问题描述
https://github.com/python/cpython/blob/master/Include/objimpl.h#L83 说
PyObject_Realloc(p != NULL,0) 不返回NULL,也不释放p处的内存。
PyObject_Realloc 不会释放内存。
我注意到我的程序中存在内存泄漏,它不时使用 PyObject_Realloc。
我试图用这个修复它:
PyLongObject *new = (PyLongObject *) PyObject_Realloc(obj,new_size);
if (new == NULL) {
return PyErr_NoMemory();
}
if (new != obj) {
PyObject_Free(obj);
}
obj = new;
但现在我收到 malloc 错误 pointer being freed was not allocated
我打算如何确保我的程序在使用 PyObject_Malloc 和 PyObject_Realloc 时不会泄漏内存?
解决方法
您需要以与必须使用 realloc
完全相同的方式使用它:
PyObject *new = PyObject_Realloc(obj,new_size);
if (new == NULL) {
// obj is still valid - so maybe you need to free it *here*
PyObject_Free(obj);
return PyErr_NoMemory();
}
// if a non-null pointer *was* returned,then obj was already
// freed and new points to the new memory area. Therefore
// assign it to obj unconditionally.
obj = new;