1 //===-- NativeProcessNetBSD.cpp ------------------------------- -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "NativeProcessNetBSD.h"
16 // Other libraries and framework includes
17 #include "Plugins/Process/POSIX/ProcessPOSIXLog.h"
18 #include "lldb/Core/State.h"
19 #include "lldb/Host/HostProcess.h"
20 #include "lldb/Host/common/NativeBreakpoint.h"
21 #include "lldb/Host/common/NativeRegisterContext.h"
22 #include "lldb/Host/posix/ProcessLauncherPosixFork.h"
23 #include "lldb/Target/Process.h"
24 #include "llvm/Support/Errno.h"
26 // System includes - They have to be included after framework includes because
28 // macros which collide with variable names in other modules
30 #include <sys/types.h>
31 #include <sys/ptrace.h>
32 #include <sys/sysctl.h>
34 #include <uvm/uvm_prot.h>
40 using namespace lldb_private;
41 using namespace lldb_private::process_netbsd;
44 // Simple helper function to ensure flags are enabled on the given file
46 static Status EnsureFDFlags(int fd, int flags) {
49 int status = fcntl(fd, F_GETFL);
51 error.SetErrorToErrno();
55 if (fcntl(fd, F_SETFL, status | flags) == -1) {
56 error.SetErrorToErrno();
63 // -----------------------------------------------------------------------------
64 // Public Static Methods
65 // -----------------------------------------------------------------------------
67 llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
68 NativeProcessNetBSD::Factory::Launch(ProcessLaunchInfo &launch_info,
69 NativeDelegate &native_delegate,
70 MainLoop &mainloop) const {
71 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
74 ::pid_t pid = ProcessLauncherPosixFork()
75 .LaunchProcess(launch_info, status)
77 LLDB_LOG(log, "pid = {0:x}", pid);
79 LLDB_LOG(log, "failed to launch process: {0}", status);
80 return status.ToError();
83 // Wait for the child process to trap on its call to execve.
85 ::pid_t wpid = llvm::sys::RetryAfterSignal(-1, ::waitpid, pid, &wstatus, 0);
88 if (!WIFSTOPPED(wstatus)) {
89 LLDB_LOG(log, "Could not sync with inferior process: wstatus={1}",
90 WaitStatus::Decode(wstatus));
91 return llvm::make_error<StringError>("Could not sync with inferior process",
92 llvm::inconvertibleErrorCode());
94 LLDB_LOG(log, "inferior started, now in stopped state");
97 if ((status = ResolveProcessArchitecture(pid, arch)).Fail())
98 return status.ToError();
100 // Set the architecture to the exe architecture.
101 LLDB_LOG(log, "pid = {0:x}, detected architecture {1}", pid,
102 arch.GetArchitectureName());
104 std::unique_ptr<NativeProcessNetBSD> process_up(new NativeProcessNetBSD(
105 pid, launch_info.GetPTY().ReleaseMasterFileDescriptor(), native_delegate,
108 status = process_up->ReinitializeThreads();
110 return status.ToError();
112 for (const auto &thread : process_up->m_threads)
113 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedBySignal(SIGSTOP);
114 process_up->SetState(StateType::eStateStopped, false);
116 return std::move(process_up);
119 llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
120 NativeProcessNetBSD::Factory::Attach(
121 lldb::pid_t pid, NativeProcessProtocol::NativeDelegate &native_delegate,
122 MainLoop &mainloop) const {
123 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
124 LLDB_LOG(log, "pid = {0:x}", pid);
126 // Retrieve the architecture for the running process.
128 Status status = ResolveProcessArchitecture(pid, arch);
129 if (!status.Success())
130 return status.ToError();
132 std::unique_ptr<NativeProcessNetBSD> process_up(
133 new NativeProcessNetBSD(pid, -1, native_delegate, arch, mainloop));
135 status = process_up->Attach();
136 if (!status.Success())
137 return status.ToError();
139 return std::move(process_up);
142 // -----------------------------------------------------------------------------
143 // Public Instance Methods
144 // -----------------------------------------------------------------------------
146 NativeProcessNetBSD::NativeProcessNetBSD(::pid_t pid, int terminal_fd,
147 NativeDelegate &delegate,
148 const ArchSpec &arch,
150 : NativeProcessProtocol(pid, terminal_fd, delegate), m_arch(arch) {
151 if (m_terminal_fd != -1) {
152 Status status = EnsureFDFlags(m_terminal_fd, O_NONBLOCK);
153 assert(status.Success());
157 m_sigchld_handle = mainloop.RegisterSignal(
158 SIGCHLD, [this](MainLoopBase &) { SigchldHandler(); }, status);
159 assert(m_sigchld_handle && status.Success());
162 // Handles all waitpid events from the inferior process.
163 void NativeProcessNetBSD::MonitorCallback(lldb::pid_t pid, int signal) {
166 return MonitorSIGTRAP(pid);
168 return MonitorSIGSTOP(pid);
170 return MonitorSignal(pid, signal);
174 void NativeProcessNetBSD::MonitorExited(lldb::pid_t pid, WaitStatus status) {
175 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
177 LLDB_LOG(log, "got exit signal({0}) , pid = {1}", status, pid);
179 /* Stop Tracking All Threads attached to Process */
182 SetExitStatus(status, true);
184 // Notify delegate that our process has exited.
185 SetState(StateType::eStateExited, true);
188 void NativeProcessNetBSD::MonitorSIGSTOP(lldb::pid_t pid) {
189 ptrace_siginfo_t info;
191 const auto siginfo_err =
192 PtraceWrapper(PT_GET_SIGINFO, pid, &info, sizeof(info));
194 // Get details on the signal raised.
195 if (siginfo_err.Success()) {
196 // Handle SIGSTOP from LLGS (LLDB GDB Server)
197 if (info.psi_siginfo.si_code == SI_USER &&
198 info.psi_siginfo.si_pid == ::getpid()) {
199 /* Stop Tracking all Threads attached to Process */
200 for (const auto &thread : m_threads) {
201 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedBySignal(
202 SIGSTOP, &info.psi_siginfo);
208 void NativeProcessNetBSD::MonitorSIGTRAP(lldb::pid_t pid) {
209 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
210 ptrace_siginfo_t info;
212 const auto siginfo_err =
213 PtraceWrapper(PT_GET_SIGINFO, pid, &info, sizeof(info));
215 // Get details on the signal raised.
216 if (siginfo_err.Fail()) {
220 switch (info.psi_siginfo.si_code) {
222 for (const auto &thread : m_threads) {
223 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedByBreakpoint();
224 FixupBreakpointPCAsNeeded(static_cast<NativeThreadNetBSD &>(*thread));
226 SetState(StateType::eStateStopped, true);
229 for (const auto &thread : m_threads)
230 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedByTrace();
231 SetState(StateType::eStateStopped, true);
234 Status error = ReinitializeThreads();
236 SetState(StateType::eStateInvalid);
240 // Let our delegate know we have just exec'd.
243 for (const auto &thread : m_threads)
244 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedByExec();
245 SetState(StateType::eStateStopped, true);
248 // If a watchpoint was hit, report it
250 Status error = static_cast<NativeThreadNetBSD &>(*m_threads[info.psi_lwpid])
251 .GetRegisterContext()
252 .GetWatchpointHitIndex(
253 wp_index, (uintptr_t)info.psi_siginfo.si_addr);
256 "received error while checking for watchpoint hits, pid = "
257 "{0}, LWP = {1}, error = {2}",
258 GetID(), info.psi_lwpid, error);
259 if (wp_index != LLDB_INVALID_INDEX32) {
260 for (const auto &thread : m_threads)
261 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedByWatchpoint(
263 SetState(StateType::eStateStopped, true);
267 // If a breakpoint was hit, report it
269 error = static_cast<NativeThreadNetBSD &>(*m_threads[info.psi_lwpid])
270 .GetRegisterContext()
271 .GetHardwareBreakHitIndex(bp_index,
272 (uintptr_t)info.psi_siginfo.si_addr);
275 "received error while checking for hardware "
276 "breakpoint hits, pid = {0}, LWP = {1}, error = {2}",
277 GetID(), info.psi_lwpid, error);
278 if (bp_index != LLDB_INVALID_INDEX32) {
279 for (const auto &thread : m_threads)
280 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedByBreakpoint();
281 SetState(StateType::eStateStopped, true);
288 void NativeProcessNetBSD::MonitorSignal(lldb::pid_t pid, int signal) {
289 ptrace_siginfo_t info;
290 const auto siginfo_err =
291 PtraceWrapper(PT_GET_SIGINFO, pid, &info, sizeof(info));
293 for (const auto &thread : m_threads) {
294 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedBySignal(
295 info.psi_siginfo.si_signo, &info.psi_siginfo);
297 SetState(StateType::eStateStopped, true);
300 Status NativeProcessNetBSD::PtraceWrapper(int req, lldb::pid_t pid, void *addr,
301 int data, int *result) {
302 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE));
307 ret = ptrace(req, static_cast<::pid_t>(pid), addr, data);
310 error.SetErrorToErrno();
315 LLDB_LOG(log, "ptrace({0}, {1}, {2}, {3})={4:x}", req, pid, addr, data, ret);
318 LLDB_LOG(log, "ptrace() failed: {0}", error);
323 Status NativeProcessNetBSD::GetSoftwareBreakpointPCOffset(
324 uint32_t &actual_opcode_size) {
325 // FIXME put this behind a breakpoint protocol class that can be
326 // set per architecture. Need ARM, MIPS support here.
327 static const uint8_t g_i386_opcode[] = {0xCC};
328 switch (m_arch.GetMachine()) {
329 case llvm::Triple::x86_64:
330 actual_opcode_size = static_cast<uint32_t>(sizeof(g_i386_opcode));
333 assert(false && "CPU type not supported!");
334 return Status("CPU type not supported");
339 NativeProcessNetBSD::FixupBreakpointPCAsNeeded(NativeThreadNetBSD &thread) {
340 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_BREAKPOINTS));
342 // Find out the size of a breakpoint (might depend on where we are in the
344 NativeRegisterContext& context = thread.GetRegisterContext();
345 uint32_t breakpoint_size = 0;
346 error = GetSoftwareBreakpointPCOffset(breakpoint_size);
348 LLDB_LOG(log, "GetBreakpointSize() failed: {0}", error);
351 LLDB_LOG(log, "breakpoint size: {0}", breakpoint_size);
352 // First try probing for a breakpoint at a software breakpoint location: PC
353 // - breakpoint size.
354 const lldb::addr_t initial_pc_addr =
355 context.GetPCfromBreakpointLocation();
356 lldb::addr_t breakpoint_addr = initial_pc_addr;
357 if (breakpoint_size > 0) {
358 // Do not allow breakpoint probe to wrap around.
359 if (breakpoint_addr >= breakpoint_size)
360 breakpoint_addr -= breakpoint_size;
362 // Check if we stopped because of a breakpoint.
363 NativeBreakpointSP breakpoint_sp;
364 error = m_breakpoint_list.GetBreakpoint(breakpoint_addr, breakpoint_sp);
365 if (!error.Success() || !breakpoint_sp) {
366 // We didn't find one at a software probe location. Nothing to do.
368 "pid {0} no lldb breakpoint found at current pc with "
370 GetID(), breakpoint_addr);
373 // If the breakpoint is not a software breakpoint, nothing to do.
374 if (!breakpoint_sp->IsSoftwareBreakpoint()) {
377 "pid {0} breakpoint found at {1:x}, not software, nothing to adjust",
378 GetID(), breakpoint_addr);
382 // We have a software breakpoint and need to adjust the PC.
385 if (breakpoint_size == 0) {
386 // Nothing to do! How did we get here?
388 "pid {0} breakpoint found at {1:x}, it is software, but the "
389 "size is zero, nothing to do (unexpected)",
390 GetID(), breakpoint_addr);
394 // We have a software breakpoint and need to adjust the PC.
397 if (breakpoint_size == 0) {
398 // Nothing to do! How did we get here?
400 "pid {0} breakpoint found at {1:x}, it is software, but the "
401 "size is zero, nothing to do (unexpected)",
402 GetID(), breakpoint_addr);
405 // Change the program counter.
406 LLDB_LOG(log, "pid {0} tid {1}: changing PC from {2:x} to {3:x}", GetID(),
407 thread.GetID(), initial_pc_addr, breakpoint_addr);
408 error = context.SetPC(breakpoint_addr);
410 LLDB_LOG(log, "pid {0} tid {1}: failed to set PC: {2}", GetID(),
411 thread.GetID(), error);
417 Status NativeProcessNetBSD::Resume(const ResumeActionList &resume_actions) {
418 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
419 LLDB_LOG(log, "pid {0}", GetID());
421 const auto &thread = m_threads[0];
422 const ResumeAction *const action =
423 resume_actions.GetActionForThread(thread->GetID(), true);
425 if (action == nullptr) {
426 LLDB_LOG(log, "no action specified for pid {0} tid {1}", GetID(),
433 switch (action->state) {
434 case eStateRunning: {
435 // Run the thread, possibly feeding it the signal.
436 error = NativeProcessNetBSD::PtraceWrapper(PT_CONTINUE, GetID(), (void *)1,
438 if (!error.Success())
440 for (const auto &thread : m_threads)
441 static_cast<NativeThreadNetBSD &>(*thread).SetRunning();
442 SetState(eStateRunning, true);
446 // Run the thread, possibly feeding it the signal.
447 error = NativeProcessNetBSD::PtraceWrapper(PT_STEP, GetID(), (void *)1,
449 if (!error.Success())
451 for (const auto &thread : m_threads)
452 static_cast<NativeThreadNetBSD &>(*thread).SetStepping();
453 SetState(eStateStepping, true);
456 case eStateSuspended:
458 llvm_unreachable("Unexpected state");
461 return Status("NativeProcessNetBSD::%s (): unexpected state %s specified "
462 "for pid %" PRIu64 ", tid %" PRIu64,
463 __FUNCTION__, StateAsCString(action->state), GetID(),
470 Status NativeProcessNetBSD::Halt() {
473 if (kill(GetID(), SIGSTOP) != 0)
474 error.SetErrorToErrno();
479 Status NativeProcessNetBSD::Detach() {
482 // Stop monitoring the inferior.
483 m_sigchld_handle.reset();
485 // Tell ptrace to detach from the process.
486 if (GetID() == LLDB_INVALID_PROCESS_ID)
489 return PtraceWrapper(PT_DETACH, GetID());
492 Status NativeProcessNetBSD::Signal(int signo) {
495 if (kill(GetID(), signo))
496 error.SetErrorToErrno();
501 Status NativeProcessNetBSD::Kill() {
502 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
503 LLDB_LOG(log, "pid {0}", GetID());
508 case StateType::eStateInvalid:
509 case StateType::eStateExited:
510 case StateType::eStateCrashed:
511 case StateType::eStateDetached:
512 case StateType::eStateUnloaded:
513 // Nothing to do - the process is already dead.
514 LLDB_LOG(log, "ignored for PID {0} due to current state: {1}", GetID(),
515 StateAsCString(m_state));
518 case StateType::eStateConnected:
519 case StateType::eStateAttaching:
520 case StateType::eStateLaunching:
521 case StateType::eStateStopped:
522 case StateType::eStateRunning:
523 case StateType::eStateStepping:
524 case StateType::eStateSuspended:
525 // We can try to kill a process in these states.
529 if (kill(GetID(), SIGKILL) != 0) {
530 error.SetErrorToErrno();
537 Status NativeProcessNetBSD::GetMemoryRegionInfo(lldb::addr_t load_addr,
538 MemoryRegionInfo &range_info) {
540 if (m_supports_mem_region == LazyBool::eLazyBoolNo) {
542 return Status("unsupported");
545 Status error = PopulateMemoryRegionCache();
550 lldb::addr_t prev_base_address = 0;
551 // FIXME start by finding the last region that is <= target address using
552 // binary search. Data is sorted.
553 // There can be a ton of regions on pthreads apps with lots of threads.
554 for (auto it = m_mem_region_cache.begin(); it != m_mem_region_cache.end();
556 MemoryRegionInfo &proc_entry_info = it->first;
557 // Sanity check assumption that memory map entries are ascending.
558 assert((proc_entry_info.GetRange().GetRangeBase() >= prev_base_address) &&
559 "descending memory map entries detected, unexpected");
560 prev_base_address = proc_entry_info.GetRange().GetRangeBase();
561 UNUSED_IF_ASSERT_DISABLED(prev_base_address);
562 // If the target address comes before this entry, indicate distance to
564 if (load_addr < proc_entry_info.GetRange().GetRangeBase()) {
565 range_info.GetRange().SetRangeBase(load_addr);
566 range_info.GetRange().SetByteSize(
567 proc_entry_info.GetRange().GetRangeBase() - load_addr);
568 range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
569 range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
570 range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
571 range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo);
573 } else if (proc_entry_info.GetRange().Contains(load_addr)) {
574 // The target address is within the memory region we're processing here.
575 range_info = proc_entry_info;
578 // The target memory address comes somewhere after the region we just
581 // If we made it here, we didn't find an entry that contained the given
582 // address. Return the
583 // load_addr as start and the amount of bytes betwwen load address and the
584 // end of the memory as size.
585 range_info.GetRange().SetRangeBase(load_addr);
586 range_info.GetRange().SetRangeEnd(LLDB_INVALID_ADDRESS);
587 range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
588 range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
589 range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
590 range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo);
594 Status NativeProcessNetBSD::PopulateMemoryRegionCache() {
595 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
596 // If our cache is empty, pull the latest. There should always be at least
597 // one memory region if memory region handling is supported.
598 if (!m_mem_region_cache.empty()) {
599 LLDB_LOG(log, "reusing {0} cached memory region entries",
600 m_mem_region_cache.size());
604 struct kinfo_vmentry *vm;
606 vm = kinfo_getvmmap(GetID(), &count);
608 m_supports_mem_region = LazyBool::eLazyBoolNo;
610 error.SetErrorString("not supported");
613 for (i = 0; i < count; i++) {
614 MemoryRegionInfo info;
616 info.GetRange().SetRangeBase(vm[i].kve_start);
617 info.GetRange().SetRangeEnd(vm[i].kve_end);
618 info.SetMapped(MemoryRegionInfo::OptionalBool::eYes);
620 if (vm[i].kve_protection & VM_PROT_READ)
621 info.SetReadable(MemoryRegionInfo::OptionalBool::eYes);
623 info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
625 if (vm[i].kve_protection & VM_PROT_WRITE)
626 info.SetWritable(MemoryRegionInfo::OptionalBool::eYes);
628 info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
630 if (vm[i].kve_protection & VM_PROT_EXECUTE)
631 info.SetExecutable(MemoryRegionInfo::OptionalBool::eYes);
633 info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
635 if (vm[i].kve_path[0])
636 info.SetName(vm[i].kve_path);
638 m_mem_region_cache.emplace_back(
639 info, FileSpec(info.GetName().GetCString(), true));
643 if (m_mem_region_cache.empty()) {
644 // No entries after attempting to read them. This shouldn't happen.
645 // Assume we don't support map entries.
646 LLDB_LOG(log, "failed to find any vmmap entries, assuming no support "
647 "for memory region metadata retrieval");
648 m_supports_mem_region = LazyBool::eLazyBoolNo;
650 error.SetErrorString("not supported");
653 LLDB_LOG(log, "read {0} memory region entries from process {1}",
654 m_mem_region_cache.size(), GetID());
655 // We support memory retrieval, remember that.
656 m_supports_mem_region = LazyBool::eLazyBoolYes;
660 Status NativeProcessNetBSD::AllocateMemory(size_t size, uint32_t permissions,
661 lldb::addr_t &addr) {
662 return Status("Unimplemented");
665 Status NativeProcessNetBSD::DeallocateMemory(lldb::addr_t addr) {
666 return Status("Unimplemented");
669 lldb::addr_t NativeProcessNetBSD::GetSharedLibraryInfoAddress() {
670 // punt on this for now
671 return LLDB_INVALID_ADDRESS;
674 size_t NativeProcessNetBSD::UpdateThreads() { return m_threads.size(); }
676 Status NativeProcessNetBSD::SetBreakpoint(lldb::addr_t addr, uint32_t size,
679 return Status("NativeProcessNetBSD does not support hardware breakpoints");
681 return SetSoftwareBreakpoint(addr, size);
684 Status NativeProcessNetBSD::GetSoftwareBreakpointTrapOpcode(
685 size_t trap_opcode_size_hint, size_t &actual_opcode_size,
686 const uint8_t *&trap_opcode_bytes) {
687 static const uint8_t g_i386_opcode[] = {0xCC};
689 switch (m_arch.GetMachine()) {
690 case llvm::Triple::x86:
691 case llvm::Triple::x86_64:
692 trap_opcode_bytes = g_i386_opcode;
693 actual_opcode_size = sizeof(g_i386_opcode);
696 assert(false && "CPU type not supported!");
697 return Status("CPU type not supported");
701 Status NativeProcessNetBSD::GetLoadedModuleFileSpec(const char *module_path,
702 FileSpec &file_spec) {
703 return Status("Unimplemented");
706 Status NativeProcessNetBSD::GetFileLoadAddress(const llvm::StringRef &file_name,
707 lldb::addr_t &load_addr) {
708 load_addr = LLDB_INVALID_ADDRESS;
712 void NativeProcessNetBSD::SigchldHandler() {
713 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS));
714 // Process all pending waitpid notifications.
717 llvm::sys::RetryAfterSignal(-1, waitpid, GetID(), &status, WALLSIG | WNOHANG);
720 return; // We are done.
722 if (wait_pid == -1) {
723 Status error(errno, eErrorTypePOSIX);
724 LLDB_LOG(log, "waitpid ({0}, &status, _) failed: {1}", GetID(), error);
727 WaitStatus wait_status = WaitStatus::Decode(status);
728 bool exited = wait_status.type == WaitStatus::Exit ||
729 (wait_status.type == WaitStatus::Signal &&
730 wait_pid == static_cast<::pid_t>(GetID()));
733 "waitpid ({0}, &status, _) => pid = {1}, status = {2}, exited = {3}",
734 GetID(), wait_pid, status, exited);
737 MonitorExited(wait_pid, wait_status);
739 assert(wait_status.type == WaitStatus::Stop);
740 MonitorCallback(wait_pid, wait_status.status);
744 bool NativeProcessNetBSD::HasThreadNoLock(lldb::tid_t thread_id) {
745 for (const auto &thread : m_threads) {
746 assert(thread && "thread list should not contain NULL threads");
747 if (thread->GetID() == thread_id) {
748 // We have this thread.
753 // We don't have this thread.
757 NativeThreadNetBSD &NativeProcessNetBSD::AddThread(lldb::tid_t thread_id) {
759 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
760 LLDB_LOG(log, "pid {0} adding thread with tid {1}", GetID(), thread_id);
762 assert(!HasThreadNoLock(thread_id) &&
763 "attempted to add a thread by id that already exists");
765 // If this is the first thread, save it as the current thread
766 if (m_threads.empty())
767 SetCurrentThreadID(thread_id);
769 m_threads.push_back(llvm::make_unique<NativeThreadNetBSD>(*this, thread_id));
770 return static_cast<NativeThreadNetBSD &>(*m_threads.back());
773 Status NativeProcessNetBSD::Attach() {
774 // Attach to the requested process.
775 // An attach will cause the thread to stop with a SIGSTOP.
776 Status status = PtraceWrapper(PT_ATTACH, m_pid);
781 // Need to use WALLSIG otherwise we receive an error with errno=ECHLD
782 // At this point we should have a thread stopped if waitpid succeeds.
783 if ((wstatus = waitpid(m_pid, NULL, WALLSIG)) < 0)
784 return Status(errno, eErrorTypePOSIX);
786 /* Initialize threads */
787 status = ReinitializeThreads();
791 for (const auto &thread : m_threads)
792 static_cast<NativeThreadNetBSD &>(*thread).SetStoppedBySignal(SIGSTOP);
794 // Let our process instance know the thread has stopped.
795 SetState(StateType::eStateStopped);
799 Status NativeProcessNetBSD::ReadMemory(lldb::addr_t addr, void *buf,
800 size_t size, size_t &bytes_read) {
801 unsigned char *dst = static_cast<unsigned char *>(buf);
802 struct ptrace_io_desc io;
804 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY));
805 LLDB_LOG(log, "addr = {0}, buf = {1}, size = {2}", addr, buf, size);
808 io.piod_op = PIOD_READ_D;
812 io.piod_offs = (void *)(addr + bytes_read);
813 io.piod_addr = dst + bytes_read;
815 Status error = NativeProcessNetBSD::PtraceWrapper(PT_IO, GetID(), &io);
819 bytes_read = io.piod_len;
820 io.piod_len = size - bytes_read;
821 } while (bytes_read < size);
826 Status NativeProcessNetBSD::ReadMemoryWithoutTrap(lldb::addr_t addr, void *buf,
828 size_t &bytes_read) {
829 Status error = ReadMemory(addr, buf, size, bytes_read);
832 return m_breakpoint_list.RemoveTrapsFromBuffer(addr, buf, size);
835 Status NativeProcessNetBSD::WriteMemory(lldb::addr_t addr, const void *buf,
836 size_t size, size_t &bytes_written) {
837 const unsigned char *src = static_cast<const unsigned char *>(buf);
839 struct ptrace_io_desc io;
841 Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY));
842 LLDB_LOG(log, "addr = {0}, buf = {1}, size = {2}", addr, buf, size);
845 io.piod_op = PIOD_WRITE_D;
849 io.piod_addr = const_cast<void *>(static_cast<const void *>(src + bytes_written));
850 io.piod_offs = (void *)(addr + bytes_written);
852 Status error = NativeProcessNetBSD::PtraceWrapper(PT_IO, GetID(), &io);
856 bytes_written = io.piod_len;
857 io.piod_len = size - bytes_written;
858 } while (bytes_written < size);
863 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
864 NativeProcessNetBSD::GetAuxvData() const {
866 * ELF_AUX_ENTRIES is currently restricted to kernel
867 * (<sys/exec_elf.h> r. 1.155 specifies 15)
869 * ptrace(2) returns the whole AUXV including extra fiels after AT_NULL this
870 * information isn't needed.
872 size_t auxv_size = 100 * sizeof(AuxInfo);
874 ErrorOr<std::unique_ptr<MemoryBuffer>> buf =
875 llvm::MemoryBuffer::getNewMemBuffer(auxv_size);
877 struct ptrace_io_desc io;
878 io.piod_op = PIOD_READ_AUXV;
880 io.piod_addr = const_cast<void *>(static_cast<const void *>(buf.get()->getBufferStart()));
881 io.piod_len = auxv_size;
883 Status error = NativeProcessNetBSD::PtraceWrapper(PT_IO, GetID(), &io);
886 return std::error_code(error.GetError(), std::generic_category());
889 return std::error_code(ECANCELED, std::generic_category());
894 Status NativeProcessNetBSD::ReinitializeThreads() {
898 // Initialize new thread
899 struct ptrace_lwpinfo info = {};
900 Status error = PtraceWrapper(PT_LWPINFO, GetID(), &info, sizeof(info));
904 // Reinitialize from scratch threads and register them in process
905 while (info.pl_lwpid != 0) {
906 AddThread(info.pl_lwpid);
907 error = PtraceWrapper(PT_LWPINFO, GetID(), &info, sizeof(info));