mirror of
https://github.com/dart-lang/sdk
synced 2024-11-02 12:24:24 +00:00
3ec7cf9c34
TEST=language/record_literal_test Issue: https://github.com/dart-lang/sdk/issues/49719 Change-Id: I287586c0adb19fe401d76c7a586133a1fe9f1d1d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/257264 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
381 lines
14 KiB
C++
381 lines
14 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/stub_code.h"
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#include "platform/assert.h"
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#include "platform/globals.h"
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#include "vm/app_snapshot.h"
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#include "vm/compiler/assembler/disassembler.h"
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#include "vm/flags.h"
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#include "vm/heap/safepoint.h"
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#include "vm/object_store.h"
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#include "vm/snapshot.h"
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#include "vm/virtual_memory.h"
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#include "vm/visitor.h"
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#if !defined(DART_PRECOMPILED_RUNTIME)
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#include "vm/compiler/aot/precompiler.h"
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#include "vm/compiler/assembler/assembler.h"
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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namespace dart {
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DECLARE_FLAG(bool, precompiled_mode);
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StubCode::StubCodeEntry StubCode::entries_[kNumStubEntries] = {
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#if defined(DART_PRECOMPILED_RUNTIME)
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#define STUB_CODE_DECLARE(name) {nullptr, #name},
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#else
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#define STUB_CODE_DECLARE(name) \
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{nullptr, #name, compiler::StubCodeCompiler::Generate##name##Stub},
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#endif
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VM_STUB_CODE_LIST(STUB_CODE_DECLARE)
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#undef STUB_CODE_DECLARE
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};
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AcqRelAtomic<bool> StubCode::initialized_ = {false};
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#if defined(DART_PRECOMPILED_RUNTIME)
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void StubCode::Init() {
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// Stubs will be loaded from the snapshot.
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UNREACHABLE();
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}
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#else
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void StubCode::Init() {
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compiler::ObjectPoolBuilder object_pool_builder;
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// Generate all the stubs.
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for (size_t i = 0; i < ARRAY_SIZE(entries_); i++) {
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entries_[i].code = Code::ReadOnlyHandle();
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*(entries_[i].code) =
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Generate(entries_[i].name, &object_pool_builder, entries_[i].generator);
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}
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const ObjectPool& object_pool =
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ObjectPool::Handle(ObjectPool::NewFromBuilder(object_pool_builder));
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for (size_t i = 0; i < ARRAY_SIZE(entries_); i++) {
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entries_[i].code->set_object_pool(object_pool.ptr());
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}
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InitializationDone();
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#if defined(DART_PRECOMPILER)
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{
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// Set Function owner for UnknownDartCode stub so it pretends to
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// be a Dart code.
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Zone* zone = Thread::Current()->zone();
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const auto& signature = FunctionType::Handle(zone, FunctionType::New());
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auto& owner = Object::Handle(zone);
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owner = Object::void_class();
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ASSERT(!owner.IsNull());
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owner = Function::New(signature, Object::null_string(),
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UntaggedFunction::kRegularFunction,
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/*is_static=*/true,
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/*is_const=*/false,
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/*is_abstract=*/false,
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/*is_external=*/false,
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/*is_native=*/false, owner, TokenPosition::kNoSource);
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StubCode::UnknownDartCode().set_owner(owner);
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StubCode::UnknownDartCode().set_exception_handlers(
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Object::empty_exception_handlers());
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StubCode::UnknownDartCode().set_pc_descriptors(Object::empty_descriptors());
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ASSERT(StubCode::UnknownDartCode().IsFunctionCode());
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}
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#endif // defined(DART_PRECOMPILER)
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}
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#undef STUB_CODE_GENERATE
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#undef STUB_CODE_SET_OBJECT_POOL
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CodePtr StubCode::Generate(
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const char* name,
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compiler::ObjectPoolBuilder* object_pool_builder,
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void (*GenerateStub)(compiler::Assembler* assembler)) {
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auto thread = Thread::Current();
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SafepointWriteRwLocker ml(thread, thread->isolate_group()->program_lock());
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compiler::Assembler assembler(object_pool_builder);
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GenerateStub(&assembler);
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const Code& code = Code::Handle(Code::FinalizeCodeAndNotify(
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name, nullptr, &assembler, Code::PoolAttachment::kNotAttachPool,
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/*optimized=*/false));
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#ifndef PRODUCT
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if (FLAG_support_disassembler && FLAG_disassemble_stubs) {
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Disassembler::DisassembleStub(name, code);
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}
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#endif // !PRODUCT
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return code.ptr();
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}
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#endif // defined(DART_PRECOMPILED_RUNTIME)
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void StubCode::Cleanup() {
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initialized_.store(false, std::memory_order_release);
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for (size_t i = 0; i < ARRAY_SIZE(entries_); i++) {
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entries_[i].code = nullptr;
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}
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}
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bool StubCode::InInvocationStub(uword pc) {
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ASSERT(HasBeenInitialized());
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uword entry = StubCode::InvokeDartCode().EntryPoint();
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uword size = StubCode::InvokeDartCodeSize();
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return (pc >= entry) && (pc < (entry + size));
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}
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bool StubCode::InJumpToFrameStub(uword pc) {
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ASSERT(HasBeenInitialized());
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uword entry = StubCode::JumpToFrame().EntryPoint();
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uword size = StubCode::JumpToFrameSize();
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return (pc >= entry) && (pc < (entry + size));
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}
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#if !defined(DART_PRECOMPILED_RUNTIME)
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ArrayPtr compiler::StubCodeCompiler::BuildStaticCallsTable(
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Zone* zone,
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compiler::UnresolvedPcRelativeCalls* unresolved_calls) {
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if (unresolved_calls->length() == 0) {
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return Array::null();
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}
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const intptr_t array_length =
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unresolved_calls->length() * Code::kSCallTableEntryLength;
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const auto& static_calls_table =
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Array::Handle(zone, Array::New(array_length, Heap::kOld));
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StaticCallsTable entries(static_calls_table);
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auto& kind_type_and_offset = Smi::Handle(zone);
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for (intptr_t i = 0; i < unresolved_calls->length(); i++) {
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auto& unresolved_call = (*unresolved_calls)[i];
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auto call_kind = unresolved_call->is_tail_call() ? Code::kPcRelativeTailCall
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: Code::kPcRelativeCall;
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kind_type_and_offset =
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Smi::New(Code::KindField::encode(call_kind) |
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Code::EntryPointField::encode(Code::kDefaultEntry) |
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Code::OffsetField::encode(unresolved_call->offset()));
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auto view = entries[i];
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view.Set<Code::kSCallTableKindAndOffset>(kind_type_and_offset);
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view.Set<Code::kSCallTableCodeOrTypeTarget>(unresolved_call->target());
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}
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return static_calls_table.ptr();
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}
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CodePtr StubCode::GetAllocationStubForClass(const Class& cls) {
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Thread* thread = Thread::Current();
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auto object_store = thread->isolate_group()->object_store();
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Zone* zone = thread->zone();
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const Error& error =
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Error::Handle(zone, cls.EnsureIsAllocateFinalized(thread));
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ASSERT(error.IsNull());
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switch (cls.id()) {
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case kArrayCid:
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return object_store->allocate_array_stub();
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#if !defined(TARGET_ARCH_IA32)
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case kGrowableObjectArrayCid:
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return object_store->allocate_growable_array_stub();
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#endif // !defined(TARGET_ARCH_IA32)
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case kContextCid:
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return object_store->allocate_context_stub();
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case kUnhandledExceptionCid:
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return object_store->allocate_unhandled_exception_stub();
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case kMintCid:
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return object_store->allocate_mint_stub();
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case kDoubleCid:
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return object_store->allocate_double_stub();
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case kFloat32x4Cid:
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return object_store->allocate_float32x4_stub();
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case kFloat64x2Cid:
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return object_store->allocate_float64x2_stub();
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case kInt32x4Cid:
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return object_store->allocate_int32x4_stub();
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case kClosureCid:
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return object_store->allocate_closure_stub();
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case kRecordCid:
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return object_store->allocate_record_stub();
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}
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Code& stub = Code::Handle(zone, cls.allocation_stub());
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if (stub.IsNull()) {
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compiler::ObjectPoolBuilder object_pool_builder;
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Precompiler* precompiler = Precompiler::Instance();
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compiler::ObjectPoolBuilder* wrapper =
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precompiler != NULL ? precompiler->global_object_pool_builder()
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: &object_pool_builder;
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const auto pool_attachment = FLAG_precompiled_mode
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? Code::PoolAttachment::kNotAttachPool
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: Code::PoolAttachment::kAttachPool;
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auto zone = thread->zone();
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auto object_store = thread->isolate_group()->object_store();
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auto& allocate_object_stub = Code::ZoneHandle(zone);
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auto& allocate_object_parametrized_stub = Code::ZoneHandle(zone);
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if (FLAG_precompiled_mode) {
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allocate_object_stub = object_store->allocate_object_stub();
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allocate_object_parametrized_stub =
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object_store->allocate_object_parametrized_stub();
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}
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compiler::Assembler assembler(wrapper);
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compiler::UnresolvedPcRelativeCalls unresolved_calls;
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const char* name = cls.ToCString();
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compiler::StubCodeCompiler::GenerateAllocationStubForClass(
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&assembler, &unresolved_calls, cls, allocate_object_stub,
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allocate_object_parametrized_stub);
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const auto& static_calls_table =
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Array::Handle(zone, compiler::StubCodeCompiler::BuildStaticCallsTable(
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zone, &unresolved_calls));
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SafepointWriteRwLocker ml(thread, thread->isolate_group()->program_lock());
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auto mutator_fun = [&]() {
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stub = Code::FinalizeCode(nullptr, &assembler, pool_attachment,
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/*optimized=*/false,
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/*stats=*/nullptr);
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// Check if some other thread has not already added the stub.
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if (cls.allocation_stub() == Code::null()) {
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stub.set_owner(cls);
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if (!static_calls_table.IsNull()) {
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stub.set_static_calls_target_table(static_calls_table);
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}
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cls.set_allocation_stub(stub);
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}
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};
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// We have to ensure no mutators are running, because:
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//
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// a) We allocate an instructions object, which might cause us to
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// temporarily flip page protections from (RX -> RW -> RX).
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thread->isolate_group()->RunWithStoppedMutators(mutator_fun,
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/*use_force_growth=*/true);
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// We notify code observers after finalizing the code in order to be
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// outside a [SafepointOperationScope].
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Code::NotifyCodeObservers(name, stub, /*optimized=*/false);
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#ifndef PRODUCT
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if (FLAG_support_disassembler && FLAG_disassemble_stubs) {
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Disassembler::DisassembleStub(name, stub);
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}
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#endif // !PRODUCT
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}
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return stub.ptr();
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}
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CodePtr StubCode::GetAllocationStubForTypedData(classid_t class_id) {
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auto object_store = Thread::Current()->isolate_group()->object_store();
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switch (class_id) {
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case kTypedDataInt8ArrayCid:
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return object_store->allocate_int8_array_stub();
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case kTypedDataUint8ArrayCid:
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return object_store->allocate_uint8_array_stub();
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case kTypedDataUint8ClampedArrayCid:
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return object_store->allocate_uint8_clamped_array_stub();
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case kTypedDataInt16ArrayCid:
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return object_store->allocate_int16_array_stub();
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case kTypedDataUint16ArrayCid:
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return object_store->allocate_uint16_array_stub();
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case kTypedDataInt32ArrayCid:
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return object_store->allocate_int32_array_stub();
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case kTypedDataUint32ArrayCid:
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return object_store->allocate_uint32_array_stub();
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case kTypedDataInt64ArrayCid:
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return object_store->allocate_int64_array_stub();
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case kTypedDataUint64ArrayCid:
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return object_store->allocate_uint64_array_stub();
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case kTypedDataFloat32ArrayCid:
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return object_store->allocate_float32_array_stub();
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case kTypedDataFloat64ArrayCid:
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return object_store->allocate_float64_array_stub();
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case kTypedDataFloat32x4ArrayCid:
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return object_store->allocate_float32x4_array_stub();
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case kTypedDataInt32x4ArrayCid:
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return object_store->allocate_int32x4_array_stub();
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case kTypedDataFloat64x2ArrayCid:
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return object_store->allocate_float64x2_array_stub();
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}
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UNREACHABLE();
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return Code::null();
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}
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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#if !defined(TARGET_ARCH_IA32)
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CodePtr StubCode::GetBuildMethodExtractorStub(compiler::ObjectPoolBuilder* pool,
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bool generic) {
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#if !defined(DART_PRECOMPILED_RUNTIME)
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auto thread = Thread::Current();
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auto Z = thread->zone();
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auto object_store = thread->isolate_group()->object_store();
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const auto& closure_allocation_stub =
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Code::ZoneHandle(Z, object_store->allocate_closure_stub());
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const auto& context_allocation_stub =
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Code::ZoneHandle(Z, object_store->allocate_context_stub());
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compiler::ObjectPoolBuilder object_pool_builder;
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compiler::Assembler assembler(pool != nullptr ? pool : &object_pool_builder);
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compiler::StubCodeCompiler::GenerateBuildMethodExtractorStub(
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&assembler, closure_allocation_stub, context_allocation_stub, generic);
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const char* name = generic ? "BuildGenericMethodExtractor"
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: "BuildNonGenericMethodExtractor";
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const Code& stub = Code::Handle(Code::FinalizeCodeAndNotify(
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name, nullptr, &assembler, Code::PoolAttachment::kNotAttachPool,
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/*optimized=*/false));
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if (pool == nullptr) {
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stub.set_object_pool(ObjectPool::NewFromBuilder(object_pool_builder));
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}
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#ifndef PRODUCT
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if (FLAG_support_disassembler && FLAG_disassemble_stubs) {
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Disassembler::DisassembleStub(name, stub);
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}
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#endif // !PRODUCT
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return stub.ptr();
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#else // !defined(DART_PRECOMPILED_RUNTIME)
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UNIMPLEMENTED();
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return nullptr;
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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}
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#endif // !defined(TARGET_ARCH_IA32)
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const Code& StubCode::UnoptimizedStaticCallEntry(intptr_t num_args_tested) {
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switch (num_args_tested) {
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case 0:
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return ZeroArgsUnoptimizedStaticCall();
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case 1:
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return OneArgUnoptimizedStaticCall();
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case 2:
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return TwoArgsUnoptimizedStaticCall();
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default:
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UNIMPLEMENTED();
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return Code::Handle();
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}
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}
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const char* StubCode::NameOfStub(uword entry_point) {
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for (size_t i = 0; i < ARRAY_SIZE(entries_); i++) {
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if ((entries_[i].code != nullptr) && !entries_[i].code->IsNull() &&
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(entries_[i].code->EntryPoint() == entry_point)) {
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return entries_[i].name;
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}
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}
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auto object_store = IsolateGroup::Current()->object_store();
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#define MATCH(member, name) \
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if (object_store->member() != Code::null() && \
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entry_point == Code::EntryPointOf(object_store->member())) { \
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return "_iso_stub_" #name "Stub"; \
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}
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OBJECT_STORE_STUB_CODE_LIST(MATCH)
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MATCH(build_generic_method_extractor_code, BuildGenericMethodExtractor)
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MATCH(build_nongeneric_method_extractor_code, BuildNonGenericMethodExtractor)
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#undef MATCH
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return nullptr;
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}
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} // namespace dart
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