require_relative 'helper' module Fiddle class TestHandle < TestCase include Fiddle def test_to_i handle = Fiddle::Handle.new(LIBC_SO) assert_kind_of Integer, handle.to_i end def test_static_sym_secure assert_raises(SecurityError) do Thread.new do $SAFE = 2 Fiddle::Handle.sym('calloc') end.join end end def test_static_sym_unknown assert_raises(DLError) { Fiddle::Handle.sym('fooo') } assert_raises(DLError) { Fiddle::Handle['fooo'] } end def test_static_sym skip "Fiddle::Handle.sym is not supported" if /mswin|mingw/ =~ RUBY_PLATFORM begin # Linux / Darwin / FreeBSD refute_nil Fiddle::Handle.sym('dlopen') assert_equal Fiddle::Handle.sym('dlopen'), Fiddle::Handle['dlopen'] rescue # NetBSD require 'objspace' refute_nil Fiddle::Handle.sym('Init_objspace') assert_equal Fiddle::Handle.sym('Init_objspace'), Fiddle::Handle['Init_objspace'] end end def test_sym_closed_handle handle = Fiddle::Handle.new(LIBC_SO) handle.close assert_raises(DLError) { handle.sym("calloc") } assert_raises(DLError) { handle["calloc"] } end def test_sym_unknown handle = Fiddle::Handle.new(LIBC_SO) assert_raises(DLError) { handle.sym('fooo') } assert_raises(DLError) { handle['fooo'] } end def test_sym_with_bad_args handle = Handle.new(LIBC_SO) assert_raises(TypeError) { handle.sym(nil) } assert_raises(TypeError) { handle[nil] } end def test_sym_secure assert_raises(SecurityError) do Thread.new do $SAFE = 2 handle = Handle.new(LIBC_SO) handle.sym('calloc') end.join end end def test_sym handle = Handle.new(LIBC_SO) refute_nil handle.sym('calloc') refute_nil handle['calloc'] end def test_handle_close handle = Handle.new(LIBC_SO) assert_equal 0, handle.close end def test_handle_close_twice handle = Handle.new(LIBC_SO) handle.close assert_raises(DLError) do handle.close end end def test_dlopen_returns_handle assert_instance_of Handle, dlopen(LIBC_SO) end def test_dlopen_safe assert_raises(SecurityError) do Thread.new do $SAFE = 2 dlopen(LIBC_SO) end.join end end def test_initialize_safe assert_raises(SecurityError) do Thread.new do $SAFE = 2 Handle.new(LIBC_SO) end.join end end def test_initialize_noargs handle = Handle.new refute_nil handle['rb_str_new'] end def test_initialize_flags handle = Handle.new(LIBC_SO, RTLD_LAZY | RTLD_GLOBAL) refute_nil handle['calloc'] end def test_enable_close handle = Handle.new(LIBC_SO) assert !handle.close_enabled?, 'close is enabled' handle.enable_close assert handle.close_enabled?, 'close is not enabled' end def test_disable_close handle = Handle.new(LIBC_SO) handle.enable_close assert handle.close_enabled?, 'close is enabled' handle.disable_close assert !handle.close_enabled?, 'close is enabled' end def test_NEXT begin # Linux / Darwin # # There are two special pseudo-handles, RTLD_DEFAULT and RTLD_NEXT. The former will find # the first occurrence of the desired symbol using the default library search order. The # latter will find the next occurrence of a function in the search order after the current # library. This allows one to provide a wrapper around a function in another shared # library. # --- Ubuntu Linux 8.04 dlsym(3) handle = Handle::NEXT refute_nil handle['malloc'] rescue # BSD # # If dlsym() is called with the special handle RTLD_NEXT, then the search # for the symbol is limited to the shared objects which were loaded after # the one issuing the call to dlsym(). Thus, if the function is called # from the main program, all the shared libraries are searched. If it is # called from a shared library, all subsequent shared libraries are # searched. RTLD_NEXT is useful for implementing wrappers around library # functions. For example, a wrapper function getpid() could access the # "real" getpid() with dlsym(RTLD_NEXT, "getpid"). (Actually, the dlfunc() # interface, below, should be used, since getpid() is a function and not a # data object.) # --- FreeBSD 8.0 dlsym(3) require 'objspace' handle = Handle::NEXT refute_nil handle['Init_objspace'] end end unless /mswin|mingw/ =~ RUBY_PLATFORM def test_DEFAULT skip "Handle::DEFAULT is not supported" if /mswin|mingw/ =~ RUBY_PLATFORM handle = Handle::DEFAULT refute_nil handle['malloc'] end unless /mswin|mingw/ =~ RUBY_PLATFORM def test_dlerror # FreeBSD (at least 7.2 to 7.2) calls nsdispatch(3) when it calls # getaddrinfo(3). And nsdispatch(3) doesn't call dlerror(3) even if # it calls _nss_cache_cycle_prevention_function with dlsym(3). # So our Fiddle::Handle#sym must call dlerror(3) before call dlsym. # In general uses of dlerror(3) should call it before use it. require 'socket' Socket.gethostbyname("localhost") Fiddle.dlopen("/usr/lib/libc.so").sym('strcpy') end if /freebsd/=~ RUBY_PLATFORM end end