[PATCH,v2] Fix gdb.linespec/explicit.exp

[Luis Machado <lgustavo at codesourcery dot com>]

Changes in v2:

- Adjusted hex character pattern based on Keith Seitz's feedback and removed
  trailing whitespace.

I was chasing the cause of a few timeouts in this testcase (both on my local
machine, Ubuntu 16.04 x86-64, and on a aarch64-elf board) and managed to track
it down to this particular test:

	set tst "complete unique function name"
	send_gdb "break -function mai\t"
	gdb_test_multiple "" $tst {
	    "break -function mai\\\x07n " {
		send_gdb "\n"
		gdb_test "" ".*Breakpoint \[0-9\]+.*" $tst
		gdb_test_no_output "delete \$bpnum" "delete $tst breakpoint"
	    }
	}

FAIL: gdb.linespec/explicit.exp: complete unique function name (timeout)
FAIL: gdb.linespec/explicit.exp: complete non-unique function name (timeout)
FAIL: gdb.linespec/explicit.exp: complete non-existant function name (timeout)
FAIL: gdb.linespec/explicit.exp: complete unique file name (timeout)
FAIL: gdb.linespec/explicit.exp: complete non-unique file name (timeout)

There are 2 problems.

The first one is that i couldn't see the hex character x07 being ouput in both
of the above systems for this particular test. There is really only one
possible completion result for the main function. Maybe this character is
output in other systems?

So i started playing around with the regular expression to make x07 optional,
but no matter what pattern i used, it just didn't match.

It was then that i noticed we're missing a leading "-re" before the
gdb_test_multiple pattern to be matched, the second problem. I checked the
documentation for the command and did not find anything about the use
without "-re". So i assumed it is an oversight.

After the adjustments, i've made x07 optional and adjusted the pattern
according to Keith Seitz's feedback:

"break -function mai(\\\x07)?n"

I get full passes on Ubuntu 16.04 x86-64 and on aarch64-elf.

gdb/testsuite/ChangeLog

2017-01-31  Luis Machado  <lgustavo@codesourcery.com>

	* gdb.linespec/explicit.exp: Fix gdb_test_multiple calls missing
	the -re switch.
	Make the x07 character optional in the unique function name completion
	test.
---
 gdb/testsuite/gdb.linespec/explicit.exp | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/gdb/testsuite/gdb.linespec/explicit.exp b/gdb/testsuite/gdb.linespec/explicit.exp
index 637f476..e680a2e 100644
--- a/gdb/testsuite/gdb.linespec/explicit.exp
+++ b/gdb/testsuite/gdb.linespec/explicit.exp
@@ -154,7 +154,7 @@ namespace eval $testfile {
 	    set tst "complete 'break -$abbrev'"
 	    send_gdb "break -${abbrev}\t"
 	    gdb_test_multiple "" $tst {
-		"break -$full " {
+		-re "break -$full " {
 		    send_gdb "\n"
 		    gdb_test_multiple "" $tst {
 			-re "missing argument for \"-$full\".*$gdb_prompt " {
@@ -187,7 +187,7 @@ namespace eval $testfile {
 	set tst "complete unique function name"
 	send_gdb "break -function mai\t"
 	gdb_test_multiple "" $tst {
-	    "break -function mai\\\x07n" {
+	    -re "break -function mai(\\\x07)?n" {
 		send_gdb "\n"
 		gdb_test "" ".*Breakpoint \[0-9\]+.*" $tst
 		gdb_test_no_output "delete \$bpnum" "delete $tst breakpoint"
@@ -197,7 +197,7 @@ namespace eval $testfile {
 	set tst "complete non-unique function name"
 	send_gdb "break -function myfunc\t"
 	gdb_test_multiple "" $tst {
-	    "break -function myfunc\\\x07tion" {
+	    -re "break -function myfunc\\\x07tion" {
 		send_gdb "\t\t"
 		gdb_test_multiple "" $tst {
 		    -re "\\\x07\r\nmyfunction\[ \t\]+myfunction2\[ \t\]+myfunction3\[ \t\]+myfunction4\[ \t\]+\r\n$gdb_prompt " {
@@ -211,7 +211,7 @@ namespace eval $testfile {
 	set tst "complete non-existant function name"
 	send_gdb "break -function foo\t"
 	gdb_test_multiple "" $tst {
-	    "break -function foo\\\x07" {
+	    -re "break -function foo\\\x07" {
 		send_gdb "\t\t"
 		gdb_test_multiple "" $tst {
 		    -re "\\\x07\\\x07" {
@@ -225,7 +225,7 @@ namespace eval $testfile {
 	set tst "complete unique file name"
 	send_gdb "break -source 3ex\t"
 	gdb_test_multiple "" $tst {
-	    "break -source 3explicit.c " {
+	    -re "break -source 3explicit.c " {
 		send_gdb "\n"
 		gdb_test "" \
 		    {Source filename requires function, label, or line offset.} $tst
@@ -235,7 +235,7 @@ namespace eval $testfile {
 	set tst "complete non-unique file name"
 	send_gdb "break -source exp\t"
 	gdb_test_multiple "" $tst {
-	    "break -source exp\\\x07licit" {
+	    -re "break -source exp\\\x07licit" {
 		send_gdb "\t\t"
 		gdb_test_multiple "" $tst {
 		    -re "\\\x07\r\nexplicit.c\[ \t\]+explicit2.c\[ \t\]+\r\n$gdb_prompt" {
@@ -247,7 +247,7 @@ namespace eval $testfile {
 		}
 	    }
 
-	    "break -source exp\\\x07l" {
+	    -re "break -source exp\\\x07l" {
 		# This pattern may occur when glibc debuginfo is installed.
 		send_gdb "\t\t"
 		gdb_test_multiple "" $tst {
@@ -264,10 +264,10 @@ namespace eval $testfile {
 	set tst "complete non-existant file name"
 	send_gdb "break -source foo\t"
 	gdb_test_multiple "" $tst {
-	    "break -source foo" {
+	    -re "break -source foo" {
 		send_gdb "\t\t"
 		gdb_test_multiple "" $tst {
-		    "\\\x07\\\x07" {
+		    -re "\\\x07\\\x07" {
 			send_gdb "\n"
 			gdb_test "" \
 			    {Source filename requires function, label, or line offset.} \
@@ -280,7 +280,7 @@ namespace eval $testfile {
 	set tst "complete filename and unique function name"
 	send_gdb "break -source explicit.c -function ma\t"
 	gdb_test_multiple "" $tst {
-	    "break -source explicit.c -function main " {
+	    -re "break -source explicit.c -function main " {
 		send_gdb "\n"
 		gdb_test "" ".*Breakpoint .*" $tst
 		gdb_test_no_output "delete \$bpnum" "delete $tst breakpoint"
@@ -290,7 +290,7 @@ namespace eval $testfile {
 	set tst "complete filename and non-unique function name"
 	send_gdb "break -so 3explicit.c -func myfunc\t"
 	gdb_test_multiple "" $tst {
-	    "break -so 3explicit.c -func myfunc\\\x07tion" {
+	    -re "break -so 3explicit.c -func myfunc\\\x07tion" {
 		send_gdb "\t\t"
 		gdb_test_multiple "" $tst {
 		    -re "\\\x07\r\nmyfunction3\[ \t\]+myfunction4\[ \t\]+\r\n$gdb_prompt " {
@@ -304,10 +304,10 @@ namespace eval $testfile {
 	set tst "complete filename and non-existant function name"
 	send_gdb "break -sou 3explicit.c -fun foo\t"
 	gdb_test_multiple "" $tst {
-	    "break -sou 3explicit.c -fun foo\\\x07" {
+	    -re "break -sou 3explicit.c -fun foo\\\x07" {
 		send_gdb "\t\t"
 		gdb_test_multiple "" $tst {
-		    "\\\x07\\\x07" {
+		    -re "\\\x07\\\x07" {
 			send_gdb "\n"
 			gdb_test "" \
 			    {Function "foo" not defined in "3explicit.c".} $tst
@@ -319,7 +319,7 @@ namespace eval $testfile {
 	set tst "complete filename and function reversed"
 	send_gdb "break -func myfunction4 -source 3ex\t"
 	gdb_test_multiple "" $tst {
-	    "break -func myfunction4 -source 3explicit.c " {
+	    -re "break -func myfunction4 -source 3explicit.c " {
 		send_gdb "\n"
 		gdb_test "" "Breakpoint \[0-9\]+.*" $tst
 		gdb_test_no_output "delete \$bpnum" "delete $tst breakpoint"
-- 
2.7.4