folly::symbolizer::Dwarf::Section Class Reference

Public Member Functions
	Section ()
	Section (folly::StringPiece d)
bool	next (folly::StringPiece &chunk)
bool	is64Bit () const

Private Attributes
bool	is64Bit_
folly::StringPiece	data_

Detailed Description

Definition at line 151 of file Dwarf.h.

Constructor & Destructor Documentation

folly::symbolizer::Dwarf::Section::Section ( )

inline

Definition at line 153 of file Dwarf.h.

References cpp.ast::next().

: is64Bit_(false) {}

folly::symbolizer::Dwarf::Section::Section ( folly::StringPiece  d )

explicit

Definition at line 36 of file Dwarf.cpp.

References folly::Range< Iter >::advance(), folly::Range< Iter >::assign(), folly::Range< Iter >::data(), folly::Range< Iter >::empty(), folly::Range< Iter >::end(), FOLLY_SAFE_CHECK, int64_t, is64Bit(), fizz::detail::read(), folly::Range< Iter >::removePrefix(), folly::Range< Iter >::removeSuffix(), folly::Range< Iter >::size(), start, folly::Range< Iter >::startsWith(), folly::T, type, uint64_t, uint8_t, val, value, and x.

: is64Bit_(false), data_(d) {}

Member Function Documentation

bool folly::symbolizer::Dwarf::Section::is64Bit ( ) const

inline

Definition at line 162 of file Dwarf.h.

Referenced by folly::symbolizer::Dwarf::findDebugInfoOffset(), folly::symbolizer::Dwarf::findLocation(), folly::symbolizer::Dwarf::LineNumberVM::LineNumberVM(), and Section().

                         {
      return is64Bit_;
    }

bool folly::symbolizer::Dwarf::Section::next

(

folly::StringPiece &

chunk

)

Definition at line 284 of file Dwarf.cpp.

References folly::Range< Iter >::data(), data_, folly::Range< Iter >::empty(), folly::Range< Iter >::end(), FOLLY_SAFE_CHECK, folly::Range< Iter >::reset(), folly::Range< Iter >::size(), and uint32_t.

Referenced by folly::symbolizer::Dwarf::findDebugInfoOffset(), folly::symbolizer::Dwarf::findLocation(), and folly::symbolizer::Dwarf::LineNumberVM::LineNumberVM().

                                               {
  chunk = data_;
  if (chunk.empty()) {
    return false;
  }

  // Initial length is a uint32_t value for a 32-bit section, and
  // a 96-bit value (0xffffffff followed by the 64-bit length) for a 64-bit
  // section.
  auto initialLength = read<uint32_t>(chunk);
  is64Bit_ = (initialLength == (uint32_t)-1);
  auto length = is64Bit_ ? read<uint64_t>(chunk) : initialLength;
  FOLLY_SAFE_CHECK(length <= chunk.size(), "invalid DWARF section");
  chunk.reset(chunk.data(), length);
  data_.assign(chunk.end(), data_.end());
  return true;
}

Member Data Documentation

folly::StringPiece folly::symbolizer::Dwarf::Section::data_

private

Definition at line 169 of file Dwarf.h.

bool folly::symbolizer::Dwarf::Section::is64Bit_

private

Definition at line 168 of file Dwarf.h.

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

• proxygen/folly/folly/experimental/symbolizer/Dwarf.h
• proxygen/folly/folly/experimental/symbolizer/Dwarf.cpp