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-exception
6//
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 retrieves
29/// the source code for a given source reference.
30llvm::Expected<protocol::SourceResponseBody>
31SourceRequestHandler::Run(const protocol::SourceArguments &args) const {
32 const auto source =
33 args.source->sourceReference.value_or(u: args.sourceReference);
34
35 if (!source)
36 return llvm::make_error<DAPError>(
37 Args: "invalid arguments, expected source.sourceReference to be set");
38
39 lldb::SBAddress address(source, dap.target);
40 if (!address.IsValid())
41 return llvm::make_error<DAPError>(Args: "source not found");
42
43 lldb::SBSymbol symbol = address.GetSymbol();
44
45 lldb::SBStream stream;
46 lldb::SBExecutionContext exe_ctx(dap.target);
47
48 if (symbol.IsValid()) {
49 lldb::SBInstructionList insts = symbol.GetInstructions(target: dap.target);
50 insts.GetDescription(description&: stream, exe_ctx);
51 } else {
52 // No valid symbol, just return the disassembly.
53 lldb::SBInstructionList insts = dap.target.ReadInstructions(
54 base_addr: address, count: dap.k_number_of_assembly_lines_for_nodebug);
55 insts.GetDescription(description&: stream, exe_ctx);
56 }
57
58 return protocol::SourceResponseBody{/*content=*/stream.GetData(),
59 /*mimeType=*/"text/x-lldb.disassembly"};
60}
61
62} // namespace lldb_dap
63

source code of lldb/tools/lldb-dap/Handler/SourceRequestHandler.cpp