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6173a9a109
The aim of this PR is twofold:
- Reduce the number of highly similar TMP|VAR handlers
- Avoid ZVAL_DEREF in most of these cases
This is achieved by guaranteeing that all zend_compile_expr() calls, as well as
all other compile calls with BP_VAR_{R,IS}, will result in a TMP variable. This
implies that the result will not contain an IS_INDIRECT or IS_REFERENCE value,
which was mostly already the case, with two exceptions:
- Calls to return-by-reference functions. Because return-by-reference functions
are quite rare, this is solved by delegating the DEREF to the RETURN_BY_REF
handler, which will examine the stack to check whether the caller expects a
VAR or TMP to understand whether the DEREF is needed. Internal functions will
also need to adjust by calling the zend_return_unwrap_ref() function.
- By-reference assignments, including both $a = &$b, as well as $a = [&$b]. When
the result of these expressions is used in a BP_VAR_R context, the reference
is unwrapped via a ZEND_QM_ASSIGN opcode beforehand. This is exceptionally
rare.
Closes GH-20628
72 lines
2.2 KiB
PHP
72 lines
2.2 KiB
PHP
--TEST--
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Stack limit 015 - Internal stack limit check in zend_compile_var()
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--CREDITS--
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abdullahasif88
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--SKIPIF--
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<?php
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if (!function_exists('zend_test_zend_call_stack_get')) die("skip zend_test_zend_call_stack_get() is not available");
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?>
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--EXTENSIONS--
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zend_test
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--INI--
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zend.max_allowed_stack_size=64K
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--FILE--
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<?php
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$test
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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->p->p->p->p->p->p->p->p->p->p
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;
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?>
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--EXPECTF--
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Fatal error: Maximum call stack size of %d bytes (zend.max_allowed_stack_size - zend.reserved_stack_size) reached during compilation. Try splitting expression in %s on line %d
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