oop - Solve out of memory error using Static Program Analysis -


out of memory 1 of frequent errors in java , other oo languages. can apply static program analysis reduce "out of memory" errors ? looking approaches aims reduce error without running code. there particular areas of analysis perform research in ?

yes, static analyzers able detect out of bounds. worse dynamic analyzers, cannot trace complex cases of pointer usage. moreover, static analyzers cannot obtain information. let’s consider abstract situation:

void outstandingissue(const char *strcount) {   unsigned ncount;   sscanf_s(strcount, "%u", &ncount);    int array[10];   memset(array, 0, ncount * sizeof(int)); }

whether array index out of bounds happens or not, depend on data received outside. static code analyzer powerless here. maximum of can here warn entered value used without check. dynamic analyzer detect error during testing program, while receive various variants of input data. these topics given here more details.

but if there question “does static analyzer help?”, answer yes, does. example, collection of bugs gathered pvs-studio team contains number of type errors detected static analyzer: v512, v645.


Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more