From 742a65a4d308f29f8711667462cbc655f9660c34 Mon Sep 17 00:00:00 2001 From: Giuseppe D'Angelo Date: Sun, 3 Jan 2016 14:30:13 +0100 Subject: PCRE2: import of PCRE2 10.22 Change-Id: Ib2c6210568e8d2f313c5cfcdfdf0a2f09ee356db Reviewed-by: Lars Knoll --- src/3rdparty/pcre2/src/sljit/sljitUtils.c | 337 ++++++++++++++++++++++++++++++ 1 file changed, 337 insertions(+) create mode 100644 src/3rdparty/pcre2/src/sljit/sljitUtils.c (limited to 'src/3rdparty/pcre2/src/sljit/sljitUtils.c') diff --git a/src/3rdparty/pcre2/src/sljit/sljitUtils.c b/src/3rdparty/pcre2/src/sljit/sljitUtils.c new file mode 100644 index 0000000000..ec5c321194 --- /dev/null +++ b/src/3rdparty/pcre2/src/sljit/sljitUtils.c @@ -0,0 +1,337 @@ +/* + * Stack-less Just-In-Time compiler + * + * Copyright 2009-2012 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. + */ + +/* ------------------------------------------------------------------------ */ +/* Locks */ +/* ------------------------------------------------------------------------ */ + +#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) || (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) + +#if (defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED) + +#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) + +static SLJIT_INLINE void allocator_grab_lock(void) +{ + /* Always successful. */ +} + +static SLJIT_INLINE void allocator_release_lock(void) +{ + /* Always successful. */ +} + +#endif /* SLJIT_EXECUTABLE_ALLOCATOR */ + +#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void) +{ + /* Always successful. */ +} + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) +{ + /* Always successful. */ +} + +#endif /* SLJIT_UTIL_GLOBAL_LOCK */ + +#elif defined(_WIN32) /* SLJIT_SINGLE_THREADED */ + +#include "windows.h" + +#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) + +static HANDLE allocator_mutex = 0; + +static SLJIT_INLINE void allocator_grab_lock(void) +{ + /* No idea what to do if an error occures. Static mutexes should never fail... */ + if (!allocator_mutex) + allocator_mutex = CreateMutex(NULL, TRUE, NULL); + else + WaitForSingleObject(allocator_mutex, INFINITE); +} + +static SLJIT_INLINE void allocator_release_lock(void) +{ + ReleaseMutex(allocator_mutex); +} + +#endif /* SLJIT_EXECUTABLE_ALLOCATOR */ + +#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) + +static HANDLE global_mutex = 0; + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void) +{ + /* No idea what to do if an error occures. Static mutexes should never fail... */ + if (!global_mutex) + global_mutex = CreateMutex(NULL, TRUE, NULL); + else + WaitForSingleObject(global_mutex, INFINITE); +} + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) +{ + ReleaseMutex(global_mutex); +} + +#endif /* SLJIT_UTIL_GLOBAL_LOCK */ + +#else /* _WIN32 */ + +#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) + +#include + +static pthread_mutex_t allocator_mutex = PTHREAD_MUTEX_INITIALIZER; + +static SLJIT_INLINE void allocator_grab_lock(void) +{ + pthread_mutex_lock(&allocator_mutex); +} + +static SLJIT_INLINE void allocator_release_lock(void) +{ + pthread_mutex_unlock(&allocator_mutex); +} + +#endif /* SLJIT_EXECUTABLE_ALLOCATOR */ + +#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) + +#include + +static pthread_mutex_t global_mutex = PTHREAD_MUTEX_INITIALIZER; + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void) +{ + pthread_mutex_lock(&global_mutex); +} + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) +{ + pthread_mutex_unlock(&global_mutex); +} + +#endif /* SLJIT_UTIL_GLOBAL_LOCK */ + +#endif /* _WIN32 */ + +/* ------------------------------------------------------------------------ */ +/* Stack */ +/* ------------------------------------------------------------------------ */ + +#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) || (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) + +#ifdef _WIN32 +#include "windows.h" +#else +/* Provides mmap function. */ +#include +/* For detecting the page size. */ +#include + +#ifndef MAP_ANON + +#include + +/* Some old systems does not have MAP_ANON. */ +static sljit_s32 dev_zero = -1; + +#if (defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED) + +static SLJIT_INLINE sljit_s32 open_dev_zero(void) +{ + dev_zero = open("/dev/zero", O_RDWR); + return dev_zero < 0; +} + +#else /* SLJIT_SINGLE_THREADED */ + +#include + +static pthread_mutex_t dev_zero_mutex = PTHREAD_MUTEX_INITIALIZER; + +static SLJIT_INLINE sljit_s32 open_dev_zero(void) +{ + pthread_mutex_lock(&dev_zero_mutex); + /* The dev_zero might be initialized by another thread during the waiting. */ + if (dev_zero < 0) { + dev_zero = open("/dev/zero", O_RDWR); + } + pthread_mutex_unlock(&dev_zero_mutex); + return dev_zero < 0; +} + +#endif /* SLJIT_SINGLE_THREADED */ + +#endif + +#endif + +#endif /* SLJIT_UTIL_STACK || SLJIT_EXECUTABLE_ALLOCATOR */ + +#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) + +/* Planning to make it even more clever in the future. */ +static sljit_sw sljit_page_align = 0; + +SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(sljit_uw limit, sljit_uw max_limit, void *allocator_data) +{ + struct sljit_stack *stack; + union { + void *ptr; + sljit_uw uw; + } base; +#ifdef _WIN32 + SYSTEM_INFO si; +#endif + + SLJIT_UNUSED_ARG(allocator_data); + if (limit > max_limit || limit < 1) + return NULL; + +#ifdef _WIN32 + if (!sljit_page_align) { + GetSystemInfo(&si); + sljit_page_align = si.dwPageSize - 1; + } +#else + if (!sljit_page_align) { + sljit_page_align = sysconf(_SC_PAGESIZE); + /* Should never happen. */ + if (sljit_page_align < 0) + sljit_page_align = 4096; + sljit_page_align--; + } +#endif + + /* Align limit and max_limit. */ + max_limit = (max_limit + sljit_page_align) & ~sljit_page_align; + + stack = (struct sljit_stack*)SLJIT_MALLOC(sizeof(struct sljit_stack), allocator_data); + if (!stack) + return NULL; + +#ifdef _WIN32 + base.ptr = VirtualAlloc(NULL, max_limit, MEM_RESERVE, PAGE_READWRITE); + if (!base.ptr) { + SLJIT_FREE(stack, allocator_data); + return NULL; + } + stack->base = base.uw; + stack->limit = stack->base; + stack->max_limit = stack->base + max_limit; + if (sljit_stack_resize(stack, stack->base + limit)) { + sljit_free_stack(stack, allocator_data); + return NULL; + } +#else +#ifdef MAP_ANON + base.ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); +#else + if (dev_zero < 0) { + if (open_dev_zero()) { + SLJIT_FREE(stack, allocator_data); + return NULL; + } + } + base.ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE, dev_zero, 0); +#endif + if (base.ptr == MAP_FAILED) { + SLJIT_FREE(stack, allocator_data); + return NULL; + } + stack->base = base.uw; + stack->limit = stack->base + limit; + stack->max_limit = stack->base + max_limit; +#endif + stack->top = stack->base; + return stack; +} + +#undef PAGE_ALIGN + +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack* stack, void *allocator_data) +{ + SLJIT_UNUSED_ARG(allocator_data); +#ifdef _WIN32 + VirtualFree((void*)stack->base, 0, MEM_RELEASE); +#else + munmap((void*)stack->base, stack->max_limit - stack->base); +#endif + SLJIT_FREE(stack, allocator_data); +} + +SLJIT_API_FUNC_ATTRIBUTE sljit_sw SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_uw new_limit) +{ + sljit_uw aligned_old_limit; + sljit_uw aligned_new_limit; + + if ((new_limit > stack->max_limit) || (new_limit < stack->base)) + return -1; +#ifdef _WIN32 + aligned_new_limit = (new_limit + sljit_page_align) & ~sljit_page_align; + aligned_old_limit = (stack->limit + sljit_page_align) & ~sljit_page_align; + if (aligned_new_limit != aligned_old_limit) { + if (aligned_new_limit > aligned_old_limit) { + if (!VirtualAlloc((void*)aligned_old_limit, aligned_new_limit - aligned_old_limit, MEM_COMMIT, PAGE_READWRITE)) + return -1; + } + else { + if (!VirtualFree((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MEM_DECOMMIT)) + return -1; + } + } + stack->limit = new_limit; + return 0; +#else + if (new_limit >= stack->limit) { + stack->limit = new_limit; + return 0; + } + aligned_new_limit = (new_limit + sljit_page_align) & ~sljit_page_align; + aligned_old_limit = (stack->limit + sljit_page_align) & ~sljit_page_align; + /* If madvise is available, we release the unnecessary space. */ +#if defined(MADV_DONTNEED) + if (aligned_new_limit < aligned_old_limit) + madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MADV_DONTNEED); +#elif defined(POSIX_MADV_DONTNEED) + if (aligned_new_limit < aligned_old_limit) + posix_madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, POSIX_MADV_DONTNEED); +#endif + stack->limit = new_limit; + return 0; +#endif +} + +#endif /* SLJIT_UTIL_STACK */ + +#endif -- cgit v1.2.3