[Lldb-commits] [lldb] [lldb-dap] Test Gardening, improving DebugCommunication. (PR #141689)

[David Spickett via lldb-commits]

DavidSpickett wrote:

> The memory reference can have a corresponding source location. if there is debuginfo installed on the computer or it is downloaded with debuginfod.

Sounds like the failure we see:
```
FAIL: test_generic_evaluate_expressions (TestDAP_evaluate.TestDAP_evaluate)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/lldb/test/API/tools/lldb-dap/evaluate/TestDAP_evaluate.py", line 228, in test_generic_evaluate_expressions
    self.run_test_evaluate_expressions(enableAutoVariableSummaries=False)
  File "/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/lldb/test/API/tools/lldb-dap/evaluate/TestDAP_evaluate.py", line 117, in run_test_evaluate_expressions
    self.assertEvaluateFailure("list")  # local variable of a_function
  File "/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/lldb/test/API/tools/lldb-dap/evaluate/TestDAP_evaluate.py", line 22, in assertEvaluateFailure
    self.assertNotIn(
AssertionError: 'result' unexpectedly found in {'memoryReference': '0xFFFFF7CB3060', 'result': '0x0000000000000000', 'type': 'int *', 'variablesReference': 7}
Config=aarch64-/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/bin/clang
```
We have `libdebuginfod` installed:
```
# apt list --installed | grep debug

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

debugedit/now 1:5.0-4build1 arm64 [installed,local]
libdebuginfod-common/now 0.186-1build1 all [installed,local]
libdebuginfod1/now 0.186-1build1 arm64 [installed,local]
```
We don't have httplib installed though and don't see the URLs env var (https://documentation.ubuntu.com/server/explanation/debugging/about-debuginfod/index.html).

So we could be getting the location from a dev or debug info package from apt.

https://github.com/llvm/llvm-project/pull/141689