csdbg::plugin::plugin ( const i8 *  path, const i8 *  scope = NULL  )

explicit

Object constructor.

Parameters

[in]	path	the path of the module file
[in]	scope	the full scope of the callbacks (namespace and/or class)

Exceptions

std::bad_alloc
csdbg::exception

Note

If scope is NULL, the C ABI is used to resolve the symbols

Definition at line 44 of file plugin.cpp.

References csdbg::util::dbg_info(), likely, m_begin, m_end, m_handle, m_path, resolve(), and unlikely.

Referenced by clone().

   :
m_begin(NULL),
m_end(NULL),
m_path(NULL),
m_handle(NULL)
{
  if ( unlikely(path == NULL) )
    throw exception("invalid argument: path (=%p)", path);

  m_path = new i8[strlen(path) + 1];
  strcpy(m_path, path);

  /* Check if the module is already loaded */
  u32 flags = RTLD_LOCAL | RTLD_LAZY;
  m_handle = dlopen(m_path, flags | RTLD_NOLOAD);

  /* If the module is not yet loaded, load it explicitly */
  if ( likely(m_handle == NULL) ) {
    dlerror();
    m_handle = dlopen(m_path, flags);
    if ( unlikely(m_handle == NULL) )
      throw exception("failed to load plugin '%s' (%s)", m_path, dlerror());

    util::dbg_info("plugin '%s' loaded/linked", m_path);
  }
#if CSDBG_DBG_LEVEL & CSDBG_DBGL_INFO
  else
    util::dbg_info("plugin '%s' linked", m_path);
#endif

  /* Resolve the instrumentation functions */
  m_begin = resolve("mod_enter", scope);
  m_end = resolve("mod_exit", scope);
}

catch (...) {
  destroy();
}

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