From a12cc160ab21c29ef00ab4e2377e01ae85b9de35 Mon Sep 17 00:00:00 2001
From: Daniel Jacobowitz <drow@false.org>
Date: Tue, 20 Jan 2009 15:33:14 +0000
Subject: [PATCH] 	PR gdb/9346 	* infcmd.c (signal_command): Do not
 specify a resume PC.

	testsuite/
	PR gdb/9346
	* gdb.base/interrupt.c (sigint_handler): New.
	(main): Install a SIGINT handler if SIGNALS is defined.  Exit
	on error.
	* gdb.base/interrupt.exp: Define SIGNALS unless gdb,nosignals.
	Test "signal SIGINT".
---
 gdb/ChangeLog                        |  5 ++++
 gdb/infcmd.c                         |  6 +----
 gdb/testsuite/ChangeLog              |  9 +++++++
 gdb/testsuite/gdb.base/interrupt.c   | 18 ++++++++++++-
 gdb/testsuite/gdb.base/interrupt.exp | 38 ++++++++++++++++++++++++++--
 5 files changed, 68 insertions(+), 8 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 03c1159def..a474390340 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2008-01-20  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	PR gdb/9346
+	* infcmd.c (signal_command): Do not specify a resume PC.
+
 2009-01-19  Doug Evans  <dje@google.com>
 
 	* dummy-frame.c (dummy_frame): Replace regcache member with
diff --git a/gdb/infcmd.c b/gdb/infcmd.c
index 2cd583cdb8..3696f79b76 100644
--- a/gdb/infcmd.c
+++ b/gdb/infcmd.c
@@ -1145,11 +1145,7 @@ signal_command (char *signum_exp, int from_tty)
     }
 
   clear_proceed_status ();
-  /* "signal 0" should not get stuck if we are stopped at a breakpoint.
-     FIXME: Neither should "signal foo" but when I tried passing
-     (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
-     tried to track down yet.  */
-  proceed (oursig == TARGET_SIGNAL_0 ? (CORE_ADDR) -1 : stop_pc, oursig, 0);
+  proceed ((CORE_ADDR) -1, oursig, 0);
 }
 
 /* Proceed until we reach a different source line with pc greater than
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 052c500dc6..2eb1ee078f 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2009-01-20  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	PR gdb/9346
+	* gdb.base/interrupt.c (sigint_handler): New.
+	(main): Install a SIGINT handler if SIGNALS is defined.  Exit
+	on error.
+	* gdb.base/interrupt.exp: Define SIGNALS unless gdb,nosignals.
+	Test "signal SIGINT".
+
 2009-01-19  Doug Evans  <dje@google.com>
 
 	* gdb.base/break.exp: Update expected gdb output.
diff --git a/gdb/testsuite/gdb.base/interrupt.c b/gdb/testsuite/gdb.base/interrupt.c
index a895d4b7d8..80b906099e 100644
--- a/gdb/testsuite/gdb.base/interrupt.c
+++ b/gdb/testsuite/gdb.base/interrupt.c
@@ -2,6 +2,16 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
+
+#ifdef SIGNALS
+#include <signal.h>
+
+static void
+sigint_handler (int signo)
+{
+}
+#endif
+
 int
 main ()
 {
@@ -10,6 +20,9 @@ main ()
 #ifdef usestubs
   set_debug_traps();
   breakpoint();
+#endif
+#ifdef SIGNALS
+  signal (SIGINT, sigint_handler);
 #endif
   printf ("talk to me baby\n");
   while (1)
@@ -20,7 +33,10 @@ main ()
 #ifdef EINTR
 	  if (errno != EINTR)
 #endif
-	    perror ("");
+	    {
+	      perror ("");
+	      return 1;
+	    }
 	}
       else if (nbytes == 0)
 	{
diff --git a/gdb/testsuite/gdb.base/interrupt.exp b/gdb/testsuite/gdb.base/interrupt.exp
index 037902b721..beee0cf6b0 100644
--- a/gdb/testsuite/gdb.base/interrupt.exp
+++ b/gdb/testsuite/gdb.base/interrupt.exp
@@ -34,7 +34,13 @@ set bug_id 0
 set testfile interrupt
 set srcfile ${testfile}.c
 set binfile ${objdir}/${subdir}/${testfile}
-if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
+
+set options { debug }
+if { ! [target_info exists gdb,nosignals] } {
+    lappend options "additional_flags=-DSIGNALS"
+}
+
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $options] != "" } {
      untested interrupt.exp
      return -1
 }
@@ -165,7 +171,35 @@ if ![file exists $binfile] then {
 	    eof { fail "echo data (eof)" }
 	}
 
-	setup_xfail "i*86-pc-linux*-gnu*"
+ 	if { ! [target_info exists gdb,nosignals] } {
+	    # Wait until the program is in the read system call again.
+	    sleep 2
+
+	    # Stop the program for another test.
+	    set msg "Send Control-C, second time"
+	    send_gdb "\003"
+	    gdb_test_multiple "" "$msg" {
+		-re "Program received signal SIGINT.*$gdb_prompt $" {
+		    pass "$msg"
+		}
+	    }
+
+	    # The "signal" command should deliver the correct signal and
+	    # return to the loop.
+	    set msg "signal SIGINT"
+	    gdb_test_multiple "signal SIGINT" "$msg" {
+		-re "^signal SIGINT\r\nContinuing with signal SIGINT.\r\n(\r\n|)$" { pass "$msg" }
+	    }
+
+	    # We should be back in the loop.
+	    send_gdb "more data\n"
+	    gdb_expect {
+		-re "^(\r\n|)more data\r\n(|more data\r\n)$" { pass "echo more data" }
+		timeout { fail "echo more data (timeout)" }
+		eof { fail "echo more data (eof)" }
+	    }
+	}
+
 	send_gdb "\004"
 	gdb_expect {
 	    -re "end of file.*Program exited normally.*$gdb_prompt $" {
-- 
2.34.1