[RacerD] Detecting races in objects contained in a Map

[manebarros]

Please include the following information:

• [x] The version of infer from infer --version.
• [x] Your operating system and version, for example "Debian 9", "MacOS High Sierra", whether you are using Docker, etc.
• [x] Which command you ran, for example infer -- make.
• [x] The full output in a paste, for instance a gist.

• [x] If possible, a minimal example to reproduce your problem (for instance, some code where infer reports incorrectly, together with the way you run infer to reproduce the incorrect report).

I've been experimenting with RacerD with a simple Bank class, that stores Accounts in a Map. In this simple version, it fails to detect data races that might occur in concurrent accesses to the same account. Is this expected behaviour?

@ThreadSafe
public class Bank {
    private Map<Integer, Account> accounts;

    public class Account {
        int balance;

        public Account(int balance) {
            this.balance = balance;
        }

        public int balance() {
            return this.balance;
        }

        public void deposit(int quant) {
            balance += quant;
        }

        public boolean withdraw(int quant) {
            if (quant > balance)
                return false;
            balance -= quant;
            return true;
        }
    }

    public Bank(int n) {
        accounts = new HashMap<>();
        for (int i = 0; i < n; i++)
            accounts.put(i, new Account(0));
    }

    public int balance(int acc) {
        return this.accounts.get(acc).balance();
    }

    public void deposit(int acc, int quant) {
        this.accounts.get(acc).deposit(quant);
    }

    public boolean withdraw(int acc, int quant) {
        return this.accounts.get(acc).withdraw(quant);
    }
}

• Version of infer Infer version v1.1.0

• Operating system Fedora Linux 36 (Workstation Edition) x86_64 (Downloaded binaries)

• Command infer run --racerd-only -- javac Bank.java

• Output

  Capturing in javac mode...
  Found 1 source file to analyze in /home/mane/Proj_Inf/banco_simples/infer-out
  1/1 [################################################################################] 100% 57.59ms
  
  No issues found