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| 1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include <memory> | 5 #include <memory> |
| 6 | 6 |
| 7 #include "src/assembler-inl.h" | 7 #include "src/assembler-inl.h" |
| 8 #include "src/base/adapters.h" | 8 #include "src/base/adapters.h" |
| 9 #include "src/base/atomic-utils.h" | 9 #include "src/base/atomic-utils.h" |
| 10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" |
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| 670 TRACE("Finalizing %d {\n", compiled_module->instance_id()); | 670 TRACE("Finalizing %d {\n", compiled_module->instance_id()); |
| 671 DCHECK(compiled_module->has_weak_wasm_module()); | 671 DCHECK(compiled_module->has_weak_wasm_module()); |
| 672 WeakCell* weak_wasm_module = compiled_module->ptr_to_weak_wasm_module(); | 672 WeakCell* weak_wasm_module = compiled_module->ptr_to_weak_wasm_module(); |
| 673 | 673 |
| 674 // weak_wasm_module may have been cleared, meaning the module object | 674 // weak_wasm_module may have been cleared, meaning the module object |
| 675 // was GC-ed. In that case, there won't be any new instances created, | 675 // was GC-ed. In that case, there won't be any new instances created, |
| 676 // and we don't need to maintain the links between instances. | 676 // and we don't need to maintain the links between instances. |
| 677 if (!weak_wasm_module->cleared()) { | 677 if (!weak_wasm_module->cleared()) { |
| 678 JSObject* wasm_module = JSObject::cast(weak_wasm_module->value()); | 678 JSObject* wasm_module = JSObject::cast(weak_wasm_module->value()); |
| 679 WasmCompiledModule* current_template = | 679 WasmCompiledModule* current_template = |
| 680 WasmCompiledModule::cast(wasm_module->GetInternalField(0)); | 680 WasmCompiledModule::cast(wasm_module->GetEmbedderField(0)); |
| 681 | 681 |
| 682 TRACE("chain before {\n"); | 682 TRACE("chain before {\n"); |
| 683 TRACE_CHAIN(current_template); | 683 TRACE_CHAIN(current_template); |
| 684 TRACE("}\n"); | 684 TRACE("}\n"); |
| 685 | 685 |
| 686 DCHECK(!current_template->has_weak_prev_instance()); | 686 DCHECK(!current_template->has_weak_prev_instance()); |
| 687 WeakCell* next = compiled_module->maybe_ptr_to_weak_next_instance(); | 687 WeakCell* next = compiled_module->maybe_ptr_to_weak_next_instance(); |
| 688 WeakCell* prev = compiled_module->maybe_ptr_to_weak_prev_instance(); | 688 WeakCell* prev = compiled_module->maybe_ptr_to_weak_prev_instance(); |
| 689 | 689 |
| 690 if (current_template == compiled_module) { | 690 if (current_template == compiled_module) { |
| 691 if (next == nullptr) { | 691 if (next == nullptr) { |
| 692 ResetCompiledModule(isolate, owner, compiled_module); | 692 ResetCompiledModule(isolate, owner, compiled_module); |
| 693 } else { | 693 } else { |
| 694 DCHECK(next->value()->IsFixedArray()); | 694 DCHECK(next->value()->IsFixedArray()); |
| 695 wasm_module->SetInternalField(0, next->value()); | 695 wasm_module->SetEmbedderField(0, next->value()); |
| 696 DCHECK_NULL(prev); | 696 DCHECK_NULL(prev); |
| 697 WasmCompiledModule::cast(next->value())->reset_weak_prev_instance(); | 697 WasmCompiledModule::cast(next->value())->reset_weak_prev_instance(); |
| 698 } | 698 } |
| 699 } else { | 699 } else { |
| 700 DCHECK(!(prev == nullptr && next == nullptr)); | 700 DCHECK(!(prev == nullptr && next == nullptr)); |
| 701 // the only reason prev or next would be cleared is if the | 701 // the only reason prev or next would be cleared is if the |
| 702 // respective objects got collected, but if that happened, | 702 // respective objects got collected, but if that happened, |
| 703 // we would have relinked the list. | 703 // we would have relinked the list. |
| 704 if (prev != nullptr) { | 704 if (prev != nullptr) { |
| 705 DCHECK(!prev->cleared()); | 705 DCHECK(!prev->cleared()); |
| 706 if (next == nullptr) { | 706 if (next == nullptr) { |
| 707 WasmCompiledModule::cast(prev->value())->reset_weak_next_instance(); | 707 WasmCompiledModule::cast(prev->value())->reset_weak_next_instance(); |
| 708 } else { | 708 } else { |
| 709 WasmCompiledModule::cast(prev->value()) | 709 WasmCompiledModule::cast(prev->value()) |
| 710 ->set_ptr_to_weak_next_instance(next); | 710 ->set_ptr_to_weak_next_instance(next); |
| 711 } | 711 } |
| 712 } | 712 } |
| 713 if (next != nullptr) { | 713 if (next != nullptr) { |
| 714 DCHECK(!next->cleared()); | 714 DCHECK(!next->cleared()); |
| 715 if (prev == nullptr) { | 715 if (prev == nullptr) { |
| 716 WasmCompiledModule::cast(next->value())->reset_weak_prev_instance(); | 716 WasmCompiledModule::cast(next->value())->reset_weak_prev_instance(); |
| 717 } else { | 717 } else { |
| 718 WasmCompiledModule::cast(next->value()) | 718 WasmCompiledModule::cast(next->value()) |
| 719 ->set_ptr_to_weak_prev_instance(prev); | 719 ->set_ptr_to_weak_prev_instance(prev); |
| 720 } | 720 } |
| 721 } | 721 } |
| 722 } | 722 } |
| 723 TRACE("chain after {\n"); | 723 TRACE("chain after {\n"); |
| 724 TRACE_CHAIN(WasmCompiledModule::cast(wasm_module->GetInternalField(0))); | 724 TRACE_CHAIN(WasmCompiledModule::cast(wasm_module->GetEmbedderField(0))); |
| 725 TRACE("}\n"); | 725 TRACE("}\n"); |
| 726 } | 726 } |
| 727 compiled_module->reset_weak_owning_instance(); | 727 compiled_module->reset_weak_owning_instance(); |
| 728 GlobalHandles::Destroy(reinterpret_cast<Object**>(p)); | 728 GlobalHandles::Destroy(reinterpret_cast<Object**>(p)); |
| 729 TRACE("}\n"); | 729 TRACE("}\n"); |
| 730 } | 730 } |
| 731 | 731 |
| 732 std::pair<int, int> GetFunctionOffsetAndLength( | 732 std::pair<int, int> GetFunctionOffsetAndLength( |
| 733 Handle<WasmCompiledModule> compiled_module, int func_index) { | 733 Handle<WasmCompiledModule> compiled_module, int func_index) { |
| 734 WasmModule* module = compiled_module->module(); | 734 WasmModule* module = compiled_module->module(); |
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| 1278 // Publish the new instance to the instances chain. | 1278 // Publish the new instance to the instances chain. |
| 1279 { | 1279 { |
| 1280 DisallowHeapAllocation no_gc; | 1280 DisallowHeapAllocation no_gc; |
| 1281 if (!link_to_original.is_null()) { | 1281 if (!link_to_original.is_null()) { |
| 1282 compiled_module_->set_weak_next_instance( | 1282 compiled_module_->set_weak_next_instance( |
| 1283 link_to_original.ToHandleChecked()); | 1283 link_to_original.ToHandleChecked()); |
| 1284 original.ToHandleChecked()->set_weak_prev_instance(link_to_clone); | 1284 original.ToHandleChecked()->set_weak_prev_instance(link_to_clone); |
| 1285 compiled_module_->set_weak_wasm_module( | 1285 compiled_module_->set_weak_wasm_module( |
| 1286 original.ToHandleChecked()->weak_wasm_module()); | 1286 original.ToHandleChecked()->weak_wasm_module()); |
| 1287 } | 1287 } |
| 1288 module_object_->SetInternalField(0, *compiled_module_); | 1288 module_object_->SetEmbedderField(0, *compiled_module_); |
| 1289 compiled_module_->set_weak_owning_instance(link_to_owning_instance); | 1289 compiled_module_->set_weak_owning_instance(link_to_owning_instance); |
| 1290 GlobalHandles::MakeWeak(global_handle.location(), | 1290 GlobalHandles::MakeWeak(global_handle.location(), |
| 1291 global_handle.location(), &InstanceFinalizer, | 1291 global_handle.location(), &InstanceFinalizer, |
| 1292 v8::WeakCallbackType::kFinalizer); | 1292 v8::WeakCallbackType::kFinalizer); |
| 1293 } | 1293 } |
| 1294 } | 1294 } |
| 1295 | 1295 |
| 1296 //-------------------------------------------------------------------------- | 1296 //-------------------------------------------------------------------------- |
| 1297 // Set all breakpoints that were set on the shared module. | 1297 // Set all breakpoints that were set on the shared module. |
| 1298 //-------------------------------------------------------------------------- | 1298 //-------------------------------------------------------------------------- |
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| 2721 Handle<String> module_property_name = | 2721 Handle<String> module_property_name = |
| 2722 isolate->factory()->InternalizeUtf8String("module"); | 2722 isolate->factory()->InternalizeUtf8String("module"); |
| 2723 Handle<String> instance_property_name = | 2723 Handle<String> instance_property_name = |
| 2724 isolate->factory()->InternalizeUtf8String("instance"); | 2724 isolate->factory()->InternalizeUtf8String("instance"); |
| 2725 JSObject::AddProperty(ret, module_property_name, module, NONE); | 2725 JSObject::AddProperty(ret, module_property_name, module, NONE); |
| 2726 JSObject::AddProperty(ret, instance_property_name, | 2726 JSObject::AddProperty(ret, instance_property_name, |
| 2727 instance_object.ToHandleChecked(), NONE); | 2727 instance_object.ToHandleChecked(), NONE); |
| 2728 | 2728 |
| 2729 ResolvePromise(isolate, promise, ret); | 2729 ResolvePromise(isolate, promise, ret); |
| 2730 } | 2730 } |
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