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bf1cfc0753
Cf. <https://github.com/php/php-src/pull/10220#issuecomment-1383739816>. This reverts commit68ada76f9a. his reverts commit45384c6e20. This reverts commitef7fbfd710. This reverts commit9b9ea0d7c6. This reverts commitf15747c26b. This reverts commite883ba93c4. This reverts commit7e87551c37. This reverts commit921274d2b8. This reverts commitfc1f528e5e. This reverts commit0961715cda. This reverts commita93f264526. This reverts commit72dd94e1c6. This reverts commit29b2dc8964. This reverts commit05c7653bba. This reverts commit5190e5c260. This reverts commit6b55bf228c. This reverts commit184b4a12d3. This reverts commit4c31b7888a. This reverts commitd44e9680f0. This reverts commit4069a5c43f.
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Arnaud Le Blanc <arnaud.lb@gmail.com> |
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+----------------------------------------------------------------------+
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*/
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#ifndef ZEND_CALL_STACK_H
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#define ZEND_CALL_STACK_H
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#include "zend.h"
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#include "zend_portability.h"
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#ifdef __APPLE__
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# include <pthread.h>
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#endif
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#ifdef ZEND_CHECK_STACK_LIMIT
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typedef struct _zend_call_stack {
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void *base;
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size_t max_size;
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} zend_call_stack;
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ZEND_API void zend_call_stack_init(void);
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ZEND_API bool zend_call_stack_get(zend_call_stack *stack);
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/** Returns an approximation of the current stack position */
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static zend_always_inline void *zend_call_stack_position(void) {
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#ifdef ZEND_WIN32
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return _AddressOfReturnAddress();
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#elif PHP_HAVE_BUILTIN_FRAME_ADDRESS
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return __builtin_frame_address(0);
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#else
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void *a;
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void *pos = (void*)&a;
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return pos;
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#endif
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}
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static zend_always_inline bool zend_call_stack_overflowed(void *stack_limit) {
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return (uintptr_t) zend_call_stack_position() <= (uintptr_t) stack_limit;
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}
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static inline void* zend_call_stack_limit(void *base, size_t size, size_t reserved_size)
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{
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if (UNEXPECTED(size > (uintptr_t)base)) {
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return (void*)0;
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}
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base = (int8_t*)base - size;
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if (UNEXPECTED(UINTPTR_MAX - (uintptr_t)base < reserved_size)) {
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return (void*)UINTPTR_MAX;
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}
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return (int8_t*)base + reserved_size;
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}
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static inline size_t zend_call_stack_default_size(void)
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{
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#ifdef __linux__
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return 8 * 1024 * 1024;
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#endif
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#ifdef __FreeBSD__
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return 8 * 1024 * 1024;
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#endif
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#ifdef __APPLE__
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// https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/CreatingThreads/CreatingThreads.html
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if (pthread_main_np()) {
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return 8 * 1024 * 1024;
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}
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return 512 * 1024;
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#endif
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return 2 * 1024 * 1024;
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}
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#endif /* ZEND_CHECK_STACK_LIMIT */
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#endif /* ZEND_CALL_STACK_H */
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