tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Frame-onStep-async-01.js (978B)

      1 // Stepping works across `await` in async functions.
      2 
      3 // Set up debuggee.
      4 var g = newGlobal({newCompartment: true});
      5 g.log = "";
      6 g.eval(`                              // line 1
      7 async function aloop() {              // 2
      8    for (let i = 0; i < 3; i++) {     // 3
      9        await i;                      // 4
     10        log += " ";                   // 5
     11    }                                 // 6
     12    log += "^";                       // 7
     13 }                                     // 8
     14 `);
     15 
     16 // Set up debugger.
     17 let previousLine = -1;
     18 let dbg = new Debugger(g);
     19 dbg.onEnterFrame = frame => {
     20    frame.onStep = function () {
     21        assertEq(this, frame);
     22        let line = frame.script.getOffsetLocation(frame.offset).lineNumber;
     23        if (previousLine != line) {
     24            g.log += line; // We stepped to a new line.
     25            previousLine = line;
     26        }
     27    };
     28    dbg.onEnterFrame = undefined;
     29 };
     30 
     31 // Run.
     32 g.aloop();
     33 drainJobQueue();
     34 
     35 assertEq(g.log, "2345 345 345 37^8");