Revert "[lldb] Remove the global platform list"

It makes module dependencies loopier.

This reverts commits 49cffe3c7fab74252d4b6a073303c803dc1659f0 and
ffb9429b6f3c29ab4687b96fd85374924c98ad16.

1 files changed, 15 insertions, 5 deletions

diff --git a/lldb/source/API/SBDebugger.cpp b/lldb/source/API/SBDebugger.cpp
index 187b7a7..c3d1a98 100644
--- a/lldb/source/API/SBDebugger.cpp
+++ b/lldb/source/API/SBDebugger.cpp
@@ -1428,11 +1428,21 @@ SBError SBDebugger::SetCurrentPlatform(const char *platform_name_cstr) {
   SBError sb_error;
   if (m_opaque_sp) {
     if (platform_name_cstr && platform_name_cstr[0]) {
-      PlatformList &platforms = m_opaque_sp->GetPlatformList();
-      if (PlatformSP platform_sp = platforms.GetOrCreate(platform_name_cstr))
-        platforms.SetSelectedPlatform(platform_sp);
-      else
-        sb_error.ref().SetErrorString("platform not found");
+      ConstString platform_name(platform_name_cstr);
+      PlatformSP platform_sp(Platform::Find(platform_name));
+
+      if (platform_sp) {
+        // Already have a platform with this name, just select it
+        m_opaque_sp->GetPlatformList().SetSelectedPlatform(platform_sp);
+      } else {
+        // We don't have a platform by this name yet, create one
+        platform_sp = Platform::Create(platform_name, sb_error.ref());
+        if (platform_sp) {
+          // We created the platform, now append and select it
+          bool make_selected = true;
+          m_opaque_sp->GetPlatformList().Append(platform_sp, make_selected);
+        }
+      }
     } else {
       sb_error.ref().SetErrorString("invalid platform name");
     }