php/archived-php-src
1
0
Fork 0
mirror of https://github.com/php/php-src.git synced 2026-03-24 08:12:21 +01:00
Code Issues Packages Projects Releases Wiki Activity

JIT: Fix register allocation

Browse Source 
Fixes oss-fuzz #45487
This commit is contained in:
Dmitry Stogov
2022-03-14 11:46:45 +03:00
parent 9792f0db76
commit e20f955e44
2 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
ext/opcache/jit/zend_jit_x86.dasc
View File

@@ -15982,6 +15982,7 @@ static zend_regset zend_jit_get_scratch_regset(const zend_op *opline, const zend
!(op2_info & ((MAY_BE_ANY|MAY_BE_REF|MAY_BE_UNDEF)-MAY_BE_LONG))) {
regset = ZEND_REGSET_EMPTY;
if (opline->op2_type == IS_CONST &&
opline->op1_type != IS_CONST &&
Z_TYPE_P(RT_CONSTANT(opline, opline->op2)) == IS_LONG &&
zend_long_is_power_of_two(Z_LVAL_P(RT_CONSTANT(opline, opline->op2))) &&
OP1_HAS_RANGE() &&

19
ext/opcache/tests/jit/reg_alloc_013.phpt Normal file
View File

@@ -0,0 +1,19 @@
--TEST--
Register Alloction 013: Division by zero
--INI--
opcache.enable=1
opcache.enable_cli=1
opcache.file_update_protection=0
opcache.jit_buffer_size=1M
--FILE--
<?php
function foo() {
$j++;
$j++ % $j -= $a % $a = $j;
}
foo();
?>
DONE
--EXPECTF--
Warning: Undefined variable $j in %sreg_alloc_013.php on line 3
DONE