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require_relative 'test_base'
module DL
class TestHandle < TestBase
def test_to_i
handle = DL::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
DL::Handle.sym('calloc')
end.join
end
end
def test_static_sym_unknown
assert_raises(DL::DLError) { DL::Handle.sym('fooo') }
assert_raises(DL::DLError) { DL::Handle['fooo'] }
end
def test_static_sym
skip "DL::Handle.sym is not supported" if /mswin|mingw/ =~ RUBY_PLATFORM
begin
# Linux / Darwin / FreeBSD
assert_not_nil DL::Handle.sym('dlopen')
assert_equal DL::Handle.sym('dlopen'), DL::Handle['dlopen']
rescue
# NetBSD
require 'objspace'
assert_not_nil DL::Handle.sym('Init_objspace')
assert_equal DL::Handle.sym('Init_objspace'), DL::Handle['Init_objspace']
end
end
def test_sym_closed_handle
handle = DL::Handle.new(LIBC_SO)
handle.close
assert_raises(DL::DLError) { handle.sym("calloc") }
assert_raises(DL::DLError) { handle["calloc"] }
end
def test_sym_unknown
handle = DL::Handle.new(LIBC_SO)
assert_raises(DL::DLError) { handle.sym('fooo') }
assert_raises(DL::DLError) { handle['fooo'] }
end
def test_sym_with_bad_args
handle = DL::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 = DL::Handle.new(LIBC_SO)
handle.sym('calloc')
end.join
end
end
def test_sym
handle = DL::Handle.new(LIBC_SO)
assert_not_nil handle.sym('calloc')
assert_not_nil handle['calloc']
end
def test_handle_close
handle = DL::Handle.new(LIBC_SO)
assert_equal 0, handle.close
end
def test_handle_close_twice
handle = DL::Handle.new(LIBC_SO)
handle.close
assert_raises(DL::DLError) do
handle.close
end
end
def test_dlopen_returns_handle
assert_instance_of DL::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
DL::Handle.new(LIBC_SO)
end.join
end
end
def test_initialize_noargs
handle = DL::Handle.new
assert_not_nil handle['rb_str_new']
end
def test_initialize_flags
handle = DL::Handle.new(LIBC_SO, DL::RTLD_LAZY | DL::RTLD_GLOBAL)
assert_not_nil handle['calloc']
end
def test_enable_close
handle = DL::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 = DL::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 = DL::Handle::NEXT
assert_not_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 = DL::Handle::NEXT
assert_not_nil handle['Init_objspace']
end
end unless /mswin|mingw/ =~ RUBY_PLATFORM
def test_DEFAULT
skip "DL::Handle::DEFAULT is not supported" if /mswin|mingw/ =~ RUBY_PLATFORM
handle = DL::Handle::DEFAULT
assert_not_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 DL::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")
DL.dlopen("/usr/lib/libc.so").sym('strcpy')
end if /freebsd/=~ RUBY_PLATFORM
end
end
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