Timecop
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More than most movies about time travel, \"Timecop\" invites you to meditate on the logical contradictions of the genre. It begins with the organization of Time Enforcement Police laboring to prevent the tampering with time. Their job: Stop villains from tampering with the past and producing catastrophic results in the present. But right away you have some problems: How do you know which \"present\" is your baseline And how can you know it isn't already the result of tampering with the past Just think: A zealous timecop could change the present by preventing the tampering with the past.
Well, says the movie, the present is defined as Now. That is because \"you can travel back in time, but not into the future, because the future hasn't happened yet.\" Yes, but once you do travel back in time, the present becomes the future that has not yet happened. And furthermore, how can a traveling timecop return to the present from the past without, in effect, traveling into the future You see what we're up against here. \"Timecop,\" a low-rent \"Terminator,\" is the kind of movie that is best not thought about at all, for that way madness lies. Even in the last frames of the film, we are being presented with paradoxes, as when a weary timecop (Jean-Claude Van Damme), having battled through the decades to set things right, returns home and is greeted by a child he has never seen before, who cries out, \"Dad!\" What and where is the person, identical to Van Damme, who the child has known as Dad Doesn't that mean there is an extra timecop around What happens when they meet Ah, but the movie has already answered that question, in a scene where a time-traveling evil U.S. senator meets himself in the past. The rules are, you cannot touch \"yourself\" without setting up a fearsome rent in the fabric of time. When the two selves make contact, they are immediately processed by a computer morphing program which melts them into one another with some of the same fearsome consequences that made life miserable for the poor silver guy in \"Terminator 2: Judgment Day.\" \"Timecop\" throws everything into the pot. It's a cop buddy movie about a political conspiracy, ranging roughly from 1863, when gold intended for Lee's army is stolen, to 2004, when it may be used to finance a political campaign. (The belief that the amount of gold that can be carried on one horse would make a financial difference in 2004 is the most optimistic element in the movie.) Van Damme plays the cop, named Walker, who lives with his wife, Melissa, (Mia Sara) in the kind of turreted, gabled, four-story Gothic manor that, as we all know, is the typical residence of Washington, D.C. policemen. The house seems too large for their needs, until we realize the movie plans to employ the Climbing Villain Syndrome in its climactic scenes, which take place on a Dark and Stormy Night; those gables will be necessary so that people can hang from them by their fingernails.
The U.S. government is concerned about attempts to alter the past, and has decided to create its timecop force, to be run by District of Columbia policemen. How the CIA let this plum get away from them is not explained. Ron Silver plays McComb, the ambitious Senator who plans to manipulate the past in order to get himself elected President, and of course that makes him a criminal, guilty of \"time travel with intent to alter the future.\" The time travelers launch themselves into the past by being strapped into a rocket car which hurtles down rails toward a wall.
If you've used TIMECOP (see below)to try to find violations of goal-constbranchand goal-constindex,copy the timecop_pass lineinto goal-constbranchand into goal-constindex.The word \"reviewed\" indicates a manual code review.Either way,you're taking responsibility foryour goal-constbranch and goal-constindex declarations,just like any other security claims that you make.
You can also set TIMECOP to a larger number to carry out that number of TIMECOP tests;one test catches most deviations, but not all.The database will say timecop_passfor implementations where TIMECOP did not detect problems,and timecop_failfor implementations where TIMECOP detected problems.The timecop_fail detailswill often let you rapidly pinpoint the code causing problems,especially if you add -g to the compiler options.
TIMECOP can have false negatives:timecop_pass for code that is not actually constant-time.The most common reason for thisis that the message lengths tried by TIMECOP take constant timebut other message lengths take variable time.
TIMECOP can also have false positives:timecop_fail for code that is actually constant-time.The most common reasons for false positivesare (1) early aborts, such as authenticated encryptionchecking the authenticator first and returning immediately if authentication fails;and(2) rejection sampling, such as RSA key generationrepeatedly generating secret integers until it finds a prime.To make TIMECOP happy, call
TIMECOP will producetimecop_errorif Valgrind fails in a way that is not clearly attributable toa branch or memory address based on secret data.This can indicate an implementation bug,or a lack of instruction support in Valgrind.Instructions not supported by Valgrindinclude AMD XOP instructions;32-bit AVX2 instructions;setend on ARM;cycle-counting coprocessor instructions on ARM;and rdpmc for cycle counting on Intel/AMD.If you run into cycle-counting problems,try disabling the problematic cycle counter:e.g., move cpucycles/armv8.c to cpucycles/armv8.c.disabledor move cpucycles/amd64rdpmc.c to cpucycles/amd64rdpmc.c.disabled,and then start over with ./do-part init.In SUPERCOP versions starting 20210125,TIMECOP automatically skips cycle countersthat don't work under Valgrind.
Role: \"Tommy Maddox\"Airdate: 07.18.98 on ABC\"I played Maddox, a timecop who got fed up with the life-threatening aspects of temporal justice and goes AWOL. Alas, the show was doomed to cancellation and Maddox only saw the light of day once.\" -BC 59ce067264