mirror of
https://github.com/alliedmodders/amxmodx.git
synced 2024-12-26 14:55:36 +03:00
d4de0e6f1e
I was über lazy at first, so took libs from SM. But actually it's quite easy to compile, so let's update to latest version \o/.
333 lines
9.0 KiB
C
333 lines
9.0 KiB
C
/*
|
|
* 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 <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 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 <pthread.h>
|
|
|
|
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 <sys/mman.h>
|
|
/* For detecting the page size. */
|
|
#include <unistd.h>
|
|
|
|
#ifndef MAP_ANON
|
|
|
|
#include <fcntl.h>
|
|
|
|
/* Some old systems does not have MAP_ANON. */
|
|
static sljit_si dev_zero = -1;
|
|
|
|
#if (defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED)
|
|
|
|
static SLJIT_INLINE sljit_si open_dev_zero(void)
|
|
{
|
|
dev_zero = open("/dev/zero", O_RDWR);
|
|
return dev_zero < 0;
|
|
}
|
|
|
|
#else /* SLJIT_SINGLE_THREADED */
|
|
|
|
#include <pthread.h>
|
|
|
|
static pthread_mutex_t dev_zero_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
static SLJIT_INLINE sljit_si open_dev_zero(void)
|
|
{
|
|
pthread_mutex_lock(&dev_zero_mutex);
|
|
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)
|
|
{
|
|
struct sljit_stack *stack;
|
|
union {
|
|
void *ptr;
|
|
sljit_uw uw;
|
|
} base;
|
|
#ifdef _WIN32
|
|
SYSTEM_INFO si;
|
|
#endif
|
|
|
|
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));
|
|
if (!stack)
|
|
return NULL;
|
|
|
|
#ifdef _WIN32
|
|
base.ptr = VirtualAlloc(NULL, max_limit, MEM_RESERVE, PAGE_READWRITE);
|
|
if (!base.ptr) {
|
|
SLJIT_FREE(stack);
|
|
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);
|
|
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);
|
|
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);
|
|
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)
|
|
{
|
|
#ifdef _WIN32
|
|
VirtualFree((void*)stack->base, 0, MEM_RELEASE);
|
|
#else
|
|
munmap((void*)stack->base, stack->max_limit - stack->base);
|
|
#endif
|
|
SLJIT_FREE(stack);
|
|
}
|
|
|
|
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
|