From: cgf <cgf>
Date: Wed, 14 Sep 2005 21:26:11 +0000 (+0000)
Subject: * cygtls.h (san): New structure.
X-Git-Tag: post_wait_sig_exit~92
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=7d5b174309e6e1dc2f2104d7549b6eb15446d069;p=pf3gnuchains%2Fpf3gnuchains4x.git

* cygtls.h (san): New structure.
(cygtls::andreas): New element.  Replaces _myfault and _myfault_errno.
(cygtls::fault_guarded): Use andreas.
(cygtls::return_from_fault): Ditto.
(cygtls::setup_fault): Add a parameter denoting where to store old fault
handler, if any and use it to "stack" faults.
(cygtls::reset_fault): Restore fault from parameter.
(myfault::sebastian): New variable.
(myfault::~myfault): Pass sebastian to reset_fault.
(myfault::myfault): Store old fault values in sebastian.
---

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index e4bc02826f..9fb967f33d 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,5 +1,18 @@
 2005-09-14  Christopher Faylor  <cgf@timesys.com>
 
+	* cygtls.h (san): New structure.
+	(cygtls::andreas): New element.  Replaces _myfault and _myfault_errno.
+	(cygtls::fault_guarded): Use andreas.
+	(cygtls::return_from_fault): Ditto.
+	(cygtls::setup_fault): Add a parameter denoting where to store old
+	fault handler, if any and use it to "stack" faults.
+	(cygtls::reset_fault): Restore fault from parameter.
+	(myfault::sebastian): New variable.
+	(myfault::~myfault): Pass sebastian to reset_fault.
+	(myfault::myfault): Store old fault values in sebastian.
+
+2005-09-14  Christopher Faylor  <cgf@timesys.com>
+
 	* heap.cc (heap_init): Revert 2005-09-11 patch as it seems to
 	inexplicably cause problems with emacs.
 
diff --git a/winsup/cygwin/cygtls.h b/winsup/cygwin/cygtls.h
index 65994ebfa8..33ffccb2f9 100644
--- a/winsup/cygwin/cygtls.h
+++ b/winsup/cygwin/cygtls.h
@@ -138,6 +138,12 @@ typedef struct struct_waitq
   HANDLE thread_ev;
 } waitq;
 
+typedef struct
+{
+  void *_myfault;
+  int _myfault_errno;
+} san;
+
 /* Changes to the below structure may require acompanying changes to the very
    simple parser in the perl script 'gentls_offsets' (<<-- start parsing here).
    The union in this structure is used to force alignment between the version
@@ -176,8 +182,7 @@ struct _cygtls
     };
   struct _local_storage locals;
   class cygthread *_ctinfo;
-  void *_myfault;
-  int _myfault_errno;
+  san andreas;
   waitq wq;
   struct _cygtls *prev, *next;
   __stack_t *stackptr;
@@ -220,25 +225,25 @@ struct _cygtls
   void lock () __attribute__ ((regparm (1)));
   void unlock () __attribute__ ((regparm (1)));
   bool locked () __attribute__ ((regparm (1)));
-  void*& fault_guarded () {return _myfault;}
+  void*& fault_guarded () {return andreas._myfault;}
   void return_from_fault ()
   {
-    if (_myfault_errno)
-      set_errno (_myfault_errno);
-    __ljfault ((int *) _myfault, 1);
+    if (andreas._myfault_errno)
+      set_errno (andreas._myfault_errno);
+    __ljfault ((int *) andreas._myfault, 1);
   }
-  int setup_fault (jmp_buf j, int myerrno) __attribute__ ((always_inline))
+  int setup_fault (jmp_buf j, san& old_j, int myerrno) __attribute__ ((always_inline))
   {
-    if (_myfault)
-      return 0;
-    _myfault = (void *) j;
-    _myfault_errno = myerrno;
+    old_j._myfault = andreas._myfault;
+    old_j._myfault_errno = andreas._myfault_errno;
+    andreas._myfault = (void *) j;
+    andreas._myfault_errno = myerrno;
     return __sjfault (j);
   }
-  void clear_fault (jmp_buf j) __attribute__ ((always_inline))
+  void reset_fault (san& old_j) __attribute__ ((always_inline))
   {
-    if (j == _myfault)
-      _myfault = NULL;
+    andreas._myfault = old_j._myfault;
+    andreas._myfault_errno = old_j._myfault_errno;
   }
   /*gentls_offsets*/
 };
@@ -254,11 +259,12 @@ extern _cygtls *_sig_tls;
 class myfault
 {
   jmp_buf buf;
+  san sebastian;
 public:
-  ~myfault () __attribute__ ((always_inline)) { _my_tls.clear_fault (buf); }
+  ~myfault () __attribute__ ((always_inline)) { _my_tls.reset_fault (sebastian); }
   inline int faulted (int myerrno = 0) __attribute__ ((always_inline))
   {
-    return _my_tls.setup_fault (buf, myerrno);
+    return _my_tls.setup_fault (buf, sebastian, myerrno);
   }
 };
 /*gentls_offsets*/
diff --git a/winsup/cygwin/net.cc b/winsup/cygwin/net.cc
index 910eeca361..3a96849326 100644
--- a/winsup/cygwin/net.cc
+++ b/winsup/cygwin/net.cc
@@ -938,7 +938,9 @@ cygwin_gethostbyname (const char *name)
   sig_dispatch_pending ();
   myfault efault;
   if (efault.faulted (EFAULT))
-    return NULL;
+{ console_printf ("OUCH!\n");
+      return NULL;
+}
 
   unsigned char tmp_addr[4];
   struct hostent tmp, *h;
@@ -969,7 +971,10 @@ cygwin_gethostbyname (const char *name)
 
   hostent *res = (hostent *) dup_ent (hostent_buf, h, t_hostent);
   if (res)
-    debug_printf ("h_name %s", res);
+{
+    debug_printf ("h_name %s", res->h_name);
+debug_printf ("HERE");
+}
   else
     {
       debug_printf ("dup_ent returned NULL for name %s, h %p", name, h);
diff --git a/winsup/cygwin/tlsoffsets.h b/winsup/cygwin/tlsoffsets.h
index fa79106bb1..824e02ca38 100644
--- a/winsup/cygwin/tlsoffsets.h
+++ b/winsup/cygwin/tlsoffsets.h
@@ -37,10 +37,8 @@
 //; $tls::plocals = 1264;
 //; $tls::_ctinfo = -1092;
 //; $tls::p_ctinfo = 2896;
-//; $tls::_myfault = -1088;
-//; $tls::p_myfault = 2900;
-//; $tls::_myfault_errno = -1084;
-//; $tls::p_myfault_errno = 2904;
+//; $tls::andreas = -1088;
+//; $tls::pandreas = 2900;
 //; $tls::wq = -1080;
 //; $tls::pwq = 2908;
 //; $tls::prev = -1052;
@@ -99,10 +97,8 @@
 #define tls_plocals (1264)
 #define tls__ctinfo (-1092)
 #define tls_p_ctinfo (2896)
-#define tls__myfault (-1088)
-#define tls_p_myfault (2900)
-#define tls__myfault_errno (-1084)
-#define tls_p_myfault_errno (2904)
+#define tls_andreas (-1088)
+#define tls_pandreas (2900)
 #define tls_wq (-1080)
 #define tls_pwq (2908)
 #define tls_prev (-1052)