зеркало из https://github.com/mozilla/gecko-dev.git
Backed out 3 changesets (bug 1698791) for causing valgrind failures.
Backed out changeset 1bd16d8959e5 (bug 1698791) Backed out changeset 467a7afcdd3d (bug 1698791) Backed out changeset 48b921d8aeee (bug 1698791)
This commit is contained in:
Родитель
0583e7e496
Коммит
f29929310e
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@ -223,20 +223,57 @@ static MOZ_ALWAYS_INLINE bool GetLengthProperty(JSContext* cx, HandleObject obj,
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* "08" or "4.0" as array indices, which they are not.
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*
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*/
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template <typename CharT>
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static bool StringIsArrayIndexHelper(const CharT* s, uint32_t length,
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uint32_t* indexp) {
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const CharT* end = s + length;
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if (length == 0 || length > (sizeof("4294967294") - 1) || !IsAsciiDigit(*s)) {
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return false;
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}
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uint32_t c = 0, previous = 0;
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uint32_t index = AsciiDigitToNumber(*s++);
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/* Don't allow leading zeros. */
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if (index == 0 && s != end) {
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return false;
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}
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for (; s < end; s++) {
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if (!IsAsciiDigit(*s)) {
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return false;
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}
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previous = index;
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c = AsciiDigitToNumber(*s);
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index = 10 * index + c;
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}
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/* Make sure we didn't overflow. */
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if (previous < (MAX_ARRAY_INDEX / 10) ||
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(previous == (MAX_ARRAY_INDEX / 10) && c <= (MAX_ARRAY_INDEX % 10))) {
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MOZ_ASSERT(index <= MAX_ARRAY_INDEX);
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*indexp = index;
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return true;
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}
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return false;
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}
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JS_FRIEND_API bool js::StringIsArrayIndex(JSLinearString* str,
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uint32_t* indexp) {
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return str->isIndex(indexp) && *indexp <= MAX_ARRAY_INDEX;
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AutoCheckCannotGC nogc;
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return str->hasLatin1Chars()
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? StringIsArrayIndexHelper(str->latin1Chars(nogc), str->length(),
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indexp)
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: StringIsArrayIndexHelper(str->twoByteChars(nogc), str->length(),
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indexp);
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}
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JS_FRIEND_API bool js::StringIsArrayIndex(const char16_t* str, uint32_t length,
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uint32_t* indexp) {
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if (length == 0 || length > UINT32_CHAR_BUFFER_LENGTH) {
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return false;
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}
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if (!mozilla::IsAsciiDigit(str[0])) {
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return false;
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}
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return CheckStringIsIndex(str, length, indexp) && *indexp <= MAX_ARRAY_INDEX;
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return StringIsArrayIndexHelper(str, length, indexp);
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}
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template <typename T>
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@ -37,7 +37,12 @@ MOZ_ALWAYS_INLINE bool IdIsIndex(jsid id, uint32_t* indexp) {
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}
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JSAtom* atom = JSID_TO_ATOM(id);
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return atom->isIndex(indexp) && *indexp <= MAX_ARRAY_INDEX;
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if (atom->length() == 0 ||
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!mozilla::IsAsciiDigit(atom->latin1OrTwoByteChar(0))) {
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return false;
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}
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return js::StringIsArrayIndex(atom, indexp);
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}
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// The methods below only create dense boxed arrays.
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@ -336,7 +336,8 @@ static bool ValueToNameOrSymbolId(JSContext* cx, HandleValue idVal,
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return true;
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}
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if (id.isAtom() && id.toAtom()->isIndex()) {
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uint32_t dummy;
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if (id.isAtom() && id.toAtom()->isIndex(&dummy)) {
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id.set(JSID_VOID);
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return true;
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}
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@ -12111,7 +12111,8 @@ void CodeGenerator::addGetPropertyCache(LInstruction* ins,
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CacheKind kind = CacheKind::GetElem;
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if (id.constant() && id.value().isString()) {
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JSString* idString = id.value().toString();
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if (idString->isAtom() && !idString->asAtom().isIndex()) {
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uint32_t dummy;
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if (idString->isAtom() && !idString->asAtom().isIndex(&dummy)) {
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kind = CacheKind::GetProp;
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}
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}
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@ -12128,7 +12129,8 @@ void CodeGenerator::addSetPropertyCache(LInstruction* ins,
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CacheKind kind = CacheKind::SetElem;
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if (id.constant() && id.value().isString()) {
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JSString* idString = id.value().toString();
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if (idString->isAtom() && !idString->asAtom().isIndex()) {
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uint32_t dummy;
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if (idString->isAtom() && !idString->asAtom().isIndex(&dummy)) {
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kind = CacheKind::SetProp;
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}
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}
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@ -12176,7 +12178,8 @@ void CodeGenerator::visitGetPropSuperCache(LGetPropSuperCache* ins) {
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CacheKind kind = CacheKind::GetElemSuper;
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if (id.constant() && id.value().isString()) {
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JSString* idString = id.value().toString();
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if (idString->isAtom() && !idString->asAtom().isIndex()) {
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uint32_t dummy;
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if (idString->isAtom() && !idString->asAtom().isIndex(&dummy)) {
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kind = CacheKind::GetPropSuper;
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}
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}
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@ -1165,7 +1165,7 @@ int32_t GetIndexFromString(JSString* str) {
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return -1;
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}
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uint32_t index;
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uint32_t index = UINT32_MAX;
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if (!str->asLinear().isIndex(&index) || index > INT32_MAX) {
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return -1;
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}
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@ -5431,7 +5431,9 @@ JS_PUBLIC_API bool JS_CharsToId(JSContext* cx, JS::TwoByteChars chars,
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return false;
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}
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#ifdef DEBUG
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MOZ_ASSERT(!atom->isIndex(), "API misuse: |chars| must not encode an index");
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uint32_t dummy;
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MOZ_ASSERT(!atom->isIndex(&dummy),
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"API misuse: |chars| must not encode an index");
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#endif
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idp.set(AtomToId(atom));
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return true;
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@ -818,7 +818,7 @@ JSLinearString* js::Int32ToString(JSContext* cx, int32_t si) {
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return nullptr;
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}
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if (si >= 0) {
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str->maybeInitializeIndexValue(si);
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str->maybeInitializeIndex(si);
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}
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CacheNumber(cx, si, str);
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@ -1660,7 +1660,7 @@ static JSString* NumberToStringWithBase(JSContext* cx, double d, int base) {
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}
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if (isBase10Int && i >= 0) {
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s->maybeInitializeIndexValue(i);
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s->maybeInitializeIndex(i);
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}
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realm->dtoaCache.cache(base, d, s);
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@ -518,7 +518,11 @@ bool ArgumentsObject::obj_mayResolve(const JSAtomState& names, jsid id,
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// Arguments might resolve indexes, Symbol.iterator, or length/callee.
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if (JSID_IS_ATOM(id)) {
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JSAtom* atom = JSID_TO_ATOM(id);
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return atom->isIndex() || atom == names.length || atom == names.callee;
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uint32_t index;
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if (atom->isIndex(&index)) {
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return true;
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}
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return atom == names.length || atom == names.callee;
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}
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return id.isInt() || id.isWellKnownSymbol(JS::SymbolCode::iterator);
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@ -20,7 +20,7 @@
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namespace js {
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MOZ_ALWAYS_INLINE jsid AtomToId(JSAtom* atom) {
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inline jsid AtomToId(JSAtom* atom) {
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static_assert(JSID_INT_MIN == 0);
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uint32_t index;
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@ -954,14 +954,7 @@ static MOZ_ALWAYS_INLINE JSAtom* AllocateNewAtom(
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MOZ_ASSERT(atom->hash() == lookup.hash);
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if (indexValue) {
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atom->setIsIndex(*indexValue);
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} else {
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// We need to call isIndexSlow directly to avoid the flag check in isIndex,
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// because we still have to initialize that flag.
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uint32_t index;
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if (atom->isIndexSlow(&index)) {
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atom->setIsIndex(index);
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}
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atom->maybeInitializeIndex(*indexValue, true);
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}
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return atom;
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@ -1230,40 +1230,17 @@ template bool js::CheckStringIsIndex(const char16_t* s, size_t length,
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uint32_t* indexp);
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template <typename CharT>
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static uint32_t AtomCharsToIndex(const CharT* s, size_t length) {
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// Chars are known to be a valid index value (as determined by
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// CheckStringIsIndex) that didn't fit in the "index value" bits in the
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// header.
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MOZ_ASSERT(length > 0);
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MOZ_ASSERT(length <= UINT32_CHAR_BUFFER_LENGTH);
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RangedPtr<const CharT> cp(s, length);
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const RangedPtr<const CharT> end(s + length, s, length);
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MOZ_ASSERT(IsAsciiDigit(*cp));
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uint32_t index = AsciiDigitToNumber(*cp++);
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MOZ_ASSERT(index != 0);
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while (cp < end) {
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MOZ_ASSERT(IsAsciiDigit(*cp));
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index = 10 * index + AsciiDigitToNumber(*cp);
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cp++;
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}
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return index;
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/* static */
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bool JSLinearString::isIndexSlow(const CharT* s, size_t length,
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uint32_t* indexp) {
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return js::CheckStringIsIndex(s, length, indexp);
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}
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uint32_t JSAtom::getIndexSlow() const {
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MOZ_ASSERT(isIndex());
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MOZ_ASSERT(!hasIndexValue());
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template bool JSLinearString::isIndexSlow(const Latin1Char* s, size_t length,
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uint32_t* indexp);
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size_t len = length();
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AutoCheckCannotGC nogc;
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return hasLatin1Chars() ? AtomCharsToIndex(latin1Chars(nogc), len)
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: AtomCharsToIndex(twoByteChars(nogc), len);
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}
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template bool JSLinearString::isIndexSlow(const char16_t* s, size_t length,
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uint32_t* indexp);
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constexpr StaticStrings::SmallCharTable StaticStrings::createSmallCharTable() {
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SmallCharTable array{};
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@ -1328,7 +1305,7 @@ bool StaticStrings::init(JSContext* cx) {
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// Static string initialization can not race, so allow even without the
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// lock.
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intStaticTable[i]->setIsIndex(i);
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intStaticTable[i]->maybeInitializeIndex(i, true);
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}
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return true;
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@ -61,12 +61,6 @@ class PropertyName;
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/* The buffer length required to contain any unsigned 32-bit integer. */
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static const size_t UINT32_CHAR_BUFFER_LENGTH = sizeof("4294967295") - 1;
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// Returns true if the characters of `s` store an unsigned 32-bit integer value,
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// initializing `*indexp` to that value if so.
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// Leading '0' isn't allowed except 0 itself.
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template <typename CharT>
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bool CheckStringIsIndex(const CharT* s, size_t length, uint32_t* indexp);
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} /* namespace js */
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// clang-format off
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@ -311,20 +305,16 @@ class JSString : public js::gc::CellWithLengthAndFlags {
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static const uint32_t LATIN1_CHARS_BIT = js::Bit(9);
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// Whether this atom's characters store an uint32 index value. Not used for
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// non-atomized strings. See JSLinearString::isIndex.
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static const uint32_t ATOM_IS_INDEX = js::Bit(10);
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static const uint32_t INDEX_VALUE_BIT = js::Bit(11);
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static const uint32_t INDEX_VALUE_BIT = js::Bit(10);
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static const uint32_t INDEX_VALUE_SHIFT = 16;
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// NON_DEDUP_BIT is used in string deduplication during tenuring.
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static const uint32_t NON_DEDUP_BIT = js::Bit(12);
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static const uint32_t NON_DEDUP_BIT = js::Bit(11);
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// If IN_STRING_TO_ATOM_CACHE is set, this string had an entry in the
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// StringToAtomCache at some point. Note that GC can purge the cache without
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// clearing this bit.
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static const uint32_t IN_STRING_TO_ATOM_CACHE = js::Bit(13);
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static const uint32_t IN_STRING_TO_ATOM_CACHE = js::Bit(12);
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static const uint32_t MAX_LENGTH = JS::MaxStringLength;
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|
@ -785,6 +775,9 @@ class JSLinearString : public JSString {
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bool isLinear() const = delete;
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JSLinearString& asLinear() const = delete;
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template <typename CharT>
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static bool isIndexSlow(const CharT* s, size_t length, uint32_t* indexp);
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protected:
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/* Returns void pointer to latin1/twoByte chars, for finalizers. */
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MOZ_ALWAYS_INLINE
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@ -871,11 +864,10 @@ class JSLinearString : public JSString {
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JS::AutoCheckCannotGC nogc;
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if (hasLatin1Chars()) {
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const JS::Latin1Char* s = latin1Chars(nogc);
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return mozilla::IsAsciiDigit(*s) &&
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js::CheckStringIsIndex(s, len, indexp);
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return mozilla::IsAsciiDigit(*s) && isIndexSlow(s, len, indexp);
|
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}
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const char16_t* s = twoByteChars(nogc);
|
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return mozilla::IsAsciiDigit(*s) && js::CheckStringIsIndex(s, len, indexp);
|
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return mozilla::IsAsciiDigit(*s) && isIndexSlow(s, len, indexp);
|
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}
|
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|
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/*
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|
@ -885,9 +877,18 @@ class JSLinearString : public JSString {
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* (Thus if calling isIndex returns true, js::IndexToString(cx, *indexp) will
|
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* be a string equal to this string.)
|
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*/
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inline bool isIndex(uint32_t* indexp) const;
|
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bool isIndex(uint32_t* indexp) const {
|
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MOZ_ASSERT(JSString::isLinear());
|
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|
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void maybeInitializeIndexValue(uint32_t index, bool allowAtom = false) {
|
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if (JSString::hasIndexValue()) {
|
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*indexp = getIndexValue();
|
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return true;
|
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}
|
||||
|
||||
return isIndexSlow(indexp);
|
||||
}
|
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|
||||
void maybeInitializeIndex(uint32_t index, bool allowAtom = false) {
|
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MOZ_ASSERT(JSString::isLinear());
|
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MOZ_ASSERT_IF(hasIndexValue(), getIndexValue() == index);
|
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MOZ_ASSERT_IF(!allowAtom, !isAtom());
|
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|
@ -1163,29 +1164,6 @@ class JSAtom : public JSLinearString {
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setFlagBit(PERMANENT_ATOM_MASK);
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}
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|
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MOZ_ALWAYS_INLINE bool isIndex() const {
|
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MOZ_ASSERT(JSString::isAtom());
|
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mozilla::DebugOnly<uint32_t> index;
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MOZ_ASSERT(!!(flags() & ATOM_IS_INDEX) == isIndexSlow(&index));
|
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return flags() & ATOM_IS_INDEX;
|
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}
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MOZ_ALWAYS_INLINE bool isIndex(uint32_t* index) const {
|
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MOZ_ASSERT(JSString::isAtom());
|
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if (!isIndex()) {
|
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return false;
|
||||
}
|
||||
*index = hasIndexValue() ? getIndexValue() : getIndexSlow();
|
||||
return true;
|
||||
}
|
||||
|
||||
uint32_t getIndexSlow() const;
|
||||
|
||||
void setIsIndex(uint32_t index) {
|
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MOZ_ASSERT(JSString::isAtom());
|
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setFlagBit(ATOM_IS_INDEX);
|
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maybeInitializeIndexValue(index, /* allowAtom = */ true);
|
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}
|
||||
|
||||
inline js::HashNumber hash() const;
|
||||
inline void initHash(js::HashNumber hash);
|
||||
|
||||
|
@ -1266,6 +1244,12 @@ MOZ_ALWAYS_INLINE JSAtom* JSLinearString::morphAtomizedStringIntoPermanentAtom(
|
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|
||||
namespace js {
|
||||
|
||||
// Returns true if the characters of `s` store an unsigned 32-bit integer value,
|
||||
// initializing `*indexp` to that value if so.
|
||||
// Leading '0' isn't allowed except 0 itself.
|
||||
template <typename CharT>
|
||||
bool CheckStringIsIndex(const CharT* s, size_t length, uint32_t* indexp);
|
||||
|
||||
/**
|
||||
* An indexable characters class exposing unaligned, little-endian encoded
|
||||
* char16_t data.
|
||||
|
@ -1989,25 +1973,13 @@ MOZ_ALWAYS_INLINE const char16_t* JSLinearString::rawTwoByteChars() const {
|
|||
}
|
||||
|
||||
inline js::PropertyName* JSAtom::asPropertyName() {
|
||||
MOZ_ASSERT(!isIndex());
|
||||
#ifdef DEBUG
|
||||
uint32_t dummy;
|
||||
MOZ_ASSERT(!isIndex(&dummy));
|
||||
#endif
|
||||
return static_cast<js::PropertyName*>(this);
|
||||
}
|
||||
|
||||
inline bool JSLinearString::isIndex(uint32_t* indexp) const {
|
||||
MOZ_ASSERT(JSString::isLinear());
|
||||
|
||||
if (isAtom()) {
|
||||
return asAtom().isIndex(indexp);
|
||||
}
|
||||
|
||||
if (JSString::hasIndexValue()) {
|
||||
*indexp = getIndexValue();
|
||||
return true;
|
||||
}
|
||||
|
||||
return isIndexSlow(indexp);
|
||||
}
|
||||
|
||||
inline size_t JSLinearString::allocSize() const {
|
||||
MOZ_ASSERT(ownsMallocedChars());
|
||||
|
||||
|
|
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