RE: [RFA] testsuite: Avoid buffer overrun in gdb.base/default.exp

["Pierre Muller" <pierre.muller@ics-cnrs.unistra.fr>]

  As reported to me by Jan,
the previous email is not a valid patch
(due to Outlook inserting line breaks inside the patch itself).

  I finally found a fix that seems to remove that automatic line break insertion.

  The same patch is appended again below,
but it should normally be usable without problems.




  Thanks to Jan for the feedback,

Pierre Muller
Pascal language support maintainer for GDB


PS: For those interested, the fix consists for Outlook 2007 at least
in the addition of a registry key entry 
at HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Common\MailSettings
level named `WrapLines' type REG_DWORD and with value zero 
(displayed as "0x00000000 (0)" inside regedit32).
Other Outlook versions might need other keys (especially the 12.0 level,
Outlook 2003 seems to use 11.0 at that level, see
http://support.microsoft.com/?id=823921).

Here is the patch itself:


2010-08-06  Pierre Muller  <muller@ics.u-strasbg.fr>

	* gdb.base/default.exp (info set): Avoid full buffer error and force
	reading up to final gdb prompt.
	(show): Likewise.

Index: src/gdb/testsuite/gdb.base/default.exp
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/gdb.base/default.exp,v
retrieving revision 1.43
diff -u -p -r1.43 default.exp
--- src/gdb/testsuite/gdb.base/default.exp	7 Jul 2010 18:49:51 -0000	1.43
+++ src/gdb/testsuite/gdb.base/default.exp	6 Aug 2010 13:41:24 -0000
@@ -316,10 +316,37 @@ gdb_test "info s" "No stack." "info stac
 #test info stack
 gdb_test "info stack" "No stack." "info stack"
 #test info set
-# FIXME -- needs to match the entire output
-# FIXME -- on native solaris 2.8, this test fails due to this line:
+# Test improved to check three parts:
+# 1) confirm
+# 2) prompt
+# 3) write
+# And only succeed if all three are matched.
+# This should fix an old problem on native solaris 2.8,
+# where this test fails due to this line:
 #  prompt:  Gdb's prompt is "(gdb) ".^M
-gdb_test "info set" "confirm:  Whether to confirm potentially dangerous operations is o\[a-z\]*.(\[^\r\n\]*\[\r\n\])+history filename:  The filename in which to record the command history is (\[^\r\n\]*\[\r\n\])+listsize:  Number of source lines gdb will list by default is 10.*" "info set"
+set set_confirm_seen 0
+set set_prompt_seen 0
+gdb_test_multiple "info set" "info set" {
+    -re "confirm:  Whether to confirm potentially dangerous operations is o\[a-z\]*.(\[^\r\n\]*\[\r\n\])+history filename:  The filename in which to record the command history is (\[^\r\n\]*\[\r\n\])+listsize:  Number of source lines gdb will list by default is 10" {
+	verbose "Confirm dislayed"
+	set set_confirm_seen 1
+	exp_continue
+    }
+    -re "Gdb's prompt is \"$gdb_prompt \"" {
+	verbose "GDB prompt displayed"
+	set set_prompt_seen 1
+	exp_continue
+    }
+    -re "Writing into executable.*$gdb_prompt $" {
+	verbose "write displayed"
+	if { $set_prompt_seen && $set_confirm_seen } {
+	    pass "info set"
+	} else {
+	    verbose "prompt $set_prompt_seen confirm $set_confirm_seen"
+	    fail "info set (incomplete output)"
+	}
+    }
+}
 gdb_test "info symbol" "Argument required .address.."
 #test info source
 gdb_test  "info source" "No current source file..*" "info source"
@@ -651,7 +678,29 @@ gdb_test "show width" "Number of charact
 # This is only supported on targets which use exec.o.
 gdb_test "show write" "Writing into executable and core files is o.*" "show write"
 #test show
-gdb_test "show" "confirm:  *Whether to confirm potentially dangerous operations is on.(\[^\r\n\]*\[\r\n\])+history filename:  *The filename in which to record the command history is (\[^\r\n\]*\[\r\n\])+history save:  *Saving of the history record on exit is on.(\[^\r\n\]*\[\r\n\])+history size:  *The size of the command history is(\[^\r\n\]*\[\r\n\])+listsize:  *Number of source lines gdb will list by default is 10(\[^\r\n]*\[\r\n\])+print elements:  *Limit on string chars or array elements to print is 200..*" "show"
+set show_confirm_seen 0
+set show_prompt_seen 0
+gdb_test_multiple "show" "show" {
+    -re "confirm:  *Whether to confirm potentially dangerous operations is on.(\[^\r\n\]*\[\r\n\])+history filename:  *The filename in which to record the command history is (\[^\r\n\]*\[\r\n\])+history save:  *Saving of the history record on exit is on.(\[^\r\n\]*\[\r\n\])+history size:  *The size of the command history is(\[^\r\n\]*\[\r\n\])+listsize:  *Number of source lines gdb will list by default is 10(\[^\r\n]*\[\r\n\])+print elements:  *Limit on string chars or array elements to print is 200." {
+	verbose "Confirm dislayed"
+	set show_confirm_seen 1
+	exp_continue
+    }
+    -re "Gdb's prompt is \"$gdb_prompt \"" {
+	verbose "GDB prompt displayed"
+	set show_prompt_seen 1
+	exp_continue
+    }
+    -re "Writing into executable.*$gdb_prompt $" {
+	verbose "write displayed"
+	if { $show_prompt_seen && $show_confirm_seen } {
+	    pass "show"
+	} else {
+	    verbose "prompt $show_prompt_seen confirm $show_confirm_seen"
+	    fail "show (incomplete output)"
+	}
+    }
+}
 #test stepi "si" abbreviation
 gdb_test  "si" "The program is not being run." "stepi \"si\" abbreviation"
 #test stepi