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It's possible to start a program with one (or all) of the standard file descriptors closed. Subsequent open system calls will give the program a low-numbered file descriptor. This is problematic because we may believe we are writing to standard out instead of a file. Introduce Process::FixupStandardFileDescriptors, a helper function to remap standard file descriptors to /dev/null if they were closed before the program started. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219170 91177308-0d34-0410-b5e6-96231b3b80d8
Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for the Low Level Virtual Machine, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you're writing a package for LLVM, see docs/Packaging.rst for our suggestions.