Index: lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.h =================================================================== --- lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.h +++ lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.h @@ -49,11 +49,6 @@ size_t GetSoftwareBreakpointTrapOpcode(Target &target, BreakpointSite *bp_site) override; - Status LaunchProcess(ProcessLaunchInfo &launch_info) override; - - lldb::ProcessSP Attach(ProcessAttachInfo &attach_info, Debugger &debugger, - Target *target, Status &error) override; - void CalculateTrapHandlerSymbolNames() override; MmapArgList GetMmapArgumentList(const ArchSpec &arch, lldb::addr_t addr, Index: lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp =================================================================== --- lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp +++ lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp @@ -246,58 +246,15 @@ } } -Status PlatformFreeBSD::LaunchProcess(ProcessLaunchInfo &launch_info) { - Status error; - if (IsHost()) { - error = Platform::LaunchProcess(launch_info); - } else { - if (m_remote_platform_sp) - error = m_remote_platform_sp->LaunchProcess(launch_info); - else - error.SetErrorString("the platform is not currently connected"); - } - return error; -} - -lldb::ProcessSP PlatformFreeBSD::Attach(ProcessAttachInfo &attach_info, - Debugger &debugger, Target *target, - Status &error) { - lldb::ProcessSP process_sp; - if (IsHost()) { - if (target == nullptr) { - TargetSP new_target_sp; - ArchSpec emptyArchSpec; - - error = debugger.GetTargetList().CreateTarget( - debugger, "", emptyArchSpec, eLoadDependentsNo, m_remote_platform_sp, - new_target_sp); - target = new_target_sp.get(); - } else - error.Clear(); - - if (target && error.Success()) { - debugger.GetTargetList().SetSelectedTarget(target); - // The freebsd always currently uses the GDB remote debugger plug-in so - // even when debugging locally we are debugging remotely! Just like the - // darwin plugin. - process_sp = target->CreateProcess( - attach_info.GetListenerForProcess(debugger), "gdb-remote", nullptr); - - if (process_sp) - error = process_sp->Attach(attach_info); +bool PlatformFreeBSD::CanDebugProcess() { + if (getenv("FREEBSD_REMOTE_PLUGIN")) { + if (IsHost()) { + return true; + } else { + // If we're connected, we can debug. + return IsConnected(); } - } else { - if (m_remote_platform_sp) - process_sp = - m_remote_platform_sp->Attach(attach_info, debugger, target, error); - else - error.SetErrorString("the platform is not currently connected"); } - return process_sp; -} - -// FreeBSD processes cannot yet be launched by spawning and attaching. -bool PlatformFreeBSD::CanDebugProcess() { return false; } Index: lldb/source/Plugins/Process/CMakeLists.txt =================================================================== --- lldb/source/Plugins/Process/CMakeLists.txt +++ lldb/source/Plugins/Process/CMakeLists.txt @@ -2,6 +2,7 @@ add_subdirectory(Linux) add_subdirectory(POSIX) elseif (CMAKE_SYSTEM_NAME MATCHES "FreeBSD") + add_subdirectory(FreeBSDRemote) add_subdirectory(FreeBSD) add_subdirectory(POSIX) elseif (CMAKE_SYSTEM_NAME MATCHES "NetBSD") Index: lldb/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp =================================================================== --- lldb/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp +++ lldb/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp @@ -79,12 +79,14 @@ } void ProcessFreeBSD::Initialize() { - static llvm::once_flag g_once_flag; + if (!getenv("FREEBSD_REMOTE_PLUGIN")) { + static llvm::once_flag g_once_flag; - llvm::call_once(g_once_flag, []() { - PluginManager::RegisterPlugin(GetPluginNameStatic(), - GetPluginDescriptionStatic(), CreateInstance); - }); + llvm::call_once(g_once_flag, []() { + PluginManager::RegisterPlugin(GetPluginNameStatic(), + GetPluginDescriptionStatic(), CreateInstance); + }); + } } lldb_private::ConstString ProcessFreeBSD::GetPluginNameStatic() { Index: lldb/source/Plugins/Process/FreeBSDRemote/CMakeLists.txt =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/CMakeLists.txt @@ -0,0 +1,16 @@ +add_lldb_library(lldbPluginProcessFreeBSDRemote + NativeProcessFreeBSD.cpp + NativeRegisterContextFreeBSD.cpp + NativeRegisterContextFreeBSD_x86_64.cpp + NativeThreadFreeBSD.cpp + + LINK_LIBS + lldbHost + lldbSymbol + lldbTarget + lldbUtility + lldbPluginProcessPOSIX + lldbPluginProcessUtility + LINK_COMPONENTS + Support + ) Index: lldb/source/Plugins/Process/FreeBSDRemote/NativeProcessFreeBSD.h =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/NativeProcessFreeBSD.h @@ -0,0 +1,121 @@ +//===-- NativeProcessFreeBSD.h -------------------------------- -*- 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 +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeProcessFreeBSD_H_ +#define liblldb_NativeProcessFreeBSD_H_ + +#include "Plugins/Process/POSIX/NativeProcessELF.h" +#include "lldb/Target/MemoryRegionInfo.h" +#include "lldb/Utility/ArchSpec.h" +#include "lldb/Utility/FileSpec.h" + +#include "NativeThreadFreeBSD.h" + +namespace lldb_private { +namespace process_freebsd { +/// \class NativeProcessFreeBSD +/// Manages communication with the inferior (debugee) process. +/// +/// Upon construction, this class prepares and launches an inferior process +/// for debugging. +/// +/// Changes in the inferior process state are broadcasted. +class NativeProcessFreeBSD : public NativeProcessELF { +public: + class Factory : public NativeProcessProtocol::Factory { + public: + llvm::Expected> + Launch(ProcessLaunchInfo &launch_info, NativeDelegate &native_delegate, + MainLoop &mainloop) const override; + + llvm::Expected> + Attach(lldb::pid_t pid, NativeDelegate &native_delegate, + MainLoop &mainloop) const override; + }; + + // NativeProcessProtocol Interface + Status Resume(const ResumeActionList &resume_actions) override; + + Status Halt() override; + + Status Detach() override; + + Status Signal(int signo) override; + + Status Interrupt() override; + + Status Kill() override; + + Status GetMemoryRegionInfo(lldb::addr_t load_addr, + MemoryRegionInfo &range_info) override; + + Status ReadMemory(lldb::addr_t addr, void *buf, size_t size, + size_t &bytes_read) override; + + Status WriteMemory(lldb::addr_t addr, const void *buf, size_t size, + size_t &bytes_written) override; + + Status AllocateMemory(size_t size, uint32_t permissions, + lldb::addr_t &addr) override; + + Status DeallocateMemory(lldb::addr_t addr) override; + + lldb::addr_t GetSharedLibraryInfoAddress() override; + + size_t UpdateThreads() override; + + const ArchSpec &GetArchitecture() const override { return m_arch; } + + Status SetBreakpoint(lldb::addr_t addr, uint32_t size, + bool hardware) override; + + Status GetLoadedModuleFileSpec(const char *module_path, + FileSpec &file_spec) override; + + Status GetFileLoadAddress(const llvm::StringRef &file_name, + lldb::addr_t &load_addr) override; + + llvm::ErrorOr> + GetAuxvData() const override; + + // Interface used by NativeRegisterContext-derived classes. + static Status PtraceWrapper(int req, lldb::pid_t pid, void *addr = nullptr, + int data = 0, int *result = nullptr); + +private: + MainLoop::SignalHandleUP m_sigchld_handle; + ArchSpec m_arch; + LazyBool m_supports_mem_region = eLazyBoolCalculate; + std::vector> m_mem_region_cache; + + // Private Instance Methods + NativeProcessFreeBSD(::pid_t pid, int terminal_fd, NativeDelegate &delegate, + const ArchSpec &arch, MainLoop &mainloop); + + bool HasThreadNoLock(lldb::tid_t thread_id); + + NativeThreadFreeBSD &AddThread(lldb::tid_t thread_id); + void RemoveThread(lldb::tid_t thread_id); + + void MonitorCallback(lldb::pid_t pid, int signal); + void MonitorExited(lldb::pid_t pid, WaitStatus status); + void MonitorSIGSTOP(lldb::pid_t pid); + void MonitorSIGTRAP(lldb::pid_t pid); + void MonitorSignal(lldb::pid_t pid, int signal); + + Status PopulateMemoryRegionCache(); + void SigchldHandler(); + + Status Attach(); + Status ReinitializeThreads(); +}; + +} // namespace process_freebsd +} // namespace lldb_private + +#endif // #ifndef liblldb_NativeProcessFreeBSD_H_ Index: lldb/source/Plugins/Process/FreeBSDRemote/NativeProcessFreeBSD.cpp =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/NativeProcessFreeBSD.cpp @@ -0,0 +1,781 @@ +//===-- NativeProcessFreeBSD.cpp ------------------------------------------===// +// +// 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 "NativeProcessFreeBSD.h" + +// clang-format off +#include +#include +#include +#include +#include +#include +// clang-format on + +#include "Plugins/Process/POSIX/ProcessPOSIXLog.h" +#include "lldb/Host/HostProcess.h" +#include "lldb/Host/posix/ProcessLauncherPosixFork.h" +#include "lldb/Target/Process.h" +#include "lldb/Utility/State.h" +#include "llvm/Support/Errno.h" + +using namespace lldb; +using namespace lldb_private; +using namespace lldb_private::process_freebsd; +using namespace llvm; + +// Simple helper function to ensure flags are enabled on the given file +// descriptor. +static Status EnsureFDFlags(int fd, int flags) { + Status error; + + int status = fcntl(fd, F_GETFL); + if (status == -1) { + error.SetErrorToErrno(); + return error; + } + + if (fcntl(fd, F_SETFL, status | flags) == -1) { + error.SetErrorToErrno(); + return error; + } + + return error; +} + +// Public Static Methods + +llvm::Expected> +NativeProcessFreeBSD::Factory::Launch(ProcessLaunchInfo &launch_info, + NativeDelegate &native_delegate, + MainLoop &mainloop) const { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + + Status status; + ::pid_t pid = ProcessLauncherPosixFork() + .LaunchProcess(launch_info, status) + .GetProcessId(); + LLDB_LOG(log, "pid = {0:x}", pid); + if (status.Fail()) { + LLDB_LOG(log, "failed to launch process: {0}", status); + return status.ToError(); + } + + // Wait for the child process to trap on its call to execve. + int wstatus; + ::pid_t wpid = llvm::sys::RetryAfterSignal(-1, ::waitpid, pid, &wstatus, 0); + assert(wpid == pid); + (void)wpid; + if (!WIFSTOPPED(wstatus)) { + LLDB_LOG(log, "Could not sync with inferior process: wstatus={1}", + WaitStatus::Decode(wstatus)); + return llvm::make_error("Could not sync with inferior process", + llvm::inconvertibleErrorCode()); + } + LLDB_LOG(log, "inferior started, now in stopped state"); + + ProcessInstanceInfo Info; + if (!Host::GetProcessInfo(pid, Info)) { + return llvm::make_error("Cannot get process architecture", + llvm::inconvertibleErrorCode()); + } + + // Set the architecture to the exe architecture. + LLDB_LOG(log, "pid = {0:x}, detected architecture {1}", pid, + Info.GetArchitecture().GetArchitectureName()); + + std::unique_ptr process_up(new NativeProcessFreeBSD( + pid, launch_info.GetPTY().ReleasePrimaryFileDescriptor(), native_delegate, + Info.GetArchitecture(), mainloop)); + + status = process_up->ReinitializeThreads(); + if (status.Fail()) + return status.ToError(); + + for (const auto &thread : process_up->m_threads) + static_cast(*thread).SetStoppedBySignal(SIGSTOP); + process_up->SetState(StateType::eStateStopped, false); + + return std::move(process_up); +} + +llvm::Expected> +NativeProcessFreeBSD::Factory::Attach( + lldb::pid_t pid, NativeProcessProtocol::NativeDelegate &native_delegate, + MainLoop &mainloop) const { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + LLDB_LOG(log, "pid = {0:x}", pid); + + // Retrieve the architecture for the running process. + ProcessInstanceInfo Info; + if (!Host::GetProcessInfo(pid, Info)) { + return llvm::make_error("Cannot get process architecture", + llvm::inconvertibleErrorCode()); + } + + std::unique_ptr process_up(new NativeProcessFreeBSD( + pid, -1, native_delegate, Info.GetArchitecture(), mainloop)); + + Status status = process_up->Attach(); + if (!status.Success()) + return status.ToError(); + + return std::move(process_up); +} + +// Public Instance Methods + +NativeProcessFreeBSD::NativeProcessFreeBSD(::pid_t pid, int terminal_fd, + NativeDelegate &delegate, + const ArchSpec &arch, + MainLoop &mainloop) + : NativeProcessELF(pid, terminal_fd, delegate), m_arch(arch) { + if (m_terminal_fd != -1) { + Status status = EnsureFDFlags(m_terminal_fd, O_NONBLOCK); + assert(status.Success()); + } + + Status status; + m_sigchld_handle = mainloop.RegisterSignal( + SIGCHLD, [this](MainLoopBase &) { SigchldHandler(); }, status); + assert(m_sigchld_handle && status.Success()); +} + +// Handles all waitpid events from the inferior process. +void NativeProcessFreeBSD::MonitorCallback(lldb::pid_t pid, int signal) { + switch (signal) { + case SIGTRAP: + return MonitorSIGTRAP(pid); + case SIGSTOP: + return MonitorSIGSTOP(pid); + default: + return MonitorSignal(pid, signal); + } +} + +void NativeProcessFreeBSD::MonitorExited(lldb::pid_t pid, WaitStatus status) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + + LLDB_LOG(log, "got exit signal({0}) , pid = {1}", status, pid); + + /* Stop Tracking All Threads attached to Process */ + m_threads.clear(); + + SetExitStatus(status, true); + + // Notify delegate that our process has exited. + SetState(StateType::eStateExited, true); +} + +void NativeProcessFreeBSD::MonitorSIGSTOP(lldb::pid_t pid) { + /* Stop all Threads attached to Process */ + for (const auto &thread : m_threads) { + static_cast(*thread).SetStoppedBySignal(SIGSTOP, + nullptr); + } + SetState(StateType::eStateStopped, true); +} + +void NativeProcessFreeBSD::MonitorSIGTRAP(lldb::pid_t pid) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + struct ptrace_lwpinfo info; + + const auto siginfo_err = PtraceWrapper(PT_LWPINFO, pid, &info, sizeof(info)); + if (siginfo_err.Fail()) { + LLDB_LOG(log, "PT_LWPINFO failed {0}", siginfo_err); + return; + } + assert(info.pl_event == PL_EVENT_SIGNAL); + // TODO: do we need to handle !PL_FLAG_SI? + assert(info.pl_flags & PL_FLAG_SI); + assert(info.pl_siginfo.si_signo == SIGTRAP); + + LLDB_LOG(log, "got SIGTRAP, pid = {0}, lwpid = {1}, si_code = {2}", pid, + info.pl_lwpid, info.pl_siginfo.si_code); + + NativeThreadFreeBSD *thread = nullptr; + if (info.pl_lwpid > 0) { + for (const auto &t : m_threads) { + if (t->GetID() == static_cast(info.pl_lwpid)) { + thread = static_cast(t.get()); + break; + } + static_cast(t.get())->SetStoppedWithNoReason(); + } + if (!thread) + LLDB_LOG(log, "thread not found in m_threads, pid = {0}, LWP = {1}", pid, + info.pl_lwpid); + } + + switch (info.pl_siginfo.si_code) { + case TRAP_BRKPT: + if (thread) { + thread->SetStoppedByBreakpoint(); + FixupBreakpointPCAsNeeded(*thread); + } + SetState(StateType::eStateStopped, true); + break; + case TRAP_TRACE: + if (thread) + thread->SetStoppedByTrace(); + SetState(StateType::eStateStopped, true); + break; + } +} + +void NativeProcessFreeBSD::MonitorSignal(lldb::pid_t pid, int signal) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + struct ptrace_lwpinfo info; + + const auto siginfo_err = PtraceWrapper(PT_LWPINFO, pid, &info, sizeof(info)); + if (siginfo_err.Fail()) { + LLDB_LOG(log, "PT_LWPINFO failed {0}", siginfo_err); + return; + } + assert(info.pl_event == PL_EVENT_SIGNAL); + // TODO: do we need to handle !PL_FLAG_SI? + assert(info.pl_flags & PL_FLAG_SI); + assert(info.pl_siginfo.si_signo == signal); + + for (const auto &abs_thread : m_threads) { + NativeThreadFreeBSD &thread = + static_cast(*abs_thread); + assert(info.pl_lwpid >= 0); + if (info.pl_lwpid == 0 || + static_cast(info.pl_lwpid) == thread.GetID()) + thread.SetStoppedBySignal(info.pl_siginfo.si_signo, &info.pl_siginfo); + else + thread.SetStoppedWithNoReason(); + } + SetState(StateType::eStateStopped, true); +} + +Status NativeProcessFreeBSD::PtraceWrapper(int req, lldb::pid_t pid, void *addr, + int data, int *result) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PTRACE)); + Status error; + int ret; + + errno = 0; + ret = + ptrace(req, static_cast<::pid_t>(pid), static_cast(addr), data); + + if (ret == -1) + error.SetErrorToErrno(); + + if (result) + *result = ret; + + LLDB_LOG(log, "ptrace({0}, {1}, {2}, {3})={4:x}", req, pid, addr, data, ret); + + if (error.Fail()) + LLDB_LOG(log, "ptrace() failed: {0}", error); + + return error; +} + +Status NativeProcessFreeBSD::Resume(const ResumeActionList &resume_actions) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + LLDB_LOG(log, "pid {0}", GetID()); + + Status ret; + + int signal = 0; + for (const auto &abs_thread : m_threads) { + assert(abs_thread && "thread list should not contain NULL threads"); + NativeThreadFreeBSD &thread = + static_cast(*abs_thread); + + const ResumeAction *action = + resume_actions.GetActionForThread(thread.GetID(), true); + // we need to explicit issue suspend requests, so it is simpler to map it + // into proper action + ResumeAction suspend_action{thread.GetID(), eStateSuspended, + LLDB_INVALID_SIGNAL_NUMBER}; + + if (action == nullptr) { + LLDB_LOG(log, "no action specified for pid {0} tid {1}", GetID(), + thread.GetID()); + action = &suspend_action; + } + + LLDB_LOG( + log, + "processing resume action state {0} signal {1} for pid {2} tid {3}", + action->state, action->signal, GetID(), thread.GetID()); + + switch (action->state) { + case eStateRunning: + ret = thread.Resume(); + break; + case eStateStepping: + ret = thread.SingleStep(); + break; + case eStateSuspended: + case eStateStopped: + if (action->signal != LLDB_INVALID_SIGNAL_NUMBER) + return Status("Passing signal to suspended thread unsupported"); + + ret = thread.Suspend(); + break; + + default: + return Status( + "NativeProcessFreeBSD::%s (): unexpected state %s specified " + "for pid %" PRIu64 ", tid %" PRIu64, + __FUNCTION__, StateAsCString(action->state), GetID(), thread.GetID()); + } + + if (!ret.Success()) + return ret; + if (action->signal != LLDB_INVALID_SIGNAL_NUMBER) + signal = action->signal; + } + + ret = + PtraceWrapper(PT_CONTINUE, GetID(), reinterpret_cast(1), signal); + if (ret.Success()) + SetState(eStateRunning, true); + return ret; +} + +Status NativeProcessFreeBSD::Halt() { + Status error; + + if (kill(GetID(), SIGSTOP) != 0) + error.SetErrorToErrno(); + return error; +} + +Status NativeProcessFreeBSD::Detach() { + Status error; + + // Stop monitoring the inferior. + m_sigchld_handle.reset(); + + // Tell ptrace to detach from the process. + if (GetID() == LLDB_INVALID_PROCESS_ID) + return error; + + return PtraceWrapper(PT_DETACH, GetID()); +} + +Status NativeProcessFreeBSD::Signal(int signo) { + Status error; + + if (kill(GetID(), signo)) + error.SetErrorToErrno(); + + return error; +} + +Status NativeProcessFreeBSD::Interrupt() { return Halt(); } + +Status NativeProcessFreeBSD::Kill() { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + LLDB_LOG(log, "pid {0}", GetID()); + + Status error; + + switch (m_state) { + case StateType::eStateInvalid: + case StateType::eStateExited: + case StateType::eStateCrashed: + case StateType::eStateDetached: + case StateType::eStateUnloaded: + // Nothing to do - the process is already dead. + LLDB_LOG(log, "ignored for PID {0} due to current state: {1}", GetID(), + StateAsCString(m_state)); + return error; + + case StateType::eStateConnected: + case StateType::eStateAttaching: + case StateType::eStateLaunching: + case StateType::eStateStopped: + case StateType::eStateRunning: + case StateType::eStateStepping: + case StateType::eStateSuspended: + // We can try to kill a process in these states. + break; + } + + if (kill(GetID(), SIGKILL) != 0) { + error.SetErrorToErrno(); + return error; + } + + return error; +} + +Status NativeProcessFreeBSD::GetMemoryRegionInfo(lldb::addr_t load_addr, + MemoryRegionInfo &range_info) { + + if (m_supports_mem_region == LazyBool::eLazyBoolNo) { + // We're done. + return Status("unsupported"); + } + + Status error = PopulateMemoryRegionCache(); + if (error.Fail()) { + return error; + } + + lldb::addr_t prev_base_address = 0; + // FIXME start by finding the last region that is <= target address using + // binary search. Data is sorted. + // There can be a ton of regions on pthreads apps with lots of threads. + for (auto it = m_mem_region_cache.begin(); it != m_mem_region_cache.end(); + ++it) { + MemoryRegionInfo &proc_entry_info = it->first; + // Sanity check assumption that memory map entries are ascending. + assert((proc_entry_info.GetRange().GetRangeBase() >= prev_base_address) && + "descending memory map entries detected, unexpected"); + prev_base_address = proc_entry_info.GetRange().GetRangeBase(); + UNUSED_IF_ASSERT_DISABLED(prev_base_address); + // If the target address comes before this entry, indicate distance to next + // region. + if (load_addr < proc_entry_info.GetRange().GetRangeBase()) { + range_info.GetRange().SetRangeBase(load_addr); + range_info.GetRange().SetByteSize( + proc_entry_info.GetRange().GetRangeBase() - load_addr); + range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo); + range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo); + range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo); + range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo); + return error; + } else if (proc_entry_info.GetRange().Contains(load_addr)) { + // The target address is within the memory region we're processing here. + range_info = proc_entry_info; + return error; + } + // The target memory address comes somewhere after the region we just + // parsed. + } + // If we made it here, we didn't find an entry that contained the given + // address. Return the load_addr as start and the amount of bytes betwwen + // load address and the end of the memory as size. + range_info.GetRange().SetRangeBase(load_addr); + range_info.GetRange().SetRangeEnd(LLDB_INVALID_ADDRESS); + range_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo); + range_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo); + range_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo); + range_info.SetMapped(MemoryRegionInfo::OptionalBool::eNo); + return error; +} + +Status NativeProcessFreeBSD::PopulateMemoryRegionCache() { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + // If our cache is empty, pull the latest. There should always be at least + // one memory region if memory region handling is supported. + if (!m_mem_region_cache.empty()) { + LLDB_LOG(log, "reusing {0} cached memory region entries", + m_mem_region_cache.size()); + return Status(); + } + + int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, static_cast(m_pid)}; + int ret; + size_t len; + + ret = ::sysctl(mib, 4, nullptr, &len, nullptr, 0); + if (ret != 0) { + m_supports_mem_region = LazyBool::eLazyBoolNo; + return Status("sysctl() for KERN_PROC_VMMAP failed"); + } + + std::unique_ptr buf = + llvm::WritableMemoryBuffer::getNewMemBuffer(len); + ret = ::sysctl(mib, 4, buf->getBufferStart(), &len, nullptr, 0); + if (ret != 0) { + m_supports_mem_region = LazyBool::eLazyBoolNo; + return Status("sysctl() for KERN_PROC_VMMAP failed"); + } + + char *bp = buf->getBufferStart();; + char *end = bp + len; + while (bp < end) { + auto *kv = reinterpret_cast(bp); + if (kv->kve_structsize == 0) + break; + bp += kv->kve_structsize; + + MemoryRegionInfo info; + info.Clear(); + info.GetRange().SetRangeBase(kv->kve_start); + info.GetRange().SetRangeEnd(kv->kve_end); + info.SetMapped(MemoryRegionInfo::OptionalBool::eYes); + + if (kv->kve_protection & VM_PROT_READ) + info.SetReadable(MemoryRegionInfo::OptionalBool::eYes); + else + info.SetReadable(MemoryRegionInfo::OptionalBool::eNo); + + if (kv->kve_protection & VM_PROT_WRITE) + info.SetWritable(MemoryRegionInfo::OptionalBool::eYes); + else + info.SetWritable(MemoryRegionInfo::OptionalBool::eNo); + + if (kv->kve_protection & VM_PROT_EXECUTE) + info.SetExecutable(MemoryRegionInfo::OptionalBool::eYes); + else + info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo); + + if (kv->kve_path[0]) + info.SetName(kv->kve_path); + + m_mem_region_cache.emplace_back(info, + FileSpec(info.GetName().GetCString())); + } + + if (m_mem_region_cache.empty()) { + // No entries after attempting to read them. This shouldn't happen. Assume + // we don't support map entries. + LLDB_LOG(log, "failed to find any vmmap entries, assuming no support " + "for memory region metadata retrieval"); + m_supports_mem_region = LazyBool::eLazyBoolNo; + return Status("not supported"); + } + LLDB_LOG(log, "read {0} memory region entries from process {1}", + m_mem_region_cache.size(), GetID()); + // We support memory retrieval, remember that. + m_supports_mem_region = LazyBool::eLazyBoolYes; + + return Status(); +} + +Status NativeProcessFreeBSD::AllocateMemory(size_t size, uint32_t permissions, + lldb::addr_t &addr) { + return Status("Unimplemented"); +} + +Status NativeProcessFreeBSD::DeallocateMemory(lldb::addr_t addr) { + return Status("Unimplemented"); +} + +lldb::addr_t NativeProcessFreeBSD::GetSharedLibraryInfoAddress() { + // punt on this for now + return LLDB_INVALID_ADDRESS; +} + +size_t NativeProcessFreeBSD::UpdateThreads() { return m_threads.size(); } + +Status NativeProcessFreeBSD::SetBreakpoint(lldb::addr_t addr, uint32_t size, + bool hardware) { + if (hardware) + return Status("NativeProcessFreeBSD does not support hardware breakpoints"); + else + return SetSoftwareBreakpoint(addr, size); +} + +Status NativeProcessFreeBSD::GetLoadedModuleFileSpec(const char *module_path, + FileSpec &file_spec) { + return Status("Unimplemented"); +} + +Status +NativeProcessFreeBSD::GetFileLoadAddress(const llvm::StringRef &file_name, + lldb::addr_t &load_addr) { + load_addr = LLDB_INVALID_ADDRESS; + return Status(); +} + +void NativeProcessFreeBSD::SigchldHandler() { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_PROCESS)); + // Process all pending waitpid notifications. + int status; + ::pid_t wait_pid = + llvm::sys::RetryAfterSignal(-1, waitpid, GetID(), &status, WNOHANG); + + if (wait_pid == 0) + return; // We are done. + + if (wait_pid == -1) { + Status error(errno, eErrorTypePOSIX); + LLDB_LOG(log, "waitpid ({0}, &status, _) failed: {1}", GetID(), error); + } + + WaitStatus wait_status = WaitStatus::Decode(status); + bool exited = wait_status.type == WaitStatus::Exit || + (wait_status.type == WaitStatus::Signal && + wait_pid == static_cast<::pid_t>(GetID())); + + LLDB_LOG(log, + "waitpid ({0}, &status, _) => pid = {1}, status = {2}, exited = {3}", + GetID(), wait_pid, status, exited); + + if (exited) + MonitorExited(wait_pid, wait_status); + else { + assert(wait_status.type == WaitStatus::Stop); + MonitorCallback(wait_pid, wait_status.status); + } +} + +bool NativeProcessFreeBSD::HasThreadNoLock(lldb::tid_t thread_id) { + for (const auto &thread : m_threads) { + assert(thread && "thread list should not contain NULL threads"); + if (thread->GetID() == thread_id) { + // We have this thread. + return true; + } + } + + // We don't have this thread. + return false; +} + +NativeThreadFreeBSD &NativeProcessFreeBSD::AddThread(lldb::tid_t thread_id) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD)); + LLDB_LOG(log, "pid {0} adding thread with tid {1}", GetID(), thread_id); + + assert(thread_id > 0); + assert(!HasThreadNoLock(thread_id) && + "attempted to add a thread by id that already exists"); + + // If this is the first thread, save it as the current thread + if (m_threads.empty()) + SetCurrentThreadID(thread_id); + + m_threads.push_back(std::make_unique(*this, thread_id)); + return static_cast(*m_threads.back()); +} + +void NativeProcessFreeBSD::RemoveThread(lldb::tid_t thread_id) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD)); + LLDB_LOG(log, "pid {0} removing thread with tid {1}", GetID(), thread_id); + + assert(thread_id > 0); + assert(HasThreadNoLock(thread_id) && + "attempted to remove a thread that does not exist"); + + for (auto it = m_threads.begin(); it != m_threads.end(); ++it) { + if ((*it)->GetID() == thread_id) { + m_threads.erase(it); + break; + } + } +} + +Status NativeProcessFreeBSD::Attach() { + // Attach to the requested process. + // An attach will cause the thread to stop with a SIGSTOP. + Status status = PtraceWrapper(PT_ATTACH, m_pid); + if (status.Fail()) + return status; + + int wstatus; + // Need to use WALLSIG otherwise we receive an error with errno=ECHLD At this + // point we should have a thread stopped if waitpid succeeds. + if ((wstatus = llvm::sys::RetryAfterSignal(-1, waitpid, m_pid, nullptr, 0)) < + 0) + return Status(errno, eErrorTypePOSIX); + + /* Initialize threads */ + status = ReinitializeThreads(); + if (status.Fail()) + return status; + + for (const auto &thread : m_threads) + static_cast(*thread).SetStoppedBySignal(SIGSTOP); + + // Let our process instance know the thread has stopped. + SetState(StateType::eStateStopped); + return Status(); +} + +Status NativeProcessFreeBSD::ReadMemory(lldb::addr_t addr, void *buf, + size_t size, size_t &bytes_read) { + unsigned char *dst = static_cast(buf); + struct ptrace_io_desc io; + + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY)); + LLDB_LOG(log, "addr = {0}, buf = {1}, size = {2}", addr, buf, size); + + bytes_read = 0; + io.piod_op = PIOD_READ_D; + io.piod_len = size; + + do { + io.piod_offs = (void *)(addr + bytes_read); + io.piod_addr = dst + bytes_read; + + Status error = NativeProcessFreeBSD::PtraceWrapper(PT_IO, GetID(), &io); + if (error.Fail() || io.piod_len == 0) + return error; + + bytes_read += io.piod_len; + io.piod_len = size - bytes_read; + } while (bytes_read < size); + + return Status(); +} + +Status NativeProcessFreeBSD::WriteMemory(lldb::addr_t addr, const void *buf, + size_t size, size_t &bytes_written) { + const unsigned char *src = static_cast(buf); + Status error; + struct ptrace_io_desc io; + + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_MEMORY)); + LLDB_LOG(log, "addr = {0}, buf = {1}, size = {2}", addr, buf, size); + + bytes_written = 0; + io.piod_op = PIOD_WRITE_D; + io.piod_len = size; + + do { + io.piod_addr = + const_cast(static_cast(src + bytes_written)); + io.piod_offs = (void *)(addr + bytes_written); + + Status error = NativeProcessFreeBSD::PtraceWrapper(PT_IO, GetID(), &io); + if (error.Fail() || io.piod_len == 0) + return error; + + bytes_written += io.piod_len; + io.piod_len = size - bytes_written; + } while (bytes_written < size); + + return error; +} + +llvm::ErrorOr> +NativeProcessFreeBSD::GetAuxvData() const { + int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_AUXV, static_cast(GetID())}; + size_t auxv_size = AT_COUNT * sizeof(Elf_Auxinfo); + std::unique_ptr buf = + llvm::WritableMemoryBuffer::getNewMemBuffer(auxv_size); + + if (::sysctl(mib, 4, buf->getBufferStart(), &auxv_size, nullptr, 0) != 0) + return std::error_code(errno, std::generic_category()); + + return buf; +} + +Status NativeProcessFreeBSD::ReinitializeThreads() { + // Clear old threads + m_threads.clear(); + + int num_lwps; + Status error = PtraceWrapper(PT_GETNUMLWPS, GetID(), nullptr, 0, &num_lwps); + if (error.Fail()) + return error; + + std::vector lwp_ids; + lwp_ids.resize(num_lwps); + error = PtraceWrapper(PT_GETLWPLIST, GetID(), lwp_ids.data(), + lwp_ids.size() * sizeof(lwpid_t), &num_lwps); + if (error.Fail()) + return error; + + // Reinitialize from scratch threads and register them in process + for (lwpid_t lwp : lwp_ids) + AddThread(lwp); + + return error; +} Index: lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD.h =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD.h @@ -0,0 +1,48 @@ +//===-- NativeRegisterContextFreeBSD.h --------------------------*- 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 +// +//===----------------------------------------------------------------------===// + +#ifndef lldb_NativeRegisterContextFreeBSD_h +#define lldb_NativeRegisterContextFreeBSD_h + +#include "lldb/Host/common/NativeThreadProtocol.h" + +#include "Plugins/Process/Utility/NativeRegisterContextRegisterInfo.h" + +namespace lldb_private { +namespace process_freebsd { + +class NativeProcessFreeBSD; + +class NativeRegisterContextFreeBSD : public NativeRegisterContextRegisterInfo { +public: + NativeRegisterContextFreeBSD(NativeThreadProtocol &native_thread, + RegisterInfoInterface *reg_info_interface_p); + + // This function is implemented in the NativeRegisterContextFreeBSD_* + // subclasses to create a new instance of the host specific + // NativeRegisterContextFreeBSD. The implementations can't collide as only one + // NativeRegisterContextFreeBSD_* variant should be compiled into the final + // executable. + static NativeRegisterContextFreeBSD * + CreateHostNativeRegisterContextFreeBSD(const ArchSpec &target_arch, + NativeThreadProtocol &native_thread); + virtual Status + CopyHardwareWatchpointsFrom(NativeRegisterContextFreeBSD &source) = 0; + + virtual Status ClearWatchpointHit(uint32_t wp_index) = 0; + +protected: + Status DoRegisterSet(int req, void *buf); + virtual NativeProcessFreeBSD &GetProcess(); + virtual ::pid_t GetProcessPid(); +}; + +} // namespace process_freebsd +} // namespace lldb_private + +#endif // #ifndef lldb_NativeRegisterContextFreeBSD_h Index: lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD.cpp =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD.cpp @@ -0,0 +1,39 @@ +//===-- NativeRegisterContextFreeBSD.cpp ----------------------------------===// +// +// 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 "NativeRegisterContextFreeBSD.h" + +#include "Plugins/Process/FreeBSDRemote/NativeProcessFreeBSD.h" + +#include "lldb/Host/common/NativeProcessProtocol.h" + +using namespace lldb_private; +using namespace lldb_private::process_freebsd; + +// clang-format off +#include +#include +// clang-format on + +NativeRegisterContextFreeBSD::NativeRegisterContextFreeBSD( + NativeThreadProtocol &native_thread, + RegisterInfoInterface *reg_info_interface_p) + : NativeRegisterContextRegisterInfo(native_thread, reg_info_interface_p) {} + +Status NativeRegisterContextFreeBSD::DoRegisterSet(int ptrace_req, void *buf) { + return NativeProcessFreeBSD::PtraceWrapper(ptrace_req, GetProcessPid(), buf, + m_thread.GetID()); +} + +NativeProcessFreeBSD &NativeRegisterContextFreeBSD::GetProcess() { + return static_cast(m_thread.GetProcess()); +} + +::pid_t NativeRegisterContextFreeBSD::GetProcessPid() { + return GetProcess().GetID(); +} Index: lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD_x86_64.h =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD_x86_64.h @@ -0,0 +1,101 @@ +//===-- NativeRegisterContextFreeBSD_x86_64.h -------------------*- 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 +// +//===----------------------------------------------------------------------===// + +#if defined(__i386__) || defined(__x86_64__) + +#ifndef lldb_NativeRegisterContextFreeBSD_x86_64_h +#define lldb_NativeRegisterContextFreeBSD_x86_64_h + +// clang-format off +#include +#include +#include +#include +// clang-format on + +#include "Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD.h" +#include "Plugins/Process/Utility/RegisterContext_x86.h" +#include "Plugins/Process/Utility/lldb-x86-register-enums.h" + +namespace lldb_private { +namespace process_freebsd { + +class NativeProcessFreeBSD; + +class NativeRegisterContextFreeBSD_x86_64 + : public NativeRegisterContextFreeBSD { +public: + NativeRegisterContextFreeBSD_x86_64(const ArchSpec &target_arch, + NativeThreadProtocol &native_thread); + uint32_t GetRegisterSetCount() const override; + + const RegisterSet *GetRegisterSet(uint32_t set_index) const override; + + Status ReadRegister(const RegisterInfo *reg_info, + RegisterValue ®_value) override; + + Status WriteRegister(const RegisterInfo *reg_info, + const RegisterValue ®_value) override; + + Status ReadAllRegisterValues(lldb::DataBufferSP &data_sp) override; + + Status WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override; + + Status IsWatchpointHit(uint32_t wp_index, bool &is_hit) override; + + Status GetWatchpointHitIndex(uint32_t &wp_index, + lldb::addr_t trap_addr) override; + + Status IsWatchpointVacant(uint32_t wp_index, bool &is_vacant) override; + + bool ClearHardwareWatchpoint(uint32_t wp_index) override; + + Status ClearWatchpointHit(uint32_t wp_index) override; + + Status ClearAllHardwareWatchpoints() override; + + Status SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size, + uint32_t watch_flags, + uint32_t wp_index); + + uint32_t SetHardwareWatchpoint(lldb::addr_t addr, size_t size, + uint32_t watch_flags) override; + + lldb::addr_t GetWatchpointAddress(uint32_t wp_index) override; + + uint32_t NumSupportedHardwareWatchpoints() override; + + Status + CopyHardwareWatchpointsFrom(NativeRegisterContextFreeBSD &source) override; + +private: + // Private member types. + enum { GPRegSet, FPRegSet, DBRegSet }; + + // Private member variables. + struct reg m_gpr; +#if defined(__x86_64__) + struct fpreg m_fpr; +#else + struct xmmreg m_fpr; +#endif + struct dbreg m_dbr; + + int GetSetForNativeRegNum(int reg_num) const; + int GetDR(int num) const; + + Status ReadRegisterSet(uint32_t set); + Status WriteRegisterSet(uint32_t set); +}; + +} // namespace process_freebsd +} // namespace lldb_private + +#endif // #ifndef lldb_NativeRegisterContextFreeBSD_x86_64_h + +#endif // defined(__x86_64__) Index: lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD_x86_64.cpp =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD_x86_64.cpp @@ -0,0 +1,1315 @@ +//===-- NativeRegisterContextFreeBSD_x86_64.cpp ---------------------------===// +// +// 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 +// +//===----------------------------------------------------------------------===// + +#if defined(__i386__) || defined(__x86_64__) + +#include "NativeRegisterContextFreeBSD_x86_64.h" + +#include + +#include "lldb/Host/HostInfo.h" +#include "lldb/Utility/DataBufferHeap.h" +#include "lldb/Utility/Log.h" +#include "lldb/Utility/RegisterValue.h" +#include "lldb/Utility/Status.h" + +#include "Plugins/Process/Utility/RegisterContextFreeBSD_i386.h" +#include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h" + +using namespace lldb_private; +using namespace lldb_private::process_freebsd; + +// Private namespace. + +namespace { +// x86 64-bit general purpose registers. +static const uint32_t g_gpr_regnums_x86_64[] = { + lldb_rax_x86_64, lldb_rbx_x86_64, lldb_rcx_x86_64, lldb_rdx_x86_64, + lldb_rdi_x86_64, lldb_rsi_x86_64, lldb_rbp_x86_64, lldb_rsp_x86_64, + lldb_r8_x86_64, lldb_r9_x86_64, lldb_r10_x86_64, lldb_r11_x86_64, + lldb_r12_x86_64, lldb_r13_x86_64, lldb_r14_x86_64, lldb_r15_x86_64, + lldb_rip_x86_64, lldb_rflags_x86_64, lldb_cs_x86_64, lldb_fs_x86_64, + lldb_gs_x86_64, lldb_ss_x86_64, lldb_ds_x86_64, lldb_es_x86_64, + lldb_eax_x86_64, lldb_ebx_x86_64, lldb_ecx_x86_64, lldb_edx_x86_64, + lldb_edi_x86_64, lldb_esi_x86_64, lldb_ebp_x86_64, lldb_esp_x86_64, + lldb_r8d_x86_64, // Low 32 bits or r8 + lldb_r9d_x86_64, // Low 32 bits or r9 + lldb_r10d_x86_64, // Low 32 bits or r10 + lldb_r11d_x86_64, // Low 32 bits or r11 + lldb_r12d_x86_64, // Low 32 bits or r12 + lldb_r13d_x86_64, // Low 32 bits or r13 + lldb_r14d_x86_64, // Low 32 bits or r14 + lldb_r15d_x86_64, // Low 32 bits or r15 + lldb_ax_x86_64, lldb_bx_x86_64, lldb_cx_x86_64, lldb_dx_x86_64, + lldb_di_x86_64, lldb_si_x86_64, lldb_bp_x86_64, lldb_sp_x86_64, + lldb_r8w_x86_64, // Low 16 bits or r8 + lldb_r9w_x86_64, // Low 16 bits or r9 + lldb_r10w_x86_64, // Low 16 bits or r10 + lldb_r11w_x86_64, // Low 16 bits or r11 + lldb_r12w_x86_64, // Low 16 bits or r12 + lldb_r13w_x86_64, // Low 16 bits or r13 + lldb_r14w_x86_64, // Low 16 bits or r14 + lldb_r15w_x86_64, // Low 16 bits or r15 + lldb_ah_x86_64, lldb_bh_x86_64, lldb_ch_x86_64, lldb_dh_x86_64, + lldb_al_x86_64, lldb_bl_x86_64, lldb_cl_x86_64, lldb_dl_x86_64, + lldb_dil_x86_64, lldb_sil_x86_64, lldb_bpl_x86_64, lldb_spl_x86_64, + lldb_r8l_x86_64, // Low 8 bits or r8 + lldb_r9l_x86_64, // Low 8 bits or r9 + lldb_r10l_x86_64, // Low 8 bits or r10 + lldb_r11l_x86_64, // Low 8 bits or r11 + lldb_r12l_x86_64, // Low 8 bits or r12 + lldb_r13l_x86_64, // Low 8 bits or r13 + lldb_r14l_x86_64, // Low 8 bits or r14 + lldb_r15l_x86_64, // Low 8 bits or r15 + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_gpr_regnums_x86_64) / sizeof(g_gpr_regnums_x86_64[0])) - + 1 == + k_num_gpr_registers_x86_64, + "g_gpr_regnums_x86_64 has wrong number of register infos"); + +// x86 64-bit floating point registers. +static const uint32_t g_fpu_regnums_x86_64[] = { + lldb_fctrl_x86_64, lldb_fstat_x86_64, lldb_ftag_x86_64, + lldb_fop_x86_64, lldb_fiseg_x86_64, lldb_fioff_x86_64, + lldb_foseg_x86_64, lldb_fooff_x86_64, lldb_mxcsr_x86_64, + lldb_mxcsrmask_x86_64, lldb_st0_x86_64, lldb_st1_x86_64, + lldb_st2_x86_64, lldb_st3_x86_64, lldb_st4_x86_64, + lldb_st5_x86_64, lldb_st6_x86_64, lldb_st7_x86_64, + lldb_mm0_x86_64, lldb_mm1_x86_64, lldb_mm2_x86_64, + lldb_mm3_x86_64, lldb_mm4_x86_64, lldb_mm5_x86_64, + lldb_mm6_x86_64, lldb_mm7_x86_64, lldb_xmm0_x86_64, + lldb_xmm1_x86_64, lldb_xmm2_x86_64, lldb_xmm3_x86_64, + lldb_xmm4_x86_64, lldb_xmm5_x86_64, lldb_xmm6_x86_64, + lldb_xmm7_x86_64, lldb_xmm8_x86_64, lldb_xmm9_x86_64, + lldb_xmm10_x86_64, lldb_xmm11_x86_64, lldb_xmm12_x86_64, + lldb_xmm13_x86_64, lldb_xmm14_x86_64, lldb_xmm15_x86_64, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_fpu_regnums_x86_64) / sizeof(g_fpu_regnums_x86_64[0])) - + 1 == + k_num_fpr_registers_x86_64, + "g_fpu_regnums_x86_64 has wrong number of register infos"); + +// x86 64-bit registers available via XState. +static const uint32_t g_xstate_regnums_x86_64[] = { + lldb_ymm0_x86_64, lldb_ymm1_x86_64, lldb_ymm2_x86_64, lldb_ymm3_x86_64, + lldb_ymm4_x86_64, lldb_ymm5_x86_64, lldb_ymm6_x86_64, lldb_ymm7_x86_64, + lldb_ymm8_x86_64, lldb_ymm9_x86_64, lldb_ymm10_x86_64, lldb_ymm11_x86_64, + lldb_ymm12_x86_64, lldb_ymm13_x86_64, lldb_ymm14_x86_64, lldb_ymm15_x86_64, + // Note: we currently do not provide them but this is needed to avoid + // unnamed groups in SBFrame::GetRegisterContext(). + lldb_bnd0_x86_64, lldb_bnd1_x86_64, lldb_bnd2_x86_64, lldb_bnd3_x86_64, + lldb_bndcfgu_x86_64, lldb_bndstatus_x86_64, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_xstate_regnums_x86_64) / + sizeof(g_xstate_regnums_x86_64[0])) - + 1 == + k_num_avx_registers_x86_64 + k_num_mpx_registers_x86_64, + "g_xstate_regnums_x86_64 has wrong number of register infos"); + +// x86 debug registers. +static const uint32_t g_dbr_regnums_x86_64[] = { + lldb_dr0_x86_64, lldb_dr1_x86_64, lldb_dr2_x86_64, lldb_dr3_x86_64, + lldb_dr4_x86_64, lldb_dr5_x86_64, lldb_dr6_x86_64, lldb_dr7_x86_64, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_dbr_regnums_x86_64) / sizeof(g_dbr_regnums_x86_64[0])) - + 1 == + k_num_dbr_registers_x86_64, + "g_dbr_regnums_x86_64 has wrong number of register infos"); + +// x86 32-bit general purpose registers. +const uint32_t g_gpr_regnums_i386[] = { + lldb_eax_i386, lldb_ebx_i386, lldb_ecx_i386, lldb_edx_i386, + lldb_edi_i386, lldb_esi_i386, lldb_ebp_i386, lldb_esp_i386, + lldb_eip_i386, lldb_eflags_i386, lldb_cs_i386, lldb_fs_i386, + lldb_gs_i386, lldb_ss_i386, lldb_ds_i386, lldb_es_i386, + lldb_ax_i386, lldb_bx_i386, lldb_cx_i386, lldb_dx_i386, + lldb_di_i386, lldb_si_i386, lldb_bp_i386, lldb_sp_i386, + lldb_ah_i386, lldb_bh_i386, lldb_ch_i386, lldb_dh_i386, + lldb_al_i386, lldb_bl_i386, lldb_cl_i386, lldb_dl_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_gpr_regnums_i386) / sizeof(g_gpr_regnums_i386[0])) - + 1 == + k_num_gpr_registers_i386, + "g_gpr_regnums_i386 has wrong number of register infos"); + +// x86 32-bit floating point registers. +const uint32_t g_fpu_regnums_i386[] = { + lldb_fctrl_i386, lldb_fstat_i386, lldb_ftag_i386, lldb_fop_i386, + lldb_fiseg_i386, lldb_fioff_i386, lldb_foseg_i386, lldb_fooff_i386, + lldb_mxcsr_i386, lldb_mxcsrmask_i386, lldb_st0_i386, lldb_st1_i386, + lldb_st2_i386, lldb_st3_i386, lldb_st4_i386, lldb_st5_i386, + lldb_st6_i386, lldb_st7_i386, lldb_mm0_i386, lldb_mm1_i386, + lldb_mm2_i386, lldb_mm3_i386, lldb_mm4_i386, lldb_mm5_i386, + lldb_mm6_i386, lldb_mm7_i386, lldb_xmm0_i386, lldb_xmm1_i386, + lldb_xmm2_i386, lldb_xmm3_i386, lldb_xmm4_i386, lldb_xmm5_i386, + lldb_xmm6_i386, lldb_xmm7_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_fpu_regnums_i386) / sizeof(g_fpu_regnums_i386[0])) - + 1 == + k_num_fpr_registers_i386, + "g_fpu_regnums_i386 has wrong number of register infos"); + +// x86 64-bit registers available via XState. +static const uint32_t g_xstate_regnums_i386[] = { + lldb_ymm0_i386, lldb_ymm1_i386, lldb_ymm2_i386, lldb_ymm3_i386, + lldb_ymm4_i386, lldb_ymm5_i386, lldb_ymm6_i386, lldb_ymm7_i386, + // Note: we currently do not provide them but this is needed to avoid + // unnamed groups in SBFrame::GetRegisterContext(). + lldb_bnd0_i386, lldb_bnd1_i386, lldb_bnd2_i386, lldb_bnd3_i386, + lldb_bndcfgu_i386, lldb_bndstatus_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert( + (sizeof(g_xstate_regnums_i386) / sizeof(g_xstate_regnums_i386[0])) - 1 == + k_num_avx_registers_i386 + k_num_mpx_registers_i386, + "g_xstate_regnums_i386 has wrong number of register infos"); + +// x86 debug registers. +static const uint32_t g_dbr_regnums_i386[] = { + lldb_dr0_i386, lldb_dr1_i386, lldb_dr2_i386, lldb_dr3_i386, + lldb_dr4_i386, lldb_dr5_i386, lldb_dr6_i386, lldb_dr7_i386, + LLDB_INVALID_REGNUM // register sets need to end with this flag +}; +static_assert((sizeof(g_dbr_regnums_i386) / sizeof(g_dbr_regnums_i386[0])) - + 1 == + k_num_dbr_registers_i386, + "g_dbr_regnums_i386 has wrong number of register infos"); + +// Number of register sets provided by this context. +enum { k_num_register_sets = 4 }; + +// Register sets for x86 32-bit. +static const RegisterSet g_reg_sets_i386[k_num_register_sets] = { + {"General Purpose Registers", "gpr", k_num_gpr_registers_i386, + g_gpr_regnums_i386}, + {"Floating Point Registers", "fpu", k_num_fpr_registers_i386, + g_fpu_regnums_i386}, + {"Extended State Registers", "xstate", + k_num_avx_registers_i386 + k_num_mpx_registers_i386, + g_xstate_regnums_i386}, + {"Debug Registers", "dbr", k_num_dbr_registers_i386, g_dbr_regnums_i386}, +}; + +// Register sets for x86 64-bit. +static const RegisterSet g_reg_sets_x86_64[k_num_register_sets] = { + {"General Purpose Registers", "gpr", k_num_gpr_registers_x86_64, + g_gpr_regnums_x86_64}, + {"Floating Point Registers", "fpu", k_num_fpr_registers_x86_64, + g_fpu_regnums_x86_64}, + {"Extended State Registers", "xstate", + k_num_avx_registers_x86_64 + k_num_mpx_registers_x86_64, + g_xstate_regnums_x86_64}, + {"Debug Registers", "dbr", k_num_dbr_registers_x86_64, + g_dbr_regnums_x86_64}, +}; + +#define REG_CONTEXT_SIZE (GetRegisterInfoInterface().GetGPRSize()) +} // namespace + +NativeRegisterContextFreeBSD * +NativeRegisterContextFreeBSD::CreateHostNativeRegisterContextFreeBSD( + const ArchSpec &target_arch, NativeThreadProtocol &native_thread) { + return new NativeRegisterContextFreeBSD_x86_64(target_arch, native_thread); +} + +// NativeRegisterContextFreeBSD_x86_64 members. + +static RegisterInfoInterface * +CreateRegisterInfoInterface(const ArchSpec &target_arch) { + if (HostInfo::GetArchitecture().GetAddressByteSize() == 4) { + // 32-bit hosts run with a RegisterContextFreeBSD_i386 context. + return new RegisterContextFreeBSD_i386(target_arch); + } else { + assert((HostInfo::GetArchitecture().GetAddressByteSize() == 8) && + "Register setting path assumes this is a 64-bit host"); + // X86_64 hosts know how to work with 64-bit and 32-bit EXEs using the + // x86_64 register context. + return new RegisterContextFreeBSD_x86_64(target_arch); + } +} + +NativeRegisterContextFreeBSD_x86_64::NativeRegisterContextFreeBSD_x86_64( + const ArchSpec &target_arch, NativeThreadProtocol &native_thread) + : NativeRegisterContextFreeBSD(native_thread, + CreateRegisterInfoInterface(target_arch)), + m_gpr(), m_fpr(), m_dbr() {} + +// CONSIDER after local and llgs debugging are merged, register set support can +// be moved into a base x86-64 class with IsRegisterSetAvailable made virtual. +uint32_t NativeRegisterContextFreeBSD_x86_64::GetRegisterSetCount() const { + uint32_t sets = 0; + for (uint32_t set_index = 0; set_index < k_num_register_sets; ++set_index) { + if (GetSetForNativeRegNum(set_index) != -1) + ++sets; + } + + return sets; +} + +const RegisterSet * +NativeRegisterContextFreeBSD_x86_64::GetRegisterSet(uint32_t set_index) const { + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86: + return &g_reg_sets_i386[set_index]; + case llvm::Triple::x86_64: + return &g_reg_sets_x86_64[set_index]; + default: + llvm_unreachable("Unhandled target architecture."); + } +} + +static constexpr int RegNumX86ToX86_64(int regnum) { + switch (regnum) { + case lldb_eax_i386: + return lldb_rax_x86_64; + case lldb_ebx_i386: + return lldb_rbx_x86_64; + case lldb_ecx_i386: + return lldb_rcx_x86_64; + case lldb_edx_i386: + return lldb_rdx_x86_64; + case lldb_edi_i386: + return lldb_rdi_x86_64; + case lldb_esi_i386: + return lldb_rsi_x86_64; + case lldb_ebp_i386: + return lldb_rbp_x86_64; + case lldb_esp_i386: + return lldb_rsp_x86_64; + case lldb_eip_i386: + return lldb_rip_x86_64; + case lldb_eflags_i386: + return lldb_rflags_x86_64; + case lldb_cs_i386: + return lldb_cs_x86_64; + case lldb_fs_i386: + return lldb_fs_x86_64; + case lldb_gs_i386: + return lldb_gs_x86_64; + case lldb_ss_i386: + return lldb_ss_x86_64; + case lldb_ds_i386: + return lldb_ds_x86_64; + case lldb_es_i386: + return lldb_es_x86_64; + case lldb_fctrl_i386: + return lldb_fctrl_x86_64; + case lldb_fstat_i386: + return lldb_fstat_x86_64; + case lldb_ftag_i386: + return lldb_ftag_x86_64; + case lldb_fop_i386: + return lldb_fop_x86_64; + case lldb_fiseg_i386: + return lldb_fiseg_x86_64; + case lldb_fioff_i386: + return lldb_fioff_x86_64; + case lldb_foseg_i386: + return lldb_foseg_x86_64; + case lldb_fooff_i386: + return lldb_fooff_x86_64; + case lldb_mxcsr_i386: + return lldb_mxcsr_x86_64; + case lldb_mxcsrmask_i386: + return lldb_mxcsrmask_x86_64; + case lldb_st0_i386: + case lldb_st1_i386: + case lldb_st2_i386: + case lldb_st3_i386: + case lldb_st4_i386: + case lldb_st5_i386: + case lldb_st6_i386: + case lldb_st7_i386: + return lldb_st0_x86_64 + regnum - lldb_st0_i386; + case lldb_mm0_i386: + case lldb_mm1_i386: + case lldb_mm2_i386: + case lldb_mm3_i386: + case lldb_mm4_i386: + case lldb_mm5_i386: + case lldb_mm6_i386: + case lldb_mm7_i386: + return lldb_mm0_x86_64 + regnum - lldb_mm0_i386; + case lldb_xmm0_i386: + case lldb_xmm1_i386: + case lldb_xmm2_i386: + case lldb_xmm3_i386: + case lldb_xmm4_i386: + case lldb_xmm5_i386: + case lldb_xmm6_i386: + case lldb_xmm7_i386: + return lldb_xmm0_x86_64 + regnum - lldb_xmm0_i386; + case lldb_ymm0_i386: + case lldb_ymm1_i386: + case lldb_ymm2_i386: + case lldb_ymm3_i386: + case lldb_ymm4_i386: + case lldb_ymm5_i386: + case lldb_ymm6_i386: + case lldb_ymm7_i386: + return lldb_ymm0_x86_64 + regnum - lldb_ymm0_i386; + case lldb_bnd0_i386: + case lldb_bnd1_i386: + case lldb_bnd2_i386: + case lldb_bnd3_i386: + return lldb_bnd0_x86_64 + regnum - lldb_bnd0_i386; + case lldb_bndcfgu_i386: + return lldb_bndcfgu_x86_64; + case lldb_bndstatus_i386: + return lldb_bndstatus_x86_64; + case lldb_dr0_i386: + case lldb_dr1_i386: + case lldb_dr2_i386: + case lldb_dr3_i386: + case lldb_dr4_i386: + case lldb_dr5_i386: + case lldb_dr6_i386: + case lldb_dr7_i386: + return lldb_dr0_x86_64 + regnum - lldb_dr0_i386; + default: + llvm_unreachable("Unhandled i386 register."); + } +} + +int NativeRegisterContextFreeBSD_x86_64::GetSetForNativeRegNum( + int reg_num) const { + + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86: + if (reg_num >= k_first_gpr_i386 && reg_num <= k_last_gpr_i386) + return GPRegSet; + if (reg_num >= k_first_fpr_i386 && reg_num <= k_last_fpr_i386) + return FPRegSet; + if (reg_num >= k_first_avx_i386 && reg_num <= k_last_avx_i386) + return -1; // AVX + if (reg_num >= k_first_mpxr_i386 && reg_num <= k_last_mpxr_i386) + return -1; // MPXR + if (reg_num >= k_first_mpxc_i386 && reg_num <= k_last_mpxc_i386) + return -1; // MPXC + if (reg_num >= k_first_dbr_i386 && reg_num <= k_last_dbr_i386) + return DBRegSet; // DBR + break; + case llvm::Triple::x86_64: + if (reg_num >= k_first_gpr_x86_64 && reg_num <= k_last_gpr_x86_64) + return GPRegSet; + if (reg_num >= k_first_fpr_x86_64 && reg_num <= k_last_fpr_x86_64) + return FPRegSet; + if (reg_num >= k_first_avx_x86_64 && reg_num <= k_last_avx_x86_64) + return -1; // AVX + if (reg_num >= k_first_mpxr_x86_64 && reg_num <= k_last_mpxr_x86_64) + return -1; // MPXR + if (reg_num >= k_first_mpxc_x86_64 && reg_num <= k_last_mpxc_x86_64) + return -1; // MPXC + if (reg_num >= k_first_dbr_x86_64 && reg_num <= k_last_dbr_x86_64) + return DBRegSet; // DBR + break; + default: + llvm_unreachable("Unhandled target architecture."); + } + + llvm_unreachable("Register does not belong to any register set"); +} + +Status NativeRegisterContextFreeBSD_x86_64::ReadRegisterSet(uint32_t set) { + switch (set) { + case GPRegSet: + return DoRegisterSet(PT_GETREGS, &m_gpr); + case FPRegSet: +#if defined(__x86_64__) + return DoRegisterSet(PT_GETFPREGS, &m_fpr); +#else + return DoRegisterSet(PT_GETXMMREGS, &m_fpr); +#endif + case DBRegSet: + return DoRegisterSet(PT_GETDBREGS, &m_dbr); + } + llvm_unreachable("NativeRegisterContextFreeBSD_x86_64::ReadRegisterSet"); +} + +Status NativeRegisterContextFreeBSD_x86_64::WriteRegisterSet(uint32_t set) { + switch (set) { + case GPRegSet: + return DoRegisterSet(PT_SETREGS, &m_gpr); + case FPRegSet: +#if defined(__x86_64__) + return DoRegisterSet(PT_SETFPREGS, &m_fpr); +#else + return DoRegisterSet(PT_SETXMMREGS, &m_fpr); +#endif + case DBRegSet: + return DoRegisterSet(PT_SETDBREGS, &m_dbr); + } + llvm_unreachable("NativeRegisterContextFreeBSD_x86_64::WriteRegisterSet"); +} + +Status +NativeRegisterContextFreeBSD_x86_64::ReadRegister(const RegisterInfo *reg_info, + RegisterValue ®_value) { + Status error; + + if (!reg_info) { + error.SetErrorString("reg_info NULL"); + return error; + } + + uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + if (reg == LLDB_INVALID_REGNUM) { + // This is likely an internal register for lldb use only and should not be + // directly queried. + error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " + "register, cannot read directly", + reg_info->name); + return error; + } + + int set = GetSetForNativeRegNum(reg); + if (set == -1) { + // This is likely an internal register for lldb use only and should not be + // directly queried. + error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", + reg_info->name); + return error; + } + + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86_64: + break; + case llvm::Triple::x86: + reg = RegNumX86ToX86_64(reg); + break; + default: + llvm_unreachable("Unhandled target architecture."); + } + + error = ReadRegisterSet(set); + if (error.Fail()) + return error; + + switch (reg) { +#if defined(__x86_64__) + case lldb_rax_x86_64: + reg_value = (uint64_t)m_gpr.r_rax; + break; + case lldb_rbx_x86_64: + reg_value = (uint64_t)m_gpr.r_rbx; + break; + case lldb_rcx_x86_64: + reg_value = (uint64_t)m_gpr.r_rcx; + break; + case lldb_rdx_x86_64: + reg_value = (uint64_t)m_gpr.r_rdx; + break; + case lldb_rdi_x86_64: + reg_value = (uint64_t)m_gpr.r_rdi; + break; + case lldb_rsi_x86_64: + reg_value = (uint64_t)m_gpr.r_rsi; + break; + case lldb_rbp_x86_64: + reg_value = (uint64_t)m_gpr.r_rbp; + break; + case lldb_rsp_x86_64: + reg_value = (uint64_t)m_gpr.r_rsp; + break; + case lldb_r8_x86_64: + reg_value = (uint64_t)m_gpr.r_r8; + break; + case lldb_r9_x86_64: + reg_value = (uint64_t)m_gpr.r_r9; + break; + case lldb_r10_x86_64: + reg_value = (uint64_t)m_gpr.r_r10; + break; + case lldb_r11_x86_64: + reg_value = (uint64_t)m_gpr.r_r11; + break; + case lldb_r12_x86_64: + reg_value = (uint64_t)m_gpr.r_r12; + break; + case lldb_r13_x86_64: + reg_value = (uint64_t)m_gpr.r_r13; + break; + case lldb_r14_x86_64: + reg_value = (uint64_t)m_gpr.r_r14; + break; + case lldb_r15_x86_64: + reg_value = (uint64_t)m_gpr.r_r15; + break; + case lldb_rip_x86_64: + reg_value = (uint64_t)m_gpr.r_rip; + break; + case lldb_rflags_x86_64: + reg_value = (uint64_t)m_gpr.r_rflags; + break; + case lldb_cs_x86_64: + reg_value = (uint64_t)m_gpr.r_cs; + break; + case lldb_fs_x86_64: + reg_value = (uint64_t)m_gpr.r_fs; + break; + case lldb_gs_x86_64: + reg_value = (uint64_t)m_gpr.r_gs; + break; + case lldb_ss_x86_64: + reg_value = (uint64_t)m_gpr.r_ss; + break; + case lldb_ds_x86_64: + reg_value = (uint64_t)m_gpr.r_ds; + break; + case lldb_es_x86_64: + reg_value = (uint64_t)m_gpr.r_es; + break; +#else + case lldb_rax_x86_64: + reg_value = (uint32_t)m_gpr.r_eax; + break; + case lldb_rbx_x86_64: + reg_value = (uint32_t)m_gpr.r_ebx; + break; + case lldb_rcx_x86_64: + reg_value = (uint32_t)m_gpr.r_ecx; + break; + case lldb_rdx_x86_64: + reg_value = (uint32_t)m_gpr.r_edx; + break; + case lldb_rdi_x86_64: + reg_value = (uint32_t)m_gpr.r_edi; + break; + case lldb_rsi_x86_64: + reg_value = (uint32_t)m_gpr.r_esi; + break; + case lldb_rsp_x86_64: + reg_value = (uint32_t)m_gpr.r_esp; + break; + case lldb_rbp_x86_64: + reg_value = (uint32_t)m_gpr.r_ebp; + break; + case lldb_rip_x86_64: + reg_value = (uint32_t)m_gpr.r_eip; + break; + case lldb_rflags_x86_64: + reg_value = (uint32_t)m_gpr.r_eflags; + break; + case lldb_cs_x86_64: + reg_value = (uint32_t)m_gpr.r_cs; + break; + case lldb_fs_x86_64: + reg_value = (uint32_t)m_gpr.r_fs; + break; + case lldb_gs_x86_64: + reg_value = (uint32_t)m_gpr.r_gs; + break; + case lldb_ss_x86_64: + reg_value = (uint32_t)m_gpr.r_ss; + break; + case lldb_ds_x86_64: + reg_value = (uint32_t)m_gpr.r_ds; + break; + case lldb_es_x86_64: + reg_value = (uint32_t)m_gpr.r_es; + break; +#endif +#if defined(__x86_64__) +// the 32-bit field carries more detail, so we don't have to reinvent +// the wheel +#define FPR_ENV(x) ((struct envxmm32 *)m_fpr.fpr_env)->x +#else +#define FPR_ENV(x) ((struct envxmm *)m_fpr.xmm_env)->x +#endif + case lldb_fctrl_x86_64: + reg_value = (uint16_t)FPR_ENV(en_cw); + break; + case lldb_fstat_x86_64: + reg_value = (uint16_t)FPR_ENV(en_sw); + break; + case lldb_ftag_x86_64: + reg_value = (uint16_t)FPR_ENV(en_tw); + break; + case lldb_fop_x86_64: + reg_value = (uint16_t)FPR_ENV(en_opcode); + break; + case lldb_fiseg_x86_64: + reg_value = (uint32_t)FPR_ENV(en_fcs); + break; + case lldb_fioff_x86_64: + reg_value = (uint32_t)FPR_ENV(en_fip); + break; + case lldb_foseg_x86_64: + reg_value = (uint32_t)FPR_ENV(en_fos); + break; + case lldb_fooff_x86_64: + reg_value = (uint32_t)FPR_ENV(en_foo); + break; + case lldb_mxcsr_x86_64: + reg_value = (uint32_t)FPR_ENV(en_mxcsr); + break; + case lldb_mxcsrmask_x86_64: + reg_value = (uint32_t)FPR_ENV(en_mxcsr_mask); + break; + case lldb_st0_x86_64: + case lldb_st1_x86_64: + case lldb_st2_x86_64: + case lldb_st3_x86_64: + case lldb_st4_x86_64: + case lldb_st5_x86_64: + case lldb_st6_x86_64: + case lldb_st7_x86_64: +#if defined(__x86_64__) + reg_value.SetBytes(&m_fpr.fpr_acc[reg - lldb_st0_x86_64], + reg_info->byte_size, endian::InlHostByteOrder()); +#else + reg_value.SetBytes(&m_fpr.xmm_acc[reg - lldb_st0_x86_64], + reg_info->byte_size, endian::InlHostByteOrder()); +#endif + break; + case lldb_mm0_x86_64: + case lldb_mm1_x86_64: + case lldb_mm2_x86_64: + case lldb_mm3_x86_64: + case lldb_mm4_x86_64: + case lldb_mm5_x86_64: + case lldb_mm6_x86_64: + case lldb_mm7_x86_64: +#if defined(__x86_64__) + reg_value.SetBytes(&m_fpr.fpr_acc[reg - lldb_mm0_x86_64], + reg_info->byte_size, endian::InlHostByteOrder()); +#else + reg_value.SetBytes(&m_fpr.xmm_acc[reg - lldb_mm0_x86_64], + reg_info->byte_size, endian::InlHostByteOrder()); +#endif + break; + case lldb_xmm0_x86_64: + case lldb_xmm1_x86_64: + case lldb_xmm2_x86_64: + case lldb_xmm3_x86_64: + case lldb_xmm4_x86_64: + case lldb_xmm5_x86_64: + case lldb_xmm6_x86_64: + case lldb_xmm7_x86_64: + case lldb_xmm8_x86_64: + case lldb_xmm9_x86_64: + case lldb_xmm10_x86_64: + case lldb_xmm11_x86_64: + case lldb_xmm12_x86_64: + case lldb_xmm13_x86_64: + case lldb_xmm14_x86_64: + case lldb_xmm15_x86_64: +#if defined(__x86_64__) + reg_value.SetBytes(&m_fpr.fpr_xacc[reg - lldb_xmm0_x86_64], + reg_info->byte_size, endian::InlHostByteOrder()); +#else + reg_value.SetBytes(&m_fpr.xmm_reg[reg - lldb_xmm0_x86_64], + reg_info->byte_size, endian::InlHostByteOrder()); +#endif + break; + case lldb_dr0_x86_64: + case lldb_dr1_x86_64: + case lldb_dr2_x86_64: + case lldb_dr3_x86_64: + case lldb_dr4_x86_64: + case lldb_dr5_x86_64: + case lldb_dr6_x86_64: + case lldb_dr7_x86_64: + reg_value = (uint64_t)m_dbr.dr[reg - lldb_dr0_x86_64]; + break; + default: + llvm_unreachable("Reading unknown/unsupported register"); + } + + return error; +} + +Status NativeRegisterContextFreeBSD_x86_64::WriteRegister( + const RegisterInfo *reg_info, const RegisterValue ®_value) { + + Status error; + + if (!reg_info) { + error.SetErrorString("reg_info NULL"); + return error; + } + + uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + if (reg == LLDB_INVALID_REGNUM) { + // This is likely an internal register for lldb use only and should not be + // directly queried. + error.SetErrorStringWithFormat("register \"%s\" is an internal-only lldb " + "register, cannot read directly", + reg_info->name); + return error; + } + + int set = GetSetForNativeRegNum(reg); + if (set == -1) { + // This is likely an internal register for lldb use only and should not be + // directly queried. + error.SetErrorStringWithFormat("register \"%s\" is in unrecognized set", + reg_info->name); + return error; + } + + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86_64: + break; + case llvm::Triple::x86: + reg = RegNumX86ToX86_64(reg); + break; + default: + llvm_unreachable("Unhandled target architecture."); + } + + error = ReadRegisterSet(set); + if (error.Fail()) + return error; + + switch (reg) { +#if defined(__x86_64__) + case lldb_rax_x86_64: + m_gpr.r_rax = reg_value.GetAsUInt64(); + break; + case lldb_rbx_x86_64: + m_gpr.r_rbx = reg_value.GetAsUInt64(); + break; + case lldb_rcx_x86_64: + m_gpr.r_rcx = reg_value.GetAsUInt64(); + break; + case lldb_rdx_x86_64: + m_gpr.r_rdx = reg_value.GetAsUInt64(); + break; + case lldb_rdi_x86_64: + m_gpr.r_rdi = reg_value.GetAsUInt64(); + break; + case lldb_rsi_x86_64: + m_gpr.r_rsi = reg_value.GetAsUInt64(); + break; + case lldb_rbp_x86_64: + m_gpr.r_rbp = reg_value.GetAsUInt64(); + break; + case lldb_rsp_x86_64: + m_gpr.r_rsp = reg_value.GetAsUInt64(); + break; + case lldb_r8_x86_64: + m_gpr.r_r8 = reg_value.GetAsUInt64(); + break; + case lldb_r9_x86_64: + m_gpr.r_r9 = reg_value.GetAsUInt64(); + break; + case lldb_r10_x86_64: + m_gpr.r_r10 = reg_value.GetAsUInt64(); + break; + case lldb_r11_x86_64: + m_gpr.r_r11 = reg_value.GetAsUInt64(); + break; + case lldb_r12_x86_64: + m_gpr.r_r12 = reg_value.GetAsUInt64(); + break; + case lldb_r13_x86_64: + m_gpr.r_r13 = reg_value.GetAsUInt64(); + break; + case lldb_r14_x86_64: + m_gpr.r_r14 = reg_value.GetAsUInt64(); + break; + case lldb_r15_x86_64: + m_gpr.r_r15 = reg_value.GetAsUInt64(); + break; + case lldb_rip_x86_64: + m_gpr.r_rip = reg_value.GetAsUInt64(); + break; + case lldb_rflags_x86_64: + m_gpr.r_rflags = reg_value.GetAsUInt64(); + break; + case lldb_cs_x86_64: + m_gpr.r_cs = reg_value.GetAsUInt64(); + break; + case lldb_fs_x86_64: + m_gpr.r_fs = reg_value.GetAsUInt64(); + break; + case lldb_gs_x86_64: + m_gpr.r_gs = reg_value.GetAsUInt64(); + break; + case lldb_ss_x86_64: + m_gpr.r_ss = reg_value.GetAsUInt64(); + break; + case lldb_ds_x86_64: + m_gpr.r_ds = reg_value.GetAsUInt64(); + break; + case lldb_es_x86_64: + m_gpr.r_es = reg_value.GetAsUInt64(); + break; +#else + case lldb_rax_x86_64: + m_gpr.r_eax = reg_value.GetAsUInt32(); + break; + case lldb_rbx_x86_64: + m_gpr.r_ebx = reg_value.GetAsUInt32(); + break; + case lldb_rcx_x86_64: + m_gpr.r_ecx = reg_value.GetAsUInt32(); + break; + case lldb_rdx_x86_64: + m_gpr.r_edx = reg_value.GetAsUInt32(); + break; + case lldb_rdi_x86_64: + m_gpr.r_edi = reg_value.GetAsUInt32(); + break; + case lldb_rsi_x86_64: + m_gpr.r_esi = reg_value.GetAsUInt32(); + break; + case lldb_rsp_x86_64: + m_gpr.r_esp = reg_value.GetAsUInt32(); + break; + case lldb_rbp_x86_64: + m_gpr.r_ebp = reg_value.GetAsUInt32(); + break; + case lldb_rip_x86_64: + m_gpr.r_eip = reg_value.GetAsUInt32(); + break; + case lldb_rflags_x86_64: + m_gpr.r_eflags = reg_value.GetAsUInt32(); + break; + case lldb_cs_x86_64: + m_gpr.r_cs = reg_value.GetAsUInt32(); + break; + case lldb_fs_x86_64: + m_gpr.r_fs = reg_value.GetAsUInt32(); + break; + case lldb_gs_x86_64: + m_gpr.r_gs = reg_value.GetAsUInt32(); + break; + case lldb_ss_x86_64: + m_gpr.r_ss = reg_value.GetAsUInt32(); + break; + case lldb_ds_x86_64: + m_gpr.r_ds = reg_value.GetAsUInt32(); + break; + case lldb_es_x86_64: + m_gpr.r_es = reg_value.GetAsUInt32(); + break; +#endif + case lldb_fctrl_x86_64: + FPR_ENV(en_cw) = reg_value.GetAsUInt16(); + break; + case lldb_fstat_x86_64: + FPR_ENV(en_sw) = reg_value.GetAsUInt16(); + break; + case lldb_ftag_x86_64: + FPR_ENV(en_tw) = reg_value.GetAsUInt16(); + break; + case lldb_fop_x86_64: + FPR_ENV(en_opcode) = reg_value.GetAsUInt16(); + break; + case lldb_fiseg_x86_64: + FPR_ENV(en_fcs) = reg_value.GetAsUInt32(); + break; + case lldb_fioff_x86_64: + FPR_ENV(en_fip) = reg_value.GetAsUInt32(); + break; + case lldb_foseg_x86_64: + FPR_ENV(en_fos) = reg_value.GetAsUInt32(); + break; + case lldb_fooff_x86_64: + FPR_ENV(en_foo) = reg_value.GetAsUInt32(); + break; + case lldb_mxcsr_x86_64: + FPR_ENV(en_mxcsr) = reg_value.GetAsUInt32(); + break; + case lldb_mxcsrmask_x86_64: + FPR_ENV(en_mxcsr_mask) = reg_value.GetAsUInt32(); + break; + case lldb_st0_x86_64: + case lldb_st1_x86_64: + case lldb_st2_x86_64: + case lldb_st3_x86_64: + case lldb_st4_x86_64: + case lldb_st5_x86_64: + case lldb_st6_x86_64: + case lldb_st7_x86_64: +#if defined(__x86_64__) + ::memcpy(&m_fpr.fpr_acc[reg - lldb_st0_x86_64], reg_value.GetBytes(), + reg_value.GetByteSize()); +#else + ::memcpy(&m_fpr.xmm_acc[reg - lldb_st0_x86_64], reg_value.GetBytes(), + reg_value.GetByteSize()); +#endif + break; + case lldb_mm0_x86_64: + case lldb_mm1_x86_64: + case lldb_mm2_x86_64: + case lldb_mm3_x86_64: + case lldb_mm4_x86_64: + case lldb_mm5_x86_64: + case lldb_mm6_x86_64: + case lldb_mm7_x86_64: +#if defined(__x86_64__) + ::memcpy(&m_fpr.fpr_acc[reg - lldb_mm0_x86_64], reg_value.GetBytes(), + reg_value.GetByteSize()); +#else + ::memcpy(&m_fpr.xmm_acc[reg - lldb_mm0_x86_64], reg_value.GetBytes(), + reg_value.GetByteSize()); +#endif + break; + case lldb_xmm0_x86_64: + case lldb_xmm1_x86_64: + case lldb_xmm2_x86_64: + case lldb_xmm3_x86_64: + case lldb_xmm4_x86_64: + case lldb_xmm5_x86_64: + case lldb_xmm6_x86_64: + case lldb_xmm7_x86_64: + case lldb_xmm8_x86_64: + case lldb_xmm9_x86_64: + case lldb_xmm10_x86_64: + case lldb_xmm11_x86_64: + case lldb_xmm12_x86_64: + case lldb_xmm13_x86_64: + case lldb_xmm14_x86_64: + case lldb_xmm15_x86_64: +#if defined(__x86_64__) + ::memcpy(&m_fpr.fpr_xacc[reg - lldb_xmm0_x86_64], reg_value.GetBytes(), + reg_value.GetByteSize()); +#else + ::memcpy(&m_fpr.xmm_reg[reg - lldb_xmm0_x86_64], reg_value.GetBytes(), + reg_value.GetByteSize()); +#endif + break; + case lldb_dr0_x86_64: + case lldb_dr1_x86_64: + case lldb_dr2_x86_64: + case lldb_dr3_x86_64: + case lldb_dr4_x86_64: + case lldb_dr5_x86_64: + case lldb_dr6_x86_64: + case lldb_dr7_x86_64: + m_dbr.dr[reg - lldb_dr0_x86_64] = reg_value.GetAsUInt64(); + break; + default: + llvm_unreachable("Reading unknown/unsupported register"); + } + + return WriteRegisterSet(set); +} + +Status NativeRegisterContextFreeBSD_x86_64::ReadAllRegisterValues( + lldb::DataBufferSP &data_sp) { + Status error; + + data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0)); + error = ReadRegisterSet(GPRegSet); + if (error.Fail()) + return error; + + uint8_t *dst = data_sp->GetBytes(); + ::memcpy(dst, &m_gpr, GetRegisterInfoInterface().GetGPRSize()); + dst += GetRegisterInfoInterface().GetGPRSize(); + + return error; +} + +Status NativeRegisterContextFreeBSD_x86_64::WriteAllRegisterValues( + const lldb::DataBufferSP &data_sp) { + Status error; + + if (!data_sp) { + error.SetErrorStringWithFormat( + "NativeRegisterContextFreeBSD_x86_64::%s invalid data_sp provided", + __FUNCTION__); + return error; + } + + if (data_sp->GetByteSize() != REG_CONTEXT_SIZE) { + error.SetErrorStringWithFormat( + "NativeRegisterContextFreeBSD_x86_64::%s data_sp contained mismatched " + "data size, expected %zu, actual %" PRIu64, + __FUNCTION__, REG_CONTEXT_SIZE, data_sp->GetByteSize()); + return error; + } + + uint8_t *src = data_sp->GetBytes(); + if (src == nullptr) { + error.SetErrorStringWithFormat("NativeRegisterContextFreeBSD_x86_64::%s " + "DataBuffer::GetBytes() returned a null " + "pointer", + __FUNCTION__); + return error; + } + ::memcpy(&m_gpr, src, GetRegisterInfoInterface().GetGPRSize()); + + error = WriteRegisterSet(GPRegSet); + if (error.Fail()) + return error; + src += GetRegisterInfoInterface().GetGPRSize(); + + return error; +} + +int NativeRegisterContextFreeBSD_x86_64::GetDR(int num) const { + assert(num >= 0 && num <= 7); + switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) { + case llvm::Triple::x86: + return lldb_dr0_i386 + num; + case llvm::Triple::x86_64: + return lldb_dr0_x86_64 + num; + default: + llvm_unreachable("Unhandled target architecture."); + } +} + +Status NativeRegisterContextFreeBSD_x86_64::IsWatchpointHit(uint32_t wp_index, + bool &is_hit) { + if (wp_index >= NumSupportedHardwareWatchpoints()) + return Status("Watchpoint index out of range"); + + RegisterValue reg_value; + const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(GetDR(6)); + Status error = ReadRegister(reg_info, reg_value); + if (error.Fail()) { + is_hit = false; + return error; + } + + uint64_t status_bits = reg_value.GetAsUInt64(); + + is_hit = status_bits & (1 << wp_index); + + return error; +} + +Status NativeRegisterContextFreeBSD_x86_64::GetWatchpointHitIndex( + uint32_t &wp_index, lldb::addr_t trap_addr) { + uint32_t num_hw_wps = NumSupportedHardwareWatchpoints(); + for (wp_index = 0; wp_index < num_hw_wps; ++wp_index) { + bool is_hit; + Status error = IsWatchpointHit(wp_index, is_hit); + if (error.Fail()) { + wp_index = LLDB_INVALID_INDEX32; + return error; + } else if (is_hit) { + return error; + } + } + wp_index = LLDB_INVALID_INDEX32; + return Status(); +} + +Status +NativeRegisterContextFreeBSD_x86_64::IsWatchpointVacant(uint32_t wp_index, + bool &is_vacant) { + if (wp_index >= NumSupportedHardwareWatchpoints()) + return Status("Watchpoint index out of range"); + + RegisterValue reg_value; + const RegisterInfo *const reg_info = GetRegisterInfoAtIndex(GetDR(7)); + Status error = ReadRegister(reg_info, reg_value); + if (error.Fail()) { + is_vacant = false; + return error; + } + + uint64_t control_bits = reg_value.GetAsUInt64(); + + is_vacant = !(control_bits & (1 << (2 * wp_index + 1))); + + return error; +} + +Status NativeRegisterContextFreeBSD_x86_64::SetHardwareWatchpointWithIndex( + lldb::addr_t addr, size_t size, uint32_t watch_flags, uint32_t wp_index) { + + if (wp_index >= NumSupportedHardwareWatchpoints()) + return Status("Watchpoint index out of range"); + + // Read only watchpoints aren't supported on x86_64. Fall back to read/write + // waitchpoints instead. + // TODO: Add logic to detect when a write happens and ignore that watchpoint + // hit. + if (watch_flags == 0x2) + watch_flags = 0x3; + + if (watch_flags != 0x1 && watch_flags != 0x3) + return Status("Invalid read/write bits for watchpoint"); + + if (size != 1 && size != 2 && size != 4 && size != 8) + return Status("Invalid size for watchpoint"); + + bool is_vacant; + Status error = IsWatchpointVacant(wp_index, is_vacant); + if (error.Fail()) + return error; + if (!is_vacant) + return Status("Watchpoint index not vacant"); + + const RegisterInfo *const reg_info_dr7 = GetRegisterInfoAtIndex(GetDR(7)); + RegisterValue dr7_value; + error = ReadRegister(reg_info_dr7, dr7_value); + if (error.Fail()) + return error; + + // for watchpoints 0, 1, 2, or 3, respectively, set bits 1, 3, 5, or 7 + uint64_t enable_bit = 1 << (2 * wp_index + 1); + + // set bits 16-17, 20-21, 24-25, or 28-29 + // with 0b01 for write, and 0b11 for read/write + uint64_t rw_bits = watch_flags << (16 + 4 * wp_index); + + // set bits 18-19, 22-23, 26-27, or 30-31 + // with 0b00, 0b01, 0b10, or 0b11 + // for 1, 2, 8 (if supported), or 4 bytes, respectively + uint64_t size_bits = (size == 8 ? 0x2 : size - 1) << (18 + 4 * wp_index); + + uint64_t bit_mask = (0x3 << (2 * wp_index)) | (0xF << (16 + 4 * wp_index)); + + uint64_t control_bits = dr7_value.GetAsUInt64() & ~bit_mask; + + control_bits |= enable_bit | rw_bits | size_bits; + + const RegisterInfo *const reg_info_drN = + GetRegisterInfoAtIndex(GetDR(wp_index)); + RegisterValue drN_value; + error = ReadRegister(reg_info_drN, drN_value); + if (error.Fail()) + return error; + + // clear dr6 if address or bits changed (i.e. we're not reenabling the same + // watchpoint) + if (drN_value.GetAsUInt64() != addr || + (dr7_value.GetAsUInt64() & bit_mask) != (rw_bits | size_bits)) { + ClearWatchpointHit(wp_index); + + error = WriteRegister(reg_info_drN, RegisterValue(addr)); + if (error.Fail()) + return error; + } + + error = WriteRegister(reg_info_dr7, RegisterValue(control_bits)); + if (error.Fail()) + return error; + + error.Clear(); + return error; +} + +bool NativeRegisterContextFreeBSD_x86_64::ClearHardwareWatchpoint( + uint32_t wp_index) { + if (wp_index >= NumSupportedHardwareWatchpoints()) + return false; + + // for watchpoints 0, 1, 2, or 3, respectively, clear bits 0-1, 2-3, 4-5 + // or 6-7 of the debug control register (DR7) + const RegisterInfo *const reg_info_dr7 = GetRegisterInfoAtIndex(GetDR(7)); + RegisterValue reg_value; + Status error = ReadRegister(reg_info_dr7, reg_value); + if (error.Fail()) + return false; + uint64_t bit_mask = 0x3 << (2 * wp_index); + uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; + + return WriteRegister(reg_info_dr7, RegisterValue(control_bits)).Success(); +} + +Status +NativeRegisterContextFreeBSD_x86_64::ClearWatchpointHit(uint32_t wp_index) { + if (wp_index >= NumSupportedHardwareWatchpoints()) + return Status("Watchpoint index out of range"); + + // for watchpoints 0, 1, 2, or 3, respectively, check bits 0, 1, 2, or 3 of + // the debug status register (DR6) + const RegisterInfo *const reg_info_dr6 = GetRegisterInfoAtIndex(GetDR(6)); + RegisterValue reg_value; + Status error = ReadRegister(reg_info_dr6, reg_value); + if (error.Fail()) + return error; + + uint64_t bit_mask = 1 << wp_index; + uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; + return WriteRegister(reg_info_dr6, RegisterValue(status_bits)); +} + +Status NativeRegisterContextFreeBSD_x86_64::ClearAllHardwareWatchpoints() { + RegisterValue reg_value; + + // clear bits {0-4} of the debug status register (DR6) + const RegisterInfo *const reg_info_dr6 = GetRegisterInfoAtIndex(GetDR(6)); + Status error = ReadRegister(reg_info_dr6, reg_value); + if (error.Fail()) + return error; + uint64_t bit_mask = 0xF; + uint64_t status_bits = reg_value.GetAsUInt64() & ~bit_mask; + error = WriteRegister(reg_info_dr6, RegisterValue(status_bits)); + if (error.Fail()) + return error; + + // clear bits {0-7,16-31} of the debug control register (DR7) + const RegisterInfo *const reg_info_dr7 = GetRegisterInfoAtIndex(GetDR(7)); + error = ReadRegister(reg_info_dr7, reg_value); + if (error.Fail()) + return error; + bit_mask = 0xFF | (0xFFFF << 16); + uint64_t control_bits = reg_value.GetAsUInt64() & ~bit_mask; + return WriteRegister(reg_info_dr7, RegisterValue(control_bits)); +} + +uint32_t NativeRegisterContextFreeBSD_x86_64::SetHardwareWatchpoint( + lldb::addr_t addr, size_t size, uint32_t watch_flags) { + Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS)); + const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); + for (uint32_t wp_index = 0; wp_index < num_hw_watchpoints; ++wp_index) { + bool is_vacant; + Status error = IsWatchpointVacant(wp_index, is_vacant); + if (is_vacant) { + error = SetHardwareWatchpointWithIndex(addr, size, watch_flags, wp_index); + if (error.Success()) + return wp_index; + } + if (error.Fail() && log) { + LLDB_LOGF(log, "NativeRegisterContextFreeBSD_x86_64::%s Error: %s", + __FUNCTION__, error.AsCString()); + } + } + return LLDB_INVALID_INDEX32; +} + +lldb::addr_t +NativeRegisterContextFreeBSD_x86_64::GetWatchpointAddress(uint32_t wp_index) { + if (wp_index >= NumSupportedHardwareWatchpoints()) + return LLDB_INVALID_ADDRESS; + RegisterValue reg_value; + const RegisterInfo *const reg_info_drN = + GetRegisterInfoAtIndex(GetDR(wp_index)); + if (ReadRegister(reg_info_drN, reg_value).Fail()) + return LLDB_INVALID_ADDRESS; + return reg_value.GetAsUInt64(); +} + +uint32_t +NativeRegisterContextFreeBSD_x86_64::NumSupportedHardwareWatchpoints() { + // Available debug address registers: dr0, dr1, dr2, dr3 + return 4; +} + +Status NativeRegisterContextFreeBSD_x86_64::CopyHardwareWatchpointsFrom( + NativeRegisterContextFreeBSD &source) { + auto &r_source = static_cast(source); + Status res = r_source.ReadRegisterSet(DBRegSet); + if (!res.Fail()) { + // copy dbregs only if any watchpoints were set + if ((r_source.m_dbr.dr[7] & 0xFF) == 0) + return res; + + m_dbr = r_source.m_dbr; + res = WriteRegisterSet(DBRegSet); + } + return res; +} + +#endif // defined(__x86_64__) Index: lldb/source/Plugins/Process/FreeBSDRemote/NativeThreadFreeBSD.h =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/NativeThreadFreeBSD.h @@ -0,0 +1,83 @@ +//===-- NativeThreadFreeBSD.h --------------------------------- -*- 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 +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_NativeThreadFreeBSD_H_ +#define liblldb_NativeThreadFreeBSD_H_ + +#include "lldb/Host/common/NativeThreadProtocol.h" + +#include "Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD.h" + +#include +#include +#include + +namespace lldb_private { +namespace process_freebsd { + +class NativeProcessFreeBSD; + +class NativeThreadFreeBSD : public NativeThreadProtocol { + friend class NativeProcessFreeBSD; + +public: + NativeThreadFreeBSD(NativeProcessFreeBSD &process, lldb::tid_t tid); + + // NativeThreadProtocol Interface + std::string GetName() override; + + lldb::StateType GetState() override; + + bool GetStopReason(ThreadStopInfo &stop_info, + std::string &description) override; + + NativeRegisterContextFreeBSD &GetRegisterContext() override; + + Status SetWatchpoint(lldb::addr_t addr, size_t size, uint32_t watch_flags, + bool hardware) override; + + Status RemoveWatchpoint(lldb::addr_t addr) override; + + Status SetHardwareBreakpoint(lldb::addr_t addr, size_t size) override; + + Status RemoveHardwareBreakpoint(lldb::addr_t addr) override; + +private: + // Interface for friend classes + + Status Resume(); + Status SingleStep(); + Status Suspend(); + + void SetStoppedBySignal(uint32_t signo, const siginfo_t *info = nullptr); + void SetStoppedByBreakpoint(); + void SetStoppedByTrace(); + void SetStoppedByExec(); + void SetStoppedByWatchpoint(uint32_t wp_index); + void SetStoppedWithNoReason(); + void SetStopped(); + void SetRunning(); + void SetStepping(); + + Status CopyWatchpointsFrom(NativeThreadFreeBSD &source); + + // Member Variables + lldb::StateType m_state; + ThreadStopInfo m_stop_info; + std::unique_ptr m_reg_context_up; + std::string m_stop_description; + using WatchpointIndexMap = std::map; + WatchpointIndexMap m_watchpoint_index_map; + WatchpointIndexMap m_hw_break_index_map; +}; + +typedef std::shared_ptr NativeThreadFreeBSDSP; +} // namespace process_freebsd +} // namespace lldb_private + +#endif // #ifndef liblldb_NativeThreadFreeBSD_H_ Index: lldb/source/Plugins/Process/FreeBSDRemote/NativeThreadFreeBSD.cpp =================================================================== --- /dev/null +++ lldb/source/Plugins/Process/FreeBSDRemote/NativeThreadFreeBSD.cpp @@ -0,0 +1,216 @@ +//===-- NativeThreadFreeBSD.cpp -------------------------------------------===// +// +// 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 "NativeThreadFreeBSD.h" +#include "NativeRegisterContextFreeBSD.h" + +#include "NativeProcessFreeBSD.h" + +#include "Plugins/Process/POSIX/CrashReason.h" +#include "Plugins/Process/POSIX/ProcessPOSIXLog.h" +#include "lldb/Utility/LLDBAssert.h" +#include "lldb/Utility/RegisterValue.h" +#include "lldb/Utility/State.h" +#include "llvm/Support/Errno.h" + +// clang-format off +#include +#include +#include +// clang-format on + +#include + +using namespace lldb; +using namespace lldb_private; +using namespace lldb_private::process_freebsd; + +NativeThreadFreeBSD::NativeThreadFreeBSD(NativeProcessFreeBSD &process, + lldb::tid_t tid) + : NativeThreadProtocol(process, tid), m_state(StateType::eStateInvalid), + m_stop_info(), + m_reg_context_up( + NativeRegisterContextFreeBSD::CreateHostNativeRegisterContextFreeBSD( + process.GetArchitecture(), *this)), + m_stop_description() {} + +Status NativeThreadFreeBSD::Resume() { + Status ret = NativeProcessFreeBSD::PtraceWrapper(PT_RESUME, m_process.GetID(), + nullptr, GetID()); + if (!ret.Success()) + return ret; + ret = NativeProcessFreeBSD::PtraceWrapper(PT_CLEARSTEP, m_process.GetID(), + nullptr, GetID()); + if (ret.Success()) + SetRunning(); + return ret; +} + +Status NativeThreadFreeBSD::SingleStep() { + Status ret = NativeProcessFreeBSD::PtraceWrapper(PT_RESUME, m_process.GetID(), + nullptr, GetID()); + if (!ret.Success()) + return ret; + ret = NativeProcessFreeBSD::PtraceWrapper(PT_SETSTEP, m_process.GetID(), + nullptr, GetID()); + if (ret.Success()) + SetStepping(); + return ret; +} + +Status NativeThreadFreeBSD::Suspend() { + Status ret = NativeProcessFreeBSD::PtraceWrapper( + PT_SUSPEND, m_process.GetID(), nullptr, GetID()); + if (ret.Success()) + SetStopped(); + return ret; +} + +void NativeThreadFreeBSD::SetStoppedBySignal(uint32_t signo, + const siginfo_t *info) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD)); + LLDB_LOG(log, "tid = {0} in called with signal {1}", GetID(), signo); + + SetStopped(); + + m_stop_info.reason = StopReason::eStopReasonSignal; + m_stop_info.details.signal.signo = signo; + + m_stop_description.clear(); + if (info) { + switch (signo) { + case SIGSEGV: + case SIGBUS: + case SIGFPE: + case SIGILL: + const auto reason = GetCrashReason(*info); + m_stop_description = GetCrashReasonString(reason, *info); + break; + } + } +} + +void NativeThreadFreeBSD::SetStoppedByBreakpoint() { + SetStopped(); + m_stop_info.reason = StopReason::eStopReasonBreakpoint; + m_stop_info.details.signal.signo = SIGTRAP; +} + +void NativeThreadFreeBSD::SetStoppedByTrace() { + SetStopped(); + m_stop_info.reason = StopReason::eStopReasonTrace; + m_stop_info.details.signal.signo = SIGTRAP; +} + +void NativeThreadFreeBSD::SetStoppedByExec() { + SetStopped(); + m_stop_info.reason = StopReason::eStopReasonExec; + m_stop_info.details.signal.signo = SIGTRAP; +} + +void NativeThreadFreeBSD::SetStoppedByWatchpoint(uint32_t wp_index) { + SetStopped(); +} + +void NativeThreadFreeBSD::SetStoppedWithNoReason() { + SetStopped(); + + m_stop_info.reason = StopReason::eStopReasonNone; + m_stop_info.details.signal.signo = 0; +} + +void NativeThreadFreeBSD::SetStopped() { + const StateType new_state = StateType::eStateStopped; + m_state = new_state; + m_stop_description.clear(); +} + +void NativeThreadFreeBSD::SetRunning() { + m_state = StateType::eStateRunning; + m_stop_info.reason = StopReason::eStopReasonNone; +} + +void NativeThreadFreeBSD::SetStepping() { + m_state = StateType::eStateStepping; + m_stop_info.reason = StopReason::eStopReasonNone; +} + +std::string NativeThreadFreeBSD::GetName() { return ""; } + +lldb::StateType NativeThreadFreeBSD::GetState() { return m_state; } + +bool NativeThreadFreeBSD::GetStopReason(ThreadStopInfo &stop_info, + std::string &description) { + Log *log(ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_THREAD)); + description.clear(); + + switch (m_state) { + case eStateStopped: + case eStateCrashed: + case eStateExited: + case eStateSuspended: + case eStateUnloaded: + stop_info = m_stop_info; + description = m_stop_description; + + return true; + + case eStateInvalid: + case eStateConnected: + case eStateAttaching: + case eStateLaunching: + case eStateRunning: + case eStateStepping: + case eStateDetached: + LLDB_LOG(log, "tid = {0} in state {1} cannot answer stop reason", GetID(), + StateAsCString(m_state)); + return false; + } + llvm_unreachable("unhandled StateType!"); +} + +NativeRegisterContextFreeBSD &NativeThreadFreeBSD::GetRegisterContext() { + assert(m_reg_context_up); + return *m_reg_context_up; +} + +Status NativeThreadFreeBSD::SetWatchpoint(lldb::addr_t addr, size_t size, + uint32_t watch_flags, bool hardware) { + return Status("not implemented"); +} + +Status NativeThreadFreeBSD::RemoveWatchpoint(lldb::addr_t addr) { + auto wp = m_watchpoint_index_map.find(addr); + if (wp == m_watchpoint_index_map.end()) + return Status(); + return Status("not implemented"); +} + +Status NativeThreadFreeBSD::SetHardwareBreakpoint(lldb::addr_t addr, + size_t size) { + if (m_state == eStateLaunching) + return Status(); + + Status error = RemoveHardwareBreakpoint(addr); + if (error.Fail()) + return error; + + return Status("not implemented"); +} + +Status NativeThreadFreeBSD::RemoveHardwareBreakpoint(lldb::addr_t addr) { + auto bp = m_hw_break_index_map.find(addr); + if (bp == m_hw_break_index_map.end()) + return Status(); + + return Status("not implemented"); +} + +Status NativeThreadFreeBSD::CopyWatchpointsFrom(NativeThreadFreeBSD &source) { + return Status("not implemented"); +} Index: lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp =================================================================== --- lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp +++ lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp @@ -843,7 +843,7 @@ response.PutCString(";QListThreadsInStopReply+"); response.PutCString(";qEcho+"); response.PutCString(";qXfer:features:read+"); -#if defined(__linux__) || defined(__NetBSD__) +#if defined(__linux__) || defined(__NetBSD__) || defined(__FreeBSD__) response.PutCString(";QPassSignals+"); response.PutCString(";qXfer:auxv:read+"); response.PutCString(";qXfer:libraries-svr4:read+"); Index: lldb/test/Shell/lit.cfg.py =================================================================== --- lldb/test/Shell/lit.cfg.py +++ lldb/test/Shell/lit.cfg.py @@ -133,3 +133,6 @@ can_set_dbregs = False if can_set_dbregs: config.available_features.add('dbregs-set') + +# pass control variable through +llvm_config.with_system_environment('FREEBSD_REMOTE_PLUGIN') Index: lldb/tools/lldb-server/CMakeLists.txt =================================================================== --- lldb/tools/lldb-server/CMakeLists.txt +++ lldb/tools/lldb-server/CMakeLists.txt @@ -4,6 +4,12 @@ list(APPEND LLDB_PLUGINS lldbPluginProcessLinux) endif() +if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD") + list(APPEND LLDB_PLUGINS + lldbPluginProcessFreeBSDRemote + lldbPluginProcessFreeBSD) +endif() + if(CMAKE_SYSTEM_NAME MATCHES "NetBSD") list(APPEND LLDB_PLUGINS lldbPluginProcessNetBSD) endif() Index: lldb/tools/lldb-server/lldb-gdbserver.cpp =================================================================== --- lldb/tools/lldb-server/lldb-gdbserver.cpp +++ lldb/tools/lldb-server/lldb-gdbserver.cpp @@ -38,6 +38,8 @@ #if defined(__linux__) #include "Plugins/Process/Linux/NativeProcessLinux.h" +#elif defined(__FreeBSD__) +#include "Plugins/Process/FreeBSDRemote/NativeProcessFreeBSD.h" #elif defined(__NetBSD__) #include "Plugins/Process/NetBSD/NativeProcessNetBSD.h" #elif defined(_WIN32) @@ -61,6 +63,8 @@ namespace { #if defined(__linux__) typedef process_linux::NativeProcessLinux::Factory NativeProcessFactory; +#elif defined(__FreeBSD__) +typedef process_freebsd::NativeProcessFreeBSD::Factory NativeProcessFactory; #elif defined(__NetBSD__) typedef process_netbsd::NativeProcessNetBSD::Factory NativeProcessFactory; #elif defined(_WIN32)