summaryrefslogtreecommitdiffstats
path: root/src/3rdparty/pcre2/src/sljit/sljitUtils.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/3rdparty/pcre2/src/sljit/sljitUtils.c')
-rw-r--r--src/3rdparty/pcre2/src/sljit/sljitUtils.c69
1 files changed, 33 insertions, 36 deletions
diff --git a/src/3rdparty/pcre2/src/sljit/sljitUtils.c b/src/3rdparty/pcre2/src/sljit/sljitUtils.c
index ec5c321194..9029db292c 100644
--- a/src/3rdparty/pcre2/src/sljit/sljitUtils.c
+++ b/src/3rdparty/pcre2/src/sljit/sljitUtils.c
@@ -1,7 +1,7 @@
/*
* Stack-less Just-In-Time compiler
*
- * Copyright 2009-2012 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
+ * 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:
@@ -206,10 +206,7 @@ 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;
+ void *ptr;
#ifdef _WIN32
SYSTEM_INFO si;
#endif
@@ -233,29 +230,29 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(slj
}
#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;
+ /* Align max_limit. */
+ max_limit = (max_limit + sljit_page_align) & ~sljit_page_align;
+
#ifdef _WIN32
- base.ptr = VirtualAlloc(NULL, max_limit, MEM_RESERVE, PAGE_READWRITE);
- if (!base.ptr) {
+ ptr = VirtualAlloc(NULL, max_limit, MEM_RESERVE, PAGE_READWRITE);
+ if (!ptr) {
SLJIT_FREE(stack, allocator_data);
return NULL;
}
- stack->base = base.uw;
+ stack->max_limit = (sljit_u8 *)ptr;
+ stack->base = stack->max_limit + max_limit;
stack->limit = stack->base;
- stack->max_limit = stack->base + max_limit;
- if (sljit_stack_resize(stack, stack->base + 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);
+ ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
#else
if (dev_zero < 0) {
if (open_dev_zero()) {
@@ -263,15 +260,15 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(slj
return NULL;
}
}
- base.ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE, dev_zero, 0);
+ ptr = mmap(NULL, max_limit, PROT_READ | PROT_WRITE, MAP_PRIVATE, dev_zero, 0);
#endif
- if (base.ptr == MAP_FAILED) {
+ if (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;
+ stack->max_limit = (sljit_u8 *)ptr;
+ stack->base = stack->max_limit + max_limit;
+ stack->limit = stack->base - limit;
#endif
stack->top = stack->base;
return stack;
@@ -279,53 +276,53 @@ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(slj
#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_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);
+ VirtualFree((void*)stack->max_limit, 0, MEM_RELEASE);
#else
- munmap((void*)stack->base, stack->max_limit - stack->base);
+ munmap((void*)stack->max_limit, stack->base - stack->max_limit);
#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_API_FUNC_ATTRIBUTE sljit_sw SLJIT_CALL sljit_stack_resize(struct sljit_stack *stack, sljit_u8 *new_limit)
{
sljit_uw aligned_old_limit;
sljit_uw aligned_new_limit;
- if ((new_limit > stack->max_limit) || (new_limit < stack->base))
+ 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;
+ 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_old_limit, aligned_new_limit - aligned_old_limit, MEM_COMMIT, PAGE_READWRITE))
+ 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;
}
else {
- if (!VirtualFree((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MEM_DECOMMIT))
+ if (!VirtualFree((void*)aligned_old_limit, aligned_new_limit - aligned_old_limit, MEM_DECOMMIT))
return -1;
}
}
stack->limit = new_limit;
return 0;
#else
- if (new_limit >= stack->limit) {
+ 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;
+ 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 defined(MADV_DONTNEED)
- if (aligned_new_limit < aligned_old_limit)
- madvise((void*)aligned_new_limit, aligned_old_limit - aligned_new_limit, MADV_DONTNEED);
+ if (aligned_new_limit > aligned_old_limit)
+ madvise((void*)aligned_old_limit, aligned_new_limit - aligned_old_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);
+ if (aligned_new_limit > aligned_old_limit)
+ posix_madvise((void*)aligned_old_limit, aligned_new_limit - aligned_old_limit, POSIX_MADV_DONTNEED);
#endif
stack->limit = new_limit;
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 22:03:33 +0000