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IWETHEY Home / IWETHEY Board / Theory and Practice of Programming Forum / That's a pretty good answer
Post #205,958
by tuberculosis
Picture of tuberculosis
5/4/05 8:17:09 PM
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New That's a pretty good answer
IOW, in "managed code" its not possible to do things like manipulate arbitrary memory in the machine - a behavior relied upon by things like some viruses and worms. C# has no pointer construct and so you are playing in "the sandbox" as Chris said. You can't hurt anything from there and your code is subject to user defined security policies.

Unmanaged code is like C/C++. You can do anything to any byte in the machine. No safety rails, no sandbox, no second chances.


"Whenever you find you are on the side of the majority, it is time to pause and reflect"   --Mark Twain

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them."   --Albert Einstein

"This is still a dangerous world. It's a world of madmen and uncertainty and potential mental losses."   --George W. Bush
Post #206,086
by jb4
Picture of jb4
5/5/05 11:35:07 AM
Reply
New Any byte in the machine, or...
...any byte in your process's address space? (I assume that my process cannot touch your process's stuff...)
jb4
shrub\ufffdbish (Am., from shrub + rubbish, after the derisive name for America's 43 president; 2003) n. 1. a form of nonsensical political doubletalk wherein the speaker attempts to defend the indefensible by lying, obfuscation, or otherwise misstating the facts; GIBBERISH. 2. any of a collection of utterances from America's putative 43rd president. cf. BULLSHIT
Post #206,089
by ChrisR
5/5/05 11:52:30 AM
Reply
New As much protection as the Operating System provides...
...which for Windows is to say None At All. Unmanaged code is the umbrella of native code that's not managed within the sandbox. All those VBX or COM or COM+ or DCOM things can be invoked within the unmanaged state.
     Need a comparison, C#.NET vs Java - (drewk) - (27) - May 4, 2005, 12:17:48 AM EDT
         IBM's JVM has better GC control. - (Another Scott) - (1) - May 4, 2005, 12:27:21 AM EDT
             What about platform independence? - (drewk) - May 4, 2005, 12:39:40 AM EDT
         Warning. C# and .NET are actually quite nice. - (pwhysall) - (1) - May 4, 2005, 01:18:45 AM EDT
             Actually, I think dot net is so '90s - (tonytib) - May 4, 2005, 12:05:43 PM EDT
         Corrections - (ben_tilly) - May 4, 2005, 02:51:16 AM EDT
         Haven't studied memory managmenent, don't want to - (warmachine) - May 4, 2005, 02:57:28 AM EDT
         Key differences: One of them sucks - (tuberculosis) - (17) - May 4, 2005, 03:10:22 AM EDT
             Is "unmanaged" what he means when he says "unsafe function"? - (drewk) - (11) - May 4, 2005, 09:15:53 AM EDT
                 Send him here - (ben_tilly) - (9) - May 4, 2005, 09:46:31 AM EDT
                     Seconded. - (static) - (8) - May 5, 2005, 07:29:31 PM EDT
                         Thirded - (Ashton) - May 18, 2005, 01:34:52 AM EDT
                         Your honeymoon's showing. - (pwhysall) - (6) - May 18, 2005, 02:58:22 AM EDT
                             :-) -NT - (Another Scott) - May 18, 2005, 06:57:37 AM EDT
                             I read a statistic once ... - (drewk) - May 18, 2005, 09:07:39 AM EDT
                             That wasn't a deliberate misunderstanding, was it? - (static) - (3) - May 18, 2005, 08:47:29 PM EDT
                                 </jokeson> -NT - (pwhysall) - (1) - May 19, 2005, 01:11:47 AM EDT
                                     Yes, I know. :-) -NT - (static) - May 20, 2005, 09:51:28 AM EDT
                                 How could it be anything else?!? Paranoia much, eh...? :-) -NT - (CRConrad) - May 19, 2005, 02:42:29 AM EDT
                 Yes - (tuberculosis) - May 4, 2005, 10:31:33 AM EDT
             OT-OK Todd (and any body else who has a good answer)... - (jb4) - (4) - May 4, 2005, 07:03:55 PM EDT
                 Probably not a good answer...but... - (ChrisR) - (3) - May 4, 2005, 07:15:11 PM EDT
                     That's a pretty good answer - (tuberculosis) - (2) - May 4, 2005, 08:17:09 PM EDT
                         Any byte in the machine, or... - (jb4) - (1) - May 5, 2005, 11:35:07 AM EDT
                             As much protection as the Operating System provides... - (ChrisR) - May 5, 2005, 11:52:30 AM EDT
         Re: Need a comparison, C#.NET vs Java - (dshellman) - May 4, 2005, 12:59:02 PM EDT
         As long as you want to manage the low level details.... - (ChrisR) - (1) - May 4, 2005, 03:03:13 PM EDT
             :-) -NT - (Another Scott) - May 4, 2005, 03:12:05 PM EDT

SHUT THAT BLOODY BOUZOUKI UP!
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