Bug Summary

File:build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
Warning:line 517, column 13
Value stored to 'descriptor' during its initialization is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name GDBRemoteCommunicationServerCommon.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/build-llvm/tools/clang/stage2-bins -resource-dir /usr/lib/llvm-16/lib/clang/16.0.0 -isystem /usr/include/libxml2 -D HAVE_ROUND -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/lldb/source/Plugins/Process/gdb-remote -I /build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/lldb/source/Plugins/Process/gdb-remote -I /build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/lldb/include -I tools/lldb/include -I include -I /build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/llvm/include -I /usr/include/python3.9 -I /build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/clang/include -I tools/lldb/../clang/include -I /build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/lldb/source -I tools/lldb/source -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-16/lib/clang/16.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fmacro-prefix-map=/build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/= -O2 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -Wno-misleading-indentation -Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-strict-aliasing -Wno-stringop-truncation -std=c++17 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-10-03-140002-15933-1 -x c++ /build/llvm-toolchain-snapshot-16~++20221003111214+1fa2019828ca/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
1//===-- GDBRemoteCommunicationServerCommon.cpp ----------------------------===//
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 <cerrno>
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/LLDBLog.h"
34#include "lldb/Utility/Log.h"
35#include "lldb/Utility/StreamString.h"
36#include "lldb/Utility/StructuredData.h"
37#include "llvm/ADT/StringSwitch.h"
38#include "llvm/ADT/Triple.h"
39#include "llvm/Support/JSON.h"
40
41#include "ProcessGDBRemoteLog.h"
42#include "lldb/Utility/StringExtractorGDBRemote.h"
43
44#ifdef __ANDROID__
45#include "lldb/Host/android/HostInfoAndroid.h"
46#endif
47
48
49using namespace lldb;
50using namespace lldb_private::process_gdb_remote;
51using namespace lldb_private;
52
53#ifdef __ANDROID__
54const static uint32_t g_default_packet_timeout_sec = 20; // seconds
55#else
56const static uint32_t g_default_packet_timeout_sec = 0; // not specified
57#endif
58
59// GDBRemoteCommunicationServerCommon constructor
60GDBRemoteCommunicationServerCommon::GDBRemoteCommunicationServerCommon()
61 : GDBRemoteCommunicationServer(), m_process_launch_info(),
62 m_process_launch_error(), m_proc_infos(), m_proc_infos_index(0) {
63 RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_A,
64 &GDBRemoteCommunicationServerCommon::Handle_A);
65 RegisterMemberFunctionHandler(
66 StringExtractorGDBRemote::eServerPacketType_QEnvironment,
67 &GDBRemoteCommunicationServerCommon::Handle_QEnvironment);
68 RegisterMemberFunctionHandler(
69 StringExtractorGDBRemote::eServerPacketType_QEnvironmentHexEncoded,
70 &GDBRemoteCommunicationServerCommon::Handle_QEnvironmentHexEncoded);
71 RegisterMemberFunctionHandler(
72 StringExtractorGDBRemote::eServerPacketType_qfProcessInfo,
73 &GDBRemoteCommunicationServerCommon::Handle_qfProcessInfo);
74 RegisterMemberFunctionHandler(
75 StringExtractorGDBRemote::eServerPacketType_qGroupName,
76 &GDBRemoteCommunicationServerCommon::Handle_qGroupName);
77 RegisterMemberFunctionHandler(
78 StringExtractorGDBRemote::eServerPacketType_qHostInfo,
79 &GDBRemoteCommunicationServerCommon::Handle_qHostInfo);
80 RegisterMemberFunctionHandler(
81 StringExtractorGDBRemote::eServerPacketType_QLaunchArch,
82 &GDBRemoteCommunicationServerCommon::Handle_QLaunchArch);
83 RegisterMemberFunctionHandler(
84 StringExtractorGDBRemote::eServerPacketType_qLaunchSuccess,
85 &GDBRemoteCommunicationServerCommon::Handle_qLaunchSuccess);
86 RegisterMemberFunctionHandler(
87 StringExtractorGDBRemote::eServerPacketType_qEcho,
88 &GDBRemoteCommunicationServerCommon::Handle_qEcho);
89 RegisterMemberFunctionHandler(
90 StringExtractorGDBRemote::eServerPacketType_qModuleInfo,
91 &GDBRemoteCommunicationServerCommon::Handle_qModuleInfo);
92 RegisterMemberFunctionHandler(
93 StringExtractorGDBRemote::eServerPacketType_jModulesInfo,
94 &GDBRemoteCommunicationServerCommon::Handle_jModulesInfo);
95 RegisterMemberFunctionHandler(
96 StringExtractorGDBRemote::eServerPacketType_qPlatform_chmod,
97 &GDBRemoteCommunicationServerCommon::Handle_qPlatform_chmod);
98 RegisterMemberFunctionHandler(
99 StringExtractorGDBRemote::eServerPacketType_qPlatform_mkdir,
100 &GDBRemoteCommunicationServerCommon::Handle_qPlatform_mkdir);
101 RegisterMemberFunctionHandler(
102 StringExtractorGDBRemote::eServerPacketType_qPlatform_shell,
103 &GDBRemoteCommunicationServerCommon::Handle_qPlatform_shell);
104 RegisterMemberFunctionHandler(
105 StringExtractorGDBRemote::eServerPacketType_qProcessInfoPID,
106 &GDBRemoteCommunicationServerCommon::Handle_qProcessInfoPID);
107 RegisterMemberFunctionHandler(
108 StringExtractorGDBRemote::eServerPacketType_QSetDetachOnError,
109 &GDBRemoteCommunicationServerCommon::Handle_QSetDetachOnError);
110 RegisterMemberFunctionHandler(
111 StringExtractorGDBRemote::eServerPacketType_QSetSTDERR,
112 &GDBRemoteCommunicationServerCommon::Handle_QSetSTDERR);
113 RegisterMemberFunctionHandler(
114 StringExtractorGDBRemote::eServerPacketType_QSetSTDIN,
115 &GDBRemoteCommunicationServerCommon::Handle_QSetSTDIN);
116 RegisterMemberFunctionHandler(
117 StringExtractorGDBRemote::eServerPacketType_QSetSTDOUT,
118 &GDBRemoteCommunicationServerCommon::Handle_QSetSTDOUT);
119 RegisterMemberFunctionHandler(
120 StringExtractorGDBRemote::eServerPacketType_qSpeedTest,
121 &GDBRemoteCommunicationServerCommon::Handle_qSpeedTest);
122 RegisterMemberFunctionHandler(
123 StringExtractorGDBRemote::eServerPacketType_qsProcessInfo,
124 &GDBRemoteCommunicationServerCommon::Handle_qsProcessInfo);
125 RegisterMemberFunctionHandler(
126 StringExtractorGDBRemote::eServerPacketType_QStartNoAckMode,
127 &GDBRemoteCommunicationServerCommon::Handle_QStartNoAckMode);
128 RegisterMemberFunctionHandler(
129 StringExtractorGDBRemote::eServerPacketType_qSupported,
130 &GDBRemoteCommunicationServerCommon::Handle_qSupported);
131 RegisterMemberFunctionHandler(
132 StringExtractorGDBRemote::eServerPacketType_qUserName,
133 &GDBRemoteCommunicationServerCommon::Handle_qUserName);
134 RegisterMemberFunctionHandler(
135 StringExtractorGDBRemote::eServerPacketType_vFile_close,
136 &GDBRemoteCommunicationServerCommon::Handle_vFile_Close);
137 RegisterMemberFunctionHandler(
138 StringExtractorGDBRemote::eServerPacketType_vFile_exists,
139 &GDBRemoteCommunicationServerCommon::Handle_vFile_Exists);
140 RegisterMemberFunctionHandler(
141 StringExtractorGDBRemote::eServerPacketType_vFile_md5,
142 &GDBRemoteCommunicationServerCommon::Handle_vFile_MD5);
143 RegisterMemberFunctionHandler(
144 StringExtractorGDBRemote::eServerPacketType_vFile_mode,
145 &GDBRemoteCommunicationServerCommon::Handle_vFile_Mode);
146 RegisterMemberFunctionHandler(
147 StringExtractorGDBRemote::eServerPacketType_vFile_open,
148 &GDBRemoteCommunicationServerCommon::Handle_vFile_Open);
149 RegisterMemberFunctionHandler(
150 StringExtractorGDBRemote::eServerPacketType_vFile_pread,
151 &GDBRemoteCommunicationServerCommon::Handle_vFile_pRead);
152 RegisterMemberFunctionHandler(
153 StringExtractorGDBRemote::eServerPacketType_vFile_pwrite,
154 &GDBRemoteCommunicationServerCommon::Handle_vFile_pWrite);
155 RegisterMemberFunctionHandler(
156 StringExtractorGDBRemote::eServerPacketType_vFile_size,
157 &GDBRemoteCommunicationServerCommon::Handle_vFile_Size);
158 RegisterMemberFunctionHandler(
159 StringExtractorGDBRemote::eServerPacketType_vFile_fstat,
160 &GDBRemoteCommunicationServerCommon::Handle_vFile_FStat);
161 RegisterMemberFunctionHandler(
162 StringExtractorGDBRemote::eServerPacketType_vFile_stat,
163 &GDBRemoteCommunicationServerCommon::Handle_vFile_Stat);
164 RegisterMemberFunctionHandler(
165 StringExtractorGDBRemote::eServerPacketType_vFile_symlink,
166 &GDBRemoteCommunicationServerCommon::Handle_vFile_symlink);
167 RegisterMemberFunctionHandler(
168 StringExtractorGDBRemote::eServerPacketType_vFile_unlink,
169 &GDBRemoteCommunicationServerCommon::Handle_vFile_unlink);
170}
171
172// Destructor
173GDBRemoteCommunicationServerCommon::~GDBRemoteCommunicationServerCommon() =
174 default;
175
176GDBRemoteCommunication::PacketResult
177GDBRemoteCommunicationServerCommon::Handle_qHostInfo(
178 StringExtractorGDBRemote &packet) {
179 StreamString response;
180
181 // $cputype:16777223;cpusubtype:3;ostype:Darwin;vendor:apple;endian:little;ptrsize:8;#00
182
183 ArchSpec host_arch(HostInfo::GetArchitecture());
184 const llvm::Triple &host_triple = host_arch.GetTriple();
185 response.PutCString("triple:");
186 response.PutStringAsRawHex8(host_triple.getTriple());
187 response.Printf(";ptrsize:%u;", host_arch.GetAddressByteSize());
188
189 const char *distribution_id = host_arch.GetDistributionId().AsCString();
190 if (distribution_id) {
191 response.PutCString("distribution_id:");
192 response.PutStringAsRawHex8(distribution_id);
193 response.PutCString(";");
194 }
195
196#if defined(__APPLE__)
197 // For parity with debugserver, we'll include the vendor key.
198 response.PutCString("vendor:apple;");
199
200 // Send out MachO info.
201 uint32_t cpu = host_arch.GetMachOCPUType();
202 uint32_t sub = host_arch.GetMachOCPUSubType();
203 if (cpu != LLDB_INVALID_CPUTYPE(0xFFFFFFFEu))
204 response.Printf("cputype:%u;", cpu);
205 if (sub != LLDB_INVALID_CPUTYPE(0xFFFFFFFEu))
206 response.Printf("cpusubtype:%u;", sub);
207
208 if (cpu == llvm::MachO::CPU_TYPE_ARM || cpu == llvm::MachO::CPU_TYPE_ARM64) {
209// Indicate the OS type.
210#if defined(TARGET_OS_TV) && TARGET_OS_TV == 1
211 response.PutCString("ostype:tvos;");
212#elif defined(TARGET_OS_WATCH) && TARGET_OS_WATCH == 1
213 response.PutCString("ostype:watchos;");
214#elif defined(TARGET_OS_BRIDGE) && TARGET_OS_BRIDGE == 1
215 response.PutCString("ostype:bridgeos;");
216#else
217 response.PutCString("ostype:ios;");
218#endif
219
220 // On arm, we use "synchronous" watchpoints which means the exception is
221 // delivered before the instruction executes.
222 response.PutCString("watchpoint_exceptions_received:before;");
223 } else {
224 response.PutCString("ostype:macosx;");
225 response.Printf("watchpoint_exceptions_received:after;");
226 }
227
228#else
229 if (host_arch.GetMachine() == llvm::Triple::aarch64 ||
230 host_arch.GetMachine() == llvm::Triple::aarch64_32 ||
231 host_arch.GetMachine() == llvm::Triple::aarch64_be ||
232 host_arch.GetMachine() == llvm::Triple::arm ||
233 host_arch.GetMachine() == llvm::Triple::armeb || host_arch.IsMIPS())
234 response.Printf("watchpoint_exceptions_received:before;");
235 else
236 response.Printf("watchpoint_exceptions_received:after;");
237#endif
238
239 switch (endian::InlHostByteOrder()) {
240 case eByteOrderBig:
241 response.PutCString("endian:big;");
242 break;
243 case eByteOrderLittle:
244 response.PutCString("endian:little;");
245 break;
246 case eByteOrderPDP:
247 response.PutCString("endian:pdp;");
248 break;
249 default:
250 response.PutCString("endian:unknown;");
251 break;
252 }
253
254 llvm::VersionTuple version = HostInfo::GetOSVersion();
255 if (!version.empty()) {
256 response.Format("os_version:{0}", version.getAsString());
257 response.PutChar(';');
258 }
259
260#if defined(__APPLE__)
261 llvm::VersionTuple maccatalyst_version = HostInfo::GetMacCatalystVersion();
262 if (!maccatalyst_version.empty()) {
263 response.Format("maccatalyst_version:{0}",
264 maccatalyst_version.getAsString());
265 response.PutChar(';');
266 }
267#endif
268
269 if (llvm::Optional<std::string> s = HostInfo::GetOSBuildString()) {
270 response.PutCString("os_build:");
271 response.PutStringAsRawHex8(*s);
272 response.PutChar(';');
273 }
274 if (llvm::Optional<std::string> s = HostInfo::GetOSKernelDescription()) {
275 response.PutCString("os_kernel:");
276 response.PutStringAsRawHex8(*s);
277 response.PutChar(';');
278 }
279
280 std::string s;
281#if defined(__APPLE__)
282
283#if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
284 // For iOS devices, we are connected through a USB Mux so we never pretend to
285 // actually have a hostname as far as the remote lldb that is connecting to
286 // this lldb-platform is concerned
287 response.PutCString("hostname:");
288 response.PutStringAsRawHex8("127.0.0.1");
289 response.PutChar(';');
290#else // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
291 if (HostInfo::GetHostname(s)) {
292 response.PutCString("hostname:");
293 response.PutStringAsRawHex8(s);
294 response.PutChar(';');
295 }
296#endif // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
297
298#else // #if defined(__APPLE__)
299 if (HostInfo::GetHostname(s)) {
300 response.PutCString("hostname:");
301 response.PutStringAsRawHex8(s);
302 response.PutChar(';');
303 }
304#endif // #if defined(__APPLE__)
305 // coverity[unsigned_compare]
306 if (g_default_packet_timeout_sec > 0)
307 response.Printf("default_packet_timeout:%u;", g_default_packet_timeout_sec);
308
309 return SendPacketNoLock(response.GetString());
310}
311
312GDBRemoteCommunication::PacketResult
313GDBRemoteCommunicationServerCommon::Handle_qProcessInfoPID(
314 StringExtractorGDBRemote &packet) {
315 // Packet format: "qProcessInfoPID:%i" where %i is the pid
316 packet.SetFilePos(::strlen("qProcessInfoPID:"));
317 lldb::pid_t pid = packet.GetU32(LLDB_INVALID_PROCESS_ID0);
318 if (pid != LLDB_INVALID_PROCESS_ID0) {
319 ProcessInstanceInfo proc_info;
320 if (Host::GetProcessInfo(pid, proc_info)) {
321 StreamString response;
322 CreateProcessInfoResponse(proc_info, response);
323 return SendPacketNoLock(response.GetString());
324 }
325 }
326 return SendErrorResponse(1);
327}
328
329GDBRemoteCommunication::PacketResult
330GDBRemoteCommunicationServerCommon::Handle_qfProcessInfo(
331 StringExtractorGDBRemote &packet) {
332 m_proc_infos_index = 0;
333 m_proc_infos.clear();
334
335 ProcessInstanceInfoMatch match_info;
336 packet.SetFilePos(::strlen("qfProcessInfo"));
337 if (packet.GetChar() == ':') {
338 llvm::StringRef key;
339 llvm::StringRef value;
340 while (packet.GetNameColonValue(key, value)) {
341 bool success = true;
342 if (key.equals("name")) {
343 StringExtractor extractor(value);
344 std::string file;
345 extractor.GetHexByteString(file);
346 match_info.GetProcessInfo().GetExecutableFile().SetFile(
347 file, FileSpec::Style::native);
348 } else if (key.equals("name_match")) {
349 NameMatch name_match = llvm::StringSwitch<NameMatch>(value)
350 .Case("equals", NameMatch::Equals)
351 .Case("starts_with", NameMatch::StartsWith)
352 .Case("ends_with", NameMatch::EndsWith)
353 .Case("contains", NameMatch::Contains)
354 .Case("regex", NameMatch::RegularExpression)
355 .Default(NameMatch::Ignore);
356 match_info.SetNameMatchType(name_match);
357 if (name_match == NameMatch::Ignore)
358 return SendErrorResponse(2);
359 } else if (key.equals("pid")) {
360 lldb::pid_t pid = LLDB_INVALID_PROCESS_ID0;
361 if (value.getAsInteger(0, pid))
362 return SendErrorResponse(2);
363 match_info.GetProcessInfo().SetProcessID(pid);
364 } else if (key.equals("parent_pid")) {
365 lldb::pid_t pid = LLDB_INVALID_PROCESS_ID0;
366 if (value.getAsInteger(0, pid))
367 return SendErrorResponse(2);
368 match_info.GetProcessInfo().SetParentProcessID(pid);
369 } else if (key.equals("uid")) {
370 uint32_t uid = UINT32_MAX(4294967295U);
371 if (value.getAsInteger(0, uid))
372 return SendErrorResponse(2);
373 match_info.GetProcessInfo().SetUserID(uid);
374 } else if (key.equals("gid")) {
375 uint32_t gid = UINT32_MAX(4294967295U);
376 if (value.getAsInteger(0, gid))
377 return SendErrorResponse(2);
378 match_info.GetProcessInfo().SetGroupID(gid);
379 } else if (key.equals("euid")) {
380 uint32_t uid = UINT32_MAX(4294967295U);
381 if (value.getAsInteger(0, uid))
382 return SendErrorResponse(2);
383 match_info.GetProcessInfo().SetEffectiveUserID(uid);
384 } else if (key.equals("egid")) {
385 uint32_t gid = UINT32_MAX(4294967295U);
386 if (value.getAsInteger(0, gid))
387 return SendErrorResponse(2);
388 match_info.GetProcessInfo().SetEffectiveGroupID(gid);
389 } else if (key.equals("all_users")) {
390 match_info.SetMatchAllUsers(
391 OptionArgParser::ToBoolean(value, false, &success));
392 } else if (key.equals("triple")) {
393 match_info.GetProcessInfo().GetArchitecture() =
394 HostInfo::GetAugmentedArchSpec(value);
395 } else {
396 success = false;
397 }
398
399 if (!success)
400 return SendErrorResponse(2);
401 }
402 }
403
404 if (Host::FindProcesses(match_info, m_proc_infos)) {
405 // We found something, return the first item by calling the get subsequent
406 // process info packet handler...
407 return Handle_qsProcessInfo(packet);
408 }
409 return SendErrorResponse(3);
410}
411
412GDBRemoteCommunication::PacketResult
413GDBRemoteCommunicationServerCommon::Handle_qsProcessInfo(
414 StringExtractorGDBRemote &packet) {
415 if (m_proc_infos_index < m_proc_infos.size()) {
416 StreamString response;
417 CreateProcessInfoResponse(m_proc_infos[m_proc_infos_index], response);
418 ++m_proc_infos_index;
419 return SendPacketNoLock(response.GetString());
420 }
421 return SendErrorResponse(4);
422}
423
424GDBRemoteCommunication::PacketResult
425GDBRemoteCommunicationServerCommon::Handle_qUserName(
426 StringExtractorGDBRemote &packet) {
427#if LLDB_ENABLE_POSIX1
428 Log *log = GetLog(LLDBLog::Process);
429 LLDB_LOGF(log, "GDBRemoteCommunicationServerCommon::%s begin", __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationServerCommon::%s begin"
, __FUNCTION__); } while (0)
;
430
431 // Packet format: "qUserName:%i" where %i is the uid
432 packet.SetFilePos(::strlen("qUserName:"));
433 uint32_t uid = packet.GetU32(UINT32_MAX(4294967295U));
434 if (uid != UINT32_MAX(4294967295U)) {
435 if (llvm::Optional<llvm::StringRef> name =
436 HostInfo::GetUserIDResolver().GetUserName(uid)) {
437 StreamString response;
438 response.PutStringAsRawHex8(*name);
439 return SendPacketNoLock(response.GetString());
440 }
441 }
442 LLDB_LOGF(log, "GDBRemoteCommunicationServerCommon::%s end", __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationServerCommon::%s end"
, __FUNCTION__); } while (0)
;
443#endif
444 return SendErrorResponse(5);
445}
446
447GDBRemoteCommunication::PacketResult
448GDBRemoteCommunicationServerCommon::Handle_qGroupName(
449 StringExtractorGDBRemote &packet) {
450#if LLDB_ENABLE_POSIX1
451 // Packet format: "qGroupName:%i" where %i is the gid
452 packet.SetFilePos(::strlen("qGroupName:"));
453 uint32_t gid = packet.GetU32(UINT32_MAX(4294967295U));
454 if (gid != UINT32_MAX(4294967295U)) {
455 if (llvm::Optional<llvm::StringRef> name =
456 HostInfo::GetUserIDResolver().GetGroupName(gid)) {
457 StreamString response;
458 response.PutStringAsRawHex8(*name);
459 return SendPacketNoLock(response.GetString());
460 }
461 }
462#endif
463 return SendErrorResponse(6);
464}
465
466GDBRemoteCommunication::PacketResult
467GDBRemoteCommunicationServerCommon::Handle_qSpeedTest(
468 StringExtractorGDBRemote &packet) {
469 packet.SetFilePos(::strlen("qSpeedTest:"));
470
471 llvm::StringRef key;
472 llvm::StringRef value;
473 bool success = packet.GetNameColonValue(key, value);
474 if (success && key.equals("response_size")) {
475 uint32_t response_size = 0;
476 if (!value.getAsInteger(0, response_size)) {
477 if (response_size == 0)
478 return SendOKResponse();
479 StreamString response;
480 uint32_t bytes_left = response_size;
481 response.PutCString("data:");
482 while (bytes_left > 0) {
483 if (bytes_left >= 26) {
484 response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
485 bytes_left -= 26;
486 } else {
487 response.Printf("%*.*s;", bytes_left, bytes_left,
488 "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
489 bytes_left = 0;
490 }
491 }
492 return SendPacketNoLock(response.GetString());
493 }
494 }
495 return SendErrorResponse(7);
496}
497
498GDBRemoteCommunication::PacketResult
499GDBRemoteCommunicationServerCommon::Handle_vFile_Open(
500 StringExtractorGDBRemote &packet) {
501 packet.SetFilePos(::strlen("vFile:open:"));
502 std::string path;
503 packet.GetHexByteStringTerminatedBy(path, ',');
504 if (!path.empty()) {
505 if (packet.GetChar() == ',') {
506 auto flags = File::OpenOptions(packet.GetHexMaxU32(false, 0));
507 if (packet.GetChar() == ',') {
508 mode_t mode = packet.GetHexMaxU32(false, 0600);
509 FileSpec path_spec(path);
510 FileSystem::Instance().Resolve(path_spec);
511 // Do not close fd.
512 auto file = FileSystem::Instance().Open(path_spec, flags, mode, false);
513
514 StreamString response;
515 response.PutChar('F');
516
517 int descriptor = File::kInvalidDescriptor;
Value stored to 'descriptor' during its initialization is never read
518 if (file) {
519 descriptor = file.get()->GetDescriptor();
520 response.Printf("%x", descriptor);
521 } else {
522 response.PutCString("-1");
523 std::error_code code = errorToErrorCode(file.takeError());
524 if (code.category() == std::system_category()) {
525 response.Printf(",%x", code.value());
526 }
527 }
528
529 return SendPacketNoLock(response.GetString());
530 }
531 }
532 }
533 return SendErrorResponse(18);
534}
535
536static GDBErrno system_errno_to_gdb(int err) {
537 switch (err) {
538#define HANDLE_ERRNO(name, value) \
539 case name: \
540 return GDB_##name;
541#include "Plugins/Process/gdb-remote/GDBRemoteErrno.def"
542 default:
543 return GDB_EUNKNOWN;
544 }
545}
546
547GDBRemoteCommunication::PacketResult
548GDBRemoteCommunicationServerCommon::Handle_vFile_Close(
549 StringExtractorGDBRemote &packet) {
550 packet.SetFilePos(::strlen("vFile:close:"));
551 int fd = packet.GetS32(-1, 16);
552 int err = -1;
553 int save_errno = 0;
554 if (fd >= 0) {
555 NativeFile file(fd, File::OpenOptions(0), true);
556 Status error = file.Close();
557 err = 0;
558 save_errno = error.GetError();
559 } else {
560 save_errno = EINVAL22;
561 }
562 StreamString response;
563 response.PutChar('F');
564 response.Printf("%x", err);
565 if (save_errno)
566 response.Printf(",%x", system_errno_to_gdb(save_errno));
567 return SendPacketNoLock(response.GetString());
568}
569
570GDBRemoteCommunication::PacketResult
571GDBRemoteCommunicationServerCommon::Handle_vFile_pRead(
572 StringExtractorGDBRemote &packet) {
573 StreamGDBRemote response;
574 packet.SetFilePos(::strlen("vFile:pread:"));
575 int fd = packet.GetS32(-1, 16);
576 if (packet.GetChar() == ',') {
577 size_t count = packet.GetHexMaxU64(false, SIZE_MAX(18446744073709551615UL));
578 if (packet.GetChar() == ',') {
579 off_t offset = packet.GetHexMaxU32(false, UINT32_MAX(4294967295U));
580 if (count == SIZE_MAX(18446744073709551615UL)) {
581 response.Printf("F-1:%x", EINVAL22);
582 return SendPacketNoLock(response.GetString());
583 }
584
585 std::string buffer(count, 0);
586 NativeFile file(fd, File::eOpenOptionReadOnly, false);
587 Status error = file.Read(static_cast<void *>(&buffer[0]), count, offset);
588 const int save_errno = error.GetError();
589 response.PutChar('F');
590 if (error.Success()) {
591 response.Printf("%zx", count);
592 response.PutChar(';');
593 response.PutEscapedBytes(&buffer[0], count);
594 } else {
595 response.PutCString("-1");
596 if (save_errno)
597 response.Printf(",%x", system_errno_to_gdb(save_errno));
598 }
599 return SendPacketNoLock(response.GetString());
600 }
601 }
602 return SendErrorResponse(21);
603}
604
605GDBRemoteCommunication::PacketResult
606GDBRemoteCommunicationServerCommon::Handle_vFile_pWrite(
607 StringExtractorGDBRemote &packet) {
608 packet.SetFilePos(::strlen("vFile:pwrite:"));
609
610 StreamGDBRemote response;
611 response.PutChar('F');
612
613 int fd = packet.GetS32(-1, 16);
614 if (packet.GetChar() == ',') {
615 off_t offset = packet.GetHexMaxU32(false, UINT32_MAX(4294967295U));
616 if (packet.GetChar() == ',') {
617 std::string buffer;
618 if (packet.GetEscapedBinaryData(buffer)) {
619 NativeFile file(fd, File::eOpenOptionWriteOnly, false);
620 size_t count = buffer.size();
621 Status error =
622 file.Write(static_cast<const void *>(&buffer[0]), count, offset);
623 const int save_errno = error.GetError();
624 if (error.Success())
625 response.Printf("%zx", count);
626 else {
627 response.PutCString("-1");
628 if (save_errno)
629 response.Printf(",%x", system_errno_to_gdb(save_errno));
630 }
631 } else {
632 response.Printf("-1,%x", EINVAL22);
633 }
634 return SendPacketNoLock(response.GetString());
635 }
636 }
637 return SendErrorResponse(27);
638}
639
640GDBRemoteCommunication::PacketResult
641GDBRemoteCommunicationServerCommon::Handle_vFile_Size(
642 StringExtractorGDBRemote &packet) {
643 packet.SetFilePos(::strlen("vFile:size:"));
644 std::string path;
645 packet.GetHexByteString(path);
646 if (!path.empty()) {
647 uint64_t Size;
648 if (llvm::sys::fs::file_size(path, Size))
649 return SendErrorResponse(5);
650 StreamString response;
651 response.PutChar('F');
652 response.PutHex64(Size);
653 if (Size == UINT64_MAX(18446744073709551615UL)) {
654 response.PutChar(',');
655 response.PutHex64(Size); // TODO: replace with Host::GetSyswideErrorCode()
656 }
657 return SendPacketNoLock(response.GetString());
658 }
659 return SendErrorResponse(22);
660}
661
662GDBRemoteCommunication::PacketResult
663GDBRemoteCommunicationServerCommon::Handle_vFile_Mode(
664 StringExtractorGDBRemote &packet) {
665 packet.SetFilePos(::strlen("vFile:mode:"));
666 std::string path;
667 packet.GetHexByteString(path);
668 if (!path.empty()) {
669 FileSpec file_spec(path);
670 FileSystem::Instance().Resolve(file_spec);
671 std::error_code ec;
672 const uint32_t mode = FileSystem::Instance().GetPermissions(file_spec, ec);
673 StreamString response;
674 if (mode != llvm::sys::fs::perms_not_known)
675 response.Printf("F%x", mode);
676 else
677 response.Printf("F-1,%x", (int)Status(ec).GetError());
678 return SendPacketNoLock(response.GetString());
679 }
680 return SendErrorResponse(23);
681}
682
683GDBRemoteCommunication::PacketResult
684GDBRemoteCommunicationServerCommon::Handle_vFile_Exists(
685 StringExtractorGDBRemote &packet) {
686 packet.SetFilePos(::strlen("vFile:exists:"));
687 std::string path;
688 packet.GetHexByteString(path);
689 if (!path.empty()) {
690 bool retcode = llvm::sys::fs::exists(path);
691 StreamString response;
692 response.PutChar('F');
693 response.PutChar(',');
694 if (retcode)
695 response.PutChar('1');
696 else
697 response.PutChar('0');
698 return SendPacketNoLock(response.GetString());
699 }
700 return SendErrorResponse(24);
701}
702
703GDBRemoteCommunication::PacketResult
704GDBRemoteCommunicationServerCommon::Handle_vFile_symlink(
705 StringExtractorGDBRemote &packet) {
706 packet.SetFilePos(::strlen("vFile:symlink:"));
707 std::string dst, src;
708 packet.GetHexByteStringTerminatedBy(dst, ',');
709 packet.GetChar(); // Skip ',' char
710 packet.GetHexByteString(src);
711
712 FileSpec src_spec(src);
713 FileSystem::Instance().Resolve(src_spec);
714 Status error = FileSystem::Instance().Symlink(src_spec, FileSpec(dst));
715
716 StreamString response;
717 response.Printf("F%x,%x", error.GetError(), error.GetError());
718 return SendPacketNoLock(response.GetString());
719}
720
721GDBRemoteCommunication::PacketResult
722GDBRemoteCommunicationServerCommon::Handle_vFile_unlink(
723 StringExtractorGDBRemote &packet) {
724 packet.SetFilePos(::strlen("vFile:unlink:"));
725 std::string path;
726 packet.GetHexByteString(path);
727 Status error(llvm::sys::fs::remove(path));
728 StreamString response;
729 response.Printf("F%x,%x", error.GetError(), error.GetError());
730 return SendPacketNoLock(response.GetString());
731}
732
733GDBRemoteCommunication::PacketResult
734GDBRemoteCommunicationServerCommon::Handle_qPlatform_shell(
735 StringExtractorGDBRemote &packet) {
736 packet.SetFilePos(::strlen("qPlatform_shell:"));
737 std::string path;
738 std::string working_dir;
739 packet.GetHexByteStringTerminatedBy(path, ',');
740 if (!path.empty()) {
741 if (packet.GetChar() == ',') {
742 // FIXME: add timeout to qPlatform_shell packet
743 // uint32_t timeout = packet.GetHexMaxU32(false, 32);
744 if (packet.GetChar() == ',')
745 packet.GetHexByteString(working_dir);
746 int status, signo;
747 std::string output;
748 FileSpec working_spec(working_dir);
749 FileSystem::Instance().Resolve(working_spec);
750 Status err =
751 Host::RunShellCommand(path.c_str(), working_spec, &status, &signo,
752 &output, std::chrono::seconds(10));
753 StreamGDBRemote response;
754 if (err.Fail()) {
755 response.PutCString("F,");
756 response.PutHex32(UINT32_MAX(4294967295U));
757 } else {
758 response.PutCString("F,");
759 response.PutHex32(status);
760 response.PutChar(',');
761 response.PutHex32(signo);
762 response.PutChar(',');
763 response.PutEscapedBytes(output.c_str(), output.size());
764 }
765 return SendPacketNoLock(response.GetString());
766 }
767 }
768 return SendErrorResponse(24);
769}
770
771template <typename T, typename U>
772static void fill_clamp(T &dest, U src, typename T::value_type fallback) {
773 static_assert(std::is_unsigned<typename T::value_type>::value,
774 "Destination type must be unsigned.");
775 using UU = std::make_unsigned_t<U>;
776 constexpr auto T_max = std::numeric_limits<typename T::value_type>::max();
777 dest = src >= 0 && static_cast<UU>(src) <= T_max ? src : fallback;
778}
779
780GDBRemoteCommunication::PacketResult
781GDBRemoteCommunicationServerCommon::Handle_vFile_FStat(
782 StringExtractorGDBRemote &packet) {
783 StreamGDBRemote response;
784 packet.SetFilePos(::strlen("vFile:fstat:"));
785 int fd = packet.GetS32(-1, 16);
786
787 struct stat file_stats;
788 if (::fstat(fd, &file_stats) == -1) {
789 const int save_errno = errno(*__errno_location ());
790 response.Printf("F-1,%x", system_errno_to_gdb(save_errno));
791 return SendPacketNoLock(response.GetString());
792 }
793
794 GDBRemoteFStatData data;
795 fill_clamp(data.gdb_st_dev, file_stats.st_dev, 0);
796 fill_clamp(data.gdb_st_ino, file_stats.st_ino, 0);
797 data.gdb_st_mode = file_stats.st_mode;
798 fill_clamp(data.gdb_st_nlink, file_stats.st_nlink, UINT32_MAX(4294967295U));
799 fill_clamp(data.gdb_st_uid, file_stats.st_uid, 0);
800 fill_clamp(data.gdb_st_gid, file_stats.st_gid, 0);
801 fill_clamp(data.gdb_st_rdev, file_stats.st_rdev, 0);
802 data.gdb_st_size = file_stats.st_size;
803#if !defined(_WIN32)
804 data.gdb_st_blksize = file_stats.st_blksize;
805 data.gdb_st_blocks = file_stats.st_blocks;
806#else
807 data.gdb_st_blksize = 0;
808 data.gdb_st_blocks = 0;
809#endif
810 fill_clamp(data.gdb_st_atime, file_stats.st_atimest_atim.tv_sec, 0);
811 fill_clamp(data.gdb_st_mtime, file_stats.st_mtimest_mtim.tv_sec, 0);
812 fill_clamp(data.gdb_st_ctime, file_stats.st_ctimest_ctim.tv_sec, 0);
813
814 response.Printf("F%zx;", sizeof(data));
815 response.PutEscapedBytes(&data, sizeof(data));
816 return SendPacketNoLock(response.GetString());
817}
818
819GDBRemoteCommunication::PacketResult
820GDBRemoteCommunicationServerCommon::Handle_vFile_Stat(
821 StringExtractorGDBRemote &packet) {
822 return SendUnimplementedResponse(
823 "GDBRemoteCommunicationServerCommon::Handle_vFile_Stat() unimplemented");
824}
825
826GDBRemoteCommunication::PacketResult
827GDBRemoteCommunicationServerCommon::Handle_vFile_MD5(
828 StringExtractorGDBRemote &packet) {
829 packet.SetFilePos(::strlen("vFile:MD5:"));
830 std::string path;
831 packet.GetHexByteString(path);
832 if (!path.empty()) {
833 StreamGDBRemote response;
834 auto Result = llvm::sys::fs::md5_contents(path);
835 if (!Result) {
836 response.PutCString("F,");
837 response.PutCString("x");
838 } else {
839 response.PutCString("F,");
840 response.PutHex64(Result->low());
841 response.PutHex64(Result->high());
842 }
843 return SendPacketNoLock(response.GetString());
844 }
845 return SendErrorResponse(25);
846}
847
848GDBRemoteCommunication::PacketResult
849GDBRemoteCommunicationServerCommon::Handle_qPlatform_mkdir(
850 StringExtractorGDBRemote &packet) {
851 packet.SetFilePos(::strlen("qPlatform_mkdir:"));
852 mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX(4294967295U));
853 if (packet.GetChar() == ',') {
854 std::string path;
855 packet.GetHexByteString(path);
856 Status error(llvm::sys::fs::create_directory(path, mode));
857
858 StreamGDBRemote response;
859 response.Printf("F%x", error.GetError());
860
861 return SendPacketNoLock(response.GetString());
862 }
863 return SendErrorResponse(20);
864}
865
866GDBRemoteCommunication::PacketResult
867GDBRemoteCommunicationServerCommon::Handle_qPlatform_chmod(
868 StringExtractorGDBRemote &packet) {
869 packet.SetFilePos(::strlen("qPlatform_chmod:"));
870
871 auto perms =
872 static_cast<llvm::sys::fs::perms>(packet.GetHexMaxU32(false, UINT32_MAX(4294967295U)));
873 if (packet.GetChar() == ',') {
874 std::string path;
875 packet.GetHexByteString(path);
876 Status error(llvm::sys::fs::setPermissions(path, perms));
877
878 StreamGDBRemote response;
879 response.Printf("F%x", error.GetError());
880
881 return SendPacketNoLock(response.GetString());
882 }
883 return SendErrorResponse(19);
884}
885
886GDBRemoteCommunication::PacketResult
887GDBRemoteCommunicationServerCommon::Handle_qSupported(
888 StringExtractorGDBRemote &packet) {
889 // Parse client-indicated features.
890 llvm::SmallVector<llvm::StringRef, 4> client_features;
891 packet.GetStringRef().split(client_features, ';');
892 return SendPacketNoLock(llvm::join(HandleFeatures(client_features), ";"));
893}
894
895GDBRemoteCommunication::PacketResult
896GDBRemoteCommunicationServerCommon::Handle_QSetDetachOnError(
897 StringExtractorGDBRemote &packet) {
898 packet.SetFilePos(::strlen("QSetDetachOnError:"));
899 if (packet.GetU32(0))
900 m_process_launch_info.GetFlags().Set(eLaunchFlagDetachOnError);
901 else
902 m_process_launch_info.GetFlags().Clear(eLaunchFlagDetachOnError);
903 return SendOKResponse();
904}
905
906GDBRemoteCommunication::PacketResult
907GDBRemoteCommunicationServerCommon::Handle_QStartNoAckMode(
908 StringExtractorGDBRemote &packet) {
909 // Send response first before changing m_send_acks to we ack this packet
910 PacketResult packet_result = SendOKResponse();
911 m_send_acks = false;
912 return packet_result;
913}
914
915GDBRemoteCommunication::PacketResult
916GDBRemoteCommunicationServerCommon::Handle_QSetSTDIN(
917 StringExtractorGDBRemote &packet) {
918 packet.SetFilePos(::strlen("QSetSTDIN:"));
919 FileAction file_action;
920 std::string path;
921 packet.GetHexByteString(path);
922 const bool read = true;
923 const bool write = false;
924 if (file_action.Open(STDIN_FILENO0, FileSpec(path), read, write)) {
925 m_process_launch_info.AppendFileAction(file_action);
926 return SendOKResponse();
927 }
928 return SendErrorResponse(15);
929}
930
931GDBRemoteCommunication::PacketResult
932GDBRemoteCommunicationServerCommon::Handle_QSetSTDOUT(
933 StringExtractorGDBRemote &packet) {
934 packet.SetFilePos(::strlen("QSetSTDOUT:"));
935 FileAction file_action;
936 std::string path;
937 packet.GetHexByteString(path);
938 const bool read = false;
939 const bool write = true;
940 if (file_action.Open(STDOUT_FILENO1, FileSpec(path), read, write)) {
941 m_process_launch_info.AppendFileAction(file_action);
942 return SendOKResponse();
943 }
944 return SendErrorResponse(16);
945}
946
947GDBRemoteCommunication::PacketResult
948GDBRemoteCommunicationServerCommon::Handle_QSetSTDERR(
949 StringExtractorGDBRemote &packet) {
950 packet.SetFilePos(::strlen("QSetSTDERR:"));
951 FileAction file_action;
952 std::string path;
953 packet.GetHexByteString(path);
954 const bool read = false;
955 const bool write = true;
956 if (file_action.Open(STDERR_FILENO2, FileSpec(path), read, write)) {
957 m_process_launch_info.AppendFileAction(file_action);
958 return SendOKResponse();
959 }
960 return SendErrorResponse(17);
961}
962
963GDBRemoteCommunication::PacketResult
964GDBRemoteCommunicationServerCommon::Handle_qLaunchSuccess(
965 StringExtractorGDBRemote &packet) {
966 if (m_process_launch_error.Success())
967 return SendOKResponse();
968 StreamString response;
969 response.PutChar('E');
970 response.PutCString(m_process_launch_error.AsCString("<unknown error>"));
971 return SendPacketNoLock(response.GetString());
972}
973
974GDBRemoteCommunication::PacketResult
975GDBRemoteCommunicationServerCommon::Handle_QEnvironment(
976 StringExtractorGDBRemote &packet) {
977 packet.SetFilePos(::strlen("QEnvironment:"));
978 const uint32_t bytes_left = packet.GetBytesLeft();
979 if (bytes_left > 0) {
980 m_process_launch_info.GetEnvironment().insert(packet.Peek());
981 return SendOKResponse();
982 }
983 return SendErrorResponse(12);
984}
985
986GDBRemoteCommunication::PacketResult
987GDBRemoteCommunicationServerCommon::Handle_QEnvironmentHexEncoded(
988 StringExtractorGDBRemote &packet) {
989 packet.SetFilePos(::strlen("QEnvironmentHexEncoded:"));
990 const uint32_t bytes_left = packet.GetBytesLeft();
991 if (bytes_left > 0) {
992 std::string str;
993 packet.GetHexByteString(str);
994 m_process_launch_info.GetEnvironment().insert(str);
995 return SendOKResponse();
996 }
997 return SendErrorResponse(12);
998}
999
1000GDBRemoteCommunication::PacketResult
1001GDBRemoteCommunicationServerCommon::Handle_QLaunchArch(
1002 StringExtractorGDBRemote &packet) {
1003 packet.SetFilePos(::strlen("QLaunchArch:"));
1004 const uint32_t bytes_left = packet.GetBytesLeft();
1005 if (bytes_left > 0) {
1006 const char *arch_triple = packet.Peek();
1007 m_process_launch_info.SetArchitecture(
1008 HostInfo::GetAugmentedArchSpec(arch_triple));
1009 return SendOKResponse();
1010 }
1011 return SendErrorResponse(13);
1012}
1013
1014GDBRemoteCommunication::PacketResult
1015GDBRemoteCommunicationServerCommon::Handle_A(StringExtractorGDBRemote &packet) {
1016 // The 'A' packet is the most over designed packet ever here with redundant
1017 // argument indexes, redundant argument lengths and needed hex encoded
1018 // argument string values. Really all that is needed is a comma separated hex
1019 // encoded argument value list, but we will stay true to the documented
1020 // version of the 'A' packet here...
1021
1022 Log *log = GetLog(LLDBLog::Process);
1023 int actual_arg_index = 0;
1024
1025 packet.SetFilePos(1); // Skip the 'A'
1026 bool success = true;
1027 while (success && packet.GetBytesLeft() > 0) {
1028 // Decode the decimal argument string length. This length is the number of
1029 // hex nibbles in the argument string value.
1030 const uint32_t arg_len = packet.GetU32(UINT32_MAX(4294967295U));
1031 if (arg_len == UINT32_MAX(4294967295U))
1032 success = false;
1033 else {
1034 // Make sure the argument hex string length is followed by a comma
1035 if (packet.GetChar() != ',')
1036 success = false;
1037 else {
1038 // Decode the argument index. We ignore this really because who would
1039 // really send down the arguments in a random order???
1040 const uint32_t arg_idx = packet.GetU32(UINT32_MAX(4294967295U));
1041 if (arg_idx == UINT32_MAX(4294967295U))
1042 success = false;
1043 else {
1044 // Make sure the argument index is followed by a comma
1045 if (packet.GetChar() != ',')
1046 success = false;
1047 else {
1048 // Decode the argument string value from hex bytes back into a UTF8
1049 // string and make sure the length matches the one supplied in the
1050 // packet
1051 std::string arg;
1052 if (packet.GetHexByteStringFixedLength(arg, arg_len) !=
1053 (arg_len / 2))
1054 success = false;
1055 else {
1056 // If there are any bytes left
1057 if (packet.GetBytesLeft()) {
1058 if (packet.GetChar() != ',')
1059 success = false;
1060 }
1061
1062 if (success) {
1063 if (arg_idx == 0)
1064 m_process_launch_info.GetExecutableFile().SetFile(
1065 arg, FileSpec::Style::native);
1066 m_process_launch_info.GetArguments().AppendArgument(arg);
1067 LLDB_LOGF(log, "LLGSPacketHandler::%s added arg %d: \"%s\"",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("LLGSPacketHandler::%s added arg %d: \"%s\""
, __FUNCTION__, actual_arg_index, arg.c_str()); } while (0)
1068 __FUNCTION__, actual_arg_index, arg.c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("LLGSPacketHandler::%s added arg %d: \"%s\""
, __FUNCTION__, actual_arg_index, arg.c_str()); } while (0)
;
1069 ++actual_arg_index;
1070 }
1071 }
1072 }
1073 }
1074 }
1075 }
1076 }
1077
1078 if (success) {
1079 m_process_launch_error = LaunchProcess();
1080 if (m_process_launch_error.Success())
1081 return SendOKResponse();
1082 LLDB_LOG(log, "failed to launch exe: {0}", m_process_launch_error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp"
, __func__, "failed to launch exe: {0}", m_process_launch_error
); } while (0)
;
1083 }
1084 return SendErrorResponse(8);
1085}
1086
1087GDBRemoteCommunication::PacketResult
1088GDBRemoteCommunicationServerCommon::Handle_qEcho(
1089 StringExtractorGDBRemote &packet) {
1090 // Just echo back the exact same packet for qEcho...
1091 return SendPacketNoLock(packet.GetStringRef());
1092}
1093
1094GDBRemoteCommunication::PacketResult
1095GDBRemoteCommunicationServerCommon::Handle_qModuleInfo(
1096 StringExtractorGDBRemote &packet) {
1097 packet.SetFilePos(::strlen("qModuleInfo:"));
1098
1099 std::string module_path;
1100 packet.GetHexByteStringTerminatedBy(module_path, ';');
1101 if (module_path.empty())
1102 return SendErrorResponse(1);
1103
1104 if (packet.GetChar() != ';')
1105 return SendErrorResponse(2);
1106
1107 std::string triple;
1108 packet.GetHexByteString(triple);
1109
1110 ModuleSpec matched_module_spec = GetModuleInfo(module_path, triple);
1111 if (!matched_module_spec.GetFileSpec())
1112 return SendErrorResponse(3);
1113
1114 const auto file_offset = matched_module_spec.GetObjectOffset();
1115 const auto file_size = matched_module_spec.GetObjectSize();
1116 const auto uuid_str = matched_module_spec.GetUUID().GetAsString("");
1117
1118 StreamGDBRemote response;
1119
1120 if (uuid_str.empty()) {
1121 auto Result = llvm::sys::fs::md5_contents(
1122 matched_module_spec.GetFileSpec().GetPath());
1123 if (!Result)
1124 return SendErrorResponse(5);
1125 response.PutCString("md5:");
1126 response.PutStringAsRawHex8(Result->digest());
1127 } else {
1128 response.PutCString("uuid:");
1129 response.PutStringAsRawHex8(uuid_str);
1130 }
1131 response.PutChar(';');
1132
1133 const auto &module_arch = matched_module_spec.GetArchitecture();
1134 response.PutCString("triple:");
1135 response.PutStringAsRawHex8(module_arch.GetTriple().getTriple());
1136 response.PutChar(';');
1137
1138 response.PutCString("file_path:");
1139 response.PutStringAsRawHex8(
1140 matched_module_spec.GetFileSpec().GetPath().c_str());
1141 response.PutChar(';');
1142 response.PutCString("file_offset:");
1143 response.PutHex64(file_offset);
1144 response.PutChar(';');
1145 response.PutCString("file_size:");
1146 response.PutHex64(file_size);
1147 response.PutChar(';');
1148
1149 return SendPacketNoLock(response.GetString());
1150}
1151
1152GDBRemoteCommunication::PacketResult
1153GDBRemoteCommunicationServerCommon::Handle_jModulesInfo(
1154 StringExtractorGDBRemote &packet) {
1155 namespace json = llvm::json;
1156
1157 packet.SetFilePos(::strlen("jModulesInfo:"));
1158
1159 StructuredData::ObjectSP object_sp = StructuredData::ParseJSON(packet.Peek());
1160 if (!object_sp)
1161 return SendErrorResponse(1);
1162
1163 StructuredData::Array *packet_array = object_sp->GetAsArray();
1164 if (!packet_array)
1165 return SendErrorResponse(2);
1166
1167 json::Array response_array;
1168 for (size_t i = 0; i < packet_array->GetSize(); ++i) {
1169 StructuredData::Dictionary *query =
1170 packet_array->GetItemAtIndex(i)->GetAsDictionary();
1171 if (!query)
1172 continue;
1173 llvm::StringRef file, triple;
1174 if (!query->GetValueForKeyAsString("file", file) ||
1175 !query->GetValueForKeyAsString("triple", triple))
1176 continue;
1177
1178 ModuleSpec matched_module_spec = GetModuleInfo(file, triple);
1179 if (!matched_module_spec.GetFileSpec())
1180 continue;
1181
1182 const auto file_offset = matched_module_spec.GetObjectOffset();
1183 const auto file_size = matched_module_spec.GetObjectSize();
1184 const auto uuid_str = matched_module_spec.GetUUID().GetAsString("");
1185 if (uuid_str.empty())
1186 continue;
1187 const auto triple_str =
1188 matched_module_spec.GetArchitecture().GetTriple().getTriple();
1189 const auto file_path = matched_module_spec.GetFileSpec().GetPath();
1190
1191 json::Object response{{"uuid", uuid_str},
1192 {"triple", triple_str},
1193 {"file_path", file_path},
1194 {"file_offset", static_cast<int64_t>(file_offset)},
1195 {"file_size", static_cast<int64_t>(file_size)}};
1196 response_array.push_back(std::move(response));
1197 }
1198
1199 StreamString response;
1200 response.AsRawOstream() << std::move(response_array);
1201 StreamGDBRemote escaped_response;
1202 escaped_response.PutEscapedBytes(response.GetString().data(),
1203 response.GetSize());
1204 return SendPacketNoLock(escaped_response.GetString());
1205}
1206
1207void GDBRemoteCommunicationServerCommon::CreateProcessInfoResponse(
1208 const ProcessInstanceInfo &proc_info, StreamString &response) {
1209 response.Printf(
1210 "pid:%" PRIu64"l" "u" ";ppid:%" PRIu64"l" "u" ";uid:%i;gid:%i;euid:%i;egid:%i;",
1211 proc_info.GetProcessID(), proc_info.GetParentProcessID(),
1212 proc_info.GetUserID(), proc_info.GetGroupID(),
1213 proc_info.GetEffectiveUserID(), proc_info.GetEffectiveGroupID());
1214 response.PutCString("name:");
1215 response.PutStringAsRawHex8(proc_info.GetExecutableFile().GetPath().c_str());
1216
1217 response.PutChar(';');
1218 response.PutCString("args:");
1219 response.PutStringAsRawHex8(proc_info.GetArg0());
1220 for (auto &arg : proc_info.GetArguments()) {
1221 response.PutChar('-');
1222 response.PutStringAsRawHex8(arg.ref());
1223 }
1224
1225 response.PutChar(';');
1226 const ArchSpec &proc_arch = proc_info.GetArchitecture();
1227 if (proc_arch.IsValid()) {
1228 const llvm::Triple &proc_triple = proc_arch.GetTriple();
1229 response.PutCString("triple:");
1230 response.PutStringAsRawHex8(proc_triple.getTriple());
1231 response.PutChar(';');
1232 }
1233}
1234
1235void GDBRemoteCommunicationServerCommon::
1236 CreateProcessInfoResponse_DebugServerStyle(
1237 const ProcessInstanceInfo &proc_info, StreamString &response) {
1238 response.Printf("pid:%" PRIx64"l" "x" ";parent-pid:%" PRIx64"l" "x"
1239 ";real-uid:%x;real-gid:%x;effective-uid:%x;effective-gid:%x;",
1240 proc_info.GetProcessID(), proc_info.GetParentProcessID(),
1241 proc_info.GetUserID(), proc_info.GetGroupID(),
1242 proc_info.GetEffectiveUserID(),
1243 proc_info.GetEffectiveGroupID());
1244
1245 const ArchSpec &proc_arch = proc_info.GetArchitecture();
1246 if (proc_arch.IsValid()) {
1247 const llvm::Triple &proc_triple = proc_arch.GetTriple();
1248#if defined(__APPLE__)
1249 // We'll send cputype/cpusubtype.
1250 const uint32_t cpu_type = proc_arch.GetMachOCPUType();
1251 if (cpu_type != 0)
1252 response.Printf("cputype:%" PRIx32"x" ";", cpu_type);
1253
1254 const uint32_t cpu_subtype = proc_arch.GetMachOCPUSubType();
1255 if (cpu_subtype != 0)
1256 response.Printf("cpusubtype:%" PRIx32"x" ";", cpu_subtype);
1257
1258 const std::string vendor = proc_triple.getVendorName().str();
1259 if (!vendor.empty())
1260 response.Printf("vendor:%s;", vendor.c_str());
1261#else
1262 // We'll send the triple.
1263 response.PutCString("triple:");
1264 response.PutStringAsRawHex8(proc_triple.getTriple());
1265 response.PutChar(';');
1266#endif
1267 std::string ostype = std::string(proc_triple.getOSName());
1268 // Adjust so ostype reports ios for Apple/ARM and Apple/ARM64.
1269 if (proc_triple.getVendor() == llvm::Triple::Apple) {
1270 switch (proc_triple.getArch()) {
1271 case llvm::Triple::arm:
1272 case llvm::Triple::thumb:
1273 case llvm::Triple::aarch64:
1274 case llvm::Triple::aarch64_32:
1275 ostype = "ios";
1276 break;
1277 default:
1278 // No change.
1279 break;
1280 }
1281 }
1282 response.Printf("ostype:%s;", ostype.c_str());
1283
1284 switch (proc_arch.GetByteOrder()) {
1285 case lldb::eByteOrderLittle:
1286 response.PutCString("endian:little;");
1287 break;
1288 case lldb::eByteOrderBig:
1289 response.PutCString("endian:big;");
1290 break;
1291 case lldb::eByteOrderPDP:
1292 response.PutCString("endian:pdp;");
1293 break;
1294 default:
1295 // Nothing.
1296 break;
1297 }
1298 // In case of MIPS64, pointer size is depend on ELF ABI For N32 the pointer
1299 // size is 4 and for N64 it is 8
1300 std::string abi = proc_arch.GetTargetABI();
1301 if (!abi.empty())
1302 response.Printf("elf_abi:%s;", abi.c_str());
1303 response.Printf("ptrsize:%d;", proc_arch.GetAddressByteSize());
1304 }
1305}
1306
1307FileSpec GDBRemoteCommunicationServerCommon::FindModuleFile(
1308 const std::string &module_path, const ArchSpec &arch) {
1309#ifdef __ANDROID__
1310 return HostInfoAndroid::ResolveLibraryPath(module_path, arch);
1311#else
1312 FileSpec file_spec(module_path);
1313 FileSystem::Instance().Resolve(file_spec);
1314 return file_spec;
1315#endif
1316}
1317
1318ModuleSpec
1319GDBRemoteCommunicationServerCommon::GetModuleInfo(llvm::StringRef module_path,
1320 llvm::StringRef triple) {
1321 ArchSpec arch(triple);
1322
1323 FileSpec req_module_path_spec(module_path);
1324 FileSystem::Instance().Resolve(req_module_path_spec);
1325
1326 const FileSpec module_path_spec =
1327 FindModuleFile(req_module_path_spec.GetPath(), arch);
1328 const ModuleSpec module_spec(module_path_spec, arch);
1329
1330 ModuleSpecList module_specs;
1331 if (!ObjectFile::GetModuleSpecifications(module_path_spec, 0, 0,
1332 module_specs))
1333 return ModuleSpec();
1334
1335 ModuleSpec matched_module_spec;
1336 if (!module_specs.FindMatchingModuleSpec(module_spec, matched_module_spec))
1337 return ModuleSpec();
1338
1339 return matched_module_spec;
1340}
1341
1342std::vector<std::string> GDBRemoteCommunicationServerCommon::HandleFeatures(
1343 const llvm::ArrayRef<llvm::StringRef> client_features) {
1344 // 128KBytes is a reasonable max packet size--debugger can always use less.
1345 constexpr uint32_t max_packet_size = 128 * 1024;
1346
1347 // Features common to platform server and llgs.
1348 return {
1349 llvm::formatv("PacketSize={0}", max_packet_size),
1350 "QStartNoAckMode+",
1351 "qEcho+",
1352 "native-signals+",
1353 };
1354}