72 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "UnwindWasm.h"10#include "Plugins/Process/gdb-remote/ThreadGDBRemote.h"11#include "ProcessWasm.h"12#include "RegisterContextWasm.h"13#include "ThreadWasm.h"14#include "lldb/Utility/LLDBLog.h"15#include "lldb/Utility/Log.h"16 17using namespace lldb;18using namespace lldb_private;19using namespace process_gdb_remote;20using namespace wasm;21 22lldb::RegisterContextSP23UnwindWasm::DoCreateRegisterContextForFrame(lldb_private::StackFrame *frame) {24 if (m_frames.size() <= frame->GetFrameIndex())25 return lldb::RegisterContextSP();26 27 ThreadSP thread = frame->GetThread();28 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *>(thread.get());29 ProcessWasm *wasm_process =30 static_cast<ProcessWasm *>(thread->GetProcess().get());31 32 return std::make_shared<RegisterContextWasm>(*gdb_thread,33 frame->GetConcreteFrameIndex(),34 wasm_process->GetRegisterInfo());35}36 37uint32_t UnwindWasm::DoGetFrameCount() {38 if (m_unwind_complete)39 return m_frames.size();40 41 m_unwind_complete = true;42 m_frames.clear();43 44 ThreadWasm &wasm_thread = static_cast<ThreadWasm &>(GetThread());45 llvm::Expected<std::vector<lldb::addr_t>> call_stack_pcs =46 wasm_thread.GetWasmCallStack();47 if (!call_stack_pcs) {48 LLDB_LOG_ERROR(GetLog(LLDBLog::Unwind), call_stack_pcs.takeError(),49 "Failed to get Wasm callstack: {0}");50 m_frames.clear();51 return 0;52 }53 54 m_frames = *call_stack_pcs;55 return m_frames.size();56}57 58bool UnwindWasm::DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa,59 lldb::addr_t &pc,60 bool &behaves_like_zeroth_frame) {61 if (m_frames.size() == 0)62 DoGetFrameCount();63 64 if (frame_idx >= m_frames.size())65 return false;66 67 behaves_like_zeroth_frame = (frame_idx == 0);68 cfa = 0;69 pc = m_frames[frame_idx];70 return true;71}72