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string:use builtin function to optimize libc function

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This allows the compiler to automatically identify which string functions
can be compiled into libraries, and the compiler's internal implementation
is faster than libc functions.

Signed-off-by: anjiahao <anjiahao@xiaomi.com>
This commit is contained in:
anjiahao
2025-01-10 11:46:01 +08:00
committed by Xiang Xiao
parent 4028132910
commit 7c96537a58
23 changed files with 275 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libs/libc/machine/arch_libc.c
+22 -1
View File
@@ -103,7 +103,8 @@ extern void __asan_storeN(FAR void *addr, size_t size);
****************************************************************************/
#ifdef CONFIG_LIBC_ARCH_MEMCHR
#undef memchr
no_builtin("memchr")
FAR void *memchr(FAR const void *s, int c, size_t n)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -117,6 +118,8 @@ FAR void *memchr(FAR const void *s, int c, size_t n)
#endif
#ifdef CONFIG_LIBC_ARCH_MEMCPY
#undef memcpy
no_builtin("memcpy")
FAR void *memcpy(FAR void *dest, FAR const void *src, FAR size_t n)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -132,6 +135,8 @@ FAR void *memcpy(FAR void *dest, FAR const void *src, FAR size_t n)
#endif
#ifdef CONFIG_LIBC_ARCH_MEMCMP
#undef memcmp
no_builtin("memcmp")
int memcmp(FAR const void *s1, FAR const void *s2, size_t n)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -160,6 +165,8 @@ FAR void *memmove(FAR void *dest, FAR const void *src, FAR size_t n)
#endif
#ifdef CONFIG_LIBC_ARCH_MEMSET
#undef memset
no_builtin("memset")
FAR void *memset(FAR void *s, int c, FAR size_t n)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -172,6 +179,8 @@ FAR void *memset(FAR void *s, int c, FAR size_t n)
#endif
#ifdef CONFIG_LIBC_ARCH_STRCMP
#undef strcmp
no_builtin("strcmp")
int strcmp(FAR const char *s1, FAR const char *s2)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -185,6 +194,8 @@ int strcmp(FAR const char *s1, FAR const char *s2)
#endif
#ifdef CONFIG_LIBC_ARCH_STRCPY
#undef strcpy
no_builtin("strcpy")
FAR char *strcpy(FAR char *dest, FAR const char *src)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -200,6 +211,8 @@ FAR char *strcpy(FAR char *dest, FAR const char *src)
#endif
#ifdef CONFIG_LIBC_ARCH_STRLEN
#undef strlen
no_builtin("strlen")
size_t strlen(FAR const char *s)
{
size_t ret = ARCH_LIBCFUN(strlen)(s);
@@ -213,6 +226,8 @@ size_t strlen(FAR const char *s)
#endif
#ifdef CONFIG_LIBC_ARCH_STRNCPY
#undef strncpy
no_builtin("strncpy")
FAR char *strncpy(FAR char *dest, FAR const char *src, size_t n)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -228,6 +243,8 @@ FAR char *strncpy(FAR char *dest, FAR const char *src, size_t n)
#endif
#ifdef CONFIG_LIBC_ARCH_STRCHR
#undef strchr
no_builtin("strchr")
FAR char *strchr(FAR const char *s, int c)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -253,6 +270,8 @@ FAR char *strchrnul(FAR const char *s, int c)
#endif
#ifdef CONFIG_LIBC_ARCH_STRNCMP
#undef strncmp
no_builtin("strncmp")
int strncmp(FAR const char *s1, FAR const char *s2, size_t n)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
@@ -285,6 +304,8 @@ size_t strnlen(FAR const char *s, size_t maxlen)
#endif
#ifdef CONFIG_LIBC_ARCH_STRRCHR
#undef strrchr
no_builtin("strrchr")
FAR char *strrchr(FAR const char *s, int c)
{
# ifdef CONFIG_MM_KASAN_INSTRUMENT
libs/libc/string/lib_bsdmemchr.c
+1
View File
@@ -74,6 +74,7 @@
#if !defined(CONFIG_LIBC_ARCH_MEMCHR) && defined(LIBC_BUILD_MEMCHR)
#undef memchr
no_builtin("memchr")
FAR void *memchr(FAR const void *s, int c, size_t n)
{
FAR const unsigned char *p = (FAR const unsigned char *)s;
libs/libc/string/lib_bsdstpcpy.c
+1
View File
@@ -62,6 +62,7 @@
#ifndef CONFIG_LIBC_ARCH_STPCPY
#undef stpcpy
no_builtin("stpcpy")
nosanitize_address
FAR char *stpcpy(FAR char *dest, FAR const char *src)
{
libs/libc/string/lib_bsdstpncpy.c
+1
View File
@@ -78,6 +78,7 @@
#ifndef CONFIG_LIBC_ARCH_STPNCPY
#undef stpncpy
no_builtin("stpncpy")
FAR char *stpncpy(FAR char *dest, FAR const char *src, size_t n)
{
FAR char *ret = NULL;
libs/libc/string/lib_bsdstrcat.c
+1
View File
@@ -49,6 +49,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRCAT) && defined(LIBC_BUILD_STRCAT)
#undef strcat
no_builtin("strcat")
nosanitize_address
FAR char *strcat(FAR char *dest, FAR const char *src)
{
libs/libc/string/lib_bsdstrchr.c
+1
View File
@@ -68,6 +68,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRCHR) && defined(LIBC_BUILD_STRCHR)
#undef strchr
no_builtin("strchr")
nosanitize_address
FAR char *strchr(FAR const char *s, int c)
{
libs/libc/string/lib_bsdstrcmp.c
+1
View File
@@ -51,6 +51,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRCMP) && defined(LIBC_BUILD_STRCMP)
#undef strcmp
no_builtin("strcmp")
nosanitize_address
int strcmp(FAR const char *cs, FAR const char *ct)
{
libs/libc/string/lib_bsdstrcpy.c
+1
View File
@@ -64,6 +64,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRCPY) && defined(LIBC_BUILD_STRCPY)
#undef strcpy
nosanitize_address
no_builtin("strcpy")
FAR char *strcpy(FAR char *dest, FAR const char *src)
{
FAR char *dst0 = dest;
libs/libc/string/lib_bsdstrlen.c
+1
View File
@@ -49,6 +49,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRLEN) && defined(LIBC_BUILD_STRLEN)
#undef strlen
no_builtin("strlen")
nosanitize_address
size_t strlen(FAR const char *s)
{
libs/libc/string/lib_bsdstrncmp.c
+1
View File
@@ -53,6 +53,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRNCMP) && defined(LIBC_BUILD_STRNCMP)
#undef strncmp
no_builtin("strncmp")
nosanitize_address
int strncmp(FAR const char *cs, FAR const char *ct, size_t nb)
{
libs/libc/string/lib_bsdstrncpy.c
+1
View File
@@ -77,6 +77,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRNCPY) && defined(LIBC_BUILD_STRNCPY)
#undef strncpy
nosanitize_address
no_builtin("strncpy")
FAR char *strncpy(FAR char *dest, FAR const char *src, size_t n)
{
FAR char *dst0 = dest;
libs/libc/string/lib_bsdstrrchr.c
+1
View File
@@ -36,6 +36,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRRCHR) && defined(LIBC_BUILD_STRRCHR)
#undef strrchr
no_builtin("strrchr")
FAR char *strrchr(FAR const char *s, int c)
{
FAR const char *last = NULL;
libs/libc/string/lib_memchr.c
+1
View File
@@ -50,6 +50,7 @@
#if !defined(CONFIG_LIBC_ARCH_MEMCHR) && defined(LIBC_BUILD_MEMCHR)
#undef memchr
no_builtin("memchr")
FAR void *memchr(FAR const void *s, int c, size_t n)
{
FAR const unsigned char *p = (FAR const unsigned char *)s;
libs/libc/string/lib_strcat.c
+1
View File
@@ -36,6 +36,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRCAT) && defined(LIBC_BUILD_STRCAT)
#undef strcat
no_builtin("strcat")
FAR char *strcat(FAR char *dest, FAR const char *src)
{
FAR char *ret = dest;
libs/libc/string/lib_strchr.c
+1
View File
@@ -50,6 +50,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRCHR) && defined(LIBC_BUILD_STRCHR)
#undef strchr
no_builtin("strchr")
FAR char *strchr(FAR const char *s, int c)
{
for (; ; s++)
libs/libc/string/lib_strcpy.c
+1
View File
@@ -48,6 +48,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRCPY) && defined(LIBC_BUILD_STRCPY)
#undef strcpy
no_builtin("strcpy")
FAR char *strcpy(FAR char *dest, FAR const char *src)
{
FAR char *tmp = dest;
libs/libc/string/lib_strcspn.c
+1
View File
@@ -42,6 +42,7 @@
****************************************************************************/
#undef strcspn
no_builtin("strcspn")
size_t strcspn(const char *s, const char *reject)
{
size_t i;
libs/libc/string/lib_strlen.c
+1
View File
@@ -36,6 +36,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRLEN) && defined(LIBC_BUILD_STRLEN)
#undef strlen
no_builtin("strlen")
size_t strlen(FAR const char *s)
{
FAR const char *sc;
libs/libc/string/lib_strncmp.c
+1
View File
@@ -36,6 +36,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRNCMP) && defined(LIBC_BUILD_STRNCMP)
#undef strncmp
no_builtin("strncmp")
int strncmp(FAR const char *cs, FAR const char *ct, size_t nb)
{
register int result = 0;
libs/libc/string/lib_strrchr.c
+1
View File
@@ -40,6 +40,7 @@
#if !defined(CONFIG_LIBC_ARCH_STRRCHR) && defined(LIBC_BUILD_STRRCHR)
#undef strrchr
no_builtin("strrchr")
FAR char *strrchr(FAR const char *s, int c)
{
FAR const char *r = NULL;
libs/libc/string/lib_strstr.c
+1
View File
@@ -53,6 +53,7 @@
*/
#undef strstr
no_builtin("strstr")
FAR char *strstr(FAR const char *haystack, FAR const char *needle)
{
#ifdef CONFIG_ALLOW_MIT_COMPONENTS