diff options
Diffstat (limited to 'src/3rdparty/pcre2/src/sljit/sljitUtils.c')
| -rw-r--r-- | src/3rdparty/pcre2/src/sljit/sljitUtils.c | 261 |
1 files changed, 94 insertions, 167 deletions
diff --git a/src/3rdparty/pcre2/src/sljit/sljitUtils.c b/src/3rdparty/pcre2/src/sljit/sljitUtils.c index 0276fa1b8b..08ca35cf37 100644 --- a/src/3rdparty/pcre2/src/sljit/sljitUtils.c +++ b/src/3rdparty/pcre2/src/sljit/sljitUtils.c @@ -28,131 +28,50 @@ /* Locks */ /* ------------------------------------------------------------------------ */ -#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) || (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) +/* Executable Allocator */ +#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) \ + && !(defined SLJIT_WX_EXECUTABLE_ALLOCATOR && SLJIT_WX_EXECUTABLE_ALLOCATOR) #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_FUNC sljit_grab_lock(void) -{ - /* Always successful. */ -} - -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC 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_FUNC 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_FUNC sljit_release_lock(void) -{ - ReleaseMutex(global_mutex); -} - -#endif /* SLJIT_UTIL_GLOBAL_LOCK */ - -#else /* _WIN32 */ - -#if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) - +#define SLJIT_ALLOCATOR_LOCK() +#define SLJIT_ALLOCATOR_UNLOCK() +#elif !(defined _WIN32) #include <pthread.h> -static pthread_mutex_t allocator_mutex = PTHREAD_MUTEX_INITIALIZER; - -static SLJIT_INLINE void allocator_grab_lock(void) -{ - pthread_mutex_lock(&allocator_mutex); -} +static pthread_mutex_t allocator_lock = PTHREAD_MUTEX_INITIALIZER; -static SLJIT_INLINE void allocator_release_lock(void) -{ - pthread_mutex_unlock(&allocator_mutex); -} +#define SLJIT_ALLOCATOR_LOCK() pthread_mutex_lock(&allocator_lock) +#define SLJIT_ALLOCATOR_UNLOCK() pthread_mutex_unlock(&allocator_lock) +#else /* windows */ +static HANDLE allocator_lock; -#endif /* SLJIT_EXECUTABLE_ALLOCATOR */ - -#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) - -#include <pthread.h> - -static pthread_mutex_t global_mutex = PTHREAD_MUTEX_INITIALIZER; - -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_grab_lock(void) -{ - pthread_mutex_lock(&global_mutex); -} - -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_release_lock(void) +static SLJIT_INLINE void allocator_grab_lock(void) { - pthread_mutex_unlock(&global_mutex); + HANDLE lock; + if (SLJIT_UNLIKELY(!allocator_lock)) { + lock = CreateMutex(NULL, FALSE, NULL); + if (InterlockedCompareExchangePointer(&allocator_lock, lock, NULL)) + CloseHandle(lock); + } + WaitForSingleObject(allocator_lock, INFINITE); } -#endif /* SLJIT_UTIL_GLOBAL_LOCK */ - -#endif /* _WIN32 */ +#define SLJIT_ALLOCATOR_LOCK() allocator_grab_lock() +#define SLJIT_ALLOCATOR_UNLOCK() ReleaseMutex(allocator_lock) +#endif /* thread implementation */ +#endif /* SLJIT_EXECUTABLE_ALLOCATOR && !SLJIT_WX_EXECUTABLE_ALLOCATOR */ /* ------------------------------------------------------------------------ */ /* Stack */ /* ------------------------------------------------------------------------ */ -#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) || (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) +#if ((defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) \ + && !(defined SLJIT_UTIL_SIMPLE_STACK_ALLOCATION && SLJIT_UTIL_SIMPLE_STACK_ALLOCATION)) \ + || ((defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) \ + && !((defined SLJIT_PROT_EXECUTABLE_ALLOCATOR && SLJIT_PROT_EXECUTABLE_ALLOCATOR) \ + || (defined SLJIT_WX_EXECUTABLE_ALLOCATOR && SLJIT_WX_EXECUTABLE_ALLOCATOR))) -#ifdef _WIN32 -#include "windows.h" -#else /* !_WIN32 */ +#ifndef _WIN32 /* Provides mmap function. */ #include <sys/types.h> #include <sys/mman.h> @@ -163,56 +82,84 @@ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_release_lock(void) #endif /* MAP_ANONYMOUS */ #endif /* !MAP_ANON */ -#ifndef MADV_DONTNEED -#ifdef POSIX_MADV_DONTNEED -#define MADV_DONTNEED POSIX_MADV_DONTNEED -#endif /* POSIX_MADV_DONTNEED */ -#endif /* !MADV_DONTNEED */ - -/* For detecting the page size. */ -#include <unistd.h> - #ifndef MAP_ANON #include <fcntl.h> -/* Some old systems does not have MAP_ANON. */ -static sljit_s32 dev_zero = -1; +#ifdef O_CLOEXEC +#define SLJIT_CLOEXEC O_CLOEXEC +#else /* !O_CLOEXEC */ +#define SLJIT_CLOEXEC 0 +#endif /* O_CLOEXEC */ + +/* Some old systems do not have MAP_ANON. */ +static int dev_zero = -1; #if (defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED) -static SLJIT_INLINE sljit_s32 open_dev_zero(void) +static SLJIT_INLINE int open_dev_zero(void) { - dev_zero = open("/dev/zero", O_RDWR); + dev_zero = open("/dev/zero", O_RDWR | SLJIT_CLOEXEC); + return dev_zero < 0; } -#else /* SLJIT_SINGLE_THREADED */ +#else /* !SLJIT_SINGLE_THREADED */ #include <pthread.h> static pthread_mutex_t dev_zero_mutex = PTHREAD_MUTEX_INITIALIZER; -static SLJIT_INLINE sljit_s32 open_dev_zero(void) +static SLJIT_INLINE int 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); - } + if (SLJIT_UNLIKELY(dev_zero < 0)) + dev_zero = open("/dev/zero", O_RDWR | SLJIT_CLOEXEC); + pthread_mutex_unlock(&dev_zero_mutex); return dev_zero < 0; } #endif /* SLJIT_SINGLE_THREADED */ - +#undef SLJIT_CLOEXEC #endif /* !MAP_ANON */ +#endif /* !_WIN32 */ +#endif /* open_dev_zero */ -#endif /* _WIN32 */ +#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) \ + || (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) -#endif /* SLJIT_UTIL_STACK || SLJIT_EXECUTABLE_ALLOCATOR */ +#ifdef _WIN32 -#endif /* SLJIT_EXECUTABLE_ALLOCATOR || SLJIT_UTIL_GLOBAL_LOCK */ +static SLJIT_INLINE sljit_sw get_page_alignment(void) { + SYSTEM_INFO si; + static sljit_sw sljit_page_align; + if (!sljit_page_align) { + GetSystemInfo(&si); + sljit_page_align = si.dwPageSize - 1; + } + return sljit_page_align; +} + +#else + +#include <unistd.h> + +static SLJIT_INLINE sljit_sw get_page_alignment(void) { + static sljit_sw sljit_page_align; + 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--; + } + return sljit_page_align; +} + +#endif /* _WIN32 */ + +#endif /* get_page_alignment() */ #if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) @@ -264,16 +211,6 @@ SLJIT_API_FUNC_ATTRIBUTE sljit_u8 *SLJIT_FUNC sljit_stack_resize(struct sljit_st #ifdef _WIN32 -SLJIT_INLINE static sljit_sw get_page_alignment(void) { - SYSTEM_INFO si; - static sljit_sw sljit_page_align; - if (!sljit_page_align) { - GetSystemInfo(&si); - sljit_page_align = si.dwPageSize - 1; - } - return sljit_page_align; -} - SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_free_stack(struct sljit_stack *stack, void *allocator_data) { SLJIT_UNUSED_ARG(allocator_data); @@ -281,19 +218,7 @@ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_free_stack(struct sljit_stack *st SLJIT_FREE(stack, allocator_data); } -#else /* ! defined _WIN32 */ - -SLJIT_INLINE static sljit_sw get_page_alignment(void) { - static sljit_sw sljit_page_align; - 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--; - } - return sljit_page_align; -} +#else /* !_WIN32 */ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_free_stack(struct sljit_stack *stack, void *allocator_data) { @@ -302,7 +227,7 @@ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_free_stack(struct sljit_stack *st SLJIT_FREE(stack, allocator_data); } -#endif /* defined _WIN32 */ +#endif /* _WIN32 */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_FUNC sljit_allocate_stack(sljit_uw start_size, sljit_uw max_size, void *allocator_data) { @@ -342,11 +267,9 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_FUNC sljit_allocate_stack(slj #ifdef MAP_ANON ptr = mmap(NULL, max_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); #else /* !MAP_ANON */ - if (dev_zero < 0) { - if (open_dev_zero() != 0) { - SLJIT_FREE(stack, allocator_data); - return NULL; - } + if (SLJIT_UNLIKELY((dev_zero < 0) && open_dev_zero())) { + SLJIT_FREE(stack, allocator_data); + return NULL; } ptr = mmap(NULL, max_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, dev_zero, 0); #endif /* MAP_ANON */ @@ -365,7 +288,7 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_FUNC sljit_allocate_stack(slj SLJIT_API_FUNC_ATTRIBUTE sljit_u8 *SLJIT_FUNC sljit_stack_resize(struct sljit_stack *stack, sljit_u8 *new_start) { -#if defined _WIN32 || defined(MADV_DONTNEED) +#if defined _WIN32 || defined(POSIX_MADV_DONTNEED) sljit_uw aligned_old_start; sljit_uw aligned_new_start; sljit_sw page_align; @@ -389,15 +312,19 @@ SLJIT_API_FUNC_ATTRIBUTE sljit_u8 *SLJIT_FUNC sljit_stack_resize(struct sljit_st return NULL; } } -#elif defined(MADV_DONTNEED) +#elif defined(POSIX_MADV_DONTNEED) if (stack->start < new_start) { page_align = get_page_alignment(); aligned_new_start = (sljit_uw)new_start & ~page_align; aligned_old_start = ((sljit_uw)stack->start) & ~page_align; - /* If madvise is available, we release the unnecessary space. */ - if (aligned_new_start > aligned_old_start) - madvise((void*)aligned_old_start, aligned_new_start - aligned_old_start, MADV_DONTNEED); + + if (aligned_new_start > aligned_old_start) { + posix_madvise((void*)aligned_old_start, aligned_new_start - aligned_old_start, POSIX_MADV_DONTNEED); +#ifdef MADV_FREE + madvise((void*)aligned_old_start, aligned_new_start - aligned_old_start, MADV_FREE); +#endif /* MADV_FREE */ + } } #endif /* _WIN32 */ |