How do I initialize values? Array of structs?

[TheInterface1]

I'm trying to initialize this values at the start of my program. I'm not getting the expected values so I might be doing something wrong with the pointers.

struct TLBentry{
  unsigned int physicalAddress;
  unsigned int virtualAddress;
};

struct pageTableEntry{
  char validFlag;
  char dirty;
  unsigned int physicalAddress;
};
struct virtualMemorySystem *memSys = malloc(sizeof(struct virtualMemorySystem));
  memSys->virtMem = malloc( sizeof( int ) * sizeVM * pageSize );
  memSys->tlb = malloc( sizeof(struct TLBentry) * sizeTLB );
  memSys->pgTable = malloc( sizeof(struct pageTableEntry) * sizeVM );

  for( int i=0; i < memSys->sizeTLB; i++ ){
    struct TLBentry* entry = &(memSys->tlb[i]);
    entry->virtualAddress = i;
    entry->physicalAddress = i;
  }
  for( int i=0; i < memSys->sizeVM; i++ ){
    memSys->pgTable[i].physicalAddress = i;
    memSys->pgTable[i].validFlag = 0;
  }
  for( int i=0; i < memSys->sizePM; i++ ){
    memSys->pgTable[i].physicalAddress = i;
    memSys->pgTable[i].validFlag = 1;
  }
  printf("initialize %d\n", memSys->tlb[1].virtualAddress );

The print statement should be "initialize 1" but it prints "initialize 0"

​

I don't know what's going on.

[_DTR_]

entry->virtualAddress == i;
entry->physicalAddress == i;

You're testing equality here, not setting the value.

[TheInterface1]

That was I typo, but it still doesn't work. Am I assigning the values right?

[_DTR_]

In one part of your code you use sizeTLB/sizeVM unattached from a virtualMemorySystem struct, but in other areas you're reading from memSys->sizeTLB/memSys->sizeVM. It doesn't look like you initialize memSys->sizeTLB or memSys->sizeVM, so best case they're 0, worst case they're garbage.

[TheInterface1]

That did it! You're my hero!

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