tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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bug1782003.js (840B)

      1 function getStack() {
      2    enableGeckoProfiling();
      3    let stack = readGeckoProfilingStack();
      4    // The number of frames depends on JIT flags, but there must be at least
      5    // one frame for the caller and at most 3 total (the global script, 'testFun'
      6    // and 'getStack').
      7    assertEq(stack.length > 0, true);
      8    assertEq(stack.length <= 3, true);
      9    assertEq(JSON.stringify(stack).includes('"testFun ('), true);
     10    disableGeckoProfiling();
     11 }
     12 function testFun() {
     13    // Loop until this is a JIT frame.
     14    while (true) {
     15        let isJitFrame = inJit();
     16        if (typeof isJitFrame === "string") {
     17            return; // JIT disabled.
     18        }
     19        if (isJitFrame) {
     20            break;
     21        }
     22    }
     23 
     24    // Now call getStack to check this frame is on the profiler's JIT stack.
     25    getStack();
     26    getStack();
     27 }
     28 testFun();