Heap overflow and Stack overflow in C - Tutorialspoint

Heap overflow and Stack overflow in C - Heap OverflowHeap is used to store dynamic variables. It is a region of process's memory. malloc(), ... Home CodingGround Jobs Whiteboard Tools Business Teachwithus TrendingCategories DataStructure Networking RDBMS OperatingSystem Java iOS HTML CSS Android Python CProgramming C++ C# MongoDB MySQL Javascript PHP SelectedReading UPSCIASExamsNotes Developer'sBestPractices QuestionsandAnswers EffectiveResumeWriting HRInterviewQuestions ComputerGlossary WhoisWho HeapoverflowandStackoverflowinC CServerSideProgrammingProgramming HeapOverflowHeapisusedtostoredynamicvariables.Itisaregionofprocess’smemory.malloc(),calloc(),resize()alltheseinbuiltfunctionsaregenerallyusedtostoredynamicvariables.Heapoverflowoccurswhen−A)Ifweallocatedynamiclargenumberofvariables−intmain(){   float*ptr=(int*)malloc(sizeof(float)*1000000.0)); }B)Ifwecontinuouslyallocatememoryanddonotfreeafterusingit.intmain(){   for(inti=0;i<100000000000;i++){    int*p=(int*)malloc(sizeof(int)); } }StackOverflowStackisaLastinFirstoutdatastructure.Itisusedtostorelocalvariableswhichisusedinsidethefunction.Parametersarepassedthroughthisfunctionandtheirreturnaddresses.Ifaprogramconsumesmorememoryspace,thenstackoverflowwilloccurasstacksizeislimitedincomputermemory.Stackoverflowoccurswhen−C)Ifafunctioniscalledrecursivelybyitselfinfinitetimesthenstackwillbeunabletostorelargenumberoflocalvariables,sostackoverflowwilloccur−voidcalculate(inta){   if(a==0)    return;    a=6;    calculate(a); } intmain(){   inta=5;   calculate(a); }D)Ifwedeclarealargenumberoflocalvariablesordeclarealargedimensionalarrayormatrixcanresultstackoverflow.intmain(){   A[20000][20000] } karthikeyaBoyini Updatedon30-Jul-201922:30:25 RelatedQuestions&AnswersHeapoverflowandStackoverflow Javaoverflowandunderflow CounterSizeandCounterOverflow CSSoverflow:visible CSSoverflow:hidden CSSoverflow:scroll CSSoverflow:auto CSSoverflow-y CSSoverflow-x CheckforIntegerOverflowinC++ ProperstackandheapusageinC++? CSStext-overflowproperty HowtodetectintegeroverflowinC++? HowtodetectintegeroverflowinC/C++? OverflowofDataTypesinJava PreviousPage PrintPage NextPage  Advertisements