From e431827c7cab81292e8cd4ec9d3a4a60b35a42f2 Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Thu, 12 Feb 2004 03:01:58 +0000
Subject: [PATCH] Rename _threadinfo to _cygtls, throughout. * cygtls.h
 (_cygtls::call_signal_handler): Rename from call_signal_handler_now.
 (_cygtls::push): Make second argument mandatory. (_cygtls::fixup_after_fork):
 Declare new function. (_cygtls::lock): Ditto. * cygtls.cc
 (_cygtls::fixup_after_fork): Define new function. * dcrt0.cc
 (cygwin_finished_initializing): Define as bool. (alloc_stack): Use _tlstop
 rather than arbitrary variable in probably vain attempt to avoid strange fork
 problem on CTRL-C. (dll_crt0_0): Remove obsolete winpids::init call. *
 dll_init.cc (dll_dllcrt0): Detect forkee condition as equivalent to
 initializing. * winsup.h (cygwin_finished_initializing): Declare as bool. *
 exceptions.cc (handle_exceptions): Rely on cygwin_finished_initializing to
 determine how to handle exception during process startup.
 (_cygtls::call_signal_handler): Rename from call_signal_handler_now.
 (_cygtls::interrupt_now): Fill in second argument to push.
 (signal_fixup_after_fork): Eliminate. (setup_handler): Initialize locked to
 avoid potential inappropriate unlock. Resume thread if it has acquired the
 stack lock. (ctrl_c_handler): Just exit if ctrl-c is hit before cygiwn has
 finished initializing. * fork.cc (sync_with_child): Don't call abort since it
 can cause exit deadlocks. (sync_with_child): Change debugging output
 slightly. (fork_child): Set cygwin_finished_initializing here.  Call _cygtls
 fork fixup and explicitly call sigproc_init. (fork_parent): Release malloc
 lock on fork failure. (vfork): Call signal handler via _my_tls. * sigproc.cc
 (sig_send): Ditto. * syscalls.cc (readv): Ditto. * termios.cc (tcsetattr):
 Ditto. * wait.cc (wait4): Ditto. * signal.cc (nanosleep): Ditto. (abort):
 Ditto. (kill_pgrp): Avoid killing self if exiting. * sync.cc (muto::acquire):
 Remove (temporarily?) ill-advised exiting_thread check. * gendef (_sigfe): Be
 more agressive in protecting stack pointer from other access by signal
 thread. (_cygtls::locked): Define new function. (_sigbe): Ditto.
 (_cygtls::pop): Protect edx. (_cygtls::lock): Use guaranteed method to set
 eax to 1. (longjmp): Aggressively protect signal stack. * miscfuncs.cc
 (low_priority_sleep): Reduce "sleep time" for secs == 0. * pinfo.cc
 (winpids::set): Counterintuitively use malloc's lock to protect simultaneous
 access to the pids list since there are pathological conditions which can
 cause malloc to call winpid. (winpids::init): Eliminate. * pinfo.h
 (winpids::cs): Eliminate declaration. * pinfo.h (winpids::init): Eliminate
 definition.

---
 winsup/cygwin/ChangeLog     |  57 ++++++++++++++++
 winsup/cygwin/cygheap.h     |   2 +-
 winsup/cygwin/cygtls.cc     |  48 ++++++++-----
 winsup/cygwin/cygtls.h      |  17 +++--
 winsup/cygwin/dcrt0.cc      |  23 +++----
 winsup/cygwin/dll_init.cc   |   4 +-
 winsup/cygwin/exceptions.cc | 106 +++++++++++++----------------
 winsup/cygwin/fork.cc       |  50 ++++++++------
 winsup/cygwin/gendef        | 131 +++++++++++++++++++++---------------
 winsup/cygwin/init.cc       |   2 +-
 winsup/cygwin/miscfuncs.cc  |   2 +-
 winsup/cygwin/perthread.h   |   2 +-
 winsup/cygwin/pinfo.cc      |  13 +---
 winsup/cygwin/pinfo.h       |   2 -
 winsup/cygwin/signal.cc     |   6 +-
 winsup/cygwin/sigproc.cc    |   6 +-
 winsup/cygwin/sigproc.h     |   5 +-
 winsup/cygwin/sync.cc       |   4 +-
 winsup/cygwin/syscalls.cc   |   2 +-
 winsup/cygwin/termios.cc    |   3 +-
 winsup/cygwin/thread.h      |   4 +-
 winsup/cygwin/wait.cc       |   5 +-
 winsup/cygwin/winsup.h      |   2 +-
 23 files changed, 287 insertions(+), 209 deletions(-)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 852c1839f..2cc0cb88b 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,60 @@
+2004-02-11  Christopher Faylor  <cgf@redhat.com>
+
+	Rename _threadinfo to _cygtls, throughout.
+	* cygtls.h (_cygtls::call_signal_handler): Rename from
+	call_signal_handler_now.
+	(_cygtls::push): Make second argument mandatory.
+	(_cygtls::fixup_after_fork): Declare new function.
+	(_cygtls::lock): Ditto.
+	* cygtls.cc (_cygtls::fixup_after_fork): Define new function.
+	* dcrt0.cc (cygwin_finished_initializing): Define as bool.
+	(alloc_stack): Use _tlstop rather than arbitrary variable in probably
+	vain attempt to avoid strange fork problem on CTRL-C.
+	(dll_crt0_0): Remove obsolete winpids::init call.
+	* dll_init.cc (dll_dllcrt0): Detect forkee condition as equivalent to
+	initializing.
+	* winsup.h (cygwin_finished_initializing): Declare as bool.
+	* exceptions.cc (handle_exceptions): Rely on
+	cygwin_finished_initializing to determine how to handle exception
+	during process startup.
+	(_cygtls::call_signal_handler): Rename from call_signal_handler_now.
+	(_cygtls::interrupt_now): Fill in second argument to push.
+	(signal_fixup_after_fork): Eliminate.
+	(setup_handler): Initialize locked to avoid potential inappropriate
+	unlock.  Resume thread if it has acquired the stack lock.
+	(ctrl_c_handler): Just exit if ctrl-c is hit before cygiwn has finished
+	initializing.
+	* fork.cc (sync_with_child): Don't call abort since it can cause exit
+	deadlocks.
+	(sync_with_child): Change debugging output slightly.
+	(fork_child): Set cygwin_finished_initializing here.  Call _cygtls fork
+	fixup and explicitly call sigproc_init.
+	(fork_parent): Release malloc lock on fork failure.
+	(vfork): Call signal handler via _my_tls.
+	* sigproc.cc (sig_send): Ditto.
+	* syscalls.cc (readv): Ditto.
+	* termios.cc (tcsetattr): Ditto.
+	* wait.cc (wait4): Ditto.
+	* signal.cc (nanosleep): Ditto.
+	(abort): Ditto.
+	(kill_pgrp): Avoid killing self if exiting.
+	* sync.cc (muto::acquire): Remove (temporarily?) ill-advised
+	exiting_thread check.
+	* gendef (_sigfe): Be more agressive in protecting stack pointer from
+	other access by signal thread.
+	(_cygtls::locked): Define new function.
+	(_sigbe): Ditto.
+	(_cygtls::pop): Protect edx.
+	(_cygtls::lock): Use guaranteed method to set eax to 1.
+	(longjmp): Aggressively protect signal stack.
+	* miscfuncs.cc (low_priority_sleep): Reduce "sleep time" for secs == 0.
+	* pinfo.cc (winpids::set): Counterintuitively use malloc's lock to
+	protect simultaneous access to the pids list since there are
+	pathological conditions which can cause malloc to call winpid.
+	(winpids::init): Eliminate.
+	* pinfo.h (winpids::cs): Eliminate declaration.
+	* pinfo.h (winpids::init): Eliminate definition.
+
 2004-02-11  Corinna Vinschen  <corinna@vinschen.de>
 
 	* security.cc (get_nt_object_attribute): Fix error handling.
diff --git a/winsup/cygwin/cygheap.h b/winsup/cygwin/cygheap.h
index a5134cfde..518e9dce6 100644
--- a/winsup/cygwin/cygheap.h
+++ b/winsup/cygwin/cygheap.h
@@ -266,7 +266,7 @@ struct init_cygheap
 #ifdef NEWVFORK
   fhandler_tty_slave *ctty_on_hold;
 #endif
-  struct _threadinfo **threadlist;
+  struct _cygtls **threadlist;
   size_t sthreads;
   int open_fhs;
   void close_ctty ();
diff --git a/winsup/cygwin/cygtls.cc b/winsup/cygwin/cygtls.cc
index d3ed824c8..89e21d473 100644
--- a/winsup/cygwin/cygtls.cc
+++ b/winsup/cygwin/cygtls.cc
@@ -20,6 +20,7 @@ details. */
 #include "dtable.h"
 #include "cygheap.h"
 #include "cygthread.h"
+#include "pinfo.h"
 #include "sigproc.h"
 
 class sentry
@@ -32,7 +33,7 @@ public:
   sentry () {destroy = 0;}
   sentry (DWORD wait) {destroy = lock->acquire (wait);}
   ~sentry () {if (destroy) lock->release ();}
-  friend void _threadinfo::init ();
+  friend void _cygtls::init ();
 };
 
 muto NO_COPY *sentry::lock;
@@ -42,27 +43,27 @@ static size_t NO_COPY nthreads;
 #define THREADLIST_CHUNK 256
 
 void
-_threadinfo::init ()
+_cygtls::init ()
 {
   if (cygheap->threadlist)
     memset (cygheap->threadlist, 0, cygheap->sthreads * sizeof (cygheap->threadlist[0]));
   else
     {
       cygheap->sthreads = THREADLIST_CHUNK;
-      cygheap->threadlist = (_threadinfo **) ccalloc (HEAP_TLS, cygheap->sthreads,
+      cygheap->threadlist = (_cygtls **) ccalloc (HEAP_TLS, cygheap->sthreads,
 						     sizeof (cygheap->threadlist[0]));
     }
   new_muto1 (sentry::lock, sentry_lock);
 }
 
 void
-_threadinfo::set_state (bool is_exception)
+_cygtls::set_state (bool is_exception)
 {
   initialized = CYGTLS_INITIALIZED + is_exception;
 }
 
 void
-_threadinfo::reset_exception ()
+_cygtls::reset_exception ()
 {
   if (initialized == CYGTLS_EXCEPTION)
     {
@@ -75,14 +76,14 @@ _threadinfo::reset_exception ()
 
 /* Two calls to get the stack right... */
 void
-_threadinfo::call (DWORD (*func) (void *, void *), void *arg)
+_cygtls::call (DWORD (*func) (void *, void *), void *arg)
 {
   char buf[CYGTLS_PADSIZE];
   call2 (func, arg, buf);
 }
 
 void
-_threadinfo::call2 (DWORD (*func) (void *, void *), void *arg, void *buf)
+_cygtls::call2 (DWORD (*func) (void *, void *), void *arg, void *buf)
 {
   exception_list except_entry;
   /* Initialize this thread's ability to respond to things like
@@ -95,7 +96,7 @@ _threadinfo::call2 (DWORD (*func) (void *, void *), void *arg, void *buf)
 }
 
 void
-_threadinfo::init_thread (void *x, DWORD (*func) (void *, void *))
+_cygtls::init_thread (void *x, DWORD (*func) (void *, void *))
 {
   if (x)
     {
@@ -125,7 +126,7 @@ _threadinfo::init_thread (void *x, DWORD (*func) (void *, void *))
   sentry here (INFINITE);
   if (nthreads >= cygheap->sthreads)
     {
-      cygheap->threadlist = (_threadinfo **)
+      cygheap->threadlist = (_cygtls **)
 	crealloc (cygheap->threadlist, (cygheap->sthreads += THREADLIST_CHUNK)
 		 * sizeof (cygheap->threadlist[0]));
       memset (cygheap->threadlist + nthreads, 0, THREADLIST_CHUNK * sizeof (cygheap->threadlist[0]));
@@ -135,7 +136,22 @@ _threadinfo::init_thread (void *x, DWORD (*func) (void *, void *))
 }
 
 void
-_threadinfo::remove (DWORD wait)
+_cygtls::fixup_after_fork ()
+{
+  if (sig)
+    {
+      set_signal_mask (oldmask);
+      sig = 0;
+    }
+  stacklock = 0;
+  stackptr = stack + 1;	// FIXME?
+#ifdef DEBUGGING
+  memset (stackptr, 0, sizeof (stack) - sizeof (stack[0]));
+#endif
+}
+
+void
+_cygtls::remove (DWORD wait)
 {
   debug_printf ("wait %p\n", wait);
   sentry here (wait);
@@ -153,7 +169,7 @@ _threadinfo::remove (DWORD wait)
 }
 
 void
-_threadinfo::push (__stack_t addr, bool exception)
+_cygtls::push (__stack_t addr, bool exception)
 {
   if (exception)
     lock ();
@@ -166,13 +182,13 @@ _threadinfo::push (__stack_t addr, bool exception)
 #define BAD_IX ((size_t) -1)
 static size_t NO_COPY threadlist_ix = BAD_IX;
 
-_threadinfo *
-_threadinfo::find_tls (int sig)
+_cygtls *
+_cygtls::find_tls (int sig)
 {
   debug_printf ("sig %d\n", sig);
   sentry here (INFINITE);
   __asm__ volatile (".equ _threadlist_exception_return,.");
-  _threadinfo *res = NULL;
+  _cygtls *res = NULL;
   for (threadlist_ix = 0; threadlist_ix < nthreads; threadlist_ix++)
     if (sigismember (&(cygheap->threadlist[threadlist_ix]->sigwait_mask), sig))
       {
@@ -184,7 +200,7 @@ _threadinfo::find_tls (int sig)
 }
 
 void
-_threadinfo::set_siginfo (sigpacket *pack)
+_cygtls::set_siginfo (sigpacket *pack)
 {
   infodata = pack->si;
 }
@@ -222,7 +238,7 @@ handle_threadlist_exception (EXCEPTION_RECORD *e, void *frame, CONTEXT *, void *
 }
 
 void
-_threadinfo::init_threadlist_exceptions (exception_list *el)
+_cygtls::init_threadlist_exceptions (exception_list *el)
 {
   extern void init_exception_handler (exception_list *, exception_handler *);
   init_exception_handler (el, handle_threadlist_exception);
diff --git a/winsup/cygwin/cygtls.h b/winsup/cygwin/cygtls.h
index 43802dd81..78f61242b 100644
--- a/winsup/cygwin/cygtls.h
+++ b/winsup/cygwin/cygtls.h
@@ -90,7 +90,7 @@ struct _local_storage
    'gentls_offsets' (<<-- start parsing here).  */
 
 typedef __uint32_t __stack_t;
-struct _threadinfo
+struct _cygtls
 {
   void (*func) /*gentls_offsets*/(int)/*gentls_offsets*/;
   int saved_errno;
@@ -108,7 +108,7 @@ struct _threadinfo
   struct pthread *tid;
   struct _reent local_clib;
   struct _local_storage locals;
-  struct _threadinfo *prev, *next;
+  struct _cygtls *prev, *next;
   __stack_t *stackptr;
   int sig;
   unsigned stacklock;
@@ -121,9 +121,9 @@ struct _threadinfo
   void init_thread (void *, DWORD (*) (void *, void *));
   static void call (DWORD (*) (void *, void *), void *);
   static void call2 (DWORD (*) (void *, void *), void *, void *) __attribute__ ((regparm (3)));
-  static struct _threadinfo *find_tls (int sig);
+  static struct _cygtls *find_tls (int sig);
   void remove (DWORD);
-  void push (__stack_t, bool = false) __attribute__ ((regparm (3)));
+  void push (__stack_t, bool) __attribute__ ((regparm (3)));
   __stack_t pop () __attribute__ ((regparm (1)));
   bool isinitialized () {return initialized == CYGTLS_INITIALIZED || initialized == CYGTLS_EXCEPTION;}
   void set_state (bool);
@@ -138,16 +138,19 @@ struct _threadinfo
   void set_siginfo (struct sigpacket *) __attribute__ ((regparm (3)));
   void set_threadkill () {threadkill = true;}
   void reset_threadkill () {threadkill = false;}
-  int lock () __attribute__ ((regparm (1)));
+  int call_signal_handler () __attribute__ ((regparm (1)));
+  void fixup_after_fork () __attribute__ ((regparm (1)));
+  void lock () __attribute__ ((regparm (1)));
   void unlock () __attribute__ ((regparm (1)));
+  bool locked () __attribute__ ((regparm (1)));
   /*gentls_offsets*/
 };
 #pragma pack(pop)
 
 extern char *_tlsbase __asm__ ("%fs:4");
 extern char *_tlstop __asm__ ("%fs:8");
-#define _my_tls (((_threadinfo *) _tlsbase)[-1])
-extern _threadinfo *_main_tls;
+#define _my_tls (((_cygtls *) _tlsbase)[-1])
+extern _cygtls *_main_tls;
 
 #define __getreent() (&_my_tls.local_clib)
 
diff --git a/winsup/cygwin/dcrt0.cc b/winsup/cygwin/dcrt0.cc
index f1df888b2..374c901b4 100644
--- a/winsup/cygwin/dcrt0.cc
+++ b/winsup/cygwin/dcrt0.cc
@@ -72,9 +72,9 @@ char NO_COPY **envp;
 
 extern "C" void __sinit (_reent *);
 
-_threadinfo NO_COPY *_main_tls;
+_cygtls NO_COPY *_main_tls;
 
-int cygwin_finished_initializing;
+bool NO_COPY cygwin_finished_initializing;
 
 /* Used in SIGTOMASK for generating a bit for insertion into a sigset_t.
    This is subtracted from the signal number prior to shifting the bit.
@@ -513,18 +513,16 @@ alloc_stack_hard_way (child_info_fork *ci, volatile char *b)
 static void
 alloc_stack (child_info_fork *ci)
 {
-  /* FIXME: adding 16384 seems to avoid a stack copy problem during
-     fork on Win95, but I don't know exactly why yet. DJ */
-  volatile char b[ci->stacksize + 16384];
-
-  if (!VirtualQuery ((LPCVOID) &b, &sm, sizeof sm))
+  if (!VirtualQuery ((LPCVOID) _tlstop, &sm, sizeof sm))
     api_fatal ("fork: couldn't get stack info, %E");
 
   if (sm.AllocationBase == ci->stacktop)
-    ci->stacksize = 0;
-  else
-    alloc_stack_hard_way (ci, b + sizeof (b) - 1);
+    {
+      ci->stacksize = 0;
+      return;
+    }
 
+  alloc_stack_hard_way (ci, b + sizeof (b) - 1);
   return;
 }
 
@@ -662,7 +660,6 @@ dll_crt0_0 ()
     }
 
   device::init ();
-  winpids::init ();
   do_global_ctors (&__CTOR_LIST__, 1);
   cygthread::init ();
 
@@ -718,7 +715,7 @@ dll_crt0_0 ()
 	CloseHandle (child_proc_info->pppid_handle);
     }
 
-  _threadinfo::init ();
+  _cygtls::init ();
 
   /* Initialize events */
   events_init ();
@@ -873,7 +870,7 @@ dll_crt0_1 (char *)
       set_console_title (cp);
     }
 
-  cygwin_finished_initializing = 1;
+  cygwin_finished_initializing = true;
   /* Call init of loaded dlls. */
   dlls.init ();
 
diff --git a/winsup/cygwin/dll_init.cc b/winsup/cygwin/dll_init.cc
index 72048eff1..a1901a02d 100644
--- a/winsup/cygwin/dll_init.cc
+++ b/winsup/cygwin/dll_init.cc
@@ -371,7 +371,7 @@ dll_dllcrt0 (HMODULE h, per_process *p)
      initializing, then the DLL must be a cygwin-aware DLL
      that was explicitly linked into the program rather than
      a dlopened DLL. */
-  if (!cygwin_finished_initializing)
+  if (!in_forkee && !cygwin_finished_initializing)
     type = DLL_LINK;
   else
     {
@@ -387,7 +387,7 @@ dll_dllcrt0 (HMODULE h, per_process *p)
      initialize the DLL.  If we haven't finished initializing,
      it may not be safe to call the dll's "main" since not
      all of cygwin's internal structures may have been set up. */
-  if (!d || (cygwin_finished_initializing && !d->init ()))
+  if (!d || ((in_forkee || cygwin_finished_initializing) && !d->init ()))
     return -1;
 
   return (DWORD) d;
diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
index 03df67f10..490756544 100644
--- a/winsup/cygwin/exceptions.cc
+++ b/winsup/cygwin/exceptions.cc
@@ -519,7 +519,7 @@ handle_exceptions (EXCEPTION_RECORD *e0, void *frame, CONTEXT *in0, void *)
 	break;
       }
 
-  if (!myself->progname[0]
+  if (!cygwin_finished_initializing
       || GetCurrentThreadId () == sigtid
       || (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_DFL
       || (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_IGN
@@ -692,10 +692,10 @@ interruptible (DWORD pc)
   return res;
 }
 void __stdcall
-_threadinfo::interrupt_setup (int sig, void *handler,
+_cygtls::interrupt_setup (int sig, void *handler,
 			      struct sigaction& siga)
 {
-  push ((__stack_t) sigdelayed);
+  push ((__stack_t) sigdelayed, false);
   oldmask = myself->getsigmask ();
   newmask = oldmask | siga.sa_mask | SIGTOMASK (sig);
   sa_flags = siga.sa_flags;
@@ -717,28 +717,16 @@ _threadinfo::interrupt_setup (int sig, void *handler,
 }
 
 bool
-_threadinfo::interrupt_now (CONTEXT *ctx, int sig, void *handler,
+_cygtls::interrupt_now (CONTEXT *ctx, int sig, void *handler,
 			    struct sigaction& siga)
 {
-  push ((__stack_t) ctx->Eip);
+  push ((__stack_t) ctx->Eip, false);
   interrupt_setup (sig, handler, siga);
   ctx->Eip = pop ();
   SetThreadContext (*this, ctx); /* Restart the thread in a new location */
   return 1;
 }
 
-void __stdcall
-signal_fixup_after_fork ()
-{
-  if (_my_tls.sig)
-    {
-      _my_tls.sig = 0;
-      _my_tls.stackptr = _my_tls.stack + 1;	// FIXME?
-      set_signal_mask (_my_tls.oldmask);
-    }
-  sigproc_init ();
-}
-
 extern "C" void __stdcall
 set_sig_errno (int e)
 {
@@ -747,13 +735,14 @@ set_sig_errno (int e)
   // sigproc_printf ("errno %d", e);
 }
 
-static int setup_handler (int, void *, struct sigaction&, _threadinfo *tls)
+static int setup_handler (int, void *, struct sigaction&, _cygtls *tls)
   __attribute__((regparm(3)));
 static int
-setup_handler (int sig, void *handler, struct sigaction& siga, _threadinfo *tls)
+setup_handler (int sig, void *handler, struct sigaction& siga, _cygtls *tls)
 {
   CONTEXT cx;
   bool interrupted = false;
+  bool locked = false;
 
   if (tls->sig)
     {
@@ -762,12 +751,11 @@ setup_handler (int sig, void *handler, struct sigaction& siga, _threadinfo *tls)
       goto out;
     }
 
-  int locked;
   for (int i = 0; i < CALL_HANDLER_RETRY; i++)
     {
-      locked = tls->lock ();
-      __stack_t *retaddr_on_stack = tls->stackptr - 1;
-      if (retaddr_on_stack >= tls->stack)
+      tls->lock ();
+      locked = true;
+      if (tls->stackptr > tls->stack)
 	{
 	  tls->reset_exception ();
 	  tls->interrupt_setup (sig, handler, siga);
@@ -776,14 +764,14 @@ setup_handler (int sig, void *handler, struct sigaction& siga, _threadinfo *tls)
 	  break;
 	}
 
+      tls->unlock ();
+      locked = false;
       DWORD res;
       HANDLE hth = (HANDLE) *tls;
 
-      /* Suspend the thread which will receive the signal.  But first ensure that
-	 this thread doesn't have any mutos.  (FIXME: Someday we should just grab
-	 all of the mutos rather than checking for them)
-	 For Windows 95, we also have to ensure that the addresses returned by GetThreadContext
-	 are valid.
+      /* Suspend the thread which will receive the signal.
+	 For Windows 95, we also have to ensure that the addresses returned by
+	 GetThreadContext are valid.
 	 If one of these conditions is not true we loop for a fixed number of times
 	 since we don't want to stall the signal handler.  FIXME: Will this result in
 	 noticeable delays?
@@ -799,31 +787,25 @@ setup_handler (int sig, void *handler, struct sigaction& siga, _threadinfo *tls)
       sigproc_printf ("suspending mainthread PC %p", cx.Eip);
 #endif
       res = SuspendThread (hth);
-      /* Just release the lock now since we hav suspended the main thread and it
-	 definitely can't be grabbing it now.  This will have to change, of course,
-	 if/when we can send signals to other than the main thread. */
-
       /* Just set pending if thread is already suspended */
       if (res)
 	{
 	  (void) ResumeThread (hth);
 	  break;
 	}
-
-      // FIXME - add check for reentering of DLL here
-
-      cx.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
-      if (!GetThreadContext (hth, &cx))
-	system_printf ("couldn't get context of main thread, %E");
-      else if (interruptible (cx.Eip))
-	interrupted = tls->interrupt_now (&cx, sig, handler, siga);
+      if (!tls->locked ())
+	{
+	  cx.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
+	  if (!GetThreadContext (hth, &cx))
+	    system_printf ("couldn't get context of main thread, %E");
+	  else if (interruptible (cx.Eip))
+	    interrupted = tls->interrupt_now (&cx, sig, handler, siga);
+	}
 
       res = ResumeThread (hth);
       if (interrupted)
 	break;
 
-      tls->unlock ();
-      locked = false;
       sigproc_printf ("couldn't interrupt.  trying again.");
       low_priority_sleep (0);
     }
@@ -845,6 +827,10 @@ static BOOL WINAPI
 ctrl_c_handler (DWORD type)
 {
   static bool saw_close;
+
+  if (!cygwin_finished_initializing)
+    ExitProcess (STATUS_CONTROL_C_EXIT);
+
   _my_tls.remove (INFINITE);
 
   /* Return FALSE to prevent an "End task" dialog box from appearing
@@ -977,7 +963,7 @@ sigpacket::process ()
     /* nothing to do */;
   else if (tls && sigismember (&tls->sigwait_mask, si.si_signo))
     insigwait_mask = true;
-  else if (!tls && (tls = _threadinfo::find_tls (si.si_signo)))
+  else if (!tls && (tls = _cygtls::find_tls (si.si_signo)))
     insigwait_mask = true;
   else if (!(masked = sigismember (mask, si.si_signo)) && tls)
     masked  = sigismember (&tls->sigmask, si.si_signo);
@@ -1153,36 +1139,36 @@ events_terminate (void)
   exit_already = 1;
 }
 
-extern "C" {
-int __stdcall
-call_signal_handler_now ()
+int
+_cygtls::call_signal_handler ()
 {
-  int sa_flags = 0;
-  while (_my_tls.sig && _my_tls.stackptr > _my_tls.stack)
+  int this_sa_flags = 0;
+  /* Call signal handler.  No need to set stacklock since sig effectively
+     implies that.  */
+  while (sig)
     {
-      sa_flags = _my_tls.sa_flags;
-      int sig = _my_tls.sig;
-      void (*sigfunc) (int) = _my_tls.func;
+      this_sa_flags = sa_flags;
+      int thissig = sig;
+      void (*sigfunc) (int) = func;
 
-      (void) _my_tls.pop ();
+      (void) pop ();
       reset_signal_arrived ();
-      sigset_t oldmask = _my_tls.oldmask;
-      int this_errno = _my_tls.saved_errno;
-      set_process_mask (_my_tls.newmask);
-      _my_tls.sig = 0;
-      sigfunc (sig);
+      sigset_t oldmask = oldmask;
+      int this_errno = saved_errno;
+      set_process_mask (newmask);
+      sig = 0;
+      sigfunc (thissig);
       set_process_mask (oldmask);
       if (this_errno >= 0)
 	set_errno (this_errno);
     }
 
-  return sa_flags & SA_RESTART;
+  return this_sa_flags & SA_RESTART;
 }
 
-void __stdcall
+extern "C" void __stdcall
 reset_signal_arrived ()
 {
   (void) ResetEvent (signal_arrived);
   sigproc_printf ("reset signal_arrived");
 }
-}
diff --git a/winsup/cygwin/fork.cc b/winsup/cygwin/fork.cc
index 8a5e5bfa0..01b9dbc23 100644
--- a/winsup/cygwin/fork.cc
+++ b/winsup/cygwin/fork.cc
@@ -167,11 +167,11 @@ sync_with_child (PROCESS_INFORMATION &pi, HANDLE subproc_ready,
        */
       if (errcode != STATUS_CONTROL_C_EXIT)
 	{
-	    system_printf ("child %u(%p) died before initialization with status code %p",
-			  cygwin_pid (pi.dwProcessId), pi.hProcess, errcode);
-	    system_printf ("*** child state %s", s);
+	  system_printf ("child %u(%p) died before initialization with status code %p",
+			 cygwin_pid (pi.dwProcessId), pi.hProcess, errcode);
+	  system_printf ("*** child state %s", s);
 #ifdef DEBUGGING
-	    abort ();
+	  try_to_debug ();
 #endif
 	}
       set_errno (EAGAIN);
@@ -212,13 +212,13 @@ sync_with_parent (const char *s, bool hang_self)
       switch (psync_rc)
 	{
 	case WAIT_TIMEOUT:
-	  api_fatal ("WFSO timed out for %s", s);
+	  api_fatal ("WFSO timed out %s", s);
 	  break;
 	case WAIT_FAILED:
 	  if (GetLastError () == ERROR_INVALID_HANDLE &&
 	      WaitForSingleObject (fork_info->forker_finished, 1) != WAIT_FAILED)
 	    break;
-	  api_fatal ("WFSO failed for %s, fork_finished %p, %E", s,
+	  api_fatal ("WFSO failed %s, fork_finished %p, %E", s,
 		     fork_info->forker_finished);
 	  break;
 	default:
@@ -243,6 +243,17 @@ fork_child (HANDLE& hParent, dll *&first_dll, bool& load_dlls)
   sigproc_printf ("hParent %p, child 1 first_dll %p, load_dlls %d", hParent,
 		  first_dll, load_dlls);
 
+  /* If we've played with the stack, stacksize != 0.  That means that
+     fork() was invoked from other than the main thread.  Make sure that
+     the threadinfo information is properly set up.  */
+  if (!fork_info->stacksize)
+    {
+      _main_tls = &_my_tls;
+      _main_tls->init_thread (NULL, NULL);
+      _main_tls->local_clib = *_impure_ptr;
+      _impure_ptr = &_main_tls->local_clib;
+    }
+
 #ifdef DEBUGGING
   char c;
   if (GetEnvironmentVariable ("FORKDEBUG", &c, 1))
@@ -257,18 +268,6 @@ fork_child (HANDLE& hParent, dll *&first_dll, bool& load_dlls)
     }
 #endif
 
-  /* If we've played with the stack, stacksize != 0.  That means that
-     fork() was invoked from other than the main thread.  Make sure that
-     when the "main" thread exits it calls do_exit, like a normal process.
-     Exit with a status code of 0. */
-  if (fork_info->stacksize)
-    {
-      _main_tls = &_my_tls;
-      _main_tls->init_thread (NULL, NULL);
-      _main_tls->local_clib = *_impure_ptr;
-      _impure_ptr = &_main_tls->local_clib;
-    }
-
   set_file_api_mode (current_codepage);
 
   MALLOC_CHECK;
@@ -307,7 +306,8 @@ fork_child (HANDLE& hParent, dll *&first_dll, bool& load_dlls)
 #endif
 
   pinfo_fixup_after_fork ();
-  signal_fixup_after_fork ();
+  _my_tls.fixup_after_fork ();
+  sigproc_init ();
 
   /* Set thread local stuff to zero.  Under Windows 95/98 this is sometimes
      non-zero, for some reason.
@@ -320,6 +320,7 @@ fork_child (HANDLE& hParent, dll *&first_dll, bool& load_dlls)
   fixup_timers_after_fork ();
   wait_for_sigthread ();
   cygbench ("fork-child");
+  cygwin_finished_initializing = true;
   return 0;
 }
 
@@ -458,7 +459,7 @@ fork_parent (HANDLE& hParent, dll *&first_dll,
 
   syscall_printf ("CreateProcess (%s, %s, 0, 0, 1, %x, 0, 0, %p, %p)",
 		  myself->progname, myself->progname, c_flags, &si, &pi);
-  __malloc_lock ();
+  bool locked = __malloc_lock ();
   void *newheap;
   newheap = cygheap_setup_for_child (&ch, cygheap->fdtab.need_fixup_before ());
   rc = CreateProcess (myself->progname, /* image to run */
@@ -483,6 +484,7 @@ fork_parent (HANDLE& hParent, dll *&first_dll,
       /* Restore impersonation */
       cygheap->user.reimpersonate ();
       cygheap_setup_for_child_cleanup (newheap, &ch, 0);
+      __malloc_unlock ();
       return -1;
     }
 
@@ -573,6 +575,7 @@ fork_parent (HANDLE& hParent, dll *&first_dll,
 		  dll_bss_start, dll_bss_end, impure_beg, impure_end, NULL);
 
   __malloc_unlock ();
+  locked = false;
   MALLOC_CHECK;
   if (!rc)
     goto cleanup;
@@ -622,6 +625,9 @@ fork_parent (HANDLE& hParent, dll *&first_dll,
 
 /* Common cleanup code for failure cases */
  cleanup:
+  if (locked)
+    __malloc_unlock ();
+
   /* Remember to de-allocate the fd table. */
   if (pi.hProcess)
     ForceCloseHandle1 (pi.hProcess, childhProc);
@@ -725,7 +731,7 @@ vfork ()
       debug_printf ("cygheap->ctty_on_hold %p, cygheap->open_fhs %d", cygheap->ctty_on_hold, cygheap->open_fhs);
       int res = cygheap->fdtab.vfork_child_dup () ? 0 : -1;
       debug_printf ("%d = vfork()", res);
-      call_signal_handler_now ();	// FIXME: racy
+      _my_tls.call_signal_handler ();	// FIXME: racy
       vf->tls = _my_tls;
       return res;
     }
@@ -757,7 +763,7 @@ vfork ()
   debug_printf ("exiting vfork, pid %d", pid);
   sig_dispatch_pending ();
 
-  call_signal_handler_now (); // FIXME: racy
+  _my_tls.call_signal_handler ();	// FIXME: racy
   _my_tls = vf->tls;
   return pid;
 #endif
diff --git a/winsup/cygwin/gendef b/winsup/cygwin/gendef
index b391d501e..72afbc1c9 100755
--- a/winsup/cygwin/gendef
+++ b/winsup/cygwin/gendef
@@ -91,86 +91,99 @@ EOF
 
 	.stabs	"_sigfe:F(0,1)",36,0,0,__sigbe
 __sigfe:
+	pushl	%ebx
 	pushl	%edx
-	movl	%fs:4,%edx
-1:	movl	\$1,%eax
-	lock	xchgl %eax,$tls::stacklock(%edx)
-	cmpl	%eax,%eax
-	jz	2f
-	xorl	%eax,%eax
-	call	_low_priority_sleep
-	jmp	1b
-2:	movl	\$4,%eax
-	xadd	%eax,$tls::stackptr(%edx)
-	decl	$tls::stacklock(%edx)
-	leal	__sigbe,%edx
-	xchgl	%edx,8(%esp)
-	movl	%edx,(%eax)
-	popl	%edx
+1:	movl	%fs:4,%edx				# location of bottom of stack
+	movl	\$1,%eax				# potential lock value
+	lock	xchgl %eax,$tls::stacklock(%edx)	# see if we can grab it
+	orl	%eax,%eax				# it will be zero
+	jz	2f					#  if so
+	xorl	%eax,%eax				# nope.  It was not zero
+	call	_low_priority_sleep			# should be a short-time thing, so
+	jmp	1b					# sleep and loop
+2:	movl	\$4,%eax				# have the lock, now increment the
+	xadd	%eax,$tls::stackptr(%edx)		#  stack pointer and get pointer
+	leal	__sigbe,%ebx				# new place to return to
+	xchgl	%ebx,12(%esp)				# exchange with real return value
+	movl	%ebx,(%eax)				# store real return value on alt stack
+	decl	$tls::stacklock(%edx)			# remove lock
+	popl	%edx					# restore saved value
+	popl	%ebx
 	ret
 
 	.global	__sigbe
 	.stabs	"_sigbe:F(0,1)",36,0,0,__sigbe
 __sigbe:
-	pushl	%edx
-	pushl	%eax
-	movl	%fs:4,%edx
-1:	movl	\$1,%eax
-	lock	xchgl %eax,$tls::stacklock(%edx)
-	cmpl	%eax,%eax
-	jz	2f
-	xorl	%eax,%eax
-	call	_low_priority_sleep
-	jmp	1b
-2:	movl	\$-4,%eax
-	xadd	%eax,$tls::stackptr(%edx)
-	decl	$tls::stacklock(%edx)
-	xchgl	%edx,-4(%eax)
-	xchgl	%edx,4(%esp)
+	pushl	%ebx
+	pushl	%edx					# return here after cygwin syscall
+	pushl	%eax					# don't clobber
+1:	movl	%fs:4,%edx				# address of bottom of tls
+	movl	\$1,%eax				# potential lock value
+	lock	xchgl %eax,$tls::stacklock(%edx)	# see if we can grab it
+	orl	%eax,%eax				# it will be zero
+	jz	2f					#  if so
+	xorl	%eax,%eax				# nope.  not zero
+	call	_low_priority_sleep			# sleep
+	jmp	1b					#  and loop
+2:	movl	\$-4,%eax				# now decrement aux stack
+	xadd	%eax,$tls::stackptr(%edx)		#  and get pointer
+#	xorl	%ebx,%ebx
+	movl	\$0x41774177,%ebx
+	xchgl	%ebx,-4(%eax)				# 
+	xchgl	%ebx,8(%esp)
+	decl	$tls::stacklock(%edx)			# release lock
 	popl	%eax
+	popl	%edx
 	ret
 
-	.global	__ZN11_threadinfo3popEv
-__ZN11_threadinfo3popEv:
+	.global	__ZN7_cygtls3popEv
+__ZN7_cygtls3popEv:
 1:	pushl	%ebx
+	pushl	%edx				# FIXME: needed?
 	movl	%eax,%edx
 	movl	\$-4,%ebx
 	xadd	%ebx,$tls::pstackptr(%edx)
-	xorl	%eax,%eax
+#	xorl	%eax,%eax
+	movl	8(%esp),%eax
 	xchgl	%eax,-4(%ebx)
+	popl	%edx				# FIXME: needed?
 	popl	%ebx
 	ret
 
-	.global	__ZN11_threadinfo4lockEv
-__ZN11_threadinfo4lockEv:
-	pushl	%ebx
-	movl	%eax,%ebx
+	.global	__ZN7_cygtls4lockEv
+__ZN7_cygtls4lockEv:
+	pushl	%edi
+	movl	%eax,%edi
 1:	movl	\$1,%eax
-	lock	xchgl %eax,$tls::pstacklock(%ebx)
-	cmpl	%eax,%eax
+	lock	xchgl %eax,$tls::pstacklock(%edi)
+	orl	%eax,%eax
 	jz	2f
 	xorl	%eax,%eax
 	call	_low_priority_sleep
 	jmp	1b
-2:	xorl	\$1,%eax
-	popl	%ebx
+2:	popl	%edi
 	ret
 
-	.global	__ZN11_threadinfo6unlockEv
-__ZN11_threadinfo6unlockEv:
+	.global	__ZN7_cygtls6unlockEv
+__ZN7_cygtls6unlockEv:
 	decl	$tls::pstacklock(%eax)
 	ret
 
+	.global	__ZN7_cygtls6lockedEv
+__ZN7_cygtls6lockedEv:
+	movl	$tls::pstacklock(%eax),%eax
+	ret
+
 	.global	_sigreturn
 	.stabs	"sigreturn:F(0,1)",36,0,0,_sigreturn
 _sigreturn:
-	addl	\$4,%esp			# Remove argument
+	addl	\$4,%esp		# Remove argument
 	call	_set_process_mask\@4
 
 	movl	%fs:4,%ebx
 
-	cmpl	\$0,$tls::sig(%ebx)	# Did a signal come in?
-	jnz	3f			# Yes, if non-zero
+#	cmpl	\$0,$tls::sig(%ebx)	# Did a signal come in?
+#	jnz	3f			# Yes, if non-zero
 
 1:	popl	%edx			# saved errno
 	testl	%edx,%edx		# Is it < 0
@@ -215,8 +228,7 @@ _sigdelayed:
 	movl	\$0,$tls::sig(%ebx)	# zero the signal number as a
 					# flag to the signal handler thread
 					# that it is ok to set up sigsave
-4:	popl	%ebx
-	jmp	*%ebx
+4:	ret
 
 EOF
     }
@@ -229,15 +241,26 @@ sub longjmp {
 	.globl	_longjmp
 
 _longjmp:
+1:	movl	%fs:4,%edx
+	movl	\$1,%eax
+	lock	xchgl %eax,$tls::stacklock(%edx)
+	orl	%eax,%eax
+	jz	2f
+	xorl	%eax,%eax
+	call	_low_priority_sleep
+	jmp	1b
+2:	leal	($tls::stack)(%edx),%eax
+	movl	%eax,($tls::stackptr)(%edx)
+
 	pushl	%ebp
 	movl	%esp,%ebp
 	movl	8(%ebp),%edi
 	movl	12(%ebp),%eax
 	testl	%eax,%eax
-	jne	0f
+	jne	3f
 	incl	%eax
-0:
-	movl	%eax,0(%edi)
+
+3:	movl	%eax,0(%edi)
 	movl	24(%edi),%ebp
 	pushfl
 	popl	%ebx
@@ -250,14 +273,12 @@ _longjmp:
 	movw	%ax,%es
 	movw	40(%edi),%ax
 	movw	%ax,%gs
-	movl	%fs:4,%eax
-	leal	($tls::stack)(%eax),%edx
-	movl	%edx,($tls::stackptr)(%eax)
 	movl	0(%edi),%eax
 	movl	4(%edi),%ebx
 	movl	8(%edi),%ecx
-	movl	12(%edi),%edx
 	movl	16(%edi),%esi
+	decl	$tls::stacklock(%edx)
+	movl	12(%edi),%edx
 	movl	20(%edi),%edi
 	popfl
 	ret
diff --git a/winsup/cygwin/init.cc b/winsup/cygwin/init.cc
index 7ad38f11b..8bbc89bfb 100644
--- a/winsup/cygwin/init.cc
+++ b/winsup/cygwin/init.cc
@@ -27,7 +27,7 @@ HANDLE sync_startup;
 static void WINAPI
 threadfunc_fe (VOID *arg)
 {
-  _threadinfo::call ((DWORD (*)  (void *, void *)) (((char **) _tlsbase)[OLDFUNC_OFFSET]), arg);
+  _cygtls::call ((DWORD (*)  (void *, void *)) (((char **) _tlsbase)[OLDFUNC_OFFSET]), arg);
 }
 
 static DWORD WINAPI
diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc
index 37ef3a49c..4207c4d1a 100644
--- a/winsup/cygwin/miscfuncs.cc
+++ b/winsup/cygwin/miscfuncs.cc
@@ -318,7 +318,7 @@ low_priority_sleep (DWORD secs)
 
   if (!secs && wincap.has_switch_to_thread ())
     {
-      for (int i = 0; i < 10; i++)
+      for (int i = 0; i < 3; i++)
 	SwitchToThread ();
     }
   else
diff --git a/winsup/cygwin/perthread.h b/winsup/cygwin/perthread.h
index c721cefea..429b7cac9 100644
--- a/winsup/cygwin/perthread.h
+++ b/winsup/cygwin/perthread.h
@@ -58,7 +58,7 @@ class vfork_save
  public:
   int pid;
   DWORD frame[100];
-  _threadinfo tls;
+  _cygtls tls;
   char **vfork_ebp;
   char **vfork_esp;
   int ctty;
diff --git a/winsup/cygwin/pinfo.cc b/winsup/cygwin/pinfo.cc
index e3723f863..a9a0b80e7 100644
--- a/winsup/cygwin/pinfo.cc
+++ b/winsup/cygwin/pinfo.cc
@@ -30,6 +30,7 @@ details. */
 #include "shared_info.h"
 #include "cygheap.h"
 #include "fhandler.h"
+#include "cygmalloc.h"
 
 static char NO_COPY pinfo_dummy[sizeof (_pinfo)] = {0};
 
@@ -755,22 +756,14 @@ winpids::enum9x (bool winpid)
   return nelem;
 }
 
-NO_COPY CRITICAL_SECTION winpids::cs;
-
 void
 winpids::set (bool winpid)
 {
-  EnterCriticalSection (&cs);
+  __malloc_lock ();
   npids = (this->*enum_processes) (winpid);
   if (pidlist)
     pidlist[npids] = 0;
-  LeaveCriticalSection (&cs);
-}
-
-void
-winpids::init ()
-{
-  InitializeCriticalSection (&cs);
+  __malloc_unlock ();
 }
 
 DWORD
diff --git a/winsup/cygwin/pinfo.h b/winsup/cygwin/pinfo.h
index b0ddb6702..923b0bec7 100644
--- a/winsup/cygwin/pinfo.h
+++ b/winsup/cygwin/pinfo.h
@@ -179,7 +179,6 @@ class winpids
   DWORD enumNT (bool winpid);
   DWORD enum9x (bool winpid);
   void add (DWORD& nelem, bool, DWORD pid);
-  static CRITICAL_SECTION cs;
 public:
   DWORD npids;
   inline void reset () { npids = 0; release (); }
@@ -196,7 +195,6 @@ public:
   inline _pinfo *operator [] (int i) const {return (_pinfo *) pinfolist[i];}
   ~winpids ();
   void release ();
-  static void init ();
 };
 
 extern __inline pid_t
diff --git a/winsup/cygwin/signal.cc b/winsup/cygwin/signal.cc
index 54232bb45..b0ac94a79 100644
--- a/winsup/cygwin/signal.cc
+++ b/winsup/cygwin/signal.cc
@@ -93,7 +93,7 @@ nanosleep (const struct timespec *rqtp, struct timespec *rmtp)
     rem = 0;
   if (rc == WAIT_OBJECT_0)
     {
-      (void) call_signal_handler_now ();
+      (void) _my_tls.call_signal_handler ();
       set_errno (EINTR);
       res = -1;
     }
@@ -302,7 +302,7 @@ kill_pgrp (pid_t pid, siginfo_t& si)
       found++;
     }
 
-  if (killself && kill_worker (myself->pid, si))
+  if (killself && !exit_state && kill_worker (myself->pid, si))
     res = -1;
 
   if (!found)
@@ -341,7 +341,7 @@ abort (void)
   set_signal_mask (sig_mask);
 
   raise (SIGABRT);
-  (void) call_signal_handler_now (); /* Call any signal handler */
+  (void) _my_tls.call_signal_handler (); /* Call any signal handler */
   do_exit (1);	/* signal handler didn't exit.  Goodbye. */
 }
 
diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc
index caa22a5a9..c013e0d20 100644
--- a/winsup/cygwin/sigproc.cc
+++ b/winsup/cygwin/sigproc.cc
@@ -668,7 +668,7 @@ sig_send (_pinfo *p, int sig)
    If sending to this process, wait for notification that a signal has
    completed before returning.  */
 int __stdcall
-sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
+sig_send (_pinfo *p, siginfo_t& si, _cygtls *tls)
 {
   int rc = 1;
   bool its_me;
@@ -747,7 +747,7 @@ sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
   if (!pack.si.si_uid)
     pack.si.si_uid = myself->uid;
   pack.pid = myself->pid;
-  pack.tls = (_threadinfo *) tls;
+  pack.tls = (_cygtls *) tls;
   if (wait_for_completion)
     {
       pack.wakeup = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL);
@@ -816,7 +816,7 @@ sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
     }
 
   if (wait_for_completion && si.si_signo != __SIGFLUSHFAST)
-    call_signal_handler_now ();
+    _my_tls.call_signal_handler ();
 
 out:
   if (pack.wakeup)
diff --git a/winsup/cygwin/sigproc.h b/winsup/cygwin/sigproc.h
index e9c762112..1176c919c 100644
--- a/winsup/cygwin/sigproc.h
+++ b/winsup/cygwin/sigproc.h
@@ -54,7 +54,7 @@ struct sigpacket
 {
   siginfo_t si;
   pid_t pid;
-  class _threadinfo *tls;
+  class _cygtls *tls;
   sigset_t *mask;
   union
   {
@@ -91,9 +91,8 @@ void __stdcall subproc_init ();
 void __stdcall sigproc_terminate ();
 bool __stdcall proc_exists (_pinfo *) __attribute__ ((regparm(1)));
 bool __stdcall pid_exists (pid_t) __attribute__ ((regparm(1)));
-int __stdcall sig_send (_pinfo *, siginfo_t&, class _threadinfo *tls = NULL) __attribute__ ((regparm (3)));
+int __stdcall sig_send (_pinfo *, siginfo_t&, class _cygtls *tls = NULL) __attribute__ ((regparm (3)));
 int __stdcall sig_send (_pinfo *, int) __attribute__ ((regparm (2)));
-void __stdcall signal_fixup_after_fork ();
 void __stdcall signal_fixup_after_exec ();
 void __stdcall wait_for_sigthread ();
 void __stdcall sigalloc ();
diff --git a/winsup/cygwin/sync.cc b/winsup/cygwin/sync.cc
index 2116ed0a8..f65e5a8e1 100644
--- a/winsup/cygwin/sync.cc
+++ b/winsup/cygwin/sync.cc
@@ -69,8 +69,10 @@ int
 muto::acquire (DWORD ms)
 {
   DWORD this_tid = GetCurrentThreadId ();
+#if 0
   if (exiting_thread)
     return this_tid == exiting_thread;
+#endif
 
   if (tid != this_tid)
     {
@@ -113,8 +115,6 @@ int
 muto::release ()
 {
   DWORD this_tid = GetCurrentThreadId ();
-  if (exiting_thread)
-    return this_tid == exiting_thread;
 
   if (tid != this_tid || !visits)
     {
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 790fcb82b..ccf5848ca 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -461,7 +461,7 @@ readv (int fd, const struct iovec *const iov, const int iovcnt)
 	}
 
     out:
-      if (res >= 0 || get_errno () != EINTR || !call_signal_handler_now ())
+      if (res >= 0 || get_errno () != EINTR || !_my_tls.call_signal_handler ())
 	break;
       set_errno (e);
     }
diff --git a/winsup/cygwin/termios.cc b/winsup/cygwin/termios.cc
index e046984b6..c33054af5 100644
--- a/winsup/cygwin/termios.cc
+++ b/winsup/cygwin/termios.cc
@@ -23,6 +23,7 @@ details. */
 #include "cygwin/version.h"
 #include "perprocess.h"
 #include "sigproc.h"
+#include "cygtls.h"
 #include <sys/termios.h>
 
 /* tcsendbreak: POSIX 7.2.2.1 */
@@ -146,7 +147,7 @@ tcsetattr (int fd, int a, const struct termios *t)
 	  e = get_errno ();
 	  break;
 	case bg_signalled:
-	  if (call_signal_handler_now ())
+	  if (_my_tls.call_signal_handler ())
 	    continue;
 	  res = -1;
 	  /* fall through intentionally */
diff --git a/winsup/cygwin/thread.h b/winsup/cygwin/thread.h
index 361981777..7d68b5f5f 100644
--- a/winsup/cygwin/thread.h
+++ b/winsup/cygwin/thread.h
@@ -348,7 +348,7 @@ private:
 
 #define WAIT_CANCELED   (WAIT_OBJECT_0 + 1)
 
-class _threadinfo;
+class _cygtls;
 class pthread: public verifyable_object
 {
 public:
@@ -360,7 +360,7 @@ public:
   bool valid;
   bool suspended;
   int cancelstate, canceltype;
-  _threadinfo *cygtls;
+  _cygtls *cygtls;
   HANDLE cancel_event;
   pthread_t joiner;
 
diff --git a/winsup/cygwin/wait.cc b/winsup/cygwin/wait.cc
index 8e5800b63..d92a32911 100644
--- a/winsup/cygwin/wait.cc
+++ b/winsup/cygwin/wait.cc
@@ -15,6 +15,7 @@ details. */
 #include "sigproc.h"
 #include "perthread.h"
 #include "thread.h"
+#include "cygtls.h"
 
 /* This is called _wait and not wait because the real wait is defined
    in libc/syscalls/syswait.c.  It calls us.  */
@@ -99,7 +100,7 @@ wait4 (int intpid, int *status, int options, struct rusage *r)
       if (w->status == -1)
 	{
 	  set_sig_errno (EINTR);
-	  call_signal_handler_now ();
+	  _my_tls.call_signal_handler ();
 	  sawsig = true;
 	  res = -1;
 	}
@@ -114,7 +115,7 @@ wait4 (int intpid, int *status, int options, struct rusage *r)
 	*status = w->status;
 
     done:
-      if (!sawsig || !call_signal_handler_now ())
+      if (!sawsig || !_my_tls.call_signal_handler ())
 	break;
     }
 
diff --git a/winsup/cygwin/winsup.h b/winsup/cygwin/winsup.h
index 9301e92b1..d8930f9c6 100644
--- a/winsup/cygwin/winsup.h
+++ b/winsup/cygwin/winsup.h
@@ -239,7 +239,7 @@ extern "C" int try_to_debug (bool waitloop = 1);
 
 void set_file_api_mode (codepage_type);
 
-extern int cygwin_finished_initializing;
+extern bool cygwin_finished_initializing;
 
 /**************************** Miscellaneous ******************************/