In the next section of the walkthrough, we will record the execution of the sample app to see if we can determine why this exception is occurring. In Section 2, you will record a trace of the misbehaving sample "DisplayGreeting" app. To launch the sample app and record a TTD trace, follow these steps. Enter the path to the user mode executable that you wish to record or select Browse to navigate to the executable. Check the Record with Time Travel Debugging box to record a trace when the executable is launched.
When the "Configure recording" dialog box appears, Click Record to launch the executable and start recording. The recording dialog appears indicating the trace is being recorded.
Shortly after that, the application crashes. Click on Close Program , to dismiss the "DisplayGreeting has stopped working" dialog box. The debugger will automatically open the trace file and index it. Indexing is a process that enables efficient debugging of the trace file. This indexing process will take longer for larger trace files. A keyframe is a location in a trace used for indexing. Keyframes are generated automatically. Larger traces will contain more keyframes. At this point you are at the beginning of the trace file and are ready to travel forward and backward in time.
Now that you have a recorded a TTD trace, you can replay the trace back or work with the trace file, for example sharing it with a co-worker. In the next section of this lab we will analyze the trace file to locate the issue with our code. Add your local symbol location to the symbol path and reload the symbols, by typing the following commands.
To be able to view the state of the stack and local variables, on the WinDbg Preview ribbon, select View and Locals and View and Stack. Organize the windows to allow you to view them, the source code and the command windows at the same time. Locate the DisplayGreeting.
Use the dx command to list all of the events in the recording. The exception event is listed in the events. The exception data indicates that this is a Hardware fault thrown by the CPU. It also provides the exception code of 0xc that indicates that this is an access violation. This typically indicates that we were attempting to write to memory that we don't have access to. Of note in this output is that the stack and base pointer are pointing to two very different addresses.
This could indicate that stack corruption - possibly a function returned and then corrupted the stack. To validate this, we need to travel back to before the CPU state was corrupted and see if we can determine when the stack corruption occurred.
At the point of failure in trace it is common to end up a few steps after the true cause in error handling code. With time travel we can go back an instruction at a time, to locate the true root cause. From the Home ribbon use the Step Into Back command to step back three instructions. As you do this, continue to examine the stack and memory windows.
The command window will display the time travel position and the registers as you step back three instructions. In this walkthrough, the command output shows the commands that can be used instead of the UI Menu options to allow users with a command line usage preference to use command line commands. Of that sequence, the following was described: " We are inside Kirk's MIND as we see a series of hypnotic dream images floating up from Kirk's subconscious; undulating figures which float toward us and pass Liquid faces Kirk's image of himself running toward himself And then Because the Sphere-Builders exist in a separate dimension, they may not have had any involvement in the creation of the Temporal Accords.
Categories :. Stream the best stories. Start Your Free Trial. Try Now. USS Enterprise with crew. James T. Kirk and Spock. Kirk , Spock , and Leonard McCoy. Spock and Leonard McCoy. In addition, it is mentioned that the entire populace of Sarpeidon including the Prosecutor as well as many others in the centuries beforehand including Zarabeth and her family had previously used the atavachron to travel to the past. Kirk , Spock , and Erickson.
HMS Bounty with crew. Jean-Luc Picard aboard the shuttlepod El-Baz. USS Enterprise -C with crew. Ajur and Boratus. Berlinghoff Rasmussen aboard a time-pod. USS Bozeman with crew. Two Unnamed Devidians and Data. Two Unnamed Devidians. The two Devidians apparently made many trips before and perhaps during the episode to that were not shown, via temporal vortex.
Jean-Luc Picard 's consciousness and Q. Time is slowed considerably before being reversed due to being trapped in a temporal fragment. Jean-Luc Picard and Q. It is unknown how many trips Picard made before he became aware of it his memory was getting better with each trip. Star Trek: First Contact.
Borg sphere and crew including the Borg Queen. USS Enterprise -E and crew. Side effect of Borg traveling back through temporal vortex. Kira Nerys and Miles O'Brien. Akorem Laan aboard his lightship. Lisa Cusak 's distress call and subsequent transmissions.
USS Defiant response transmissions. Kathryn Janeway and B'Elanna Torres. Kathryn Janeway and Tom Paris. USS Voyager with crew and Quinn. Timeship Aeon and Captain Braxton. The Aeon 's temporal matrix creating a temporal rift. Captain Braxton. Seven of Nine and Captain Braxton. As Convergence gets ready to turn the world of DC Comics upside down and The Flash begins experimenting with travelling back and forth in time on TV, it feels like a big time for DC's take on time travel.
But really, time travel has been a crucial part of the way DC has structured its comics for decades. Essentially, so your brain doesn't leak out of your ears trying to grasp all the vagaries of various time travel arcs across the history of DC, it's easier to understand the way DC creators have used time travel over the years not as simply sliding back and forth across a single timeline. That kind of time travel is relatively simple in the DC Universe.
Advanced time travel ,however, is essentially the crux at which the various states of the DC Multiverse over the years hangs itself: alternate worlds are born of alternate timelines, and travel between the various numbered Earths over the years. It's less about reality hopping and more about bending the fabric of time to transpose yourself into another timeline. To understand time travel as a concept in DC's history is essentially to understand how the Multiverse has expanded and contracted over the years.
Simply put, from a metatextual level, time travel is an excuse often an excuse for alternate stories featuring familiar DC heroes, and over the years, the chance to reboot continuity. The DC Multiverse, and thus the role of time travel in DC comics, has waxed and waned over the years of the companies' existence — the more prominent the existence of alternate worlds, the more likely time travel stories are going on.
Here's a brief recap of how time travelling shenanigans have torn down and reshaped the DC Comics universe over the years. In the earliest days of the comics, outside of crossover series like Justice League, DC's universe wasn't exactly cohesive and connected. You had the splits between the Golden Age and Silver Age versions of their stalwart characters already creating a continuity mess, but in reality writers and editors didn't really care - each standalone series essentially sat in its own bubble, adventures only effecting each other as and when required, rather than huge ramifications playing out across multiple series as you might expect with a comic event today.
Amid these various continuities and canonical disputes, there emerged perhaps the DC Universe's premiere time traveller at least, in terms of the mainstream heroes : Barry Allen, a. Berry proposes that a deep understanding of the history and functioning of the evolving universe is a necessary inspiration and guide for our own effective functioning as individuals and as a species. This view has greatly influenced the development of deep ecology and ecophilosophy.
The experiential nature of the experience of deep time has also greatly influenced the work of Joanna Macy. Wells and Julian Huxley regarded the difficulties of coping with the concept of deep time as exaggerated:. From Wikipedia, the free encyclopedia. Concept of geologic time. For other uses, see Deep time disambiguation. Life timeline. This box: view talk edit. Single-celled life. Multicellular life. Arthropod Mollus. Earliest water. Earliest life.
Earliest oxygen. Atmospheric oxygen.There is nothing in Einstein’s theories of relativity to rule out time travel, although the very notion of traveling to the past violates one of the most fundamental premises of physics, that of causality. With the laws of cause and effect out the window, there naturally arises a number of inconsistencies associated with time travel, and listed here are some of those paradoxes which have.