[all-commits] [llvm/llvm-project] 1e05d7: Remap the target (Xcode) SDK directory to the host...

[adrian-prantl via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 1e05d7b3d3c6d29ff6f9493cc478a36244cc32bd
      https://github.com/llvm/llvm-project/commit/1e05d7b3d3c6d29ff6f9493cc478a36244cc32bd
  Author: Adrian Prantl <aprantl at apple.com>
  Date:   2020-04-06 (Mon, 06 Apr 2020)

  Changed paths:
    M lldb/include/lldb/Core/Module.h
    M lldb/include/lldb/Host/HostInfoBase.h
    M lldb/include/lldb/Host/macosx/HostInfoMacOSX.h
    M lldb/include/lldb/Target/Platform.h
    A lldb/include/lldb/Utility/XcodeSDK.h
    M lldb/source/Core/Module.cpp
    M lldb/source/Host/macosx/objcxx/HostInfoMacOSX.mm
    M lldb/source/Plugins/Platform/MacOSX/PlatformAppleTVSimulator.h
    M lldb/source/Plugins/Platform/MacOSX/PlatformAppleWatchSimulator.h
    M lldb/source/Plugins/Platform/MacOSX/PlatformDarwin.cpp
    M lldb/source/Plugins/Platform/MacOSX/PlatformDarwin.h
    M lldb/source/Plugins/Platform/MacOSX/PlatformMacOSX.cpp
    M lldb/source/Plugins/Platform/MacOSX/PlatformMacOSX.h
    M lldb/source/Plugins/Platform/MacOSX/PlatformRemoteDarwinDevice.h
    M lldb/source/Plugins/Platform/MacOSX/PlatformiOSSimulator.h
    M lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
    M lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
    M lldb/source/Utility/CMakeLists.txt
    A lldb/source/Utility/XcodeSDK.cpp
    M lldb/unittests/Platform/PlatformDarwinTest.cpp
    M lldb/unittests/Utility/CMakeLists.txt
    A lldb/unittests/Utility/XcodeSDKTest.cpp

  Log Message:
  -----------
  Remap the target (Xcode) SDK directory to the host SDK directory.

This is mostly useful for Swift support; it allows LLDB to substitute
a matching SDK it shipped with instead of the sysroot path that was
used at compile time.

The goal of this is to make the Xcode SDK something that behaves more
like the compiler's resource directory, as in that it ships with LLDB
rather than with the debugged program. This important primarily for
importing Swift and Clang modules in the expression evaluator, and
getting at the APINotes from the SDK in Swift.

For a cross-debugging scenario, this means you have to have an SDK for
your target installed alongside LLDB. In Xcode this will always be the
case.

rdar://problem/60640017

Differential Revision: https://reviews.llvm.org/D76471