Operational Remediation Reports

Guard Flag Remediation Report

Turn the number of waiters behind a held guard flag into an enter, backoff, or page remediation action.

guard contention The waiter count behind a held guard flag is kept as a scalar, so the remediation action stays deterministic and never depends on closure or object identity.

Guard Flag Remediation Report

waiters
guard_flag_remediation.js
Replay: real traced execution (multi-file project)
const waiters = 0;
const guardLimit = 2;

function remediate(count) {
    const acquired = 1;
    let action = "enter";
    if (count >= 1 && count <= guardLimit) {
        action = "backoff";
    } else if (count > guardLimit) {
        action = "page";
    }
    console.log(`waiters=${count} acquired=${acquired} ${action}`);
}

remediate(waiters);

const waiters = 1;
const guardLimit = 2;

function remediate(count) {
    const acquired = 1;
    let action = "enter";
    if (count >= 1 && count <= guardLimit) {
        action = "backoff";
    } else if (count > guardLimit) {
        action = "page";
    }
    console.log(`waiters=${count} acquired=${acquired} ${action}`);
}

remediate(waiters);

const waiters = 3;
const guardLimit = 2;

function remediate(count) {
    const acquired = 1;
    let action = "enter";
    if (count >= 1 && count <= guardLimit) {
        action = "backoff";
    } else if (count > guardLimit) {
        action = "page";
    }
    console.log(`waiters=${count} acquired=${acquired} ${action}`);
}

remediate(waiters);

  1. waiters ← 0, guardLimit ← 2

    1const waiters→ 0 = 0;  //@waiters=1, 32const guardLimit→ 2 = 2;34function remediate(count) {5    const acquired = 1;6    let action = "enter";7    if (count >= 1 && count <= guardLimit) {8        action = "backoff";9    } else if (count > guardLimit) {10        action = "page";11    }12    console.log(`waiters=${count} acquired=${acquired} ${action}`);13}1415remediate(waiters0);

  2. acquired ← 1, action ← enter

    1const waiters = 0;  //@waiters=1, 32const guardLimit = 2;34function remediate(count0) {5    const acquired→ 1 = 1;6    let action→ enter = "enter";7    if (count >= 1 && count <= guardLimit) {8        action = "backoff";9    } else if (count > guardLimit) {10        action = "page";11    }12    console.log(`waiters=${count0} acquired=${acquired1} ${actionenter}`);13}
    outputwaiters=0 acquired=1 enter

  3. remediate(waiters);

    12    console.log(`waiters=${count} acquired=${acquired} ${action}`);13}1415remediate(waiters0);

  1. waiters ← 1, guardLimit ← 2

    1const waiters→ 1 = 1;2const guardLimit→ 2 = 2;34function remediate(count) {5    const acquired = 1;6    let action = "enter";7    if (count >= 1 && count <= guardLimit) {8        action = "backoff";9    } else if (count > guardLimit) {10        action = "page";11    }12    console.log(`waiters=${count} acquired=${acquired} ${action}`);13}1415remediate(waiters1);

  2. acquired ← 1, action ← enter

    1const waiters = 1;2const guardLimit = 2;34function remediate(count1) {5    const acquired→ 1 = 1;6    let action→ enter = "enter";7    if (count >= 1 && count <= guardLimit) {

  3. if (count >= 1 && count <= guardLimit)

    5const acquired = 1;6let action = "enter";7if (count1 >= 1 && count1 <= guardLimit2) {8    action = "backoff";9} else if (count > guardLimit) {

  4. console.log(`waiters=${count} acquired=${acquired} ${action}`);

    10        action = "page";11    }12    console.log(`waiters=${count1} acquired=${acquired1} ${actionbackoff}`);13}
    outputwaiters=1 acquired=1 backoff

  5. remediate(waiters);

    12    console.log(`waiters=${count} acquired=${acquired} ${action}`);13}1415remediate(waiters1);

  1. waiters ← 3, guardLimit ← 2

    1const waiters→ 3 = 3;2const guardLimit→ 2 = 2;34function remediate(count) {5    const acquired = 1;6    let action = "enter";7    if (count >= 1 && count <= guardLimit) {8        action = "backoff";9    } else if (count > guardLimit) {10        action = "page";11    }12    console.log(`waiters=${count} acquired=${acquired} ${action}`);13}1415remediate(waiters3);

  2. acquired ← 1, action ← enter

    1const waiters = 3;2const guardLimit = 2;34function remediate(count3) {5    const acquired→ 1 = 1;6    let action→ enter = "enter";7    if (count >= 1 && count <= guardLimit) {

  3. if (count > guardLimit)

    8    action = "backoff";9} else if (count3 > guardLimit2) {10    action = "page";11}

  4. console.log(`waiters=${count} acquired=${acquired} ${action}`);

    10        action = "page";11    }12    console.log(`waiters=${count3} acquired=${acquired1} ${actionpage}`);13}
    outputwaiters=3 acquired=1 page

  5. remediate(waiters);

    12    console.log(`waiters=${count} acquired=${acquired} ${action}`);13}1415remediate(waiters3);