71 lines · cpp
1//===-- SourceRequestHandler.cpp ------------------------------------------===//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 "DAP.h"10#include "Handler/RequestHandler.h"11#include "LLDBUtils.h"12#include "Protocol/ProtocolRequests.h"13#include "Protocol/ProtocolTypes.h"14#include "lldb/API/SBAddress.h"15#include "lldb/API/SBExecutionContext.h"16#include "lldb/API/SBFrame.h"17#include "lldb/API/SBInstructionList.h"18#include "lldb/API/SBProcess.h"19#include "lldb/API/SBStream.h"20#include "lldb/API/SBSymbol.h"21#include "lldb/API/SBTarget.h"22#include "lldb/API/SBThread.h"23#include "lldb/lldb-types.h"24#include "llvm/Support/Error.h"25 26namespace lldb_dap {27 28/// Source request; value of command field is 'source'. The request retrieves29/// the source code for a given source reference.30llvm::Expected<protocol::SourceResponseBody>31SourceRequestHandler::Run(const protocol::SourceArguments &args) const {32 33 uint32_t source_ref =34 args.source->sourceReference.value_or(args.sourceReference);35 const std::optional<lldb::addr_t> source_addr_opt =36 dap.GetSourceReferenceAddress(source_ref);37 38 if (!source_addr_opt)39 return llvm::make_error<DAPError>(40 llvm::formatv("Unknown source reference {}", source_ref));41 42 lldb::SBAddress address(*source_addr_opt, dap.target);43 if (!address.IsValid())44 return llvm::make_error<DAPError>("source not found");45 46 lldb::SBSymbol symbol = address.GetSymbol();47 lldb::SBInstructionList insts;48 49 if (symbol.IsValid()) {50 insts = symbol.GetInstructions(dap.target);51 } else {52 // No valid symbol, just return the disassembly.53 insts = dap.target.ReadInstructions(54 address, dap.k_number_of_assembly_lines_for_nodebug);55 }56 57 if (!insts || insts.GetSize() == 0)58 return llvm::make_error<DAPError>(59 llvm::formatv("no instruction source for address {}",60 address.GetLoadAddress(dap.target)));61 62 lldb::SBStream stream;63 lldb::SBExecutionContext exe_ctx(dap.target);64 insts.GetDescription(stream, exe_ctx);65 return protocol::SourceResponseBody{/*content=*/stream.GetData(),66 /*mimeType=*/67 "text/x-lldb.disassembly"};68}69 70} // namespace lldb_dap71