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-rw-r--r--js/src/frontend/BytecodeCompiler.cpp127
-rw-r--r--js/src/frontend/BytecodeCompiler.h41
-rw-r--r--js/src/frontend/Parser.cpp55
-rw-r--r--js/src/frontend/Parser.h16
-rw-r--r--js/src/jit-test/tests/basic/destructuring-default.js5
-rw-r--r--js/src/jit-test/tests/basic/destructuring-rest.js7
-rw-r--r--js/src/jit-test/tests/debug/Script-gc-02.js2
-rw-r--r--js/src/jit-test/tests/debug/Script-gc-03.js2
-rw-r--r--js/src/jit-test/tests/debug/Script-sourceStart-04.js4
-rw-r--r--js/src/js.msg1
-rw-r--r--js/src/jsapi.cpp70
-rw-r--r--js/src/jsfun.cpp264
-rw-r--r--js/src/jsfun.h5
-rw-r--r--js/src/jsscript.cpp27
-rw-r--r--js/src/jsscript.h28
-rw-r--r--js/src/tests/ecma_6/Function/invalid-parameter-list.js27
-rw-r--r--js/src/vm/Debugger.cpp9
-rw-r--r--js/src/wasm/AsmJS.cpp75
-rw-r--r--js/xpconnect/loader/mozJSSubScriptLoader.cpp4
19 files changed, 317 insertions, 452 deletions
diff --git a/js/src/frontend/BytecodeCompiler.cpp b/js/src/frontend/BytecodeCompiler.cpp
index d4c758b6c..3fbfdaa1a 100644
--- a/js/src/frontend/BytecodeCompiler.cpp
+++ b/js/src/frontend/BytecodeCompiler.cpp
@@ -7,6 +7,7 @@
#include "frontend/BytecodeCompiler.h"
#include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/Maybe.h"
#include "jscntxt.h"
#include "jsscript.h"
@@ -28,6 +29,7 @@
using namespace js;
using namespace js::frontend;
using mozilla::Maybe;
+using mozilla::Nothing;
class MOZ_STACK_CLASS AutoCompilationTraceLogger
{
@@ -57,24 +59,24 @@ class MOZ_STACK_CLASS BytecodeCompiler
// Call setters for optional arguments.
void maybeSetSourceCompressor(SourceCompressionTask* sourceCompressor);
- void setSourceArgumentsNotIncluded();
JSScript* compileGlobalScript(ScopeKind scopeKind);
JSScript* compileEvalScript(HandleObject environment, HandleScope enclosingScope);
ModuleObject* compileModule();
- bool compileFunctionBody(MutableHandleFunction fun, Handle<PropertyNameVector> formals,
- GeneratorKind generatorKind, FunctionAsyncKind asyncKind);
+ bool compileStandaloneFunction(MutableHandleFunction fun, GeneratorKind generatorKind,
+ FunctionAsyncKind asyncKind,
+ Maybe<uint32_t> parameterListEnd);
ScriptSourceObject* sourceObjectPtr() const;
private:
JSScript* compileScript(HandleObject environment, SharedContext* sc);
bool checkLength();
- bool createScriptSource();
+ bool createScriptSource(Maybe<uint32_t> parameterListEnd);
bool maybeCompressSource();
bool canLazilyParse();
bool createParser();
- bool createSourceAndParser();
+ bool createSourceAndParser(Maybe<uint32_t> parameterListEnd = Nothing());
bool createScript();
bool emplaceEmitter(Maybe<BytecodeEmitter>& emitter, SharedContext* sharedContext);
bool handleParseFailure(const Directives& newDirectives);
@@ -90,7 +92,6 @@ class MOZ_STACK_CLASS BytecodeCompiler
SourceBufferHolder& sourceBuffer;
RootedScope enclosingScope;
- bool sourceArgumentsNotIncluded;
RootedScriptSource sourceObject;
ScriptSource* scriptSource;
@@ -130,7 +131,6 @@ BytecodeCompiler::BytecodeCompiler(ExclusiveContext* cx,
options(options),
sourceBuffer(sourceBuffer),
enclosingScope(cx, enclosingScope),
- sourceArgumentsNotIncluded(false),
sourceObject(cx),
scriptSource(nullptr),
sourceCompressor(nullptr),
@@ -147,12 +147,6 @@ BytecodeCompiler::maybeSetSourceCompressor(SourceCompressionTask* sourceCompress
this->sourceCompressor = sourceCompressor;
}
-void
-BytecodeCompiler::setSourceArgumentsNotIncluded()
-{
- sourceArgumentsNotIncluded = true;
-}
-
bool
BytecodeCompiler::checkLength()
{
@@ -169,12 +163,12 @@ BytecodeCompiler::checkLength()
}
bool
-BytecodeCompiler::createScriptSource()
+BytecodeCompiler::createScriptSource(Maybe<uint32_t> parameterListEnd)
{
if (!checkLength())
return false;
- sourceObject = CreateScriptSourceObject(cx, options);
+ sourceObject = CreateScriptSourceObject(cx, options, parameterListEnd);
if (!sourceObject)
return false;
@@ -193,9 +187,7 @@ BytecodeCompiler::maybeCompressSource()
if (!cx->compartment()->behaviors().discardSource()) {
if (options.sourceIsLazy) {
scriptSource->setSourceRetrievable();
- } else if (!scriptSource->setSourceCopy(cx, sourceBuffer, sourceArgumentsNotIncluded,
- sourceCompressor))
- {
+ } else if (!scriptSource->setSourceCopy(cx, sourceBuffer, sourceCompressor)) {
return false;
}
}
@@ -242,9 +234,9 @@ BytecodeCompiler::createParser()
}
bool
-BytecodeCompiler::createSourceAndParser()
+BytecodeCompiler::createSourceAndParser(Maybe<uint32_t> parameterListEnd /* = Nothing() */)
{
- return createScriptSource() &&
+ return createScriptSource(parameterListEnd) &&
maybeCompressSource() &&
createParser();
}
@@ -432,18 +424,19 @@ BytecodeCompiler::compileModule()
return module;
}
+// Compile a standalone JS function, which might appear as the value of an
+// event handler attribute in an HTML <INPUT> tag, or in a Function()
+// constructor.
bool
-BytecodeCompiler::compileFunctionBody(MutableHandleFunction fun,
- Handle<PropertyNameVector> formals,
- GeneratorKind generatorKind,
- FunctionAsyncKind asyncKind)
+BytecodeCompiler::compileStandaloneFunction(MutableHandleFunction fun,
+ GeneratorKind generatorKind,
+ FunctionAsyncKind asyncKind,
+ Maybe<uint32_t> parameterListEnd)
{
MOZ_ASSERT(fun);
MOZ_ASSERT(fun->isTenured());
- fun->setArgCount(formals.length());
-
- if (!createSourceAndParser())
+ if (!createSourceAndParser(parameterListEnd))
return false;
// Speculatively parse using the default directives implied by the context.
@@ -454,8 +447,8 @@ BytecodeCompiler::compileFunctionBody(MutableHandleFunction fun,
ParseNode* fn;
do {
Directives newDirectives = directives;
- fn = parser->standaloneFunctionBody(fun, enclosingScope, formals, generatorKind, asyncKind,
- directives, &newDirectives);
+ fn = parser->standaloneFunction(fun, enclosingScope, parameterListEnd, generatorKind,
+ asyncKind, directives, &newDirectives);
if (!fn && !handleParseFailure(newDirectives))
return false;
} while (!fn);
@@ -492,14 +485,15 @@ BytecodeCompiler::sourceObjectPtr() const
}
ScriptSourceObject*
-frontend::CreateScriptSourceObject(ExclusiveContext* cx, const ReadOnlyCompileOptions& options)
+frontend::CreateScriptSourceObject(ExclusiveContext* cx, const ReadOnlyCompileOptions& options,
+ Maybe<uint32_t> parameterListEnd /* = Nothing() */)
{
ScriptSource* ss = cx->new_<ScriptSource>();
if (!ss)
return nullptr;
ScriptSourceHolder ssHolder(ss);
- if (!ss->initFromOptions(cx, options))
+ if (!ss->initFromOptions(cx, options, parameterListEnd))
return nullptr;
RootedScriptSource sso(cx, ScriptSourceObject::create(cx, ss));
@@ -676,63 +670,44 @@ frontend::CompileLazyFunction(JSContext* cx, Handle<LazyScript*> lazy, const cha
return bce.emitFunctionScript(pn->pn_body);
}
-// Compile a JS function body, which might appear as the value of an event
-// handler attribute in an HTML <INPUT> tag, or in a Function() constructor.
-static bool
-CompileFunctionBody(JSContext* cx, MutableHandleFunction fun, const ReadOnlyCompileOptions& options,
- Handle<PropertyNameVector> formals, SourceBufferHolder& srcBuf,
- HandleScope enclosingScope, GeneratorKind generatorKind,
- FunctionAsyncKind asyncKind)
+bool
+frontend::CompileStandaloneFunction(JSContext* cx, MutableHandleFunction fun,
+ const ReadOnlyCompileOptions& options,
+ JS::SourceBufferHolder& srcBuf,
+ Maybe<uint32_t> parameterListEnd,
+ HandleScope enclosingScope /* = nullptr */)
{
- MOZ_ASSERT(!options.isRunOnce);
-
- // FIXME: make Function pass in two strings and parse them as arguments and
- // ProgramElements respectively.
+ RootedScope scope(cx, enclosingScope);
+ if (!scope)
+ scope = &cx->global()->emptyGlobalScope();
- BytecodeCompiler compiler(cx, cx->tempLifoAlloc(), options, srcBuf, enclosingScope,
+ BytecodeCompiler compiler(cx, cx->tempLifoAlloc(), options, srcBuf, scope,
TraceLogger_ParserCompileFunction);
- compiler.setSourceArgumentsNotIncluded();
- return compiler.compileFunctionBody(fun, formals, generatorKind, asyncKind);
+ return compiler.compileStandaloneFunction(fun, NotGenerator, SyncFunction, parameterListEnd);
}
bool
-frontend::CompileFunctionBody(JSContext* cx, MutableHandleFunction fun,
- const ReadOnlyCompileOptions& options,
- Handle<PropertyNameVector> formals, JS::SourceBufferHolder& srcBuf,
- HandleScope enclosingScope)
-{
- return CompileFunctionBody(cx, fun, options, formals, srcBuf, enclosingScope, NotGenerator,
- SyncFunction);
-}
-
-bool
-frontend::CompileFunctionBody(JSContext* cx, MutableHandleFunction fun,
- const ReadOnlyCompileOptions& options,
- Handle<PropertyNameVector> formals, JS::SourceBufferHolder& srcBuf)
+frontend::CompileStandaloneGenerator(JSContext* cx, MutableHandleFunction fun,
+ const ReadOnlyCompileOptions& options,
+ JS::SourceBufferHolder& srcBuf,
+ Maybe<uint32_t> parameterListEnd)
{
RootedScope emptyGlobalScope(cx, &cx->global()->emptyGlobalScope());
- return CompileFunctionBody(cx, fun, options, formals, srcBuf, emptyGlobalScope,
- NotGenerator, SyncFunction);
-}
-bool
-frontend::CompileStarGeneratorBody(JSContext* cx, MutableHandleFunction fun,
- const ReadOnlyCompileOptions& options,
- Handle<PropertyNameVector> formals,
- JS::SourceBufferHolder& srcBuf)
-{
- RootedScope emptyGlobalScope(cx, &cx->global()->emptyGlobalScope());
- return CompileFunctionBody(cx, fun, options, formals, srcBuf, emptyGlobalScope,
- StarGenerator, SyncFunction);
+ BytecodeCompiler compiler(cx, cx->tempLifoAlloc(), options, srcBuf, emptyGlobalScope,
+ TraceLogger_ParserCompileFunction);
+ return compiler.compileStandaloneFunction(fun, StarGenerator, SyncFunction, parameterListEnd);
}
bool
-frontend::CompileAsyncFunctionBody(JSContext* cx, MutableHandleFunction fun,
- const ReadOnlyCompileOptions& options,
- Handle<PropertyNameVector> formals,
- JS::SourceBufferHolder& srcBuf)
+frontend::CompileStandaloneAsyncFunction(JSContext* cx, MutableHandleFunction fun,
+ const ReadOnlyCompileOptions& options,
+ JS::SourceBufferHolder& srcBuf,
+ Maybe<uint32_t> parameterListEnd)
{
RootedScope emptyGlobalScope(cx, &cx->global()->emptyGlobalScope());
- return CompileFunctionBody(cx, fun, options, formals, srcBuf, emptyGlobalScope,
- StarGenerator, AsyncFunction);
+
+ BytecodeCompiler compiler(cx, cx->tempLifoAlloc(), options, srcBuf, emptyGlobalScope,
+ TraceLogger_ParserCompileFunction);
+ return compiler.compileStandaloneFunction(fun, StarGenerator, AsyncFunction, parameterListEnd);
}
diff --git a/js/src/frontend/BytecodeCompiler.h b/js/src/frontend/BytecodeCompiler.h
index 1d86f1160..72e967639 100644
--- a/js/src/frontend/BytecodeCompiler.h
+++ b/js/src/frontend/BytecodeCompiler.h
@@ -7,6 +7,8 @@
#ifndef frontend_BytecodeCompiler_h
#define frontend_BytecodeCompiler_h
+#include "mozilla/Maybe.h"
+
#include "NamespaceImports.h"
#include "vm/Scope.h"
@@ -51,22 +53,36 @@ CompileModule(ExclusiveContext* cx, const ReadOnlyCompileOptions& options,
MOZ_MUST_USE bool
CompileLazyFunction(JSContext* cx, Handle<LazyScript*> lazy, const char16_t* chars, size_t length);
+//
+// Compile a single function. The source in srcBuf must match the ECMA-262
+// FunctionExpression production.
+//
+// If nonzero, parameterListEnd is the offset within srcBuf where the parameter
+// list is expected to end. During parsing, if we find that it ends anywhere
+// else, it's a SyntaxError. This is used to implement the Function constructor;
+// it's how we detect that these weird cases are SyntaxErrors:
+//
+// Function("/*", "*/x) {")
+// Function("x){ if (3", "return x;}")
+//
MOZ_MUST_USE bool
-CompileFunctionBody(JSContext* cx, MutableHandleFunction fun,
- const ReadOnlyCompileOptions& options,
- Handle<PropertyNameVector> formals, JS::SourceBufferHolder& srcBuf,
- HandleScope enclosingScope);
+CompileStandaloneFunction(JSContext* cx, MutableHandleFunction fun,
+ const ReadOnlyCompileOptions& options,
+ JS::SourceBufferHolder& srcBuf,
+ mozilla::Maybe<uint32_t> parameterListEnd,
+ HandleScope enclosingScope = nullptr);
-// As above, but defaults to the global lexical scope as the enclosing scope.
MOZ_MUST_USE bool
-CompileFunctionBody(JSContext* cx, MutableHandleFunction fun,
- const ReadOnlyCompileOptions& options,
- Handle<PropertyNameVector> formals, JS::SourceBufferHolder& srcBuf);
+CompileStandaloneGenerator(JSContext* cx, MutableHandleFunction fun,
+ const ReadOnlyCompileOptions& options,
+ JS::SourceBufferHolder& srcBuf,
+ mozilla::Maybe<uint32_t> parameterListEnd);
MOZ_MUST_USE bool
-CompileStarGeneratorBody(JSContext* cx, MutableHandleFunction fun,
- const ReadOnlyCompileOptions& options,
- Handle<PropertyNameVector> formals, JS::SourceBufferHolder& srcBuf);
+CompileStandaloneAsyncFunction(JSContext* cx, MutableHandleFunction fun,
+ const ReadOnlyCompileOptions& options,
+ JS::SourceBufferHolder& srcBuf,
+ mozilla::Maybe<uint32_t> parameterListEnd);
MOZ_MUST_USE bool
CompileAsyncFunctionBody(JSContext* cx, MutableHandleFunction fun,
@@ -74,7 +90,8 @@ CompileAsyncFunctionBody(JSContext* cx, MutableHandleFunction fun,
Handle<PropertyNameVector> formals, JS::SourceBufferHolder& srcBuf);
ScriptSourceObject*
-CreateScriptSourceObject(ExclusiveContext* cx, const ReadOnlyCompileOptions& options);
+CreateScriptSourceObject(ExclusiveContext* cx, const ReadOnlyCompileOptions& options,
+ mozilla::Maybe<uint32_t> parameterListEnd = mozilla::Nothing());
/*
* True if str consists of an IdentifierStart character, followed by one or
diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp
index 49fef2bf9..f42546eb5 100644
--- a/js/src/frontend/Parser.cpp
+++ b/js/src/frontend/Parser.cpp
@@ -2245,13 +2245,13 @@ GetYieldHandling(GeneratorKind generatorKind, FunctionAsyncKind asyncKind)
template <>
ParseNode*
-Parser<FullParseHandler>::standaloneFunctionBody(HandleFunction fun,
- HandleScope enclosingScope,
- Handle<PropertyNameVector> formals,
- GeneratorKind generatorKind,
- FunctionAsyncKind asyncKind,
- Directives inheritedDirectives,
- Directives* newDirectives)
+Parser<FullParseHandler>::standaloneFunction(HandleFunction fun,
+ HandleScope enclosingScope,
+ Maybe<uint32_t> parameterListEnd,
+ GeneratorKind generatorKind,
+ FunctionAsyncKind asyncKind,
+ Directives inheritedDirectives,
+ Directives* newDirectives)
{
MOZ_ASSERT(checkOptionsCalled);
@@ -2274,25 +2274,14 @@ Parser<FullParseHandler>::standaloneFunctionBody(HandleFunction fun,
if (!funpc.init())
return null();
funpc.setIsStandaloneFunctionBody();
- funpc.functionScope().useAsVarScope(&funpc);
-
- if (formals.length() >= ARGNO_LIMIT) {
- report(ParseError, false, null(), JSMSG_TOO_MANY_FUN_ARGS);
- return null();
- }
-
- bool duplicatedParam = false;
- for (uint32_t i = 0; i < formals.length(); i++) {
- if (!notePositionalFormalParameter(fn, formals[i], false, &duplicatedParam))
- return null();
- }
- funbox->hasDuplicateParameters = duplicatedParam;
YieldHandling yieldHandling = GetYieldHandling(generatorKind, asyncKind);
AutoAwaitIsKeyword awaitIsKeyword(&tokenStream, asyncKind == AsyncFunction);
- ParseNode* pn = functionBody(InAllowed, yieldHandling, Statement, StatementListBody);
- if (!pn)
+ if (!functionFormalParametersAndBody(InAllowed, yieldHandling, fn, Statement,
+ parameterListEnd))
+ {
return null();
+ }
TokenKind tt;
if (!tokenStream.getToken(&tt, TokenStream::Operand))
@@ -2303,15 +2292,7 @@ Parser<FullParseHandler>::standaloneFunctionBody(HandleFunction fun,
return null();
}
- if (!FoldConstants(context, &pn, this))
- return null();
-
- fn->pn_pos.end = pos().end;
-
- MOZ_ASSERT(fn->pn_body->isKind(PNK_PARAMSBODY));
- fn->pn_body->append(pn);
-
- if (!finishFunction())
+ if (!FoldConstants(context, &fn, this))
return null();
return fn;
@@ -3415,7 +3396,8 @@ template <typename ParseHandler>
bool
Parser<ParseHandler>::functionFormalParametersAndBody(InHandling inHandling,
YieldHandling yieldHandling,
- Node pn, FunctionSyntaxKind kind)
+ Node pn, FunctionSyntaxKind kind,
+ Maybe<uint32_t> parameterListEnd /* = Nothing() */)
{
// Given a properly initialized parse context, try to parse an actual
// function without concern for conversion to strict mode, use of lazy
@@ -3447,6 +3429,13 @@ Parser<ParseHandler>::functionFormalParametersAndBody(InHandling inHandling,
}
}
+ // When parsing something for new Function() we have to make sure to
+ // only treat a certain part of the source as a parameter list.
+ if (parameterListEnd.isSome() && parameterListEnd.value() != pos().begin) {
+ report(ParseError, false, null(), JSMSG_UNEXPECTED_PARAMLIST_END);
+ return false;
+ }
+
// Parse the function body.
FunctionBodyType bodyType = StatementListBody;
TokenKind tt;
@@ -3502,7 +3491,7 @@ Parser<ParseHandler>::functionFormalParametersAndBody(InHandling inHandling,
report(ParseError, false, null(), JSMSG_CURLY_AFTER_BODY);
return false;
}
- funbox->bufEnd = pos().begin + 1;
+ funbox->bufEnd = pos().end;
} else {
#if !JS_HAS_EXPR_CLOSURES
MOZ_ASSERT(kind == Arrow);
diff --git a/js/src/frontend/Parser.h b/js/src/frontend/Parser.h
index 0ad4d56a0..b58b021cd 100644
--- a/js/src/frontend/Parser.h
+++ b/js/src/frontend/Parser.h
@@ -1020,12 +1020,12 @@ class Parser final : private JS::AutoGCRooter, public StrictModeGetter
// Parse a module.
Node moduleBody(ModuleSharedContext* modulesc);
- // Parse a function, given only its body. Used for the Function and
- // Generator constructors.
- Node standaloneFunctionBody(HandleFunction fun, HandleScope enclosingScope,
- Handle<PropertyNameVector> formals,
- GeneratorKind generatorKind, FunctionAsyncKind asyncKind,
- Directives inheritedDirectives, Directives* newDirectives);
+ // Parse a function, used for the Function, GeneratorFunction, and
+ // AsyncFunction constructors.
+ Node standaloneFunction(HandleFunction fun, HandleScope enclosingScope,
+ mozilla::Maybe<uint32_t> parameterListEnd,
+ GeneratorKind generatorKind, FunctionAsyncKind asyncKind,
+ Directives inheritedDirectives, Directives* newDirectives);
// Parse a function, given only its arguments and body. Used for lazily
// parsed functions.
@@ -1041,7 +1041,9 @@ class Parser final : private JS::AutoGCRooter, public StrictModeGetter
// Parse a function's formal parameters and its body assuming its function
// ParseContext is already on the stack.
bool functionFormalParametersAndBody(InHandling inHandling, YieldHandling yieldHandling,
- Node pn, FunctionSyntaxKind kind);
+ Node pn, FunctionSyntaxKind kind,
+ mozilla::Maybe<uint32_t> parameterListEnd = mozilla::Nothing());
+
// Determine whether |yield| is a valid name in the current context, or
// whether it's prohibited due to strictness, JS version, or occurrence
diff --git a/js/src/jit-test/tests/basic/destructuring-default.js b/js/src/jit-test/tests/basic/destructuring-default.js
index 168977e80..49a908b8a 100644
--- a/js/src/jit-test/tests/basic/destructuring-default.js
+++ b/js/src/jit-test/tests/basic/destructuring-default.js
@@ -84,10 +84,7 @@ function testArgumentFunction(pattern, input) {
'return [a, b, c, d, e, f];'
)(input);
}
-// XXX: ES6 requires the `Function` constructor to accept arbitrary
-// `BindingElement`s as formal parameters. See Bug 1037939.
-// Once fixed, please update the assertions below.
-assertThrowsInstanceOf(() => testAll(testArgumentFunction), SyntaxError);
+testAll(testArgumentFunction);
function testThrow(pattern, input) {
return new Function('input',
diff --git a/js/src/jit-test/tests/basic/destructuring-rest.js b/js/src/jit-test/tests/basic/destructuring-rest.js
index f53f07e03..fcb7b79bb 100644
--- a/js/src/jit-test/tests/basic/destructuring-rest.js
+++ b/js/src/jit-test/tests/basic/destructuring-rest.js
@@ -132,10 +132,9 @@ function testArgumentFunction(pattern, input, binding) {
'return ' + binding
)(input);
}
-// XXX: ES6 requires the `Function` constructor to accept arbitrary
-// `BindingElement`s as formal parameters. See Bug 1037939.
-// Once fixed, please update the assertions below.
-assertThrowsInstanceOf(() => testDeclaration(testArgumentFunction), SyntaxError);
+// ES6 requires the `Function` constructor to accept arbitrary
+// `BindingElement`s as formal parameters.
+testDeclaration(testArgumentFunction);
function testThrow(pattern, input, binding) {
binding = binding || 'rest';
diff --git a/js/src/jit-test/tests/debug/Script-gc-02.js b/js/src/jit-test/tests/debug/Script-gc-02.js
index 33d33dfc1..04dd4b220 100644
--- a/js/src/jit-test/tests/debug/Script-gc-02.js
+++ b/js/src/jit-test/tests/debug/Script-gc-02.js
@@ -10,5 +10,5 @@ assertEq(arr.length, 10);
gc();
for (var i = 0; i < arr.length; i++)
- assertEq(arr[i].lineCount, 1);
+ assertEq(arr[i].lineCount, 3);
diff --git a/js/src/jit-test/tests/debug/Script-gc-03.js b/js/src/jit-test/tests/debug/Script-gc-03.js
index b2cb70232..30c3e8dbc 100644
--- a/js/src/jit-test/tests/debug/Script-gc-03.js
+++ b/js/src/jit-test/tests/debug/Script-gc-03.js
@@ -10,6 +10,6 @@ assertEq(arr.length, 100);
gc(g);
for (var i = 0; i < arr.length; i++)
- assertEq(arr[i].lineCount, 1);
+ assertEq(arr[i].lineCount, 3);
gc();
diff --git a/js/src/jit-test/tests/debug/Script-sourceStart-04.js b/js/src/jit-test/tests/debug/Script-sourceStart-04.js
index c12e669bf..2aa382b7b 100644
--- a/js/src/jit-test/tests/debug/Script-sourceStart-04.js
+++ b/js/src/jit-test/tests/debug/Script-sourceStart-04.js
@@ -20,6 +20,6 @@ function test(string, range) {
}
test("eval('2 * 3')", [0, 5]);
-test("new Function('2 * 3')", [0, 5]);
-test("new Function('x', 'x * x')", [0, 5]);
+test("new Function('2 * 3')", [0, 12]);
+test("new Function('x', 'x * x')", [0, 13]);
assertEq(count, 6);
diff --git a/js/src/js.msg b/js/src/js.msg
index 2a818056f..8766bfbf5 100644
--- a/js/src/js.msg
+++ b/js/src/js.msg
@@ -329,6 +329,7 @@ MSG_DEF(JSMSG_TOO_MANY_LOCALS, 0, JSEXN_SYNTAXERR, "too many local varia
MSG_DEF(JSMSG_TOO_MANY_YIELDS, 0, JSEXN_SYNTAXERR, "too many yield expressions")
MSG_DEF(JSMSG_TOUGH_BREAK, 0, JSEXN_SYNTAXERR, "unlabeled break must be inside loop or switch")
MSG_DEF(JSMSG_UNEXPECTED_TOKEN, 2, JSEXN_SYNTAXERR, "expected {0}, got {1}")
+MSG_DEF(JSMSG_UNEXPECTED_PARAMLIST_END,0, JSEXN_SYNTAXERR, "unexpected end of function parameter list")
MSG_DEF(JSMSG_UNNAMED_CLASS_STMT, 0, JSEXN_SYNTAXERR, "class statement requires a name")
MSG_DEF(JSMSG_UNNAMED_FUNCTION_STMT, 0, JSEXN_SYNTAXERR, "function statement requires a name")
MSG_DEF(JSMSG_UNTERMINATED_COMMENT, 0, JSEXN_SYNTAXERR, "unterminated comment")
diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index ee9c61059..e6fc1f98b 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -11,6 +11,7 @@
#include "jsapi.h"
#include "mozilla/FloatingPoint.h"
+#include "mozilla/Maybe.h"
#include "mozilla/PodOperations.h"
#include "mozilla/Sprintf.h"
@@ -107,6 +108,7 @@ using namespace js::gc;
using mozilla::Maybe;
using mozilla::PodCopy;
using mozilla::PodZero;
+using mozilla::Some;
using JS::AutoGCRooter;
using JS::ToInt32;
@@ -4232,15 +4234,15 @@ JS_GetFunctionScript(JSContext* cx, HandleFunction fun)
}
/*
- * enclosingScope is a static enclosing scope, if any (e.g. a WithScope). If
- * the enclosing scope is the global scope, this must be null.
+ * enclosingScope is a scope, if any (e.g. a WithScope). If the scope is the
+ * global scope, this must be null.
*
- * enclosingDynamicScope is a dynamic scope to use, if it's not the global.
+ * enclosingEnv is an environment to use, if it's not the global.
*/
static bool
CompileFunction(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
- const char* name, unsigned nargs, const char* const* argnames,
- SourceBufferHolder& srcBuf,
+ const char* name,
+ SourceBufferHolder& srcBuf, uint32_t parameterListEnd,
HandleObject enclosingEnv, HandleScope enclosingScope,
MutableHandleFunction fun)
{
@@ -4256,13 +4258,6 @@ CompileFunction(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
return false;
}
- Rooted<PropertyNameVector> formals(cx, PropertyNameVector(cx));
- for (unsigned i = 0; i < nargs; i++) {
- RootedAtom argAtom(cx, Atomize(cx, argnames[i], strlen(argnames[i])));
- if (!argAtom || !formals.append(argAtom->asPropertyName()))
- return false;
- }
-
fun.set(NewScriptedFunction(cx, 0, JSFunction::INTERPRETED_NORMAL, funAtom,
/* proto = */ nullptr,
gc::AllocKind::FUNCTION, TenuredObject,
@@ -4275,7 +4270,45 @@ CompileFunction(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
MOZ_ASSERT_IF(!IsGlobalLexicalEnvironment(enclosingEnv),
enclosingScope->hasOnChain(ScopeKind::NonSyntactic));
- if (!frontend::CompileFunctionBody(cx, fun, optionsArg, formals, srcBuf, enclosingScope))
+ if (!frontend::CompileStandaloneFunction(cx, fun, optionsArg, srcBuf,
+ Some(parameterListEnd), enclosingScope))
+ {
+ return false;
+ }
+
+ return true;
+}
+
+static MOZ_MUST_USE bool
+BuildFunctionString(unsigned nargs, const char* const* argnames,
+ const SourceBufferHolder& srcBuf, StringBuffer* out,
+ uint32_t* parameterListEnd)
+{
+ MOZ_ASSERT(out);
+ MOZ_ASSERT(parameterListEnd);
+
+ if (!out->ensureTwoByteChars())
+ return false;
+ if (!out->append("("))
+ return false;
+ for (unsigned i = 0; i < nargs; i++) {
+ if (i != 0) {
+ if (!out->append(", "))
+ return false;
+ }
+ if (!out->append(argnames[i], strlen(argnames[i])))
+ return false;
+ }
+
+ // Remember the position of ")".
+ *parameterListEnd = out->length();
+ MOZ_ASSERT(FunctionConstructorMedialSigils[0] == ')');
+
+ if (!out->append(FunctionConstructorMedialSigils))
+ return false;
+ if (!out->append(srcBuf.get(), srcBuf.length()))
+ return false;
+ if (!out->append(FunctionConstructorFinalBrace))
return false;
return true;
@@ -4291,7 +4324,16 @@ JS::CompileFunction(JSContext* cx, AutoObjectVector& envChain,
RootedScope scope(cx);
if (!CreateNonSyntacticEnvironmentChain(cx, envChain, &env, &scope))
return false;
- return CompileFunction(cx, options, name, nargs, argnames, srcBuf, env, scope, fun);
+
+ uint32_t parameterListEnd;
+ StringBuffer funStr(cx);
+ if (!BuildFunctionString(nargs, argnames, srcBuf, &funStr, &parameterListEnd))
+ return false;
+
+ size_t newLen = funStr.length();
+ SourceBufferHolder newSrcBuf(funStr.stealChars(), newLen, SourceBufferHolder::GiveOwnership);
+
+ return CompileFunction(cx, options, name, newSrcBuf, parameterListEnd, env, scope, fun);
}
JS_PUBLIC_API(bool)
diff --git a/js/src/jsfun.cpp b/js/src/jsfun.cpp
index 9be02b217..1e1b76d5d 100644
--- a/js/src/jsfun.cpp
+++ b/js/src/jsfun.cpp
@@ -12,6 +12,7 @@
#include "mozilla/ArrayUtils.h"
#include "mozilla/CheckedInt.h"
+#include "mozilla/Maybe.h"
#include "mozilla/PodOperations.h"
#include "mozilla/Range.h"
@@ -60,8 +61,10 @@ using namespace js::gc;
using namespace js::frontend;
using mozilla::ArrayLength;
+using mozilla::Maybe;
using mozilla::PodCopy;
using mozilla::RangedPtr;
+using mozilla::Some;
static bool
fun_enumerate(JSContext* cx, HandleObject obj)
@@ -985,19 +988,19 @@ js::FindBody(JSContext* cx, HandleFunction fun, HandleLinearString src, size_t*
}
JSString*
-js::FunctionToString(JSContext* cx, HandleFunction fun, bool lambdaParen)
+js::FunctionToString(JSContext* cx, HandleFunction fun, bool prettyPrint)
{
if (fun->isInterpretedLazy() && !fun->getOrCreateScript(cx))
return nullptr;
if (IsAsmJSModule(fun))
- return AsmJSModuleToString(cx, fun, !lambdaParen);
+ return AsmJSModuleToString(cx, fun, !prettyPrint);
if (IsAsmJSFunction(fun))
return AsmJSFunctionToString(cx, fun);
if (IsWrappedAsyncFunction(fun)) {
RootedFunction unwrapped(cx, GetUnwrappedAsyncFunction(fun));
- return FunctionToString(cx, unwrapped, lambdaParen);
+ return FunctionToString(cx, unwrapped, prettyPrint);
}
StringBuffer out(cx);
@@ -1023,11 +1026,10 @@ js::FunctionToString(JSContext* cx, HandleFunction fun, bool lambdaParen)
bool funIsMethodOrNonArrowLambda = (fun->isLambda() && !fun->isArrow()) || fun->isMethod() ||
fun->isGetter() || fun->isSetter();
+ bool haveSource = fun->isInterpreted() && !fun->isSelfHostedBuiltin();
// If we're not in pretty mode, put parentheses around lambda functions and methods.
- if (fun->isInterpreted() && !lambdaParen && funIsMethodOrNonArrowLambda &&
- !fun->isSelfHostedBuiltin())
- {
+ if (haveSource && !prettyPrint && funIsMethodOrNonArrowLambda) {
if (!out.append("("))
return nullptr;
}
@@ -1045,7 +1047,6 @@ js::FunctionToString(JSContext* cx, HandleFunction fun, bool lambdaParen)
return nullptr;
}
- bool haveSource = fun->isInterpreted() && !fun->isSelfHostedBuiltin();
if (haveSource && !script->scriptSource()->hasSourceData() &&
!JSScript::loadSource(cx, script->scriptSource(), &haveSource))
{
@@ -1056,54 +1057,10 @@ js::FunctionToString(JSContext* cx, HandleFunction fun, bool lambdaParen)
if (!src)
return nullptr;
- // The source data for functions created by calling the Function
- // constructor is only the function's body. This depends on the fact,
- // asserted below, that in Function("function f() {}"), the inner
- // function's sourceStart points to the '(', not the 'f'.
- bool funCon = !fun->isArrow() &&
- script->sourceStart() == 0 &&
- script->sourceEnd() == script->scriptSource()->length() &&
- script->scriptSource()->argumentsNotIncluded();
-
- // Functions created with the constructor can't be arrow functions or
- // expression closures.
- MOZ_ASSERT_IF(funCon, !fun->isArrow());
- MOZ_ASSERT_IF(funCon, !fun->isExprBody());
- MOZ_ASSERT_IF(!funCon && !fun->isArrow(),
- src->length() > 0 && src->latin1OrTwoByteChar(0) == '(');
-
- bool buildBody = funCon;
- if (buildBody) {
- // This function was created with the Function constructor. We don't
- // have source for the arguments, so we have to generate that. Part
- // of bug 755821 should be cobbling the arguments passed into the
- // Function constructor into the source string.
- if (!out.append("("))
- return nullptr;
-
- // Fish out the argument names.
- MOZ_ASSERT(script->numArgs() == fun->nargs());
-
- BindingIter bi(script);
- for (unsigned i = 0; i < fun->nargs(); i++, bi++) {
- MOZ_ASSERT(bi.argumentSlot() == i);
- if (i && !out.append(", "))
- return nullptr;
- if (i == unsigned(fun->nargs() - 1) && fun->hasRest() && !out.append("..."))
- return nullptr;
- if (!out.append(bi.name()))
- return nullptr;
- }
- if (!out.append(") {\n"))
- return nullptr;
- }
if (!out.append(src))
return nullptr;
- if (buildBody) {
- if (!out.append("\n}"))
- return nullptr;
- }
- if (!lambdaParen && funIsMethodOrNonArrowLambda) {
+
+ if (!prettyPrint && funIsMethodOrNonArrowLambda) {
if (!out.append(")"))
return nullptr;
}
@@ -1114,8 +1071,6 @@ js::FunctionToString(JSContext* cx, HandleFunction fun, bool lambdaParen)
{
return nullptr;
}
- if (!lambdaParen && fun->isLambda() && !fun->isArrow() && !out.append(")"))
- return nullptr;
} else {
MOZ_ASSERT(!fun->isExprBody());
@@ -1657,17 +1612,6 @@ fun_isGenerator(JSContext* cx, unsigned argc, Value* vp)
return true;
}
-/*
- * Report "malformed formal parameter" iff no illegal char or similar scanner
- * error was already reported.
- */
-static bool
-OnBadFormal(JSContext* cx)
-{
- JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_BAD_FORMAL);
- return false;
-}
-
const JSFunctionSpec js::function_methods[] = {
#if JS_HAS_TOSOURCE
JS_FN(js_toSource_str, fun_toSource, 0,0),
@@ -1681,11 +1625,12 @@ const JSFunctionSpec js::function_methods[] = {
JS_FS_END
};
+// ES 2017 draft rev 0f10dba4ad18de92d47d421f378233a2eae8f077 19.2.1.1.1.
static bool
FunctionConstructor(JSContext* cx, const CallArgs& args, GeneratorKind generatorKind,
FunctionAsyncKind asyncKind)
{
- /* Block this call if security callbacks forbid it. */
+ // Block this call if security callbacks forbid it.
Rooted<GlobalObject*> global(cx, &args.callee().global());
if (!GlobalObject::isRuntimeCodeGenEnabled(cx, global)) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CSP_BLOCKED_FUNCTION);
@@ -1717,82 +1662,65 @@ FunctionConstructor(JSContext* cx, const CallArgs& args, GeneratorKind generator
introducerFilename = maybeScript->scriptSource()->introducerFilename();
CompileOptions options(cx);
+ // Use line 0 to make the function body starts from line 1.
options.setMutedErrors(mutedErrors)
- .setFileAndLine(filename, 1)
+ .setFileAndLine(filename, 0)
.setNoScriptRval(false)
.setIntroductionInfo(introducerFilename, introductionType, lineno, maybeScript, pcOffset);
- Vector<char16_t> paramStr(cx);
- RootedString bodyText(cx);
+ StringBuffer sb(cx);
- if (args.length() == 0) {
- bodyText = cx->names().empty;
- } else {
- // Collect the function-argument arguments into one string, separated
- // by commas, then make a tokenstream from that string, and scan it to
- // get the arguments. We need to throw the full scanner at the
- // problem because the argument string may contain comments, newlines,
- // destructuring arguments, and similar manner of insanities. ("I have
- // a feeling we're not in simple-comma-separated-parameters land any
- // more, Toto....")
- //
- // XXX It'd be better if the parser provided utility methods to parse
- // an argument list, and to parse a function body given a parameter
- // list. But our parser provides no such pleasant interface now.
- unsigned n = args.length() - 1;
+ if (!sb.append('('))
+ return false;
- // Convert the parameters-related arguments to strings, and determine
- // the length of the string containing the overall parameter list.
- mozilla::CheckedInt<uint32_t> paramStrLen = 0;
+ if (args.length() > 1) {
RootedString str(cx);
+
+ // Steps 5-6, 9.
+ unsigned n = args.length() - 1;
+
for (unsigned i = 0; i < n; i++) {
+ // Steps 9.a-b, 9.d.i-ii.
str = ToString<CanGC>(cx, args[i]);
if (!str)
return false;
- args[i].setString(str);
- paramStrLen += str->length();
- }
-
- // Tack in space for any combining commas.
- if (n > 0)
- paramStrLen += n - 1;
+ // Steps 9.b, 9.d.iii.
+ if (!sb.append(str))
+ return false;
- // Check for integer and string-size overflow.
- if (!paramStrLen.isValid() || paramStrLen.value() > JSString::MAX_LENGTH) {
- ReportAllocationOverflow(cx);
- return false;
+ if (i < args.length() - 2) {
+ // Step 9.d.iii.
+ if (!sb.append(", "))
+ return false;
+ }
}
+ }
- uint32_t paramsLen = paramStrLen.value();
+ // Remember the position of ")".
+ Maybe<uint32_t> parameterListEnd = Some(uint32_t(sb.length()));
+ MOZ_ASSERT(FunctionConstructorMedialSigils[0] == ')');
- // Fill a vector with the comma-joined arguments. Careful! This
- // string is *not* null-terminated!
- MOZ_ASSERT(paramStr.length() == 0);
- if (!paramStr.growBy(paramsLen)) {
- ReportOutOfMemory(cx);
- return false;
- }
-
- char16_t* cp = paramStr.begin();
- for (unsigned i = 0; i < n; i++) {
- JSLinearString* argLinear = args[i].toString()->ensureLinear(cx);
- if (!argLinear)
- return false;
+ if (!sb.append(FunctionConstructorMedialSigils))
+ return false;
- CopyChars(cp, *argLinear);
- cp += argLinear->length();
+ if (args.length() > 0) {
+ // Steps 7-8, 10.
+ RootedString body(cx, ToString<CanGC>(cx, args[args.length() - 1]));
+ if (!body || !sb.append(body))
+ return false;
+ }
- if (i + 1 < n)
- *cp++ = ',';
- }
+ if (!sb.append(FunctionConstructorFinalBrace))
+ return false;
- MOZ_ASSERT(cp == paramStr.end());
+ // The parser only accepts two byte strings.
+ if (!sb.ensureTwoByteChars())
+ return false;
- bodyText = ToString(cx, args[n]);
- if (!bodyText)
- return false;
- }
+ RootedString functionText(cx, sb.finishString());
+ if (!functionText)
+ return false;
/*
* NB: (new Function) is not lexically closed by its caller, it's just an
@@ -1802,24 +1730,22 @@ FunctionConstructor(JSContext* cx, const CallArgs& args, GeneratorKind generator
*/
RootedAtom anonymousAtom(cx, cx->names().anonymous);
- // ES2017, draft rev 0f10dba4ad18de92d47d421f378233a2eae8f077
- // 19.2.1.1.1 Runtime Semantics: CreateDynamicFunction, step 24.
+ // Step 24.
RootedObject proto(cx);
if (!isAsync) {
if (!GetPrototypeFromCallableConstructor(cx, args, &proto))
return false;
}
- // 19.2.1.1.1, step 4.d, use %Generator% as the fallback prototype.
+ // Step 4.d, use %Generator% as the fallback prototype.
// Also use %Generator% for the unwrapped function of async functions.
if (!proto && isStarGenerator) {
- // Unwrapped function of async function should use GeneratorFunction,
- // while wrapped function isn't generator.
proto = GlobalObject::getOrCreateStarGeneratorFunctionPrototype(cx, global);
if (!proto)
return false;
}
+ // Step 25-32 (reordered).
RootedObject globalLexical(cx, &global->lexicalEnvironment());
AllocKind allocKind = isAsync ? AllocKind::FUNCTION_EXTENDED : AllocKind::FUNCTION;
RootedFunction fun(cx, NewFunctionWithProto(cx, nullptr, 0,
@@ -1832,81 +1758,11 @@ FunctionConstructor(JSContext* cx, const CallArgs& args, GeneratorKind generator
if (!JSFunction::setTypeForScriptedFunction(cx, fun))
return false;
+ // Steps 2.a-b, 3.a-b, 4.a-b, 11-23.
AutoStableStringChars stableChars(cx);
- if (!stableChars.initTwoByte(cx, bodyText))
+ if (!stableChars.initTwoByte(cx, functionText))
return false;
- bool hasRest = false;
-
- Rooted<PropertyNameVector> formals(cx, PropertyNameVector(cx));
- if (args.length() > 1) {
- // Initialize a tokenstream to parse the new function's arguments. No
- // StrictModeGetter is needed because this TokenStream won't report any
- // strict mode errors. Strict mode errors that might be reported here
- // (duplicate argument names, etc.) will be detected when we compile
- // the function body.
- //
- // XXX Bug! We have to parse the body first to determine strictness.
- // We have to know strictness to parse arguments correctly, in case
- // arguments contains a strict mode violation. And we should be
- // using full-fledged arguments parsing here, in order to handle
- // destructuring and other exotic syntaxes.
- AutoKeepAtoms keepAtoms(cx->perThreadData);
- TokenStream ts(cx, options, paramStr.begin(), paramStr.length(),
- /* strictModeGetter = */ nullptr);
- bool yieldIsValidName = ts.versionNumber() < JSVERSION_1_7 && !isStarGenerator;
-
- // The argument string may be empty or contain no tokens.
- TokenKind tt;
- if (!ts.getToken(&tt))
- return false;
- if (tt != TOK_EOF) {
- while (true) {
- // Check that it's a name.
- if (hasRest) {
- ts.reportError(JSMSG_PARAMETER_AFTER_REST);
- return false;
- }
-
- if (tt == TOK_YIELD && yieldIsValidName)
- tt = TOK_NAME;
-
- if (tt != TOK_NAME) {
- if (tt == TOK_TRIPLEDOT) {
- hasRest = true;
- if (!ts.getToken(&tt))
- return false;
- if (tt == TOK_YIELD && yieldIsValidName)
- tt = TOK_NAME;
- if (tt != TOK_NAME) {
- ts.reportError(JSMSG_NO_REST_NAME);
- return false;
- }
- } else {
- return OnBadFormal(cx);
- }
- }
-
- if (!formals.append(ts.currentName()))
- return false;
-
- // Get the next token. Stop on end of stream. Otherwise
- // insist on a comma, get another name, and iterate.
- if (!ts.getToken(&tt))
- return false;
- if (tt == TOK_EOF)
- break;
- if (tt != TOK_COMMA)
- return OnBadFormal(cx);
- if (!ts.getToken(&tt))
- return false;
- }
- }
- }
-
- if (hasRest)
- fun->setHasRest();
-
mozilla::Range<const char16_t> chars = stableChars.twoByteRange();
SourceBufferHolder::Ownership ownership = stableChars.maybeGiveOwnershipToCaller()
? SourceBufferHolder::GiveOwnership
@@ -1914,11 +1770,13 @@ FunctionConstructor(JSContext* cx, const CallArgs& args, GeneratorKind generator
bool ok;
SourceBufferHolder srcBuf(chars.begin().get(), chars.length(), ownership);
if (isAsync)
- ok = frontend::CompileAsyncFunctionBody(cx, &fun, options, formals, srcBuf);
+ ok = frontend::CompileStandaloneAsyncFunction(cx, &fun, options, srcBuf, parameterListEnd);
else if (isStarGenerator)
- ok = frontend::CompileStarGeneratorBody(cx, &fun, options, formals, srcBuf);
+ ok = frontend::CompileStandaloneGenerator(cx, &fun, options, srcBuf, parameterListEnd);
else
- ok = frontend::CompileFunctionBody(cx, &fun, options, formals, srcBuf);
+ ok = frontend::CompileStandaloneFunction(cx, &fun, options, srcBuf, parameterListEnd);
+
+ // Step 33.
args.rval().setObject(*fun);
return ok;
}
diff --git a/js/src/jsfun.h b/js/src/jsfun.h
index ef4a603d0..88af5c22d 100644
--- a/js/src/jsfun.h
+++ b/js/src/jsfun.h
@@ -28,6 +28,9 @@ static const uint32_t JSSLOT_BOUND_FUNCTION_TARGET = 2;
static const uint32_t JSSLOT_BOUND_FUNCTION_THIS = 3;
static const uint32_t JSSLOT_BOUND_FUNCTION_ARGS = 4;
+static const char FunctionConstructorMedialSigils[] = ") {\n";
+static const char FunctionConstructorFinalBrace[] = "\n}";
+
class JSFunction : public js::NativeObject
{
public:
@@ -816,7 +819,7 @@ JSFunction::getExtendedSlot(size_t which) const
namespace js {
-JSString* FunctionToString(JSContext* cx, HandleFunction fun, bool lambdaParen);
+JSString* FunctionToString(JSContext* cx, HandleFunction fun, bool prettyPring);
template<XDRMode mode>
bool
diff --git a/js/src/jsscript.cpp b/js/src/jsscript.cpp
index 10821f26a..b568b4b30 100644
--- a/js/src/jsscript.cpp
+++ b/js/src/jsscript.cpp
@@ -1689,6 +1689,16 @@ ScriptSource::substringDontDeflate(JSContext* cx, size_t start, size_t stop)
return NewStringCopyNDontDeflate<CanGC>(cx, chars, len);
}
+JSFlatString*
+ScriptSource::functionBodyString(JSContext* cx)
+{
+ MOZ_ASSERT(isFunctionBody());
+
+ size_t start = parameterListEnd_ + (sizeof(FunctionConstructorMedialSigils) - 1);
+ size_t stop = length() - (sizeof(FunctionConstructorFinalBrace) - 1);
+ return substring(cx, start, stop);
+}
+
MOZ_MUST_USE bool
ScriptSource::setSource(ExclusiveContext* cx,
mozilla::UniquePtr<char16_t[], JS::FreePolicy>&& source,
@@ -1740,10 +1750,9 @@ ScriptSource::setCompressedSource(SharedImmutableString&& raw, size_t uncompress
bool
ScriptSource::setSourceCopy(ExclusiveContext* cx, SourceBufferHolder& srcBuf,
- bool argumentsNotIncluded, SourceCompressionTask* task)
+ SourceCompressionTask* task)
{
MOZ_ASSERT(!hasSourceData());
- argumentsNotIncluded_ = argumentsNotIncluded;
auto& cache = cx->zone()->runtimeFromAnyThread()->sharedImmutableStrings();
auto deduped = cache.getOrCreate(srcBuf.get(), srcBuf.length(), [&]() {
@@ -1940,16 +1949,6 @@ ScriptSource::performXDR(XDRState<mode>* xdr)
if (!xdr->codeUint32(&compressedLength))
return false;
- {
- uint8_t argumentsNotIncluded;
- if (mode == XDR_ENCODE)
- argumentsNotIncluded = argumentsNotIncluded_;
- if (!xdr->codeUint8(&argumentsNotIncluded))
- return false;
- if (mode == XDR_DECODE)
- argumentsNotIncluded_ = argumentsNotIncluded;
- }
-
size_t byteLen = compressedLength ? compressedLength : (len * sizeof(char16_t));
if (mode == XDR_DECODE) {
uint8_t* p = xdr->cx()->template pod_malloc<uint8_t>(Max<size_t>(byteLen, 1));
@@ -2074,7 +2073,8 @@ FormatIntroducedFilename(ExclusiveContext* cx, const char* filename, unsigned li
}
bool
-ScriptSource::initFromOptions(ExclusiveContext* cx, const ReadOnlyCompileOptions& options)
+ScriptSource::initFromOptions(ExclusiveContext* cx, const ReadOnlyCompileOptions& options,
+ Maybe<uint32_t> parameterListEnd)
{
MOZ_ASSERT(!filename_);
MOZ_ASSERT(!introducerFilename_);
@@ -2083,6 +2083,7 @@ ScriptSource::initFromOptions(ExclusiveContext* cx, const ReadOnlyCompileOptions
introductionType_ = options.introductionType;
setIntroductionOffset(options.introductionOffset);
+ parameterListEnd_ = parameterListEnd.isSome() ? parameterListEnd.value() : 0;
if (options.hasIntroductionInfo) {
MOZ_ASSERT(options.introductionType != nullptr);
diff --git a/js/src/jsscript.h b/js/src/jsscript.h
index bc8bda83d..ffd4b1e2e 100644
--- a/js/src/jsscript.h
+++ b/js/src/jsscript.h
@@ -10,6 +10,7 @@
#define jsscript_h
#include "mozilla/Atomics.h"
+#include "mozilla/Maybe.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/PodOperations.h"
#include "mozilla/Variant.h"
@@ -399,6 +400,11 @@ class ScriptSource
// scripts.
uint32_t introductionOffset_;
+ // If this source is for Function constructor, the position of ")" after
+ // parameter list in the source. This is used to get function body.
+ // 0 for other cases.
+ uint32_t parameterListEnd_;
+
// If this ScriptSource was generated by a code-introduction mechanism such
// as |eval| or |new Function|, the debugger needs access to the "raw"
// filename of the top-level script that contains the eval-ing code. To
@@ -428,7 +434,6 @@ class ScriptSource
// demand. If sourceRetrievable_ and hasSourceData() are false, it is not
// possible to get source at all.
bool sourceRetrievable_:1;
- bool argumentsNotIncluded_:1;
bool hasIntroductionOffset_:1;
const char16_t* chunkChars(JSContext* cx, UncompressedSourceCache::AutoHoldEntry& holder,
@@ -443,10 +448,10 @@ class ScriptSource
sourceMapURL_(nullptr),
mutedErrors_(false),
introductionOffset_(0),
+ parameterListEnd_(0),
introducerFilename_(nullptr),
introductionType_(nullptr),
sourceRetrievable_(false),
- argumentsNotIncluded_(false),
hasIntroductionOffset_(false)
{
}
@@ -461,10 +466,10 @@ class ScriptSource
if (--refs == 0)
js_delete(this);
}
- bool initFromOptions(ExclusiveContext* cx, const ReadOnlyCompileOptions& options);
+ bool initFromOptions(ExclusiveContext* cx, const ReadOnlyCompileOptions& options,
+ mozilla::Maybe<uint32_t> parameterListEnd = mozilla::Nothing());
bool setSourceCopy(ExclusiveContext* cx,
JS::SourceBufferHolder& srcBuf,
- bool argumentsNotIncluded,
SourceCompressionTask* tok);
void setSourceRetrievable() { sourceRetrievable_ = true; }
bool sourceRetrievable() const { return sourceRetrievable_; }
@@ -492,11 +497,6 @@ class ScriptSource
return data.match(LengthMatcher());
}
- bool argumentsNotIncluded() const {
- MOZ_ASSERT(hasSourceData());
- return argumentsNotIncluded_;
- }
-
// Return a string containing the chars starting at |begin| and ending at
// |begin + len|.
const char16_t* chars(JSContext* cx, UncompressedSourceCache::AutoHoldEntry& asp,
@@ -504,6 +504,12 @@ class ScriptSource
JSFlatString* substring(JSContext* cx, size_t start, size_t stop);
JSFlatString* substringDontDeflate(JSContext* cx, size_t start, size_t stop);
+
+ bool isFunctionBody() {
+ return parameterListEnd_ != 0;
+ }
+ JSFlatString* functionBodyString(JSContext* cx);
+
void addSizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf,
JS::ScriptSourceInfo* info) const;
@@ -567,6 +573,10 @@ class ScriptSource
introductionOffset_ = offset;
hasIntroductionOffset_ = true;
}
+
+ uint32_t parameterListEnd() const {
+ return parameterListEnd_;
+ }
};
class ScriptSourceHolder
diff --git a/js/src/tests/ecma_6/Function/invalid-parameter-list.js b/js/src/tests/ecma_6/Function/invalid-parameter-list.js
new file mode 100644
index 000000000..8aae89ef1
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/invalid-parameter-list.js
@@ -0,0 +1,27 @@
+// This constructor behaves like `Function` without checking
+// if the parameter list end is at the expected position.
+// We use this to make sure that the tests we use are otherwise
+// syntactically correct.
+function DumpFunction(...args) {
+ let code = "function anonymous(";
+ code += args.slice(0, -1).join(", ");
+ code += ") {\n";
+ code += args[args.length -1];
+ code += "\n}";
+ eval(code);
+}
+
+const tests = [
+ ["/*", "*/) {"],
+ ["//", ") {"],
+ ["a = `", "` ) {"],
+ [") { var x = function (", "} "],
+ ["x = function (", "}) {"]
+];
+
+for (const test of tests) {
+ DumpFunction(...test);
+ assertThrowsInstanceOf(() => new Function(...test), SyntaxError);
+}
+
+reportCompare(0, 0, 'ok');
diff --git a/js/src/vm/Debugger.cpp b/js/src/vm/Debugger.cpp
index b6bc7d62a..4d181545f 100644
--- a/js/src/vm/Debugger.cpp
+++ b/js/src/vm/Debugger.cpp
@@ -6890,8 +6890,13 @@ class DebuggerSourceGetTextMatcher
bool hasSourceData = ss->hasSourceData();
if (!ss->hasSourceData() && !JSScript::loadSource(cx_, ss, &hasSourceData))
return nullptr;
- return hasSourceData ? ss->substring(cx_, 0, ss->length())
- : NewStringCopyZ<CanGC>(cx_, "[no source]");
+ if (!hasSourceData)
+ return NewStringCopyZ<CanGC>(cx_, "[no source]");
+
+ if (ss->isFunctionBody())
+ return ss->functionBodyString(cx_);
+
+ return ss->substring(cx_, 0, ss->length());
}
ReturnType match(Handle<WasmInstanceObject*> wasmInstance) {
diff --git a/js/src/wasm/AsmJS.cpp b/js/src/wasm/AsmJS.cpp
index 34f5a8c0d..4dbc9b387 100644
--- a/js/src/wasm/AsmJS.cpp
+++ b/js/src/wasm/AsmJS.cpp
@@ -21,6 +21,7 @@
#include "mozilla/Attributes.h"
#include "mozilla/Compression.h"
#include "mozilla/MathAlgorithms.h"
+#include "mozilla/Maybe.h"
#include "jsmath.h"
#include "jsprf.h"
@@ -8033,21 +8034,6 @@ TryInstantiate(JSContext* cx, CallArgs args, Module& module, const AsmJSMetadata
return true;
}
-static MOZ_MUST_USE bool
-MaybeAppendUTF8Name(JSContext* cx, const char* utf8Chars, MutableHandle<PropertyNameVector> names)
-{
- if (!utf8Chars)
- return true;
-
- UTF8Chars utf8(utf8Chars, strlen(utf8Chars));
-
- JSAtom* atom = AtomizeUTF8Chars(cx, utf8Chars, strlen(utf8Chars));
- if (!atom)
- return false;
-
- return names.append(atom->asPropertyName());
-}
-
static bool
HandleInstantiationFailure(JSContext* cx, CallArgs args, const AsmJSMetadata& metadata)
{
@@ -8068,8 +8054,8 @@ HandleInstantiationFailure(JSContext* cx, CallArgs args, const AsmJSMetadata& me
return false;
}
- uint32_t begin = metadata.srcBodyStart; // starts right after 'use asm'
- uint32_t end = metadata.srcEndBeforeCurly();
+ uint32_t begin = metadata.srcStart;
+ uint32_t end = metadata.srcEndAfterCurly();
Rooted<JSFlatString*> src(cx, source->substringDontDeflate(cx, begin, end));
if (!src)
return false;
@@ -8080,18 +8066,11 @@ HandleInstantiationFailure(JSContext* cx, CallArgs args, const AsmJSMetadata& me
if (!fun)
return false;
- Rooted<PropertyNameVector> formals(cx, PropertyNameVector(cx));
- if (!MaybeAppendUTF8Name(cx, metadata.globalArgumentName.get(), &formals))
- return false;
- if (!MaybeAppendUTF8Name(cx, metadata.importArgumentName.get(), &formals))
- return false;
- if (!MaybeAppendUTF8Name(cx, metadata.bufferArgumentName.get(), &formals))
- return false;
-
CompileOptions options(cx);
options.setMutedErrors(source->mutedErrors())
.setFile(source->filename())
.setNoScriptRval(false);
+ options.asmJSOption = AsmJSOption::Disabled;
// The exported function inherits an implicit strict context if the module
// also inherited it somehow.
@@ -8106,8 +8085,8 @@ HandleInstantiationFailure(JSContext* cx, CallArgs args, const AsmJSMetadata& me
SourceBufferHolder::Ownership ownership = stableChars.maybeGiveOwnershipToCaller()
? SourceBufferHolder::GiveOwnership
: SourceBufferHolder::NoOwnership;
- SourceBufferHolder srcBuf(chars, end - begin, ownership);
- if (!frontend::CompileFunctionBody(cx, &fun, options, formals, srcBuf))
+ SourceBufferHolder srcBuf(chars, stableChars.twoByteRange().length(), ownership);
+ if (!frontend::CompileStandaloneFunction(cx, &fun, options, srcBuf, Nothing()))
return false;
// Call the function we just recompiled.
@@ -8849,23 +8828,6 @@ js::IsAsmJSModuleLoadedFromCache(JSContext* cx, unsigned argc, Value* vp)
/*****************************************************************************/
// asm.js toString/toSource support
-static MOZ_MUST_USE bool
-MaybeAppendUTF8Chars(JSContext* cx, const char* sep, const char* utf8Chars, StringBuffer* sb)
-{
- if (!utf8Chars)
- return true;
-
- UTF8Chars utf8(utf8Chars, strlen(utf8Chars));
-
- size_t length;
- UniqueTwoByteChars twoByteChars(UTF8CharsToNewTwoByteCharsZ(cx, utf8, &length).get());
- if (!twoByteChars)
- return false;
-
- return sb->append(sep, strlen(sep)) &&
- sb->append(twoByteChars.get(), length);
-}
-
JSString*
js::AsmJSModuleToString(JSContext* cx, HandleFunction fun, bool addParenToLambda)
{
@@ -8895,33 +8857,12 @@ js::AsmJSModuleToString(JSContext* cx, HandleFunction fun, bool addParenToLambda
if (!out.append("() {\n [sourceless code]\n}"))
return nullptr;
} else {
- // Whether the function has been created with a Function ctor
- bool funCtor = begin == 0 && end == source->length() && source->argumentsNotIncluded();
- if (funCtor) {
- // Functions created with the function constructor don't have arguments in their source.
- if (!out.append("("))
- return nullptr;
-
- if (!MaybeAppendUTF8Chars(cx, "", metadata.globalArgumentName.get(), &out))
- return nullptr;
- if (!MaybeAppendUTF8Chars(cx, ", ", metadata.importArgumentName.get(), &out))
- return nullptr;
- if (!MaybeAppendUTF8Chars(cx, ", ", metadata.bufferArgumentName.get(), &out))
- return nullptr;
-
- if (!out.append(") {\n"))
- return nullptr;
- }
-
Rooted<JSFlatString*> src(cx, source->substring(cx, begin, end));
if (!src)
return nullptr;
if (!out.append(src))
return nullptr;
-
- if (funCtor && !out.append("\n}"))
- return nullptr;
}
if (addParenToLambda && fun->isLambda() && !out.append(")"))
@@ -8959,10 +8900,6 @@ js::AsmJSFunctionToString(JSContext* cx, HandleFunction fun)
if (!out.append("() {\n [sourceless code]\n}"))
return nullptr;
} else {
- // asm.js functions cannot have been created with a Function constructor
- // as they belong within a module.
- MOZ_ASSERT(!(begin == 0 && end == source->length() && source->argumentsNotIncluded()));
-
Rooted<JSFlatString*> src(cx, source->substring(cx, begin, end));
if (!src)
return nullptr;
diff --git a/js/xpconnect/loader/mozJSSubScriptLoader.cpp b/js/xpconnect/loader/mozJSSubScriptLoader.cpp
index 824e9ab9e..9c8908ea4 100644
--- a/js/xpconnect/loader/mozJSSubScriptLoader.cpp
+++ b/js/xpconnect/loader/mozJSSubScriptLoader.cpp
@@ -130,7 +130,9 @@ PrepareScript(nsIURI* uri,
MutableHandleFunction function)
{
JS::CompileOptions options(cx);
- options.setFileAndLine(uriStr, 1)
+ // Use line 0 to make the function body starts from line 1 when
+ // |reuseGlobal == true|.
+ options.setFileAndLine(uriStr, reuseGlobal ? 0 : 1)
.setVersion(JSVERSION_LATEST);
if (!charset.IsVoid()) {
char16_t* scriptBuf = nullptr;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 02:22:46 +0000