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-rw-r--r--js/src/frontend/BytecodeEmitter.cpp5
-rw-r--r--js/src/frontend/ParseNode.cpp2
-rw-r--r--js/src/frontend/Parser.cpp82
3 files changed, 49 insertions, 40 deletions
diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index c7c615ccf..4eb7bf880 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -319,7 +319,7 @@ ScopeKindIsInBody(ScopeKind kind)
static inline void
MarkAllBindingsClosedOver(LexicalScope::Data& data)
{
- BindingName* names = data.names;
+ TrailingNamesArray& names = data.trailingNames;
for (uint32_t i = 0; i < data.length; i++)
names[i] = BindingName(names[i].name(), true);
}
@@ -8978,7 +8978,8 @@ BytecodeEmitter::isRestParameter(ParseNode* pn, bool* result)
if (bindings->nonPositionalFormalStart > 0) {
// |paramName| can be nullptr when the rest destructuring syntax is
// used: `function f(...[]) {}`.
- JSAtom* paramName = bindings->names[bindings->nonPositionalFormalStart - 1].name();
+ JSAtom* paramName =
+ bindings->trailingNames[bindings->nonPositionalFormalStart - 1].name();
*result = paramName && name == paramName;
return true;
}
diff --git a/js/src/frontend/ParseNode.cpp b/js/src/frontend/ParseNode.cpp
index ece3a45df..91f17625c 100644
--- a/js/src/frontend/ParseNode.cpp
+++ b/js/src/frontend/ParseNode.cpp
@@ -838,7 +838,7 @@ LexicalScopeNode::dump(int indent)
if (!isEmptyScope()) {
LexicalScope::Data* bindings = scopeBindings();
for (uint32_t i = 0; i < bindings->length; i++) {
- JSAtom* name = bindings->names[i].name();
+ JSAtom* name = bindings->trailingNames[i].name();
JS::AutoCheckCannotGC nogc;
if (name->hasLatin1Chars())
DumpName(name->latin1Chars(nogc), name->length());
diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp
index 623379f61..7bfab87a3 100644
--- a/js/src/frontend/Parser.cpp
+++ b/js/src/frontend/Parser.cpp
@@ -19,6 +19,8 @@
#include "frontend/Parser.h"
+#include <new>
+
#include "jsapi.h"
#include "jsatom.h"
#include "jscntxt.h"
@@ -1451,16 +1453,26 @@ template <typename Scope>
static typename Scope::Data*
NewEmptyBindingData(ExclusiveContext* cx, LifoAlloc& alloc, uint32_t numBindings)
{
+ using Data = typename Scope::Data;
size_t allocSize = Scope::sizeOfData(numBindings);
- typename Scope::Data* bindings = static_cast<typename Scope::Data*>(alloc.alloc(allocSize));
- if (!bindings) {
+ auto* bindings = alloc.allocInSize<Data>(allocSize, numBindings);
+ if (!bindings)
ReportOutOfMemory(cx);
- return nullptr;
- }
- PodZero(bindings);
return bindings;
}
+/**
+ * Copy-construct |BindingName|s from |bindings| into |cursor|, then return
+ * the location one past the newly-constructed |BindingName|s.
+ */
+static MOZ_MUST_USE BindingName*
+FreshlyInitializeBindings(BindingName* cursor, const Vector<BindingName>& bindings)
+{
+ for (const BindingName& binding : bindings)
+ new (cursor++) BindingName(binding);
+ return cursor;
+}
+
template <>
Maybe<GlobalScope::Data*>
Parser<FullParseHandler>::newGlobalScopeData(ParseContext::Scope& scope)
@@ -1505,22 +1517,20 @@ Parser<FullParseHandler>::newGlobalScopeData(ParseContext::Scope& scope)
return Nothing();
// The ordering here is important. See comments in GlobalScope.
- BindingName* start = bindings->names;
+ BindingName* start = bindings->trailingNames.start();
BindingName* cursor = start;
- PodCopy(cursor, funs.begin(), funs.length());
- cursor += funs.length();
+ cursor = FreshlyInitializeBindings(cursor, funs);
bindings->varStart = cursor - start;
- PodCopy(cursor, vars.begin(), vars.length());
- cursor += vars.length();
+ cursor = FreshlyInitializeBindings(cursor, vars);
bindings->letStart = cursor - start;
- PodCopy(cursor, lets.begin(), lets.length());
- cursor += lets.length();
+ cursor = FreshlyInitializeBindings(cursor, lets);
bindings->constStart = cursor - start;
- PodCopy(cursor, consts.begin(), consts.length());
+ cursor = FreshlyInitializeBindings(cursor, consts);
+
bindings->length = numBindings;
}
@@ -1572,22 +1582,20 @@ Parser<FullParseHandler>::newModuleScopeData(ParseContext::Scope& scope)
return Nothing();
// The ordering here is important. See comments in ModuleScope.
- BindingName* start = bindings->names;
+ BindingName* start = bindings->trailingNames.start();
BindingName* cursor = start;
- PodCopy(cursor, imports.begin(), imports.length());
- cursor += imports.length();
+ cursor = FreshlyInitializeBindings(cursor, imports);
bindings->varStart = cursor - start;
- PodCopy(cursor, vars.begin(), vars.length());
- cursor += vars.length();
+ cursor = FreshlyInitializeBindings(cursor, vars);
bindings->letStart = cursor - start;
- PodCopy(cursor, lets.begin(), lets.length());
- cursor += lets.length();
+ cursor = FreshlyInitializeBindings(cursor, lets);
bindings->constStart = cursor - start;
- PodCopy(cursor, consts.begin(), consts.length());
+ cursor = FreshlyInitializeBindings(cursor, consts);
+
bindings->length = numBindings;
}
@@ -1623,16 +1631,16 @@ Parser<FullParseHandler>::newEvalScopeData(ParseContext::Scope& scope)
if (!bindings)
return Nothing();
- BindingName* start = bindings->names;
+ BindingName* start = bindings->trailingNames.start();
BindingName* cursor = start;
// Keep track of what vars are functions. This is only used in BCE to omit
// superfluous DEFVARs.
- PodCopy(cursor, funs.begin(), funs.length());
- cursor += funs.length();
+ cursor = FreshlyInitializeBindings(cursor, funs);
bindings->varStart = cursor - start;
- PodCopy(cursor, vars.begin(), vars.length());
+ cursor = FreshlyInitializeBindings(cursor, vars);
+
bindings->length = numBindings;
}
@@ -1719,18 +1727,17 @@ Parser<FullParseHandler>::newFunctionScopeData(ParseContext::Scope& scope, bool
return Nothing();
// The ordering here is important. See comments in FunctionScope.
- BindingName* start = bindings->names;
+ BindingName* start = bindings->trailingNames.start();
BindingName* cursor = start;
- PodCopy(cursor, positionalFormals.begin(), positionalFormals.length());
- cursor += positionalFormals.length();
+ cursor = FreshlyInitializeBindings(cursor, positionalFormals);
bindings->nonPositionalFormalStart = cursor - start;
- PodCopy(cursor, formals.begin(), formals.length());
- cursor += formals.length();
+ cursor = FreshlyInitializeBindings(cursor, formals);
bindings->varStart = cursor - start;
- PodCopy(cursor, vars.begin(), vars.length());
+ cursor = FreshlyInitializeBindings(cursor, vars);
+
bindings->length = numBindings;
}
@@ -1760,10 +1767,11 @@ Parser<FullParseHandler>::newVarScopeData(ParseContext::Scope& scope)
return Nothing();
// The ordering here is important. See comments in FunctionScope.
- BindingName* start = bindings->names;
+ BindingName* start = bindings->trailingNames.start();
BindingName* cursor = start;
- PodCopy(cursor, vars.begin(), vars.length());
+ cursor = FreshlyInitializeBindings(cursor, vars);
+
bindings->length = numBindings;
}
@@ -1808,14 +1816,14 @@ Parser<FullParseHandler>::newLexicalScopeData(ParseContext::Scope& scope)
return Nothing();
// The ordering here is important. See comments in LexicalScope.
- BindingName* cursor = bindings->names;
+ BindingName* cursor = bindings->trailingNames.start();
BindingName* start = cursor;
- PodCopy(cursor, lets.begin(), lets.length());
- cursor += lets.length();
+ cursor = FreshlyInitializeBindings(cursor, lets);
bindings->constStart = cursor - start;
- PodCopy(cursor, consts.begin(), consts.length());
+ cursor = FreshlyInitializeBindings(cursor, consts);
+
bindings->length = numBindings;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 20:41:10 +0000