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|
# frozen_string_literal: false
begin
require_relative 'helper'
rescue LoadError
end
module Fiddle
class TestHandle < TestCase
include Fiddle
include Test::Unit::Assertions
def test_safe_handle_open
t = Thread.new do
$SAFE = 1
Fiddle::Handle.new(LIBC_SO.taint)
end
assert_raise(SecurityError) { t.value }
end
def test_safe_function_lookup
t = Thread.new do
h = Fiddle::Handle.new(LIBC_SO)
$SAFE = 1
h["qsort".taint]
end
assert_raise(SecurityError) { t.value }
end
def test_to_i
handle = Fiddle::Handle.new(LIBC_SO)
assert_kind_of Integer, handle.to_i
end
def test_static_sym_unknown
assert_raise(DLError) { Fiddle::Handle.sym('fooo') }
assert_raise(DLError) { Fiddle::Handle['fooo'] }
end
def test_static_sym
begin
# Linux / Darwin / FreeBSD
refute_nil Fiddle::Handle.sym('dlopen')
assert_equal Fiddle::Handle.sym('dlopen'), Fiddle::Handle['dlopen']
return
rescue
end
begin
# NetBSD
require '-test-/dln/empty'
refute_nil Fiddle::Handle.sym('Init_empty')
assert_equal Fiddle::Handle.sym('Init_empty'), Fiddle::Handle['Init_empty']
return
rescue
end
end unless /mswin|mingw/ =~ RUBY_PLATFORM
def test_sym_closed_handle
handle = Fiddle::Handle.new(LIBC_SO)
handle.close
assert_raise(DLError) { handle.sym("calloc") }
assert_raise(DLError) { handle["calloc"] }
end
def test_sym_unknown
handle = Fiddle::Handle.new(LIBC_SO)
assert_raise(DLError) { handle.sym('fooo') }
assert_raise(DLError) { handle['fooo'] }
end
def test_sym_with_bad_args
handle = Handle.new(LIBC_SO)
assert_raise(TypeError) { handle.sym(nil) }
assert_raise(TypeError) { handle[nil] }
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_raise(DLError) do
handle.close
end
end
def test_dlopen_returns_handle
assert_instance_of Handle, dlopen(LIBC_SO)
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']
return
rescue
end
begin
# 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 '-test-/dln/empty'
handle = Handle::NEXT
refute_nil handle['Init_empty']
return
rescue
end
end unless /mswin|mingw/ =~ RUBY_PLATFORM
def test_DEFAULT
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("/lib/libc.so.7").sym('strcpy')
end if /freebsd/=~ RUBY_PLATFORM
def test_no_memory_leak
assert_no_memory_leak(%w[-W0 -rfiddle.so], '', '100_000.times {Fiddle::Handle.allocate}; GC.start', rss: true)
end
if /cygwin|mingw|mswin/ =~ RUBY_PLATFORM
def test_fallback_to_ansi
k = Fiddle::Handle.new("kernel32.dll")
ansi = k["GetFileAttributesA"]
assert_equal(ansi, k["GetFileAttributes"], "should fallback to ANSI version")
end
end
end
end if defined?(Fiddle)
|
