From dc5ecf919a9ed33426d7bd9fcbec01d4918ed925 Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Sun, 4 Aug 2024 14:38:15 -0400
Subject: [PATCH] Delete tests/memdbg.py (#1334)

It is unused, it's unclear if it even works or how one would use it
---
 tests/memdbg.py | 89 -------------------------------------------------
 1 file changed, 89 deletions(-)
 delete mode 100644 tests/memdbg.py

diff --git a/tests/memdbg.py b/tests/memdbg.py
deleted file mode 100644
index 5eed1ba8b..000000000
--- a/tests/memdbg.py
+++ /dev/null
@@ -1,89 +0,0 @@
-import sys
-import traceback
-
-from cffi import api as _api
-
-sys.modules["ssl"] = None
-sys.modules["_hashlib"] = None
-
-
-_ffi = _api.FFI()
-_ffi.cdef(
-    """
-    void *malloc(size_t size);
-    void free(void *ptr);
-    void *realloc(void *ptr, size_t size);
-
-    int  CRYPTO_set_mem_functions(
-        void *(*m)(size_t),void *(*r)(void *,size_t), void (*f)(void *));
-
-    int backtrace(void **buffer, int size);
-    char **backtrace_symbols(void *const *buffer, int size);
-    void backtrace_symbols_fd(void *const *buffer, int size, int fd);
-    """
-)
-_api = _ffi.verify(
-    """
-    #include <openssl/crypto.h>
-    #include <stdlib.h>
-    #include <execinfo.h>
-    """,
-    libraries=["crypto"],
-)
-C = _ffi.dlopen(None)
-
-verbose = False
-
-
-def log(s):
-    if verbose:
-        print(s)
-
-
-def _backtrace():
-    buf = _ffi.new("void*[]", 64)
-    result = _api.backtrace(buf, len(buf))
-    strings = _api.backtrace_symbols(buf, result)
-    stack = [_ffi.string(strings[i]) for i in range(result)]
-    C.free(strings)
-    return stack
-
-
-@_ffi.callback("void*(*)(size_t)")
-def malloc(n):
-    memory = C.malloc(n)
-    python_stack = traceback.extract_stack(limit=3)
-    c_stack = _backtrace()
-    heap[memory] = [(n, python_stack, c_stack)]
-    log("malloc(%d) -> %s" % (n, memory))
-    return memory
-
-
-@_ffi.callback("void*(*)(void*, size_t)")
-def realloc(p, n):
-    memory = C.realloc(p, n)
-    old = heap.pop(p)
-
-    python_stack = traceback.extract_stack(limit=3)
-    c_stack = _backtrace()
-
-    old.append((n, python_stack, c_stack))
-    heap[memory] = old
-    log("realloc(0x%x, %d) -> %s" % (int(_ffi.cast("int", p)), n, memory))
-    return memory
-
-
-@_ffi.callback("void(*)(void*)")
-def free(p):
-    if p != _ffi.NULL:
-        C.free(p)
-        del heap[p]
-        log("free(0x{:x})".format(int(_ffi.cast("int", p))))
-
-
-if _api.CRYPTO_set_mem_functions(malloc, realloc, free):
-    log("Enabled memory debugging")
-    heap = {}
-else:
-    log("Failed to enable memory debugging")
-    heap = None