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https://github.com/php/php-src.git
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d1f14a4609
Previously: GH-13413.
This version also contains a fix with `preg_match('\X')`, so that it
can correctly detect grapheme clusters (PCRE2Project/pcre2#410).
This is useful to correctly [polyfill the new `grapheme_str_split`
function](https://php.watch/versions/8.4/grapheme_str_split#polyfill).
Diff: pcre2lib [v10.43..v10.44](https://github.com/PCRE2Project/pcre2/compare/pcre2-10.43...pcre2-10.44)
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*
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* Stack-less Just-In-Time compiler
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*
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* Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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/*
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On macOS systems, returns MAP_JIT if it is defined _and_ we're running on a
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version where it's OK to have more than one JIT block or where MAP_JIT is
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required.
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On non-macOS systems, returns MAP_JIT if it is defined.
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*/
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#include <TargetConditionals.h>
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#if (defined(TARGET_OS_OSX) && TARGET_OS_OSX) || (TARGET_OS_MAC && !TARGET_OS_IPHONE)
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#if defined(SLJIT_CONFIG_X86) && SLJIT_CONFIG_X86
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#include <sys/utsname.h>
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#include <stdlib.h>
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#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec)
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#ifdef MAP_JIT
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#define SLJIT_MAP_JIT (get_map_jit_flag())
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static SLJIT_INLINE int get_map_jit_flag(void)
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{
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size_t page_size;
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void *ptr;
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struct utsname name;
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static int map_jit_flag = -1;
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if (map_jit_flag < 0) {
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map_jit_flag = 0;
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uname(&name);
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/* Kernel version for 10.14.0 (Mojave) or later */
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if (atoi(name.release) >= 18) {
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page_size = get_page_alignment() + 1;
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/* Only use MAP_JIT if a hardened runtime is used */
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ptr = mmap(NULL, page_size, PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE | MAP_ANON, -1, 0);
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if (ptr != MAP_FAILED)
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munmap(ptr, page_size);
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else
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map_jit_flag = MAP_JIT;
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}
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}
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return map_jit_flag;
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}
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#else /* !defined(MAP_JIT) */
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#define SLJIT_MAP_JIT (0)
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#endif
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#elif defined(SLJIT_CONFIG_ARM) && SLJIT_CONFIG_ARM
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#include <AvailabilityMacros.h>
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#include <pthread.h>
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#define SLJIT_MAP_JIT (MAP_JIT)
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#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec) \
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apple_update_wx_flags(enable_exec)
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static SLJIT_INLINE void apple_update_wx_flags(sljit_s32 enable_exec)
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{
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#if MAC_OS_X_VERSION_MIN_REQUIRED < 110000
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if (__builtin_available(macos 11, *))
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#endif /* BigSur */
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pthread_jit_write_protect_np(enable_exec);
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}
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#elif defined(SLJIT_CONFIG_PPC) && SLJIT_CONFIG_PPC
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#define SLJIT_MAP_JIT (0)
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#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec)
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#else
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#error "Unsupported architecture"
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#endif /* SLJIT_CONFIG */
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#else /* !TARGET_OS_OSX */
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#ifdef MAP_JIT
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#define SLJIT_MAP_JIT (MAP_JIT)
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#else
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#define SLJIT_MAP_JIT (0)
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#endif
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#endif /* TARGET_OS_OSX */
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static SLJIT_INLINE void* alloc_chunk(sljit_uw size)
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{
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void *retval;
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int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
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int flags = MAP_PRIVATE;
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int fd = -1;
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flags |= MAP_ANON | SLJIT_MAP_JIT;
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retval = mmap(NULL, size, prot, flags, fd, 0);
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if (retval == MAP_FAILED)
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return NULL;
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SLJIT_UPDATE_WX_FLAGS(retval, (uint8_t *)retval + size, 0);
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return retval;
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}
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static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size)
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{
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munmap(chunk, size);
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}
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#include "sljitExecAllocatorCore.c"
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