[heap] Lock Mutex in ForceEvacuationCandidate

Lock the mutex of PagedSpace before invoking FreeLinearAllocationArea().

Bug: v8:10315
Change-Id: If96b9b8b72932590daf3d548be41c20796ed524f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2367857Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69515}

test/cctest/heap/heap-utils.cc

@@ -4,6 +4,7 @@
 
 #include "test/cctest/heap/heap-utils.h"
 
+#include "src/base/platform/mutex.h"
 #include "src/execution/isolate.h"
 #include "src/heap/factory.h"
 #include "src/heap/heap-inl.h"
@@ -224,6 +225,7 @@ void ForceEvacuationCandidate(Page* page) {
     int remaining = static_cast<int>(limit - top);
     space->heap()->CreateFillerObjectAt(top, remaining,
                                         ClearRecordedSlots::kNo);
+    base::MutexGuard guard(space->mutex());
     space->FreeLinearAllocationArea();
   }
 }