ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 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. |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 27 | // |
| 28 | // Tests of the TokenLock class from lock.h |
| 29 | |
| 30 | #include <pthread.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <unistd.h> // for usleep() |
| 33 | |
| 34 | #include "v8.h" |
| 35 | |
| 36 | #include "platform.h" |
| 37 | #include "cctest.h" |
| 38 | |
| 39 | using namespace ::v8::internal; |
| 40 | |
| 41 | |
| 42 | static void yield() { |
| 43 | UNIMPLEMENTED(); |
| 44 | } |
| 45 | |
| 46 | static const int kLockCounterLimit = 50; |
| 47 | static int busy_lock_counter = 0; |
| 48 | |
| 49 | |
| 50 | static void LoopIncrement(Mutex* mutex, int rem) { |
| 51 | while (true) { |
| 52 | int count = 0; |
| 53 | int last_count = -1; |
| 54 | do { |
| 55 | CHECK_EQ(0, mutex->Lock()); |
| 56 | count = busy_lock_counter; |
| 57 | CHECK_EQ(0, mutex->Unlock()); |
| 58 | yield(); |
| 59 | } while (count % 2 == rem && count < kLockCounterLimit); |
| 60 | if (count >= kLockCounterLimit) break; |
| 61 | CHECK_EQ(0, mutex->Lock()); |
| 62 | CHECK_EQ(count, busy_lock_counter); |
| 63 | CHECK(last_count == -1 || count == last_count + 1); |
| 64 | busy_lock_counter++; |
| 65 | last_count = count; |
| 66 | CHECK_EQ(0, mutex->Unlock()); |
| 67 | yield(); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | |
| 72 | static void* RunTestBusyLock(void* arg) { |
| 73 | LoopIncrement(static_cast<Mutex*>(arg), 0); |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | // Runs two threads that repeatedly acquire the lock and conditionally |
| 79 | // increment a variable. |
| 80 | TEST(BusyLock) { |
| 81 | pthread_t other; |
| 82 | Mutex* mutex = OS::CreateMutex(); |
| 83 | int thread_created = pthread_create(&other, |
| 84 | NULL, |
| 85 | &RunTestBusyLock, |
| 86 | mutex); |
| 87 | CHECK_EQ(0, thread_created); |
| 88 | LoopIncrement(mutex, 1); |
| 89 | pthread_join(other, NULL); |
| 90 | delete mutex; |
| 91 | } |
| 92 | |
| 93 | |
| 94 | TEST(VirtualMemory) { |
| 95 | VirtualMemory* vm = new VirtualMemory(1 * MB); |
| 96 | CHECK(vm->IsReserved()); |
| 97 | void* block_addr = vm->address(); |
| 98 | size_t block_size = 4 * KB; |
| 99 | CHECK(vm->Commit(block_addr, block_size, false)); |
| 100 | // Check whether we can write to memory. |
| 101 | int* addr = static_cast<int*>(block_addr); |
| 102 | addr[KB-1] = 2; |
| 103 | CHECK(vm->Uncommit(block_addr, block_size)); |
| 104 | delete vm; |
| 105 | } |