tree 66011ce406b11e8990a9cc4273e371b7230f18af
parent b520b0bd29525ff7b11e8705b9fe975bd0483c07
author Alfonso Gregory <gfunni234@gmail.com> 1627421586 +0000
committer Copybara-Service <copybara-worker@google.com> 1627595861 -0700

[libc] Fix strtok_r crash when src and *saveptr are both nullptr

While working and testing my refactoring of multiple string functions in libc, I came across a bug that needs to be addressed in a patch on its own: src is checked for nullptr and assigned to *saveptr if it is nullptr. However, saveptr is initially nullptr when it comes to reentry. This could cause a problem if both saveptr and src are null; we need to do the check first and return nullptr if both are nullptr.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D106885

GitOrigin-RevId: 0784e62c3c4a4aaabdf29f6fa0b5f8f7598a90d4