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      1 // Copyright 2008 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #include "v8.h"
     29 
     30 #include "platform.h"
     31 #include "isolate.h"
     32 
     33 #include "cctest.h"
     34 
     35 
     36 TEST(Preemption) {
     37   v8::Locker locker;
     38   v8::V8::Initialize();
     39   v8::HandleScope scope;
     40   v8::Context::Scope context_scope(v8::Context::New());
     41 
     42   v8::Locker::StartPreemption(100);
     43 
     44   v8::Handle<v8::Script> script = v8::Script::Compile(
     45       v8::String::New("var count = 0; var obj = new Object(); count++;\n"));
     46 
     47   script->Run();
     48 
     49   v8::Locker::StopPreemption();
     50   v8::internal::OS::Sleep(500);  // Make sure the timer fires.
     51 
     52   script->Run();
     53 }
     54 
     55 
     56 enum Turn {
     57   FILL_CACHE,
     58   CLEAN_CACHE,
     59   SECOND_TIME_FILL_CACHE,
     60   DONE
     61 };
     62 
     63 static Turn turn = FILL_CACHE;
     64 
     65 
     66 class ThreadA : public v8::internal::Thread {
     67  public:
     68   ThreadA() : Thread("ThreadA") { }
     69   void Run() {
     70     v8::Locker locker;
     71     v8::HandleScope scope;
     72     v8::Context::Scope context_scope(v8::Context::New());
     73 
     74     CHECK_EQ(FILL_CACHE, turn);
     75 
     76     // Fill String.search cache.
     77     v8::Handle<v8::Script> script = v8::Script::Compile(
     78         v8::String::New(
     79           "for (var i = 0; i < 3; i++) {"
     80           "  var result = \"a\".search(\"a\");"
     81           "  if (result != 0) throw \"result: \" + result + \" @\" + i;"
     82           "};"
     83           "true"));
     84     CHECK(script->Run()->IsTrue());
     85 
     86     turn = CLEAN_CACHE;
     87     do {
     88       {
     89         v8::Unlocker unlocker;
     90         Thread::YieldCPU();
     91       }
     92     } while (turn != SECOND_TIME_FILL_CACHE);
     93 
     94     // Rerun the script.
     95     CHECK(script->Run()->IsTrue());
     96 
     97     turn = DONE;
     98   }
     99 };
    100 
    101 
    102 class ThreadB : public v8::internal::Thread {
    103  public:
    104   ThreadB() : Thread("ThreadB") { }
    105   void Run() {
    106     do {
    107       {
    108         v8::Locker locker;
    109         if (turn == CLEAN_CACHE) {
    110           v8::HandleScope scope;
    111           v8::Context::Scope context_scope(v8::Context::New());
    112 
    113           // Clear the caches by forcing major GC.
    114           HEAP->CollectAllGarbage(v8::internal::Heap::kNoGCFlags);
    115           turn = SECOND_TIME_FILL_CACHE;
    116           break;
    117         }
    118       }
    119 
    120       Thread::YieldCPU();
    121     } while (true);
    122   }
    123 };
    124 
    125 
    126 TEST(JSFunctionResultCachesInTwoThreads) {
    127   v8::V8::Initialize();
    128 
    129   ThreadA threadA;
    130   ThreadB threadB;
    131 
    132   threadA.Start();
    133   threadB.Start();
    134 
    135   threadA.Join();
    136   threadB.Join();
    137 
    138   CHECK_EQ(DONE, turn);
    139 }
    140 
    141 class ThreadIdValidationThread : public v8::internal::Thread {
    142  public:
    143   ThreadIdValidationThread(i::Thread* thread_to_start,
    144                            i::List<i::ThreadId>* refs,
    145                            unsigned int thread_no,
    146                            i::Semaphore* semaphore)
    147     : Thread("ThreadRefValidationThread"),
    148       refs_(refs), thread_no_(thread_no), thread_to_start_(thread_to_start),
    149       semaphore_(semaphore) {
    150   }
    151 
    152   void Run() {
    153     i::ThreadId thread_id = i::ThreadId::Current();
    154     for (int i = 0; i < thread_no_; i++) {
    155       CHECK(!(*refs_)[i].Equals(thread_id));
    156     }
    157     CHECK(thread_id.IsValid());
    158     (*refs_)[thread_no_] = thread_id;
    159     if (thread_to_start_ != NULL) {
    160       thread_to_start_->Start();
    161     }
    162     semaphore_->Signal();
    163   }
    164 
    165  private:
    166   i::List<i::ThreadId>* refs_;
    167   int thread_no_;
    168   i::Thread* thread_to_start_;
    169   i::Semaphore* semaphore_;
    170 };
    171 
    172 TEST(ThreadIdValidation) {
    173   const int kNThreads = 100;
    174   i::List<ThreadIdValidationThread*> threads(kNThreads);
    175   i::List<i::ThreadId> refs(kNThreads);
    176   i::Semaphore* semaphore = i::OS::CreateSemaphore(0);
    177   ThreadIdValidationThread* prev = NULL;
    178   for (int i = kNThreads - 1; i >= 0; i--) {
    179     ThreadIdValidationThread* newThread =
    180         new ThreadIdValidationThread(prev, &refs, i, semaphore);
    181     threads.Add(newThread);
    182     prev = newThread;
    183     refs.Add(i::ThreadId::Invalid());
    184   }
    185   prev->Start();
    186   for (int i = 0; i < kNThreads; i++) {
    187     semaphore->Wait();
    188   }
    189   for (int i = 0; i < kNThreads; i++) {
    190     delete threads[i];
    191   }
    192 }
    193 
    194 
    195 class ThreadC : public v8::internal::Thread {
    196  public:
    197   ThreadC() : Thread("ThreadC") { }
    198   void Run() {
    199     Join();
    200   }
    201 };
    202 
    203 
    204 TEST(ThreadJoinSelf) {
    205   ThreadC thread;
    206   thread.Start();
    207   thread.Join();
    208 }
    209