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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Who manages STRING_ARRAY/STRING_POINTER?","articleBody":"Who manages the char* set by Pointer.set_string_pointer? Is it impossible to set a string to a char* managed by a C++ object?\r\n\r\nTest Code 1:\r\n```python\r\nfrom memory import alloc\r\n\r\nstring = \"string1\"\r\nstring2 = \"string2\"\r\n\r\ns_p1 = alloc(4, False)\r\ns_p2 = alloc(4, False)\r\n\r\ns_p1.set_string_pointer(string)\r\ns_p2.set_string_pointer(string)\r\n\r\nprint(\"uint1\", s_p1.get_uint())\r\nprint(\"uint2\", s_p2.get_uint())\r\n\r\ns_p1.set_string_pointer(s_p2.get_string_pointer())\r\n\r\nprint(\"uint1\", s_p1.get_uint())\r\nprint(\"uint2\", s_p2.get_uint())\r\n\r\nprint(\"string1\", s_p1.get_string_pointer())\r\nprint(\"string2\", s_p2.get_string_pointer())\r\n\r\ns_p1.get_pointer().dealloc()\r\n```\r\nOutput 1:\r\n```\r\nuint1 3949688248\r\nuint2 3949688312\r\nuint1 3953894104\r\nuint2 3949688312\r\nstring1 12\r\nstring2 string2\r\nfree(): invalid pointer\r\n```\r\nFirst, I don't know why string1 is set to `12` instead of `string2` as in string2, but trying to free string1 would result in an illegal pointer deallocation. Who exactly is managing this char*?\r\n\r\nThere is also a problem with TypeManager.pointer_attribute not being able to set STRING_ARRAY.\r\n\r\nTest Code 2:\r\n```python\r\nfrom memory.manager import CustomType\r\nfrom memory.manager import Type\r\nfrom memory.manager import TypeManager\r\n\r\nmanager = TypeManager()\r\n\r\nclass Test(CustomType, metaclass=manager):\r\n    _size = 4\r\n    string = manager.pointer_attribute(Type.STRING_ARRAY, 0)\r\n\r\ntest = Test()\r\ntest.string = \"test\"\r\n```\r\nOutput 2:\r\n```\r\n[Source.Python]\r\n[SP] Caught an Exception:\r\nTraceback (most recent call last):\r\n  File \"../addons/source-python/packages/source-python/plugins/command.py\", line 164, in load_plugin\r\n    plugin = self.manager.load(plugin_name)\r\n  File \"../addons/source-python/packages/source-python/plugins/manager.py\", line 207, in load\r\n    plugin._load()\r\n  File \"../addons/source-python/packages/source-python/plugins/instance.py\", line 74, in _load\r\n    self.module = import_module(self.import_name)\r\n  File \"../addons/source-python/plugins/test/test.py\", line 4214, in \u003cmodule\u003e\r\n    test.string = \"test\"\r\n  File \"../addons/source-python/packages/source-python/memory/manager.py\", line 515, in fset\r\n    instance_ptr = alloc(TYPE_SIZES[type_name.upper()])\r\n\r\nKeyError: 'STRING_ARRAY'\r\n```\r\nSTRING_ARRAY also allows buffer overrun, and it seems that STRING-related issues are somewhat problematic.","author":{"url":"https://github.com/CookStar","@type":"Person","name":"CookStar"},"datePublished":"2023-05-17T16:22:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/472/Source.Python/issues/472"}