[committed][gdb/testsuite] Add KFAIL for missing support of reverse-debugging of vmovd

[committed][gdb/testsuite] Add KFAIL for missing support of reverse-debugging of vmovd

[Tom de Vries]

Hi,

On my openSUSE Leap 15.1 system I run into:
...
(gdb) PASS: gdb.reverse/step-precsave.exp: turn on process record
break 76^M
Breakpoint 2 at 0x400654: file step-reverse.c, line 76.^M
(gdb) PASS: gdb.reverse/step-precsave.exp: breakpoint at end of main
continue^M
Continuing.^M
Process record does not support instruction 0xc5 at address 0x7ffff783fc70.^M
Process record: failed to record execution log.^M
^M
Program stopped.^M
0x00007ffff783fc70 in __memset_avx2_unaligned_erms () from /lib64/libc.so.6^M
(gdb) FAIL: gdb.reverse/step-precsave.exp: run to end of main
...

The problem is that the vmovd instruction is not supported in
reverse-debugging (PR record/23188).

Add a KFAIL for this PR.

Tested on x86_64-linux.

Committed to trunk.

Thanks,
- Tom

[gdb/testsuite] Add KFAIL for missing support of reverse-debugging of vmovd

gdb/testsuite/ChangeLog:

2019-09-27  Tom de Vries  <tdevries@suse.de>

	PR record/23188
	* gdb.reverse/step-precsave.exp: Add kfail for PR record/23188.

---
 gdb/testsuite/gdb.reverse/step-precsave.exp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.reverse/step-precsave.exp b/gdb/testsuite/gdb.reverse/step-precsave.exp
index 7443995c00..f5e15510e1 100644
--- a/gdb/testsuite/gdb.reverse/step-precsave.exp
+++ b/gdb/testsuite/gdb.reverse/step-precsave.exp
@@ -46,7 +46,15 @@ gdb_test "break $end_of_main" \
 
 # This can take awhile.
 with_timeout_factor 20 {
-    gdb_test "continue" "Breakpoint .* end of main .*" "run to end of main"
+    set test "run to end of main"
+    gdb_test_multiple "continue" $test {
+	-re "Breakpoint .* end of main .*" {
+	    pass $test
+	}
+	-re "Process record does not support instruction 0xc5 at.*$gdb_prompt $" {
+	    kfail "record/23188" $test
+	}
+    }
 }
 
 # So can this, against gdbserver, for example.

[committed][gdb/testsuite] Fix incomplete regexps in step-precsave.exp

[Tom de Vries]

[-- Attachment #1: Type: text/plain, Size: 953 bytes --]

[ was: Re: [committed][gdb/testsuite] Add KFAIL for missing support of
reverse-debugging of vmovd ]

On 27-09-19 10:37, Tom de Vries wrote:
> Hi,
> 
> On my openSUSE Leap 15.1 system I run into:
> ...
> (gdb) PASS: gdb.reverse/step-precsave.exp: turn on process record
> break 76^M
> Breakpoint 2 at 0x400654: file step-reverse.c, line 76.^M
> (gdb) PASS: gdb.reverse/step-precsave.exp: breakpoint at end of main
> continue^M
> Continuing.^M
> Process record does not support instruction 0xc5 at address 0x7ffff783fc70.^M
> Process record: failed to record execution log.^M
> ^M
> Program stopped.^M
> 0x00007ffff783fc70 in __memset_avx2_unaligned_erms () from /lib64/libc.so.6^M
> (gdb) FAIL: gdb.reverse/step-precsave.exp: run to end of main
> ...
> 
> The problem is that the vmovd instruction is not supported in
> reverse-debugging (PR record/23188).
> 
> Add a KFAIL for this PR.
> 

This fixes an oversight in the previous patch.

Thanks,
- Tom


[-- Attachment #2: 0001-gdb-testsuite-Fix-incomplete-regexps-in-step-precsave.exp.patch --]
[-- Type: text/x-patch, Size: 1433 bytes --]

[gdb/testsuite] Fix incomplete regexps in step-precsave.exp

The commit 68f7d34dd50 "[gdb/testsuite] Add KFAIL for missing support of
reverse-debugging of vmovd" rewrites a gdb_test into a gdb_test_multiple but
forgets to add the $gdb_prompt part in the regexp.

Add the missing parts of the regexps.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2019-09-27  Tom de Vries  <tdevries@suse.de>

	* gdb.reverse/step-precsave.exp: Add missing $gdb_prompt in regexps.

---
 gdb/testsuite/gdb.reverse/step-precsave.exp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/gdb/testsuite/gdb.reverse/step-precsave.exp b/gdb/testsuite/gdb.reverse/step-precsave.exp
index f5e15510e1f..2073b8a1542 100644
--- a/gdb/testsuite/gdb.reverse/step-precsave.exp
+++ b/gdb/testsuite/gdb.reverse/step-precsave.exp
@@ -47,11 +47,13 @@ gdb_test "break $end_of_main" \
 # This can take awhile.
 with_timeout_factor 20 {
     set test "run to end of main"
+    set pass_pattern "Breakpoint .* end of main .*"
+    set kfail_pattern "Process record does not support instruction 0xc5 at.*"
     gdb_test_multiple "continue" $test {
-	-re "Breakpoint .* end of main .*" {
+	-re "\[\r\n\]*(?:$pass_pattern)\[\r\n\]+$gdb_prompt $" {
 	    pass $test
 	}
-	-re "Process record does not support instruction 0xc5 at.*$gdb_prompt $" {
+	-re "\[\r\n\]*(?:$kfail_pattern)\[\r\n\]+$gdb_prompt $" {
 	    kfail "record/23188" $test
 	}
     }