Re: [resubmit] gdb.base, r*.exp thru w*.exp

[Michael Snyder <msnyder@vmware.com>]

Frederic Riss wrote:
> Hi,
> 
> On 15 June 2010 18:19, Daniel Jacobowitz <dan@codesourcery.com> wrote:
>> This hunk unfortunately exhibits a common subtle pitfall :-(
>>
>> You can use bare gdb_expect with a string that contains gdb_prompt not
>> at the end, or contains more than one gdb_prompt, although it's a bit
>> tricky.  You can't do the same with gdb_test_multiple, because it has
>> patterns like ".*$gdb_prompt $" -> FAIL.  If the output comes out
>> buffered in such a way that the prompt is written separately from the
>> post-prompt text, this will match before GDB is done printing output.
> 
> OK, I audited the testsuite for uses of gdb_prompt in the middle of
> gdb_test_multiple patterns (well to be precise, I looked for such
> usage in the first pattern of every gdb_test_multiple. I becomes
> harder to grep for the following patterns). Here's the list of the
> problematic places I've found, which include all the failures I've
> seen:
> 
> 
> testsuite/gdb.base/setshow.exp
> 58:gdb_test_multiple "set annotate 2" "set annotate 2" {
> 59-    -re ".*\032\032pre-prompt.*$gdb_prompt .*\032\032prompt.*$" {
> --
> 64:gdb_test_multiple "show annotate" "show annotate 2" {
> 65-    -re ".*\032\032post-prompt.*Annotation_level is
> 2..*\032\032pre-prompt.*$gdb_prompt .*\032\032prompt.*$" {
> --
> 71:gdb_test_multiple "info line 1" "annotation_level 2" {
> 72-    -re ".*\032\032post-prompt.*Line 1 of .* is at address .* but
> contains no code.*:1:0:beg:0x.*\032\032pre-prompt.*$gdb_prompt
> .*\032\032prompt.*$" {
> 
> 
> testsuite/gdb.mi/mi2-basics.exp
> 63:    gdb_test_multiple "-gdb-version" "acceptance of MI operations" {
> 64-	-re "GNU gdb .*\r\n$mi_gdb_prompt$" {
> --
> 212:    gdb_test_multiple "-environment-path" "-environment-path" {
> 213-	-re "\\\^done,path=\"\(.*\)\"\r\n$mi_gdb_prompt" {
> testsuite/gdb.mi/mi2-console.exp
> 51:gdb_test_multiple "220-exec-next" "Started step over hello" {
> 52-    -re "220\\^running\r\n(\\*running,thread-id=\"all\"\r\n)?$mi_gdb_prompt"
> {
> 
> 
> testsuite/gdb.mi/mi2-return.exp
> 56:    gdb_test_multiple "111-exec-return" "return from callee4 now" {
> 57-	-re "111\\^done,frame=\{level=\"0\",addr=\"$hex\",func=\"callee3\",args=\\\[.*\\\],file=\".*basics.c\",fullname=\"${fullname_syntax}${srcfile}\",line=\"($line_callee3_call|$line_callee3_close_brace)\"\}\r\n$mi_gdb_prompt$"
> {
> testsuite/gdb.mi/mi2-var-display.exp
> 608:gdb_test_multiple "p/x \$fp" "print FP register" {
> 609-    -re ".*($hex).*\\^done\r\n$mi_gdb_prompt$" {
> testsuite/gdb.mi/mi-basics.exp
> 63:    gdb_test_multiple "-gdb-version" "acceptance of MI operations" {
> 64-	-re "GNU gdb .*\r\n$mi_gdb_prompt$" {
> --
> 210:    gdb_test_multiple "-environment-path" "-environment-path" {
> 211-	-re "\\\^done,path=\"\(.*\)\"\r\n$mi_gdb_prompt" {
> 
> 
> testsuite/gdb.mi/mi-nonstop-exit.exp
> 40:gdb_test_multiple "-gdb-show non-stop" "" {
> 41-    -re ".*\\^done,value=\"off\",supported=\"(\[^\"\]+)\"\r\n$mi_gdb_prompt$"
> {
> 
> 
> testsuite/gdb.mi/mi-nonstop.exp
> 50:gdb_test_multiple "-gdb-show non-stop" "" {
> 51-    -re ".*\\^done,value=\"off\",supported=\"(\[^\"\]+)\"\r\n$mi_gdb_prompt$"
> {
> --
> 96:gdb_test_multiple "-exec-interrupt --thread 1" "interrupted" {
> 97-    -re "\\^done\r\n$mi_gdb_prompt\\*stopped\[^\r\n\]+\r\n$" {
> --
> 107:gdb_test_multiple "-exec-continue --all" "resume all" {
> 108-    -re ".*\\*running,thread-id=\"3\"\r\n\\*running,thread-id=\"2\"\r\n\\*running,thread-id=\"1\"\r\n$mi_gdb_prompt"
> {
> testsuite/gdb.mi/mi-nsintrall.exp
> 40:gdb_test_multiple "-gdb-show non-stop" "" {
> 41-    -re ".*\\^done,value=\"off\",supported=\"(\[^\"\]+)\"\r\n$mi_gdb_prompt$"
> {
> --
> 80:gdb_test_multiple "-exec-continue --all" "resume all, no breakpoint" {
> 81-    -re ".*$running_re$mi_gdb_prompt" {
> --
> 99:gdb_test_multiple "-exec-continue --all" "resume all after interrupting" {
> 100-    -re ".*$running_re$mi_gdb_prompt" {
> 
> 
> testsuite/gdb.mi/mi-nsmoribund.exp
> 40:gdb_test_multiple "-gdb-show non-stop" "" {
> 41-    -re ".*\\^done,value=\"off\",supported=\"(\[^\"\]+)\"\r\n$mi_gdb_prompt$"
> {
> --
> 101:gdb_test_multiple "-exec-continue --all" "resume all, thread
> specific breakpoint" {
> 102-    -re ".*$running_re$mi_gdb_prompt" {
> 
> 
> testsuite/gdb.mi/mi-ns-stale-regcache.exp
> 54:gdb_test_multiple "-gdb-show non-stop" "" {
> 55-    -re ".*\\^done,value=\"off\",supported=\"(\[^\"\]+)\"\r\n$mi_gdb_prompt$"
> {
> 
> 
> testsuite/gdb.mi/mi-nsthrexec.exp
> 50:gdb_test_multiple "-gdb-show non-stop" "" {
> 51-    -re ".*\\^done,value=\"off\",supported=\"(\[^\"\]+)\"\r\n$mi_gdb_prompt$"
> {
> 
> 
> testsuite/gdb.mi/mi-return.exp
> 56:    gdb_test_multiple "111-exec-return" "return from callee4 now" {
> 57-	-re "111\\^done,frame=\{level=\"0\",addr=\"$hex\",func=\"callee3\",args=\\\[.*\\\],file=\".*basics.c\",fullname=\"${fullname_syntax}${srcfile}\",line=\"($line_callee3_call|$line_callee3_close_brace)\"\}\r\n$mi_gdb_prompt$"
> {
> testsuite/gdb.mi/mi-var-display.exp
> 609:gdb_test_multiple "p/x \$fp" "print FP register" {
> 610-    -re ".*($hex).*\\^done\r\n$mi_gdb_prompt$" {
> 
> 
> Note all the cases using mi_gdb_prompt. Even if the mi_gdb_prompt is
> at the end of the pattern, as it expands to gdb_prompt followed by a
> newline, it's as if we used gdb_prompt in the middle of the pattern.
> I've definitely seen at least mi(2)-return.exp exhibit this random
> failure.
> 
> Cheers,
> Fred

Hmmm... I don't recall changing most of those.  Are these all new failures?