Bug Summary

File:tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
Warning:line 2285, column 18
Dereference of null pointer

Annotated Source Code

1//===-- NativeProcessLinux.cpp -------------------------------- -*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "NativeProcessLinux.h"
11
12// C Includes
13#include <errno(*__errno_location ()).h>
14#include <stdint.h>
15#include <string.h>
16#include <unistd.h>
17
18// C++ Includes
19#include <fstream>
20#include <mutex>
21#include <sstream>
22#include <string>
23#include <unordered_map>
24
25// Other libraries and framework includes
26#include "lldb/Core/EmulateInstruction.h"
27#include "lldb/Core/ModuleSpec.h"
28#include "lldb/Core/RegisterValue.h"
29#include "lldb/Core/State.h"
30#include "lldb/Host/Host.h"
31#include "lldb/Host/HostProcess.h"
32#include "lldb/Host/PseudoTerminal.h"
33#include "lldb/Host/ThreadLauncher.h"
34#include "lldb/Host/common/NativeBreakpoint.h"
35#include "lldb/Host/common/NativeRegisterContext.h"
36#include "lldb/Host/linux/Ptrace.h"
37#include "lldb/Host/linux/Uio.h"
38#include "lldb/Host/posix/ProcessLauncherPosixFork.h"
39#include "lldb/Symbol/ObjectFile.h"
40#include "lldb/Target/Process.h"
41#include "lldb/Target/ProcessLaunchInfo.h"
42#include "lldb/Target/Target.h"
43#include "lldb/Utility/LLDBAssert.h"
44#include "lldb/Utility/Status.h"
45#include "lldb/Utility/StringExtractor.h"
46#include "llvm/Support/Errno.h"
47#include "llvm/Support/FileSystem.h"
48#include "llvm/Support/Threading.h"
49
50#include "NativeThreadLinux.h"
51#include "Plugins/Process/POSIX/ProcessPOSIXLog.h"
52#include "Procfs.h"
53
54#include <linux/unistd.h>
55#include <sys/socket.h>
56#include <sys/syscall.h>
57#include <sys/types.h>
58#include <sys/user.h>
59#include <sys/wait.h>
60
61// Support hardware breakpoints in case it has not been defined
62#ifndef TRAP_HWBKPT4
63#define TRAP_HWBKPT4 4
64#endif
65
66using namespace lldb;
67using namespace lldb_private;
68using namespace lldb_private::process_linux;
69using namespace llvm;
70
71// Private bits we only need internally.
72
73static bool ProcessVmReadvSupported() {
74 static bool is_supported;
75 static llvm::once_flag flag;
76
77 llvm::call_once(flag, [] {
78 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
79
80 uint32_t source = 0x47424742;
81 uint32_t dest = 0;
82
83 struct iovec local, remote;
84 remote.iov_base = &source;
85 local.iov_base = &dest;
86 remote.iov_len = local.iov_len = sizeof source;
87
88 // We shall try if cross-process-memory reads work by attempting to read a
89 // value from our own process.
90 ssize_t res = process_vm_readv(getpid(), &local, 1, &remote, 1, 0);
91 is_supported = (res == sizeof(source) && source == dest);
92 if (is_supported)
93 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Detected kernel support for process_vm_readv syscall. "
"Fast memory reads enabled."); } while (0)
94 "Detected kernel support for process_vm_readv syscall. "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Detected kernel support for process_vm_readv syscall. "
"Fast memory reads enabled."); } while (0)
95 "Fast memory reads enabled.")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Detected kernel support for process_vm_readv syscall. "
"Fast memory reads enabled."); } while (0)
;
96 else
97 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "syscall process_vm_readv failed (error: {0}). Fast memory "
"reads disabled.", llvm::sys::StrError()); } while (0)
98 "syscall process_vm_readv failed (error: {0}). Fast memory "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "syscall process_vm_readv failed (error: {0}). Fast memory "
"reads disabled.", llvm::sys::StrError()); } while (0)
99 "reads disabled.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "syscall process_vm_readv failed (error: {0}). Fast memory "
"reads disabled.", llvm::sys::StrError()); } while (0)
100 llvm::sys::StrError())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "syscall process_vm_readv failed (error: {0}). Fast memory "
"reads disabled.", llvm::sys::StrError()); } while (0)
;
101 });
102
103 return is_supported;
104}
105
106namespace {
107void MaybeLogLaunchInfo(const ProcessLaunchInfo &info) {
108 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
109 if (!log)
110 return;
111
112 if (const FileAction *action = info.GetFileActionForFD(STDIN_FILENO0))
113 LLDB_LOG(log, "setting STDIN to '{0}'", action->GetFileSpec())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "setting STDIN to '{0}'", action->GetFileSpec
()); } while (0)
;
114 else
115 LLDB_LOG(log, "leaving STDIN as is")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "leaving STDIN as is"); } while (0)
;
116
117 if (const FileAction *action = info.GetFileActionForFD(STDOUT_FILENO1))
118 LLDB_LOG(log, "setting STDOUT to '{0}'", action->GetFileSpec())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "setting STDOUT to '{0}'", action->GetFileSpec
()); } while (0)
;
119 else
120 LLDB_LOG(log, "leaving STDOUT as is")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "leaving STDOUT as is"); } while (0)
;
121
122 if (const FileAction *action = info.GetFileActionForFD(STDERR_FILENO2))
123 LLDB_LOG(log, "setting STDERR to '{0}'", action->GetFileSpec())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "setting STDERR to '{0}'", action->GetFileSpec
()); } while (0)
;
124 else
125 LLDB_LOG(log, "leaving STDERR as is")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "leaving STDERR as is"); } while (0)
;
126
127 int i = 0;
128 for (const char **args = info.GetArguments().GetConstArgumentVector(); *args;
129 ++args, ++i)
130 LLDB_LOG(log, "arg {0}: '{1}'", i, *args)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "arg {0}: '{1}'", i, *args); } while (0)
;
131}
132
133void DisplayBytes(StreamString &s, void *bytes, uint32_t count) {
134 uint8_t *ptr = (uint8_t *)bytes;
135 const uint32_t loop_count = std::min<uint32_t>(DEBUG_PTRACE_MAXBYTES20, count);
136 for (uint32_t i = 0; i < loop_count; i++) {
137 s.Printf("[%x]", *ptr);
138 ptr++;
139 }
140}
141
142void PtraceDisplayBytes(int &req, void *data, size_t data_size) {
143 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
144 if (!log)
145 return;
146 StreamString buf;
147
148 switch (req) {
149 case PTRACE_POKETEXT: {
150 DisplayBytes(buf, &data, 8);
151 LLDB_LOGV(log, "PTRACE_POKETEXT {0}", buf.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "PTRACE_POKETEXT {0}", buf.GetData()); } while
(0)
;
152 break;
153 }
154 case PTRACE_POKEDATA: {
155 DisplayBytes(buf, &data, 8);
156 LLDB_LOGV(log, "PTRACE_POKEDATA {0}", buf.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "PTRACE_POKEDATA {0}", buf.GetData()); } while
(0)
;
157 break;
158 }
159 case PTRACE_POKEUSER: {
160 DisplayBytes(buf, &data, 8);
161 LLDB_LOGV(log, "PTRACE_POKEUSER {0}", buf.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "PTRACE_POKEUSER {0}", buf.GetData()); } while
(0)
;
162 break;
163 }
164 case PTRACE_SETREGS13: {
165 DisplayBytes(buf, data, data_size);
166 LLDB_LOGV(log, "PTRACE_SETREGS {0}", buf.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "PTRACE_SETREGS {0}", buf.GetData()); } while
(0)
;
167 break;
168 }
169 case PTRACE_SETFPREGS15: {
170 DisplayBytes(buf, data, data_size);
171 LLDB_LOGV(log, "PTRACE_SETFPREGS {0}", buf.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "PTRACE_SETFPREGS {0}", buf.GetData()); } while
(0)
;
172 break;
173 }
174 case PTRACE_SETSIGINFO: {
175 DisplayBytes(buf, data, sizeof(siginfo_t));
176 LLDB_LOGV(log, "PTRACE_SETSIGINFO {0}", buf.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "PTRACE_SETSIGINFO {0}", buf.GetData()); } while
(0)
;
177 break;
178 }
179 case PTRACE_SETREGSETPTRACE_SETREGSET: {
180 // Extract iov_base from data, which is a pointer to the struct IOVEC
181 DisplayBytes(buf, *(void **)data, data_size);
182 LLDB_LOGV(log, "PTRACE_SETREGSET {0}", buf.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "PTRACE_SETREGSET {0}", buf.GetData()); } while
(0)
;
183 break;
184 }
185 default: {}
186 }
187}
188
189static constexpr unsigned k_ptrace_word_size = sizeof(void *);
190static_assert(sizeof(long) >= k_ptrace_word_size,
191 "Size of long must be larger than ptrace word size");
192} // end of anonymous namespace
193
194// Simple helper function to ensure flags are enabled on the given file
195// descriptor.
196static Status EnsureFDFlags(int fd, int flags) {
197 Status error;
198
199 int status = fcntl(fd, F_GETFL3);
200 if (status == -1) {
201 error.SetErrorToErrno();
202 return error;
203 }
204
205 if (fcntl(fd, F_SETFL4, status | flags) == -1) {
206 error.SetErrorToErrno();
207 return error;
208 }
209
210 return error;
211}
212
213// -----------------------------------------------------------------------------
214// Public Static Methods
215// -----------------------------------------------------------------------------
216
217llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
218NativeProcessLinux::Factory::Launch(ProcessLaunchInfo &launch_info,
219 NativeDelegate &native_delegate,
220 MainLoop &mainloop) const {
221 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
222
223 MaybeLogLaunchInfo(launch_info);
224
225 Status status;
226 ::pid_t pid = ProcessLauncherPosixFork()
227 .LaunchProcess(launch_info, status)
228 .GetProcessId();
229 LLDB_LOG(log, "pid = {0:x}", pid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0:x}", pid); } while (0)
;
230 if (status.Fail()) {
231 LLDB_LOG(log, "failed to launch process: {0}", status)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to launch process: {0}", status); } while
(0)
;
232 return status.ToError();
233 }
234
235 // Wait for the child process to trap on its call to execve.
236 int wstatus;
237 ::pid_t wpid = llvm::sys::RetryAfterSignal(-1, ::waitpid, pid, &wstatus, 0);
238 assert(wpid == pid)((wpid == pid) ? static_cast<void> (0) : __assert_fail (
"wpid == pid", "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 238, __PRETTY_FUNCTION__))
;
239 (void)wpid;
240 if (!WIFSTOPPED(wstatus)(((wstatus) & 0xff) == 0x7f)) {
241 LLDB_LOG(log, "Could not sync with inferior process: wstatus={1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Could not sync with inferior process: wstatus={1}"
, WaitStatus::Decode(wstatus)); } while (0)
242 WaitStatus::Decode(wstatus))do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Could not sync with inferior process: wstatus={1}"
, WaitStatus::Decode(wstatus)); } while (0)
;
243 return llvm::make_error<StringError>("Could not sync with inferior process",
244 llvm::inconvertibleErrorCode());
245 }
246 LLDB_LOG(log, "inferior started, now in stopped state")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "inferior started, now in stopped state"); } while
(0)
;
247
248 ArchSpec arch;
249 if ((status = ResolveProcessArchitecture(pid, arch)).Fail())
250 return status.ToError();
251
252 // Set the architecture to the exe architecture.
253 LLDB_LOG(log, "pid = {0:x}, detected architecture {1}", pid,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0:x}, detected architecture {1}", pid
, arch.GetArchitectureName()); } while (0)
254 arch.GetArchitectureName())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0:x}, detected architecture {1}", pid
, arch.GetArchitectureName()); } while (0)
;
255
256 status = SetDefaultPtraceOpts(pid);
257 if (status.Fail()) {
258 LLDB_LOG(log, "failed to set default ptrace options: {0}", status)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to set default ptrace options: {0}", status
); } while (0)
;
259 return status.ToError();
260 }
261
262 return std::unique_ptr<NativeProcessLinux>(new NativeProcessLinux(
263 pid, launch_info.GetPTY().ReleaseMasterFileDescriptor(), native_delegate,
264 arch, mainloop, {pid}));
265}
266
267llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
268NativeProcessLinux::Factory::Attach(
269 lldb::pid_t pid, NativeProcessProtocol::NativeDelegate &native_delegate,
270 MainLoop &mainloop) const {
271 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
272 LLDB_LOG(log, "pid = {0:x}", pid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0:x}", pid); } while (0)
;
273
274 // Retrieve the architecture for the running process.
275 ArchSpec arch;
276 Status status = ResolveProcessArchitecture(pid, arch);
277 if (!status.Success())
278 return status.ToError();
279
280 auto tids_or = NativeProcessLinux::Attach(pid);
281 if (!tids_or)
282 return tids_or.takeError();
283
284 return std::unique_ptr<NativeProcessLinux>(new NativeProcessLinux(
285 pid, -1, native_delegate, arch, mainloop, *tids_or));
286}
287
288// -----------------------------------------------------------------------------
289// Public Instance Methods
290// -----------------------------------------------------------------------------
291
292NativeProcessLinux::NativeProcessLinux(::pid_t pid, int terminal_fd,
293 NativeDelegate &delegate,
294 const ArchSpec &arch, MainLoop &mainloop,
295 llvm::ArrayRef<::pid_t> tids)
296 : NativeProcessProtocol(pid, terminal_fd, delegate), m_arch(arch) {
297 if (m_terminal_fd != -1) {
298 Status status = EnsureFDFlags(m_terminal_fd, O_NONBLOCK04000);
299 assert(status.Success())((status.Success()) ? static_cast<void> (0) : __assert_fail
("status.Success()", "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 299, __PRETTY_FUNCTION__))
;
300 }
301
302 Status status;
303 m_sigchld_handle = mainloop.RegisterSignal(
304 SIGCHLD17, [this](MainLoopBase &) { SigchldHandler(); }, status);
1
Calling 'NativeProcessLinux::SigchldHandler'
305 assert(m_sigchld_handle && status.Success())((m_sigchld_handle && status.Success()) ? static_cast
<void> (0) : __assert_fail ("m_sigchld_handle && status.Success()"
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 305, __PRETTY_FUNCTION__))
;
306
307 for (const auto &tid : tids) {
308 NativeThreadLinux &thread = AddThread(tid);
309 thread.SetStoppedBySignal(SIGSTOP19);
310 ThreadWasCreated(thread);
311 }
312
313 // Let our process instance know the thread has stopped.
314 SetCurrentThreadID(tids[0]);
315 SetState(StateType::eStateStopped, false);
316
317 // Proccess any signals we received before installing our handler
318 SigchldHandler();
319}
320
321llvm::Expected<std::vector<::pid_t>> NativeProcessLinux::Attach(::pid_t pid) {
322 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
323
324 Status status;
325 // Use a map to keep track of the threads which we have attached/need to
326 // attach.
327 Host::TidMap tids_to_attach;
328 while (Host::FindProcessThreads(pid, tids_to_attach)) {
329 for (Host::TidMap::iterator it = tids_to_attach.begin();
330 it != tids_to_attach.end();) {
331 if (it->second == false) {
332 lldb::tid_t tid = it->first;
333
334 // Attach to the requested process.
335 // An attach will cause the thread to stop with a SIGSTOP.
336 if ((status = PtraceWrapper(PTRACE_ATTACH, tid)).Fail()) {
337 // No such thread. The thread may have exited.
338 // More error handling may be needed.
339 if (status.GetError() == ESRCH3) {
340 it = tids_to_attach.erase(it);
341 continue;
342 }
343 return status.ToError();
344 }
345
346 int wpid =
347 llvm::sys::RetryAfterSignal(-1, ::waitpid, tid, nullptr, __WALL0x40000000);
348 // Need to use __WALL otherwise we receive an error with errno=ECHLD
349 // At this point we should have a thread stopped if waitpid succeeds.
350 if (wpid < 0) {
351 // No such thread. The thread may have exited.
352 // More error handling may be needed.
353 if (errno(*__errno_location ()) == ESRCH3) {
354 it = tids_to_attach.erase(it);
355 continue;
356 }
357 return llvm::errorCodeToError(
358 std::error_code(errno(*__errno_location ()), std::generic_category()));
359 }
360
361 if ((status = SetDefaultPtraceOpts(tid)).Fail())
362 return status.ToError();
363
364 LLDB_LOG(log, "adding tid = {0}", tid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "adding tid = {0}", tid); } while (0)
;
365 it->second = true;
366 }
367
368 // move the loop forward
369 ++it;
370 }
371 }
372
373 size_t tid_count = tids_to_attach.size();
374 if (tid_count == 0)
375 return llvm::make_error<StringError>("No such process",
376 llvm::inconvertibleErrorCode());
377
378 std::vector<::pid_t> tids;
379 tids.reserve(tid_count);
380 for (const auto &p : tids_to_attach)
381 tids.push_back(p.first);
382 return std::move(tids);
383}
384
385Status NativeProcessLinux::SetDefaultPtraceOpts(lldb::pid_t pid) {
386 long ptrace_opts = 0;
387
388 // Have the child raise an event on exit. This is used to keep the child in
389 // limbo until it is destroyed.
390 ptrace_opts |= PTRACE_O_TRACEEXIT;
391
392 // Have the tracer trace threads which spawn in the inferior process.
393 // TODO: if we want to support tracing the inferiors' child, add the
394 // appropriate ptrace flags here (PTRACE_O_TRACEFORK, PTRACE_O_TRACEVFORK)
395 ptrace_opts |= PTRACE_O_TRACECLONE;
396
397 // Have the tracer notify us before execve returns
398 // (needed to disable legacy SIGTRAP generation)
399 ptrace_opts |= PTRACE_O_TRACEEXEC;
400
401 return PtraceWrapper(PTRACE_SETOPTIONS, pid, nullptr, (void *)ptrace_opts);
402}
403
404// Handles all waitpid events from the inferior process.
405void NativeProcessLinux::MonitorCallback(lldb::pid_t pid, bool exited,
406 WaitStatus status) {
407 Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1)));
408
409 // Certain activities differ based on whether the pid is the tid of the main
410 // thread.
411 const bool is_main_thread = (pid == GetID());
412
413 // Handle when the thread exits.
414 if (exited) {
27
Taking false branch
415 LLDB_LOG(log, "got exit signal({0}) , tid = {1} ({2} main thread)", signal,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "got exit signal({0}) , tid = {1} ({2} main thread)"
, signal, pid, is_main_thread ? "is" : "is not"); } while (0)
416 pid, is_main_thread ? "is" : "is not")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "got exit signal({0}) , tid = {1} ({2} main thread)"
, signal, pid, is_main_thread ? "is" : "is not"); } while (0)
;
417
418 // This is a thread that exited. Ensure we're not tracking it anymore.
419 const bool thread_found = StopTrackingThread(pid);
420
421 if (is_main_thread) {
422 // We only set the exit status and notify the delegate if we haven't
423 // already set the process
424 // state to an exited state. We normally should have received a SIGTRAP |
425 // (PTRACE_EVENT_EXIT << 8)
426 // for the main thread.
427 const bool already_notified = (GetState() == StateType::eStateExited) ||
428 (GetState() == StateType::eStateCrashed);
429 if (!already_notified) {
430 LLDB_LOG(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling main thread exit ({1}), expected exit state "
"already set but state was {2} instead, setting exit state now"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
, GetState()); } while (0)
431 log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling main thread exit ({1}), expected exit state "
"already set but state was {2} instead, setting exit state now"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
, GetState()); } while (0)
432 "tid = {0} handling main thread exit ({1}), expected exit state "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling main thread exit ({1}), expected exit state "
"already set but state was {2} instead, setting exit state now"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
, GetState()); } while (0)
433 "already set but state was {2} instead, setting exit state now",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling main thread exit ({1}), expected exit state "
"already set but state was {2} instead, setting exit state now"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
, GetState()); } while (0)
434 pid,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling main thread exit ({1}), expected exit state "
"already set but state was {2} instead, setting exit state now"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
, GetState()); } while (0)
435 thread_found ? "stopped tracking thread metadata"do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling main thread exit ({1}), expected exit state "
"already set but state was {2} instead, setting exit state now"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
, GetState()); } while (0)
436 : "thread metadata not found",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling main thread exit ({1}), expected exit state "
"already set but state was {2} instead, setting exit state now"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
, GetState()); } while (0)
437 GetState())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling main thread exit ({1}), expected exit state "
"already set but state was {2} instead, setting exit state now"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
, GetState()); } while (0)
;
438 // The main thread exited. We're done monitoring. Report to delegate.
439 SetExitStatus(status, true);
440
441 // Notify delegate that our process has exited.
442 SetState(StateType::eStateExited, true);
443 } else
444 LLDB_LOG(log, "tid = {0} main thread now exited (%s)", pid,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} main thread now exited (%s)", pid,
thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
); } while (0)
445 thread_found ? "stopped tracking thread metadata"do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} main thread now exited (%s)", pid,
thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
); } while (0)
446 : "thread metadata not found")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} main thread now exited (%s)", pid,
thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
); } while (0)
;
447 } else {
448 // Do we want to report to the delegate in this case? I think not. If
449 // this was an orderly thread exit, we would already have received the
450 // SIGTRAP | (PTRACE_EVENT_EXIT << 8) signal, and we would have done an
451 // all-stop then.
452 LLDB_LOG(log, "tid = {0} handling non-main thread exit (%s)", pid,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling non-main thread exit (%s)"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
); } while (0)
453 thread_found ? "stopped tracking thread metadata"do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling non-main thread exit (%s)"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
); } while (0)
454 : "thread metadata not found")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid = {0} handling non-main thread exit (%s)"
, pid, thread_found ? "stopped tracking thread metadata" : "thread metadata not found"
); } while (0)
;
455 }
456 return;
457 }
458
459 siginfo_t info;
460 const auto info_err = GetSignalInfo(pid, &info);
28
Calling 'NativeProcessLinux::GetSignalInfo'
461 auto thread_sp = GetThreadByID(pid);
462
463 if (!thread_sp) {
464 // Normally, the only situation when we cannot find the thread is if we have
465 // just received a new thread notification. This is indicated by
466 // GetSignalInfo() returning si_code == SI_USER and si_pid == 0
467 LLDB_LOG(log, "received notification about an unknown tid {0}.", pid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received notification about an unknown tid {0}."
, pid); } while (0)
;
468
469 if (info_err.Fail()) {
470 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "(tid {0}) GetSignalInfo failed ({1}). " "Ingoring this notification."
, pid, info_err); } while (0)
471 "(tid {0}) GetSignalInfo failed ({1}). "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "(tid {0}) GetSignalInfo failed ({1}). " "Ingoring this notification."
, pid, info_err); } while (0)
472 "Ingoring this notification.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "(tid {0}) GetSignalInfo failed ({1}). " "Ingoring this notification."
, pid, info_err); } while (0)
473 pid, info_err)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "(tid {0}) GetSignalInfo failed ({1}). " "Ingoring this notification."
, pid, info_err); } while (0)
;
474 return;
475 }
476
477 LLDB_LOG(log, "tid {0}, si_code: {1}, si_pid: {2}", pid, info.si_code,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid {0}, si_code: {1}, si_pid: {2}", pid, info
.si_code, info._sifields._kill.si_pid); } while (0)
478 info.si_pid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid {0}, si_code: {1}, si_pid: {2}", pid, info
.si_code, info._sifields._kill.si_pid); } while (0)
;
479
480 NativeThreadLinux &thread = AddThread(pid);
481
482 // Resume the newly created thread.
483 ResumeThread(thread, eStateRunning, LLDB_INVALID_SIGNAL_NUMBER(2147483647));
484 ThreadWasCreated(thread);
485 return;
486 }
487
488 // Get details on the signal raised.
489 if (info_err.Success()) {
490 // We have retrieved the signal info. Dispatch appropriately.
491 if (info.si_signo == SIGTRAP5)
492 MonitorSIGTRAP(info, *thread_sp);
493 else
494 MonitorSignal(info, *thread_sp, exited);
495 } else {
496 if (info_err.GetError() == EINVAL22) {
497 // This is a group stop reception for this tid.
498 // We can reach here if we reinject SIGSTOP, SIGSTP, SIGTTIN or SIGTTOU
499 // into the tracee, triggering the group-stop mechanism. Normally
500 // receiving these would stop the process, pending a SIGCONT. Simulating
501 // this state in a debugger is hard and is generally not needed (one use
502 // case is debugging background task being managed by a shell). For
503 // general use, it is sufficient to stop the process in a signal-delivery
504 // stop which happens before the group stop. This done by MonitorSignal
505 // and works correctly for all signals.
506 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received a group stop for pid {0} tid {1}. Transparent "
"handling of group stops not supported, resuming the " "thread."
, GetID(), pid); } while (0)
507 "received a group stop for pid {0} tid {1}. Transparent "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received a group stop for pid {0} tid {1}. Transparent "
"handling of group stops not supported, resuming the " "thread."
, GetID(), pid); } while (0)
508 "handling of group stops not supported, resuming the "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received a group stop for pid {0} tid {1}. Transparent "
"handling of group stops not supported, resuming the " "thread."
, GetID(), pid); } while (0)
509 "thread.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received a group stop for pid {0} tid {1}. Transparent "
"handling of group stops not supported, resuming the " "thread."
, GetID(), pid); } while (0)
510 GetID(), pid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received a group stop for pid {0} tid {1}. Transparent "
"handling of group stops not supported, resuming the " "thread."
, GetID(), pid); } while (0)
;
511 ResumeThread(*thread_sp, thread_sp->GetState(),
512 LLDB_INVALID_SIGNAL_NUMBER(2147483647));
513 } else {
514 // ptrace(GETSIGINFO) failed (but not due to group-stop).
515
516 // A return value of ESRCH means the thread/process is no longer on the
517 // system, so it was killed somehow outside of our control. Either way,
518 // we can't do anything with it anymore.
519
520 // Stop tracking the metadata for the thread since it's entirely off the
521 // system now.
522 const bool thread_found = StopTrackingThread(pid);
523
524 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "GetSignalInfo failed: {0}, tid = {1}, signal = {2}, "
"status = {3}, main_thread = {4}, thread_found: {5}", info_err
, pid, signal, status, is_main_thread, thread_found); } while
(0)
525 "GetSignalInfo failed: {0}, tid = {1}, signal = {2}, "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "GetSignalInfo failed: {0}, tid = {1}, signal = {2}, "
"status = {3}, main_thread = {4}, thread_found: {5}", info_err
, pid, signal, status, is_main_thread, thread_found); } while
(0)
526 "status = {3}, main_thread = {4}, thread_found: {5}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "GetSignalInfo failed: {0}, tid = {1}, signal = {2}, "
"status = {3}, main_thread = {4}, thread_found: {5}", info_err
, pid, signal, status, is_main_thread, thread_found); } while
(0)
527 info_err, pid, signal, status, is_main_thread, thread_found)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "GetSignalInfo failed: {0}, tid = {1}, signal = {2}, "
"status = {3}, main_thread = {4}, thread_found: {5}", info_err
, pid, signal, status, is_main_thread, thread_found); } while
(0)
;
528
529 if (is_main_thread) {
530 // Notify the delegate - our process is not available but appears to
531 // have been killed outside
532 // our control. Is eStateExited the right exit state in this case?
533 SetExitStatus(status, true);
534 SetState(StateType::eStateExited, true);
535 } else {
536 // This thread was pulled out from underneath us. Anything to do here?
537 // Do we want to do an all stop?
538 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1} non-main thread exit occurred, didn't "
"tell delegate anything since thread disappeared out " "from underneath us"
, GetID(), pid); } while (0)
539 "pid {0} tid {1} non-main thread exit occurred, didn't "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1} non-main thread exit occurred, didn't "
"tell delegate anything since thread disappeared out " "from underneath us"
, GetID(), pid); } while (0)
540 "tell delegate anything since thread disappeared out "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1} non-main thread exit occurred, didn't "
"tell delegate anything since thread disappeared out " "from underneath us"
, GetID(), pid); } while (0)
541 "from underneath us",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1} non-main thread exit occurred, didn't "
"tell delegate anything since thread disappeared out " "from underneath us"
, GetID(), pid); } while (0)
542 GetID(), pid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1} non-main thread exit occurred, didn't "
"tell delegate anything since thread disappeared out " "from underneath us"
, GetID(), pid); } while (0)
;
543 }
544 }
545 }
546}
547
548void NativeProcessLinux::WaitForNewThread(::pid_t tid) {
549 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
550
551 if (GetThreadByID(tid)) {
552 // We are already tracking the thread - we got the event on the new thread
553 // (see MonitorSignal) before this one. We are done.
554 return;
555 }
556
557 // The thread is not tracked yet, let's wait for it to appear.
558 int status = -1;
559 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received thread creation event for tid {0}. tid not tracked "
"yet, waiting for thread to appear...", tid); } while (0)
560 "received thread creation event for tid {0}. tid not tracked "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received thread creation event for tid {0}. tid not tracked "
"yet, waiting for thread to appear...", tid); } while (0)
561 "yet, waiting for thread to appear...",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received thread creation event for tid {0}. tid not tracked "
"yet, waiting for thread to appear...", tid); } while (0)
562 tid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received thread creation event for tid {0}. tid not tracked "
"yet, waiting for thread to appear...", tid); } while (0)
;
563 ::pid_t wait_pid = llvm::sys::RetryAfterSignal(-1, ::waitpid, tid, &status, __WALL0x40000000);
564 // Since we are waiting on a specific tid, this must be the creation event.
565 // But let's do some checks just in case.
566 if (wait_pid != tid) {
567 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waiting for tid {0} failed. Assuming the thread has "
"disappeared in the meantime", tid); } while (0)
568 "waiting for tid {0} failed. Assuming the thread has "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waiting for tid {0} failed. Assuming the thread has "
"disappeared in the meantime", tid); } while (0)
569 "disappeared in the meantime",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waiting for tid {0} failed. Assuming the thread has "
"disappeared in the meantime", tid); } while (0)
570 tid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waiting for tid {0} failed. Assuming the thread has "
"disappeared in the meantime", tid); } while (0)
;
571 // The only way I know of this could happen is if the whole process was
572 // SIGKILLed in the mean time. In any case, we can't do anything about that
573 // now.
574 return;
575 }
576 if (WIFEXITED(status)(((status) & 0x7f) == 0)) {
577 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waiting for tid {0} returned an 'exited' event. Not "
"tracking the thread.", tid); } while (0)
578 "waiting for tid {0} returned an 'exited' event. Not "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waiting for tid {0} returned an 'exited' event. Not "
"tracking the thread.", tid); } while (0)
579 "tracking the thread.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waiting for tid {0} returned an 'exited' event. Not "
"tracking the thread.", tid); } while (0)
580 tid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waiting for tid {0} returned an 'exited' event. Not "
"tracking the thread.", tid); } while (0)
;
581 // Also a very improbable event.
582 return;
583 }
584
585 LLDB_LOG(log, "pid = {0}: tracking new thread tid {1}", GetID(), tid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0}: tracking new thread tid {1}", GetID
(), tid); } while (0)
;
586 NativeThreadLinux &new_thread = AddThread(tid);
587
588 ResumeThread(new_thread, eStateRunning, LLDB_INVALID_SIGNAL_NUMBER(2147483647));
589 ThreadWasCreated(new_thread);
590}
591
592void NativeProcessLinux::MonitorSIGTRAP(const siginfo_t &info,
593 NativeThreadLinux &thread) {
594 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
595 const bool is_main_thread = (thread.GetID() == GetID());
596
597 assert(info.si_signo == SIGTRAP && "Unexpected child signal!")((info.si_signo == 5 && "Unexpected child signal!") ?
static_cast<void> (0) : __assert_fail ("info.si_signo == SIGTRAP && \"Unexpected child signal!\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 597, __PRETTY_FUNCTION__))
;
598
599 switch (info.si_code) {
600 // TODO: these two cases are required if we want to support tracing of the
601 // inferiors' children. We'd need this to debug a monitor.
602 // case (SIGTRAP | (PTRACE_EVENT_FORK << 8)):
603 // case (SIGTRAP | (PTRACE_EVENT_VFORK << 8)):
604
605 case (SIGTRAP5 | (PTRACE_EVENT_CLONE << 8)): {
606 // This is the notification on the parent thread which informs us of new
607 // thread
608 // creation.
609 // We don't want to do anything with the parent thread so we just resume it.
610 // In case we
611 // want to implement "break on thread creation" functionality, we would need
612 // to stop
613 // here.
614
615 unsigned long event_message = 0;
616 if (GetEventMessage(thread.GetID(), &event_message).Fail()) {
617 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} received thread creation event but "
"GetEventMessage failed so we don't know the new tid", thread
.GetID()); } while (0)
618 "pid {0} received thread creation event but "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} received thread creation event but "
"GetEventMessage failed so we don't know the new tid", thread
.GetID()); } while (0)
619 "GetEventMessage failed so we don't know the new tid",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} received thread creation event but "
"GetEventMessage failed so we don't know the new tid", thread
.GetID()); } while (0)
620 thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} received thread creation event but "
"GetEventMessage failed so we don't know the new tid", thread
.GetID()); } while (0)
;
621 } else
622 WaitForNewThread(event_message);
623
624 ResumeThread(thread, thread.GetState(), LLDB_INVALID_SIGNAL_NUMBER(2147483647));
625 break;
626 }
627
628 case (SIGTRAP5 | (PTRACE_EVENT_EXEC << 8)): {
629 LLDB_LOG(log, "received exec event, code = {0}", info.si_code ^ SIGTRAP)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received exec event, code = {0}", info.si_code
^ 5); } while (0)
;
630
631 // Exec clears any pending notifications.
632 m_pending_notification_tid = LLDB_INVALID_THREAD_ID0;
633
634 // Remove all but the main thread here. Linux fork creates a new process
635 // which only copies the main thread.
636 LLDB_LOG(log, "exec received, stop tracking all but main thread")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "exec received, stop tracking all but main thread"
); } while (0)
;
637
638 for (auto i = m_threads.begin(); i != m_threads.end();) {
639 if ((*i)->GetID() == GetID())
640 i = m_threads.erase(i);
641 else
642 ++i;
643 }
644 assert(m_threads.size() == 1)((m_threads.size() == 1) ? static_cast<void> (0) : __assert_fail
("m_threads.size() == 1", "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 644, __PRETTY_FUNCTION__))
;
645 auto *main_thread = static_cast<NativeThreadLinux *>(m_threads[0].get());
646
647 SetCurrentThreadID(main_thread->GetID());
648 main_thread->SetStoppedByExec();
649
650 // Tell coordinator about about the "new" (since exec) stopped main thread.
651 ThreadWasCreated(*main_thread);
652
653 // Let our delegate know we have just exec'd.
654 NotifyDidExec();
655
656 // Let the process know we're stopped.
657 StopRunningThreads(main_thread->GetID());
658
659 break;
660 }
661
662 case (SIGTRAP5 | (PTRACE_EVENT_EXIT << 8)): {
663 // The inferior process or one of its threads is about to exit.
664 // We don't want to do anything with the thread so we just resume it. In
665 // case we
666 // want to implement "break on thread exit" functionality, we would need to
667 // stop
668 // here.
669
670 unsigned long data = 0;
671 if (GetEventMessage(thread.GetID(), &data).Fail())
672 data = -1;
673
674 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received PTRACE_EVENT_EXIT, data = {0:x}, WIFEXITED={1}, "
"WIFSIGNALED={2}, pid = {3}, main_thread = {4}", data, (((data
) & 0x7f) == 0), (((signed char) (((data) & 0x7f) + 1
) >> 1) > 0), thread.GetID(), is_main_thread); } while
(0)
675 "received PTRACE_EVENT_EXIT, data = {0:x}, WIFEXITED={1}, "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received PTRACE_EVENT_EXIT, data = {0:x}, WIFEXITED={1}, "
"WIFSIGNALED={2}, pid = {3}, main_thread = {4}", data, (((data
) & 0x7f) == 0), (((signed char) (((data) & 0x7f) + 1
) >> 1) > 0), thread.GetID(), is_main_thread); } while
(0)
676 "WIFSIGNALED={2}, pid = {3}, main_thread = {4}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received PTRACE_EVENT_EXIT, data = {0:x}, WIFEXITED={1}, "
"WIFSIGNALED={2}, pid = {3}, main_thread = {4}", data, (((data
) & 0x7f) == 0), (((signed char) (((data) & 0x7f) + 1
) >> 1) > 0), thread.GetID(), is_main_thread); } while
(0)
677 data, WIFEXITED(data), WIFSIGNALED(data), thread.GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received PTRACE_EVENT_EXIT, data = {0:x}, WIFEXITED={1}, "
"WIFSIGNALED={2}, pid = {3}, main_thread = {4}", data, (((data
) & 0x7f) == 0), (((signed char) (((data) & 0x7f) + 1
) >> 1) > 0), thread.GetID(), is_main_thread); } while
(0)
678 is_main_thread)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received PTRACE_EVENT_EXIT, data = {0:x}, WIFEXITED={1}, "
"WIFSIGNALED={2}, pid = {3}, main_thread = {4}", data, (((data
) & 0x7f) == 0), (((signed char) (((data) & 0x7f) + 1
) >> 1) > 0), thread.GetID(), is_main_thread); } while
(0)
;
679
680 if (is_main_thread)
681 SetExitStatus(WaitStatus::Decode(data), true);
682
683 StateType state = thread.GetState();
684 if (!StateIsRunningState(state)) {
685 // Due to a kernel bug, we may sometimes get this stop after the inferior
686 // gets a
687 // SIGKILL. This confuses our state tracking logic in ResumeThread(),
688 // since normally,
689 // we should not be receiving any ptrace events while the inferior is
690 // stopped. This
691 // makes sure that the inferior is resumed and exits normally.
692 state = eStateRunning;
693 }
694 ResumeThread(thread, state, LLDB_INVALID_SIGNAL_NUMBER(2147483647));
695
696 break;
697 }
698
699 case 0:
700 case TRAP_TRACETRAP_TRACE: // We receive this on single stepping.
701 case TRAP_HWBKPT4: // We receive this on watchpoint hit
702 {
703 // If a watchpoint was hit, report it
704 uint32_t wp_index;
705 Status error = thread.GetRegisterContext()->GetWatchpointHitIndex(
706 wp_index, (uintptr_t)info.si_addr_sifields._sigfault.si_addr);
707 if (error.Fail())
708 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for watchpoint hits, pid = "
"{0}, error = {1}", thread.GetID(), error); } while (0)
709 "received error while checking for watchpoint hits, pid = "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for watchpoint hits, pid = "
"{0}, error = {1}", thread.GetID(), error); } while (0)
710 "{0}, error = {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for watchpoint hits, pid = "
"{0}, error = {1}", thread.GetID(), error); } while (0)
711 thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for watchpoint hits, pid = "
"{0}, error = {1}", thread.GetID(), error); } while (0)
;
712 if (wp_index != LLDB_INVALID_INDEX32(4294967295U)) {
713 MonitorWatchpoint(thread, wp_index);
714 break;
715 }
716
717 // If a breakpoint was hit, report it
718 uint32_t bp_index;
719 error = thread.GetRegisterContext()->GetHardwareBreakHitIndex(
720 bp_index, (uintptr_t)info.si_addr_sifields._sigfault.si_addr);
721 if (error.Fail())
722 LLDB_LOG(log, "received error while checking for hardware "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for hardware "
"breakpoint hits, pid = {0}, error = {1}", thread.GetID(), error
); } while (0)
723 "breakpoint hits, pid = {0}, error = {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for hardware "
"breakpoint hits, pid = {0}, error = {1}", thread.GetID(), error
); } while (0)
724 thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for hardware "
"breakpoint hits, pid = {0}, error = {1}", thread.GetID(), error
); } while (0)
;
725 if (bp_index != LLDB_INVALID_INDEX32(4294967295U)) {
726 MonitorBreakpoint(thread);
727 break;
728 }
729
730 // Otherwise, report step over
731 MonitorTrace(thread);
732 break;
733 }
734
735 case SI_KERNELSI_KERNEL:
736#if defined __mips__
737 // For mips there is no special signal for watchpoint
738 // So we check for watchpoint in kernel trap
739 {
740 // If a watchpoint was hit, report it
741 uint32_t wp_index;
742 Status error = thread.GetRegisterContext()->GetWatchpointHitIndex(
743 wp_index, LLDB_INVALID_ADDRESS(18446744073709551615UL));
744 if (error.Fail())
745 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for watchpoint hits, pid = "
"{0}, error = {1}", thread.GetID(), error); } while (0)
746 "received error while checking for watchpoint hits, pid = "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for watchpoint hits, pid = "
"{0}, error = {1}", thread.GetID(), error); } while (0)
747 "{0}, error = {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for watchpoint hits, pid = "
"{0}, error = {1}", thread.GetID(), error); } while (0)
748 thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received error while checking for watchpoint hits, pid = "
"{0}, error = {1}", thread.GetID(), error); } while (0)
;
749 if (wp_index != LLDB_INVALID_INDEX32(4294967295U)) {
750 MonitorWatchpoint(thread, wp_index);
751 break;
752 }
753 }
754// NO BREAK
755#endif
756 case TRAP_BRKPTTRAP_BRKPT:
757 MonitorBreakpoint(thread);
758 break;
759
760 case SIGTRAP5:
761 case (SIGTRAP5 | 0x80):
762 LLDB_LOG(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming"
, info.si_code, GetID(), thread.GetID()); } while (0)
763 log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming"
, info.si_code, GetID(), thread.GetID()); } while (0)
764 "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming"
, info.si_code, GetID(), thread.GetID()); } while (0)
765 info.si_code, GetID(), thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming"
, info.si_code, GetID(), thread.GetID()); } while (0)
;
766
767 // Ignore these signals until we know more about them.
768 ResumeThread(thread, thread.GetState(), LLDB_INVALID_SIGNAL_NUMBER(2147483647));
769 break;
770
771 default:
772 LLDB_LOG(log, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}"
, info.si_code, GetID(), thread.GetID()); } while (0)
773 info.si_code, GetID(), thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}"
, info.si_code, GetID(), thread.GetID()); } while (0)
;
774 MonitorSignal(info, thread, false);
775 break;
776 }
777}
778
779void NativeProcessLinux::MonitorTrace(NativeThreadLinux &thread) {
780 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
781 LLDB_LOG(log, "received trace event, pid = {0}", thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received trace event, pid = {0}", thread.GetID
()); } while (0)
;
782
783 // This thread is currently stopped.
784 thread.SetStoppedByTrace();
785
786 StopRunningThreads(thread.GetID());
787}
788
789void NativeProcessLinux::MonitorBreakpoint(NativeThreadLinux &thread) {
790 Log *log(
791 GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1) | LIBLLDB_LOG_BREAKPOINTS(1u << 5)));
792 LLDB_LOG(log, "received breakpoint event, pid = {0}", thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received breakpoint event, pid = {0}", thread
.GetID()); } while (0)
;
793
794 // Mark the thread as stopped at breakpoint.
795 thread.SetStoppedByBreakpoint();
796 Status error = FixupBreakpointPCAsNeeded(thread);
797 if (error.Fail())
798 LLDB_LOG(log, "pid = {0} fixup: {1}", thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0} fixup: {1}", thread.GetID(), error
); } while (0)
;
799
800 if (m_threads_stepping_with_breakpoint.find(thread.GetID()) !=
801 m_threads_stepping_with_breakpoint.end())
802 thread.SetStoppedByTrace();
803
804 StopRunningThreads(thread.GetID());
805}
806
807void NativeProcessLinux::MonitorWatchpoint(NativeThreadLinux &thread,
808 uint32_t wp_index) {
809 Log *log(
810 GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1) | LIBLLDB_LOG_WATCHPOINTS(1u << 6)));
811 LLDB_LOG(log, "received watchpoint event, pid = {0}, wp_index = {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received watchpoint event, pid = {0}, wp_index = {1}"
, thread.GetID(), wp_index); } while (0)
812 thread.GetID(), wp_index)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received watchpoint event, pid = {0}, wp_index = {1}"
, thread.GetID(), wp_index); } while (0)
;
813
814 // Mark the thread as stopped at watchpoint.
815 // The address is at (lldb::addr_t)info->si_addr if we need it.
816 thread.SetStoppedByWatchpoint(wp_index);
817
818 // We need to tell all other running threads before we notify the delegate
819 // about this stop.
820 StopRunningThreads(thread.GetID());
821}
822
823void NativeProcessLinux::MonitorSignal(const siginfo_t &info,
824 NativeThreadLinux &thread, bool exited) {
825 const int signo = info.si_signo;
826 const bool is_from_llgs = info.si_pid_sifields._kill.si_pid == getpid();
827
828 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
829
830 // POSIX says that process behaviour is undefined after it ignores a SIGFPE,
831 // SIGILL, SIGSEGV, or SIGBUS *unless* that signal was generated by a
832 // kill(2) or raise(3). Similarly for tgkill(2) on Linux.
833 //
834 // IOW, user generated signals never generate what we consider to be a
835 // "crash".
836 //
837 // Similarly, ACK signals generated by this monitor.
838
839 // Handle the signal.
840 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, "
"waitpid pid = {4})", Host::GetSignalAsCString(signo), signo
, info.si_code, thread.GetID()); } while (0)
841 "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, "
"waitpid pid = {4})", Host::GetSignalAsCString(signo), signo
, info.si_code, thread.GetID()); } while (0)
842 "waitpid pid = {4})",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, "
"waitpid pid = {4})", Host::GetSignalAsCString(signo), signo
, info.si_code, thread.GetID()); } while (0)
843 Host::GetSignalAsCString(signo), signo, info.si_code,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, "
"waitpid pid = {4})", Host::GetSignalAsCString(signo), signo
, info.si_code, thread.GetID()); } while (0)
844 thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, "
"waitpid pid = {4})", Host::GetSignalAsCString(signo), signo
, info.si_code, thread.GetID()); } while (0)
;
845
846 // Check for thread stop notification.
847 if (is_from_llgs && (info.si_code == SI_TKILLSI_TKILL) && (signo == SIGSTOP19)) {
848 // This is a tgkill()-based stop.
849 LLDB_LOG(log, "pid {0} tid {1}, thread stopped", GetID(), thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}, thread stopped", GetID(), thread
.GetID()); } while (0)
;
850
851 // Check that we're not already marked with a stop reason.
852 // Note this thread really shouldn't already be marked as stopped - if we
853 // were, that would imply that the kernel signaled us with the thread
854 // stopping which we handled and marked as stopped, and that, without an
855 // intervening resume, we received another stop. It is more likely that we
856 // are missing the marking of a run state somewhere if we find that the
857 // thread was marked as stopped.
858 const StateType thread_state = thread.GetState();
859 if (!StateIsStoppedState(thread_state, false)) {
860 // An inferior thread has stopped because of a SIGSTOP we have sent it.
861 // Generally, these are not important stops and we don't want to report
862 // them as they are just used to stop other threads when one thread (the
863 // one with the *real* stop reason) hits a breakpoint (watchpoint,
864 // etc...). However, in the case of an asynchronous Interrupt(), this *is*
865 // the real stop reason, so we leave the signal intact if this is the
866 // thread that was chosen as the triggering thread.
867 if (m_pending_notification_tid != LLDB_INVALID_THREAD_ID0) {
868 if (m_pending_notification_tid == thread.GetID())
869 thread.SetStoppedBySignal(SIGSTOP19, &info);
870 else
871 thread.SetStoppedWithNoReason();
872
873 SetCurrentThreadID(thread.GetID());
874 SignalIfAllThreadsStopped();
875 } else {
876 // We can end up here if stop was initiated by LLGS but by this time a
877 // thread stop has occurred - maybe initiated by another event.
878 Status error = ResumeThread(thread, thread.GetState(), 0);
879 if (error.Fail())
880 LLDB_LOG(log, "failed to resume thread {0}: {1}", thread.GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to resume thread {0}: {1}", thread.GetID
(), error); } while (0)
881 error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to resume thread {0}: {1}", thread.GetID
(), error); } while (0)
;
882 }
883 } else {
884 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}, thread was already marked as a stopped "
"state (state={2}), leaving stop signal as is", GetID(), thread
.GetID(), thread_state); } while (0)
885 "pid {0} tid {1}, thread was already marked as a stopped "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}, thread was already marked as a stopped "
"state (state={2}), leaving stop signal as is", GetID(), thread
.GetID(), thread_state); } while (0)
886 "state (state={2}), leaving stop signal as is",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}, thread was already marked as a stopped "
"state (state={2}), leaving stop signal as is", GetID(), thread
.GetID(), thread_state); } while (0)
887 GetID(), thread.GetID(), thread_state)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}, thread was already marked as a stopped "
"state (state={2}), leaving stop signal as is", GetID(), thread
.GetID(), thread_state); } while (0)
;
888 SignalIfAllThreadsStopped();
889 }
890
891 // Done handling.
892 return;
893 }
894
895 // Check if debugger should stop at this signal or just ignore it
896 // and resume the inferior.
897 if (m_signals_to_ignore.find(signo) != m_signals_to_ignore.end()) {
898 ResumeThread(thread, thread.GetState(), signo);
899 return;
900 }
901
902 // This thread is stopped.
903 LLDB_LOG(log, "received signal {0}", Host::GetSignalAsCString(signo))do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "received signal {0}", Host::GetSignalAsCString
(signo)); } while (0)
;
904 thread.SetStoppedBySignal(signo, &info);
905
906 // Send a stop to the debugger after we get all other threads to stop.
907 StopRunningThreads(thread.GetID());
908}
909
910namespace {
911
912struct EmulatorBaton {
913 NativeProcessLinux *m_process;
914 NativeRegisterContext *m_reg_context;
915
916 // eRegisterKindDWARF -> RegsiterValue
917 std::unordered_map<uint32_t, RegisterValue> m_register_values;
918
919 EmulatorBaton(NativeProcessLinux *process, NativeRegisterContext *reg_context)
920 : m_process(process), m_reg_context(reg_context) {}
921};
922
923} // anonymous namespace
924
925static size_t ReadMemoryCallback(EmulateInstruction *instruction, void *baton,
926 const EmulateInstruction::Context &context,
927 lldb::addr_t addr, void *dst, size_t length) {
928 EmulatorBaton *emulator_baton = static_cast<EmulatorBaton *>(baton);
929
930 size_t bytes_read;
931 emulator_baton->m_process->ReadMemory(addr, dst, length, bytes_read);
932 return bytes_read;
933}
934
935static bool ReadRegisterCallback(EmulateInstruction *instruction, void *baton,
936 const RegisterInfo *reg_info,
937 RegisterValue &reg_value) {
938 EmulatorBaton *emulator_baton = static_cast<EmulatorBaton *>(baton);
939
940 auto it = emulator_baton->m_register_values.find(
941 reg_info->kinds[eRegisterKindDWARF]);
942 if (it != emulator_baton->m_register_values.end()) {
943 reg_value = it->second;
944 return true;
945 }
946
947 // The emulator only fill in the dwarf regsiter numbers (and in some case
948 // the generic register numbers). Get the full register info from the
949 // register context based on the dwarf register numbers.
950 const RegisterInfo *full_reg_info =
951 emulator_baton->m_reg_context->GetRegisterInfo(
952 eRegisterKindDWARF, reg_info->kinds[eRegisterKindDWARF]);
953
954 Status error =
955 emulator_baton->m_reg_context->ReadRegister(full_reg_info, reg_value);
956 if (error.Success())
957 return true;
958
959 return false;
960}
961
962static bool WriteRegisterCallback(EmulateInstruction *instruction, void *baton,
963 const EmulateInstruction::Context &context,
964 const RegisterInfo *reg_info,
965 const RegisterValue &reg_value) {
966 EmulatorBaton *emulator_baton = static_cast<EmulatorBaton *>(baton);
967 emulator_baton->m_register_values[reg_info->kinds[eRegisterKindDWARF]] =
968 reg_value;
969 return true;
970}
971
972static size_t WriteMemoryCallback(EmulateInstruction *instruction, void *baton,
973 const EmulateInstruction::Context &context,
974 lldb::addr_t addr, const void *dst,
975 size_t length) {
976 return length;
977}
978
979static lldb::addr_t ReadFlags(NativeRegisterContext *regsiter_context) {
980 const RegisterInfo *flags_info = regsiter_context->GetRegisterInfo(
981 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS4);
982 return regsiter_context->ReadRegisterAsUnsigned(flags_info,
983 LLDB_INVALID_ADDRESS(18446744073709551615UL));
984}
985
986Status
987NativeProcessLinux::SetupSoftwareSingleStepping(NativeThreadLinux &thread) {
988 Status error;
989 NativeRegisterContextSP register_context_sp = thread.GetRegisterContext();
990
991 std::unique_ptr<EmulateInstruction> emulator_ap(
992 EmulateInstruction::FindPlugin(m_arch, eInstructionTypePCModifying,
993 nullptr));
994
995 if (emulator_ap == nullptr)
996 return Status("Instruction emulator not found!");
997
998 EmulatorBaton baton(this, register_context_sp.get());
999 emulator_ap->SetBaton(&baton);
1000 emulator_ap->SetReadMemCallback(&ReadMemoryCallback);
1001 emulator_ap->SetReadRegCallback(&ReadRegisterCallback);
1002 emulator_ap->SetWriteMemCallback(&WriteMemoryCallback);
1003 emulator_ap->SetWriteRegCallback(&WriteRegisterCallback);
1004
1005 if (!emulator_ap->ReadInstruction())
1006 return Status("Read instruction failed!");
1007
1008 bool emulation_result =
1009 emulator_ap->EvaluateInstruction(eEmulateInstructionOptionAutoAdvancePC);
1010
1011 const RegisterInfo *reg_info_pc = register_context_sp->GetRegisterInfo(
1012 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC0);
1013 const RegisterInfo *reg_info_flags = register_context_sp->GetRegisterInfo(
1014 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS4);
1015
1016 auto pc_it =
1017 baton.m_register_values.find(reg_info_pc->kinds[eRegisterKindDWARF]);
1018 auto flags_it =
1019 baton.m_register_values.find(reg_info_flags->kinds[eRegisterKindDWARF]);
1020
1021 lldb::addr_t next_pc;
1022 lldb::addr_t next_flags;
1023 if (emulation_result) {
1024 assert(pc_it != baton.m_register_values.end() &&((pc_it != baton.m_register_values.end() && "Emulation was successfull but PC wasn't updated"
) ? static_cast<void> (0) : __assert_fail ("pc_it != baton.m_register_values.end() && \"Emulation was successfull but PC wasn't updated\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1025, __PRETTY_FUNCTION__))
1025 "Emulation was successfull but PC wasn't updated")((pc_it != baton.m_register_values.end() && "Emulation was successfull but PC wasn't updated"
) ? static_cast<void> (0) : __assert_fail ("pc_it != baton.m_register_values.end() && \"Emulation was successfull but PC wasn't updated\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1025, __PRETTY_FUNCTION__))
;
1026 next_pc = pc_it->second.GetAsUInt64();
1027
1028 if (flags_it != baton.m_register_values.end())
1029 next_flags = flags_it->second.GetAsUInt64();
1030 else
1031 next_flags = ReadFlags(register_context_sp.get());
1032 } else if (pc_it == baton.m_register_values.end()) {
1033 // Emulate instruction failed and it haven't changed PC. Advance PC
1034 // with the size of the current opcode because the emulation of all
1035 // PC modifying instruction should be successful. The failure most
1036 // likely caused by a not supported instruction which don't modify PC.
1037 next_pc =
1038 register_context_sp->GetPC() + emulator_ap->GetOpcode().GetByteSize();
1039 next_flags = ReadFlags(register_context_sp.get());
1040 } else {
1041 // The instruction emulation failed after it modified the PC. It is an
1042 // unknown error where we can't continue because the next instruction is
1043 // modifying the PC but we don't know how.
1044 return Status("Instruction emulation failed unexpectedly.");
1045 }
1046
1047 if (m_arch.GetMachine() == llvm::Triple::arm) {
1048 if (next_flags & 0x20) {
1049 // Thumb mode
1050 error = SetSoftwareBreakpoint(next_pc, 2);
1051 } else {
1052 // Arm mode
1053 error = SetSoftwareBreakpoint(next_pc, 4);
1054 }
1055 } else if (m_arch.GetMachine() == llvm::Triple::mips64 ||
1056 m_arch.GetMachine() == llvm::Triple::mips64el ||
1057 m_arch.GetMachine() == llvm::Triple::mips ||
1058 m_arch.GetMachine() == llvm::Triple::mipsel ||
1059 m_arch.GetMachine() == llvm::Triple::ppc64le)
1060 error = SetSoftwareBreakpoint(next_pc, 4);
1061 else {
1062 // No size hint is given for the next breakpoint
1063 error = SetSoftwareBreakpoint(next_pc, 0);
1064 }
1065
1066 // If setting the breakpoint fails because next_pc is out of
1067 // the address space, ignore it and let the debugee segfault.
1068 if (error.GetError() == EIO5 || error.GetError() == EFAULT14) {
1069 return Status();
1070 } else if (error.Fail())
1071 return error;
1072
1073 m_threads_stepping_with_breakpoint.insert({thread.GetID(), next_pc});
1074
1075 return Status();
1076}
1077
1078bool NativeProcessLinux::SupportHardwareSingleStepping() const {
1079 if (m_arch.GetMachine() == llvm::Triple::arm ||
1080 m_arch.GetMachine() == llvm::Triple::mips64 ||
1081 m_arch.GetMachine() == llvm::Triple::mips64el ||
1082 m_arch.GetMachine() == llvm::Triple::mips ||
1083 m_arch.GetMachine() == llvm::Triple::mipsel)
1084 return false;
1085 return true;
1086}
1087
1088Status NativeProcessLinux::Resume(const ResumeActionList &resume_actions) {
1089 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1090 LLDB_LOG(log, "pid {0}", GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0}", GetID()); } while (0)
;
1091
1092 bool software_single_step = !SupportHardwareSingleStepping();
1093
1094 if (software_single_step) {
1095 for (const auto &thread : m_threads) {
1096 assert(thread && "thread list should not contain NULL threads")((thread && "thread list should not contain NULL threads"
) ? static_cast<void> (0) : __assert_fail ("thread && \"thread list should not contain NULL threads\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1096, __PRETTY_FUNCTION__))
;
1097
1098 const ResumeAction *const action =
1099 resume_actions.GetActionForThread(thread->GetID(), true);
1100 if (action == nullptr)
1101 continue;
1102
1103 if (action->state == eStateStepping) {
1104 Status error = SetupSoftwareSingleStepping(
1105 static_cast<NativeThreadLinux &>(*thread));
1106 if (error.Fail())
1107 return error;
1108 }
1109 }
1110 }
1111
1112 for (const auto &thread : m_threads) {
1113 assert(thread && "thread list should not contain NULL threads")((thread && "thread list should not contain NULL threads"
) ? static_cast<void> (0) : __assert_fail ("thread && \"thread list should not contain NULL threads\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1113, __PRETTY_FUNCTION__))
;
1114
1115 const ResumeAction *const action =
1116 resume_actions.GetActionForThread(thread->GetID(), true);
1117
1118 if (action == nullptr) {
1119 LLDB_LOG(log, "no action specified for pid {0} tid {1}", GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "no action specified for pid {0} tid {1}", GetID
(), thread->GetID()); } while (0)
1120 thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "no action specified for pid {0} tid {1}", GetID
(), thread->GetID()); } while (0)
;
1121 continue;
1122 }
1123
1124 LLDB_LOG(log, "processing resume action state {0} for pid {1} tid {2}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "processing resume action state {0} for pid {1} tid {2}"
, action->state, GetID(), thread->GetID()); } while (0)
1125 action->state, GetID(), thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "processing resume action state {0} for pid {1} tid {2}"
, action->state, GetID(), thread->GetID()); } while (0)
;
1126
1127 switch (action->state) {
1128 case eStateRunning:
1129 case eStateStepping: {
1130 // Run the thread, possibly feeding it the signal.
1131 const int signo = action->signal;
1132 ResumeThread(static_cast<NativeThreadLinux &>(*thread), action->state,
1133 signo);
1134 break;
1135 }
1136
1137 case eStateSuspended:
1138 case eStateStopped:
1139 llvm_unreachable("Unexpected state")::llvm::llvm_unreachable_internal("Unexpected state", "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1139)
;
1140
1141 default:
1142 return Status("NativeProcessLinux::%s (): unexpected state %s specified "
1143 "for pid %" PRIu64"l" "u" ", tid %" PRIu64"l" "u",
1144 __FUNCTION__, StateAsCString(action->state), GetID(),
1145 thread->GetID());
1146 }
1147 }
1148
1149 return Status();
1150}
1151
1152Status NativeProcessLinux::Halt() {
1153 Status error;
1154
1155 if (kill(GetID(), SIGSTOP19) != 0)
1156 error.SetErrorToErrno();
1157
1158 return error;
1159}
1160
1161Status NativeProcessLinux::Detach() {
1162 Status error;
1163
1164 // Stop monitoring the inferior.
1165 m_sigchld_handle.reset();
1166
1167 // Tell ptrace to detach from the process.
1168 if (GetID() == LLDB_INVALID_PROCESS_ID0)
1169 return error;
1170
1171 for (const auto &thread : m_threads) {
1172 Status e = Detach(thread->GetID());
1173 if (e.Fail())
1174 error =
1175 e; // Save the error, but still attempt to detach from other threads.
1176 }
1177
1178 m_processor_trace_monitor.clear();
1179 m_pt_proces_trace_id = LLDB_INVALID_UID(18446744073709551615UL);
1180
1181 return error;
1182}
1183
1184Status NativeProcessLinux::Signal(int signo) {
1185 Status error;
1186
1187 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1188 LLDB_LOG(log, "sending signal {0} ({1}) to pid {1}", signo,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "sending signal {0} ({1}) to pid {1}", signo,
Host::GetSignalAsCString(signo), GetID()); } while (0)
1189 Host::GetSignalAsCString(signo), GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "sending signal {0} ({1}) to pid {1}", signo,
Host::GetSignalAsCString(signo), GetID()); } while (0)
;
1190
1191 if (kill(GetID(), signo))
1192 error.SetErrorToErrno();
1193
1194 return error;
1195}
1196
1197Status NativeProcessLinux::Interrupt() {
1198 // Pick a running thread (or if none, a not-dead stopped thread) as
1199 // the chosen thread that will be the stop-reason thread.
1200 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1201
1202 NativeThreadProtocol *running_thread = nullptr;
1203 NativeThreadProtocol *stopped_thread = nullptr;
1204
1205 LLDB_LOG(log, "selecting running thread for interrupt target")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "selecting running thread for interrupt target"
); } while (0)
;
1206 for (const auto &thread : m_threads) {
1207 // If we have a running or stepping thread, we'll call that the
1208 // target of the interrupt.
1209 const auto thread_state = thread->GetState();
1210 if (thread_state == eStateRunning || thread_state == eStateStepping) {
1211 running_thread = thread.get();
1212 break;
1213 } else if (!stopped_thread && StateIsStoppedState(thread_state, true)) {
1214 // Remember the first non-dead stopped thread. We'll use that as a backup
1215 // if there are no running threads.
1216 stopped_thread = thread.get();
1217 }
1218 }
1219
1220 if (!running_thread && !stopped_thread) {
1221 Status error("found no running/stepping or live stopped threads as target "
1222 "for interrupt");
1223 LLDB_LOG(log, "skipping due to error: {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "skipping due to error: {0}", error); } while
(0)
;
1224
1225 return error;
1226 }
1227
1228 NativeThreadProtocol *deferred_signal_thread =
1229 running_thread ? running_thread : stopped_thread;
1230
1231 LLDB_LOG(log, "pid {0} {1} tid {2} chosen for interrupt target", GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} {1} tid {2} chosen for interrupt target"
, GetID(), running_thread ? "running" : "stopped", deferred_signal_thread
->GetID()); } while (0)
1232 running_thread ? "running" : "stopped",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} {1} tid {2} chosen for interrupt target"
, GetID(), running_thread ? "running" : "stopped", deferred_signal_thread
->GetID()); } while (0)
1233 deferred_signal_thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} {1} tid {2} chosen for interrupt target"
, GetID(), running_thread ? "running" : "stopped", deferred_signal_thread
->GetID()); } while (0)
;
1234
1235 StopRunningThreads(deferred_signal_thread->GetID());
1236
1237 return Status();
1238}
1239
1240Status NativeProcessLinux::Kill() {
1241 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1242 LLDB_LOG(log, "pid {0}", GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0}", GetID()); } while (0)
;
1243
1244 Status error;
1245
1246 switch (m_state) {
1247 case StateType::eStateInvalid:
1248 case StateType::eStateExited:
1249 case StateType::eStateCrashed:
1250 case StateType::eStateDetached:
1251 case StateType::eStateUnloaded:
1252 // Nothing to do - the process is already dead.
1253 LLDB_LOG(log, "ignored for PID {0} due to current state: {1}", GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "ignored for PID {0} due to current state: {1}"
, GetID(), m_state); } while (0)
1254 m_state)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "ignored for PID {0} due to current state: {1}"
, GetID(), m_state); } while (0)
;
1255 return error;
1256
1257 case StateType::eStateConnected:
1258 case StateType::eStateAttaching:
1259 case StateType::eStateLaunching:
1260 case StateType::eStateStopped:
1261 case StateType::eStateRunning:
1262 case StateType::eStateStepping:
1263 case StateType::eStateSuspended:
1264 // We can try to kill a process in these states.
1265 break;
1266 }
1267
1268 if (kill(GetID(), SIGKILL9) != 0) {
1269 error.SetErrorToErrno();
1270 return error;
1271 }
1272
1273 return error;
1274}
1275
1276static Status
1277ParseMemoryRegionInfoFromProcMapsLine(llvm::StringRef &maps_line,
1278 MemoryRegionInfo &memory_region_info) {
1279 memory_region_info.Clear();
1280
1281 StringExtractor line_extractor(maps_line);
1282
1283 // Format: {address_start_hex}-{address_end_hex} perms offset dev inode
1284 // pathname
1285 // perms: rwxp (letter is present if set, '-' if not, final character is
1286 // p=private, s=shared).
1287
1288 // Parse out the starting address
1289 lldb::addr_t start_address = line_extractor.GetHexMaxU64(false, 0);
1290
1291 // Parse out hyphen separating start and end address from range.
1292 if (!line_extractor.GetBytesLeft() || (line_extractor.GetChar() != '-'))
1293 return Status(
1294 "malformed /proc/{pid}/maps entry, missing dash between address range");
1295
1296 // Parse out the ending address
1297 lldb::addr_t end_address = line_extractor.GetHexMaxU64(false, start_address);
1298
1299 // Parse out the space after the address.
1300 if (!line_extractor.GetBytesLeft() || (line_extractor.GetChar() != ' '))
1301 return Status(
1302 "malformed /proc/{pid}/maps entry, missing space after range");
1303
1304 // Save the range.
1305 memory_region_info.GetRange().SetRangeBase(start_address);
1306 memory_region_info.GetRange().SetRangeEnd(end_address);
1307
1308 // Any memory region in /proc/{pid}/maps is by definition mapped into the
1309 // process.
1310 memory_region_info.SetMapped(MemoryRegionInfo::OptionalBool::eYes);
1311
1312 // Parse out each permission entry.
1313 if (line_extractor.GetBytesLeft() < 4)
1314 return Status("malformed /proc/{pid}/maps entry, missing some portion of "
1315 "permissions");
1316
1317 // Handle read permission.
1318 const char read_perm_char = line_extractor.GetChar();
1319 if (read_perm_char == 'r')
1320 memory_region_info.SetReadable(MemoryRegionInfo::OptionalBool::eYes);
1321 else if (read_perm_char == '-')
1322 memory_region_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
1323 else
1324 return Status("unexpected /proc/{pid}/maps read permission char");
1325
1326 // Handle write permission.
1327 const char write_perm_char = line_extractor.GetChar();
1328 if (write_perm_char == 'w')
1329 memory_region_info.SetWritable(MemoryRegionInfo::OptionalBool::eYes);
1330 else if (write_perm_char == '-')
1331 memory_region_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
1332 else
1333 return Status("unexpected /proc/{pid}/maps write permission char");
1334
1335 // Handle execute permission.
1336 const char exec_perm_char = line_extractor.GetChar();
1337 if (exec_perm_char == 'x')
1338 memory_region_info.SetExecutable(MemoryRegionInfo::OptionalBool::eYes);
1339 else if (exec_perm_char == '-')
1340 memory_region_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
1341 else
1342 return Status("unexpected /proc/{pid}/maps exec permission char");
1343
1344 line_extractor.GetChar(); // Read the private bit
1345 line_extractor.SkipSpaces(); // Skip the separator
1346 line_extractor.GetHexMaxU64(false, 0); // Read the offset
1347 line_extractor.GetHexMaxU64(false, 0); // Read the major device number
1348 line_extractor.GetChar(); // Read the device id separator
1349 line_extractor.GetHexMaxU64(false, 0); // Read the major device number
1350 line_extractor.SkipSpaces(); // Skip the separator
1351 line_extractor.GetU64(0, 10); // Read the inode number
1352
1353 line_extractor.SkipSpaces();
1354 const char *name = line_extractor.Peek();
1355 if (name)
1356 memory_region_info.SetName(name);
1357
1358 return Status();
1359}
1360
1361Status NativeProcessLinux::GetMemoryRegionInfo(lldb::addr_t load_addr,
1362 MemoryRegionInfo &range_info) {
1363 // FIXME review that the final memory region returned extends to the end of
1364 // the virtual address space,
1365 // with no perms if it is not mapped.
1366
1367 // Use an approach that reads memory regions from /proc/{pid}/maps.
1368 // Assume proc maps entries are in ascending order.
1369 // FIXME assert if we find differently.
1370
1371 if (m_supports_mem_region == LazyBool::eLazyBoolNo) {
1372 // We're done.
1373 return Status("unsupported");
1374 }
1375
1376 Status error = PopulateMemoryRegionCache();
1377 if (error.Fail()) {
1378 return error;
1379 }
1380
1381 lldb::addr_t prev_base_address = 0;
1382
1383 // FIXME start by finding the last region that is <= target address using
1384 // binary search. Data is sorted.
1385 // There can be a ton of regions on pthreads apps with lots of threads.
1386 for (auto it = m_mem_region_cache.begin(); it != m_mem_region_cache.end();
1387 ++it) {
1388 MemoryRegionInfo &proc_entry_info = it->first;
1389
1390 // Sanity check assumption that /proc/{pid}/maps entries are ascending.
1391 assert((proc_entry_info.GetRange().GetRangeBase() >= prev_base_address) &&(((proc_entry_info.GetRange().GetRangeBase() >= prev_base_address
) && "descending /proc/pid/maps entries detected, unexpected"
) ? static_cast<void> (0) : __assert_fail ("(proc_entry_info.GetRange().GetRangeBase() >= prev_base_address) && \"descending /proc/pid/maps entries detected, unexpected\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1392, __PRETTY_FUNCTION__))
1392 "descending /proc/pid/maps entries detected, unexpected")(((proc_entry_info.GetRange().GetRangeBase() >= prev_base_address
) && "descending /proc/pid/maps entries detected, unexpected"
) ? static_cast<void> (0) : __assert_fail ("(proc_entry_info.GetRange().GetRangeBase() >= prev_base_address) && \"descending /proc/pid/maps entries detected, unexpected\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1392, __PRETTY_FUNCTION__))
;
1393 prev_base_address = proc_entry_info.GetRange().GetRangeBase();
1394 UNUSED_IF_ASSERT_DISABLED(prev_base_address)((void)(prev_base_address));
1395
1396 // If the target address comes before this entry, indicate distance to next
1397 // region.
1398 if (load_addr < proc_entry_info.GetRange().GetRangeBase()) {
1399 range_info.GetRange().SetRangeBase(load_addr);
1400 range_info.GetRange().SetByteSize(
1401 proc_entry_info.GetRange().GetRangeBase() - load_addr);
1402 range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
1403 range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
1404 range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
1405 range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo);
1406
1407 return error;
1408 } else if (proc_entry_info.GetRange().Contains(load_addr)) {
1409 // The target address is within the memory region we're processing here.
1410 range_info = proc_entry_info;
1411 return error;
1412 }
1413
1414 // The target memory address comes somewhere after the region we just
1415 // parsed.
1416 }
1417
1418 // If we made it here, we didn't find an entry that contained the given
1419 // address. Return the
1420 // load_addr as start and the amount of bytes betwwen load address and the end
1421 // of the memory as
1422 // size.
1423 range_info.GetRange().SetRangeBase(load_addr);
1424 range_info.GetRange().SetRangeEnd(LLDB_INVALID_ADDRESS(18446744073709551615UL));
1425 range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
1426 range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
1427 range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
1428 range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo);
1429 return error;
1430}
1431
1432Status NativeProcessLinux::PopulateMemoryRegionCache() {
1433 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1434
1435 // If our cache is empty, pull the latest. There should always be at least
1436 // one memory region if memory region handling is supported.
1437 if (!m_mem_region_cache.empty()) {
1438 LLDB_LOG(log, "reusing {0} cached memory region entries",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "reusing {0} cached memory region entries", m_mem_region_cache
.size()); } while (0)
1439 m_mem_region_cache.size())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "reusing {0} cached memory region entries", m_mem_region_cache
.size()); } while (0)
;
1440 return Status();
1441 }
1442
1443 auto BufferOrError = getProcFile(GetID(), "maps");
1444 if (!BufferOrError) {
1445 m_supports_mem_region = LazyBool::eLazyBoolNo;
1446 return BufferOrError.getError();
1447 }
1448 StringRef Rest = BufferOrError.get()->getBuffer();
1449 while (! Rest.empty()) {
1450 StringRef Line;
1451 std::tie(Line, Rest) = Rest.split('\n');
1452 MemoryRegionInfo info;
1453 const Status parse_error =
1454 ParseMemoryRegionInfoFromProcMapsLine(Line, info);
1455 if (parse_error.Fail()) {
1456 LLDB_LOG(log, "failed to parse proc maps line '{0}': {1}", Line,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to parse proc maps line '{0}': {1}", Line
, parse_error); } while (0)
1457 parse_error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to parse proc maps line '{0}': {1}", Line
, parse_error); } while (0)
;
1458 m_supports_mem_region = LazyBool::eLazyBoolNo;
1459 return parse_error;
1460 }
1461 m_mem_region_cache.emplace_back(
1462 info, FileSpec(info.GetName().GetCString(), true));
1463 }
1464
1465 if (m_mem_region_cache.empty()) {
1466 // No entries after attempting to read them. This shouldn't happen if
1467 // /proc/{pid}/maps is supported. Assume we don't support map entries
1468 // via procfs.
1469 m_supports_mem_region = LazyBool::eLazyBoolNo;
1470 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to find any procfs maps entries, assuming no support "
"for memory region metadata retrieval"); } while (0)
1471 "failed to find any procfs maps entries, assuming no support "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to find any procfs maps entries, assuming no support "
"for memory region metadata retrieval"); } while (0)
1472 "for memory region metadata retrieval")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to find any procfs maps entries, assuming no support "
"for memory region metadata retrieval"); } while (0)
;
1473 return Status("not supported");
1474 }
1475
1476 LLDB_LOG(log, "read {0} memory region entries from /proc/{1}/maps",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "read {0} memory region entries from /proc/{1}/maps"
, m_mem_region_cache.size(), GetID()); } while (0)
1477 m_mem_region_cache.size(), GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "read {0} memory region entries from /proc/{1}/maps"
, m_mem_region_cache.size(), GetID()); } while (0)
;
1478
1479 // We support memory retrieval, remember that.
1480 m_supports_mem_region = LazyBool::eLazyBoolYes;
1481 return Status();
1482}
1483
1484void NativeProcessLinux::DoStopIDBumped(uint32_t newBumpId) {
1485 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1486 LLDB_LOG(log, "newBumpId={0}", newBumpId)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "newBumpId={0}", newBumpId); } while (0)
;
1487 LLDB_LOG(log, "clearing {0} entries from memory region cache",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "clearing {0} entries from memory region cache"
, m_mem_region_cache.size()); } while (0)
1488 m_mem_region_cache.size())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "clearing {0} entries from memory region cache"
, m_mem_region_cache.size()); } while (0)
;
1489 m_mem_region_cache.clear();
1490}
1491
1492Status NativeProcessLinux::AllocateMemory(size_t size, uint32_t permissions,
1493 lldb::addr_t &addr) {
1494// FIXME implementing this requires the equivalent of
1495// InferiorCallPOSIX::InferiorCallMmap, which depends on
1496// functional ThreadPlans working with Native*Protocol.
1497#if 1
1498 return Status("not implemented yet");
1499#else
1500 addr = LLDB_INVALID_ADDRESS(18446744073709551615UL);
1501
1502 unsigned prot = 0;
1503 if (permissions & lldb::ePermissionsReadable)
1504 prot |= eMmapProtRead;
1505 if (permissions & lldb::ePermissionsWritable)
1506 prot |= eMmapProtWrite;
1507 if (permissions & lldb::ePermissionsExecutable)
1508 prot |= eMmapProtExec;
1509
1510 // TODO implement this directly in NativeProcessLinux
1511 // (and lift to NativeProcessPOSIX if/when that class is
1512 // refactored out).
1513 if (InferiorCallMmap(this, addr, 0, size, prot,
1514 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) {
1515 m_addr_to_mmap_size[addr] = size;
1516 return Status();
1517 } else {
1518 addr = LLDB_INVALID_ADDRESS(18446744073709551615UL);
1519 return Status("unable to allocate %" PRIu64"l" "u"
1520 " bytes of memory with permissions %s",
1521 size, GetPermissionsAsCString(permissions));
1522 }
1523#endif
1524}
1525
1526Status NativeProcessLinux::DeallocateMemory(lldb::addr_t addr) {
1527 // FIXME see comments in AllocateMemory - required lower-level
1528 // bits not in place yet (ThreadPlans)
1529 return Status("not implemented");
1530}
1531
1532lldb::addr_t NativeProcessLinux::GetSharedLibraryInfoAddress() {
1533 // punt on this for now
1534 return LLDB_INVALID_ADDRESS(18446744073709551615UL);
1535}
1536
1537size_t NativeProcessLinux::UpdateThreads() {
1538 // The NativeProcessLinux monitoring threads are always up to date
1539 // with respect to thread state and they keep the thread list
1540 // populated properly. All this method needs to do is return the
1541 // thread count.
1542 return m_threads.size();
1543}
1544
1545bool NativeProcessLinux::GetArchitecture(ArchSpec &arch) const {
1546 arch = m_arch;
1547 return true;
1548}
1549
1550Status NativeProcessLinux::GetSoftwareBreakpointPCOffset(
1551 uint32_t &actual_opcode_size) {
1552 // FIXME put this behind a breakpoint protocol class that can be
1553 // set per architecture. Need ARM, MIPS support here.
1554 static const uint8_t g_i386_opcode[] = {0xCC};
1555 static const uint8_t g_s390x_opcode[] = {0x00, 0x01};
1556 static const uint8_t g_ppc64le_opcode[] = {0x08, 0x00, 0xe0, 0x7f}; // trap
1557
1558 switch (m_arch.GetMachine()) {
1559 case llvm::Triple::x86:
1560 case llvm::Triple::x86_64:
1561 actual_opcode_size = static_cast<uint32_t>(sizeof(g_i386_opcode));
1562 return Status();
1563
1564 case llvm::Triple::systemz:
1565 actual_opcode_size = static_cast<uint32_t>(sizeof(g_s390x_opcode));
1566 return Status();
1567
1568 case llvm::Triple::ppc64le:
1569 actual_opcode_size = static_cast<uint32_t>(sizeof(g_ppc64le_opcode));
1570 return Status();
1571
1572 case llvm::Triple::arm:
1573 case llvm::Triple::aarch64:
1574 case llvm::Triple::mips64:
1575 case llvm::Triple::mips64el:
1576 case llvm::Triple::mips:
1577 case llvm::Triple::mipsel:
1578 // On these architectures the PC don't get updated for breakpoint hits
1579 actual_opcode_size = 0;
1580 return Status();
1581
1582 default:
1583 assert(false && "CPU type not supported!")((false && "CPU type not supported!") ? static_cast<
void> (0) : __assert_fail ("false && \"CPU type not supported!\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1583, __PRETTY_FUNCTION__))
;
1584 return Status("CPU type not supported");
1585 }
1586}
1587
1588Status NativeProcessLinux::SetBreakpoint(lldb::addr_t addr, uint32_t size,
1589 bool hardware) {
1590 if (hardware)
1591 return SetHardwareBreakpoint(addr, size);
1592 else
1593 return SetSoftwareBreakpoint(addr, size);
1594}
1595
1596Status NativeProcessLinux::RemoveBreakpoint(lldb::addr_t addr, bool hardware) {
1597 if (hardware)
1598 return RemoveHardwareBreakpoint(addr);
1599 else
1600 return NativeProcessProtocol::RemoveBreakpoint(addr);
1601}
1602
1603Status NativeProcessLinux::GetSoftwareBreakpointTrapOpcode(
1604 size_t trap_opcode_size_hint, size_t &actual_opcode_size,
1605 const uint8_t *&trap_opcode_bytes) {
1606 // FIXME put this behind a breakpoint protocol class that can be set per
1607 // architecture. Need MIPS support here.
1608 static const uint8_t g_aarch64_opcode[] = {0x00, 0x00, 0x20, 0xd4};
1609 // The ARM reference recommends the use of 0xe7fddefe and 0xdefe but the
1610 // linux kernel does otherwise.
1611 static const uint8_t g_arm_breakpoint_opcode[] = {0xf0, 0x01, 0xf0, 0xe7};
1612 static const uint8_t g_i386_opcode[] = {0xCC};
1613 static const uint8_t g_mips64_opcode[] = {0x00, 0x00, 0x00, 0x0d};
1614 static const uint8_t g_mips64el_opcode[] = {0x0d, 0x00, 0x00, 0x00};
1615 static const uint8_t g_s390x_opcode[] = {0x00, 0x01};
1616 static const uint8_t g_thumb_breakpoint_opcode[] = {0x01, 0xde};
1617 static const uint8_t g_ppc64le_opcode[] = {0x08, 0x00, 0xe0, 0x7f}; // trap
1618
1619 switch (m_arch.GetMachine()) {
1620 case llvm::Triple::aarch64:
1621 trap_opcode_bytes = g_aarch64_opcode;
1622 actual_opcode_size = sizeof(g_aarch64_opcode);
1623 return Status();
1624
1625 case llvm::Triple::arm:
1626 switch (trap_opcode_size_hint) {
1627 case 2:
1628 trap_opcode_bytes = g_thumb_breakpoint_opcode;
1629 actual_opcode_size = sizeof(g_thumb_breakpoint_opcode);
1630 return Status();
1631 case 4:
1632 trap_opcode_bytes = g_arm_breakpoint_opcode;
1633 actual_opcode_size = sizeof(g_arm_breakpoint_opcode);
1634 return Status();
1635 default:
1636 assert(false && "Unrecognised trap opcode size hint!")((false && "Unrecognised trap opcode size hint!") ? static_cast
<void> (0) : __assert_fail ("false && \"Unrecognised trap opcode size hint!\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1636, __PRETTY_FUNCTION__))
;
1637 return Status("Unrecognised trap opcode size hint!");
1638 }
1639
1640 case llvm::Triple::x86:
1641 case llvm::Triple::x86_64:
1642 trap_opcode_bytes = g_i386_opcode;
1643 actual_opcode_size = sizeof(g_i386_opcode);
1644 return Status();
1645
1646 case llvm::Triple::mips:
1647 case llvm::Triple::mips64:
1648 trap_opcode_bytes = g_mips64_opcode;
1649 actual_opcode_size = sizeof(g_mips64_opcode);
1650 return Status();
1651
1652 case llvm::Triple::mipsel:
1653 case llvm::Triple::mips64el:
1654 trap_opcode_bytes = g_mips64el_opcode;
1655 actual_opcode_size = sizeof(g_mips64el_opcode);
1656 return Status();
1657
1658 case llvm::Triple::systemz:
1659 trap_opcode_bytes = g_s390x_opcode;
1660 actual_opcode_size = sizeof(g_s390x_opcode);
1661 return Status();
1662
1663 case llvm::Triple::ppc64le:
1664 trap_opcode_bytes = g_ppc64le_opcode;
1665 actual_opcode_size = sizeof(g_ppc64le_opcode);
1666 return Status();
1667
1668 default:
1669 assert(false && "CPU type not supported!")((false && "CPU type not supported!") ? static_cast<
void> (0) : __assert_fail ("false && \"CPU type not supported!\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1669, __PRETTY_FUNCTION__))
;
1670 return Status("CPU type not supported");
1671 }
1672}
1673
1674#if 0
1675ProcessMessage::CrashReason
1676NativeProcessLinux::GetCrashReasonForSIGSEGV(const siginfo_t *info)
1677{
1678 ProcessMessage::CrashReason reason;
1679 assert(info->si_signo == SIGSEGV)((info->si_signo == 11) ? static_cast<void> (0) : __assert_fail
("info->si_signo == SIGSEGV", "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1679, __PRETTY_FUNCTION__))
;
1680
1681 reason = ProcessMessage::eInvalidCrashReason;
1682
1683 switch (info->si_code)
1684 {
1685 default:
1686 assert(false && "unexpected si_code for SIGSEGV")((false && "unexpected si_code for SIGSEGV") ? static_cast
<void> (0) : __assert_fail ("false && \"unexpected si_code for SIGSEGV\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1686, __PRETTY_FUNCTION__))
;
1687 break;
1688 case SI_KERNELSI_KERNEL:
1689 // Linux will occasionally send spurious SI_KERNEL codes.
1690 // (this is poorly documented in sigaction)
1691 // One way to get this is via unaligned SIMD loads.
1692 reason = ProcessMessage::eInvalidAddress; // for lack of anything better
1693 break;
1694 case SEGV_MAPERRSEGV_MAPERR:
1695 reason = ProcessMessage::eInvalidAddress;
1696 break;
1697 case SEGV_ACCERRSEGV_ACCERR:
1698 reason = ProcessMessage::ePrivilegedAddress;
1699 break;
1700 }
1701
1702 return reason;
1703}
1704#endif
1705
1706#if 0
1707ProcessMessage::CrashReason
1708NativeProcessLinux::GetCrashReasonForSIGILL(const siginfo_t *info)
1709{
1710 ProcessMessage::CrashReason reason;
1711 assert(info->si_signo == SIGILL)((info->si_signo == 4) ? static_cast<void> (0) : __assert_fail
("info->si_signo == SIGILL", "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1711, __PRETTY_FUNCTION__))
;
1712
1713 reason = ProcessMessage::eInvalidCrashReason;
1714
1715 switch (info->si_code)
1716 {
1717 default:
1718 assert(false && "unexpected si_code for SIGILL")((false && "unexpected si_code for SIGILL") ? static_cast
<void> (0) : __assert_fail ("false && \"unexpected si_code for SIGILL\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1718, __PRETTY_FUNCTION__))
;
1719 break;
1720 case ILL_ILLOPCILL_ILLOPC:
1721 reason = ProcessMessage::eIllegalOpcode;
1722 break;
1723 case ILL_ILLOPNILL_ILLOPN:
1724 reason = ProcessMessage::eIllegalOperand;
1725 break;
1726 case ILL_ILLADRILL_ILLADR:
1727 reason = ProcessMessage::eIllegalAddressingMode;
1728 break;
1729 case ILL_ILLTRPILL_ILLTRP:
1730 reason = ProcessMessage::eIllegalTrap;
1731 break;
1732 case ILL_PRVOPCILL_PRVOPC:
1733 reason = ProcessMessage::ePrivilegedOpcode;
1734 break;
1735 case ILL_PRVREGILL_PRVREG:
1736 reason = ProcessMessage::ePrivilegedRegister;
1737 break;
1738 case ILL_COPROCILL_COPROC:
1739 reason = ProcessMessage::eCoprocessorError;
1740 break;
1741 case ILL_BADSTKILL_BADSTK:
1742 reason = ProcessMessage::eInternalStackError;
1743 break;
1744 }
1745
1746 return reason;
1747}
1748#endif
1749
1750#if 0
1751ProcessMessage::CrashReason
1752NativeProcessLinux::GetCrashReasonForSIGFPE(const siginfo_t *info)
1753{
1754 ProcessMessage::CrashReason reason;
1755 assert(info->si_signo == SIGFPE)((info->si_signo == 8) ? static_cast<void> (0) : __assert_fail
("info->si_signo == SIGFPE", "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1755, __PRETTY_FUNCTION__))
;
1756
1757 reason = ProcessMessage::eInvalidCrashReason;
1758
1759 switch (info->si_code)
1760 {
1761 default:
1762 assert(false && "unexpected si_code for SIGFPE")((false && "unexpected si_code for SIGFPE") ? static_cast
<void> (0) : __assert_fail ("false && \"unexpected si_code for SIGFPE\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1762, __PRETTY_FUNCTION__))
;
1763 break;
1764 case FPE_INTDIVFPE_INTDIV:
1765 reason = ProcessMessage::eIntegerDivideByZero;
1766 break;
1767 case FPE_INTOVFFPE_INTOVF:
1768 reason = ProcessMessage::eIntegerOverflow;
1769 break;
1770 case FPE_FLTDIVFPE_FLTDIV:
1771 reason = ProcessMessage::eFloatDivideByZero;
1772 break;
1773 case FPE_FLTOVFFPE_FLTOVF:
1774 reason = ProcessMessage::eFloatOverflow;
1775 break;
1776 case FPE_FLTUNDFPE_FLTUND:
1777 reason = ProcessMessage::eFloatUnderflow;
1778 break;
1779 case FPE_FLTRESFPE_FLTRES:
1780 reason = ProcessMessage::eFloatInexactResult;
1781 break;
1782 case FPE_FLTINVFPE_FLTINV:
1783 reason = ProcessMessage::eFloatInvalidOperation;
1784 break;
1785 case FPE_FLTSUBFPE_FLTSUB:
1786 reason = ProcessMessage::eFloatSubscriptRange;
1787 break;
1788 }
1789
1790 return reason;
1791}
1792#endif
1793
1794#if 0
1795ProcessMessage::CrashReason
1796NativeProcessLinux::GetCrashReasonForSIGBUS(const siginfo_t *info)
1797{
1798 ProcessMessage::CrashReason reason;
1799 assert(info->si_signo == SIGBUS)((info->si_signo == 7) ? static_cast<void> (0) : __assert_fail
("info->si_signo == SIGBUS", "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1799, __PRETTY_FUNCTION__))
;
1800
1801 reason = ProcessMessage::eInvalidCrashReason;
1802
1803 switch (info->si_code)
1804 {
1805 default:
1806 assert(false && "unexpected si_code for SIGBUS")((false && "unexpected si_code for SIGBUS") ? static_cast
<void> (0) : __assert_fail ("false && \"unexpected si_code for SIGBUS\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1806, __PRETTY_FUNCTION__))
;
1807 break;
1808 case BUS_ADRALNBUS_ADRALN:
1809 reason = ProcessMessage::eIllegalAlignment;
1810 break;
1811 case BUS_ADRERRBUS_ADRERR:
1812 reason = ProcessMessage::eIllegalAddress;
1813 break;
1814 case BUS_OBJERRBUS_OBJERR:
1815 reason = ProcessMessage::eHardwareError;
1816 break;
1817 }
1818
1819 return reason;
1820}
1821#endif
1822
1823Status NativeProcessLinux::ReadMemory(lldb::addr_t addr, void *buf, size_t size,
1824 size_t &bytes_read) {
1825 if (ProcessVmReadvSupported()) {
1826 // The process_vm_readv path is about 50 times faster than ptrace api. We
1827 // want to use
1828 // this syscall if it is supported.
1829
1830 const ::pid_t pid = GetID();
1831
1832 struct iovec local_iov, remote_iov;
1833 local_iov.iov_base = buf;
1834 local_iov.iov_len = size;
1835 remote_iov.iov_base = reinterpret_cast<void *>(addr);
1836 remote_iov.iov_len = size;
1837
1838 bytes_read = process_vm_readv(pid, &local_iov, 1, &remote_iov, 1, 0);
1839 const bool success = bytes_read == size;
1840
1841 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1842 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "using process_vm_readv to read {0} bytes from inferior "
"address {1:x}: {2}", size, addr, success ? "Success" : llvm
::sys::StrError((*__errno_location ()))); } while (0)
1843 "using process_vm_readv to read {0} bytes from inferior "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "using process_vm_readv to read {0} bytes from inferior "
"address {1:x}: {2}", size, addr, success ? "Success" : llvm
::sys::StrError((*__errno_location ()))); } while (0)
1844 "address {1:x}: {2}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "using process_vm_readv to read {0} bytes from inferior "
"address {1:x}: {2}", size, addr, success ? "Success" : llvm
::sys::StrError((*__errno_location ()))); } while (0)
1845 size, addr, success ? "Success" : llvm::sys::StrError(errno))do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "using process_vm_readv to read {0} bytes from inferior "
"address {1:x}: {2}", size, addr, success ? "Success" : llvm
::sys::StrError((*__errno_location ()))); } while (0)
;
1846
1847 if (success)
1848 return Status();
1849 // else the call failed for some reason, let's retry the read using ptrace
1850 // api.
1851 }
1852
1853 unsigned char *dst = static_cast<unsigned char *>(buf);
1854 size_t remainder;
1855 long data;
1856
1857 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY(1u << 4)));
1858 LLDB_LOG(log, "addr = {0}, buf = {1}, size = {2}", addr, buf, size)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "addr = {0}, buf = {1}, size = {2}", addr, buf
, size); } while (0)
;
1859
1860 for (bytes_read = 0; bytes_read < size; bytes_read += remainder) {
1861 Status error = NativeProcessLinux::PtraceWrapper(
1862 PTRACE_PEEKDATA, GetID(), (void *)addr, nullptr, 0, &data);
1863 if (error.Fail())
1864 return error;
1865
1866 remainder = size - bytes_read;
1867 remainder = remainder > k_ptrace_word_size ? k_ptrace_word_size : remainder;
1868
1869 // Copy the data into our buffer
1870 memcpy(dst, &data, remainder);
1871
1872 LLDB_LOG(log, "[{0:x}]:{1:x}", addr, data)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "[{0:x}]:{1:x}", addr, data); } while (0)
;
1873 addr += k_ptrace_word_size;
1874 dst += k_ptrace_word_size;
1875 }
1876 return Status();
1877}
1878
1879Status NativeProcessLinux::ReadMemoryWithoutTrap(lldb::addr_t addr, void *buf,
1880 size_t size,
1881 size_t &bytes_read) {
1882 Status error = ReadMemory(addr, buf, size, bytes_read);
1883 if (error.Fail())
1884 return error;
1885 return m_breakpoint_list.RemoveTrapsFromBuffer(addr, buf, size);
1886}
1887
1888Status NativeProcessLinux::WriteMemory(lldb::addr_t addr, const void *buf,
1889 size_t size, size_t &bytes_written) {
1890 const unsigned char *src = static_cast<const unsigned char *>(buf);
1891 size_t remainder;
1892 Status error;
1893
1894 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY(1u << 4)));
1895 LLDB_LOG(log, "addr = {0}, buf = {1}, size = {2}", addr, buf, size)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "addr = {0}, buf = {1}, size = {2}", addr, buf
, size); } while (0)
;
1896
1897 for (bytes_written = 0; bytes_written < size; bytes_written += remainder) {
1898 remainder = size - bytes_written;
1899 remainder = remainder > k_ptrace_word_size ? k_ptrace_word_size : remainder;
1900
1901 if (remainder == k_ptrace_word_size) {
1902 unsigned long data = 0;
1903 memcpy(&data, src, k_ptrace_word_size);
1904
1905 LLDB_LOG(log, "[{0:x}]:{1:x}", addr, data)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "[{0:x}]:{1:x}", addr, data); } while (0)
;
1906 error = NativeProcessLinux::PtraceWrapper(PTRACE_POKEDATA, GetID(),
1907 (void *)addr, (void *)data);
1908 if (error.Fail())
1909 return error;
1910 } else {
1911 unsigned char buff[8];
1912 size_t bytes_read;
1913 error = ReadMemory(addr, buff, k_ptrace_word_size, bytes_read);
1914 if (error.Fail())
1915 return error;
1916
1917 memcpy(buff, src, remainder);
1918
1919 size_t bytes_written_rec;
1920 error = WriteMemory(addr, buff, k_ptrace_word_size, bytes_written_rec);
1921 if (error.Fail())
1922 return error;
1923
1924 LLDB_LOG(log, "[{0:x}]:{1:x} ({2:x})", addr, *(const unsigned long *)src,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "[{0:x}]:{1:x} ({2:x})", addr, *(const unsigned
long *)src, *(unsigned long *)buff); } while (0)
1925 *(unsigned long *)buff)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "[{0:x}]:{1:x} ({2:x})", addr, *(const unsigned
long *)src, *(unsigned long *)buff); } while (0)
;
1926 }
1927
1928 addr += k_ptrace_word_size;
1929 src += k_ptrace_word_size;
1930 }
1931 return error;
1932}
1933
1934Status NativeProcessLinux::GetSignalInfo(lldb::tid_t tid, void *siginfo) {
1935 return PtraceWrapper(PTRACE_GETSIGINFO, tid, nullptr, siginfo);
29
Passing null pointer value via 3rd parameter 'addr'
30
Calling 'NativeProcessLinux::PtraceWrapper'
1936}
1937
1938Status NativeProcessLinux::GetEventMessage(lldb::tid_t tid,
1939 unsigned long *message) {
1940 return PtraceWrapper(PTRACE_GETEVENTMSG, tid, nullptr, message);
1941}
1942
1943Status NativeProcessLinux::Detach(lldb::tid_t tid) {
1944 if (tid == LLDB_INVALID_THREAD_ID0)
1945 return Status();
1946
1947 return PtraceWrapper(PTRACE_DETACH, tid);
1948}
1949
1950bool NativeProcessLinux::HasThreadNoLock(lldb::tid_t thread_id) {
1951 for (const auto &thread : m_threads) {
1952 assert(thread && "thread list should not contain NULL threads")((thread && "thread list should not contain NULL threads"
) ? static_cast<void> (0) : __assert_fail ("thread && \"thread list should not contain NULL threads\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1952, __PRETTY_FUNCTION__))
;
1953 if (thread->GetID() == thread_id) {
1954 // We have this thread.
1955 return true;
1956 }
1957 }
1958
1959 // We don't have this thread.
1960 return false;
1961}
1962
1963bool NativeProcessLinux::StopTrackingThread(lldb::tid_t thread_id) {
1964 Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2));
1965 LLDB_LOG(log, "tid: {0})", thread_id)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid: {0})", thread_id); } while (0)
;
1966
1967 bool found = false;
1968 for (auto it = m_threads.begin(); it != m_threads.end(); ++it) {
1969 if (*it && ((*it)->GetID() == thread_id)) {
1970 m_threads.erase(it);
1971 found = true;
1972 break;
1973 }
1974 }
1975
1976 if (found)
1977 StopTracingForThread(thread_id);
1978 SignalIfAllThreadsStopped();
1979 return found;
1980}
1981
1982NativeThreadLinux &NativeProcessLinux::AddThread(lldb::tid_t thread_id) {
1983 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2)));
1984 LLDB_LOG(log, "pid {0} adding thread with tid {1}", GetID(), thread_id)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} adding thread with tid {1}", GetID()
, thread_id); } while (0)
;
1985
1986 assert(!HasThreadNoLock(thread_id) &&((!HasThreadNoLock(thread_id) && "attempted to add a thread by id that already exists"
) ? static_cast<void> (0) : __assert_fail ("!HasThreadNoLock(thread_id) && \"attempted to add a thread by id that already exists\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1987, __PRETTY_FUNCTION__))
1987 "attempted to add a thread by id that already exists")((!HasThreadNoLock(thread_id) && "attempted to add a thread by id that already exists"
) ? static_cast<void> (0) : __assert_fail ("!HasThreadNoLock(thread_id) && \"attempted to add a thread by id that already exists\""
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1987, __PRETTY_FUNCTION__))
;
1988
1989 // If this is the first thread, save it as the current thread
1990 if (m_threads.empty())
1991 SetCurrentThreadID(thread_id);
1992
1993 m_threads.push_back(llvm::make_unique<NativeThreadLinux>(*this, thread_id));
1994
1995 if (m_pt_proces_trace_id != LLDB_INVALID_UID(18446744073709551615UL)) {
1996 auto traceMonitor = ProcessorTraceMonitor::Create(
1997 GetID(), thread_id, m_pt_process_trace_config, true);
1998 if (traceMonitor) {
1999 m_pt_traced_thread_group.insert(thread_id);
2000 m_processor_trace_monitor.insert(
2001 std::make_pair(thread_id, std::move(*traceMonitor)));
2002 } else {
2003 LLDB_LOG(log, "failed to start trace on thread {0}", thread_id)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to start trace on thread {0}", thread_id
); } while (0)
;
2004 Status error(traceMonitor.takeError());
2005 LLDB_LOG(log, "error {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "error {0}", error); } while (0)
;
2006 }
2007 }
2008
2009 return static_cast<NativeThreadLinux &>(*m_threads.back());
2010}
2011
2012Status
2013NativeProcessLinux::FixupBreakpointPCAsNeeded(NativeThreadLinux &thread) {
2014 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_BREAKPOINTS(1u << 7)));
2015
2016 Status error;
2017
2018 // Find out the size of a breakpoint (might depend on where we are in the
2019 // code).
2020 NativeRegisterContextSP context_sp = thread.GetRegisterContext();
2021 if (!context_sp) {
2022 error.SetErrorString("cannot get a NativeRegisterContext for the thread");
2023 LLDB_LOG(log, "failed: {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed: {0}", error); } while (0)
;
2024 return error;
2025 }
2026
2027 uint32_t breakpoint_size = 0;
2028 error = GetSoftwareBreakpointPCOffset(breakpoint_size);
2029 if (error.Fail()) {
2030 LLDB_LOG(log, "GetBreakpointSize() failed: {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "GetBreakpointSize() failed: {0}", error); } while
(0)
;
2031 return error;
2032 } else
2033 LLDB_LOG(log, "breakpoint size: {0}", breakpoint_size)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "breakpoint size: {0}", breakpoint_size); } while
(0)
;
2034
2035 // First try probing for a breakpoint at a software breakpoint location: PC -
2036 // breakpoint size.
2037 const lldb::addr_t initial_pc_addr =
2038 context_sp->GetPCfromBreakpointLocation();
2039 lldb::addr_t breakpoint_addr = initial_pc_addr;
2040 if (breakpoint_size > 0) {
2041 // Do not allow breakpoint probe to wrap around.
2042 if (breakpoint_addr >= breakpoint_size)
2043 breakpoint_addr -= breakpoint_size;
2044 }
2045
2046 // Check if we stopped because of a breakpoint.
2047 NativeBreakpointSP breakpoint_sp;
2048 error = m_breakpoint_list.GetBreakpoint(breakpoint_addr, breakpoint_sp);
2049 if (!error.Success() || !breakpoint_sp) {
2050 // We didn't find one at a software probe location. Nothing to do.
2051 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} no lldb breakpoint found at current pc with "
"adjustment: {1}", GetID(), breakpoint_addr); } while (0)
2052 "pid {0} no lldb breakpoint found at current pc with "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} no lldb breakpoint found at current pc with "
"adjustment: {1}", GetID(), breakpoint_addr); } while (0)
2053 "adjustment: {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} no lldb breakpoint found at current pc with "
"adjustment: {1}", GetID(), breakpoint_addr); } while (0)
2054 GetID(), breakpoint_addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} no lldb breakpoint found at current pc with "
"adjustment: {1}", GetID(), breakpoint_addr); } while (0)
;
2055 return Status();
2056 }
2057
2058 // If the breakpoint is not a software breakpoint, nothing to do.
2059 if (!breakpoint_sp->IsSoftwareBreakpoint()) {
2060 LLDB_LOG(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} breakpoint found at {1:x}, not software, nothing to adjust"
, GetID(), breakpoint_addr); } while (0)
2061 log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} breakpoint found at {1:x}, not software, nothing to adjust"
, GetID(), breakpoint_addr); } while (0)
2062 "pid {0} breakpoint found at {1:x}, not software, nothing to adjust",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} breakpoint found at {1:x}, not software, nothing to adjust"
, GetID(), breakpoint_addr); } while (0)
2063 GetID(), breakpoint_addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} breakpoint found at {1:x}, not software, nothing to adjust"
, GetID(), breakpoint_addr); } while (0)
;
2064 return Status();
2065 }
2066
2067 //
2068 // We have a software breakpoint and need to adjust the PC.
2069 //
2070
2071 // Sanity check.
2072 if (breakpoint_size == 0) {
2073 // Nothing to do! How did we get here?
2074 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} breakpoint found at {1:x}, it is software, but the "
"size is zero, nothing to do (unexpected)", GetID(), breakpoint_addr
); } while (0)
2075 "pid {0} breakpoint found at {1:x}, it is software, but the "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} breakpoint found at {1:x}, it is software, but the "
"size is zero, nothing to do (unexpected)", GetID(), breakpoint_addr
); } while (0)
2076 "size is zero, nothing to do (unexpected)",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} breakpoint found at {1:x}, it is software, but the "
"size is zero, nothing to do (unexpected)", GetID(), breakpoint_addr
); } while (0)
2077 GetID(), breakpoint_addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} breakpoint found at {1:x}, it is software, but the "
"size is zero, nothing to do (unexpected)", GetID(), breakpoint_addr
); } while (0)
;
2078 return Status();
2079 }
2080
2081 // Change the program counter.
2082 LLDB_LOG(log, "pid {0} tid {1}: changing PC from {2:x} to {3:x}", GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}: changing PC from {2:x} to {3:x}"
, GetID(), thread.GetID(), initial_pc_addr, breakpoint_addr);
} while (0)
2083 thread.GetID(), initial_pc_addr, breakpoint_addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}: changing PC from {2:x} to {3:x}"
, GetID(), thread.GetID(), initial_pc_addr, breakpoint_addr);
} while (0)
;
2084
2085 error = context_sp->SetPC(breakpoint_addr);
2086 if (error.Fail()) {
2087 LLDB_LOG(log, "pid {0} tid {1}: failed to set PC: {2}", GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}: failed to set PC: {2}", GetID
(), thread.GetID(), error); } while (0)
2088 thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}: failed to set PC: {2}", GetID
(), thread.GetID(), error); } while (0)
;
2089 return error;
2090 }
2091
2092 return error;
2093}
2094
2095Status NativeProcessLinux::GetLoadedModuleFileSpec(const char *module_path,
2096 FileSpec &file_spec) {
2097 Status error = PopulateMemoryRegionCache();
2098 if (error.Fail())
2099 return error;
2100
2101 FileSpec module_file_spec(module_path, true);
2102
2103 file_spec.Clear();
2104 for (const auto &it : m_mem_region_cache) {
2105 if (it.second.GetFilename() == module_file_spec.GetFilename()) {
2106 file_spec = it.second;
2107 return Status();
2108 }
2109 }
2110 return Status("Module file (%s) not found in /proc/%" PRIu64"l" "u" "/maps file!",
2111 module_file_spec.GetFilename().AsCString(), GetID());
2112}
2113
2114Status NativeProcessLinux::GetFileLoadAddress(const llvm::StringRef &file_name,
2115 lldb::addr_t &load_addr) {
2116 load_addr = LLDB_INVALID_ADDRESS(18446744073709551615UL);
2117 Status error = PopulateMemoryRegionCache();
2118 if (error.Fail())
2119 return error;
2120
2121 FileSpec file(file_name, false);
2122 for (const auto &it : m_mem_region_cache) {
2123 if (it.second == file) {
2124 load_addr = it.first.GetRange().GetRangeBase();
2125 return Status();
2126 }
2127 }
2128 return Status("No load address found for specified file.");
2129}
2130
2131NativeThreadLinux *NativeProcessLinux::GetThreadByID(lldb::tid_t tid) {
2132 return static_cast<NativeThreadLinux *>(
2133 NativeProcessProtocol::GetThreadByID(tid));
2134}
2135
2136Status NativeProcessLinux::ResumeThread(NativeThreadLinux &thread,
2137 lldb::StateType state, int signo) {
2138 Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2));
2139 LLDB_LOG(log, "tid: {0}", thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid: {0}", thread.GetID()); } while (0)
;
2140
2141 // Before we do the resume below, first check if we have a pending
2142 // stop notification that is currently waiting for
2143 // all threads to stop. This is potentially a buggy situation since
2144 // we're ostensibly waiting for threads to stop before we send out the
2145 // pending notification, and here we are resuming one before we send
2146 // out the pending stop notification.
2147 if (m_pending_notification_tid != LLDB_INVALID_THREAD_ID0) {
2148 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to resume tid {0} per explicit request but we have a "
"pending stop notification (tid {1}) that is actively " "waiting for this thread to stop. Valid sequence of events?"
, thread.GetID(), m_pending_notification_tid); } while (0)
2149 "about to resume tid {0} per explicit request but we have a "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to resume tid {0} per explicit request but we have a "
"pending stop notification (tid {1}) that is actively " "waiting for this thread to stop. Valid sequence of events?"
, thread.GetID(), m_pending_notification_tid); } while (0)
2150 "pending stop notification (tid {1}) that is actively "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to resume tid {0} per explicit request but we have a "
"pending stop notification (tid {1}) that is actively " "waiting for this thread to stop. Valid sequence of events?"
, thread.GetID(), m_pending_notification_tid); } while (0)
2151 "waiting for this thread to stop. Valid sequence of events?",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to resume tid {0} per explicit request but we have a "
"pending stop notification (tid {1}) that is actively " "waiting for this thread to stop. Valid sequence of events?"
, thread.GetID(), m_pending_notification_tid); } while (0)
2152 thread.GetID(), m_pending_notification_tid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to resume tid {0} per explicit request but we have a "
"pending stop notification (tid {1}) that is actively " "waiting for this thread to stop. Valid sequence of events?"
, thread.GetID(), m_pending_notification_tid); } while (0)
;
2153 }
2154
2155 // Request a resume. We expect this to be synchronous and the system
2156 // to reflect it is running after this completes.
2157 switch (state) {
2158 case eStateRunning: {
2159 const auto resume_result = thread.Resume(signo);
2160 if (resume_result.Success())
2161 SetState(eStateRunning, true);
2162 return resume_result;
2163 }
2164 case eStateStepping: {
2165 const auto step_result = thread.SingleStep(signo);
2166 if (step_result.Success())
2167 SetState(eStateRunning, true);
2168 return step_result;
2169 }
2170 default:
2171 LLDB_LOG(log, "Unhandled state {0}.", state)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Unhandled state {0}.", state); } while (0)
;
2172 llvm_unreachable("Unhandled state for resume")::llvm::llvm_unreachable_internal("Unhandled state for resume"
, "/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 2172)
;
2173 }
2174}
2175
2176//===----------------------------------------------------------------------===//
2177
2178void NativeProcessLinux::StopRunningThreads(const lldb::tid_t triggering_tid) {
2179 Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2));
2180 LLDB_LOG(log, "about to process event: (triggering_tid: {0})",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to process event: (triggering_tid: {0})"
, triggering_tid); } while (0)
2181 triggering_tid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to process event: (triggering_tid: {0})"
, triggering_tid); } while (0)
;
2182
2183 m_pending_notification_tid = triggering_tid;
2184
2185 // Request a stop for all the thread stops that need to be stopped
2186 // and are not already known to be stopped.
2187 for (const auto &thread : m_threads) {
2188 if (StateIsRunningState(thread->GetState()))
2189 static_cast<NativeThreadLinux *>(thread.get())->RequestStop();
2190 }
2191
2192 SignalIfAllThreadsStopped();
2193 LLDB_LOG(log, "event processing done")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "event processing done"); } while (0)
;
2194}
2195
2196void NativeProcessLinux::SignalIfAllThreadsStopped() {
2197 if (m_pending_notification_tid == LLDB_INVALID_THREAD_ID0)
2198 return; // No pending notification. Nothing to do.
2199
2200 for (const auto &thread_sp : m_threads) {
2201 if (StateIsRunningState(thread_sp->GetState()))
2202 return; // Some threads are still running. Don't signal yet.
2203 }
2204
2205 // We have a pending notification and all threads have stopped.
2206 Log *log(
2207 GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1) | LIBLLDB_LOG_BREAKPOINTS(1u << 5)));
2208
2209 // Clear any temporary breakpoints we used to implement software single
2210 // stepping.
2211 for (const auto &thread_info : m_threads_stepping_with_breakpoint) {
2212 Status error = RemoveBreakpoint(thread_info.second);
2213 if (error.Fail())
2214 LLDB_LOG(log, "pid = {0} remove stepping breakpoint: {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0} remove stepping breakpoint: {1}", thread_info
.first, error); } while (0)
2215 thread_info.first, error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0} remove stepping breakpoint: {1}", thread_info
.first, error); } while (0)
;
2216 }
2217 m_threads_stepping_with_breakpoint.clear();
2218
2219 // Notify the delegate about the stop
2220 SetCurrentThreadID(m_pending_notification_tid);
2221 SetState(StateType::eStateStopped, true);
2222 m_pending_notification_tid = LLDB_INVALID_THREAD_ID0;
2223}
2224
2225void NativeProcessLinux::ThreadWasCreated(NativeThreadLinux &thread) {
2226 Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2));
2227 LLDB_LOG(log, "tid: {0}", thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid: {0}", thread.GetID()); } while (0)
;
2228
2229 if (m_pending_notification_tid != LLDB_INVALID_THREAD_ID0 &&
2230 StateIsRunningState(thread.GetState())) {
2231 // We will need to wait for this new thread to stop as well before firing
2232 // the
2233 // notification.
2234 thread.RequestStop();
2235 }
2236}
2237
2238void NativeProcessLinux::SigchldHandler() {
2239 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
2240 // Process all pending waitpid notifications.
2241 while (true) {
2
Loop condition is true. Entering loop body
8
Loop condition is true. Entering loop body
14
Loop condition is true. Entering loop body
20
Loop condition is true. Entering loop body
2242 int status = -1;
2243 ::pid_t wait_pid = llvm::sys::RetryAfterSignal(-1, ::waitpid, -1, &status,
2244 __WALL0x40000000 | __WNOTHREAD0x20000000 | WNOHANG1);
2245
2246 if (wait_pid == 0)
3
Assuming 'wait_pid' is not equal to 0
4
Taking false branch
9
Assuming 'wait_pid' is not equal to 0
10
Taking false branch
15
Assuming 'wait_pid' is not equal to 0
16
Taking false branch
21
Assuming 'wait_pid' is not equal to 0
22
Taking false branch
2247 break; // We are done.
2248
2249 if (wait_pid == -1) {
5
Taking false branch
11
Taking false branch
17
Taking false branch
23
Taking false branch
2250 Status error(errno(*__errno_location ()), eErrorTypePOSIX);
2251 LLDB_LOG(log, "waitpid (-1, &status, _) failed: {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waitpid (-1, &status, _) failed: {0}", error
); } while (0)
;
2252 break;
2253 }
2254
2255 WaitStatus wait_status = WaitStatus::Decode(status);
2256 bool exited = wait_status.type == WaitStatus::Exit ||
6
Assuming the condition is false
12
Assuming the condition is false
18
Assuming the condition is false
24
Assuming the condition is false
2257 (wait_status.type == WaitStatus::Signal &&
7
Assuming the condition is false
13
Assuming the condition is false
19
Assuming the condition is false
25
Assuming the condition is false
2258 wait_pid == static_cast<::pid_t>(GetID()));
2259
2260 LLDB_LOG(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}"
, wait_pid, wait_status, exited); } while (0)
2261 log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}"
, wait_pid, wait_status, exited); } while (0)
2262 "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}"
, wait_pid, wait_status, exited); } while (0)
2263 wait_pid, wait_status, exited)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}"
, wait_pid, wait_status, exited); } while (0)
;
2264
2265 MonitorCallback(wait_pid, exited, wait_status);
26
Calling 'NativeProcessLinux::MonitorCallback'
2266 }
2267}
2268
2269// Wrapper for ptrace to catch errors and log calls.
2270// Note that ptrace sets errno on error because -1 can be a valid result (i.e.
2271// for PTRACE_PEEK*)
2272Status NativeProcessLinux::PtraceWrapper(int req, lldb::pid_t pid, void *addr,
2273 void *data, size_t data_size,
2274 long *result) {
2275 Status error;
2276 long int ret;
2277
2278 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2279
2280 PtraceDisplayBytes(req, data, data_size);
2281
2282 errno(*__errno_location ()) = 0;
2283 if (req == PTRACE_GETREGSETPTRACE_GETREGSET || req == PTRACE_SETREGSETPTRACE_SETREGSET)
31
Assuming 'req' is equal to PTRACE_GETREGSET
2284 ret = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid),
2285 *(unsigned int *)addr, data);
32
Dereference of null pointer
2286 else
2287 ret = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid),
2288 addr, data);
2289
2290 if (ret == -1)
2291 error.SetErrorToErrno();
2292
2293 if (result)
2294 *result = ret;
2295
2296 LLDB_LOG(log, "ptrace({0}, {1}, {2}, {3}, {4})={5:x}", req, pid, addr, data,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "ptrace({0}, {1}, {2}, {3}, {4})={5:x}", req,
pid, addr, data, data_size, ret); } while (0)
2297 data_size, ret)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "ptrace({0}, {1}, {2}, {3}, {4})={5:x}", req,
pid, addr, data, data_size, ret); } while (0)
;
2298
2299 PtraceDisplayBytes(req, data, data_size);
2300
2301 if (error.Fail())
2302 LLDB_LOG(log, "ptrace() failed: {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "ptrace() failed: {0}", error); } while (0)
;
2303
2304 return error;
2305}
2306
2307llvm::Expected<ProcessorTraceMonitor &>
2308NativeProcessLinux::LookupProcessorTraceInstance(lldb::user_id_t traceid,
2309 lldb::tid_t thread) {
2310 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2311 if (thread == LLDB_INVALID_THREAD_ID0 && traceid == m_pt_proces_trace_id) {
2312 LLDB_LOG(log, "thread not specified: {0}", traceid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "thread not specified: {0}", traceid); } while
(0)
;
2313 return Status("tracing not active thread not specified").ToError();
2314 }
2315
2316 for (auto& iter : m_processor_trace_monitor) {
2317 if (traceid == iter.second->GetTraceID() &&
2318 (thread == iter.first || thread == LLDB_INVALID_THREAD_ID0))
2319 return *(iter.second);
2320 }
2321
2322 LLDB_LOG(log, "traceid not being traced: {0}", traceid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid not being traced: {0}", traceid); } while
(0)
;
2323 return Status("tracing not active for this thread").ToError();
2324}
2325
2326Status NativeProcessLinux::GetMetaData(lldb::user_id_t traceid,
2327 lldb::tid_t thread,
2328 llvm::MutableArrayRef<uint8_t> &buffer,
2329 size_t offset) {
2330 TraceOptions trace_options;
2331 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2332 Status error;
2333
2334 LLDB_LOG(log, "traceid {0}", traceid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid {0}", traceid); } while (0)
;
2335
2336 auto perf_monitor = LookupProcessorTraceInstance(traceid, thread);
2337 if (!perf_monitor) {
2338 LLDB_LOG(log, "traceid not being traced: {0}", traceid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid not being traced: {0}", traceid); } while
(0)
;
2339 buffer = buffer.slice(buffer.size());
2340 error = perf_monitor.takeError();
2341 return error;
2342 }
2343 return (*perf_monitor).ReadPerfTraceData(buffer, offset);
2344}
2345
2346Status NativeProcessLinux::GetData(lldb::user_id_t traceid, lldb::tid_t thread,
2347 llvm::MutableArrayRef<uint8_t> &buffer,
2348 size_t offset) {
2349 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2350 Status error;
2351
2352 LLDB_LOG(log, "traceid {0}", traceid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid {0}", traceid); } while (0)
;
2353
2354 auto perf_monitor = LookupProcessorTraceInstance(traceid, thread);
2355 if (!perf_monitor) {
2356 LLDB_LOG(log, "traceid not being traced: {0}", traceid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid not being traced: {0}", traceid); } while
(0)
;
2357 buffer = buffer.slice(buffer.size());
2358 error = perf_monitor.takeError();
2359 return error;
2360 }
2361 return (*perf_monitor).ReadPerfTraceAux(buffer, offset);
2362}
2363
2364Status NativeProcessLinux::GetTraceConfig(lldb::user_id_t traceid,
2365 TraceOptions &config) {
2366 Status error;
2367 if (config.getThreadID() == LLDB_INVALID_THREAD_ID0 &&
2368 m_pt_proces_trace_id == traceid) {
2369 if (m_pt_proces_trace_id == LLDB_INVALID_UID(18446744073709551615UL)) {
2370 error.SetErrorString("tracing not active for this process");
2371 return error;
2372 }
2373 config = m_pt_process_trace_config;
2374 } else {
2375 auto perf_monitor =
2376 LookupProcessorTraceInstance(traceid, config.getThreadID());
2377 if (!perf_monitor) {
2378 error = perf_monitor.takeError();
2379 return error;
2380 }
2381 error = (*perf_monitor).GetTraceConfig(config);
2382 }
2383 return error;
2384}
2385
2386lldb::user_id_t
2387NativeProcessLinux::StartTraceGroup(const TraceOptions &config,
2388 Status &error) {
2389
2390 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2391 if (config.getType() != TraceType::eTraceTypeProcessorTrace)
2392 return LLDB_INVALID_UID(18446744073709551615UL);
2393
2394 if (m_pt_proces_trace_id != LLDB_INVALID_UID(18446744073709551615UL)) {
2395 error.SetErrorString("tracing already active on this process");
2396 return m_pt_proces_trace_id;
2397 }
2398
2399 for (const auto &thread_sp : m_threads) {
2400 if (auto traceInstance = ProcessorTraceMonitor::Create(
2401 GetID(), thread_sp->GetID(), config, true)) {
2402 m_pt_traced_thread_group.insert(thread_sp->GetID());
2403 m_processor_trace_monitor.insert(
2404 std::make_pair(thread_sp->GetID(), std::move(*traceInstance)));
2405 }
2406 }
2407
2408 m_pt_process_trace_config = config;
2409 error = ProcessorTraceMonitor::GetCPUType(m_pt_process_trace_config);
2410
2411 // Trace on Complete process will have traceid of 0
2412 m_pt_proces_trace_id = 0;
2413
2414 LLDB_LOG(log, "Process Trace ID {0}", m_pt_proces_trace_id)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Process Trace ID {0}", m_pt_proces_trace_id)
; } while (0)
;
2415 return m_pt_proces_trace_id;
2416}
2417
2418lldb::user_id_t NativeProcessLinux::StartTrace(const TraceOptions &config,
2419 Status &error) {
2420 if (config.getType() != TraceType::eTraceTypeProcessorTrace)
2421 return NativeProcessProtocol::StartTrace(config, error);
2422
2423 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2424
2425 lldb::tid_t threadid = config.getThreadID();
2426
2427 if (threadid == LLDB_INVALID_THREAD_ID0)
2428 return StartTraceGroup(config, error);
2429
2430 auto thread_sp = GetThreadByID(threadid);
2431 if (!thread_sp) {
2432 // Thread not tracked by lldb so don't trace.
2433 error.SetErrorString("invalid thread id");
2434 return LLDB_INVALID_UID(18446744073709551615UL);
2435 }
2436
2437 const auto &iter = m_processor_trace_monitor.find(threadid);
2438 if (iter != m_processor_trace_monitor.end()) {
2439 LLDB_LOG(log, "Thread already being traced")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Thread already being traced"); } while (0)
;
2440 error.SetErrorString("tracing already active on this thread");
2441 return LLDB_INVALID_UID(18446744073709551615UL);
2442 }
2443
2444 auto traceMonitor =
2445 ProcessorTraceMonitor::Create(GetID(), threadid, config, false);
2446 if (!traceMonitor) {
2447 error = traceMonitor.takeError();
2448 LLDB_LOG(log, "error {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "error {0}", error); } while (0)
;
2449 return LLDB_INVALID_UID(18446744073709551615UL);
2450 }
2451 lldb::user_id_t ret_trace_id = (*traceMonitor)->GetTraceID();
2452 m_processor_trace_monitor.insert(
2453 std::make_pair(threadid, std::move(*traceMonitor)));
2454 return ret_trace_id;
2455}
2456
2457Status NativeProcessLinux::StopTracingForThread(lldb::tid_t thread) {
2458 Status error;
2459 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2460 LLDB_LOG(log, "Thread {0}", thread)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Thread {0}", thread); } while (0)
;
2461
2462 const auto& iter = m_processor_trace_monitor.find(thread);
2463 if (iter == m_processor_trace_monitor.end()) {
2464 error.SetErrorString("tracing not active for this thread");
2465 return error;
2466 }
2467
2468 if (iter->second->GetTraceID() == m_pt_proces_trace_id) {
2469 // traceid maps to the whole process so we have to erase it from the
2470 // thread group.
2471 LLDB_LOG(log, "traceid maps to process")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid maps to process"); } while (0)
;
2472 m_pt_traced_thread_group.erase(thread);
2473 }
2474 m_processor_trace_monitor.erase(iter);
2475
2476 return error;
2477}
2478
2479Status NativeProcessLinux::StopTrace(lldb::user_id_t traceid,
2480 lldb::tid_t thread) {
2481 Status error;
2482
2483 TraceOptions trace_options;
2484 trace_options.setThreadID(thread);
2485 error = NativeProcessLinux::GetTraceConfig(traceid, trace_options);
2486
2487 if (error.Fail())
2488 return error;
2489
2490 switch (trace_options.getType()) {
2491 case lldb::TraceType::eTraceTypeProcessorTrace:
2492 if (traceid == m_pt_proces_trace_id &&
2493 thread == LLDB_INVALID_THREAD_ID0)
2494 StopProcessorTracingOnProcess();
2495 else
2496 error = StopProcessorTracingOnThread(traceid, thread);
2497 break;
2498 default:
2499 error.SetErrorString("trace not supported");
2500 break;
2501 }
2502
2503 return error;
2504}
2505
2506void NativeProcessLinux::StopProcessorTracingOnProcess() {
2507 for (auto thread_id_iter : m_pt_traced_thread_group)
2508 m_processor_trace_monitor.erase(thread_id_iter);
2509 m_pt_traced_thread_group.clear();
2510 m_pt_proces_trace_id = LLDB_INVALID_UID(18446744073709551615UL);
2511}
2512
2513Status NativeProcessLinux::StopProcessorTracingOnThread(lldb::user_id_t traceid,
2514 lldb::tid_t thread) {
2515 Status error;
2516 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2517
2518 if (thread == LLDB_INVALID_THREAD_ID0) {
2519 for (auto& iter : m_processor_trace_monitor) {
2520 if (iter.second->GetTraceID() == traceid) {
2521 // Stopping a trace instance for an individual thread
2522 // hence there will only be one traceid that can match.
2523 m_processor_trace_monitor.erase(iter.first);
2524 return error;
2525 }
2526 LLDB_LOG(log, "Trace ID {0}", iter.second->GetTraceID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Trace ID {0}", iter.second->GetTraceID())
; } while (0)
;
2527 }
2528
2529 LLDB_LOG(log, "Invalid TraceID")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Invalid TraceID"); } while (0)
;
2530 error.SetErrorString("invalid trace id");
2531 return error;
2532 }
2533
2534 // thread is specified so we can use find function on the map.
2535 const auto& iter = m_processor_trace_monitor.find(thread);
2536 if (iter == m_processor_trace_monitor.end()) {
2537 // thread not found in our map.
2538 LLDB_LOG(log, "thread not being traced")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "thread not being traced"); } while (0)
;
2539 error.SetErrorString("tracing not active for this thread");
2540 return error;
2541 }
2542 if (iter->second->GetTraceID() != traceid) {
2543 // traceid did not match so it has to be invalid.
2544 LLDB_LOG(log, "Invalid TraceID")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Invalid TraceID"); } while (0)
;
2545 error.SetErrorString("invalid trace id");
2546 return error;
2547 }
2548
2549 LLDB_LOG(log, "UID - {0} , Thread -{1}", traceid, thread)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "UID - {0} , Thread -{1}", traceid, thread); }
while (0)
;
2550
2551 if (traceid == m_pt_proces_trace_id) {
2552 // traceid maps to the whole process so we have to erase it from the
2553 // thread group.
2554 LLDB_LOG(log, "traceid maps to process")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn316068/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid maps to process"); } while (0)
;
2555 m_pt_traced_thread_group.erase(thread);
2556 }
2557 m_processor_trace_monitor.erase(iter);
2558
2559 return error;
2560}