[lldb] Add OS plugin property for reporting all threads (#123145)

Currently, an LLDB target option controls whether plugins report all
threads. However, it seems natural for this knowledge could come from
the plugin itself. To support this, this commits adds a virtual method
to the plugin base class, making the Python OS query the target option
to preserve existing behavior.

2 files changed, 10 insertions, 0 deletions

diff --git a/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp b/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp
index 3848a2b..aff5218 100644
--- a/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp
+++ b/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp
@@ -386,4 +386,12 @@ lldb::ThreadSP OperatingSystemPython::CreateThread(lldb::tid_t tid,
   return ThreadSP();
 }
 
+bool OperatingSystemPython::DoesPluginReportAllThreads() {
+  // If the python plugin has a "DoesPluginReportAllThreads" method, use it.
+  if (std::optional<bool> plugin_answer =
+          m_operating_system_interface_sp->DoesPluginReportAllThreads())
+    return *plugin_answer;
+  return m_process->GetOSPluginReportsAllThreads();
+}
+
 #endif // #if LLDB_ENABLE_PYTHON
diff --git a/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.h b/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.h
index 90973ac..980a544 100644
--- a/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.h
+++ b/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.h
@@ -60,6 +60,8 @@ public:
   // Method for lazy creation of threads on demand
   lldb::ThreadSP CreateThread(lldb::tid_t tid, lldb::addr_t context) override;
 
+  bool DoesPluginReportAllThreads() override;
+
 protected:
   bool IsValid() const {
     return m_script_object_sp && m_script_object_sp->IsValid();