https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117725
--- Comment #14 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Stefan Schulze Frielinghaus <stefa...@gcc.gnu.org>: https://gcc.gnu.org/g:1bd03564f29dc31e67e67efd93137d50fa7bb8a4 commit r15-6606-g1bd03564f29dc31e67e67efd93137d50fa7bb8a4 Author: Stefan Schulze Frielinghaus <stefa...@gcc.gnu.org> Date: Mon Jan 6 19:17:09 2025 +0100 Add type __sanitizer::ssize (#116957) Since the sanitizer merge in commit r15-5164-gfa321004f3f628 of GCC which entails LLVM commit 61a6439f35b6de28ff4aff4450d6fca970292fd5, GCCs bootstrap is broken on s390 -m31. This is due to commit ec68dc1ca4d967b599f1202855917d5ec9cae52f which introduces stricter type checking which is why GCC bootstrap fails with ``` In file included from /gcc/src/libsanitizer/interception/interception.h:18, from /gcc/src/libsanitizer/interception/interception_type_test.cpp:14: /gcc/src/libsanitizer/interception/interception_type_test.cpp:30:61: error: static assertion failed 30 | COMPILER_CHECK((__sanitizer::is_same<::SSIZE_T, ::ssize_t>::value)); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~ /gcc/src/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:363:44: note: in definition of macro 'COMPILER_CHECK' 363 | #define COMPILER_CHECK(pred) static_assert(pred, "") | ^~~~ make[8]: *** [Makefile:469: interception_type_test.lo] Error 1 ``` The culprit seems to be that we don't check for equality of type sizes anymore but rather whether the types are indeed the same. On s390 -m31 we have that `sizeof(int)==sizeof(long)` holds which is why previously the checks succeeded. They fail now because ``` size_t => unsigned long ssize_t => long ptrdiff_t => int ::SSIZE_T => __sanitizer::sptr => int ::PTRDIFF_T => __sanitizer::sptr => int ``` This is fixed by mapping `SSIZE_T` to `long` in the end. ``` typedef long ssize; typedef sptr ssize; ``` Cherry picked from LLVM commit ce44640fe29550461120d22b0358e6cac4aed822. libsanitizer/ChangeLog: PR sanitizer/117725 * interception/interception.h: Cherry picked from LLVM commit ce44640fe29550461120d22b0358e6cac4aed822. * sanitizer_common/sanitizer_internal_defs.h: Ditto.
