зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1842441 - Part 4: Add the documentation and testcase for conflicting names in bindings object and variables. r=jandem
Also fixed the wrong order of environment chain in E.1. direct eval case. Depends on D183133 Differential Revision: https://phabricator.services.mozilla.com/D183134
This commit is contained in:
Tooru Fujisawa
Родитель
ad1239d42e
Коммит
dba24f36ef
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@ -12,9 +12,13 @@ dbg.onEnterFrame = frame => {
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const bindings = {
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bindings_prop: 50,
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bindings_prop_var: 61,
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bindings_prop_lexical: 71,
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bindings_prop_unqualified: 81,
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};
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const envs = JSON.parse(frame.evalWithBindings(`
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const {envs, vars} = JSON.parse(frame.evalWithBindings(`
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// Put direct eval to de-optimize lexical.
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eval("");
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var qualified = 10;
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@ -22,6 +26,16 @@ unqualified = 20;
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let lexical = 30;
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this.prop = 40;
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var bindings_prop_var = 60;
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let bindings_prop_lexical = 70;
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bindings_prop_unqualified = 80;
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const vars = {
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bindings_prop_var,
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bindings_prop_lexical,
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bindings_prop_unqualified,
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};
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const envs = [];
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let env = getInnerMostEnvironmentObject();
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while (env) {
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@ -32,13 +46,34 @@ while (env) {
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lexical: !!Object.getOwnPropertyDescriptor(env, "lexical"),
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prop: !!Object.getOwnPropertyDescriptor(env, "prop"),
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bindings_prop: !!Object.getOwnPropertyDescriptor(env, "bindings_prop"),
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bindings_prop_var: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_var"),
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bindings_prop_var_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_var")?.value,
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bindings_prop_lexical: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical"),
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bindings_prop_lexical_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical")?.value,
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bindings_prop_unqualified: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_unqualified"),
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bindings_prop_unqualified_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_unqualified")?.value,
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});
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env = getEnclosingEnvironmentObject(env);
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}
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JSON.stringify(envs);
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JSON.stringify({envs, vars});
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`, bindings).return);
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assertEq(vars.bindings_prop_var, 60,
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"qualified var should read the value set by the declaration");
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assertEq(vars.bindings_prop_lexical, 70,
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"lexical should read the value set by the declaration");
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assertEq(vars.bindings_prop_unqualified, 80,
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"unqualified name should read the value set by the assignment");
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assertEq(bindings.bindings_prop_var, 61,
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"the original bindings property must not be overwritten for var");
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assertEq(bindings.bindings_prop_lexical, 71,
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"the original bindings property must not be overwritten for lexical");
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assertEq(bindings.bindings_prop_unqualified, 81,
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"the original bindings property must not be overwritten for unqualified");
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assertEq(envs.length, 5);
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let i = 0, env;
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@ -50,6 +85,12 @@ JSON.stringify(envs);
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assertEq(env.lexical, true, "lexical must live in the BlockLexicalEnvironmentObject");
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assertEq(env.prop, false);
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assertEq(env.bindings_prop_var, false);
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assertEq(env.bindings_prop_lexical, true,
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"lexical must live in the BlockLexicalEnvironmentObject even if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_lexical_value, 70);
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assertEq(env.bindings_prop_unqualified, false);
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env = envs[i]; i++;
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assertEq(env.type, "WithEnvironmentObject");
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assertEq(env.qualified, false);
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@ -58,6 +99,19 @@ JSON.stringify(envs);
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assertEq(env.prop, false);
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assertEq(env.bindings_prop, true, "bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_var, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_var_value, 60,
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"bindings property must be overwritten for var");
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assertEq(env.bindings_prop_lexical, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_lexical_value, 71,
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"bindings property must not be overwritten for lexical");
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assertEq(env.bindings_prop_unqualified, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_unqualified_value, 80,
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"bindings property must not be overwritten for unqualified");
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env = envs[i]; i++;
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assertEq(env.type, "[DebugProxy] CallObject");
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assertEq(env.qualified, true, "qualified var must live in the CallObject");
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@ -66,6 +120,13 @@ JSON.stringify(envs);
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assertEq(env.prop, false);
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assertEq(env.bindings_prop, false);
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assertEq(env.bindings_prop_var, true,
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"qualified var binding must be created in the CallObject even if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_var_value, undefined,
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"qualified var value must not be set if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_lexical, false);
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assertEq(env.bindings_prop_unqualified, false);
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env = envs[i]; i++;
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assertEq(env.type, "[DebugProxy] GlobalLexicalEnvironmentObject");
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assertEq(env.qualified, false);
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@ -74,6 +135,10 @@ JSON.stringify(envs);
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assertEq(env.prop, false);
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assertEq(env.bindings_prop, false);
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assertEq(env.bindings_prop_var, false);
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assertEq(env.bindings_prop_lexical, false);
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assertEq(env.bindings_prop_unqualified, false);
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env = envs[i]; i++;
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assertEq(env.type, "*global*");
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assertEq(env.qualified, false);
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@ -81,6 +146,10 @@ JSON.stringify(envs);
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assertEq(env.lexical, false);
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assertEq(env.prop, true, "this property must live in the global");
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assertEq(env.bindings_prop, false);
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assertEq(env.bindings_prop_var, false);
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assertEq(env.bindings_prop_lexical, false);
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assertEq(env.bindings_prop_unqualified, false);
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};
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g.eval(`
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@ -12,14 +12,28 @@ dbg.onEnterFrame = frame => {
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const bindings = {
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bindings_prop: 50,
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bindings_prop_var: 61,
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bindings_prop_lexical: 71,
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bindings_prop_unqualified: 81,
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};
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const envs = JSON.parse(frame.evalWithBindings(`
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const {envs, vars} = JSON.parse(frame.evalWithBindings(`
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var qualified = 10;
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unqualified = 20;
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let lexical = 30;
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this.prop = 40;
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var bindings_prop_var = 60;
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let bindings_prop_lexical = 70;
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bindings_prop_unqualified = 80;
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const vars = {
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bindings_prop_var,
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bindings_prop_lexical,
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bindings_prop_unqualified,
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};
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const envs = [];
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let env = getInnerMostEnvironmentObject();
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while (env) {
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@ -30,18 +44,40 @@ while (env) {
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lexical: !!Object.getOwnPropertyDescriptor(env, "lexical"),
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prop: !!Object.getOwnPropertyDescriptor(env, "prop"),
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bindings_prop: !!Object.getOwnPropertyDescriptor(env, "bindings_prop"),
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bindings_prop_var: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_var"),
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bindings_prop_var_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_var")?.value,
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bindings_prop_lexical: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical"),
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bindings_prop_lexical_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical")?.value,
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bindings_prop_unqualified: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_unqualified"),
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bindings_prop_unqualified_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_unqualified")?.value,
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});
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env = getEnclosingEnvironmentObject(env);
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}
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JSON.stringify(envs);
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JSON.stringify({envs, vars});
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`, bindings).return);
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assertEq(vars.bindings_prop_var, 60,
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"qualified var should read the value set by the declaration");
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assertEq(vars.bindings_prop_lexical, 70,
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"lexical should read the value set by the declaration");
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assertEq(vars.bindings_prop_unqualified, 80,
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"unqualified name should read the value set by the assignment");
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assertEq(bindings.bindings_prop_var, 61,
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"the original bindings property must not be overwritten for var");
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assertEq(bindings.bindings_prop_lexical, 71,
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"the original bindings property must not be overwritten for lexical");
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assertEq(bindings.bindings_prop_unqualified, 81,
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"the original bindings property must not be overwritten for unqualified");
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assertEq(envs.length, 4);
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let i = 0, env;
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// NOTE: lexical is optimized and uses frame slot.
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// NOTE: lexical is optimized and uses frame slot, even if it conflicts with
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// bindings object properties.
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env = envs[i]; i++;
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assertEq(env.type, "WithEnvironmentObject");
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@ -51,6 +87,19 @@ JSON.stringify(envs);
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assertEq(env.prop, false);
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assertEq(env.bindings_prop, true, "bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_var, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_var_value, 60,
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"bindings property must be overwritten for var");
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assertEq(env.bindings_prop_lexical, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_lexical_value, 71,
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"bindings property must not be overwritten for lexical");
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assertEq(env.bindings_prop_unqualified, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_unqualified_value, 80,
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"bindings property must be overwritten for unqualified");
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env = envs[i]; i++;
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assertEq(env.type, "[DebugProxy] CallObject");
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assertEq(env.qualified, true, "qualified var must live in the CallObject");
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@ -59,6 +108,13 @@ JSON.stringify(envs);
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assertEq(env.prop, false);
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assertEq(env.bindings_prop, false);
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assertEq(env.bindings_prop_var, true,
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"qualified var binding must be created in the CallObject even if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_var_value, undefined,
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"qualified var value must not be set if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_lexical, false);
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assertEq(env.bindings_prop_unqualified, false);
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env = envs[i]; i++;
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assertEq(env.type, "[DebugProxy] GlobalLexicalEnvironmentObject");
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assertEq(env.qualified, false);
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@ -67,6 +123,10 @@ JSON.stringify(envs);
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assertEq(env.prop, false);
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assertEq(env.bindings_prop, false);
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assertEq(env.bindings_prop_var, false);
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assertEq(env.bindings_prop_lexical, false);
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assertEq(env.bindings_prop_unqualified, false);
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env = envs[i]; i++;
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assertEq(env.type, "*global*");
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assertEq(env.qualified, false);
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@ -74,6 +134,10 @@ JSON.stringify(envs);
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assertEq(env.lexical, false);
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assertEq(env.prop, true, "this property must live in the global");
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assertEq(env.bindings_prop, false);
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assertEq(env.bindings_prop_var, false);
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assertEq(env.bindings_prop_lexical, false);
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assertEq(env.bindings_prop_unqualified, false);
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};
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g.eval(`
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@ -7,14 +7,32 @@ const gw = dbg.addDebuggee(g);
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const bindings = {
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bindings_prop: 50,
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bindings_prop_var: 61,
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bindings_prop_lexical: 71,
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bindings_prop_lexical2: 71,
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bindings_prop_unqualified: 81,
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};
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const envs = JSON.parse(gw.executeInGlobalWithBindings(`
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const {envs, vars} = JSON.parse(gw.executeInGlobalWithBindings(`
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var qualified = 10;
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unqualified = 20;
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let lexical = 30;
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this.prop = 40;
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var bindings_prop_var = 60;
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let bindings_prop_lexical = 70;
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let bindings_prop_lexical2;
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bindings_prop_lexical2 = 70;
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bindings_prop_unqualified = 80;
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const vars = {
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bindings_prop_var,
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bindings_prop_lexical,
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bindings_prop_lexical2,
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bindings_prop_unqualified,
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};
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const envs = [];
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let env = getInnerMostEnvironmentObject();
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while (env) {
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@ -25,13 +43,40 @@ while (env) {
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lexical: !!Object.getOwnPropertyDescriptor(env, "lexical"),
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prop: !!Object.getOwnPropertyDescriptor(env, "prop"),
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bindings_prop: !!Object.getOwnPropertyDescriptor(env, "bindings_prop"),
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bindings_prop_var: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_var"),
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bindings_prop_var_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_var")?.value,
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bindings_prop_lexical: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical"),
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bindings_prop_lexical_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical")?.value,
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bindings_prop_lexical2: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical2"),
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bindings_prop_lexical2_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_lexical2")?.value,
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bindings_prop_unqualified: !!Object.getOwnPropertyDescriptor(env, "bindings_prop_unqualified"),
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bindings_prop_unqualified_value: Object.getOwnPropertyDescriptor(env, "bindings_prop_unqualified")?.value,
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});
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env = getEnclosingEnvironmentObject(env);
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}
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JSON.stringify(envs);
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JSON.stringify({envs, vars});
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`, bindings).return);
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assertEq(vars.bindings_prop_var, 60,
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"qualified var should read the value set by the declaration");
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assertEq(vars.bindings_prop_lexical, 71,
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"TODO: lexical variable cannot read the value set by the declaration, given the name lookup finds the WithEnvironmentObject first");
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assertEq(vars.bindings_prop_lexical2, 70,
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"lexical should read the value set by the assignment");
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assertEq(vars.bindings_prop_unqualified, 80,
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"unqualified name should read the value set by the assignment");
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assertEq(bindings.bindings_prop_var, 61,
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"the original bindings property must not be overwritten for var");
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assertEq(bindings.bindings_prop_lexical, 71,
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"the original bindings property must not be overwritten for lexical");
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assertEq(bindings.bindings_prop_lexical2, 71,
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"the original bindings property must not be overwritten for lexical");
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assertEq(bindings.bindings_prop_unqualified, 81,
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"the original bindings property must not be overwritten for unqualified");
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assertEq(envs.length, 3);
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let i = 0, env;
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@ -44,6 +89,23 @@ assertEq(env.lexical, false);
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assertEq(env.prop, false);
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assertEq(env.bindings_prop, true, "bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_var, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_var_value, 60,
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"bindings property must be overwritten for var");
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assertEq(env.bindings_prop_lexical, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_lexical_value, 71,
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"bindings property must not be overwritten for lexical declaration");
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assertEq(env.bindings_prop_lexical2, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_lexical2_value, 70,
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"bindings property must be overwritten for assignment on lexical");
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assertEq(env.bindings_prop_unqualified, true,
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"bindings property must live in the with env for bindings");
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assertEq(env.bindings_prop_unqualified_value, 80,
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"bindings property must not be overwritten for unqualified");
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env = envs[i]; i++;
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assertEq(env.type, "GlobalLexicalEnvironmentObject");
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assertEq(env.qualified, false);
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@ -52,6 +114,16 @@ assertEq(env.lexical, true, "lexical must live in the GlobalLexicalEnvironmentOb
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assertEq(env.prop, false);
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assertEq(env.bindings_prop, false);
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assertEq(env.bindings_prop_var, false);
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assertEq(env.bindings_prop_lexical, true,
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"lexical must live in the GlobalLexicalEnvironmentObject even if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_lexical_value, 70);
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assertEq(env.bindings_prop_lexical2, true,
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"lexical must live in the GlobalLexicalEnvironmentObject even if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_lexical2_value, undefined,
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"lexical value must not be set by the assignment if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_unqualified, false);
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env = envs[i]; i++;
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assertEq(env.type, "*global*");
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assertEq(env.qualified, true, "qualified var must live in the global");
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@ -59,3 +131,12 @@ assertEq(env.unqualified, true, "unqualified name must live in the global");
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assertEq(env.lexical, false);
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assertEq(env.prop, true, "this property must live in the global");
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assertEq(env.bindings_prop, false);
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assertEq(env.bindings_prop_var, true,
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"qualified var binding must be created in the global even if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_var_value, undefined,
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"qualified var value must not be set if it conflicts with the bindings object property");
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assertEq(env.bindings_prop_var_value, undefined);
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assertEq(env.bindings_prop_lexical, false);
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assertEq(env.bindings_prop_lexical2, false);
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assertEq(env.bindings_prop_unqualified, false);
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|
|
@ -374,10 +374,14 @@ extern PropertyName* EnvironmentCoordinateNameSlow(JSScript* script,
|
|||
* E.1. Debugger.Frame.prototype.evalWithBindings
|
||||
*
|
||||
* Debugger.Frame.prototype.evalWithBindings uses WithEnvironmentObject for
|
||||
* given bindings, and the frame's enclosing scope
|
||||
* given bindings, and the frame's enclosing scope.
|
||||
*
|
||||
* If qualified 'var's or unqualified names conflict with the bindings object's
|
||||
* properties, they go to the WithEnvironmentObject.
|
||||
*
|
||||
* If the frame is function, it has the following env chain.
|
||||
* lexical variables are optimized and uses frame slots:
|
||||
* lexical variables are optimized and uses frame slots, regardless of the name
|
||||
* conflicts with bindings:
|
||||
*
|
||||
* global (unqualified names)
|
||||
* |
|
||||
|
|
@ -385,7 +389,7 @@ extern PropertyName* EnvironmentCoordinateNameSlow(JSScript* script,
|
|||
* |
|
||||
* [DebugProxy] CallObject (qualified 'var's)
|
||||
* |
|
||||
* WithEnvironmentObject wrapping bindings
|
||||
* WithEnvironmentObject wrapping bindings (conflicting 'var's and names)
|
||||
*
|
||||
* If the script has direct eval, BlockLexicalEnvironmentObject is created for
|
||||
* it:
|
||||
|
|
@ -396,9 +400,9 @@ extern PropertyName* EnvironmentCoordinateNameSlow(JSScript* script,
|
|||
* |
|
||||
* [DebugProxy] CallObject (qualified 'var's)
|
||||
* |
|
||||
* BlockLexicalEnvironmentObject (lexical)
|
||||
* WithEnvironmentObject wrapping bindings (conflicting 'var's and names)
|
||||
* |
|
||||
* WithEnvironmentObject wrapping bindings
|
||||
* BlockLexicalEnvironmentObject (lexical vars, and conflicting lexical vars)
|
||||
*
|
||||
* NOTE: Debugger.Frame.prototype.eval uses the frame's enclosing scope only,
|
||||
* and it doesn't use any dynamic environment, but still uses
|
||||
|
|
@ -407,13 +411,30 @@ extern PropertyName* EnvironmentCoordinateNameSlow(JSScript* script,
|
|||
* E.2. Debugger.Object.prototype.executeInGlobalWithBindings
|
||||
*
|
||||
* Debugger.Object.prototype.executeInGlobalWithBindings uses
|
||||
* WithEnvironmentObject for given bindings, and the object's global scope:
|
||||
* WithEnvironmentObject for given bindings, and the object's global scope.
|
||||
*
|
||||
* If qualified 'var's or unqualified names conflict with the bindings object's
|
||||
* properties, they go to the WithEnvironmentObject.
|
||||
*
|
||||
* global (qualified 'var's and unqualified names)
|
||||
* |
|
||||
* GlobalLexicalEnvironmentObject[this=global] (lexical)
|
||||
* GlobalLexicalEnvironmentObject[this=global] (lexical vars and conflicting)
|
||||
* |
|
||||
* WithEnvironmentObject wrapping bindings
|
||||
* WithEnvironmentObject wrapping bindings (conflicting 'var's and names)
|
||||
*
|
||||
* TODO:
|
||||
* If lexical variable names conflict with the bindings object's
|
||||
* properties, the write on them within declarations is done for the
|
||||
* GlobalLexicalEnvironmentObject,
|
||||
* but the write within assignments and the read on lexicals are done from the
|
||||
* WithEnvironmentObject (bug 1841964).
|
||||
*
|
||||
* // bindings = { x: 10, y: 20 };
|
||||
*
|
||||
* let x = 11; // written to GlobalLexicalEnvironmentObject
|
||||
* x; // read from WithEnvironmentObject
|
||||
* y = 21; // written to WithEnvironmentObject
|
||||
* y; // read from WithEnvironmentObject
|
||||
*
|
||||
* NOTE: Debugger.Object.prototype.executeInGlobal uses the object's global
|
||||
* scope only, and it doesn't use any dynamic environment or
|
||||
|
|
|
|||
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