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Also remove the code that deals with file descriptors; we will now only start the backtracer for processes that have the get-task-allow entitlement, which means that they've been specifically signed for debugging, and *that* means that it is no longer critical to ensure that unexpectedly inherited fds are closed. rdar://137551812
What is this? ============= The libexec directory contains the source code for auxiliary executables that ship with the Swift runtime, as opposed to being part of the toolchain. On UNIX-like platforms, if the runtime is installed in /usr/lib/swift (for instance), these are things that you would expect to find in /usr/libexec/swift.