mirror of
https://github.com/dart-lang/sdk
synced 2024-10-14 23:49:45 +00:00
f98a2138b7
When uploading CLs, the presubmit checks verify that the lines in the diff are formatted correctly according to `git cl format runtime`. However, when `buildtools/<os>-<arch>/clang/bin/clang-format` is updated, it does not force reformatting of files that would be reformatted. This leads to two issues: * Inconsistent style within the code base and within a single file. * Spurious reformatting in CLs when (1) clang-format is used on the whole file, or (2) the diff lines overlap. `clang-format` doesn't change that frequently, so in general this is not a large issue, but I've seen a bit too many "spurious formatting, please revert" comments on CLs recently. This CL formats the runtime to be in line with the current pinned `clang-format`: ``` $ find runtime/ -iname *.h -o -iname *.cc | xargs buildtools/mac-arm64/clang/bin/clang-format -i ``` `git cl format` (which only formats changed lines, and does so with `clang-format`) seems to not agree with itself, or clang-format, or cpplint in a handful of places. This CL adds `// clang-format off` for these. (See previous patchsets for the specific instances.) TEST=A variety of bots including GCC, MacOS and Windows. Change-Id: I470892e898971899fda14bb3b8f2c8efefd67686 Cq-Include-Trybots: luci.dart.try:vm-gcc-linux-try,vm-ffi-qemu-linux-release-riscv64-try,vm-ffi-qemu-linux-release-arm-try,vm-aot-win-debug-x64-try,vm-win-debug-x64c-try,vm-mac-debug-x64-try,vm-mac-debug-arm64-try,vm-aot-linux-debug-x64-try Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/362780 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Daco Harkes <dacoharkes@google.com>
504 lines
17 KiB
C++
504 lines
17 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/symbols.h"
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#include "platform/unicode.h"
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#include "vm/canonical_tables.h"
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#include "vm/handles.h"
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#include "vm/hash_table.h"
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#include "vm/heap/safepoint.h"
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#include "vm/isolate.h"
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#include "vm/object.h"
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#include "vm/object_store.h"
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#include "vm/raw_object.h"
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#include "vm/reusable_handles.h"
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#include "vm/visitor.h"
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namespace dart {
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StringPtr Symbols::predefined_[Symbols::kNumberOfOneCharCodeSymbols];
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String* Symbols::symbol_handles_[Symbols::kMaxPredefinedId];
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static const char* const names[] = {
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// clang-format off
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nullptr,
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#define DEFINE_SYMBOL_LITERAL(symbol, literal) literal,
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PREDEFINED_SYMBOLS_LIST(DEFINE_SYMBOL_LITERAL)
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#undef DEFINE_SYMBOL_LITERAL
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"", // matches kTokenTableStart.
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#define DEFINE_TOKEN_SYMBOL_INDEX(t, s, p, a) s,
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DART_TOKEN_LIST(DEFINE_TOKEN_SYMBOL_INDEX)
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DART_KEYWORD_LIST(DEFINE_TOKEN_SYMBOL_INDEX)
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#undef DEFINE_TOKEN_SYMBOL_INDEX
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// clang-format on
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};
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StringPtr StringFrom(const uint8_t* data, intptr_t len, Heap::Space space) {
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return String::FromLatin1(data, len, space);
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}
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StringPtr StringFrom(const uint16_t* data, intptr_t len, Heap::Space space) {
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return String::FromUTF16(data, len, space);
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}
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StringPtr StringSlice::ToSymbol() const {
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if (is_all() && str_.IsOld()) {
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str_.SetCanonical();
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return str_.ptr();
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} else {
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String& result =
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String::Handle(String::SubString(str_, begin_index_, len_, Heap::kOld));
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result.SetCanonical();
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result.SetHash(hash_);
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return result.ptr();
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}
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}
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StringPtr ConcatString::ToSymbol() const {
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String& result = String::Handle(String::Concat(str1_, str2_, Heap::kOld));
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result.SetCanonical();
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result.SetHash(hash_);
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return result.ptr();
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}
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const char* Symbols::Name(SymbolId symbol) {
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ASSERT((symbol > kIllegal) && (symbol < kNullCharId));
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return names[symbol];
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}
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const String& Symbols::Token(Token::Kind token) {
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const int tok_index = token;
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ASSERT((0 <= tok_index) && (tok_index < Token::kNumTokens));
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// First keyword symbol is in symbol_handles_[kTokenTableStart + 1].
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const intptr_t token_id = Symbols::kTokenTableStart + 1 + tok_index;
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ASSERT(symbol_handles_[token_id] != nullptr);
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return *symbol_handles_[token_id];
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}
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void Symbols::Init(IsolateGroup* vm_isolate_group) {
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// Should only be run by the vm isolate.
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ASSERT(IsolateGroup::Current() == Dart::vm_isolate_group());
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ASSERT(vm_isolate_group == Dart::vm_isolate_group());
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Zone* zone = Thread::Current()->zone();
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// Create and setup a symbol table in the vm isolate.
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SetupSymbolTable(vm_isolate_group);
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// Create all predefined symbols.
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ASSERT((sizeof(names) / sizeof(const char*)) == Symbols::kNullCharId);
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CanonicalStringSet table(zone,
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vm_isolate_group->object_store()->symbol_table());
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// First set up all the predefined string symbols.
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// Create symbols for language keywords. Some keywords are equal to
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// symbols we already created, so use New() instead of Add() to ensure
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// that the symbols are canonicalized.
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for (intptr_t i = 1; i < Symbols::kNullCharId; i++) {
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String* str = String::ReadOnlyHandle();
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*str = OneByteString::New(names[i], Heap::kOld);
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str->Hash();
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*str ^= table.InsertOrGet(*str);
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str->SetCanonical(); // Make canonical once entered.
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symbol_handles_[i] = str;
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}
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// Add Latin1 characters as Symbols, so that Symbols::FromCharCode is fast.
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for (intptr_t c = 0; c < kNumberOfOneCharCodeSymbols; c++) {
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intptr_t idx = (kNullCharId + c);
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ASSERT(idx < kMaxPredefinedId);
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ASSERT(Utf::IsLatin1(c));
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uint8_t ch = static_cast<uint8_t>(c);
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String* str = String::ReadOnlyHandle();
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*str = OneByteString::New(&ch, 1, Heap::kOld);
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str->Hash();
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*str ^= table.InsertOrGet(*str);
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ASSERT(predefined_[c] == nullptr);
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str->SetCanonical(); // Make canonical once entered.
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predefined_[c] = str->ptr();
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symbol_handles_[idx] = str;
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}
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vm_isolate_group->object_store()->set_symbol_table(table.Release());
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}
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void Symbols::InitFromSnapshot(IsolateGroup* vm_isolate_group) {
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// Should only be run by the vm isolate.
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ASSERT(IsolateGroup::Current() == Dart::vm_isolate_group());
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ASSERT(vm_isolate_group == Dart::vm_isolate_group());
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Zone* zone = Thread::Current()->zone();
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CanonicalStringSet table(zone,
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vm_isolate_group->object_store()->symbol_table());
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// Lookup all the predefined string symbols and language keyword symbols
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// and cache them in the read only handles for fast access.
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for (intptr_t i = 1; i < Symbols::kNullCharId; i++) {
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String* str = String::ReadOnlyHandle();
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const unsigned char* name =
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reinterpret_cast<const unsigned char*>(names[i]);
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*str ^= table.GetOrNull(Latin1Array(name, strlen(names[i])));
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ASSERT(!str->IsNull());
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ASSERT(str->HasHash());
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ASSERT(str->IsCanonical());
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symbol_handles_[i] = str;
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}
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// Lookup Latin1 character Symbols and cache them in read only handles,
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// so that Symbols::FromCharCode is fast.
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for (intptr_t c = 0; c < kNumberOfOneCharCodeSymbols; c++) {
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intptr_t idx = (kNullCharId + c);
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ASSERT(idx < kMaxPredefinedId);
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ASSERT(Utf::IsLatin1(c));
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uint8_t ch = static_cast<uint8_t>(c);
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String* str = String::ReadOnlyHandle();
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*str ^= table.GetOrNull(Latin1Array(&ch, 1));
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ASSERT(!str->IsNull());
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ASSERT(str->HasHash());
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ASSERT(str->IsCanonical());
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predefined_[c] = str->ptr();
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symbol_handles_[idx] = str;
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}
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vm_isolate_group->object_store()->set_symbol_table(table.Release());
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}
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void Symbols::SetupSymbolTable(IsolateGroup* isolate_group) {
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ASSERT(isolate_group != nullptr);
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// Setup the symbol table used within the String class.
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const intptr_t initial_size = (isolate_group == Dart::vm_isolate_group())
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? kInitialVMIsolateSymtabSize
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: kInitialSymtabSize;
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class WeakArray& array = WeakArray::Handle(
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HashTables::New<CanonicalStringSet>(initial_size, Heap::kOld));
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isolate_group->object_store()->set_symbol_table(array);
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}
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void Symbols::GetStats(IsolateGroup* isolate_group,
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intptr_t* size,
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intptr_t* capacity) {
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ASSERT(isolate_group != nullptr);
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CanonicalStringSet table(isolate_group->object_store()->symbol_table());
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*size = table.NumOccupied();
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*capacity = table.NumEntries();
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table.Release();
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}
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StringPtr Symbols::New(Thread* thread, const char* cstr, intptr_t len) {
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ASSERT((cstr != nullptr) && (len >= 0));
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const uint8_t* utf8_array = reinterpret_cast<const uint8_t*>(cstr);
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return Symbols::FromUTF8(thread, utf8_array, len);
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}
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StringPtr Symbols::FromUTF8(Thread* thread,
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const uint8_t* utf8_array,
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intptr_t array_len) {
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if (array_len == 0 || utf8_array == nullptr) {
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return FromLatin1(thread, static_cast<uint8_t*>(nullptr), 0);
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}
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Utf8::Type type;
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intptr_t len = Utf8::CodeUnitCount(utf8_array, array_len, &type);
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ASSERT(len != 0);
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Zone* zone = thread->zone();
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if (type == Utf8::kLatin1) {
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uint8_t* characters = zone->Alloc<uint8_t>(len);
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if (!Utf8::DecodeToLatin1(utf8_array, array_len, characters, len)) {
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Utf8::ReportInvalidByte(utf8_array, array_len, len);
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return String::null();
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}
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return FromLatin1(thread, characters, len);
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}
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ASSERT((type == Utf8::kBMP) || (type == Utf8::kSupplementary));
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uint16_t* characters = zone->Alloc<uint16_t>(len);
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if (!Utf8::DecodeToUTF16(utf8_array, array_len, characters, len)) {
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Utf8::ReportInvalidByte(utf8_array, array_len, len);
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return String::null();
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}
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return FromUTF16(thread, characters, len);
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}
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StringPtr Symbols::FromLatin1(Thread* thread,
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const uint8_t* latin1_array,
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intptr_t len) {
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return NewSymbol(thread, Latin1Array(latin1_array, len));
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}
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StringPtr Symbols::FromUTF16(Thread* thread,
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const uint16_t* utf16_array,
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intptr_t len) {
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return NewSymbol(thread, UTF16Array(utf16_array, len));
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}
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StringPtr Symbols::FromConcat(Thread* thread,
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const String& str1,
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const String& str2) {
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if (str1.Length() == 0) {
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return New(thread, str2);
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} else if (str2.Length() == 0) {
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return New(thread, str1);
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} else {
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return NewSymbol(thread, ConcatString(str1, str2));
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}
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}
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StringPtr Symbols::FromGet(Thread* thread, const String& str) {
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return FromConcat(thread, GetterPrefix(), str);
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}
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StringPtr Symbols::FromSet(Thread* thread, const String& str) {
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return FromConcat(thread, SetterPrefix(), str);
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}
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StringPtr Symbols::FromDot(Thread* thread, const String& str) {
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return FromConcat(thread, str, Dot());
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}
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// TODO(srdjan): If this becomes performance critical code, consider looking
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// up symbol from hash of pieces instead of concatenating them first into
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// a string.
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StringPtr Symbols::FromConcatAll(
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Thread* thread,
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const GrowableHandlePtrArray<const String>& strs) {
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const intptr_t strs_length = strs.length();
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GrowableArray<intptr_t> lengths(strs_length);
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intptr_t len_sum = 0;
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const intptr_t kOneByteChar = 1;
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intptr_t char_size = kOneByteChar;
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for (intptr_t i = 0; i < strs_length; i++) {
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const String& str = strs[i];
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const intptr_t str_len = str.Length();
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if ((String::kMaxElements - len_sum) < str_len) {
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Exceptions::ThrowOOM();
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UNREACHABLE();
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}
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len_sum += str_len;
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lengths.Add(str_len);
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char_size = Utils::Maximum(char_size, str.CharSize());
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}
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const bool is_one_byte_string = char_size == kOneByteChar;
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Zone* zone = thread->zone();
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if (is_one_byte_string) {
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uint8_t* buffer = zone->Alloc<uint8_t>(len_sum);
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const uint8_t* const orig_buffer = buffer;
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for (intptr_t i = 0; i < strs_length; i++) {
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NoSafepointScope no_safepoint;
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intptr_t str_len = lengths[i];
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if (str_len > 0) {
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const String& str = strs[i];
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ASSERT(str.IsOneByteString());
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const uint8_t* src_p = OneByteString::DataStart(str);
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memmove(buffer, src_p, str_len);
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buffer += str_len;
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}
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}
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ASSERT(len_sum == buffer - orig_buffer);
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return Symbols::FromLatin1(thread, orig_buffer, len_sum);
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} else {
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uint16_t* buffer = zone->Alloc<uint16_t>(len_sum);
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const uint16_t* const orig_buffer = buffer;
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for (intptr_t i = 0; i < strs_length; i++) {
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NoSafepointScope no_safepoint;
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intptr_t str_len = lengths[i];
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if (str_len > 0) {
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const String& str = strs[i];
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if (str.IsTwoByteString()) {
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memmove(buffer, TwoByteString::DataStart(str), str_len * 2);
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} else {
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// One-byte to two-byte string copy.
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ASSERT(str.IsOneByteString());
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const uint8_t* src_p = OneByteString::DataStart(str);
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for (int n = 0; n < str_len; n++) {
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buffer[n] = src_p[n];
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}
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}
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buffer += str_len;
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}
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}
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ASSERT(len_sum == buffer - orig_buffer);
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return Symbols::FromUTF16(thread, orig_buffer, len_sum);
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}
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}
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// StringType can be StringSlice, ConcatString, or {Latin1,UTF16}Array.
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template <typename StringType>
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StringPtr Symbols::NewSymbol(Thread* thread, const StringType& str) {
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REUSABLE_OBJECT_HANDLESCOPE(thread);
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REUSABLE_SMI_HANDLESCOPE(thread);
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REUSABLE_WEAK_ARRAY_HANDLESCOPE(thread);
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String& symbol = String::Handle(thread->zone());
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dart::Object& key = thread->ObjectHandle();
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Smi& value = thread->SmiHandle();
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class WeakArray& data = thread->WeakArrayHandle();
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{
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auto vm_isolate_group = Dart::vm_isolate_group();
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data = vm_isolate_group->object_store()->symbol_table();
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CanonicalStringSet table(&key, &value, &data);
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symbol ^= table.GetOrNull(str);
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table.Release();
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}
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if (symbol.IsNull()) {
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IsolateGroup* group = thread->isolate_group();
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ObjectStore* object_store = group->object_store();
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RELEASE_ASSERT(thread->CanAcquireSafepointLocks());
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// Most common case: The symbol is already in the table.
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{
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// We do allow lock-free concurrent read access to the symbol table.
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// Both, the array in the ObjectStore as well as elements in the array
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// are accessed via store-release/load-acquire barriers.
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data = object_store->symbol_table();
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CanonicalStringSet table(&key, &value, &data);
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symbol ^= table.GetOrNull(str);
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table.Release();
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}
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// Otherwise we'll have to get exclusive access and get-or-insert it.
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if (symbol.IsNull()) {
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SafepointMutexLocker ml(group->symbols_mutex());
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data = object_store->symbol_table();
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CanonicalStringSet table(&key, &value, &data);
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symbol ^= table.InsertNewOrGet(str);
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object_store->set_symbol_table(table.Release());
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}
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}
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ASSERT(symbol.IsSymbol());
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ASSERT(symbol.HasHash());
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return symbol.ptr();
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}
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template <typename StringType>
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StringPtr Symbols::Lookup(Thread* thread, const StringType& str) {
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REUSABLE_OBJECT_HANDLESCOPE(thread);
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REUSABLE_SMI_HANDLESCOPE(thread);
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REUSABLE_ARRAY_HANDLESCOPE(thread);
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String& symbol = String::Handle(thread->zone());
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dart::Object& key = thread->ObjectHandle();
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Smi& value = thread->SmiHandle();
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class WeakArray& data = thread->WeakArrayHandle();
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{
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auto vm_isolate_group = Dart::vm_isolate_group();
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data = vm_isolate_group->object_store()->symbol_table();
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CanonicalStringSet table(&key, &value, &data);
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symbol ^= table.GetOrNull(str);
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table.Release();
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}
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if (symbol.IsNull()) {
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IsolateGroup* group = thread->isolate_group();
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ObjectStore* object_store = group->object_store();
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// See `Symbols::NewSymbol` for more information why we separate the two
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// cases.
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if (thread->OwnsSafepoint()) {
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data = object_store->symbol_table();
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CanonicalStringSet table(&key, &value, &data);
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symbol ^= table.GetOrNull(str);
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table.Release();
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} else {
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data = object_store->symbol_table();
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CanonicalStringSet table(&key, &value, &data);
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symbol ^= table.GetOrNull(str);
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table.Release();
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}
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}
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ASSERT(symbol.IsNull() || symbol.IsSymbol());
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ASSERT(symbol.IsNull() || symbol.HasHash());
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return symbol.ptr();
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}
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StringPtr Symbols::LookupFromConcat(Thread* thread,
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const String& str1,
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const String& str2) {
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if (str1.Length() == 0) {
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return Lookup(thread, str2);
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} else if (str2.Length() == 0) {
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return Lookup(thread, str1);
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} else {
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return Lookup(thread, ConcatString(str1, str2));
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}
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}
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StringPtr Symbols::LookupFromGet(Thread* thread, const String& str) {
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return LookupFromConcat(thread, GetterPrefix(), str);
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}
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StringPtr Symbols::LookupFromSet(Thread* thread, const String& str) {
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return LookupFromConcat(thread, SetterPrefix(), str);
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}
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StringPtr Symbols::LookupFromDot(Thread* thread, const String& str) {
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return LookupFromConcat(thread, str, Dot());
|
|
}
|
|
|
|
StringPtr Symbols::New(Thread* thread, const String& str) {
|
|
if (str.IsSymbol()) {
|
|
return str.ptr();
|
|
}
|
|
return New(thread, str, 0, str.Length());
|
|
}
|
|
|
|
StringPtr Symbols::New(Thread* thread,
|
|
const String& str,
|
|
intptr_t begin_index,
|
|
intptr_t len) {
|
|
return NewSymbol(thread, StringSlice(str, begin_index, len));
|
|
}
|
|
|
|
StringPtr Symbols::NewFormatted(Thread* thread, const char* format, ...) {
|
|
va_list args;
|
|
va_start(args, format);
|
|
StringPtr result = NewFormattedV(thread, format, args);
|
|
NoSafepointScope no_safepoint;
|
|
va_end(args);
|
|
return result;
|
|
}
|
|
|
|
StringPtr Symbols::NewFormattedV(Thread* thread,
|
|
const char* format,
|
|
va_list args) {
|
|
va_list args_copy;
|
|
va_copy(args_copy, args);
|
|
intptr_t len = Utils::VSNPrint(nullptr, 0, format, args_copy);
|
|
va_end(args_copy);
|
|
|
|
Zone* zone = Thread::Current()->zone();
|
|
char* buffer = zone->Alloc<char>(len + 1);
|
|
Utils::VSNPrint(buffer, (len + 1), format, args);
|
|
|
|
return Symbols::New(thread, buffer);
|
|
}
|
|
|
|
StringPtr Symbols::FromCharCode(Thread* thread, uint16_t char_code) {
|
|
if (char_code > kMaxOneCharCodeSymbol) {
|
|
return FromUTF16(thread, &char_code, 1);
|
|
}
|
|
return predefined_[char_code];
|
|
}
|
|
|
|
void Symbols::DumpStats(IsolateGroup* isolate_group) {
|
|
intptr_t size = -1;
|
|
intptr_t capacity = -1;
|
|
// First dump VM symbol table stats.
|
|
GetStats(Dart::vm_isolate_group(), &size, &capacity);
|
|
OS::PrintErr("VM Isolate: Number of symbols : %" Pd "\n", size);
|
|
OS::PrintErr("VM Isolate: Symbol table capacity : %" Pd "\n", capacity);
|
|
// Now dump regular isolate symbol table stats.
|
|
GetStats(isolate_group, &size, &capacity);
|
|
OS::PrintErr("Isolate: Number of symbols : %" Pd "\n", size);
|
|
OS::PrintErr("Isolate: Symbol table capacity : %" Pd "\n", capacity);
|
|
// TODO(koda): Consider recording growth and collision stats in HashTable,
|
|
// in DEBUG mode.
|
|
}
|
|
|
|
void Symbols::DumpTable(IsolateGroup* isolate_group) {
|
|
OS::PrintErr("symbols:\n");
|
|
CanonicalStringSet table(isolate_group->object_store()->symbol_table());
|
|
table.Dump();
|
|
table.Release();
|
|
}
|
|
|
|
} // namespace dart
|