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1 // Copyright 2012 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 "optimizing-compiler-thread.h" | |
29 | |
30 #include "v8.h" | |
31 | |
32 #include "hydrogen.h" | |
33 #include "isolate.h" | |
34 #include "v8threads.h" | |
35 | |
36 namespace v8 { | |
37 namespace internal { | |
38 | |
39 | |
40 void OptimizingCompilerThread::Run() { | |
41 #ifdef DEBUG | |
42 thread_id_ = ThreadId::Current().ToInteger(); | |
43 #endif | |
44 Isolate::SetIsolateThreadLocals(isolate_, NULL); | |
45 | |
46 while (true) { | |
47 input_queue_semaphore_->Wait(); | |
48 if (Acquire_Load(&stop_thread_)) { | |
49 stop_semaphore_->Signal(); | |
50 return; | |
51 } | |
52 | |
53 Heap::RelocationLock relocation_lock(isolate_->heap()); | |
54 OptimizingCompiler* optimizing_compiler = NULL; | |
55 input_queue_.Dequeue(&optimizing_compiler); | |
56 Barrier_AtomicIncrement(&queue_length_, static_cast<Atomic32>(-1)); | |
57 | |
58 ASSERT(!optimizing_compiler->info()->closure()->IsOptimized()); | |
59 | |
60 OptimizingCompiler::Status status = optimizing_compiler->OptimizeGraph(); | |
61 ASSERT(status != OptimizingCompiler::FAILED); | |
62 (void) status; | |
Yang
2012/07/19 16:37:17
What does this line do?
| |
63 | |
64 output_queue_.Enqueue(optimizing_compiler); | |
65 isolate_->stack_guard()->RequestCodeReadyEvent(); | |
66 } | |
67 } | |
68 | |
69 | |
70 void OptimizingCompilerThread::Stop() { | |
71 Release_Store(&stop_thread_, static_cast<AtomicWord>(true)); | |
72 input_queue_semaphore_->Signal(); | |
73 stop_semaphore_->Wait(); | |
74 } | |
75 | |
76 | |
77 void OptimizingCompilerThread::InstallOptimizedFunctions() { | |
78 HandleScope handle_scope(isolate_); | |
79 int functions_installed = 0; | |
80 while (!output_queue_.IsEmpty()) { | |
81 OptimizingCompiler* compiler = NULL; | |
82 output_queue_.Dequeue(&compiler); | |
83 Compiler::InstallOptimizedCode(compiler); | |
84 functions_installed++; | |
85 } | |
86 if (FLAG_trace_parallel_recompilation && functions_installed != 0) { | |
87 PrintF(" ** Installed %d function(s).\n", functions_installed); | |
88 } | |
89 } | |
90 | |
91 | |
92 void OptimizingCompilerThread::QueueForOptimization( | |
93 OptimizingCompiler* optimizing_compiler) { | |
94 input_queue_.Enqueue(optimizing_compiler); | |
95 input_queue_semaphore_->Signal(); | |
96 } | |
97 | |
98 #ifdef DEBUG | |
99 bool OptimizingCompilerThread::IsOptimizerThread() { | |
100 if (!FLAG_parallel_recompilation) | |
101 return false; | |
Yang
2012/07/19 16:37:17
Put this on the previous line or in {}.
| |
102 return ThreadId::Current().ToInteger() == thread_id_; | |
103 } | |
104 #endif | |
105 | |
106 | |
107 } } // namespace v8::internal | |
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