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// Test how stepping interacts with for(;;) statements.
let g = newGlobal({newCompartment: true});
// We want a for(;;) loop whose body is evaluated at least once, to
// see whether the loop head is hit a second time.
g.eval(`function f() {
let x = 0;
debugger; // +0
for(;;) { // +1
if (x++ == 1) break; // +2
} // +3
debugger; // +4
}`);
let dbg = Debugger(g);
function test(s, expected) {
let result = '';
dbg.onDebuggerStatement = function(frame) {
// On the second debugger statement, we're done.
dbg.onDebuggerStatement = function(frame) {
frame.onStep = undefined;
};
let debugLine = frame.script.getOffsetLocation(frame.offset).lineNumber;
frame.onStep = function() {
// Only examine stops at entry points for the line.
let lineNo = this.script.getOffsetLocation(this.offset).lineNumber;
if (this.script.getLineOffsets(lineNo).indexOf(this.offset) < 0) {
return undefined;
}
let delta = this.script.getOffsetLocation(this.offset).lineNumber - debugLine;
result += delta;
};
};
g.eval(s);
assertEq(result, expected);
}
test('f()', '2124');