File: | build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp |
Warning: | line 179, column 27 Potential leak of memory pointed to by 'reg_interface' |
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1 | //===-- ThreadElfCore.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 "lldb/Target/RegisterContext.h" | |||
10 | #include "lldb/Target/StopInfo.h" | |||
11 | #include "lldb/Target/Target.h" | |||
12 | #include "lldb/Target/Unwind.h" | |||
13 | #include "lldb/Utility/DataExtractor.h" | |||
14 | #include "lldb/Utility/LLDBLog.h" | |||
15 | #include "lldb/Utility/Log.h" | |||
16 | ||||
17 | #include "Plugins/Process/Utility/RegisterContextFreeBSD_i386.h" | |||
18 | #include "Plugins/Process/Utility/RegisterContextFreeBSD_mips64.h" | |||
19 | #include "Plugins/Process/Utility/RegisterContextFreeBSD_powerpc.h" | |||
20 | #include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h" | |||
21 | #include "Plugins/Process/Utility/RegisterContextLinux_i386.h" | |||
22 | #include "Plugins/Process/Utility/RegisterContextLinux_s390x.h" | |||
23 | #include "Plugins/Process/Utility/RegisterContextLinux_x86_64.h" | |||
24 | #include "Plugins/Process/Utility/RegisterContextNetBSD_i386.h" | |||
25 | #include "Plugins/Process/Utility/RegisterContextNetBSD_x86_64.h" | |||
26 | #include "Plugins/Process/Utility/RegisterContextOpenBSD_i386.h" | |||
27 | #include "Plugins/Process/Utility/RegisterContextOpenBSD_x86_64.h" | |||
28 | #include "Plugins/Process/Utility/RegisterInfoPOSIX_arm.h" | |||
29 | #include "Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h" | |||
30 | #include "Plugins/Process/Utility/RegisterInfoPOSIX_ppc64le.h" | |||
31 | #include "ProcessElfCore.h" | |||
32 | #include "RegisterContextPOSIXCore_arm.h" | |||
33 | #include "RegisterContextPOSIXCore_arm64.h" | |||
34 | #include "RegisterContextPOSIXCore_mips64.h" | |||
35 | #include "RegisterContextPOSIXCore_powerpc.h" | |||
36 | #include "RegisterContextPOSIXCore_ppc64le.h" | |||
37 | #include "RegisterContextPOSIXCore_s390x.h" | |||
38 | #include "RegisterContextPOSIXCore_x86_64.h" | |||
39 | #include "ThreadElfCore.h" | |||
40 | ||||
41 | #include <memory> | |||
42 | ||||
43 | using namespace lldb; | |||
44 | using namespace lldb_private; | |||
45 | ||||
46 | // Construct a Thread object with given data | |||
47 | ThreadElfCore::ThreadElfCore(Process &process, const ThreadData &td) | |||
48 | : Thread(process, td.tid), m_thread_name(td.name), m_thread_reg_ctx_sp(), | |||
49 | m_signo(td.signo), m_gpregset_data(td.gpregset), m_notes(td.notes) {} | |||
50 | ||||
51 | ThreadElfCore::~ThreadElfCore() { DestroyThread(); } | |||
52 | ||||
53 | void ThreadElfCore::RefreshStateAfterStop() { | |||
54 | GetRegisterContext()->InvalidateIfNeeded(false); | |||
| ||||
55 | } | |||
56 | ||||
57 | RegisterContextSP ThreadElfCore::GetRegisterContext() { | |||
58 | if (!m_reg_context_sp) { | |||
59 | m_reg_context_sp = CreateRegisterContextForFrame(nullptr); | |||
60 | } | |||
61 | return m_reg_context_sp; | |||
62 | } | |||
63 | ||||
64 | RegisterContextSP | |||
65 | ThreadElfCore::CreateRegisterContextForFrame(StackFrame *frame) { | |||
66 | RegisterContextSP reg_ctx_sp; | |||
67 | uint32_t concrete_frame_idx = 0; | |||
68 | Log *log = GetLog(LLDBLog::Thread); | |||
69 | ||||
70 | if (frame
| |||
71 | concrete_frame_idx = frame->GetConcreteFrameIndex(); | |||
72 | ||||
73 | if (concrete_frame_idx
| |||
74 | if (m_thread_reg_ctx_sp) | |||
75 | return m_thread_reg_ctx_sp; | |||
76 | ||||
77 | ProcessElfCore *process = static_cast<ProcessElfCore *>(GetProcess().get()); | |||
78 | ArchSpec arch = process->GetArchitecture(); | |||
79 | RegisterInfoInterface *reg_interface = nullptr; | |||
80 | ||||
81 | switch (arch.GetTriple().getOS()) { | |||
82 | case llvm::Triple::FreeBSD: { | |||
83 | switch (arch.GetMachine()) { | |||
84 | case llvm::Triple::aarch64: | |||
85 | case llvm::Triple::arm: | |||
86 | break; | |||
87 | case llvm::Triple::ppc: | |||
88 | reg_interface = new RegisterContextFreeBSD_powerpc32(arch); | |||
89 | break; | |||
90 | case llvm::Triple::ppc64: | |||
91 | reg_interface = new RegisterContextFreeBSD_powerpc64(arch); | |||
92 | break; | |||
93 | case llvm::Triple::mips64: | |||
94 | reg_interface = new RegisterContextFreeBSD_mips64(arch); | |||
95 | break; | |||
96 | case llvm::Triple::x86: | |||
97 | reg_interface = new RegisterContextFreeBSD_i386(arch); | |||
98 | break; | |||
99 | case llvm::Triple::x86_64: | |||
100 | reg_interface = new RegisterContextFreeBSD_x86_64(arch); | |||
101 | break; | |||
102 | default: | |||
103 | break; | |||
104 | } | |||
105 | break; | |||
106 | } | |||
107 | ||||
108 | case llvm::Triple::NetBSD: { | |||
109 | switch (arch.GetMachine()) { | |||
110 | case llvm::Triple::aarch64: | |||
111 | break; | |||
112 | case llvm::Triple::x86: | |||
113 | reg_interface = new RegisterContextNetBSD_i386(arch); | |||
114 | break; | |||
115 | case llvm::Triple::x86_64: | |||
116 | reg_interface = new RegisterContextNetBSD_x86_64(arch); | |||
117 | break; | |||
118 | default: | |||
119 | break; | |||
120 | } | |||
121 | break; | |||
122 | } | |||
123 | ||||
124 | case llvm::Triple::Linux: { | |||
125 | switch (arch.GetMachine()) { | |||
126 | case llvm::Triple::aarch64: | |||
127 | break; | |||
128 | case llvm::Triple::ppc64le: | |||
129 | reg_interface = new RegisterInfoPOSIX_ppc64le(arch); | |||
130 | break; | |||
131 | case llvm::Triple::systemz: | |||
132 | reg_interface = new RegisterContextLinux_s390x(arch); | |||
133 | break; | |||
134 | case llvm::Triple::x86: | |||
135 | reg_interface = new RegisterContextLinux_i386(arch); | |||
136 | break; | |||
137 | case llvm::Triple::x86_64: | |||
138 | reg_interface = new RegisterContextLinux_x86_64(arch); | |||
139 | break; | |||
140 | default: | |||
141 | break; | |||
142 | } | |||
143 | break; | |||
144 | } | |||
145 | ||||
146 | case llvm::Triple::OpenBSD: { | |||
147 | switch (arch.GetMachine()) { | |||
148 | case llvm::Triple::aarch64: | |||
149 | break; | |||
150 | case llvm::Triple::x86: | |||
151 | reg_interface = new RegisterContextOpenBSD_i386(arch); | |||
152 | break; | |||
153 | case llvm::Triple::x86_64: | |||
154 | reg_interface = new RegisterContextOpenBSD_x86_64(arch); | |||
155 | break; | |||
156 | default: | |||
157 | break; | |||
158 | } | |||
159 | break; | |||
160 | } | |||
161 | ||||
162 | default: | |||
163 | break; | |||
164 | } | |||
165 | ||||
166 | if (!reg_interface
| |||
167 | arch.GetMachine() != llvm::Triple::arm) { | |||
168 | LLDB_LOGF(log, "elf-core::%s:: Architecture(%d) or OS(%d) not supported",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("elf-core::%s:: Architecture(%d) or OS(%d) not supported" , __FUNCTION__, arch.GetMachine(), arch.GetTriple().getOS()); } while (0) | |||
169 | __FUNCTION__, arch.GetMachine(), arch.GetTriple().getOS())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("elf-core::%s:: Architecture(%d) or OS(%d) not supported" , __FUNCTION__, arch.GetMachine(), arch.GetTriple().getOS()); } while (0); | |||
170 | assert(false && "Architecture or OS not supported")(static_cast <bool> (false && "Architecture or OS not supported" ) ? void (0) : __assert_fail ("false && \"Architecture or OS not supported\"" , "lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp", 170 , __extension__ __PRETTY_FUNCTION__)); | |||
171 | } | |||
172 | ||||
173 | switch (arch.GetMachine()) { | |||
174 | case llvm::Triple::aarch64: | |||
175 | m_thread_reg_ctx_sp = RegisterContextCorePOSIX_arm64::Create( | |||
176 | *this, arch, m_gpregset_data, m_notes); | |||
177 | break; | |||
178 | case llvm::Triple::arm: | |||
179 | m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_arm>( | |||
| ||||
180 | *this, std::make_unique<RegisterInfoPOSIX_arm>(arch), m_gpregset_data, | |||
181 | m_notes); | |||
182 | break; | |||
183 | case llvm::Triple::mipsel: | |||
184 | case llvm::Triple::mips: | |||
185 | m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_mips64>( | |||
186 | *this, reg_interface, m_gpregset_data, m_notes); | |||
187 | break; | |||
188 | case llvm::Triple::mips64: | |||
189 | case llvm::Triple::mips64el: | |||
190 | m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_mips64>( | |||
191 | *this, reg_interface, m_gpregset_data, m_notes); | |||
192 | break; | |||
193 | case llvm::Triple::ppc: | |||
194 | case llvm::Triple::ppc64: | |||
195 | m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_powerpc>( | |||
196 | *this, reg_interface, m_gpregset_data, m_notes); | |||
197 | break; | |||
198 | case llvm::Triple::ppc64le: | |||
199 | m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_ppc64le>( | |||
200 | *this, reg_interface, m_gpregset_data, m_notes); | |||
201 | break; | |||
202 | case llvm::Triple::systemz: | |||
203 | m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_s390x>( | |||
204 | *this, reg_interface, m_gpregset_data, m_notes); | |||
205 | break; | |||
206 | case llvm::Triple::x86: | |||
207 | case llvm::Triple::x86_64: | |||
208 | m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_x86_64>( | |||
209 | *this, reg_interface, m_gpregset_data, m_notes); | |||
210 | break; | |||
211 | default: | |||
212 | break; | |||
213 | } | |||
214 | ||||
215 | reg_ctx_sp = m_thread_reg_ctx_sp; | |||
216 | } else { | |||
217 | reg_ctx_sp = GetUnwinder().CreateRegisterContextForFrame(frame); | |||
218 | } | |||
219 | return reg_ctx_sp; | |||
220 | } | |||
221 | ||||
222 | bool ThreadElfCore::CalculateStopInfo() { | |||
223 | ProcessSP process_sp(GetProcess()); | |||
224 | if (process_sp) { | |||
225 | SetStopInfo(StopInfo::CreateStopReasonWithSignal(*this, m_signo)); | |||
226 | return true; | |||
227 | } | |||
228 | return false; | |||
229 | } | |||
230 | ||||
231 | // Parse PRSTATUS from NOTE entry | |||
232 | ELFLinuxPrStatus::ELFLinuxPrStatus() { | |||
233 | memset(this, 0, sizeof(ELFLinuxPrStatus)); | |||
234 | } | |||
235 | ||||
236 | size_t ELFLinuxPrStatus::GetSize(const lldb_private::ArchSpec &arch) { | |||
237 | constexpr size_t mips_linux_pr_status_size_o32 = 96; | |||
238 | constexpr size_t mips_linux_pr_status_size_n32 = 72; | |||
239 | constexpr size_t num_ptr_size_members = 10; | |||
240 | if (arch.IsMIPS()) { | |||
241 | std::string abi = arch.GetTargetABI(); | |||
242 | assert(!abi.empty() && "ABI is not set")(static_cast <bool> (!abi.empty() && "ABI is not set" ) ? void (0) : __assert_fail ("!abi.empty() && \"ABI is not set\"" , "lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp", 242 , __extension__ __PRETTY_FUNCTION__)); | |||
243 | if (!abi.compare("n64")) | |||
244 | return sizeof(ELFLinuxPrStatus); | |||
245 | else if (!abi.compare("o32")) | |||
246 | return mips_linux_pr_status_size_o32; | |||
247 | // N32 ABI | |||
248 | return mips_linux_pr_status_size_n32; | |||
249 | } | |||
250 | switch (arch.GetCore()) { | |||
251 | case lldb_private::ArchSpec::eCore_x86_32_i386: | |||
252 | case lldb_private::ArchSpec::eCore_x86_32_i486: | |||
253 | return 72; | |||
254 | default: | |||
255 | if (arch.GetAddressByteSize() == 8) | |||
256 | return sizeof(ELFLinuxPrStatus); | |||
257 | else | |||
258 | return sizeof(ELFLinuxPrStatus) - num_ptr_size_members * 4; | |||
259 | } | |||
260 | } | |||
261 | ||||
262 | Status ELFLinuxPrStatus::Parse(const DataExtractor &data, | |||
263 | const ArchSpec &arch) { | |||
264 | Status error; | |||
265 | if (GetSize(arch) > data.GetByteSize()) { | |||
266 | error.SetErrorStringWithFormat( | |||
267 | "NT_PRSTATUS size should be %zu, but the remaining bytes are: %" PRIu64"l" "u", | |||
268 | GetSize(arch), data.GetByteSize()); | |||
269 | return error; | |||
270 | } | |||
271 | ||||
272 | // Read field by field to correctly account for endianess of both the core | |||
273 | // dump and the platform running lldb. | |||
274 | offset_t offset = 0; | |||
275 | si_signo = data.GetU32(&offset); | |||
276 | si_code = data.GetU32(&offset); | |||
277 | si_errno = data.GetU32(&offset); | |||
278 | ||||
279 | pr_cursig = data.GetU16(&offset); | |||
280 | offset += 2; // pad | |||
281 | ||||
282 | pr_sigpend = data.GetAddress(&offset); | |||
283 | pr_sighold = data.GetAddress(&offset); | |||
284 | ||||
285 | pr_pid = data.GetU32(&offset); | |||
286 | pr_ppid = data.GetU32(&offset); | |||
287 | pr_pgrp = data.GetU32(&offset); | |||
288 | pr_sid = data.GetU32(&offset); | |||
289 | ||||
290 | pr_utime.tv_sec = data.GetAddress(&offset); | |||
291 | pr_utime.tv_usec = data.GetAddress(&offset); | |||
292 | ||||
293 | pr_stime.tv_sec = data.GetAddress(&offset); | |||
294 | pr_stime.tv_usec = data.GetAddress(&offset); | |||
295 | ||||
296 | pr_cutime.tv_sec = data.GetAddress(&offset); | |||
297 | pr_cutime.tv_usec = data.GetAddress(&offset); | |||
298 | ||||
299 | pr_cstime.tv_sec = data.GetAddress(&offset); | |||
300 | pr_cstime.tv_usec = data.GetAddress(&offset); | |||
301 | ||||
302 | return error; | |||
303 | } | |||
304 | ||||
305 | // Parse PRPSINFO from NOTE entry | |||
306 | ELFLinuxPrPsInfo::ELFLinuxPrPsInfo() { | |||
307 | memset(this, 0, sizeof(ELFLinuxPrPsInfo)); | |||
308 | } | |||
309 | ||||
310 | size_t ELFLinuxPrPsInfo::GetSize(const lldb_private::ArchSpec &arch) { | |||
311 | constexpr size_t mips_linux_pr_psinfo_size_o32_n32 = 128; | |||
312 | if (arch.IsMIPS()) { | |||
313 | uint8_t address_byte_size = arch.GetAddressByteSize(); | |||
314 | if (address_byte_size == 8) | |||
315 | return sizeof(ELFLinuxPrPsInfo); | |||
316 | return mips_linux_pr_psinfo_size_o32_n32; | |||
317 | } | |||
318 | ||||
319 | switch (arch.GetCore()) { | |||
320 | case lldb_private::ArchSpec::eCore_s390x_generic: | |||
321 | case lldb_private::ArchSpec::eCore_x86_64_x86_64: | |||
322 | return sizeof(ELFLinuxPrPsInfo); | |||
323 | case lldb_private::ArchSpec::eCore_x86_32_i386: | |||
324 | case lldb_private::ArchSpec::eCore_x86_32_i486: | |||
325 | return 124; | |||
326 | default: | |||
327 | return 0; | |||
328 | } | |||
329 | } | |||
330 | ||||
331 | Status ELFLinuxPrPsInfo::Parse(const DataExtractor &data, | |||
332 | const ArchSpec &arch) { | |||
333 | Status error; | |||
334 | ByteOrder byteorder = data.GetByteOrder(); | |||
335 | if (GetSize(arch) > data.GetByteSize()) { | |||
336 | error.SetErrorStringWithFormat( | |||
337 | "NT_PRPSINFO size should be %zu, but the remaining bytes are: %" PRIu64"l" "u", | |||
338 | GetSize(arch), data.GetByteSize()); | |||
339 | return error; | |||
340 | } | |||
341 | size_t size = 0; | |||
342 | offset_t offset = 0; | |||
343 | ||||
344 | pr_state = data.GetU8(&offset); | |||
345 | pr_sname = data.GetU8(&offset); | |||
346 | pr_zomb = data.GetU8(&offset); | |||
347 | pr_nice = data.GetU8(&offset); | |||
348 | if (data.GetAddressByteSize() == 8) { | |||
349 | // Word align the next field on 64 bit. | |||
350 | offset += 4; | |||
351 | } | |||
352 | ||||
353 | pr_flag = data.GetAddress(&offset); | |||
354 | ||||
355 | if (arch.IsMIPS()) { | |||
356 | // The pr_uid and pr_gid is always 32 bit irrespective of platforms | |||
357 | pr_uid = data.GetU32(&offset); | |||
358 | pr_gid = data.GetU32(&offset); | |||
359 | } else { | |||
360 | // 16 bit on 32 bit platforms, 32 bit on 64 bit platforms | |||
361 | pr_uid = data.GetMaxU64(&offset, data.GetAddressByteSize() >> 1); | |||
362 | pr_gid = data.GetMaxU64(&offset, data.GetAddressByteSize() >> 1); | |||
363 | } | |||
364 | ||||
365 | pr_pid = data.GetU32(&offset); | |||
366 | pr_ppid = data.GetU32(&offset); | |||
367 | pr_pgrp = data.GetU32(&offset); | |||
368 | pr_sid = data.GetU32(&offset); | |||
369 | ||||
370 | size = 16; | |||
371 | data.ExtractBytes(offset, size, byteorder, pr_fname); | |||
372 | offset += size; | |||
373 | ||||
374 | size = 80; | |||
375 | data.ExtractBytes(offset, size, byteorder, pr_psargs); | |||
376 | offset += size; | |||
377 | ||||
378 | return error; | |||
379 | } | |||
380 | ||||
381 | // Parse SIGINFO from NOTE entry | |||
382 | ELFLinuxSigInfo::ELFLinuxSigInfo() { memset(this, 0, sizeof(ELFLinuxSigInfo)); } | |||
383 | ||||
384 | size_t ELFLinuxSigInfo::GetSize(const lldb_private::ArchSpec &arch) { | |||
385 | if (arch.IsMIPS()) | |||
386 | return sizeof(ELFLinuxSigInfo); | |||
387 | switch (arch.GetCore()) { | |||
388 | case lldb_private::ArchSpec::eCore_x86_64_x86_64: | |||
389 | return sizeof(ELFLinuxSigInfo); | |||
390 | case lldb_private::ArchSpec::eCore_s390x_generic: | |||
391 | case lldb_private::ArchSpec::eCore_x86_32_i386: | |||
392 | case lldb_private::ArchSpec::eCore_x86_32_i486: | |||
393 | return 12; | |||
394 | default: | |||
395 | return 0; | |||
396 | } | |||
397 | } | |||
398 | ||||
399 | Status ELFLinuxSigInfo::Parse(const DataExtractor &data, const ArchSpec &arch) { | |||
400 | Status error; | |||
401 | if (GetSize(arch) > data.GetByteSize()) { | |||
402 | error.SetErrorStringWithFormat( | |||
403 | "NT_SIGINFO size should be %zu, but the remaining bytes are: %" PRIu64"l" "u", | |||
404 | GetSize(arch), data.GetByteSize()); | |||
405 | return error; | |||
406 | } | |||
407 | ||||
408 | // Parsing from a 32 bit ELF core file, and populating/reusing the structure | |||
409 | // properly, because the struct is for the 64 bit version | |||
410 | offset_t offset = 0; | |||
411 | si_signo = data.GetU32(&offset); | |||
412 | si_code = data.GetU32(&offset); | |||
413 | si_errno = data.GetU32(&offset); | |||
414 | ||||
415 | return error; | |||
416 | } |