GNU gdb 6.1.1 [FreeBSD]
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This GDB was configured as "amd64-marcel-freebsd"...
(gdb) b getaddrinfo
Breakpoint 1 at 0x401fcc
(gdb) r
Starting program: /tmp/resolv 
Breakpoint 1 at 0x800c82607: file /usr/src/freebsd-head/lib/libc/net/getaddrinfo.c, line 370.
[New LWP 100173]
[New Thread 801007300 (LWP 100173)]
[Switching to Thread 801007300 (LWP 100173)]

Breakpoint 1, getaddrinfo (hostname=0x801015088 "127.0.0.1", servname=0x800955b98 "", hints=0x7fffffffe420, 
    res=0x7fffffffe478) at /usr/src/freebsd-head/lib/libc/net/getaddrinfo.c:370
370		int error = 0;
Current language:  auto; currently c
(gdb) bt
#0  getaddrinfo (hostname=0x801015088 "127.0.0.1", servname=0x800955b98 "", hints=0x7fffffffe420, res=0x7fffffffe478)
    at /usr/src/freebsd-head/lib/libc/net/getaddrinfo.c:370
#1  0x0000000000408dba in boost::asio::detail::socket_ops::getaddrinfo (host=0x801015088 "127.0.0.1", 
    service=0x800955b98 "", hints=0x7fffffffe420, result=0x7fffffffe478, ec=@0x7fffffffe590) at socket_ops.hpp:1809
#2  0x0000000000409797 in boost::asio::detail::resolver_service<boost::asio::ip::tcp>::resolve (this=0x801010320, 
    query=@0x7fffffffe530, ec=@0x7fffffffe590) at resolver_service.hpp:153
#3  0x00000000004098db in boost::asio::ip::resolver_service<boost::asio::ip::tcp>::resolve (this=0x801015040, 
    impl=@0x7fffffffe5a8, query=@0x7fffffffe530, ec=@0x7fffffffe590) at resolver_service.hpp:107
#4  0x000000000040992a in boost::asio::ip::basic_resolver<boost::asio::ip::tcp, boost::asio::ip::resolver_service<boost::asio::ip::tcp> >::resolve (this=0x7fffffffe5a0, q=@0x7fffffffe530, ec=@0x7fffffffe590) at basic_resolver.hpp:124
#5  0x00000000004028e2 in do_resolv (serv=0x409ba9 "") at resolv.cc:18
#6  0x00000000004029ce in main () at resolv.cc:24
(gdb) bt full
#0  getaddrinfo (hostname=0x801015088 "127.0.0.1", servname=0x800955b98 "", hints=0x7fffffffe420, res=0x7fffffffe478)
    at /usr/src/freebsd-head/lib/libc/net/getaddrinfo.c:370
	sentinel = {ai_flags = -6800, ai_family = 32767, ai_socktype = -7232, ai_protocol = 32767, ai_addrlen = 4294960752, 
  ai_canonname = 0x7fffffffe660 "", ai_addr = 0x0, ai_next = 0x80050f76d}
	cur = (struct addrinfo *) 0x202
	error = 8
	ai = {ai_flags = 1, ai_family = 0, ai_socktype = 5330025, ai_protocol = 8, ai_addrlen = 13116896, 
  ai_canonname = 0x800512c14 "H\211ØH\213l$\030H\213\\$\020L\213d$ L\213l$(L\213t$0H\203Ä8ÃH\211èH\003\203è", 
  ai_addr = 0x0, ai_next = 0x80053fa00}
	ai0 = {ai_flags = -7496, ai_family = 32767, ai_socktype = 5330025, ai_protocol = 8, ai_addrlen = 5503488, 
  ai_canonname = 0x80053f000 "z¸PÕ", ai_addr = 0x50f8c8, ai_next = 0x0}
	afai = (struct addrinfo *) 0x800756810
	pai = (struct addrinfo *) 0x7fffffffe420
	afd = (const struct afd *) 0x7fffffffe478
	ex = (const struct explore *) 0x800955b98
	afailist = {0x7fffffffe460, 0x0, 0x0}
	afai_unspec = (struct addrinfo *) 0x801015088
	found = 5500928
	numeric = 32767
#1  0x0000000000408dba in boost::asio::detail::socket_ops::getaddrinfo (host=0x801015088 "127.0.0.1", 
    service=0x800955b98 "", hints=0x7fffffffe420, result=0x7fffffffe478, ec=@0x7fffffffe590) at socket_ops.hpp:1809
	error = 8
#2  0x0000000000409797 in boost::asio::detail::resolver_service<boost::asio::ip::tcp>::resolve (this=0x801010320, 
    query=@0x7fffffffe530, ec=@0x7fffffffe590) at resolver_service.hpp:153
	address_info = (addrinfo_type *) 0x0
	host_name = {static npos = 18446744073709551615, 
  _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
    _M_p = 0x801015088 "127.0.0.1"}}
	service_name = {static npos = 18446744073709551615, 
  _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
    _M_p = 0x800955b98 ""}}
	hints = {ai_flags = 1024, ai_family = 0, ai_socktype = 1, ai_protocol = 6, ai_addrlen = 0, ai_canonname = 0x0, 
  ai_addr = 0x0, ai_next = 0x0}
	auto_address_info = {<boost::noncopyable_::noncopyable> = {<No data fields>}, ai_ = 0x1}
#3  0x00000000004098db in boost::asio::ip::resolver_service<boost::asio::ip::tcp>::resolve (this=0x801015040, 
    impl=@0x7fffffffe5a8, query=@0x7fffffffe530, ec=@0x7fffffffe590) at resolver_service.hpp:107
No locals.
#4  0x000000000040992a in boost::asio::ip::basic_resolver<boost::asio::ip::tcp, boost::asio::ip::resolver_service<boost::asio::ip::tcp> >::resolve (this=0x7fffffffe5a0, q=@0x7fffffffe530, ec=@0x7fffffffe590) at basic_resolver.hpp:124
No locals.
#5  0x00000000004028e2 in do_resolv (serv=0x409ba9 "") at resolv.cc:18
	io = {<boost::noncopyable_::noncopyable> = {<No data fields>}, service_registry_ = 0x801012040, 
  impl_ = @0x801013080}
	resolver = {<boost::asio::basic_io_object<boost::asio::ip::resolver_service<boost::asio::ip::tcp> >> = {<boost::noncopyable_::noncopyable> = {<No data fields>}, service = @0x801015040, implementation = {px = 0x0, pn = {
        pi_ = 0x801012080}}}, <No data fields>}
	q = {<boost::asio::ip::resolver_query_base> = {<No data fields>}, hints_ = {ai_flags = 1024, ai_family = 0, 
    ai_socktype = 1, ai_protocol = 6, ai_addrlen = 0, ai_canonname = 0x0, ai_addr = 0x0, ai_next = 0x0}, host_name_ = {
---Type <return> to continue, or q <return> to quit---
    static npos = 18446744073709551615, 
    _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
      _M_p = 0x801015088 "127.0.0.1"}}, service_name_ = {static npos = 18446744073709551615, 
    _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
      _M_p = 0x800955b98 ""}}}
	ec = {m_val = 0, m_cat = 0x800756810}
	iter = {<boost::iterator<std::forward_iterator_tag,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>,long int,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>*,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>&>> = {<boost::detail::iterator_base<std::forward_iterator_tag,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>,long int,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>*,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>&>> = {<std::iterator<std::forward_iterator_tag,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>,long int,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>*,const boost::asio::ip::basic_resolver_entry<boost::asio::ip::tcp>&>> = {<No data fields>}, <No data fields>}, <No data fields>}, values_ = {
    px = 0x0, pn = {pi_ = 0x402310}}, index_ = 2}
#6  0x00000000004029ce in main () at resolv.cc:24
No locals.