[Lldb-commits] [lldb] [lldb/Target] Add SyntheticFrameProvider class (PR #166664)

[Jonas Devlieghere via lldb-commits]

================
@@ -0,0 +1,163 @@
+//===----------------------------------------------------------------------===//
+//
+// 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_SYNTHETICFRAMEPROVIDER_H
+#define LLDB_TARGET_SYNTHETICFRAMEPROVIDER_H
+
+#include "lldb/Core/PluginInterface.h"
+#include "lldb/Target/StackFrameList.h"
+#include "lldb/Target/ThreadSpec.h"
+#include "lldb/Utility/ScriptedMetadata.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/lldb-forward.h"
+#include "llvm/Support/Error.h"
+
+#include <optional>
+#include <vector>
+
+namespace lldb_private {
+
+/// This struct contains the metadata needed to instantiate a frame provider
+/// and optional filters to control which threads it applies to.
+struct SyntheticFrameProviderDescriptor {
+  /// Metadata for instantiating the provider (e.g., script class name and args)
+  lldb::ScriptedMetadataSP scripted_metadata_sp;
+
+  /// Optional list of thread specifications to which this provider applies.
+  /// If empty, the provider applies to all threads. A thread matches if it
+  /// satisfies ANY of the specs in this vector (OR logic).
+  std::vector<ThreadSpec> thread_specs;
+
+  SyntheticFrameProviderDescriptor() = default;
+
+  SyntheticFrameProviderDescriptor(lldb::ScriptedMetadataSP metadata_sp)
+      : scripted_metadata_sp(metadata_sp) {}
+
+  SyntheticFrameProviderDescriptor(lldb::ScriptedMetadataSP metadata_sp,
+                                   const std::vector<ThreadSpec> &specs)
+      : scripted_metadata_sp(metadata_sp), thread_specs(specs) {}
+
+  virtual ~SyntheticFrameProviderDescriptor() = default;
+
+  /// Get the name of this descriptor (the scripted class name).
+  llvm::StringRef GetName() const {
+    return scripted_metadata_sp ? scripted_metadata_sp->GetClassName() : "";
+  }
+
+  /// Check if this descriptor applies to the given thread.
+  bool AppliesToThread(Thread &thread) const {
+    // If no thread specs specified, applies to all threads
+    if (thread_specs.empty())
+      return true;
+
+    // Check if the thread matches any of the specs (OR logic)
----------------
JDevlieghere wrote:

```suggestion
    // Check if the thread matches any of the specs (OR logic).
```

https://github.com/llvm/llvm-project/pull/166664