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[sanitizer_common] Define wordexp_wrde_dooffs for Solaris

Authored by ro on Sep 3 2021, 1:02 AM.

Description

[sanitizer_common] Define wordexp_wrde_dooffs for Solaris

The Solaris buildbots have been broken for some time:

In file included from /opt/llvm-buildbot/home/solaris11-amd64/clang-solaris11-amd64/llvm/compiler-rt/lib/asan/asan_interceptors.cpp:174:
/opt/llvm-buildbot/home/solaris11-amd64/clang-solaris11-amd64/llvm/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:4000:19: error: use of undeclared identifier 'wordexp_wrde_dooffs'
        ((flags & wordexp_wrde_dooffs) ? p->we_offs : 0) + p->we_wordc;
                  ^

This was caused by D108646 https://reviews.llvm.org/D108646; the fix is
equivalent to D108838 https://reviews.llvm.org/D108838.

Tested on amd64-pc-solaris2.11 and sparcv9-sun-solaris2.11.

Differential Revision: https://reviews.llvm.org/D109193