Merge pull request llvm#9451 from felipepiovezan/felipe/cherry_pick_language_api

[cherry-pick][lldb] Introduce Language::AreEquivalentFunctions (llvm#112720)

Author: felipepiovezan

lldb/include/lldb/Target/Language.h

@@ -365,6 +365,15 @@ class Language : public PluginInterface {
     return false;
   }
 
+  /// Returns a boolean indicating whether two symbol contexts are equal for the
+  /// purposes of frame comparison. If the plugin has no opinion, it should
+  /// return nullopt.
+  virtual std::optional<bool>
+  AreEqualForFrameComparison(const SymbolContext &sc1,
+                             const SymbolContext &sc2) const {
+    return {};
+  }
+
   /// Returns true if this Language supports exception breakpoints on throw via
   /// a corresponding LanguageRuntime plugin.
   virtual bool SupportsExceptionBreakpointsOnThrow() const { return false; }

lldb/source/Target/ThreadPlanStepOverRange.cpp

@@ -11,6 +11,7 @@
 #include "lldb/Symbol/CompileUnit.h"
 #include "lldb/Symbol/Function.h"
 #include "lldb/Symbol/LineTable.h"
+#include "lldb/Target/Language.h"
 #include "lldb/Target/Process.h"
 #include "lldb/Target/RegisterContext.h"
 #include "lldb/Target/Target.h"
@@ -101,6 +102,10 @@ void ThreadPlanStepOverRange::SetupAvoidNoDebug(
 
 bool ThreadPlanStepOverRange::IsEquivalentContext(
     const SymbolContext &context) {
+  if (Language *language = Language::FindPlugin(context.GetLanguage()))
+    if (std::optional<bool> maybe_equivalent =
+            language->AreEqualForFrameComparison(context, m_addr_context))
+      return *maybe_equivalent;
   // Match as much as is specified in the m_addr_context: This is a fairly
   // loose sanity check.  Note, sometimes the target doesn't get filled in so I
   // left out the target check.  And sometimes the module comes in as the .o