Task: High-Level Languages

Enter the labs/lab-02/tasks/high-level-lang/ folder, then enter spport/ Then go through the practice items below.

1. Use make to create the hello executable from the hello.go file (a Go “Hello, World!”-printing program). Use ltrace and strace to compute the number of library calls and system calls. Use perf to measure the running time.

   Compare the values with those from the “Hello, World!”-printing programs in C and Python.

2. Create a “Hello, World!”-printing program in a programming language of your choice (other than C, Python and Go). Find the values above (library calls, system calls and running time).

   Quiz

3. Create programs in C, Python and Go that compute the N-th Fibonacci number. N is passed as a command-line argument. Run the checker (make check in the high-level-lang/solution/tests/ folder) to check your results.

   Use ltrace and strace to compute the number of library calls and system calls. Use perf to measure the running time.

   Compare the values of the three programs.

4. Create programs in C, Python and Go that copy a source file into a destination file. Both files are passed as the two command-line arguments for the program. Run the checker (make check in the high-level-lang/support/tests/ folder) to check your results.

   Sample run:

   student@so:~/.../solution/tests/$ make check
   make -C ../src
   make[1]: Entering directory '/media/teo/1TB/Poli/Asistent/SO/operating-systems/labs/lab-02/tasks/high-level-lang/solution/src'
   go build -ldflags '-linkmode external -extldflags "-dynamic"' hello.go
   cc   -z lazy  fibo.c   -o fibo
   go build -o fibo_go -ldflags '-linkmode external -extldflags "-dynamic"' fibo.go
   cc   -z lazy  copy.c   -o copy
   go build -o copy_go -ldflags '-linkmode external -extldflags "-dynamic"' copy.go
   make[1]: Leaving directory '/media/teo/1TB/Poli/Asistent/SO/operating-systems/labs/lab-02/tasks/high-level-lang/solution/src'
   Fibonacci [C]       --  fibo(10) ==   55  --  PASSED
   Fibonacci [C]       --  fibo( 5) ==    5  --  PASSED
   Fibonacci [C]       --  fibo(20) == 6765  --  PASSED
   Fibonacci [Python]  --  fibo(10) ==   55  --  PASSED
   Fibonacci [Python]  --  fibo( 5) ==    5  --  PASSED
   Fibonacci [Python]  --  fibo(20) == 6765  --  PASSED
   Fibonacci [Go]      --  fibo(10) ==   55  --  PASSED
   Fibonacci [Go]      --  fibo( 5) ==    5  --  PASSED
   Fibonacci [Go]      --  fibo(20) == 6765  --  PASSED
   Copy [C]            --  PASSED
   Copy [Python]       --  PASSED
   Copy [Go]           --  PASSED
   

   Use ltrace and strace to compute the number of library calls and system calls. Use perf to measure the running time. Use source files of different sizes. Compare the outputs of these commands on the three programs.

If you’re having difficulties solving this exercise, go through this reading material.