From: Tom Tromey <tromey@adacore.com>
Date: Tue, 8 Nov 2022 19:14:20 +0000 (-0700)
Subject: Fix static initialization order problem in windows-nat.c
X-Git-Tag: gdb-13-branchpoint~380
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c83b95d88feed26eb04f7eca97c08e3ace0b7cbb;p=thirdparty%2Fbinutils-gdb.git

Fix static initialization order problem in windows-nat.c

This patch fixes a static initialization order problem in
windows-nat.c that was pointed out by Jon Turney.  The underlying
problem is that the windows_nat_target constructor relies on
serial_logfile already being constructed, but this is not enforced by
C++ rules.  This patch fixes the problem by initializing the global
windows_nat_target later.
---

diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index 6250cbc27a5..5d506507b6d 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -384,7 +384,9 @@ private:
   bool m_is_async = false;
 };
 
-static windows_nat_target the_windows_nat_target;
+/* This is a pointer and not a global specifically to avoid a C++
+   "static initializer fiasco" situation.  */
+static windows_nat_target *the_windows_nat_target;
 
 static void
 check (BOOL ok, const char *file, int line)
@@ -620,7 +622,7 @@ windows_nat_target::delete_thread (ptid_t ptid, DWORD exit_code,
 		target_pid_to_str (ptid).c_str (),
 		(unsigned) exit_code);
 
-  ::delete_thread (find_thread_ptid (&the_windows_nat_target, ptid));
+  ::delete_thread (find_thread_ptid (the_windows_nat_target, ptid));
 
   auto iter = std::find_if (windows_process.thread_list.begin (),
 			    windows_process.thread_list.end (),
@@ -3118,7 +3120,8 @@ _initialize_windows_nat ()
      calling x86_set_debug_register_length function
      in processor windows specific native file.  */
 
-  add_inf_child_target (&the_windows_nat_target);
+  the_windows_nat_target = new windows_nat_target;
+  add_inf_child_target (the_windows_nat_target);
 
 #ifdef __CYGWIN__
   cygwin_internal (CW_SET_DOS_FILE_WARNING, 0);