This is a minimal reproducer for a crash where we would try to call
`DumpTypeDescription` on an incomplete type. This crash surfaced as part
of an NFC refactor of some of the logic in `GetCompleteQualType`:
```
(lldb) expr -l objc -- *(id)0x1234
Stack dump:
0. Program arguments: ./bin/lldb a.out -o "b main" -o run -o "expr -l objc -- *(id)0x1234"
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var LLVM_SYMBOLIZER_PATH to point to it):
0 lldb 0x0000000102ec768c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1 lldb 0x0000000102ec6010 llvm::sys::RunSignalHandlers() + 112
2 lldb 0x0000000102ec7fa8 SignalHandler(int) + 292
3 libsystem_platform.dylib 0x000000018c7a8c44 _sigtramp + 56
4 LLDB 0x0000000116b2030c lldb_private::TypeSystemClang::DumpTypeDescription(void*, lldb_private::Stream&, lldb::DescriptionLevel, lldb_private::ExecutionContextScope*) + 588
5 LLDB 0x00000001166b5124 lldb_private::CompilerType::DumpTypeDescription(lldb_private::Stream*, lldb::DescriptionLevel, lldb_private::ExecutionContextScope*) const + 228
6 LLDB 0x0000000116d4f08c IRForTarget::CreateResultVariable(llvm::Function&) + 2076
```
rdar://129633122
LLDB has three major testing strategies: unit tests, tests that exercise
the SB API though dotest.py and what we currently call lit tests. The
later is rather confusing as we're now using lit as the driver for all
three types of tests. As most of this grew organically, the directory
structure in the LLDB repository doesn't really make this clear.
The 'lit' tests are part of the root and among these tests there's a
Unit and Suite folder for the unit and dotest-tests. This layout makes
it impossible to run just the lit tests.
This patch changes the directory layout to match the 3 testing
strategies, each with their own directory and their own configuration
file. This means there are now 3 directories under lit with 3
corresponding targets:
- API (check-lldb-api): Test exercising the SB API.
- Shell (check-lldb-shell): Test exercising command line utilities.
- Unit (check-lldb-unit): Unit tests.
Finally, there's still the `check-lldb` target that runs all three test
suites.
Finally, this also renames the lit folder to `test` to match the LLVM
repository layout.
Differential revision: https://reviews.llvm.org/D68606
llvm-svn: 374184
