Jump to file/line in the Unity console window callstack via this helper window

ConsoleCallStackHelper.cs

// MIT License
// 
// Copyright (c) 2018 Sabresaurus
// 
// 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.Reflection;
using UnityEditor;
using UnityEngine;

public class ConsoleCallStackHelper : EditorWindow
{
    Vector2 scrollPosition = Vector2.zero;

    [MenuItem("Tools/Call Stack")]
    static void Init()
    {
        ConsoleCallStackHelper window = EditorWindow.GetWindow<ConsoleCallStackHelper>();
        window.Show();
        window.titleContent = new GUIContent("Call Stack");
    }

    private void OnGUI()
    {
        Color backgroundColor = GUI.backgroundColor;
        Type consoleWindowType = Type.GetType("UnityEditor.ConsoleWindow, UnityEditor", true);
        UnityEngine.Object[] windows = Resources.FindObjectsOfTypeAll(consoleWindowType);
        if (windows.Length > 0)
        {
            // Fetch the active callstack from the console window
            FieldInfo fieldInfo = consoleWindowType.GetField("m_ActiveText", BindingFlags.Instance | BindingFlags.NonPublic);
            string output = (string)fieldInfo.GetValue(windows[0]);

            GUIStyle style = new GUIStyle(GUI.skin.label);
            style.wordWrap = true;
            style.richText = true;

            style.normal.background = EditorGUIUtility.whiteTexture;

            scrollPosition = EditorGUILayout.BeginScrollView(scrollPosition);
            GUI.backgroundColor = new Color(1, 1, 1, 0.25f);

            // Split the callstack into lines
            string[] lines = output.Split('\n');
            foreach (string line in lines)
            {
                string displayLine = line;
                int firstIndex = line.LastIndexOf(" (at Assets/", StringComparison.InvariantCultureIgnoreCase);
                // Wrap the line in bold tags
                if (firstIndex != -1)
                {
                    displayLine = displayLine.Insert(firstIndex + 5, "<b>");
                    displayLine = displayLine.Insert(displayLine.Length - 1, "</b>");
                }
                // Click the line if valid
                if (GUILayout.Button(displayLine, style))
                {
                    if (firstIndex != -1)
                    {
                        // Valid target, jump to the line in the file
                        string trimmed = line.Substring(firstIndex + 5, line.Length - firstIndex - 6);
                        string[] splitLine = trimmed.Split(':');
                        AssetDatabase.OpenAsset(AssetDatabase.LoadMainAssetAtPath(splitLine[0]), int.Parse(splitLine[1]));
                    }
                }
                // Show a rollover cursor on valid targets
                if (firstIndex != -1)
                {
                    Rect rect = GUILayoutUtility.GetLastRect();
                    EditorGUIUtility.AddCursorRect(rect, MouseCursor.Link);
                }
            }
            GUI.backgroundColor = backgroundColor;

            EditorGUILayout.EndScrollView();
        }
    }

    void OnInspectorUpdate()
    {
        // Repaint 10 times a second in case they clicked a new log entry
        Repaint();
    }
}