Untitled

// Function to get the physical memory sizes for a process
void get_physical_memory_sizes(int pid, unsigned long* exclusiveSize, unsigned long* totalSize) {
    char filename[128];
    snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);

    FILE* file = fopen(filename, "r");
    if (file == NULL) {
        perror("Error opening file");
        return;
    }

    unsigned long exclusivePages = 0;
    unsigned long totalPages = 0;

    char line[256];
    while (fgets(line, sizeof(line), file)) {
        unsigned long start, end;
        if (sscanf(line, "%lx-%lx", &start, &end) != 2) {
            perror("Error parsing line");
            fclose(file);
            return;
        }

        unsigned long startPage = start / PAGE_SIZE;
        unsigned long endPage = end / PAGE_SIZE;
        
        for (unsigned long page = startPage; page <= endPage; ++page) {
            char pgMap[128];
            snprintf(pgMap, sizeof(pgMap), "/proc/%d/pagemap", pid);
            
            unsigned long pfn = read_file(pgMap, page);
            unsigned long temp = pfn & (1UL << 63);
            pfn = (pfn << 9) >> 9;

            
            if (temp == 0) {
                printf("irrr \n");
                continue;
            }
            
            unsigned long mappingCount = read_file("/proc/kpagecount", pfn);
            if (mappingCount == 0) {
                continue;
            }

            if (mappingCount == 1){
                exclusivePages++;
            }

            totalPages++;
        }
    }

    fclose(file);
    *exclusiveSize = exclusivePages * PAGE_SIZE;
    *totalSize = totalPages * PAGE_SIZE;
}