[LTP] [PATCH] vma05.sh: Fix check for core file presence

[Xiao Yang]

Hi Yang

On 2023/11/10 11:56, Yang Xu wrote:
>   	rm -rf core*
>   	{ vma05_vdso; } > /dev/null 2>&1
> -	[ -f core ] || tst_brk TBROK "missing core file"
> +	[ -f core* ] || tst_brk TBROK "missing core file"

The root cause seems that the name of core file contains the pid number 
by default. I think the better solution is set 
/proc/sys/kernel/core_uses_pid to 0 before running vma05_vdso. Like this:

diff --git a/testcases/kernel/mem/vma/vma05.sh 
b/testcases/kernel/mem/vma/vma05.sh
index a09951462..e1ef1014e 100755
--- a/testcases/kernel/mem/vma/vma05.sh
+++ b/testcases/kernel/mem/vma/vma05.sh
@@ -25,11 +25,13 @@ TST_NEEDS_CMDS="gdb"

  CORE_LIMIT=$(ulimit -c)
  CORE_PATTERN=$(cat /proc/sys/kernel/core_pattern)
+CORE_USES_PID=$(cat /proc/sys/kernel/core_uses_pid)

  setup()
  {
         ulimit -c unlimited
         echo "core" > /proc/sys/kernel/core_pattern
+       echo 0 > /proc/sys/kernel/core_uses_pid
         unset DEBUGINFOD_URLS
  }

@@ -37,6 +39,7 @@ cleanup()
  {
         ulimit -c "$CORE_LIMIT"
         echo "$CORE_PATTERN" > /proc/sys/kernel/core_pattern
+       echo $CORE_USES_PID > /proc/sys/kernel/core_uses_pid
  }

Best Regards,
Xiao Yang