1 files changed, 82 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/DynamicLoader/wasm-DYLD/DynamicLoaderWasmDYLD.cpp b/contrib/llvm-project/lldb/source/Plugins/DynamicLoader/wasm-DYLD/DynamicLoaderWasmDYLD.cpp
new file mode 100644
index 000000000000..d019415cb67a
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/DynamicLoader/wasm-DYLD/DynamicLoaderWasmDYLD.cpp
@@ -0,0 +1,82 @@
+//===-- DynamicLoaderWasmDYLD.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 "DynamicLoaderWasmDYLD.h"
+
+#include "Plugins/ObjectFile/wasm/ObjectFileWasm.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Section.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "lldb/Utility/Log.h"
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace lldb_private::wasm;
+
+LLDB_PLUGIN_DEFINE(DynamicLoaderWasmDYLD)
+
+DynamicLoaderWasmDYLD::DynamicLoaderWasmDYLD(Process *process)
+    : DynamicLoader(process) {}
+
+void DynamicLoaderWasmDYLD::Initialize() {
+  PluginManager::RegisterPlugin(GetPluginNameStatic(),
+                                GetPluginDescriptionStatic(), CreateInstance);
+}
+
+llvm::StringRef DynamicLoaderWasmDYLD::GetPluginDescriptionStatic() {
+  return "Dynamic loader plug-in that watches for shared library "
+         "loads/unloads in WebAssembly engines.";
+}
+
+DynamicLoader *DynamicLoaderWasmDYLD::CreateInstance(Process *process,
+                                                     bool force) {
+  bool should_create = force;
+  if (!should_create) {
+    should_create =
+        (process->GetTarget().GetArchitecture().GetTriple().getArch() ==
+         llvm::Triple::wasm32);
+  }
+
+  if (should_create)
+    return new DynamicLoaderWasmDYLD(process);
+
+  return nullptr;
+}
+
+void DynamicLoaderWasmDYLD::DidAttach() {
+  Log *log = GetLog(LLDBLog::DynamicLoader);
+  LLDB_LOGF(log, "DynamicLoaderWasmDYLD::%s()", __FUNCTION__);
+
+  // Ask the process for the list of loaded WebAssembly modules.
+  auto error = m_process->LoadModules();
+  LLDB_LOG_ERROR(log, std::move(error), "Couldn't load modules: {0}");
+}
+
+ThreadPlanSP DynamicLoaderWasmDYLD::GetStepThroughTrampolinePlan(Thread &thread,
+                                                                 bool stop) {
+  return ThreadPlanSP();
+}
+
+lldb::ModuleSP DynamicLoaderWasmDYLD::LoadModuleAtAddress(
+    const lldb_private::FileSpec &file, lldb::addr_t link_map_addr,
+    lldb::addr_t base_addr, bool base_addr_is_offset) {
+  if (ModuleSP module_sp = DynamicLoader::LoadModuleAtAddress(
+          file, link_map_addr, base_addr, base_addr_is_offset))
+    return module_sp;
+
+  if (ModuleSP module_sp = m_process->ReadModuleFromMemory(file, base_addr)) {
+    UpdateLoadedSections(module_sp, link_map_addr, base_addr, false);
+    m_process->GetTarget().GetImages().AppendIfNeeded(module_sp);
+    return module_sp;
+  }
+
+  return nullptr;
+}