[PULL 00/25] testing and logging updates

[PULL 00/25] testing and logging updates

[Alex Bennée]

The following changes since commit aceeaa69d28e6f08a24395d0aa6915b687d0a681:

  Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2019-12-17' into staging (2019-12-17 15:55:20 +0000)

are available in the Git repository at:

  https://github.com/stsquad/qemu.git tags/pull-tesing-and-misc-191219-1

for you to fetch changes up to 380976f40f909b735acb60d5d424de7eb1b7107e:

  tests/tcg: ensure we re-configure if configure.sh is updated (2019-12-19 08:20:16 +0000)

----------------------------------------------------------------
Various testing and logging updates

  - test tci with Travis
  - enable multiarch testing in Travis
  - default to out-of-tree builds
  - make changing logfile safe via RCU
  - remove redundant tests
  - remove gtester test from docker
  - convert DEBUG_MMAP to tracepoints
  - remove hand rolled glob function
  - trigger tcg re-configure when needed

----------------------------------------------------------------
Alex Bennée (8):
      configure: allow disable of cross compilation containers
      linux-user: convert target_mprotect debug to tracepoint
      linux-user: convert target_mmap debug to tracepoint
      linux-user: add target_mmap_complete tracepoint
      linux-user: log page table changes under -d page
      linux-user: convert target_munmap debug to a tracepoint
      trace: replace hand-crafted pattern_glob with g_pattern_match_simple
      tests/tcg: ensure we re-configure if configure.sh is updated

Paolo Bonzini (2):
      ci: build out-of-tree
      docker: gtester is no longer used

Robert Foley (6):
      Fix double free issue in qemu_set_log_filename().
      Cleaned up flow of code in qemu_set_log(), to simplify and clarify.
      Add a mutex to guarantee single writer to qemu_logfile handle.
      qemu_log_lock/unlock now preserves the qemu_logfile handle.
      Add use of RCU for qemu_logfile.
      Added tests for close and change of logfile.

Thomas Huth (8):
      travis.yml: Run tcg tests with tci
      iotests: Provide a function for checking the creation of huge files
      iotests: Skip test 060 if it is not possible to create large files
      iotests: Skip test 079 if it is not possible to create large files
      tests/hd-geo-test: Skip test when images can not be created
      tests/test-util-filemonitor: Skip test on non-x86 Travis containers
      travis.yml: Enable builds on arm64, ppc64le and s390x
      travis.yml: Remove the redundant clang-with-MAIN_SOFTMMU_TARGETS entry

Wainer dos Santos Moschetta (1):
      tests/vm: Allow to set qemu-img path

 docs/devel/testing.rst        |   6 ++-
 configure                     |   9 +++-
 include/exec/log.h            |  34 +++++++++++--
 include/qemu/log.h            |  48 +++++++++++++++---
 accel/tcg/cpu-exec.c          |   4 +-
 accel/tcg/translate-all.c     |   4 +-
 accel/tcg/translator.c        |   4 +-
 bsd-user/main.c               |   2 +-
 exec.c                        |   4 +-
 hw/net/can/can_sja1000.c      |   4 +-
 linux-user/main.c             |   2 +-
 linux-user/mmap.c             |  56 ++++-----------------
 net/can/can_socketcan.c       |   5 +-
 target/cris/translate.c       |   4 +-
 target/i386/translate.c       |   5 +-
 target/lm32/translate.c       |   4 +-
 target/microblaze/translate.c |   4 +-
 target/nios2/translate.c      |   4 +-
 target/tilegx/translate.c     |   6 ---
 target/unicore32/translate.c  |   4 +-
 tcg/tcg.c                     |  28 +++++++----
 tests/hd-geo-test.c           |  12 ++++-
 tests/test-logging.c          |  80 ++++++++++++++++++++++++++++++
 tests/test-util-filemonitor.c |  11 +++++
 trace/control.c               |  35 +------------
 util/log.c                    | 100 ++++++++++++++++++++++++++++---------
 .cirrus.yml                   |   8 ++-
 .gitlab-ci.yml                |  28 ++++++++---
 .shippable.yml                |   4 +-
 .travis.yml                   | 112 ++++++++++++++++++++++++++++++++++++------
 linux-user/trace-events       |   6 +++
 tests/docker/common.rc        |   7 +--
 tests/qemu-iotests/005        |   5 +-
 tests/qemu-iotests/060        |   3 ++
 tests/qemu-iotests/079        |   3 ++
 tests/qemu-iotests/220        |   6 +--
 tests/qemu-iotests/common.rc  |  10 ++++
 tests/tcg/Makefile.prereqs    |   2 +-
 tests/tcg/configure.sh        |   6 ++-
 tests/vm/Makefile.include     |   1 +
 tests/vm/basevm.py            |   5 ++
 tests/vm/centos               |   2 +-
 tests/vm/fedora               |   4 +-
 tests/vm/freebsd              |   3 +-
 tests/vm/netbsd               |   3 +-
 tests/vm/openbsd              |   3 +-
 tests/vm/ubuntu.i386          |   2 +-
 47 files changed, 486 insertions(+), 216 deletions(-)

-- 
2.20.1

[PULL 01/25] configure: allow disable of cross compilation containers

[Alex Bennée]

Our docker infrastructure isn't quite as multiarch as we would wish so
lets allow the user to disable it if they want. This will allow us to
use still run check-tcg on non-x86 CI setups.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Tested-by: Cleber Rosa <crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/configure b/configure
index 84b413dbfcf..e0c66ee9b68 100755
--- a/configure
+++ b/configure
@@ -302,6 +302,7 @@ audio_win_int=""
 libs_qga=""
 debug_info="yes"
 stack_protector=""
+use_containers="yes"
 
 if test -e "$source_path/.git"
 then
@@ -1534,6 +1535,10 @@ for opt do
   ;;
   --disable-plugins) plugins="no"
   ;;
+  --enable-containers) use_containers="yes"
+  ;;
+  --disable-containers) use_containers="no"
+  ;;
   *)
       echo "ERROR: unknown option $opt"
       echo "Try '$0 --help' for more information"
@@ -1717,6 +1722,7 @@ Advanced options (experts only):
                            track the maximum stack usage of stacks created by qemu_alloc_stack
   --enable-plugins
                            enable plugins via shared library loading
+  --disable-containers     don't use containers for cross-building
 
 Optional features, enabled with --enable-FEATURE and
 disabled with --disable-FEATURE, default is enabled if available:
@@ -7992,7 +7998,7 @@ done
 (for i in $cross_cc_vars; do
   export $i
 done
-export target_list source_path
+export target_list source_path use_containers
 $source_path/tests/tcg/configure.sh)
 
 # temporary config to build submodules
diff --git a/tests/tcg/configure.sh b/tests/tcg/configure.sh
index 6c4a471aeae..210e68396f2 100755
--- a/tests/tcg/configure.sh
+++ b/tests/tcg/configure.sh
@@ -36,8 +36,10 @@ TMPC="${TMPDIR1}/qemu-conf.c"
 TMPE="${TMPDIR1}/qemu-conf.exe"
 
 container="no"
-if has "docker" || has "podman"; then
-  container=$($python $source_path/tests/docker/docker.py probe)
+if test $use_containers = "yes"; then
+    if has "docker" || has "podman"; then
+        container=$($python $source_path/tests/docker/docker.py probe)
+    fi
 fi
 
 # cross compilers defaults, can be overridden with --cross-cc-ARCH
-- 
2.20.1

[PULL 02/25] tests/vm: Allow to set qemu-img path

[Alex Bennée]

From: Wainer dos Santos Moschetta <wainersm@redhat.com>

By default VM build test use qemu-img from system's PATH to
create the image disk. Due the lack of qemu-img on the system
or the desire to simply use a version built with QEMU, it would
be nice to allow one to set its path. So this patch makes that
possible by reading the path to qemu-img from QEMU_IMG if set,
otherwise it fallback to default behavior.

Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Message-Id: <20191114134246.12073-2-wainersm@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst
index 27f286858ad..ab5be0c7299 100644
--- a/docs/devel/testing.rst
+++ b/docs/devel/testing.rst
@@ -418,13 +418,15 @@ access, so they SHOULD NOT be exposed to external interfaces if you are
 concerned about attackers taking control of the guest and potentially
 exploiting a QEMU security bug to compromise the host.
 
-QEMU binary
------------
+QEMU binaries
+-------------
 
 By default, qemu-system-x86_64 is searched in $PATH to run the guest. If there
 isn't one, or if it is older than 2.10, the test won't work. In this case,
 provide the QEMU binary in env var: ``QEMU=/path/to/qemu-2.10+``.
 
+Likewise the path to qemu-img can be set in QEMU_IMG environment variable.
+
 Make jobs
 ---------
 
diff --git a/tests/vm/Makefile.include b/tests/vm/Makefile.include
index fea348e845c..9e7c46a4735 100644
--- a/tests/vm/Makefile.include
+++ b/tests/vm/Makefile.include
@@ -34,6 +34,7 @@ vm-help vm-test:
 	@echo "    DEBUG=1              	 - Enable verbose output on host and interactive debugging"
 	@echo "    V=1				 - Enable verbose ouput on host and guest commands"
 	@echo "    QEMU=/path/to/qemu		 - Change path to QEMU binary"
+	@echo "    QEMU_IMG=/path/to/qemu-img	 - Change path to qemu-img tool"
 
 vm-build-all: $(addprefix vm-build-, $(IMAGES))
 
diff --git a/tests/vm/basevm.py b/tests/vm/basevm.py
index 53b9515ee22..ed5dd4f3d0e 100755
--- a/tests/vm/basevm.py
+++ b/tests/vm/basevm.py
@@ -152,6 +152,11 @@ class BaseVM(object):
     def build_image(self, img):
         raise NotImplementedError
 
+    def exec_qemu_img(self, *args):
+        cmd = [os.environ.get("QEMU_IMG", "qemu-img")]
+        cmd.extend(list(args))
+        subprocess.check_call(cmd)
+
     def add_source_dir(self, src_dir):
         name = "data-" + hashlib.sha1(src_dir.encode("utf-8")).hexdigest()[:5]
         tarfile = os.path.join(self._tmpdir, name + ".tar")
diff --git a/tests/vm/centos b/tests/vm/centos
index b9e851f2d33..f2f0befd845 100755
--- a/tests/vm/centos
+++ b/tests/vm/centos
@@ -68,7 +68,7 @@ class CentosVM(basevm.BaseVM):
         sys.stderr.write("Extracting the image...\n")
         subprocess.check_call(["ln", "-f", cimg, img_tmp + ".xz"])
         subprocess.check_call(["xz", "--keep", "-dvf", img_tmp + ".xz"])
-        subprocess.check_call(["qemu-img", "resize", img_tmp, "50G"])
+        self.exec_qemu_img("resize", img_tmp, "50G")
         self.boot(img_tmp, extra_args = ["-cdrom", self._gen_cloud_init_iso()])
         self.wait_ssh()
         self.ssh_root_check("touch /etc/cloud/cloud-init.disabled")
diff --git a/tests/vm/fedora b/tests/vm/fedora
index 7fec1479fb7..8e270fc0f03 100755
--- a/tests/vm/fedora
+++ b/tests/vm/fedora
@@ -74,9 +74,7 @@ class FedoraVM(basevm.BaseVM):
 
         self.print_step("Preparing iso and disk image")
         subprocess.check_call(["cp", "-f", cimg, iso])
-        subprocess.check_call(["qemu-img", "create", "-f", "qcow2",
-                               img_tmp, self.size])
-
+        self.exec_qemu_img("create", "-f", "qcow2", img_tmp, self.size)
         self.print_step("Booting installer")
         self.boot(img_tmp, extra_args = [
             "-bios", "pc-bios/bios-256k.bin",
diff --git a/tests/vm/freebsd b/tests/vm/freebsd
index 2a19461a909..1825cc58218 100755
--- a/tests/vm/freebsd
+++ b/tests/vm/freebsd
@@ -82,8 +82,7 @@ class FreeBSDVM(basevm.BaseVM):
         self.print_step("Preparing iso and disk image")
         subprocess.check_call(["cp", "-f", cimg, iso_xz])
         subprocess.check_call(["xz", "-dvf", iso_xz])
-        subprocess.check_call(["qemu-img", "create", "-f", "qcow2",
-                               img_tmp, self.size])
+        self.exec_qemu_img("create", "-f", "qcow2", img_tmp, self.size)
 
         self.print_step("Booting installer")
         self.boot(img_tmp, extra_args = [
diff --git a/tests/vm/netbsd b/tests/vm/netbsd
index 611e6cc5b5c..ec6f3563b25 100755
--- a/tests/vm/netbsd
+++ b/tests/vm/netbsd
@@ -77,8 +77,7 @@ class NetBSDVM(basevm.BaseVM):
 
         self.print_step("Preparing iso and disk image")
         subprocess.check_call(["ln", "-f", cimg, iso])
-        subprocess.check_call(["qemu-img", "create", "-f", "qcow2",
-                               img_tmp, self.size])
+        self.exec_qemu_img("create", "-f", "qcow2", img_tmp, self.size)
 
         self.print_step("Booting installer")
         self.boot(img_tmp, extra_args = [
diff --git a/tests/vm/openbsd b/tests/vm/openbsd
index b92c39f89a6..6df5162dbf4 100755
--- a/tests/vm/openbsd
+++ b/tests/vm/openbsd
@@ -73,8 +73,7 @@ class OpenBSDVM(basevm.BaseVM):
 
         self.print_step("Preparing iso and disk image")
         subprocess.check_call(["cp", "-f", cimg, iso])
-        subprocess.check_call(["qemu-img", "create", "-f", "qcow2",
-                               img_tmp, self.size])
+        self.exec_qemu_img("create", "-f", "qcow2", img_tmp, self.size)
 
         self.print_step("Booting installer")
         self.boot(img_tmp, extra_args = [
diff --git a/tests/vm/ubuntu.i386 b/tests/vm/ubuntu.i386
index f611bebdc9d..3834cd7a8df 100755
--- a/tests/vm/ubuntu.i386
+++ b/tests/vm/ubuntu.i386
@@ -70,7 +70,7 @@ class UbuntuX86VM(basevm.BaseVM):
             sha256sum="28969840626d1ea80bb249c08eef1a4533e8904aa51a327b40f37ac4b4ff04ef")
         img_tmp = img + ".tmp"
         subprocess.check_call(["cp", "-f", cimg, img_tmp])
-        subprocess.check_call(["qemu-img", "resize", img_tmp, "50G"])
+        self.exec_qemu_img("resize", img_tmp, "50G")
         self.boot(img_tmp, extra_args = ["-cdrom", self._gen_cloud_init_iso()])
         self.wait_ssh()
         self.ssh_root_check("touch /etc/cloud/cloud-init.disabled")
-- 
2.20.1

[PULL 03/25] travis.yml: Run tcg tests with tci

[Alex Bennée]

From: Thomas Huth <thuth@redhat.com>

So far we only have compile coverage for tci. But since commit
2f160e0f9797c7522bfd0d09218d0c9340a5137c ("tci: Add implementation
for INDEX_op_ld16u_i64") has been included now, we can also run the
"tcg" and "qtest" tests with tci, so let's enable them in Travis now.
Since we don't gain much additional test coverage by compiling all
targets, and TCI is broken e.g. with the Sparc targets, we also limit
the target list to a reasonable subset now (which should still get us
test coverage by tests/boot-serial-test for example).

Tested-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20191204083133.6198-1-thuth@redhat.com>
[AJB: just --enable-debug-tcg]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/.travis.yml b/.travis.yml
index 6cb8af6fa59..15946293ff3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -214,10 +214,11 @@ matrix:
         - TEST_CMD=""
 
 
-    # We manually include builds which we disable "make check" for
+    # Check the TCG interpreter (TCI)
     - env:
-        - CONFIG="--enable-debug --enable-tcg-interpreter"
-        - TEST_CMD=""
+        - CONFIG="--enable-debug-tcg --enable-tcg-interpreter --disable-kvm --disable-containers
+            --target-list=alpha-softmmu,arm-softmmu,hppa-softmmu,m68k-softmmu,microblaze-softmmu,moxie-softmmu,ppc-softmmu,s390x-softmmu,x86_64-softmmu"
+        - TEST_CMD="make check-qtest check-tcg V=1"
 
 
     # We don't need to exercise every backend with every front-end
-- 
2.20.1

[PULL 04/25] iotests: Provide a function for checking the creation of huge files

[Alex Bennée]

From: Thomas Huth <thuth@redhat.com>

Some tests create huge (but sparse) files, and to be able to run those
tests in certain limited environments (like CI containers), we have to
check for the possibility to create such files first. Thus let's introduce
a common function to check for large files, and replace the already
existing checks in the iotests 005 and 220 with this function.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Tested-by: Cleber Rosa <crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191204154618.23560-2-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

diff --git a/tests/qemu-iotests/005 b/tests/qemu-iotests/005
index 58442762fe3..b6d03ac37de 100755
--- a/tests/qemu-iotests/005
+++ b/tests/qemu-iotests/005
@@ -59,10 +59,7 @@ fi
 # Sanity check: For raw, we require a file system that permits the creation
 # of a HUGE (but very sparse) file. Check we can create it before continuing.
 if [ "$IMGFMT" = "raw" ]; then
-    if ! truncate --size=5T "$TEST_IMG"; then
-        _notrun "file system on $TEST_DIR does not support large enough files"
-    fi
-    rm "$TEST_IMG"
+    _require_large_file 5T
 fi
 
 echo
diff --git a/tests/qemu-iotests/220 b/tests/qemu-iotests/220
index 2d62c5dcac2..15159270d33 100755
--- a/tests/qemu-iotests/220
+++ b/tests/qemu-iotests/220
@@ -42,10 +42,8 @@ echo "== Creating huge file =="
 
 # Sanity check: We require a file system that permits the creation
 # of a HUGE (but very sparse) file.  tmpfs works, ext4 does not.
-if ! truncate --size=513T "$TEST_IMG"; then
-    _notrun "file system on $TEST_DIR does not support large enough files"
-fi
-rm "$TEST_IMG"
+_require_large_file 513T
+
 IMGOPTS='cluster_size=2M,refcount_bits=1' _make_test_img 513T
 
 echo "== Populating refcounts =="
diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 0cc8acc9edd..6f0582c79af 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -643,5 +643,15 @@ _require_drivers()
     done
 }
 
+# Check that we have a file system that allows huge (but very sparse) files
+#
+_require_large_file()
+{
+    if ! truncate --size="$1" "$TEST_IMG"; then
+        _notrun "file system on $TEST_DIR does not support large enough files"
+    fi
+    rm "$TEST_IMG"
+}
+
 # make sure this script returns success
 true
-- 
2.20.1

[PULL 05/25] iotests: Skip test 060 if it is not possible to create large files

[Alex Bennée]

From: Thomas Huth <thuth@redhat.com>

Test 060 fails in the arm64, s390x and ppc64le LXD containers on Travis
(which we will hopefully enable in our CI soon). These containers
apparently do not allow large files to be created. The repair process
in test 060 creates a file of 64 GiB, so test first whether such large
files are possible and skip the test if that's not the case.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191204154618.23560-3-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

diff --git a/tests/qemu-iotests/060 b/tests/qemu-iotests/060
index b91d8321bb8..d96f17a4846 100755
--- a/tests/qemu-iotests/060
+++ b/tests/qemu-iotests/060
@@ -49,6 +49,9 @@ _supported_fmt qcow2
 _supported_proto file
 _supported_os Linux
 
+# The repair process will create a large file - so check for availability first
+_require_large_file 64G
+
 rt_offset=65536  # 0x10000 (XXX: just an assumption)
 rb_offset=131072 # 0x20000 (XXX: just an assumption)
 l1_offset=196608 # 0x30000 (XXX: just an assumption)
-- 
2.20.1

[PULL 06/25] iotests: Skip test 079 if it is not possible to create large files

[Alex Bennée]

From: Thomas Huth <thuth@redhat.com>

Test 079 fails in the arm64, s390x and ppc64le LXD containers on Travis
(which we will hopefully enable in our CI soon). These containers
apparently do not allow large files to be created. Test 079 tries to
create a 4G sparse file, which is apparently already too big for these
containers, so check first whether we can really create such files before
executing the test.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191204154618.23560-4-thuth@redhat.com>

diff --git a/tests/qemu-iotests/079 b/tests/qemu-iotests/079
index 81f0c21f530..78536d3bbfa 100755
--- a/tests/qemu-iotests/079
+++ b/tests/qemu-iotests/079
@@ -39,6 +39,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 _supported_fmt qcow2
 _supported_proto file nfs
 
+# Some containers (e.g. non-x86 on Travis) do not allow large files
+_require_large_file 4G
+
 echo "=== Check option preallocation and cluster_size ==="
 echo
 cluster_sizes="16384 32768 65536 131072 262144 524288 1048576 2097152 4194304"
-- 
2.20.1

[PULL 07/25] tests/hd-geo-test: Skip test when images can not be created

[Alex Bennée]

From: Thomas Huth <thuth@redhat.com>

In certain environments like restricted containers, we can not create
huge test images. To be able to use "make check" in such container
environments, too, let's skip the hd-geo-test instead of failing when
the test images could not be created.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191204154618.23560-5-thuth@redhat.com>

diff --git a/tests/hd-geo-test.c b/tests/hd-geo-test.c
index 7e86c5416cc..a2498005440 100644
--- a/tests/hd-geo-test.c
+++ b/tests/hd-geo-test.c
@@ -34,8 +34,13 @@ static char *create_test_img(int secs)
     fd = mkstemp(template);
     g_assert(fd >= 0);
     ret = ftruncate(fd, (off_t)secs * 512);
-    g_assert(ret == 0);
     close(fd);
+
+    if (ret) {
+        free(template);
+        template = NULL;
+    }
+
     return template;
 }
 
@@ -934,6 +939,10 @@ int main(int argc, char **argv)
     for (i = 0; i < backend_last; i++) {
         if (img_secs[i] >= 0) {
             img_file_name[i] = create_test_img(img_secs[i]);
+            if (!img_file_name[i]) {
+                g_test_message("Could not create test images.");
+                goto test_add_done;
+            }
         } else {
             img_file_name[i] = NULL;
         }
@@ -965,6 +974,7 @@ int main(int argc, char **argv)
                        "skipping hd-geo/override/* tests");
     }
 
+test_add_done:
     ret = g_test_run();
 
     for (i = 0; i < backend_last; i++) {
-- 
2.20.1

[PULL 08/25] tests/test-util-filemonitor: Skip test on non-x86 Travis containers

[Alex Bennée]

From: Thomas Huth <thuth@redhat.com>

test-util-filemonitor fails in restricted non-x86 Travis containers
since they apparently blacklisted some required system calls there.
Let's simply skip the test if we detect such an environment.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Tested-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20191204154618.23560-6-thuth@redhat.com>

diff --git a/tests/test-util-filemonitor.c b/tests/test-util-filemonitor.c
index 301cd2db619..45009c69f41 100644
--- a/tests/test-util-filemonitor.c
+++ b/tests/test-util-filemonitor.c
@@ -406,10 +406,21 @@ test_file_monitor_events(void)
     char *pathdst = NULL;
     QFileMonitorTestData data;
     GHashTable *ids = g_hash_table_new(g_int64_hash, g_int64_equal);
+    char *travis_arch;
 
     qemu_mutex_init(&data.lock);
     data.records = NULL;
 
+    /*
+     * This test does not work on Travis LXD containers since some
+     * syscalls are blocked in that environment.
+     */
+    travis_arch = getenv("TRAVIS_ARCH");
+    if (travis_arch && !g_str_equal(travis_arch, "x86_64")) {
+        g_test_skip("Test does not work on non-x86 Travis containers.");
+        return;
+    }
+
     /*
      * The file monitor needs the main loop running in
      * order to receive events from inotify. We must
-- 
2.20.1

[PULL 09/25] travis.yml: Enable builds on arm64, ppc64le and s390x

[Alex Bennée]

From: Thomas Huth <thuth@redhat.com>

Travis recently added the possibility to test on these architectures,
too, so let's enable them in our travis.yml file to extend our test
coverage.

Unfortunately, the libssh in this Ubuntu version (bionic) is in a pretty
unusable Frankenstein state and libspice-server-dev is not available here,
so we can not use the global list of packages to install, but have to
provide individual package lists instead.

Also, some of the iotests crash when using "dist: bionic" on arm64
and ppc64le, thus these two builders have to use "dist: xenial" until
the problem is understood / fixed.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20191204154618.23560-8-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

diff --git a/.travis.yml b/.travis.yml
index 15946293ff3..b68566b1fe9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -354,6 +354,92 @@ matrix:
         - TEST_CMD="make -j3 check-tcg V=1"
         - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
 
+    - arch: arm64
+      dist: xenial
+      addons:
+        apt_packages:
+          - libaio-dev
+          - libattr1-dev
+          - libbrlapi-dev
+          - libcap-ng-dev
+          - libgcrypt20-dev
+          - libgnutls28-dev
+          - libgtk-3-dev
+          - libiscsi-dev
+          - liblttng-ust-dev
+          - libncurses5-dev
+          - libnfs-dev
+          - libnss3-dev
+          - libpixman-1-dev
+          - libpng-dev
+          - librados-dev
+          - libsdl2-dev
+          - libseccomp-dev
+          - liburcu-dev
+          - libusb-1.0-0-dev
+          - libvdeplug-dev
+          - libvte-2.91-dev
+      env:
+        - TEST_CMD="make check check-tcg V=1"
+        - CONFIG="--disable-containers --target-list=${MAIN_SOFTMMU_TARGETS}"
+
+    - arch: ppc64le
+      dist: xenial
+      addons:
+        apt_packages:
+          - libaio-dev
+          - libattr1-dev
+          - libbrlapi-dev
+          - libcap-ng-dev
+          - libgcrypt20-dev
+          - libgnutls28-dev
+          - libgtk-3-dev
+          - libiscsi-dev
+          - liblttng-ust-dev
+          - libncurses5-dev
+          - libnfs-dev
+          - libnss3-dev
+          - libpixman-1-dev
+          - libpng-dev
+          - librados-dev
+          - libsdl2-dev
+          - libseccomp-dev
+          - liburcu-dev
+          - libusb-1.0-0-dev
+          - libvdeplug-dev
+          - libvte-2.91-dev
+      env:
+        - TEST_CMD="make check check-tcg V=1"
+        - CONFIG="--disable-containers --target-list=${MAIN_SOFTMMU_TARGETS},ppc64le-linux-user"
+
+    - arch: s390x
+      dist: bionic
+      addons:
+        apt_packages:
+          - libaio-dev
+          - libattr1-dev
+          - libbrlapi-dev
+          - libcap-ng-dev
+          - libgcrypt20-dev
+          - libgnutls28-dev
+          - libgtk-3-dev
+          - libiscsi-dev
+          - liblttng-ust-dev
+          - libncurses5-dev
+          - libnfs-dev
+          - libnss3-dev
+          - libpixman-1-dev
+          - libpng-dev
+          - librados-dev
+          - libsdl2-dev
+          - libseccomp-dev
+          - liburcu-dev
+          - libusb-1.0-0-dev
+          - libvdeplug-dev
+          - libvte-2.91-dev
+      env:
+        - TEST_CMD="make check check-tcg V=1"
+        - CONFIG="--disable-containers --target-list=${MAIN_SOFTMMU_TARGETS},s390x-linux-user"
 
     # Release builds
     # The make-release script expect a QEMU version, so our tag must start with a 'v'.
-- 
2.20.1

[PULL 10/25] ci: build out-of-tree

[Alex Bennée]

From: Paolo Bonzini <pbonzini@redhat.com>

Most developers are using out-of-tree builds and it was discussed in the past
to only allow those.  To prepare for the transition, use out-of-tree builds
in all continuous integration jobs.

Based on a patch by Marc-André Lureau.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Li-Wen Hsu <lwhsu@freebsd.org>
Message-Id: <1576074829-56711-1-git-send-email-pbonzini@redhat.com>

diff --git a/configure b/configure
index e0c66ee9b68..93625811a05 100755
--- a/configure
+++ b/configure
@@ -6401,6 +6401,7 @@ else
 echo "local state directory   queried at runtime"
 echo "Windows SDK       $win_sdk"
 fi
+echo "Build directory   $(pwd)"
 echo "Source path       $source_path"
 echo "GIT binary        $git"
 echo "GIT submodules    $git_submodules"
diff --git a/.cirrus.yml b/.cirrus.yml
index 27efc48619b..90645fede6b 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -22,7 +22,9 @@ macos_task:
   install_script:
     - brew install pkg-config python gnu-sed glib pixman make sdl2
   script:
-    - ./configure --python=/usr/local/bin/python3 || { cat config.log; exit 1; }
+    - mkdir build
+    - cd build
+    - ../configure --python=/usr/local/bin/python3 || { cat config.log; exit 1; }
     - gmake -j$(sysctl -n hw.ncpu)
     - gmake check -j$(sysctl -n hw.ncpu)
 
@@ -33,6 +35,8 @@ macos_xcode_task:
   install_script:
     - brew install pkg-config gnu-sed glib pixman make sdl2
   script:
-    - ./configure --cc=clang || { cat config.log; exit 1; }
+    - mkdir build
+    - cd build
+    - ../configure --cc=clang || { cat config.log; exit 1; }
     - gmake -j$(sysctl -n hw.ncpu)
     - gmake check -j$(sysctl -n hw.ncpu)
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e3db1b847cc..ebcef0ebe9b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,7 +6,9 @@ build-system1:
  script:
  - apt-get install -y -qq libgtk-3-dev libvte-dev nettle-dev libcacard-dev
       libusb-dev libvde-dev libspice-protocol-dev libgl1-mesa-dev libvdeplug-dev
- - ./configure --enable-werror --target-list="aarch64-softmmu alpha-softmmu
+ - mkdir build
+ - cd build
+ - ../configure --enable-werror --target-list="aarch64-softmmu alpha-softmmu
       cris-softmmu hppa-softmmu lm32-softmmu moxie-softmmu microblazeel-softmmu
       mips64el-softmmu m68k-softmmu ppc-softmmu riscv64-softmmu sparc-softmmu"
  - make -j2
@@ -16,7 +18,9 @@ build-system2:
  script:
  - apt-get install -y -qq libsdl2-dev libgcrypt-dev libbrlapi-dev libaio-dev
       libfdt-dev liblzo2-dev librdmacm-dev libibverbs-dev libibumad-dev
- - ./configure --enable-werror --target-list="tricore-softmmu unicore32-softmmu
+ - mkdir build
+ - cd build
+ - ../configure --enable-werror --target-list="tricore-softmmu unicore32-softmmu
       microblaze-softmmu mips-softmmu riscv32-softmmu s390x-softmmu sh4-softmmu
       sparc64-softmmu x86_64-softmmu xtensa-softmmu nios2-softmmu or1k-softmmu"
  - make -j2
@@ -24,7 +28,9 @@ build-system2:
 
 build-disabled:
  script:
- - ./configure --enable-werror --disable-rdma --disable-slirp --disable-curl
+ - mkdir build
+ - cd build
+ - ../configure --enable-werror --disable-rdma --disable-slirp --disable-curl
       --disable-capstone --disable-live-block-migration --disable-glusterfs
       --disable-replication --disable-coroutine-pool --disable-smartcard
       --disable-guest-agent --disable-curses --disable-libxml2 --disable-tpm
@@ -37,7 +43,9 @@ build-disabled:
 build-tcg-disabled:
  script:
  - apt-get install -y -qq clang libgtk-3-dev libusb-dev
- - ./configure --cc=clang --enable-werror --disable-tcg --audio-drv-list=""
+ - mkdir build
+ - cd build
+ - ../configure --cc=clang --enable-werror --disable-tcg --audio-drv-list=""
  - make -j2
  - make check-unit
  - make check-qapi-schema
@@ -52,7 +60,9 @@ build-tcg-disabled:
 
 build-user:
  script:
- - ./configure --enable-werror --disable-system --disable-guest-agent
+ - mkdir build
+ - cd build
+ - ../configure --enable-werror --disable-system --disable-guest-agent
                --disable-capstone --disable-slirp --disable-fdt
  - make -j2
  - make run-tcg-tests-i386-linux-user run-tcg-tests-x86_64-linux-user
@@ -61,7 +71,9 @@ build-clang:
  script:
  - apt-get install -y -qq clang libsdl2-dev libattr1-dev libcap-ng-dev
       xfslibs-dev libiscsi-dev libnfs-dev libseccomp-dev gnutls-dev librbd-dev
- - ./configure --cc=clang --cxx=clang++ --enable-werror
+ - mkdir build
+ - cd build
+ - ../configure --cc=clang --cxx=clang++ --enable-werror
       --target-list="alpha-softmmu arm-softmmu m68k-softmmu mips64-softmmu
                      ppc-softmmu s390x-softmmu x86_64-softmmu arm-linux-user"
  - make -j2
@@ -70,7 +82,9 @@ build-clang:
 build-tci:
  script:
  - TARGETS="aarch64 alpha arm hppa m68k microblaze moxie ppc64 s390x x86_64"
- - ./configure --enable-tcg-interpreter
+ - mkdir build
+ - cd build
+ - ../configure --enable-tcg-interpreter
       --target-list="$(for tg in $TARGETS; do echo -n ${tg}'-softmmu '; done)"
  - make -j2
  - make tests/boot-serial-test tests/cdrom-test tests/pxe-test
diff --git a/.shippable.yml b/.shippable.yml
index f74a3de3ffd..83aae08bb4c 100644
--- a/.shippable.yml
+++ b/.shippable.yml
@@ -35,5 +35,7 @@ build:
     options: "-e HOME=/root"
   ci:
     - unset CC
-    - ./configure ${QEMU_CONFIGURE_OPTS} --target-list=${TARGET_LIST}
+    - mkdir build
+    - cd build
+    - ../configure ${QEMU_CONFIGURE_OPTS} --target-list=${TARGET_LIST}
     - make -j$(($(getconf _NPROCESSORS_ONLN) + 1))
diff --git a/.travis.yml b/.travis.yml
index b68566b1fe9..d673ee219e7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -73,8 +73,8 @@ notifications:
 
 env:
   global:
-    - SRC_DIR="."
-    - BUILD_DIR="."
+    - SRC_DIR=".."
+    - BUILD_DIR="build"
     - BASE_CONFIG="--disable-docs --disable-tools"
     - TEST_CMD="make check V=1"
     # This is broadly a list of "mainline" softmmu targets which have support across the major distros
@@ -191,7 +191,8 @@ matrix:
         - CACHE_NAME="${TRAVIS_BRANCH}-linux-clang-sanitize"
       compiler: clang
       before_script:
-        - ./configure ${CONFIG} --extra-cflags="-fsanitize=undefined -Werror" || { cat config.log && exit 1; }
+        - mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR}
+        - ${SRC_DIR}/configure ${CONFIG} --extra-cflags="-fsanitize=undefined -Werror" || { cat config.log && exit 1; }
 
 
     - env:
@@ -323,7 +324,8 @@ matrix:
         - CONFIG="--cc=gcc-9 --cxx=g++-9 --disable-pie --disable-linux-user"
         - TEST_CMD=""
       before_script:
-        - ./configure ${CONFIG} --extra-cflags="-g3 -O0 -Wno-error=stringop-truncation -fsanitize=thread -fuse-ld=gold" || { cat config.log && exit 1; }
+        - mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR}
+        - ${SRC_DIR}/configure ${CONFIG} --extra-cflags="-g3 -O0 -Wno-error=stringop-truncation -fsanitize=thread -fuse-ld=gold" || { cat config.log && exit 1; }
 
 
     # Run check-tcg against linux-user
@@ -460,5 +462,6 @@ matrix:
         - make -C ${SRC_DIR} qemu-${QEMU_VERSION}.tar.bz2
         - ls -l ${SRC_DIR}/qemu-${QEMU_VERSION}.tar.bz2
         - tar -xf ${SRC_DIR}/qemu-${QEMU_VERSION}.tar.bz2 && cd qemu-${QEMU_VERSION}
-        - ./configure ${BASE_CONFIG} ${CONFIG} || { cat config.log && exit 1; }
+        - mkdir -p release-build && cd release-build
+        - ../configure ${BASE_CONFIG} ${CONFIG} || { cat config.log && exit 1; }
         - make install
-- 
2.20.1

[PULL 11/25] Fix double free issue in qemu_set_log_filename().

[Alex Bennée]

From: Robert Foley <robert.foley@linaro.org>

After freeing the logfilename, we set logfilename to NULL, in case of an
error which returns without setting logfilename.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-2-robert.foley@linaro.org>

diff --git a/util/log.c b/util/log.c
index 1ca13059eef..4316fe74eee 100644
--- a/util/log.c
+++ b/util/log.c
@@ -113,6 +113,7 @@ void qemu_set_log_filename(const char *filename, Error **errp)
 {
     char *pidstr;
     g_free(logfilename);
+    logfilename = NULL;
 
     pidstr = strstr(filename, "%");
     if (pidstr) {
-- 
2.20.1

[PULL 12/25] Cleaned up flow of code in qemu_set_log(), to simplify and clarify.

[Alex Bennée]

From: Robert Foley <robert.foley@linaro.org>

Also added some explanation of the reasoning behind the branches.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-3-robert.foley@linaro.org>

diff --git a/util/log.c b/util/log.c
index 4316fe74eee..417d16ec66e 100644
--- a/util/log.c
+++ b/util/log.c
@@ -54,12 +54,25 @@ static bool log_uses_own_buffers;
 /* enable or disable low levels log */
 void qemu_set_log(int log_flags)
 {
+    bool need_to_open_file = false;
     qemu_loglevel = log_flags;
 #ifdef CONFIG_TRACE_LOG
     qemu_loglevel |= LOG_TRACE;
 #endif
-    if (!qemu_logfile &&
-        (is_daemonized() ? logfilename != NULL : qemu_loglevel)) {
+    /*
+     * In all cases we only log if qemu_loglevel is set.
+     * Also:
+     *   If not daemonized we will always log either to stderr
+     *     or to a file (if there is a logfilename).
+     *   If we are daemonized,
+     *     we will only log if there is a logfilename.
+     */
+    if (qemu_loglevel && (!is_daemonized() || logfilename)) {
+        need_to_open_file = true;
+    }
+    if (qemu_logfile && !need_to_open_file) {
+        qemu_log_close();
+    } else if (!qemu_logfile && need_to_open_file) {
         if (logfilename) {
             qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
             if (!qemu_logfile) {
@@ -93,10 +106,6 @@ void qemu_set_log(int log_flags)
             log_append = 1;
         }
     }
-    if (qemu_logfile &&
-        (is_daemonized() ? logfilename == NULL : !qemu_loglevel)) {
-        qemu_log_close();
-    }
 }
 
 void qemu_log_needs_buffers(void)
-- 
2.20.1

[PULL 13/25] Add a mutex to guarantee single writer to qemu_logfile handle.

[Alex Bennée]

From: Robert Foley <robert.foley@linaro.org>

Also added qemu_logfile_init() for initializing the logfile mutex.

Note that inside qemu_set_log() we needed to add a pair of
qemu_mutex_unlock() calls in order to avoid a double lock in
qemu_log_close().  This unavoidable temporary ugliness will be
cleaned up in a later patch in this series.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-4-robert.foley@linaro.org>

diff --git a/util/log.c b/util/log.c
index 417d16ec66e..953a66b5a8d 100644
--- a/util/log.c
+++ b/util/log.c
@@ -24,8 +24,10 @@
 #include "qapi/error.h"
 #include "qemu/cutils.h"
 #include "trace/control.h"
+#include "qemu/thread.h"
 
 static char *logfilename;
+static QemuMutex qemu_logfile_mutex;
 FILE *qemu_logfile;
 int qemu_loglevel;
 static int log_append = 0;
@@ -49,6 +51,11 @@ int qemu_log(const char *fmt, ...)
     return ret;
 }
 
+static void __attribute__((__constructor__)) qemu_logfile_init(void)
+{
+    qemu_mutex_init(&qemu_logfile_mutex);
+}
+
 static bool log_uses_own_buffers;
 
 /* enable or disable low levels log */
@@ -70,7 +77,9 @@ void qemu_set_log(int log_flags)
     if (qemu_loglevel && (!is_daemonized() || logfilename)) {
         need_to_open_file = true;
     }
+    qemu_mutex_lock(&qemu_logfile_mutex);
     if (qemu_logfile && !need_to_open_file) {
+        qemu_mutex_unlock(&qemu_logfile_mutex);
         qemu_log_close();
     } else if (!qemu_logfile && need_to_open_file) {
         if (logfilename) {
@@ -105,6 +114,7 @@ void qemu_set_log(int log_flags)
 #endif
             log_append = 1;
         }
+        qemu_mutex_unlock(&qemu_logfile_mutex);
     }
 }
 
@@ -240,12 +250,14 @@ void qemu_log_flush(void)
 /* Close the log file */
 void qemu_log_close(void)
 {
+    qemu_mutex_lock(&qemu_logfile_mutex);
     if (qemu_logfile) {
         if (qemu_logfile != stderr) {
             fclose(qemu_logfile);
         }
         qemu_logfile = NULL;
     }
+    qemu_mutex_unlock(&qemu_logfile_mutex);
 }
 
 const QEMULogItem qemu_log_items[] = {
-- 
2.20.1

[PULL 14/25] qemu_log_lock/unlock now preserves the qemu_logfile handle.

[Alex Bennée]

From: Robert Foley <robert.foley@linaro.org>

qemu_log_lock() now returns a handle and qemu_log_unlock() receives a
handle to unlock.  This allows for changing the handle during logging
and ensures the lock() and unlock() are for the same file.

Also in target/tilegx/translate.c removed the qemu_log_lock()/unlock()
calls (and the log("\n")), since the translator can longjmp out of the
loop if it attempts to translate an instruction in an inaccessible page.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-5-robert.foley@linaro.org>

diff --git a/include/qemu/log.h b/include/qemu/log.h
index a91105b2adc..a7c5b01571f 100644
--- a/include/qemu/log.h
+++ b/include/qemu/log.h
@@ -53,14 +53,17 @@ static inline bool qemu_log_separate(void)
  * qemu_loglevel is never set when qemu_logfile is unset.
  */
 
-static inline void qemu_log_lock(void)
+static inline FILE *qemu_log_lock(void)
 {
     qemu_flockfile(qemu_logfile);
+    return logfile->fd;
 }
 
-static inline void qemu_log_unlock(void)
+static inline void qemu_log_unlock(FILE *fd)
 {
-    qemu_funlockfile(qemu_logfile);
+    if (fd) {
+        qemu_funlockfile(fd);
+    }
 }
 
 /* Logging functions: */
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index c01f59c7433..62068d10c3c 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -156,7 +156,7 @@ static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, TranslationBlock *itb)
 #if defined(DEBUG_DISAS)
     if (qemu_loglevel_mask(CPU_LOG_TB_CPU)
         && qemu_log_in_addr_range(itb->pc)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         int flags = 0;
         if (qemu_loglevel_mask(CPU_LOG_TB_FPU)) {
             flags |= CPU_DUMP_FPU;
@@ -165,7 +165,7 @@ static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, TranslationBlock *itb)
         flags |= CPU_DUMP_CCOP;
 #endif
         log_cpu_state(cpu, flags);
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif /* DEBUG_DISAS */
 
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 9f48da94721..bb325a2bc44 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -1804,7 +1804,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
 #ifdef DEBUG_DISAS
     if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM) &&
         qemu_log_in_addr_range(tb->pc)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("OUT: [size=%d]\n", gen_code_size);
         if (tcg_ctx->data_gen_ptr) {
             size_t code_size = tcg_ctx->data_gen_ptr - tb->tc.ptr;
@@ -1829,7 +1829,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
         }
         qemu_log("\n");
         qemu_log_flush();
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 
diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c
index f977682be79..603d17ff831 100644
--- a/accel/tcg/translator.c
+++ b/accel/tcg/translator.c
@@ -138,11 +138,11 @@ void translator_loop(const TranslatorOps *ops, DisasContextBase *db,
 #ifdef DEBUG_DISAS
     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
         && qemu_log_in_addr_range(db->pc_first)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("----------------\n");
         ops->disas_log(db, cpu);
         qemu_log("\n");
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 }
diff --git a/exec.c b/exec.c
index a34c3481840..edafdebeecc 100644
--- a/exec.c
+++ b/exec.c
@@ -1225,13 +1225,13 @@ void cpu_abort(CPUState *cpu, const char *fmt, ...)
     fprintf(stderr, "\n");
     cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP);
     if (qemu_log_separate()) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("qemu: fatal: ");
         qemu_log_vprintf(fmt, ap2);
         qemu_log("\n");
         log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP);
         qemu_log_flush();
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
         qemu_log_close();
     }
     va_end(ap2);
diff --git a/hw/net/can/can_sja1000.c b/hw/net/can/can_sja1000.c
index 1f81341554f..39c78faf9b2 100644
--- a/hw/net/can/can_sja1000.c
+++ b/hw/net/can/can_sja1000.c
@@ -247,8 +247,8 @@ int can_sja_accept_filter(CanSJA1000State *s,
 static void can_display_msg(const char *prefix, const qemu_can_frame *msg)
 {
     int i;
+    FILE *logfile = qemu_log_lock();
 
-    qemu_log_lock();
     qemu_log("%s%03X [%01d] %s %s",
              prefix,
              msg->can_id & QEMU_CAN_EFF_MASK,
@@ -261,7 +261,7 @@ static void can_display_msg(const char *prefix, const qemu_can_frame *msg)
     }
     qemu_log("\n");
     qemu_log_flush();
-    qemu_log_unlock();
+    qemu_log_unlock(logfile);
 }
 
 static void buff2frame_pel(const uint8_t *buff, qemu_can_frame *frame)
diff --git a/net/can/can_socketcan.c b/net/can/can_socketcan.c
index 8a6ffad40c8..29bfacd4f8a 100644
--- a/net/can/can_socketcan.c
+++ b/net/can/can_socketcan.c
@@ -76,8 +76,7 @@ QEMU_BUILD_BUG_ON(offsetof(qemu_can_frame, data)
 static void can_host_socketcan_display_msg(struct qemu_can_frame *msg)
 {
     int i;
-
-    qemu_log_lock();
+    FILE *logfile = qemu_log_lock();
     qemu_log("[cansocketcan]: %03X [%01d] %s %s",
              msg->can_id & QEMU_CAN_EFF_MASK,
              msg->can_dlc,
@@ -89,7 +88,7 @@ static void can_host_socketcan_display_msg(struct qemu_can_frame *msg)
     }
     qemu_log("\n");
     qemu_log_flush();
-    qemu_log_unlock();
+    qemu_log_unlock(logfile);
 }
 
 static void can_host_socketcan_read(void *opaque)
diff --git a/target/cris/translate.c b/target/cris/translate.c
index e752bd06093..cb57516a445 100644
--- a/target/cris/translate.c
+++ b/target/cris/translate.c
@@ -3273,11 +3273,11 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
 #if !DISAS_CRIS
     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
         && qemu_log_in_addr_range(pc_start)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("--------------\n");
         qemu_log("IN: %s\n", lookup_symbol(pc_start));
         log_target_disas(cs, pc_start, dc->pc - pc_start);
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 #endif
diff --git a/target/i386/translate.c b/target/i386/translate.c
index 77e932d8276..7c99ef13854 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -2502,14 +2502,15 @@ static void gen_unknown_opcode(CPUX86State *env, DisasContext *s)
     gen_illegal_opcode(s);
 
     if (qemu_loglevel_mask(LOG_UNIMP)) {
+        FILE *logfile = qemu_log_lock();
         target_ulong pc = s->pc_start, end = s->pc;
-        qemu_log_lock();
+
         qemu_log("ILLOPC: " TARGET_FMT_lx ":", pc);
         for (; pc < end; ++pc) {
             qemu_log(" %02x", cpu_ldub_code(env, pc));
         }
         qemu_log("\n");
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 }
 
diff --git a/target/lm32/translate.c b/target/lm32/translate.c
index 778cae1e817..73db9654d66 100644
--- a/target/lm32/translate.c
+++ b/target/lm32/translate.c
@@ -1137,10 +1137,10 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
 #ifdef DEBUG_DISAS
     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
         && qemu_log_in_addr_range(pc_start)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("\n");
         log_target_disas(cs, pc_start, dc->pc - pc_start);
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 }
diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index bdc7d5326a6..525115b0413 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -1765,10 +1765,10 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
 #if !SIM_COMPAT
     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
         && qemu_log_in_addr_range(pc_start)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("--------------\n");
         log_target_disas(cs, pc_start, dc->pc - pc_start);
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 #endif
diff --git a/target/nios2/translate.c b/target/nios2/translate.c
index e17656e66fb..82107bf270f 100644
--- a/target/nios2/translate.c
+++ b/target/nios2/translate.c
@@ -892,11 +892,11 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
 #ifdef DEBUG_DISAS
     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
         && qemu_log_in_addr_range(tb->pc)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("IN: %s\n", lookup_symbol(tb->pc));
         log_target_disas(cs, tb->pc, dc->pc - tb->pc);
         qemu_log("\n");
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 }
diff --git a/target/tilegx/translate.c b/target/tilegx/translate.c
index 68dd4aa2d8e..abce7e1c757 100644
--- a/target/tilegx/translate.c
+++ b/target/tilegx/translate.c
@@ -2388,7 +2388,6 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
     dc->zero = NULL;
 
     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
-        qemu_log_lock();
         qemu_log("IN: %s\n", lookup_symbol(pc_start));
     }
     gen_tb_start(tb);
@@ -2417,11 +2416,6 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
     gen_tb_end(tb, num_insns);
     tb->size = dc->pc - pc_start;
     tb->icount = num_insns;
-
-    if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
-        qemu_log("\n");
-        qemu_log_unlock();
-    }
 }
 
 void restore_state_to_opc(CPUTLGState *env, TranslationBlock *tb,
diff --git a/target/unicore32/translate.c b/target/unicore32/translate.c
index 0e01f35856f..0f6891b8aa3 100644
--- a/target/unicore32/translate.c
+++ b/target/unicore32/translate.c
@@ -1994,12 +1994,12 @@ done_generating:
 #ifdef DEBUG_DISAS
     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
         && qemu_log_in_addr_range(pc_start)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("----------------\n");
         qemu_log("IN: %s\n", lookup_symbol(pc_start));
         log_target_disas(cs, pc_start, dc->pc - pc_start);
         qemu_log("\n");
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
     tb->size = dc->pc - pc_start;
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 5475d49ed11..0511266d85d 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1085,7 +1085,7 @@ void tcg_prologue_init(TCGContext *s)
 
 #ifdef DEBUG_DISAS
     if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("PROLOGUE: [size=%zu]\n", prologue_size);
         if (s->data_gen_ptr) {
             size_t code_size = s->data_gen_ptr - buf0;
@@ -1110,7 +1110,7 @@ void tcg_prologue_init(TCGContext *s)
         }
         qemu_log("\n");
         qemu_log_flush();
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 
@@ -4041,11 +4041,11 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
 #ifdef DEBUG_DISAS
     if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)
                  && qemu_log_in_addr_range(tb->pc))) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("OP:\n");
         tcg_dump_ops(s, false);
         qemu_log("\n");
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 
@@ -4086,11 +4086,11 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
 #ifdef DEBUG_DISAS
         if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP_IND)
                      && qemu_log_in_addr_range(tb->pc))) {
-            qemu_log_lock();
+            FILE *logfile = qemu_log_lock();
             qemu_log("OP before indirect lowering:\n");
             tcg_dump_ops(s, false);
             qemu_log("\n");
-            qemu_log_unlock();
+            qemu_log_unlock(logfile);
         }
 #endif
         /* Replace indirect temps with direct temps.  */
@@ -4107,11 +4107,11 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
 #ifdef DEBUG_DISAS
     if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP_OPT)
                  && qemu_log_in_addr_range(tb->pc))) {
-        qemu_log_lock();
+        FILE *logfile = qemu_log_lock();
         qemu_log("OP after optimization and liveness analysis:\n");
         tcg_dump_ops(s, true);
         qemu_log("\n");
-        qemu_log_unlock();
+        qemu_log_unlock(logfile);
     }
 #endif
 
-- 
2.20.1

[PULL 15/25] Add use of RCU for qemu_logfile.

[Alex Bennée]

From: Robert Foley <robert.foley@linaro.org>

This now allows changing the logfile while logging is active,
and also solves the issue of a seg fault while changing the logfile.

Any read access to the qemu_logfile handle will use
the rcu_read_lock()/unlock() around the use of the handle.
To fetch the handle we will use atomic_rcu_read().
We also in many cases do a check for validity of the
logfile handle before using it to deal with the case where the
file is closed and set to NULL.

The cases where we write to the qemu_logfile will use atomic_rcu_set().
Writers will also use call_rcu() with a newly added qemu_logfile_free
function for freeing/closing when readers have finished.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-6-robert.foley@linaro.org>

diff --git a/include/exec/log.h b/include/exec/log.h
index e2cfd436e61..9bd1e4aa20b 100644
--- a/include/exec/log.h
+++ b/include/exec/log.h
@@ -15,8 +15,15 @@
  */
 static inline void log_cpu_state(CPUState *cpu, int flags)
 {
+    QemuLogFile *logfile;
+
     if (qemu_log_enabled()) {
-        cpu_dump_state(cpu, qemu_logfile, flags);
+        rcu_read_lock();
+        logfile = atomic_rcu_read(&qemu_logfile);
+        if (logfile) {
+            cpu_dump_state(cpu, logfile->fd, flags);
+        }
+        rcu_read_unlock();
     }
 }
 
@@ -40,19 +47,37 @@ static inline void log_cpu_state_mask(int mask, CPUState *cpu, int flags)
 static inline void log_target_disas(CPUState *cpu, target_ulong start,
                                     target_ulong len)
 {
-    target_disas(qemu_logfile, cpu, start, len);
+    QemuLogFile *logfile;
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
+        target_disas(logfile->fd, cpu, start, len);
+    }
+    rcu_read_unlock();
 }
 
 static inline void log_disas(void *code, unsigned long size)
 {
-    disas(qemu_logfile, code, size);
+    QemuLogFile *logfile;
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
+        disas(logfile->fd, code, size);
+    }
+    rcu_read_unlock();
 }
 
 #if defined(CONFIG_USER_ONLY)
 /* page_dump() output to the log file: */
 static inline void log_page_dump(void)
 {
-    page_dump(qemu_logfile);
+    QemuLogFile *logfile;
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
+        page_dump(logfile->fd);
+    }
+    rcu_read_unlock();
 }
 #endif
 #endif
diff --git a/include/qemu/log.h b/include/qemu/log.h
index a7c5b01571f..e0f4e406283 100644
--- a/include/qemu/log.h
+++ b/include/qemu/log.h
@@ -3,9 +3,16 @@
 
 /* A small part of this API is split into its own header */
 #include "qemu/log-for-trace.h"
+#include "qemu/rcu.h"
+
+typedef struct QemuLogFile {
+    struct rcu_head rcu;
+    FILE *fd;
+} QemuLogFile;
 
 /* Private global variable, don't use */
-extern FILE *qemu_logfile;
+extern QemuLogFile *qemu_logfile;
+
 
 /* 
  * The new API:
@@ -25,7 +32,16 @@ static inline bool qemu_log_enabled(void)
  */
 static inline bool qemu_log_separate(void)
 {
-    return qemu_logfile != NULL && qemu_logfile != stderr;
+    QemuLogFile *logfile;
+    bool res = false;
+
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile && logfile->fd != stderr) {
+        res = true;
+    }
+    rcu_read_unlock();
+    return res;
 }
 
 #define CPU_LOG_TB_OUT_ASM (1 << 0)
@@ -55,8 +71,15 @@ static inline bool qemu_log_separate(void)
 
 static inline FILE *qemu_log_lock(void)
 {
-    qemu_flockfile(qemu_logfile);
-    return logfile->fd;
+    QemuLogFile *logfile;
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
+        qemu_flockfile(logfile->fd);
+        return logfile->fd;
+    } else {
+        return NULL;
+    }
 }
 
 static inline void qemu_log_unlock(FILE *fd)
@@ -64,6 +87,7 @@ static inline void qemu_log_unlock(FILE *fd)
     if (fd) {
         qemu_funlockfile(fd);
     }
+    rcu_read_unlock();
 }
 
 /* Logging functions: */
@@ -73,9 +97,14 @@ static inline void qemu_log_unlock(FILE *fd)
 static inline void GCC_FMT_ATTR(1, 0)
 qemu_log_vprintf(const char *fmt, va_list va)
 {
-    if (qemu_logfile) {
-        vfprintf(qemu_logfile, fmt, va);
+    QemuLogFile *logfile;
+
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
+        vfprintf(logfile->fd, fmt, va);
     }
+    rcu_read_unlock();
 }
 
 /* log only if a bit is set on the current loglevel mask:
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 0511266d85d..4f616ba38bf 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2114,9 +2114,17 @@ static void tcg_dump_ops(TCGContext *s, bool have_prefs)
         }
 
         if (have_prefs || op->life) {
-            for (; col < 40; ++col) {
-                putc(' ', qemu_logfile);
+
+            QemuLogFile *logfile;
+
+            rcu_read_lock();
+            logfile = atomic_rcu_read(&qemu_logfile);
+            if (logfile) {
+                for (; col < 40; ++col) {
+                    putc(' ', logfile->fd);
+                }
             }
+            rcu_read_unlock();
         }
 
         if (op->life) {
diff --git a/util/log.c b/util/log.c
index 953a66b5a8d..867264da8d0 100644
--- a/util/log.c
+++ b/util/log.c
@@ -28,7 +28,7 @@
 
 static char *logfilename;
 static QemuMutex qemu_logfile_mutex;
-FILE *qemu_logfile;
+QemuLogFile *qemu_logfile;
 int qemu_loglevel;
 static int log_append = 0;
 static GArray *debug_regions;
@@ -37,10 +37,14 @@ static GArray *debug_regions;
 int qemu_log(const char *fmt, ...)
 {
     int ret = 0;
-    if (qemu_logfile) {
+    QemuLogFile *logfile;
+
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
         va_list ap;
         va_start(ap, fmt);
-        ret = vfprintf(qemu_logfile, fmt, ap);
+        ret = vfprintf(logfile->fd, fmt, ap);
         va_end(ap);
 
         /* Don't pass back error results.  */
@@ -48,6 +52,7 @@ int qemu_log(const char *fmt, ...)
             ret = 0;
         }
     }
+    rcu_read_unlock();
     return ret;
 }
 
@@ -56,12 +61,24 @@ static void __attribute__((__constructor__)) qemu_logfile_init(void)
     qemu_mutex_init(&qemu_logfile_mutex);
 }
 
+static void qemu_logfile_free(QemuLogFile *logfile)
+{
+    g_assert(logfile);
+
+    if (logfile->fd != stderr) {
+        fclose(logfile->fd);
+    }
+    g_free(logfile);
+}
+
 static bool log_uses_own_buffers;
 
 /* enable or disable low levels log */
 void qemu_set_log(int log_flags)
 {
     bool need_to_open_file = false;
+    QemuLogFile *logfile;
+
     qemu_loglevel = log_flags;
 #ifdef CONFIG_TRACE_LOG
     qemu_loglevel |= LOG_TRACE;
@@ -79,43 +96,47 @@ void qemu_set_log(int log_flags)
     }
     qemu_mutex_lock(&qemu_logfile_mutex);
     if (qemu_logfile && !need_to_open_file) {
-        qemu_mutex_unlock(&qemu_logfile_mutex);
-        qemu_log_close();
+        logfile = qemu_logfile;
+        atomic_rcu_set(&qemu_logfile, NULL);
+        call_rcu(logfile, qemu_logfile_free, rcu);
     } else if (!qemu_logfile && need_to_open_file) {
+        logfile = g_new0(QemuLogFile, 1);
         if (logfilename) {
-            qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
-            if (!qemu_logfile) {
+            logfile->fd = fopen(logfilename, log_append ? "a" : "w");
+            if (!logfile->fd) {
+                g_free(logfile);
                 perror(logfilename);
                 _exit(1);
             }
             /* In case we are a daemon redirect stderr to logfile */
             if (is_daemonized()) {
-                dup2(fileno(qemu_logfile), STDERR_FILENO);
-                fclose(qemu_logfile);
+                dup2(fileno(logfile->fd), STDERR_FILENO);
+                fclose(logfile->fd);
                 /* This will skip closing logfile in qemu_log_close() */
-                qemu_logfile = stderr;
+                logfile->fd = stderr;
             }
         } else {
             /* Default to stderr if no log file specified */
             assert(!is_daemonized());
-            qemu_logfile = stderr;
+            logfile->fd = stderr;
         }
         /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
         if (log_uses_own_buffers) {
             static char logfile_buf[4096];
 
-            setvbuf(qemu_logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
+            setvbuf(logfile->fd, logfile_buf, _IOLBF, sizeof(logfile_buf));
         } else {
 #if defined(_WIN32)
             /* Win32 doesn't support line-buffering, so use unbuffered output. */
-            setvbuf(qemu_logfile, NULL, _IONBF, 0);
+            setvbuf(logfile->fd, NULL, _IONBF, 0);
 #else
-            setvbuf(qemu_logfile, NULL, _IOLBF, 0);
+            setvbuf(logfile->fd, NULL, _IOLBF, 0);
 #endif
             log_append = 1;
         }
-        qemu_mutex_unlock(&qemu_logfile_mutex);
+        atomic_rcu_set(&qemu_logfile, logfile);
     }
+    qemu_mutex_unlock(&qemu_logfile_mutex);
 }
 
 void qemu_log_needs_buffers(void)
@@ -244,18 +265,27 @@ out:
 /* fflush() the log file */
 void qemu_log_flush(void)
 {
-    fflush(qemu_logfile);
+    QemuLogFile *logfile;
+
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
+        fflush(logfile->fd);
+    }
+    rcu_read_unlock();
 }
 
 /* Close the log file */
 void qemu_log_close(void)
 {
+    QemuLogFile *logfile;
+
     qemu_mutex_lock(&qemu_logfile_mutex);
-    if (qemu_logfile) {
-        if (qemu_logfile != stderr) {
-            fclose(qemu_logfile);
-        }
-        qemu_logfile = NULL;
+    logfile = qemu_logfile;
+
+    if (logfile) {
+        atomic_rcu_set(&qemu_logfile, NULL);
+        call_rcu(logfile, qemu_logfile_free, rcu);
     }
     qemu_mutex_unlock(&qemu_logfile_mutex);
 }
-- 
2.20.1

[PULL 16/25] Added tests for close and change of logfile.

[Alex Bennée]

From: Robert Foley <robert.foley@linaro.org>

One test ensures that the logfile handle is still valid even if
the logfile is changed during logging.
The other test validates that the logfile handle remains valid under
the logfile lock even if the logfile is closed.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-7-robert.foley@linaro.org>

diff --git a/tests/test-logging.c b/tests/test-logging.c
index a12585f70af..1e646f045dc 100644
--- a/tests/test-logging.c
+++ b/tests/test-logging.c
@@ -108,6 +108,82 @@ static void test_parse_path(gconstpointer data)
     error_free_or_abort(&err);
 }
 
+static void test_logfile_write(gconstpointer data)
+{
+    QemuLogFile *logfile;
+    QemuLogFile *logfile2;
+    gchar const *dir = data;
+    Error *err = NULL;
+    g_autofree gchar *file_path;
+    g_autofree gchar *file_path1;
+    FILE *orig_fd;
+
+    /*
+     * Before starting test, set log flags, to ensure the file gets
+     * opened below with the call to qemu_set_log_filename().
+     * In cases where a logging backend other than log is used,
+     * this is needed.
+     */
+    qemu_set_log(CPU_LOG_TB_OUT_ASM);
+    file_path = g_build_filename(dir, "qemu_test_log_write0.log", NULL);
+    file_path1 = g_build_filename(dir, "qemu_test_log_write1.log", NULL);
+
+    /*
+     * Test that even if an open file handle is changed,
+     * our handle remains valid due to RCU.
+     */
+    qemu_set_log_filename(file_path, &err);
+    g_assert(!err);
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    orig_fd = logfile->fd;
+    g_assert(logfile && logfile->fd);
+    fprintf(logfile->fd, "%s 1st write to file\n", __func__);
+    fflush(logfile->fd);
+
+    /* Change the logfile and ensure that the handle is still valid. */
+    qemu_set_log_filename(file_path1, &err);
+    g_assert(!err);
+    logfile2 = atomic_rcu_read(&qemu_logfile);
+    g_assert(logfile->fd == orig_fd);
+    g_assert(logfile2->fd != logfile->fd);
+    fprintf(logfile->fd, "%s 2nd write to file\n", __func__);
+    fflush(logfile->fd);
+    rcu_read_unlock();
+}
+
+static void test_logfile_lock(gconstpointer data)
+{
+    FILE *logfile;
+    gchar const *dir = data;
+    Error *err = NULL;
+    g_autofree gchar *file_path;
+
+    file_path = g_build_filename(dir, "qemu_test_logfile_lock0.log", NULL);
+
+    /*
+     * Test the use of the logfile lock, such
+     * that even if an open file handle is closed,
+     * our handle remains valid for use due to RCU.
+     */
+    qemu_set_log_filename(file_path, &err);
+    logfile = qemu_log_lock();
+    g_assert(logfile);
+    fprintf(logfile, "%s 1st write to file\n", __func__);
+    fflush(logfile);
+
+    /*
+     * Initiate a close file and make sure our handle remains
+     * valid since we still have the logfile lock.
+     */
+    qemu_log_close();
+    fprintf(logfile, "%s 2nd write to file\n", __func__);
+    fflush(logfile);
+    qemu_log_unlock(logfile);
+
+    g_assert(!err);
+}
+
 /* Remove a directory and all its entries (non-recursive). */
 static void rmdir_full(gchar const *root)
 {
@@ -134,6 +210,10 @@ int main(int argc, char **argv)
 
     g_test_add_func("/logging/parse_range", test_parse_range);
     g_test_add_data_func("/logging/parse_path", tmp_path, test_parse_path);
+    g_test_add_data_func("/logging/logfile_write_path",
+                         tmp_path, test_logfile_write);
+    g_test_add_data_func("/logging/logfile_lock_path",
+                         tmp_path, test_logfile_lock);
 
     rc = g_test_run();
 
-- 
2.20.1

[PULL 17/25] docker: gtester is no longer used

[Alex Bennée]

From: Paolo Bonzini <pbonzini@redhat.com>

We are using tap-driver.pl, do not require anymore gtester to be installed
to run the testsuite in docker-based tests.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <1576632611-55032-1-git-send-email-pbonzini@redhat.com>

diff --git a/tests/docker/common.rc b/tests/docker/common.rc
index 512202b0a19..02cd67a8c5e 100755
--- a/tests/docker/common.rc
+++ b/tests/docker/common.rc
@@ -53,12 +53,7 @@ check_qemu()
         INVOCATION="$@"
     fi
 
-    if command -v gtester > /dev/null 2>&1 && \
-           gtester --version > /dev/null 2>&1; then
-        make $MAKEFLAGS $INVOCATION
-    else
-        echo "No working gtester, skipping make $INVOCATION"
-    fi
+    make $MAKEFLAGS $INVOCATION
 }
 
 test_fail()
-- 
2.20.1

[PULL 18/25] travis.yml: Remove the redundant clang-with-MAIN_SOFTMMU_TARGETS entry

[Alex Bennée]

From: Thomas Huth <thuth@redhat.com>

We test clang with the MAIN_SOFTMMU_TARGETS twice, once without
sanitizers and once with sanitizers enabled. That's somewhat redundant
since if compilation and tests succeeded with sanitizers enabled, it
should also work fine without sanitizers. Thus remove the clang entry
without sanitizers to speed up the CI testing a little bit.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191119092147.4260-1-thuth@redhat.com>

diff --git a/.travis.yml b/.travis.yml
index d673ee219e7..376b7d6dfa8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -180,12 +180,6 @@ matrix:
       compiler: clang
 
 
-    - env:
-        - CONFIG="--disable-user --target-list=${MAIN_SOFTMMU_TARGETS}"
-        - CACHE_NAME="${TRAVIS_BRANCH}-linux-clang-default"
-      compiler: clang
-
-
     - env:
         - CONFIG="--target-list=${MAIN_SOFTMMU_TARGETS} "
         - CACHE_NAME="${TRAVIS_BRANCH}-linux-clang-sanitize"
-- 
2.20.1

[PULL 19/25] linux-user: convert target_mprotect debug to tracepoint

[Alex Bennée]

It is a pain to re-compile when you need to debug and tracepoints are
a fairly low impact way to instrument QEMU.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191205122518.10010-2-alex.bennee@linaro.org>

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 46a6e3a761a..26a83e74069 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -17,7 +17,7 @@
  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 #include "qemu/osdep.h"
-
+#include "trace.h"
 #include "qemu.h"
 
 //#define DEBUG_MMAP
@@ -66,13 +66,7 @@ int target_mprotect(abi_ulong start, abi_ulong len, int prot)
     abi_ulong end, host_start, host_end, addr;
     int prot1, ret;
 
-#ifdef DEBUG_MMAP
-    printf("mprotect: start=0x" TARGET_ABI_FMT_lx
-           "len=0x" TARGET_ABI_FMT_lx " prot=%c%c%c\n", start, len,
-           prot & PROT_READ ? 'r' : '-',
-           prot & PROT_WRITE ? 'w' : '-',
-           prot & PROT_EXEC ? 'x' : '-');
-#endif
+    trace_target_mprotect(start, len, prot);
 
     if ((start & ~TARGET_PAGE_MASK) != 0)
         return -TARGET_EINVAL;
diff --git a/linux-user/trace-events b/linux-user/trace-events
index 6df234bbb67..8419243de4e 100644
--- a/linux-user/trace-events
+++ b/linux-user/trace-events
@@ -11,3 +11,6 @@ user_handle_signal(void *env, int target_sig) "env=%p signal %d"
 user_host_signal(void *env, int host_sig, int target_sig) "env=%p signal %d (target %d("
 user_queue_signal(void *env, int target_sig) "env=%p signal %d"
 user_s390x_restore_sigregs(void *env, uint64_t sc_psw_addr, uint64_t env_psw_addr) "env=%p frame psw.addr 0x%"PRIx64 " current psw.addr 0x%"PRIx64
+
+# mmap.c
+target_mprotect(uint64_t start, uint64_t len, int flags) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x"
-- 
2.20.1

[PULL 20/25] linux-user: convert target_mmap debug to tracepoint

[Alex Bennée]

It is a pain to re-compile when you need to debug and tracepoints are
a fairly low impact way to instrument QEMU.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191205122518.10010-3-alex.bennee@linaro.org>

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 26a83e74069..f4f10deaeac 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -363,32 +363,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
     abi_ulong ret, end, real_start, real_end, retaddr, host_offset, host_len;
 
     mmap_lock();
-#ifdef DEBUG_MMAP
-    {
-        printf("mmap: start=0x" TARGET_ABI_FMT_lx
-               " len=0x" TARGET_ABI_FMT_lx " prot=%c%c%c flags=",
-               start, len,
-               prot & PROT_READ ? 'r' : '-',
-               prot & PROT_WRITE ? 'w' : '-',
-               prot & PROT_EXEC ? 'x' : '-');
-        if (flags & MAP_FIXED)
-            printf("MAP_FIXED ");
-        if (flags & MAP_ANONYMOUS)
-            printf("MAP_ANON ");
-        switch(flags & MAP_TYPE) {
-        case MAP_PRIVATE:
-            printf("MAP_PRIVATE ");
-            break;
-        case MAP_SHARED:
-            printf("MAP_SHARED ");
-            break;
-        default:
-            printf("[MAP_TYPE=0x%x] ", flags & MAP_TYPE);
-            break;
-        }
-        printf("fd=%d offset=" TARGET_ABI_FMT_lx "\n", fd, offset);
-    }
-#endif
+    trace_target_mmap(start, len, prot, flags, fd, offset);
 
     if (!len) {
         errno = EINVAL;
diff --git a/linux-user/trace-events b/linux-user/trace-events
index 8419243de4e..8d8d4c3c68c 100644
--- a/linux-user/trace-events
+++ b/linux-user/trace-events
@@ -14,3 +14,4 @@ user_s390x_restore_sigregs(void *env, uint64_t sc_psw_addr, uint64_t env_psw_add
 
 # mmap.c
 target_mprotect(uint64_t start, uint64_t len, int flags) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x"
+target_mmap(uint64_t start, uint64_t len, int pflags, int mflags, int fd, uint64_t offset) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x flags=0x%x fd=%d offset=0x%"PRIx64
-- 
2.20.1

[PULL 21/25] linux-user: add target_mmap_complete tracepoint

[Alex Bennée]

For full details we also want to see where the mmaps end up.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191205122518.10010-4-alex.bennee@linaro.org>

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index f4f10deaeac..0b1b43ac3c0 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -538,8 +538,8 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
  the_end1:
     page_set_flags(start, start + len, prot | PAGE_VALID);
  the_end:
+    trace_target_mmap_complete(start);
 #ifdef DEBUG_MMAP
-    printf("ret=0x" TARGET_ABI_FMT_lx "\n", start);
     page_dump(stdout);
     printf("\n");
 #endif
diff --git a/linux-user/trace-events b/linux-user/trace-events
index 8d8d4c3c68c..6d6aeef7b52 100644
--- a/linux-user/trace-events
+++ b/linux-user/trace-events
@@ -15,3 +15,4 @@ user_s390x_restore_sigregs(void *env, uint64_t sc_psw_addr, uint64_t env_psw_add
 # mmap.c
 target_mprotect(uint64_t start, uint64_t len, int flags) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x"
 target_mmap(uint64_t start, uint64_t len, int pflags, int mflags, int fd, uint64_t offset) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x flags=0x%x fd=%d offset=0x%"PRIx64
+target_mmap_complete(uint64_t retaddr) "retaddr=0x%"PRIx64
-- 
2.20.1

[PULL 22/25] linux-user: log page table changes under -d page

[Alex Bennée]

The CPU_LOG_PAGE flag is woefully underused and could stand to do
extra duty tracking page changes. If the user doesn't want to see the
details as things change they still have the tracepoints available.

We push the locking into log_page_dump and pass a reason for the
banner text.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191205122518.10010-5-alex.bennee@linaro.org>

diff --git a/include/exec/log.h b/include/exec/log.h
index 9bd1e4aa20b..fcc7b9e00ba 100644
--- a/include/exec/log.h
+++ b/include/exec/log.h
@@ -69,15 +69,14 @@ static inline void log_disas(void *code, unsigned long size)
 
 #if defined(CONFIG_USER_ONLY)
 /* page_dump() output to the log file: */
-static inline void log_page_dump(void)
+static inline void log_page_dump(const char *operation)
 {
-    QemuLogFile *logfile;
-    rcu_read_lock();
-    logfile = atomic_rcu_read(&qemu_logfile);
+    FILE *logfile = qemu_log_lock();
     if (logfile) {
-        page_dump(logfile->fd);
+        qemu_log("page layout changed following %s\n", operation);
+        page_dump(logfile);
     }
-    rcu_read_unlock();
+    qemu_log_unlock(logfile);
 }
 #endif
 #endif
diff --git a/bsd-user/main.c b/bsd-user/main.c
index 470a8bf79ed..7f4e3cd6271 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -963,7 +963,7 @@ int main(int argc, char **argv)
 
     if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
         qemu_log("guest_base  0x%lx\n", guest_base);
-        log_page_dump();
+        log_page_dump("binary load");
 
         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
diff --git a/linux-user/main.c b/linux-user/main.c
index 6ff7851e86f..8718d03ee21 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -826,7 +826,7 @@ int main(int argc, char **argv, char **envp)
 
     if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
         qemu_log("guest_base  0x%lx\n", guest_base);
-        log_page_dump();
+        log_page_dump("binary load");
 
         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 0b1b43ac3c0..3d90fa459ca 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -18,6 +18,7 @@
  */
 #include "qemu/osdep.h"
 #include "trace.h"
+#include "exec/log.h"
 #include "qemu.h"
 
 //#define DEBUG_MMAP
@@ -539,10 +540,9 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
     page_set_flags(start, start + len, prot | PAGE_VALID);
  the_end:
     trace_target_mmap_complete(start);
-#ifdef DEBUG_MMAP
-    page_dump(stdout);
-    printf("\n");
-#endif
+    if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
+        log_page_dump(__func__);
+    }
     tb_invalidate_phys_range(start, start + len);
     mmap_unlock();
     return start;
-- 
2.20.1

[PULL 23/25] linux-user: convert target_munmap debug to a tracepoint

[Alex Bennée]

Convert the final bit of DEBUG_MMAP to a tracepoint and remove the
last remanents of the #ifdef hackery.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191205122518.10010-6-alex.bennee@linaro.org>

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 3d90fa459ca..8685f02e7e9 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -21,8 +21,6 @@
 #include "exec/log.h"
 #include "qemu.h"
 
-//#define DEBUG_MMAP
-
 static pthread_mutex_t mmap_mutex = PTHREAD_MUTEX_INITIALIZER;
 static __thread int mmap_lock_count;
 
@@ -597,11 +595,8 @@ int target_munmap(abi_ulong start, abi_ulong len)
     abi_ulong end, real_start, real_end, addr;
     int prot, ret;
 
-#ifdef DEBUG_MMAP
-    printf("munmap: start=0x" TARGET_ABI_FMT_lx " len=0x"
-           TARGET_ABI_FMT_lx "\n",
-           start, len);
-#endif
+    trace_target_munmap(start, len);
+
     if (start & ~TARGET_PAGE_MASK)
         return -TARGET_EINVAL;
     len = TARGET_PAGE_ALIGN(len);
diff --git a/linux-user/trace-events b/linux-user/trace-events
index 6d6aeef7b52..f6de1b8befc 100644
--- a/linux-user/trace-events
+++ b/linux-user/trace-events
@@ -16,3 +16,4 @@ user_s390x_restore_sigregs(void *env, uint64_t sc_psw_addr, uint64_t env_psw_add
 target_mprotect(uint64_t start, uint64_t len, int flags) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x"
 target_mmap(uint64_t start, uint64_t len, int pflags, int mflags, int fd, uint64_t offset) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x flags=0x%x fd=%d offset=0x%"PRIx64
 target_mmap_complete(uint64_t retaddr) "retaddr=0x%"PRIx64
+target_munmap(uint64_t start, uint64_t len) "start=0x%"PRIx64" len=0x%"PRIx64
-- 
2.20.1

[PULL 24/25] trace: replace hand-crafted pattern_glob with g_pattern_match_simple

[Alex Bennée]

We already use g_pattern_match elsewhere so remove the duplication.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20191205122518.10010-7-alex.bennee@linaro.org>

diff --git a/trace/control.c b/trace/control.c
index d9cafc161bb..0fb81241607 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -98,38 +98,6 @@ TraceEvent *trace_event_name(const char *name)
     return NULL;
 }
 
-static bool pattern_glob(const char *pat, const char *ev)
-{
-    while (*pat != '\0' && *ev != '\0') {
-        if (*pat == *ev) {
-            pat++;
-            ev++;
-        }
-        else if (*pat == '*') {
-            if (pattern_glob(pat, ev+1)) {
-                return true;
-            } else if (pattern_glob(pat+1, ev)) {
-                return true;
-            } else {
-                return false;
-            }
-        } else {
-            return false;
-        }
-    }
-
-    while (*pat == '*') {
-        pat++;
-    }
-
-    if (*pat == '\0' && *ev == '\0') {
-        return true;
-    } else {
-        return false;
-    }
-}
-
-
 void trace_event_iter_init(TraceEventIter *iter, const char *pattern)
 {
     iter->event = 0;
@@ -148,8 +116,7 @@ TraceEvent *trace_event_iter_next(TraceEventIter *iter)
             iter->group++;
         }
         if (!iter->pattern ||
-            pattern_glob(iter->pattern,
-                         trace_event_get_name(ev))) {
+            g_pattern_match_simple(iter->pattern, trace_event_get_name(ev))) {
             return ev;
         }
     }
-- 
2.20.1

[PULL 25/25] tests/tcg: ensure we re-configure if configure.sh is updated

[Alex Bennée]

We were only doing this if docker was enabled which isn't quite right.

Fixes: fc76c56d3f47
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20191211170520.7747-17-alex.bennee@linaro.org>

diff --git a/tests/tcg/Makefile.prereqs b/tests/tcg/Makefile.prereqs
index 7494b31b952..9a29604a839 100644
--- a/tests/tcg/Makefile.prereqs
+++ b/tests/tcg/Makefile.prereqs
@@ -13,6 +13,6 @@ DOCKER_IMAGE:=
 
 ifneq ($(DOCKER_IMAGE),)
 build-tcg-tests-$(PROBE_TARGET): docker-image-$(DOCKER_IMAGE)
+endif
 $(BUILD_DIR)/tests/tcg/config_$(PROBE_TARGET).mak: config-host.mak
 config-host.mak: $(SRC_PATH)/tests/tcg/configure.sh
-endif
-- 
2.20.1

Re: [PULL 00/25] testing and logging updates

[Peter Maydell]

On Thu, 19 Dec 2019 at 10:49, Alex Bennée <alex.bennee@linaro.org> wrote:
>
> The following changes since commit aceeaa69d28e6f08a24395d0aa6915b687d0a681:
>
>   Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2019-12-17' into staging (2019-12-17 15:55:20 +0000)
>
> are available in the Git repository at:
>
>   https://github.com/stsquad/qemu.git tags/pull-tesing-and-misc-191219-1
>
> for you to fetch changes up to 380976f40f909b735acb60d5d424de7eb1b7107e:
>
>   tests/tcg: ensure we re-configure if configure.sh is updated (2019-12-19 08:20:16 +0000)
>
> ----------------------------------------------------------------
> Various testing and logging updates
>
>   - test tci with Travis
>   - enable multiarch testing in Travis
>   - default to out-of-tree builds
>   - make changing logfile safe via RCU
>   - remove redundant tests
>   - remove gtester test from docker
>   - convert DEBUG_MMAP to tracepoints
>   - remove hand rolled glob function
>   - trigger tcg re-configure when needed
>


Applied, thanks.

Please update the changelog at https://wiki.qemu.org/ChangeLog/5.0
for any user-visible changes.

-- PMM