[lldb] add plugin names to process save-core error output. (#143126)

continuation of
[#142684](https://github.com/llvm/llvm-project/pull/142684) to show
plugin names.

From issue [#14258](https://github.com/llvm/llvm-project/issues/142581)

1 files changed, 23 insertions, 1 deletions

diff --git a/lldb/source/Commands/CommandObjectProcess.cpp b/lldb/source/Commands/CommandObjectProcess.cpp
index b1f243c..0a17442 100644
--- a/lldb/source/Commands/CommandObjectProcess.cpp
+++ b/lldb/source/Commands/CommandObjectProcess.cpp
@@ -1281,7 +1281,27 @@ public:
     ~CommandOptions() override = default;
 
     llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
-      return llvm::ArrayRef(g_process_save_core_options);
+      if (!m_opt_def.empty())
+        return llvm::ArrayRef(m_opt_def);
+
+      auto orig = llvm::ArrayRef(g_process_save_core_options);
+      m_opt_def.resize(orig.size());
+      llvm::copy(g_process_save_core_options, m_opt_def.data());
+      for (OptionDefinition &value : m_opt_def) {
+        llvm::StringRef opt_name = value.long_option;
+        if (opt_name != "plugin-name")
+          continue;
+
+        std::vector<llvm::StringRef> plugin_names =
+            PluginManager::GetSaveCorePluginNames();
+        m_plugin_enums.resize(plugin_names.size());
+        for (auto [num, val] : llvm::zip(plugin_names, m_plugin_enums)) {
+          val.string_value = num.data();
+        }
+        value.enum_values = llvm::ArrayRef(m_plugin_enums);
+        break;
+      }
+      return llvm::ArrayRef(m_opt_def);
     }
 
     Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
@@ -1312,6 +1332,8 @@ public:
 
     // Instance variables to hold the values for command options.
     SaveCoreOptions m_core_dump_options;
+    llvm::SmallVector<OptionEnumValueElement> m_plugin_enums;
+    std::vector<OptionDefinition> m_opt_def;
   };
 
 protected: