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