[RFA] Testcase for backtrace/1435

[Mark Kettenis <kettenis at chello dot nl>]

This adds a testcase for the patch I just submitted.  This is
i386-specific, but I don't know how to trick GCC into putting two
functions right after oneother without using assembler.

OK to check this in?

Mark


Index: ChangeLog
from  Mark Kettenis  <kettenis@gnu.org>

	* gdb.arch/i386-unwind.exp: New file.
	* gdb.arch/i386-unwind.c: New file.

Index: gdb.arch/i386-unwind.exp
===================================================================
RCS file: gdb.arch/i386-unwind.exp
diff -N gdb.arch/i386-unwind.exp
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gdb.arch/i386-unwind.exp 17 Nov 2003 21:38:21 -0000
@@ -0,0 +1,63 @@
+# Copyright 2003 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
+
+# Please email any bugs, comments, and/or additions to this file to:
+# bug-gdb@gnu.org
+
+# This file is part of the gdb testsuite.
+
+if $tracelevel {
+    strace $tracelevel
+}
+
+# Test i386 unwinder.
+
+set prms_id 0
+set bug_id 0
+
+if ![istarget "i?86-*-*"] then {
+    verbose "Skipping i386 unwinder tests."
+    return
+}
+
+set testfile "i386-unwind"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
+    gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+#
+# Run to `main' where we begin our tests.
+#
+
+if ![runto_main] then {
+    gdb_suppress_tests
+}
+
+# Testcase for backtrace/1435.
+
+gdb_test "continue" "Program received signal SIGTRAP.*" \
+         "continue past gdb1435"
+
+gdb_test "backtrace 10" \
+	"#1\[ \t]*$hex in gdb1435.*\r\n#2\[ \t\]*$hex in main.*" \
+	"backtrace past gdb1435"
Index: gdb.arch/i386-unwind.c
===================================================================
RCS file: gdb.arch/i386-unwind.c
diff -N gdb.arch/i386-unwind.c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gdb.arch/i386-unwind.c 17 Nov 2003 21:38:21 -0000
@@ -0,0 +1,42 @@
+/* Unwinder test program.
+
+   Copyright 2003 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+void
+trap (void)
+{
+  asm ("int $0x03");
+}
+
+/* Make sure that main directly follows a function without an
+   epilogue.  */
+
+asm(".text\n"
+    "    .align 8\n"
+    "    .globl gdb1435\n"
+    "gdb1435:\n"
+    "    pushl %ebp\n"
+    "    mov   %esp, %ebp\n"
+    "    call  trap\n"
+    "    .globl main\n"
+    "main:\n"
+    "    pushl %ebp\n"
+    "    mov   %esp, %ebp\n"
+    "    call  gdb1435\n");