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// Verify the environment chain for Debugger.Frame described in
// js/src/vm/EnvironmentObject.h.
const g = newGlobal({ newCompartment: true });
const dbg = Debugger(g);
dbg.onEnterFrame = frame => {
if (frame.script.displayName !== "target") {
return;
}
dbg.onEnterFrame = () => {};
const bindings = {
bindings_prop: 50,
};
const envs = JSON.parse(frame.evalWithBindings(`
var qualified = 10;
unqualified = 20;
let lexical = 30;
this.prop = 40;
const envs = [];
let env = getInnerMostEnvironmentObject();
while (env) {
envs.push({
type: getEnvironmentObjectType(env) || "*global*",
qualified: !!Object.getOwnPropertyDescriptor(env, "qualified"),
unqualified: !!Object.getOwnPropertyDescriptor(env, "unqualified"),
lexical: !!Object.getOwnPropertyDescriptor(env, "lexical"),
prop: !!Object.getOwnPropertyDescriptor(env, "prop"),
bindings_prop: !!Object.getOwnPropertyDescriptor(env, "bindings_prop"),
});
env = getEnclosingEnvironmentObject(env);
}
JSON.stringify(envs);
`, bindings).return);
assertEq(envs.length, 4);
let i = 0, env;
// NOTE: lexical is optimized and uses frame slot.
env = envs[i]; i++;
assertEq(env.type, "WithEnvironmentObject");
assertEq(env.qualified, false);
assertEq(env.unqualified, false);
assertEq(env.lexical, false);
assertEq(env.prop, false);
assertEq(env.bindings_prop, true, "bindings property must live in the with env for bindings");
env = envs[i]; i++;
assertEq(env.type, "[DebugProxy] CallObject");
assertEq(env.qualified, true, "qualified var must live in the CallObject");
assertEq(env.unqualified, false);
assertEq(env.lexical, false);
assertEq(env.prop, false);
assertEq(env.bindings_prop, false);
env = envs[i]; i++;
assertEq(env.type, "[DebugProxy] GlobalLexicalEnvironmentObject");
assertEq(env.qualified, false);
assertEq(env.unqualified, false);
assertEq(env.lexical, false);
assertEq(env.prop, false);
assertEq(env.bindings_prop, false);
env = envs[i]; i++;
assertEq(env.type, "*global*");
assertEq(env.qualified, false);
assertEq(env.unqualified, true, "unqualified name must live in the global");
assertEq(env.lexical, false);
assertEq(env.prop, true, "this property must live in the global");
assertEq(env.bindings_prop, false);
};
g.eval(`
function target() {
}
target();
`);
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