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main_repo / deps / v8 / src / objects-visiting.cc @ f230a1cf
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// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h" |
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#include "ic-inl.h" |
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#include "objects-visiting.h" |
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namespace v8 {
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namespace internal {
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static inline bool IsShortcutCandidate(int type) { |
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return ((type & kShortcutTypeMask) == kShortcutTypeTag);
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} |
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StaticVisitorBase::VisitorId StaticVisitorBase::GetVisitorId( |
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int instance_type,
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int instance_size) {
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if (instance_type < FIRST_NONSTRING_TYPE) {
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switch (instance_type & kStringRepresentationMask) {
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case kSeqStringTag:
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if ((instance_type & kStringEncodingMask) == kOneByteStringTag) {
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return kVisitSeqOneByteString;
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} else {
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return kVisitSeqTwoByteString;
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} |
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case kConsStringTag:
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if (IsShortcutCandidate(instance_type)) {
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return kVisitShortcutCandidate;
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} else {
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return kVisitConsString;
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} |
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case kSlicedStringTag:
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return kVisitSlicedString;
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case kExternalStringTag:
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return GetVisitorIdForSize(kVisitDataObject,
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kVisitDataObjectGeneric, |
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instance_size); |
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} |
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UNREACHABLE(); |
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} |
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switch (instance_type) {
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case BYTE_ARRAY_TYPE:
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return kVisitByteArray;
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case FREE_SPACE_TYPE:
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return kVisitFreeSpace;
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case FIXED_ARRAY_TYPE:
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return kVisitFixedArray;
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case FIXED_DOUBLE_ARRAY_TYPE:
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return kVisitFixedDoubleArray;
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case CONSTANT_POOL_ARRAY_TYPE:
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return kVisitConstantPoolArray;
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case ODDBALL_TYPE:
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return kVisitOddball;
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case MAP_TYPE:
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return kVisitMap;
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case CODE_TYPE:
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return kVisitCode;
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case CELL_TYPE:
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return kVisitCell;
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case PROPERTY_CELL_TYPE:
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return kVisitPropertyCell;
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case JS_SET_TYPE:
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return GetVisitorIdForSize(kVisitStruct,
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kVisitStructGeneric, |
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JSSet::kSize); |
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case JS_MAP_TYPE:
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return GetVisitorIdForSize(kVisitStruct,
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kVisitStructGeneric, |
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JSMap::kSize); |
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case JS_WEAK_MAP_TYPE:
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return kVisitJSWeakMap;
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case JS_WEAK_SET_TYPE:
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return kVisitJSWeakSet;
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case JS_REGEXP_TYPE:
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return kVisitJSRegExp;
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case SHARED_FUNCTION_INFO_TYPE:
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return kVisitSharedFunctionInfo;
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case JS_PROXY_TYPE:
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return GetVisitorIdForSize(kVisitStruct,
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kVisitStructGeneric, |
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JSProxy::kSize); |
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case JS_FUNCTION_PROXY_TYPE:
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return GetVisitorIdForSize(kVisitStruct,
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kVisitStructGeneric, |
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JSFunctionProxy::kSize); |
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case FOREIGN_TYPE:
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return GetVisitorIdForSize(kVisitDataObject,
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kVisitDataObjectGeneric, |
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Foreign::kSize); |
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case SYMBOL_TYPE:
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return kVisitSymbol;
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case FILLER_TYPE:
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return kVisitDataObjectGeneric;
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case JS_ARRAY_BUFFER_TYPE:
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return kVisitJSArrayBuffer;
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case JS_TYPED_ARRAY_TYPE:
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return kVisitJSTypedArray;
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case JS_DATA_VIEW_TYPE:
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return kVisitJSDataView;
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case JS_OBJECT_TYPE:
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case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
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case JS_GENERATOR_OBJECT_TYPE:
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case JS_MODULE_TYPE:
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case JS_VALUE_TYPE:
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case JS_DATE_TYPE:
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case JS_ARRAY_TYPE:
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case JS_GLOBAL_PROXY_TYPE:
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case JS_GLOBAL_OBJECT_TYPE:
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case JS_BUILTINS_OBJECT_TYPE:
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case JS_MESSAGE_OBJECT_TYPE:
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return GetVisitorIdForSize(kVisitJSObject,
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kVisitJSObjectGeneric, |
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instance_size); |
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case JS_FUNCTION_TYPE:
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return kVisitJSFunction;
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case HEAP_NUMBER_TYPE:
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case EXTERNAL_PIXEL_ARRAY_TYPE:
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case EXTERNAL_BYTE_ARRAY_TYPE:
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case EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE:
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case EXTERNAL_SHORT_ARRAY_TYPE:
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case EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE:
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case EXTERNAL_INT_ARRAY_TYPE:
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case EXTERNAL_UNSIGNED_INT_ARRAY_TYPE:
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case EXTERNAL_FLOAT_ARRAY_TYPE:
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case EXTERNAL_DOUBLE_ARRAY_TYPE:
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return GetVisitorIdForSize(kVisitDataObject,
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kVisitDataObjectGeneric, |
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instance_size); |
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#define MAKE_STRUCT_CASE(NAME, Name, name) \
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case NAME##_TYPE: |
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STRUCT_LIST(MAKE_STRUCT_CASE) |
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#undef MAKE_STRUCT_CASE
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if (instance_type == ALLOCATION_SITE_TYPE) {
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return kVisitAllocationSite;
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} |
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return GetVisitorIdForSize(kVisitStruct,
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kVisitStructGeneric, |
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instance_size); |
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default:
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UNREACHABLE(); |
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return kVisitorIdCount;
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} |
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} |
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} } // namespace v8::internal
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