https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88054
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
The problem looks very similar to:
3537 #if SANITIZER_INTERCEPT_REALPATH
3538 INTERCEPTOR(char *, realpath, const char *path, char *resolved_path) {
3539 void *ctx;
3540 COMMON_INTERCEPTOR_ENTER(ctx, realpath, path, resolved_path);
3541 if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path)
+ 1);
3542
3543 // Workaround a bug in glibc where dlsym(RTLD_NEXT, ...) returns the
oldest
3544 // version of a versioned symbol. For realpath(), this gives us
something
3545 // (called __old_realpath) that does not handle NULL in the second
argument.
3546 // Handle it as part of the interceptor.
3547 char *allocated_path = nullptr;
3548 if (!resolved_path)
3549 allocated_path = resolved_path = (char *)WRAP(malloc)(path_max +
1);
3550
3551 char *res = REAL(realpath)(path, resolved_path);
3552 if (allocated_path && !res) WRAP(free)(allocated_path);
3553 if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) +
1);
3554 return res;
3555 }
3556 #define INIT_REALPATH COMMON_INTERCEPT_FUNCTION(realpath);
3557 #else
3558 #define INIT_REALPATH
3559 #endif
