* Makefile.in: Autogenerate some header files which provide magic numbers.

Force dependencies for files which depend on autogenerated headers to ensure
that they are always built.
* child_info.h (child_info): Add new fields to accommodate new magic number
header stuff.
* dcrt0.cc: Rely on "child_info_magic.h" to ensure that correct child_info
magic numbers are used.
(dll_crt0_1): Temporarily remove _cygwin_testing_magic test.
(_dll_crt0): Do more testing on magic numbers from fork_info structure.  Call
"multiple_cygwin_problem" where appropriate.
(multiple_cygwin_problem): Rename from multiple_cygwin_die.  Issue a warning or
die, as appropriate based on cygwin version/magic number mismatch.
* pinfo.cc (pinfo::exit): Don't attempt to dereference `this' if it doesn't
exist.  This can happen when a fatal error occurs early in process
initialization.
* shared.cc: Rely on "shared_info_magic.h" to accommodate that new magic number
header stuff.
(shared_info::initialize): Use new magic number stuff, for shared region.
(memory_init): Ditto, for mount table.
* shared_info.h: Accomodate new magic number stuff for shared region and mount
table.
* sigproc.cc: Rely on "child_info_magic.h" to accommodate new magic number
header stuff.
(init_child_info): Initialize new fields in child_info) to accomodate magic
numbers.
* winsup.h: Rename multiple_cygwin_die to multiple_cygwin_problem.
* include/cygwin/version.h: Define macros for manipulating version magic.
* cygmagic: New shell script for generating magic numbers.

1 files changed, 7 insertions, 10 deletions

diff --git a/winsup/cygwin/shared.cc b/winsup/cygwin/shared.cc
index ab748e5..db99b07 100644
--- a/winsup/cygwin/shared.cc
+++ b/winsup/cygwin/shared.cc
@@ -25,13 +25,10 @@ details. */
 #include "cygerrno.h"
 #include "cygheap.h"
 #include "heap.h"
-#include "shared_info.h"
+#include "shared_info_magic.h"
 #include "registry.h"
 #include "cygwin_version.h"
 
-#define SHAREDVER (unsigned)(cygwin_version.api_major << 16 | \
-		   cygwin_version.api_minor)
-
 shared_info NO_COPY *cygwin_shared = NULL;
 mount_info NO_COPY *mount_table = NULL;
 HANDLE cygwin_mount_h;
@@ -108,8 +105,8 @@ shared_info::initialize ()
 {
   if (inited)
     {
-      if (inited != SHAREDVER)
-	multiple_cygwin_die ();
+      if (inited != SHARED_VERSION_MAGIC)
+	multiple_cygwin_problem ("shared", inited, SHARED_VERSION);
       return;
     }
 
@@ -118,7 +115,7 @@ shared_info::initialize ()
 
   /* Initialize tty table.  */
   tty.init ();
-  inited = SHAREDVER;
+  inited = SHARED_VERSION_MAGIC;
 }
 
 void __stdcall
@@ -163,12 +160,12 @@ memory_init ()
   /* Initialize the Cygwin per-user mount table, if necessary */
   if (!mount_table->version)
     {
-      mount_table->version = MOUNT_VERSION;
+      mount_table->version = MOUNT_VERSION_MAGIC;
       debug_printf ("initializing mount table");
       mount_table->init ();	/* Initialize the mount table.  */
     }
-  else if (mount_table->version != MOUNT_VERSION)
-    multiple_cygwin_die ();
+  else if (mount_table->version != MOUNT_VERSION_MAGIC)
+    multiple_cygwin_problem ("mount", mount_table->version, MOUNT_VERSION);
 
 }