1 //===-- GDBRemoteCommunicationServerCommon.cpp ------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "GDBRemoteCommunicationServerCommon.h"
10 
11 #include <errno.h>
12 
13 #ifdef __APPLE__
14 #include <TargetConditionals.h>
15 #endif
16 
17 #include <chrono>
18 #include <cstring>
19 
20 #include "lldb/Core/ModuleSpec.h"
21 #include "lldb/Host/Config.h"
22 #include "lldb/Host/File.h"
23 #include "lldb/Host/FileAction.h"
24 #include "lldb/Host/FileSystem.h"
25 #include "lldb/Host/Host.h"
26 #include "lldb/Host/HostInfo.h"
27 #include "lldb/Host/SafeMachO.h"
28 #include "lldb/Interpreter/OptionArgParser.h"
29 #include "lldb/Symbol/ObjectFile.h"
30 #include "lldb/Target/Platform.h"
31 #include "lldb/Utility/Endian.h"
32 #include "lldb/Utility/GDBRemote.h"
33 #include "lldb/Utility/Log.h"
34 #include "lldb/Utility/StreamString.h"
35 #include "lldb/Utility/StructuredData.h"
36 #include "llvm/ADT/StringSwitch.h"
37 #include "llvm/ADT/Triple.h"
38 #include "llvm/Support/JSON.h"
39 
40 #include "ProcessGDBRemoteLog.h"
41 #include "lldb/Utility/StringExtractorGDBRemote.h"
42 
43 #ifdef __ANDROID__
44 #include "lldb/Host/android/HostInfoAndroid.h"
45 #endif
46 
47 
48 using namespace lldb;
49 using namespace lldb_private::process_gdb_remote;
50 using namespace lldb_private;
51 
52 #ifdef __ANDROID__
53 const static uint32_t g_default_packet_timeout_sec = 20; // seconds
54 #else
55 const static uint32_t g_default_packet_timeout_sec = 0; // not specified
56 #endif
57 
58 // GDBRemoteCommunicationServerCommon constructor
59 GDBRemoteCommunicationServerCommon::GDBRemoteCommunicationServerCommon(
60     const char *comm_name, const char *listener_name)
61     : GDBRemoteCommunicationServer(comm_name, listener_name),
62       m_process_launch_info(), m_process_launch_error(), m_proc_infos(),
63       m_proc_infos_index(0), m_thread_suffix_supported(false),
64       m_list_threads_in_stop_reply(false) {
65   RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_A,
66                                 &GDBRemoteCommunicationServerCommon::Handle_A);
67   RegisterMemberFunctionHandler(
68       StringExtractorGDBRemote::eServerPacketType_QEnvironment,
69       &GDBRemoteCommunicationServerCommon::Handle_QEnvironment);
70   RegisterMemberFunctionHandler(
71       StringExtractorGDBRemote::eServerPacketType_QEnvironmentHexEncoded,
72       &GDBRemoteCommunicationServerCommon::Handle_QEnvironmentHexEncoded);
73   RegisterMemberFunctionHandler(
74       StringExtractorGDBRemote::eServerPacketType_qfProcessInfo,
75       &GDBRemoteCommunicationServerCommon::Handle_qfProcessInfo);
76   RegisterMemberFunctionHandler(
77       StringExtractorGDBRemote::eServerPacketType_qGroupName,
78       &GDBRemoteCommunicationServerCommon::Handle_qGroupName);
79   RegisterMemberFunctionHandler(
80       StringExtractorGDBRemote::eServerPacketType_qHostInfo,
81       &GDBRemoteCommunicationServerCommon::Handle_qHostInfo);
82   RegisterMemberFunctionHandler(
83       StringExtractorGDBRemote::eServerPacketType_QLaunchArch,
84       &GDBRemoteCommunicationServerCommon::Handle_QLaunchArch);
85   RegisterMemberFunctionHandler(
86       StringExtractorGDBRemote::eServerPacketType_qLaunchSuccess,
87       &GDBRemoteCommunicationServerCommon::Handle_qLaunchSuccess);
88   RegisterMemberFunctionHandler(
89       StringExtractorGDBRemote::eServerPacketType_QListThreadsInStopReply,
90       &GDBRemoteCommunicationServerCommon::Handle_QListThreadsInStopReply);
91   RegisterMemberFunctionHandler(
92       StringExtractorGDBRemote::eServerPacketType_qEcho,
93       &GDBRemoteCommunicationServerCommon::Handle_qEcho);
94   RegisterMemberFunctionHandler(
95       StringExtractorGDBRemote::eServerPacketType_qModuleInfo,
96       &GDBRemoteCommunicationServerCommon::Handle_qModuleInfo);
97   RegisterMemberFunctionHandler(
98       StringExtractorGDBRemote::eServerPacketType_jModulesInfo,
99       &GDBRemoteCommunicationServerCommon::Handle_jModulesInfo);
100   RegisterMemberFunctionHandler(
101       StringExtractorGDBRemote::eServerPacketType_qPlatform_chmod,
102       &GDBRemoteCommunicationServerCommon::Handle_qPlatform_chmod);
103   RegisterMemberFunctionHandler(
104       StringExtractorGDBRemote::eServerPacketType_qPlatform_mkdir,
105       &GDBRemoteCommunicationServerCommon::Handle_qPlatform_mkdir);
106   RegisterMemberFunctionHandler(
107       StringExtractorGDBRemote::eServerPacketType_qPlatform_shell,
108       &GDBRemoteCommunicationServerCommon::Handle_qPlatform_shell);
109   RegisterMemberFunctionHandler(
110       StringExtractorGDBRemote::eServerPacketType_qProcessInfoPID,
111       &GDBRemoteCommunicationServerCommon::Handle_qProcessInfoPID);
112   RegisterMemberFunctionHandler(
113       StringExtractorGDBRemote::eServerPacketType_QSetDetachOnError,
114       &GDBRemoteCommunicationServerCommon::Handle_QSetDetachOnError);
115   RegisterMemberFunctionHandler(
116       StringExtractorGDBRemote::eServerPacketType_QSetSTDERR,
117       &GDBRemoteCommunicationServerCommon::Handle_QSetSTDERR);
118   RegisterMemberFunctionHandler(
119       StringExtractorGDBRemote::eServerPacketType_QSetSTDIN,
120       &GDBRemoteCommunicationServerCommon::Handle_QSetSTDIN);
121   RegisterMemberFunctionHandler(
122       StringExtractorGDBRemote::eServerPacketType_QSetSTDOUT,
123       &GDBRemoteCommunicationServerCommon::Handle_QSetSTDOUT);
124   RegisterMemberFunctionHandler(
125       StringExtractorGDBRemote::eServerPacketType_qSpeedTest,
126       &GDBRemoteCommunicationServerCommon::Handle_qSpeedTest);
127   RegisterMemberFunctionHandler(
128       StringExtractorGDBRemote::eServerPacketType_qsProcessInfo,
129       &GDBRemoteCommunicationServerCommon::Handle_qsProcessInfo);
130   RegisterMemberFunctionHandler(
131       StringExtractorGDBRemote::eServerPacketType_QStartNoAckMode,
132       &GDBRemoteCommunicationServerCommon::Handle_QStartNoAckMode);
133   RegisterMemberFunctionHandler(
134       StringExtractorGDBRemote::eServerPacketType_qSupported,
135       &GDBRemoteCommunicationServerCommon::Handle_qSupported);
136   RegisterMemberFunctionHandler(
137       StringExtractorGDBRemote::eServerPacketType_QThreadSuffixSupported,
138       &GDBRemoteCommunicationServerCommon::Handle_QThreadSuffixSupported);
139   RegisterMemberFunctionHandler(
140       StringExtractorGDBRemote::eServerPacketType_qUserName,
141       &GDBRemoteCommunicationServerCommon::Handle_qUserName);
142   RegisterMemberFunctionHandler(
143       StringExtractorGDBRemote::eServerPacketType_vFile_close,
144       &GDBRemoteCommunicationServerCommon::Handle_vFile_Close);
145   RegisterMemberFunctionHandler(
146       StringExtractorGDBRemote::eServerPacketType_vFile_exists,
147       &GDBRemoteCommunicationServerCommon::Handle_vFile_Exists);
148   RegisterMemberFunctionHandler(
149       StringExtractorGDBRemote::eServerPacketType_vFile_md5,
150       &GDBRemoteCommunicationServerCommon::Handle_vFile_MD5);
151   RegisterMemberFunctionHandler(
152       StringExtractorGDBRemote::eServerPacketType_vFile_mode,
153       &GDBRemoteCommunicationServerCommon::Handle_vFile_Mode);
154   RegisterMemberFunctionHandler(
155       StringExtractorGDBRemote::eServerPacketType_vFile_open,
156       &GDBRemoteCommunicationServerCommon::Handle_vFile_Open);
157   RegisterMemberFunctionHandler(
158       StringExtractorGDBRemote::eServerPacketType_vFile_pread,
159       &GDBRemoteCommunicationServerCommon::Handle_vFile_pRead);
160   RegisterMemberFunctionHandler(
161       StringExtractorGDBRemote::eServerPacketType_vFile_pwrite,
162       &GDBRemoteCommunicationServerCommon::Handle_vFile_pWrite);
163   RegisterMemberFunctionHandler(
164       StringExtractorGDBRemote::eServerPacketType_vFile_size,
165       &GDBRemoteCommunicationServerCommon::Handle_vFile_Size);
166   RegisterMemberFunctionHandler(
167       StringExtractorGDBRemote::eServerPacketType_vFile_stat,
168       &GDBRemoteCommunicationServerCommon::Handle_vFile_Stat);
169   RegisterMemberFunctionHandler(
170       StringExtractorGDBRemote::eServerPacketType_vFile_symlink,
171       &GDBRemoteCommunicationServerCommon::Handle_vFile_symlink);
172   RegisterMemberFunctionHandler(
173       StringExtractorGDBRemote::eServerPacketType_vFile_unlink,
174       &GDBRemoteCommunicationServerCommon::Handle_vFile_unlink);
175 }
176 
177 // Destructor
178 GDBRemoteCommunicationServerCommon::~GDBRemoteCommunicationServerCommon() {}
179 
180 GDBRemoteCommunication::PacketResult
181 GDBRemoteCommunicationServerCommon::Handle_qHostInfo(
182     StringExtractorGDBRemote &packet) {
183   StreamString response;
184 
185   // $cputype:16777223;cpusubtype:3;ostype:Darwin;vendor:apple;endian:little;ptrsize:8;#00
186 
187   ArchSpec host_arch(HostInfo::GetArchitecture());
188   const llvm::Triple &host_triple = host_arch.GetTriple();
189   response.PutCString("triple:");
190   response.PutStringAsRawHex8(host_triple.getTriple());
191   response.Printf(";ptrsize:%u;", host_arch.GetAddressByteSize());
192 
193   const char *distribution_id = host_arch.GetDistributionId().AsCString();
194   if (distribution_id) {
195     response.PutCString("distribution_id:");
196     response.PutStringAsRawHex8(distribution_id);
197     response.PutCString(";");
198   }
199 
200 #if defined(__APPLE__)
201   // For parity with debugserver, we'll include the vendor key.
202   response.PutCString("vendor:apple;");
203 
204   // Send out MachO info.
205   uint32_t cpu = host_arch.GetMachOCPUType();
206   uint32_t sub = host_arch.GetMachOCPUSubType();
207   if (cpu != LLDB_INVALID_CPUTYPE)
208     response.Printf("cputype:%u;", cpu);
209   if (sub != LLDB_INVALID_CPUTYPE)
210     response.Printf("cpusubtype:%u;", sub);
211 
212   if (cpu == llvm::MachO::CPU_TYPE_ARM || cpu == llvm::MachO::CPU_TYPE_ARM64) {
213 // Indicate the OS type.
214 #if defined(TARGET_OS_TV) && TARGET_OS_TV == 1
215     response.PutCString("ostype:tvos;");
216 #elif defined(TARGET_OS_WATCH) && TARGET_OS_WATCH == 1
217     response.PutCString("ostype:watchos;");
218 #elif defined(TARGET_OS_BRIDGE) && TARGET_OS_BRIDGE == 1
219     response.PutCString("ostype:bridgeos;");
220 #else
221     response.PutCString("ostype:ios;");
222 #endif
223 
224     // On arm, we use "synchronous" watchpoints which means the exception is
225     // delivered before the instruction executes.
226     response.PutCString("watchpoint_exceptions_received:before;");
227   } else {
228     response.PutCString("ostype:macosx;");
229     response.Printf("watchpoint_exceptions_received:after;");
230   }
231 
232 #else
233   if (host_arch.GetMachine() == llvm::Triple::aarch64 ||
234       host_arch.GetMachine() == llvm::Triple::aarch64_be ||
235       host_arch.GetMachine() == llvm::Triple::arm ||
236       host_arch.GetMachine() == llvm::Triple::armeb || host_arch.IsMIPS())
237     response.Printf("watchpoint_exceptions_received:before;");
238   else
239     response.Printf("watchpoint_exceptions_received:after;");
240 #endif
241 
242   switch (endian::InlHostByteOrder()) {
243   case eByteOrderBig:
244     response.PutCString("endian:big;");
245     break;
246   case eByteOrderLittle:
247     response.PutCString("endian:little;");
248     break;
249   case eByteOrderPDP:
250     response.PutCString("endian:pdp;");
251     break;
252   default:
253     response.PutCString("endian:unknown;");
254     break;
255   }
256 
257   llvm::VersionTuple version = HostInfo::GetOSVersion();
258   if (!version.empty()) {
259     response.Format("os_version:{0}", version.getAsString());
260     response.PutChar(';');
261   }
262 
263 #if defined(__APPLE__)
264   llvm::VersionTuple maccatalyst_version = HostInfo::GetMacCatalystVersion();
265   if (!maccatalyst_version.empty()) {
266     response.Format("maccatalyst_version:{0}",
267                     maccatalyst_version.getAsString());
268     response.PutChar(';');
269   }
270 #endif
271 
272   std::string s;
273   if (HostInfo::GetOSBuildString(s)) {
274     response.PutCString("os_build:");
275     response.PutStringAsRawHex8(s);
276     response.PutChar(';');
277   }
278   if (HostInfo::GetOSKernelDescription(s)) {
279     response.PutCString("os_kernel:");
280     response.PutStringAsRawHex8(s);
281     response.PutChar(';');
282   }
283 
284 #if defined(__APPLE__)
285 
286 #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
287   // For iOS devices, we are connected through a USB Mux so we never pretend to
288   // actually have a hostname as far as the remote lldb that is connecting to
289   // this lldb-platform is concerned
290   response.PutCString("hostname:");
291   response.PutStringAsRawHex8("127.0.0.1");
292   response.PutChar(';');
293 #else  // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
294   if (HostInfo::GetHostname(s)) {
295     response.PutCString("hostname:");
296     response.PutStringAsRawHex8(s);
297     response.PutChar(';');
298   }
299 #endif // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
300 
301 #else  // #if defined(__APPLE__)
302   if (HostInfo::GetHostname(s)) {
303     response.PutCString("hostname:");
304     response.PutStringAsRawHex8(s);
305     response.PutChar(';');
306   }
307 #endif // #if defined(__APPLE__)
308 
309   if (g_default_packet_timeout_sec > 0)
310     response.Printf("default_packet_timeout:%u;", g_default_packet_timeout_sec);
311 
312   return SendPacketNoLock(response.GetString());
313 }
314 
315 GDBRemoteCommunication::PacketResult
316 GDBRemoteCommunicationServerCommon::Handle_qProcessInfoPID(
317     StringExtractorGDBRemote &packet) {
318   // Packet format: "qProcessInfoPID:%i" where %i is the pid
319   packet.SetFilePos(::strlen("qProcessInfoPID:"));
320   lldb::pid_t pid = packet.GetU32(LLDB_INVALID_PROCESS_ID);
321   if (pid != LLDB_INVALID_PROCESS_ID) {
322     ProcessInstanceInfo proc_info;
323     if (Host::GetProcessInfo(pid, proc_info)) {
324       StreamString response;
325       CreateProcessInfoResponse(proc_info, response);
326       return SendPacketNoLock(response.GetString());
327     }
328   }
329   return SendErrorResponse(1);
330 }
331 
332 GDBRemoteCommunication::PacketResult
333 GDBRemoteCommunicationServerCommon::Handle_qfProcessInfo(
334     StringExtractorGDBRemote &packet) {
335   m_proc_infos_index = 0;
336   m_proc_infos.Clear();
337 
338   ProcessInstanceInfoMatch match_info;
339   packet.SetFilePos(::strlen("qfProcessInfo"));
340   if (packet.GetChar() == ':') {
341     llvm::StringRef key;
342     llvm::StringRef value;
343     while (packet.GetNameColonValue(key, value)) {
344       bool success = true;
345       if (key.equals("name")) {
346         StringExtractor extractor(value);
347         std::string file;
348         extractor.GetHexByteString(file);
349         match_info.GetProcessInfo().GetExecutableFile().SetFile(
350             file, FileSpec::Style::native);
351       } else if (key.equals("name_match")) {
352         NameMatch name_match = llvm::StringSwitch<NameMatch>(value)
353                                    .Case("equals", NameMatch::Equals)
354                                    .Case("starts_with", NameMatch::StartsWith)
355                                    .Case("ends_with", NameMatch::EndsWith)
356                                    .Case("contains", NameMatch::Contains)
357                                    .Case("regex", NameMatch::RegularExpression)
358                                    .Default(NameMatch::Ignore);
359         match_info.SetNameMatchType(name_match);
360         if (name_match == NameMatch::Ignore)
361           return SendErrorResponse(2);
362       } else if (key.equals("pid")) {
363         lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
364         if (value.getAsInteger(0, pid))
365           return SendErrorResponse(2);
366         match_info.GetProcessInfo().SetProcessID(pid);
367       } else if (key.equals("parent_pid")) {
368         lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
369         if (value.getAsInteger(0, pid))
370           return SendErrorResponse(2);
371         match_info.GetProcessInfo().SetParentProcessID(pid);
372       } else if (key.equals("uid")) {
373         uint32_t uid = UINT32_MAX;
374         if (value.getAsInteger(0, uid))
375           return SendErrorResponse(2);
376         match_info.GetProcessInfo().SetUserID(uid);
377       } else if (key.equals("gid")) {
378         uint32_t gid = UINT32_MAX;
379         if (value.getAsInteger(0, gid))
380           return SendErrorResponse(2);
381         match_info.GetProcessInfo().SetGroupID(gid);
382       } else if (key.equals("euid")) {
383         uint32_t uid = UINT32_MAX;
384         if (value.getAsInteger(0, uid))
385           return SendErrorResponse(2);
386         match_info.GetProcessInfo().SetEffectiveUserID(uid);
387       } else if (key.equals("egid")) {
388         uint32_t gid = UINT32_MAX;
389         if (value.getAsInteger(0, gid))
390           return SendErrorResponse(2);
391         match_info.GetProcessInfo().SetEffectiveGroupID(gid);
392       } else if (key.equals("all_users")) {
393         match_info.SetMatchAllUsers(
394             OptionArgParser::ToBoolean(value, false, &success));
395       } else if (key.equals("triple")) {
396         match_info.GetProcessInfo().GetArchitecture() =
397             HostInfo::GetAugmentedArchSpec(value);
398       } else {
399         success = false;
400       }
401 
402       if (!success)
403         return SendErrorResponse(2);
404     }
405   }
406 
407   if (Host::FindProcesses(match_info, m_proc_infos)) {
408     // We found something, return the first item by calling the get subsequent
409     // process info packet handler...
410     return Handle_qsProcessInfo(packet);
411   }
412   return SendErrorResponse(3);
413 }
414 
415 GDBRemoteCommunication::PacketResult
416 GDBRemoteCommunicationServerCommon::Handle_qsProcessInfo(
417     StringExtractorGDBRemote &packet) {
418   if (m_proc_infos_index < m_proc_infos.GetSize()) {
419     StreamString response;
420     CreateProcessInfoResponse(
421         m_proc_infos.GetProcessInfoAtIndex(m_proc_infos_index), response);
422     ++m_proc_infos_index;
423     return SendPacketNoLock(response.GetString());
424   }
425   return SendErrorResponse(4);
426 }
427 
428 GDBRemoteCommunication::PacketResult
429 GDBRemoteCommunicationServerCommon::Handle_qUserName(
430     StringExtractorGDBRemote &packet) {
431 #if !defined(LLDB_DISABLE_POSIX)
432   Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
433   LLDB_LOGF(log, "GDBRemoteCommunicationServerCommon::%s begin", __FUNCTION__);
434 
435   // Packet format: "qUserName:%i" where %i is the uid
436   packet.SetFilePos(::strlen("qUserName:"));
437   uint32_t uid = packet.GetU32(UINT32_MAX);
438   if (uid != UINT32_MAX) {
439     if (llvm::Optional<llvm::StringRef> name =
440             HostInfo::GetUserIDResolver().GetUserName(uid)) {
441       StreamString response;
442       response.PutStringAsRawHex8(*name);
443       return SendPacketNoLock(response.GetString());
444     }
445   }
446   LLDB_LOGF(log, "GDBRemoteCommunicationServerCommon::%s end", __FUNCTION__);
447 #endif
448   return SendErrorResponse(5);
449 }
450 
451 GDBRemoteCommunication::PacketResult
452 GDBRemoteCommunicationServerCommon::Handle_qGroupName(
453     StringExtractorGDBRemote &packet) {
454 #if !defined(LLDB_DISABLE_POSIX)
455   // Packet format: "qGroupName:%i" where %i is the gid
456   packet.SetFilePos(::strlen("qGroupName:"));
457   uint32_t gid = packet.GetU32(UINT32_MAX);
458   if (gid != UINT32_MAX) {
459     if (llvm::Optional<llvm::StringRef> name =
460             HostInfo::GetUserIDResolver().GetGroupName(gid)) {
461       StreamString response;
462       response.PutStringAsRawHex8(*name);
463       return SendPacketNoLock(response.GetString());
464     }
465   }
466 #endif
467   return SendErrorResponse(6);
468 }
469 
470 GDBRemoteCommunication::PacketResult
471 GDBRemoteCommunicationServerCommon::Handle_qSpeedTest(
472     StringExtractorGDBRemote &packet) {
473   packet.SetFilePos(::strlen("qSpeedTest:"));
474 
475   llvm::StringRef key;
476   llvm::StringRef value;
477   bool success = packet.GetNameColonValue(key, value);
478   if (success && key.equals("response_size")) {
479     uint32_t response_size = 0;
480     if (!value.getAsInteger(0, response_size)) {
481       if (response_size == 0)
482         return SendOKResponse();
483       StreamString response;
484       uint32_t bytes_left = response_size;
485       response.PutCString("data:");
486       while (bytes_left > 0) {
487         if (bytes_left >= 26) {
488           response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
489           bytes_left -= 26;
490         } else {
491           response.Printf("%*.*s;", bytes_left, bytes_left,
492                           "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
493           bytes_left = 0;
494         }
495       }
496       return SendPacketNoLock(response.GetString());
497     }
498   }
499   return SendErrorResponse(7);
500 }
501 
502 GDBRemoteCommunication::PacketResult
503 GDBRemoteCommunicationServerCommon::Handle_vFile_Open(
504     StringExtractorGDBRemote &packet) {
505   packet.SetFilePos(::strlen("vFile:open:"));
506   std::string path;
507   packet.GetHexByteStringTerminatedBy(path, ',');
508   if (!path.empty()) {
509     if (packet.GetChar() == ',') {
510       // FIXME
511       // The flag values for OpenOptions do not match the values used by GDB
512       // * https://sourceware.org/gdb/onlinedocs/gdb/Open-Flags.html#Open-Flags
513       // * rdar://problem/46788934
514       auto flags = File::OpenOptions(packet.GetHexMaxU32(false, 0));
515       if (packet.GetChar() == ',') {
516         mode_t mode = packet.GetHexMaxU32(false, 0600);
517         FileSpec path_spec(path);
518         FileSystem::Instance().Resolve(path_spec);
519         // Do not close fd.
520         auto file = FileSystem::Instance().Open(path_spec, flags, mode, false);
521 
522         int save_errno = 0;
523         int descriptor = File::kInvalidDescriptor;
524         if (file) {
525           descriptor = file.get()->GetDescriptor();
526         } else {
527           std::error_code code = errorToErrorCode(file.takeError());
528           if (code.category() == std::system_category()) {
529             save_errno = code.value();
530           }
531         }
532 
533         StreamString response;
534         response.PutChar('F');
535         response.Printf("%i", descriptor);
536         if (save_errno)
537           response.Printf(",%i", save_errno);
538         return SendPacketNoLock(response.GetString());
539       }
540     }
541   }
542   return SendErrorResponse(18);
543 }
544 
545 GDBRemoteCommunication::PacketResult
546 GDBRemoteCommunicationServerCommon::Handle_vFile_Close(
547     StringExtractorGDBRemote &packet) {
548   packet.SetFilePos(::strlen("vFile:close:"));
549   int fd = packet.GetS32(-1);
550   int err = -1;
551   int save_errno = 0;
552   if (fd >= 0) {
553     NativeFile file(fd, File::OpenOptions(0), true);
554     Status error = file.Close();
555     err = 0;
556     save_errno = error.GetError();
557   } else {
558     save_errno = EINVAL;
559   }
560   StreamString response;
561   response.PutChar('F');
562   response.Printf("%i", err);
563   if (save_errno)
564     response.Printf(",%i", save_errno);
565   return SendPacketNoLock(response.GetString());
566 }
567 
568 GDBRemoteCommunication::PacketResult
569 GDBRemoteCommunicationServerCommon::Handle_vFile_pRead(
570     StringExtractorGDBRemote &packet) {
571   StreamGDBRemote response;
572   packet.SetFilePos(::strlen("vFile:pread:"));
573   int fd = packet.GetS32(-1);
574   if (packet.GetChar() == ',') {
575     size_t count = packet.GetU64(SIZE_MAX);
576     if (packet.GetChar() == ',') {
577       off_t offset = packet.GetU64(UINT32_MAX);
578       if (count == SIZE_MAX) {
579         response.Printf("F-1:%i", EINVAL);
580         return SendPacketNoLock(response.GetString());
581       }
582 
583       std::string buffer(count, 0);
584       NativeFile file(fd, File::eOpenOptionRead, false);
585       Status error = file.Read(static_cast<void *>(&buffer[0]), count, offset);
586       const ssize_t bytes_read = error.Success() ? count : -1;
587       const int save_errno = error.GetError();
588       response.PutChar('F');
589       response.Printf("%zi", bytes_read);
590       if (save_errno)
591         response.Printf(",%i", save_errno);
592       else {
593         response.PutChar(';');
594         response.PutEscapedBytes(&buffer[0], bytes_read);
595       }
596       return SendPacketNoLock(response.GetString());
597     }
598   }
599   return SendErrorResponse(21);
600 }
601 
602 GDBRemoteCommunication::PacketResult
603 GDBRemoteCommunicationServerCommon::Handle_vFile_pWrite(
604     StringExtractorGDBRemote &packet) {
605   packet.SetFilePos(::strlen("vFile:pwrite:"));
606 
607   StreamGDBRemote response;
608   response.PutChar('F');
609 
610   int fd = packet.GetU32(UINT32_MAX);
611   if (packet.GetChar() == ',') {
612     off_t offset = packet.GetU64(UINT32_MAX);
613     if (packet.GetChar() == ',') {
614       std::string buffer;
615       if (packet.GetEscapedBinaryData(buffer)) {
616         NativeFile file(fd, File::eOpenOptionWrite, false);
617         size_t count = buffer.size();
618         Status error =
619             file.Write(static_cast<const void *>(&buffer[0]), count, offset);
620         const ssize_t bytes_written = error.Success() ? count : -1;
621         const int save_errno = error.GetError();
622         response.Printf("%zi", bytes_written);
623         if (save_errno)
624           response.Printf(",%i", save_errno);
625       } else {
626         response.Printf("-1,%i", EINVAL);
627       }
628       return SendPacketNoLock(response.GetString());
629     }
630   }
631   return SendErrorResponse(27);
632 }
633 
634 GDBRemoteCommunication::PacketResult
635 GDBRemoteCommunicationServerCommon::Handle_vFile_Size(
636     StringExtractorGDBRemote &packet) {
637   packet.SetFilePos(::strlen("vFile:size:"));
638   std::string path;
639   packet.GetHexByteString(path);
640   if (!path.empty()) {
641     uint64_t Size;
642     if (llvm::sys::fs::file_size(path, Size))
643       return SendErrorResponse(5);
644     StreamString response;
645     response.PutChar('F');
646     response.PutHex64(Size);
647     if (Size == UINT64_MAX) {
648       response.PutChar(',');
649       response.PutHex64(Size); // TODO: replace with Host::GetSyswideErrorCode()
650     }
651     return SendPacketNoLock(response.GetString());
652   }
653   return SendErrorResponse(22);
654 }
655 
656 GDBRemoteCommunication::PacketResult
657 GDBRemoteCommunicationServerCommon::Handle_vFile_Mode(
658     StringExtractorGDBRemote &packet) {
659   packet.SetFilePos(::strlen("vFile:mode:"));
660   std::string path;
661   packet.GetHexByteString(path);
662   if (!path.empty()) {
663     FileSpec file_spec(path);
664     FileSystem::Instance().Resolve(file_spec);
665     std::error_code ec;
666     const uint32_t mode = FileSystem::Instance().GetPermissions(file_spec, ec);
667     StreamString response;
668     response.Printf("F%u", mode);
669     if (mode == 0 || ec)
670       response.Printf(",%i", (int)Status(ec).GetError());
671     return SendPacketNoLock(response.GetString());
672   }
673   return SendErrorResponse(23);
674 }
675 
676 GDBRemoteCommunication::PacketResult
677 GDBRemoteCommunicationServerCommon::Handle_vFile_Exists(
678     StringExtractorGDBRemote &packet) {
679   packet.SetFilePos(::strlen("vFile:exists:"));
680   std::string path;
681   packet.GetHexByteString(path);
682   if (!path.empty()) {
683     bool retcode = llvm::sys::fs::exists(path);
684     StreamString response;
685     response.PutChar('F');
686     response.PutChar(',');
687     if (retcode)
688       response.PutChar('1');
689     else
690       response.PutChar('0');
691     return SendPacketNoLock(response.GetString());
692   }
693   return SendErrorResponse(24);
694 }
695 
696 GDBRemoteCommunication::PacketResult
697 GDBRemoteCommunicationServerCommon::Handle_vFile_symlink(
698     StringExtractorGDBRemote &packet) {
699   packet.SetFilePos(::strlen("vFile:symlink:"));
700   std::string dst, src;
701   packet.GetHexByteStringTerminatedBy(dst, ',');
702   packet.GetChar(); // Skip ',' char
703   packet.GetHexByteString(src);
704 
705   FileSpec src_spec(src);
706   FileSystem::Instance().Resolve(src_spec);
707   Status error = FileSystem::Instance().Symlink(src_spec, FileSpec(dst));
708 
709   StreamString response;
710   response.Printf("F%u,%u", error.GetError(), error.GetError());
711   return SendPacketNoLock(response.GetString());
712 }
713 
714 GDBRemoteCommunication::PacketResult
715 GDBRemoteCommunicationServerCommon::Handle_vFile_unlink(
716     StringExtractorGDBRemote &packet) {
717   packet.SetFilePos(::strlen("vFile:unlink:"));
718   std::string path;
719   packet.GetHexByteString(path);
720   Status error(llvm::sys::fs::remove(path));
721   StreamString response;
722   response.Printf("F%u,%u", error.GetError(), error.GetError());
723   return SendPacketNoLock(response.GetString());
724 }
725 
726 GDBRemoteCommunication::PacketResult
727 GDBRemoteCommunicationServerCommon::Handle_qPlatform_shell(
728     StringExtractorGDBRemote &packet) {
729   packet.SetFilePos(::strlen("qPlatform_shell:"));
730   std::string path;
731   std::string working_dir;
732   packet.GetHexByteStringTerminatedBy(path, ',');
733   if (!path.empty()) {
734     if (packet.GetChar() == ',') {
735       // FIXME: add timeout to qPlatform_shell packet
736       // uint32_t timeout = packet.GetHexMaxU32(false, 32);
737       if (packet.GetChar() == ',')
738         packet.GetHexByteString(working_dir);
739       int status, signo;
740       std::string output;
741       FileSpec working_spec(working_dir);
742       FileSystem::Instance().Resolve(working_spec);
743       Status err =
744           Host::RunShellCommand(path.c_str(), working_spec, &status, &signo,
745                                 &output, std::chrono::seconds(10));
746       StreamGDBRemote response;
747       if (err.Fail()) {
748         response.PutCString("F,");
749         response.PutHex32(UINT32_MAX);
750       } else {
751         response.PutCString("F,");
752         response.PutHex32(status);
753         response.PutChar(',');
754         response.PutHex32(signo);
755         response.PutChar(',');
756         response.PutEscapedBytes(output.c_str(), output.size());
757       }
758       return SendPacketNoLock(response.GetString());
759     }
760   }
761   return SendErrorResponse(24);
762 }
763 
764 GDBRemoteCommunication::PacketResult
765 GDBRemoteCommunicationServerCommon::Handle_vFile_Stat(
766     StringExtractorGDBRemote &packet) {
767   return SendUnimplementedResponse(
768       "GDBRemoteCommunicationServerCommon::Handle_vFile_Stat() unimplemented");
769 }
770 
771 GDBRemoteCommunication::PacketResult
772 GDBRemoteCommunicationServerCommon::Handle_vFile_MD5(
773     StringExtractorGDBRemote &packet) {
774   packet.SetFilePos(::strlen("vFile:MD5:"));
775   std::string path;
776   packet.GetHexByteString(path);
777   if (!path.empty()) {
778     StreamGDBRemote response;
779     auto Result = llvm::sys::fs::md5_contents(path);
780     if (!Result) {
781       response.PutCString("F,");
782       response.PutCString("x");
783     } else {
784       response.PutCString("F,");
785       response.PutHex64(Result->low());
786       response.PutHex64(Result->high());
787     }
788     return SendPacketNoLock(response.GetString());
789   }
790   return SendErrorResponse(25);
791 }
792 
793 GDBRemoteCommunication::PacketResult
794 GDBRemoteCommunicationServerCommon::Handle_qPlatform_mkdir(
795     StringExtractorGDBRemote &packet) {
796   packet.SetFilePos(::strlen("qPlatform_mkdir:"));
797   mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX);
798   if (packet.GetChar() == ',') {
799     std::string path;
800     packet.GetHexByteString(path);
801     Status error(llvm::sys::fs::create_directory(path, mode));
802 
803     StreamGDBRemote response;
804     response.Printf("F%u", error.GetError());
805 
806     return SendPacketNoLock(response.GetString());
807   }
808   return SendErrorResponse(20);
809 }
810 
811 GDBRemoteCommunication::PacketResult
812 GDBRemoteCommunicationServerCommon::Handle_qPlatform_chmod(
813     StringExtractorGDBRemote &packet) {
814   packet.SetFilePos(::strlen("qPlatform_chmod:"));
815 
816   auto perms =
817       static_cast<llvm::sys::fs::perms>(packet.GetHexMaxU32(false, UINT32_MAX));
818   if (packet.GetChar() == ',') {
819     std::string path;
820     packet.GetHexByteString(path);
821     Status error(llvm::sys::fs::setPermissions(path, perms));
822 
823     StreamGDBRemote response;
824     response.Printf("F%u", error.GetError());
825 
826     return SendPacketNoLock(response.GetString());
827   }
828   return SendErrorResponse(19);
829 }
830 
831 GDBRemoteCommunication::PacketResult
832 GDBRemoteCommunicationServerCommon::Handle_qSupported(
833     StringExtractorGDBRemote &packet) {
834   StreamGDBRemote response;
835 
836   // Features common to lldb-platform and llgs.
837   uint32_t max_packet_size = 128 * 1024; // 128KBytes is a reasonable max packet
838                                          // size--debugger can always use less
839   response.Printf("PacketSize=%x", max_packet_size);
840 
841   response.PutCString(";QStartNoAckMode+");
842   response.PutCString(";QThreadSuffixSupported+");
843   response.PutCString(";QListThreadsInStopReply+");
844   response.PutCString(";qEcho+");
845 #if defined(__linux__) || defined(__NetBSD__)
846   response.PutCString(";QPassSignals+");
847   response.PutCString(";qXfer:auxv:read+");
848   response.PutCString(";qXfer:libraries-svr4:read+");
849 #endif
850 
851   return SendPacketNoLock(response.GetString());
852 }
853 
854 GDBRemoteCommunication::PacketResult
855 GDBRemoteCommunicationServerCommon::Handle_QThreadSuffixSupported(
856     StringExtractorGDBRemote &packet) {
857   m_thread_suffix_supported = true;
858   return SendOKResponse();
859 }
860 
861 GDBRemoteCommunication::PacketResult
862 GDBRemoteCommunicationServerCommon::Handle_QListThreadsInStopReply(
863     StringExtractorGDBRemote &packet) {
864   m_list_threads_in_stop_reply = true;
865   return SendOKResponse();
866 }
867 
868 GDBRemoteCommunication::PacketResult
869 GDBRemoteCommunicationServerCommon::Handle_QSetDetachOnError(
870     StringExtractorGDBRemote &packet) {
871   packet.SetFilePos(::strlen("QSetDetachOnError:"));
872   if (packet.GetU32(0))
873     m_process_launch_info.GetFlags().Set(eLaunchFlagDetachOnError);
874   else
875     m_process_launch_info.GetFlags().Clear(eLaunchFlagDetachOnError);
876   return SendOKResponse();
877 }
878 
879 GDBRemoteCommunication::PacketResult
880 GDBRemoteCommunicationServerCommon::Handle_QStartNoAckMode(
881     StringExtractorGDBRemote &packet) {
882   // Send response first before changing m_send_acks to we ack this packet
883   PacketResult packet_result = SendOKResponse();
884   m_send_acks = false;
885   return packet_result;
886 }
887 
888 GDBRemoteCommunication::PacketResult
889 GDBRemoteCommunicationServerCommon::Handle_QSetSTDIN(
890     StringExtractorGDBRemote &packet) {
891   packet.SetFilePos(::strlen("QSetSTDIN:"));
892   FileAction file_action;
893   std::string path;
894   packet.GetHexByteString(path);
895   const bool read = true;
896   const bool write = false;
897   if (file_action.Open(STDIN_FILENO, FileSpec(path), read, write)) {
898     m_process_launch_info.AppendFileAction(file_action);
899     return SendOKResponse();
900   }
901   return SendErrorResponse(15);
902 }
903 
904 GDBRemoteCommunication::PacketResult
905 GDBRemoteCommunicationServerCommon::Handle_QSetSTDOUT(
906     StringExtractorGDBRemote &packet) {
907   packet.SetFilePos(::strlen("QSetSTDOUT:"));
908   FileAction file_action;
909   std::string path;
910   packet.GetHexByteString(path);
911   const bool read = false;
912   const bool write = true;
913   if (file_action.Open(STDOUT_FILENO, FileSpec(path), read, write)) {
914     m_process_launch_info.AppendFileAction(file_action);
915     return SendOKResponse();
916   }
917   return SendErrorResponse(16);
918 }
919 
920 GDBRemoteCommunication::PacketResult
921 GDBRemoteCommunicationServerCommon::Handle_QSetSTDERR(
922     StringExtractorGDBRemote &packet) {
923   packet.SetFilePos(::strlen("QSetSTDERR:"));
924   FileAction file_action;
925   std::string path;
926   packet.GetHexByteString(path);
927   const bool read = false;
928   const bool write = true;
929   if (file_action.Open(STDERR_FILENO, FileSpec(path), read, write)) {
930     m_process_launch_info.AppendFileAction(file_action);
931     return SendOKResponse();
932   }
933   return SendErrorResponse(17);
934 }
935 
936 GDBRemoteCommunication::PacketResult
937 GDBRemoteCommunicationServerCommon::Handle_qLaunchSuccess(
938     StringExtractorGDBRemote &packet) {
939   if (m_process_launch_error.Success())
940     return SendOKResponse();
941   StreamString response;
942   response.PutChar('E');
943   response.PutCString(m_process_launch_error.AsCString("<unknown error>"));
944   return SendPacketNoLock(response.GetString());
945 }
946 
947 GDBRemoteCommunication::PacketResult
948 GDBRemoteCommunicationServerCommon::Handle_QEnvironment(
949     StringExtractorGDBRemote &packet) {
950   packet.SetFilePos(::strlen("QEnvironment:"));
951   const uint32_t bytes_left = packet.GetBytesLeft();
952   if (bytes_left > 0) {
953     m_process_launch_info.GetEnvironment().insert(packet.Peek());
954     return SendOKResponse();
955   }
956   return SendErrorResponse(12);
957 }
958 
959 GDBRemoteCommunication::PacketResult
960 GDBRemoteCommunicationServerCommon::Handle_QEnvironmentHexEncoded(
961     StringExtractorGDBRemote &packet) {
962   packet.SetFilePos(::strlen("QEnvironmentHexEncoded:"));
963   const uint32_t bytes_left = packet.GetBytesLeft();
964   if (bytes_left > 0) {
965     std::string str;
966     packet.GetHexByteString(str);
967     m_process_launch_info.GetEnvironment().insert(str);
968     return SendOKResponse();
969   }
970   return SendErrorResponse(12);
971 }
972 
973 GDBRemoteCommunication::PacketResult
974 GDBRemoteCommunicationServerCommon::Handle_QLaunchArch(
975     StringExtractorGDBRemote &packet) {
976   packet.SetFilePos(::strlen("QLaunchArch:"));
977   const uint32_t bytes_left = packet.GetBytesLeft();
978   if (bytes_left > 0) {
979     const char *arch_triple = packet.Peek();
980     m_process_launch_info.SetArchitecture(
981         HostInfo::GetAugmentedArchSpec(arch_triple));
982     return SendOKResponse();
983   }
984   return SendErrorResponse(13);
985 }
986 
987 GDBRemoteCommunication::PacketResult
988 GDBRemoteCommunicationServerCommon::Handle_A(StringExtractorGDBRemote &packet) {
989   // The 'A' packet is the most over designed packet ever here with redundant
990   // argument indexes, redundant argument lengths and needed hex encoded
991   // argument string values. Really all that is needed is a comma separated hex
992   // encoded argument value list, but we will stay true to the documented
993   // version of the 'A' packet here...
994 
995   Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
996   int actual_arg_index = 0;
997 
998   packet.SetFilePos(1); // Skip the 'A'
999   bool success = true;
1000   while (success && packet.GetBytesLeft() > 0) {
1001     // Decode the decimal argument string length. This length is the number of
1002     // hex nibbles in the argument string value.
1003     const uint32_t arg_len = packet.GetU32(UINT32_MAX);
1004     if (arg_len == UINT32_MAX)
1005       success = false;
1006     else {
1007       // Make sure the argument hex string length is followed by a comma
1008       if (packet.GetChar() != ',')
1009         success = false;
1010       else {
1011         // Decode the argument index. We ignore this really because who would
1012         // really send down the arguments in a random order???
1013         const uint32_t arg_idx = packet.GetU32(UINT32_MAX);
1014         if (arg_idx == UINT32_MAX)
1015           success = false;
1016         else {
1017           // Make sure the argument index is followed by a comma
1018           if (packet.GetChar() != ',')
1019             success = false;
1020           else {
1021             // Decode the argument string value from hex bytes back into a UTF8
1022             // string and make sure the length matches the one supplied in the
1023             // packet
1024             std::string arg;
1025             if (packet.GetHexByteStringFixedLength(arg, arg_len) !=
1026                 (arg_len / 2))
1027               success = false;
1028             else {
1029               // If there are any bytes left
1030               if (packet.GetBytesLeft()) {
1031                 if (packet.GetChar() != ',')
1032                   success = false;
1033               }
1034 
1035               if (success) {
1036                 if (arg_idx == 0)
1037                   m_process_launch_info.GetExecutableFile().SetFile(
1038                       arg, FileSpec::Style::native);
1039                 m_process_launch_info.GetArguments().AppendArgument(arg);
1040                 LLDB_LOGF(log, "LLGSPacketHandler::%s added arg %d: \"%s\"",
1041                           __FUNCTION__, actual_arg_index, arg.c_str());
1042                 ++actual_arg_index;
1043               }
1044             }
1045           }
1046         }
1047       }
1048     }
1049   }
1050 
1051   if (success) {
1052     m_process_launch_error = LaunchProcess();
1053     if (m_process_launch_error.Success())
1054       return SendOKResponse();
1055     LLDB_LOG(log, "failed to launch exe: {0}", m_process_launch_error);
1056   }
1057   return SendErrorResponse(8);
1058 }
1059 
1060 GDBRemoteCommunication::PacketResult
1061 GDBRemoteCommunicationServerCommon::Handle_qEcho(
1062     StringExtractorGDBRemote &packet) {
1063   // Just echo back the exact same packet for qEcho...
1064   return SendPacketNoLock(packet.GetStringRef());
1065 }
1066 
1067 GDBRemoteCommunication::PacketResult
1068 GDBRemoteCommunicationServerCommon::Handle_qModuleInfo(
1069     StringExtractorGDBRemote &packet) {
1070   packet.SetFilePos(::strlen("qModuleInfo:"));
1071 
1072   std::string module_path;
1073   packet.GetHexByteStringTerminatedBy(module_path, ';');
1074   if (module_path.empty())
1075     return SendErrorResponse(1);
1076 
1077   if (packet.GetChar() != ';')
1078     return SendErrorResponse(2);
1079 
1080   std::string triple;
1081   packet.GetHexByteString(triple);
1082 
1083   ModuleSpec matched_module_spec = GetModuleInfo(module_path, triple);
1084   if (!matched_module_spec.GetFileSpec())
1085     return SendErrorResponse(3);
1086 
1087   const auto file_offset = matched_module_spec.GetObjectOffset();
1088   const auto file_size = matched_module_spec.GetObjectSize();
1089   const auto uuid_str = matched_module_spec.GetUUID().GetAsString("");
1090 
1091   StreamGDBRemote response;
1092 
1093   if (uuid_str.empty()) {
1094     auto Result = llvm::sys::fs::md5_contents(
1095         matched_module_spec.GetFileSpec().GetPath());
1096     if (!Result)
1097       return SendErrorResponse(5);
1098     response.PutCString("md5:");
1099     response.PutStringAsRawHex8(Result->digest());
1100   } else {
1101     response.PutCString("uuid:");
1102     response.PutStringAsRawHex8(uuid_str);
1103   }
1104   response.PutChar(';');
1105 
1106   const auto &module_arch = matched_module_spec.GetArchitecture();
1107   response.PutCString("triple:");
1108   response.PutStringAsRawHex8(module_arch.GetTriple().getTriple());
1109   response.PutChar(';');
1110 
1111   response.PutCString("file_path:");
1112   response.PutStringAsRawHex8(matched_module_spec.GetFileSpec().GetCString());
1113   response.PutChar(';');
1114   response.PutCString("file_offset:");
1115   response.PutHex64(file_offset);
1116   response.PutChar(';');
1117   response.PutCString("file_size:");
1118   response.PutHex64(file_size);
1119   response.PutChar(';');
1120 
1121   return SendPacketNoLock(response.GetString());
1122 }
1123 
1124 GDBRemoteCommunication::PacketResult
1125 GDBRemoteCommunicationServerCommon::Handle_jModulesInfo(
1126     StringExtractorGDBRemote &packet) {
1127   namespace json = llvm::json;
1128 
1129   packet.SetFilePos(::strlen("jModulesInfo:"));
1130 
1131   StructuredData::ObjectSP object_sp = StructuredData::ParseJSON(packet.Peek());
1132   if (!object_sp)
1133     return SendErrorResponse(1);
1134 
1135   StructuredData::Array *packet_array = object_sp->GetAsArray();
1136   if (!packet_array)
1137     return SendErrorResponse(2);
1138 
1139   json::Array response_array;
1140   for (size_t i = 0; i < packet_array->GetSize(); ++i) {
1141     StructuredData::Dictionary *query =
1142         packet_array->GetItemAtIndex(i)->GetAsDictionary();
1143     if (!query)
1144       continue;
1145     llvm::StringRef file, triple;
1146     if (!query->GetValueForKeyAsString("file", file) ||
1147         !query->GetValueForKeyAsString("triple", triple))
1148       continue;
1149 
1150     ModuleSpec matched_module_spec = GetModuleInfo(file, triple);
1151     if (!matched_module_spec.GetFileSpec())
1152       continue;
1153 
1154     const auto file_offset = matched_module_spec.GetObjectOffset();
1155     const auto file_size = matched_module_spec.GetObjectSize();
1156     const auto uuid_str = matched_module_spec.GetUUID().GetAsString("");
1157     if (uuid_str.empty())
1158       continue;
1159     const auto triple_str =
1160         matched_module_spec.GetArchitecture().GetTriple().getTriple();
1161     const auto file_path = matched_module_spec.GetFileSpec().GetPath();
1162 
1163     json::Object response{{"uuid", uuid_str},
1164                           {"triple", triple_str},
1165                           {"file_path", file_path},
1166                           {"file_offset", static_cast<int64_t>(file_offset)},
1167                           {"file_size", static_cast<int64_t>(file_size)}};
1168     response_array.push_back(std::move(response));
1169   }
1170 
1171   StreamString response;
1172   response.AsRawOstream() << std::move(response_array);
1173   StreamGDBRemote escaped_response;
1174   escaped_response.PutEscapedBytes(response.GetString().data(),
1175                                    response.GetSize());
1176   return SendPacketNoLock(escaped_response.GetString());
1177 }
1178 
1179 void GDBRemoteCommunicationServerCommon::CreateProcessInfoResponse(
1180     const ProcessInstanceInfo &proc_info, StreamString &response) {
1181   response.Printf(
1182       "pid:%" PRIu64 ";ppid:%" PRIu64 ";uid:%i;gid:%i;euid:%i;egid:%i;",
1183       proc_info.GetProcessID(), proc_info.GetParentProcessID(),
1184       proc_info.GetUserID(), proc_info.GetGroupID(),
1185       proc_info.GetEffectiveUserID(), proc_info.GetEffectiveGroupID());
1186   response.PutCString("name:");
1187   response.PutStringAsRawHex8(proc_info.GetExecutableFile().GetCString());
1188   response.PutChar(';');
1189   const ArchSpec &proc_arch = proc_info.GetArchitecture();
1190   if (proc_arch.IsValid()) {
1191     const llvm::Triple &proc_triple = proc_arch.GetTriple();
1192     response.PutCString("triple:");
1193     response.PutStringAsRawHex8(proc_triple.getTriple());
1194     response.PutChar(';');
1195   }
1196 }
1197 
1198 void GDBRemoteCommunicationServerCommon::
1199     CreateProcessInfoResponse_DebugServerStyle(
1200         const ProcessInstanceInfo &proc_info, StreamString &response) {
1201   response.Printf("pid:%" PRIx64 ";parent-pid:%" PRIx64
1202                   ";real-uid:%x;real-gid:%x;effective-uid:%x;effective-gid:%x;",
1203                   proc_info.GetProcessID(), proc_info.GetParentProcessID(),
1204                   proc_info.GetUserID(), proc_info.GetGroupID(),
1205                   proc_info.GetEffectiveUserID(),
1206                   proc_info.GetEffectiveGroupID());
1207 
1208   const ArchSpec &proc_arch = proc_info.GetArchitecture();
1209   if (proc_arch.IsValid()) {
1210     const llvm::Triple &proc_triple = proc_arch.GetTriple();
1211 #if defined(__APPLE__)
1212     // We'll send cputype/cpusubtype.
1213     const uint32_t cpu_type = proc_arch.GetMachOCPUType();
1214     if (cpu_type != 0)
1215       response.Printf("cputype:%" PRIx32 ";", cpu_type);
1216 
1217     const uint32_t cpu_subtype = proc_arch.GetMachOCPUSubType();
1218     if (cpu_subtype != 0)
1219       response.Printf("cpusubtype:%" PRIx32 ";", cpu_subtype);
1220 
1221     const std::string vendor = proc_triple.getVendorName();
1222     if (!vendor.empty())
1223       response.Printf("vendor:%s;", vendor.c_str());
1224 #else
1225     // We'll send the triple.
1226     response.PutCString("triple:");
1227     response.PutStringAsRawHex8(proc_triple.getTriple());
1228     response.PutChar(';');
1229 #endif
1230     std::string ostype = proc_triple.getOSName();
1231     // Adjust so ostype reports ios for Apple/ARM and Apple/ARM64.
1232     if (proc_triple.getVendor() == llvm::Triple::Apple) {
1233       switch (proc_triple.getArch()) {
1234       case llvm::Triple::arm:
1235       case llvm::Triple::thumb:
1236       case llvm::Triple::aarch64:
1237         ostype = "ios";
1238         break;
1239       default:
1240         // No change.
1241         break;
1242       }
1243     }
1244     response.Printf("ostype:%s;", ostype.c_str());
1245 
1246     switch (proc_arch.GetByteOrder()) {
1247     case lldb::eByteOrderLittle:
1248       response.PutCString("endian:little;");
1249       break;
1250     case lldb::eByteOrderBig:
1251       response.PutCString("endian:big;");
1252       break;
1253     case lldb::eByteOrderPDP:
1254       response.PutCString("endian:pdp;");
1255       break;
1256     default:
1257       // Nothing.
1258       break;
1259     }
1260     // In case of MIPS64, pointer size is depend on ELF ABI For N32 the pointer
1261     // size is 4 and for N64 it is 8
1262     std::string abi = proc_arch.GetTargetABI();
1263     if (!abi.empty())
1264       response.Printf("elf_abi:%s;", abi.c_str());
1265     response.Printf("ptrsize:%d;", proc_arch.GetAddressByteSize());
1266   }
1267 }
1268 
1269 FileSpec GDBRemoteCommunicationServerCommon::FindModuleFile(
1270     const std::string &module_path, const ArchSpec &arch) {
1271 #ifdef __ANDROID__
1272   return HostInfoAndroid::ResolveLibraryPath(module_path, arch);
1273 #else
1274   FileSpec file_spec(module_path);
1275   FileSystem::Instance().Resolve(file_spec);
1276   return file_spec;
1277 #endif
1278 }
1279 
1280 ModuleSpec
1281 GDBRemoteCommunicationServerCommon::GetModuleInfo(llvm::StringRef module_path,
1282                                                   llvm::StringRef triple) {
1283   ArchSpec arch(triple);
1284 
1285   FileSpec req_module_path_spec(module_path);
1286   FileSystem::Instance().Resolve(req_module_path_spec);
1287 
1288   const FileSpec module_path_spec =
1289       FindModuleFile(req_module_path_spec.GetPath(), arch);
1290   const ModuleSpec module_spec(module_path_spec, arch);
1291 
1292   ModuleSpecList module_specs;
1293   if (!ObjectFile::GetModuleSpecifications(module_path_spec, 0, 0,
1294                                            module_specs))
1295     return ModuleSpec();
1296 
1297   ModuleSpec matched_module_spec;
1298   if (!module_specs.FindMatchingModuleSpec(module_spec, matched_module_spec))
1299     return ModuleSpec();
1300 
1301   return matched_module_spec;
1302 }
1303