dart::CatchEntryMovesMapBuilder Class Reference

#include <code_descriptors.h>

Inheritance diagram for dart::CatchEntryMovesMapBuilder:

Classes
class	TrieNode

Public Member Functions
	CatchEntryMovesMapBuilder ()
void	NewMapping (intptr_t pc_offset)
void	Append (const CatchEntryMove &move)
void	EndMapping ()
TypedDataPtr	FinalizeCatchEntryMovesMap ()
Public Member Functions inherited from dart::ZoneAllocated
	ZoneAllocated ()
void *	operator new (size_t size)
void *	operator new (size_t size, Zone *zone)
void	operator delete (void *pointer)

Detailed Description

Definition at line 149 of file code_descriptors.h.

Constructor & Destructor Documentation

CatchEntryMovesMapBuilder()

dart::CatchEntryMovesMapBuilder::CatchEntryMovesMapBuilder

(

)

Definition at line 185 of file code_descriptors.cc.

    : zone_(Thread::Current()->zone()),
      root_(new TrieNode()),
      current_pc_offset_(0),
      stream_(zone_, 64) {}

Member Function Documentation

Append()

void dart::CatchEntryMovesMapBuilder::Append

(

const CatchEntryMove &

move

)

Definition at line 191 of file code_descriptors.cc.

                                                                 {
  moves_.Add(move);
}

EndMapping()

void dart::CatchEntryMovesMapBuilder::EndMapping

(

)

Definition at line 200 of file code_descriptors.cc.

                                           {
  intptr_t suffix_length = 0;
  TrieNode* suffix = root_;
  // Find the largest common suffix, get the last node of the path.
  for (intptr_t i = moves_.length() - 1; i >= 0; i--) {
    TrieNode* n = suffix->Follow(moves_[i]);
    if (n == nullptr) break;
    suffix_length++;
    suffix = n;
  }
  intptr_t length = moves_.length() - suffix_length;
  intptr_t current_offset = stream_.bytes_written();
 
  typedef ZoneWriteStream::Raw<sizeof(intptr_t), intptr_t> Writer;
  Writer::Write(&stream_, current_pc_offset_);
  Writer::Write(&stream_, length);
  Writer::Write(&stream_, suffix_length);
  Writer::Write(&stream_, suffix->Offset());
 
  // Write the unshared part, adding it to the trie.
  TrieNode* node = suffix;
  for (intptr_t i = length - 1; i >= 0; i--) {
    moves_[i].WriteTo(&stream_);
 
    TrieNode* child = new (zone_) TrieNode(moves_[i], current_offset);
    node->Insert(child);
    node = child;
  }
}

FinalizeCatchEntryMovesMap()

TypedDataPtr dart::CatchEntryMovesMapBuilder::FinalizeCatchEntryMovesMap

(

)

Definition at line 230 of file code_descriptors.cc.

                                                                   {
  TypedData& td = TypedData::Handle(TypedData::New(
      kTypedDataInt8ArrayCid, stream_.bytes_written(), Heap::kOld));
  NoSafepointScope no_safepoint;
  uint8_t* dest = reinterpret_cast<uint8_t*>(td.DataAddr(0));
  uint8_t* src = stream_.buffer();
  for (intptr_t i = 0; i < stream_.bytes_written(); i++) {
    dest[i] = src[i];
  }
  return td.ptr();
}

NewMapping()

void dart::CatchEntryMovesMapBuilder::NewMapping

(

intptr_t

pc_offset

)

Definition at line 195 of file code_descriptors.cc.

                                                             {
  moves_.Clear();
  current_pc_offset_ = pc_offset;
}

---

The documentation for this class was generated from the following files:

• third_party/dart-lang/sdk/runtime/vm/code_descriptors.h
• third_party/dart-lang/sdk/runtime/vm/code_descriptors.cc