mirror of
https://github.com/php/php-src.git
synced 2024-12-15 12:54:57 +08:00
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend Engine |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 2.00 of the Zend license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| http://www.zend.com/license/2_00.txt. |
|
|
| If you did not receive a copy of the Zend license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@zend.com so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: Arnaud Le Blanc <arnaud.lb@gmail.com> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
#ifndef ZEND_CALL_STACK_H
|
|
#define ZEND_CALL_STACK_H
|
|
|
|
#include "zend.h"
|
|
#include "zend_portability.h"
|
|
#ifdef __APPLE__
|
|
# include <pthread.h>
|
|
#endif
|
|
|
|
#ifdef ZEND_CHECK_STACK_LIMIT
|
|
|
|
typedef struct _zend_call_stack {
|
|
void *base;
|
|
size_t max_size;
|
|
} zend_call_stack;
|
|
|
|
ZEND_API void zend_call_stack_init(void);
|
|
|
|
ZEND_API bool zend_call_stack_get(zend_call_stack *stack);
|
|
|
|
/** Returns an approximation of the current stack position */
|
|
static zend_always_inline void *zend_call_stack_position(void) {
|
|
#ifdef ZEND_WIN32
|
|
return _AddressOfReturnAddress();
|
|
#elif PHP_HAVE_BUILTIN_FRAME_ADDRESS
|
|
return __builtin_frame_address(0);
|
|
#else
|
|
void *a;
|
|
void *pos = (void*)&a;
|
|
return pos;
|
|
#endif
|
|
}
|
|
|
|
static zend_always_inline bool zend_call_stack_overflowed(void *stack_limit) {
|
|
return (uintptr_t) zend_call_stack_position() <= (uintptr_t) stack_limit;
|
|
}
|
|
|
|
static inline void* zend_call_stack_limit(void *base, size_t size, size_t reserved_size)
|
|
{
|
|
if (UNEXPECTED(size > (uintptr_t)base)) {
|
|
return (void*)0;
|
|
}
|
|
|
|
base = (int8_t*)base - size;
|
|
|
|
if (UNEXPECTED(UINTPTR_MAX - (uintptr_t)base < reserved_size)) {
|
|
return (void*)UINTPTR_MAX;
|
|
}
|
|
|
|
return (int8_t*)base + reserved_size;
|
|
}
|
|
|
|
static inline size_t zend_call_stack_default_size(void)
|
|
{
|
|
#ifdef __linux__
|
|
return 8 * 1024 * 1024;
|
|
#endif
|
|
#if defined(__FreeBSD__) || defined(__NetBSD__)
|
|
return 4 * 1024 * 1024;
|
|
#endif
|
|
#if defined(__DragonFly__)
|
|
return 2 * 1024 * 1024;
|
|
#endif
|
|
#ifdef __OpenBSD__
|
|
return 512 * 1024;
|
|
#endif
|
|
#ifdef __APPLE__
|
|
// https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/CreatingThreads/CreatingThreads.html
|
|
if (pthread_main_np()) {
|
|
return 8 * 1024 * 1024;
|
|
}
|
|
return 512 * 1024;
|
|
#endif
|
|
#ifdef __HAIKU__
|
|
return 64 * 4096;
|
|
#endif
|
|
#ifdef __sun
|
|
return 8 * 4096;
|
|
#endif
|
|
|
|
return 2 * 1024 * 1024;
|
|
}
|
|
|
|
#endif /* ZEND_CHECK_STACK_LIMIT */
|
|
#endif /* ZEND_CALL_STACK_H */
|