This looks to be broken on Windows:
Severity Code Description Project File Line Suppression
State
Error C2555 'lldb_private::HostProcessWindows::StartMonitoring': overriding
virtual function return type differs and is not covariant from
'lldb_private::HostNativeProcessBase::StartMonitoring'
lldbPluginProcessWindowsCommon
C:\p\llvm\llvm\tools\lldb\include\lldb\Host\windows\HostProcessWindows.h
33
Error C2664 'llvm::Expected<lldb_private::HostThread>
lldb_private::ThreadLauncher::LaunchThread(llvm::StringRef,lldb::thread_func_t,lldb::thread_arg_t,size_t)':
cannot convert argument 4 from 'lldb_private::Status *' to 'size_t'
lldbPluginProcessWindowsCommon
C:\p\llvm\llvm\tools\lldb\source\Plugins\Process\Windows\Common\DebuggerThread.cpp
68
Error C2664 'llvm::Expected<lldb_private::HostThread>
lldb_private::ThreadLauncher::LaunchThread(llvm::StringRef,lldb::thread_func_t,lldb::thread_arg_t,size_t)':
cannot convert argument 4 from 'lldb_private::Status *' to 'size_t'
lldbPluginProcessWindowsCommon
C:\p\llvm\llvm\tools\lldb\source\Plugins\Process\Windows\Common\DebuggerThread.cpp
85
On Mon, Jul 8, 2019, at 09:06, Fangrui Song via lldb-commits wrote:
> Author: maskray
> Date: Mon Jul 8 00:07:05 2019
> New Revision: 365295
>
> URL: http://llvm.org/viewvc/llvm-project?rev=365295&view=rev
> Log:
> Change LaunchThread interface to return an Expected for non-Apple-non-Windows
>
> Fixes Linux build errors after D64163/r365226
>
> Modified:
> lldb/trunk/include/lldb/Host/Host.h
> lldb/trunk/include/lldb/Host/HostNativeProcessBase.h
> lldb/trunk/include/lldb/Host/HostProcess.h
> lldb/trunk/include/lldb/Host/posix/HostProcessPosix.h
> lldb/trunk/source/Host/common/Host.cpp
> lldb/trunk/source/Host/common/HostProcess.cpp
> lldb/trunk/source/Host/common/MonitoringProcessLauncher.cpp
> lldb/trunk/source/Host/common/ProcessLaunchInfo.cpp
> lldb/trunk/source/Host/posix/HostProcessPosix.cpp
>
> Modified: lldb/trunk/include/lldb/Host/Host.h
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/include/lldb/Host/Host.h?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/include/lldb/Host/Host.h (original)
> +++ lldb/trunk/include/lldb/Host/Host.h Mon Jul 8 00:07:05 2019
> @@ -99,7 +99,7 @@ public:
> /// was spawned to monitor \a pid.
> ///
> /// \see static void Host::StopMonitoringChildProcess (uint32_t)
> - static HostThread
> + static llvm::Expected<HostThread>
> StartMonitoringChildProcess(const MonitorChildProcessCallback
> &callback,
> lldb::pid_t pid, bool monitor_signals);
>
>
> Modified: lldb/trunk/include/lldb/Host/HostNativeProcessBase.h
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/include/lldb/Host/HostNativeProcessBase.h?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/include/lldb/Host/HostNativeProcessBase.h (original)
> +++ lldb/trunk/include/lldb/Host/HostNativeProcessBase.h Mon Jul 8
> 00:07:05 2019
> @@ -35,7 +35,7 @@ public:
>
> lldb::process_t GetSystemHandle() const { return m_process; }
>
> - virtual HostThread
> + virtual llvm::Expected<HostThread>
> StartMonitoring(const Host::MonitorChildProcessCallback &callback,
> bool monitor_signals) = 0;
>
>
> Modified: lldb/trunk/include/lldb/Host/HostProcess.h
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/include/lldb/Host/HostProcess.h?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/include/lldb/Host/HostProcess.h (original)
> +++ lldb/trunk/include/lldb/Host/HostProcess.h Mon Jul 8 00:07:05 2019
> @@ -43,8 +43,9 @@ public:
> lldb::pid_t GetProcessId() const;
> bool IsRunning() const;
>
> - HostThread StartMonitoring(const Host::MonitorChildProcessCallback
> &callback,
> - bool monitor_signals);
> + llvm::Expected<HostThread>
> + StartMonitoring(const Host::MonitorChildProcessCallback &callback,
> + bool monitor_signals);
>
> HostNativeProcessBase &GetNativeProcess();
> const HostNativeProcessBase &GetNativeProcess() const;
>
> Modified: lldb/trunk/include/lldb/Host/posix/HostProcessPosix.h
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/include/lldb/Host/posix/HostProcessPosix.h?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/include/lldb/Host/posix/HostProcessPosix.h (original)
> +++ lldb/trunk/include/lldb/Host/posix/HostProcessPosix.h Mon Jul 8
> 00:07:05 2019
> @@ -32,8 +32,9 @@ public:
> lldb::pid_t GetProcessId() const override;
> bool IsRunning() const override;
>
> - HostThread StartMonitoring(const Host::MonitorChildProcessCallback
> &callback,
> - bool monitor_signals) override;
> + llvm::Expected<HostThread>
> + StartMonitoring(const Host::MonitorChildProcessCallback &callback,
> + bool monitor_signals) override;
> };
>
> } // namespace lldb_private
>
> Modified: lldb/trunk/source/Host/common/Host.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Host/common/Host.cpp?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/source/Host/common/Host.cpp (original)
> +++ lldb/trunk/source/Host/common/Host.cpp Mon Jul 8 00:07:05 2019
> @@ -99,7 +99,7 @@ struct MonitorInfo {
>
> static thread_result_t MonitorChildProcessThreadFunction(void *arg);
>
> -HostThread Host::StartMonitoringChildProcess(
> +llvm::Expected<HostThread> Host::StartMonitoringChildProcess(
> const Host::MonitorChildProcessCallback &callback, lldb::pid_t pid,
> bool monitor_signals) {
> MonitorInfo *info_ptr = new MonitorInfo();
> @@ -112,7 +112,7 @@ HostThread Host::StartMonitoringChildPro
> ::snprintf(thread_name, sizeof(thread_name),
> "<lldb.host.wait4(pid=%" PRIu64 ")>", pid);
> return ThreadLauncher::LaunchThread(
> - thread_name, MonitorChildProcessThreadFunction, info_ptr, nullptr);
> + thread_name, MonitorChildProcessThreadFunction, info_ptr, 0);
> }
>
> #ifndef __linux__
>
> Modified: lldb/trunk/source/Host/common/HostProcess.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Host/common/HostProcess.cpp?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/source/Host/common/HostProcess.cpp (original)
> +++ lldb/trunk/source/Host/common/HostProcess.cpp Mon Jul 8 00:07:05
> 2019
> @@ -32,7 +32,7 @@ lldb::pid_t HostProcess::GetProcessId()
>
> bool HostProcess::IsRunning() const { return m_native_process->IsRunning(); }
>
> -HostThread
> +llvm::Expected<HostThread>
> HostProcess::StartMonitoring(const Host::MonitorChildProcessCallback
> &callback,
> bool monitor_signals) {
> return m_native_process->StartMonitoring(callback, monitor_signals);
>
> Modified: lldb/trunk/source/Host/common/MonitoringProcessLauncher.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Host/common/MonitoringProcessLauncher.cpp?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/source/Host/common/MonitoringProcessLauncher.cpp
> (original)
> +++ lldb/trunk/source/Host/common/MonitoringProcessLauncher.cpp Mon Jul
> 8 00:07:05 2019
> @@ -53,8 +53,12 @@ MonitoringProcessLauncher::LaunchProcess
> Log
> *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
>
> assert(launch_info.GetMonitorProcessCallback());
> - process.StartMonitoring(launch_info.GetMonitorProcessCallback(),
> - launch_info.GetMonitorSignals());
> + llvm::Expected<HostThread> maybe_thread =
> +
> process.StartMonitoring(launch_info.GetMonitorProcessCallback(),
> + launch_info.GetMonitorSignals());
> + if (!maybe_thread)
> + error.SetErrorStringWithFormatv("failed to launch host thread:
> {}",
> +
> llvm::toString(maybe_thread.takeError()));
> if (log)
> log->PutCString("started monitoring child process.");
> } else {
>
> Modified: lldb/trunk/source/Host/common/ProcessLaunchInfo.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Host/common/ProcessLaunchInfo.cpp?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/source/Host/common/ProcessLaunchInfo.cpp (original)
> +++ lldb/trunk/source/Host/common/ProcessLaunchInfo.cpp Mon Jul 8
> 00:07:05 2019
> @@ -188,8 +188,13 @@ bool ProcessLaunchInfo::NoOpMonitorCallb
>
> bool ProcessLaunchInfo::MonitorProcess() const {
> if (m_monitor_callback && ProcessIDIsValid()) {
> + llvm::Expected<HostThread> maybe_thread =
> Host::StartMonitoringChildProcess(m_monitor_callback, GetProcessID(),
> m_monitor_signals);
> + if (!maybe_thread)
> + LLDB_LOG(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST),
> + "failed to launch host thread: {}",
> + llvm::toString(maybe_thread.takeError()));
> return true;
> }
> return false;
>
> Modified: lldb/trunk/source/Host/posix/HostProcessPosix.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Host/posix/HostProcessPosix.cpp?rev=365295&r1=365294&r2=365295&view=diff
> ==============================================================================
> --- lldb/trunk/source/Host/posix/HostProcessPosix.cpp (original)
> +++ lldb/trunk/source/Host/posix/HostProcessPosix.cpp Mon Jul 8
> 00:07:05 2019
> @@ -87,7 +87,7 @@ bool HostProcessPosix::IsRunning() const
> return error.Success();
> }
>
> -HostThread HostProcessPosix::StartMonitoring(
> +llvm::Expected<HostThread> HostProcessPosix::StartMonitoring(
> const Host::MonitorChildProcessCallback &callback, bool monitor_signals)
> {
> return Host::StartMonitoringChildProcess(callback, m_process,
> monitor_signals);
>
>
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> lldb-commits@lists.llvm.org
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>
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