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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.
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     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
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     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #include "src/v8.h"
     29 
     30 #include "src/platform.h"
     31 #include "src/isolate.h"
     32 
     33 #include "test/cctest/cctest.h"
     34 
     35 
     36 enum Turn {
     37   FILL_CACHE,
     38   CLEAN_CACHE,
     39   SECOND_TIME_FILL_CACHE,
     40   DONE
     41 };
     42 
     43 static Turn turn = FILL_CACHE;
     44 
     45 
     46 class ThreadA : public v8::internal::Thread {
     47  public:
     48   ThreadA() : Thread("ThreadA") { }
     49   void Run() {
     50     v8::Isolate* isolate = CcTest::isolate();
     51     v8::Locker locker(isolate);
     52     v8::Isolate::Scope isolate_scope(isolate);
     53     v8::HandleScope scope(isolate);
     54     v8::Handle<v8::Context> context = v8::Context::New(isolate);
     55     v8::Context::Scope context_scope(context);
     56 
     57     CHECK_EQ(FILL_CACHE, turn);
     58 
     59     // Fill String.search cache.
     60     v8::Handle<v8::Script> script = v8::Script::Compile(
     61         v8::String::NewFromUtf8(
     62           isolate,
     63           "for (var i = 0; i < 3; i++) {"
     64           "  var result = \"a\".search(\"a\");"
     65           "  if (result != 0) throw \"result: \" + result + \" @\" + i;"
     66           "};"
     67           "true"));
     68     CHECK(script->Run()->IsTrue());
     69 
     70     turn = CLEAN_CACHE;
     71     do {
     72       {
     73         v8::Unlocker unlocker(CcTest::isolate());
     74         Thread::YieldCPU();
     75       }
     76     } while (turn != SECOND_TIME_FILL_CACHE);
     77 
     78     // Rerun the script.
     79     CHECK(script->Run()->IsTrue());
     80 
     81     turn = DONE;
     82   }
     83 };
     84 
     85 
     86 class ThreadB : public v8::internal::Thread {
     87  public:
     88   ThreadB() : Thread("ThreadB") { }
     89   void Run() {
     90     do {
     91       {
     92         v8::Isolate* isolate = CcTest::isolate();
     93         v8::Locker locker(isolate);
     94         v8::Isolate::Scope isolate_scope(isolate);
     95         if (turn == CLEAN_CACHE) {
     96           v8::HandleScope scope(isolate);
     97           v8::Handle<v8::Context> context = v8::Context::New(isolate);
     98           v8::Context::Scope context_scope(context);
     99 
    100           // Clear the caches by forcing major GC.
    101           CcTest::heap()->CollectAllGarbage(v8::internal::Heap::kNoGCFlags);
    102           turn = SECOND_TIME_FILL_CACHE;
    103           break;
    104         }
    105       }
    106 
    107       Thread::YieldCPU();
    108     } while (true);
    109   }
    110 };
    111 
    112 
    113 TEST(JSFunctionResultCachesInTwoThreads) {
    114   ThreadA threadA;
    115   ThreadB threadB;
    116 
    117   threadA.Start();
    118   threadB.Start();
    119 
    120   threadA.Join();
    121   threadB.Join();
    122 
    123   CHECK_EQ(DONE, turn);
    124 }
    125 
    126 class ThreadIdValidationThread : public v8::internal::Thread {
    127  public:
    128   ThreadIdValidationThread(i::Thread* thread_to_start,
    129                            i::List<i::ThreadId>* refs,
    130                            unsigned int thread_no,
    131                            i::Semaphore* semaphore)
    132     : Thread("ThreadRefValidationThread"),
    133       refs_(refs), thread_no_(thread_no), thread_to_start_(thread_to_start),
    134       semaphore_(semaphore) {
    135   }
    136 
    137   void Run() {
    138     i::ThreadId thread_id = i::ThreadId::Current();
    139     for (int i = 0; i < thread_no_; i++) {
    140       CHECK(!(*refs_)[i].Equals(thread_id));
    141     }
    142     CHECK(thread_id.IsValid());
    143     (*refs_)[thread_no_] = thread_id;
    144     if (thread_to_start_ != NULL) {
    145       thread_to_start_->Start();
    146     }
    147     semaphore_->Signal();
    148   }
    149 
    150  private:
    151   i::List<i::ThreadId>* refs_;
    152   int thread_no_;
    153   i::Thread* thread_to_start_;
    154   i::Semaphore* semaphore_;
    155 };
    156 
    157 
    158 TEST(ThreadIdValidation) {
    159   const int kNThreads = 100;
    160   i::List<ThreadIdValidationThread*> threads(kNThreads);
    161   i::List<i::ThreadId> refs(kNThreads);
    162   i::Semaphore semaphore(0);
    163   ThreadIdValidationThread* prev = NULL;
    164   for (int i = kNThreads - 1; i >= 0; i--) {
    165     ThreadIdValidationThread* newThread =
    166         new ThreadIdValidationThread(prev, &refs, i, &semaphore);
    167     threads.Add(newThread);
    168     prev = newThread;
    169     refs.Add(i::ThreadId::Invalid());
    170   }
    171   prev->Start();
    172   for (int i = 0; i < kNThreads; i++) {
    173     semaphore.Wait();
    174   }
    175   for (int i = 0; i < kNThreads; i++) {
    176     delete threads[i];
    177   }
    178 }
    179 
    180 
    181 class ThreadC : public v8::internal::Thread {
    182  public:
    183   ThreadC() : Thread("ThreadC") { }
    184   void Run() {
    185     Join();
    186   }
    187 };
    188 
    189 
    190 TEST(ThreadJoinSelf) {
    191   ThreadC thread;
    192   thread.Start();
    193   thread.Join();
    194 }
    195