diff options
Diffstat (limited to 'source/Plugins/Process/FreeBSD')
20 files changed, 4630 insertions, 65 deletions
diff --git a/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp b/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp index 493f36c..cce7a1e 100644 --- a/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp +++ b/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp @@ -11,6 +11,7 @@ // C++ Includes // Other libraries and framework includes #include "lldb/Core/State.h" +#include "lldb/Target/UnixSignals.h" // Project includes #include "FreeBSDThread.h" diff --git a/source/Plugins/Process/FreeBSD/POSIXStopInfo.cpp b/source/Plugins/Process/FreeBSD/POSIXStopInfo.cpp new file mode 100644 index 0000000..3b8cea7 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/POSIXStopInfo.cpp @@ -0,0 +1,92 @@ +//===-- POSIXStopInfo.cpp ---------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "POSIXStopInfo.h" + +using namespace lldb; +using namespace lldb_private; + + +//===----------------------------------------------------------------------===// +// POSIXLimboStopInfo + +POSIXLimboStopInfo::~POSIXLimboStopInfo() { } + +lldb::StopReason +POSIXLimboStopInfo::GetStopReason() const +{ + return lldb::eStopReasonThreadExiting; +} + +const char * +POSIXLimboStopInfo::GetDescription() +{ + return "thread exiting"; +} + +bool +POSIXLimboStopInfo::ShouldStop(Event *event_ptr) +{ + return false; +} + +bool +POSIXLimboStopInfo::ShouldNotify(Event *event_ptr) +{ + return false; +} + +//===----------------------------------------------------------------------===// +// POSIXCrashStopInfo + +POSIXCrashStopInfo::POSIXCrashStopInfo(POSIXThread &thread, + uint32_t status, + CrashReason reason, + lldb::addr_t fault_addr) + : POSIXStopInfo(thread, status) +{ + m_description = ::GetCrashReasonString(reason, fault_addr); +} + +POSIXCrashStopInfo::~POSIXCrashStopInfo() { } + +lldb::StopReason +POSIXCrashStopInfo::GetStopReason() const +{ + return lldb::eStopReasonException; +} + +//===----------------------------------------------------------------------===// +// POSIXNewThreadStopInfo + +POSIXNewThreadStopInfo::~POSIXNewThreadStopInfo() { } + +lldb::StopReason +POSIXNewThreadStopInfo::GetStopReason() const +{ + return lldb::eStopReasonNone; +} + +const char * +POSIXNewThreadStopInfo::GetDescription() +{ + return "thread spawned"; +} + +bool +POSIXNewThreadStopInfo::ShouldStop(Event *event_ptr) +{ + return false; +} + +bool +POSIXNewThreadStopInfo::ShouldNotify(Event *event_ptr) +{ + return false; +} diff --git a/source/Plugins/Process/FreeBSD/POSIXStopInfo.h b/source/Plugins/Process/FreeBSD/POSIXStopInfo.h new file mode 100644 index 0000000..a1ee2ea --- /dev/null +++ b/source/Plugins/Process/FreeBSD/POSIXStopInfo.h @@ -0,0 +1,110 @@ +//===-- POSIXStopInfo.h -----------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_POSIXStopInfo_H_ +#define liblldb_POSIXStopInfo_H_ + +// C Includes +// C++ Includes +// Other libraries and framework includes +// Project includes +#include "lldb/Target/StopInfo.h" + +#include "CrashReason.h" +#include "POSIXThread.h" + +#include <string> + +//===----------------------------------------------------------------------===// +/// @class POSIXStopInfo +/// @brief Simple base class for all POSIX-specific StopInfo objects. +/// +class POSIXStopInfo + : public lldb_private::StopInfo +{ +public: + POSIXStopInfo(lldb_private::Thread &thread, uint32_t status) + : StopInfo(thread, status) + { } +}; + +//===----------------------------------------------------------------------===// +/// @class POSIXLimboStopInfo +/// @brief Represents the stop state of a process ready to exit. +/// +class POSIXLimboStopInfo + : public POSIXStopInfo +{ +public: + POSIXLimboStopInfo(POSIXThread &thread) + : POSIXStopInfo(thread, 0) + { } + + ~POSIXLimboStopInfo(); + + lldb::StopReason + GetStopReason() const; + + const char * + GetDescription(); + + bool + ShouldStop(lldb_private::Event *event_ptr); + + bool + ShouldNotify(lldb_private::Event *event_ptr); +}; + + +//===----------------------------------------------------------------------===// +/// @class POSIXCrashStopInfo +/// @brief Represents the stop state of process that is ready to crash. +/// +class POSIXCrashStopInfo + : public POSIXStopInfo +{ +public: + POSIXCrashStopInfo(POSIXThread &thread, uint32_t status, + CrashReason reason, + lldb::addr_t fault_addr); + ~POSIXCrashStopInfo(); + + lldb::StopReason + GetStopReason() const; +}; + +//===----------------------------------------------------------------------===// +/// @class POSIXNewThreadStopInfo +/// @brief Represents the stop state of process when a new thread is spawned. +/// + +class POSIXNewThreadStopInfo + : public POSIXStopInfo +{ +public: + POSIXNewThreadStopInfo (POSIXThread &thread) + : POSIXStopInfo (thread, 0) + { } + + ~POSIXNewThreadStopInfo(); + + lldb::StopReason + GetStopReason() const; + + const char * + GetDescription(); + + bool + ShouldStop(lldb_private::Event *event_ptr); + + bool + ShouldNotify(lldb_private::Event *event_ptr); +}; + +#endif diff --git a/source/Plugins/Process/FreeBSD/POSIXThread.cpp b/source/Plugins/Process/FreeBSD/POSIXThread.cpp new file mode 100644 index 0000000..854796f --- /dev/null +++ b/source/Plugins/Process/FreeBSD/POSIXThread.cpp @@ -0,0 +1,661 @@ +//===-- POSIXThread.cpp -----------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// C Includes +#include <errno.h> + +// C++ Includes +// Other libraries and framework includes +// Project includes +#include "lldb/Breakpoint/Watchpoint.h" +#include "lldb/Breakpoint/BreakpointLocation.h" +#include "lldb/Core/Debugger.h" +#include "lldb/Core/State.h" +#include "lldb/Host/Host.h" +#include "lldb/Host/HostNativeThread.h" +#include "lldb/Host/HostInfo.h" +#include "lldb/Target/Process.h" +#include "lldb/Target/StopInfo.h" +#include "lldb/Target/Target.h" +#include "lldb/Target/ThreadSpec.h" +#include "llvm/ADT/SmallString.h" +#include "POSIXStopInfo.h" +#include "POSIXThread.h" +#include "ProcessPOSIX.h" +#include "ProcessPOSIXLog.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 "Plugins/Process/Utility/RegisterContextFreeBSD_arm.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/UnwindLLDB.h" + +using namespace lldb; +using namespace lldb_private; + + +POSIXThread::POSIXThread(Process &process, lldb::tid_t tid) + : Thread(process, tid), + m_frame_ap (), + m_breakpoint (), + m_thread_name_valid (false), + m_thread_name (), + m_posix_thread(NULL) +{ + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD)); + if (log && log->GetMask().Test(POSIX_LOG_VERBOSE)) + log->Printf ("POSIXThread::%s (tid = %" PRIi64 ")", __FUNCTION__, 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(); + } + } +} + +POSIXThread::~POSIXThread() +{ + DestroyThread(); +} + +ProcessMonitor & +POSIXThread::GetMonitor() +{ + ProcessSP base = GetProcess(); + ProcessPOSIX &process = static_cast<ProcessPOSIX&>(*base); + return process.GetMonitor(); +} + +void +POSIXThread::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 * +POSIXThread::GetInfo() +{ + return NULL; +} + +void +POSIXThread::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 * +POSIXThread::GetName () +{ + if (!m_thread_name_valid) + { + llvm::SmallString<32> thread_name; + HostNativeThread::GetName(GetID(), thread_name); + m_thread_name = thread_name.c_str(); + m_thread_name_valid = true; + } + + if (m_thread_name.empty()) + return NULL; + return m_thread_name.c_str(); +} + +lldb::RegisterContextSP +POSIXThread::GetRegisterContext() +{ + if (!m_reg_context_sp) + { + m_posix_thread = NULL; + + RegisterInfoInterface *reg_interface = NULL; + const ArchSpec &target_arch = GetProcess()->GetTarget().GetArchitecture(); + + switch (target_arch.GetTriple().getOS()) + { + case llvm::Triple::FreeBSD: + switch (target_arch.GetMachine()) + { + case llvm::Triple::arm: + reg_interface = new RegisterContextFreeBSD_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: + break; + } + break; + + default: + break; + } + + assert(reg_interface && "OS or 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 +POSIXThread::CreateRegisterContextForFrame(lldb_private::StackFrame *frame) +{ + lldb::RegisterContextSP reg_ctx_sp; + uint32_t concrete_frame_idx = 0; + + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD)); + if (log && log->GetMask().Test(POSIX_LOG_VERBOSE)) + log->Printf ("POSIXThread::%s ()", __FUNCTION__); + + 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 +POSIXThread::GetThreadPointer () +{ + ProcessMonitor &monitor = GetMonitor(); + addr_t addr; + if (monitor.ReadThreadPointer (GetID(), addr)) + return addr; + else + return LLDB_INVALID_ADDRESS; +} + +bool +POSIXThread::CalculateStopInfo() +{ + SetStopInfo (m_stop_info_sp); + return true; +} + +Unwind * +POSIXThread::GetUnwinder() +{ + if (m_unwinder_ap.get() == NULL) + m_unwinder_ap.reset(new UnwindLLDB(*this)); + + return m_unwinder_ap.get(); +} + +void +POSIXThread::DidStop() +{ + // Don't set the thread state to stopped unless we really stopped. +} + +bool +POSIXThread::Resume() +{ + lldb::StateType resume_state = GetResumeState(); + ProcessMonitor &monitor = GetMonitor(); + bool status; + + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD)); + if (log) + log->Printf ("POSIXThread::%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 +POSIXThread::Notify(const ProcessMessage &message) +{ + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD)); + if (log) + log->Printf ("POSIXThread::%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::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::eCrashMessage: + CrashNotify(message); + break; + + case ProcessMessage::eNewThreadMessage: + ThreadNotify(message); + break; + + case ProcessMessage::eExecMessage: + ExecNotify(message); + break; + } +} + +bool +POSIXThread::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 +POSIXThread::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 +POSIXThread::NumSupportedHardwareWatchpoints() +{ + lldb::RegisterContextSP reg_ctx_sp = GetRegisterContext(); + if (reg_ctx_sp.get()) + return reg_ctx_sp->NumSupportedHardwareWatchpoints(); + return 0; +} + +uint32_t +POSIXThread::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 +POSIXThread::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(); + if (log) + log->Printf ("POSIXThread::%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 () != NULL) + SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID(*this, bp_id)); + else + { + const bool should_stop = false; + SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID(*this, bp_id, should_stop)); + } + } + else + SetStopInfo(StopInfoSP()); +} + +void +POSIXThread::WatchNotify(const ProcessMessage &message) +{ + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD)); + + lldb::addr_t halt_addr = message.GetHWAddress(); + if (log) + log->Printf ("POSIXThread::%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 +POSIXThread::TraceNotify(const ProcessMessage &message) +{ + 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 +POSIXThread::LimboNotify(const ProcessMessage &message) +{ + SetStopInfo (lldb::StopInfoSP(new POSIXLimboStopInfo(*this))); +} + +void +POSIXThread::SignalNotify(const ProcessMessage &message) +{ + int signo = message.GetSignal(); + SetStopInfo (StopInfo::CreateStopReasonWithSignal(*this, signo)); +} + +void +POSIXThread::SignalDeliveredNotify(const ProcessMessage &message) +{ + int signo = message.GetSignal(); + SetStopInfo (StopInfo::CreateStopReasonWithSignal(*this, signo)); +} + +void +POSIXThread::CrashNotify(const ProcessMessage &message) +{ + // FIXME: Update stop reason as per bugzilla 14598 + int signo = message.GetSignal(); + + assert(message.GetKind() == ProcessMessage::eCrashMessage); + + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD)); + if (log) + log->Printf ("POSIXThread::%s () signo = %i, reason = '%s'", + __FUNCTION__, signo, message.PrintCrashReason()); + + SetStopInfo (lldb::StopInfoSP(new POSIXCrashStopInfo(*this, signo, + message.GetCrashReason(), + message.GetFaultAddress()))); +} + +void +POSIXThread::ThreadNotify(const ProcessMessage &message) +{ + SetStopInfo (lldb::StopInfoSP(new POSIXNewThreadStopInfo(*this))); +} + +unsigned +POSIXThread::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 +POSIXThread::ExecNotify(const ProcessMessage &message) +{ + SetStopInfo (StopInfo::CreateStopReasonWithExec(*this)); +} + +const char * +POSIXThread::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 * +POSIXThread::GetRegisterNameFromOffset(unsigned offset) +{ + return GetRegisterName(GetRegisterIndexFromOffset(offset)); +} + diff --git a/source/Plugins/Process/FreeBSD/POSIXThread.h b/source/Plugins/Process/FreeBSD/POSIXThread.h new file mode 100644 index 0000000..c38d194 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/POSIXThread.h @@ -0,0 +1,132 @@ +//===-- POSIXThread.h -------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_POSIXThread_H_ +#define liblldb_POSIXThread_H_ + +// C Includes +// C++ Includes +#include <memory> +#include <string> + +// Other libraries and framework includes +#include "lldb/Target/Thread.h" +#include "Plugins/Process/Utility/RegisterContextPOSIX.h" + +class ProcessMessage; +class ProcessMonitor; +class POSIXBreakpointProtocol; + +//------------------------------------------------------------------------------ +// @class POSIXThread +// @brief Abstraction of a POSIX thread. +class POSIXThread + : public lldb_private::Thread +{ +public: + POSIXThread(lldb_private::Process &process, lldb::tid_t tid); + + virtual ~POSIXThread(); + + void + RefreshStateAfterStop() override; + + // This notifies the thread when a private stop occurs. + void + DidStop () override; + + const char * + GetInfo() override; + + void + SetName (const char *name) override; + + const char * + GetName () override; + + lldb::RegisterContextSP + GetRegisterContext() override; + + lldb::RegisterContextSP + CreateRegisterContextForFrame (lldb_private::StackFrame *frame) override; + + lldb::addr_t + GetThreadPointer () override; + + //-------------------------------------------------------------------------- + // These functions provide a mapping from the register offset + // back to the register index or name for use in debugging or log + // output. + + unsigned + GetRegisterIndexFromOffset(unsigned offset); + + const char * + GetRegisterName(unsigned reg); + + const char * + GetRegisterNameFromOffset(unsigned offset); + + //-------------------------------------------------------------------------- + // These methods form a specialized interface to POSIX threads. + // + bool Resume(); + + void Notify(const ProcessMessage &message); + + //-------------------------------------------------------------------------- + // These methods provide an interface to watchpoints + // + bool EnableHardwareWatchpoint(lldb_private::Watchpoint *wp); + + bool DisableHardwareWatchpoint(lldb_private::Watchpoint *wp); + + uint32_t NumSupportedHardwareWatchpoints(); + + uint32_t FindVacantWatchpointIndex(); + +protected: + POSIXBreakpointProtocol * + GetPOSIXBreakpointProtocol () + { + if (!m_reg_context_sp) + m_reg_context_sp = GetRegisterContext(); + return m_posix_thread; + } + + std::unique_ptr<lldb_private::StackFrame> m_frame_ap; + + lldb::BreakpointSiteSP m_breakpoint; + + bool m_thread_name_valid; + std::string m_thread_name; + POSIXBreakpointProtocol *m_posix_thread; + + ProcessMonitor & + GetMonitor(); + + bool + CalculateStopInfo() override; + + void BreakNotify(const ProcessMessage &message); + void WatchNotify(const ProcessMessage &message); + virtual void TraceNotify(const ProcessMessage &message); + void LimboNotify(const ProcessMessage &message); + void SignalNotify(const ProcessMessage &message); + void SignalDeliveredNotify(const ProcessMessage &message); + void CrashNotify(const ProcessMessage &message); + void ThreadNotify(const ProcessMessage &message); + void ExitNotify(const ProcessMessage &message); + void ExecNotify(const ProcessMessage &message); + + lldb_private::Unwind * + GetUnwinder() override; +}; + +#endif // #ifndef liblldb_POSIXThread_H_ diff --git a/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp b/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp index 5a0b5ed..a0458f1 100644 --- a/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp +++ b/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp @@ -11,6 +11,8 @@ #include <errno.h> // C++ Includes +#include <mutex> + // Other libraries and framework includes #include "lldb/Core/PluginManager.h" #include "lldb/Core/State.h" @@ -56,23 +58,14 @@ ProcessFreeBSD::CreateInstance(Target& target, void ProcessFreeBSD::Initialize() { - static bool g_initialized = false; + static std::once_flag g_once_flag; - if (!g_initialized) - { + std::call_once(g_once_flag, []() { PluginManager::RegisterPlugin(GetPluginNameStatic(), GetPluginDescriptionStatic(), CreateInstance); - Log::Callbacks log_callbacks = { - ProcessPOSIXLog::DisableLog, - ProcessPOSIXLog::EnableLog, - ProcessPOSIXLog::ListLogCategories - }; - - Log::RegisterLogChannel (ProcessFreeBSD::GetPluginNameStatic(), log_callbacks); - ProcessPOSIXLog::RegisterPluginName(GetPluginNameStatic()); - g_initialized = true; - } + ProcessPOSIXLog::Initialize(GetPluginNameStatic()); + }); } lldb_private::ConstString diff --git a/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp b/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp index b33f833..28bca09 100644 --- a/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp +++ b/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp @@ -28,6 +28,7 @@ #include "lldb/Host/ThreadLauncher.h" #include "lldb/Target/Thread.h" #include "lldb/Target/RegisterContext.h" +#include "lldb/Target/UnixSignals.h" #include "lldb/Utility/PseudoTerminal.h" #include "Plugins/Process/POSIX/CrashReason.h" @@ -107,13 +108,9 @@ PtraceWrapper(int req, lldb::pid_t pid, void *addr, int data, if (req == PT_GETREGS) { struct reg *r = (struct reg *) addr; - log->Printf("PT_GETREGS: ip=0x%lx", r->r_rip); - log->Printf("PT_GETREGS: sp=0x%lx", r->r_rsp); - log->Printf("PT_GETREGS: bp=0x%lx", r->r_rbp); - log->Printf("PT_GETREGS: ax=0x%lx", r->r_rax); + log->Printf("PT_GETREGS: rip=0x%lx rsp=0x%lx rbp=0x%lx rax=0x%lx", + r->r_rip, r->r_rsp, r->r_rbp, r->r_rax); } -#endif -#ifndef __powerpc__ if (req == PT_GETDBREGS || req == PT_SETDBREGS) { struct dbreg *r = (struct dbreg *) addr; char setget = (req == PT_GETDBREGS) ? 'G' : 'S'; @@ -772,17 +769,17 @@ ProcessMonitor::LaunchArgs::LaunchArgs(ProcessMonitor *monitor, lldb_private::Module *module, char const **argv, char const **envp, - const char *stdin_path, - const char *stdout_path, - const char *stderr_path, - const char *working_dir) + const FileSpec &stdin_file_spec, + const FileSpec &stdout_file_spec, + const FileSpec &stderr_file_spec, + const FileSpec &working_dir) : OperationArgs(monitor), m_module(module), m_argv(argv), m_envp(envp), - m_stdin_path(stdin_path), - m_stdout_path(stdout_path), - m_stderr_path(stderr_path), + m_stdin_file_spec(stdin_file_spec), + m_stdout_file_spec(stdout_file_spec), + m_stderr_file_spec(stderr_file_spec), m_working_dir(working_dir) { } ProcessMonitor::LaunchArgs::~LaunchArgs() @@ -811,10 +808,10 @@ ProcessMonitor::ProcessMonitor(ProcessPOSIX *process, Module *module, const char *argv[], const char *envp[], - const char *stdin_path, - const char *stdout_path, - const char *stderr_path, - const char *working_dir, + const FileSpec &stdin_file_spec, + const FileSpec &stdout_file_spec, + const FileSpec &stderr_file_spec, + const FileSpec &working_dir, const lldb_private::ProcessLaunchInfo & /* launch_info */, lldb_private::Error &error) : m_process(static_cast<ProcessFreeBSD *>(process)), @@ -823,8 +820,10 @@ ProcessMonitor::ProcessMonitor(ProcessPOSIX *process, m_operation(0) { std::unique_ptr<LaunchArgs> args(new LaunchArgs(this, module, argv, envp, - stdin_path, stdout_path, stderr_path, - working_dir)); + stdin_file_spec, + stdout_file_spec, + stderr_file_spec, + working_dir)); sem_init(&m_operation_pending, 0, 0); @@ -955,15 +954,15 @@ ProcessMonitor::Launch(LaunchArgs *args) ProcessFreeBSD &process = monitor->GetProcess(); const char **argv = args->m_argv; const char **envp = args->m_envp; - const char *stdin_path = args->m_stdin_path; - const char *stdout_path = args->m_stdout_path; - const char *stderr_path = args->m_stderr_path; - const char *working_dir = args->m_working_dir; + const FileSpec &stdin_file_spec = args->m_stdin_file_spec; + const FileSpec &stdout_file_spec = args->m_stdout_file_spec; + const FileSpec &stderr_file_spec = args->m_stderr_file_spec; + const FileSpec &working_dir = args->m_working_dir; lldb_utility::PseudoTerminal terminal; const size_t err_len = 1024; char err_str[err_len]; - lldb::pid_t pid; + ::pid_t pid; // Propagate the environment if one is not supplied. if (envp == NULL || envp[0] == NULL) @@ -1010,22 +1009,21 @@ ProcessMonitor::Launch(LaunchArgs *args) // // FIXME: If two or more of the paths are the same we needlessly open // the same file multiple times. - if (stdin_path != NULL && stdin_path[0]) - if (!DupDescriptor(stdin_path, STDIN_FILENO, O_RDONLY)) + if (stdin_file_spec) + if (!DupDescriptor(stdin_file_spec, STDIN_FILENO, O_RDONLY)) exit(eDupStdinFailed); - if (stdout_path != NULL && stdout_path[0]) - if (!DupDescriptor(stdout_path, STDOUT_FILENO, O_WRONLY | O_CREAT)) + if (stdout_file_spec) + if (!DupDescriptor(stdout_file_spec, STDOUT_FILENO, O_WRONLY | O_CREAT)) exit(eDupStdoutFailed); - if (stderr_path != NULL && stderr_path[0]) - if (!DupDescriptor(stderr_path, STDERR_FILENO, O_WRONLY | O_CREAT)) + if (stderr_file_spec) + if (!DupDescriptor(stderr_file_spec, STDERR_FILENO, O_WRONLY | O_CREAT)) exit(eDupStderrFailed); // Change working directory - if (working_dir != NULL && working_dir[0]) - if (0 != ::chdir(working_dir)) - exit(eChdirFailed); + if (working_dir && 0 != ::chdir(working_dir.GetCString())) + exit(eChdirFailed); // Execute. We should never return. execve(argv[0], @@ -1556,9 +1554,9 @@ ProcessMonitor::Detach(lldb::tid_t tid) } bool -ProcessMonitor::DupDescriptor(const char *path, int fd, int flags) +ProcessMonitor::DupDescriptor(const FileSpec &file_spec, int fd, int flags) { - int target_fd = open(path, flags, 0666); + int target_fd = open(file_spec.GetCString(), flags, 0666); if (target_fd == -1) return false; diff --git a/source/Plugins/Process/FreeBSD/ProcessMonitor.h b/source/Plugins/Process/FreeBSD/ProcessMonitor.h index 4ae963c..20ce582 100644 --- a/source/Plugins/Process/FreeBSD/ProcessMonitor.h +++ b/source/Plugins/Process/FreeBSD/ProcessMonitor.h @@ -17,6 +17,7 @@ // C++ Includes // Other libraries and framework includes #include "lldb/lldb-types.h" +#include "lldb/Host/FileSpec.h" #include "lldb/Host/HostThread.h" #include "lldb/Host/Mutex.h" @@ -52,10 +53,10 @@ public: lldb_private::Module *module, char const *argv[], char const *envp[], - const char *stdin_path, - const char *stdout_path, - const char *stderr_path, - const char *working_dir, + const lldb_private::FileSpec &stdin_file_spec, + const lldb_private::FileSpec &stdout_file_spec, + const lldb_private::FileSpec &stderr_file_spec, + const lldb_private::FileSpec &working_dir, const lldb_private::ProcessLaunchInfo &launch_info, lldb_private::Error &error); @@ -228,7 +229,7 @@ private: // the operation is complete. sem_t m_operation_pending; sem_t m_operation_done; - + struct OperationArgs { OperationArgs(ProcessMonitor *monitor); @@ -250,20 +251,20 @@ private: lldb_private::Module *module, char const **argv, char const **envp, - const char *stdin_path, - const char *stdout_path, - const char *stderr_path, - const char *working_dir); + const lldb_private::FileSpec &stdin_file_spec, + const lldb_private::FileSpec &stdout_file_spec, + const lldb_private::FileSpec &stderr_file_spec, + const lldb_private::FileSpec &working_dir); ~LaunchArgs(); - lldb_private::Module *m_module; // The executable image to launch. - char const **m_argv; // Process arguments. - char const **m_envp; // Process environment. - const char *m_stdin_path; // Redirect stdin or NULL. - const char *m_stdout_path; // Redirect stdout or NULL. - const char *m_stderr_path; // Redirect stderr or NULL. - const char *m_working_dir; // Working directory or NULL. + lldb_private::Module *m_module; // The executable image to launch. + char const **m_argv; // Process arguments. + char const **m_envp; // Process environment. + const lldb_private::FileSpec m_stdin_file_spec; // Redirect stdin or empty. + const lldb_private::FileSpec m_stdout_file_spec; // Redirect stdout or empty. + const lldb_private::FileSpec m_stderr_file_spec; // Redirect stderr or empty. + const lldb_private::FileSpec m_working_dir; // Working directory or empty. }; void @@ -298,7 +299,7 @@ private: ServeOperation(OperationArgs *args); static bool - DupDescriptor(const char *path, int fd, int flags); + DupDescriptor(const lldb_private::FileSpec &file_spec, int fd, int flags); static bool MonitorCallback(void *callback_baton, diff --git a/source/Plugins/Process/FreeBSD/ProcessPOSIX.cpp b/source/Plugins/Process/FreeBSD/ProcessPOSIX.cpp new file mode 100644 index 0000000..360382e --- /dev/null +++ b/source/Plugins/Process/FreeBSD/ProcessPOSIX.cpp @@ -0,0 +1,939 @@ +//===-- ProcessPOSIX.cpp ----------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// C Includes +#include <errno.h> + +// C++ Includes +// Other libraries and framework includes +#include "lldb/Breakpoint/BreakpointLocation.h" +#include "lldb/Breakpoint/Watchpoint.h" +#include "lldb/Core/Module.h" +#include "lldb/Core/ModuleSpec.h" +#include "lldb/Core/PluginManager.h" +#include "lldb/Core/State.h" +#include "lldb/Host/FileSpec.h" +#include "lldb/Host/Host.h" +#include "lldb/Symbol/ObjectFile.h" +#include "lldb/Target/DynamicLoader.h" +#include "lldb/Target/Platform.h" +#include "lldb/Target/Target.h" + +#include "ProcessPOSIX.h" +#include "ProcessPOSIXLog.h" +#include "Plugins/Process/Utility/InferiorCallPOSIX.h" +#include "POSIXThread.h" +#include "ProcessMonitor.h" + +#include "lldb/Host/posix/Fcntl.h" + +using namespace lldb; +using namespace lldb_private; + +//------------------------------------------------------------------------------ +// Constructors and destructors. + +ProcessPOSIX::ProcessPOSIX(Target& target, Listener &listener, UnixSignalsSP &unix_signals_sp) + : Process(target, listener, unix_signals_sp), + m_byte_order(lldb::endian::InlHostByteOrder()), + m_monitor(NULL), + m_module(NULL), + m_message_mutex (Mutex::eMutexTypeRecursive), + m_exit_now(false), + m_seen_initial_stop() +{ + // FIXME: Putting this code in the ctor and saving the byte order in a + // member variable is a hack to avoid const qual issues in GetByteOrder. + lldb::ModuleSP module = GetTarget().GetExecutableModule(); + if (module && module->GetObjectFile()) + m_byte_order = module->GetObjectFile()->GetByteOrder(); +} + +ProcessPOSIX::~ProcessPOSIX() +{ + delete m_monitor; +} + +//------------------------------------------------------------------------------ +// Process protocol. +void +ProcessPOSIX::Finalize() +{ + Process::Finalize(); + + if (m_monitor) + m_monitor->StopMonitor(); +} + +bool +ProcessPOSIX::CanDebug(Target &target, bool plugin_specified_by_name) +{ + // For now we are just making sure the file exists for a given module + ModuleSP exe_module_sp(target.GetExecutableModule()); + if (exe_module_sp.get()) + return exe_module_sp->GetFileSpec().Exists(); + // If there is no executable module, we return true since we might be preparing to attach. + return true; +} + +Error +ProcessPOSIX::DoAttachToProcessWithID (lldb::pid_t pid, const ProcessAttachInfo &attach_info) +{ + Error error; + assert(m_monitor == NULL); + + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PROCESS)); + if (log && log->GetMask().Test(POSIX_LOG_VERBOSE)) + log->Printf ("ProcessPOSIX::%s(pid = %" PRIi64 ")", __FUNCTION__, GetID()); + + m_monitor = new ProcessMonitor(this, pid, error); + + if (!error.Success()) + return error; + + PlatformSP platform_sp (m_target.GetPlatform ()); + assert (platform_sp.get()); + if (!platform_sp) + return error; // FIXME: Detatch? + + // Find out what we can about this process + ProcessInstanceInfo process_info; + platform_sp->GetProcessInfo (pid, process_info); + + // Resolve the executable module + ModuleSP exe_module_sp; + FileSpecList executable_search_paths (Target::GetDefaultExecutableSearchPaths()); + ModuleSpec exe_module_spec(process_info.GetExecutableFile(), m_target.GetArchitecture()); + error = platform_sp->ResolveExecutable(exe_module_spec, + exe_module_sp, + executable_search_paths.GetSize() ? &executable_search_paths : NULL); + if (!error.Success()) + return error; + + // Fix the target architecture if necessary + const ArchSpec &module_arch = exe_module_sp->GetArchitecture(); + if (module_arch.IsValid() && !m_target.GetArchitecture().IsExactMatch(module_arch)) + m_target.SetArchitecture(module_arch); + + // Initialize the target module list + m_target.SetExecutableModule (exe_module_sp, true); + + SetSTDIOFileDescriptor(m_monitor->GetTerminalFD()); + + SetID(pid); + + return error; +} + +Error +ProcessPOSIX::WillLaunch(Module* module) +{ + Error error; + return error; +} + +FileSpec +ProcessPOSIX::GetFileSpec(const lldb_private::FileAction *file_action, + const FileSpec &default_file_spec, + const FileSpec &dbg_pts_file_spec) +{ + FileSpec file_spec{}; + + if (file_action && file_action->GetAction() == FileAction::eFileActionOpen) + { + file_spec = file_action->GetFileSpec(); + // By default the stdio paths passed in will be pseudo-terminal + // (/dev/pts). If so, convert to using a different default path + // instead to redirect I/O to the debugger console. This should + // also handle user overrides to /dev/null or a different file. + if (!file_spec || file_spec == dbg_pts_file_spec) + file_spec = default_file_spec; + } + return file_spec; +} + +Error +ProcessPOSIX::DoLaunch (Module *module, + ProcessLaunchInfo &launch_info) +{ + Error error; + assert(m_monitor == NULL); + + FileSpec working_dir = launch_info.GetWorkingDirectory(); + if (working_dir && + (!working_dir.ResolvePath() || + working_dir.GetFileType() != FileSpec::eFileTypeDirectory)) + { + error.SetErrorStringWithFormat("No such file or directory: %s", + working_dir.GetCString()); + return error; + } + + SetPrivateState(eStateLaunching); + + const lldb_private::FileAction *file_action; + + // Default of empty will mean to use existing open file descriptors + FileSpec stdin_file_spec{}; + FileSpec stdout_file_spec{}; + FileSpec stderr_file_spec{}; + + const FileSpec dbg_pts_file_spec{launch_info.GetPTY().GetSlaveName(NULL,0), false}; + + file_action = launch_info.GetFileActionForFD (STDIN_FILENO); + stdin_file_spec = GetFileSpec(file_action, stdin_file_spec, dbg_pts_file_spec); + + file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); + stdout_file_spec = GetFileSpec(file_action, stdout_file_spec, dbg_pts_file_spec); + + file_action = launch_info.GetFileActionForFD (STDERR_FILENO); + stderr_file_spec = GetFileSpec(file_action, stderr_file_spec, dbg_pts_file_spec); + + m_monitor = new ProcessMonitor(this, + module, + launch_info.GetArguments().GetConstArgumentVector(), + launch_info.GetEnvironmentEntries().GetConstArgumentVector(), + stdin_file_spec, + stdout_file_spec, + stderr_file_spec, + working_dir, + launch_info, + error); + + m_module = module; + + if (!error.Success()) + return error; + + int terminal = m_monitor->GetTerminalFD(); + if (terminal >= 0) { + // The reader thread will close the file descriptor when done, so we pass it a copy. + int stdio = fcntl(terminal, F_DUPFD_CLOEXEC, 0); + if (stdio == -1) { + error.SetErrorToErrno(); + return error; + } + SetSTDIOFileDescriptor(stdio); + } + + SetID(m_monitor->GetPID()); + return error; +} + +void +ProcessPOSIX::DidLaunch() +{ +} + +Error +ProcessPOSIX::DoResume() +{ + StateType state = GetPrivateState(); + + assert(state == eStateStopped); + + SetPrivateState(eStateRunning); + + bool did_resume = false; + + Mutex::Locker lock(m_thread_list.GetMutex()); + + uint32_t thread_count = m_thread_list.GetSize(false); + for (uint32_t i = 0; i < thread_count; ++i) + { + POSIXThread *thread = static_cast<POSIXThread*>( + m_thread_list.GetThreadAtIndex(i, false).get()); + did_resume = thread->Resume() || did_resume; + } + assert(did_resume && "Process resume failed!"); + + return Error(); +} + +addr_t +ProcessPOSIX::GetImageInfoAddress() +{ + Target *target = &GetTarget(); + ObjectFile *obj_file = target->GetExecutableModule()->GetObjectFile(); + Address addr = obj_file->GetImageInfoAddress(target); + + if (addr.IsValid()) + return addr.GetLoadAddress(target); + return LLDB_INVALID_ADDRESS; +} + +Error +ProcessPOSIX::DoHalt(bool &caused_stop) +{ + Error error; + + if (IsStopped()) + { + caused_stop = false; + } + else if (kill(GetID(), SIGSTOP)) + { + caused_stop = false; + error.SetErrorToErrno(); + } + else + { + caused_stop = true; + } + return error; +} + +Error +ProcessPOSIX::DoSignal(int signal) +{ + Error error; + + if (kill(GetID(), signal)) + error.SetErrorToErrno(); + + return error; +} + +Error +ProcessPOSIX::DoDestroy() +{ + Error error; + + if (!HasExited()) + { + assert(m_monitor); + m_exit_now = true; + if (GetID() == LLDB_INVALID_PROCESS_ID) + { + error.SetErrorString("invalid process id"); + return error; + } + if (!m_monitor->Kill()) + { + error.SetErrorToErrno(); + return error; + } + + SetPrivateState(eStateExited); + } + + return error; +} + +void +ProcessPOSIX::DoDidExec() +{ + Target *target = &GetTarget(); + if (target) + { + PlatformSP platform_sp (target->GetPlatform()); + assert (platform_sp.get()); + if (platform_sp) + { + ProcessInstanceInfo process_info; + platform_sp->GetProcessInfo(GetID(), process_info); + ModuleSP exe_module_sp; + ModuleSpec exe_module_spec(process_info.GetExecutableFile(), target->GetArchitecture()); + FileSpecList executable_search_paths (Target::GetDefaultExecutableSearchPaths()); + Error error = platform_sp->ResolveExecutable(exe_module_spec, + exe_module_sp, + executable_search_paths.GetSize() ? &executable_search_paths : NULL); + if (!error.Success()) + return; + target->SetExecutableModule(exe_module_sp, true); + } + } +} + +void +ProcessPOSIX::SendMessage(const ProcessMessage &message) +{ + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PROCESS)); + + Mutex::Locker lock(m_message_mutex); + + Mutex::Locker thread_lock(m_thread_list.GetMutex()); + + POSIXThread *thread = static_cast<POSIXThread*>( + m_thread_list.FindThreadByID(message.GetTID(), false).get()); + + switch (message.GetKind()) + { + case ProcessMessage::eInvalidMessage: + return; + + case ProcessMessage::eAttachMessage: + SetPrivateState(eStateStopped); + return; + + case ProcessMessage::eLimboMessage: + assert(thread); + thread->SetState(eStateStopped); + if (message.GetTID() == GetID()) + { + m_exit_status = message.GetExitStatus(); + if (m_exit_now) + { + SetPrivateState(eStateExited); + m_monitor->Detach(GetID()); + } + else + { + SetPrivateState(eStateStopped); + } + } + else + { + SetPrivateState(eStateStopped); + } + break; + + case ProcessMessage::eExitMessage: + if (thread != nullptr) + thread->SetState(eStateExited); + else + { + if (log) + log->Warning ("ProcessPOSIX::%s eExitMessage for TID %" PRIu64 " failed to find a thread to mark as eStateExited, ignoring", __FUNCTION__, message.GetTID ()); + } + + // FIXME: I'm not sure we need to do this. + if (message.GetTID() == GetID()) + { + SetExitStatus(message.GetExitStatus(), NULL); + } + else if (!IsAThreadRunning()) + SetPrivateState(eStateStopped); + break; + + case ProcessMessage::eSignalMessage: + case ProcessMessage::eSignalDeliveredMessage: + if (message.GetSignal() == SIGSTOP && + AddThreadForInitialStopIfNeeded(message.GetTID())) + return; + // Intentional fall-through + + case ProcessMessage::eBreakpointMessage: + case ProcessMessage::eTraceMessage: + case ProcessMessage::eWatchpointMessage: + case ProcessMessage::eCrashMessage: + assert(thread); + thread->SetState(eStateStopped); + SetPrivateState(eStateStopped); + break; + + case ProcessMessage::eNewThreadMessage: + { + lldb::tid_t new_tid = message.GetChildTID(); + if (WaitingForInitialStop(new_tid)) + { + m_monitor->WaitForInitialTIDStop(new_tid); + } + assert(thread); + thread->SetState(eStateStopped); + SetPrivateState(eStateStopped); + break; + } + + case ProcessMessage::eExecMessage: + { + assert(thread); + thread->SetState(eStateStopped); + SetPrivateState(eStateStopped); + break; + } + } + + + m_message_queue.push(message); +} + +bool +ProcessPOSIX::AddThreadForInitialStopIfNeeded(lldb::tid_t stop_tid) +{ + bool added_to_set = false; + ThreadStopSet::iterator it = m_seen_initial_stop.find(stop_tid); + if (it == m_seen_initial_stop.end()) + { + m_seen_initial_stop.insert(stop_tid); + added_to_set = true; + } + return added_to_set; +} + +bool +ProcessPOSIX::WaitingForInitialStop(lldb::tid_t stop_tid) +{ + return (m_seen_initial_stop.find(stop_tid) == m_seen_initial_stop.end()); +} + +POSIXThread * +ProcessPOSIX::CreateNewPOSIXThread(lldb_private::Process &process, lldb::tid_t tid) +{ + return new POSIXThread(process, tid); +} + +void +ProcessPOSIX::RefreshStateAfterStop() +{ + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PROCESS)); + if (log && log->GetMask().Test(POSIX_LOG_VERBOSE)) + log->Printf ("ProcessPOSIX::%s(), message_queue size = %d", __FUNCTION__, (int)m_message_queue.size()); + + Mutex::Locker lock(m_message_mutex); + + // This method used to only handle one message. Changing it to loop allows + // it to handle the case where we hit a breakpoint while handling a different + // breakpoint. + while (!m_message_queue.empty()) + { + ProcessMessage &message = m_message_queue.front(); + + // Resolve the thread this message corresponds to and pass it along. + lldb::tid_t tid = message.GetTID(); + if (log) + log->Printf ("ProcessPOSIX::%s(), message_queue size = %d, pid = %" PRIi64, __FUNCTION__, (int)m_message_queue.size(), tid); + + if (message.GetKind() == ProcessMessage::eNewThreadMessage) + { + if (log) + log->Printf ("ProcessPOSIX::%s() adding thread, tid = %" PRIi64, __FUNCTION__, message.GetChildTID()); + lldb::tid_t child_tid = message.GetChildTID(); + ThreadSP thread_sp; + thread_sp.reset(CreateNewPOSIXThread(*this, child_tid)); + + Mutex::Locker lock(m_thread_list.GetMutex()); + + m_thread_list.AddThread(thread_sp); + } + + m_thread_list.RefreshStateAfterStop(); + + POSIXThread *thread = static_cast<POSIXThread*>( + GetThreadList().FindThreadByID(tid, false).get()); + if (thread) + thread->Notify(message); + + if (message.GetKind() == ProcessMessage::eExitMessage) + { + // FIXME: We should tell the user about this, but the limbo message is probably better for that. + if (log) + log->Printf ("ProcessPOSIX::%s() removing thread, tid = %" PRIi64, __FUNCTION__, tid); + + Mutex::Locker lock(m_thread_list.GetMutex()); + + ThreadSP thread_sp = m_thread_list.RemoveThreadByID(tid, false); + thread_sp.reset(); + m_seen_initial_stop.erase(tid); + } + + m_message_queue.pop(); + } +} + +bool +ProcessPOSIX::IsAlive() +{ + StateType state = GetPrivateState(); + return state != eStateDetached + && state != eStateExited + && state != eStateInvalid + && state != eStateUnloaded; +} + +size_t +ProcessPOSIX::DoReadMemory(addr_t vm_addr, + void *buf, size_t size, Error &error) +{ + assert(m_monitor); + return m_monitor->ReadMemory(vm_addr, buf, size, error); +} + +size_t +ProcessPOSIX::DoWriteMemory(addr_t vm_addr, const void *buf, size_t size, + Error &error) +{ + assert(m_monitor); + return m_monitor->WriteMemory(vm_addr, buf, size, error); +} + +addr_t +ProcessPOSIX::DoAllocateMemory(size_t size, uint32_t permissions, + Error &error) +{ + addr_t allocated_addr = LLDB_INVALID_ADDRESS; + + unsigned prot = 0; + if (permissions & lldb::ePermissionsReadable) + prot |= eMmapProtRead; + if (permissions & lldb::ePermissionsWritable) + prot |= eMmapProtWrite; + if (permissions & lldb::ePermissionsExecutable) + prot |= eMmapProtExec; + + if (InferiorCallMmap(this, allocated_addr, 0, size, prot, + eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) { + m_addr_to_mmap_size[allocated_addr] = size; + error.Clear(); + } else { + allocated_addr = LLDB_INVALID_ADDRESS; + error.SetErrorStringWithFormat("unable to allocate %zu bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions)); + } + + return allocated_addr; +} + +Error +ProcessPOSIX::DoDeallocateMemory(lldb::addr_t addr) +{ + Error error; + MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); + if (pos != m_addr_to_mmap_size.end() && + InferiorCallMunmap(this, addr, pos->second)) + m_addr_to_mmap_size.erase (pos); + else + error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); + + return error; +} + +size_t +ProcessPOSIX::GetSoftwareBreakpointTrapOpcode(BreakpointSite* bp_site) +{ + static const uint8_t g_aarch64_opcode[] = { 0x00, 0x00, 0x20, 0xD4 }; + static const uint8_t g_i386_opcode[] = { 0xCC }; + + ArchSpec arch = GetTarget().GetArchitecture(); + const uint8_t *opcode = NULL; + size_t opcode_size = 0; + + switch (arch.GetMachine()) + { + default: + assert(false && "CPU type not supported!"); + break; + + case llvm::Triple::arm: + { + // The ARM reference recommends the use of 0xe7fddefe and 0xdefe + // but the linux kernel does otherwise. + static const uint8_t g_arm_breakpoint_opcode[] = { 0xf0, 0x01, 0xf0, 0xe7 }; + static const uint8_t g_thumb_breakpoint_opcode[] = { 0x01, 0xde }; + + lldb::BreakpointLocationSP bp_loc_sp (bp_site->GetOwnerAtIndex (0)); + AddressClass addr_class = eAddressClassUnknown; + + if (bp_loc_sp) + addr_class = bp_loc_sp->GetAddress ().GetAddressClass (); + + if (addr_class == eAddressClassCodeAlternateISA + || (addr_class == eAddressClassUnknown + && bp_loc_sp->GetAddress().GetOffset() & 1)) + { + opcode = g_thumb_breakpoint_opcode; + opcode_size = sizeof(g_thumb_breakpoint_opcode); + } + else + { + opcode = g_arm_breakpoint_opcode; + opcode_size = sizeof(g_arm_breakpoint_opcode); + } + } + break; + case llvm::Triple::aarch64: + opcode = g_aarch64_opcode; + opcode_size = sizeof(g_aarch64_opcode); + break; + + case llvm::Triple::x86: + case llvm::Triple::x86_64: + opcode = g_i386_opcode; + opcode_size = sizeof(g_i386_opcode); + break; + } + + bp_site->SetTrapOpcode(opcode, opcode_size); + return opcode_size; +} + +Error +ProcessPOSIX::EnableBreakpointSite(BreakpointSite *bp_site) +{ + return EnableSoftwareBreakpoint(bp_site); +} + +Error +ProcessPOSIX::DisableBreakpointSite(BreakpointSite *bp_site) +{ + return DisableSoftwareBreakpoint(bp_site); +} + +Error +ProcessPOSIX::EnableWatchpoint(Watchpoint *wp, bool notify) +{ + Error error; + if (wp) + { + user_id_t watchID = wp->GetID(); + addr_t addr = wp->GetLoadAddress(); + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_WATCHPOINTS)); + if (log) + log->Printf ("ProcessPOSIX::EnableWatchpoint(watchID = %" PRIu64 ")", + watchID); + if (wp->IsEnabled()) + { + if (log) + log->Printf("ProcessPOSIX::EnableWatchpoint(watchID = %" PRIu64 + ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", + watchID, (uint64_t)addr); + return error; + } + + // Try to find a vacant watchpoint slot in the inferiors' main thread + uint32_t wp_hw_index = LLDB_INVALID_INDEX32; + Mutex::Locker lock(m_thread_list.GetMutex()); + POSIXThread *thread = static_cast<POSIXThread*>( + m_thread_list.GetThreadAtIndex(0, false).get()); + + if (thread) + wp_hw_index = thread->FindVacantWatchpointIndex(); + + if (wp_hw_index == LLDB_INVALID_INDEX32) + { + error.SetErrorString("Setting hardware watchpoint failed."); + } + else + { + wp->SetHardwareIndex(wp_hw_index); + bool wp_enabled = true; + uint32_t thread_count = m_thread_list.GetSize(false); + for (uint32_t i = 0; i < thread_count; ++i) + { + thread = static_cast<POSIXThread*>( + m_thread_list.GetThreadAtIndex(i, false).get()); + if (thread) + wp_enabled &= thread->EnableHardwareWatchpoint(wp); + else + wp_enabled = false; + } + if (wp_enabled) + { + wp->SetEnabled(true, notify); + return error; + } + else + { + // Watchpoint enabling failed on at least one + // of the threads so roll back all of them + DisableWatchpoint(wp, false); + error.SetErrorString("Setting hardware watchpoint failed"); + } + } + } + else + error.SetErrorString("Watchpoint argument was NULL."); + return error; +} + +Error +ProcessPOSIX::DisableWatchpoint(Watchpoint *wp, bool notify) +{ + Error error; + if (wp) + { + user_id_t watchID = wp->GetID(); + addr_t addr = wp->GetLoadAddress(); + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_WATCHPOINTS)); + if (log) + log->Printf("ProcessPOSIX::DisableWatchpoint(watchID = %" PRIu64 ")", + watchID); + if (!wp->IsEnabled()) + { + if (log) + log->Printf("ProcessPOSIX::DisableWatchpoint(watchID = %" PRIu64 + ") addr = 0x%8.8" PRIx64 ": watchpoint already disabled.", + watchID, (uint64_t)addr); + // This is needed (for now) to keep watchpoints disabled correctly + wp->SetEnabled(false, notify); + return error; + } + + if (wp->IsHardware()) + { + bool wp_disabled = true; + Mutex::Locker lock(m_thread_list.GetMutex()); + uint32_t thread_count = m_thread_list.GetSize(false); + for (uint32_t i = 0; i < thread_count; ++i) + { + POSIXThread *thread = static_cast<POSIXThread*>( + m_thread_list.GetThreadAtIndex(i, false).get()); + if (thread) + wp_disabled &= thread->DisableHardwareWatchpoint(wp); + else + wp_disabled = false; + } + if (wp_disabled) + { + wp->SetHardwareIndex(LLDB_INVALID_INDEX32); + wp->SetEnabled(false, notify); + return error; + } + else + error.SetErrorString("Disabling hardware watchpoint failed"); + } + } + else + error.SetErrorString("Watchpoint argument was NULL."); + return error; +} + +Error +ProcessPOSIX::GetWatchpointSupportInfo(uint32_t &num) +{ + Error error; + Mutex::Locker lock(m_thread_list.GetMutex()); + POSIXThread *thread = static_cast<POSIXThread*>( + m_thread_list.GetThreadAtIndex(0, false).get()); + if (thread) + num = thread->NumSupportedHardwareWatchpoints(); + else + error.SetErrorString("Process does not exist."); + return error; +} + +Error +ProcessPOSIX::GetWatchpointSupportInfo(uint32_t &num, bool &after) +{ + Error error = GetWatchpointSupportInfo(num); + // Watchpoints trigger and halt the inferior after + // the corresponding instruction has been executed. + after = true; + return error; +} + +uint32_t +ProcessPOSIX::UpdateThreadListIfNeeded() +{ + Mutex::Locker lock(m_thread_list.GetMutex()); + // Do not allow recursive updates. + return m_thread_list.GetSize(false); +} + +bool +ProcessPOSIX::UpdateThreadList(ThreadList &old_thread_list, ThreadList &new_thread_list) +{ + Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD)); + if (log && log->GetMask().Test(POSIX_LOG_VERBOSE)) + log->Printf ("ProcessPOSIX::%s() (pid = %" PRIi64 ")", __FUNCTION__, GetID()); + + bool has_updated = false; + // Update the process thread list with this new thread. + // FIXME: We should be using tid, not pid. + assert(m_monitor); + ThreadSP thread_sp (old_thread_list.FindThreadByID (GetID(), false)); + if (!thread_sp) { + thread_sp.reset(CreateNewPOSIXThread(*this, GetID())); + has_updated = true; + } + + if (log && log->GetMask().Test(POSIX_LOG_VERBOSE)) + log->Printf ("ProcessPOSIX::%s() updated pid = %" PRIi64, __FUNCTION__, GetID()); + new_thread_list.AddThread(thread_sp); + + return has_updated; // the list has been updated +} + +ByteOrder +ProcessPOSIX::GetByteOrder() const +{ + // FIXME: We should be able to extract this value directly. See comment in + // ProcessPOSIX(). + return m_byte_order; +} + +size_t +ProcessPOSIX::PutSTDIN(const char *buf, size_t len, Error &error) +{ + ssize_t status; + if ((status = write(m_monitor->GetTerminalFD(), buf, len)) < 0) + { + error.SetErrorToErrno(); + return 0; + } + return status; +} + +//------------------------------------------------------------------------------ +// Utility functions. + +bool +ProcessPOSIX::HasExited() +{ + switch (GetPrivateState()) + { + default: + break; + + case eStateDetached: + case eStateExited: + return true; + } + + return false; +} + +bool +ProcessPOSIX::IsStopped() +{ + switch (GetPrivateState()) + { + default: + break; + + case eStateStopped: + case eStateCrashed: + case eStateSuspended: + return true; + } + + return false; +} + +bool +ProcessPOSIX::IsAThreadRunning() +{ + bool is_running = false; + Mutex::Locker lock(m_thread_list.GetMutex()); + uint32_t thread_count = m_thread_list.GetSize(false); + for (uint32_t i = 0; i < thread_count; ++i) + { + POSIXThread *thread = static_cast<POSIXThread*>( + m_thread_list.GetThreadAtIndex(i, false).get()); + StateType thread_state = thread->GetState(); + if (thread_state == eStateRunning || thread_state == eStateStepping) + { + is_running = true; + break; + } + } + return is_running; +} + +const DataBufferSP +ProcessPOSIX::GetAuxvData () +{ + // If we're the local platform, we can ask the host for auxv data. + PlatformSP platform_sp = m_target.GetPlatform (); + if (platform_sp && platform_sp->IsHost ()) + return lldb_private::Host::GetAuxvData(this); + + // Somewhat unexpected - the process is not running locally or we don't have a platform. + assert (false && "no platform or not the host - how did we get here with ProcessPOSIX?"); + return DataBufferSP (); +} diff --git a/source/Plugins/Process/FreeBSD/ProcessPOSIX.h b/source/Plugins/Process/FreeBSD/ProcessPOSIX.h new file mode 100644 index 0000000..70694cb --- /dev/null +++ b/source/Plugins/Process/FreeBSD/ProcessPOSIX.h @@ -0,0 +1,205 @@ +//===-- ProcessPOSIX.h ------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_ProcessPOSIX_H_ +#define liblldb_ProcessPOSIX_H_ + +// C Includes + +// C++ Includes +#include <queue> +#include <set> + +// Other libraries and framework includes +#include "lldb/Target/Process.h" +#include "ProcessMessage.h" + +class ProcessMonitor; +class POSIXThread; + +class ProcessPOSIX : + public lldb_private::Process +{ +public: + + //------------------------------------------------------------------ + // Constructors and destructors + //------------------------------------------------------------------ + ProcessPOSIX(lldb_private::Target& target, + lldb_private::Listener &listener, + lldb_private::UnixSignalsSP &unix_signals_sp); + + virtual + ~ProcessPOSIX(); + + //------------------------------------------------------------------ + // Process protocol. + //------------------------------------------------------------------ + void + Finalize() override; + + bool + CanDebug(lldb_private::Target &target, bool plugin_specified_by_name) override; + + lldb_private::Error + WillLaunch(lldb_private::Module *module) override; + + lldb_private::Error + DoAttachToProcessWithID (lldb::pid_t pid, const lldb_private::ProcessAttachInfo &attach_info) override; + + lldb_private::Error + DoLaunch (lldb_private::Module *exe_module, + lldb_private::ProcessLaunchInfo &launch_info) override; + + void + DidLaunch() override; + + lldb_private::Error + DoResume() override; + + lldb_private::Error + DoHalt(bool &caused_stop) override; + + lldb_private::Error + DoDetach(bool keep_stopped) override = 0; + + lldb_private::Error + DoSignal(int signal) override; + + lldb_private::Error + DoDestroy() override; + + void + DoDidExec() override; + + void + RefreshStateAfterStop() override; + + bool + IsAlive() override; + + size_t + DoReadMemory(lldb::addr_t vm_addr, + void *buf, + size_t size, + lldb_private::Error &error) override; + + size_t + DoWriteMemory(lldb::addr_t vm_addr, const void *buf, size_t size, + lldb_private::Error &error) override; + + lldb::addr_t + DoAllocateMemory(size_t size, uint32_t permissions, + lldb_private::Error &error) override; + + lldb_private::Error + DoDeallocateMemory(lldb::addr_t ptr) override; + + virtual size_t + GetSoftwareBreakpointTrapOpcode(lldb_private::BreakpointSite* bp_site); + + lldb_private::Error + EnableBreakpointSite(lldb_private::BreakpointSite *bp_site) override; + + lldb_private::Error + DisableBreakpointSite(lldb_private::BreakpointSite *bp_site) override; + + lldb_private::Error + EnableWatchpoint(lldb_private::Watchpoint *wp, bool notify = true) override; + + lldb_private::Error + DisableWatchpoint(lldb_private::Watchpoint *wp, bool notify = true) override; + + lldb_private::Error + GetWatchpointSupportInfo(uint32_t &num) override; + + lldb_private::Error + GetWatchpointSupportInfo(uint32_t &num, bool &after) override; + + virtual uint32_t + UpdateThreadListIfNeeded(); + + bool + UpdateThreadList(lldb_private::ThreadList &old_thread_list, + lldb_private::ThreadList &new_thread_list) override = 0; + + virtual lldb::ByteOrder + GetByteOrder() const; + + lldb::addr_t + GetImageInfoAddress() override; + + size_t + PutSTDIN(const char *buf, size_t len, lldb_private::Error &error) override; + + const lldb::DataBufferSP + GetAuxvData () override; + + //-------------------------------------------------------------------------- + // ProcessPOSIX internal API. + + /// Registers the given message with this process. + virtual void + SendMessage(const ProcessMessage &message); + + ProcessMonitor & + GetMonitor() { assert(m_monitor); return *m_monitor; } + + lldb_private::FileSpec + GetFileSpec(const lldb_private::FileAction *file_action, + const lldb_private::FileSpec &default_file_spec, + const lldb_private::FileSpec &dbg_pts_file_spec); + + /// Adds the thread to the list of threads for which we have received the initial stopping signal. + /// The \p stop_tid parameter indicates the thread which the stop happened for. + bool + AddThreadForInitialStopIfNeeded(lldb::tid_t stop_tid); + + bool + WaitingForInitialStop(lldb::tid_t stop_tid); + + virtual POSIXThread * + CreateNewPOSIXThread(lldb_private::Process &process, lldb::tid_t tid); + +protected: + /// Target byte order. + lldb::ByteOrder m_byte_order; + + /// Process monitor; + ProcessMonitor *m_monitor; + + /// The module we are executing. + lldb_private::Module *m_module; + + /// Message queue notifying this instance of inferior process state changes. + lldb_private::Mutex m_message_mutex; + std::queue<ProcessMessage> m_message_queue; + + /// Drive any exit events to completion. + bool m_exit_now; + + /// Returns true if the process has exited. + bool HasExited(); + + /// Returns true if the process is stopped. + bool IsStopped(); + + /// Returns true if at least one running is currently running + bool IsAThreadRunning(); + + typedef std::map<lldb::addr_t, lldb::addr_t> MMapMap; + MMapMap m_addr_to_mmap_size; + + typedef std::set<lldb::tid_t> ThreadStopSet; + /// Every thread begins with a stop signal. This keeps track + /// of the threads for which we have received the stop signal. + ThreadStopSet m_seen_initial_stop; +}; + +#endif // liblldb_MacOSXProcess_H_ diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm.cpp b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm.cpp new file mode 100644 index 0000000..ac2f81d --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm.cpp @@ -0,0 +1,322 @@ +//===-- RegisterContextPOSIXProcessMonitor_arm.cpp -----------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===---------------------------------------------------------------------===// + +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/RegisterValue.h" +#include "lldb/Target/Thread.h" + +#include "RegisterContextPOSIX_arm.h" +#include "ProcessPOSIX.h" +#include "RegisterContextPOSIXProcessMonitor_arm.h" +#include "ProcessMonitor.h" + +using namespace lldb_private; +using namespace lldb; + +#define REG_CONTEXT_SIZE (GetGPRSize()) + +RegisterContextPOSIXProcessMonitor_arm::RegisterContextPOSIXProcessMonitor_arm(Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info) + : RegisterContextPOSIX_arm(thread, concrete_frame_idx, register_info) +{ +} + +ProcessMonitor & +RegisterContextPOSIXProcessMonitor_arm::GetMonitor() +{ + ProcessSP base = CalculateProcess(); + ProcessPOSIX *process = static_cast<ProcessPOSIX*>(base.get()); + return process->GetMonitor(); +} + +bool +RegisterContextPOSIXProcessMonitor_arm::ReadGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadGPR(m_thread.GetID(), &m_gpr_arm, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_arm::ReadFPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadFPR(m_thread.GetID(), &m_fpr, sizeof(m_fpr)); +} + +bool +RegisterContextPOSIXProcessMonitor_arm::WriteGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteGPR(m_thread.GetID(), &m_gpr_arm, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_arm::WriteFPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteFPR(m_thread.GetID(), &m_fpr, sizeof(m_fpr)); +} + +bool +RegisterContextPOSIXProcessMonitor_arm::ReadRegister(const unsigned reg, + RegisterValue &value) +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg), + GetRegisterName(reg), + GetRegisterSize(reg), + value); +} + +bool +RegisterContextPOSIXProcessMonitor_arm::WriteRegister(const unsigned reg, + const RegisterValue &value) +{ + unsigned reg_to_write = reg; + RegisterValue value_to_write = value; + + // Check if this is a subregister of a full register. + const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg); + if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) + { + RegisterValue full_value; + uint32_t full_reg = reg_info->invalidate_regs[0]; + const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg); + + // Read the full register. + if (ReadRegister(full_reg_info, full_value)) + { + Error error; + ByteOrder byte_order = GetByteOrder(); + uint8_t dst[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the full register. + const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info, + dst, + sizeof(dst), + byte_order, + error); + if (error.Success() && dest_size) + { + uint8_t src[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the source data. + const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error); + if (error.Success() && src_size && (src_size < dest_size)) + { + // Copy the src bytes to the destination. + memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size); + // Set this full register as the value to write. + value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order); + value_to_write.SetType(full_reg_info); + reg_to_write = full_reg; + } + } + } + } + + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg_to_write), + GetRegisterName(reg_to_write), + value_to_write); +} + +bool +RegisterContextPOSIXProcessMonitor_arm::ReadRegister(const RegisterInfo *reg_info, RegisterValue &value) +{ + if (!reg_info) + return false; + + const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; + + if (IsFPR(reg)) + { + if (!ReadFPR()) + return false; + } + else + { + return ReadRegister(reg, value); + } + + // Get pointer to m_fpr variable and set the data from it. + assert (reg_info->byte_offset < sizeof m_fpr); + uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset; + switch (reg_info->byte_size) + { + case 2: + value.SetUInt16(*(uint16_t *)src); + return true; + case 4: + value.SetUInt32(*(uint32_t *)src); + return true; + case 8: + value.SetUInt64(*(uint64_t *)src); + return true; + default: + assert(false && "Unhandled data size."); + return false; + } +} + +bool +RegisterContextPOSIXProcessMonitor_arm::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &value) +{ + const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; + + if (IsGPR(reg)) + { + return WriteRegister(reg, value); + } + else if (IsFPR(reg)) + { + return WriteFPR(); + } + + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::ReadAllRegisterValues(DataBufferSP &data_sp) +{ + bool success = false; + data_sp.reset (new DataBufferHeap (REG_CONTEXT_SIZE, 0)); + if (data_sp && ReadGPR () && ReadFPR ()) + { + uint8_t *dst = data_sp->GetBytes(); + success = dst != 0; + + if (success) + { + ::memcpy (dst, &m_gpr_arm, GetGPRSize()); + dst += GetGPRSize(); + ::memcpy (dst, &m_fpr, sizeof(m_fpr)); + } + } + return success; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::WriteAllRegisterValues(const DataBufferSP &data_sp) +{ + bool success = false; + if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) + { + uint8_t *src = data_sp->GetBytes(); + if (src) + { + ::memcpy (&m_gpr_arm, src, GetGPRSize()); + + if (WriteGPR()) + { + src += GetGPRSize(); + ::memcpy (&m_fpr, src, sizeof(m_fpr)); + + success = WriteFPR(); + } + } + } + return success; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_arm::SetHardwareWatchpoint(addr_t addr, size_t size, + bool read, bool write) +{ + const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); + uint32_t hw_index; + + for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) + { + if (IsWatchpointVacant(hw_index)) + return SetHardwareWatchpointWithIndex(addr, size, + read, write, + hw_index); + } + + return LLDB_INVALID_INDEX32; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::ClearHardwareWatchpoint(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::HardwareSingleStep(bool enable) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::UpdateAfterBreakpoint() +{ + lldb::addr_t pc; + + if ((pc = GetPC()) == LLDB_INVALID_ADDRESS) + return false; + + return true; +} + +unsigned +RegisterContextPOSIXProcessMonitor_arm::GetRegisterIndexFromOffset(unsigned offset) +{ + unsigned reg; + for (reg = 0; reg < k_num_registers_arm; reg++) + { + if (GetRegisterInfo()[reg].byte_offset == offset) + break; + } + assert(reg < k_num_registers_arm && "Invalid register offset."); + return reg; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::IsWatchpointHit(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::ClearWatchpointHits() +{ + return false; +} + +addr_t +RegisterContextPOSIXProcessMonitor_arm::GetWatchpointAddress(uint32_t hw_index) +{ + return LLDB_INVALID_ADDRESS; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::IsWatchpointVacant(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm::SetHardwareWatchpointWithIndex(addr_t addr, size_t size, + bool read, bool write, + uint32_t hw_index) +{ + return false; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_arm::NumSupportedHardwareWatchpoints() +{ + return 0; +} + diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm.h b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm.h new file mode 100644 index 0000000..12a43c7 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm.h @@ -0,0 +1,95 @@ +//===-- RegisterContextPOSIXProcessMonitor_arm.h --------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_RegisterContextPOSIXProcessMonitor_arm_H_ +#define liblldb_RegisterContextPOSIXProcessMonitor_arm_H_ + +#include "Plugins/Process/Utility/RegisterContextPOSIX_arm.h" + +class RegisterContextPOSIXProcessMonitor_arm: + public RegisterContextPOSIX_arm, + public POSIXBreakpointProtocol +{ +public: + RegisterContextPOSIXProcessMonitor_arm(lldb_private::Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info); + +protected: + bool + ReadGPR(); + + bool + ReadFPR(); + + bool + WriteGPR(); + + bool + WriteFPR(); + + // lldb_private::RegisterContext + bool + ReadRegister(const unsigned reg, lldb_private::RegisterValue &value); + + bool + WriteRegister(const unsigned reg, const lldb_private::RegisterValue &value); + + bool + ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value); + + bool + WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value); + + bool + ReadAllRegisterValues(lldb::DataBufferSP &data_sp); + + bool + WriteAllRegisterValues(const lldb::DataBufferSP &data_sp); + + uint32_t + SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read, bool write); + + bool + ClearHardwareWatchpoint(uint32_t hw_index); + + bool + HardwareSingleStep(bool enable); + + // POSIXBreakpointProtocol + bool + UpdateAfterBreakpoint(); + + unsigned + GetRegisterIndexFromOffset(unsigned offset); + + bool + IsWatchpointHit(uint32_t hw_index); + + bool + ClearWatchpointHits(); + + lldb::addr_t + GetWatchpointAddress(uint32_t hw_index); + + bool + IsWatchpointVacant(uint32_t hw_index); + + bool + SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size, bool read, bool write, uint32_t hw_index); + + uint32_t + NumSupportedHardwareWatchpoints(); + +private: + ProcessMonitor & + GetMonitor(); +}; + +#endif diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp new file mode 100644 index 0000000..d79def5 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp @@ -0,0 +1,322 @@ +//===-- RegisterContextPOSIXProcessMonitor_arm64.cpp -----------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===---------------------------------------------------------------------===// + +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/RegisterValue.h" +#include "lldb/Target/Thread.h" + +#include "Plugins/Process/Utility/RegisterContextPOSIX_arm64.h" +#include "ProcessPOSIX.h" +#include "ProcessMonitor.h" +#include "RegisterContextPOSIXProcessMonitor_arm64.h" + +#define REG_CONTEXT_SIZE (GetGPRSize()) + +using namespace lldb; +using namespace lldb_private; + +RegisterContextPOSIXProcessMonitor_arm64::RegisterContextPOSIXProcessMonitor_arm64(lldb_private::Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info) + : RegisterContextPOSIX_arm64(thread, concrete_frame_idx, register_info) +{ +} + +ProcessMonitor & +RegisterContextPOSIXProcessMonitor_arm64::GetMonitor() +{ + lldb::ProcessSP base = CalculateProcess(); + ProcessPOSIX *process = static_cast<ProcessPOSIX*>(base.get()); + return process->GetMonitor(); +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::ReadGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadGPR(m_thread.GetID(), &m_gpr_arm64, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::ReadFPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadFPR(m_thread.GetID(), &m_fpr, sizeof m_fpr); +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::WriteGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteGPR(m_thread.GetID(), &m_gpr_arm64, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::WriteFPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteFPR(m_thread.GetID(), &m_fpr, sizeof m_fpr); +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::ReadRegister(const unsigned reg, + lldb_private::RegisterValue &value) +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg), + GetRegisterName(reg), + GetRegisterSize(reg), + value); +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::WriteRegister(const unsigned reg, + const lldb_private::RegisterValue &value) +{ + unsigned reg_to_write = reg; + lldb_private::RegisterValue value_to_write = value; + + // Check if this is a subregister of a full register. + const lldb_private::RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg); + if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) + { + lldb_private::RegisterValue full_value; + uint32_t full_reg = reg_info->invalidate_regs[0]; + const lldb_private::RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg); + + // Read the full register. + if (ReadRegister(full_reg_info, full_value)) + { + lldb_private::Error error; + lldb::ByteOrder byte_order = GetByteOrder(); + uint8_t dst[lldb_private::RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the full register. + const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info, + dst, + sizeof(dst), + byte_order, + error); + if (error.Success() && dest_size) + { + uint8_t src[lldb_private::RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the source data. + const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error); + if (error.Success() && src_size && (src_size < dest_size)) + { + // Copy the src bytes to the destination. + ::memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size); + // Set this full register as the value to write. + value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order); + value_to_write.SetType(full_reg_info); + reg_to_write = full_reg; + } + } + } + } + + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg_to_write), + GetRegisterName(reg_to_write), + value_to_write); +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value) +{ + if (!reg_info) + return false; + + const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + + if (IsFPR(reg)) + { + if (!ReadFPR()) + return false; + } + else + { + uint32_t full_reg = reg; + bool is_subreg = reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM); + + if (is_subreg) + { + // Read the full aligned 64-bit register. + full_reg = reg_info->invalidate_regs[0]; + } + return ReadRegister(full_reg, value); + } + + // Get pointer to m_fpr variable and set the data from it. + assert (reg_info->byte_offset < sizeof m_fpr); + uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset; + switch (reg_info->byte_size) + { + case 2: + value.SetUInt16(*(uint16_t *)src); + return true; + case 4: + value.SetUInt32(*(uint32_t *)src); + return true; + case 8: + value.SetUInt64(*(uint64_t *)src); + return true; + default: + assert(false && "Unhandled data size."); + return false; + } +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value) +{ + const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + + if (IsGPR(reg)) + return WriteRegister(reg, value); + + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::ReadAllRegisterValues(lldb::DataBufferSP &data_sp) +{ + bool success = false; + data_sp.reset (new lldb_private::DataBufferHeap (REG_CONTEXT_SIZE, 0)); + if (data_sp && ReadGPR () && ReadFPR ()) + { + uint8_t *dst = data_sp->GetBytes(); + success = dst != 0; + + if (success) + { + ::memcpy (dst, &m_gpr_arm64, GetGPRSize()); + dst += GetGPRSize(); + ::memcpy (dst, &m_fpr, sizeof m_fpr); + } + } + return success; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) +{ + bool success = false; + if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) + { + uint8_t *src = data_sp->GetBytes(); + if (src) + { + ::memcpy (&m_gpr_arm64, src, GetGPRSize()); + if (WriteGPR()) { + src += GetGPRSize(); + ::memcpy (&m_fpr, src, sizeof m_fpr); + success = WriteFPR(); + } + } + } + return success; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_arm64::SetHardwareWatchpoint(lldb::addr_t addr, size_t size, + bool read, bool write) +{ + const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); + uint32_t hw_index; + + for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) + { + if (IsWatchpointVacant(hw_index)) + return SetHardwareWatchpointWithIndex(addr, size, + read, write, + hw_index); + } + + return LLDB_INVALID_INDEX32; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::ClearHardwareWatchpoint(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::HardwareSingleStep(bool enable) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::UpdateAfterBreakpoint() +{ + // PC points one byte past the int3 responsible for the breakpoint. + lldb::addr_t pc; + + if ((pc = GetPC()) == LLDB_INVALID_ADDRESS) + return false; + + SetPC(pc - 1); + return true; +} + +unsigned +RegisterContextPOSIXProcessMonitor_arm64::GetRegisterIndexFromOffset(unsigned offset) +{ + unsigned reg; + for (reg = 0; reg < k_num_registers_arm64; reg++) + { + if (GetRegisterInfo()[reg].byte_offset == offset) + break; + } + assert(reg < k_num_registers_arm64 && "Invalid register offset."); + return reg; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::IsWatchpointHit(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::ClearWatchpointHits() +{ + return false; +} + +lldb::addr_t +RegisterContextPOSIXProcessMonitor_arm64::GetWatchpointAddress(uint32_t hw_index) +{ + return LLDB_INVALID_ADDRESS; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::IsWatchpointVacant(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_arm64::SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size, + bool read, bool write, + uint32_t hw_index) +{ + return false; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_arm64::NumSupportedHardwareWatchpoints() +{ + return 0; +} diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.h b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.h new file mode 100644 index 0000000..eb24d48 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.h @@ -0,0 +1,95 @@ +//===-- RegisterContextPOSIXProcessMonitor_arm64.h --------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_RegisterContextPOSIXProcessMonitor_arm64_H_ +#define liblldb_RegisterContextPOSIXProcessMonitor_arm64_H_ + +#include "Plugins/Process/Utility/RegisterContextPOSIX_arm64.h" + +class RegisterContextPOSIXProcessMonitor_arm64: + public RegisterContextPOSIX_arm64, + public POSIXBreakpointProtocol +{ +public: + RegisterContextPOSIXProcessMonitor_arm64(lldb_private::Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info); + +protected: + bool + ReadGPR(); + + bool + ReadFPR(); + + bool + WriteGPR(); + + bool + WriteFPR(); + + // lldb_private::RegisterContext + bool + ReadRegister(const unsigned reg, lldb_private::RegisterValue &value); + + bool + WriteRegister(const unsigned reg, const lldb_private::RegisterValue &value); + + bool + ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value); + + bool + WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value); + + bool + ReadAllRegisterValues(lldb::DataBufferSP &data_sp); + + bool + WriteAllRegisterValues(const lldb::DataBufferSP &data_sp); + + uint32_t + SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read, bool write); + + bool + ClearHardwareWatchpoint(uint32_t hw_index); + + bool + HardwareSingleStep(bool enable); + + // POSIXBreakpointProtocol + bool + UpdateAfterBreakpoint(); + + unsigned + GetRegisterIndexFromOffset(unsigned offset); + + bool + IsWatchpointHit(uint32_t hw_index); + + bool + ClearWatchpointHits(); + + lldb::addr_t + GetWatchpointAddress(uint32_t hw_index); + + bool + IsWatchpointVacant(uint32_t hw_index); + + bool + SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size, bool read, bool write, uint32_t hw_index); + + uint32_t + NumSupportedHardwareWatchpoints(); + +private: + ProcessMonitor & + GetMonitor(); +}; + +#endif diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_mips64.cpp b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_mips64.cpp new file mode 100644 index 0000000..893a0f2 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_mips64.cpp @@ -0,0 +1,318 @@ +//===-- RegisterContextPOSIXProcessMonitor_mips64.h ------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===---------------------------------------------------------------------===// + +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/RegisterValue.h" +#include "lldb/Target/Thread.h" + +#include "Plugins/Process/Utility/RegisterContextPOSIX_mips64.h" +#include "ProcessPOSIX.h" +#include "ProcessMonitor.h" +#include "RegisterContextPOSIXProcessMonitor_mips64.h" + +using namespace lldb_private; +using namespace lldb; + +#define REG_CONTEXT_SIZE (GetGPRSize()) + +RegisterContextPOSIXProcessMonitor_mips64::RegisterContextPOSIXProcessMonitor_mips64(Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info) + : RegisterContextPOSIX_mips64(thread, concrete_frame_idx, register_info) +{ +} + +ProcessMonitor & +RegisterContextPOSIXProcessMonitor_mips64::GetMonitor() +{ + ProcessSP base = CalculateProcess(); + ProcessPOSIX *process = static_cast<ProcessPOSIX*>(base.get()); + return process->GetMonitor(); +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::ReadGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadGPR(m_thread.GetID(), &m_gpr_mips64, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::ReadFPR() +{ + // XXX not yet implemented + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::WriteGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteGPR(m_thread.GetID(), &m_gpr_mips64, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::WriteFPR() +{ + // XXX not yet implemented + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::ReadRegister(const unsigned reg, + RegisterValue &value) +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg), + GetRegisterName(reg), + GetRegisterSize(reg), + value); +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::WriteRegister(const unsigned reg, + const RegisterValue &value) +{ + unsigned reg_to_write = reg; + RegisterValue value_to_write = value; + + // Check if this is a subregister of a full register. + const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg); + if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) + { + RegisterValue full_value; + uint32_t full_reg = reg_info->invalidate_regs[0]; + const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg); + + // Read the full register. + if (ReadRegister(full_reg_info, full_value)) + { + Error error; + ByteOrder byte_order = GetByteOrder(); + uint8_t dst[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the full register. + const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info, + dst, + sizeof(dst), + byte_order, + error); + if (error.Success() && dest_size) + { + uint8_t src[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the source data. + const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error); + if (error.Success() && src_size && (src_size < dest_size)) + { + // Copy the src bytes to the destination. + memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size); + // Set this full register as the value to write. + value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order); + value_to_write.SetType(full_reg_info); + reg_to_write = full_reg; + } + } + } + } + + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg_to_write), + GetRegisterName(reg_to_write), + value_to_write); +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::ReadRegister(const RegisterInfo *reg_info, RegisterValue &value) +{ + if (!reg_info) + return false; + + const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; + + if (IsFPR(reg)) + { + if (!ReadFPR()) + return false; + } + else + { + uint32_t full_reg = reg; + bool is_subreg = reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM); + + if (is_subreg) + { + // Read the full aligned 64-bit register. + full_reg = reg_info->invalidate_regs[0]; + } + + bool success = ReadRegister(full_reg, value); + + if (success) + { + // If our read was not aligned (for ah,bh,ch,dh), shift our returned value one byte to the right. + if (is_subreg && (reg_info->byte_offset & 0x1)) + value.SetUInt64(value.GetAsUInt64() >> 8); + + // If our return byte size was greater than the return value reg size, then + // use the type specified by reg_info rather than the uint64_t default + if (value.GetByteSize() > reg_info->byte_size) + value.SetType(reg_info); + } + return success; + } + + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &value) +{ + const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; + + if (IsGPR(reg)) + return WriteRegister(reg, value); + + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::ReadAllRegisterValues(DataBufferSP &data_sp) +{ + bool success = false; + data_sp.reset (new DataBufferHeap (REG_CONTEXT_SIZE, 0)); + if (data_sp && ReadGPR () && ReadFPR ()) + { + uint8_t *dst = data_sp->GetBytes(); + success = dst != 0; + + if (success) + { + ::memcpy (dst, &m_gpr_mips64, GetGPRSize()); + } + } + return success; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::WriteAllRegisterValues(const DataBufferSP &data_sp) +{ + bool success = false; + if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) + { + uint8_t *src = data_sp->GetBytes(); + if (src) + { + ::memcpy (&m_gpr_mips64, src, GetGPRSize()); + + if (WriteGPR()) + { + src += GetGPRSize(); + } + } + } + return success; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_mips64::SetHardwareWatchpoint(addr_t addr, size_t size, + bool read, bool write) +{ + const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); + uint32_t hw_index; + + for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) + { + if (IsWatchpointVacant(hw_index)) + return SetHardwareWatchpointWithIndex(addr, size, + read, write, + hw_index); + } + + return LLDB_INVALID_INDEX32; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::ClearHardwareWatchpoint(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::HardwareSingleStep(bool enable) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::UpdateAfterBreakpoint() +{ + // PC points one byte past the int3 responsible for the breakpoint. + lldb::addr_t pc; + + if ((pc = GetPC()) == LLDB_INVALID_ADDRESS) + return false; + + SetPC(pc - 1); + return true; +} + +unsigned +RegisterContextPOSIXProcessMonitor_mips64::GetRegisterIndexFromOffset(unsigned offset) +{ + unsigned reg; + for (reg = 0; reg < k_num_registers_mips64; reg++) + { + if (GetRegisterInfo()[reg].byte_offset == offset) + break; + } + assert(reg < k_num_registers_mips64 && "Invalid register offset."); + return reg; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::IsWatchpointHit(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::ClearWatchpointHits() +{ + return false; +} + +addr_t +RegisterContextPOSIXProcessMonitor_mips64::GetWatchpointAddress(uint32_t hw_index) +{ + return LLDB_INVALID_ADDRESS; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::IsWatchpointVacant(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_mips64::SetHardwareWatchpointWithIndex(addr_t addr, size_t size, + bool read, bool write, + uint32_t hw_index) +{ + return false; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_mips64::NumSupportedHardwareWatchpoints() +{ + return 0; +} + diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_mips64.h b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_mips64.h new file mode 100644 index 0000000..79e4468 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_mips64.h @@ -0,0 +1,95 @@ +//===-- RegisterContextPOSIXProcessMonitor_mips64.h -------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_RegisterContextPOSIXProcessMonitor_mips64_H_ +#define liblldb_RegisterContextPOSIXProcessMonitor_mips64_H_ + +#include "Plugins/Process/Utility/RegisterContextPOSIX_mips64.h" + +class RegisterContextPOSIXProcessMonitor_mips64: + public RegisterContextPOSIX_mips64, + public POSIXBreakpointProtocol +{ +public: + RegisterContextPOSIXProcessMonitor_mips64(lldb_private::Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info); + +protected: + bool + ReadGPR(); + + bool + ReadFPR(); + + bool + WriteGPR(); + + bool + WriteFPR(); + + // lldb_private::RegisterContext + bool + ReadRegister(const unsigned reg, lldb_private::RegisterValue &value); + + bool + WriteRegister(const unsigned reg, const lldb_private::RegisterValue &value); + + bool + ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value); + + bool + WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value); + + bool + ReadAllRegisterValues(lldb::DataBufferSP &data_sp); + + bool + WriteAllRegisterValues(const lldb::DataBufferSP &data_sp); + + uint32_t + SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read, bool write); + + bool + ClearHardwareWatchpoint(uint32_t hw_index); + + bool + HardwareSingleStep(bool enable); + + // POSIXBreakpointProtocol + bool + UpdateAfterBreakpoint(); + + unsigned + GetRegisterIndexFromOffset(unsigned offset); + + bool + IsWatchpointHit(uint32_t hw_index); + + bool + ClearWatchpointHits(); + + lldb::addr_t + GetWatchpointAddress(uint32_t hw_index); + + bool + IsWatchpointVacant(uint32_t hw_index); + + bool + SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size, bool read, bool write, uint32_t hw_index); + + uint32_t + NumSupportedHardwareWatchpoints(); + +private: + ProcessMonitor & + GetMonitor(); +}; + +#endif diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_powerpc.cpp b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_powerpc.cpp new file mode 100644 index 0000000..8c12b62 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_powerpc.cpp @@ -0,0 +1,337 @@ +//===-- RegisterContextPOSIXProcessMonitor_powerpc.h ------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===---------------------------------------------------------------------===// + +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/RegisterValue.h" +#include "lldb/Target/Thread.h" + +#include "RegisterContextPOSIX_powerpc.h" +#include "ProcessPOSIX.h" +#include "RegisterContextPOSIXProcessMonitor_powerpc.h" +#include "ProcessMonitor.h" + +using namespace lldb_private; +using namespace lldb; + +#define REG_CONTEXT_SIZE (GetGPRSize()) + +RegisterContextPOSIXProcessMonitor_powerpc::RegisterContextPOSIXProcessMonitor_powerpc(Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info) + : RegisterContextPOSIX_powerpc(thread, concrete_frame_idx, register_info) +{ +} + +ProcessMonitor & +RegisterContextPOSIXProcessMonitor_powerpc::GetMonitor() +{ + ProcessSP base = CalculateProcess(); + ProcessPOSIX *process = static_cast<ProcessPOSIX*>(base.get()); + return process->GetMonitor(); +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::ReadGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadGPR(m_thread.GetID(), &m_gpr_powerpc, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::ReadFPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadFPR(m_thread.GetID(), &m_fpr_powerpc, sizeof(m_fpr_powerpc)); +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::ReadVMX() +{ + // XXX: Need a way to read/write process VMX registers with ptrace. + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::WriteGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteGPR(m_thread.GetID(), &m_gpr_powerpc, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::WriteFPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteFPR(m_thread.GetID(), &m_fpr_powerpc, sizeof(m_fpr_powerpc)); +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::WriteVMX() +{ + // XXX: Need a way to read/write process VMX registers with ptrace. + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::ReadRegister(const unsigned reg, + RegisterValue &value) +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg), + GetRegisterName(reg), + GetRegisterSize(reg), + value); +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::WriteRegister(const unsigned reg, + const RegisterValue &value) +{ + unsigned reg_to_write = reg; + RegisterValue value_to_write = value; + + // Check if this is a subregister of a full register. + const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg); + if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) + { + RegisterValue full_value; + uint32_t full_reg = reg_info->invalidate_regs[0]; + const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg); + + // Read the full register. + if (ReadRegister(full_reg_info, full_value)) + { + Error error; + ByteOrder byte_order = GetByteOrder(); + uint8_t dst[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the full register. + const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info, + dst, + sizeof(dst), + byte_order, + error); + if (error.Success() && dest_size) + { + uint8_t src[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the source data. + const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error); + if (error.Success() && src_size && (src_size < dest_size)) + { + // Copy the src bytes to the destination. + memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size); + // Set this full register as the value to write. + value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order); + value_to_write.SetType(full_reg_info); + reg_to_write = full_reg; + } + } + } + } + + ProcessMonitor &monitor = GetMonitor(); + // Account for the fact that 32-bit targets on powerpc64 really use 64-bit + // registers in ptrace, but expose here 32-bit registers with a higher + // offset. + uint64_t offset = GetRegisterOffset(reg_to_write); + offset &= ~(sizeof(uintptr_t) - 1); + return monitor.WriteRegisterValue(m_thread.GetID(), + offset, + GetRegisterName(reg_to_write), + value_to_write); +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::ReadRegister(const RegisterInfo *reg_info, RegisterValue &value) +{ + if (!reg_info) + return false; + + const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; + + if (IsFPR(reg)) + { + if (!ReadFPR()) + return false; + uint8_t *src = (uint8_t *)&m_fpr_powerpc + reg_info->byte_offset; + value.SetUInt64(*(uint64_t*)src); + } + else if (IsGPR(reg)) + { + bool success = ReadRegister(reg, value); + + if (success) + { + // If our return byte size was greater than the return value reg size, then + // use the type specified by reg_info rather than the uint64_t default + if (value.GetByteSize() > reg_info->byte_size) + value.SetType(reg_info); + } + return success; + } + + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &value) +{ + const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; + + if (IsGPR(reg)) + { + return WriteRegister(reg, value); + } + else if (IsFPR(reg)) + { + assert (reg_info->byte_offset < sizeof(m_fpr_powerpc)); + uint8_t *dst = (uint8_t *)&m_fpr_powerpc + reg_info->byte_offset; + *(uint64_t *)dst = value.GetAsUInt64(); + return WriteFPR(); + } + + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::ReadAllRegisterValues(DataBufferSP &data_sp) +{ + bool success = false; + data_sp.reset (new DataBufferHeap (REG_CONTEXT_SIZE, 0)); + if (data_sp && ReadGPR () && ReadFPR ()) + { + uint8_t *dst = data_sp->GetBytes(); + success = dst != 0; + + if (success) + { + ::memcpy (dst, &m_gpr_powerpc, GetGPRSize()); + dst += GetGPRSize(); + } + } + return success; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::WriteAllRegisterValues(const DataBufferSP &data_sp) +{ + bool success = false; + if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) + { + uint8_t *src = data_sp->GetBytes(); + if (src) + { + ::memcpy (&m_gpr_powerpc, src, GetGPRSize()); + + if (WriteGPR()) + { + src += GetGPRSize(); + ::memcpy (&m_fpr_powerpc, src, sizeof(m_fpr_powerpc)); + + success = WriteFPR(); + } + } + } + return success; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_powerpc::SetHardwareWatchpoint(addr_t addr, size_t size, + bool read, bool write) +{ + const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); + uint32_t hw_index; + + for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) + { + if (IsWatchpointVacant(hw_index)) + return SetHardwareWatchpointWithIndex(addr, size, + read, write, + hw_index); + } + + return LLDB_INVALID_INDEX32; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::ClearHardwareWatchpoint(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::HardwareSingleStep(bool enable) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::UpdateAfterBreakpoint() +{ + lldb::addr_t pc; + + if ((pc = GetPC()) == LLDB_INVALID_ADDRESS) + return false; + + return true; +} + +unsigned +RegisterContextPOSIXProcessMonitor_powerpc::GetRegisterIndexFromOffset(unsigned offset) +{ + unsigned reg; + for (reg = 0; reg < k_num_registers_powerpc; reg++) + { + if (GetRegisterInfo()[reg].byte_offset == offset) + break; + } + assert(reg < k_num_registers_powerpc && "Invalid register offset."); + return reg; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::IsWatchpointHit(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::ClearWatchpointHits() +{ + return false; +} + +addr_t +RegisterContextPOSIXProcessMonitor_powerpc::GetWatchpointAddress(uint32_t hw_index) +{ + return LLDB_INVALID_ADDRESS; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::IsWatchpointVacant(uint32_t hw_index) +{ + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_powerpc::SetHardwareWatchpointWithIndex(addr_t addr, size_t size, + bool read, bool write, + uint32_t hw_index) +{ + return false; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_powerpc::NumSupportedHardwareWatchpoints() +{ + return 0; +} + diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_powerpc.h b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_powerpc.h new file mode 100644 index 0000000..5c686df --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_powerpc.h @@ -0,0 +1,104 @@ +//===-- RegisterContextPOSIXProcessMonitor_powerpc.h -------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_RegisterContextPOSIXProcessMonitor_powerpc_H_ +#define liblldb_RegisterContextPOSIXProcessMonitor_powerpc_H_ + +#include "Plugins/Process/Utility/RegisterContextPOSIX_powerpc.h" + +class RegisterContextPOSIXProcessMonitor_powerpc: + public RegisterContextPOSIX_powerpc, + public POSIXBreakpointProtocol +{ +public: + RegisterContextPOSIXProcessMonitor_powerpc(lldb_private::Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info); + +protected: + bool + IsVMX(); + + bool + ReadGPR(); + + bool + ReadFPR(); + + bool + ReadVMX(); + + bool + WriteGPR(); + + bool + WriteFPR(); + + bool + WriteVMX(); + + // lldb_private::RegisterContext + bool + ReadRegister(const unsigned reg, lldb_private::RegisterValue &value); + + bool + WriteRegister(const unsigned reg, const lldb_private::RegisterValue &value); + + bool + ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value); + + bool + WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value); + + bool + ReadAllRegisterValues(lldb::DataBufferSP &data_sp); + + bool + WriteAllRegisterValues(const lldb::DataBufferSP &data_sp); + + uint32_t + SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read, bool write); + + bool + ClearHardwareWatchpoint(uint32_t hw_index); + + bool + HardwareSingleStep(bool enable); + + // POSIXBreakpointProtocol + bool + UpdateAfterBreakpoint(); + + unsigned + GetRegisterIndexFromOffset(unsigned offset); + + bool + IsWatchpointHit(uint32_t hw_index); + + bool + ClearWatchpointHits(); + + lldb::addr_t + GetWatchpointAddress(uint32_t hw_index); + + bool + IsWatchpointVacant(uint32_t hw_index); + + bool + SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size, bool read, bool write, uint32_t hw_index); + + uint32_t + NumSupportedHardwareWatchpoints(); + +private: + ProcessMonitor & + GetMonitor(); +}; + +#endif diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_x86.cpp b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_x86.cpp new file mode 100644 index 0000000..9245441 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_x86.cpp @@ -0,0 +1,650 @@ +//===-- RegisterContextPOSIXProcessMonitor_x86.h ---------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===---------------------------------------------------------------------===// + +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/RegisterValue.h" +#include "lldb/Target/Thread.h" + +#include "Plugins/Process/FreeBSD/ProcessPOSIX.h" +#include "RegisterContextPOSIXProcessMonitor_x86.h" +#include "Plugins/Process/FreeBSD/ProcessMonitor.h" + +using namespace lldb_private; +using namespace lldb; + +// Support ptrace extensions even when compiled without required kernel support +#ifndef NT_X86_XSTATE + #define NT_X86_XSTATE 0x202 +#endif + +#define REG_CONTEXT_SIZE (GetGPRSize() + sizeof(FPR)) + +static uint32_t +size_and_rw_bits(size_t size, bool read, bool write) +{ + uint32_t rw; + + if (read) + rw = 0x3; // READ or READ/WRITE + else if (write) + rw = 0x1; // WRITE + else + assert(0 && "read and write cannot both be false"); + + switch (size) + { + case 1: + return rw; + case 2: + return (0x1 << 2) | rw; + case 4: + return (0x3 << 2) | rw; + case 8: + return (0x2 << 2) | rw; + default: + assert(0 && "invalid size, must be one of 1, 2, 4, or 8"); + return 0; // Unreachable. Just to silence compiler. + } +} + +RegisterContextPOSIXProcessMonitor_x86_64::RegisterContextPOSIXProcessMonitor_x86_64(Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info) + : RegisterContextPOSIX_x86(thread, concrete_frame_idx, register_info) +{ +} + +ProcessMonitor & +RegisterContextPOSIXProcessMonitor_x86_64::GetMonitor() +{ + ProcessSP base = CalculateProcess(); + ProcessPOSIX *process = static_cast<ProcessPOSIX*>(base.get()); + return process->GetMonitor(); +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::ReadGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.ReadGPR(m_thread.GetID(), &m_gpr_x86_64, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::ReadFPR() +{ + ProcessMonitor &monitor = GetMonitor(); + if (GetFPRType() == eFXSAVE) + return monitor.ReadFPR(m_thread.GetID(), &m_fpr.xstate.fxsave, sizeof(m_fpr.xstate.fxsave)); + + if (GetFPRType() == eXSAVE) + return monitor.ReadRegisterSet(m_thread.GetID(), &m_iovec, sizeof(m_fpr.xstate.xsave), NT_X86_XSTATE); + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::WriteGPR() +{ + ProcessMonitor &monitor = GetMonitor(); + return monitor.WriteGPR(m_thread.GetID(), &m_gpr_x86_64, GetGPRSize()); +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::WriteFPR() +{ + ProcessMonitor &monitor = GetMonitor(); + if (GetFPRType() == eFXSAVE) + return monitor.WriteFPR(m_thread.GetID(), &m_fpr.xstate.fxsave, sizeof(m_fpr.xstate.fxsave)); + + if (GetFPRType() == eXSAVE) + return monitor.WriteRegisterSet(m_thread.GetID(), &m_iovec, sizeof(m_fpr.xstate.xsave), NT_X86_XSTATE); + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::ReadRegister(const unsigned reg, + RegisterValue &value) +{ + ProcessMonitor &monitor = GetMonitor(); + +#if defined(__FreeBSD__) + if (reg >= m_reg_info.first_dr) + return monitor.ReadDebugRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg), + GetRegisterName(reg), + GetRegisterSize(reg), + value); +#endif + return monitor.ReadRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg), + GetRegisterName(reg), + GetRegisterSize(reg), + value); +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::WriteRegister(const unsigned reg, + const RegisterValue &value) +{ + unsigned reg_to_write = reg; + RegisterValue value_to_write = value; + + // Check if this is a subregister of a full register. + const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg); + if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) + { + RegisterValue full_value; + uint32_t full_reg = reg_info->invalidate_regs[0]; + const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg); + + // Read the full register. + if (ReadRegister(full_reg_info, full_value)) + { + Error error; + ByteOrder byte_order = GetByteOrder(); + uint8_t dst[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the full register. + const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info, + dst, + sizeof(dst), + byte_order, + error); + if (error.Success() && dest_size) + { + uint8_t src[RegisterValue::kMaxRegisterByteSize]; + + // Get the bytes for the source data. + const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error); + if (error.Success() && src_size && (src_size < dest_size)) + { + // Copy the src bytes to the destination. + memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size); + // Set this full register as the value to write. + value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order); + value_to_write.SetType(full_reg_info); + reg_to_write = full_reg; + } + } + } + } + + ProcessMonitor &monitor = GetMonitor(); +#if defined(__FreeBSD__) + if (reg >= m_reg_info.first_dr) + return monitor.WriteDebugRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg_to_write), + GetRegisterName(reg_to_write), + value_to_write); +#endif + return monitor.WriteRegisterValue(m_thread.GetID(), + GetRegisterOffset(reg_to_write), + GetRegisterName(reg_to_write), + value_to_write); +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::ReadRegister(const RegisterInfo *reg_info, RegisterValue &value) +{ + if (!reg_info) + return false; + + const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; + + if (IsFPR(reg, GetFPRType())) + { + if (!ReadFPR()) + return false; + } + else + { + uint32_t full_reg = reg; + bool is_subreg = reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM); + + if (is_subreg) + { + // Read the full aligned 64-bit register. + full_reg = reg_info->invalidate_regs[0]; + } + + bool success = ReadRegister(full_reg, value); + + if (success) + { + // If our read was not aligned (for ah,bh,ch,dh), shift our returned value one byte to the right. + if (is_subreg && (reg_info->byte_offset & 0x1)) + value.SetUInt64(value.GetAsUInt64() >> 8); + + // If our return byte size was greater than the return value reg size, then + // use the type specified by reg_info rather than the uint64_t default + if (value.GetByteSize() > reg_info->byte_size) + value.SetType(reg_info); + } + return success; + } + + if (reg_info->encoding == eEncodingVector) + { + ByteOrder byte_order = GetByteOrder(); + + if (byte_order != ByteOrder::eByteOrderInvalid) + { + if (reg >= m_reg_info.first_st && reg <= m_reg_info.last_st) + value.SetBytes(m_fpr.xstate.fxsave.stmm[reg - m_reg_info.first_st].bytes, reg_info->byte_size, byte_order); + if (reg >= m_reg_info.first_mm && reg <= m_reg_info.last_mm) + value.SetBytes(m_fpr.xstate.fxsave.stmm[reg - m_reg_info.first_mm].bytes, reg_info->byte_size, byte_order); + if (reg >= m_reg_info.first_xmm && reg <= m_reg_info.last_xmm) + value.SetBytes(m_fpr.xstate.fxsave.xmm[reg - m_reg_info.first_xmm].bytes, reg_info->byte_size, byte_order); + if (reg >= m_reg_info.first_ymm && reg <= m_reg_info.last_ymm) + { + // Concatenate ymm using the register halves in xmm.bytes and ymmh.bytes + if (GetFPRType() == eXSAVE && CopyXSTATEtoYMM(reg, byte_order)) + value.SetBytes(m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes, reg_info->byte_size, byte_order); + else + return false; + } + return value.GetType() == RegisterValue::eTypeBytes; + } + return false; + } + + // Get pointer to m_fpr.xstate.fxsave variable and set the data from it. + assert (reg_info->byte_offset < sizeof(m_fpr)); + uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset; + switch (reg_info->byte_size) + { + case 2: + value.SetUInt16(*(uint16_t *)src); + return true; + case 4: + value.SetUInt32(*(uint32_t *)src); + return true; + case 8: + value.SetUInt64(*(uint64_t *)src); + return true; + default: + assert(false && "Unhandled data size."); + return false; + } +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &value) +{ + const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; + + if (IsGPR(reg)) + return WriteRegister(reg, value); + + if (IsFPR(reg, GetFPRType())) + { + if (reg_info->encoding == eEncodingVector) + { + if (reg >= m_reg_info.first_st && reg <= m_reg_info.last_st) + ::memcpy (m_fpr.xstate.fxsave.stmm[reg - m_reg_info.first_st].bytes, value.GetBytes(), value.GetByteSize()); + + if (reg >= m_reg_info.first_mm && reg <= m_reg_info.last_mm) + ::memcpy (m_fpr.xstate.fxsave.stmm[reg - m_reg_info.first_mm].bytes, value.GetBytes(), value.GetByteSize()); + + if (reg >= m_reg_info.first_xmm && reg <= m_reg_info.last_xmm) + ::memcpy (m_fpr.xstate.fxsave.xmm[reg - m_reg_info.first_xmm].bytes, value.GetBytes(), value.GetByteSize()); + + if (reg >= m_reg_info.first_ymm && reg <= m_reg_info.last_ymm) + { + if (GetFPRType() != eXSAVE) + return false; // the target processor does not support AVX + + // Store ymm register content, and split into the register halves in xmm.bytes and ymmh.bytes + ::memcpy (m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes, value.GetBytes(), value.GetByteSize()); + if (false == CopyYMMtoXSTATE(reg, GetByteOrder())) + return false; + } + } + else + { + // Get pointer to m_fpr.xstate.fxsave variable and set the data to it. + assert (reg_info->byte_offset < sizeof(m_fpr)); + uint8_t *dst = (uint8_t *)&m_fpr + reg_info->byte_offset; + switch (reg_info->byte_size) + { + case 2: + *(uint16_t *)dst = value.GetAsUInt16(); + break; + case 4: + *(uint32_t *)dst = value.GetAsUInt32(); + break; + case 8: + *(uint64_t *)dst = value.GetAsUInt64(); + break; + default: + assert(false && "Unhandled data size."); + return false; + } + } + + if (WriteFPR()) + { + if (IsAVX(reg)) + return CopyYMMtoXSTATE(reg, GetByteOrder()); + return true; + } + } + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::ReadAllRegisterValues(DataBufferSP &data_sp) +{ + bool success = false; + data_sp.reset (new DataBufferHeap (REG_CONTEXT_SIZE, 0)); + if (data_sp && ReadGPR () && ReadFPR ()) + { + uint8_t *dst = data_sp->GetBytes(); + success = dst != 0; + + if (success) + { + ::memcpy (dst, &m_gpr_x86_64, GetGPRSize()); + dst += GetGPRSize(); + if (GetFPRType() == eFXSAVE) + ::memcpy (dst, &m_fpr.xstate.fxsave, sizeof(m_fpr.xstate.fxsave)); + } + + if (GetFPRType() == eXSAVE) + { + ByteOrder byte_order = GetByteOrder(); + + // Assemble the YMM register content from the register halves. + for (uint32_t reg = m_reg_info.first_ymm; success && reg <= m_reg_info.last_ymm; ++reg) + success = CopyXSTATEtoYMM(reg, byte_order); + + if (success) + { + // Copy the extended register state including the assembled ymm registers. + ::memcpy (dst, &m_fpr, sizeof(m_fpr)); + } + } + } + return success; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::WriteAllRegisterValues(const DataBufferSP &data_sp) +{ + bool success = false; + if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) + { + uint8_t *src = data_sp->GetBytes(); + if (src) + { + ::memcpy (&m_gpr_x86_64, src, GetGPRSize()); + + if (WriteGPR()) + { + src += GetGPRSize(); + if (GetFPRType() == eFXSAVE) + ::memcpy (&m_fpr.xstate.fxsave, src, sizeof(m_fpr.xstate.fxsave)); + if (GetFPRType() == eXSAVE) + ::memcpy (&m_fpr.xstate.xsave, src, sizeof(m_fpr.xstate.xsave)); + + success = WriteFPR(); + if (success) + { + if (GetFPRType() == eXSAVE) + { + ByteOrder byte_order = GetByteOrder(); + + // Parse the YMM register content from the register halves. + for (uint32_t reg = m_reg_info.first_ymm; success && reg <= m_reg_info.last_ymm; ++reg) + success = CopyYMMtoXSTATE(reg, byte_order); + } + } + } + } + } + return success; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_x86_64::SetHardwareWatchpoint(addr_t addr, size_t size, + bool read, bool write) +{ + const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); + uint32_t hw_index; + + for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) + { + if (IsWatchpointVacant(hw_index)) + return SetHardwareWatchpointWithIndex(addr, size, + read, write, + hw_index); + } + + return LLDB_INVALID_INDEX32; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::ClearHardwareWatchpoint(uint32_t hw_index) +{ + if (hw_index < NumSupportedHardwareWatchpoints()) + { + RegisterValue current_dr7_bits; + + if (ReadRegister(m_reg_info.first_dr + 7, current_dr7_bits)) + { + uint64_t new_dr7_bits = current_dr7_bits.GetAsUInt64() & ~(3 << (2*hw_index)); + + if (WriteRegister(m_reg_info.first_dr + 7, RegisterValue(new_dr7_bits))) + return true; + } + } + + return false; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::HardwareSingleStep(bool enable) +{ + enum { TRACE_BIT = 0x100 }; + uint64_t rflags; + + if ((rflags = ReadRegisterAsUnsigned(m_reg_info.gpr_flags, -1UL)) == -1UL) + return false; + + if (enable) + { + if (rflags & TRACE_BIT) + return true; + + rflags |= TRACE_BIT; + } + else + { + if (!(rflags & TRACE_BIT)) + return false; + + rflags &= ~TRACE_BIT; + } + + return WriteRegisterFromUnsigned(m_reg_info.gpr_flags, rflags); +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::UpdateAfterBreakpoint() +{ + // PC points one byte past the int3 responsible for the breakpoint. + lldb::addr_t pc; + + if ((pc = GetPC()) == LLDB_INVALID_ADDRESS) + return false; + + SetPC(pc - 1); + return true; +} + +unsigned +RegisterContextPOSIXProcessMonitor_x86_64::GetRegisterIndexFromOffset(unsigned offset) +{ + unsigned reg; + for (reg = 0; reg < m_reg_info.num_registers; reg++) + { + if (GetRegisterInfo()[reg].byte_offset == offset) + break; + } + assert(reg < m_reg_info.num_registers && "Invalid register offset."); + return reg; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::IsWatchpointHit(uint32_t hw_index) +{ + bool is_hit = false; + + if (m_watchpoints_initialized == false) + { + // Reset the debug status and debug control registers + RegisterValue zero_bits = RegisterValue(uint64_t(0)); + if (!WriteRegister(m_reg_info.first_dr + 6, zero_bits) || !WriteRegister(m_reg_info.first_dr + 7, zero_bits)) + assert(false && "Could not initialize watchpoint registers"); + m_watchpoints_initialized = true; + } + + if (hw_index < NumSupportedHardwareWatchpoints()) + { + RegisterValue value; + + if (ReadRegister(m_reg_info.first_dr + 6, value)) + { + uint64_t val = value.GetAsUInt64(); + is_hit = val & (1 << hw_index); + } + } + + return is_hit; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::ClearWatchpointHits() +{ + return WriteRegister(m_reg_info.first_dr + 6, RegisterValue((uint64_t)0)); +} + +addr_t +RegisterContextPOSIXProcessMonitor_x86_64::GetWatchpointAddress(uint32_t hw_index) +{ + addr_t wp_monitor_addr = LLDB_INVALID_ADDRESS; + + if (hw_index < NumSupportedHardwareWatchpoints()) + { + if (!IsWatchpointVacant(hw_index)) + { + RegisterValue value; + + if (ReadRegister(m_reg_info.first_dr + hw_index, value)) + wp_monitor_addr = value.GetAsUInt64(); + } + } + + return wp_monitor_addr; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::IsWatchpointVacant(uint32_t hw_index) +{ + bool is_vacant = false; + RegisterValue value; + + assert(hw_index < NumSupportedHardwareWatchpoints()); + + if (m_watchpoints_initialized == false) + { + // Reset the debug status and debug control registers + RegisterValue zero_bits = RegisterValue(uint64_t(0)); + if (!WriteRegister(m_reg_info.first_dr + 6, zero_bits) || !WriteRegister(m_reg_info.first_dr + 7, zero_bits)) + assert(false && "Could not initialize watchpoint registers"); + m_watchpoints_initialized = true; + } + + if (ReadRegister(m_reg_info.first_dr + 7, value)) + { + uint64_t val = value.GetAsUInt64(); + is_vacant = (val & (3 << 2*hw_index)) == 0; + } + + return is_vacant; +} + +bool +RegisterContextPOSIXProcessMonitor_x86_64::SetHardwareWatchpointWithIndex(addr_t addr, size_t size, + bool read, bool write, + uint32_t hw_index) +{ + const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints(); + + if (num_hw_watchpoints == 0 || hw_index >= num_hw_watchpoints) + return false; + + if (!(size == 1 || size == 2 || size == 4 || size == 8)) + return false; + + if (read == false && write == false) + return false; + + if (!IsWatchpointVacant(hw_index)) + return false; + + // Set both dr7 (debug control register) and dri (debug address register). + + // dr7{7-0} encodes the local/global enable bits: + // global enable --. .-- local enable + // | | + // v v + // dr0 -> bits{1-0} + // dr1 -> bits{3-2} + // dr2 -> bits{5-4} + // dr3 -> bits{7-6} + // + // dr7{31-16} encodes the rw/len bits: + // b_x+3, b_x+2, b_x+1, b_x + // where bits{x+1, x} => rw + // 0b00: execute, 0b01: write, 0b11: read-or-write, + // 0b10: io read-or-write (unused) + // and bits{x+3, x+2} => len + // 0b00: 1-byte, 0b01: 2-byte, 0b11: 4-byte, 0b10: 8-byte + // + // dr0 -> bits{19-16} + // dr1 -> bits{23-20} + // dr2 -> bits{27-24} + // dr3 -> bits{31-28} + if (hw_index < num_hw_watchpoints) + { + RegisterValue current_dr7_bits; + + if (ReadRegister(m_reg_info.first_dr + 7, current_dr7_bits)) + { + uint64_t new_dr7_bits = current_dr7_bits.GetAsUInt64() | + (1 << (2*hw_index) | + size_and_rw_bits(size, read, write) << + (16+4*hw_index)); + + if (WriteRegister(m_reg_info.first_dr + hw_index, RegisterValue(addr)) && + WriteRegister(m_reg_info.first_dr + 7, RegisterValue(new_dr7_bits))) + return true; + } + } + + return false; +} + +uint32_t +RegisterContextPOSIXProcessMonitor_x86_64::NumSupportedHardwareWatchpoints() +{ + // Available debug address registers: dr0, dr1, dr2, dr3 + return 4; +} + diff --git a/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_x86.h b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_x86.h new file mode 100644 index 0000000..2afb195 --- /dev/null +++ b/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_x86.h @@ -0,0 +1,95 @@ +//===-- RegisterContextPOSIXProcessMonitor_x86.h ----------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_RegisterContextPOSIXProcessMonitor_x86_H_ +#define liblldb_RegisterContextPOSIXProcessMonitor_x86_H_ + +#include "Plugins/Process/Utility/RegisterContextPOSIX_x86.h" + +class RegisterContextPOSIXProcessMonitor_x86_64: + public RegisterContextPOSIX_x86, + public POSIXBreakpointProtocol +{ +public: + RegisterContextPOSIXProcessMonitor_x86_64(lldb_private::Thread &thread, + uint32_t concrete_frame_idx, + lldb_private::RegisterInfoInterface *register_info); + +protected: + bool + ReadGPR(); + + bool + ReadFPR(); + + bool + WriteGPR(); + + bool + WriteFPR(); + + // lldb_private::RegisterContext + bool + ReadRegister(const unsigned reg, lldb_private::RegisterValue &value); + + bool + WriteRegister(const unsigned reg, const lldb_private::RegisterValue &value); + + bool + ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value); + + bool + WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value); + + bool + ReadAllRegisterValues(lldb::DataBufferSP &data_sp); + + bool + WriteAllRegisterValues(const lldb::DataBufferSP &data_sp); + + uint32_t + SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read, bool write); + + bool + ClearHardwareWatchpoint(uint32_t hw_index); + + bool + HardwareSingleStep(bool enable); + + // POSIXBreakpointProtocol + bool + UpdateAfterBreakpoint(); + + unsigned + GetRegisterIndexFromOffset(unsigned offset); + + bool + IsWatchpointHit(uint32_t hw_index); + + bool + ClearWatchpointHits(); + + lldb::addr_t + GetWatchpointAddress(uint32_t hw_index); + + bool + IsWatchpointVacant(uint32_t hw_index); + + bool + SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size, bool read, bool write, uint32_t hw_index); + + uint32_t + NumSupportedHardwareWatchpoints(); + +private: + ProcessMonitor & + GetMonitor(); +}; + +#endif |
