Bug Summary

File:tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
Warning:line 27, column 37
Undefined or garbage value returned to caller

Annotated Source Code

/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp

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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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);
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~svn318211/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~svn318211/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) {
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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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);
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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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~svn318211/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 NativeRegisterContext& register_context = 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);
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.GetRegisterInfo(
1012 eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC0);
1013 const RegisterInfo *reg_info_flags = register_context.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~svn318211/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~svn318211/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);
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 = register_context.GetPC() + emulator_ap->GetOpcode().GetByteSize();
1038 next_flags = ReadFlags(register_context);
1039 } else {
1040 // The instruction emulation failed after it modified the PC. It is an
1041 // unknown error where we can't continue because the next instruction is
1042 // modifying the PC but we don't know how.
1043 return Status("Instruction emulation failed unexpectedly.");
1044 }
1045
1046 if (m_arch.GetMachine() == llvm::Triple::arm) {
1047 if (next_flags & 0x20) {
1048 // Thumb mode
1049 error = SetSoftwareBreakpoint(next_pc, 2);
1050 } else {
1051 // Arm mode
1052 error = SetSoftwareBreakpoint(next_pc, 4);
1053 }
1054 } else if (m_arch.GetMachine() == llvm::Triple::mips64 ||
1055 m_arch.GetMachine() == llvm::Triple::mips64el ||
1056 m_arch.GetMachine() == llvm::Triple::mips ||
1057 m_arch.GetMachine() == llvm::Triple::mipsel ||
1058 m_arch.GetMachine() == llvm::Triple::ppc64le)
1059 error = SetSoftwareBreakpoint(next_pc, 4);
1060 else {
1061 // No size hint is given for the next breakpoint
1062 error = SetSoftwareBreakpoint(next_pc, 0);
1063 }
1064
1065 // If setting the breakpoint fails because next_pc is out of
1066 // the address space, ignore it and let the debugee segfault.
1067 if (error.GetError() == EIO5 || error.GetError() == EFAULT14) {
1068 return Status();
1069 } else if (error.Fail())
1070 return error;
1071
1072 m_threads_stepping_with_breakpoint.insert({thread.GetID(), next_pc});
1073
1074 return Status();
1075}
1076
1077bool NativeProcessLinux::SupportHardwareSingleStepping() const {
1078 if (m_arch.GetMachine() == llvm::Triple::arm ||
1079 m_arch.GetMachine() == llvm::Triple::mips64 ||
1080 m_arch.GetMachine() == llvm::Triple::mips64el ||
1081 m_arch.GetMachine() == llvm::Triple::mips ||
1082 m_arch.GetMachine() == llvm::Triple::mipsel)
1083 return false;
1084 return true;
1085}
1086
1087Status NativeProcessLinux::Resume(const ResumeActionList &resume_actions) {
1088 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1089 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0}", GetID()); } while (0)
;
1090
1091 bool software_single_step = !SupportHardwareSingleStepping();
1092
1093 if (software_single_step) {
1094 for (const auto &thread : m_threads) {
1095 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1095, __PRETTY_FUNCTION__))
;
1096
1097 const ResumeAction *const action =
1098 resume_actions.GetActionForThread(thread->GetID(), true);
1099 if (action == nullptr)
1100 continue;
1101
1102 if (action->state == eStateStepping) {
1103 Status error = SetupSoftwareSingleStepping(
1104 static_cast<NativeThreadLinux &>(*thread));
1105 if (error.Fail())
1106 return error;
1107 }
1108 }
1109 }
1110
1111 for (const auto &thread : m_threads) {
1112 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1112, __PRETTY_FUNCTION__))
;
1113
1114 const ResumeAction *const action =
1115 resume_actions.GetActionForThread(thread->GetID(), true);
1116
1117 if (action == nullptr) {
1118 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "no action specified for pid {0} tid {1}", GetID
(), thread->GetID()); } while (0)
1119 thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "no action specified for pid {0} tid {1}", GetID
(), thread->GetID()); } while (0)
;
1120 continue;
1121 }
1122
1123 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~svn318211/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)
1124 action->state, GetID(), thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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
1126 switch (action->state) {
1127 case eStateRunning:
1128 case eStateStepping: {
1129 // Run the thread, possibly feeding it the signal.
1130 const int signo = action->signal;
1131 ResumeThread(static_cast<NativeThreadLinux &>(*thread), action->state,
1132 signo);
1133 break;
1134 }
1135
1136 case eStateSuspended:
1137 case eStateStopped:
1138 llvm_unreachable("Unexpected state")::llvm::llvm_unreachable_internal("Unexpected state", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1138)
;
1139
1140 default:
1141 return Status("NativeProcessLinux::%s (): unexpected state %s specified "
1142 "for pid %" PRIu64"l" "u" ", tid %" PRIu64"l" "u",
1143 __FUNCTION__, StateAsCString(action->state), GetID(),
1144 thread->GetID());
1145 }
1146 }
1147
1148 return Status();
1149}
1150
1151Status NativeProcessLinux::Halt() {
1152 Status error;
1153
1154 if (kill(GetID(), SIGSTOP19) != 0)
1155 error.SetErrorToErrno();
1156
1157 return error;
1158}
1159
1160Status NativeProcessLinux::Detach() {
1161 Status error;
1162
1163 // Stop monitoring the inferior.
1164 m_sigchld_handle.reset();
1165
1166 // Tell ptrace to detach from the process.
1167 if (GetID() == LLDB_INVALID_PROCESS_ID0)
1168 return error;
1169
1170 for (const auto &thread : m_threads) {
1171 Status e = Detach(thread->GetID());
1172 if (e.Fail())
1173 error =
1174 e; // Save the error, but still attempt to detach from other threads.
1175 }
1176
1177 m_processor_trace_monitor.clear();
1178 m_pt_proces_trace_id = LLDB_INVALID_UID(18446744073709551615UL);
1179
1180 return error;
1181}
1182
1183Status NativeProcessLinux::Signal(int signo) {
1184 Status error;
1185
1186 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1187 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "sending signal {0} ({1}) to pid {1}", signo,
Host::GetSignalAsCString(signo), GetID()); } while (0)
1188 Host::GetSignalAsCString(signo), GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "sending signal {0} ({1}) to pid {1}", signo,
Host::GetSignalAsCString(signo), GetID()); } while (0)
;
1189
1190 if (kill(GetID(), signo))
1191 error.SetErrorToErrno();
1192
1193 return error;
1194}
1195
1196Status NativeProcessLinux::Interrupt() {
1197 // Pick a running thread (or if none, a not-dead stopped thread) as
1198 // the chosen thread that will be the stop-reason thread.
1199 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1200
1201 NativeThreadProtocol *running_thread = nullptr;
1202 NativeThreadProtocol *stopped_thread = nullptr;
1203
1204 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "selecting running thread for interrupt target"
); } while (0)
;
1205 for (const auto &thread : m_threads) {
1206 // If we have a running or stepping thread, we'll call that the
1207 // target of the interrupt.
1208 const auto thread_state = thread->GetState();
1209 if (thread_state == eStateRunning || thread_state == eStateStepping) {
1210 running_thread = thread.get();
1211 break;
1212 } else if (!stopped_thread && StateIsStoppedState(thread_state, true)) {
1213 // Remember the first non-dead stopped thread. We'll use that as a backup
1214 // if there are no running threads.
1215 stopped_thread = thread.get();
1216 }
1217 }
1218
1219 if (!running_thread && !stopped_thread) {
1220 Status error("found no running/stepping or live stopped threads as target "
1221 "for interrupt");
1222 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "skipping due to error: {0}", error); } while
(0)
;
1223
1224 return error;
1225 }
1226
1227 NativeThreadProtocol *deferred_signal_thread =
1228 running_thread ? running_thread : stopped_thread;
1229
1230 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~svn318211/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)
1231 running_thread ? "running" : "stopped",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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 deferred_signal_thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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
1234 StopRunningThreads(deferred_signal_thread->GetID());
1235
1236 return Status();
1237}
1238
1239Status NativeProcessLinux::Kill() {
1240 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1241 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0}", GetID()); } while (0)
;
1242
1243 Status error;
1244
1245 switch (m_state) {
1246 case StateType::eStateInvalid:
1247 case StateType::eStateExited:
1248 case StateType::eStateCrashed:
1249 case StateType::eStateDetached:
1250 case StateType::eStateUnloaded:
1251 // Nothing to do - the process is already dead.
1252 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "ignored for PID {0} due to current state: {1}"
, GetID(), m_state); } while (0)
1253 m_state)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "ignored for PID {0} due to current state: {1}"
, GetID(), m_state); } while (0)
;
1254 return error;
1255
1256 case StateType::eStateConnected:
1257 case StateType::eStateAttaching:
1258 case StateType::eStateLaunching:
1259 case StateType::eStateStopped:
1260 case StateType::eStateRunning:
1261 case StateType::eStateStepping:
1262 case StateType::eStateSuspended:
1263 // We can try to kill a process in these states.
1264 break;
1265 }
1266
1267 if (kill(GetID(), SIGKILL9) != 0) {
1268 error.SetErrorToErrno();
1269 return error;
1270 }
1271
1272 return error;
1273}
1274
1275static Status
1276ParseMemoryRegionInfoFromProcMapsLine(llvm::StringRef &maps_line,
1277 MemoryRegionInfo &memory_region_info) {
1278 memory_region_info.Clear();
1279
1280 StringExtractor line_extractor(maps_line);
1281
1282 // Format: {address_start_hex}-{address_end_hex} perms offset dev inode
1283 // pathname
1284 // perms: rwxp (letter is present if set, '-' if not, final character is
1285 // p=private, s=shared).
1286
1287 // Parse out the starting address
1288 lldb::addr_t start_address = line_extractor.GetHexMaxU64(false, 0);
1289
1290 // Parse out hyphen separating start and end address from range.
1291 if (!line_extractor.GetBytesLeft() || (line_extractor.GetChar() != '-'))
1292 return Status(
1293 "malformed /proc/{pid}/maps entry, missing dash between address range");
1294
1295 // Parse out the ending address
1296 lldb::addr_t end_address = line_extractor.GetHexMaxU64(false, start_address);
1297
1298 // Parse out the space after the address.
1299 if (!line_extractor.GetBytesLeft() || (line_extractor.GetChar() != ' '))
1300 return Status(
1301 "malformed /proc/{pid}/maps entry, missing space after range");
1302
1303 // Save the range.
1304 memory_region_info.GetRange().SetRangeBase(start_address);
1305 memory_region_info.GetRange().SetRangeEnd(end_address);
1306
1307 // Any memory region in /proc/{pid}/maps is by definition mapped into the
1308 // process.
1309 memory_region_info.SetMapped(MemoryRegionInfo::OptionalBool::eYes);
1310
1311 // Parse out each permission entry.
1312 if (line_extractor.GetBytesLeft() < 4)
1313 return Status("malformed /proc/{pid}/maps entry, missing some portion of "
1314 "permissions");
1315
1316 // Handle read permission.
1317 const char read_perm_char = line_extractor.GetChar();
1318 if (read_perm_char == 'r')
1319 memory_region_info.SetReadable(MemoryRegionInfo::OptionalBool::eYes);
1320 else if (read_perm_char == '-')
1321 memory_region_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
1322 else
1323 return Status("unexpected /proc/{pid}/maps read permission char");
1324
1325 // Handle write permission.
1326 const char write_perm_char = line_extractor.GetChar();
1327 if (write_perm_char == 'w')
1328 memory_region_info.SetWritable(MemoryRegionInfo::OptionalBool::eYes);
1329 else if (write_perm_char == '-')
1330 memory_region_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
1331 else
1332 return Status("unexpected /proc/{pid}/maps write permission char");
1333
1334 // Handle execute permission.
1335 const char exec_perm_char = line_extractor.GetChar();
1336 if (exec_perm_char == 'x')
1337 memory_region_info.SetExecutable(MemoryRegionInfo::OptionalBool::eYes);
1338 else if (exec_perm_char == '-')
1339 memory_region_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
1340 else
1341 return Status("unexpected /proc/{pid}/maps exec permission char");
1342
1343 line_extractor.GetChar(); // Read the private bit
1344 line_extractor.SkipSpaces(); // Skip the separator
1345 line_extractor.GetHexMaxU64(false, 0); // Read the offset
1346 line_extractor.GetHexMaxU64(false, 0); // Read the major device number
1347 line_extractor.GetChar(); // Read the device id separator
1348 line_extractor.GetHexMaxU64(false, 0); // Read the major device number
1349 line_extractor.SkipSpaces(); // Skip the separator
1350 line_extractor.GetU64(0, 10); // Read the inode number
1351
1352 line_extractor.SkipSpaces();
1353 const char *name = line_extractor.Peek();
1354 if (name)
1355 memory_region_info.SetName(name);
1356
1357 return Status();
1358}
1359
1360Status NativeProcessLinux::GetMemoryRegionInfo(lldb::addr_t load_addr,
1361 MemoryRegionInfo &range_info) {
1362 // FIXME review that the final memory region returned extends to the end of
1363 // the virtual address space,
1364 // with no perms if it is not mapped.
1365
1366 // Use an approach that reads memory regions from /proc/{pid}/maps.
1367 // Assume proc maps entries are in ascending order.
1368 // FIXME assert if we find differently.
1369
1370 if (m_supports_mem_region == LazyBool::eLazyBoolNo) {
1371 // We're done.
1372 return Status("unsupported");
1373 }
1374
1375 Status error = PopulateMemoryRegionCache();
1376 if (error.Fail()) {
1377 return error;
1378 }
1379
1380 lldb::addr_t prev_base_address = 0;
1381
1382 // FIXME start by finding the last region that is <= target address using
1383 // binary search. Data is sorted.
1384 // There can be a ton of regions on pthreads apps with lots of threads.
1385 for (auto it = m_mem_region_cache.begin(); it != m_mem_region_cache.end();
1386 ++it) {
1387 MemoryRegionInfo &proc_entry_info = it->first;
1388
1389 // Sanity check assumption that /proc/{pid}/maps entries are ascending.
1390 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1391, __PRETTY_FUNCTION__))
1391 "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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1391, __PRETTY_FUNCTION__))
;
1392 prev_base_address = proc_entry_info.GetRange().GetRangeBase();
1393 UNUSED_IF_ASSERT_DISABLED(prev_base_address)((void)(prev_base_address));
1394
1395 // If the target address comes before this entry, indicate distance to next
1396 // region.
1397 if (load_addr < proc_entry_info.GetRange().GetRangeBase()) {
1398 range_info.GetRange().SetRangeBase(load_addr);
1399 range_info.GetRange().SetByteSize(
1400 proc_entry_info.GetRange().GetRangeBase() - load_addr);
1401 range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
1402 range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
1403 range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
1404 range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo);
1405
1406 return error;
1407 } else if (proc_entry_info.GetRange().Contains(load_addr)) {
1408 // The target address is within the memory region we're processing here.
1409 range_info = proc_entry_info;
1410 return error;
1411 }
1412
1413 // The target memory address comes somewhere after the region we just
1414 // parsed.
1415 }
1416
1417 // If we made it here, we didn't find an entry that contained the given
1418 // address. Return the
1419 // load_addr as start and the amount of bytes betwwen load address and the end
1420 // of the memory as
1421 // size.
1422 range_info.GetRange().SetRangeBase(load_addr);
1423 range_info.GetRange().SetRangeEnd(LLDB_INVALID_ADDRESS(18446744073709551615UL));
1424 range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
1425 range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
1426 range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
1427 range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo);
1428 return error;
1429}
1430
1431Status NativeProcessLinux::PopulateMemoryRegionCache() {
1432 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1433
1434 // If our cache is empty, pull the latest. There should always be at least
1435 // one memory region if memory region handling is supported.
1436 if (!m_mem_region_cache.empty()) {
1437 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "reusing {0} cached memory region entries", m_mem_region_cache
.size()); } while (0)
1438 m_mem_region_cache.size())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "reusing {0} cached memory region entries", m_mem_region_cache
.size()); } while (0)
;
1439 return Status();
1440 }
1441
1442 auto BufferOrError = getProcFile(GetID(), "maps");
1443 if (!BufferOrError) {
1444 m_supports_mem_region = LazyBool::eLazyBoolNo;
1445 return BufferOrError.getError();
1446 }
1447 StringRef Rest = BufferOrError.get()->getBuffer();
1448 while (! Rest.empty()) {
1449 StringRef Line;
1450 std::tie(Line, Rest) = Rest.split('\n');
1451 MemoryRegionInfo info;
1452 const Status parse_error =
1453 ParseMemoryRegionInfoFromProcMapsLine(Line, info);
1454 if (parse_error.Fail()) {
1455 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to parse proc maps line '{0}': {1}", Line
, parse_error); } while (0)
1456 parse_error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to parse proc maps line '{0}': {1}", Line
, parse_error); } while (0)
;
1457 m_supports_mem_region = LazyBool::eLazyBoolNo;
1458 return parse_error;
1459 }
1460 m_mem_region_cache.emplace_back(
1461 info, FileSpec(info.GetName().GetCString(), true));
1462 }
1463
1464 if (m_mem_region_cache.empty()) {
1465 // No entries after attempting to read them. This shouldn't happen if
1466 // /proc/{pid}/maps is supported. Assume we don't support map entries
1467 // via procfs.
1468 m_supports_mem_region = LazyBool::eLazyBoolNo;
1469 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
1470 "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~svn318211/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 "for memory region metadata retrieval")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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 return Status("not supported");
1473 }
1474
1475 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~svn318211/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)
1476 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~svn318211/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
1478 // We support memory retrieval, remember that.
1479 m_supports_mem_region = LazyBool::eLazyBoolYes;
1480 return Status();
1481}
1482
1483void NativeProcessLinux::DoStopIDBumped(uint32_t newBumpId) {
1484 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1485 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "newBumpId={0}", newBumpId); } while (0)
;
1486 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "clearing {0} entries from memory region cache"
, m_mem_region_cache.size()); } while (0)
1487 m_mem_region_cache.size())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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.clear();
1489}
1490
1491Status NativeProcessLinux::AllocateMemory(size_t size, uint32_t permissions,
1492 lldb::addr_t &addr) {
1493// FIXME implementing this requires the equivalent of
1494// InferiorCallPOSIX::InferiorCallMmap, which depends on
1495// functional ThreadPlans working with Native*Protocol.
1496#if 1
1497 return Status("not implemented yet");
1498#else
1499 addr = LLDB_INVALID_ADDRESS(18446744073709551615UL);
1500
1501 unsigned prot = 0;
1502 if (permissions & lldb::ePermissionsReadable)
1503 prot |= eMmapProtRead;
1504 if (permissions & lldb::ePermissionsWritable)
1505 prot |= eMmapProtWrite;
1506 if (permissions & lldb::ePermissionsExecutable)
1507 prot |= eMmapProtExec;
1508
1509 // TODO implement this directly in NativeProcessLinux
1510 // (and lift to NativeProcessPOSIX if/when that class is
1511 // refactored out).
1512 if (InferiorCallMmap(this, addr, 0, size, prot,
1513 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) {
1514 m_addr_to_mmap_size[addr] = size;
1515 return Status();
1516 } else {
1517 addr = LLDB_INVALID_ADDRESS(18446744073709551615UL);
1518 return Status("unable to allocate %" PRIu64"l" "u"
1519 " bytes of memory with permissions %s",
1520 size, GetPermissionsAsCString(permissions));
1521 }
1522#endif
1523}
1524
1525Status NativeProcessLinux::DeallocateMemory(lldb::addr_t addr) {
1526 // FIXME see comments in AllocateMemory - required lower-level
1527 // bits not in place yet (ThreadPlans)
1528 return Status("not implemented");
1529}
1530
1531lldb::addr_t NativeProcessLinux::GetSharedLibraryInfoAddress() {
1532 // punt on this for now
1533 return LLDB_INVALID_ADDRESS(18446744073709551615UL);
1534}
1535
1536size_t NativeProcessLinux::UpdateThreads() {
1537 // The NativeProcessLinux monitoring threads are always up to date
1538 // with respect to thread state and they keep the thread list
1539 // populated properly. All this method needs to do is return the
1540 // thread count.
1541 return m_threads.size();
1542}
1543
1544Status NativeProcessLinux::GetSoftwareBreakpointPCOffset(
1545 uint32_t &actual_opcode_size) {
1546 // FIXME put this behind a breakpoint protocol class that can be
1547 // set per architecture. Need ARM, MIPS support here.
1548 static const uint8_t g_i386_opcode[] = {0xCC};
1549 static const uint8_t g_s390x_opcode[] = {0x00, 0x01};
1550 static const uint8_t g_ppc64le_opcode[] = {0x08, 0x00, 0xe0, 0x7f}; // trap
1551
1552 switch (m_arch.GetMachine()) {
1553 case llvm::Triple::x86:
1554 case llvm::Triple::x86_64:
1555 actual_opcode_size = static_cast<uint32_t>(sizeof(g_i386_opcode));
1556 return Status();
1557
1558 case llvm::Triple::systemz:
1559 actual_opcode_size = static_cast<uint32_t>(sizeof(g_s390x_opcode));
1560 return Status();
1561
1562 case llvm::Triple::ppc64le:
1563 actual_opcode_size = static_cast<uint32_t>(sizeof(g_ppc64le_opcode));
1564 return Status();
1565
1566 case llvm::Triple::arm:
1567 case llvm::Triple::aarch64:
1568 case llvm::Triple::mips64:
1569 case llvm::Triple::mips64el:
1570 case llvm::Triple::mips:
1571 case llvm::Triple::mipsel:
1572 // On these architectures the PC don't get updated for breakpoint hits
1573 actual_opcode_size = 0;
1574 return Status();
1575
1576 default:
1577 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1577, __PRETTY_FUNCTION__))
;
1578 return Status("CPU type not supported");
1579 }
1580}
1581
1582Status NativeProcessLinux::SetBreakpoint(lldb::addr_t addr, uint32_t size,
1583 bool hardware) {
1584 if (hardware)
1585 return SetHardwareBreakpoint(addr, size);
1586 else
1587 return SetSoftwareBreakpoint(addr, size);
1588}
1589
1590Status NativeProcessLinux::RemoveBreakpoint(lldb::addr_t addr, bool hardware) {
1591 if (hardware)
1592 return RemoveHardwareBreakpoint(addr);
1593 else
1594 return NativeProcessProtocol::RemoveBreakpoint(addr);
1595}
1596
1597Status NativeProcessLinux::GetSoftwareBreakpointTrapOpcode(
1598 size_t trap_opcode_size_hint, size_t &actual_opcode_size,
1599 const uint8_t *&trap_opcode_bytes) {
1600 // FIXME put this behind a breakpoint protocol class that can be set per
1601 // architecture. Need MIPS support here.
1602 static const uint8_t g_aarch64_opcode[] = {0x00, 0x00, 0x20, 0xd4};
1603 // The ARM reference recommends the use of 0xe7fddefe and 0xdefe but the
1604 // linux kernel does otherwise.
1605 static const uint8_t g_arm_breakpoint_opcode[] = {0xf0, 0x01, 0xf0, 0xe7};
1606 static const uint8_t g_i386_opcode[] = {0xCC};
1607 static const uint8_t g_mips64_opcode[] = {0x00, 0x00, 0x00, 0x0d};
1608 static const uint8_t g_mips64el_opcode[] = {0x0d, 0x00, 0x00, 0x00};
1609 static const uint8_t g_s390x_opcode[] = {0x00, 0x01};
1610 static const uint8_t g_thumb_breakpoint_opcode[] = {0x01, 0xde};
1611 static const uint8_t g_ppc64le_opcode[] = {0x08, 0x00, 0xe0, 0x7f}; // trap
1612
1613 switch (m_arch.GetMachine()) {
1614 case llvm::Triple::aarch64:
1615 trap_opcode_bytes = g_aarch64_opcode;
1616 actual_opcode_size = sizeof(g_aarch64_opcode);
1617 return Status();
1618
1619 case llvm::Triple::arm:
1620 switch (trap_opcode_size_hint) {
1621 case 2:
1622 trap_opcode_bytes = g_thumb_breakpoint_opcode;
1623 actual_opcode_size = sizeof(g_thumb_breakpoint_opcode);
1624 return Status();
1625 case 4:
1626 trap_opcode_bytes = g_arm_breakpoint_opcode;
1627 actual_opcode_size = sizeof(g_arm_breakpoint_opcode);
1628 return Status();
1629 default:
1630 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1630, __PRETTY_FUNCTION__))
;
1631 return Status("Unrecognised trap opcode size hint!");
1632 }
1633
1634 case llvm::Triple::x86:
1635 case llvm::Triple::x86_64:
1636 trap_opcode_bytes = g_i386_opcode;
1637 actual_opcode_size = sizeof(g_i386_opcode);
1638 return Status();
1639
1640 case llvm::Triple::mips:
1641 case llvm::Triple::mips64:
1642 trap_opcode_bytes = g_mips64_opcode;
1643 actual_opcode_size = sizeof(g_mips64_opcode);
1644 return Status();
1645
1646 case llvm::Triple::mipsel:
1647 case llvm::Triple::mips64el:
1648 trap_opcode_bytes = g_mips64el_opcode;
1649 actual_opcode_size = sizeof(g_mips64el_opcode);
1650 return Status();
1651
1652 case llvm::Triple::systemz:
1653 trap_opcode_bytes = g_s390x_opcode;
1654 actual_opcode_size = sizeof(g_s390x_opcode);
1655 return Status();
1656
1657 case llvm::Triple::ppc64le:
1658 trap_opcode_bytes = g_ppc64le_opcode;
1659 actual_opcode_size = sizeof(g_ppc64le_opcode);
1660 return Status();
1661
1662 default:
1663 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1663, __PRETTY_FUNCTION__))
;
1664 return Status("CPU type not supported");
1665 }
1666}
1667
1668#if 0
1669ProcessMessage::CrashReason
1670NativeProcessLinux::GetCrashReasonForSIGSEGV(const siginfo_t *info)
1671{
1672 ProcessMessage::CrashReason reason;
1673 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1673, __PRETTY_FUNCTION__))
;
1674
1675 reason = ProcessMessage::eInvalidCrashReason;
1676
1677 switch (info->si_code)
1678 {
1679 default:
1680 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1680, __PRETTY_FUNCTION__))
;
1681 break;
1682 case SI_KERNELSI_KERNEL:
1683 // Linux will occasionally send spurious SI_KERNEL codes.
1684 // (this is poorly documented in sigaction)
1685 // One way to get this is via unaligned SIMD loads.
1686 reason = ProcessMessage::eInvalidAddress; // for lack of anything better
1687 break;
1688 case SEGV_MAPERRSEGV_MAPERR:
1689 reason = ProcessMessage::eInvalidAddress;
1690 break;
1691 case SEGV_ACCERRSEGV_ACCERR:
1692 reason = ProcessMessage::ePrivilegedAddress;
1693 break;
1694 }
1695
1696 return reason;
1697}
1698#endif
1699
1700#if 0
1701ProcessMessage::CrashReason
1702NativeProcessLinux::GetCrashReasonForSIGILL(const siginfo_t *info)
1703{
1704 ProcessMessage::CrashReason reason;
1705 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1705, __PRETTY_FUNCTION__))
;
1706
1707 reason = ProcessMessage::eInvalidCrashReason;
1708
1709 switch (info->si_code)
1710 {
1711 default:
1712 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1712, __PRETTY_FUNCTION__))
;
1713 break;
1714 case ILL_ILLOPCILL_ILLOPC:
1715 reason = ProcessMessage::eIllegalOpcode;
1716 break;
1717 case ILL_ILLOPNILL_ILLOPN:
1718 reason = ProcessMessage::eIllegalOperand;
1719 break;
1720 case ILL_ILLADRILL_ILLADR:
1721 reason = ProcessMessage::eIllegalAddressingMode;
1722 break;
1723 case ILL_ILLTRPILL_ILLTRP:
1724 reason = ProcessMessage::eIllegalTrap;
1725 break;
1726 case ILL_PRVOPCILL_PRVOPC:
1727 reason = ProcessMessage::ePrivilegedOpcode;
1728 break;
1729 case ILL_PRVREGILL_PRVREG:
1730 reason = ProcessMessage::ePrivilegedRegister;
1731 break;
1732 case ILL_COPROCILL_COPROC:
1733 reason = ProcessMessage::eCoprocessorError;
1734 break;
1735 case ILL_BADSTKILL_BADSTK:
1736 reason = ProcessMessage::eInternalStackError;
1737 break;
1738 }
1739
1740 return reason;
1741}
1742#endif
1743
1744#if 0
1745ProcessMessage::CrashReason
1746NativeProcessLinux::GetCrashReasonForSIGFPE(const siginfo_t *info)
1747{
1748 ProcessMessage::CrashReason reason;
1749 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1749, __PRETTY_FUNCTION__))
;
1750
1751 reason = ProcessMessage::eInvalidCrashReason;
1752
1753 switch (info->si_code)
1754 {
1755 default:
1756 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1756, __PRETTY_FUNCTION__))
;
1757 break;
1758 case FPE_INTDIVFPE_INTDIV:
1759 reason = ProcessMessage::eIntegerDivideByZero;
1760 break;
1761 case FPE_INTOVFFPE_INTOVF:
1762 reason = ProcessMessage::eIntegerOverflow;
1763 break;
1764 case FPE_FLTDIVFPE_FLTDIV:
1765 reason = ProcessMessage::eFloatDivideByZero;
1766 break;
1767 case FPE_FLTOVFFPE_FLTOVF:
1768 reason = ProcessMessage::eFloatOverflow;
1769 break;
1770 case FPE_FLTUNDFPE_FLTUND:
1771 reason = ProcessMessage::eFloatUnderflow;
1772 break;
1773 case FPE_FLTRESFPE_FLTRES:
1774 reason = ProcessMessage::eFloatInexactResult;
1775 break;
1776 case FPE_FLTINVFPE_FLTINV:
1777 reason = ProcessMessage::eFloatInvalidOperation;
1778 break;
1779 case FPE_FLTSUBFPE_FLTSUB:
1780 reason = ProcessMessage::eFloatSubscriptRange;
1781 break;
1782 }
1783
1784 return reason;
1785}
1786#endif
1787
1788#if 0
1789ProcessMessage::CrashReason
1790NativeProcessLinux::GetCrashReasonForSIGBUS(const siginfo_t *info)
1791{
1792 ProcessMessage::CrashReason reason;
1793 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1793, __PRETTY_FUNCTION__))
;
1794
1795 reason = ProcessMessage::eInvalidCrashReason;
1796
1797 switch (info->si_code)
1798 {
1799 default:
1800 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1800, __PRETTY_FUNCTION__))
;
1801 break;
1802 case BUS_ADRALNBUS_ADRALN:
1803 reason = ProcessMessage::eIllegalAlignment;
1804 break;
1805 case BUS_ADRERRBUS_ADRERR:
1806 reason = ProcessMessage::eIllegalAddress;
1807 break;
1808 case BUS_OBJERRBUS_OBJERR:
1809 reason = ProcessMessage::eHardwareError;
1810 break;
1811 }
1812
1813 return reason;
1814}
1815#endif
1816
1817Status NativeProcessLinux::ReadMemory(lldb::addr_t addr, void *buf, size_t size,
1818 size_t &bytes_read) {
1819 if (ProcessVmReadvSupported()) {
1820 // The process_vm_readv path is about 50 times faster than ptrace api. We
1821 // want to use
1822 // this syscall if it is supported.
1823
1824 const ::pid_t pid = GetID();
1825
1826 struct iovec local_iov, remote_iov;
1827 local_iov.iov_base = buf;
1828 local_iov.iov_len = size;
1829 remote_iov.iov_base = reinterpret_cast<void *>(addr);
1830 remote_iov.iov_len = size;
1831
1832 bytes_read = process_vm_readv(pid, &local_iov, 1, &remote_iov, 1, 0);
1833 const bool success = bytes_read == size;
1834
1835 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
1836 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
1837 "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~svn318211/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)
1838 "address {1:x}: {2}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
1839 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~svn318211/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)
;
1840
1841 if (success)
1842 return Status();
1843 // else the call failed for some reason, let's retry the read using ptrace
1844 // api.
1845 }
1846
1847 unsigned char *dst = static_cast<unsigned char *>(buf);
1848 size_t remainder;
1849 long data;
1850
1851 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY(1u << 4)));
1852 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "addr = {0}, buf = {1}, size = {2}", addr, buf
, size); } while (0)
;
1853
1854 for (bytes_read = 0; bytes_read < size; bytes_read += remainder) {
1855 Status error = NativeProcessLinux::PtraceWrapper(
1856 PTRACE_PEEKDATA, GetID(), (void *)addr, nullptr, 0, &data);
1857 if (error.Fail())
1858 return error;
1859
1860 remainder = size - bytes_read;
1861 remainder = remainder > k_ptrace_word_size ? k_ptrace_word_size : remainder;
1862
1863 // Copy the data into our buffer
1864 memcpy(dst, &data, remainder);
1865
1866 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "[{0:x}]:{1:x}", addr, data); } while (0)
;
1867 addr += k_ptrace_word_size;
1868 dst += k_ptrace_word_size;
1869 }
1870 return Status();
1871}
1872
1873Status NativeProcessLinux::ReadMemoryWithoutTrap(lldb::addr_t addr, void *buf,
1874 size_t size,
1875 size_t &bytes_read) {
1876 Status error = ReadMemory(addr, buf, size, bytes_read);
1877 if (error.Fail())
1878 return error;
1879 return m_breakpoint_list.RemoveTrapsFromBuffer(addr, buf, size);
1880}
1881
1882Status NativeProcessLinux::WriteMemory(lldb::addr_t addr, const void *buf,
1883 size_t size, size_t &bytes_written) {
1884 const unsigned char *src = static_cast<const unsigned char *>(buf);
1885 size_t remainder;
1886 Status error;
1887
1888 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY(1u << 4)));
1889 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "addr = {0}, buf = {1}, size = {2}", addr, buf
, size); } while (0)
;
1890
1891 for (bytes_written = 0; bytes_written < size; bytes_written += remainder) {
1892 remainder = size - bytes_written;
1893 remainder = remainder > k_ptrace_word_size ? k_ptrace_word_size : remainder;
1894
1895 if (remainder == k_ptrace_word_size) {
1896 unsigned long data = 0;
1897 memcpy(&data, src, k_ptrace_word_size);
1898
1899 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "[{0:x}]:{1:x}", addr, data); } while (0)
;
1900 error = NativeProcessLinux::PtraceWrapper(PTRACE_POKEDATA, GetID(),
1901 (void *)addr, (void *)data);
1902 if (error.Fail())
1903 return error;
1904 } else {
1905 unsigned char buff[8];
1906 size_t bytes_read;
1907 error = ReadMemory(addr, buff, k_ptrace_word_size, bytes_read);
1908 if (error.Fail())
1909 return error;
1910
1911 memcpy(buff, src, remainder);
1912
1913 size_t bytes_written_rec;
1914 error = WriteMemory(addr, buff, k_ptrace_word_size, bytes_written_rec);
1915 if (error.Fail())
1916 return error;
1917
1918 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~svn318211/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)
1919 *(unsigned long *)buff)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
;
1920 }
1921
1922 addr += k_ptrace_word_size;
1923 src += k_ptrace_word_size;
1924 }
1925 return error;
1926}
1927
1928Status NativeProcessLinux::GetSignalInfo(lldb::tid_t tid, void *siginfo) {
1929 return PtraceWrapper(PTRACE_GETSIGINFO, tid, nullptr, siginfo);
1930}
1931
1932Status NativeProcessLinux::GetEventMessage(lldb::tid_t tid,
1933 unsigned long *message) {
1934 return PtraceWrapper(PTRACE_GETEVENTMSG, tid, nullptr, message);
1935}
1936
1937Status NativeProcessLinux::Detach(lldb::tid_t tid) {
1938 if (tid == LLDB_INVALID_THREAD_ID0)
1939 return Status();
1940
1941 return PtraceWrapper(PTRACE_DETACH, tid);
1942}
1943
1944bool NativeProcessLinux::HasThreadNoLock(lldb::tid_t thread_id) {
1945 for (const auto &thread : m_threads) {
1946 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1946, __PRETTY_FUNCTION__))
;
1947 if (thread->GetID() == thread_id) {
1948 // We have this thread.
1949 return true;
1950 }
1951 }
1952
1953 // We don't have this thread.
1954 return false;
1955}
1956
1957bool NativeProcessLinux::StopTrackingThread(lldb::tid_t thread_id) {
1958 Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2));
1959 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid: {0})", thread_id); } while (0)
;
1960
1961 bool found = false;
1962 for (auto it = m_threads.begin(); it != m_threads.end(); ++it) {
1963 if (*it && ((*it)->GetID() == thread_id)) {
1964 m_threads.erase(it);
1965 found = true;
1966 break;
1967 }
1968 }
1969
1970 if (found)
1971 StopTracingForThread(thread_id);
1972 SignalIfAllThreadsStopped();
1973 return found;
1974}
1975
1976NativeThreadLinux &NativeProcessLinux::AddThread(lldb::tid_t thread_id) {
1977 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2)));
1978 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} adding thread with tid {1}", GetID()
, thread_id); } while (0)
;
1979
1980 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1981, __PRETTY_FUNCTION__))
1981 "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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 1981, __PRETTY_FUNCTION__))
;
1982
1983 // If this is the first thread, save it as the current thread
1984 if (m_threads.empty())
1985 SetCurrentThreadID(thread_id);
1986
1987 m_threads.push_back(llvm::make_unique<NativeThreadLinux>(*this, thread_id));
1988
1989 if (m_pt_proces_trace_id != LLDB_INVALID_UID(18446744073709551615UL)) {
1990 auto traceMonitor = ProcessorTraceMonitor::Create(
1991 GetID(), thread_id, m_pt_process_trace_config, true);
1992 if (traceMonitor) {
1993 m_pt_traced_thread_group.insert(thread_id);
1994 m_processor_trace_monitor.insert(
1995 std::make_pair(thread_id, std::move(*traceMonitor)));
1996 } else {
1997 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "failed to start trace on thread {0}", thread_id
); } while (0)
;
1998 Status error(traceMonitor.takeError());
1999 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "error {0}", error); } while (0)
;
2000 }
2001 }
2002
2003 return static_cast<NativeThreadLinux &>(*m_threads.back());
2004}
2005
2006Status
2007NativeProcessLinux::FixupBreakpointPCAsNeeded(NativeThreadLinux &thread) {
2008 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_BREAKPOINTS(1u << 7)));
2009
2010 Status error;
2011
2012 // Find out the size of a breakpoint (might depend on where we are in the
2013 // code).
2014 NativeRegisterContext &context = thread.GetRegisterContext();
2015
2016 uint32_t breakpoint_size = 0;
2017 error = GetSoftwareBreakpointPCOffset(breakpoint_size);
2018 if (error.Fail()) {
2019 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "GetBreakpointSize() failed: {0}", error); } while
(0)
;
2020 return error;
2021 } else
2022 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "breakpoint size: {0}", breakpoint_size); } while
(0)
;
2023
2024 // First try probing for a breakpoint at a software breakpoint location: PC -
2025 // breakpoint size.
2026 const lldb::addr_t initial_pc_addr = context.GetPCfromBreakpointLocation();
2027 lldb::addr_t breakpoint_addr = initial_pc_addr;
2028 if (breakpoint_size > 0) {
2029 // Do not allow breakpoint probe to wrap around.
2030 if (breakpoint_addr >= breakpoint_size)
2031 breakpoint_addr -= breakpoint_size;
2032 }
2033
2034 // Check if we stopped because of a breakpoint.
2035 NativeBreakpointSP breakpoint_sp;
2036 error = m_breakpoint_list.GetBreakpoint(breakpoint_addr, breakpoint_sp);
2037 if (!error.Success() || !breakpoint_sp) {
2038 // We didn't find one at a software probe location. Nothing to do.
2039 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
2040 "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~svn318211/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)
2041 "adjustment: {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
2042 GetID(), breakpoint_addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
;
2043 return Status();
2044 }
2045
2046 // If the breakpoint is not a software breakpoint, nothing to do.
2047 if (!breakpoint_sp->IsSoftwareBreakpoint()) {
2048 LLDB_LOG(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
2049 log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
2050 "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~svn318211/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)
2051 GetID(), breakpoint_addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
;
2052 return Status();
2053 }
2054
2055 //
2056 // We have a software breakpoint and need to adjust the PC.
2057 //
2058
2059 // Sanity check.
2060 if (breakpoint_size == 0) {
2061 // Nothing to do! How did we get here?
2062 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
2063 "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~svn318211/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)
2064 "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~svn318211/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)
2065 GetID(), breakpoint_addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
;
2066 return Status();
2067 }
2068
2069 // Change the program counter.
2070 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~svn318211/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)
2071 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~svn318211/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)
;
2072
2073 error = context.SetPC(breakpoint_addr);
2074 if (error.Fail()) {
2075 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}: failed to set PC: {2}", GetID
(), thread.GetID(), error); } while (0)
2076 thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid {0} tid {1}: failed to set PC: {2}", GetID
(), thread.GetID(), error); } while (0)
;
2077 return error;
2078 }
2079
2080 return error;
2081}
2082
2083Status NativeProcessLinux::GetLoadedModuleFileSpec(const char *module_path,
2084 FileSpec &file_spec) {
2085 Status error = PopulateMemoryRegionCache();
2086 if (error.Fail())
2087 return error;
2088
2089 FileSpec module_file_spec(module_path, true);
2090
2091 file_spec.Clear();
2092 for (const auto &it : m_mem_region_cache) {
2093 if (it.second.GetFilename() == module_file_spec.GetFilename()) {
2094 file_spec = it.second;
2095 return Status();
2096 }
2097 }
2098 return Status("Module file (%s) not found in /proc/%" PRIu64"l" "u" "/maps file!",
2099 module_file_spec.GetFilename().AsCString(), GetID());
2100}
2101
2102Status NativeProcessLinux::GetFileLoadAddress(const llvm::StringRef &file_name,
2103 lldb::addr_t &load_addr) {
2104 load_addr = LLDB_INVALID_ADDRESS(18446744073709551615UL);
2105 Status error = PopulateMemoryRegionCache();
2106 if (error.Fail())
2107 return error;
2108
2109 FileSpec file(file_name, false);
2110 for (const auto &it : m_mem_region_cache) {
2111 if (it.second == file) {
2112 load_addr = it.first.GetRange().GetRangeBase();
2113 return Status();
2114 }
2115 }
2116 return Status("No load address found for specified file.");
2117}
2118
2119NativeThreadLinux *NativeProcessLinux::GetThreadByID(lldb::tid_t tid) {
2120 return static_cast<NativeThreadLinux *>(
2121 NativeProcessProtocol::GetThreadByID(tid));
2122}
2123
2124Status NativeProcessLinux::ResumeThread(NativeThreadLinux &thread,
2125 lldb::StateType state, int signo) {
2126 Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2));
2127 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid: {0}", thread.GetID()); } while (0)
;
2128
2129 // Before we do the resume below, first check if we have a pending
2130 // stop notification that is currently waiting for
2131 // all threads to stop. This is potentially a buggy situation since
2132 // we're ostensibly waiting for threads to stop before we send out the
2133 // pending notification, and here we are resuming one before we send
2134 // out the pending stop notification.
2135 if (m_pending_notification_tid != LLDB_INVALID_THREAD_ID0) {
2136 LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
2137 "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~svn318211/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)
2138 "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~svn318211/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)
2139 "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~svn318211/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)
2140 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~svn318211/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)
;
2141 }
2142
2143 // Request a resume. We expect this to be synchronous and the system
2144 // to reflect it is running after this completes.
2145 switch (state) {
2146 case eStateRunning: {
2147 const auto resume_result = thread.Resume(signo);
2148 if (resume_result.Success())
2149 SetState(eStateRunning, true);
2150 return resume_result;
2151 }
2152 case eStateStepping: {
2153 const auto step_result = thread.SingleStep(signo);
2154 if (step_result.Success())
2155 SetState(eStateRunning, true);
2156 return step_result;
2157 }
2158 default:
2159 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Unhandled state {0}.", state); } while (0)
;
2160 llvm_unreachable("Unhandled state for resume")::llvm::llvm_unreachable_internal("Unhandled state for resume"
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, 2160)
;
2161 }
2162}
2163
2164//===----------------------------------------------------------------------===//
2165
2166void NativeProcessLinux::StopRunningThreads(const lldb::tid_t triggering_tid) {
2167 Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2));
2168 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to process event: (triggering_tid: {0})"
, triggering_tid); } while (0)
2169 triggering_tid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "about to process event: (triggering_tid: {0})"
, triggering_tid); } while (0)
;
2170
2171 m_pending_notification_tid = triggering_tid;
2172
2173 // Request a stop for all the thread stops that need to be stopped
2174 // and are not already known to be stopped.
2175 for (const auto &thread : m_threads) {
2176 if (StateIsRunningState(thread->GetState()))
2177 static_cast<NativeThreadLinux *>(thread.get())->RequestStop();
2178 }
2179
2180 SignalIfAllThreadsStopped();
2181 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "event processing done"); } while (0)
;
2182}
2183
2184void NativeProcessLinux::SignalIfAllThreadsStopped() {
2185 if (m_pending_notification_tid == LLDB_INVALID_THREAD_ID0)
2186 return; // No pending notification. Nothing to do.
2187
2188 for (const auto &thread_sp : m_threads) {
2189 if (StateIsRunningState(thread_sp->GetState()))
2190 return; // Some threads are still running. Don't signal yet.
2191 }
2192
2193 // We have a pending notification and all threads have stopped.
2194 Log *log(
2195 GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1) | LIBLLDB_LOG_BREAKPOINTS(1u << 5)));
2196
2197 // Clear any temporary breakpoints we used to implement software single
2198 // stepping.
2199 for (const auto &thread_info : m_threads_stepping_with_breakpoint) {
2200 Status error = RemoveBreakpoint(thread_info.second);
2201 if (error.Fail())
2202 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0} remove stepping breakpoint: {1}", thread_info
.first, error); } while (0)
2203 thread_info.first, error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "pid = {0} remove stepping breakpoint: {1}", thread_info
.first, error); } while (0)
;
2204 }
2205 m_threads_stepping_with_breakpoint.clear();
2206
2207 // Notify the delegate about the stop
2208 SetCurrentThreadID(m_pending_notification_tid);
2209 SetState(StateType::eStateStopped, true);
2210 m_pending_notification_tid = LLDB_INVALID_THREAD_ID0;
2211}
2212
2213void NativeProcessLinux::ThreadWasCreated(NativeThreadLinux &thread) {
2214 Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2));
2215 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "tid: {0}", thread.GetID()); } while (0)
;
2216
2217 if (m_pending_notification_tid != LLDB_INVALID_THREAD_ID0 &&
2218 StateIsRunningState(thread.GetState())) {
2219 // We will need to wait for this new thread to stop as well before firing
2220 // the
2221 // notification.
2222 thread.RequestStop();
2223 }
2224}
2225
2226void NativeProcessLinux::SigchldHandler() {
2227 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1)));
2228 // Process all pending waitpid notifications.
2229 while (true) {
2230 int status = -1;
2231 ::pid_t wait_pid = llvm::sys::RetryAfterSignal(-1, ::waitpid, -1, &status,
2232 __WALL0x40000000 | __WNOTHREAD0x20000000 | WNOHANG1);
2233
2234 if (wait_pid == 0)
2235 break; // We are done.
2236
2237 if (wait_pid == -1) {
2238 Status error(errno(*__errno_location ()), eErrorTypePOSIX);
2239 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "waitpid (-1, &status, _) failed: {0}", error
); } while (0)
;
2240 break;
2241 }
2242
2243 WaitStatus wait_status = WaitStatus::Decode(status);
2244 bool exited = wait_status.type == WaitStatus::Exit ||
2245 (wait_status.type == WaitStatus::Signal &&
2246 wait_pid == static_cast<::pid_t>(GetID()));
2247
2248 LLDB_LOG(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
2249 log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
2250 "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~svn318211/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)
2251 wait_pid, wait_status, exited)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
;
2252
2253 MonitorCallback(wait_pid, exited, wait_status);
2254 }
2255}
2256
2257// Wrapper for ptrace to catch errors and log calls.
2258// Note that ptrace sets errno on error because -1 can be a valid result (i.e.
2259// for PTRACE_PEEK*)
2260Status NativeProcessLinux::PtraceWrapper(int req, lldb::pid_t pid, void *addr,
2261 void *data, size_t data_size,
2262 long *result) {
2263 Status error;
2264 long int ret;
2265
2266 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2267
2268 PtraceDisplayBytes(req, data, data_size);
2269
2270 errno(*__errno_location ()) = 0;
2271 if (req == PTRACE_GETREGSETPTRACE_GETREGSET || req == PTRACE_SETREGSETPTRACE_SETREGSET)
2272 ret = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid),
2273 *(unsigned int *)addr, data);
2274 else
2275 ret = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid),
2276 addr, data);
2277
2278 if (ret == -1)
2279 error.SetErrorToErrno();
2280
2281 if (result)
2282 *result = ret;
2283
2284 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~svn318211/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)
2285 data_size, ret)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/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)
;
2286
2287 PtraceDisplayBytes(req, data, data_size);
2288
2289 if (error.Fail())
2290 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "ptrace() failed: {0}", error); } while (0)
;
2291
2292 return error;
2293}
2294
2295llvm::Expected<ProcessorTraceMonitor &>
2296NativeProcessLinux::LookupProcessorTraceInstance(lldb::user_id_t traceid,
2297 lldb::tid_t thread) {
2298 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2299 if (thread == LLDB_INVALID_THREAD_ID0 && traceid == m_pt_proces_trace_id) {
2300 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "thread not specified: {0}", traceid); } while
(0)
;
2301 return Status("tracing not active thread not specified").ToError();
2302 }
2303
2304 for (auto& iter : m_processor_trace_monitor) {
2305 if (traceid == iter.second->GetTraceID() &&
2306 (thread == iter.first || thread == LLDB_INVALID_THREAD_ID0))
2307 return *(iter.second);
2308 }
2309
2310 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid not being traced: {0}", traceid); } while
(0)
;
2311 return Status("tracing not active for this thread").ToError();
2312}
2313
2314Status NativeProcessLinux::GetMetaData(lldb::user_id_t traceid,
2315 lldb::tid_t thread,
2316 llvm::MutableArrayRef<uint8_t> &buffer,
2317 size_t offset) {
2318 TraceOptions trace_options;
2319 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2320 Status error;
2321
2322 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid {0}", traceid); } while (0)
;
2323
2324 auto perf_monitor = LookupProcessorTraceInstance(traceid, thread);
2325 if (!perf_monitor) {
2326 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid not being traced: {0}", traceid); } while
(0)
;
2327 buffer = buffer.slice(buffer.size());
2328 error = perf_monitor.takeError();
2329 return error;
2330 }
2331 return (*perf_monitor).ReadPerfTraceData(buffer, offset);
2332}
2333
2334Status NativeProcessLinux::GetData(lldb::user_id_t traceid, lldb::tid_t thread,
2335 llvm::MutableArrayRef<uint8_t> &buffer,
2336 size_t offset) {
2337 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2338 Status error;
2339
2340 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid {0}", traceid); } while (0)
;
2341
2342 auto perf_monitor = LookupProcessorTraceInstance(traceid, thread);
2343 if (!perf_monitor) {
2344 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid not being traced: {0}", traceid); } while
(0)
;
2345 buffer = buffer.slice(buffer.size());
2346 error = perf_monitor.takeError();
2347 return error;
2348 }
2349 return (*perf_monitor).ReadPerfTraceAux(buffer, offset);
2350}
2351
2352Status NativeProcessLinux::GetTraceConfig(lldb::user_id_t traceid,
2353 TraceOptions &config) {
2354 Status error;
2355 if (config.getThreadID() == LLDB_INVALID_THREAD_ID0 &&
2
Calling 'TraceOptions::getThreadID'
3
Returning from 'TraceOptions::getThreadID'
4
Assuming the condition is true
5
Taking true branch
2356 m_pt_proces_trace_id == traceid) {
2357 if (m_pt_proces_trace_id == LLDB_INVALID_UID(18446744073709551615UL)) {
6
Assuming the condition is true
7
Taking true branch
2358 error.SetErrorString("tracing not active for this process");
2359 return error;
2360 }
2361 config = m_pt_process_trace_config;
2362 } else {
2363 auto perf_monitor =
2364 LookupProcessorTraceInstance(traceid, config.getThreadID());
2365 if (!perf_monitor) {
2366 error = perf_monitor.takeError();
2367 return error;
2368 }
2369 error = (*perf_monitor).GetTraceConfig(config);
2370 }
2371 return error;
2372}
2373
2374lldb::user_id_t
2375NativeProcessLinux::StartTraceGroup(const TraceOptions &config,
2376 Status &error) {
2377
2378 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2379 if (config.getType() != TraceType::eTraceTypeProcessorTrace)
2380 return LLDB_INVALID_UID(18446744073709551615UL);
2381
2382 if (m_pt_proces_trace_id != LLDB_INVALID_UID(18446744073709551615UL)) {
2383 error.SetErrorString("tracing already active on this process");
2384 return m_pt_proces_trace_id;
2385 }
2386
2387 for (const auto &thread_sp : m_threads) {
2388 if (auto traceInstance = ProcessorTraceMonitor::Create(
2389 GetID(), thread_sp->GetID(), config, true)) {
2390 m_pt_traced_thread_group.insert(thread_sp->GetID());
2391 m_processor_trace_monitor.insert(
2392 std::make_pair(thread_sp->GetID(), std::move(*traceInstance)));
2393 }
2394 }
2395
2396 m_pt_process_trace_config = config;
2397 error = ProcessorTraceMonitor::GetCPUType(m_pt_process_trace_config);
2398
2399 // Trace on Complete process will have traceid of 0
2400 m_pt_proces_trace_id = 0;
2401
2402 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Process Trace ID {0}", m_pt_proces_trace_id)
; } while (0)
;
2403 return m_pt_proces_trace_id;
2404}
2405
2406lldb::user_id_t NativeProcessLinux::StartTrace(const TraceOptions &config,
2407 Status &error) {
2408 if (config.getType() != TraceType::eTraceTypeProcessorTrace)
2409 return NativeProcessProtocol::StartTrace(config, error);
2410
2411 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2412
2413 lldb::tid_t threadid = config.getThreadID();
2414
2415 if (threadid == LLDB_INVALID_THREAD_ID0)
2416 return StartTraceGroup(config, error);
2417
2418 auto thread_sp = GetThreadByID(threadid);
2419 if (!thread_sp) {
2420 // Thread not tracked by lldb so don't trace.
2421 error.SetErrorString("invalid thread id");
2422 return LLDB_INVALID_UID(18446744073709551615UL);
2423 }
2424
2425 const auto &iter = m_processor_trace_monitor.find(threadid);
2426 if (iter != m_processor_trace_monitor.end()) {
2427 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Thread already being traced"); } while (0)
;
2428 error.SetErrorString("tracing already active on this thread");
2429 return LLDB_INVALID_UID(18446744073709551615UL);
2430 }
2431
2432 auto traceMonitor =
2433 ProcessorTraceMonitor::Create(GetID(), threadid, config, false);
2434 if (!traceMonitor) {
2435 error = traceMonitor.takeError();
2436 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "error {0}", error); } while (0)
;
2437 return LLDB_INVALID_UID(18446744073709551615UL);
2438 }
2439 lldb::user_id_t ret_trace_id = (*traceMonitor)->GetTraceID();
2440 m_processor_trace_monitor.insert(
2441 std::make_pair(threadid, std::move(*traceMonitor)));
2442 return ret_trace_id;
2443}
2444
2445Status NativeProcessLinux::StopTracingForThread(lldb::tid_t thread) {
2446 Status error;
2447 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2448 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Thread {0}", thread); } while (0)
;
2449
2450 const auto& iter = m_processor_trace_monitor.find(thread);
2451 if (iter == m_processor_trace_monitor.end()) {
2452 error.SetErrorString("tracing not active for this thread");
2453 return error;
2454 }
2455
2456 if (iter->second->GetTraceID() == m_pt_proces_trace_id) {
2457 // traceid maps to the whole process so we have to erase it from the
2458 // thread group.
2459 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid maps to process"); } while (0)
;
2460 m_pt_traced_thread_group.erase(thread);
2461 }
2462 m_processor_trace_monitor.erase(iter);
2463
2464 return error;
2465}
2466
2467Status NativeProcessLinux::StopTrace(lldb::user_id_t traceid,
2468 lldb::tid_t thread) {
2469 Status error;
2470
2471 TraceOptions trace_options;
2472 trace_options.setThreadID(thread);
2473 error = NativeProcessLinux::GetTraceConfig(traceid, trace_options);
1
Calling 'NativeProcessLinux::GetTraceConfig'
8
Returning from 'NativeProcessLinux::GetTraceConfig'
2474
2475 if (error.Fail())
9
Assuming the condition is false
10
Taking false branch
2476 return error;
2477
2478 switch (trace_options.getType()) {
11
Calling 'TraceOptions::getType'
2479 case lldb::TraceType::eTraceTypeProcessorTrace:
2480 if (traceid == m_pt_proces_trace_id &&
2481 thread == LLDB_INVALID_THREAD_ID0)
2482 StopProcessorTracingOnProcess();
2483 else
2484 error = StopProcessorTracingOnThread(traceid, thread);
2485 break;
2486 default:
2487 error.SetErrorString("trace not supported");
2488 break;
2489 }
2490
2491 return error;
2492}
2493
2494void NativeProcessLinux::StopProcessorTracingOnProcess() {
2495 for (auto thread_id_iter : m_pt_traced_thread_group)
2496 m_processor_trace_monitor.erase(thread_id_iter);
2497 m_pt_traced_thread_group.clear();
2498 m_pt_proces_trace_id = LLDB_INVALID_UID(18446744073709551615UL);
2499}
2500
2501Status NativeProcessLinux::StopProcessorTracingOnThread(lldb::user_id_t traceid,
2502 lldb::tid_t thread) {
2503 Status error;
2504 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5)));
2505
2506 if (thread == LLDB_INVALID_THREAD_ID0) {
2507 for (auto& iter : m_processor_trace_monitor) {
2508 if (iter.second->GetTraceID() == traceid) {
2509 // Stopping a trace instance for an individual thread
2510 // hence there will only be one traceid that can match.
2511 m_processor_trace_monitor.erase(iter.first);
2512 return error;
2513 }
2514 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Trace ID {0}", iter.second->GetTraceID())
; } while (0)
;
2515 }
2516
2517 LLDB_LOG(log, "Invalid TraceID")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Invalid TraceID"); } while (0)
;
2518 error.SetErrorString("invalid trace id");
2519 return error;
2520 }
2521
2522 // thread is specified so we can use find function on the map.
2523 const auto& iter = m_processor_trace_monitor.find(thread);
2524 if (iter == m_processor_trace_monitor.end()) {
2525 // thread not found in our map.
2526 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "thread not being traced"); } while (0)
;
2527 error.SetErrorString("tracing not active for this thread");
2528 return error;
2529 }
2530 if (iter->second->GetTraceID() != traceid) {
2531 // traceid did not match so it has to be invalid.
2532 LLDB_LOG(log, "Invalid TraceID")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "Invalid TraceID"); } while (0)
;
2533 error.SetErrorString("invalid trace id");
2534 return error;
2535 }
2536
2537 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "UID - {0} , Thread -{1}", traceid, thread); }
while (0)
;
2538
2539 if (traceid == m_pt_proces_trace_id) {
2540 // traceid maps to the whole process so we have to erase it from the
2541 // thread group.
2542 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~svn318211/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp"
, __FUNCTION__, "traceid maps to process"); } while (0)
;
2543 m_pt_traced_thread_group.erase(thread);
2544 }
2545 m_processor_trace_monitor.erase(iter);
2546
2547 return error;
2548}

/build/llvm-toolchain-snapshot-6.0~svn318211/tools/lldb/include/lldb/Utility/TraceOptions.h

1//===-- TraceOptions.h ------------------------------------------*- 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#ifndef liblldb_TraceOptions_h_
11#define liblldb_TraceOptions_h_
12
13#include "lldb/lldb-defines.h"
14#include "lldb/lldb-enumerations.h"
15
16#include "lldb/Utility/StructuredData.h"
17
18namespace lldb_private {
19class TraceOptions {
20public:
21 TraceOptions() : m_trace_params(new StructuredData::Dictionary()) {}
22
23 const StructuredData::DictionarySP &getTraceParams() const {
24 return m_trace_params;
25 }
26
27 lldb::TraceType getType() const { return m_type; }
12
Undefined or garbage value returned to caller
28
29 uint64_t getTraceBufferSize() const { return m_trace_buffer_size; }
30
31 uint64_t getMetaDataBufferSize() const { return m_meta_data_buffer_size; }
32
33 void setTraceParams(const StructuredData::DictionarySP &dict_obj) {
34 m_trace_params = dict_obj;
35 }
36
37 void setType(lldb::TraceType type) { m_type = type; }
38
39 void setTraceBufferSize(uint64_t size) { m_trace_buffer_size = size; }
40
41 void setMetaDataBufferSize(uint64_t size) { m_meta_data_buffer_size = size; }
42
43 void setThreadID(lldb::tid_t thread_id) { m_thread_id = thread_id; }
44
45 lldb::tid_t getThreadID() const { return m_thread_id; }
46
47private:
48 lldb::TraceType m_type;
49 uint64_t m_trace_buffer_size;
50 uint64_t m_meta_data_buffer_size;
51 lldb::tid_t m_thread_id;
52
53 /// m_trace_params is meant to hold any custom parameters
54 /// apart from meta buffer size and trace size.
55 /// The interpretation of such parameters is left to
56 /// the lldb-server.
57 StructuredData::DictionarySP m_trace_params;
58};
59}
60
61#endif // liblldb_TraceOptions_h_