* 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, 11 insertions, 8 deletions

diff --git a/winsup/cygwin/pinfo.cc b/winsup/cygwin/pinfo.cc
index ffd3d4ec6..43e3c5aae 100644
--- a/winsup/cygwin/pinfo.cc
+++ b/winsup/cygwin/pinfo.cc
@@ -117,14 +117,17 @@ pinfo_init (char **envp, int envc)
 void
 _pinfo::exit (UINT n, bool norecord)
 {
-  if (!norecord)
-    process_state = PID_EXITED;
-
-  /* FIXME:  There is a potential race between an execed process and its
-     parent here.  I hated to add a mutex just for this, though.  */
-  struct rusage r;
-  fill_rusage (&r, hMainProc);
-  add_rusage (&rusage_self, &r);
+  if (this)
+    {
+      if (!norecord)
+	process_state = PID_EXITED;
+
+      /* FIXME:  There is a potential race between an execed process and its
+	 parent here.  I hated to add a mutex just for this, though.  */
+      struct rusage r;
+      fill_rusage (&r, hMainProc);
+      add_rusage (&rusage_self, &r);
+    }
 
   sigproc_printf ("Calling ExitProcess %d", n);
   ExitProcess (n);