[tools] Fully implement linux-perf tools --timeout

Change-Id: I462af434a695a09c9b65b11759e01aace463b414
No-Try: True
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3755147
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81641}

tools/profiling/linux-perf-chrome.py

@@ -5,6 +5,7 @@
 
 import optparse
 from pathlib import Path
+from datetime import datetime, timedelta
 import os
 import shlex
 import subprocess
@@ -114,8 +115,11 @@ JS_FLAGS_PERF = ("--perf-prof", "--no-write-protect-code-memory",
 
 
 def wait_for_process_timeout(process):
-  sleeping_time = 0
-  while (sleeping_time < options.timeout):
+  delta = timedelta(seconds=options.timeout)
+  start_time = datetime.now()
+  while True:
+    if (datetime.now() - start_time) >= delta:
+      return False
     processHasStopped = process.poll() is not None
     if processHasStopped:
       return True

tools/profiling/linux-perf-d8.py

@@ -3,7 +3,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-from datetime import datetime
+from datetime import datetime, timedelta
 from pathlib import Path
 import optparse
 import os
@@ -166,8 +166,11 @@ log("LINUX PERF CMD: ", shlex.join(cmd))
 
 
 def wait_for_process_timeout(process):
-  sleeping_time = 0
-  while (sleeping_time < options.timeout):
+  delta = timedelta(seconds=options.timeout)
+  start_time = datetime.now()
+  while True:
+    if (datetime.now() - start_time) >= delta:
+      return False
     processHasStopped = process.poll() is not None
     if processHasStopped:
       return True