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//
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7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
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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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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,
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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
36TEST(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
56enum Turn {
57  FILL_CACHE,
58  CLEAN_CACHE,
59  SECOND_TIME_FILL_CACHE,
60  DONE
61};
62
63static Turn turn = FILL_CACHE;
64
65
66class 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
102class 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
126TEST(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
141class 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
172TEST(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
195class ThreadC : public v8::internal::Thread {
196 public:
197  ThreadC() : Thread("ThreadC") { }
198  void Run() {
199    Join();
200  }
201};
202
203
204TEST(ThreadJoinSelf) {
205  ThreadC thread;
206  thread.Start();
207  thread.Join();
208}
209