IN(23);
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char* __stpncpy_chk2(char*, const char*, size_t, size_t, size_t) __INTRODUCED_IN(21);
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char* __strncpy_chk2(char*, const char*, size_t, size_t, size_t) __INTRODUCED_IN(21);
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size_t __strlcpy_chk(char*, const char*, size_t, size_t) __INTRODUCED_IN(17);
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size_t __strlcat_chk(char*, const char*, size_t, size_t) __INTRODUCED_IN(17);
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#if defined(__BIONIC_FORTIFY)
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extern void* __memrchr_real(const void*, int, size_t) __RENAME(memrchr);
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#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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/* No diag -- clang diagnoses misuses of this on its own. */
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__BIONIC_FORTIFY_INLINE
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void* memcpy(void* const dst __pass_object_size0, const void* src, size_t copy_amount)
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__diagnose_as_builtin(__builtin_memcpy, 1, 2, 3)
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__overloadable {
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return __builtin___memcpy_chk(dst, src, copy_amount, __bos0(dst));
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}
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/* No diag -- clang diagnoses misuses of this on its own. */
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__BIONIC_FORTIFY_INLINE
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void* memmove(void* const dst __pass_object_size0, const void* src, size_t len)
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__diagnose_as_builtin(__builtin_memmove, 1, 2, 3)
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__overloadable {
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return __builtin___memmove_chk(dst, src, len, __bos0(dst));
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}
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#endif
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#if defined(__USE_GNU)
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#if __ANDROID_API__ >= 30
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__BIONIC_FORTIFY_INLINE
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void* mempcpy(void* const dst __pass_object_size0, const void* src, size_t copy_amount)
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__diagnose_as_builtin(__builtin_mempcpy, 1, 2, 3)
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__overloadable
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__clang_error_if(__bos_unevaluated_lt(__bos0(dst), copy_amount),
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"'mempcpy' called with size bigger than buffer") {
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#if __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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size_t bos_dst = __bos0(dst);
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if (!__bos_trivially_ge(bos_dst, copy_amount)) {
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return __builtin___mempcpy_chk(dst, src, copy_amount, bos_dst);
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}
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#endif
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return __builtin_mempcpy(dst, src, copy_amount);
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}
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#endif /* __ANDROID_API__ >= 30 */
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#endif /* __USE_GNU */
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__BIONIC_FORTIFY_INLINE
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char* stpcpy(char* const dst __pass_object_size, const char* src)
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__overloadable
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__clang_error_if(__bos_unevaluated_le(__bos(dst), __builtin_strlen(src)),
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"'stpcpy' called with string bigger than buffer") {
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#if __ANDROID_API__ >= 21 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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return __builtin___stpcpy_chk(dst, src, __bos(dst));
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#else
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return __builtin_stpcpy(dst, src);
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#endif
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}
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__BIONIC_FORTIFY_INLINE
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char* strcpy(char* const dst __pass_object_size, const char* src)
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__diagnose_as_builtin(__builtin_strcpy, 1, 2)
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__overloadable
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__clang_error_if(__bos_unevaluated_le(__bos(dst), __builtin_strlen(src)),
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"'strcpy' called with string bigger than buffer") {
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#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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return __builtin___strcpy_chk(dst, src, __bos(dst));
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#else
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return __builtin_strcpy(dst, src);
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#endif
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}
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__BIONIC_FORTIFY_INLINE
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char* strcat(char* const dst __pass_object_size, const char* src)
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__overloadable
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__clang_error_if(__bos_unevaluated_le(__bos(dst), __builtin_strlen(src)),
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"'strcat' called with string bigger than buffer") {
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#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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return __builtin___strcat_chk(dst, src, __bos(dst));
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#else
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return __builtin_strcat(dst, src);
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#endif
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}
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#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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/* No diag -- clang diagnoses misuses of this on its own. */
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__BIONIC_FORTIFY_INLINE
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char* strncat(char* const dst __pass_object_size, const char* src, size_t n)
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__diagnose_as_builtin(__builtin_strncat, 1, 2, 3)
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__overloadable {
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return __builtin___strncat_chk(dst, src, n, __bos(dst));
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}
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#endif
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/* No diag -- clang diagnoses misuses of this on its own. */
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__BIONIC_FORTIFY_INLINE
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void* memset(void* const s __pass_object_size0, int c, size_t n) __overloadable
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__diagnose_as_builtin(__builtin_memset, 1, 2, 3)
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/* If you're a user who wants this warning to go away: use `(&memset)(foo, bar, baz)`. */
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__clang_warning_if(c && !n, "'memset' will set 0 bytes; maybe the arguments got flipped?") {
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#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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return __builtin___memset_chk(s, c, n, __bos0(s));
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#else
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return __builtin_memset(s, c, n);
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#endif
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}
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#if __ANDROID_API__ >= 23 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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__BIONIC_FORTIFY_INLINE
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void* memchr(const void* const s __pass_object_size, int c, size_t n) __overloadable {
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size_t bos = __bos(s);
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if (__bos_trivially_ge(bos, n)) {
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return __builtin_memchr(s, c, n);
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}
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return __memchr_chk(s, c, n, bos);
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}
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__BIONIC_FORTIFY_INLINE
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void* __memrchr_fortify(const void* const __pass_object_size s, int c, size_t n) __overloadable {
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size_t bos = __bos(s);
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if (__bos_trivially_ge(bos, n)) {
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return __memrchr_real(s, c, n);
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}
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return __memrchr_chk(s, c, n, bos);
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}
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#endif
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#if __ANDROID_API__ >= 21 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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/* No diag -- clang diagnoses misuses of this on its own. */
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__BIONIC_FORTIFY_INLINE
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char* stpncpy(char* const dst __pass_object_size, const char* const src __pass_object_size, size_t n)
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__diagnose_as_builtin(__builtin_stpncpy, 1, 2, 3)
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__overloadable {
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size_t bos_dst = __bos(dst);
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size_t bos_src = __bos(src);
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/* Ignore dst size checks; they're handled in strncpy_chk */
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if (bos_src == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __builtin___stpncpy_chk(dst, src, n, bos_dst);
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}
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return __stpncpy_chk2(dst, src, n, bos_dst, bos_src);
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}
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/* No diag -- clang diagnoses misuses of this on its own. */
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__BIONIC_FORTIFY_INLINE
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char* strncpy(char* const dst __pass_object_size, const char* const src __pass_object_size, size_t n)
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__diagnose_as_builtin(__builtin_strncpy, 1, 2, 3)
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__overloadable {
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size_t bos_dst = __bos(dst);
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size_t bos_src = __bos(src);
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/* Ignore dst size checks; they're handled in strncpy_chk */
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if (bos_src == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __builtin___strncpy_chk(dst, src, n, bos_dst);
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}
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return __strncpy_chk2(dst, src, n, bos_dst, bos_src);
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}
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#endif
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__BIONIC_FORTIFY_INLINE
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size_t strlcpy(char* const dst __pass_object_size, const char* src, size_t size)
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__overloadable
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__clang_error_if(__bos_unevaluated_lt(__bos(dst), size),
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"'strlcpy' called with size bigger than buffer") {
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#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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return __strlcpy_chk(dst, src, size, __bos(dst));
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#else
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return __call_bypassing_fortify(strlcpy)(dst, src, size);
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#endif
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}
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__BIONIC_FORTIFY_INLINE
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size_t strlcat(char* const dst __pass_object_size, const char* src, size_t size)
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__overloadable
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__clang_error_if(__bos_unevaluated_lt(__bos(dst), size),
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"'strlcat' called with size bigger than buffer") {
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#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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return __strlcat_chk(dst, src, size, __bos(dst));
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#else
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return __call_bypassing_fortify(strlcat)(dst, src, size);
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#endif
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}
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#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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__BIONIC_FORTIFY_INLINE
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size_t strlen(const char* const s __pass_object_size0) __overloadable {
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return __strlen_chk(s, __bos0(s));
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}
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#endif
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__BIONIC_FORTIFY_INLINE
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char* strchr(const char* const s __pass_object_size, int c) __overloadable {
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#if __ANDROID_API__ >= 18 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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size_t bos = __bos(s);
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if (bos != __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __strchr_chk(s, c, bos);
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}
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#endif
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return __builtin_strchr(s, c);
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}
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__BIONIC_FORTIFY_INLINE
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char* strrchr(const char* const s __pass_object_size, int c) __overloadable {
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#if __ANDROID_API__ >= 18 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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size_t bos = __bos(s);
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if (bos != __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __strrchr_chk(s, c, bos);
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}
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#endif
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return __builtin_strrchr(s, c);
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}
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#if __ANDROID_API__ >= 23 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
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#if defined(__cplusplus)
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extern "C++" {
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__BIONIC_FORTIFY_INLINE
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void* memrchr(void* const __pass_object_size s, int c, size_t n) {
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return __memrchr_fortify(s, c, n);
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}
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__BIONIC_FORTIFY_INLINE
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const void* memrchr(const void* const __pass_object_size s, int c, size_t n) {
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return __memrchr_fortify(s, c, n);
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}
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}
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#else
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__BIONIC_FORTIFY_INLINE
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void* memrchr(const void* const __pass_object_size s, int c, size_t n) __overloadable {
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return __memrchr_fortify(s, c, n);
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}
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#endif
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#endif /* __ANDROID_API__ >= 23 */
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#endif /* defined(__BIONIC_FORTIFY) */
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