[clang] [llvm] [Clang-Repl] Add support for out-of-process execution. (PR #110418)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-x64-windows-msvc` running on `windows-gcebot2` while building `clang` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/63/builds/2548

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/clang-windows.py ...' (failure)
...
[97/100] Linking CXX executable tools\clang\unittests\Tooling\ToolingTests.exe
[98/100] Running the Clang regression tests
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:57: note: using lit tools: C:\Program Files\Git\usr\bin
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using clang: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\clang.exe
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using ld.lld: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\ld.lld.exe
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using lld-link: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\lld-link.exe
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using ld64.lld: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\ld64.lld.exe
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using wasm-ld: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\wasm-ld.exe
-- Testing: 20993 tests, 32 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
FAIL: Clang :: Interpreter/out-of-process.cpp (20993 of 20993)
******************** TEST 'Clang :: Interpreter/out-of-process.cpp' FAILED ********************
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 3
cat C:\b\slave\clang-x64-windows-msvc\llvm-project\clang\test\Interpreter\out-of-process.cpp | c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\clang-repl.exe -oop-executor -orc-runtime | c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\filecheck.exe C:\b\slave\clang-x64-windows-msvc\llvm-project\clang\test\Interpreter\out-of-process.cpp
# executed command: cat 'C:\b\slave\clang-x64-windows-msvc\llvm-project\clang\test\Interpreter\out-of-process.cpp'
# .---command stdout------------
# | // REQUIRES: host-supports-jit
# | 
# | // RUN: cat %s | clang-repl -oop-executor -orc-runtime | FileCheck %s
# | 
# | extern "C" int printf(const char *, ...);
# | 
# | int intVar = 0;
# | double doubleVar = 3.14;
# | %undo
# | double doubleVar = 2.71;
# | 
# | auto r1 = printf("intVar = %d\n", intVar);
# | // CHECK: intVar = 0
# | auto r2 = printf("doubleVar = %.2f\n", doubleVar);
# | // CHECK: doubleVar = 2.71
# | 
# | // Test redefinition with inline and static functions.
# | int add(int a, int b, int c) { return a + b + c; }
# | %undo  // Revert to the initial version of add
# | inline int add(int a, int b) { return a + b; }
# | 
# | auto r3 = printf("add(1, 2) = %d\n", add(1, 2));
# | // CHECK-NEXT: add(1, 2) = 3
# | 
# | // Test inline and lambda functions with variations.
# | inline int square(int x) { return x * x; }
# | auto lambdaSquare = [](int x) { return x * x; };
# | auto lambdaMult = [](int a, int b) { return a * b; };
# | 
Step 8 (stage 1 check) failure: stage 1 check (failure)
...
[97/100] Linking CXX executable tools\clang\unittests\Tooling\ToolingTests.exe
[98/100] Running the Clang regression tests
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:57: note: using lit tools: C:\Program Files\Git\usr\bin
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using clang: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\clang.exe
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using ld.lld: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\ld.lld.exe
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using lld-link: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\lld-link.exe
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using ld64.lld: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\ld64.lld.exe
llvm-lit.py: C:\b\slave\clang-x64-windows-msvc\llvm-project\llvm\utils\lit\lit\llvm\config.py:506: note: using wasm-ld: c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\wasm-ld.exe
-- Testing: 20993 tests, 32 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
FAIL: Clang :: Interpreter/out-of-process.cpp (20993 of 20993)
******************** TEST 'Clang :: Interpreter/out-of-process.cpp' FAILED ********************
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 3
cat C:\b\slave\clang-x64-windows-msvc\llvm-project\clang\test\Interpreter\out-of-process.cpp | c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\clang-repl.exe -oop-executor -orc-runtime | c:\b\slave\clang-x64-windows-msvc\build\stage1\bin\filecheck.exe C:\b\slave\clang-x64-windows-msvc\llvm-project\clang\test\Interpreter\out-of-process.cpp
# executed command: cat 'C:\b\slave\clang-x64-windows-msvc\llvm-project\clang\test\Interpreter\out-of-process.cpp'
# .---command stdout------------
# | // REQUIRES: host-supports-jit
# | 
# | // RUN: cat %s | clang-repl -oop-executor -orc-runtime | FileCheck %s
# | 
# | extern "C" int printf(const char *, ...);
# | 
# | int intVar = 0;
# | double doubleVar = 3.14;
# | %undo
# | double doubleVar = 2.71;
# | 
# | auto r1 = printf("intVar = %d\n", intVar);
# | // CHECK: intVar = 0
# | auto r2 = printf("doubleVar = %.2f\n", doubleVar);
# | // CHECK: doubleVar = 2.71
# | 
# | // Test redefinition with inline and static functions.
# | int add(int a, int b, int c) { return a + b + c; }
# | %undo  // Revert to the initial version of add
# | inline int add(int a, int b) { return a + b; }
# | 
# | auto r3 = printf("add(1, 2) = %d\n", add(1, 2));
# | // CHECK-NEXT: add(1, 2) = 3
# | 
# | // Test inline and lambda functions with variations.
# | inline int square(int x) { return x * x; }
# | auto lambdaSquare = [](int x) { return x * x; };
# | auto lambdaMult = [](int a, int b) { return a * b; };
# | 

```

</details>

https://github.com/llvm/llvm-project/pull/110418