cmake: Add debugger

- Depends on cppdap and jsoncpp.
- Add --debugger argument to enable the Debugger.
- Add --debugger-pipe argument for DAP traffics over named pipes.
- Support breakpoints by filenames and line numbers.
- Support exception breakpoints.
- Call stack shows filenames and line numbers.
- Show Cache Variables.
- Show the state of currently defined targets,
  tests and directories with their properties.
- Add cmakeVersion to DAP initialize response.
- Include unit tests.

Co-authored-by: Ben McMorran <bemcmorr@microsoft.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/Source/cmDebuggerThreadManager.cxx b/Source/cmDebuggerThreadManager.cxx
new file mode 100644
index 0000000..0eb443b
--- /dev/null
+++ b/Source/cmDebuggerThreadManager.cxx
@@ -0,0 +1,47 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+
+#include "cmDebuggerThreadManager.h"
+
+#include <algorithm>
+
+#include <cm3p/cppdap/protocol.h>
+
+#include "cmDebuggerThread.h"
+
+namespace cmDebugger {
+
+std::atomic<int64_t> cmDebuggerThreadManager::NextThreadId(1);
+
+std::shared_ptr<cmDebuggerThread> cmDebuggerThreadManager::StartThread(
+  std::string const& name)
+{
+  std::shared_ptr<cmDebuggerThread> thread =
+    std::make_shared<cmDebuggerThread>(
+      cmDebuggerThreadManager::NextThreadId.fetch_add(1), name);
+  Threads.emplace_back(thread);
+  return thread;
+}
+
+void cmDebuggerThreadManager::EndThread(
+  std::shared_ptr<cmDebuggerThread> const& thread)
+{
+  Threads.remove(thread);
+}
+
+cm::optional<dap::StackTraceResponse>
+cmDebuggerThreadManager::GetThreadStackTraceResponse(int64_t id)
+{
+  auto it = find_if(Threads.begin(), Threads.end(),
+                    [&](const std::shared_ptr<cmDebuggerThread>& t) {
+                      return t->GetId() == id;
+                    });
+
+  if (it == Threads.end()) {
+    return {};
+  }
+
+  return GetStackTraceResponse(*it);
+}
+
+} // namespace cmDebugger