intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 64 insertions, 0 deletions

diff --git a/contrib/tools/python3/src/Python/asdl.c b/contrib/tools/python3/src/Python/asdl.c
new file mode 100644
index 00000000000..c2110781181
--- /dev/null
+++ b/contrib/tools/python3/src/Python/asdl.c
@@ -0,0 +1,64 @@
+#include "Python.h"
+#include "asdl.h"
+
+asdl_seq *
+_Py_asdl_seq_new(Py_ssize_t size, PyArena *arena)
+{
+    asdl_seq *seq = NULL;
+    size_t n;
+
+    /* check size is sane */
+    if (size < 0 ||
+        (size && (((size_t)size - 1) > (SIZE_MAX / sizeof(void *))))) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+    n = (size ? (sizeof(void *) * (size - 1)) : 0);
+
+    /* check if size can be added safely */
+    if (n > SIZE_MAX - sizeof(asdl_seq)) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+    n += sizeof(asdl_seq);
+
+    seq = (asdl_seq *)PyArena_Malloc(arena, n);
+    if (!seq) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+    memset(seq, 0, n);
+    seq->size = size;
+    return seq;
+}
+
+asdl_int_seq *
+_Py_asdl_int_seq_new(Py_ssize_t size, PyArena *arena)
+{
+    asdl_int_seq *seq = NULL;
+    size_t n;
+
+    /* check size is sane */
+    if (size < 0 ||
+        (size && (((size_t)size - 1) > (SIZE_MAX / sizeof(void *))))) {
+            PyErr_NoMemory();
+            return NULL;
+    }
+    n = (size ? (sizeof(void *) * (size - 1)) : 0);
+
+    /* check if size can be added safely */
+    if (n > SIZE_MAX - sizeof(asdl_seq)) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+    n += sizeof(asdl_seq);
+
+    seq = (asdl_int_seq *)PyArena_Malloc(arena, n);
+    if (!seq) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+    memset(seq, 0, n);
+    seq->size = size;
+    return seq;
+}