Report GetLastError value when DebugActiveProcess fails

When DebugActiveProcess fails, the error message is fairly generic:

    error (_("Can't attach to process."));

It would be more useful for diagnosing problems if the Windows error
code was included in the message.  This patch implements this.

gdb/ChangeLog
2019-11-19  Tom Tromey  <tromey@adacore.com>

	* windows-nat.c (windows_nat_target::attach): Include GetLastError
	result in error when DebugActiveProcess fails.

Change-Id: Ie1bf502a0d96bb7c09bd5b1c5e0c924ba58cd68c

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 80ec8f352283ff2bc8698e36b97124ce509aec67..0305d67bd65975851f42d7e185a693549da37451 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2019-11-19  Tom Tromey  <tromey@adacore.com>
+
+       * windows-nat.c (windows_nat_target::attach): Include GetLastError
+       result in error when DebugActiveProcess fails.
+
 2019-11-18  Sergio Durigan Junior  <sergiodj@redhat.com>
            Pedro Alves  <palves@redhat.com>
 

diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index 5901f63b28a29341569054abee88db6fee4aa016..fdc21f38bfadd41b069eec60da283763bf7ca7f7 100644 (file)
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -1983,7 +1983,8 @@ windows_nat_target::attach (const char *args, int from_tty)
 #endif
 
   if (!ok)
-    error (_("Can't attach to process."));
+    error (_("Can't attach to process %u (error %u)"),
+          (unsigned) pid, (unsigned) GetLastError ());
 
   DebugSetProcessKillOnExit (FALSE);