Revert "run-tests: removed unused code"

This reverts commit 31edca1.

Author: staabm

run-tests.php

@@ -693,6 +693,7 @@ function main(): void
     if ($test_cnt) {
         putenv('NO_INTERACTION=1');
         usort($test_files, "test_sort");
+        $start_timestamp = time();
         $start_time = hrtime(true);
 
         echo "Running selected tests.\n";
@@ -3620,6 +3621,11 @@ class RuntestsValgrind
     protected bool $version_3_8_0;
     protected string $tool;
 
+    public function getHeader(): string
+    {
+        return $this->header;
+    }
+
     public function __construct(array $environment, string $tool = 'memcheck')
     {
         $this->tool = $tool;
@@ -3636,6 +3642,20 @@ public function __construct(array $environment, string $tool = 'memcheck')
         $this->header = sprintf("%s (%s)", trim($header), $this->tool);
         $this->version_3_8_0 = version_compare($version, '3.8.0', '>=');
     }
+
+    public function wrapCommand(string $cmd, string $memcheck_filename, bool $check_all): string
+    {
+        $vcmd = "valgrind -q --tool={$this->tool} --trace-children=yes";
+        if ($check_all) {
+            $vcmd .= ' --smc-check=all';
+        }
+
+        /* --vex-iropt-register-updates=allregs-at-mem-access is necessary for phpdbg watchpoint tests */
+        if ($this->version_3_8_0) {
+            return "$vcmd --vex-iropt-register-updates=allregs-at-mem-access --log-file=$memcheck_filename $cmd";
+        }
+        return "$vcmd --vex-iropt-precise-memory-exns=yes --log-file=$memcheck_filename $cmd";
+    }
 }
 
 class TestFile