diff options
Diffstat (limited to 'lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp')
| -rw-r--r-- | lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp index 21a538ced17..d2a15b3152e 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp @@ -43,6 +43,10 @@ #include "ProcessGDBRemoteLog.h" #include "lldb/Host/Config.h" +#if defined (HAVE_LIBCOMPRESSION) +#include <compression.h> +#endif + using namespace lldb; using namespace lldb_private; using namespace lldb_private::process_gdb_remote; @@ -423,6 +427,59 @@ GDBRemoteCommunicationClient::GetRemoteQSupported () if (::strstr (response_cstr, "qXfer:features:read+")) m_supports_qXfer_features_read = eLazyBoolYes; + + // Look for a list of compressions in the features list e.g. + // qXfer:features:read+;PacketSize=20000;qEcho+;SupportedCompressions=zlib-deflate,lzma + const char *features_list = ::strstr (response_cstr, "qXfer:features:"); + if (features_list) + { + const char *compressions = ::strstr (features_list, "SupportedCompressions="); + if (compressions) + { + std::vector<std::string> supported_compressions; + compressions += sizeof ("SupportedCompressions=") - 1; + const char *end_of_compressions = strchr (compressions, ';'); + if (end_of_compressions == NULL) + { + end_of_compressions = strchr (compressions, '\0'); + } + const char *current_compression = compressions; + while (current_compression < end_of_compressions) + { + const char *next_compression_name = strchr (current_compression, ','); + const char *end_of_this_word = next_compression_name; + if (next_compression_name == NULL || end_of_compressions < next_compression_name) + { + end_of_this_word = end_of_compressions; + } + + if (end_of_this_word) + { + if (end_of_this_word == current_compression) + { + current_compression++; + } + else + { + std::string this_compression (current_compression, end_of_this_word - current_compression); + supported_compressions.push_back (this_compression); + current_compression = end_of_this_word + 1; + } + } + else + { + supported_compressions.push_back (current_compression); + current_compression = end_of_compressions; + } + } + + if (supported_compressions.size() > 0) + { + MaybeEnableCompression (supported_compressions); + } + } + } + if (::strstr (response_cstr, "qEcho")) m_supports_qEcho = eLazyBoolYes; else @@ -1629,6 +1686,105 @@ GDBRemoteCommunicationClient::GetGDBServerVersion() return m_qGDBServerVersion_is_valid == eLazyBoolYes; } +void +GDBRemoteCommunicationClient::MaybeEnableCompression (std::vector<std::string> supported_compressions) +{ + CompressionType avail_type = CompressionType::None; + std::string avail_name; + +#if defined (HAVE_LIBCOMPRESSION) + // libcompression is weak linked so test if compression_decode_buffer() is available + if (compression_decode_buffer != NULL && avail_type == CompressionType::None) + { + for (auto compression : supported_compressions) + { + if (compression == "lzfse") + { + avail_type = CompressionType::LZFSE; + avail_name = compression; + break; + } + } + } +#endif + +#if defined (HAVE_LIBCOMPRESSION) + // libcompression is weak linked so test if compression_decode_buffer() is available + if (compression_decode_buffer != NULL && avail_type == CompressionType::None) + { + for (auto compression : supported_compressions) + { + if (compression == "zlib-deflate") + { + avail_type = CompressionType::ZlibDeflate; + avail_name = compression; + break; + } + } + } +#endif + +#if defined (HAVE_LIBZ) + if (avail_type == CompressionType::None) + { + for (auto compression : supported_compressions) + { + if (compression == "zlib-deflate") + { + avail_type = CompressionType::ZlibDeflate; + avail_name = compression; + break; + } + } + } +#endif + +#if defined (HAVE_LIBCOMPRESSION) + // libcompression is weak linked so test if compression_decode_buffer() is available + if (compression_decode_buffer != NULL && avail_type == CompressionType::None) + { + for (auto compression : supported_compressions) + { + if (compression == "lz4") + { + avail_type = CompressionType::LZ4; + avail_name = compression; + break; + } + } + } +#endif + +#if defined (HAVE_LIBCOMPRESSION) + // libcompression is weak linked so test if compression_decode_buffer() is available + if (compression_decode_buffer != NULL && avail_type == CompressionType::None) + { + for (auto compression : supported_compressions) + { + if (compression == "lzma") + { + avail_type = CompressionType::LZMA; + avail_name = compression; + break; + } + } + } +#endif + + if (avail_type != CompressionType::None) + { + StringExtractorGDBRemote response; + std::string packet = "QEnableCompression:type:" + avail_name + ";"; + if (SendPacketAndWaitForResponse (packet.c_str(), response, false) != PacketResult::Success) + return; + + if (response.IsOKResponse()) + { + m_compression_type = avail_type; + } + } +} + const char * GDBRemoteCommunicationClient::GetGDBServerProgramName() { |
