CpuProfiler: move StringsStorage class to separate source and header files.

src/strings-storage.cc

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#include "src/strings-storage.h"
+
+
+namespace v8 {
+namespace internal {
+
+
+bool StringsStorage::StringsMatch(void* key1, void* key2) {
+  return strcmp(reinterpret_cast<char*>(key1), reinterpret_cast<char*>(key2)) ==
+         0;
+}
+
+
+StringsStorage::StringsStorage(Heap* heap)
+    : hash_seed_(heap->HashSeed()), names_(StringsMatch) {}
+
+
+StringsStorage::~StringsStorage() {
+  for (HashMap::Entry* p = names_.Start(); p != NULL; p = names_.Next(p)) {
+    DeleteArray(reinterpret_cast<const char*>(p->value));
+  }
+}
+
+
+const char* StringsStorage::GetCopy(const char* src) {
+  int len = static_cast<int>(strlen(src));
+  HashMap::Entry* entry = GetEntry(src, len);
+  if (entry->value == NULL) {
+    Vector<char> dst = Vector<char>::New(len + 1);
+    StrNCpy(dst, src, len);
+    dst[len] = '\0';
+    entry->key = dst.start();
+    entry->value = entry->key;
+  }
+  return reinterpret_cast<const char*>(entry->value);
+}
+
+
+const char* StringsStorage::GetFormatted(const char* format, ...) {
+  va_list args;
+  va_start(args, format);
+  const char* result = GetVFormatted(format, args);
+  va_end(args);
+  return result;
+}
+
+
+const char* StringsStorage::AddOrDisposeString(char* str, int len) {
+  HashMap::Entry* entry = GetEntry(str, len);
+  if (entry->value == NULL) {
+    // New entry added.
+    entry->key = str;
+    entry->value = str;
+  } else {
+    DeleteArray(str);
+  }
+  return reinterpret_cast<const char*>(entry->value);
+}
+
+
+const char* StringsStorage::GetVFormatted(const char* format, va_list args) {
+  Vector<char> str = Vector<char>::New(1024);
+  int len = VSNPrintF(str, format, args);
+  if (len == -1) {
+    DeleteArray(str.start());
+    return GetCopy(format);
+  }
+  return AddOrDisposeString(str.start(), len);
+}
+
+
+const char* StringsStorage::GetName(Name* name) {
+  if (name->IsString()) {
+    String* str = String::cast(name);
+    int length = Min(kMaxNameSize, str->length());
+    int actual_length = 0;
+    SmartArrayPointer<char> data = str->ToCString(
+        DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL, 0, length, &actual_length);
+    return AddOrDisposeString(data.Detach(), actual_length);
+  } else if (name->IsSymbol()) {
+    return "<symbol>";
+  }
+  return "";
+}
+
+
+const char* StringsStorage::GetName(int index) {
+  return GetFormatted("%d", index);
+}
+
+
+const char* StringsStorage::GetFunctionName(Name* name) {
+  return GetName(name);
+}
+
+
+const char* StringsStorage::GetFunctionName(const char* name) {
+  return GetCopy(name);
+}
+
+
+size_t StringsStorage::GetUsedMemorySize() const {
+  size_t size = sizeof(*this);
+  size += sizeof(HashMap::Entry) * names_.capacity();
+  for (HashMap::Entry* p = names_.Start(); p != NULL; p = names_.Next(p)) {
+    size += strlen(reinterpret_cast<const char*>(p->value)) + 1;
+  }
+  return size;
+}
+
+
+HashMap::Entry* StringsStorage::GetEntry(const char* str, int len) {
+  uint32_t hash = StringHasher::HashSequentialString(str, len, hash_seed_);
+  return names_.Lookup(const_cast<char*>(str), hash, true);
+}
+}
+}  // namespace v8::internal