2 files changed, 102 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/Trace/common/ThreadPostMortemTrace.cpp b/contrib/llvm-project/lldb/source/Plugins/Trace/common/ThreadPostMortemTrace.cpp
new file mode 100644
index 000000000000..564a52eaaf82
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/Trace/common/ThreadPostMortemTrace.cpp
@@ -0,0 +1,43 @@
+//===-- ThreadPostMortemTrace.cpp -----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "ThreadPostMortemTrace.h"
+
+#include <memory>
+#include <optional>
+
+#include "Plugins/Process/Utility/RegisterContextHistory.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace llvm;
+
+void ThreadPostMortemTrace::RefreshStateAfterStop() {}
+
+RegisterContextSP ThreadPostMortemTrace::GetRegisterContext() {
+  if (!m_reg_context_sp)
+    m_reg_context_sp = CreateRegisterContextForFrame(nullptr);
+
+  return m_reg_context_sp;
+}
+
+RegisterContextSP
+ThreadPostMortemTrace::CreateRegisterContextForFrame(StackFrame *frame) {
+  // Eventually this will calculate the register context based on the current
+  // trace position.
+  return std::make_shared<RegisterContextHistory>(
+      *this, 0, GetProcess()->GetAddressByteSize(), LLDB_INVALID_ADDRESS);
+}
+
+bool ThreadPostMortemTrace::CalculateStopInfo() { return false; }
+
+const std::optional<FileSpec> &ThreadPostMortemTrace::GetTraceFile() const {
+  return m_trace_file;
+}
diff --git a/contrib/llvm-project/lldb/source/Plugins/Trace/common/ThreadPostMortemTrace.h b/contrib/llvm-project/lldb/source/Plugins/Trace/common/ThreadPostMortemTrace.h
new file mode 100644
index 000000000000..39f53fe09f88
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/Trace/common/ThreadPostMortemTrace.h
@@ -0,0 +1,59 @@
+//===-- ThreadPostMortemTrace.h ---------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_TARGET_THREADPOSTMORTEMTRACE_H
+#define LLDB_TARGET_THREADPOSTMORTEMTRACE_H
+
+#include "lldb/Target/Thread.h"
+#include <optional>
+
+namespace lldb_private {
+
+/// \class ThreadPostMortemTrace ThreadPostMortemTrace.h
+///
+/// Thread implementation used for representing threads gotten from trace
+/// session files, which are similar to threads from core files.
+///
+class ThreadPostMortemTrace : public Thread {
+public:
+  /// \param[in] process
+  ///     The process who owns this thread.
+  ///
+  /// \param[in] tid
+  ///     The tid of this thread.
+  ///
+  /// \param[in] trace_file
+  ///     The file that contains the list of instructions that were traced when
+  ///     this thread was being executed.
+  ThreadPostMortemTrace(Process &process, lldb::tid_t tid,
+                        const std::optional<FileSpec> &trace_file)
+      : Thread(process, tid), m_trace_file(trace_file) {}
+
+  void RefreshStateAfterStop() override;
+
+  lldb::RegisterContextSP GetRegisterContext() override;
+
+  lldb::RegisterContextSP
+  CreateRegisterContextForFrame(StackFrame *frame) override;
+
+  /// \return
+  ///   The trace file of this thread.
+  const std::optional<FileSpec> &GetTraceFile() const;
+
+protected:
+  bool CalculateStopInfo() override;
+
+  lldb::RegisterContextSP m_thread_reg_ctx_sp;
+
+private:
+  std::optional<FileSpec> m_trace_file;
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_TARGET_THREADPOSTMORTEMTRACE_H