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//===-- SourceRequestHandler.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 "DAP.h"
#include "Handler/RequestHandler.h"
#include "LLDBUtils.h"
#include "Protocol/ProtocolRequests.h"
#include "Protocol/ProtocolTypes.h"
#include "lldb/API/SBAddress.h"
#include "lldb/API/SBExecutionContext.h"
#include "lldb/API/SBFrame.h"
#include "lldb/API/SBInstructionList.h"
#include "lldb/API/SBProcess.h"
#include "lldb/API/SBStream.h"
#include "lldb/API/SBSymbol.h"
#include "lldb/API/SBTarget.h"
#include "lldb/API/SBThread.h"
#include "lldb/lldb-types.h"
#include "llvm/Support/Error.h"
namespace lldb_dap {
/// Source request; value of command field is 'source'. The request retrieves
/// the source code for a given source reference.
llvm::Expected<protocol::SourceResponseBody>
SourceRequestHandler::Run(const protocol::SourceArguments &args) const {
uint32_t source_ref =
args.source->sourceReference.value_or(args.sourceReference);
const std::optional<lldb::addr_t> source_addr_opt =
dap.GetSourceReferenceAddress(source_ref);
if (!source_addr_opt)
return llvm::make_error<DAPError>(
llvm::formatv("Unknown source reference {}", source_ref));
lldb::SBAddress address(*source_addr_opt, dap.target);
if (!address.IsValid())
return llvm::make_error<DAPError>("source not found");
lldb::SBSymbol symbol = address.GetSymbol();
lldb::SBInstructionList insts;
if (symbol.IsValid()) {
insts = symbol.GetInstructions(dap.target);
} else {
// No valid symbol, just return the disassembly.
insts = dap.target.ReadInstructions(
address, dap.k_number_of_assembly_lines_for_nodebug);
}
if (!insts || insts.GetSize() == 0)
return llvm::make_error<DAPError>(
llvm::formatv("no instruction source for address {}",
address.GetLoadAddress(dap.target)));
lldb::SBStream stream;
lldb::SBExecutionContext exe_ctx(dap.target);
insts.GetDescription(stream, exe_ctx);
return protocol::SourceResponseBody{/*content=*/stream.GetData(),
/*mimeType=*/
"text/x-lldb.disassembly"};
}
} // namespace lldb_dap
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