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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15//
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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
35enum Turn {
36  FILL_CACHE,
37  CLEAN_CACHE,
38  SECOND_TIME_FILL_CACHE,
39  DONE
40};
41
42static Turn turn = FILL_CACHE;
43
44
45class 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
85class 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
112TEST(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
125class 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
157TEST(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