[Qemu-devel] [PATCH 0/2] iotests: Emit signal-kill messages

[Qemu-devel] [PATCH 0/2] iotests: Emit signal-kill messages

[Max Reitz]

Currently, if a qemu-related command (qemu, qemu-io, qemu-img, qemu-nbd)
is invoked in an iotest, receives a signal and is subsequently killed
(e.g. a segmentation fault), this is not logged in the test output. The
first patch in this series makes the bash tests no longer suppress that
line, and the second patch adds a similar notification for the python
tests.


Max Reitz (2):
  iotests: Do not suppress segfaults in bash tests
  iotests: Warn if python subprocess is killed

 tests/qemu-iotests/039           | 19 ++++++-------------
 tests/qemu-iotests/039.out       |  6 +++---
 tests/qemu-iotests/061           |  6 ++++--
 tests/qemu-iotests/061.out       |  2 ++
 tests/qemu-iotests/check         |  8 ++++----
 tests/qemu-iotests/common.config | 34 ++++++++++++++++++++++++++++++----
 tests/qemu-iotests/common.rc     | 12 +++++++++++-
 tests/qemu-iotests/iotests.py    | 32 ++++++++++++++++++++++++--------
 8 files changed, 84 insertions(+), 35 deletions(-)

-- 
2.5.0

[Qemu-devel] [PATCH 1/2] iotests: Do not suppress segfaults in bash tests

[Max Reitz]

Currently, if a qemu/qemu-io/qemu-img/qemu-nbd invocation receives a
segmentation fault, that message is invisible in most cases since the
output is generally filtered and bash suppresses the segmentation fault
notice for any but the last element of a pipe.

Most of the time, the test will then fail anyway because of missing
output, but not necessarily (as happened with test 82 recently).

Fix this by making the corresponding environment variables point to
wrapper functions which execute the respective command in a subshell.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 tests/qemu-iotests/039           | 19 ++++++-------------
 tests/qemu-iotests/039.out       |  6 +++---
 tests/qemu-iotests/061           |  6 ++++--
 tests/qemu-iotests/061.out       |  2 ++
 tests/qemu-iotests/check         |  8 ++++----
 tests/qemu-iotests/common.config | 34 ++++++++++++++++++++++++++++++----
 tests/qemu-iotests/common.rc     | 12 +++++++++++-
 tests/qemu-iotests/iotests.py    |  6 +++---
 8 files changed, 63 insertions(+), 30 deletions(-)

diff --git a/tests/qemu-iotests/039 b/tests/qemu-iotests/039
index 859705f..617f397 100755
--- a/tests/qemu-iotests/039
+++ b/tests/qemu-iotests/039
@@ -47,13 +47,6 @@ _supported_os Linux
 _default_cache_mode "writethrough"
 _supported_cache_modes "writethrough"
 
-_subshell_exec()
-{
-    # Executing crashing commands in a subshell prevents information like the
-    # "Killed" line from being lost
-    (exec "$@")
-}
-
 size=128M
 
 echo
@@ -74,8 +67,8 @@ echo "== Creating a dirty image file =="
 IMGOPTS="compat=1.1,lazy_refcounts=on"
 _make_test_img $size
 
-_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
-                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
+$QEMU_IO -c "write -P 0x5a 0 512" \
+         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
     | _filter_qemu_io
 
 # The dirty bit must be set
@@ -109,8 +102,8 @@ echo "== Opening a dirty image read/write should repair it =="
 IMGOPTS="compat=1.1,lazy_refcounts=on"
 _make_test_img $size
 
-_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
-                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
+$QEMU_IO -c "write -P 0x5a 0 512" \
+         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
     | _filter_qemu_io
 
 # The dirty bit must be set
@@ -127,8 +120,8 @@ echo "== Creating an image file with lazy_refcounts=off =="
 IMGOPTS="compat=1.1,lazy_refcounts=off"
 _make_test_img $size
 
-_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
-                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
+$QEMU_IO -c "write -P 0x5a 0 512" \
+         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
     | _filter_qemu_io
 
 # The dirty bit must not be set since lazy_refcounts=off
diff --git a/tests/qemu-iotests/039.out b/tests/qemu-iotests/039.out
index d09751f..613ef1b 100644
--- a/tests/qemu-iotests/039.out
+++ b/tests/qemu-iotests/039.out
@@ -11,7 +11,7 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-./039: Killed                  ( exec "$@" )
+./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
 incompatible_features     0x1
 ERROR cluster 5 refcount=0 reference=1
 ERROR OFLAG_COPIED data cluster: l2_entry=8000000000050000 refcount=0
@@ -46,7 +46,7 @@ read 512/512 bytes at offset 0
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-./039: Killed                  ( exec "$@" )
+./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
 incompatible_features     0x1
 ERROR cluster 5 refcount=0 reference=1
 Rebuilding refcount structure
@@ -60,7 +60,7 @@ incompatible_features     0x0
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-./039: Killed                  ( exec "$@" )
+./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
 incompatible_features     0x0
 No errors were found on the image.
 
diff --git a/tests/qemu-iotests/061 b/tests/qemu-iotests/061
index 8d37f8a..1df887a 100755
--- a/tests/qemu-iotests/061
+++ b/tests/qemu-iotests/061
@@ -58,7 +58,8 @@ echo
 echo "=== Testing dirty version downgrade ==="
 echo
 IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M
-$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" 2>&1 \
+    | _filter_qemu_io
 $PYTHON qcow2.py "$TEST_IMG" dump-header
 $QEMU_IMG amend -o "compat=0.10" "$TEST_IMG"
 $PYTHON qcow2.py "$TEST_IMG" dump-header
@@ -91,7 +92,8 @@ echo
 echo "=== Testing dirty lazy_refcounts=off ==="
 echo
 IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M
-$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" 2>&1 \
+    | _filter_qemu_io
 $PYTHON qcow2.py "$TEST_IMG" dump-header
 $QEMU_IMG amend -o "lazy_refcounts=off" "$TEST_IMG"
 $PYTHON qcow2.py "$TEST_IMG" dump-header
diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
index 5ec248f..c9e3917 100644
--- a/tests/qemu-iotests/061.out
+++ b/tests/qemu-iotests/061.out
@@ -57,6 +57,7 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+./common.config: Aborted                 (core dumped) ( exec $QEMU_IO_CMD "$@" )
 magic                     0x514649fb
 version                   3
 backing_file_offset       0x0
@@ -214,6 +215,7 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+./common.config: Aborted                 (core dumped) ( exec $QEMU_IO_CMD "$@" )
 magic                     0x514649fb
 version                   3
 backing_file_offset       0x0
diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index 6d58203..b5a535e 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -231,10 +231,10 @@ FULL_HOST_DETAILS=`_full_platform_details`
 #FULL_MOUNT_OPTIONS=`_scratch_mount_options`
 
 cat <<EOF
-QEMU          -- $QEMU
-QEMU_IMG      -- $QEMU_IMG
-QEMU_IO       -- $QEMU_IO
-QEMU_NBD      -- $QEMU_NBD
+QEMU          -- $QEMU_CMD
+QEMU_IMG      -- $QEMU_IMG_CMD
+QEMU_IO       -- $QEMU_IO_CMD
+QEMU_NBD      -- $QEMU_NBD_CMD
 IMGFMT        -- $FULL_IMGFMT_DETAILS
 IMGPROTO      -- $FULL_IMGPROTO_DETAILS
 PLATFORM      -- $FULL_HOST_DETAILS
diff --git a/tests/qemu-iotests/common.config b/tests/qemu-iotests/common.config
index e0bf896..480efe6 100644
--- a/tests/qemu-iotests/common.config
+++ b/tests/qemu-iotests/common.config
@@ -103,10 +103,36 @@ if [ -z "$QEMU_NBD_PROG" ]; then
     export QEMU_NBD_PROG="`set_prog_path qemu-nbd`"
 fi
 
-export QEMU="$QEMU_PROG $QEMU_OPTIONS"
-export QEMU_IMG=$QEMU_IMG_PROG
-export QEMU_IO="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
-export QEMU_NBD=$QEMU_NBD_PROG
+export QEMU_CMD="$QEMU_PROG $QEMU_OPTIONS"
+export QEMU_IMG_CMD=$QEMU_IMG_PROG
+export QEMU_IO_CMD="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
+export QEMU_NBD_CMD=$QEMU_NBD_PROG
+
+_qemu_wrapper()
+{
+    (exec $QEMU_CMD "$@")
+}
+
+_qemu_img_wrapper()
+{
+    (exec $QEMU_IMG_CMD "$@")
+}
+
+_qemu_io_wrapper()
+{
+    (exec $QEMU_IO_CMD "$@")
+}
+
+_qemu_nbd_wrapper()
+{
+    (exec $QEMU_NBD_CMD "$@")
+}
+
+export QEMU=_qemu_wrapper
+export QEMU_IMG=_qemu_img_wrapper
+export QEMU_IO=_qemu_io_wrapper
+export QEMU_NBD=_qemu_nbd_wrapper
+
 default_machine=$($QEMU -machine \? | awk '/(default)/{print $1}')
 default_alias_machine=$($QEMU -machine \? |\
     awk -v var_default_machine="$default_machine"\)\
diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 22d3514..28e4bea 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -439,7 +439,17 @@ _unsupported_imgopts()
 #
 _require_command()
 {
-    eval c=\$$1
+    if [ "$1" = "QEMU" ]; then
+        c=$QEMU_PROG
+    elif [ "$1" = "QEMU_IMG" ]; then
+        c=$QEMU_IMG_PROG
+    elif [ "$1" = "QEMU_IO" ]; then
+        c=$QEMU_IO_PROG
+    elif [ "$1" = "QEMU_NBD" ]; then
+        c=$QEMU_NBD_PROG
+    else
+        eval c=\$$1
+    fi
     [ -x "$c" ] || _notrun "$1 utility required, skipped this test"
 }
 
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 5579253..927c74a 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -33,9 +33,9 @@ __all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
 
 # This will not work if arguments or path contain spaces but is necessary if we
 # want to support the override options that ./check supports.
-qemu_img_args = os.environ.get('QEMU_IMG', 'qemu-img').strip().split(' ')
-qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').strip().split(' ')
-qemu_args = os.environ.get('QEMU', 'qemu').strip().split(' ')
+qemu_img_args = os.environ.get('QEMU_IMG_CMD', 'qemu-img').strip().split(' ')
+qemu_io_args = os.environ.get('QEMU_IO_CMD', 'qemu-io').strip().split(' ')
+qemu_args = os.environ.get('QEMU_CMD', 'qemu').strip().split(' ')
 
 imgfmt = os.environ.get('IMGFMT', 'raw')
 imgproto = os.environ.get('IMGPROTO', 'file')
-- 
2.5.0

[Qemu-devel] [PATCH 2/2] iotests: Warn if python subprocess is killed

[Max Reitz]

Currently, if a subprocess of a python test (i.e. qemu-io, qemu-img, or
qemu) receives a signal and is subsequently aborted, this is not logged.

This patch makes python tests always check the exit code of these
subprocesses, and emit a message if they have been killed.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 tests/qemu-iotests/iotests.py | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 927c74a..d082597 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -49,20 +49,34 @@ socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper')
 def qemu_img(*args):
     '''Run qemu-img and return the exit code'''
     devnull = open('/dev/null', 'r+')
-    return subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
+    exitcode = subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
+    if exitcode < 0:
+        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
+    return exitcode
 
 def qemu_img_verbose(*args):
     '''Run qemu-img without suppressing its output and return the exit code'''
-    return subprocess.call(qemu_img_args + list(args))
+    exitcode = subprocess.call(qemu_img_args + list(args))
+    if exitcode < 0:
+        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
+    return exitcode
 
 def qemu_img_pipe(*args):
     '''Run qemu-img and return its output'''
-    return subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE).communicate()[0]
+    subp = subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE)
+    exitcode = subp.wait()
+    if exitcode < 0:
+        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
+    return subp.communicate()[0]
 
 def qemu_io(*args):
     '''Run qemu-io and return the stdout data'''
     args = qemu_io_args + list(args)
-    return subprocess.Popen(args, stdout=subprocess.PIPE).communicate()[0]
+    subp = subprocess.Popen(args, stdout=subprocess.PIPE)
+    exitcode = subp.wait()
+    if exitcode < 0:
+        sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args)))
+    return subp.communicate()[0]
 
 def compare_images(img1, img2):
     '''Return True if two image files are identical'''
@@ -197,7 +211,9 @@ class VM(object):
         '''Terminate the VM and clean up'''
         if not self._popen is None:
             self._qmp.cmd('quit')
-            self._popen.wait()
+            exitcode = self._popen.wait()
+            if exitcode < 0:
+                sys.stderr.write('qemu received signal %i: %s\n' % (-exitcode, ' '.join(self._args)))
             os.remove(self._monitor_path)
             os.remove(self._qtest_path)
             os.remove(self._qemu_log_path)
-- 
2.5.0

Re: [Qemu-devel] [Qemu-block] [PATCH 1/2] iotests: Do not suppress segfaults in bash tests

[Jeff Cody]

On Mon, Aug 31, 2015 at 09:05:12PM +0200, Max Reitz wrote:
> Currently, if a qemu/qemu-io/qemu-img/qemu-nbd invocation receives a
> segmentation fault, that message is invisible in most cases since the
> output is generally filtered and bash suppresses the segmentation fault
> notice for any but the last element of a pipe.
> 
> Most of the time, the test will then fail anyway because of missing
> output, but not necessarily (as happened with test 82 recently).
> 
> Fix this by making the corresponding environment variables point to
> wrapper functions which execute the respective command in a subshell.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  tests/qemu-iotests/039           | 19 ++++++-------------
>  tests/qemu-iotests/039.out       |  6 +++---
>  tests/qemu-iotests/061           |  6 ++++--
>  tests/qemu-iotests/061.out       |  2 ++
>  tests/qemu-iotests/check         |  8 ++++----
>  tests/qemu-iotests/common.config | 34 ++++++++++++++++++++++++++++++----
>  tests/qemu-iotests/common.rc     | 12 +++++++++++-
>  tests/qemu-iotests/iotests.py    |  6 +++---
>  8 files changed, 63 insertions(+), 30 deletions(-)
>

Test 082 fails now:

  Testing: amend -f qcow2 -o backing_file=TEST_DIR/t.qcow2, -o help TEST_DIR/t.qcow2
  qemu-img: Invalid option list: backing_file=TEST_DIR/t.qcow2,
 +./common.config: line 117:   737 Segmentation fault      (core dumped) ( exec $QEMU_IMG_CMD "$@" )
  
  Testing: amend -f qcow2 -o backing_file=TEST_DIR/t.qcow2 -o ,help TEST_DIR/t.qcow2
  qemu-img: Invalid option list: ,help
 +./common.config: line 117:   746 Segmentation fault      (core dumped) ( exec $QEMU_IMG_CMD "$@" )
  
  Testing: amend -f qcow2 -o backing_file=TEST_DIR/t.qcow2 -o ,, -o help TEST_DIR/t.qcow2
  qemu-img: Invalid option list: ,,
 +./common.config: line 117:   756 Segmentation fault      (core dumped) ( exec $QEMU_IMG_CMD "$@" )
  
  Testing: amend -f qcow2 -o help
  Supported options


That shows me your patches are working well :)



> diff --git a/tests/qemu-iotests/039 b/tests/qemu-iotests/039
> index 859705f..617f397 100755
> --- a/tests/qemu-iotests/039
> +++ b/tests/qemu-iotests/039
> @@ -47,13 +47,6 @@ _supported_os Linux
>  _default_cache_mode "writethrough"
>  _supported_cache_modes "writethrough"
>  
> -_subshell_exec()
> -{
> -    # Executing crashing commands in a subshell prevents information like the
> -    # "Killed" line from being lost
> -    (exec "$@")
> -}
> -
>  size=128M
>  
>  echo
> @@ -74,8 +67,8 @@ echo "== Creating a dirty image file =="
>  IMGOPTS="compat=1.1,lazy_refcounts=on"
>  _make_test_img $size
>  
> -_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
> -                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
> +$QEMU_IO -c "write -P 0x5a 0 512" \
> +         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>      | _filter_qemu_io
>  
>  # The dirty bit must be set
> @@ -109,8 +102,8 @@ echo "== Opening a dirty image read/write should repair it =="
>  IMGOPTS="compat=1.1,lazy_refcounts=on"
>  _make_test_img $size
>  
> -_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
> -                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
> +$QEMU_IO -c "write -P 0x5a 0 512" \
> +         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>      | _filter_qemu_io
>  
>  # The dirty bit must be set
> @@ -127,8 +120,8 @@ echo "== Creating an image file with lazy_refcounts=off =="
>  IMGOPTS="compat=1.1,lazy_refcounts=off"
>  _make_test_img $size
>  
> -_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
> -                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
> +$QEMU_IO -c "write -P 0x5a 0 512" \
> +         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>      | _filter_qemu_io
>  
>  # The dirty bit must not be set since lazy_refcounts=off
> diff --git a/tests/qemu-iotests/039.out b/tests/qemu-iotests/039.out
> index d09751f..613ef1b 100644
> --- a/tests/qemu-iotests/039.out
> +++ b/tests/qemu-iotests/039.out
> @@ -11,7 +11,7 @@ No errors were found on the image.
>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
>  wrote 512/512 bytes at offset 0
>  512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -./039: Killed                  ( exec "$@" )
> +./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
>  incompatible_features     0x1
>  ERROR cluster 5 refcount=0 reference=1
>  ERROR OFLAG_COPIED data cluster: l2_entry=8000000000050000 refcount=0
> @@ -46,7 +46,7 @@ read 512/512 bytes at offset 0
>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
>  wrote 512/512 bytes at offset 0
>  512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -./039: Killed                  ( exec "$@" )
> +./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
>  incompatible_features     0x1
>  ERROR cluster 5 refcount=0 reference=1
>  Rebuilding refcount structure
> @@ -60,7 +60,7 @@ incompatible_features     0x0
>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
>  wrote 512/512 bytes at offset 0
>  512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -./039: Killed                  ( exec "$@" )
> +./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
>  incompatible_features     0x0
>  No errors were found on the image.
>  
> diff --git a/tests/qemu-iotests/061 b/tests/qemu-iotests/061
> index 8d37f8a..1df887a 100755
> --- a/tests/qemu-iotests/061
> +++ b/tests/qemu-iotests/061
> @@ -58,7 +58,8 @@ echo
>  echo "=== Testing dirty version downgrade ==="
>  echo
>  IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M
> -$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" | _filter_qemu_io
> +$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" 2>&1 \
> +    | _filter_qemu_io
>  $PYTHON qcow2.py "$TEST_IMG" dump-header
>  $QEMU_IMG amend -o "compat=0.10" "$TEST_IMG"
>  $PYTHON qcow2.py "$TEST_IMG" dump-header
> @@ -91,7 +92,8 @@ echo
>  echo "=== Testing dirty lazy_refcounts=off ==="
>  echo
>  IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M
> -$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" | _filter_qemu_io
> +$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" 2>&1 \
> +    | _filter_qemu_io
>  $PYTHON qcow2.py "$TEST_IMG" dump-header
>  $QEMU_IMG amend -o "lazy_refcounts=off" "$TEST_IMG"
>  $PYTHON qcow2.py "$TEST_IMG" dump-header
> diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
> index 5ec248f..c9e3917 100644
> --- a/tests/qemu-iotests/061.out
> +++ b/tests/qemu-iotests/061.out
> @@ -57,6 +57,7 @@ No errors were found on the image.
>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
>  wrote 131072/131072 bytes at offset 0
>  128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +./common.config: Aborted                 (core dumped) ( exec $QEMU_IO_CMD "$@" )
>  magic                     0x514649fb
>  version                   3
>  backing_file_offset       0x0
> @@ -214,6 +215,7 @@ No errors were found on the image.
>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
>  wrote 131072/131072 bytes at offset 0
>  128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +./common.config: Aborted                 (core dumped) ( exec $QEMU_IO_CMD "$@" )
>  magic                     0x514649fb
>  version                   3
>  backing_file_offset       0x0
> diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
> index 6d58203..b5a535e 100755
> --- a/tests/qemu-iotests/check
> +++ b/tests/qemu-iotests/check
> @@ -231,10 +231,10 @@ FULL_HOST_DETAILS=`_full_platform_details`
>  #FULL_MOUNT_OPTIONS=`_scratch_mount_options`
>  
>  cat <<EOF
> -QEMU          -- $QEMU
> -QEMU_IMG      -- $QEMU_IMG
> -QEMU_IO       -- $QEMU_IO
> -QEMU_NBD      -- $QEMU_NBD
> +QEMU          -- $QEMU_CMD
> +QEMU_IMG      -- $QEMU_IMG_CMD
> +QEMU_IO       -- $QEMU_IO_CMD
> +QEMU_NBD      -- $QEMU_NBD_CMD
>  IMGFMT        -- $FULL_IMGFMT_DETAILS
>  IMGPROTO      -- $FULL_IMGPROTO_DETAILS
>  PLATFORM      -- $FULL_HOST_DETAILS
> diff --git a/tests/qemu-iotests/common.config b/tests/qemu-iotests/common.config
> index e0bf896..480efe6 100644
> --- a/tests/qemu-iotests/common.config
> +++ b/tests/qemu-iotests/common.config
> @@ -103,10 +103,36 @@ if [ -z "$QEMU_NBD_PROG" ]; then
>      export QEMU_NBD_PROG="`set_prog_path qemu-nbd`"
>  fi
>  
> -export QEMU="$QEMU_PROG $QEMU_OPTIONS"
> -export QEMU_IMG=$QEMU_IMG_PROG
> -export QEMU_IO="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
> -export QEMU_NBD=$QEMU_NBD_PROG
> +export QEMU_CMD="$QEMU_PROG $QEMU_OPTIONS"
> +export QEMU_IMG_CMD=$QEMU_IMG_PROG
> +export QEMU_IO_CMD="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
> +export QEMU_NBD_CMD=$QEMU_NBD_PROG
> +

Unfortunately, these exports (old and new) make it so that pathnames
with spaces won't work (in case someone hasn't had it beaten into them
that spaced pathnames is begging for trouble...).  But luckily, I
think your patch make it easier to fix this, since you have the
wrapper!

I think we want to drop the _OPTIONS in each of the exports, e.g.:

-export QEMU="$QEMU_PROG $QEMU_OPTIONS"
+export QEMU_CMD="$QEMU_PROG"

And then instead of this:

> +_qemu_wrapper()
> +{
> +    (exec $QEMU_CMD "$@")
> +}
> +

Use this form, instead:

+_qemu_wrapper()
+{
+    (exec "$QEMU_CMD" "$QEMU_OPTIONS" "$@")
+}
+

> +_qemu_img_wrapper()
> +{
> +    (exec $QEMU_IMG_CMD "$@")
> +}
> +
> +_qemu_io_wrapper()
> +{
> +    (exec $QEMU_IO_CMD "$@")
> +}
> +
> +_qemu_nbd_wrapper()
> +{
> +    (exec $QEMU_NBD_CMD "$@")
> +}
> +

Repeat as appropriate, above.

> +export QEMU=_qemu_wrapper
> +export QEMU_IMG=_qemu_img_wrapper
> +export QEMU_IO=_qemu_io_wrapper
> +export QEMU_NBD=_qemu_nbd_wrapper
> +
>  default_machine=$($QEMU -machine \? | awk '/(default)/{print $1}')
>  default_alias_machine=$($QEMU -machine \? |\
>      awk -v var_default_machine="$default_machine"\)\
> diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
> index 22d3514..28e4bea 100644
> --- a/tests/qemu-iotests/common.rc
> +++ b/tests/qemu-iotests/common.rc
> @@ -439,7 +439,17 @@ _unsupported_imgopts()
>  #
>  _require_command()
>  {
> -    eval c=\$$1
> +    if [ "$1" = "QEMU" ]; then
> +        c=$QEMU_PROG
> +    elif [ "$1" = "QEMU_IMG" ]; then
> +        c=$QEMU_IMG_PROG
> +    elif [ "$1" = "QEMU_IO" ]; then
> +        c=$QEMU_IO_PROG
> +    elif [ "$1" = "QEMU_NBD" ]; then
> +        c=$QEMU_NBD_PROG
> +    else
> +        eval c=\$$1
> +    fi
>      [ -x "$c" ] || _notrun "$1 utility required, skipped this test"
>  }
>  
> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> index 5579253..927c74a 100644
> --- a/tests/qemu-iotests/iotests.py
> +++ b/tests/qemu-iotests/iotests.py
> @@ -33,9 +33,9 @@ __all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
>  
>  # This will not work if arguments or path contain spaces but is necessary if we
>  # want to support the override options that ./check supports.
> -qemu_img_args = os.environ.get('QEMU_IMG', 'qemu-img').strip().split(' ')
> -qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').strip().split(' ')
> -qemu_args = os.environ.get('QEMU', 'qemu').strip().split(' ')
> +qemu_img_args = os.environ.get('QEMU_IMG_CMD', 'qemu-img').strip().split(' ')
> +qemu_io_args = os.environ.get('QEMU_IO_CMD', 'qemu-io').strip().split(' ')
> +qemu_args = os.environ.get('QEMU_CMD', 'qemu').strip().split(' ')
>  
>  imgfmt = os.environ.get('IMGFMT', 'raw')
>  imgproto = os.environ.get('IMGPROTO', 'file')
> -- 
> 2.5.0
> 
> 

Re: [Qemu-devel] [Qemu-block] [PATCH 1/2] iotests: Do not suppress segfaults in bash tests

[Max Reitz]

[-- Attachment #1: Type: text/plain, Size: 12788 bytes --]

On 01.09.2015 00:55, Jeff Cody wrote:
> On Mon, Aug 31, 2015 at 09:05:12PM +0200, Max Reitz wrote:
>> Currently, if a qemu/qemu-io/qemu-img/qemu-nbd invocation receives a
>> segmentation fault, that message is invisible in most cases since the
>> output is generally filtered and bash suppresses the segmentation fault
>> notice for any but the last element of a pipe.
>>
>> Most of the time, the test will then fail anyway because of missing
>> output, but not necessarily (as happened with test 82 recently).
>>
>> Fix this by making the corresponding environment variables point to
>> wrapper functions which execute the respective command in a subshell.
>>
>> Signed-off-by: Max Reitz <mreitz@redhat.com>
>> ---
>>  tests/qemu-iotests/039           | 19 ++++++-------------
>>  tests/qemu-iotests/039.out       |  6 +++---
>>  tests/qemu-iotests/061           |  6 ++++--
>>  tests/qemu-iotests/061.out       |  2 ++
>>  tests/qemu-iotests/check         |  8 ++++----
>>  tests/qemu-iotests/common.config | 34 ++++++++++++++++++++++++++++++----
>>  tests/qemu-iotests/common.rc     | 12 +++++++++++-
>>  tests/qemu-iotests/iotests.py    |  6 +++---
>>  8 files changed, 63 insertions(+), 30 deletions(-)
>>
> 
> Test 082 fails now:
> 
>   Testing: amend -f qcow2 -o backing_file=TEST_DIR/t.qcow2, -o help TEST_DIR/t.qcow2
>   qemu-img: Invalid option list: backing_file=TEST_DIR/t.qcow2,
>  +./common.config: line 117:   737 Segmentation fault      (core dumped) ( exec $QEMU_IMG_CMD "$@" )
>   
>   Testing: amend -f qcow2 -o backing_file=TEST_DIR/t.qcow2 -o ,help TEST_DIR/t.qcow2
>   qemu-img: Invalid option list: ,help
>  +./common.config: line 117:   746 Segmentation fault      (core dumped) ( exec $QEMU_IMG_CMD "$@" )
>   
>   Testing: amend -f qcow2 -o backing_file=TEST_DIR/t.qcow2 -o ,, -o help TEST_DIR/t.qcow2
>   qemu-img: Invalid option list: ,,
>  +./common.config: line 117:   756 Segmentation fault      (core dumped) ( exec $QEMU_IMG_CMD "$@" )
>   
>   Testing: amend -f qcow2 -o help
>   Supported options
> 
> 
> That shows me your patches are working well :)

Yes, as intended. :-)

fyi, the patch fixing this is
http://lists.nongnu.org/archive/html/qemu-block/2015-08/msg00156.html.

>> diff --git a/tests/qemu-iotests/039 b/tests/qemu-iotests/039
>> index 859705f..617f397 100755
>> --- a/tests/qemu-iotests/039
>> +++ b/tests/qemu-iotests/039
>> @@ -47,13 +47,6 @@ _supported_os Linux
>>  _default_cache_mode "writethrough"
>>  _supported_cache_modes "writethrough"
>>  
>> -_subshell_exec()
>> -{
>> -    # Executing crashing commands in a subshell prevents information like the
>> -    # "Killed" line from being lost
>> -    (exec "$@")
>> -}
>> -
>>  size=128M
>>  
>>  echo
>> @@ -74,8 +67,8 @@ echo "== Creating a dirty image file =="
>>  IMGOPTS="compat=1.1,lazy_refcounts=on"
>>  _make_test_img $size
>>  
>> -_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
>> -                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>> +$QEMU_IO -c "write -P 0x5a 0 512" \
>> +         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>>      | _filter_qemu_io
>>  
>>  # The dirty bit must be set
>> @@ -109,8 +102,8 @@ echo "== Opening a dirty image read/write should repair it =="
>>  IMGOPTS="compat=1.1,lazy_refcounts=on"
>>  _make_test_img $size
>>  
>> -_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
>> -                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>> +$QEMU_IO -c "write -P 0x5a 0 512" \
>> +         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>>      | _filter_qemu_io
>>  
>>  # The dirty bit must be set
>> @@ -127,8 +120,8 @@ echo "== Creating an image file with lazy_refcounts=off =="
>>  IMGOPTS="compat=1.1,lazy_refcounts=off"
>>  _make_test_img $size
>>  
>> -_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
>> -                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>> +$QEMU_IO -c "write -P 0x5a 0 512" \
>> +         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
>>      | _filter_qemu_io
>>  
>>  # The dirty bit must not be set since lazy_refcounts=off
>> diff --git a/tests/qemu-iotests/039.out b/tests/qemu-iotests/039.out
>> index d09751f..613ef1b 100644
>> --- a/tests/qemu-iotests/039.out
>> +++ b/tests/qemu-iotests/039.out
>> @@ -11,7 +11,7 @@ No errors were found on the image.
>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
>>  wrote 512/512 bytes at offset 0
>>  512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>> -./039: Killed                  ( exec "$@" )
>> +./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
>>  incompatible_features     0x1
>>  ERROR cluster 5 refcount=0 reference=1
>>  ERROR OFLAG_COPIED data cluster: l2_entry=8000000000050000 refcount=0
>> @@ -46,7 +46,7 @@ read 512/512 bytes at offset 0
>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
>>  wrote 512/512 bytes at offset 0
>>  512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>> -./039: Killed                  ( exec "$@" )
>> +./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
>>  incompatible_features     0x1
>>  ERROR cluster 5 refcount=0 reference=1
>>  Rebuilding refcount structure
>> @@ -60,7 +60,7 @@ incompatible_features     0x0
>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
>>  wrote 512/512 bytes at offset 0
>>  512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>> -./039: Killed                  ( exec "$@" )
>> +./common.config: Killed                  ( exec $QEMU_IO_CMD "$@" )
>>  incompatible_features     0x0
>>  No errors were found on the image.
>>  
>> diff --git a/tests/qemu-iotests/061 b/tests/qemu-iotests/061
>> index 8d37f8a..1df887a 100755
>> --- a/tests/qemu-iotests/061
>> +++ b/tests/qemu-iotests/061
>> @@ -58,7 +58,8 @@ echo
>>  echo "=== Testing dirty version downgrade ==="
>>  echo
>>  IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M
>> -$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" | _filter_qemu_io
>> +$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" 2>&1 \
>> +    | _filter_qemu_io
>>  $PYTHON qcow2.py "$TEST_IMG" dump-header
>>  $QEMU_IMG amend -o "compat=0.10" "$TEST_IMG"
>>  $PYTHON qcow2.py "$TEST_IMG" dump-header
>> @@ -91,7 +92,8 @@ echo
>>  echo "=== Testing dirty lazy_refcounts=off ==="
>>  echo
>>  IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M
>> -$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" | _filter_qemu_io
>> +$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" 2>&1 \
>> +    | _filter_qemu_io
>>  $PYTHON qcow2.py "$TEST_IMG" dump-header
>>  $QEMU_IMG amend -o "lazy_refcounts=off" "$TEST_IMG"
>>  $PYTHON qcow2.py "$TEST_IMG" dump-header
>> diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
>> index 5ec248f..c9e3917 100644
>> --- a/tests/qemu-iotests/061.out
>> +++ b/tests/qemu-iotests/061.out
>> @@ -57,6 +57,7 @@ No errors were found on the image.
>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
>>  wrote 131072/131072 bytes at offset 0
>>  128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>> +./common.config: Aborted                 (core dumped) ( exec $QEMU_IO_CMD "$@" )
>>  magic                     0x514649fb
>>  version                   3
>>  backing_file_offset       0x0
>> @@ -214,6 +215,7 @@ No errors were found on the image.
>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
>>  wrote 131072/131072 bytes at offset 0
>>  128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>> +./common.config: Aborted                 (core dumped) ( exec $QEMU_IO_CMD "$@" )
>>  magic                     0x514649fb
>>  version                   3
>>  backing_file_offset       0x0
>> diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
>> index 6d58203..b5a535e 100755
>> --- a/tests/qemu-iotests/check
>> +++ b/tests/qemu-iotests/check
>> @@ -231,10 +231,10 @@ FULL_HOST_DETAILS=`_full_platform_details`
>>  #FULL_MOUNT_OPTIONS=`_scratch_mount_options`
>>  
>>  cat <<EOF
>> -QEMU          -- $QEMU
>> -QEMU_IMG      -- $QEMU_IMG
>> -QEMU_IO       -- $QEMU_IO
>> -QEMU_NBD      -- $QEMU_NBD
>> +QEMU          -- $QEMU_CMD
>> +QEMU_IMG      -- $QEMU_IMG_CMD
>> +QEMU_IO       -- $QEMU_IO_CMD
>> +QEMU_NBD      -- $QEMU_NBD_CMD
>>  IMGFMT        -- $FULL_IMGFMT_DETAILS
>>  IMGPROTO      -- $FULL_IMGPROTO_DETAILS
>>  PLATFORM      -- $FULL_HOST_DETAILS
>> diff --git a/tests/qemu-iotests/common.config b/tests/qemu-iotests/common.config
>> index e0bf896..480efe6 100644
>> --- a/tests/qemu-iotests/common.config
>> +++ b/tests/qemu-iotests/common.config
>> @@ -103,10 +103,36 @@ if [ -z "$QEMU_NBD_PROG" ]; then
>>      export QEMU_NBD_PROG="`set_prog_path qemu-nbd`"
>>  fi
>>  
>> -export QEMU="$QEMU_PROG $QEMU_OPTIONS"
>> -export QEMU_IMG=$QEMU_IMG_PROG
>> -export QEMU_IO="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
>> -export QEMU_NBD=$QEMU_NBD_PROG
>> +export QEMU_CMD="$QEMU_PROG $QEMU_OPTIONS"
>> +export QEMU_IMG_CMD=$QEMU_IMG_PROG
>> +export QEMU_IO_CMD="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
>> +export QEMU_NBD_CMD=$QEMU_NBD_PROG
>> +
> 
> Unfortunately, these exports (old and new) make it so that pathnames
> with spaces won't work (in case someone hasn't had it beaten into them
> that spaced pathnames is begging for trouble...).  But luckily, I
> think your patch make it easier to fix this, since you have the
> wrapper!
> 
> I think we want to drop the _OPTIONS in each of the exports, e.g.:
> 
> -export QEMU="$QEMU_PROG $QEMU_OPTIONS"
> +export QEMU_CMD="$QEMU_PROG"
> 
> And then instead of this:
> 
>> +_qemu_wrapper()
>> +{
>> +    (exec $QEMU_CMD "$@")
>> +}
>> +
> 
> Use this form, instead:
> 
> +_qemu_wrapper()
> +{
> +    (exec "$QEMU_CMD" "$QEMU_OPTIONS" "$@")
> +}
> +

Yes, I tried not to break anything in that regard that wasn't already
broken, but if we have the chance to fix something, then we (I) should
go for it.

QEMU_CMD is used for the Python tests as the command line to be used for
qemu invocation, so it cannot be modified like that. But what I can do
is to drop QEMU.*_CMD and replace it by "$QEMU.*_PROG" "$QEMU.*_OPTIONS"
everywhere, I guess. I'll have a look.

Thanks for reviewing!

Max

>> +_qemu_img_wrapper()
>> +{
>> +    (exec $QEMU_IMG_CMD "$@")
>> +}
>> +
>> +_qemu_io_wrapper()
>> +{
>> +    (exec $QEMU_IO_CMD "$@")
>> +}
>> +
>> +_qemu_nbd_wrapper()
>> +{
>> +    (exec $QEMU_NBD_CMD "$@")
>> +}
>> +
> 
> Repeat as appropriate, above.
> 
>> +export QEMU=_qemu_wrapper
>> +export QEMU_IMG=_qemu_img_wrapper
>> +export QEMU_IO=_qemu_io_wrapper
>> +export QEMU_NBD=_qemu_nbd_wrapper
>> +
>>  default_machine=$($QEMU -machine \? | awk '/(default)/{print $1}')
>>  default_alias_machine=$($QEMU -machine \? |\
>>      awk -v var_default_machine="$default_machine"\)\
>> diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
>> index 22d3514..28e4bea 100644
>> --- a/tests/qemu-iotests/common.rc
>> +++ b/tests/qemu-iotests/common.rc
>> @@ -439,7 +439,17 @@ _unsupported_imgopts()
>>  #
>>  _require_command()
>>  {
>> -    eval c=\$$1
>> +    if [ "$1" = "QEMU" ]; then
>> +        c=$QEMU_PROG
>> +    elif [ "$1" = "QEMU_IMG" ]; then
>> +        c=$QEMU_IMG_PROG
>> +    elif [ "$1" = "QEMU_IO" ]; then
>> +        c=$QEMU_IO_PROG
>> +    elif [ "$1" = "QEMU_NBD" ]; then
>> +        c=$QEMU_NBD_PROG
>> +    else
>> +        eval c=\$$1
>> +    fi
>>      [ -x "$c" ] || _notrun "$1 utility required, skipped this test"
>>  }
>>  
>> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
>> index 5579253..927c74a 100644
>> --- a/tests/qemu-iotests/iotests.py
>> +++ b/tests/qemu-iotests/iotests.py
>> @@ -33,9 +33,9 @@ __all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
>>  
>>  # This will not work if arguments or path contain spaces but is necessary if we
>>  # want to support the override options that ./check supports.
>> -qemu_img_args = os.environ.get('QEMU_IMG', 'qemu-img').strip().split(' ')
>> -qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').strip().split(' ')
>> -qemu_args = os.environ.get('QEMU', 'qemu').strip().split(' ')
>> +qemu_img_args = os.environ.get('QEMU_IMG_CMD', 'qemu-img').strip().split(' ')
>> +qemu_io_args = os.environ.get('QEMU_IO_CMD', 'qemu-io').strip().split(' ')
>> +qemu_args = os.environ.get('QEMU_CMD', 'qemu').strip().split(' ')
>>  
>>  imgfmt = os.environ.get('IMGFMT', 'raw')
>>  imgproto = os.environ.get('IMGPROTO', 'file')
>> -- 
>> 2.5.0
>>
>>



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Re: [Qemu-devel] [Qemu-block] [PATCH 1/2] iotests: Do not suppress segfaults in bash tests

[Jeff Cody]

On Wed, Sep 02, 2015 at 05:09:41PM +0200, Max Reitz wrote:
> On 01.09.2015 00:55, Jeff Cody wrote:
> > On Mon, Aug 31, 2015 at 09:05:12PM +0200, Max Reitz wrote:
> >> Currently, if a qemu/qemu-io/qemu-img/qemu-nbd invocation receives a
> >> segmentation fault, that message is invisible in most cases since the
> >> output is generally filtered and bash suppresses the segmentation fault
> >> notice for any but the last element of a pipe.
> >>
> >> Most of the time, the test will then fail anyway because of missing
> >> output, but not necessarily (as happened with test 82 recently).
> >>
> >> Fix this by making the corresponding environment variables point to
> >> wrapper functions which execute the respective command in a subshell.
> >>
> >> Signed-off-by: Max Reitz <mreitz@redhat.com>
> >> ---
> >>  tests/qemu-iotests/039           | 19 ++++++-------------
> >>  tests/qemu-iotests/039.out       |  6 +++---
> >>  tests/qemu-iotests/061           |  6 ++++--
> >>  tests/qemu-iotests/061.out       |  2 ++
> >>  tests/qemu-iotests/check         |  8 ++++----
> >>  tests/qemu-iotests/common.config | 34 ++++++++++++++++++++++++++++++----
> >>  tests/qemu-iotests/common.rc     | 12 +++++++++++-
> >>  tests/qemu-iotests/iotests.py    |  6 +++---
> >>  8 files changed, 63 insertions(+), 30 deletions(-)
> >>

[snip]

> >>  
> >> -export QEMU="$QEMU_PROG $QEMU_OPTIONS"
> >> -export QEMU_IMG=$QEMU_IMG_PROG
> >> -export QEMU_IO="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
> >> -export QEMU_NBD=$QEMU_NBD_PROG
> >> +export QEMU_CMD="$QEMU_PROG $QEMU_OPTIONS"
> >> +export QEMU_IMG_CMD=$QEMU_IMG_PROG
> >> +export QEMU_IO_CMD="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
> >> +export QEMU_NBD_CMD=$QEMU_NBD_PROG
> >> +
> > 
> > Unfortunately, these exports (old and new) make it so that pathnames
> > with spaces won't work (in case someone hasn't had it beaten into them
> > that spaced pathnames is begging for trouble...).  But luckily, I
> > think your patch make it easier to fix this, since you have the
> > wrapper!
> > 
> > I think we want to drop the _OPTIONS in each of the exports, e.g.:
> > 
> > -export QEMU="$QEMU_PROG $QEMU_OPTIONS"
> > +export QEMU_CMD="$QEMU_PROG"
> > 
> > And then instead of this:
> > 
> >> +_qemu_wrapper()
> >> +{
> >> +    (exec $QEMU_CMD "$@")
> >> +}
> >> +
> > 
> > Use this form, instead:
> > 
> > +_qemu_wrapper()
> > +{
> > +    (exec "$QEMU_CMD" "$QEMU_OPTIONS" "$@")
> > +}
> > +
> 
> Yes, I tried not to break anything in that regard that wasn't already
> broken, but if we have the chance to fix something, then we (I) should
> go for it.
> 
> QEMU_CMD is used for the Python tests as the command line to be used for
> qemu invocation, so it cannot be modified like that. But what I can do
> is to drop QEMU.*_CMD and replace it by "$QEMU.*_PROG" "$QEMU.*_OPTIONS"
> everywhere, I guess. I'll have a look.
>

Good point.

I don't think it needs to be done in this patch series, as your
patches don't change this behavior.  It could be done in a follow-up
series, by you or someone else.

I'm happy to give my r-b as-is, and we can change it later.:

Reviewed-by: Jeff Cody <jcody@redhat.com>

> Thanks for reviewing!
> 
> Max

You're welcome :)

> 
> >> +_qemu_img_wrapper()
> >> +{
> >> +    (exec $QEMU_IMG_CMD "$@")
> >> +}
> >> +
> >> +_qemu_io_wrapper()
> >> +{
> >> +    (exec $QEMU_IO_CMD "$@")
> >> +}
> >> +
> >> +_qemu_nbd_wrapper()
> >> +{
> >> +    (exec $QEMU_NBD_CMD "$@")
> >> +}
> >> +
> > 
> > Repeat as appropriate, above.
> > 
> >> +export QEMU=_qemu_wrapper
> >> +export QEMU_IMG=_qemu_img_wrapper
> >> +export QEMU_IO=_qemu_io_wrapper
> >> +export QEMU_NBD=_qemu_nbd_wrapper
> >> +
> >>  default_machine=$($QEMU -machine \? | awk '/(default)/{print $1}')
> >>  default_alias_machine=$($QEMU -machine \? |\
> >>      awk -v var_default_machine="$default_machine"\)\
> >> diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
> >> index 22d3514..28e4bea 100644
> >> --- a/tests/qemu-iotests/common.rc
> >> +++ b/tests/qemu-iotests/common.rc
> >> @@ -439,7 +439,17 @@ _unsupported_imgopts()
> >>  #
> >>  _require_command()
> >>  {
> >> -    eval c=\$$1
> >> +    if [ "$1" = "QEMU" ]; then
> >> +        c=$QEMU_PROG
> >> +    elif [ "$1" = "QEMU_IMG" ]; then
> >> +        c=$QEMU_IMG_PROG
> >> +    elif [ "$1" = "QEMU_IO" ]; then
> >> +        c=$QEMU_IO_PROG
> >> +    elif [ "$1" = "QEMU_NBD" ]; then
> >> +        c=$QEMU_NBD_PROG
> >> +    else
> >> +        eval c=\$$1
> >> +    fi
> >>      [ -x "$c" ] || _notrun "$1 utility required, skipped this test"
> >>  }
> >>  
> >> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> >> index 5579253..927c74a 100644
> >> --- a/tests/qemu-iotests/iotests.py
> >> +++ b/tests/qemu-iotests/iotests.py
> >> @@ -33,9 +33,9 @@ __all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
> >>  
> >>  # This will not work if arguments or path contain spaces but is necessary if we
> >>  # want to support the override options that ./check supports.
> >> -qemu_img_args = os.environ.get('QEMU_IMG', 'qemu-img').strip().split(' ')
> >> -qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').strip().split(' ')
> >> -qemu_args = os.environ.get('QEMU', 'qemu').strip().split(' ')
> >> +qemu_img_args = os.environ.get('QEMU_IMG_CMD', 'qemu-img').strip().split(' ')
> >> +qemu_io_args = os.environ.get('QEMU_IO_CMD', 'qemu-io').strip().split(' ')
> >> +qemu_args = os.environ.get('QEMU_CMD', 'qemu').strip().split(' ')
> >>  
> >>  imgfmt = os.environ.get('IMGFMT', 'raw')
> >>  imgproto = os.environ.get('IMGPROTO', 'file')
> >> -- 
> >> 2.5.0
> >>
> >>
> 
> 

Re: [Qemu-devel] [Qemu-block] [PATCH 2/2] iotests: Warn if python subprocess is killed

[John Snow]

On 08/31/2015 03:05 PM, Max Reitz wrote:
> Currently, if a subprocess of a python test (i.e. qemu-io, qemu-img, or
> qemu) receives a signal and is subsequently aborted, this is not logged.
> 
> This patch makes python tests always check the exit code of these
> subprocesses, and emit a message if they have been killed.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  tests/qemu-iotests/iotests.py | 26 +++++++++++++++++++++-----
>  1 file changed, 21 insertions(+), 5 deletions(-)
> 
> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> index 927c74a..d082597 100644
> --- a/tests/qemu-iotests/iotests.py
> +++ b/tests/qemu-iotests/iotests.py
> @@ -49,20 +49,34 @@ socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper')
>  def qemu_img(*args):
>      '''Run qemu-img and return the exit code'''
>      devnull = open('/dev/null', 'r+')
> -    return subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
> +    exitcode = subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
> +    if exitcode < 0:
> +        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
> +    return exitcode
>  

Why tack on the arguments after the retcode for the print? The format
makes it look like it should be a description for the signal received.

>  def qemu_img_verbose(*args):
>      '''Run qemu-img without suppressing its output and return the exit code'''
> -    return subprocess.call(qemu_img_args + list(args))
> +    exitcode = subprocess.call(qemu_img_args + list(args))
> +    if exitcode < 0:
> +        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
> +    return exitcode
>  
>  def qemu_img_pipe(*args):
>      '''Run qemu-img and return its output'''
> -    return subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE).communicate()[0]
> +    subp = subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE)
> +    exitcode = subp.wait()
> +    if exitcode < 0:
> +        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
> +    return subp.communicate()[0]
>  
>  def qemu_io(*args):
>      '''Run qemu-io and return the stdout data'''
>      args = qemu_io_args + list(args)
> -    return subprocess.Popen(args, stdout=subprocess.PIPE).communicate()[0]
> +    subp = subprocess.Popen(args, stdout=subprocess.PIPE)
> +    exitcode = subp.wait()
> +    if exitcode < 0:
> +        sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args)))
> +    return subp.communicate()[0]
>  
>  def compare_images(img1, img2):
>      '''Return True if two image files are identical'''
> @@ -197,7 +211,9 @@ class VM(object):
>          '''Terminate the VM and clean up'''
>          if not self._popen is None:
>              self._qmp.cmd('quit')
> -            self._popen.wait()
> +            exitcode = self._popen.wait()
> +            if exitcode < 0:
> +                sys.stderr.write('qemu received signal %i: %s\n' % (-exitcode, ' '.join(self._args)))
>              os.remove(self._monitor_path)
>              os.remove(self._qtest_path)
>              os.remove(self._qemu_log_path)
> 

Re: [Qemu-devel] [Qemu-block] [PATCH 2/2] iotests: Warn if python subprocess is killed

[Max Reitz]

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On 08.09.2015 23:25, John Snow wrote:
> 
> 
> On 08/31/2015 03:05 PM, Max Reitz wrote:
>> Currently, if a subprocess of a python test (i.e. qemu-io, qemu-img, or
>> qemu) receives a signal and is subsequently aborted, this is not logged.
>>
>> This patch makes python tests always check the exit code of these
>> subprocesses, and emit a message if they have been killed.
>>
>> Signed-off-by: Max Reitz <mreitz@redhat.com>
>> ---
>>  tests/qemu-iotests/iotests.py | 26 +++++++++++++++++++++-----
>>  1 file changed, 21 insertions(+), 5 deletions(-)
>>
>> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
>> index 927c74a..d082597 100644
>> --- a/tests/qemu-iotests/iotests.py
>> +++ b/tests/qemu-iotests/iotests.py
>> @@ -49,20 +49,34 @@ socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper')
>>  def qemu_img(*args):
>>      '''Run qemu-img and return the exit code'''
>>      devnull = open('/dev/null', 'r+')
>> -    return subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
>> +    exitcode = subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
>> +    if exitcode < 0:
>> +        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
>> +    return exitcode
>>  
> 
> Why tack on the arguments after the retcode for the print? The format
> makes it look like it should be a description for the signal received.

qemu_img_args contains the qemu-img filename as well, so it should be
obvious that that is the command line.

For the "why": I hope it will make debugging easier by providing the
exact command line so you can reproduce the problem outside of the test.

Max

> 
>>  def qemu_img_verbose(*args):
>>      '''Run qemu-img without suppressing its output and return the exit code'''
>> -    return subprocess.call(qemu_img_args + list(args))
>> +    exitcode = subprocess.call(qemu_img_args + list(args))
>> +    if exitcode < 0:
>> +        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
>> +    return exitcode
>>  
>>  def qemu_img_pipe(*args):
>>      '''Run qemu-img and return its output'''
>> -    return subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE).communicate()[0]
>> +    subp = subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE)
>> +    exitcode = subp.wait()
>> +    if exitcode < 0:
>> +        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
>> +    return subp.communicate()[0]
>>  
>>  def qemu_io(*args):
>>      '''Run qemu-io and return the stdout data'''
>>      args = qemu_io_args + list(args)
>> -    return subprocess.Popen(args, stdout=subprocess.PIPE).communicate()[0]
>> +    subp = subprocess.Popen(args, stdout=subprocess.PIPE)
>> +    exitcode = subp.wait()
>> +    if exitcode < 0:
>> +        sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args)))
>> +    return subp.communicate()[0]
>>  
>>  def compare_images(img1, img2):
>>      '''Return True if two image files are identical'''
>> @@ -197,7 +211,9 @@ class VM(object):
>>          '''Terminate the VM and clean up'''
>>          if not self._popen is None:
>>              self._qmp.cmd('quit')
>> -            self._popen.wait()
>> +            exitcode = self._popen.wait()
>> +            if exitcode < 0:
>> +                sys.stderr.write('qemu received signal %i: %s\n' % (-exitcode, ' '.join(self._args)))
>>              os.remove(self._monitor_path)
>>              os.remove(self._qtest_path)
>>              os.remove(self._qemu_log_path)
>>



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Re: [Qemu-devel] [Qemu-block] [PATCH 2/2] iotests: Warn if python subprocess is killed

[John Snow]

On 09/08/2015 05:29 PM, Max Reitz wrote:
> On 08.09.2015 23:25, John Snow wrote:
>> 
>> 
>> On 08/31/2015 03:05 PM, Max Reitz wrote:
>>> Currently, if a subprocess of a python test (i.e. qemu-io,
>>> qemu-img, or qemu) receives a signal and is subsequently
>>> aborted, this is not logged.
>>> 
>>> This patch makes python tests always check the exit code of
>>> these subprocesses, and emit a message if they have been
>>> killed.
>>> 
>>> Signed-off-by: Max Reitz <mreitz@redhat.com> --- 
>>> tests/qemu-iotests/iotests.py | 26 +++++++++++++++++++++----- 1
>>> file changed, 21 insertions(+), 5 deletions(-)
>>> 
>>> diff --git a/tests/qemu-iotests/iotests.py
>>> b/tests/qemu-iotests/iotests.py index 927c74a..d082597 100644 
>>> --- a/tests/qemu-iotests/iotests.py +++
>>> b/tests/qemu-iotests/iotests.py @@ -49,20 +49,34 @@
>>> socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER',
>>> 'socket_scm_helper') def qemu_img(*args): '''Run qemu-img and
>>> return the exit code''' devnull = open('/dev/null', 'r+') -
>>> return subprocess.call(qemu_img_args + list(args),
>>> stdin=devnull, stdout=devnull) +    exitcode =
>>> subprocess.call(qemu_img_args + list(args), stdin=devnull,
>>> stdout=devnull) +    if exitcode < 0: +
>>> sys.stderr.write('qemu-img received signal %i: %s\n' %
>>> (-exitcode, ' '.join(qemu_img_args + list(args)))) +    return
>>> exitcode
>>> 
>> 
>> Why tack on the arguments after the retcode for the print? The
>> format makes it look like it should be a description for the
>> signal received.
> 
> qemu_img_args contains the qemu-img filename as well, so it should
> be obvious that that is the command line.
> 
> For the "why": I hope it will make debugging easier by providing
> the exact command line so you can reproduce the problem outside of
> the test.
> 
> Max
> 

Sorry for being captain bikeshed: can this be something like:

"%s received signal %i; args: %s"

to avoid the string looking like it was meant to answer the question
of what the signal was?
I won't insist on it, though:

Reviewed-by: John Snow <jsnow@redhat.com>

>> 
>>> def qemu_img_verbose(*args): '''Run qemu-img without
>>> suppressing its output and return the exit code''' -    return
>>> subprocess.call(qemu_img_args + list(args)) +    exitcode =
>>> subprocess.call(qemu_img_args + list(args)) +    if exitcode <
>>> 0: +        sys.stderr.write('qemu-img received signal %i:
>>> %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args)))) +
>>> return exitcode
>>> 
>>> def qemu_img_pipe(*args): '''Run qemu-img and return its
>>> output''' -    return subprocess.Popen(qemu_img_args +
>>> list(args), stdout=subprocess.PIPE).communicate()[0] +    subp
>>> = subprocess.Popen(qemu_img_args + list(args),
>>> stdout=subprocess.PIPE) +    exitcode = subp.wait() +    if
>>> exitcode < 0: +        sys.stderr.write('qemu-img received
>>> signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args +
>>> list(args)))) +    return subp.communicate()[0]
>>> 
>>> def qemu_io(*args): '''Run qemu-io and return the stdout
>>> data''' args = qemu_io_args + list(args) -    return
>>> subprocess.Popen(args,
>>> stdout=subprocess.PIPE).communicate()[0] +    subp =
>>> subprocess.Popen(args, stdout=subprocess.PIPE) +    exitcode =
>>> subp.wait() +    if exitcode < 0: +
>>> sys.stderr.write('qemu-io received signal %i: %s\n' %
>>> (-exitcode, ' '.join(args))) +    return subp.communicate()[0]
>>> 
>>> def compare_images(img1, img2): '''Return True if two image
>>> files are identical''' @@ -197,7 +211,9 @@ class VM(object): 
>>> '''Terminate the VM and clean up''' if not self._popen is
>>> None: self._qmp.cmd('quit') -            self._popen.wait() +
>>> exitcode = self._popen.wait() +            if exitcode < 0: +
>>> sys.stderr.write('qemu received signal %i: %s\n' % (-exitcode,
>>> ' '.join(self._args))) os.remove(self._monitor_path) 
>>> os.remove(self._qtest_path) os.remove(self._qemu_log_path)
>>> 
> 
> 

Re: [Qemu-devel] [Qemu-block] [PATCH 2/2] iotests: Warn if python subprocess is killed

[Max Reitz]

[-- Attachment #1: Type: text/plain, Size: 2406 bytes --]

On 08.09.2015 23:37, John Snow wrote:
> 
> 
> On 09/08/2015 05:29 PM, Max Reitz wrote:
>> On 08.09.2015 23:25, John Snow wrote:
>>>
>>>
>>> On 08/31/2015 03:05 PM, Max Reitz wrote:
>>>> Currently, if a subprocess of a python test (i.e. qemu-io,
>>>> qemu-img, or qemu) receives a signal and is subsequently
>>>> aborted, this is not logged.
>>>>
>>>> This patch makes python tests always check the exit code of
>>>> these subprocesses, and emit a message if they have been
>>>> killed.
>>>>
>>>> Signed-off-by: Max Reitz <mreitz@redhat.com> --- 
>>>> tests/qemu-iotests/iotests.py | 26 +++++++++++++++++++++----- 1
>>>> file changed, 21 insertions(+), 5 deletions(-)
>>>>
>>>> diff --git a/tests/qemu-iotests/iotests.py
>>>> b/tests/qemu-iotests/iotests.py index 927c74a..d082597 100644 
>>>> --- a/tests/qemu-iotests/iotests.py +++
>>>> b/tests/qemu-iotests/iotests.py @@ -49,20 +49,34 @@
>>>> socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER',
>>>> 'socket_scm_helper') def qemu_img(*args): '''Run qemu-img and
>>>> return the exit code''' devnull = open('/dev/null', 'r+') -
>>>> return subprocess.call(qemu_img_args + list(args),
>>>> stdin=devnull, stdout=devnull) +    exitcode =
>>>> subprocess.call(qemu_img_args + list(args), stdin=devnull,
>>>> stdout=devnull) +    if exitcode < 0: +
>>>> sys.stderr.write('qemu-img received signal %i: %s\n' %
>>>> (-exitcode, ' '.join(qemu_img_args + list(args)))) +    return
>>>> exitcode
>>>>
>>>
>>> Why tack on the arguments after the retcode for the print? The
>>> format makes it look like it should be a description for the
>>> signal received.
>>
>> qemu_img_args contains the qemu-img filename as well, so it should
>> be obvious that that is the command line.
>>
>> For the "why": I hope it will make debugging easier by providing
>> the exact command line so you can reproduce the problem outside of
>> the test.
>>
>> Max
>>
> 
> Sorry for being captain bikeshed: can this be something like:
> 
> "%s received signal %i; args: %s"
> 
> to avoid the string looking like it was meant to answer the question
> of what the signal was?
> I won't insist on it, though:
> 
> Reviewed-by: John Snow <jsnow@redhat.com>

Well, feel free to fix it since it's already in master. :-)

(also, compare how bash does it:
> $FILE: line $LINE: $PID $SIGNAL_NAME (core dumped) ($ARGS)
)

Max


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Re: [Qemu-devel] [Qemu-block] [PATCH 2/2] iotests: Warn if python subprocess is killed

[John Snow]

On 09/08/2015 05:38 PM, Max Reitz wrote:
> On 08.09.2015 23:37, John Snow wrote:
>> 
>> 
>> On 09/08/2015 05:29 PM, Max Reitz wrote:
>>> On 08.09.2015 23:25, John Snow wrote:
>>>> 
>>>> 
>>>> On 08/31/2015 03:05 PM, Max Reitz wrote:
>>>>> Currently, if a subprocess of a python test (i.e. qemu-io, 
>>>>> qemu-img, or qemu) receives a signal and is subsequently 
>>>>> aborted, this is not logged.
>>>>> 
>>>>> This patch makes python tests always check the exit code
>>>>> of these subprocesses, and emit a message if they have
>>>>> been killed.
>>>>> 
>>>>> Signed-off-by: Max Reitz <mreitz@redhat.com> --- 
>>>>> tests/qemu-iotests/iotests.py | 26
>>>>> +++++++++++++++++++++----- 1 file changed, 21
>>>>> insertions(+), 5 deletions(-)
>>>>> 
>>>>> diff --git a/tests/qemu-iotests/iotests.py 
>>>>> b/tests/qemu-iotests/iotests.py index 927c74a..d082597
>>>>> 100644 --- a/tests/qemu-iotests/iotests.py +++ 
>>>>> b/tests/qemu-iotests/iotests.py @@ -49,20 +49,34 @@ 
>>>>> socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 
>>>>> 'socket_scm_helper') def qemu_img(*args): '''Run qemu-img
>>>>> and return the exit code''' devnull = open('/dev/null',
>>>>> 'r+') - return subprocess.call(qemu_img_args + list(args), 
>>>>> stdin=devnull, stdout=devnull) +    exitcode = 
>>>>> subprocess.call(qemu_img_args + list(args), stdin=devnull, 
>>>>> stdout=devnull) +    if exitcode < 0: + 
>>>>> sys.stderr.write('qemu-img received signal %i: %s\n' % 
>>>>> (-exitcode, ' '.join(qemu_img_args + list(args)))) +
>>>>> return exitcode
>>>>> 
>>>> 
>>>> Why tack on the arguments after the retcode for the print?
>>>> The format makes it look like it should be a description for
>>>> the signal received.
>>> 
>>> qemu_img_args contains the qemu-img filename as well, so it
>>> should be obvious that that is the command line.
>>> 
>>> For the "why": I hope it will make debugging easier by
>>> providing the exact command line so you can reproduce the
>>> problem outside of the test.
>>> 
>>> Max
>>> 
>> 
>> Sorry for being captain bikeshed: can this be something like:
>> 
>> "%s received signal %i; args: %s"
>> 
>> to avoid the string looking like it was meant to answer the
>> question of what the signal was? I won't insist on it, though:
>> 
>> Reviewed-by: John Snow <jsnow@redhat.com>
> 
> Well, feel free to fix it since it's already in master. :-)
> 
> (also, compare how bash does it:
>> $FILE: line $LINE: $PID $SIGNAL_NAME (core dumped) ($ARGS)
> )
> 
> Max
> 

ugh! pfeh! didn't see the v2, sorry. ignore this garbage.

--js

Re: [Qemu-devel] [PATCH 1/2] iotests: Do not suppress segfaults in bash tests

[Kevin Wolf]

Am 31.08.2015 um 21:05 hat Max Reitz geschrieben:
> Currently, if a qemu/qemu-io/qemu-img/qemu-nbd invocation receives a
> segmentation fault, that message is invisible in most cases since the
> output is generally filtered and bash suppresses the segmentation fault
> notice for any but the last element of a pipe.
> 
> Most of the time, the test will then fail anyway because of missing
> output, but not necessarily (as happened with test 82 recently).
> 
> Fix this by making the corresponding environment variables point to
> wrapper functions which execute the respective command in a subshell.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>

This patch seems to have broken -valgrind.

Kevin

Re: [Qemu-devel] [Qemu-block] [PATCH 1/2] iotests: Do not suppress segfaults in bash tests

[Jeff Cody]

On Thu, Oct 29, 2015 at 03:57:17PM +0100, Kevin Wolf wrote:
> Am 31.08.2015 um 21:05 hat Max Reitz geschrieben:
> > Currently, if a qemu/qemu-io/qemu-img/qemu-nbd invocation receives a
> > segmentation fault, that message is invisible in most cases since the
> > output is generally filtered and bash suppresses the segmentation fault
> > notice for any but the last element of a pipe.
> > 
> > Most of the time, the test will then fail anyway because of missing
> > output, but not necessarily (as happened with test 82 recently).
> > 
> > Fix this by making the corresponding environment variables point to
> > wrapper functions which execute the respective command in a subshell.
> > 
> > Signed-off-by: Max Reitz <mreitz@redhat.com>
> 
> This patch seems to have broken -valgrind.
>

Hi Kevin,

I just submitted another patch to fix this issue ("qemu-iotests: fix
-valgrind option for check")

Thanks,
Jeff