diff options
Diffstat (limited to 'src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorApple.c')
| -rw-r--r-- | src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorApple.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorApple.c b/src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorApple.c new file mode 100644 index 0000000000..95b9842fa9 --- /dev/null +++ b/src/3rdparty/pcre2/src/sljit/allocator_src/sljitExecAllocatorApple.c @@ -0,0 +1,133 @@ +/* + * Stack-less Just-In-Time compiler + * + * Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, are + * permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this list of + * conditions and the following disclaimer. + * + * 2. 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 HOLDER(S) 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 HOLDER(S) 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. + */ + +#include <sys/types.h> +#include <sys/mman.h> +/* + On macOS systems, returns MAP_JIT if it is defined _and_ we're running on a + version where it's OK to have more than one JIT block or where MAP_JIT is + required. + On non-macOS systems, returns MAP_JIT if it is defined. +*/ +#include <TargetConditionals.h> + +#if (defined(TARGET_OS_OSX) && TARGET_OS_OSX) || (TARGET_OS_MAC && !TARGET_OS_IPHONE) + +#if defined(SLJIT_CONFIG_X86) && SLJIT_CONFIG_X86 + +#include <sys/utsname.h> +#include <stdlib.h> + +#define SLJIT_MAP_JIT (get_map_jit_flag()) +#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec) + +static SLJIT_INLINE int get_map_jit_flag(void) +{ + size_t page_size; + void *ptr; + struct utsname name; + static int map_jit_flag = -1; + + if (map_jit_flag < 0) { + map_jit_flag = 0; + uname(&name); + + /* Kernel version for 10.14.0 (Mojave) or later */ + if (atoi(name.release) >= 18) { + page_size = get_page_alignment() + 1; + /* Only use MAP_JIT if a hardened runtime is used */ + ptr = mmap(NULL, page_size, PROT_WRITE | PROT_EXEC, + MAP_PRIVATE | MAP_ANON, -1, 0); + + if (ptr != MAP_FAILED) + munmap(ptr, page_size); + else + map_jit_flag = MAP_JIT; + } + } + return map_jit_flag; +} + +#elif defined(SLJIT_CONFIG_ARM) && SLJIT_CONFIG_ARM + +#include <AvailabilityMacros.h> +#include <pthread.h> + +#define SLJIT_MAP_JIT (MAP_JIT) +#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec) \ + apple_update_wx_flags(enable_exec) + +static SLJIT_INLINE void apple_update_wx_flags(sljit_s32 enable_exec) +{ +#if MAC_OS_X_VERSION_MIN_REQUIRED < 110000 + if (__builtin_available(macos 11, *)) +#endif /* BigSur */ + pthread_jit_write_protect_np(enable_exec); +} + +#elif defined(SLJIT_CONFIG_PPC) && SLJIT_CONFIG_PPC + +#define SLJIT_MAP_JIT (0) +#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec) + +#else +#error "Unsupported architecture" +#endif /* SLJIT_CONFIG */ + +#else /* !TARGET_OS_OSX */ + +#ifdef MAP_JIT +#define SLJIT_MAP_JIT (MAP_JIT) +#else +#define SLJIT_MAP_JIT (0) +#endif + +#endif /* TARGET_OS_OSX */ + +static SLJIT_INLINE void* alloc_chunk(sljit_uw size) +{ + void *retval; + int prot = PROT_READ | PROT_WRITE | PROT_EXEC; + int flags = MAP_PRIVATE; + int fd = -1; + + flags |= MAP_ANON | SLJIT_MAP_JIT; + + retval = mmap(NULL, size, prot, flags, fd, 0); + if (retval == MAP_FAILED) + return NULL; + + SLJIT_UPDATE_WX_FLAGS(retval, (uint8_t *)retval + size, 0); + + return retval; +} + +static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size) +{ + munmap(chunk, size); +} + +#include "sljitExecAllocatorCore.c" |