[PATCH 3/3] Add cygwin_internal() operation to retrieve the EXCEPTION_RECORD from a siginfo_t *

Jon TURNEY jon.turney@dronecode.org.uk
Wed Apr 1 13:20:00 GMT 2015


	* external.cc (cygwin_internal): Add operation to retrieve a copy
	of the EXCEPTION_RECORD from a siginfo_t *.
	* include/sys/cygwin.h (cygwin_getinfo_types): Ditto.
	* exception.h (cygwin_exception): Add exception_record accessor.

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
---
 winsup/cygwin/ChangeLog            |  7 +++++++
 winsup/cygwin/exception.h          |  1 +
 winsup/cygwin/external.cc          | 14 ++++++++++++++
 winsup/cygwin/include/sys/cygwin.h |  5 ++++-
 4 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index cff94f7..50f58e5 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,5 +1,12 @@
 2015-04-01  Jon TURNEY  <jon.turney@dronecode.org.uk>
 
+	* external.cc (cygwin_internal): Add operation to retrieve a copy
+	of the EXCEPTION_RECORD from a siginfo_t *.
+	* include/sys/cygwin.h (cygwin_getinfo_types): Ditto.
+	* exception.h (cygwin_exception): Add exception_record accessor.
+
+2015-04-01  Jon TURNEY  <jon.turney@dronecode.org.uk>
+
 	* include/sys/ucontext.h : New header.
 	* include/ucontext.h : Ditto.
 	* exceptions.cc (call_signal_handler): Provide ucontext_t
diff --git a/winsup/cygwin/exception.h b/winsup/cygwin/exception.h
index 3686bb0..0478daf 100644
--- a/winsup/cygwin/exception.h
+++ b/winsup/cygwin/exception.h
@@ -175,4 +175,5 @@ public:
     framep (in_framep), ctx (in_ctx), e (in_e), h (NULL) {}
   void dumpstack ();
   PCONTEXT context () const {return ctx;}
+  EXCEPTION_RECORD *exception_record () const {return e;}
 };
diff --git a/winsup/cygwin/external.cc b/winsup/cygwin/external.cc
index 5fac4bb..e379df1 100644
--- a/winsup/cygwin/external.cc
+++ b/winsup/cygwin/external.cc
@@ -27,6 +27,7 @@ details. */
 #include "environ.h"
 #include "cygserver_setpwd.h"
 #include "pwdgrp.h"
+#include "exception.h"
 #include <unistd.h>
 #include <stdlib.h>
 #include <wchar.h>
@@ -688,6 +689,19 @@ cygwin_internal (cygwin_getinfo_types t, ...)
 	res = 0;
 	break;
 
+      case CW_EXCEPTION_RECORD_FROM_SIGINFO_T:
+	{
+	  siginfo_t *si = va_arg(arg, siginfo_t *);
+	  EXCEPTION_RECORD *er = va_arg(arg, EXCEPTION_RECORD *);
+	  if (si && si->si_cyg && er)
+	    {
+	      memcpy(er, ((cygwin_exception *)si->si_cyg)->exception_record(),
+		     sizeof(EXCEPTION_RECORD));
+	      res = 0;
+	    }
+	}
+	break;
+
       default:
 	set_errno (ENOSYS);
     }
diff --git a/winsup/cygwin/include/sys/cygwin.h b/winsup/cygwin/include/sys/cygwin.h
index edfcc56..2ec6086 100644
--- a/winsup/cygwin/include/sys/cygwin.h
+++ b/winsup/cygwin/include/sys/cygwin.h
@@ -1,3 +1,4 @@
+
 /* sys/cygwin.h
 
    Copyright 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
@@ -153,7 +154,8 @@ typedef enum
     CW_CYGNAME_FROM_WINNAME,
     CW_FIXED_ATEXIT,
     CW_GETNSS_PWD_SRC,
-    CW_GETNSS_GRP_SRC
+    CW_GETNSS_GRP_SRC,
+    CW_EXCEPTION_RECORD_FROM_SIGINFO_T,
   } cygwin_getinfo_types;
 
 #define CW_LOCK_PINFO CW_LOCK_PINFO
@@ -214,6 +216,7 @@ typedef enum
 #define CW_FIXED_ATEXIT CW_FIXED_ATEXIT
 #define CW_GETNSS_PWD_SRC CW_GETNSS_PWD_SRC
 #define CW_GETNSS_GRP_SRC CW_GETNSS_GRP_SRC
+#define CW_EXCEPTION_RECORD_FROM_SIGINFO_T CW_EXCEPTION_RECORD_FROM_SIGINFO_T
 
 /* Token type for CW_SET_EXTERNAL_TOKEN */
 enum
-- 
2.1.4



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