forked from OSchip/llvm-project
356 lines
8.9 KiB
C++
356 lines
8.9 KiB
C++
//===-- POSIXThread.cpp -----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// C Includes
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#include <errno.h>
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Core/Debugger.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/StopInfo.h"
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#include "lldb/Target/Target.h"
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#include "POSIXStopInfo.h"
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#include "POSIXThread.h"
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#include "ProcessPOSIX.h"
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#include "ProcessPOSIXLog.h"
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#include "ProcessMonitor.h"
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#include "RegisterContext_i386.h"
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#include "RegisterContext_x86_64.h"
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#include "RegisterContextPOSIX.h"
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#include "UnwindLLDB.h"
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using namespace lldb;
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using namespace lldb_private;
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POSIXThread::POSIXThread(ProcessSP &process, lldb::tid_t tid)
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: Thread(process, tid),
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m_frame_ap(0)
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{
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LogSP log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));
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if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
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log->Printf ("POSIXThread::%s (tid = %i)", __FUNCTION__, tid);
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}
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POSIXThread::~POSIXThread()
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{
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DestroyThread();
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}
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ProcessMonitor &
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POSIXThread::GetMonitor()
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{
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ProcessSP base = GetProcess();
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ProcessPOSIX &process = static_cast<ProcessPOSIX&>(*base);
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return process.GetMonitor();
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}
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void
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POSIXThread::RefreshStateAfterStop()
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{
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LogSP log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));
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if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
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log->Printf ("POSIXThread::%s ()", __FUNCTION__);
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// Let all threads recover from stopping and do any clean up based
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// on the previous thread state (if any).
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ProcessSP base = GetProcess();
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ProcessPOSIX &process = static_cast<ProcessPOSIX&>(*base);
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process.GetThreadList().RefreshStateAfterStop();
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}
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const char *
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POSIXThread::GetInfo()
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{
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return NULL;
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}
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lldb::RegisterContextSP
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POSIXThread::GetRegisterContext()
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{
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if (!m_reg_context_sp)
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{
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ArchSpec arch = Host::GetArchitecture();
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switch (arch.GetCore())
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{
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default:
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assert(false && "CPU type not supported!");
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break;
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case ArchSpec::eCore_x86_32_i386:
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case ArchSpec::eCore_x86_32_i486:
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case ArchSpec::eCore_x86_32_i486sx:
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m_reg_context_sp.reset(new RegisterContext_i386(*this, 0));
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break;
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case ArchSpec::eCore_x86_64_x86_64:
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m_reg_context_sp.reset(new RegisterContext_x86_64(*this, 0));
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break;
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}
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}
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return m_reg_context_sp;
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}
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lldb::RegisterContextSP
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POSIXThread::CreateRegisterContextForFrame(lldb_private::StackFrame *frame)
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{
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lldb::RegisterContextSP reg_ctx_sp;
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uint32_t concrete_frame_idx = 0;
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LogSP log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));
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if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
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log->Printf ("POSIXThread::%s ()", __FUNCTION__);
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if (frame)
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concrete_frame_idx = frame->GetConcreteFrameIndex();
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if (concrete_frame_idx == 0)
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reg_ctx_sp = GetRegisterContext();
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else
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{
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assert(GetUnwinder());
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reg_ctx_sp = GetUnwinder()->CreateRegisterContextForFrame(frame);
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}
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return reg_ctx_sp;
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}
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lldb::StopInfoSP
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POSIXThread::GetPrivateStopReason()
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{
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return m_stop_info;
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}
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Unwind *
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POSIXThread::GetUnwinder()
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{
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if (m_unwinder_ap.get() == NULL)
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m_unwinder_ap.reset(new UnwindLLDB(*this));
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return m_unwinder_ap.get();
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}
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bool
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POSIXThread::WillResume(lldb::StateType resume_state)
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{
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SetResumeState(resume_state);
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ClearStackFrames();
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if (m_unwinder_ap.get())
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m_unwinder_ap->Clear();
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return Thread::WillResume(resume_state);
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}
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bool
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POSIXThread::Resume()
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{
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lldb::StateType resume_state = GetResumeState();
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ProcessMonitor &monitor = GetMonitor();
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bool status;
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LogSP log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));
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if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
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log->Printf ("POSIXThread::%s ()", __FUNCTION__);
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switch (resume_state)
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{
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default:
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assert(false && "Unexpected state for resume!");
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status = false;
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break;
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case lldb::eStateRunning:
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SetState(resume_state);
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status = monitor.Resume(GetID(), GetResumeSignal());
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break;
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case lldb::eStateStepping:
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SetState(resume_state);
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status = monitor.SingleStep(GetID(), GetResumeSignal());
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break;
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}
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return status;
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}
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void
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POSIXThread::Notify(const ProcessMessage &message)
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{
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LogSP log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));
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if (log)
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log->Printf ("POSIXThread::%s () message kind = '%s'", __FUNCTION__, message.PrintKind());
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switch (message.GetKind())
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{
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default:
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assert(false && "Unexpected message kind!");
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break;
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case ProcessMessage::eLimboMessage:
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LimboNotify(message);
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break;
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case ProcessMessage::eSignalMessage:
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SignalNotify(message);
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break;
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case ProcessMessage::eSignalDeliveredMessage:
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SignalDeliveredNotify(message);
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break;
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case ProcessMessage::eTraceMessage:
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TraceNotify(message);
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break;
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case ProcessMessage::eBreakpointMessage:
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BreakNotify(message);
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break;
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case ProcessMessage::eCrashMessage:
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CrashNotify(message);
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break;
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}
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}
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void
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POSIXThread::BreakNotify(const ProcessMessage &message)
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{
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bool status;
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LogSP log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));
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assert(GetRegisterContext());
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status = GetRegisterContextPOSIX()->UpdateAfterBreakpoint();
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assert(status && "Breakpoint update failed!");
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// With our register state restored, resolve the breakpoint object
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// corresponding to our current PC.
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assert(GetRegisterContext());
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lldb::addr_t pc = GetRegisterContext()->GetPC();
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if (log)
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log->Printf ("POSIXThread::%s () PC=0x%8.8llx", __FUNCTION__, pc);
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lldb::BreakpointSiteSP bp_site(GetProcess()->GetBreakpointSiteList().FindByAddress(pc));
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assert(bp_site);
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lldb::break_id_t bp_id = bp_site->GetID();
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assert(bp_site && bp_site->ValidForThisThread(this));
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m_breakpoint = bp_site;
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m_stop_info = StopInfo::CreateStopReasonWithBreakpointSiteID(*this, bp_id);
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}
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void
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POSIXThread::TraceNotify(const ProcessMessage &message)
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{
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m_stop_info = StopInfo::CreateStopReasonToTrace(*this);
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}
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void
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POSIXThread::LimboNotify(const ProcessMessage &message)
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{
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m_stop_info = lldb::StopInfoSP(new POSIXLimboStopInfo(*this));
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}
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void
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POSIXThread::SignalNotify(const ProcessMessage &message)
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{
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int signo = message.GetSignal();
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m_stop_info = StopInfo::CreateStopReasonWithSignal(*this, signo);
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SetResumeSignal(signo);
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}
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void
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POSIXThread::SignalDeliveredNotify(const ProcessMessage &message)
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{
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int signo = message.GetSignal();
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// Just treat debugger generated signal events like breakpoints for now.
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m_stop_info = StopInfo::CreateStopReasonToTrace(*this);
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SetResumeSignal(signo);
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}
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void
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POSIXThread::CrashNotify(const ProcessMessage &message)
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{
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int signo = message.GetSignal();
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assert(message.GetKind() == ProcessMessage::eCrashMessage);
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LogSP log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));
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if (log)
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log->Printf ("POSIXThread::%s () signo = %i, reason = '%s'", __FUNCTION__, signo, message.PrintCrashReason());
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m_stop_info = lldb::StopInfoSP(new POSIXCrashStopInfo(
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*this, signo, message.GetCrashReason()));
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SetResumeSignal(signo);
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}
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unsigned
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POSIXThread::GetRegisterIndexFromOffset(unsigned offset)
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{
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unsigned reg;
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ArchSpec arch = Host::GetArchitecture();
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switch (arch.GetCore())
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{
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default:
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assert(false && "CPU type not supported!");
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break;
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case ArchSpec::eCore_x86_32_i386:
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case ArchSpec::eCore_x86_32_i486:
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case ArchSpec::eCore_x86_32_i486sx:
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reg = RegisterContext_i386::GetRegisterIndexFromOffset(offset);
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break;
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case ArchSpec::eCore_x86_64_x86_64:
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reg = RegisterContext_x86_64::GetRegisterIndexFromOffset(offset);
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break;
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}
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return reg;
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}
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const char *
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POSIXThread::GetRegisterName(unsigned reg)
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{
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const char * name;
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ArchSpec arch = Host::GetArchitecture();
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switch (arch.GetCore())
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{
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default:
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assert(false && "CPU type not supported!");
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break;
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case ArchSpec::eCore_x86_32_i386:
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case ArchSpec::eCore_x86_32_i486:
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case ArchSpec::eCore_x86_32_i486sx:
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name = RegisterContext_i386::GetRegisterName(reg);
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break;
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case ArchSpec::eCore_x86_64_x86_64:
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name = RegisterContext_x86_64::GetRegisterName(reg);
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break;
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}
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return name;
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}
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const char *
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POSIXThread::GetRegisterNameFromOffset(unsigned offset)
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{
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return GetRegisterName(GetRegisterIndexFromOffset(offset));
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}
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