1 // Copyright 2016 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_EXTERNAL_REFERENCE_TABLE_H_ 6 #define V8_EXTERNAL_REFERENCE_TABLE_H_ 7 8 #include "src/address-map.h" 9 10 namespace v8 { 11 namespace internal { 12 13 class Isolate; 14 15 // ExternalReferenceTable is a helper class that defines the relationship 16 // between external references and their encodings. It is used to build 17 // hashmaps in ExternalReferenceEncoder and ExternalReferenceDecoder. 18 class ExternalReferenceTable { 19 public: 20 static ExternalReferenceTable* instance(Isolate* isolate); 21 22 uint32_t size() const { return static_cast<uint32_t>(refs_.length()); } 23 Address address(uint32_t i) { return refs_[i].address; } 24 const char* name(uint32_t i) { return refs_[i].name; } 25 bool is_api_reference(uint32_t i) { return i >= api_refs_start_; } 26 27 #ifdef DEBUG 28 void increment_count(uint32_t i) { refs_[i].count++; } 29 int count(uint32_t i) { return refs_[i].count; } 30 void ResetCount(); 31 void PrintCount(); 32 #endif // DEBUG 33 34 static const char* ResolveSymbol(void* address); 35 36 static const int kDeoptTableSerializeEntryCount = 64; 37 38 private: 39 struct ExternalReferenceEntry { 40 Address address; 41 const char* name; 42 #ifdef DEBUG 43 int count; 44 #endif // DEBUG 45 }; 46 47 explicit ExternalReferenceTable(Isolate* isolate); 48 49 void Add(Address address, const char* name) { 50 #ifdef DEBUG 51 ExternalReferenceEntry entry = {address, name, 0}; 52 #else 53 ExternalReferenceEntry entry = {address, name}; 54 #endif // DEBUG 55 refs_.Add(entry); 56 } 57 58 void AddReferences(Isolate* isolate); 59 void AddBuiltins(Isolate* isolate); 60 void AddRuntimeFunctions(Isolate* isolate); 61 void AddIsolateAddresses(Isolate* isolate); 62 void AddAccessors(Isolate* isolate); 63 void AddStubCache(Isolate* isolate); 64 void AddDeoptEntries(Isolate* isolate); 65 void AddApiReferences(Isolate* isolate); 66 67 List<ExternalReferenceEntry> refs_; 68 uint32_t api_refs_start_; 69 70 DISALLOW_COPY_AND_ASSIGN(ExternalReferenceTable); 71 }; 72 73 } // namespace internal 74 } // namespace v8 75 #endif // V8_EXTERNAL_REFERENCE_TABLE_H_ 76
