[lldb] [llvm] [lldb-dap] Add multi-session support with shared debugger instances (PR #163653)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `cross-project-tests-sie-ubuntu-dwarf5` running on `doug-worker-1b` while building `lldb,llvm` at step 6 "test-build-unified-tree-check-cross-project".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/163/builds/30578

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

```
Step 6 (test-build-unified-tree-check-cross-project) failure: test (failure)
******************** TEST 'cross-project-tests :: debuginfo-tests/dexter-tests/dbg-arg.c' FAILED ********************
Exit Code: 2

Command Output (stdout):
--
dbg-arg.c: nan/nan (nan) [Command '['/usr/bin/python3.10', '/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/dex/../dexter.py', 'run-debugger-internal-', '/tmp/lit-tmp-j2zr83xm/dexter/tmph6sxnouz/tmpsqn9ypvq', '--working-directory=/tmp/lit-tmp-j2zr83xm/dexter/tmph6sxnouz', '--unittest=off', '--indent-timer-level=3']' returned non-zero exit status 1.]
Command '['/usr/bin/python3.10', '/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/dex/../dexter.py', 'run-debugger-internal-', '/tmp/lit-tmp-j2zr83xm/dexter/tmph6sxnouz/tmpsqn9ypvq', '--working-directory=/tmp/lit-tmp-j2zr83xm/dexter/tmph6sxnouz', '--unittest=off', '--indent-timer-level=3']' returned non-zero exit status 1.
--
Command Output (stderr):
--
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/bin/clang -std=gnu11 -m64 -mllvm -fast-isel=false -g /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter-tests/dbg-arg.c -o /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/projects/cross-project-tests/debuginfo-tests/dexter-tests/Output/dbg-arg.c.tmp # RUN: at line 5
+ /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/bin/clang -std=gnu11 -m64 -mllvm -fast-isel=false -g /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter-tests/dbg-arg.c -o /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/projects/cross-project-tests/debuginfo-tests/dexter-tests/Output/dbg-arg.c.tmp
"/usr/bin/python3.10" "/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/dexter.py" test -v --fail-lt 1.0 -w      --binary /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/projects/cross-project-tests/debuginfo-tests/dexter-tests/Output/dbg-arg.c.tmp --lldb-executable "/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/bin/lldb-dap" --debugger lldb-dap --dap-message-log=-e -- /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter-tests/dbg-arg.c # RUN: at line 6
+ /usr/bin/python3.10 /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter/dexter.py test -v --fail-lt 1.0 -w --binary /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/projects/cross-project-tests/debuginfo-tests/dexter-tests/Output/dbg-arg.c.tmp --lldb-executable /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/bin/lldb-dap --debugger lldb-dap --dap-message-log=-e -- /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/llvm-project/cross-project-tests/debuginfo-tests/dexter-tests/dbg-arg.c
note: Opening DAP server: /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu-dwarf5/build/bin/lldb-dap
-> {
  "type": "request",
  "command": "initialize",
  "arguments": {
    "clientID": "dexter",
    "adapterID": "lldb-dap",
    "pathFormat": "path",
    "linesStartAt1": true,
    "columnsStartAt1": true,
    "supportsVariableType": true,
    "supportsVariablePaging": true,
    "supportsRunInTerminalRequest": false
  },
  "seq": 1
}
<- {
  "body": {
    "$__lldb_version": "lldb version 22.0.0git (https://github.com/llvm/llvm-project.git revision 5ab3375b2cf461ab02704d129a1f4d5ba1a1e275)\n  clang revision 5ab3375b2cf461ab02704d129a1f4d5ba1a1e275\n  llvm revision 5ab3375b2cf461ab02704d129a1f4d5ba1a1e275",
    "completionTriggerCharacters": [
      ".",
      " ",
      "\t"
    ],
    "exceptionBreakpointFilters": [
      {
        "description": "C++ Catch",
        "filter": "cpp_catch",
        "label": "C++ Catch",
        "supportsCondition": true
      },
      {
        "description": "C++ Throw",
        "filter": "cpp_throw",
        "label": "C++ Throw",
        "supportsCondition": true
...

```

</details>

https://github.com/llvm/llvm-project/pull/163653