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[2006-03-21 06:52 UTC] bspencer at plus dot net
Description: ------------ PHP Version 5.1.2 (debian unstable build) Operator version 0.3 The code linked to below causes a segfault when the operator extension is enabled. Note that it does not actually overload any operators, but it appears to be the .= that it dies on. Reducing the complexity of the code stops the segfault from occuring. Reproduce code: --------------- http://www.ztestbspencer40.plus.com/operator_test.php Actual result: -------------- GDB backtrace: #0 0xb7f0157d in _php_operator_binary_assign_op (execute_data=0xbf91c6cc, methodname=0xb7f03d56 "__assign_concat", methodname_len=15) at /tmp/tmp2aB13Z/operator-0.3/operator.c:278 #1 0x0829ad68 in execute () #2 0x0829b209 in execute () #3 0x0829ad68 in execute () #4 0x0829b209 in execute () #5 0x0829ad68 in execute () #6 0x0827eb3e in zend_execute_scripts () #7 0x0823e08e in php_execute_script () #8 0x0831d117 in main () (gdb) print object $1 = (zval *) 0x1c Line 278 of operator.c: if (!object || Z_TYPE_P(object) != IS_OBJECT) { PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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I am also getting a segfault with code similar to the following: class a { public $v; public function __assign_sl($val) { $this->v = $val; } } $bob = new a; $a->__assign_sl('lkj'); // works $a <<= 'lkj'; //segfault now, if I take out the $a->__assign_sl('lkj'); it works fine. It seems I just cannot mix using the overloaded operators and calling the functions directly. Also, it seems to be on a per file basis, so if I use $a->__assign_sl('lkj'); in one file and $a <<= 'lkj'; in another I don't seem to have problems even when they are in the same app. On a side note, I _LOVE_ the operator extension! Hands down it's one of the most useful for me.I have a patch against operator-0.3 (works against CVS too) which resolves the segfault: --BEGIN PATCH-- --- operator-0.3/operator.c 2006-02-08 00:34:17.000000000 +0000 +++ operator.c 2008-07-09 18:55:24.000000000 +0100 @@ -275,7 +275,7 @@ zval *object = php_operator_zval_ptr(&(opline->op1), &free_obj, execute_data TSRMLS_CC); zval *prop = php_operator_zval_ptr(&(opline->op2), &free_prop, execute_data TSRMLS_CC); - if (!object || Z_TYPE_P(object) != IS_OBJECT) { + if (!object || Z_TYPE_P(object) != IS_OBJECT || !prop) { /* Let orignal handler throw error */ return php_operator_original_opcode_handlers[PHP_OPERATOR_DECODE(op line)](ZEND_OPCODE_HANDLER_ARGS_PASSTHRU); } --END PATCH--