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_32 ||
235       host_arch.GetMachine() == llvm::Triple::aarch64_be ||
236       host_arch.GetMachine() == llvm::Triple::arm ||
237       host_arch.GetMachine() == llvm::Triple::armeb || host_arch.IsMIPS())
238     response.Printf("watchpoint_exceptions_received:before;");
239   else
240     response.Printf("watchpoint_exceptions_received:after;");
241 #endif
242 
243   switch (endian::InlHostByteOrder()) {
244   case eByteOrderBig:
245     response.PutCString("endian:big;");
246     break;
247   case eByteOrderLittle:
248     response.PutCString("endian:little;");
249     break;
250   case eByteOrderPDP:
251     response.PutCString("endian:pdp;");
252     break;
253   default:
254     response.PutCString("endian:unknown;");
255     break;
256   }
257 
258   llvm::VersionTuple version = HostInfo::GetOSVersion();
259   if (!version.empty()) {
260     response.Format("os_version:{0}", version.getAsString());
261     response.PutChar(';');
262   }
263 
264 #if defined(__APPLE__)
265   llvm::VersionTuple maccatalyst_version = HostInfo::GetMacCatalystVersion();
266   if (!maccatalyst_version.empty()) {
267     response.Format("maccatalyst_version:{0}",
268                     maccatalyst_version.getAsString());
269     response.PutChar(';');
270   }
271 #endif
272 
273   std::string s;
274   if (HostInfo::GetOSBuildString(s)) {
275     response.PutCString("os_build:");
276     response.PutStringAsRawHex8(s);
277     response.PutChar(';');
278   }
279   if (HostInfo::GetOSKernelDescription(s)) {
280     response.PutCString("os_kernel:");
281     response.PutStringAsRawHex8(s);
282     response.PutChar(';');
283   }
284 
285 #if defined(__APPLE__)
286 
287 #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
288   // For iOS devices, we are connected through a USB Mux so we never pretend to
289   // actually have a hostname as far as the remote lldb that is connecting to
290   // this lldb-platform is concerned
291   response.PutCString("hostname:");
292   response.PutStringAsRawHex8("127.0.0.1");
293   response.PutChar(';');
294 #else  // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
295   if (HostInfo::GetHostname(s)) {
296     response.PutCString("hostname:");
297     response.PutStringAsRawHex8(s);
298     response.PutChar(';');
299   }
300 #endif // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
301 
302 #else  // #if defined(__APPLE__)
303   if (HostInfo::GetHostname(s)) {
304     response.PutCString("hostname:");
305     response.PutStringAsRawHex8(s);
306     response.PutChar(';');
307   }
308 #endif // #if defined(__APPLE__)
309 
310   if (g_default_packet_timeout_sec > 0)
311     response.Printf("default_packet_timeout:%u;", g_default_packet_timeout_sec);
312 
313   return SendPacketNoLock(response.GetString());
314 }
315 
316 GDBRemoteCommunication::PacketResult
317 GDBRemoteCommunicationServerCommon::Handle_qProcessInfoPID(
318     StringExtractorGDBRemote &packet) {
319   // Packet format: "qProcessInfoPID:%i" where %i is the pid
320   packet.SetFilePos(::strlen("qProcessInfoPID:"));
321   lldb::pid_t pid = packet.GetU32(LLDB_INVALID_PROCESS_ID);
322   if (pid != LLDB_INVALID_PROCESS_ID) {
323     ProcessInstanceInfo proc_info;
324     if (Host::GetProcessInfo(pid, proc_info)) {
325       StreamString response;
326       CreateProcessInfoResponse(proc_info, response);
327       return SendPacketNoLock(response.GetString());
328     }
329   }
330   return SendErrorResponse(1);
331 }
332 
333 GDBRemoteCommunication::PacketResult
334 GDBRemoteCommunicationServerCommon::Handle_qfProcessInfo(
335     StringExtractorGDBRemote &packet) {
336   m_proc_infos_index = 0;
337   m_proc_infos.Clear();
338 
339   ProcessInstanceInfoMatch match_info;
340   packet.SetFilePos(::strlen("qfProcessInfo"));
341   if (packet.GetChar() == ':') {
342     llvm::StringRef key;
343     llvm::StringRef value;
344     while (packet.GetNameColonValue(key, value)) {
345       bool success = true;
346       if (key.equals("name")) {
347         StringExtractor extractor(value);
348         std::string file;
349         extractor.GetHexByteString(file);
350         match_info.GetProcessInfo().GetExecutableFile().SetFile(
351             file, FileSpec::Style::native);
352       } else if (key.equals("name_match")) {
353         NameMatch name_match = llvm::StringSwitch<NameMatch>(value)
354                                    .Case("equals", NameMatch::Equals)
355                                    .Case("starts_with", NameMatch::StartsWith)
356                                    .Case("ends_with", NameMatch::EndsWith)
357                                    .Case("contains", NameMatch::Contains)
358                                    .Case("regex", NameMatch::RegularExpression)
359                                    .Default(NameMatch::Ignore);
360         match_info.SetNameMatchType(name_match);
361         if (name_match == NameMatch::Ignore)
362           return SendErrorResponse(2);
363       } else if (key.equals("pid")) {
364         lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
365         if (value.getAsInteger(0, pid))
366           return SendErrorResponse(2);
367         match_info.GetProcessInfo().SetProcessID(pid);
368       } else if (key.equals("parent_pid")) {
369         lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
370         if (value.getAsInteger(0, pid))
371           return SendErrorResponse(2);
372         match_info.GetProcessInfo().SetParentProcessID(pid);
373       } else if (key.equals("uid")) {
374         uint32_t uid = UINT32_MAX;
375         if (value.getAsInteger(0, uid))
376           return SendErrorResponse(2);
377         match_info.GetProcessInfo().SetUserID(uid);
378       } else if (key.equals("gid")) {
379         uint32_t gid = UINT32_MAX;
380         if (value.getAsInteger(0, gid))
381           return SendErrorResponse(2);
382         match_info.GetProcessInfo().SetGroupID(gid);
383       } else if (key.equals("euid")) {
384         uint32_t uid = UINT32_MAX;
385         if (value.getAsInteger(0, uid))
386           return SendErrorResponse(2);
387         match_info.GetProcessInfo().SetEffectiveUserID(uid);
388       } else if (key.equals("egid")) {
389         uint32_t gid = UINT32_MAX;
390         if (value.getAsInteger(0, gid))
391           return SendErrorResponse(2);
392         match_info.GetProcessInfo().SetEffectiveGroupID(gid);
393       } else if (key.equals("all_users")) {
394         match_info.SetMatchAllUsers(
395             OptionArgParser::ToBoolean(value, false, &success));
396       } else if (key.equals("triple")) {
397         match_info.GetProcessInfo().GetArchitecture() =
398             HostInfo::GetAugmentedArchSpec(value);
399       } else {
400         success = false;
401       }
402 
403       if (!success)
404         return SendErrorResponse(2);
405     }
406   }
407 
408   if (Host::FindProcesses(match_info, m_proc_infos)) {
409     // We found something, return the first item by calling the get subsequent
410     // process info packet handler...
411     return Handle_qsProcessInfo(packet);
412   }
413   return SendErrorResponse(3);
414 }
415 
416 GDBRemoteCommunication::PacketResult
417 GDBRemoteCommunicationServerCommon::Handle_qsProcessInfo(
418     StringExtractorGDBRemote &packet) {
419   if (m_proc_infos_index < m_proc_infos.GetSize()) {
420     StreamString response;
421     CreateProcessInfoResponse(
422         m_proc_infos.GetProcessInfoAtIndex(m_proc_infos_index), response);
423     ++m_proc_infos_index;
424     return SendPacketNoLock(response.GetString());
425   }
426   return SendErrorResponse(4);
427 }
428 
429 GDBRemoteCommunication::PacketResult
430 GDBRemoteCommunicationServerCommon::Handle_qUserName(
431     StringExtractorGDBRemote &packet) {
432 #if LLDB_ENABLE_POSIX
433   Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
434   LLDB_LOGF(log, "GDBRemoteCommunicationServerCommon::%s begin", __FUNCTION__);
435 
436   // Packet format: "qUserName:%i" where %i is the uid
437   packet.SetFilePos(::strlen("qUserName:"));
438   uint32_t uid = packet.GetU32(UINT32_MAX);
439   if (uid != UINT32_MAX) {
440     if (llvm::Optional<llvm::StringRef> name =
441             HostInfo::GetUserIDResolver().GetUserName(uid)) {
442       StreamString response;
443       response.PutStringAsRawHex8(*name);
444       return SendPacketNoLock(response.GetString());
445     }
446   }
447   LLDB_LOGF(log, "GDBRemoteCommunicationServerCommon::%s end", __FUNCTION__);
448 #endif
449   return SendErrorResponse(5);
450 }
451 
452 GDBRemoteCommunication::PacketResult
453 GDBRemoteCommunicationServerCommon::Handle_qGroupName(
454     StringExtractorGDBRemote &packet) {
455 #if LLDB_ENABLE_POSIX
456   // Packet format: "qGroupName:%i" where %i is the gid
457   packet.SetFilePos(::strlen("qGroupName:"));
458   uint32_t gid = packet.GetU32(UINT32_MAX);
459   if (gid != UINT32_MAX) {
460     if (llvm::Optional<llvm::StringRef> name =
461             HostInfo::GetUserIDResolver().GetGroupName(gid)) {
462       StreamString response;
463       response.PutStringAsRawHex8(*name);
464       return SendPacketNoLock(response.GetString());
465     }
466   }
467 #endif
468   return SendErrorResponse(6);
469 }
470 
471 GDBRemoteCommunication::PacketResult
472 GDBRemoteCommunicationServerCommon::Handle_qSpeedTest(
473     StringExtractorGDBRemote &packet) {
474   packet.SetFilePos(::strlen("qSpeedTest:"));
475 
476   llvm::StringRef key;
477   llvm::StringRef value;
478   bool success = packet.GetNameColonValue(key, value);
479   if (success && key.equals("response_size")) {
480     uint32_t response_size = 0;
481     if (!value.getAsInteger(0, response_size)) {
482       if (response_size == 0)
483         return SendOKResponse();
484       StreamString response;
485       uint32_t bytes_left = response_size;
486       response.PutCString("data:");
487       while (bytes_left > 0) {
488         if (bytes_left >= 26) {
489           response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
490           bytes_left -= 26;
491         } else {
492           response.Printf("%*.*s;", bytes_left, bytes_left,
493                           "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
494           bytes_left = 0;
495         }
496       }
497       return SendPacketNoLock(response.GetString());
498     }
499   }
500   return SendErrorResponse(7);
501 }
502 
503 GDBRemoteCommunication::PacketResult
504 GDBRemoteCommunicationServerCommon::Handle_vFile_Open(
505     StringExtractorGDBRemote &packet) {
506   packet.SetFilePos(::strlen("vFile:open:"));
507   std::string path;
508   packet.GetHexByteStringTerminatedBy(path, ',');
509   if (!path.empty()) {
510     if (packet.GetChar() == ',') {
511       // FIXME
512       // The flag values for OpenOptions do not match the values used by GDB
513       // * https://sourceware.org/gdb/onlinedocs/gdb/Open-Flags.html#Open-Flags
514       // * rdar://problem/46788934
515       auto flags = File::OpenOptions(packet.GetHexMaxU32(false, 0));
516       if (packet.GetChar() == ',') {
517         mode_t mode = packet.GetHexMaxU32(false, 0600);
518         FileSpec path_spec(path);
519         FileSystem::Instance().Resolve(path_spec);
520         // Do not close fd.
521         auto file = FileSystem::Instance().Open(path_spec, flags, mode, false);
522 
523         int save_errno = 0;
524         int descriptor = File::kInvalidDescriptor;
525         if (file) {
526           descriptor = file.get()->GetDescriptor();
527         } else {
528           std::error_code code = errorToErrorCode(file.takeError());
529           if (code.category() == std::system_category()) {
530             save_errno = code.value();
531           }
532         }
533 
534         StreamString response;
535         response.PutChar('F');
536         response.Printf("%i", descriptor);
537         if (save_errno)
538           response.Printf(",%i", save_errno);
539         return SendPacketNoLock(response.GetString());
540       }
541     }
542   }
543   return SendErrorResponse(18);
544 }
545 
546 GDBRemoteCommunication::PacketResult
547 GDBRemoteCommunicationServerCommon::Handle_vFile_Close(
548     StringExtractorGDBRemote &packet) {
549   packet.SetFilePos(::strlen("vFile:close:"));
550   int fd = packet.GetS32(-1);
551   int err = -1;
552   int save_errno = 0;
553   if (fd >= 0) {
554     NativeFile file(fd, File::OpenOptions(0), true);
555     Status error = file.Close();
556     err = 0;
557     save_errno = error.GetError();
558   } else {
559     save_errno = EINVAL;
560   }
561   StreamString response;
562   response.PutChar('F');
563   response.Printf("%i", err);
564   if (save_errno)
565     response.Printf(",%i", save_errno);
566   return SendPacketNoLock(response.GetString());
567 }
568 
569 GDBRemoteCommunication::PacketResult
570 GDBRemoteCommunicationServerCommon::Handle_vFile_pRead(
571     StringExtractorGDBRemote &packet) {
572   StreamGDBRemote response;
573   packet.SetFilePos(::strlen("vFile:pread:"));
574   int fd = packet.GetS32(-1);
575   if (packet.GetChar() == ',') {
576     size_t count = packet.GetU64(SIZE_MAX);
577     if (packet.GetChar() == ',') {
578       off_t offset = packet.GetU64(UINT32_MAX);
579       if (count == SIZE_MAX) {
580         response.Printf("F-1:%i", EINVAL);
581         return SendPacketNoLock(response.GetString());
582       }
583 
584       std::string buffer(count, 0);
585       NativeFile file(fd, File::eOpenOptionRead, false);
586       Status error = file.Read(static_cast<void *>(&buffer[0]), count, offset);
587       const ssize_t bytes_read = error.Success() ? count : -1;
588       const int save_errno = error.GetError();
589       response.PutChar('F');
590       response.Printf("%zi", bytes_read);
591       if (save_errno)
592         response.Printf(",%i", save_errno);
593       else {
594         response.PutChar(';');
595         response.PutEscapedBytes(&buffer[0], bytes_read);
596       }
597       return SendPacketNoLock(response.GetString());
598     }
599   }
600   return SendErrorResponse(21);
601 }
602 
603 GDBRemoteCommunication::PacketResult
604 GDBRemoteCommunicationServerCommon::Handle_vFile_pWrite(
605     StringExtractorGDBRemote &packet) {
606   packet.SetFilePos(::strlen("vFile:pwrite:"));
607 
608   StreamGDBRemote response;
609   response.PutChar('F');
610 
611   int fd = packet.GetU32(UINT32_MAX);
612   if (packet.GetChar() == ',') {
613     off_t offset = packet.GetU64(UINT32_MAX);
614     if (packet.GetChar() == ',') {
615       std::string buffer;
616       if (packet.GetEscapedBinaryData(buffer)) {
617         NativeFile file(fd, File::eOpenOptionWrite, false);
618         size_t count = buffer.size();
619         Status error =
620             file.Write(static_cast<const void *>(&buffer[0]), count, offset);
621         const ssize_t bytes_written = error.Success() ? count : -1;
622         const int save_errno = error.GetError();
623         response.Printf("%zi", bytes_written);
624         if (save_errno)
625           response.Printf(",%i", save_errno);
626       } else {
627         response.Printf("-1,%i", EINVAL);
628       }
629       return SendPacketNoLock(response.GetString());
630     }
631   }
632   return SendErrorResponse(27);
633 }
634 
635 GDBRemoteCommunication::PacketResult
636 GDBRemoteCommunicationServerCommon::Handle_vFile_Size(
637     StringExtractorGDBRemote &packet) {
638   packet.SetFilePos(::strlen("vFile:size:"));
639   std::string path;
640   packet.GetHexByteString(path);
641   if (!path.empty()) {
642     uint64_t Size;
643     if (llvm::sys::fs::file_size(path, Size))
644       return SendErrorResponse(5);
645     StreamString response;
646     response.PutChar('F');
647     response.PutHex64(Size);
648     if (Size == UINT64_MAX) {
649       response.PutChar(',');
650       response.PutHex64(Size); // TODO: replace with Host::GetSyswideErrorCode()
651     }
652     return SendPacketNoLock(response.GetString());
653   }
654   return SendErrorResponse(22);
655 }
656 
657 GDBRemoteCommunication::PacketResult
658 GDBRemoteCommunicationServerCommon::Handle_vFile_Mode(
659     StringExtractorGDBRemote &packet) {
660   packet.SetFilePos(::strlen("vFile:mode:"));
661   std::string path;
662   packet.GetHexByteString(path);
663   if (!path.empty()) {
664     FileSpec file_spec(path);
665     FileSystem::Instance().Resolve(file_spec);
666     std::error_code ec;
667     const uint32_t mode = FileSystem::Instance().GetPermissions(file_spec, ec);
668     StreamString response;
669     response.Printf("F%u", mode);
670     if (mode == 0 || ec)
671       response.Printf(",%i", (int)Status(ec).GetError());
672     return SendPacketNoLock(response.GetString());
673   }
674   return SendErrorResponse(23);
675 }
676 
677 GDBRemoteCommunication::PacketResult
678 GDBRemoteCommunicationServerCommon::Handle_vFile_Exists(
679     StringExtractorGDBRemote &packet) {
680   packet.SetFilePos(::strlen("vFile:exists:"));
681   std::string path;
682   packet.GetHexByteString(path);
683   if (!path.empty()) {
684     bool retcode = llvm::sys::fs::exists(path);
685     StreamString response;
686     response.PutChar('F');
687     response.PutChar(',');
688     if (retcode)
689       response.PutChar('1');
690     else
691       response.PutChar('0');
692     return SendPacketNoLock(response.GetString());
693   }
694   return SendErrorResponse(24);
695 }
696 
697 GDBRemoteCommunication::PacketResult
698 GDBRemoteCommunicationServerCommon::Handle_vFile_symlink(
699     StringExtractorGDBRemote &packet) {
700   packet.SetFilePos(::strlen("vFile:symlink:"));
701   std::string dst, src;
702   packet.GetHexByteStringTerminatedBy(dst, ',');
703   packet.GetChar(); // Skip ',' char
704   packet.GetHexByteString(src);
705 
706   FileSpec src_spec(src);
707   FileSystem::Instance().Resolve(src_spec);
708   Status error = FileSystem::Instance().Symlink(src_spec, FileSpec(dst));
709 
710   StreamString response;
711   response.Printf("F%u,%u", error.GetError(), error.GetError());
712   return SendPacketNoLock(response.GetString());
713 }
714 
715 GDBRemoteCommunication::PacketResult
716 GDBRemoteCommunicationServerCommon::Handle_vFile_unlink(
717     StringExtractorGDBRemote &packet) {
718   packet.SetFilePos(::strlen("vFile:unlink:"));
719   std::string path;
720   packet.GetHexByteString(path);
721   Status error(llvm::sys::fs::remove(path));
722   StreamString response;
723   response.Printf("F%u,%u", error.GetError(), error.GetError());
724   return SendPacketNoLock(response.GetString());
725 }
726 
727 GDBRemoteCommunication::PacketResult
728 GDBRemoteCommunicationServerCommon::Handle_qPlatform_shell(
729     StringExtractorGDBRemote &packet) {
730   packet.SetFilePos(::strlen("qPlatform_shell:"));
731   std::string path;
732   std::string working_dir;
733   packet.GetHexByteStringTerminatedBy(path, ',');
734   if (!path.empty()) {
735     if (packet.GetChar() == ',') {
736       // FIXME: add timeout to qPlatform_shell packet
737       // uint32_t timeout = packet.GetHexMaxU32(false, 32);
738       if (packet.GetChar() == ',')
739         packet.GetHexByteString(working_dir);
740       int status, signo;
741       std::string output;
742       FileSpec working_spec(working_dir);
743       FileSystem::Instance().Resolve(working_spec);
744       Status err =
745           Host::RunShellCommand(path.c_str(), working_spec, &status, &signo,
746                                 &output, std::chrono::seconds(10));
747       StreamGDBRemote response;
748       if (err.Fail()) {
749         response.PutCString("F,");
750         response.PutHex32(UINT32_MAX);
751       } else {
752         response.PutCString("F,");
753         response.PutHex32(status);
754         response.PutChar(',');
755         response.PutHex32(signo);
756         response.PutChar(',');
757         response.PutEscapedBytes(output.c_str(), output.size());
758       }
759       return SendPacketNoLock(response.GetString());
760     }
761   }
762   return SendErrorResponse(24);
763 }
764 
765 GDBRemoteCommunication::PacketResult
766 GDBRemoteCommunicationServerCommon::Handle_vFile_Stat(
767     StringExtractorGDBRemote &packet) {
768   return SendUnimplementedResponse(
769       "GDBRemoteCommunicationServerCommon::Handle_vFile_Stat() unimplemented");
770 }
771 
772 GDBRemoteCommunication::PacketResult
773 GDBRemoteCommunicationServerCommon::Handle_vFile_MD5(
774     StringExtractorGDBRemote &packet) {
775   packet.SetFilePos(::strlen("vFile:MD5:"));
776   std::string path;
777   packet.GetHexByteString(path);
778   if (!path.empty()) {
779     StreamGDBRemote response;
780     auto Result = llvm::sys::fs::md5_contents(path);
781     if (!Result) {
782       response.PutCString("F,");
783       response.PutCString("x");
784     } else {
785       response.PutCString("F,");
786       response.PutHex64(Result->low());
787       response.PutHex64(Result->high());
788     }
789     return SendPacketNoLock(response.GetString());
790   }
791   return SendErrorResponse(25);
792 }
793 
794 GDBRemoteCommunication::PacketResult
795 GDBRemoteCommunicationServerCommon::Handle_qPlatform_mkdir(
796     StringExtractorGDBRemote &packet) {
797   packet.SetFilePos(::strlen("qPlatform_mkdir:"));
798   mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX);
799   if (packet.GetChar() == ',') {
800     std::string path;
801     packet.GetHexByteString(path);
802     Status error(llvm::sys::fs::create_directory(path, mode));
803 
804     StreamGDBRemote response;
805     response.Printf("F%u", error.GetError());
806 
807     return SendPacketNoLock(response.GetString());
808   }
809   return SendErrorResponse(20);
810 }
811 
812 GDBRemoteCommunication::PacketResult
813 GDBRemoteCommunicationServerCommon::Handle_qPlatform_chmod(
814     StringExtractorGDBRemote &packet) {
815   packet.SetFilePos(::strlen("qPlatform_chmod:"));
816 
817   auto perms =
818       static_cast<llvm::sys::fs::perms>(packet.GetHexMaxU32(false, UINT32_MAX));
819   if (packet.GetChar() == ',') {
820     std::string path;
821     packet.GetHexByteString(path);
822     Status error(llvm::sys::fs::setPermissions(path, perms));
823 
824     StreamGDBRemote response;
825     response.Printf("F%u", error.GetError());
826 
827     return SendPacketNoLock(response.GetString());
828   }
829   return SendErrorResponse(19);
830 }
831 
832 GDBRemoteCommunication::PacketResult
833 GDBRemoteCommunicationServerCommon::Handle_qSupported(
834     StringExtractorGDBRemote &packet) {
835   StreamGDBRemote response;
836 
837   // Features common to lldb-platform and llgs.
838   uint32_t max_packet_size = 128 * 1024; // 128KBytes is a reasonable max packet
839                                          // size--debugger can always use less
840   response.Printf("PacketSize=%x", max_packet_size);
841 
842   response.PutCString(";QStartNoAckMode+");
843   response.PutCString(";QThreadSuffixSupported+");
844   response.PutCString(";QListThreadsInStopReply+");
845   response.PutCString(";qEcho+");
846 #if defined(__linux__) || defined(__NetBSD__)
847   response.PutCString(";QPassSignals+");
848   response.PutCString(";qXfer:auxv:read+");
849   response.PutCString(";qXfer:libraries-svr4:read+");
850 #endif
851 
852   return SendPacketNoLock(response.GetString());
853 }
854 
855 GDBRemoteCommunication::PacketResult
856 GDBRemoteCommunicationServerCommon::Handle_QThreadSuffixSupported(
857     StringExtractorGDBRemote &packet) {
858   m_thread_suffix_supported = true;
859   return SendOKResponse();
860 }
861 
862 GDBRemoteCommunication::PacketResult
863 GDBRemoteCommunicationServerCommon::Handle_QListThreadsInStopReply(
864     StringExtractorGDBRemote &packet) {
865   m_list_threads_in_stop_reply = true;
866   return SendOKResponse();
867 }
868 
869 GDBRemoteCommunication::PacketResult
870 GDBRemoteCommunicationServerCommon::Handle_QSetDetachOnError(
871     StringExtractorGDBRemote &packet) {
872   packet.SetFilePos(::strlen("QSetDetachOnError:"));
873   if (packet.GetU32(0))
874     m_process_launch_info.GetFlags().Set(eLaunchFlagDetachOnError);
875   else
876     m_process_launch_info.GetFlags().Clear(eLaunchFlagDetachOnError);
877   return SendOKResponse();
878 }
879 
880 GDBRemoteCommunication::PacketResult
881 GDBRemoteCommunicationServerCommon::Handle_QStartNoAckMode(
882     StringExtractorGDBRemote &packet) {
883   // Send response first before changing m_send_acks to we ack this packet
884   PacketResult packet_result = SendOKResponse();
885   m_send_acks = false;
886   return packet_result;
887 }
888 
889 GDBRemoteCommunication::PacketResult
890 GDBRemoteCommunicationServerCommon::Handle_QSetSTDIN(
891     StringExtractorGDBRemote &packet) {
892   packet.SetFilePos(::strlen("QSetSTDIN:"));
893   FileAction file_action;
894   std::string path;
895   packet.GetHexByteString(path);
896   const bool read = true;
897   const bool write = false;
898   if (file_action.Open(STDIN_FILENO, FileSpec(path), read, write)) {
899     m_process_launch_info.AppendFileAction(file_action);
900     return SendOKResponse();
901   }
902   return SendErrorResponse(15);
903 }
904 
905 GDBRemoteCommunication::PacketResult
906 GDBRemoteCommunicationServerCommon::Handle_QSetSTDOUT(
907     StringExtractorGDBRemote &packet) {
908   packet.SetFilePos(::strlen("QSetSTDOUT:"));
909   FileAction file_action;
910   std::string path;
911   packet.GetHexByteString(path);
912   const bool read = false;
913   const bool write = true;
914   if (file_action.Open(STDOUT_FILENO, FileSpec(path), read, write)) {
915     m_process_launch_info.AppendFileAction(file_action);
916     return SendOKResponse();
917   }
918   return SendErrorResponse(16);
919 }
920 
921 GDBRemoteCommunication::PacketResult
922 GDBRemoteCommunicationServerCommon::Handle_QSetSTDERR(
923     StringExtractorGDBRemote &packet) {
924   packet.SetFilePos(::strlen("QSetSTDERR:"));
925   FileAction file_action;
926   std::string path;
927   packet.GetHexByteString(path);
928   const bool read = false;
929   const bool write = true;
930   if (file_action.Open(STDERR_FILENO, FileSpec(path), read, write)) {
931     m_process_launch_info.AppendFileAction(file_action);
932     return SendOKResponse();
933   }
934   return SendErrorResponse(17);
935 }
936 
937 GDBRemoteCommunication::PacketResult
938 GDBRemoteCommunicationServerCommon::Handle_qLaunchSuccess(
939     StringExtractorGDBRemote &packet) {
940   if (m_process_launch_error.Success())
941     return SendOKResponse();
942   StreamString response;
943   response.PutChar('E');
944   response.PutCString(m_process_launch_error.AsCString("<unknown error>"));
945   return SendPacketNoLock(response.GetString());
946 }
947 
948 GDBRemoteCommunication::PacketResult
949 GDBRemoteCommunicationServerCommon::Handle_QEnvironment(
950     StringExtractorGDBRemote &packet) {
951   packet.SetFilePos(::strlen("QEnvironment:"));
952   const uint32_t bytes_left = packet.GetBytesLeft();
953   if (bytes_left > 0) {
954     m_process_launch_info.GetEnvironment().insert(packet.Peek());
955     return SendOKResponse();
956   }
957   return SendErrorResponse(12);
958 }
959 
960 GDBRemoteCommunication::PacketResult
961 GDBRemoteCommunicationServerCommon::Handle_QEnvironmentHexEncoded(
962     StringExtractorGDBRemote &packet) {
963   packet.SetFilePos(::strlen("QEnvironmentHexEncoded:"));
964   const uint32_t bytes_left = packet.GetBytesLeft();
965   if (bytes_left > 0) {
966     std::string str;
967     packet.GetHexByteString(str);
968     m_process_launch_info.GetEnvironment().insert(str);
969     return SendOKResponse();
970   }
971   return SendErrorResponse(12);
972 }
973 
974 GDBRemoteCommunication::PacketResult
975 GDBRemoteCommunicationServerCommon::Handle_QLaunchArch(
976     StringExtractorGDBRemote &packet) {
977   packet.SetFilePos(::strlen("QLaunchArch:"));
978   const uint32_t bytes_left = packet.GetBytesLeft();
979   if (bytes_left > 0) {
980     const char *arch_triple = packet.Peek();
981     m_process_launch_info.SetArchitecture(
982         HostInfo::GetAugmentedArchSpec(arch_triple));
983     return SendOKResponse();
984   }
985   return SendErrorResponse(13);
986 }
987 
988 GDBRemoteCommunication::PacketResult
989 GDBRemoteCommunicationServerCommon::Handle_A(StringExtractorGDBRemote &packet) {
990   // The 'A' packet is the most over designed packet ever here with redundant
991   // argument indexes, redundant argument lengths and needed hex encoded
992   // argument string values. Really all that is needed is a comma separated hex
993   // encoded argument value list, but we will stay true to the documented
994   // version of the 'A' packet here...
995 
996   Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
997   int actual_arg_index = 0;
998 
999   packet.SetFilePos(1); // Skip the 'A'
1000   bool success = true;
1001   while (success && packet.GetBytesLeft() > 0) {
1002     // Decode the decimal argument string length. This length is the number of
1003     // hex nibbles in the argument string value.
1004     const uint32_t arg_len = packet.GetU32(UINT32_MAX);
1005     if (arg_len == UINT32_MAX)
1006       success = false;
1007     else {
1008       // Make sure the argument hex string length is followed by a comma
1009       if (packet.GetChar() != ',')
1010         success = false;
1011       else {
1012         // Decode the argument index. We ignore this really because who would
1013         // really send down the arguments in a random order???
1014         const uint32_t arg_idx = packet.GetU32(UINT32_MAX);
1015         if (arg_idx == UINT32_MAX)
1016           success = false;
1017         else {
1018           // Make sure the argument index is followed by a comma
1019           if (packet.GetChar() != ',')
1020             success = false;
1021           else {
1022             // Decode the argument string value from hex bytes back into a UTF8
1023             // string and make sure the length matches the one supplied in the
1024             // packet
1025             std::string arg;
1026             if (packet.GetHexByteStringFixedLength(arg, arg_len) !=
1027                 (arg_len / 2))
1028               success = false;
1029             else {
1030               // If there are any bytes left
1031               if (packet.GetBytesLeft()) {
1032                 if (packet.GetChar() != ',')
1033                   success = false;
1034               }
1035 
1036               if (success) {
1037                 if (arg_idx == 0)
1038                   m_process_launch_info.GetExecutableFile().SetFile(
1039                       arg, FileSpec::Style::native);
1040                 m_process_launch_info.GetArguments().AppendArgument(arg);
1041                 LLDB_LOGF(log, "LLGSPacketHandler::%s added arg %d: \"%s\"",
1042                           __FUNCTION__, actual_arg_index, arg.c_str());
1043                 ++actual_arg_index;
1044               }
1045             }
1046           }
1047         }
1048       }
1049     }
1050   }
1051 
1052   if (success) {
1053     m_process_launch_error = LaunchProcess();
1054     if (m_process_launch_error.Success())
1055       return SendOKResponse();
1056     LLDB_LOG(log, "failed to launch exe: {0}", m_process_launch_error);
1057   }
1058   return SendErrorResponse(8);
1059 }
1060 
1061 GDBRemoteCommunication::PacketResult
1062 GDBRemoteCommunicationServerCommon::Handle_qEcho(
1063     StringExtractorGDBRemote &packet) {
1064   // Just echo back the exact same packet for qEcho...
1065   return SendPacketNoLock(packet.GetStringRef());
1066 }
1067 
1068 GDBRemoteCommunication::PacketResult
1069 GDBRemoteCommunicationServerCommon::Handle_qModuleInfo(
1070     StringExtractorGDBRemote &packet) {
1071   packet.SetFilePos(::strlen("qModuleInfo:"));
1072 
1073   std::string module_path;
1074   packet.GetHexByteStringTerminatedBy(module_path, ';');
1075   if (module_path.empty())
1076     return SendErrorResponse(1);
1077 
1078   if (packet.GetChar() != ';')
1079     return SendErrorResponse(2);
1080 
1081   std::string triple;
1082   packet.GetHexByteString(triple);
1083 
1084   ModuleSpec matched_module_spec = GetModuleInfo(module_path, triple);
1085   if (!matched_module_spec.GetFileSpec())
1086     return SendErrorResponse(3);
1087 
1088   const auto file_offset = matched_module_spec.GetObjectOffset();
1089   const auto file_size = matched_module_spec.GetObjectSize();
1090   const auto uuid_str = matched_module_spec.GetUUID().GetAsString("");
1091 
1092   StreamGDBRemote response;
1093 
1094   if (uuid_str.empty()) {
1095     auto Result = llvm::sys::fs::md5_contents(
1096         matched_module_spec.GetFileSpec().GetPath());
1097     if (!Result)
1098       return SendErrorResponse(5);
1099     response.PutCString("md5:");
1100     response.PutStringAsRawHex8(Result->digest());
1101   } else {
1102     response.PutCString("uuid:");
1103     response.PutStringAsRawHex8(uuid_str);
1104   }
1105   response.PutChar(';');
1106 
1107   const auto &module_arch = matched_module_spec.GetArchitecture();
1108   response.PutCString("triple:");
1109   response.PutStringAsRawHex8(module_arch.GetTriple().getTriple());
1110   response.PutChar(';');
1111 
1112   response.PutCString("file_path:");
1113   response.PutStringAsRawHex8(matched_module_spec.GetFileSpec().GetCString());
1114   response.PutChar(';');
1115   response.PutCString("file_offset:");
1116   response.PutHex64(file_offset);
1117   response.PutChar(';');
1118   response.PutCString("file_size:");
1119   response.PutHex64(file_size);
1120   response.PutChar(';');
1121 
1122   return SendPacketNoLock(response.GetString());
1123 }
1124 
1125 GDBRemoteCommunication::PacketResult
1126 GDBRemoteCommunicationServerCommon::Handle_jModulesInfo(
1127     StringExtractorGDBRemote &packet) {
1128   namespace json = llvm::json;
1129 
1130   packet.SetFilePos(::strlen("jModulesInfo:"));
1131 
1132   StructuredData::ObjectSP object_sp = StructuredData::ParseJSON(packet.Peek());
1133   if (!object_sp)
1134     return SendErrorResponse(1);
1135 
1136   StructuredData::Array *packet_array = object_sp->GetAsArray();
1137   if (!packet_array)
1138     return SendErrorResponse(2);
1139 
1140   json::Array response_array;
1141   for (size_t i = 0; i < packet_array->GetSize(); ++i) {
1142     StructuredData::Dictionary *query =
1143         packet_array->GetItemAtIndex(i)->GetAsDictionary();
1144     if (!query)
1145       continue;
1146     llvm::StringRef file, triple;
1147     if (!query->GetValueForKeyAsString("file", file) ||
1148         !query->GetValueForKeyAsString("triple", triple))
1149       continue;
1150 
1151     ModuleSpec matched_module_spec = GetModuleInfo(file, triple);
1152     if (!matched_module_spec.GetFileSpec())
1153       continue;
1154 
1155     const auto file_offset = matched_module_spec.GetObjectOffset();
1156     const auto file_size = matched_module_spec.GetObjectSize();
1157     const auto uuid_str = matched_module_spec.GetUUID().GetAsString("");
1158     if (uuid_str.empty())
1159       continue;
1160     const auto triple_str =
1161         matched_module_spec.GetArchitecture().GetTriple().getTriple();
1162     const auto file_path = matched_module_spec.GetFileSpec().GetPath();
1163 
1164     json::Object response{{"uuid", uuid_str},
1165                           {"triple", triple_str},
1166                           {"file_path", file_path},
1167                           {"file_offset", static_cast<int64_t>(file_offset)},
1168                           {"file_size", static_cast<int64_t>(file_size)}};
1169     response_array.push_back(std::move(response));
1170   }
1171 
1172   StreamString response;
1173   response.AsRawOstream() << std::move(response_array);
1174   StreamGDBRemote escaped_response;
1175   escaped_response.PutEscapedBytes(response.GetString().data(),
1176                                    response.GetSize());
1177   return SendPacketNoLock(escaped_response.GetString());
1178 }
1179 
1180 void GDBRemoteCommunicationServerCommon::CreateProcessInfoResponse(
1181     const ProcessInstanceInfo &proc_info, StreamString &response) {
1182   response.Printf(
1183       "pid:%" PRIu64 ";ppid:%" PRIu64 ";uid:%i;gid:%i;euid:%i;egid:%i;",
1184       proc_info.GetProcessID(), proc_info.GetParentProcessID(),
1185       proc_info.GetUserID(), proc_info.GetGroupID(),
1186       proc_info.GetEffectiveUserID(), proc_info.GetEffectiveGroupID());
1187   response.PutCString("name:");
1188   response.PutStringAsRawHex8(proc_info.GetExecutableFile().GetCString());
1189 
1190   response.PutChar(';');
1191   response.PutCString("args:");
1192   response.PutStringAsRawHex8(proc_info.GetArg0());
1193   for (auto &arg : proc_info.GetArguments()) {
1194     response.PutChar('-');
1195     response.PutStringAsRawHex8(arg.ref());
1196   }
1197 
1198   response.PutChar(';');
1199   const ArchSpec &proc_arch = proc_info.GetArchitecture();
1200   if (proc_arch.IsValid()) {
1201     const llvm::Triple &proc_triple = proc_arch.GetTriple();
1202     response.PutCString("triple:");
1203     response.PutStringAsRawHex8(proc_triple.getTriple());
1204     response.PutChar(';');
1205   }
1206 }
1207 
1208 void GDBRemoteCommunicationServerCommon::
1209     CreateProcessInfoResponse_DebugServerStyle(
1210         const ProcessInstanceInfo &proc_info, StreamString &response) {
1211   response.Printf("pid:%" PRIx64 ";parent-pid:%" PRIx64
1212                   ";real-uid:%x;real-gid:%x;effective-uid:%x;effective-gid:%x;",
1213                   proc_info.GetProcessID(), proc_info.GetParentProcessID(),
1214                   proc_info.GetUserID(), proc_info.GetGroupID(),
1215                   proc_info.GetEffectiveUserID(),
1216                   proc_info.GetEffectiveGroupID());
1217 
1218   const ArchSpec &proc_arch = proc_info.GetArchitecture();
1219   if (proc_arch.IsValid()) {
1220     const llvm::Triple &proc_triple = proc_arch.GetTriple();
1221 #if defined(__APPLE__)
1222     // We'll send cputype/cpusubtype.
1223     const uint32_t cpu_type = proc_arch.GetMachOCPUType();
1224     if (cpu_type != 0)
1225       response.Printf("cputype:%" PRIx32 ";", cpu_type);
1226 
1227     const uint32_t cpu_subtype = proc_arch.GetMachOCPUSubType();
1228     if (cpu_subtype != 0)
1229       response.Printf("cpusubtype:%" PRIx32 ";", cpu_subtype);
1230 
1231     const std::string vendor = proc_triple.getVendorName();
1232     if (!vendor.empty())
1233       response.Printf("vendor:%s;", vendor.c_str());
1234 #else
1235     // We'll send the triple.
1236     response.PutCString("triple:");
1237     response.PutStringAsRawHex8(proc_triple.getTriple());
1238     response.PutChar(';');
1239 #endif
1240     std::string ostype = proc_triple.getOSName();
1241     // Adjust so ostype reports ios for Apple/ARM and Apple/ARM64.
1242     if (proc_triple.getVendor() == llvm::Triple::Apple) {
1243       switch (proc_triple.getArch()) {
1244       case llvm::Triple::arm:
1245       case llvm::Triple::thumb:
1246       case llvm::Triple::aarch64:
1247       case llvm::Triple::aarch64_32:
1248         ostype = "ios";
1249         break;
1250       default:
1251         // No change.
1252         break;
1253       }
1254     }
1255     response.Printf("ostype:%s;", ostype.c_str());
1256 
1257     switch (proc_arch.GetByteOrder()) {
1258     case lldb::eByteOrderLittle:
1259       response.PutCString("endian:little;");
1260       break;
1261     case lldb::eByteOrderBig:
1262       response.PutCString("endian:big;");
1263       break;
1264     case lldb::eByteOrderPDP:
1265       response.PutCString("endian:pdp;");
1266       break;
1267     default:
1268       // Nothing.
1269       break;
1270     }
1271     // In case of MIPS64, pointer size is depend on ELF ABI For N32 the pointer
1272     // size is 4 and for N64 it is 8
1273     std::string abi = proc_arch.GetTargetABI();
1274     if (!abi.empty())
1275       response.Printf("elf_abi:%s;", abi.c_str());
1276     response.Printf("ptrsize:%d;", proc_arch.GetAddressByteSize());
1277   }
1278 }
1279 
1280 FileSpec GDBRemoteCommunicationServerCommon::FindModuleFile(
1281     const std::string &module_path, const ArchSpec &arch) {
1282 #ifdef __ANDROID__
1283   return HostInfoAndroid::ResolveLibraryPath(module_path, arch);
1284 #else
1285   FileSpec file_spec(module_path);
1286   FileSystem::Instance().Resolve(file_spec);
1287   return file_spec;
1288 #endif
1289 }
1290 
1291 ModuleSpec
1292 GDBRemoteCommunicationServerCommon::GetModuleInfo(llvm::StringRef module_path,
1293                                                   llvm::StringRef triple) {
1294   ArchSpec arch(triple);
1295 
1296   FileSpec req_module_path_spec(module_path);
1297   FileSystem::Instance().Resolve(req_module_path_spec);
1298 
1299   const FileSpec module_path_spec =
1300       FindModuleFile(req_module_path_spec.GetPath(), arch);
1301   const ModuleSpec module_spec(module_path_spec, arch);
1302 
1303   ModuleSpecList module_specs;
1304   if (!ObjectFile::GetModuleSpecifications(module_path_spec, 0, 0,
1305                                            module_specs))
1306     return ModuleSpec();
1307 
1308   ModuleSpec matched_module_spec;
1309   if (!module_specs.FindMatchingModuleSpec(module_spec, matched_module_spec))
1310     return ModuleSpec();
1311 
1312   return matched_module_spec;
1313 }
1314