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      1 // Copyright 2008 the V8 project authors. All rights reserved.
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      3 // modification, are permitted provided that the following conditions are
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      8 //     * Redistributions in binary form must reproduce the above
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     14 //       from this software without specific prior written permission.
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     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #include "src/v8.h"
     29 #include "test/cctest/cctest.h"
     30 
     31 #include "src/base/platform/platform.h"
     32 #include "src/isolate.h"
     33 
     34 
     35 enum Turn {
     36   FILL_CACHE,
     37   CLEAN_CACHE,
     38   SECOND_TIME_FILL_CACHE,
     39   DONE
     40 };
     41 
     42 static Turn turn = FILL_CACHE;
     43 
     44 
     45 class ThreadA : public v8::base::Thread {
     46  public:
     47   ThreadA() : Thread(Options("ThreadA")) {}
     48   void Run() {
     49     v8::Isolate* isolate = CcTest::isolate();
     50     v8::Locker locker(isolate);
     51     v8::Isolate::Scope isolate_scope(isolate);
     52     v8::HandleScope scope(isolate);
     53     v8::Handle<v8::Context> context = v8::Context::New(isolate);
     54     v8::Context::Scope context_scope(context);
     55 
     56     CHECK_EQ(FILL_CACHE, turn);
     57 
     58     // Fill String.search cache.
     59     v8::Handle<v8::Script> script = v8::Script::Compile(
     60         v8::String::NewFromUtf8(
     61           isolate,
     62           "for (var i = 0; i < 3; i++) {"
     63           "  var result = \"a\".search(\"a\");"
     64           "  if (result != 0) throw \"result: \" + result + \" @\" + i;"
     65           "};"
     66           "true"));
     67     CHECK(script->Run()->IsTrue());
     68 
     69     turn = CLEAN_CACHE;
     70     do {
     71       {
     72         v8::Unlocker unlocker(CcTest::isolate());
     73         Thread::YieldCPU();
     74       }
     75     } while (turn != SECOND_TIME_FILL_CACHE);
     76 
     77     // Rerun the script.
     78     CHECK(script->Run()->IsTrue());
     79 
     80     turn = DONE;
     81   }
     82 };
     83 
     84 
     85 class ThreadB : public v8::base::Thread {
     86  public:
     87   ThreadB() : Thread(Options("ThreadB")) {}
     88   void Run() {
     89     do {
     90       {
     91         v8::Isolate* isolate = CcTest::isolate();
     92         v8::Locker locker(isolate);
     93         v8::Isolate::Scope isolate_scope(isolate);
     94         if (turn == CLEAN_CACHE) {
     95           v8::HandleScope scope(isolate);
     96           v8::Handle<v8::Context> context = v8::Context::New(isolate);
     97           v8::Context::Scope context_scope(context);
     98 
     99           // Clear the caches by forcing major GC.
    100           CcTest::heap()->CollectAllGarbage(v8::internal::Heap::kNoGCFlags);
    101           turn = SECOND_TIME_FILL_CACHE;
    102           break;
    103         }
    104       }
    105 
    106       Thread::YieldCPU();
    107     } while (true);
    108   }
    109 };
    110 
    111 
    112 TEST(JSFunctionResultCachesInTwoThreads) {
    113   ThreadA threadA;
    114   ThreadB threadB;
    115 
    116   threadA.Start();
    117   threadB.Start();
    118 
    119   threadA.Join();
    120   threadB.Join();
    121 
    122   CHECK_EQ(DONE, turn);
    123 }
    124 
    125 class ThreadIdValidationThread : public v8::base::Thread {
    126  public:
    127   ThreadIdValidationThread(v8::base::Thread* thread_to_start,
    128                            i::List<i::ThreadId>* refs, unsigned int thread_no,
    129                            v8::base::Semaphore* semaphore)
    130       : Thread(Options("ThreadRefValidationThread")),
    131         refs_(refs),
    132         thread_no_(thread_no),
    133         thread_to_start_(thread_to_start),
    134         semaphore_(semaphore) {}
    135 
    136   void Run() {
    137     i::ThreadId thread_id = i::ThreadId::Current();
    138     for (int i = 0; i < thread_no_; i++) {
    139       CHECK(!(*refs_)[i].Equals(thread_id));
    140     }
    141     CHECK(thread_id.IsValid());
    142     (*refs_)[thread_no_] = thread_id;
    143     if (thread_to_start_ != NULL) {
    144       thread_to_start_->Start();
    145     }
    146     semaphore_->Signal();
    147   }
    148 
    149  private:
    150   i::List<i::ThreadId>* refs_;
    151   int thread_no_;
    152   v8::base::Thread* thread_to_start_;
    153   v8::base::Semaphore* semaphore_;
    154 };
    155 
    156 
    157 TEST(ThreadIdValidation) {
    158   const int kNThreads = 100;
    159   i::List<ThreadIdValidationThread*> threads(kNThreads);
    160   i::List<i::ThreadId> refs(kNThreads);
    161   v8::base::Semaphore semaphore(0);
    162   ThreadIdValidationThread* prev = NULL;
    163   for (int i = kNThreads - 1; i >= 0; i--) {
    164     ThreadIdValidationThread* newThread =
    165         new ThreadIdValidationThread(prev, &refs, i, &semaphore);
    166     threads.Add(newThread);
    167     prev = newThread;
    168     refs.Add(i::ThreadId::Invalid());
    169   }
    170   prev->Start();
    171   for (int i = 0; i < kNThreads; i++) {
    172     semaphore.Wait();
    173   }
    174   for (int i = 0; i < kNThreads; i++) {
    175     delete threads[i];
    176   }
    177 }
    178