diff options
Diffstat (limited to 'pcre/sljit/sljitUtils.c')
-rw-r--r-- | pcre/sljit/sljitUtils.c | 103 |
1 files changed, 51 insertions, 52 deletions
diff --git a/pcre/sljit/sljitUtils.c b/pcre/sljit/sljitUtils.c index 9029db292c0..5c2a8389328 100644 --- a/pcre/sljit/sljitUtils.c +++ b/pcre/sljit/sljitUtils.c @@ -48,12 +48,12 @@ static SLJIT_INLINE void allocator_release_lock(void) #if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK) -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void) +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_grab_lock(void) { /* Always successful. */ } -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_release_lock(void) { /* Always successful. */ } @@ -88,7 +88,7 @@ static SLJIT_INLINE void allocator_release_lock(void) static HANDLE global_mutex = 0; -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void) +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) @@ -97,7 +97,7 @@ SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void) WaitForSingleObject(global_mutex, INFINITE); } -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_release_lock(void) { ReleaseMutex(global_mutex); } @@ -130,12 +130,12 @@ static SLJIT_INLINE void allocator_release_lock(void) static pthread_mutex_t global_mutex = PTHREAD_MUTEX_INITIALIZER; -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void) +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_grab_lock(void) { pthread_mutex_lock(&global_mutex); } -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void) +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_release_lock(void) { pthread_mutex_unlock(&global_mutex); } @@ -203,7 +203,7 @@ static SLJIT_INLINE sljit_s32 open_dev_zero(void) /* 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) +SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_FUNC sljit_allocate_stack(sljit_uw start_size, sljit_uw max_size, void *allocator_data) { struct sljit_stack *stack; void *ptr; @@ -212,7 +212,7 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(slj #endif SLJIT_UNUSED_ARG(allocator_data); - if (limit > max_limit || limit < 1) + if (start_size > max_size || start_size < 1) return NULL; #ifdef _WIN32 @@ -234,25 +234,27 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(slj if (!stack) return NULL; - /* Align max_limit. */ - max_limit = (max_limit + sljit_page_align) & ~sljit_page_align; + /* Align max_size. */ + max_size = (max_size + sljit_page_align) & ~sljit_page_align; #ifdef _WIN32 - ptr = VirtualAlloc(NULL, max_limit, MEM_RESERVE, PAGE_READWRITE); + ptr = VirtualAlloc(NULL, max_size, MEM_RESERVE, PAGE_READWRITE); if (!ptr) { SLJIT_FREE(stack, allocator_data); return NULL; } - stack->max_limit = (sljit_u8 *)ptr; - stack->base = stack->max_limit + max_limit; - stack->limit = stack->base; - if (sljit_stack_resize(stack, stack->base - limit)) { + + stack->min_start = (sljit_u8 *)ptr; + stack->end = stack->min_start + max_size; + stack->start = stack->end; + + if (sljit_stack_resize(stack, stack->end - start_size) == NULL) { sljit_free_stack(stack, allocator_data); return NULL; } #else #ifdef MAP_ANON - ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); + ptr = mmap(NULL, max_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); #else if (dev_zero < 0) { if (open_dev_zero()) { @@ -260,73 +262,70 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(slj return NULL; } } - ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE, dev_zero, 0); + ptr = mmap(NULL, max_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, dev_zero, 0); #endif if (ptr == MAP_FAILED) { SLJIT_FREE(stack, allocator_data); return NULL; } - stack->max_limit = (sljit_u8 *)ptr; - stack->base = stack->max_limit + max_limit; - stack->limit = stack->base - limit; + stack->min_start = (sljit_u8 *)ptr; + stack->end = stack->min_start + max_size; + stack->start = stack->end - start_size; #endif - stack->top = stack->base; + stack->top = stack->end; return stack; } #undef PAGE_ALIGN -SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack *stack, void *allocator_data) +SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_free_stack(struct sljit_stack *stack, void *allocator_data) { SLJIT_UNUSED_ARG(allocator_data); #ifdef _WIN32 - VirtualFree((void*)stack->max_limit, 0, MEM_RELEASE); + VirtualFree((void*)stack->min_start, 0, MEM_RELEASE); #else - munmap((void*)stack->max_limit, stack->base - stack->max_limit); + munmap((void*)stack->min_start, stack->end - stack->min_start); #endif SLJIT_FREE(stack, allocator_data); } -SLJIT_API_FUNC_ATTRIBUTE sljit_sw SLJIT_CALL sljit_stack_resize(struct sljit_stack *stack, sljit_u8 *new_limit) +SLJIT_API_FUNC_ATTRIBUTE sljit_u8 *SLJIT_FUNC sljit_stack_resize(struct sljit_stack *stack, sljit_u8 *new_start) { - sljit_uw aligned_old_limit; - sljit_uw aligned_new_limit; + sljit_uw aligned_old_start; + sljit_uw aligned_new_start; + + if ((new_start < stack->min_start) || (new_start >= stack->end)) + return NULL; - if ((new_limit < stack->max_limit) || (new_limit >= stack->base)) - return -1; #ifdef _WIN32 - aligned_new_limit = (sljit_uw)new_limit & ~sljit_page_align; - aligned_old_limit = ((sljit_uw)stack->limit) & ~sljit_page_align; - if (aligned_new_limit != aligned_old_limit) { - if (aligned_new_limit < aligned_old_limit) { - if (!VirtualAlloc((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MEM_COMMIT, PAGE_READWRITE)) - return -1; + aligned_new_start = (sljit_uw)new_start & ~sljit_page_align; + aligned_old_start = ((sljit_uw)stack->start) & ~sljit_page_align; + if (aligned_new_start != aligned_old_start) { + if (aligned_new_start < aligned_old_start) { + if (!VirtualAlloc((void*)aligned_new_start, aligned_old_start - aligned_new_start, MEM_COMMIT, PAGE_READWRITE)) + return NULL; } else { - if (!VirtualFree((void*)aligned_old_limit, aligned_new_limit - aligned_old_limit, MEM_DECOMMIT)) - return -1; + if (!VirtualFree((void*)aligned_old_start, aligned_new_start - aligned_old_start, MEM_DECOMMIT)) + return NULL; } } - stack->limit = new_limit; - return 0; #else - if (new_limit <= stack->limit) { - stack->limit = new_limit; - return 0; - } - aligned_new_limit = (sljit_uw)new_limit & ~sljit_page_align; - aligned_old_limit = ((sljit_uw)stack->limit) & ~sljit_page_align; - /* If madvise is available, we release the unnecessary space. */ + if (stack->start < new_start) { + aligned_new_start = (sljit_uw)new_start & ~sljit_page_align; + aligned_old_start = ((sljit_uw)stack->start) & ~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_old_limit, aligned_new_limit - aligned_old_limit, MADV_DONTNEED); + if (aligned_new_start > aligned_old_start) + madvise((void*)aligned_old_start, aligned_new_start - aligned_old_start, MADV_DONTNEED); #elif defined(POSIX_MADV_DONTNEED) - if (aligned_new_limit > aligned_old_limit) - posix_madvise((void*)aligned_old_limit, aligned_new_limit - aligned_old_limit, POSIX_MADV_DONTNEED); + if (aligned_new_start > aligned_old_start) + posix_madvise((void*)aligned_old_start, aligned_new_start - aligned_old_start, POSIX_MADV_DONTNEED); #endif - stack->limit = new_limit; - return 0; + } #endif + stack->start = new_start; + return new_start; } #endif /* SLJIT_UTIL_STACK */ |