Open
Description
Bug Report
The following code leaks several hundred kilobytes with the latest libpython from the Ubuntu APT repository:
#include <Python.h>
int main(void) {
Py_Initialize();
Py_Finalize();
return 0;
}With libpython3.10, it consistently leaks 480 KB, whereas with libpython3.11, it consistently leaks 408 KB. (These are proper IEC power-of-10 kilobytes, not power-of-2 kibibytes.) I’ve verified this by running this code as a Clang-compiled dynamic executable through Valgrind.
Binary Images
libpython3.10 version:
linux-vdso.so.1 (0x0000ffffbf695000)
libpython3.10.so.1.0 => /lib/aarch64-linux-gnu/libpython3.10.so.1.0 (0x0000ffffbf050000)
libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000ffffbeea0000)
libexpat.so.1 => /lib/aarch64-linux-gnu/libexpat.so.1 (0x0000ffffbee60000)
libz.so.1 => /lib/aarch64-linux-gnu/libz.so.1 (0x0000ffffbee30000)
libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000ffffbed90000)
/lib/ld-linux-aarch64.so.1 (0x0000ffffbf65c000)
libpython3.11 version:
linux-vdso.so.1 (0x0000ffffaee59000)
libpython3.11.so.1.0 => /lib/aarch64-linux-gnu/libpython3.11.so.1.0 (0x0000ffffae650000)
libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000ffffae4a0000)
libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000ffffae400000)
libz.so.1 => /lib/aarch64-linux-gnu/libz.so.1 (0x0000ffffae3d0000)
libexpat.so.1 => /lib/aarch64-linux-gnu/libexpat.so.1 (0x0000ffffae390000)
/lib/ld-linux-aarch64.so.1 (0x0000ffffaee20000)
Valgrind Reports
Environment
- CPython versions tested on:
- libpython3.10
- libpython3.11
(Both from the Ubuntu APT repository)
- Operating system and architecture:
- Ubuntu 22.04.1 LTS
- AArch64
- Virtual machine on top of Apple’s Virtualization and Hypervisor frameworks
- macOS Ventura 13.2 (a) Beta (22D7750270d)
- MacBook Pro with M1 Max