| 1 | //===-- DynamicLoaderWasmDYLD.cpp -----------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "DynamicLoaderWasmDYLD.h" |
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| 10 | |
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| 11 | #include "Plugins/ObjectFile/wasm/ObjectFileWasm.h" |
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| 12 | #include "lldb/Core/Module.h" |
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| 13 | #include "lldb/Core/PluginManager.h" |
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| 14 | #include "lldb/Core/Section.h" |
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| 15 | #include "lldb/Target/Process.h" |
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| 16 | #include "lldb/Target/Target.h" |
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| 17 | #include "lldb/Utility/LLDBLog.h" |
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| 18 | #include "lldb/Utility/Log.h" |
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| 19 | |
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| 20 | using namespace lldb; |
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| 21 | using namespace lldb_private; |
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| 22 | using namespace lldb_private::wasm; |
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| 23 | |
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| 24 | LLDB_PLUGIN_DEFINE(DynamicLoaderWasmDYLD) |
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| 25 | |
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| 26 | DynamicLoaderWasmDYLD::DynamicLoaderWasmDYLD(Process *process) |
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| 27 | : DynamicLoader(process) {} |
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| 28 | |
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| 29 | void DynamicLoaderWasmDYLD::Initialize() { |
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| 30 | PluginManager::RegisterPlugin(name: GetPluginNameStatic(), |
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| 31 | description: GetPluginDescriptionStatic(), create_callback: CreateInstance); |
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| 32 | } |
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| 33 | |
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| 34 | llvm::StringRef DynamicLoaderWasmDYLD::GetPluginDescriptionStatic() { |
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| 35 | return "Dynamic loader plug-in that watches for shared library " |
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| 36 | "loads/unloads in WebAssembly engines." ; |
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| 37 | } |
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| 38 | |
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| 39 | DynamicLoader *DynamicLoaderWasmDYLD::CreateInstance(Process *process, |
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| 40 | bool force) { |
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| 41 | bool should_create = force; |
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| 42 | if (!should_create) { |
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| 43 | should_create = |
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| 44 | (process->GetTarget().GetArchitecture().GetTriple().getArch() == |
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| 45 | llvm::Triple::wasm32); |
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| 46 | } |
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| 47 | |
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| 48 | if (should_create) |
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| 49 | return new DynamicLoaderWasmDYLD(process); |
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| 50 | |
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| 51 | return nullptr; |
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| 52 | } |
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| 53 | |
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| 54 | void DynamicLoaderWasmDYLD::DidAttach() { |
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| 55 | Log *log = GetLog(mask: LLDBLog::DynamicLoader); |
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| 56 | LLDB_LOGF(log, "DynamicLoaderWasmDYLD::%s()" , __FUNCTION__); |
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| 57 | |
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| 58 | // Ask the process for the list of loaded WebAssembly modules. |
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| 59 | auto error = m_process->LoadModules(); |
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| 60 | LLDB_LOG_ERROR(log, std::move(error), "Couldn't load modules: {0}" ); |
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| 61 | } |
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| 62 | |
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| 63 | ThreadPlanSP DynamicLoaderWasmDYLD::GetStepThroughTrampolinePlan(Thread &thread, |
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| 64 | bool stop) { |
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| 65 | return ThreadPlanSP(); |
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| 66 | } |
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| 67 | |
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| 68 | lldb::ModuleSP DynamicLoaderWasmDYLD::LoadModuleAtAddress( |
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| 69 | const lldb_private::FileSpec &file, lldb::addr_t link_map_addr, |
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| 70 | lldb::addr_t base_addr, bool base_addr_is_offset) { |
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| 71 | if (ModuleSP module_sp = DynamicLoader::LoadModuleAtAddress( |
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| 72 | file, link_map_addr, base_addr, base_addr_is_offset)) |
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| 73 | return module_sp; |
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| 74 | |
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| 75 | if (ModuleSP module_sp = m_process->ReadModuleFromMemory(file_spec: file, header_addr: base_addr)) { |
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| 76 | UpdateLoadedSections(module: module_sp, link_map_addr, base_addr, base_addr_is_offset: false); |
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| 77 | m_process->GetTarget().GetImages().AppendIfNeeded(new_module: module_sp); |
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| 78 | return module_sp; |
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| 79 | } |
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| 80 | |
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| 81 | return nullptr; |
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| 82 | } |
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| 83 | |
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