Logging¶

This section details the API for interacting with LIEF’s logging engine.

LIEF uses spdlog for its logging mechanism, and this API provides an abstraction over that implementation.

API¶

C++¶

void LIEF::logging::disable()¶: Globally disable the logging module.

void LIEF::logging::enable()¶: Globally enable the logging module.

void LIEF::logging::set_level(LEVEL level)¶: Change the logging level (hierarchical).

void LIEF::logging::set_path(const std::string &path)¶: Change the logger as a file-base logging and set its path.

template<typename ...Args> void LIEF::logging::log(LEVEL level, const std::string &fmt, const Args&... args)¶

void LIEF::logging::log(LEVEL level, const std::string &fmt, const std::vector<std::string> &args)¶

void LIEF::logging::log(LEVEL level, const std::string &msg)¶: Log a message with the LIEF’s logger.

void LIEF::logging::reset()¶

enum class LIEF::logging::LEVEL : uint32_t¶

Hierarchical logging level

From a given level set, all levels below this ! level are enabled

For example, if LEVEL::INFO is enabled then LEVEL::WARN, LEVEL::ERR are also enabled

Values:

enumerator OFF = 0¶

enumerator TRACE¶

enumerator DEBUG¶

enumerator INFO¶

enumerator WARN¶

enumerator ERR¶

enumerator CRITICAL¶

class Scoped¶

Public Functions

Scoped(const Scoped&) = delete¶

Scoped &operator=(const Scoped&) = delete¶

Scoped(Scoped&&) = delete¶

Scoped &operator=(Scoped&&) = delete¶

inline explicit Scoped(LEVEL level)¶

inline explicit Scoped(LEVEL level, std::string name)¶

inline const Scoped &set_level(LEVEL lvl) const¶

inline void reset()¶

inline ~Scoped()¶

Example¶

#include <LIEF/logging.hpp>

// Set global level to ERROR
LIEF::logging::set_level(LIEF::logging::LEVEL::ERROR);

{
  // Temporarily set global level to DEBUG (RAII)
  LIEF::logging::Scoped _(LIEF::logging::LEVEL::DEBUG);
  LIEF::logging::log(LIEF::logging::LEVEL::DEBUG, "This is a debug message");
}

Python¶

lief.logging.set_level(level: lief.logging.LEVEL) → None¶: Change logging level

lief.logging.enable() → None¶: Enable the logger globally

lief.logging.disable() → None¶: Disable the logger globally

lief.logging.set_path(path: str | os.PathLike) → None¶: Change the logger as a file-base logging and set its path

lief.logging.log(level: lief.logging.LEVEL, msg: str) → None¶: Log a message with the LIEF’s logger

lief.logging.level_scope(name: str, lvl: LEVEL) → Scoped¶
lief.logging.level_scope(name: str, lvl: LEVEL) → Scoped

class lief.logging.Scoped¶: Bases: object

class lief.logging.LEVEL(*values)¶

Bases: Enum

CRITICAL = 6¶

DEBUG = 2¶

ERROR = 5¶

INFO = 3¶

OFF = 0¶

TRACE = 1¶

WARN = 4¶

Example¶

import lief

# Set global level to ERROR
lief.logging.set_level(lief.logging.LEVEL.ERROR)

# Temporarily set global level to DEBUG
with lief.logging.level_scope(lief.logging.LEVEL.DEBUG):
    lief.logging.log(lief.logging.LEVEL.DEBUG, "This is a debug message")