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Reintegrate socket duplication via WSADuplicateSocket/WSASocket.

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* autoload.cc (WSADuplicateSocketW): Define.
	(WSASocketW): Define.
	* dtable.cc (dtable::release): Call dec_need_fixup_before if necessary.
	(dtable::fixup_before_fork): New function.
	(dtable::fixup_before_exec): New function.
	* dtable.h (class dtable): Add member cnt_need_fixup_before.  Add
	declarations for above new functions.
	(dtable::dec_need_fixup_before): New inline method.
	(dtable::inc_need_fixup_before): New inline method.
	(dtable::need_fixup_before): New inline method.
	* fhandler.h (fhandler_base::fixup_before_fork_exec): New virtual
	method.
	(fhandler_base::need_fixup_before): New virtual method.
	(class fhandler_socket): Add member prot_info_ptr.
	(fhandler_socket::init_fixup_before): Declare.
	(fhandler_socket::need_fixup_before): New inline method.
	(fhandler_socket::fixup_before_fork_exec): Declare.
	(fhandler_socket::fixup_after_exec): Declare.
	* fhandler_socket.cc (fhandler_socket::fhandler_socket): Initialize
	prot_info_ptr to NULL.
	(fhandler_socket::~fhandler_socket): Free prot_info_ptr conditionally.
	(fhandler_socket::init_fixup_before): New method.
	(fhandler_socket::fixup_before_fork_exec): Ditto.
	(fhandler_socket::fixup_after_fork): Use WSASocketW to duplicate
	socket if necessary.
	(fhandler_socket::fixup_after_exec): New method.
	(fhandler_socket::dup): Use fixup_before_fork_exec/fixup_after_fork
	to duplicate socket if necessary.
	* fork.cc (frok::parent): Start child suspended if some fhandler
	needs fixup before fork.  If so, call dtable::fixup_before_fork after
	CreateProcess and resume child.
	* net.cc (fdsock): Try to find out if socket needs fixup before and
	initialize socket accordingly.  Add HUGE comment to explain what happens
	and why.
	* spawn.cc (spawn_guts): Start child suspended if some fhandler needs
	fixup before exec.  If so, call dtable::fixup_before_exec after
	CreateProcess.
This commit is contained in:
Corinna Vinschen
2009-11-17 10:43:01 +00:00
parent 88242190ec
commit b14f53a8ec
9 changed files with 221 additions and 8 deletions
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12
winsup/cygwin/dtable.h
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@@ -31,14 +31,22 @@ class dtable
unsigned farchetype;
static const int initial_archetype_size = 8;
int first_fd_for_open;
int cnt_need_fixup_before;
void lock () {lock_process::locker.acquire ();}
void unlock () {lock_process::locker.release ();}
public:
size_t size;
dtable () : archetypes (NULL), narchetypes (0), farchetype (0), first_fd_for_open(3) {}
dtable () : archetypes (NULL), narchetypes (0), farchetype (0), first_fd_for_open(3), cnt_need_fixup_before(0) {}
void init () {first_fd_for_open = 3;}
void dec_need_fixup_before ()
{ if (cnt_need_fixup_before > 0) --cnt_need_fixup_before; }
void inc_need_fixup_before ()
{ cnt_need_fixup_before++; }
bool need_fixup_before ()
{ return cnt_need_fixup_before > 0; }
void move_fd (int, int);
int vfork_child_dup ();
void vfork_parent_restore ();
@@ -73,6 +81,8 @@ public:
fhandler_base *find_archetype (device& dev);
fhandler_base **add_archetype ();
void delete_archetype (fhandler_base *);
void fixup_before_exec (DWORD win_proc_id);
void fixup_before_fork (DWORD win_proc_id);
friend void dtable_init ();
friend void __stdcall close_all_files (bool);
friend class fhandler_disk_file;