78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
//===-- LocationsRequestHandler.cpp ---------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DAP.h"
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#include "DAPError.h"
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#include "EventHelper.h"
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#include "JSONUtils.h"
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#include "LLDBUtils.h"
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#include "ProtocolUtils.h"
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#include "RequestHandler.h"
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#include "lldb/API/SBAddress.h"
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#include "lldb/API/SBDeclaration.h"
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#include "lldb/API/SBLineEntry.h"
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namespace lldb_dap {
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// Looks up information about a location reference previously returned by the
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// debug adapter.
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llvm::Expected<protocol::LocationsResponseBody>
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LocationsRequestHandler::Run(const protocol::LocationsArguments &args) const {
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protocol::LocationsResponseBody response;
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// We use the lowest bit to distinguish between value location and declaration
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// location
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auto [var_ref, is_value_location] = UnpackLocation(args.locationReference);
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lldb::SBValue variable = dap.variables.GetVariable(var_ref);
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if (!variable.IsValid())
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return llvm::make_error<DAPError>("Invalid variable reference");
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if (is_value_location) {
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// Get the value location
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if (!variable.GetType().IsPointerType() &&
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!variable.GetType().IsReferenceType())
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return llvm::make_error<DAPError>(
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"Value locations are only available for pointers and references");
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lldb::addr_t raw_addr = variable.GetValueAsAddress();
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lldb::SBAddress addr = dap.target.ResolveLoadAddress(raw_addr);
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lldb::SBLineEntry line_entry = GetLineEntryForAddress(dap.target, addr);
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if (!line_entry.IsValid())
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return llvm::make_error<DAPError>(
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"Failed to resolve line entry for location");
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std::optional<protocol::Source> source =
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CreateSource(line_entry.GetFileSpec());
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if (!source)
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return llvm::make_error<DAPError>(
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"Failed to resolve file path for location");
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response.source = std::move(*source);
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response.line = line_entry.GetLine();
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response.column = line_entry.GetColumn();
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} else {
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// Get the declaration location
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lldb::SBDeclaration decl = variable.GetDeclaration();
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if (!decl.IsValid())
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return llvm::make_error<DAPError>("No declaration location available");
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std::optional<protocol::Source> source = CreateSource(decl.GetFileSpec());
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if (!source)
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return llvm::make_error<DAPError>(
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"Failed to resolve file path for location");
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response.source = std::move(*source);
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response.line = decl.GetLine();
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response.column = decl.GetColumn();
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}
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return response;
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}
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} // namespace lldb_dap
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