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???
08/22/09 17:31
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 		 #168473 - Yeah, you can do that ... but it's not recommended
Responding to: ???'s previous message
Andy Neil said:
Richard Erlacher said:
I've never encountered a memory leak in my ASM programming

Presumably because you don't do dynamic allocation in ASM?!

More likely in ASM is the classic "popping more than you pushed" problem...

True enough, but that's not the classic memory leak problem, though on a scale such as found on 805x MCU's, with at most 128 bytes of iRAM for stack it could be a problem. It's easily found, though. The thing HLL's allow is grabbing dynamically allocated RAM form the common pool and forgetting to return it.

HLL's can, but don't necessarily, generate memory leaks because they use dynamic memory allocation

That has nothing to do with the language: if you write your 'C' programs without using dynamic allocation, you won't get leaks - again, you must compare like with like.

Of course, 'C' will never "pop more than it pushed"


Yes, but it could pop or push more than you've got, if you're not just as careful as you'd have to be in ASM. Of course, some HLL's will slap your wrist if you do that.

RE



List of 131 messages in thread
TopicAuthorDate
Article: "Real engineers program in C"            01/01/70 00:00      
   C and Latin            01/01/70 00:00      
      similarities between English and C            01/01/70 00:00      
         all sorts of similarities            01/01/70 00:00      
      NOT engineers.....            01/01/70 00:00      
         I think that was his point?            01/01/70 00:00      
            I know            01/01/70 00:00      
               I also don't know if his diagram on Page 3 is right            01/01/70 00:00      
   fewer ASM developers            01/01/70 00:00      
   languages            01/01/70 00:00      
   Muscle Vs Fat            01/01/70 00:00      
      apples vs bears            01/01/70 00:00      
         Wait a minute, pilgrim!            01/01/70 00:00      
            pilgrim has arrived            01/01/70 00:00      
            Break out that DOS Computer            01/01/70 00:00      
               I do that quite often!            01/01/70 00:00      
            blame drivers            01/01/70 00:00      
               Equip them right and they seem to work ... sort-of            01/01/70 00:00      
                  Engineers and Marketing guys            01/01/70 00:00      
            jeeziz x kryst            01/01/70 00:00      
               So ... Why do you do all that?            01/01/70 00:00      
                  wrong choice of word            01/01/70 00:00      
                     It's just a millstone ...            01/01/70 00:00      
                  re: why?            01/01/70 00:00      
      My computer _boots_ faster than that.            01/01/70 00:00      
         DMA?            01/01/70 00:00      
      Maybe it's the amount of memory            01/01/70 00:00      
         The cost of mutlitasking..            01/01/70 00:00      
         haven't any time to waste            01/01/70 00:00      
            That would be too slow!            01/01/70 00:00      
               I see no ships!            01/01/70 00:00      
               Isn't 4k plenty for a '51?            01/01/70 00:00      
                  which '51 does have that?            01/01/70 00:00      
                     Erik would call those "deviates".            01/01/70 00:00      
                        nope            01/01/70 00:00      
                        pipelines, cars, and real engineers            01/01/70 00:00      
                           It's also pipelined.            01/01/70 00:00      
                              then it's irrelevant            01/01/70 00:00      
                  If you can ignore those features            01/01/70 00:00      
               keeping up            01/01/70 00:00      
                  I feel your pain ...            01/01/70 00:00      
                     Don't see problems - see possibilities            01/01/70 00:00      
                        Do you really want to hide from reality?            01/01/70 00:00      
                           Always hiding behind excuses            01/01/70 00:00      
                              What excuses?            01/01/70 00:00      
                                 Your excuses            01/01/70 00:00      
                                    Do you directly or indirectly work for Keil?            01/01/70 00:00      
                                       BULL!!            01/01/70 00:00      
                                          I don't harbor any animosity, but I don't like being lied-to            01/01/70 00:00      
                                             you "understand well enough"            01/01/70 00:00      
                                                I have to agree ... evaluation takes time ...            01/01/70 00:00      
                                                   this is where I think I'm the realist            01/01/70 00:00      
                                                      If only the pieces were separately available ...            01/01/70 00:00      
                                                         I can't and would never            01/01/70 00:00      
                                                            So ... Who's a simulator specialist?            01/01/70 00:00      
                                                               don't know, don't care            01/01/70 00:00      
                                                                  So why even mention it?            01/01/70 00:00      
                                                                     because someone (you?) brought it up            01/01/70 00:00      
                                       Tangential Richard at work            01/01/70 00:00      
                           the pot calling the kettle black            01/01/70 00:00      
                     that's the crux            01/01/70 00:00      
                        It's a matter of realism            01/01/70 00:00      
                           well, if you do not have the time to evaluate, your points            01/01/70 00:00      
                              I have to disagree ...            01/01/70 00:00      
                                 no need            01/01/70 00:00      
                                    That would be an ideal fix!            01/01/70 00:00      
                  no way            01/01/70 00:00      
                     but only if we both define a project            01/01/70 00:00      
                        oh, that's no proof then...            01/01/70 00:00      
                           It would be a nice idea, but how would you time it?            01/01/70 00:00      
                           you did not read what I said            01/01/70 00:00      
                              implication and how to challenge it            01/01/70 00:00      
                                 disassembly            01/01/70 00:00      
                                    Encryption module?            01/01/70 00:00      
                                    not at all            01/01/70 00:00      
                                       It's clear to see that some folks really like 'C'            01/01/70 00:00      
                                          can you only like one thing?            01/01/70 00:00      
                                             Yes, but ...            01/01/70 00:00      
                                                you can boil steak too            01/01/70 00:00      
                                                   but you don't have to do that            01/01/70 00:00      
                                                      but you just said            01/01/70 00:00      
                                       no praise, just not hate            01/01/70 00:00      
                                          That makes sense            01/01/70 00:00      
                                          not that claim            01/01/70 00:00      
                                             again you miss 'usually', 'mostly', 'often', etc            01/01/70 00:00      
                                                Not so ... exactly            01/01/70 00:00      
                                                   Based on what experience?            01/01/70 00:00      
                                                      That's not how it works            01/01/70 00:00      
                                                         maintenance is a totally different issue            01/01/70 00:00      
                                                         apples to pears?            01/01/70 00:00      
                                                            I don't need to compare/contrast apples and pears            01/01/70 00:00      
                                                               The embedded world is larger than your tiny island            01/01/70 00:00      
                                                   IF            01/01/70 00:00      
                                                      It's all about initial hardware cost, not maintenance cost.            01/01/70 00:00      
                                                         Value of investment            01/01/70 00:00      
                                                         Not Here            01/01/70 00:00      
                                                         Whose business?            01/01/70 00:00      
                                                            What do you mean by "code analysis tools"?            01/01/70 00:00      
                                                               Some important tests            01/01/70 00:00      
                                                                  Yes, those come up in HLL, but ...            01/01/70 00:00      
                                                                     Memory leaks nothing to do with HLL            01/01/70 00:00      
                                                                        Yeah, you can do that ... but it's not recommended            01/01/70 00:00      
                                                                           More way than one to create memory leaks            01/01/70 00:00      
                                                                           that is not applicable to small embedded            01/01/70 00:00      
                                                                     Way easier to analyse non-goto code            01/01/70 00:00      
                                                                        and why would that be?            01/01/70 00:00      
                                                                           General purpose languages normally allows dangers            01/01/70 00:00      
                                                                              You still don't get the point, Per            01/01/70 00:00      
                                                                                 Wrong question            01/01/70 00:00      
                                                                                    what view?            01/01/70 00:00      
                                                                                       and the answer is            01/01/70 00:00      
                                                                                       can be seen as a leading question            01/01/70 00:00      
                                                                        Careful now! Some folks like Pascal for the '51            01/01/70 00:00      
                                                                           Why?            01/01/70 00:00      
                                                                        Some things depend on your point of view            01/01/70 00:00      
                                                                           Richard has never, ever, in his whole life implemented a bug            01/01/70 00:00      
                                                                              I may have written 'em, but I've never shipped 'em            01/01/70 00:00      
                                                               QAC and Polyspace            01/01/70 00:00      
                                                                  thanks, Oliver            01/01/70 00:00      
                                                                     MISRA and assembly don't mix well.            01/01/70 00:00      
                                                                        you can write FORTRAN in any language            01/01/70 00:00      
                                                                           I know ... but MISRA rules are explicit.            01/01/70 00:00      
                                                                              Not happy will all parts of MISRA            01/01/70 00:00      
                                                                                 Interesting discussion of MISRA C:            01/01/70 00:00      
                                                                                 Flawed but useful            01/01/70 00:00      
                                                                              Nested comments can produce different results            01/01/70 00:00      
                                                                           That's the thing with rules            01/01/70 00:00      
                                                                     Polyspace            01/01/70 00:00      
            Also in VB            01/01/70 00:00      
               Amazing!            01/01/70 00:00      
   You really are very naughty Andy            01/01/70 00:00      

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