File: | tools/lldb/include/lldb/Utility/TraceOptions.h |
Warning: | line 27, column 37 Undefined or garbage value returned to caller |
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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/Host/Host.h" | |||
29 | #include "lldb/Host/HostProcess.h" | |||
30 | #include "lldb/Host/PseudoTerminal.h" | |||
31 | #include "lldb/Host/ThreadLauncher.h" | |||
32 | #include "lldb/Host/common/NativeBreakpoint.h" | |||
33 | #include "lldb/Host/common/NativeRegisterContext.h" | |||
34 | #include "lldb/Host/linux/Ptrace.h" | |||
35 | #include "lldb/Host/linux/Uio.h" | |||
36 | #include "lldb/Host/posix/ProcessLauncherPosixFork.h" | |||
37 | #include "lldb/Symbol/ObjectFile.h" | |||
38 | #include "lldb/Target/Process.h" | |||
39 | #include "lldb/Target/ProcessLaunchInfo.h" | |||
40 | #include "lldb/Target/Target.h" | |||
41 | #include "lldb/Utility/LLDBAssert.h" | |||
42 | #include "lldb/Utility/RegisterValue.h" | |||
43 | #include "lldb/Utility/State.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 | ||||
66 | using namespace lldb; | |||
67 | using namespace lldb_private; | |||
68 | using namespace lldb_private::process_linux; | |||
69 | using namespace llvm; | |||
70 | ||||
71 | // Private bits we only need internally. | |||
72 | ||||
73 | static 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "syscall process_vm_readv failed (error: {0}). Fast memory " "reads disabled.", llvm::sys::StrError()); } while (0); | |||
101 | }); | |||
102 | ||||
103 | return is_supported; | |||
104 | } | |||
105 | ||||
106 | namespace { | |||
107 | void 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "arg {0}: '{1}'", i, *args); } while (0); | |||
131 | } | |||
132 | ||||
133 | void 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 | ||||
142 | void 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "PTRACE_SETREGSET {0}", buf.GetData()); } while ( 0); | |||
183 | break; | |||
184 | } | |||
185 | default: {} | |||
186 | } | |||
187 | } | |||
188 | ||||
189 | static constexpr unsigned k_ptrace_word_size = sizeof(void *); | |||
190 | static_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. | |||
196 | static 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 | ||||
217 | llvm::Expected<std::unique_ptr<NativeProcessProtocol>> | |||
218 | NativeProcessLinux::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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "inferior started, now in stopped state"); } while (0); | |||
247 | ||||
248 | ProcessInstanceInfo Info; | |||
249 | if (!Host::GetProcessInfo(pid, Info)) { | |||
250 | return llvm::make_error<StringError>("Cannot get process architecture", | |||
251 | llvm::inconvertibleErrorCode()); | |||
252 | } | |||
253 | ||||
254 | // Set the architecture to the exe architecture. | |||
255 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid = {0:x}, detected architecture {1}", pid, Info .GetArchitecture().GetArchitectureName()); } while (0) | |||
256 | Info.GetArchitecture().GetArchitectureName())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid = {0:x}, detected architecture {1}", pid, Info .GetArchitecture().GetArchitectureName()); } while (0); | |||
257 | ||||
258 | status = SetDefaultPtraceOpts(pid); | |||
259 | if (status.Fail()) { | |||
260 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to set default ptrace options: {0}", status ); } while (0); | |||
261 | return status.ToError(); | |||
262 | } | |||
263 | ||||
264 | return std::unique_ptr<NativeProcessLinux>(new NativeProcessLinux( | |||
265 | pid, launch_info.GetPTY().ReleaseMasterFileDescriptor(), native_delegate, | |||
266 | Info.GetArchitecture(), mainloop, {pid})); | |||
267 | } | |||
268 | ||||
269 | llvm::Expected<std::unique_ptr<NativeProcessProtocol>> | |||
270 | NativeProcessLinux::Factory::Attach( | |||
271 | lldb::pid_t pid, NativeProcessProtocol::NativeDelegate &native_delegate, | |||
272 | MainLoop &mainloop) const { | |||
273 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
274 | LLDB_LOG(log, "pid = {0:x}", pid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid = {0:x}", pid); } while (0); | |||
275 | ||||
276 | // Retrieve the architecture for the running process. | |||
277 | ProcessInstanceInfo Info; | |||
278 | if (!Host::GetProcessInfo(pid, Info)) { | |||
279 | return llvm::make_error<StringError>("Cannot get process architecture", | |||
280 | llvm::inconvertibleErrorCode()); | |||
281 | } | |||
282 | ||||
283 | auto tids_or = NativeProcessLinux::Attach(pid); | |||
284 | if (!tids_or) | |||
285 | return tids_or.takeError(); | |||
286 | ||||
287 | return std::unique_ptr<NativeProcessLinux>(new NativeProcessLinux( | |||
288 | pid, -1, native_delegate, Info.GetArchitecture(), mainloop, *tids_or)); | |||
289 | } | |||
290 | ||||
291 | // ----------------------------------------------------------------------------- | |||
292 | // Public Instance Methods | |||
293 | // ----------------------------------------------------------------------------- | |||
294 | ||||
295 | NativeProcessLinux::NativeProcessLinux(::pid_t pid, int terminal_fd, | |||
296 | NativeDelegate &delegate, | |||
297 | const ArchSpec &arch, MainLoop &mainloop, | |||
298 | llvm::ArrayRef<::pid_t> tids) | |||
299 | : NativeProcessProtocol(pid, terminal_fd, delegate), m_arch(arch) { | |||
300 | if (m_terminal_fd != -1) { | |||
301 | Status status = EnsureFDFlags(m_terminal_fd, O_NONBLOCK04000); | |||
302 | assert(status.Success())((status.Success()) ? static_cast<void> (0) : __assert_fail ("status.Success()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 302, __PRETTY_FUNCTION__)); | |||
303 | } | |||
304 | ||||
305 | Status status; | |||
306 | m_sigchld_handle = mainloop.RegisterSignal( | |||
307 | SIGCHLD17, [this](MainLoopBase &) { SigchldHandler(); }, status); | |||
308 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 308, __PRETTY_FUNCTION__)); | |||
309 | ||||
310 | for (const auto &tid : tids) { | |||
311 | NativeThreadLinux &thread = AddThread(tid); | |||
312 | thread.SetStoppedBySignal(SIGSTOP19); | |||
313 | ThreadWasCreated(thread); | |||
314 | } | |||
315 | ||||
316 | // Let our process instance know the thread has stopped. | |||
317 | SetCurrentThreadID(tids[0]); | |||
318 | SetState(StateType::eStateStopped, false); | |||
319 | ||||
320 | // Proccess any signals we received before installing our handler | |||
321 | SigchldHandler(); | |||
322 | } | |||
323 | ||||
324 | llvm::Expected<std::vector<::pid_t>> NativeProcessLinux::Attach(::pid_t pid) { | |||
325 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
326 | ||||
327 | Status status; | |||
328 | // Use a map to keep track of the threads which we have attached/need to | |||
329 | // attach. | |||
330 | Host::TidMap tids_to_attach; | |||
331 | while (Host::FindProcessThreads(pid, tids_to_attach)) { | |||
332 | for (Host::TidMap::iterator it = tids_to_attach.begin(); | |||
333 | it != tids_to_attach.end();) { | |||
334 | if (it->second == false) { | |||
335 | lldb::tid_t tid = it->first; | |||
336 | ||||
337 | // Attach to the requested process. | |||
338 | // An attach will cause the thread to stop with a SIGSTOP. | |||
339 | if ((status = PtraceWrapper(PTRACE_ATTACH, tid)).Fail()) { | |||
340 | // No such thread. The thread may have exited. More error handling | |||
341 | // may be needed. | |||
342 | if (status.GetError() == ESRCH3) { | |||
343 | it = tids_to_attach.erase(it); | |||
344 | continue; | |||
345 | } | |||
346 | return status.ToError(); | |||
347 | } | |||
348 | ||||
349 | int wpid = | |||
350 | llvm::sys::RetryAfterSignal(-1, ::waitpid, tid, nullptr, __WALL0x40000000); | |||
351 | // Need to use __WALL otherwise we receive an error with errno=ECHLD At | |||
352 | // this point we should have a thread stopped if waitpid succeeds. | |||
353 | if (wpid < 0) { | |||
354 | // No such thread. The thread may have exited. More error handling | |||
355 | // may be needed. | |||
356 | if (errno(*__errno_location ()) == ESRCH3) { | |||
357 | it = tids_to_attach.erase(it); | |||
358 | continue; | |||
359 | } | |||
360 | return llvm::errorCodeToError( | |||
361 | std::error_code(errno(*__errno_location ()), std::generic_category())); | |||
362 | } | |||
363 | ||||
364 | if ((status = SetDefaultPtraceOpts(tid)).Fail()) | |||
365 | return status.ToError(); | |||
366 | ||||
367 | LLDB_LOG(log, "adding tid = {0}", tid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "adding tid = {0}", tid); } while (0); | |||
368 | it->second = true; | |||
369 | } | |||
370 | ||||
371 | // move the loop forward | |||
372 | ++it; | |||
373 | } | |||
374 | } | |||
375 | ||||
376 | size_t tid_count = tids_to_attach.size(); | |||
377 | if (tid_count == 0) | |||
378 | return llvm::make_error<StringError>("No such process", | |||
379 | llvm::inconvertibleErrorCode()); | |||
380 | ||||
381 | std::vector<::pid_t> tids; | |||
382 | tids.reserve(tid_count); | |||
383 | for (const auto &p : tids_to_attach) | |||
384 | tids.push_back(p.first); | |||
385 | return std::move(tids); | |||
386 | } | |||
387 | ||||
388 | Status NativeProcessLinux::SetDefaultPtraceOpts(lldb::pid_t pid) { | |||
389 | long ptrace_opts = 0; | |||
390 | ||||
391 | // Have the child raise an event on exit. This is used to keep the child in | |||
392 | // limbo until it is destroyed. | |||
393 | ptrace_opts |= PTRACE_O_TRACEEXIT; | |||
394 | ||||
395 | // Have the tracer trace threads which spawn in the inferior process. | |||
396 | // TODO: if we want to support tracing the inferiors' child, add the | |||
397 | // appropriate ptrace flags here (PTRACE_O_TRACEFORK, PTRACE_O_TRACEVFORK) | |||
398 | ptrace_opts |= PTRACE_O_TRACECLONE; | |||
399 | ||||
400 | // Have the tracer notify us before execve returns (needed to disable legacy | |||
401 | // SIGTRAP generation) | |||
402 | ptrace_opts |= PTRACE_O_TRACEEXEC; | |||
403 | ||||
404 | return PtraceWrapper(PTRACE_SETOPTIONS, pid, nullptr, (void *)ptrace_opts); | |||
405 | } | |||
406 | ||||
407 | // Handles all waitpid events from the inferior process. | |||
408 | void NativeProcessLinux::MonitorCallback(lldb::pid_t pid, bool exited, | |||
409 | WaitStatus status) { | |||
410 | Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1))); | |||
411 | ||||
412 | // Certain activities differ based on whether the pid is the tid of the main | |||
413 | // thread. | |||
414 | const bool is_main_thread = (pid == GetID()); | |||
415 | ||||
416 | // Handle when the thread exits. | |||
417 | if (exited) { | |||
418 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "got exit signal({0}) , tid = {1} ({2} main thread), process " "state = {3}", signal, pid, is_main_thread ? "is" : "is not" , GetState()); } while (0) | |||
419 | "got exit signal({0}) , tid = {1} ({2} main thread), process "do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "got exit signal({0}) , tid = {1} ({2} main thread), process " "state = {3}", signal, pid, is_main_thread ? "is" : "is not" , GetState()); } while (0) | |||
420 | "state = {3}",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "got exit signal({0}) , tid = {1} ({2} main thread), process " "state = {3}", signal, pid, is_main_thread ? "is" : "is not" , GetState()); } while (0) | |||
421 | signal, pid, is_main_thread ? "is" : "is not", GetState())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "got exit signal({0}) , tid = {1} ({2} main thread), process " "state = {3}", signal, pid, is_main_thread ? "is" : "is not" , GetState()); } while (0); | |||
422 | ||||
423 | // This is a thread that exited. Ensure we're not tracking it anymore. | |||
424 | StopTrackingThread(pid); | |||
425 | ||||
426 | if (is_main_thread) { | |||
427 | // The main thread exited. We're done monitoring. Report to delegate. | |||
428 | SetExitStatus(status, true); | |||
429 | ||||
430 | // Notify delegate that our process has exited. | |||
431 | SetState(StateType::eStateExited, true); | |||
432 | } | |||
433 | return; | |||
434 | } | |||
435 | ||||
436 | siginfo_t info; | |||
437 | const auto info_err = GetSignalInfo(pid, &info); | |||
438 | auto thread_sp = GetThreadByID(pid); | |||
439 | ||||
440 | if (!thread_sp) { | |||
441 | // Normally, the only situation when we cannot find the thread is if we | |||
442 | // have just received a new thread notification. This is indicated by | |||
443 | // GetSignalInfo() returning si_code == SI_USER and si_pid == 0 | |||
444 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received notification about an unknown tid {0}." , pid); } while (0); | |||
445 | ||||
446 | if (info_err.Fail()) { | |||
447 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "(tid {0}) GetSignalInfo failed ({1}). " "Ingoring this notification." , pid, info_err); } while (0) | |||
448 | "(tid {0}) GetSignalInfo failed ({1}). "do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "(tid {0}) GetSignalInfo failed ({1}). " "Ingoring this notification." , pid, info_err); } while (0) | |||
449 | "Ingoring this notification.",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "(tid {0}) GetSignalInfo failed ({1}). " "Ingoring this notification." , pid, info_err); } while (0) | |||
450 | pid, info_err)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "(tid {0}) GetSignalInfo failed ({1}). " "Ingoring this notification." , pid, info_err); } while (0); | |||
451 | return; | |||
452 | } | |||
453 | ||||
454 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "tid {0}, si_code: {1}, si_pid: {2}", pid, info.si_code , info._sifields._kill.si_pid); } while (0) | |||
455 | info.si_pid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "tid {0}, si_code: {1}, si_pid: {2}", pid, info.si_code , info._sifields._kill.si_pid); } while (0); | |||
456 | ||||
457 | NativeThreadLinux &thread = AddThread(pid); | |||
458 | ||||
459 | // Resume the newly created thread. | |||
460 | ResumeThread(thread, eStateRunning, LLDB_INVALID_SIGNAL_NUMBER(2147483647)); | |||
461 | ThreadWasCreated(thread); | |||
462 | return; | |||
463 | } | |||
464 | ||||
465 | // Get details on the signal raised. | |||
466 | if (info_err.Success()) { | |||
467 | // We have retrieved the signal info. Dispatch appropriately. | |||
468 | if (info.si_signo == SIGTRAP5) | |||
469 | MonitorSIGTRAP(info, *thread_sp); | |||
470 | else | |||
471 | MonitorSignal(info, *thread_sp, exited); | |||
472 | } else { | |||
473 | if (info_err.GetError() == EINVAL22) { | |||
474 | // This is a group stop reception for this tid. We can reach here if we | |||
475 | // reinject SIGSTOP, SIGSTP, SIGTTIN or SIGTTOU into the tracee, | |||
476 | // triggering the group-stop mechanism. Normally receiving these would | |||
477 | // stop the process, pending a SIGCONT. Simulating this state in a | |||
478 | // debugger is hard and is generally not needed (one use case is | |||
479 | // debugging background task being managed by a shell). For general use, | |||
480 | // it is sufficient to stop the process in a signal-delivery stop which | |||
481 | // happens before the group stop. This done by MonitorSignal and works | |||
482 | // correctly for all signals. | |||
483 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received a group stop for pid {0} tid {1}. Transparent " "handling of group stops not supported, resuming the " "thread." , GetID(), pid); } while (0) | |||
484 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received a group stop for pid {0} tid {1}. Transparent " "handling of group stops not supported, resuming the " "thread." , GetID(), pid); } while (0) | |||
485 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received a group stop for pid {0} tid {1}. Transparent " "handling of group stops not supported, resuming the " "thread." , GetID(), pid); } while (0) | |||
486 | "thread.",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received a group stop for pid {0} tid {1}. Transparent " "handling of group stops not supported, resuming the " "thread." , GetID(), pid); } while (0) | |||
487 | GetID(), pid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received a group stop for pid {0} tid {1}. Transparent " "handling of group stops not supported, resuming the " "thread." , GetID(), pid); } while (0); | |||
488 | ResumeThread(*thread_sp, thread_sp->GetState(), | |||
489 | LLDB_INVALID_SIGNAL_NUMBER(2147483647)); | |||
490 | } else { | |||
491 | // ptrace(GETSIGINFO) failed (but not due to group-stop). | |||
492 | ||||
493 | // A return value of ESRCH means the thread/process is no longer on the | |||
494 | // system, so it was killed somehow outside of our control. Either way, | |||
495 | // we can't do anything with it anymore. | |||
496 | ||||
497 | // Stop tracking the metadata for the thread since it's entirely off the | |||
498 | // system now. | |||
499 | const bool thread_found = StopTrackingThread(pid); | |||
500 | ||||
501 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
502 | "GetSignalInfo failed: {0}, tid = {1}, signal = {2}, "do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
503 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
504 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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); | |||
505 | ||||
506 | if (is_main_thread) { | |||
507 | // Notify the delegate - our process is not available but appears to | |||
508 | // have been killed outside our control. Is eStateExited the right | |||
509 | // exit state in this case? | |||
510 | SetExitStatus(status, true); | |||
511 | SetState(StateType::eStateExited, true); | |||
512 | } else { | |||
513 | // This thread was pulled out from underneath us. Anything to do here? | |||
514 | // Do we want to do an all stop? | |||
515 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
516 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
517 | "tell delegate anything since thread disappeared out "do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
518 | "from underneath us",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
519 | GetID(), pid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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); | |||
520 | } | |||
521 | } | |||
522 | } | |||
523 | } | |||
524 | ||||
525 | void NativeProcessLinux::WaitForNewThread(::pid_t tid) { | |||
526 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
527 | ||||
528 | if (GetThreadByID(tid)) { | |||
529 | // We are already tracking the thread - we got the event on the new thread | |||
530 | // (see MonitorSignal) before this one. We are done. | |||
531 | return; | |||
532 | } | |||
533 | ||||
534 | // The thread is not tracked yet, let's wait for it to appear. | |||
535 | int status = -1; | |||
536 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received thread creation event for tid {0}. tid not tracked " "yet, waiting for thread to appear...", tid); } while (0) | |||
537 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received thread creation event for tid {0}. tid not tracked " "yet, waiting for thread to appear...", tid); } while (0) | |||
538 | "yet, waiting for thread to appear...",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received thread creation event for tid {0}. tid not tracked " "yet, waiting for thread to appear...", tid); } while (0) | |||
539 | tid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received thread creation event for tid {0}. tid not tracked " "yet, waiting for thread to appear...", tid); } while (0); | |||
540 | ::pid_t wait_pid = llvm::sys::RetryAfterSignal(-1, ::waitpid, tid, &status, __WALL0x40000000); | |||
541 | // Since we are waiting on a specific tid, this must be the creation event. | |||
542 | // But let's do some checks just in case. | |||
543 | if (wait_pid != tid) { | |||
544 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waiting for tid {0} failed. Assuming the thread has " "disappeared in the meantime", tid); } while (0) | |||
545 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waiting for tid {0} failed. Assuming the thread has " "disappeared in the meantime", tid); } while (0) | |||
546 | "disappeared in the meantime",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waiting for tid {0} failed. Assuming the thread has " "disappeared in the meantime", tid); } while (0) | |||
547 | tid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waiting for tid {0} failed. Assuming the thread has " "disappeared in the meantime", tid); } while (0); | |||
548 | // The only way I know of this could happen is if the whole process was | |||
549 | // SIGKILLed in the mean time. In any case, we can't do anything about that | |||
550 | // now. | |||
551 | return; | |||
552 | } | |||
553 | if (WIFEXITED(status)(((status) & 0x7f) == 0)) { | |||
554 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waiting for tid {0} returned an 'exited' event. Not " "tracking the thread.", tid); } while (0) | |||
555 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waiting for tid {0} returned an 'exited' event. Not " "tracking the thread.", tid); } while (0) | |||
556 | "tracking the thread.",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waiting for tid {0} returned an 'exited' event. Not " "tracking the thread.", tid); } while (0) | |||
557 | tid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waiting for tid {0} returned an 'exited' event. Not " "tracking the thread.", tid); } while (0); | |||
558 | // Also a very improbable event. | |||
559 | return; | |||
560 | } | |||
561 | ||||
562 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid = {0}: tracking new thread tid {1}", GetID() , tid); } while (0); | |||
563 | NativeThreadLinux &new_thread = AddThread(tid); | |||
564 | ||||
565 | ResumeThread(new_thread, eStateRunning, LLDB_INVALID_SIGNAL_NUMBER(2147483647)); | |||
566 | ThreadWasCreated(new_thread); | |||
567 | } | |||
568 | ||||
569 | void NativeProcessLinux::MonitorSIGTRAP(const siginfo_t &info, | |||
570 | NativeThreadLinux &thread) { | |||
571 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
572 | const bool is_main_thread = (thread.GetID() == GetID()); | |||
573 | ||||
574 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 574, __PRETTY_FUNCTION__)); | |||
575 | ||||
576 | switch (info.si_code) { | |||
577 | // TODO: these two cases are required if we want to support tracing of the | |||
578 | // inferiors' children. We'd need this to debug a monitor. case (SIGTRAP | | |||
579 | // (PTRACE_EVENT_FORK << 8)): case (SIGTRAP | (PTRACE_EVENT_VFORK << 8)): | |||
580 | ||||
581 | case (SIGTRAP5 | (PTRACE_EVENT_CLONE << 8)): { | |||
582 | // This is the notification on the parent thread which informs us of new | |||
583 | // thread creation. We don't want to do anything with the parent thread so | |||
584 | // we just resume it. In case we want to implement "break on thread | |||
585 | // creation" functionality, we would need to stop here. | |||
586 | ||||
587 | unsigned long event_message = 0; | |||
588 | if (GetEventMessage(thread.GetID(), &event_message).Fail()) { | |||
589 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} received thread creation event but " "GetEventMessage failed so we don't know the new tid" , thread.GetID()); } while (0) | |||
590 | "pid {0} received thread creation event but "do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} received thread creation event but " "GetEventMessage failed so we don't know the new tid" , thread.GetID()); } while (0) | |||
591 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} received thread creation event but " "GetEventMessage failed so we don't know the new tid" , thread.GetID()); } while (0) | |||
592 | thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} received thread creation event but " "GetEventMessage failed so we don't know the new tid" , thread.GetID()); } while (0); | |||
593 | } else | |||
594 | WaitForNewThread(event_message); | |||
595 | ||||
596 | ResumeThread(thread, thread.GetState(), LLDB_INVALID_SIGNAL_NUMBER(2147483647)); | |||
597 | break; | |||
598 | } | |||
599 | ||||
600 | case (SIGTRAP5 | (PTRACE_EVENT_EXEC << 8)): { | |||
601 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received exec event, code = {0}", info.si_code ^ 5); } while (0); | |||
602 | ||||
603 | // Exec clears any pending notifications. | |||
604 | m_pending_notification_tid = LLDB_INVALID_THREAD_ID0; | |||
605 | ||||
606 | // Remove all but the main thread here. Linux fork creates a new process | |||
607 | // which only copies the main thread. | |||
608 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "exec received, stop tracking all but main thread" ); } while (0); | |||
609 | ||||
610 | for (auto i = m_threads.begin(); i != m_threads.end();) { | |||
611 | if ((*i)->GetID() == GetID()) | |||
612 | i = m_threads.erase(i); | |||
613 | else | |||
614 | ++i; | |||
615 | } | |||
616 | assert(m_threads.size() == 1)((m_threads.size() == 1) ? static_cast<void> (0) : __assert_fail ("m_threads.size() == 1", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 616, __PRETTY_FUNCTION__)); | |||
617 | auto *main_thread = static_cast<NativeThreadLinux *>(m_threads[0].get()); | |||
618 | ||||
619 | SetCurrentThreadID(main_thread->GetID()); | |||
620 | main_thread->SetStoppedByExec(); | |||
621 | ||||
622 | // Tell coordinator about about the "new" (since exec) stopped main thread. | |||
623 | ThreadWasCreated(*main_thread); | |||
624 | ||||
625 | // Let our delegate know we have just exec'd. | |||
626 | NotifyDidExec(); | |||
627 | ||||
628 | // Let the process know we're stopped. | |||
629 | StopRunningThreads(main_thread->GetID()); | |||
630 | ||||
631 | break; | |||
632 | } | |||
633 | ||||
634 | case (SIGTRAP5 | (PTRACE_EVENT_EXIT << 8)): { | |||
635 | // The inferior process or one of its threads is about to exit. We don't | |||
636 | // want to do anything with the thread so we just resume it. In case we | |||
637 | // want to implement "break on thread exit" functionality, we would need to | |||
638 | // stop here. | |||
639 | ||||
640 | unsigned long data = 0; | |||
641 | if (GetEventMessage(thread.GetID(), &data).Fail()) | |||
642 | data = -1; | |||
643 | ||||
644 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
645 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
646 | "WIFSIGNALED={2}, pid = {3}, main_thread = {4}",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
647 | data, WIFEXITED(data), WIFSIGNALED(data), thread.GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
648 | is_main_thread)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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); | |||
649 | ||||
650 | ||||
651 | StateType state = thread.GetState(); | |||
652 | if (!StateIsRunningState(state)) { | |||
653 | // Due to a kernel bug, we may sometimes get this stop after the inferior | |||
654 | // gets a SIGKILL. This confuses our state tracking logic in | |||
655 | // ResumeThread(), since normally, we should not be receiving any ptrace | |||
656 | // events while the inferior is stopped. This makes sure that the | |||
657 | // inferior is resumed and exits normally. | |||
658 | state = eStateRunning; | |||
659 | } | |||
660 | ResumeThread(thread, state, LLDB_INVALID_SIGNAL_NUMBER(2147483647)); | |||
661 | ||||
662 | break; | |||
663 | } | |||
664 | ||||
665 | case 0: | |||
666 | case TRAP_TRACETRAP_TRACE: // We receive this on single stepping. | |||
667 | case TRAP_HWBKPT4: // We receive this on watchpoint hit | |||
668 | { | |||
669 | // If a watchpoint was hit, report it | |||
670 | uint32_t wp_index; | |||
671 | Status error = thread.GetRegisterContext().GetWatchpointHitIndex( | |||
672 | wp_index, (uintptr_t)info.si_addr_sifields._sigfault.si_addr); | |||
673 | if (error.Fail()) | |||
674 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for watchpoint hits, pid = " "{0}, error = {1}", thread.GetID(), error); } while (0) | |||
675 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for watchpoint hits, pid = " "{0}, error = {1}", thread.GetID(), error); } while (0) | |||
676 | "{0}, error = {1}",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for watchpoint hits, pid = " "{0}, error = {1}", thread.GetID(), error); } while (0) | |||
677 | thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for watchpoint hits, pid = " "{0}, error = {1}", thread.GetID(), error); } while (0); | |||
678 | if (wp_index != LLDB_INVALID_INDEX32(4294967295U)) { | |||
679 | MonitorWatchpoint(thread, wp_index); | |||
680 | break; | |||
681 | } | |||
682 | ||||
683 | // If a breakpoint was hit, report it | |||
684 | uint32_t bp_index; | |||
685 | error = thread.GetRegisterContext().GetHardwareBreakHitIndex( | |||
686 | bp_index, (uintptr_t)info.si_addr_sifields._sigfault.si_addr); | |||
687 | if (error.Fail()) | |||
688 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for hardware " "breakpoint hits, pid = {0}, error = {1}" , thread.GetID(), error); } while (0) | |||
689 | "breakpoint hits, pid = {0}, error = {1}",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for hardware " "breakpoint hits, pid = {0}, error = {1}" , thread.GetID(), error); } while (0) | |||
690 | thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for hardware " "breakpoint hits, pid = {0}, error = {1}" , thread.GetID(), error); } while (0); | |||
691 | if (bp_index != LLDB_INVALID_INDEX32(4294967295U)) { | |||
692 | MonitorBreakpoint(thread); | |||
693 | break; | |||
694 | } | |||
695 | ||||
696 | // Otherwise, report step over | |||
697 | MonitorTrace(thread); | |||
698 | break; | |||
699 | } | |||
700 | ||||
701 | case SI_KERNELSI_KERNEL: | |||
702 | #if defined __mips__ | |||
703 | // For mips there is no special signal for watchpoint So we check for | |||
704 | // watchpoint in kernel trap | |||
705 | { | |||
706 | // If a watchpoint was hit, report it | |||
707 | uint32_t wp_index; | |||
708 | Status error = thread.GetRegisterContext().GetWatchpointHitIndex( | |||
709 | wp_index, LLDB_INVALID_ADDRESS(18446744073709551615UL)); | |||
710 | if (error.Fail()) | |||
711 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for watchpoint hits, pid = " "{0}, error = {1}", thread.GetID(), error); } while (0) | |||
712 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for watchpoint hits, pid = " "{0}, error = {1}", thread.GetID(), error); } while (0) | |||
713 | "{0}, error = {1}",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for watchpoint hits, pid = " "{0}, error = {1}", thread.GetID(), error); } while (0) | |||
714 | thread.GetID(), error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received error while checking for watchpoint hits, pid = " "{0}, error = {1}", thread.GetID(), error); } while (0); | |||
715 | if (wp_index != LLDB_INVALID_INDEX32(4294967295U)) { | |||
716 | MonitorWatchpoint(thread, wp_index); | |||
717 | break; | |||
718 | } | |||
719 | } | |||
720 | // NO BREAK | |||
721 | #endif | |||
722 | case TRAP_BRKPTTRAP_BRKPT: | |||
723 | MonitorBreakpoint(thread); | |||
724 | break; | |||
725 | ||||
726 | case SIGTRAP5: | |||
727 | case (SIGTRAP5 | 0x80): | |||
728 | LLDB_LOG(do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming" , info.si_code, GetID(), thread.GetID()); } while (0) | |||
729 | log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming" , info.si_code, GetID(), thread.GetID()); } while (0) | |||
730 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming" , info.si_code, GetID(), thread.GetID()); } while (0) | |||
731 | info.si_code, GetID(), thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}, resuming" , info.si_code, GetID(), thread.GetID()); } while (0); | |||
732 | ||||
733 | // Ignore these signals until we know more about them. | |||
734 | ResumeThread(thread, thread.GetState(), LLDB_INVALID_SIGNAL_NUMBER(2147483647)); | |||
735 | break; | |||
736 | ||||
737 | default: | |||
738 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}" , info.si_code, GetID(), thread.GetID()); } while (0) | |||
739 | info.si_code, GetID(), thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received unknown SIGTRAP stop event ({0}, pid {1} tid {2}" , info.si_code, GetID(), thread.GetID()); } while (0); | |||
740 | MonitorSignal(info, thread, false); | |||
741 | break; | |||
742 | } | |||
743 | } | |||
744 | ||||
745 | void NativeProcessLinux::MonitorTrace(NativeThreadLinux &thread) { | |||
746 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
747 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received trace event, pid = {0}", thread.GetID() ); } while (0); | |||
748 | ||||
749 | // This thread is currently stopped. | |||
750 | thread.SetStoppedByTrace(); | |||
751 | ||||
752 | StopRunningThreads(thread.GetID()); | |||
753 | } | |||
754 | ||||
755 | void NativeProcessLinux::MonitorBreakpoint(NativeThreadLinux &thread) { | |||
756 | Log *log( | |||
757 | GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1) | LIBLLDB_LOG_BREAKPOINTS(1u << 5))); | |||
758 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received breakpoint event, pid = {0}", thread.GetID ()); } while (0); | |||
759 | ||||
760 | // Mark the thread as stopped at breakpoint. | |||
761 | thread.SetStoppedByBreakpoint(); | |||
762 | FixupBreakpointPCAsNeeded(thread); | |||
763 | ||||
764 | if (m_threads_stepping_with_breakpoint.find(thread.GetID()) != | |||
765 | m_threads_stepping_with_breakpoint.end()) | |||
766 | thread.SetStoppedByTrace(); | |||
767 | ||||
768 | StopRunningThreads(thread.GetID()); | |||
769 | } | |||
770 | ||||
771 | void NativeProcessLinux::MonitorWatchpoint(NativeThreadLinux &thread, | |||
772 | uint32_t wp_index) { | |||
773 | Log *log( | |||
774 | GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1) | LIBLLDB_LOG_WATCHPOINTS(1u << 6))); | |||
775 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received watchpoint event, pid = {0}, wp_index = {1}" , thread.GetID(), wp_index); } while (0) | |||
776 | thread.GetID(), wp_index)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received watchpoint event, pid = {0}, wp_index = {1}" , thread.GetID(), wp_index); } while (0); | |||
777 | ||||
778 | // Mark the thread as stopped at watchpoint. The address is at | |||
779 | // (lldb::addr_t)info->si_addr if we need it. | |||
780 | thread.SetStoppedByWatchpoint(wp_index); | |||
781 | ||||
782 | // We need to tell all other running threads before we notify the delegate | |||
783 | // about this stop. | |||
784 | StopRunningThreads(thread.GetID()); | |||
785 | } | |||
786 | ||||
787 | void NativeProcessLinux::MonitorSignal(const siginfo_t &info, | |||
788 | NativeThreadLinux &thread, bool exited) { | |||
789 | const int signo = info.si_signo; | |||
790 | const bool is_from_llgs = info.si_pid_sifields._kill.si_pid == getpid(); | |||
791 | ||||
792 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
793 | ||||
794 | // POSIX says that process behaviour is undefined after it ignores a SIGFPE, | |||
795 | // SIGILL, SIGSEGV, or SIGBUS *unless* that signal was generated by a kill(2) | |||
796 | // or raise(3). Similarly for tgkill(2) on Linux. | |||
797 | // | |||
798 | // IOW, user generated signals never generate what we consider to be a | |||
799 | // "crash". | |||
800 | // | |||
801 | // Similarly, ACK signals generated by this monitor. | |||
802 | ||||
803 | // Handle the signal. | |||
804 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, " "waitpid pid = {4})", Host::GetSignalAsCString(signo), signo , info.si_code, thread.GetID()); } while (0) | |||
805 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, " "waitpid pid = {4})", Host::GetSignalAsCString(signo), signo , info.si_code, thread.GetID()); } while (0) | |||
806 | "waitpid pid = {4})",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, " "waitpid pid = {4})", Host::GetSignalAsCString(signo), signo , info.si_code, thread.GetID()); } while (0) | |||
807 | Host::GetSignalAsCString(signo), signo, info.si_code,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, " "waitpid pid = {4})", Host::GetSignalAsCString(signo), signo , info.si_code, thread.GetID()); } while (0) | |||
808 | thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received signal {0} ({1}) with code {2}, (siginfo pid = {3}, " "waitpid pid = {4})", Host::GetSignalAsCString(signo), signo , info.si_code, thread.GetID()); } while (0); | |||
809 | ||||
810 | // Check for thread stop notification. | |||
811 | if (is_from_llgs && (info.si_code == SI_TKILLSI_TKILL) && (signo == SIGSTOP19)) { | |||
812 | // This is a tgkill()-based stop. | |||
813 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} tid {1}, thread stopped", GetID(), thread .GetID()); } while (0); | |||
814 | ||||
815 | // Check that we're not already marked with a stop reason. Note this thread | |||
816 | // really shouldn't already be marked as stopped - if we were, that would | |||
817 | // imply that the kernel signaled us with the thread stopping which we | |||
818 | // handled and marked as stopped, and that, without an intervening resume, | |||
819 | // we received another stop. It is more likely that we are missing the | |||
820 | // marking of a run state somewhere if we find that the thread was marked | |||
821 | // as stopped. | |||
822 | const StateType thread_state = thread.GetState(); | |||
823 | if (!StateIsStoppedState(thread_state, false)) { | |||
824 | // An inferior thread has stopped because of a SIGSTOP we have sent it. | |||
825 | // Generally, these are not important stops and we don't want to report | |||
826 | // them as they are just used to stop other threads when one thread (the | |||
827 | // one with the *real* stop reason) hits a breakpoint (watchpoint, | |||
828 | // etc...). However, in the case of an asynchronous Interrupt(), this | |||
829 | // *is* the real stop reason, so we leave the signal intact if this is | |||
830 | // the thread that was chosen as the triggering thread. | |||
831 | if (m_pending_notification_tid != LLDB_INVALID_THREAD_ID0) { | |||
832 | if (m_pending_notification_tid == thread.GetID()) | |||
833 | thread.SetStoppedBySignal(SIGSTOP19, &info); | |||
834 | else | |||
835 | thread.SetStoppedWithNoReason(); | |||
836 | ||||
837 | SetCurrentThreadID(thread.GetID()); | |||
838 | SignalIfAllThreadsStopped(); | |||
839 | } else { | |||
840 | // We can end up here if stop was initiated by LLGS but by this time a | |||
841 | // thread stop has occurred - maybe initiated by another event. | |||
842 | Status error = ResumeThread(thread, thread.GetState(), 0); | |||
843 | if (error.Fail()) | |||
844 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to resume thread {0}: {1}", thread.GetID( ), error); } while (0) | |||
845 | error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to resume thread {0}: {1}", thread.GetID( ), error); } while (0); | |||
846 | } | |||
847 | } else { | |||
848 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
849 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
850 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
851 | GetID(), thread.GetID(), thread_state)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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); | |||
852 | SignalIfAllThreadsStopped(); | |||
853 | } | |||
854 | ||||
855 | // Done handling. | |||
856 | return; | |||
857 | } | |||
858 | ||||
859 | // Check if debugger should stop at this signal or just ignore it and resume | |||
860 | // the inferior. | |||
861 | if (m_signals_to_ignore.find(signo) != m_signals_to_ignore.end()) { | |||
862 | ResumeThread(thread, thread.GetState(), signo); | |||
863 | return; | |||
864 | } | |||
865 | ||||
866 | // This thread is stopped. | |||
867 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "received signal {0}", Host::GetSignalAsCString(signo )); } while (0); | |||
868 | thread.SetStoppedBySignal(signo, &info); | |||
869 | ||||
870 | // Send a stop to the debugger after we get all other threads to stop. | |||
871 | StopRunningThreads(thread.GetID()); | |||
872 | } | |||
873 | ||||
874 | namespace { | |||
875 | ||||
876 | struct EmulatorBaton { | |||
877 | NativeProcessLinux &m_process; | |||
878 | NativeRegisterContext &m_reg_context; | |||
879 | ||||
880 | // eRegisterKindDWARF -> RegsiterValue | |||
881 | std::unordered_map<uint32_t, RegisterValue> m_register_values; | |||
882 | ||||
883 | EmulatorBaton(NativeProcessLinux &process, NativeRegisterContext ®_context) | |||
884 | : m_process(process), m_reg_context(reg_context) {} | |||
885 | }; | |||
886 | ||||
887 | } // anonymous namespace | |||
888 | ||||
889 | static size_t ReadMemoryCallback(EmulateInstruction *instruction, void *baton, | |||
890 | const EmulateInstruction::Context &context, | |||
891 | lldb::addr_t addr, void *dst, size_t length) { | |||
892 | EmulatorBaton *emulator_baton = static_cast<EmulatorBaton *>(baton); | |||
893 | ||||
894 | size_t bytes_read; | |||
895 | emulator_baton->m_process.ReadMemory(addr, dst, length, bytes_read); | |||
896 | return bytes_read; | |||
897 | } | |||
898 | ||||
899 | static bool ReadRegisterCallback(EmulateInstruction *instruction, void *baton, | |||
900 | const RegisterInfo *reg_info, | |||
901 | RegisterValue ®_value) { | |||
902 | EmulatorBaton *emulator_baton = static_cast<EmulatorBaton *>(baton); | |||
903 | ||||
904 | auto it = emulator_baton->m_register_values.find( | |||
905 | reg_info->kinds[eRegisterKindDWARF]); | |||
906 | if (it != emulator_baton->m_register_values.end()) { | |||
907 | reg_value = it->second; | |||
908 | return true; | |||
909 | } | |||
910 | ||||
911 | // The emulator only fill in the dwarf regsiter numbers (and in some case the | |||
912 | // generic register numbers). Get the full register info from the register | |||
913 | // context based on the dwarf register numbers. | |||
914 | const RegisterInfo *full_reg_info = | |||
915 | emulator_baton->m_reg_context.GetRegisterInfo( | |||
916 | eRegisterKindDWARF, reg_info->kinds[eRegisterKindDWARF]); | |||
917 | ||||
918 | Status error = | |||
919 | emulator_baton->m_reg_context.ReadRegister(full_reg_info, reg_value); | |||
920 | if (error.Success()) | |||
921 | return true; | |||
922 | ||||
923 | return false; | |||
924 | } | |||
925 | ||||
926 | static bool WriteRegisterCallback(EmulateInstruction *instruction, void *baton, | |||
927 | const EmulateInstruction::Context &context, | |||
928 | const RegisterInfo *reg_info, | |||
929 | const RegisterValue ®_value) { | |||
930 | EmulatorBaton *emulator_baton = static_cast<EmulatorBaton *>(baton); | |||
931 | emulator_baton->m_register_values[reg_info->kinds[eRegisterKindDWARF]] = | |||
932 | reg_value; | |||
933 | return true; | |||
934 | } | |||
935 | ||||
936 | static size_t WriteMemoryCallback(EmulateInstruction *instruction, void *baton, | |||
937 | const EmulateInstruction::Context &context, | |||
938 | lldb::addr_t addr, const void *dst, | |||
939 | size_t length) { | |||
940 | return length; | |||
941 | } | |||
942 | ||||
943 | static lldb::addr_t ReadFlags(NativeRegisterContext ®siter_context) { | |||
944 | const RegisterInfo *flags_info = regsiter_context.GetRegisterInfo( | |||
945 | eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS4); | |||
946 | return regsiter_context.ReadRegisterAsUnsigned(flags_info, | |||
947 | LLDB_INVALID_ADDRESS(18446744073709551615UL)); | |||
948 | } | |||
949 | ||||
950 | Status | |||
951 | NativeProcessLinux::SetupSoftwareSingleStepping(NativeThreadLinux &thread) { | |||
952 | Status error; | |||
953 | NativeRegisterContext& register_context = thread.GetRegisterContext(); | |||
954 | ||||
955 | std::unique_ptr<EmulateInstruction> emulator_ap( | |||
956 | EmulateInstruction::FindPlugin(m_arch, eInstructionTypePCModifying, | |||
957 | nullptr)); | |||
958 | ||||
959 | if (emulator_ap == nullptr) | |||
960 | return Status("Instruction emulator not found!"); | |||
961 | ||||
962 | EmulatorBaton baton(*this, register_context); | |||
963 | emulator_ap->SetBaton(&baton); | |||
964 | emulator_ap->SetReadMemCallback(&ReadMemoryCallback); | |||
965 | emulator_ap->SetReadRegCallback(&ReadRegisterCallback); | |||
966 | emulator_ap->SetWriteMemCallback(&WriteMemoryCallback); | |||
967 | emulator_ap->SetWriteRegCallback(&WriteRegisterCallback); | |||
968 | ||||
969 | if (!emulator_ap->ReadInstruction()) | |||
970 | return Status("Read instruction failed!"); | |||
971 | ||||
972 | bool emulation_result = | |||
973 | emulator_ap->EvaluateInstruction(eEmulateInstructionOptionAutoAdvancePC); | |||
974 | ||||
975 | const RegisterInfo *reg_info_pc = register_context.GetRegisterInfo( | |||
976 | eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC0); | |||
977 | const RegisterInfo *reg_info_flags = register_context.GetRegisterInfo( | |||
978 | eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS4); | |||
979 | ||||
980 | auto pc_it = | |||
981 | baton.m_register_values.find(reg_info_pc->kinds[eRegisterKindDWARF]); | |||
982 | auto flags_it = | |||
983 | baton.m_register_values.find(reg_info_flags->kinds[eRegisterKindDWARF]); | |||
984 | ||||
985 | lldb::addr_t next_pc; | |||
986 | lldb::addr_t next_flags; | |||
987 | if (emulation_result) { | |||
988 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 989, __PRETTY_FUNCTION__)) | |||
989 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 989, __PRETTY_FUNCTION__)); | |||
990 | next_pc = pc_it->second.GetAsUInt64(); | |||
991 | ||||
992 | if (flags_it != baton.m_register_values.end()) | |||
993 | next_flags = flags_it->second.GetAsUInt64(); | |||
994 | else | |||
995 | next_flags = ReadFlags(register_context); | |||
996 | } else if (pc_it == baton.m_register_values.end()) { | |||
997 | // Emulate instruction failed and it haven't changed PC. Advance PC with | |||
998 | // the size of the current opcode because the emulation of all | |||
999 | // PC modifying instruction should be successful. The failure most | |||
1000 | // likely caused by a not supported instruction which don't modify PC. | |||
1001 | next_pc = register_context.GetPC() + emulator_ap->GetOpcode().GetByteSize(); | |||
1002 | next_flags = ReadFlags(register_context); | |||
1003 | } else { | |||
1004 | // The instruction emulation failed after it modified the PC. It is an | |||
1005 | // unknown error where we can't continue because the next instruction is | |||
1006 | // modifying the PC but we don't know how. | |||
1007 | return Status("Instruction emulation failed unexpectedly."); | |||
1008 | } | |||
1009 | ||||
1010 | if (m_arch.GetMachine() == llvm::Triple::arm) { | |||
1011 | if (next_flags & 0x20) { | |||
1012 | // Thumb mode | |||
1013 | error = SetSoftwareBreakpoint(next_pc, 2); | |||
1014 | } else { | |||
1015 | // Arm mode | |||
1016 | error = SetSoftwareBreakpoint(next_pc, 4); | |||
1017 | } | |||
1018 | } else if (m_arch.GetMachine() == llvm::Triple::mips64 || | |||
1019 | m_arch.GetMachine() == llvm::Triple::mips64el || | |||
1020 | m_arch.GetMachine() == llvm::Triple::mips || | |||
1021 | m_arch.GetMachine() == llvm::Triple::mipsel || | |||
1022 | m_arch.GetMachine() == llvm::Triple::ppc64le) | |||
1023 | error = SetSoftwareBreakpoint(next_pc, 4); | |||
1024 | else { | |||
1025 | // No size hint is given for the next breakpoint | |||
1026 | error = SetSoftwareBreakpoint(next_pc, 0); | |||
1027 | } | |||
1028 | ||||
1029 | // If setting the breakpoint fails because next_pc is out of the address | |||
1030 | // space, ignore it and let the debugee segfault. | |||
1031 | if (error.GetError() == EIO5 || error.GetError() == EFAULT14) { | |||
1032 | return Status(); | |||
1033 | } else if (error.Fail()) | |||
1034 | return error; | |||
1035 | ||||
1036 | m_threads_stepping_with_breakpoint.insert({thread.GetID(), next_pc}); | |||
1037 | ||||
1038 | return Status(); | |||
1039 | } | |||
1040 | ||||
1041 | bool NativeProcessLinux::SupportHardwareSingleStepping() const { | |||
1042 | if (m_arch.GetMachine() == llvm::Triple::arm || | |||
1043 | m_arch.GetMachine() == llvm::Triple::mips64 || | |||
1044 | m_arch.GetMachine() == llvm::Triple::mips64el || | |||
1045 | m_arch.GetMachine() == llvm::Triple::mips || | |||
1046 | m_arch.GetMachine() == llvm::Triple::mipsel) | |||
1047 | return false; | |||
1048 | return true; | |||
1049 | } | |||
1050 | ||||
1051 | Status NativeProcessLinux::Resume(const ResumeActionList &resume_actions) { | |||
1052 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
1053 | LLDB_LOG(log, "pid {0}", GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0}", GetID()); } while (0); | |||
1054 | ||||
1055 | bool software_single_step = !SupportHardwareSingleStepping(); | |||
1056 | ||||
1057 | if (software_single_step) { | |||
1058 | for (const auto &thread : m_threads) { | |||
1059 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1059, __PRETTY_FUNCTION__)); | |||
1060 | ||||
1061 | const ResumeAction *const action = | |||
1062 | resume_actions.GetActionForThread(thread->GetID(), true); | |||
1063 | if (action == nullptr) | |||
1064 | continue; | |||
1065 | ||||
1066 | if (action->state == eStateStepping) { | |||
1067 | Status error = SetupSoftwareSingleStepping( | |||
1068 | static_cast<NativeThreadLinux &>(*thread)); | |||
1069 | if (error.Fail()) | |||
1070 | return error; | |||
1071 | } | |||
1072 | } | |||
1073 | } | |||
1074 | ||||
1075 | for (const auto &thread : m_threads) { | |||
1076 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1076, __PRETTY_FUNCTION__)); | |||
1077 | ||||
1078 | const ResumeAction *const action = | |||
1079 | resume_actions.GetActionForThread(thread->GetID(), true); | |||
1080 | ||||
1081 | if (action == nullptr) { | |||
1082 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "no action specified for pid {0} tid {1}", GetID( ), thread->GetID()); } while (0) | |||
1083 | thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "no action specified for pid {0} tid {1}", GetID( ), thread->GetID()); } while (0); | |||
1084 | continue; | |||
1085 | } | |||
1086 | ||||
1087 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "processing resume action state {0} for pid {1} tid {2}" , action->state, GetID(), thread->GetID()); } while (0) | |||
1088 | action->state, GetID(), thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "processing resume action state {0} for pid {1} tid {2}" , action->state, GetID(), thread->GetID()); } while (0); | |||
1089 | ||||
1090 | switch (action->state) { | |||
1091 | case eStateRunning: | |||
1092 | case eStateStepping: { | |||
1093 | // Run the thread, possibly feeding it the signal. | |||
1094 | const int signo = action->signal; | |||
1095 | ResumeThread(static_cast<NativeThreadLinux &>(*thread), action->state, | |||
1096 | signo); | |||
1097 | break; | |||
1098 | } | |||
1099 | ||||
1100 | case eStateSuspended: | |||
1101 | case eStateStopped: | |||
1102 | llvm_unreachable("Unexpected state")::llvm::llvm_unreachable_internal("Unexpected state", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1102); | |||
1103 | ||||
1104 | default: | |||
1105 | return Status("NativeProcessLinux::%s (): unexpected state %s specified " | |||
1106 | "for pid %" PRIu64"l" "u" ", tid %" PRIu64"l" "u", | |||
1107 | __FUNCTION__, StateAsCString(action->state), GetID(), | |||
1108 | thread->GetID()); | |||
1109 | } | |||
1110 | } | |||
1111 | ||||
1112 | return Status(); | |||
1113 | } | |||
1114 | ||||
1115 | Status NativeProcessLinux::Halt() { | |||
1116 | Status error; | |||
1117 | ||||
1118 | if (kill(GetID(), SIGSTOP19) != 0) | |||
1119 | error.SetErrorToErrno(); | |||
1120 | ||||
1121 | return error; | |||
1122 | } | |||
1123 | ||||
1124 | Status NativeProcessLinux::Detach() { | |||
1125 | Status error; | |||
1126 | ||||
1127 | // Stop monitoring the inferior. | |||
1128 | m_sigchld_handle.reset(); | |||
1129 | ||||
1130 | // Tell ptrace to detach from the process. | |||
1131 | if (GetID() == LLDB_INVALID_PROCESS_ID0) | |||
1132 | return error; | |||
1133 | ||||
1134 | for (const auto &thread : m_threads) { | |||
1135 | Status e = Detach(thread->GetID()); | |||
1136 | if (e.Fail()) | |||
1137 | error = | |||
1138 | e; // Save the error, but still attempt to detach from other threads. | |||
1139 | } | |||
1140 | ||||
1141 | m_processor_trace_monitor.clear(); | |||
1142 | m_pt_proces_trace_id = LLDB_INVALID_UID(18446744073709551615UL); | |||
1143 | ||||
1144 | return error; | |||
1145 | } | |||
1146 | ||||
1147 | Status NativeProcessLinux::Signal(int signo) { | |||
1148 | Status error; | |||
1149 | ||||
1150 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
1151 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "sending signal {0} ({1}) to pid {1}", signo, Host ::GetSignalAsCString(signo), GetID()); } while (0) | |||
1152 | Host::GetSignalAsCString(signo), GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "sending signal {0} ({1}) to pid {1}", signo, Host ::GetSignalAsCString(signo), GetID()); } while (0); | |||
1153 | ||||
1154 | if (kill(GetID(), signo)) | |||
1155 | error.SetErrorToErrno(); | |||
1156 | ||||
1157 | return error; | |||
1158 | } | |||
1159 | ||||
1160 | Status NativeProcessLinux::Interrupt() { | |||
1161 | // Pick a running thread (or if none, a not-dead stopped thread) as the | |||
1162 | // chosen thread that will be the stop-reason thread. | |||
1163 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
1164 | ||||
1165 | NativeThreadProtocol *running_thread = nullptr; | |||
1166 | NativeThreadProtocol *stopped_thread = nullptr; | |||
1167 | ||||
1168 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "selecting running thread for interrupt target"); } while (0); | |||
1169 | for (const auto &thread : m_threads) { | |||
1170 | // If we have a running or stepping thread, we'll call that the target of | |||
1171 | // the interrupt. | |||
1172 | const auto thread_state = thread->GetState(); | |||
1173 | if (thread_state == eStateRunning || thread_state == eStateStepping) { | |||
1174 | running_thread = thread.get(); | |||
1175 | break; | |||
1176 | } else if (!stopped_thread && StateIsStoppedState(thread_state, true)) { | |||
1177 | // Remember the first non-dead stopped thread. We'll use that as a | |||
1178 | // backup if there are no running threads. | |||
1179 | stopped_thread = thread.get(); | |||
1180 | } | |||
1181 | } | |||
1182 | ||||
1183 | if (!running_thread && !stopped_thread) { | |||
1184 | Status error("found no running/stepping or live stopped threads as target " | |||
1185 | "for interrupt"); | |||
1186 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "skipping due to error: {0}", error); } while (0); | |||
1187 | ||||
1188 | return error; | |||
1189 | } | |||
1190 | ||||
1191 | NativeThreadProtocol *deferred_signal_thread = | |||
1192 | running_thread ? running_thread : stopped_thread; | |||
1193 | ||||
1194 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} {1} tid {2} chosen for interrupt target" , GetID(), running_thread ? "running" : "stopped", deferred_signal_thread ->GetID()); } while (0) | |||
1195 | running_thread ? "running" : "stopped",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} {1} tid {2} chosen for interrupt target" , GetID(), running_thread ? "running" : "stopped", deferred_signal_thread ->GetID()); } while (0) | |||
1196 | deferred_signal_thread->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} {1} tid {2} chosen for interrupt target" , GetID(), running_thread ? "running" : "stopped", deferred_signal_thread ->GetID()); } while (0); | |||
1197 | ||||
1198 | StopRunningThreads(deferred_signal_thread->GetID()); | |||
1199 | ||||
1200 | return Status(); | |||
1201 | } | |||
1202 | ||||
1203 | Status NativeProcessLinux::Kill() { | |||
1204 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
1205 | LLDB_LOG(log, "pid {0}", GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0}", GetID()); } while (0); | |||
1206 | ||||
1207 | Status error; | |||
1208 | ||||
1209 | switch (m_state) { | |||
1210 | case StateType::eStateInvalid: | |||
1211 | case StateType::eStateExited: | |||
1212 | case StateType::eStateCrashed: | |||
1213 | case StateType::eStateDetached: | |||
1214 | case StateType::eStateUnloaded: | |||
1215 | // Nothing to do - the process is already dead. | |||
1216 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "ignored for PID {0} due to current state: {1}", GetID (), m_state); } while (0) | |||
1217 | m_state)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "ignored for PID {0} due to current state: {1}", GetID (), m_state); } while (0); | |||
1218 | return error; | |||
1219 | ||||
1220 | case StateType::eStateConnected: | |||
1221 | case StateType::eStateAttaching: | |||
1222 | case StateType::eStateLaunching: | |||
1223 | case StateType::eStateStopped: | |||
1224 | case StateType::eStateRunning: | |||
1225 | case StateType::eStateStepping: | |||
1226 | case StateType::eStateSuspended: | |||
1227 | // We can try to kill a process in these states. | |||
1228 | break; | |||
1229 | } | |||
1230 | ||||
1231 | if (kill(GetID(), SIGKILL9) != 0) { | |||
1232 | error.SetErrorToErrno(); | |||
1233 | return error; | |||
1234 | } | |||
1235 | ||||
1236 | return error; | |||
1237 | } | |||
1238 | ||||
1239 | static Status | |||
1240 | ParseMemoryRegionInfoFromProcMapsLine(llvm::StringRef &maps_line, | |||
1241 | MemoryRegionInfo &memory_region_info) { | |||
1242 | memory_region_info.Clear(); | |||
1243 | ||||
1244 | StringExtractor line_extractor(maps_line); | |||
1245 | ||||
1246 | // Format: {address_start_hex}-{address_end_hex} perms offset dev inode | |||
1247 | // pathname perms: rwxp (letter is present if set, '-' if not, final | |||
1248 | // character is p=private, s=shared). | |||
1249 | ||||
1250 | // Parse out the starting address | |||
1251 | lldb::addr_t start_address = line_extractor.GetHexMaxU64(false, 0); | |||
1252 | ||||
1253 | // Parse out hyphen separating start and end address from range. | |||
1254 | if (!line_extractor.GetBytesLeft() || (line_extractor.GetChar() != '-')) | |||
1255 | return Status( | |||
1256 | "malformed /proc/{pid}/maps entry, missing dash between address range"); | |||
1257 | ||||
1258 | // Parse out the ending address | |||
1259 | lldb::addr_t end_address = line_extractor.GetHexMaxU64(false, start_address); | |||
1260 | ||||
1261 | // Parse out the space after the address. | |||
1262 | if (!line_extractor.GetBytesLeft() || (line_extractor.GetChar() != ' ')) | |||
1263 | return Status( | |||
1264 | "malformed /proc/{pid}/maps entry, missing space after range"); | |||
1265 | ||||
1266 | // Save the range. | |||
1267 | memory_region_info.GetRange().SetRangeBase(start_address); | |||
1268 | memory_region_info.GetRange().SetRangeEnd(end_address); | |||
1269 | ||||
1270 | // Any memory region in /proc/{pid}/maps is by definition mapped into the | |||
1271 | // process. | |||
1272 | memory_region_info.SetMapped(MemoryRegionInfo::OptionalBool::eYes); | |||
1273 | ||||
1274 | // Parse out each permission entry. | |||
1275 | if (line_extractor.GetBytesLeft() < 4) | |||
1276 | return Status("malformed /proc/{pid}/maps entry, missing some portion of " | |||
1277 | "permissions"); | |||
1278 | ||||
1279 | // Handle read permission. | |||
1280 | const char read_perm_char = line_extractor.GetChar(); | |||
1281 | if (read_perm_char == 'r') | |||
1282 | memory_region_info.SetReadable(MemoryRegionInfo::OptionalBool::eYes); | |||
1283 | else if (read_perm_char == '-') | |||
1284 | memory_region_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo); | |||
1285 | else | |||
1286 | return Status("unexpected /proc/{pid}/maps read permission char"); | |||
1287 | ||||
1288 | // Handle write permission. | |||
1289 | const char write_perm_char = line_extractor.GetChar(); | |||
1290 | if (write_perm_char == 'w') | |||
1291 | memory_region_info.SetWritable(MemoryRegionInfo::OptionalBool::eYes); | |||
1292 | else if (write_perm_char == '-') | |||
1293 | memory_region_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo); | |||
1294 | else | |||
1295 | return Status("unexpected /proc/{pid}/maps write permission char"); | |||
1296 | ||||
1297 | // Handle execute permission. | |||
1298 | const char exec_perm_char = line_extractor.GetChar(); | |||
1299 | if (exec_perm_char == 'x') | |||
1300 | memory_region_info.SetExecutable(MemoryRegionInfo::OptionalBool::eYes); | |||
1301 | else if (exec_perm_char == '-') | |||
1302 | memory_region_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo); | |||
1303 | else | |||
1304 | return Status("unexpected /proc/{pid}/maps exec permission char"); | |||
1305 | ||||
1306 | line_extractor.GetChar(); // Read the private bit | |||
1307 | line_extractor.SkipSpaces(); // Skip the separator | |||
1308 | line_extractor.GetHexMaxU64(false, 0); // Read the offset | |||
1309 | line_extractor.GetHexMaxU64(false, 0); // Read the major device number | |||
1310 | line_extractor.GetChar(); // Read the device id separator | |||
1311 | line_extractor.GetHexMaxU64(false, 0); // Read the major device number | |||
1312 | line_extractor.SkipSpaces(); // Skip the separator | |||
1313 | line_extractor.GetU64(0, 10); // Read the inode number | |||
1314 | ||||
1315 | line_extractor.SkipSpaces(); | |||
1316 | const char *name = line_extractor.Peek(); | |||
1317 | if (name) | |||
1318 | memory_region_info.SetName(name); | |||
1319 | ||||
1320 | return Status(); | |||
1321 | } | |||
1322 | ||||
1323 | Status NativeProcessLinux::GetMemoryRegionInfo(lldb::addr_t load_addr, | |||
1324 | MemoryRegionInfo &range_info) { | |||
1325 | // FIXME review that the final memory region returned extends to the end of | |||
1326 | // the virtual address space, | |||
1327 | // with no perms if it is not mapped. | |||
1328 | ||||
1329 | // Use an approach that reads memory regions from /proc/{pid}/maps. Assume | |||
1330 | // proc maps entries are in ascending order. | |||
1331 | // FIXME assert if we find differently. | |||
1332 | ||||
1333 | if (m_supports_mem_region == LazyBool::eLazyBoolNo) { | |||
1334 | // We're done. | |||
1335 | return Status("unsupported"); | |||
1336 | } | |||
1337 | ||||
1338 | Status error = PopulateMemoryRegionCache(); | |||
1339 | if (error.Fail()) { | |||
1340 | return error; | |||
1341 | } | |||
1342 | ||||
1343 | lldb::addr_t prev_base_address = 0; | |||
1344 | ||||
1345 | // FIXME start by finding the last region that is <= target address using | |||
1346 | // binary search. Data is sorted. | |||
1347 | // There can be a ton of regions on pthreads apps with lots of threads. | |||
1348 | for (auto it = m_mem_region_cache.begin(); it != m_mem_region_cache.end(); | |||
1349 | ++it) { | |||
1350 | MemoryRegionInfo &proc_entry_info = it->first; | |||
1351 | ||||
1352 | // Sanity check assumption that /proc/{pid}/maps entries are ascending. | |||
1353 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1354, __PRETTY_FUNCTION__)) | |||
1354 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1354, __PRETTY_FUNCTION__)); | |||
1355 | prev_base_address = proc_entry_info.GetRange().GetRangeBase(); | |||
1356 | UNUSED_IF_ASSERT_DISABLED(prev_base_address)((void)(prev_base_address)); | |||
1357 | ||||
1358 | // If the target address comes before this entry, indicate distance to next | |||
1359 | // region. | |||
1360 | if (load_addr < proc_entry_info.GetRange().GetRangeBase()) { | |||
1361 | range_info.GetRange().SetRangeBase(load_addr); | |||
1362 | range_info.GetRange().SetByteSize( | |||
1363 | proc_entry_info.GetRange().GetRangeBase() - load_addr); | |||
1364 | range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo); | |||
1365 | range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo); | |||
1366 | range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo); | |||
1367 | range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo); | |||
1368 | ||||
1369 | return error; | |||
1370 | } else if (proc_entry_info.GetRange().Contains(load_addr)) { | |||
1371 | // The target address is within the memory region we're processing here. | |||
1372 | range_info = proc_entry_info; | |||
1373 | return error; | |||
1374 | } | |||
1375 | ||||
1376 | // The target memory address comes somewhere after the region we just | |||
1377 | // parsed. | |||
1378 | } | |||
1379 | ||||
1380 | // If we made it here, we didn't find an entry that contained the given | |||
1381 | // address. Return the load_addr as start and the amount of bytes betwwen | |||
1382 | // load address and the end of the memory as size. | |||
1383 | range_info.GetRange().SetRangeBase(load_addr); | |||
1384 | range_info.GetRange().SetRangeEnd(LLDB_INVALID_ADDRESS(18446744073709551615UL)); | |||
1385 | range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo); | |||
1386 | range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo); | |||
1387 | range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo); | |||
1388 | range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo); | |||
1389 | return error; | |||
1390 | } | |||
1391 | ||||
1392 | Status NativeProcessLinux::PopulateMemoryRegionCache() { | |||
1393 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
1394 | ||||
1395 | // If our cache is empty, pull the latest. There should always be at least | |||
1396 | // one memory region if memory region handling is supported. | |||
1397 | if (!m_mem_region_cache.empty()) { | |||
1398 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "reusing {0} cached memory region entries", m_mem_region_cache .size()); } while (0) | |||
1399 | m_mem_region_cache.size())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "reusing {0} cached memory region entries", m_mem_region_cache .size()); } while (0); | |||
1400 | return Status(); | |||
1401 | } | |||
1402 | ||||
1403 | auto BufferOrError = getProcFile(GetID(), "maps"); | |||
1404 | if (!BufferOrError) { | |||
1405 | m_supports_mem_region = LazyBool::eLazyBoolNo; | |||
1406 | return BufferOrError.getError(); | |||
1407 | } | |||
1408 | StringRef Rest = BufferOrError.get()->getBuffer(); | |||
1409 | while (! Rest.empty()) { | |||
1410 | StringRef Line; | |||
1411 | std::tie(Line, Rest) = Rest.split('\n'); | |||
1412 | MemoryRegionInfo info; | |||
1413 | const Status parse_error = | |||
1414 | ParseMemoryRegionInfoFromProcMapsLine(Line, info); | |||
1415 | if (parse_error.Fail()) { | |||
1416 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to parse proc maps line '{0}': {1}", Line , parse_error); } while (0) | |||
1417 | parse_error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to parse proc maps line '{0}': {1}", Line , parse_error); } while (0); | |||
1418 | m_supports_mem_region = LazyBool::eLazyBoolNo; | |||
1419 | return parse_error; | |||
1420 | } | |||
1421 | m_mem_region_cache.emplace_back( | |||
1422 | info, FileSpec(info.GetName().GetCString(), true)); | |||
1423 | } | |||
1424 | ||||
1425 | if (m_mem_region_cache.empty()) { | |||
1426 | // No entries after attempting to read them. This shouldn't happen if | |||
1427 | // /proc/{pid}/maps is supported. Assume we don't support map entries via | |||
1428 | // procfs. | |||
1429 | m_supports_mem_region = LazyBool::eLazyBoolNo; | |||
1430 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to find any procfs maps entries, assuming no support " "for memory region metadata retrieval"); } while (0) | |||
1431 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to find any procfs maps entries, assuming no support " "for memory region metadata retrieval"); } while (0) | |||
1432 | "for memory region metadata retrieval")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to find any procfs maps entries, assuming no support " "for memory region metadata retrieval"); } while (0); | |||
1433 | return Status("not supported"); | |||
1434 | } | |||
1435 | ||||
1436 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "read {0} memory region entries from /proc/{1}/maps" , m_mem_region_cache.size(), GetID()); } while (0) | |||
1437 | m_mem_region_cache.size(), GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "read {0} memory region entries from /proc/{1}/maps" , m_mem_region_cache.size(), GetID()); } while (0); | |||
1438 | ||||
1439 | // We support memory retrieval, remember that. | |||
1440 | m_supports_mem_region = LazyBool::eLazyBoolYes; | |||
1441 | return Status(); | |||
1442 | } | |||
1443 | ||||
1444 | void NativeProcessLinux::DoStopIDBumped(uint32_t newBumpId) { | |||
1445 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
1446 | LLDB_LOG(log, "newBumpId={0}", newBumpId)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "newBumpId={0}", newBumpId); } while (0); | |||
1447 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "clearing {0} entries from memory region cache", m_mem_region_cache .size()); } while (0) | |||
1448 | m_mem_region_cache.size())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "clearing {0} entries from memory region cache", m_mem_region_cache .size()); } while (0); | |||
1449 | m_mem_region_cache.clear(); | |||
1450 | } | |||
1451 | ||||
1452 | Status NativeProcessLinux::AllocateMemory(size_t size, uint32_t permissions, | |||
1453 | lldb::addr_t &addr) { | |||
1454 | // FIXME implementing this requires the equivalent of | |||
1455 | // InferiorCallPOSIX::InferiorCallMmap, which depends on functional ThreadPlans | |||
1456 | // working with Native*Protocol. | |||
1457 | #if 1 | |||
1458 | return Status("not implemented yet"); | |||
1459 | #else | |||
1460 | addr = LLDB_INVALID_ADDRESS(18446744073709551615UL); | |||
1461 | ||||
1462 | unsigned prot = 0; | |||
1463 | if (permissions & lldb::ePermissionsReadable) | |||
1464 | prot |= eMmapProtRead; | |||
1465 | if (permissions & lldb::ePermissionsWritable) | |||
1466 | prot |= eMmapProtWrite; | |||
1467 | if (permissions & lldb::ePermissionsExecutable) | |||
1468 | prot |= eMmapProtExec; | |||
1469 | ||||
1470 | // TODO implement this directly in NativeProcessLinux | |||
1471 | // (and lift to NativeProcessPOSIX if/when that class is refactored out). | |||
1472 | if (InferiorCallMmap(this, addr, 0, size, prot, | |||
1473 | eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) { | |||
1474 | m_addr_to_mmap_size[addr] = size; | |||
1475 | return Status(); | |||
1476 | } else { | |||
1477 | addr = LLDB_INVALID_ADDRESS(18446744073709551615UL); | |||
1478 | return Status("unable to allocate %" PRIu64"l" "u" | |||
1479 | " bytes of memory with permissions %s", | |||
1480 | size, GetPermissionsAsCString(permissions)); | |||
1481 | } | |||
1482 | #endif | |||
1483 | } | |||
1484 | ||||
1485 | Status NativeProcessLinux::DeallocateMemory(lldb::addr_t addr) { | |||
1486 | // FIXME see comments in AllocateMemory - required lower-level | |||
1487 | // bits not in place yet (ThreadPlans) | |||
1488 | return Status("not implemented"); | |||
1489 | } | |||
1490 | ||||
1491 | lldb::addr_t NativeProcessLinux::GetSharedLibraryInfoAddress() { | |||
1492 | // punt on this for now | |||
1493 | return LLDB_INVALID_ADDRESS(18446744073709551615UL); | |||
1494 | } | |||
1495 | ||||
1496 | size_t NativeProcessLinux::UpdateThreads() { | |||
1497 | // The NativeProcessLinux monitoring threads are always up to date with | |||
1498 | // respect to thread state and they keep the thread list populated properly. | |||
1499 | // All this method needs to do is return the thread count. | |||
1500 | return m_threads.size(); | |||
1501 | } | |||
1502 | ||||
1503 | Status NativeProcessLinux::SetBreakpoint(lldb::addr_t addr, uint32_t size, | |||
1504 | bool hardware) { | |||
1505 | if (hardware) | |||
1506 | return SetHardwareBreakpoint(addr, size); | |||
1507 | else | |||
1508 | return SetSoftwareBreakpoint(addr, size); | |||
1509 | } | |||
1510 | ||||
1511 | Status NativeProcessLinux::RemoveBreakpoint(lldb::addr_t addr, bool hardware) { | |||
1512 | if (hardware) | |||
1513 | return RemoveHardwareBreakpoint(addr); | |||
1514 | else | |||
1515 | return NativeProcessProtocol::RemoveBreakpoint(addr); | |||
1516 | } | |||
1517 | ||||
1518 | llvm::Expected<llvm::ArrayRef<uint8_t>> | |||
1519 | NativeProcessLinux::GetSoftwareBreakpointTrapOpcode(size_t size_hint) { | |||
1520 | // The ARM reference recommends the use of 0xe7fddefe and 0xdefe but the | |||
1521 | // linux kernel does otherwise. | |||
1522 | static const uint8_t g_arm_opcode[] = {0xf0, 0x01, 0xf0, 0xe7}; | |||
1523 | static const uint8_t g_thumb_opcode[] = {0x01, 0xde}; | |||
1524 | ||||
1525 | switch (GetArchitecture().GetMachine()) { | |||
1526 | case llvm::Triple::arm: | |||
1527 | switch (size_hint) { | |||
1528 | case 2: | |||
1529 | return llvm::makeArrayRef(g_thumb_opcode); | |||
1530 | case 4: | |||
1531 | return llvm::makeArrayRef(g_arm_opcode); | |||
1532 | default: | |||
1533 | return llvm::createStringError(llvm::inconvertibleErrorCode(), | |||
1534 | "Unrecognised trap opcode size hint!"); | |||
1535 | } | |||
1536 | default: | |||
1537 | return NativeProcessProtocol::GetSoftwareBreakpointTrapOpcode(size_hint); | |||
1538 | } | |||
1539 | } | |||
1540 | ||||
1541 | Status NativeProcessLinux::ReadMemory(lldb::addr_t addr, void *buf, size_t size, | |||
1542 | size_t &bytes_read) { | |||
1543 | if (ProcessVmReadvSupported()) { | |||
1544 | // The process_vm_readv path is about 50 times faster than ptrace api. We | |||
1545 | // want to use this syscall if it is supported. | |||
1546 | ||||
1547 | const ::pid_t pid = GetID(); | |||
1548 | ||||
1549 | struct iovec local_iov, remote_iov; | |||
1550 | local_iov.iov_base = buf; | |||
1551 | local_iov.iov_len = size; | |||
1552 | remote_iov.iov_base = reinterpret_cast<void *>(addr); | |||
1553 | remote_iov.iov_len = size; | |||
1554 | ||||
1555 | bytes_read = process_vm_readv(pid, &local_iov, 1, &remote_iov, 1, 0); | |||
1556 | const bool success = bytes_read == size; | |||
1557 | ||||
1558 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
1559 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
1560 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
1561 | "address {1:x}: {2}",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
1562 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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); | |||
1563 | ||||
1564 | if (success) | |||
1565 | return Status(); | |||
1566 | // else the call failed for some reason, let's retry the read using ptrace | |||
1567 | // api. | |||
1568 | } | |||
1569 | ||||
1570 | unsigned char *dst = static_cast<unsigned char *>(buf); | |||
1571 | size_t remainder; | |||
1572 | long data; | |||
1573 | ||||
1574 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY(1u << 4))); | |||
1575 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "addr = {0}, buf = {1}, size = {2}", addr, buf, size ); } while (0); | |||
1576 | ||||
1577 | for (bytes_read = 0; bytes_read < size; bytes_read += remainder) { | |||
1578 | Status error = NativeProcessLinux::PtraceWrapper( | |||
1579 | PTRACE_PEEKDATA, GetID(), (void *)addr, nullptr, 0, &data); | |||
1580 | if (error.Fail()) | |||
1581 | return error; | |||
1582 | ||||
1583 | remainder = size - bytes_read; | |||
1584 | remainder = remainder > k_ptrace_word_size ? k_ptrace_word_size : remainder; | |||
1585 | ||||
1586 | // Copy the data into our buffer | |||
1587 | memcpy(dst, &data, remainder); | |||
1588 | ||||
1589 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "[{0:x}]:{1:x}", addr, data); } while (0); | |||
1590 | addr += k_ptrace_word_size; | |||
1591 | dst += k_ptrace_word_size; | |||
1592 | } | |||
1593 | return Status(); | |||
1594 | } | |||
1595 | ||||
1596 | Status NativeProcessLinux::WriteMemory(lldb::addr_t addr, const void *buf, | |||
1597 | size_t size, size_t &bytes_written) { | |||
1598 | const unsigned char *src = static_cast<const unsigned char *>(buf); | |||
1599 | size_t remainder; | |||
1600 | Status error; | |||
1601 | ||||
1602 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY(1u << 4))); | |||
1603 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "addr = {0}, buf = {1}, size = {2}", addr, buf, size ); } while (0); | |||
1604 | ||||
1605 | for (bytes_written = 0; bytes_written < size; bytes_written += remainder) { | |||
1606 | remainder = size - bytes_written; | |||
1607 | remainder = remainder > k_ptrace_word_size ? k_ptrace_word_size : remainder; | |||
1608 | ||||
1609 | if (remainder == k_ptrace_word_size) { | |||
1610 | unsigned long data = 0; | |||
1611 | memcpy(&data, src, k_ptrace_word_size); | |||
1612 | ||||
1613 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "[{0:x}]:{1:x}", addr, data); } while (0); | |||
1614 | error = NativeProcessLinux::PtraceWrapper(PTRACE_POKEDATA, GetID(), | |||
1615 | (void *)addr, (void *)data); | |||
1616 | if (error.Fail()) | |||
1617 | return error; | |||
1618 | } else { | |||
1619 | unsigned char buff[8]; | |||
1620 | size_t bytes_read; | |||
1621 | error = ReadMemory(addr, buff, k_ptrace_word_size, bytes_read); | |||
1622 | if (error.Fail()) | |||
1623 | return error; | |||
1624 | ||||
1625 | memcpy(buff, src, remainder); | |||
1626 | ||||
1627 | size_t bytes_written_rec; | |||
1628 | error = WriteMemory(addr, buff, k_ptrace_word_size, bytes_written_rec); | |||
1629 | if (error.Fail()) | |||
1630 | return error; | |||
1631 | ||||
1632 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "[{0:x}]:{1:x} ({2:x})", addr, *(const unsigned long *)src, *(unsigned long *)buff); } while (0) | |||
1633 | *(unsigned long *)buff)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "[{0:x}]:{1:x} ({2:x})", addr, *(const unsigned long *)src, *(unsigned long *)buff); } while (0); | |||
1634 | } | |||
1635 | ||||
1636 | addr += k_ptrace_word_size; | |||
1637 | src += k_ptrace_word_size; | |||
1638 | } | |||
1639 | return error; | |||
1640 | } | |||
1641 | ||||
1642 | Status NativeProcessLinux::GetSignalInfo(lldb::tid_t tid, void *siginfo) { | |||
1643 | return PtraceWrapper(PTRACE_GETSIGINFO, tid, nullptr, siginfo); | |||
1644 | } | |||
1645 | ||||
1646 | Status NativeProcessLinux::GetEventMessage(lldb::tid_t tid, | |||
1647 | unsigned long *message) { | |||
1648 | return PtraceWrapper(PTRACE_GETEVENTMSG, tid, nullptr, message); | |||
1649 | } | |||
1650 | ||||
1651 | Status NativeProcessLinux::Detach(lldb::tid_t tid) { | |||
1652 | if (tid == LLDB_INVALID_THREAD_ID0) | |||
1653 | return Status(); | |||
1654 | ||||
1655 | return PtraceWrapper(PTRACE_DETACH, tid); | |||
1656 | } | |||
1657 | ||||
1658 | bool NativeProcessLinux::HasThreadNoLock(lldb::tid_t thread_id) { | |||
1659 | for (const auto &thread : m_threads) { | |||
1660 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1660, __PRETTY_FUNCTION__)); | |||
1661 | if (thread->GetID() == thread_id) { | |||
1662 | // We have this thread. | |||
1663 | return true; | |||
1664 | } | |||
1665 | } | |||
1666 | ||||
1667 | // We don't have this thread. | |||
1668 | return false; | |||
1669 | } | |||
1670 | ||||
1671 | bool NativeProcessLinux::StopTrackingThread(lldb::tid_t thread_id) { | |||
1672 | Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2)); | |||
1673 | LLDB_LOG(log, "tid: {0})", thread_id)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "tid: {0})", thread_id); } while (0); | |||
1674 | ||||
1675 | bool found = false; | |||
1676 | for (auto it = m_threads.begin(); it != m_threads.end(); ++it) { | |||
1677 | if (*it && ((*it)->GetID() == thread_id)) { | |||
1678 | m_threads.erase(it); | |||
1679 | found = true; | |||
1680 | break; | |||
1681 | } | |||
1682 | } | |||
1683 | ||||
1684 | if (found) | |||
1685 | StopTracingForThread(thread_id); | |||
1686 | SignalIfAllThreadsStopped(); | |||
1687 | return found; | |||
1688 | } | |||
1689 | ||||
1690 | NativeThreadLinux &NativeProcessLinux::AddThread(lldb::tid_t thread_id) { | |||
1691 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2))); | |||
1692 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid {0} adding thread with tid {1}", GetID(), thread_id ); } while (0); | |||
1693 | ||||
1694 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1695, __PRETTY_FUNCTION__)) | |||
1695 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1695, __PRETTY_FUNCTION__)); | |||
1696 | ||||
1697 | // If this is the first thread, save it as the current thread | |||
1698 | if (m_threads.empty()) | |||
1699 | SetCurrentThreadID(thread_id); | |||
1700 | ||||
1701 | m_threads.push_back(llvm::make_unique<NativeThreadLinux>(*this, thread_id)); | |||
1702 | ||||
1703 | if (m_pt_proces_trace_id != LLDB_INVALID_UID(18446744073709551615UL)) { | |||
1704 | auto traceMonitor = ProcessorTraceMonitor::Create( | |||
1705 | GetID(), thread_id, m_pt_process_trace_config, true); | |||
1706 | if (traceMonitor) { | |||
1707 | m_pt_traced_thread_group.insert(thread_id); | |||
1708 | m_processor_trace_monitor.insert( | |||
1709 | std::make_pair(thread_id, std::move(*traceMonitor))); | |||
1710 | } else { | |||
1711 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "failed to start trace on thread {0}", thread_id) ; } while (0); | |||
1712 | Status error(traceMonitor.takeError()); | |||
1713 | LLDB_LOG(log, "error {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "error {0}", error); } while (0); | |||
1714 | } | |||
1715 | } | |||
1716 | ||||
1717 | return static_cast<NativeThreadLinux &>(*m_threads.back()); | |||
1718 | } | |||
1719 | ||||
1720 | Status NativeProcessLinux::GetLoadedModuleFileSpec(const char *module_path, | |||
1721 | FileSpec &file_spec) { | |||
1722 | Status error = PopulateMemoryRegionCache(); | |||
1723 | if (error.Fail()) | |||
1724 | return error; | |||
1725 | ||||
1726 | FileSpec module_file_spec(module_path, true); | |||
1727 | ||||
1728 | file_spec.Clear(); | |||
1729 | for (const auto &it : m_mem_region_cache) { | |||
1730 | if (it.second.GetFilename() == module_file_spec.GetFilename()) { | |||
1731 | file_spec = it.second; | |||
1732 | return Status(); | |||
1733 | } | |||
1734 | } | |||
1735 | return Status("Module file (%s) not found in /proc/%" PRIu64"l" "u" "/maps file!", | |||
1736 | module_file_spec.GetFilename().AsCString(), GetID()); | |||
1737 | } | |||
1738 | ||||
1739 | Status NativeProcessLinux::GetFileLoadAddress(const llvm::StringRef &file_name, | |||
1740 | lldb::addr_t &load_addr) { | |||
1741 | load_addr = LLDB_INVALID_ADDRESS(18446744073709551615UL); | |||
1742 | Status error = PopulateMemoryRegionCache(); | |||
1743 | if (error.Fail()) | |||
1744 | return error; | |||
1745 | ||||
1746 | FileSpec file(file_name, false); | |||
1747 | for (const auto &it : m_mem_region_cache) { | |||
1748 | if (it.second == file) { | |||
1749 | load_addr = it.first.GetRange().GetRangeBase(); | |||
1750 | return Status(); | |||
1751 | } | |||
1752 | } | |||
1753 | return Status("No load address found for specified file."); | |||
1754 | } | |||
1755 | ||||
1756 | NativeThreadLinux *NativeProcessLinux::GetThreadByID(lldb::tid_t tid) { | |||
1757 | return static_cast<NativeThreadLinux *>( | |||
1758 | NativeProcessProtocol::GetThreadByID(tid)); | |||
1759 | } | |||
1760 | ||||
1761 | Status NativeProcessLinux::ResumeThread(NativeThreadLinux &thread, | |||
1762 | lldb::StateType state, int signo) { | |||
1763 | Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2)); | |||
1764 | LLDB_LOG(log, "tid: {0}", thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "tid: {0}", thread.GetID()); } while (0); | |||
1765 | ||||
1766 | // Before we do the resume below, first check if we have a pending stop | |||
1767 | // notification that is currently waiting for all threads to stop. This is | |||
1768 | // potentially a buggy situation since we're ostensibly waiting for threads | |||
1769 | // to stop before we send out the pending notification, and here we are | |||
1770 | // resuming one before we send out the pending stop notification. | |||
1771 | if (m_pending_notification_tid != LLDB_INVALID_THREAD_ID0) { | |||
1772 | LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
1773 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
1774 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
1775 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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) | |||
1776 | thread.GetID(), m_pending_notification_tid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "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); | |||
1777 | } | |||
1778 | ||||
1779 | // Request a resume. We expect this to be synchronous and the system to | |||
1780 | // reflect it is running after this completes. | |||
1781 | switch (state) { | |||
1782 | case eStateRunning: { | |||
1783 | const auto resume_result = thread.Resume(signo); | |||
1784 | if (resume_result.Success()) | |||
1785 | SetState(eStateRunning, true); | |||
1786 | return resume_result; | |||
1787 | } | |||
1788 | case eStateStepping: { | |||
1789 | const auto step_result = thread.SingleStep(signo); | |||
1790 | if (step_result.Success()) | |||
1791 | SetState(eStateRunning, true); | |||
1792 | return step_result; | |||
1793 | } | |||
1794 | default: | |||
1795 | LLDB_LOG(log, "Unhandled state {0}.", state)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "Unhandled state {0}.", state); } while (0); | |||
1796 | llvm_unreachable("Unhandled state for resume")::llvm::llvm_unreachable_internal("Unhandled state for resume" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , 1796); | |||
1797 | } | |||
1798 | } | |||
1799 | ||||
1800 | //===----------------------------------------------------------------------===// | |||
1801 | ||||
1802 | void NativeProcessLinux::StopRunningThreads(const lldb::tid_t triggering_tid) { | |||
1803 | Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2)); | |||
1804 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "about to process event: (triggering_tid: {0})", triggering_tid ); } while (0) | |||
1805 | triggering_tid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "about to process event: (triggering_tid: {0})", triggering_tid ); } while (0); | |||
1806 | ||||
1807 | m_pending_notification_tid = triggering_tid; | |||
1808 | ||||
1809 | // Request a stop for all the thread stops that need to be stopped and are | |||
1810 | // not already known to be stopped. | |||
1811 | for (const auto &thread : m_threads) { | |||
1812 | if (StateIsRunningState(thread->GetState())) | |||
1813 | static_cast<NativeThreadLinux *>(thread.get())->RequestStop(); | |||
1814 | } | |||
1815 | ||||
1816 | SignalIfAllThreadsStopped(); | |||
1817 | LLDB_LOG(log, "event processing done")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "event processing done"); } while (0); | |||
1818 | } | |||
1819 | ||||
1820 | void NativeProcessLinux::SignalIfAllThreadsStopped() { | |||
1821 | if (m_pending_notification_tid == LLDB_INVALID_THREAD_ID0) | |||
1822 | return; // No pending notification. Nothing to do. | |||
1823 | ||||
1824 | for (const auto &thread_sp : m_threads) { | |||
1825 | if (StateIsRunningState(thread_sp->GetState())) | |||
1826 | return; // Some threads are still running. Don't signal yet. | |||
1827 | } | |||
1828 | ||||
1829 | // We have a pending notification and all threads have stopped. | |||
1830 | Log *log( | |||
1831 | GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1) | LIBLLDB_LOG_BREAKPOINTS(1u << 5))); | |||
1832 | ||||
1833 | // Clear any temporary breakpoints we used to implement software single | |||
1834 | // stepping. | |||
1835 | for (const auto &thread_info : m_threads_stepping_with_breakpoint) { | |||
1836 | Status error = RemoveBreakpoint(thread_info.second); | |||
1837 | if (error.Fail()) | |||
1838 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid = {0} remove stepping breakpoint: {1}", thread_info .first, error); } while (0) | |||
1839 | thread_info.first, error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "pid = {0} remove stepping breakpoint: {1}", thread_info .first, error); } while (0); | |||
1840 | } | |||
1841 | m_threads_stepping_with_breakpoint.clear(); | |||
1842 | ||||
1843 | // Notify the delegate about the stop | |||
1844 | SetCurrentThreadID(m_pending_notification_tid); | |||
1845 | SetState(StateType::eStateStopped, true); | |||
1846 | m_pending_notification_tid = LLDB_INVALID_THREAD_ID0; | |||
1847 | } | |||
1848 | ||||
1849 | void NativeProcessLinux::ThreadWasCreated(NativeThreadLinux &thread) { | |||
1850 | Log *const log = ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD(1u << 2)); | |||
1851 | LLDB_LOG(log, "tid: {0}", thread.GetID())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "tid: {0}", thread.GetID()); } while (0); | |||
1852 | ||||
1853 | if (m_pending_notification_tid != LLDB_INVALID_THREAD_ID0 && | |||
1854 | StateIsRunningState(thread.GetState())) { | |||
1855 | // We will need to wait for this new thread to stop as well before firing | |||
1856 | // the notification. | |||
1857 | thread.RequestStop(); | |||
1858 | } | |||
1859 | } | |||
1860 | ||||
1861 | void NativeProcessLinux::SigchldHandler() { | |||
1862 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS(1u << 1))); | |||
1863 | // Process all pending waitpid notifications. | |||
1864 | while (true) { | |||
1865 | int status = -1; | |||
1866 | ::pid_t wait_pid = llvm::sys::RetryAfterSignal(-1, ::waitpid, -1, &status, | |||
1867 | __WALL0x40000000 | __WNOTHREAD0x20000000 | WNOHANG1); | |||
1868 | ||||
1869 | if (wait_pid == 0) | |||
1870 | break; // We are done. | |||
1871 | ||||
1872 | if (wait_pid == -1) { | |||
1873 | Status error(errno(*__errno_location ()), eErrorTypePOSIX); | |||
1874 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waitpid (-1, &status, _) failed: {0}", error ); } while (0); | |||
1875 | break; | |||
1876 | } | |||
1877 | ||||
1878 | WaitStatus wait_status = WaitStatus::Decode(status); | |||
1879 | bool exited = wait_status.type == WaitStatus::Exit || | |||
1880 | (wait_status.type == WaitStatus::Signal && | |||
1881 | wait_pid == static_cast<::pid_t>(GetID())); | |||
1882 | ||||
1883 | LLDB_LOG(do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}" , wait_pid, wait_status, exited); } while (0) | |||
1884 | log,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}" , wait_pid, wait_status, exited); } while (0) | |||
1885 | "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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}" , wait_pid, wait_status, exited); } while (0) | |||
1886 | wait_pid, wait_status, exited)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "waitpid (-1, &status, _) => pid = {0}, status = {1}, exited = {2}" , wait_pid, wait_status, exited); } while (0); | |||
1887 | ||||
1888 | MonitorCallback(wait_pid, exited, wait_status); | |||
1889 | } | |||
1890 | } | |||
1891 | ||||
1892 | // Wrapper for ptrace to catch errors and log calls. Note that ptrace sets | |||
1893 | // errno on error because -1 can be a valid result (i.e. for PTRACE_PEEK*) | |||
1894 | Status NativeProcessLinux::PtraceWrapper(int req, lldb::pid_t pid, void *addr, | |||
1895 | void *data, size_t data_size, | |||
1896 | long *result) { | |||
1897 | Status error; | |||
1898 | long int ret; | |||
1899 | ||||
1900 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5))); | |||
1901 | ||||
1902 | PtraceDisplayBytes(req, data, data_size); | |||
1903 | ||||
1904 | errno(*__errno_location ()) = 0; | |||
1905 | if (req == PTRACE_GETREGSETPTRACE_GETREGSET || req == PTRACE_SETREGSETPTRACE_SETREGSET) | |||
1906 | ret = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid), | |||
1907 | *(unsigned int *)addr, data); | |||
1908 | else | |||
1909 | ret = ptrace(static_cast<__ptrace_request>(req), static_cast<::pid_t>(pid), | |||
1910 | addr, data); | |||
1911 | ||||
1912 | if (ret == -1) | |||
1913 | error.SetErrorToErrno(); | |||
1914 | ||||
1915 | if (result) | |||
1916 | *result = ret; | |||
1917 | ||||
1918 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "ptrace({0}, {1}, {2}, {3}, {4})={5:x}", req, pid , addr, data, data_size, ret); } while (0) | |||
1919 | data_size, ret)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "ptrace({0}, {1}, {2}, {3}, {4})={5:x}", req, pid , addr, data, data_size, ret); } while (0); | |||
1920 | ||||
1921 | PtraceDisplayBytes(req, data, data_size); | |||
1922 | ||||
1923 | if (error.Fail()) | |||
1924 | LLDB_LOG(log, "ptrace() failed: {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "ptrace() failed: {0}", error); } while (0); | |||
1925 | ||||
1926 | return error; | |||
1927 | } | |||
1928 | ||||
1929 | llvm::Expected<ProcessorTraceMonitor &> | |||
1930 | NativeProcessLinux::LookupProcessorTraceInstance(lldb::user_id_t traceid, | |||
1931 | lldb::tid_t thread) { | |||
1932 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5))); | |||
1933 | if (thread == LLDB_INVALID_THREAD_ID0 && traceid == m_pt_proces_trace_id) { | |||
1934 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "thread not specified: {0}", traceid); } while (0 ); | |||
1935 | return Status("tracing not active thread not specified").ToError(); | |||
1936 | } | |||
1937 | ||||
1938 | for (auto& iter : m_processor_trace_monitor) { | |||
1939 | if (traceid == iter.second->GetTraceID() && | |||
1940 | (thread == iter.first || thread == LLDB_INVALID_THREAD_ID0)) | |||
1941 | return *(iter.second); | |||
1942 | } | |||
1943 | ||||
1944 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "traceid not being traced: {0}", traceid); } while (0); | |||
1945 | return Status("tracing not active for this thread").ToError(); | |||
1946 | } | |||
1947 | ||||
1948 | Status NativeProcessLinux::GetMetaData(lldb::user_id_t traceid, | |||
1949 | lldb::tid_t thread, | |||
1950 | llvm::MutableArrayRef<uint8_t> &buffer, | |||
1951 | size_t offset) { | |||
1952 | TraceOptions trace_options; | |||
1953 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5))); | |||
1954 | Status error; | |||
1955 | ||||
1956 | LLDB_LOG(log, "traceid {0}", traceid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "traceid {0}", traceid); } while (0); | |||
1957 | ||||
1958 | auto perf_monitor = LookupProcessorTraceInstance(traceid, thread); | |||
1959 | if (!perf_monitor) { | |||
1960 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "traceid not being traced: {0}", traceid); } while (0); | |||
1961 | buffer = buffer.slice(buffer.size()); | |||
1962 | error = perf_monitor.takeError(); | |||
1963 | return error; | |||
1964 | } | |||
1965 | return (*perf_monitor).ReadPerfTraceData(buffer, offset); | |||
1966 | } | |||
1967 | ||||
1968 | Status NativeProcessLinux::GetData(lldb::user_id_t traceid, lldb::tid_t thread, | |||
1969 | llvm::MutableArrayRef<uint8_t> &buffer, | |||
1970 | size_t offset) { | |||
1971 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5))); | |||
1972 | Status error; | |||
1973 | ||||
1974 | LLDB_LOG(log, "traceid {0}", traceid)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "traceid {0}", traceid); } while (0); | |||
1975 | ||||
1976 | auto perf_monitor = LookupProcessorTraceInstance(traceid, thread); | |||
1977 | if (!perf_monitor) { | |||
1978 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "traceid not being traced: {0}", traceid); } while (0); | |||
1979 | buffer = buffer.slice(buffer.size()); | |||
1980 | error = perf_monitor.takeError(); | |||
1981 | return error; | |||
1982 | } | |||
1983 | return (*perf_monitor).ReadPerfTraceAux(buffer, offset); | |||
1984 | } | |||
1985 | ||||
1986 | Status NativeProcessLinux::GetTraceConfig(lldb::user_id_t traceid, | |||
1987 | TraceOptions &config) { | |||
1988 | Status error; | |||
1989 | if (config.getThreadID() == LLDB_INVALID_THREAD_ID0 && | |||
1990 | m_pt_proces_trace_id == traceid) { | |||
1991 | if (m_pt_proces_trace_id == LLDB_INVALID_UID(18446744073709551615UL)) { | |||
1992 | error.SetErrorString("tracing not active for this process"); | |||
1993 | return error; | |||
1994 | } | |||
1995 | config = m_pt_process_trace_config; | |||
1996 | } else { | |||
1997 | auto perf_monitor = | |||
1998 | LookupProcessorTraceInstance(traceid, config.getThreadID()); | |||
1999 | if (!perf_monitor) { | |||
2000 | error = perf_monitor.takeError(); | |||
2001 | return error; | |||
2002 | } | |||
2003 | error = (*perf_monitor).GetTraceConfig(config); | |||
2004 | } | |||
2005 | return error; | |||
2006 | } | |||
2007 | ||||
2008 | lldb::user_id_t | |||
2009 | NativeProcessLinux::StartTraceGroup(const TraceOptions &config, | |||
2010 | Status &error) { | |||
2011 | ||||
2012 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5))); | |||
2013 | if (config.getType() != TraceType::eTraceTypeProcessorTrace) | |||
2014 | return LLDB_INVALID_UID(18446744073709551615UL); | |||
2015 | ||||
2016 | if (m_pt_proces_trace_id != LLDB_INVALID_UID(18446744073709551615UL)) { | |||
2017 | error.SetErrorString("tracing already active on this process"); | |||
2018 | return m_pt_proces_trace_id; | |||
2019 | } | |||
2020 | ||||
2021 | for (const auto &thread_sp : m_threads) { | |||
2022 | if (auto traceInstance = ProcessorTraceMonitor::Create( | |||
2023 | GetID(), thread_sp->GetID(), config, true)) { | |||
2024 | m_pt_traced_thread_group.insert(thread_sp->GetID()); | |||
2025 | m_processor_trace_monitor.insert( | |||
2026 | std::make_pair(thread_sp->GetID(), std::move(*traceInstance))); | |||
2027 | } | |||
2028 | } | |||
2029 | ||||
2030 | m_pt_process_trace_config = config; | |||
2031 | error = ProcessorTraceMonitor::GetCPUType(m_pt_process_trace_config); | |||
2032 | ||||
2033 | // Trace on Complete process will have traceid of 0 | |||
2034 | m_pt_proces_trace_id = 0; | |||
2035 | ||||
2036 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "Process Trace ID {0}", m_pt_proces_trace_id); } while (0); | |||
2037 | return m_pt_proces_trace_id; | |||
2038 | } | |||
2039 | ||||
2040 | lldb::user_id_t NativeProcessLinux::StartTrace(const TraceOptions &config, | |||
2041 | Status &error) { | |||
2042 | if (config.getType() != TraceType::eTraceTypeProcessorTrace) | |||
2043 | return NativeProcessProtocol::StartTrace(config, error); | |||
2044 | ||||
2045 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5))); | |||
2046 | ||||
2047 | lldb::tid_t threadid = config.getThreadID(); | |||
2048 | ||||
2049 | if (threadid == LLDB_INVALID_THREAD_ID0) | |||
2050 | return StartTraceGroup(config, error); | |||
2051 | ||||
2052 | auto thread_sp = GetThreadByID(threadid); | |||
2053 | if (!thread_sp) { | |||
2054 | // Thread not tracked by lldb so don't trace. | |||
2055 | error.SetErrorString("invalid thread id"); | |||
2056 | return LLDB_INVALID_UID(18446744073709551615UL); | |||
2057 | } | |||
2058 | ||||
2059 | const auto &iter = m_processor_trace_monitor.find(threadid); | |||
2060 | if (iter != m_processor_trace_monitor.end()) { | |||
2061 | LLDB_LOG(log, "Thread already being traced")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "Thread already being traced"); } while (0); | |||
2062 | error.SetErrorString("tracing already active on this thread"); | |||
2063 | return LLDB_INVALID_UID(18446744073709551615UL); | |||
2064 | } | |||
2065 | ||||
2066 | auto traceMonitor = | |||
2067 | ProcessorTraceMonitor::Create(GetID(), threadid, config, false); | |||
2068 | if (!traceMonitor) { | |||
2069 | error = traceMonitor.takeError(); | |||
2070 | LLDB_LOG(log, "error {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "error {0}", error); } while (0); | |||
2071 | return LLDB_INVALID_UID(18446744073709551615UL); | |||
2072 | } | |||
2073 | lldb::user_id_t ret_trace_id = (*traceMonitor)->GetTraceID(); | |||
2074 | m_processor_trace_monitor.insert( | |||
2075 | std::make_pair(threadid, std::move(*traceMonitor))); | |||
2076 | return ret_trace_id; | |||
2077 | } | |||
2078 | ||||
2079 | Status NativeProcessLinux::StopTracingForThread(lldb::tid_t thread) { | |||
2080 | Status error; | |||
2081 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5))); | |||
2082 | LLDB_LOG(log, "Thread {0}", thread)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "Thread {0}", thread); } while (0); | |||
2083 | ||||
2084 | const auto& iter = m_processor_trace_monitor.find(thread); | |||
2085 | if (iter == m_processor_trace_monitor.end()) { | |||
2086 | error.SetErrorString("tracing not active for this thread"); | |||
2087 | return error; | |||
2088 | } | |||
2089 | ||||
2090 | if (iter->second->GetTraceID() == m_pt_proces_trace_id) { | |||
2091 | // traceid maps to the whole process so we have to erase it from the thread | |||
2092 | // group. | |||
2093 | LLDB_LOG(log, "traceid maps to process")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "traceid maps to process"); } while (0); | |||
2094 | m_pt_traced_thread_group.erase(thread); | |||
2095 | } | |||
2096 | m_processor_trace_monitor.erase(iter); | |||
2097 | ||||
2098 | return error; | |||
2099 | } | |||
2100 | ||||
2101 | Status NativeProcessLinux::StopTrace(lldb::user_id_t traceid, | |||
2102 | lldb::tid_t thread) { | |||
2103 | Status error; | |||
2104 | ||||
2105 | TraceOptions trace_options; | |||
| ||||
2106 | trace_options.setThreadID(thread); | |||
2107 | error = NativeProcessLinux::GetTraceConfig(traceid, trace_options); | |||
2108 | ||||
2109 | if (error.Fail()) | |||
2110 | return error; | |||
2111 | ||||
2112 | switch (trace_options.getType()) { | |||
2113 | case lldb::TraceType::eTraceTypeProcessorTrace: | |||
2114 | if (traceid == m_pt_proces_trace_id && | |||
2115 | thread == LLDB_INVALID_THREAD_ID0) | |||
2116 | StopProcessorTracingOnProcess(); | |||
2117 | else | |||
2118 | error = StopProcessorTracingOnThread(traceid, thread); | |||
2119 | break; | |||
2120 | default: | |||
2121 | error.SetErrorString("trace not supported"); | |||
2122 | break; | |||
2123 | } | |||
2124 | ||||
2125 | return error; | |||
2126 | } | |||
2127 | ||||
2128 | void NativeProcessLinux::StopProcessorTracingOnProcess() { | |||
2129 | for (auto thread_id_iter : m_pt_traced_thread_group) | |||
2130 | m_processor_trace_monitor.erase(thread_id_iter); | |||
2131 | m_pt_traced_thread_group.clear(); | |||
2132 | m_pt_proces_trace_id = LLDB_INVALID_UID(18446744073709551615UL); | |||
2133 | } | |||
2134 | ||||
2135 | Status NativeProcessLinux::StopProcessorTracingOnThread(lldb::user_id_t traceid, | |||
2136 | lldb::tid_t thread) { | |||
2137 | Status error; | |||
2138 | Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE(1u << 5))); | |||
2139 | ||||
2140 | if (thread == LLDB_INVALID_THREAD_ID0) { | |||
2141 | for (auto& iter : m_processor_trace_monitor) { | |||
2142 | if (iter.second->GetTraceID() == traceid) { | |||
2143 | // Stopping a trace instance for an individual thread hence there will | |||
2144 | // only be one traceid that can match. | |||
2145 | m_processor_trace_monitor.erase(iter.first); | |||
2146 | return error; | |||
2147 | } | |||
2148 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "Trace ID {0}", iter.second->GetTraceID()); } while (0); | |||
2149 | } | |||
2150 | ||||
2151 | LLDB_LOG(log, "Invalid TraceID")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "Invalid TraceID"); } while (0); | |||
2152 | error.SetErrorString("invalid trace id"); | |||
2153 | return error; | |||
2154 | } | |||
2155 | ||||
2156 | // thread is specified so we can use find function on the map. | |||
2157 | const auto& iter = m_processor_trace_monitor.find(thread); | |||
2158 | if (iter == m_processor_trace_monitor.end()) { | |||
2159 | // thread not found in our map. | |||
2160 | LLDB_LOG(log, "thread not being traced")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "thread not being traced"); } while (0); | |||
2161 | error.SetErrorString("tracing not active for this thread"); | |||
2162 | return error; | |||
2163 | } | |||
2164 | if (iter->second->GetTraceID() != traceid) { | |||
2165 | // traceid did not match so it has to be invalid. | |||
2166 | LLDB_LOG(log, "Invalid TraceID")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "Invalid TraceID"); } while (0); | |||
2167 | error.SetErrorString("invalid trace id"); | |||
2168 | return error; | |||
2169 | } | |||
2170 | ||||
2171 | 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-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "UID - {0} , Thread -{1}", traceid, thread); } while (0); | |||
2172 | ||||
2173 | if (traceid == m_pt_proces_trace_id) { | |||
2174 | // traceid maps to the whole process so we have to erase it from the thread | |||
2175 | // group. | |||
2176 | LLDB_LOG(log, "traceid maps to process")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp" , __func__, "traceid maps to process"); } while (0); | |||
2177 | m_pt_traced_thread_group.erase(thread); | |||
2178 | } | |||
2179 | m_processor_trace_monitor.erase(iter); | |||
2180 | ||||
2181 | return error; | |||
2182 | } |
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 | ||||
18 | namespace lldb_private { | |||
19 | class TraceOptions { | |||
20 | public: | |||
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; } | |||
| ||||
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 | ||||
47 | private: | |||
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_ |