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//===-- DebuggerThread.DebuggerThread --------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DebuggerThread.h"
#include "ExceptionRecord.h"
#include "IDebugDelegate.h"
#include "ProcessMessages.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/Log.h"
#include "lldb/Host/Predicate.h"
#include "lldb/Host/ThisThread.h"
#include "lldb/Host/ThreadLauncher.h"
#include "lldb/Host/windows/HostProcessWindows.h"
#include "lldb/Host/windows/HostThreadWindows.h"
#include "lldb/Host/windows/ProcessLauncherWindows.h"
#include "lldb/Target/ProcessLaunchInfo.h"
#include "llvm/Support/raw_ostream.h"
using namespace lldb;
using namespace lldb_private;
namespace
{
struct DebugLaunchContext
{
DebugLaunchContext(DebuggerThread *thread, const ProcessLaunchInfo &launch_info)
: m_thread(thread)
, m_launch_info(launch_info)
{
}
DebuggerThread *m_thread;
ProcessLaunchInfo m_launch_info;
};
}
DebuggerThread::DebuggerThread(DebugDelegateSP debug_delegate)
: m_debug_delegate(debug_delegate)
, m_image_file(nullptr)
{
}
DebuggerThread::~DebuggerThread()
{
}
Error
DebuggerThread::DebugLaunch(const ProcessLaunchInfo &launch_info)
{
Error error;
DebugLaunchContext *context = new DebugLaunchContext(this, launch_info);
HostThread slave_thread(ThreadLauncher::LaunchThread("lldb.plugin.process-windows.slave[?]", DebuggerThreadRoutine, context, &error));
return error;
}
lldb::thread_result_t
DebuggerThread::DebuggerThreadRoutine(void *data)
{
DebugLaunchContext *context = static_cast<DebugLaunchContext *>(data);
lldb::thread_result_t result = context->m_thread->DebuggerThreadRoutine(context->m_launch_info);
delete context;
return result;
}
lldb::thread_result_t
DebuggerThread::DebuggerThreadRoutine(const ProcessLaunchInfo &launch_info)
{
// Grab a shared_ptr reference to this so that we know it won't get deleted until after the
// thread routine has exited.
std::shared_ptr<DebuggerThread> this_ref(shared_from_this());
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
Error error;
ProcessLauncherWindows launcher;
HostProcess process(launcher.LaunchProcess(launch_info, error));
// If we couldn't create the process, notify waiters immediately. Otherwise enter the debug
// loop and wait until we get the create process debug notification. Note that if the process
// was created successfully, we can throw away the process handle we got from CreateProcess
// because Windows will give us another (potentially more useful?) handle when it sends us the
// CREATE_PROCESS_DEBUG_EVENT.
if (error.Success())
DebugLoop();
else
{
ProcessMessageDebuggerError message(m_process, error, 0);
m_debug_delegate->OnDebuggerError(message);
}
return 0;
}
void
DebuggerThread::ContinueAsyncException(ExceptionResult result)
{
m_exception.SetValue(result, eBroadcastAlways);
}
void
DebuggerThread::DebugLoop()
{
DEBUG_EVENT dbe = {0};
bool exit = false;
while (!exit && WaitForDebugEvent(&dbe, INFINITE))
{
DWORD continue_status = DBG_CONTINUE;
switch (dbe.dwDebugEventCode)
{
case EXCEPTION_DEBUG_EVENT:
{
ExceptionResult status = HandleExceptionEvent(dbe.u.Exception, dbe.dwThreadId);
m_exception.SetValue(status, eBroadcastNever);
m_exception.WaitForValueNotEqualTo(ExceptionResult::WillHandle, status);
if (status == ExceptionResult::Handled)
continue_status = DBG_CONTINUE;
else if (status == ExceptionResult::NotHandled)
continue_status = DBG_EXCEPTION_NOT_HANDLED;
break;
}
case CREATE_THREAD_DEBUG_EVENT:
continue_status = HandleCreateThreadEvent(dbe.u.CreateThread, dbe.dwThreadId);
break;
case CREATE_PROCESS_DEBUG_EVENT:
continue_status = HandleCreateProcessEvent(dbe.u.CreateProcessInfo, dbe.dwThreadId);
break;
case EXIT_THREAD_DEBUG_EVENT:
continue_status = HandleExitThreadEvent(dbe.u.ExitThread, dbe.dwThreadId);
break;
case EXIT_PROCESS_DEBUG_EVENT:
continue_status = HandleExitProcessEvent(dbe.u.ExitProcess, dbe.dwThreadId);
exit = true;
break;
case LOAD_DLL_DEBUG_EVENT:
continue_status = HandleLoadDllEvent(dbe.u.LoadDll, dbe.dwThreadId);
break;
case UNLOAD_DLL_DEBUG_EVENT:
continue_status = HandleUnloadDllEvent(dbe.u.UnloadDll, dbe.dwThreadId);
break;
case OUTPUT_DEBUG_STRING_EVENT:
continue_status = HandleODSEvent(dbe.u.DebugString, dbe.dwThreadId);
break;
case RIP_EVENT:
continue_status = HandleRipEvent(dbe.u.RipInfo, dbe.dwThreadId);
if (dbe.u.RipInfo.dwType == SLE_ERROR)
exit = true;
break;
}
::ContinueDebugEvent(dbe.dwProcessId, dbe.dwThreadId, continue_status);
}
}
ExceptionResult
DebuggerThread::HandleExceptionEvent(const EXCEPTION_DEBUG_INFO &info, DWORD thread_id)
{
bool first_chance = (info.dwFirstChance != 0);
ProcessMessageException message(m_process, ExceptionRecord(info.ExceptionRecord), first_chance);
return m_debug_delegate->OnDebugException(message);
}
DWORD
DebuggerThread::HandleCreateThreadEvent(const CREATE_THREAD_DEBUG_INFO &info, DWORD thread_id)
{
return DBG_CONTINUE;
}
DWORD
DebuggerThread::HandleCreateProcessEvent(const CREATE_PROCESS_DEBUG_INFO &info, DWORD thread_id)
{
std::string thread_name;
llvm::raw_string_ostream name_stream(thread_name);
name_stream << "lldb.plugin.process-windows.slave[" << m_process.GetProcessId() << "]";
name_stream.flush();
ThisThread::SetName(thread_name.c_str());
// info.hProcess and info.hThread are closed automatically by Windows when
// EXIT_PROCESS_DEBUG_EVENT is received.
m_process = HostProcess(info.hProcess);
((HostProcessWindows &)m_process.GetNativeProcess()).SetOwnsHandle(false);
m_main_thread = HostThread(info.hThread);
((HostThreadWindows &)m_main_thread.GetNativeThread()).SetOwnsHandle(false);
m_image_file = info.hFile;
ProcessMessageDebuggerConnected message(m_process);
m_debug_delegate->OnDebuggerConnected(message);
return DBG_CONTINUE;
}
DWORD
DebuggerThread::HandleExitThreadEvent(const EXIT_THREAD_DEBUG_INFO &info, DWORD thread_id)
{
return DBG_CONTINUE;
}
DWORD
DebuggerThread::HandleExitProcessEvent(const EXIT_PROCESS_DEBUG_INFO &info, DWORD thread_id)
{
ProcessMessageExitProcess message(m_process, info.dwExitCode);
m_debug_delegate->OnExitProcess(message);
m_process = HostProcess();
m_main_thread = HostThread();
::CloseHandle(m_image_file);
m_image_file = nullptr;
return DBG_CONTINUE;
}
DWORD
DebuggerThread::HandleLoadDllEvent(const LOAD_DLL_DEBUG_INFO &info, DWORD thread_id)
{
// Windows does not automatically close info.hFile when the DLL is unloaded.
::CloseHandle(info.hFile);
return DBG_CONTINUE;
}
DWORD
DebuggerThread::HandleUnloadDllEvent(const UNLOAD_DLL_DEBUG_INFO &info, DWORD thread_id)
{
return DBG_CONTINUE;
}
DWORD
DebuggerThread::HandleODSEvent(const OUTPUT_DEBUG_STRING_INFO &info, DWORD thread_id)
{
return DBG_CONTINUE;
}
DWORD
DebuggerThread::HandleRipEvent(const RIP_INFO &info, DWORD thread_id)
{
Error error(info.dwError, eErrorTypeWin32);
ProcessMessageDebuggerError message(m_process, error, info.dwType);
m_debug_delegate->OnDebuggerError(message);
return DBG_CONTINUE;
}
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