* child_info.h (CURR_CHILD_INFO_MAGIC): Reset for previous changes.

* dcrt0.cc (get_cygwin_startup_info): Signal readiness when stracing since
strace::write_child relies on it.  Use strace.activate to notify strace
process, passing in arg indicating whether we're forked.
* sigproc.cc (wait_sig): Accommodate new strace::activate argument.
* spawn.cc (child_info_spawn::worker): Oops.  Previous suspended test was
actually correct.  Revert and document.
* strace.cc (strace::activate): Send additional flag indicating whether this is
an attempt to activate a forked process.
(strace::hello): Report on windows pid.
* include/sys/strace.h (strace::strace): Make a dummy.
(strace::activate): Modify declaration to accept an argument.
(strace::write_childpid): Set regparm.

winsup/cygwin/ChangeLog

@@ -1,3 +1,20 @@
+2011-11-23  Christopher Faylor  <me.cygwin2011@cgf.cx>
+
+	* child_info.h (CURR_CHILD_INFO_MAGIC): Reset for previous changes.
+
+	* dcrt0.cc (get_cygwin_startup_info): Signal readiness when stracing
+	since strace::write_child relies on it.  Use strace.activate to notify
+	strace process, passing in arg indicating whether we're forked.
+	* sigproc.cc (wait_sig): Accommodate new strace::activate argument.
+	* spawn.cc (child_info_spawn::worker): Oops.  Previous suspended test
+	was actually correct.  Revert and document.
+	* strace.cc (strace::activate): Send additional flag indicating whether
+	this is an attempt to activate a forked process.
+	(strace::hello): Report on windows pid.
+	* include/sys/strace.h (strace::strace): Make a dummy.
+	(strace::activate): Modify declaration to accept an argument.
+	(strace::write_childpid): Set regparm.
+
 2011-11-23  Christopher Faylor  <me.cygwin2011@cgf.cx>
 
 	* pipe.cc (fhandler_pipe::create): Avoid derefencing a NULL pointer.

winsup/cygwin/child_info.h

@@ -35,7 +35,7 @@ enum child_status
 #define EXEC_MAGIC_SIZE sizeof(child_info)
 
 /* Change this value if you get a message indicating that it is out-of-sync. */
-#define CURR_CHILD_INFO_MAGIC 0x24f4be4bU
+#define CURR_CHILD_INFO_MAGIC 0x76041b78U
 
 #define NPROCS	256
 

winsup/cygwin/dcrt0.cc

@@ -545,9 +545,10 @@ get_cygwin_startup_info ()
 	      multiple_cygwin_problem ("fhandler size", res->fhandler_union_cb, sizeof (fhandler_union));
 	    if (res->isstraced ())
 	      {
-		for (unsigned i = 0; !being_debugged () && i < 10000; i++)
+		res->ready (false);
+		for (unsigned i = 0; !being_debugged () && i < 1000000; i++)
 		  yield ();
-		strace.hello ();
+		strace.activate (res->type == _CH_FORK);
 	      }
 	    break;
 	  default:

winsup/cygwin/include/sys/strace.h

@@ -39,8 +39,8 @@ class strace
   void write (unsigned category, const char *buf, int count);
   unsigned char _active;
 public:
-  void activate ();
+  void activate (bool) __attribute__ ((regparm (2)));;
-  strace () {activate ();}
+  strace () {}
   int microseconds ();
   int version;
   int lmicrosec;
@@ -50,7 +50,7 @@ public:
   void prntf (unsigned, const char *func, const char *, ...) /*__attribute__ ((regparm(3)))*/;
   void vprntf (unsigned, const char *func, const char *, va_list ap) /*__attribute__ ((regparm(3)))*/;
   void wm (int message, int word, int lon) __attribute__ ((regparm(3)));
-  void write_childpid (child_info&, unsigned long) __attribute__ ((regparm (2)));
+  void write_childpid (child_info&, unsigned long) __attribute__ ((regparm (3)));
   bool attached () const {return _active == 3;}
   bool active () const {return _active & 1;}
   unsigned char& active_val () {return _active;}

winsup/cygwin/sigproc.cc

@@ -1295,7 +1295,7 @@ wait_sig (VOID *)
 	  talktome (&pack.si);
 	  break;
 	case __SIGSTRACE:
-	  strace.activate ();
+	  strace.activate (false);
 	  strace.hello ();
 	  break;
 	case __SIGPENDING:

winsup/cygwin/spawn.cc

@@ -692,7 +692,8 @@ loop:
       goto out;
     }
 
-  if (iscygwin ())
+  /* The CREATE_SUSPENDED case is handled below */
+  if (!(c_flags & CREATE_SUSPENDED))
     strace.write_childpid (*this, pi.dwProcessId);
 
   /* Fixup the parent data structures if needed and resume the child's

winsup/cygwin/strace.cc

@@ -32,12 +32,12 @@ class strace NO_COPY strace;
 #ifndef NOSTRACE
 
 void
-strace::activate ()
+strace::activate (bool isfork)
 {
   if (!dynamically_loaded && !_active && being_debugged ())
     {
       char buf[30];
-      __small_sprintf (buf, "cYg%8x %x", _STRACE_INTERFACE_ACTIVATE_ADDR, &_active);
+      __small_sprintf (buf, "cYg%8x %x %d", _STRACE_INTERFACE_ACTIVATE_ADDR, &_active, isfork);
       OutputDebugString (buf);
     }
 }
@@ -47,9 +47,10 @@ strace::hello ()
 {
   if (active ())
     {
-      char pidbuf[40];
+      char pidbuf[80];
       if (myself->progname[0])
-	__small_sprintf (pidbuf, "(pid %d, ppid %d)", myself->pid, myself->ppid ?: 1);
+	__small_sprintf (pidbuf, "(pid %d, ppid %d, windows pid %u)", myself->pid,
+			 myself->ppid ?: 1, GetCurrentProcessId ());
       else
 	{
 	  GetModuleFileNameW (NULL, myself->progname, sizeof (myself->progname));