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609 lines
18 KiB
609 lines
18 KiB
//===-- StringExtractorGDBRemote.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 "lldb/Utility/StringExtractorGDBRemote.h"
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#include <ctype.h>
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#include <string.h>
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StringExtractorGDBRemote::ResponseType
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StringExtractorGDBRemote::GetResponseType() const {
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if (m_packet.empty())
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return eUnsupported;
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switch (m_packet[0]) {
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case 'E':
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if (isxdigit(m_packet[1]) && isxdigit(m_packet[2])) {
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if (m_packet.size() == 3)
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return eError;
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llvm::StringRef packet_ref(m_packet);
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if (packet_ref[3] == ';') {
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auto err_string = packet_ref.substr(4);
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for (auto e : err_string)
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if (!isxdigit(e))
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return eResponse;
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return eError;
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}
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}
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break;
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case 'O':
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if (m_packet.size() == 2 && m_packet[1] == 'K')
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return eOK;
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break;
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case '+':
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if (m_packet.size() == 1)
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return eAck;
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break;
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case '-':
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if (m_packet.size() == 1)
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return eNack;
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break;
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}
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return eResponse;
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}
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StringExtractorGDBRemote::ServerPacketType
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StringExtractorGDBRemote::GetServerPacketType() const {
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#define PACKET_MATCHES(s) \
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((packet_size == (sizeof(s) - 1)) && (strcmp((packet_cstr), (s)) == 0))
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#define PACKET_STARTS_WITH(s) \
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((packet_size >= (sizeof(s) - 1)) && \
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::strncmp(packet_cstr, s, (sizeof(s) - 1)) == 0)
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// Empty is not a supported packet...
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if (m_packet.empty())
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return eServerPacketType_invalid;
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const size_t packet_size = m_packet.size();
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const char *packet_cstr = m_packet.c_str();
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switch (m_packet[0]) {
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case '%':
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return eServerPacketType_notify;
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case '\x03':
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if (packet_size == 1)
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return eServerPacketType_interrupt;
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break;
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case '-':
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if (packet_size == 1)
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return eServerPacketType_nack;
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break;
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case '+':
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if (packet_size == 1)
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return eServerPacketType_ack;
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break;
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case 'A':
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return eServerPacketType_A;
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case 'Q':
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switch (packet_cstr[1]) {
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case 'E':
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if (PACKET_STARTS_WITH("QEnvironment:"))
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return eServerPacketType_QEnvironment;
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if (PACKET_STARTS_WITH("QEnvironmentHexEncoded:"))
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return eServerPacketType_QEnvironmentHexEncoded;
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if (PACKET_STARTS_WITH("QEnableErrorStrings"))
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return eServerPacketType_QEnableErrorStrings;
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break;
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case 'P':
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if (PACKET_STARTS_WITH("QPassSignals:"))
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return eServerPacketType_QPassSignals;
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break;
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case 'S':
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if (PACKET_MATCHES("QStartNoAckMode"))
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return eServerPacketType_QStartNoAckMode;
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if (PACKET_STARTS_WITH("QSaveRegisterState"))
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return eServerPacketType_QSaveRegisterState;
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if (PACKET_STARTS_WITH("QSetDisableASLR:"))
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return eServerPacketType_QSetDisableASLR;
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if (PACKET_STARTS_WITH("QSetDetachOnError:"))
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return eServerPacketType_QSetDetachOnError;
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if (PACKET_STARTS_WITH("QSetSTDIN:"))
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return eServerPacketType_QSetSTDIN;
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if (PACKET_STARTS_WITH("QSetSTDOUT:"))
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return eServerPacketType_QSetSTDOUT;
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if (PACKET_STARTS_WITH("QSetSTDERR:"))
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return eServerPacketType_QSetSTDERR;
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if (PACKET_STARTS_WITH("QSetWorkingDir:"))
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return eServerPacketType_QSetWorkingDir;
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if (PACKET_STARTS_WITH("QSetLogging:"))
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return eServerPacketType_QSetLogging;
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if (PACKET_STARTS_WITH("QSetMaxPacketSize:"))
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return eServerPacketType_QSetMaxPacketSize;
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if (PACKET_STARTS_WITH("QSetMaxPayloadSize:"))
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return eServerPacketType_QSetMaxPayloadSize;
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if (PACKET_STARTS_WITH("QSetEnableAsyncProfiling;"))
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return eServerPacketType_QSetEnableAsyncProfiling;
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if (PACKET_STARTS_WITH("QSyncThreadState:"))
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return eServerPacketType_QSyncThreadState;
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break;
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case 'L':
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if (PACKET_STARTS_WITH("QLaunchArch:"))
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return eServerPacketType_QLaunchArch;
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if (PACKET_MATCHES("QListThreadsInStopReply"))
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return eServerPacketType_QListThreadsInStopReply;
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break;
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case 'R':
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if (PACKET_STARTS_WITH("QRestoreRegisterState:"))
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return eServerPacketType_QRestoreRegisterState;
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break;
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case 'T':
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if (PACKET_MATCHES("QThreadSuffixSupported"))
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return eServerPacketType_QThreadSuffixSupported;
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break;
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}
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break;
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case 'q':
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switch (packet_cstr[1]) {
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case 's':
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if (PACKET_MATCHES("qsProcessInfo"))
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return eServerPacketType_qsProcessInfo;
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if (PACKET_MATCHES("qsThreadInfo"))
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return eServerPacketType_qsThreadInfo;
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break;
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case 'f':
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if (PACKET_STARTS_WITH("qfProcessInfo"))
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return eServerPacketType_qfProcessInfo;
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if (PACKET_STARTS_WITH("qfThreadInfo"))
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return eServerPacketType_qfThreadInfo;
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break;
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case 'C':
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if (packet_size == 2)
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return eServerPacketType_qC;
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break;
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case 'E':
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if (PACKET_STARTS_WITH("qEcho:"))
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return eServerPacketType_qEcho;
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break;
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case 'F':
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if (PACKET_STARTS_WITH("qFileLoadAddress:"))
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return eServerPacketType_qFileLoadAddress;
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break;
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case 'G':
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if (PACKET_STARTS_WITH("qGroupName:"))
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return eServerPacketType_qGroupName;
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if (PACKET_MATCHES("qGetWorkingDir"))
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return eServerPacketType_qGetWorkingDir;
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if (PACKET_MATCHES("qGetPid"))
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return eServerPacketType_qGetPid;
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if (PACKET_STARTS_WITH("qGetProfileData;"))
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return eServerPacketType_qGetProfileData;
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if (PACKET_MATCHES("qGDBServerVersion"))
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return eServerPacketType_qGDBServerVersion;
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break;
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case 'H':
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if (PACKET_MATCHES("qHostInfo"))
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return eServerPacketType_qHostInfo;
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break;
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case 'K':
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if (PACKET_STARTS_WITH("qKillSpawnedProcess"))
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return eServerPacketType_qKillSpawnedProcess;
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break;
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case 'L':
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if (PACKET_STARTS_WITH("qLaunchGDBServer"))
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return eServerPacketType_qLaunchGDBServer;
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if (PACKET_MATCHES("qLaunchSuccess"))
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return eServerPacketType_qLaunchSuccess;
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break;
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case 'M':
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if (PACKET_STARTS_WITH("qMemoryRegionInfo:"))
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return eServerPacketType_qMemoryRegionInfo;
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if (PACKET_MATCHES("qMemoryRegionInfo"))
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return eServerPacketType_qMemoryRegionInfoSupported;
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if (PACKET_STARTS_WITH("qModuleInfo:"))
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return eServerPacketType_qModuleInfo;
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break;
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case 'P':
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if (PACKET_STARTS_WITH("qProcessInfoPID:"))
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return eServerPacketType_qProcessInfoPID;
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if (PACKET_STARTS_WITH("qPlatform_shell:"))
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return eServerPacketType_qPlatform_shell;
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if (PACKET_STARTS_WITH("qPlatform_mkdir:"))
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return eServerPacketType_qPlatform_mkdir;
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if (PACKET_STARTS_WITH("qPlatform_chmod:"))
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return eServerPacketType_qPlatform_chmod;
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if (PACKET_MATCHES("qProcessInfo"))
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return eServerPacketType_qProcessInfo;
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if (PACKET_STARTS_WITH("qPathComplete:"))
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return eServerPacketType_qPathComplete;
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break;
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case 'Q':
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if (PACKET_MATCHES("qQueryGDBServer"))
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return eServerPacketType_qQueryGDBServer;
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break;
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case 'R':
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if (PACKET_STARTS_WITH("qRcmd,"))
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return eServerPacketType_qRcmd;
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if (PACKET_STARTS_WITH("qRegisterInfo"))
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return eServerPacketType_qRegisterInfo;
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break;
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case 'S':
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if (PACKET_STARTS_WITH("qSpeedTest:"))
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return eServerPacketType_qSpeedTest;
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if (PACKET_MATCHES("qShlibInfoAddr"))
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return eServerPacketType_qShlibInfoAddr;
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if (PACKET_MATCHES("qStepPacketSupported"))
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return eServerPacketType_qStepPacketSupported;
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if (PACKET_STARTS_WITH("qSupported"))
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return eServerPacketType_qSupported;
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if (PACKET_MATCHES("qSyncThreadStateSupported"))
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return eServerPacketType_qSyncThreadStateSupported;
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break;
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case 'T':
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if (PACKET_STARTS_WITH("qThreadExtraInfo,"))
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return eServerPacketType_qThreadExtraInfo;
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if (PACKET_STARTS_WITH("qThreadStopInfo"))
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return eServerPacketType_qThreadStopInfo;
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break;
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case 'U':
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if (PACKET_STARTS_WITH("qUserName:"))
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return eServerPacketType_qUserName;
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break;
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case 'V':
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if (PACKET_MATCHES("qVAttachOrWaitSupported"))
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return eServerPacketType_qVAttachOrWaitSupported;
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break;
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case 'W':
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if (PACKET_STARTS_WITH("qWatchpointSupportInfo:"))
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return eServerPacketType_qWatchpointSupportInfo;
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if (PACKET_MATCHES("qWatchpointSupportInfo"))
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return eServerPacketType_qWatchpointSupportInfoSupported;
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break;
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case 'X':
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if (PACKET_STARTS_WITH("qXfer:"))
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return eServerPacketType_qXfer;
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break;
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}
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break;
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case 'j':
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if (PACKET_STARTS_WITH("jModulesInfo:"))
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return eServerPacketType_jModulesInfo;
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if (PACKET_MATCHES("jSignalsInfo"))
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return eServerPacketType_jSignalsInfo;
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if (PACKET_MATCHES("jThreadsInfo"))
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return eServerPacketType_jThreadsInfo;
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if (PACKET_STARTS_WITH("jTraceBufferRead:"))
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return eServerPacketType_jTraceBufferRead;
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if (PACKET_STARTS_WITH("jTraceConfigRead:"))
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return eServerPacketType_jTraceConfigRead;
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if (PACKET_STARTS_WITH("jTraceMetaRead:"))
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return eServerPacketType_jTraceMetaRead;
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if (PACKET_STARTS_WITH("jTraceStart:"))
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return eServerPacketType_jTraceStart;
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if (PACKET_STARTS_WITH("jTraceStop:"))
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return eServerPacketType_jTraceStop;
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if (PACKET_MATCHES("jLLDBTraceSupportedType"))
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return eServerPacketType_jLLDBTraceSupportedType;
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break;
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case 'v':
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if (PACKET_STARTS_WITH("vFile:")) {
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if (PACKET_STARTS_WITH("vFile:open:"))
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return eServerPacketType_vFile_open;
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else if (PACKET_STARTS_WITH("vFile:close:"))
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return eServerPacketType_vFile_close;
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else if (PACKET_STARTS_WITH("vFile:pread"))
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return eServerPacketType_vFile_pread;
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else if (PACKET_STARTS_WITH("vFile:pwrite"))
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return eServerPacketType_vFile_pwrite;
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else if (PACKET_STARTS_WITH("vFile:size"))
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return eServerPacketType_vFile_size;
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else if (PACKET_STARTS_WITH("vFile:exists"))
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return eServerPacketType_vFile_exists;
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else if (PACKET_STARTS_WITH("vFile:stat"))
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return eServerPacketType_vFile_stat;
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else if (PACKET_STARTS_WITH("vFile:mode"))
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return eServerPacketType_vFile_mode;
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else if (PACKET_STARTS_WITH("vFile:MD5"))
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return eServerPacketType_vFile_md5;
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else if (PACKET_STARTS_WITH("vFile:symlink"))
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return eServerPacketType_vFile_symlink;
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else if (PACKET_STARTS_WITH("vFile:unlink"))
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return eServerPacketType_vFile_unlink;
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} else {
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if (PACKET_STARTS_WITH("vAttach;"))
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return eServerPacketType_vAttach;
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if (PACKET_STARTS_WITH("vAttachWait;"))
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return eServerPacketType_vAttachWait;
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if (PACKET_STARTS_WITH("vAttachOrWait;"))
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return eServerPacketType_vAttachOrWait;
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if (PACKET_STARTS_WITH("vAttachName;"))
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return eServerPacketType_vAttachName;
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if (PACKET_STARTS_WITH("vCont;"))
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return eServerPacketType_vCont;
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if (PACKET_MATCHES("vCont?"))
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return eServerPacketType_vCont_actions;
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}
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break;
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case '_':
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switch (packet_cstr[1]) {
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case 'M':
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return eServerPacketType__M;
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case 'm':
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return eServerPacketType__m;
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}
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break;
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case '?':
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if (packet_size == 1)
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return eServerPacketType_stop_reason;
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break;
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case 'c':
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return eServerPacketType_c;
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case 'C':
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return eServerPacketType_C;
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case 'D':
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if (packet_size == 1)
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return eServerPacketType_D;
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break;
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case 'g':
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return eServerPacketType_g;
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case 'G':
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return eServerPacketType_G;
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case 'H':
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return eServerPacketType_H;
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case 'I':
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return eServerPacketType_I;
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case 'k':
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if (packet_size == 1)
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return eServerPacketType_k;
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break;
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case 'm':
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return eServerPacketType_m;
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case 'M':
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return eServerPacketType_M;
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case 'p':
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return eServerPacketType_p;
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case 'P':
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return eServerPacketType_P;
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case 's':
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if (packet_size == 1)
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return eServerPacketType_s;
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break;
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case 'S':
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return eServerPacketType_S;
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case 'x':
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return eServerPacketType_x;
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case 'X':
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return eServerPacketType_X;
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case 'T':
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return eServerPacketType_T;
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case 'z':
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if (packet_cstr[1] >= '0' && packet_cstr[1] <= '4')
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return eServerPacketType_z;
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break;
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case 'Z':
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if (packet_cstr[1] >= '0' && packet_cstr[1] <= '4')
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return eServerPacketType_Z;
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break;
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}
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return eServerPacketType_unimplemented;
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}
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bool StringExtractorGDBRemote::IsOKResponse() const {
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return GetResponseType() == eOK;
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}
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bool StringExtractorGDBRemote::IsUnsupportedResponse() const {
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return GetResponseType() == eUnsupported;
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}
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bool StringExtractorGDBRemote::IsNormalResponse() const {
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return GetResponseType() == eResponse;
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}
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bool StringExtractorGDBRemote::IsErrorResponse() const {
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return GetResponseType() == eError && isxdigit(m_packet[1]) &&
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isxdigit(m_packet[2]);
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}
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uint8_t StringExtractorGDBRemote::GetError() {
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if (GetResponseType() == eError) {
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SetFilePos(1);
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return GetHexU8(255);
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}
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return 0;
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}
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lldb_private::Status StringExtractorGDBRemote::GetStatus() {
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lldb_private::Status error;
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if (GetResponseType() == eError) {
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SetFilePos(1);
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uint8_t errc = GetHexU8(255);
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error.SetError(errc, lldb::eErrorTypeGeneric);
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error.SetErrorStringWithFormat("Error %u", errc);
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std::string error_messg;
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if (GetChar() == ';') {
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GetHexByteString(error_messg);
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error.SetErrorString(error_messg);
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}
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}
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return error;
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}
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size_t StringExtractorGDBRemote::GetEscapedBinaryData(std::string &str) {
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// Just get the data bytes in the string as
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// GDBRemoteCommunication::CheckForPacket() already removes any 0x7d escaped
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// characters. If any 0x7d characters are left in the packet, then they are
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// supposed to be there...
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str.clear();
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const size_t bytes_left = GetBytesLeft();
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if (bytes_left > 0) {
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str.assign(m_packet, m_index, bytes_left);
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m_index += bytes_left;
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}
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return str.size();
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}
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static bool
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OKErrorNotSupportedResponseValidator(void *,
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const StringExtractorGDBRemote &response) {
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switch (response.GetResponseType()) {
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case StringExtractorGDBRemote::eOK:
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case StringExtractorGDBRemote::eError:
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case StringExtractorGDBRemote::eUnsupported:
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return true;
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case StringExtractorGDBRemote::eAck:
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case StringExtractorGDBRemote::eNack:
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case StringExtractorGDBRemote::eResponse:
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break;
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}
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return false;
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}
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static bool JSONResponseValidator(void *,
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const StringExtractorGDBRemote &response) {
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switch (response.GetResponseType()) {
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case StringExtractorGDBRemote::eUnsupported:
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case StringExtractorGDBRemote::eError:
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return true; // Accept unsupported or EXX as valid responses
|
|
|
|
case StringExtractorGDBRemote::eOK:
|
|
case StringExtractorGDBRemote::eAck:
|
|
case StringExtractorGDBRemote::eNack:
|
|
break;
|
|
|
|
case StringExtractorGDBRemote::eResponse:
|
|
// JSON that is returned in from JSON query packets is currently always
|
|
// either a dictionary which starts with a '{', or an array which starts
|
|
// with a '['. This is a quick validator to just make sure the response
|
|
// could be valid JSON without having to validate all of the
|
|
// JSON content.
|
|
switch (response.GetStringRef()[0]) {
|
|
case '{':
|
|
return true;
|
|
case '[':
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
ASCIIHexBytesResponseValidator(void *,
|
|
const StringExtractorGDBRemote &response) {
|
|
switch (response.GetResponseType()) {
|
|
case StringExtractorGDBRemote::eUnsupported:
|
|
case StringExtractorGDBRemote::eError:
|
|
return true; // Accept unsupported or EXX as valid responses
|
|
|
|
case StringExtractorGDBRemote::eOK:
|
|
case StringExtractorGDBRemote::eAck:
|
|
case StringExtractorGDBRemote::eNack:
|
|
break;
|
|
|
|
case StringExtractorGDBRemote::eResponse: {
|
|
uint32_t valid_count = 0;
|
|
for (const char ch : response.GetStringRef()) {
|
|
if (!isxdigit(ch)) {
|
|
return false;
|
|
}
|
|
if (++valid_count >= 16)
|
|
break; // Don't validate all the characters in case the packet is very
|
|
// large
|
|
}
|
|
return true;
|
|
} break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void StringExtractorGDBRemote::CopyResponseValidator(
|
|
const StringExtractorGDBRemote &rhs) {
|
|
m_validator = rhs.m_validator;
|
|
m_validator_baton = rhs.m_validator_baton;
|
|
}
|
|
|
|
void StringExtractorGDBRemote::SetResponseValidator(
|
|
ResponseValidatorCallback callback, void *baton) {
|
|
m_validator = callback;
|
|
m_validator_baton = baton;
|
|
}
|
|
|
|
void StringExtractorGDBRemote::SetResponseValidatorToOKErrorNotSupported() {
|
|
m_validator = OKErrorNotSupportedResponseValidator;
|
|
m_validator_baton = nullptr;
|
|
}
|
|
|
|
void StringExtractorGDBRemote::SetResponseValidatorToASCIIHexBytes() {
|
|
m_validator = ASCIIHexBytesResponseValidator;
|
|
m_validator_baton = nullptr;
|
|
}
|
|
|
|
void StringExtractorGDBRemote::SetResponseValidatorToJSON() {
|
|
m_validator = JSONResponseValidator;
|
|
m_validator_baton = nullptr;
|
|
}
|
|
|
|
bool StringExtractorGDBRemote::ValidateResponse() const {
|
|
// If we have a validator callback, try to validate the callback
|
|
if (m_validator)
|
|
return m_validator(m_validator_baton, *this);
|
|
else
|
|
return true; // No validator, so response is valid
|
|
}
|