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// GdbSessionFactory.cs
//
// Author:
// Lluis Sanchez Gual <lluis@novell.com>
//
// Copyright (c) 2008 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//
using System;
using System.Collections.Generic;
using System.IO;
using Mono.Debugging.Client;
using MonoDevelop.Core.Execution;
namespace MonoDevelop.Debugger.Gdb
{
class GdbDebuggerBackend : DebuggerEngineBackend
{
struct FileData
{
public DateTime LastCheck;
public bool IsExe;
}
Dictionary<string, FileData> fileCheckCache = new Dictionary<string, FileData> ();
public override bool CanDebugCommand (ExecutionCommand cmd)
{
if (!(cmd is NativeExecutionCommand nativeCmd))
return false;
string file = FindFile (nativeCmd.Command);
if (!File.Exists (file)) {
// The provided file is not guaranteed to exist. If it doesn't
// we assume we can execute it because otherwise the run command
// in the IDE will be disabled, and that's not good because that
// command will build the project if the exec doesn't yet exist.
return true;
}
file = Path.GetFullPath (file);
DateTime currentTime = File.GetLastWriteTime (file);
if (fileCheckCache.TryGetValue (file, out var data)) {
if (data.LastCheck == currentTime)
return data.IsExe;
}
data.LastCheck = currentTime;
try {
data.IsExe = IsExecutable (file);
} catch {
data.IsExe = false;
}
fileCheckCache [file] = data;
return data.IsExe;
}
public override DebuggerStartInfo CreateDebuggerStartInfo (ExecutionCommand cmd)
{
var nativeCmd = (NativeExecutionCommand)cmd;
var startInfo = new DebuggerStartInfo {
Command = nativeCmd.Command,
Arguments = nativeCmd.Arguments,
WorkingDirectory = nativeCmd.WorkingDirectory
};
if (nativeCmd.EnvironmentVariables.Count > 0) {
foreach (KeyValuePair<string, string> val in nativeCmd.EnvironmentVariables)
startInfo.EnvironmentVariables [val.Key] = val.Value;
}
return startInfo;
}
internal static bool IsExecutable (string file)
{
// HACK: this is a quick but not very reliable way of checking if a file
// is a native executable. Actually, we are interested in checking that
// the file is not a script.
using (var sr = new StreamReader (file)) {
char [] chars = new char [3];
int n = 0, nr = 0;
while (n < chars.Length && (nr = sr.ReadBlock (chars, n, chars.Length - n)) != 0)
n += nr;
if (nr != chars.Length)
return true;
if (chars [0] == '#' && chars [1] == '!')
return false;
}
return true;
}
public override DebuggerSession CreateSession ()
{
return new GdbSession ();
}
public override ProcessInfo [] GetAttachableProcesses ()
{
var procs = new List<ProcessInfo> ();
foreach (string dir in Directory.GetDirectories ("/proc")) {
if (!int.TryParse (Path.GetFileName (dir), out var id))
continue;
try {
File.ReadAllText (Path.Combine (dir, "sessionid"));
} catch {
continue;
}
string cmdline = File.ReadAllText (Path.Combine (dir, "cmdline"));
cmdline = cmdline.Replace ('\0', ' ');
procs.Add (new ProcessInfo (id, cmdline));
}
return procs.ToArray ();
}
static string FindFile (string cmd)
{
if (Path.IsPathRooted (cmd))
return cmd;
string pathVar = Environment.GetEnvironmentVariable ("PATH");
string [] paths = pathVar.Split (Path.PathSeparator);
foreach (string path in paths) {
string file = Path.Combine (path, cmd);
if (File.Exists (file))
return file;
}
return cmd;
}
}
[Obsolete ("Should not have been public")]
public class GdbSessionFactory: IDebuggerEngine
{
readonly GdbDebuggerBackend backend = new GdbDebuggerBackend ();
public bool CanDebugCommand (ExecutionCommand command)
{
return backend.CanDebugCommand (command);
}
public DebuggerStartInfo CreateDebuggerStartInfo (ExecutionCommand command)
{
return backend.CreateDebuggerStartInfo (command);
}
public bool IsExecutable (string file)
{
return GdbDebuggerBackend.IsExecutable (file);
}
public DebuggerSession CreateSession ()
{
return backend.CreateSession ();
}
public ProcessInfo[] GetAttachableProcesses ()
{
return backend.GetAttachableProcesses ();
}
}
}
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