/// <summary>
/// Start a debuggee under a native debugger returning a sos runner instance.
/// </summary>
/// <param name="config">test configuration</param>
/// <param name="output">output instance</param>
/// <param name="testName">name of test</param>
/// <param name="debuggeeName">debuggee name</param>
/// <param name="debuggeeArguments">optional args to pass to debuggee</param>
/// <param name="options">dump options</param>
/// <returns>sos runner instance</returns>
public static async Task <SOSRunner> StartDebugger(TestConfiguration config, ITestOutputHelper output, string testName, string debuggeeName,
string debuggeeArguments = null, Options options = Options.None)
{
TestRunner.OutputHelper outputHelper = null;
SOSRunner sosRunner = null;
// Figure out which native debugger to use
NativeDebugger debugger = GetNativeDebuggerToUse(config, options);
try
{
// Setup the logging from the options in the config file
outputHelper = TestRunner.ConfigureLogging(config, output, testName);
// Restore and build the debuggee.
DebuggeeConfiguration debuggeeConfig = await DebuggeeCompiler.Execute(config, debuggeeName, outputHelper);
outputHelper.WriteLine("SOSRunner processing {0}", testName);
outputHelper.WriteLine("{");
var variables = GenerateVariables(config, debuggeeConfig, options);
var scriptLogger = new ScriptLogger(debugger, outputHelper.IndentedOutput);
if (options == Options.LoadDump || options == Options.LoadDumpWithDotNetDump)
{
if (!variables.TryGetValue("%DUMP_NAME%", out string dumpName) || !File.Exists(dumpName))
{
throw new FileNotFoundException($"Dump file does not exist: {dumpName ?? ""}");
}
}
// Get the full debuggee launch command line (includes the host if required)
var debuggeeCommandLine = new StringBuilder();
if (!string.IsNullOrWhiteSpace(config.HostExe))
{
debuggeeCommandLine.Append(config.HostExe);
debuggeeCommandLine.Append(" ");
if (!string.IsNullOrWhiteSpace(config.HostArgs))
{
debuggeeCommandLine.Append(config.HostArgs);
debuggeeCommandLine.Append(" ");
}
}
debuggeeCommandLine.Append(debuggeeConfig.BinaryExePath);
if (!string.IsNullOrWhiteSpace(debuggeeArguments))
{
debuggeeCommandLine.Append(" ");
debuggeeCommandLine.Append(debuggeeArguments);
}
// Get the native debugger path
string debuggerPath = GetNativeDebuggerPath(debugger, config);
if (string.IsNullOrWhiteSpace(debuggerPath) || !File.Exists(debuggerPath))
{
throw new FileNotFoundException($"Native debugger path not set or does not exist: {debuggerPath}");
}
// Get the debugger arguments and commands to run initially
List <string> initialCommands = new List <string>();
var arguments = new StringBuilder();
switch (debugger)
{
case NativeDebugger.Cdb:
string helperExtension = config.CDBHelperExtension();
if (string.IsNullOrWhiteSpace(helperExtension) || !File.Exists(helperExtension))
{
throw new ArgumentException($"CDB helper script path not set or does not exist: {helperExtension}");
}
arguments.AppendFormat(@"-c "".load {0}""", helperExtension);
if (options == Options.LoadDump)
{
arguments.Append(" -z %DUMP_NAME%");
}
else
{
arguments.AppendFormat(" -Gsins {0}", debuggeeCommandLine);
// disable stopping on integer divide-by-zero and integer overflow exceptions
initialCommands.Add("sxd dz");
initialCommands.Add("sxd iov");
}
initialCommands.Add(".sympath %DEBUG_ROOT%");
initialCommands.Add(".extpath " + Path.GetDirectoryName(config.SOSPath()));
// Add the path to runtime so cdb/sos can find mscordbi.
string runtimeSymbolsPath = config.RuntimeSymbolsPath;
if (runtimeSymbolsPath != null)
{
initialCommands.Add(".sympath+ " + runtimeSymbolsPath);
}
// Turn off warnings that can happen in the middle of a command's output
initialCommands.Add(".outmask- 4");
break;
case NativeDebugger.Lldb:
// Get the lldb python script file path necessary to capture the output of commands
// by printing a prompt after all the command output is printed.
string lldbHelperScript = config.LLDBHelperScript();
if (string.IsNullOrWhiteSpace(lldbHelperScript) || !File.Exists(lldbHelperScript))
{
throw new ArgumentException("LLDB helper script path not set or does not exist: " + lldbHelperScript);
}
arguments.AppendFormat(@"--no-lldbinit -o ""settings set interpreter.prompt-on-quit false"" -o ""command script import {0}"" -o ""version""", lldbHelperScript);
// Load the dump or launch the debuggee process
if (options == Options.LoadDump)
{
initialCommands.Add($@"target create --core ""%DUMP_NAME%"" ""{config.HostExe}""");
}
else
{
var sb = new StringBuilder("settings set -- target.run-args");
if (!string.IsNullOrWhiteSpace(config.HostArgs))
{
string[] args = ReplaceVariables(variables, config.HostArgs).Trim().Split(' ');
foreach (string arg in args)
{
sb.AppendFormat(@" ""{0}""", arg);
}
}
sb.AppendFormat(@" ""{0}""", debuggeeConfig.BinaryExePath);
if (!string.IsNullOrWhiteSpace(debuggeeArguments))
{
string[] args = ReplaceVariables(variables, debuggeeArguments).Trim().Split(' ');
foreach (string arg in args)
{
sb.AppendFormat(@" ""{0}""", arg);
}
}
initialCommands.Add($@"target create ""{config.HostExe}""");
initialCommands.Add(sb.ToString());
initialCommands.Add("process launch -s");
// .NET Core 1.1 or less don't catch stack overflow and abort so need to catch SIGSEGV
if (config.StackOverflowSIGSEGV)
{
initialCommands.Add("process handle -s true -n true -p true SIGSEGV");
}
else
{
initialCommands.Add("process handle -s false -n false -p true SIGSEGV");
}
initialCommands.Add("process handle -s false -n false -p true SIGFPE");
initialCommands.Add("process handle -s true -n true -p true SIGABRT");
}
break;
case NativeDebugger.Gdb:
if (options == Options.LoadDump || options == Options.LoadDumpWithDotNetDump)
{
throw new ArgumentException("GDB not meant for loading core dumps");
}
arguments.AppendFormat("--args {0}", debuggeeCommandLine);
// .NET Core 1.1 or less don't catch stack overflow and abort so need to catch SIGSEGV
if (config.StackOverflowSIGSEGV)
{
initialCommands.Add("handle SIGSEGV stop print");
}
else
{
initialCommands.Add("handle SIGSEGV nostop noprint");
}
initialCommands.Add("handle SIGFPE nostop noprint");
initialCommands.Add("handle SIGABRT stop print");
initialCommands.Add("set startup-with-shell off");
initialCommands.Add("set use-coredump-filter on");
initialCommands.Add("run");
break;
case NativeDebugger.DotNetDump:
if (options != Options.LoadDumpWithDotNetDump)
{
throw new ArgumentException($"{options} not supported for dotnet-dump testing");
}
if (string.IsNullOrWhiteSpace(config.HostExe))
{
throw new ArgumentException("No HostExe in configuration");
}
arguments.Append(debuggerPath);
arguments.Append(@" analyze %DUMP_NAME%");
debuggerPath = config.HostExe;
break;
}
// Create the native debugger process running
ProcessRunner processRunner = new ProcessRunner(debuggerPath, ReplaceVariables(variables, arguments.ToString())).
WithLog(scriptLogger).
WithTimeout(TimeSpan.FromMinutes(10));
// Create the sos runner instance
sosRunner = new SOSRunner(debugger, config, outputHelper, variables, scriptLogger, processRunner, options == Options.LoadDump || options == Options.LoadDumpWithDotNetDump);
// Start the native debugger
processRunner.Start();
// Set the coredump_filter flags on the gdb process so the coredump it
// takes of the target process contains everything the tests need.
if (debugger == NativeDebugger.Gdb)
{
initialCommands.Insert(0, string.Format("shell echo 0x3F > /proc/{0}/coredump_filter", processRunner.ProcessId));
}
// Execute the initial debugger commands
await sosRunner.RunCommands(initialCommands);
return(sosRunner);
}
catch (Exception ex)
{
// Log the exception
outputHelper?.WriteLine(ex.ToString());
// The runner needs to kill the process and dispose of the file logger
sosRunner?.Dispose();
// The file logging output helper needs to be disposed to close the file
outputHelper?.Dispose();
throw;
}
}
