[igt-dev] [PATCH v2 i-g-t 0/2] Fix some GCC warnings

[igt-dev] [PATCH v2 i-g-t 0/2] Fix some GCC warnings

[Rodrigo Siqueira]

During the compilation, some GCC (8.1) warnings are shown. This patchset
address some of the warnings problems.

Changes since v2:
 - Reduce the total amount of bytes allocated during command handling
   operation
 - Remove unnecessary memset operation
 - Improved commit message

Rodrigo Siqueira (2):
  Make string commands dynamic allocate
  Fix truncate string in the snprintf

 tools/intel_gvtg_test.c | 25 ++++++++++++++++---------
 tools/intel_reg.c       |  2 +-
 2 files changed, 17 insertions(+), 10 deletions(-)

-- 
2.17.0

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[Intel-gfx] [PATCH v2 i-g-t 1/2] Make string commands dynamic allocate

[Rodrigo Siqueira]

This patch fix the following GCC warning:

intel_gvtg_test.c: In function ‘create_guest’:
intel_gvtg_test.c:127:50: warning: ‘%s’ directive writing up to 4095
bytes into a region of size 4077 [-Wformat-overflow=]
[..]
intel_gvtg_test.c:127:5: note: ‘sprintf’ output between 36 and 8226
bytes into a destination of size 4096
[..]

This patch changes the approach for allocating memory to handle QEMU
commands by dynamically allocate space to save the whole command.

Changes since v1:
 Arkadiusz Hiler:
 - Remove overkill allocation for handling commands
 - Remove unnecessary use of memset

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
---
 tools/intel_gvtg_test.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/tools/intel_gvtg_test.c b/tools/intel_gvtg_test.c
index 659b7956..ad5ee6a6 100644
--- a/tools/intel_gvtg_test.c
+++ b/tools/intel_gvtg_test.c
@@ -120,16 +120,23 @@ static int check_tools(void)
 
 static void create_guest(void)
 {
-    char create_qcow_cmd[PATH_MAX] = {0};
-    char create_vgpu_cmd[PATH_MAX] = {0};
-    char create_instance_cmd[PATH_MAX] = {0};
+    unsigned int max_size_cmd = 4 * PATH_MAX;
+    char *command;
 
-    sprintf(create_qcow_cmd, "qemu-img create -b %s -f qcow2 %s.qcow2",
+    command = malloc(max_size_cmd);
+    if (!command)
+        return;
+
+    sprintf(command, "qemu-img create -b %s -f qcow2 %s.qcow2",
             hda_path, hda_path);
-    sprintf(create_vgpu_cmd, "echo \"%s\" > /sys/bus/pci/devices/0000:00:02.0/"
+    igt_assert_eq(system(command), 0);
+
+    sprintf(command, "echo \"%s\" > /sys/bus/pci/devices/0000:00:02.0/"
            "mdev_supported_types/$(ls /sys/bus/pci/devices/0000:00:02.0/"
            "mdev_supported_types |awk {'print $1'}|tail -1)/create", uuid);
-    sprintf(create_instance_cmd, "%s -m 2048 -smp 2 -M pc -name gvtg_guest"
+    igt_assert_eq(system(command), 0);
+
+    sprintf(command, "%s -m 2048 -smp 2 -M pc -name gvtg_guest"
            " -hda %s.qcow2 -bios %s -enable-kvm --net nic,macaddr=%s -net"
            " tap,script=/etc/qemu-ifup -vga cirrus -k en-us"
            " -serial stdio -vnc :1 -machine kernel_irqchip=on -global"
@@ -137,9 +144,9 @@ static void create_guest(void)
            " -usb -usbdevice tablet -device vfio-pci,sysfsdev="
            "/sys/bus/pci/devices/0000:00:02.0/%s &",
            qemu_path, hda_path, bios_path, mac_addr, uuid);
-    igt_assert_eq(system(create_qcow_cmd), 0);
-    igt_assert_eq(system(create_vgpu_cmd), 0);
-    igt_assert_eq(system(create_instance_cmd), 0);
+    igt_assert_eq(system(command), 0);
+
+    free(command);
 }
 
 static void destroy_all_guest(void)
-- 
2.17.0

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[igt-dev] [PATCH v2 i-g-t 2/2] Fix truncate string in the snprintf

[Rodrigo Siqueira]

This patch fix the following GCC warning:

../tools/intel_reg.c: In function ‘dump_decode’:
../tools/intel_reg.c:203:41: warning: ‘snprintf’ output may be truncated
before the last format character [-Wformat-truncation=]
   snprintf(decode, sizeof(decode), "\n%s", bin);
[..]
../tools/intel_reg.c:200:40: warning: ‘%s’ directive output may be
truncated writing up to 1023 bytes into a region of size 1022
[-Wformat-truncation=]
    snprintf(decode, sizeof(decode), " (%s)\n%s", tmp, bin);
[..]
../tools/intel_reg.c:200:4: note: ‘snprintf’ output between 5 and 2051
bytes into a destination of size 1024
    snprintf(decode, sizeof(decode), " (%s)\n%s", tmp, bin);
[..]

Notice that snprintf writes in the decode variable the values from tmp
and bin. These two variables together have 2048 bytes and some extra
characters added by snprintf, this commit changed the size of decode to
support the combination.

Changes since V1:
 - Improve commit message

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
---
 tools/intel_reg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/intel_reg.c b/tools/intel_reg.c
index ddff2794..15ebb86a 100644
--- a/tools/intel_reg.c
+++ b/tools/intel_reg.c
@@ -180,7 +180,7 @@ static void to_binary(char *buf, size_t buflen, uint32_t val)
 
 static void dump_decode(struct config *config, struct reg *reg, uint32_t val)
 {
-	char decode[1024];
+	char decode[2060];
 	char tmp[1024];
 	char bin[1024];
 
-- 
2.17.0

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[igt-dev] ✓ Fi.CI.BAT: success for Fix some GCC warnings (rev2)

[Patchwork]

== Series Details ==

Series: Fix some GCC warnings (rev2)
URL   : https://patchwork.freedesktop.org/series/43913/
State : success

== Summary ==

= CI Bug Log - changes from CI_DRM_4562 -> IGTPW_1670 =

== Summary - SUCCESS ==

  No regressions found.

  External URL: https://patchwork.freedesktop.org/api/1.0/series/43913/revisions/2/mbox/

== Known issues ==

  Here are the changes found in IGTPW_1670 that come from known issues:

  === IGT changes ===

    ==== Issues hit ====

    igt@kms_chamelium@dp-hpd-fast:
      fi-skl-6700k2:      SKIP -> FAIL (fdo#103841) +4

    igt@kms_chamelium@hdmi-crc-fast:
      fi-skl-6700k2:      PASS -> FAIL (fdo#103841) +3

    
    ==== Possible fixes ====

    igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
      fi-ivb-3520m:       FAIL (fdo#103375) -> PASS +2

    igt@kms_pipe_crc_basic@suspend-read-crc-pipe-b:
      {fi-cfl-8109u}:     DMESG-WARN (fdo#107345) -> PASS +1

    igt@kms_pipe_crc_basic@suspend-read-crc-pipe-c:
      {fi-cfl-8109u}:     INCOMPLETE (fdo#106070) -> PASS

    {igt@kms_psr@primary_mmap_gtt}:
      fi-cnl-psr:         DMESG-WARN (fdo#107372) -> PASS

    
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  fdo#103375 https://bugs.freedesktop.org/show_bug.cgi?id=103375
  fdo#103841 https://bugs.freedesktop.org/show_bug.cgi?id=103841
  fdo#106070 https://bugs.freedesktop.org/show_bug.cgi?id=106070
  fdo#107345 https://bugs.freedesktop.org/show_bug.cgi?id=107345
  fdo#107372 https://bugs.freedesktop.org/show_bug.cgi?id=107372


== Participating hosts (53 -> 43) ==

  Missing    (10): fi-ilk-m540 fi-hsw-4200u fi-byt-j1900 fi-byt-squawks fi-bsw-cyan fi-ctg-p8600 fi-kbl-8809g fi-icl-u fi-byt-clapper fi-bdw-samus 


== Build changes ==

    * IGT: IGT_4579 -> IGTPW_1670

  CI_DRM_4562: 99bbd80f75cdcf28699ffd3c93a714ca4a89b962 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGTPW_1670: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_1670/
  IGT_4579: a21999477545c2aed1e6a80dc93f87368614c7e5 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_1670/issues.html
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[igt-dev] ✓ Fi.CI.IGT: success for Fix some GCC warnings (rev2)

[Patchwork]

== Series Details ==

Series: Fix some GCC warnings (rev2)
URL   : https://patchwork.freedesktop.org/series/43913/
State : success

== Summary ==

= CI Bug Log - changes from IGT_4579_full -> IGTPW_1670_full =

== Summary - WARNING ==

  Minor unknown changes coming with IGTPW_1670_full need to be verified
  manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in IGTPW_1670_full, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://patchwork.freedesktop.org/api/1.0/series/43913/revisions/2/mbox/

== Possible new issues ==

  Here are the unknown changes that may have been introduced in IGTPW_1670_full:

  === IGT changes ===

    ==== Warnings ====

    igt@kms_vblank@pipe-b-query-forked-hang:
      shard-snb:          PASS -> SKIP +2

    
== Known issues ==

  Here are the changes found in IGTPW_1670_full that come from known issues:

  === IGT changes ===

    ==== Issues hit ====

    igt@gem_ppgtt@blt-vs-render-ctx0:
      shard-kbl:          PASS -> INCOMPLETE (fdo#106023, fdo#103665)

    igt@kms_cursor_crc@cursor-128x128-suspend:
      shard-kbl:          PASS -> INCOMPLETE (fdo#103665)

    igt@kms_cursor_legacy@2x-nonblocking-modeset-vs-cursor-atomic:
      shard-glk:          PASS -> FAIL (fdo#106509, fdo#105454)

    igt@kms_flip@flip-vs-expired-vblank-interruptible:
      shard-glk:          PASS -> FAIL (fdo#105363)

    igt@testdisplay:
      shard-glk:          PASS -> INCOMPLETE (fdo#107093, k.org#198133, fdo#103359)

    
    ==== Possible fixes ====

    igt@kms_flip@2x-flip-vs-expired-vblank-interruptible:
      shard-glk:          FAIL (fdo#105363) -> PASS

    igt@kms_frontbuffer_tracking@fbc-1p-primscrn-cur-indfb-draw-mmap-gtt:
      shard-snb:          DMESG-WARN -> PASS

    igt@kms_frontbuffer_tracking@psr-1p-primscrn-pri-indfb-draw-mmap-wc:
      shard-snb:          INCOMPLETE (fdo#105411) -> SKIP

    igt@kms_plane_multiple@atomic-pipe-a-tiling-x:
      shard-snb:          FAIL (fdo#103166) -> PASS

    igt@perf@blocking:
      shard-hsw:          FAIL (fdo#102252) -> PASS

    igt@pm_rpm@gem-execbuf:
      shard-glk:          FAIL (fdo#106539) -> PASS +4
      shard-apl:          FAIL (fdo#106539) -> PASS
      shard-kbl:          FAIL (fdo#106539) -> PASS
      shard-hsw:          FAIL (fdo#106539) -> PASS

    igt@pm_rpm@modeset-lpsp:
      shard-glk:          FAIL (fdo#106539) -> SKIP +1

    
  fdo#102252 https://bugs.freedesktop.org/show_bug.cgi?id=102252
  fdo#103166 https://bugs.freedesktop.org/show_bug.cgi?id=103166
  fdo#103359 https://bugs.freedesktop.org/show_bug.cgi?id=103359
  fdo#103665 https://bugs.freedesktop.org/show_bug.cgi?id=103665
  fdo#105363 https://bugs.freedesktop.org/show_bug.cgi?id=105363
  fdo#105411 https://bugs.freedesktop.org/show_bug.cgi?id=105411
  fdo#105454 https://bugs.freedesktop.org/show_bug.cgi?id=105454
  fdo#106023 https://bugs.freedesktop.org/show_bug.cgi?id=106023
  fdo#106509 https://bugs.freedesktop.org/show_bug.cgi?id=106509
  fdo#106539 https://bugs.freedesktop.org/show_bug.cgi?id=106539
  fdo#107093 https://bugs.freedesktop.org/show_bug.cgi?id=107093
  k.org#198133 https://bugzilla.kernel.org/show_bug.cgi?id=198133


== Participating hosts (5 -> 5) ==

  No changes in participating hosts


== Build changes ==

    * IGT: IGT_4579 -> IGTPW_1670
    * Linux: CI_DRM_4560 -> CI_DRM_4562

  CI_DRM_4560: b73c0ddef408783e556741ac9d3679b7d153e3e1 @ git://anongit.freedesktop.org/gfx-ci/linux
  CI_DRM_4562: 99bbd80f75cdcf28699ffd3c93a714ca4a89b962 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGTPW_1670: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_1670/
  IGT_4579: a21999477545c2aed1e6a80dc93f87368614c7e5 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_1670/shards.html
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Re: [igt-dev] [PATCH v2 i-g-t 0/2] Fix some GCC warnings

[Rodrigo Siqueira]

Hi,

I would like to know if there is any improvement that I can do for this
patchset.

Thanks

On 07/29, Rodrigo Siqueira wrote:
> During the compilation, some GCC (8.1) warnings are shown. This patchset
> address some of the warnings problems.
> 
> Changes since v2:
>  - Reduce the total amount of bytes allocated during command handling
>    operation
>  - Remove unnecessary memset operation
>  - Improved commit message
> 
> Rodrigo Siqueira (2):
>   Make string commands dynamic allocate
>   Fix truncate string in the snprintf
> 
>  tools/intel_gvtg_test.c | 25 ++++++++++++++++---------
>  tools/intel_reg.c       |  2 +-
>  2 files changed, 17 insertions(+), 10 deletions(-)
> 
> -- 
> 2.17.0
> 

-- 
Rodrigo Siqueira
http://siqueira.tech
Graduate Student
Department of Computer Science
University of São Paulo
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