tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Script-startLine.js (1971B)

      1 var g = newGlobal({newCompartment: true});
      2 var dbg = Debugger(g);
      3 var start, count;
      4 dbg.onDebuggerStatement = function (frame) {
      5    assertEq(start, undefined);
      6    start = frame.script.startLine;
      7    count = frame.script.lineCount;
      8    assertEq(typeof frame.script.url, 'string');
      9 };
     10 
     11 function test(f, manualCount) {
     12    start = count = g.first = g.last = undefined;
     13    f();
     14    if (manualCount)
     15        g.last = g.first + manualCount - 1;
     16    assertEq(start, g.first);
     17    assertEq(count, g.last + 1 - g.first);
     18    print(start, count);
     19 }
     20 
     21 test(function () {
     22    g.eval("first = Error().lineNumber;\n" +
     23           "debugger;\n" +
     24           "last = Error().lineNumber;");
     25 });
     26 
     27 test(function () {
     28    g.evaluate("first = Error().lineNumber;\n" +
     29               "debugger;\n" +
     30               Array(17000).join("\n") +
     31               "last = Error().lineNumber;");
     32 });
     33 
     34 test(function () {
     35    g.eval("function f1() { first = Error().lineNumber\n" +
     36           "    debugger;\n" +
     37           "    last = Error().lineNumber; }\n" +
     38           "f1();");
     39 });
     40 
     41 g.eval("function f2() {\n" +
     42       "    eval('first = Error().lineNumber\\n\\ndebugger;\\n\\nlast = Error().lineNumber;');\n" +
     43       "}\n");
     44 test(g.f2);
     45 test(g.f2);
     46 
     47 // Having a last = Error().lineNumber forces a setline srcnote, so test a
     48 // function that ends with newline srcnotes.
     49 g.eval("/* Any copyright is dedicated to the Public Domain.\n" +
     50       " http://creativecommons.org/publicdomain/zero/1.0/ */\n" +
     51       "\n" +
     52       "function secondCall() { first = Error().lineNumber;\n" +
     53       "    debugger;\n" +
     54       "    // Comment\n" +
     55       "    eval(\"42;\");\n" +
     56       "    function foo() {}\n" +
     57       "    if (true) {\n" +
     58       "        foo();\n" +
     59       // The "missing" newline here is a trick to make a newline
     60       // source note come at the end.  A real newline between the two
     61       // closing braces causes a setline note instead.
     62       "    } }");
     63 test(g.secondCall, 8);