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Try to fix yield from GC issues

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Make sure we always update root and parent references before
releasing the old root object.

This fixes some crashes under aggressive cycle collection, so
hopefully this will also fix bug #75351.
This commit is contained in:
Nikita Popov 2018-01-12 22:48:29 +01:00
parent 420d11e8ca
commit cab0a814bd
1 changed files with 4 additions and 2 deletions
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6
Zend/zend_generators.c
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@ -179,10 +179,11 @@ static void zend_generator_dtor_storage(zend_object *object) /* {{{ */
zend_generator *root = generator->node.ptr.root, *next;
while (UNEXPECTED(root != generator)) {
next = zend_generator_get_child(&root->node, generator);
generator->node.ptr.root = next;
next->node.parent = NULL;
OBJ_RELEASE(&root->std);
root = next;
}
generator->node.parent = NULL;
}
if (EXPECTED(!ex) || EXPECTED(!(ex->func->op_array.fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK))
@ -664,11 +665,12 @@ ZEND_API zend_generator *zend_generator_update_current(zend_generator *generator
}
}
leaf->node.ptr.root = root;
if (old_root) {
OBJ_RELEASE(&old_root->std);
}
return leaf->node.ptr.root = root;
return root;
}
static int zend_generator_get_next_delegated_value(zend_generator *generator) /* {{{ */