31   struct _trSPACE *next, *prev;  member
109   if (head && head->prev) {  in PetscMallocValidate()
112 …rPrintf)("Root memory header %p has invalid back pointer %p\n", (void *)head, (void *)head->prev));  in PetscMallocValidate()
142     if (head->prev && head->prev != lasthead) {  in PetscMallocValidate()
145 …PetscCall((*PetscErrorPrintf)("Backpointer %p is invalid, should be %p\n", (void *)head->prev, (vo…  in PetscMallocValidate()
180   if (TRhead) TRhead->prev = head;  in PetscTrMallocDefault()
183   head->prev   = NULL;  in PetscTrMallocDefault()
308   if (head->prev) head->prev->next = head->next;  in PetscTrFreeDefault()
311   if (head->next) head->next->prev = head->prev;  in PetscTrFreeDefault()
378   if (head->prev) head->prev->next = head->next;  in PetscTrReallocDefault()
380   if (head->next) head->next->prev = head->prev;  in PetscTrReallocDefault()
388   if (TRhead) TRhead->prev = head;  in PetscTrReallocDefault()
391   head->prev   = NULL;  in PetscTrReallocDefault()