diff options
Diffstat (limited to 'lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp')
| -rw-r--r-- | lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp | 149 |
1 files changed, 145 insertions, 4 deletions
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp index b0785a687f5..30db5583ac8 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp @@ -21,6 +21,7 @@ #include "lldb/Core/ModuleSpec.h" #include "lldb/Core/State.h" #include "lldb/Host/HostInfo.h" +#include "lldb/Host/XML.h" #include "lldb/Interpreter/Args.h" #include "lldb/Symbol/Symbol.h" #include "lldb/Target/MemoryRegionInfo.h" @@ -81,6 +82,7 @@ GDBRemoteCommunicationClient::GDBRemoteCommunicationClient() m_supports_qXfer_libraries_read(eLazyBoolCalculate), m_supports_qXfer_libraries_svr4_read(eLazyBoolCalculate), m_supports_qXfer_features_read(eLazyBoolCalculate), + m_supports_qXfer_memory_map_read(eLazyBoolCalculate), m_supports_augmented_libraries_svr4_read(eLazyBoolCalculate), m_supports_jThreadExtendedInfo(eLazyBoolCalculate), m_supports_jLoadedDynamicLibrariesInfos(eLazyBoolCalculate), @@ -103,7 +105,8 @@ GDBRemoteCommunicationClient::GDBRemoteCommunicationClient() m_hostname(), m_gdb_server_name(), m_gdb_server_version(UINT32_MAX), m_default_packet_timeout(0), m_max_packet_size(0), m_qSupported_response(), m_supported_async_json_packets_is_valid(false), - m_supported_async_json_packets_sp() {} + m_supported_async_json_packets_sp(), m_qXfer_memory_map(), + m_qXfer_memory_map_loaded(false) {} //---------------------------------------------------------------------- // Destructor @@ -192,6 +195,13 @@ bool GDBRemoteCommunicationClient::GetQXferFeaturesReadSupported() { return m_supports_qXfer_features_read == eLazyBoolYes; } +bool GDBRemoteCommunicationClient::GetQXferMemoryMapReadSupported() { + if (m_supports_qXfer_memory_map_read == eLazyBoolCalculate) { + GetRemoteQSupported(); + } + return m_supports_qXfer_memory_map_read == eLazyBoolYes; +} + uint64_t GDBRemoteCommunicationClient::GetRemoteMaxPacketSize() { if (m_max_packet_size == 0) { GetRemoteQSupported(); @@ -296,6 +306,7 @@ void GDBRemoteCommunicationClient::ResetDiscoverableSettings(bool did_exec) { m_supports_qXfer_libraries_read = eLazyBoolCalculate; m_supports_qXfer_libraries_svr4_read = eLazyBoolCalculate; m_supports_qXfer_features_read = eLazyBoolCalculate; + m_supports_qXfer_memory_map_read = eLazyBoolCalculate; m_supports_augmented_libraries_svr4_read = eLazyBoolCalculate; m_supports_qProcessInfoPID = true; m_supports_qfProcessInfo = true; @@ -342,6 +353,7 @@ void GDBRemoteCommunicationClient::GetRemoteQSupported() { m_supports_qXfer_libraries_svr4_read = eLazyBoolNo; m_supports_augmented_libraries_svr4_read = eLazyBoolNo; m_supports_qXfer_features_read = eLazyBoolNo; + m_supports_qXfer_memory_map_read = eLazyBoolNo; m_max_packet_size = UINT64_MAX; // It's supposed to always be there, but if // not, we assume no limit @@ -377,6 +389,8 @@ void GDBRemoteCommunicationClient::GetRemoteQSupported() { m_supports_qXfer_libraries_read = eLazyBoolYes; if (::strstr(response_cstr, "qXfer:features:read+")) m_supports_qXfer_features_read = eLazyBoolYes; + if (::strstr(response_cstr, "qXfer:memory-map:read+")) + m_supports_qXfer_memory_map_read = eLazyBoolYes; // Look for a list of compressions in the features list e.g. // qXfer:features:read+;PacketSize=20000;qEcho+;SupportedCompressions=zlib-deflate,lzma @@ -1460,7 +1474,8 @@ Status GDBRemoteCommunicationClient::GetMemoryRegionInfo( UNUSED_IF_ASSERT_DISABLED(packet_len); StringExtractorGDBRemote response; if (SendPacketAndWaitForResponse(packet, response, false) == - PacketResult::Success) { + PacketResult::Success && + response.GetResponseType() == StringExtractorGDBRemote::eResponse) { llvm::StringRef name; llvm::StringRef value; addr_t addr_value = LLDB_INVALID_ADDRESS; @@ -1536,8 +1551,134 @@ Status GDBRemoteCommunicationClient::GetMemoryRegionInfo( if (m_supports_memory_region_info == eLazyBoolNo) { error.SetErrorString("qMemoryRegionInfo is not supported"); } - if (error.Fail()) - region_info.Clear(); + + // Try qXfer:memory-map:read to get region information not included in + // qMemoryRegionInfo + MemoryRegionInfo qXfer_region_info; + Status qXfer_error = GetQXferMemoryMapRegionInfo(addr, qXfer_region_info); + + if (error.Fail()) { + // If qMemoryRegionInfo failed, but qXfer:memory-map:read succeeded, + // use the qXfer result as a fallback + if (qXfer_error.Success()) { + region_info = qXfer_region_info; + error.Clear(); + } else { + region_info.Clear(); + } + } else if (qXfer_error.Success()) { + // If both qMemoryRegionInfo and qXfer:memory-map:read succeeded, and if + // both regions are the same range, update the result to include the + // flash-memory information that is specific to the qXfer result. + if (region_info.GetRange() == qXfer_region_info.GetRange()) { + region_info.SetFlash(qXfer_region_info.GetFlash()); + region_info.SetBlocksize(qXfer_region_info.GetBlocksize()); + } + } + return error; +} + +Status GDBRemoteCommunicationClient::GetQXferMemoryMapRegionInfo( + lldb::addr_t addr, MemoryRegionInfo ®ion) { + Status error = LoadQXferMemoryMap(); + if (!error.Success()) + return error; + for (const auto &map_region : m_qXfer_memory_map) { + if (map_region.GetRange().Contains(addr)) { + region = map_region; + return error; + } + } + error.SetErrorString("Region not found"); + return error; +} + +Status GDBRemoteCommunicationClient::LoadQXferMemoryMap() { + + Status error; + + if (m_qXfer_memory_map_loaded) + // Already loaded, return success + return error; + + if (!XMLDocument::XMLEnabled()) { + error.SetErrorString("XML is not supported"); + return error; + } + + if (!GetQXferMemoryMapReadSupported()) { + error.SetErrorString("Memory map is not supported"); + return error; + } + + std::string xml; + lldb_private::Status lldberr; + if (!ReadExtFeature(ConstString("memory-map"), ConstString(""), xml, + lldberr)) { + error.SetErrorString("Failed to read memory map"); + return error; + } + + XMLDocument xml_document; + + if (!xml_document.ParseMemory(xml.c_str(), xml.size())) { + error.SetErrorString("Failed to parse memory map xml"); + return error; + } + + XMLNode map_node = xml_document.GetRootElement("memory-map"); + if (!map_node) { + error.SetErrorString("Invalid root node in memory map xml"); + return error; + } + + m_qXfer_memory_map.clear(); + + map_node.ForEachChildElement([this](const XMLNode &memory_node) -> bool { + if (!memory_node.IsElement()) + return true; + if (memory_node.GetName() != "memory") + return true; + auto type = memory_node.GetAttributeValue("type", ""); + uint64_t start; + uint64_t length; + if (!memory_node.GetAttributeValueAsUnsigned("start", start)) + return true; + if (!memory_node.GetAttributeValueAsUnsigned("length", length)) + return true; + MemoryRegionInfo region; + region.GetRange().SetRangeBase(start); + region.GetRange().SetByteSize(length); + if (type == "rom") { + region.SetReadable(MemoryRegionInfo::eYes); + this->m_qXfer_memory_map.push_back(region); + } else if (type == "ram") { + region.SetReadable(MemoryRegionInfo::eYes); + region.SetWritable(MemoryRegionInfo::eYes); + this->m_qXfer_memory_map.push_back(region); + } else if (type == "flash") { + region.SetFlash(MemoryRegionInfo::eYes); + memory_node.ForEachChildElement( + [®ion](const XMLNode &prop_node) -> bool { + if (!prop_node.IsElement()) + return true; + if (prop_node.GetName() != "property") + return true; + auto propname = prop_node.GetAttributeValue("name", ""); + if (propname == "blocksize") { + uint64_t blocksize; + if (prop_node.GetElementTextAsUnsigned(blocksize)) + region.SetBlocksize(blocksize); + } + return true; + }); + this->m_qXfer_memory_map.push_back(region); + } + return true; + }); + + m_qXfer_memory_map_loaded = true; + return error; } |
