gdb/gdb-6.8-quit-never-aborts.patch

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We may abort the process of detaching threads with multiple SIGINTs - which are
being sent during a testcase terminating its child GDB.
Some of the threads may not be properly PTRACE_DETACHed which hurts if they
should have been detached with SIGSTOP (as they are accidentally left running
on the debugger termination).
Index: gdb-7.5.50.20130118/gdb/defs.h
===================================================================
--- gdb-7.5.50.20130118.orig/gdb/defs.h 2013-01-01 07:32:41.000000000 +0100
+++ gdb-7.5.50.20130118/gdb/defs.h 2013-01-21 16:40:29.889256633 +0100
@@ -176,6 +176,7 @@ extern int check_quit_flag (void);
/* Set the quit flag. */
extern void set_quit_flag (void);
+extern int quit_flag_cleanup;
extern int immediate_quit;
extern void quit (void);
Index: gdb-7.5.50.20130118/gdb/top.c
===================================================================
--- gdb-7.5.50.20130118.orig/gdb/top.c 2013-01-21 14:56:12.000000000 +0100
+++ gdb-7.5.50.20130118/gdb/top.c 2013-01-21 14:56:16.385710056 +0100
@@ -1329,7 +1329,9 @@ quit_force (char *args, int from_tty)
qt.args = args;
qt.from_tty = from_tty;
- /* We want to handle any quit errors and exit regardless. */
+ /* We want to handle any quit errors and exit regardless but we should never
+ get user-interrupted to properly detach the inferior. */
+ quit_flag_cleanup = 1;
catch_errors (quit_target, &qt,
"Quitting: ", RETURN_MASK_ALL);
Index: gdb-7.5.50.20130118/gdb/utils.c
===================================================================
--- gdb-7.5.50.20130118.orig/gdb/utils.c 2013-01-21 14:56:12.000000000 +0100
+++ gdb-7.5.50.20130118/gdb/utils.c 2013-01-21 16:41:02.225233493 +0100
@@ -141,6 +141,11 @@ int quit_flag;
int immediate_quit;
+/* Nonzero means we are already processing the quitting cleanups and we should
+ no longer get aborted. */
+
+int quit_flag_cleanup;
+
#ifndef HAVE_PYTHON
/* Clear the quit flag. */
@@ -164,6 +169,9 @@ set_quit_flag (void)
int
check_quit_flag (void)
{
+ if (quit_flag_cleanup)
+ return 0;
+
/* This is written in a particular way to avoid races. */
if (quit_flag)
{
Index: gdb-7.5.50.20130118/gdb/python/python.c
===================================================================
--- gdb-7.5.50.20130118.orig/gdb/python/python.c 2013-01-21 16:39:03.000000000 +0100
+++ gdb-7.5.50.20130118/gdb/python/python.c 2013-01-21 16:39:30.698299142 +0100
@@ -181,6 +181,9 @@ set_quit_flag (void)
int
check_quit_flag (void)
{
+ if (quit_flag_cleanup)
+ return 0;
+
return PyOS_InterruptOccurred ();
}