LIEF::dwarf::CompilationUnit Class Reference

This class represents a DWARF compilation unit. More...

#include <CompilationUnit.hpp>

Classes
class	Iterator
class	Language
	Languages supported by the DWARF (v5) format. See: https://dwarfstd.org/languages.html. More...

Public Types
using	functions_it = iterator_range<Function::Iterator>
	Iterator over the dwarf::Function.
using	types_it = iterator_range<Type::Iterator>
	Iterator over the dwarf::Type.
using	vars_it = iterator_range<Variable::Iterator>
	Iterator over the CompilationUnit's variables.

Public Member Functions
	CompilationUnit (std::unique_ptr< details::CompilationUnit > impl)
	~CompilationUnit ()
std::string	name () const
	Name of the file associated with this compilation unit (e.g. test.cpp) Return an empty string if the name is not found or can't be resolved.
std::string	producer () const
	Information about the program (or library) that generated this compilation unit. For instance, it can output: Debian clang version 17.0.6.
std::string	compilation_dir () const
	Return the path to the directory in which the compilation took place for compiling this compilation unit (e.g. /workdir/build)
Language	language () const
	Original Language of this compilation unit.
uint64_t	low_address () const
	Return the lowest virtual address owned by this compilation unit.
uint64_t	high_address () const
	Return the highest virtual address owned by this compilation unit.
uint64_t	size () const
	Return the size of the compilation unit according to its range of address.
std::vector< range_t >	ranges () const
	Return a list of address ranges owned by this compilation unit.
std::unique_ptr< Function >	find_function (const std::string &name) const
	Try to find the function whose name is given in parameter.
std::unique_ptr< Function >	find_function (uint64_t addr) const
	Try to find the function at the given address.
std::unique_ptr< Variable >	find_variable (uint64_t addr) const
	Try to find the Variable at the given address.
std::unique_ptr< Variable >	find_variable (const std::string &name) const
	Try to find the Variable with the given name.
functions_it	functions () const
	Return an iterator over the functions implemented in this compilation unit.
functions_it	imported_functions () const
	Return an iterator over the functions imported in this compilation unit but not implemented.
types_it	types () const
	Return an iterator over the different types defined in this compilation unit.
vars_it	variables () const
	Return an iterator over all the variables defined in the this compilation unit:

Detailed Description

This class represents a DWARF compilation unit.

Member Typedef Documentation

functions_it

using LIEF::dwarf::CompilationUnit::functions_it = iterator_range<Function::Iterator>

Iterator over the dwarf::Function.

types_it

using LIEF::dwarf::CompilationUnit::types_it = iterator_range<Type::Iterator>

Iterator over the dwarf::Type.

vars_it

using LIEF::dwarf::CompilationUnit::vars_it = iterator_range<Variable::Iterator>

Iterator over the CompilationUnit's variables.

Constructor & Destructor Documentation

CompilationUnit()

LIEF::dwarf::CompilationUnit::CompilationUnit

(

std::unique_ptr< details::CompilationUnit >

impl

)

~CompilationUnit()

LIEF::dwarf::CompilationUnit::~CompilationUnit

(

)

Member Function Documentation

compilation_dir()

std::string LIEF::dwarf::CompilationUnit::compilation_dir

(

)

const

Return the path to the directory in which the compilation took place for compiling this compilation unit (e.g. /workdir/build)

It returns an empty string if the entry is not present or can't be resolved

This value matches the DW_AT_comp_dir attribute

find_function() [1/2]

std::unique_ptr< Function > LIEF::dwarf::CompilationUnit::find_function

(

const std::string &

name

)

const

Try to find the function whose name is given in parameter.

The provided name can be demangled

find_function() [2/2]

std::unique_ptr< Function > LIEF::dwarf::CompilationUnit::find_function

(

uint64_t

addr

)

const

Try to find the function at the given address.

find_variable() [1/2]

std::unique_ptr< Variable > LIEF::dwarf::CompilationUnit::find_variable

(

const std::string &

name

)

const

Try to find the Variable with the given name.

find_variable() [2/2]

std::unique_ptr< Variable > LIEF::dwarf::CompilationUnit::find_variable

(

uint64_t

addr

)

const

Try to find the Variable at the given address.

functions()

functions_it LIEF::dwarf::CompilationUnit::functions

(

)

const

Return an iterator over the functions implemented in this compilation unit.

Note that this iterator only iterates over the functions that have a concrete implementation in the compilation unit.

For instance with this code:

inline const char* get_secret_env() {
  return getenv("MY_SECRET_ENV");
}
 
int main() {
  printf("%s", get_secret_env());
  return 0;
}

The iterator will only return one function for main since get_secret_env is inlined and thus, its implementation is located in main.

high_address()

uint64_t LIEF::dwarf::CompilationUnit::high_address

(

)

const

Return the highest virtual address owned by this compilation unit.

imported_functions()

functions_it LIEF::dwarf::CompilationUnit::imported_functions

(

)

const

Return an iterator over the functions imported in this compilation unit but not implemented.

For instance with this code:

#include <cstdio>
int main() {
  printf("Hello\n");
  return 0;
}

printf is imported from the standard libc so the function is returned by the iterator. On the other hand, main() is implemented in this compilation unit so it is not returned by imported_function() but functions().

language()

Language LIEF::dwarf::CompilationUnit::language

(

)

const

Original Language of this compilation unit.

This value matches the DW_AT_language attribute.

low_address()

uint64_t LIEF::dwarf::CompilationUnit::low_address

(

)

const

Return the lowest virtual address owned by this compilation unit.

name()

std::string LIEF::dwarf::CompilationUnit::name

(

)

const

Name of the file associated with this compilation unit (e.g. test.cpp) Return an empty string if the name is not found or can't be resolved.

This value matches the DW_AT_name attribute

producer()

std::string LIEF::dwarf::CompilationUnit::producer

(

)

const

Information about the program (or library) that generated this compilation unit. For instance, it can output: Debian clang version 17.0.6.

It returns an empty string if the producer is not present or can't be resolved

This value matches the DW_AT_producer attribute

ranges()

std::vector< range_t > LIEF::dwarf::CompilationUnit::ranges

(

)

const

Return a list of address ranges owned by this compilation unit.

If the compilation unit owns a contiguous range, it should return a single range.

size()

uint64_t LIEF::dwarf::CompilationUnit::size

(

)

const

Return the size of the compilation unit according to its range of address.

If the compilation is fragmented (i.e. there are some address ranges between the lowest address and the highest that are not owned by the CU), then it returns the sum of all the address ranges owned by this CU.

If the compilation unit is not fragmented, then is basically returns high_address - low_address.

types()

types_it LIEF::dwarf::CompilationUnit::types

(

)

const

Return an iterator over the different types defined in this compilation unit.

variables()

vars_it LIEF::dwarf::CompilationUnit::variables

(

)

const

Return an iterator over all the variables defined in the this compilation unit:

static int A = 1; // Returned by the iterator
static const char* B = "Hello"; // Returned by the iterator
 
int get() {
  static int C = 2; // Returned by the iterator
  return C;
}

---

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

• DWARF/CompilationUnit.hpp