Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 627 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp b/gnu/llvm/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
new file mode 100644
index 00000000000..0a49f96f54a
--- /dev/null
+++ b/gnu/llvm/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
@@ -0,0 +1,627 @@
+//===-- FreeBSDThread.cpp ---------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <errno.h>
+#include <pthread.h>
+#include <pthread_np.h>
+#include <stdlib.h>
+#include <sys/sysctl.h>
+#include <sys/types.h>
+#include <sys/user.h>
+
+#include "lldb/Target/UnixSignals.h"
+#include "lldb/Utility/State.h"
+
+#include "FreeBSDThread.h"
+#include "POSIXStopInfo.h"
+#include "Plugins/Process/POSIX/ProcessPOSIXLog.h"
+#include "Plugins/Process/Utility/RegisterContextFreeBSD_i386.h"
+#include "Plugins/Process/Utility/RegisterContextFreeBSD_mips64.h"
+#include "Plugins/Process/Utility/RegisterContextFreeBSD_powerpc.h"
+#include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h"
+#include "Plugins/Process/Utility/RegisterInfoPOSIX_arm.h"
+#include "Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h"
+#include "Plugins/Process/Utility/UnwindLLDB.h"
+#include "ProcessFreeBSD.h"
+#include "ProcessMonitor.h"
+#include "RegisterContextPOSIXProcessMonitor_arm.h"
+#include "RegisterContextPOSIXProcessMonitor_arm64.h"
+#include "RegisterContextPOSIXProcessMonitor_mips64.h"
+#include "RegisterContextPOSIXProcessMonitor_powerpc.h"
+#include "RegisterContextPOSIXProcessMonitor_x86.h"
+#include "lldb/Breakpoint/BreakpointLocation.h"
+#include "lldb/Breakpoint/Watchpoint.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Host/Host.h"
+#include "lldb/Host/HostInfo.h"
+#include "lldb/Host/HostNativeThread.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/StopInfo.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/ThreadSpec.h"
+#include "lldb/Utility/State.h"
+#include "llvm/ADT/SmallString.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+FreeBSDThread::FreeBSDThread(Process &process, lldb::tid_t tid)
+    : Thread(process, tid), m_frame_up(), m_breakpoint(),
+      m_thread_name_valid(false), m_thread_name(), m_posix_thread(nullptr) {
+  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
+  LLDB_LOGV(log, "tid = {0}", tid);
+
+  // Set the current watchpoints for this thread.
+  Target &target = GetProcess()->GetTarget();
+  const WatchpointList &wp_list = target.GetWatchpointList();
+  size_t wp_size = wp_list.GetSize();
+
+  for (uint32_t wp_idx = 0; wp_idx < wp_size; wp_idx++) {
+    lldb::WatchpointSP wp = wp_list.GetByIndex(wp_idx);
+    if (wp.get() && wp->IsEnabled()) {
+      // This watchpoint as been enabled; obviously this "new" thread has been
+      // created since that watchpoint was enabled.  Since the
+      // POSIXBreakpointProtocol has yet to be initialized, its
+      // m_watchpoints_initialized member will be FALSE.  Attempting to read
+      // the debug status register to determine if a watchpoint has been hit
+      // would result in the zeroing of that register. Since the active debug
+      // registers would have been cloned when this thread was created, simply
+      // force the m_watchpoints_initized member to TRUE and avoid resetting
+      // dr6 and dr7.
+      GetPOSIXBreakpointProtocol()->ForceWatchpointsInitialized();
+    }
+  }
+}
+
+FreeBSDThread::~FreeBSDThread() { DestroyThread(); }
+
+ProcessMonitor &FreeBSDThread::GetMonitor() {
+  ProcessSP base = GetProcess();
+  ProcessFreeBSD &process = static_cast<ProcessFreeBSD &>(*base);
+  return process.GetMonitor();
+}
+
+void FreeBSDThread::RefreshStateAfterStop() {
+  // Invalidate all registers in our register context. We don't set "force" to
+  // true because the stop reply packet might have had some register values
+  // that were expedited and these will already be copied into the register
+  // context by the time this function gets called. The KDPRegisterContext
+  // class has been made smart enough to detect when it needs to invalidate
+  // which registers are valid by putting hooks in the register read and
+  // register supply functions where they check the process stop ID and do the
+  // right thing. if (StateIsStoppedState(GetState())
+  {
+    const bool force = false;
+    GetRegisterContext()->InvalidateIfNeeded(force);
+  }
+}
+
+const char *FreeBSDThread::GetInfo() { return nullptr; }
+
+void FreeBSDThread::SetName(const char *name) {
+  m_thread_name_valid = (name && name[0]);
+  if (m_thread_name_valid)
+    m_thread_name.assign(name);
+  else
+    m_thread_name.clear();
+}
+
+const char *FreeBSDThread::GetName() {
+  if (!m_thread_name_valid) {
+    m_thread_name.clear();
+    int pid = GetProcess()->GetID();
+
+    struct kinfo_proc *kp = nullptr, *nkp;
+    size_t len = 0;
+    int error;
+    int ctl[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID | KERN_PROC_INC_THREAD,
+                  pid};
+
+    while (1) {
+      error = sysctl(ctl, 4, kp, &len, nullptr, 0);
+      if (kp == nullptr || (error != 0 && errno == ENOMEM)) {
+        // Add extra space in case threads are added before next call.
+        len += sizeof(*kp) + len / 10;
+        nkp = (struct kinfo_proc *)realloc(kp, len);
+        if (nkp == nullptr) {
+          free(kp);
+          return nullptr;
+        }
+        kp = nkp;
+        continue;
+      }
+      if (error != 0)
+        len = 0;
+      break;
+    }
+
+    for (size_t i = 0; i < len / sizeof(*kp); i++) {
+      if (kp[i].ki_tid == (lwpid_t)GetID()) {
+        m_thread_name.append(kp[i].ki_tdname,
+                             kp[i].ki_tdname + strlen(kp[i].ki_tdname));
+        break;
+      }
+    }
+    free(kp);
+    m_thread_name_valid = true;
+  }
+
+  if (m_thread_name.empty())
+    return nullptr;
+  return m_thread_name.c_str();
+}
+
+lldb::RegisterContextSP FreeBSDThread::GetRegisterContext() {
+  if (!m_reg_context_sp) {
+    m_posix_thread = nullptr;
+
+    RegisterInfoInterface *reg_interface = nullptr;
+    const ArchSpec &target_arch = GetProcess()->GetTarget().GetArchitecture();
+
+    assert(target_arch.GetTriple().getOS() == llvm::Triple::FreeBSD);
+    switch (target_arch.GetMachine()) {
+    case llvm::Triple::aarch64:
+      reg_interface = new RegisterInfoPOSIX_arm64(target_arch);
+      break;
+    case llvm::Triple::arm:
+      reg_interface = new RegisterInfoPOSIX_arm(target_arch);
+      break;
+    case llvm::Triple::ppc:
+#ifndef __powerpc64__
+      reg_interface = new RegisterContextFreeBSD_powerpc32(target_arch);
+      break;
+#endif
+    case llvm::Triple::ppc64:
+      reg_interface = new RegisterContextFreeBSD_powerpc64(target_arch);
+      break;
+    case llvm::Triple::mips64:
+      reg_interface = new RegisterContextFreeBSD_mips64(target_arch);
+      break;
+    case llvm::Triple::x86:
+      reg_interface = new RegisterContextFreeBSD_i386(target_arch);
+      break;
+    case llvm::Triple::x86_64:
+      reg_interface = new RegisterContextFreeBSD_x86_64(target_arch);
+      break;
+    default:
+      llvm_unreachable("CPU not supported");
+    }
+
+    switch (target_arch.GetMachine()) {
+    case llvm::Triple::aarch64: {
+      RegisterContextPOSIXProcessMonitor_arm64 *reg_ctx =
+          new RegisterContextPOSIXProcessMonitor_arm64(*this, 0, reg_interface);
+      m_posix_thread = reg_ctx;
+      m_reg_context_sp.reset(reg_ctx);
+      break;
+    }
+    case llvm::Triple::arm: {
+      RegisterContextPOSIXProcessMonitor_arm *reg_ctx =
+          new RegisterContextPOSIXProcessMonitor_arm(*this, 0, reg_interface);
+      m_posix_thread = reg_ctx;
+      m_reg_context_sp.reset(reg_ctx);
+      break;
+    }
+    case llvm::Triple::mips64: {
+      RegisterContextPOSIXProcessMonitor_mips64 *reg_ctx =
+          new RegisterContextPOSIXProcessMonitor_mips64(*this, 0,
+                                                        reg_interface);
+      m_posix_thread = reg_ctx;
+      m_reg_context_sp.reset(reg_ctx);
+      break;
+    }
+    case llvm::Triple::ppc:
+    case llvm::Triple::ppc64: {
+      RegisterContextPOSIXProcessMonitor_powerpc *reg_ctx =
+          new RegisterContextPOSIXProcessMonitor_powerpc(*this, 0,
+                                                         reg_interface);
+      m_posix_thread = reg_ctx;
+      m_reg_context_sp.reset(reg_ctx);
+      break;
+    }
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64: {
+      RegisterContextPOSIXProcessMonitor_x86_64 *reg_ctx =
+          new RegisterContextPOSIXProcessMonitor_x86_64(*this, 0,
+                                                        reg_interface);
+      m_posix_thread = reg_ctx;
+      m_reg_context_sp.reset(reg_ctx);
+      break;
+    }
+    default:
+      break;
+    }
+  }
+  return m_reg_context_sp;
+}
+
+lldb::RegisterContextSP
+FreeBSDThread::CreateRegisterContextForFrame(lldb_private::StackFrame *frame) {
+  lldb::RegisterContextSP reg_ctx_sp;
+  uint32_t concrete_frame_idx = 0;
+
+  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
+  LLDB_LOGV(log, "called");
+
+  if (frame)
+    concrete_frame_idx = frame->GetConcreteFrameIndex();
+
+  if (concrete_frame_idx == 0)
+    reg_ctx_sp = GetRegisterContext();
+  else {
+    assert(GetUnwinder());
+    reg_ctx_sp = GetUnwinder()->CreateRegisterContextForFrame(frame);
+  }
+
+  return reg_ctx_sp;
+}
+
+lldb::addr_t FreeBSDThread::GetThreadPointer() {
+  ProcessMonitor &monitor = GetMonitor();
+  addr_t addr;
+  if (monitor.ReadThreadPointer(GetID(), addr))
+    return addr;
+  else
+    return LLDB_INVALID_ADDRESS;
+}
+
+bool FreeBSDThread::CalculateStopInfo() {
+  SetStopInfo(m_stop_info_sp);
+  return true;
+}
+
+Unwind *FreeBSDThread::GetUnwinder() {
+  if (!m_unwinder_up)
+    m_unwinder_up.reset(new UnwindLLDB(*this));
+
+  return m_unwinder_up.get();
+}
+
+void FreeBSDThread::DidStop() {
+  // Don't set the thread state to stopped unless we really stopped.
+}
+
+void FreeBSDThread::WillResume(lldb::StateType resume_state) {
+  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
+  LLDB_LOGF(log, "tid %lu resume_state = %s", GetID(),
+            lldb_private::StateAsCString(resume_state));
+  ProcessSP process_sp(GetProcess());
+  ProcessFreeBSD *process = static_cast<ProcessFreeBSD *>(process_sp.get());
+  int signo = GetResumeSignal();
+  bool signo_valid = process->GetUnixSignals()->SignalIsValid(signo);
+
+  switch (resume_state) {
+  case eStateSuspended:
+  case eStateStopped:
+    process->m_suspend_tids.push_back(GetID());
+    break;
+  case eStateRunning:
+    process->m_run_tids.push_back(GetID());
+    if (signo_valid)
+      process->m_resume_signo = signo;
+    break;
+  case eStateStepping:
+    process->m_step_tids.push_back(GetID());
+    if (signo_valid)
+      process->m_resume_signo = signo;
+    break;
+  default:
+    break;
+  }
+}
+
+bool FreeBSDThread::Resume() {
+  lldb::StateType resume_state = GetResumeState();
+  ProcessMonitor &monitor = GetMonitor();
+  bool status;
+
+  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
+  LLDB_LOGF(log, "FreeBSDThread::%s (), resume_state = %s", __FUNCTION__,
+            StateAsCString(resume_state));
+
+  switch (resume_state) {
+  default:
+    assert(false && "Unexpected state for resume!");
+    status = false;
+    break;
+
+  case lldb::eStateRunning:
+    SetState(resume_state);
+    status = monitor.Resume(GetID(), GetResumeSignal());
+    break;
+
+  case lldb::eStateStepping:
+    SetState(resume_state);
+    status = monitor.SingleStep(GetID(), GetResumeSignal());
+    break;
+  case lldb::eStateStopped:
+  case lldb::eStateSuspended:
+    status = true;
+    break;
+  }
+
+  return status;
+}
+
+void FreeBSDThread::Notify(const ProcessMessage &message) {
+  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
+  LLDB_LOGF(log, "FreeBSDThread::%s () message kind = '%s' for tid %" PRIu64,
+            __FUNCTION__, message.PrintKind(), GetID());
+
+  switch (message.GetKind()) {
+  default:
+    assert(false && "Unexpected message kind!");
+    break;
+
+  case ProcessMessage::eExitMessage:
+    // Nothing to be done.
+    break;
+
+  case ProcessMessage::eLimboMessage:
+    LimboNotify(message);
+    break;
+
+  case ProcessMessage::eCrashMessage:
+  case ProcessMessage::eSignalMessage:
+    SignalNotify(message);
+    break;
+
+  case ProcessMessage::eSignalDeliveredMessage:
+    SignalDeliveredNotify(message);
+    break;
+
+  case ProcessMessage::eTraceMessage:
+    TraceNotify(message);
+    break;
+
+  case ProcessMessage::eBreakpointMessage:
+    BreakNotify(message);
+    break;
+
+  case ProcessMessage::eWatchpointMessage:
+    WatchNotify(message);
+    break;
+
+  case ProcessMessage::eExecMessage:
+    ExecNotify(message);
+    break;
+  }
+}
+
+bool FreeBSDThread::EnableHardwareWatchpoint(Watchpoint *wp) {
+  bool wp_set = false;
+  if (wp) {
+    addr_t wp_addr = wp->GetLoadAddress();
+    size_t wp_size = wp->GetByteSize();
+    bool wp_read = wp->WatchpointRead();
+    bool wp_write = wp->WatchpointWrite();
+    uint32_t wp_hw_index = wp->GetHardwareIndex();
+    POSIXBreakpointProtocol *reg_ctx = GetPOSIXBreakpointProtocol();
+    if (reg_ctx)
+      wp_set = reg_ctx->SetHardwareWatchpointWithIndex(
+          wp_addr, wp_size, wp_read, wp_write, wp_hw_index);
+  }
+  return wp_set;
+}
+
+bool FreeBSDThread::DisableHardwareWatchpoint(Watchpoint *wp) {
+  bool result = false;
+  if (wp) {
+    lldb::RegisterContextSP reg_ctx_sp = GetRegisterContext();
+    if (reg_ctx_sp.get())
+      result = reg_ctx_sp->ClearHardwareWatchpoint(wp->GetHardwareIndex());
+  }
+  return result;
+}
+
+uint32_t FreeBSDThread::NumSupportedHardwareWatchpoints() {
+  lldb::RegisterContextSP reg_ctx_sp = GetRegisterContext();
+  if (reg_ctx_sp.get())
+    return reg_ctx_sp->NumSupportedHardwareWatchpoints();
+  return 0;
+}
+
+uint32_t FreeBSDThread::FindVacantWatchpointIndex() {
+  uint32_t hw_index = LLDB_INVALID_INDEX32;
+  uint32_t num_hw_wps = NumSupportedHardwareWatchpoints();
+  uint32_t wp_idx;
+  POSIXBreakpointProtocol *reg_ctx = GetPOSIXBreakpointProtocol();
+  if (reg_ctx) {
+    for (wp_idx = 0; wp_idx < num_hw_wps; wp_idx++) {
+      if (reg_ctx->IsWatchpointVacant(wp_idx)) {
+        hw_index = wp_idx;
+        break;
+      }
+    }
+  }
+  return hw_index;
+}
+
+void FreeBSDThread::BreakNotify(const ProcessMessage &message) {
+  bool status;
+  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
+
+  assert(GetRegisterContext());
+  status = GetPOSIXBreakpointProtocol()->UpdateAfterBreakpoint();
+  assert(status && "Breakpoint update failed!");
+
+  // With our register state restored, resolve the breakpoint object
+  // corresponding to our current PC.
+  assert(GetRegisterContext());
+  lldb::addr_t pc = GetRegisterContext()->GetPC();
+  LLDB_LOGF(log, "FreeBSDThread::%s () PC=0x%8.8" PRIx64, __FUNCTION__, pc);
+  lldb::BreakpointSiteSP bp_site(
+      GetProcess()->GetBreakpointSiteList().FindByAddress(pc));
+
+  // If the breakpoint is for this thread, then we'll report the hit, but if it
+  // is for another thread, we create a stop reason with should_stop=false.  If
+  // there is no breakpoint location, then report an invalid stop reason. We
+  // don't need to worry about stepping over the breakpoint here, that will be
+  // taken care of when the thread resumes and notices that there's a
+  // breakpoint under the pc.
+  if (bp_site) {
+    lldb::break_id_t bp_id = bp_site->GetID();
+    // If we have an operating system plug-in, we might have set a thread
+    // specific breakpoint using the operating system thread ID, so we can't
+    // make any assumptions about the thread ID so we must always report the
+    // breakpoint regardless of the thread.
+    if (bp_site->ValidForThisThread(this) ||
+        GetProcess()->GetOperatingSystem() != nullptr)
+      SetStopInfo(StopInfo::CreateStopReasonWithBreakpointSiteID(*this, bp_id));
+    else {
+      const bool should_stop = false;
+      SetStopInfo(StopInfo::CreateStopReasonWithBreakpointSiteID(*this, bp_id,
+                                                                 should_stop));
+    }
+  } else
+    SetStopInfo(StopInfoSP());
+}
+
+void FreeBSDThread::WatchNotify(const ProcessMessage &message) {
+  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
+
+  lldb::addr_t halt_addr = message.GetHWAddress();
+  LLDB_LOGF(log,
+            "FreeBSDThread::%s () Hardware Watchpoint Address = 0x%8.8" PRIx64,
+            __FUNCTION__, halt_addr);
+
+  POSIXBreakpointProtocol *reg_ctx = GetPOSIXBreakpointProtocol();
+  if (reg_ctx) {
+    uint32_t num_hw_wps = reg_ctx->NumSupportedHardwareWatchpoints();
+    uint32_t wp_idx;
+    for (wp_idx = 0; wp_idx < num_hw_wps; wp_idx++) {
+      if (reg_ctx->IsWatchpointHit(wp_idx)) {
+        // Clear the watchpoint hit here
+        reg_ctx->ClearWatchpointHits();
+        break;
+      }
+    }
+
+    if (wp_idx == num_hw_wps)
+      return;
+
+    Target &target = GetProcess()->GetTarget();
+    lldb::addr_t wp_monitor_addr = reg_ctx->GetWatchpointAddress(wp_idx);
+    const WatchpointList &wp_list = target.GetWatchpointList();
+    lldb::WatchpointSP wp_sp = wp_list.FindByAddress(wp_monitor_addr);
+
+    assert(wp_sp.get() && "No watchpoint found");
+    SetStopInfo(
+        StopInfo::CreateStopReasonWithWatchpointID(*this, wp_sp->GetID()));
+  }
+}
+
+void FreeBSDThread::TraceNotify(const ProcessMessage &message) {
+  Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD));
+
+  // Try to resolve the breakpoint object corresponding to the current PC.
+  assert(GetRegisterContext());
+  lldb::addr_t pc = GetRegisterContext()->GetPC();
+  LLDB_LOGF(log, "FreeBSDThread::%s () PC=0x%8.8" PRIx64, __FUNCTION__, pc);
+  lldb::BreakpointSiteSP bp_site(
+      GetProcess()->GetBreakpointSiteList().FindByAddress(pc));
+
+  // If the current pc is a breakpoint site then set the StopInfo to
+  // Breakpoint. Otherwise, set the StopInfo to Watchpoint or Trace. If we have
+  // an operating system plug-in, we might have set a thread specific
+  // breakpoint using the operating system thread ID, so we can't make any
+  // assumptions about the thread ID so we must always report the breakpoint
+  // regardless of the thread.
+  if (bp_site && (bp_site->ValidForThisThread(this) ||
+                  GetProcess()->GetOperatingSystem() != nullptr))
+    SetStopInfo(StopInfo::CreateStopReasonWithBreakpointSiteID(
+        *this, bp_site->GetID()));
+  else {
+    POSIXBreakpointProtocol *reg_ctx = GetPOSIXBreakpointProtocol();
+    if (reg_ctx) {
+      uint32_t num_hw_wps = reg_ctx->NumSupportedHardwareWatchpoints();
+      uint32_t wp_idx;
+      for (wp_idx = 0; wp_idx < num_hw_wps; wp_idx++) {
+        if (reg_ctx->IsWatchpointHit(wp_idx)) {
+          WatchNotify(message);
+          return;
+        }
+      }
+    }
+    SetStopInfo(StopInfo::CreateStopReasonToTrace(*this));
+  }
+}
+
+void FreeBSDThread::LimboNotify(const ProcessMessage &message) {
+  SetStopInfo(lldb::StopInfoSP(new POSIXLimboStopInfo(*this)));
+}
+
+void FreeBSDThread::SignalNotify(const ProcessMessage &message) {
+  int signo = message.GetSignal();
+  if (message.GetKind() == ProcessMessage::eCrashMessage) {
+    std::string stop_description = GetCrashReasonString(
+        message.GetCrashReason(), message.GetFaultAddress());
+    SetStopInfo(StopInfo::CreateStopReasonWithSignal(
+        *this, signo, stop_description.c_str()));
+  } else {
+    SetStopInfo(StopInfo::CreateStopReasonWithSignal(*this, signo));
+  }
+}
+
+void FreeBSDThread::SignalDeliveredNotify(const ProcessMessage &message) {
+  int signo = message.GetSignal();
+  SetStopInfo(StopInfo::CreateStopReasonWithSignal(*this, signo));
+}
+
+unsigned FreeBSDThread::GetRegisterIndexFromOffset(unsigned offset) {
+  unsigned reg = LLDB_INVALID_REGNUM;
+  ArchSpec arch = HostInfo::GetArchitecture();
+
+  switch (arch.GetMachine()) {
+  default:
+    llvm_unreachable("CPU type not supported!");
+    break;
+
+  case llvm::Triple::aarch64:
+  case llvm::Triple::arm:
+  case llvm::Triple::mips64:
+  case llvm::Triple::ppc:
+  case llvm::Triple::ppc64:
+  case llvm::Triple::x86:
+  case llvm::Triple::x86_64: {
+    POSIXBreakpointProtocol *reg_ctx = GetPOSIXBreakpointProtocol();
+    reg = reg_ctx->GetRegisterIndexFromOffset(offset);
+  } break;
+  }
+  return reg;
+}
+
+void FreeBSDThread::ExecNotify(const ProcessMessage &message) {
+  SetStopInfo(StopInfo::CreateStopReasonWithExec(*this));
+}
+
+const char *FreeBSDThread::GetRegisterName(unsigned reg) {
+  const char *name = nullptr;
+  ArchSpec arch = HostInfo::GetArchitecture();
+
+  switch (arch.GetMachine()) {
+  default:
+    assert(false && "CPU type not supported!");
+    break;
+
+  case llvm::Triple::aarch64:
+  case llvm::Triple::arm:
+  case llvm::Triple::mips64:
+  case llvm::Triple::ppc:
+  case llvm::Triple::ppc64:
+  case llvm::Triple::x86:
+  case llvm::Triple::x86_64:
+    name = GetRegisterContext()->GetRegisterName(reg);
+    break;
+  }
+  return name;
+}
+
+const char *FreeBSDThread::GetRegisterNameFromOffset(unsigned offset) {
+  return GetRegisterName(GetRegisterIndexFromOffset(offset));
+}