1 files changed, 49 insertions, 0 deletions
diff --git a/lldb/source/Expression/Expression.cpp b/lldb/source/Expression/Expression.cpp
index 93f585e..796851f 100644
--- a/lldb/source/Expression/Expression.cpp
+++ b/lldb/source/Expression/Expression.cpp
@@ -10,6 +10,11 @@
 #include "lldb/Target/ExecutionContextScope.h"
 #include "lldb/Target/Target.h"
 
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Error.h"
+
 using namespace lldb_private;
 
 Expression::Expression(Target &target)
@@ -26,3 +31,47 @@ Expression::Expression(ExecutionContextScope &exe_scope)
       m_jit_end_addr(LLDB_INVALID_ADDRESS) {
   assert(m_target_wp.lock());
 }
+
+llvm::Expected<FunctionCallLabel>
+lldb_private::FunctionCallLabel::fromString(llvm::StringRef label) {
+  llvm::SmallVector<llvm::StringRef, 4> components;
+  label.split(components, ":", /*MaxSplit=*/3);
+
+  if (components.size() != 4)
+    return llvm::createStringError("malformed function call label.");
+
+  if (components[0] != FunctionCallLabelPrefix)
+    return llvm::createStringError(llvm::formatv(
+        "expected function call label prefix '{0}' but found '{1}' instead.",
+        FunctionCallLabelPrefix, components[0]));
+
+  llvm::StringRef module_label = components[1];
+  llvm::StringRef die_label = components[2];
+
+  lldb::user_id_t module_id = 0;
+  if (!llvm::to_integer(module_label, module_id))
+    return llvm::createStringError(
+        llvm::formatv("failed to parse module ID from '{0}'.", module_label));
+
+  lldb::user_id_t die_id;
+  if (!llvm::to_integer(die_label, die_id))
+    return llvm::createStringError(
+        llvm::formatv("failed to parse symbol ID from '{0}'.", die_label));
+
+  return FunctionCallLabel{/*.module_id=*/module_id,
+                           /*.symbol_id=*/die_id,
+                           /*.lookup_name=*/components[3]};
+}
+
+std::string lldb_private::FunctionCallLabel::toString() const {
+  return llvm::formatv("{0}:{1:x}:{2:x}:{3}", FunctionCallLabelPrefix,
+                       module_id, symbol_id, lookup_name)
+      .str();
+}
+
+void llvm::format_provider<FunctionCallLabel>::format(
+    const FunctionCallLabel &label, raw_ostream &OS, StringRef Style) {
+  OS << llvm::formatv("FunctionCallLabel{ module_id: {0:x}, symbol_id: {1:x}, "
+                      "lookup_name: {2} }",
+                      label.module_id, label.symbol_id, label.lookup_name);
+}