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//===-- 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;
llvm::Expected<ModuleSP> module_sp_or_err =
m_process->ReadModuleFromMemory(file, base_addr);
if (auto err = module_sp_or_err.takeError()) {
LLDB_LOG_ERROR(GetLog(LLDBLog::DynamicLoader), std::move(err),
"Failed to read module from memory: {0}");
return nullptr;
}
if (ModuleSP module_sp = *module_sp_or_err) {
UpdateLoadedSections(module_sp, link_map_addr, base_addr, false);
m_process->GetTarget().GetImages().AppendIfNeeded(module_sp);
return module_sp;
}
return nullptr;
}
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