How to use SystemView Heap Monitoring - Custom Heap

This article assumes a working SystemView setup. To gain some more info on this subject, please consult either the main article (How to use SystemView Heap_Monitoring) or the SystemView documentation.

static void* _MyMalloc(size_t size) {
  void* p = malloc(size);
  // SystemView needs the real internal heap block size, not the amount requested by the user
  SEGGER_SYSVIEW_HeapAlloc(__heap_start__, p, _GetAllocBlockSize(size));
  return p;
}

Since there is no dedicated realloc SystemView API function, a combination of SEGGER_SYSVIEW_HeapFree and SEGGER_SYSVIEW_HeapAlloc is needed:

static void* _MyRealloc(void* p, size_t size) {
  void* rp = realloc(p, size);
  SEGGER_SYSVIEW_HeapFree(__heap_start__, p);
  // SystemView needs the real internal heap block size, not the amount requested by the user
  SEGGER_SYSVIEW_HeapAlloc(__heap_start__, rp, _GetAllocBlockSize(size));
  return rp;
}

static void _MyFree(void* p) {
  free(p);
  SEGGER_SYSVIEW_HeapFree(__heap_start__, p);
}