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 26 #ifdef DEBUG 27 void increment_count(uint32_t i) { refs_[i].count++; } 28 int count(uint32_t i) { return refs_[i].count; } 29 void ResetCount(); 30 void PrintCount(); 31 #endif // DEBUG 32 33 static const char* ResolveSymbol(void* address); 34 35 static const int kDeoptTableSerializeEntryCount = 64; 36 37 private: 38 struct ExternalReferenceEntry { 39 Address address; 40 const char* name; 41 #ifdef DEBUG 42 int count; 43 #endif // DEBUG 44 }; 45 46 explicit ExternalReferenceTable(Isolate* isolate); 47 48 void Add(Address address, const char* name) { 49 #ifdef DEBUG 50 ExternalReferenceEntry entry = {address, name, 0}; 51 #else 52 ExternalReferenceEntry entry = {address, name}; 53 #endif // DEBUG 54 refs_.Add(entry); 55 } 56 57 void AddReferences(Isolate* isolate); 58 void AddBuiltins(Isolate* isolate); 59 void AddRuntimeFunctions(Isolate* isolate); 60 void AddIsolateAddresses(Isolate* isolate); 61 void AddAccessors(Isolate* isolate); 62 void AddStubCache(Isolate* isolate); 63 void AddDeoptEntries(Isolate* isolate); 64 void AddApiReferences(Isolate* isolate); 65 66 List<ExternalReferenceEntry> refs_; 67 68 DISALLOW_COPY_AND_ASSIGN(ExternalReferenceTable); 69 }; 70 71 } // namespace internal 72 } // namespace v8 73 #endif // V8_EXTERNAL_REFERENCE_TABLE_H_ 74
