2011-03-18 20:35:07 +00:00
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// Copyright 2006-2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <stdlib.h>
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#include "v8.h"
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#include "ast.h"
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#include "bootstrapper.h"
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#include "codegen.h"
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#include "compilation-cache.h"
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#include "debug.h"
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#include "deoptimizer.h"
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#include "heap-profiler.h"
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#include "hydrogen.h"
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#include "isolate.h"
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#include "lithium-allocator.h"
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#include "log.h"
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#include "regexp-stack.h"
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#include "runtime-profiler.h"
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#include "scanner.h"
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#include "scopeinfo.h"
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#include "serialize.h"
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#include "simulator.h"
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#include "spaces.h"
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#include "stub-cache.h"
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#include "version.h"
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namespace v8 {
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namespace internal {
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// Create a dummy thread that will wait forever on a semaphore. The only
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// purpose for this thread is to have some stack area to save essential data
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// into for use by a stacks only core dump (aka minidump).
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class PreallocatedMemoryThread: public Thread {
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public:
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char* data() {
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if (data_ready_semaphore_ != NULL) {
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// Initial access is guarded until the data has been published.
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data_ready_semaphore_->Wait();
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delete data_ready_semaphore_;
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data_ready_semaphore_ = NULL;
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}
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return data_;
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}
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unsigned length() {
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if (data_ready_semaphore_ != NULL) {
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// Initial access is guarded until the data has been published.
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data_ready_semaphore_->Wait();
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delete data_ready_semaphore_;
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data_ready_semaphore_ = NULL;
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}
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return length_;
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}
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// Stop the PreallocatedMemoryThread and release its resources.
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void StopThread() {
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keep_running_ = false;
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wait_for_ever_semaphore_->Signal();
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// Wait for the thread to terminate.
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Join();
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if (data_ready_semaphore_ != NULL) {
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delete data_ready_semaphore_;
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data_ready_semaphore_ = NULL;
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}
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delete wait_for_ever_semaphore_;
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wait_for_ever_semaphore_ = NULL;
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}
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protected:
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// When the thread starts running it will allocate a fixed number of bytes
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// on the stack and publish the location of this memory for others to use.
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void Run() {
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EmbeddedVector<char, 15 * 1024> local_buffer;
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// Initialize the buffer with a known good value.
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OS::StrNCpy(local_buffer, "Trace data was not generated.\n",
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local_buffer.length());
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// Publish the local buffer and signal its availability.
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data_ = local_buffer.start();
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length_ = local_buffer.length();
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data_ready_semaphore_->Signal();
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while (keep_running_) {
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// This thread will wait here until the end of time.
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wait_for_ever_semaphore_->Wait();
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}
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// Make sure we access the buffer after the wait to remove all possibility
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// of it being optimized away.
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OS::StrNCpy(local_buffer, "PreallocatedMemoryThread shutting down.\n",
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local_buffer.length());
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}
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private:
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explicit PreallocatedMemoryThread(Isolate* isolate)
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: Thread(isolate, "v8:PreallocMem"),
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keep_running_(true),
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wait_for_ever_semaphore_(OS::CreateSemaphore(0)),
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data_ready_semaphore_(OS::CreateSemaphore(0)),
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data_(NULL),
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length_(0) {
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}
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// Used to make sure that the thread keeps looping even for spurious wakeups.
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bool keep_running_;
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// This semaphore is used by the PreallocatedMemoryThread to wait for ever.
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Semaphore* wait_for_ever_semaphore_;
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// Semaphore to signal that the data has been initialized.
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Semaphore* data_ready_semaphore_;
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// Location and size of the preallocated memory block.
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char* data_;
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unsigned length_;
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friend class Isolate;
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DISALLOW_COPY_AND_ASSIGN(PreallocatedMemoryThread);
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};
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void Isolate::PreallocatedMemoryThreadStart() {
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if (preallocated_memory_thread_ != NULL) return;
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preallocated_memory_thread_ = new PreallocatedMemoryThread(this);
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preallocated_memory_thread_->Start();
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}
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void Isolate::PreallocatedMemoryThreadStop() {
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if (preallocated_memory_thread_ == NULL) return;
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preallocated_memory_thread_->StopThread();
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// Done with the thread entirely.
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delete preallocated_memory_thread_;
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preallocated_memory_thread_ = NULL;
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}
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2011-03-29 13:06:48 +00:00
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void Isolate::PreallocatedStorageInit(size_t size) {
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ASSERT(free_list_.next_ == &free_list_);
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ASSERT(free_list_.previous_ == &free_list_);
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PreallocatedStorage* free_chunk =
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reinterpret_cast<PreallocatedStorage*>(new char[size]);
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free_list_.next_ = free_list_.previous_ = free_chunk;
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free_chunk->next_ = free_chunk->previous_ = &free_list_;
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free_chunk->size_ = size - sizeof(PreallocatedStorage);
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preallocated_storage_preallocated_ = true;
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}
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void* Isolate::PreallocatedStorageNew(size_t size) {
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if (!preallocated_storage_preallocated_) {
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return FreeStoreAllocationPolicy::New(size);
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}
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ASSERT(free_list_.next_ != &free_list_);
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ASSERT(free_list_.previous_ != &free_list_);
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size = (size + kPointerSize - 1) & ~(kPointerSize - 1);
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// Search for exact fit.
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for (PreallocatedStorage* storage = free_list_.next_;
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storage != &free_list_;
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storage = storage->next_) {
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if (storage->size_ == size) {
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storage->Unlink();
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storage->LinkTo(&in_use_list_);
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return reinterpret_cast<void*>(storage + 1);
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}
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}
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// Search for first fit.
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for (PreallocatedStorage* storage = free_list_.next_;
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storage != &free_list_;
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storage = storage->next_) {
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if (storage->size_ >= size + sizeof(PreallocatedStorage)) {
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storage->Unlink();
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storage->LinkTo(&in_use_list_);
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PreallocatedStorage* left_over =
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reinterpret_cast<PreallocatedStorage*>(
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reinterpret_cast<char*>(storage + 1) + size);
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left_over->size_ = storage->size_ - size - sizeof(PreallocatedStorage);
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ASSERT(size + left_over->size_ + sizeof(PreallocatedStorage) ==
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storage->size_);
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storage->size_ = size;
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left_over->LinkTo(&free_list_);
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return reinterpret_cast<void*>(storage + 1);
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}
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}
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// Allocation failure.
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ASSERT(false);
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return NULL;
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}
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// We don't attempt to coalesce.
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void Isolate::PreallocatedStorageDelete(void* p) {
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if (p == NULL) {
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return;
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}
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if (!preallocated_storage_preallocated_) {
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FreeStoreAllocationPolicy::Delete(p);
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return;
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}
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PreallocatedStorage* storage = reinterpret_cast<PreallocatedStorage*>(p) - 1;
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ASSERT(storage->next_->previous_ == storage);
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ASSERT(storage->previous_->next_ == storage);
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storage->Unlink();
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storage->LinkTo(&free_list_);
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}
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2011-03-18 20:35:07 +00:00
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Isolate* Isolate::default_isolate_ = NULL;
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Thread::LocalStorageKey Isolate::isolate_key_;
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Thread::LocalStorageKey Isolate::thread_id_key_;
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Thread::LocalStorageKey Isolate::per_isolate_thread_data_key_;
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Mutex* Isolate::process_wide_mutex_ = OS::CreateMutex();
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Isolate::ThreadDataTable* Isolate::thread_data_table_ = NULL;
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Isolate::ThreadId Isolate::highest_thread_id_ = 0;
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class IsolateInitializer {
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public:
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IsolateInitializer() {
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Isolate::EnsureDefaultIsolate();
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}
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};
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static IsolateInitializer* EnsureDefaultIsolateAllocated() {
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// TODO(isolates): Use the system threading API to do this once?
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static IsolateInitializer static_initializer;
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return &static_initializer;
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}
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// This variable only needed to trigger static intialization.
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static IsolateInitializer* static_initializer = EnsureDefaultIsolateAllocated();
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Isolate::ThreadId Isolate::AllocateThreadId() {
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ThreadId new_id;
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{
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ScopedLock lock(process_wide_mutex_);
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new_id = ++highest_thread_id_;
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}
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return new_id;
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}
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Isolate::PerIsolateThreadData* Isolate::AllocatePerIsolateThreadData(
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ThreadId thread_id) {
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ASSERT(thread_id != 0);
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ASSERT(Thread::GetThreadLocalInt(thread_id_key_) == thread_id);
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PerIsolateThreadData* per_thread = new PerIsolateThreadData(this, thread_id);
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{
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ScopedLock lock(process_wide_mutex_);
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ASSERT(thread_data_table_->Lookup(this, thread_id) == NULL);
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thread_data_table_->Insert(per_thread);
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ASSERT(thread_data_table_->Lookup(this, thread_id) == per_thread);
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}
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return per_thread;
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}
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Isolate::PerIsolateThreadData*
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Isolate::FindOrAllocatePerThreadDataForThisThread() {
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ThreadId thread_id = Thread::GetThreadLocalInt(thread_id_key_);
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if (thread_id == 0) {
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thread_id = AllocateThreadId();
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Thread::SetThreadLocalInt(thread_id_key_, thread_id);
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}
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PerIsolateThreadData* per_thread = NULL;
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{
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ScopedLock lock(process_wide_mutex_);
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per_thread = thread_data_table_->Lookup(this, thread_id);
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if (per_thread == NULL) {
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per_thread = AllocatePerIsolateThreadData(thread_id);
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}
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}
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return per_thread;
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}
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void Isolate::EnsureDefaultIsolate() {
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ScopedLock lock(process_wide_mutex_);
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if (default_isolate_ == NULL) {
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isolate_key_ = Thread::CreateThreadLocalKey();
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thread_id_key_ = Thread::CreateThreadLocalKey();
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per_isolate_thread_data_key_ = Thread::CreateThreadLocalKey();
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thread_data_table_ = new Isolate::ThreadDataTable();
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default_isolate_ = new Isolate();
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}
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// Can't use SetIsolateThreadLocals(default_isolate_, NULL) here
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// becase a non-null thread data may be already set.
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Thread::SetThreadLocal(isolate_key_, default_isolate_);
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CHECK(default_isolate_->PreInit());
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}
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Debugger* Isolate::GetDefaultIsolateDebugger() {
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EnsureDefaultIsolate();
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return default_isolate_->debugger();
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}
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StackGuard* Isolate::GetDefaultIsolateStackGuard() {
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EnsureDefaultIsolate();
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return default_isolate_->stack_guard();
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}
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void Isolate::EnterDefaultIsolate() {
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EnsureDefaultIsolate();
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ASSERT(default_isolate_ != NULL);
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PerIsolateThreadData* data = CurrentPerIsolateThreadData();
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// If not yet in default isolate - enter it.
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if (data == NULL || data->isolate() != default_isolate_) {
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default_isolate_->Enter();
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}
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}
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Isolate* Isolate::GetDefaultIsolateForLocking() {
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EnsureDefaultIsolate();
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return default_isolate_;
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}
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Isolate::ThreadDataTable::ThreadDataTable()
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: list_(NULL) {
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}
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Isolate::PerIsolateThreadData*
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Isolate::ThreadDataTable::Lookup(Isolate* isolate, ThreadId thread_id) {
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for (PerIsolateThreadData* data = list_; data != NULL; data = data->next_) {
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if (data->Matches(isolate, thread_id)) return data;
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}
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return NULL;
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}
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void Isolate::ThreadDataTable::Insert(Isolate::PerIsolateThreadData* data) {
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if (list_ != NULL) list_->prev_ = data;
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data->next_ = list_;
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list_ = data;
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}
|
|
|
|
|
|
|
|
|
|
|
|
void Isolate::ThreadDataTable::Remove(PerIsolateThreadData* data) {
|
|
|
|
if (list_ == data) list_ = data->next_;
|
|
|
|
if (data->next_ != NULL) data->next_->prev_ = data->prev_;
|
|
|
|
if (data->prev_ != NULL) data->prev_->next_ = data->next_;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Isolate::ThreadDataTable::Remove(Isolate* isolate, ThreadId thread_id) {
|
|
|
|
PerIsolateThreadData* data = Lookup(isolate, thread_id);
|
|
|
|
if (data != NULL) {
|
|
|
|
Remove(data);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
#define TRACE_ISOLATE(tag) \
|
|
|
|
do { \
|
|
|
|
if (FLAG_trace_isolates) { \
|
|
|
|
PrintF("Isolate %p " #tag "\n", reinterpret_cast<void*>(this)); \
|
|
|
|
} \
|
|
|
|
} while (false)
|
|
|
|
#else
|
|
|
|
#define TRACE_ISOLATE(tag)
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
Isolate::Isolate()
|
|
|
|
: state_(UNINITIALIZED),
|
|
|
|
entry_stack_(NULL),
|
|
|
|
stack_trace_nesting_level_(0),
|
|
|
|
incomplete_message_(NULL),
|
|
|
|
preallocated_memory_thread_(NULL),
|
|
|
|
preallocated_message_space_(NULL),
|
|
|
|
bootstrapper_(NULL),
|
|
|
|
runtime_profiler_(NULL),
|
|
|
|
compilation_cache_(NULL),
|
|
|
|
counters_(new Counters()),
|
|
|
|
code_range_(NULL),
|
|
|
|
break_access_(OS::CreateMutex()),
|
|
|
|
logger_(new Logger()),
|
|
|
|
stats_table_(new StatsTable()),
|
|
|
|
stub_cache_(NULL),
|
|
|
|
deoptimizer_data_(NULL),
|
|
|
|
capture_stack_trace_for_uncaught_exceptions_(false),
|
|
|
|
stack_trace_for_uncaught_exceptions_frame_limit_(0),
|
|
|
|
stack_trace_for_uncaught_exceptions_options_(StackTrace::kOverview),
|
|
|
|
transcendental_cache_(NULL),
|
|
|
|
memory_allocator_(NULL),
|
|
|
|
keyed_lookup_cache_(NULL),
|
|
|
|
context_slot_cache_(NULL),
|
|
|
|
descriptor_lookup_cache_(NULL),
|
|
|
|
handle_scope_implementer_(NULL),
|
|
|
|
scanner_constants_(NULL),
|
|
|
|
in_use_list_(0),
|
|
|
|
free_list_(0),
|
|
|
|
preallocated_storage_preallocated_(false),
|
|
|
|
pc_to_code_cache_(NULL),
|
|
|
|
write_input_buffer_(NULL),
|
|
|
|
global_handles_(NULL),
|
|
|
|
context_switcher_(NULL),
|
|
|
|
thread_manager_(NULL),
|
|
|
|
ast_sentinels_(NULL),
|
|
|
|
string_tracker_(NULL),
|
|
|
|
regexp_stack_(NULL),
|
|
|
|
frame_element_constant_list_(0),
|
|
|
|
result_constant_list_(0) {
|
|
|
|
TRACE_ISOLATE(constructor);
|
|
|
|
|
|
|
|
memset(isolate_addresses_, 0,
|
|
|
|
sizeof(isolate_addresses_[0]) * (k_isolate_address_count + 1));
|
|
|
|
|
|
|
|
heap_.isolate_ = this;
|
|
|
|
zone_.isolate_ = this;
|
|
|
|
stack_guard_.isolate_ = this;
|
|
|
|
|
2011-03-28 13:05:36 +00:00
|
|
|
#if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \
|
|
|
|
defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__)
|
2011-03-18 20:35:07 +00:00
|
|
|
simulator_initialized_ = false;
|
|
|
|
simulator_i_cache_ = NULL;
|
|
|
|
simulator_redirection_ = NULL;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
// heap_histograms_ initializes itself.
|
|
|
|
memset(&js_spill_information_, 0, sizeof(js_spill_information_));
|
|
|
|
memset(code_kind_statistics_, 0,
|
|
|
|
sizeof(code_kind_statistics_[0]) * Code::NUMBER_OF_KINDS);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
|
|
debug_ = NULL;
|
|
|
|
debugger_ = NULL;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef ENABLE_LOGGING_AND_PROFILING
|
|
|
|
producer_heap_profile_ = NULL;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
handle_scope_data_.Initialize();
|
|
|
|
|
|
|
|
#define ISOLATE_INIT_EXECUTE(type, name, initial_value) \
|
|
|
|
name##_ = (initial_value);
|
|
|
|
ISOLATE_INIT_LIST(ISOLATE_INIT_EXECUTE)
|
|
|
|
#undef ISOLATE_INIT_EXECUTE
|
|
|
|
|
|
|
|
#define ISOLATE_INIT_ARRAY_EXECUTE(type, name, length) \
|
|
|
|
memset(name##_, 0, sizeof(type) * length);
|
|
|
|
ISOLATE_INIT_ARRAY_LIST(ISOLATE_INIT_ARRAY_EXECUTE)
|
|
|
|
#undef ISOLATE_INIT_ARRAY_EXECUTE
|
|
|
|
}
|
|
|
|
|
|
|
|
void Isolate::TearDown() {
|
|
|
|
TRACE_ISOLATE(tear_down);
|
|
|
|
|
|
|
|
// Temporarily set this isolate as current so that various parts of
|
|
|
|
// the isolate can access it in their destructors without having a
|
|
|
|
// direct pointer. We don't use Enter/Exit here to avoid
|
|
|
|
// initializing the thread data.
|
|
|
|
PerIsolateThreadData* saved_data = CurrentPerIsolateThreadData();
|
|
|
|
Isolate* saved_isolate = UncheckedCurrent();
|
|
|
|
SetIsolateThreadLocals(this, NULL);
|
|
|
|
|
|
|
|
Deinit();
|
|
|
|
|
|
|
|
if (!IsDefaultIsolate()) {
|
|
|
|
delete this;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Restore the previous current isolate.
|
|
|
|
SetIsolateThreadLocals(saved_isolate, saved_data);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Isolate::Deinit() {
|
|
|
|
if (state_ == INITIALIZED) {
|
|
|
|
TRACE_ISOLATE(deinit);
|
|
|
|
|
|
|
|
if (FLAG_hydrogen_stats) HStatistics::Instance()->Print();
|
|
|
|
|
|
|
|
// We must stop the logger before we tear down other components.
|
|
|
|
logger_->EnsureTickerStopped();
|
|
|
|
|
|
|
|
delete deoptimizer_data_;
|
|
|
|
deoptimizer_data_ = NULL;
|
|
|
|
if (FLAG_preemption) {
|
|
|
|
v8::Locker locker;
|
|
|
|
v8::Locker::StopPreemption();
|
|
|
|
}
|
|
|
|
builtins_.TearDown();
|
|
|
|
bootstrapper_->TearDown();
|
|
|
|
|
|
|
|
// Remove the external reference to the preallocated stack memory.
|
|
|
|
delete preallocated_message_space_;
|
|
|
|
preallocated_message_space_ = NULL;
|
|
|
|
PreallocatedMemoryThreadStop();
|
|
|
|
|
|
|
|
HeapProfiler::TearDown();
|
|
|
|
CpuProfiler::TearDown();
|
|
|
|
if (runtime_profiler_ != NULL) {
|
|
|
|
runtime_profiler_->TearDown();
|
|
|
|
delete runtime_profiler_;
|
|
|
|
runtime_profiler_ = NULL;
|
|
|
|
}
|
|
|
|
heap_.TearDown();
|
|
|
|
logger_->TearDown();
|
|
|
|
|
|
|
|
// The default isolate is re-initializable due to legacy API.
|
|
|
|
state_ = PREINITIALIZED;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Isolate::SetIsolateThreadLocals(Isolate* isolate,
|
|
|
|
PerIsolateThreadData* data) {
|
|
|
|
Thread::SetThreadLocal(isolate_key_, isolate);
|
|
|
|
Thread::SetThreadLocal(per_isolate_thread_data_key_, data);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
Isolate::~Isolate() {
|
|
|
|
TRACE_ISOLATE(destructor);
|
|
|
|
|
|
|
|
#ifdef ENABLE_LOGGING_AND_PROFILING
|
|
|
|
delete producer_heap_profile_;
|
|
|
|
producer_heap_profile_ = NULL;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
delete scanner_constants_;
|
|
|
|
scanner_constants_ = NULL;
|
|
|
|
|
|
|
|
delete regexp_stack_;
|
|
|
|
regexp_stack_ = NULL;
|
|
|
|
|
|
|
|
delete ast_sentinels_;
|
|
|
|
ast_sentinels_ = NULL;
|
|
|
|
|
|
|
|
delete descriptor_lookup_cache_;
|
|
|
|
descriptor_lookup_cache_ = NULL;
|
|
|
|
delete context_slot_cache_;
|
|
|
|
context_slot_cache_ = NULL;
|
|
|
|
delete keyed_lookup_cache_;
|
|
|
|
keyed_lookup_cache_ = NULL;
|
|
|
|
|
|
|
|
delete transcendental_cache_;
|
|
|
|
transcendental_cache_ = NULL;
|
|
|
|
delete stub_cache_;
|
|
|
|
stub_cache_ = NULL;
|
|
|
|
delete stats_table_;
|
|
|
|
stats_table_ = NULL;
|
|
|
|
|
|
|
|
delete logger_;
|
|
|
|
logger_ = NULL;
|
|
|
|
|
|
|
|
delete counters_;
|
|
|
|
counters_ = NULL;
|
|
|
|
|
|
|
|
delete handle_scope_implementer_;
|
|
|
|
handle_scope_implementer_ = NULL;
|
|
|
|
delete break_access_;
|
|
|
|
break_access_ = NULL;
|
|
|
|
|
|
|
|
delete compilation_cache_;
|
|
|
|
compilation_cache_ = NULL;
|
|
|
|
delete bootstrapper_;
|
|
|
|
bootstrapper_ = NULL;
|
|
|
|
delete pc_to_code_cache_;
|
|
|
|
pc_to_code_cache_ = NULL;
|
|
|
|
delete write_input_buffer_;
|
|
|
|
write_input_buffer_ = NULL;
|
|
|
|
|
|
|
|
delete context_switcher_;
|
|
|
|
context_switcher_ = NULL;
|
|
|
|
delete thread_manager_;
|
|
|
|
thread_manager_ = NULL;
|
|
|
|
|
|
|
|
delete string_tracker_;
|
|
|
|
string_tracker_ = NULL;
|
|
|
|
|
|
|
|
delete memory_allocator_;
|
|
|
|
memory_allocator_ = NULL;
|
|
|
|
delete code_range_;
|
|
|
|
code_range_ = NULL;
|
|
|
|
delete global_handles_;
|
|
|
|
global_handles_ = NULL;
|
|
|
|
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
|
|
delete debugger_;
|
|
|
|
debugger_ = NULL;
|
|
|
|
delete debug_;
|
|
|
|
debug_ = NULL;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
bool Isolate::PreInit() {
|
|
|
|
if (state_ != UNINITIALIZED) return true;
|
|
|
|
|
|
|
|
TRACE_ISOLATE(preinit);
|
|
|
|
|
|
|
|
ASSERT(Isolate::Current() == this);
|
|
|
|
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
|
|
debug_ = new Debug(this);
|
|
|
|
debugger_ = new Debugger();
|
|
|
|
debugger_->isolate_ = this;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
memory_allocator_ = new MemoryAllocator();
|
|
|
|
memory_allocator_->isolate_ = this;
|
|
|
|
code_range_ = new CodeRange();
|
|
|
|
code_range_->isolate_ = this;
|
|
|
|
|
|
|
|
// Safe after setting Heap::isolate_, initializing StackGuard and
|
|
|
|
// ensuring that Isolate::Current() == this.
|
|
|
|
heap_.SetStackLimits();
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
DisallowAllocationFailure disallow_allocation_failure;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#define C(name) isolate_addresses_[Isolate::k_##name] = \
|
|
|
|
reinterpret_cast<Address>(name());
|
|
|
|
ISOLATE_ADDRESS_LIST(C)
|
|
|
|
ISOLATE_ADDRESS_LIST_PROF(C)
|
|
|
|
#undef C
|
|
|
|
|
|
|
|
string_tracker_ = new StringTracker();
|
|
|
|
string_tracker_->isolate_ = this;
|
|
|
|
thread_manager_ = new ThreadManager();
|
|
|
|
thread_manager_->isolate_ = this;
|
2011-03-21 10:22:57 +00:00
|
|
|
compilation_cache_ = new CompilationCache(this);
|
2011-03-18 20:35:07 +00:00
|
|
|
transcendental_cache_ = new TranscendentalCache();
|
|
|
|
keyed_lookup_cache_ = new KeyedLookupCache();
|
|
|
|
context_slot_cache_ = new ContextSlotCache();
|
|
|
|
descriptor_lookup_cache_ = new DescriptorLookupCache();
|
|
|
|
scanner_constants_ = new ScannerConstants();
|
|
|
|
pc_to_code_cache_ = new PcToCodeCache(this);
|
|
|
|
write_input_buffer_ = new StringInputBuffer();
|
|
|
|
global_handles_ = new GlobalHandles(this);
|
|
|
|
bootstrapper_ = new Bootstrapper();
|
|
|
|
handle_scope_implementer_ = new HandleScopeImplementer();
|
|
|
|
stub_cache_ = new StubCache(this);
|
|
|
|
ast_sentinels_ = new AstSentinels();
|
|
|
|
regexp_stack_ = new RegExpStack();
|
|
|
|
regexp_stack_->isolate_ = this;
|
|
|
|
|
|
|
|
#ifdef ENABLE_LOGGING_AND_PROFILING
|
|
|
|
producer_heap_profile_ = new ProducerHeapProfile();
|
|
|
|
producer_heap_profile_->isolate_ = this;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
state_ = PREINITIALIZED;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Isolate::InitializeThreadLocal() {
|
|
|
|
thread_local_top_.Initialize();
|
|
|
|
clear_pending_exception();
|
|
|
|
clear_pending_message();
|
|
|
|
clear_scheduled_exception();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-04-07 19:52:24 +00:00
|
|
|
void Isolate::PropagatePendingExceptionToExternalTryCatch() {
|
|
|
|
ASSERT(has_pending_exception());
|
|
|
|
|
|
|
|
bool external_caught = IsExternallyCaught();
|
|
|
|
thread_local_top_.external_caught_exception_ = external_caught;
|
|
|
|
|
|
|
|
if (!external_caught) return;
|
|
|
|
|
|
|
|
if (thread_local_top_.pending_exception_ == Failure::OutOfMemoryException()) {
|
|
|
|
// Do not propagate OOM exception: we should kill VM asap.
|
|
|
|
} else if (thread_local_top_.pending_exception_ ==
|
|
|
|
heap()->termination_exception()) {
|
|
|
|
try_catch_handler()->can_continue_ = false;
|
|
|
|
try_catch_handler()->exception_ = heap()->null_value();
|
|
|
|
} else {
|
|
|
|
// At this point all non-object (failure) exceptions have
|
|
|
|
// been dealt with so this shouldn't fail.
|
|
|
|
ASSERT(!pending_exception()->IsFailure());
|
|
|
|
try_catch_handler()->can_continue_ = true;
|
|
|
|
try_catch_handler()->exception_ = pending_exception();
|
|
|
|
if (!thread_local_top_.pending_message_obj_->IsTheHole()) {
|
|
|
|
try_catch_handler()->message_ = thread_local_top_.pending_message_obj_;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-03-18 20:35:07 +00:00
|
|
|
bool Isolate::Init(Deserializer* des) {
|
|
|
|
ASSERT(state_ != INITIALIZED);
|
|
|
|
|
|
|
|
TRACE_ISOLATE(init);
|
|
|
|
|
|
|
|
bool create_heap_objects = des == NULL;
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
// The initialization process does not handle memory exhaustion.
|
|
|
|
DisallowAllocationFailure disallow_allocation_failure;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if (state_ == UNINITIALIZED && !PreInit()) return false;
|
|
|
|
|
|
|
|
// Enable logging before setting up the heap
|
|
|
|
logger_->Setup();
|
|
|
|
|
|
|
|
CpuProfiler::Setup();
|
|
|
|
HeapProfiler::Setup();
|
|
|
|
|
|
|
|
// Initialize other runtime facilities
|
|
|
|
#if defined(USE_SIMULATOR)
|
2011-03-28 13:05:36 +00:00
|
|
|
#if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS)
|
2011-03-18 20:35:07 +00:00
|
|
|
Simulator::Initialize();
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
|
|
|
|
{ // NOLINT
|
|
|
|
// Ensure that the thread has a valid stack guard. The v8::Locker object
|
|
|
|
// will ensure this too, but we don't have to use lockers if we are only
|
|
|
|
// using one thread.
|
|
|
|
ExecutionAccess lock(this);
|
|
|
|
stack_guard_.InitThread(lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Setup the object heap
|
|
|
|
ASSERT(!heap_.HasBeenSetup());
|
|
|
|
if (!heap_.Setup(create_heap_objects)) {
|
|
|
|
V8::SetFatalError();
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
bootstrapper_->Initialize(create_heap_objects);
|
|
|
|
builtins_.Setup(create_heap_objects);
|
|
|
|
|
|
|
|
InitializeThreadLocal();
|
|
|
|
|
|
|
|
// Only preallocate on the first initialization.
|
|
|
|
if (FLAG_preallocate_message_memory && preallocated_message_space_ == NULL) {
|
|
|
|
// Start the thread which will set aside some memory.
|
|
|
|
PreallocatedMemoryThreadStart();
|
|
|
|
preallocated_message_space_ =
|
|
|
|
new NoAllocationStringAllocator(
|
|
|
|
preallocated_memory_thread_->data(),
|
|
|
|
preallocated_memory_thread_->length());
|
|
|
|
PreallocatedStorageInit(preallocated_memory_thread_->length() / 4);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (FLAG_preemption) {
|
|
|
|
v8::Locker locker;
|
|
|
|
v8::Locker::StartPreemption(100);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
|
|
debug_->Setup(create_heap_objects);
|
|
|
|
#endif
|
|
|
|
stub_cache_->Initialize(create_heap_objects);
|
|
|
|
|
|
|
|
// If we are deserializing, read the state into the now-empty heap.
|
|
|
|
if (des != NULL) {
|
|
|
|
des->Deserialize();
|
|
|
|
stub_cache_->Clear();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Deserializing may put strange things in the root array's copy of the
|
|
|
|
// stack guard.
|
|
|
|
heap_.SetStackLimits();
|
|
|
|
|
|
|
|
deoptimizer_data_ = new DeoptimizerData;
|
|
|
|
runtime_profiler_ = new RuntimeProfiler(this);
|
|
|
|
runtime_profiler_->Setup();
|
|
|
|
|
|
|
|
// If we are deserializing, log non-function code objects and compiled
|
|
|
|
// functions found in the snapshot.
|
|
|
|
if (des != NULL && FLAG_log_code) {
|
|
|
|
HandleScope scope;
|
|
|
|
LOG(this, LogCodeObjects());
|
|
|
|
LOG(this, LogCompiledFunctions());
|
|
|
|
}
|
|
|
|
|
|
|
|
state_ = INITIALIZED;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Isolate::Enter() {
|
|
|
|
Isolate* current_isolate = NULL;
|
|
|
|
PerIsolateThreadData* current_data = CurrentPerIsolateThreadData();
|
|
|
|
if (current_data != NULL) {
|
|
|
|
current_isolate = current_data->isolate_;
|
|
|
|
ASSERT(current_isolate != NULL);
|
|
|
|
if (current_isolate == this) {
|
|
|
|
ASSERT(Current() == this);
|
|
|
|
ASSERT(entry_stack_ != NULL);
|
|
|
|
ASSERT(entry_stack_->previous_thread_data == NULL ||
|
|
|
|
entry_stack_->previous_thread_data->thread_id() ==
|
|
|
|
Thread::GetThreadLocalInt(thread_id_key_));
|
|
|
|
// Same thread re-enters the isolate, no need to re-init anything.
|
|
|
|
entry_stack_->entry_count++;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Threads can have default isolate set into TLS as Current but not yet have
|
|
|
|
// PerIsolateThreadData for it, as it requires more advanced phase of the
|
|
|
|
// initialization. For example, a thread might be the one that system used for
|
|
|
|
// static initializers - in this case the default isolate is set in TLS but
|
|
|
|
// the thread did not yet Enter the isolate. If PerisolateThreadData is not
|
|
|
|
// there, use the isolate set in TLS.
|
|
|
|
if (current_isolate == NULL) {
|
|
|
|
current_isolate = Isolate::UncheckedCurrent();
|
|
|
|
}
|
|
|
|
|
|
|
|
PerIsolateThreadData* data = FindOrAllocatePerThreadDataForThisThread();
|
|
|
|
ASSERT(data != NULL);
|
|
|
|
ASSERT(data->isolate_ == this);
|
|
|
|
|
|
|
|
EntryStackItem* item = new EntryStackItem(current_data,
|
|
|
|
current_isolate,
|
|
|
|
entry_stack_);
|
|
|
|
entry_stack_ = item;
|
|
|
|
|
|
|
|
SetIsolateThreadLocals(this, data);
|
|
|
|
|
|
|
|
CHECK(PreInit());
|
|
|
|
|
|
|
|
// In case it's the first time some thread enters the isolate.
|
|
|
|
set_thread_id(data->thread_id());
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Isolate::Exit() {
|
|
|
|
ASSERT(entry_stack_ != NULL);
|
|
|
|
ASSERT(entry_stack_->previous_thread_data == NULL ||
|
|
|
|
entry_stack_->previous_thread_data->thread_id() ==
|
|
|
|
Thread::GetThreadLocalInt(thread_id_key_));
|
|
|
|
|
|
|
|
if (--entry_stack_->entry_count > 0) return;
|
|
|
|
|
|
|
|
ASSERT(CurrentPerIsolateThreadData() != NULL);
|
|
|
|
ASSERT(CurrentPerIsolateThreadData()->isolate_ == this);
|
|
|
|
|
|
|
|
// Pop the stack.
|
|
|
|
EntryStackItem* item = entry_stack_;
|
|
|
|
entry_stack_ = item->previous_item;
|
|
|
|
|
|
|
|
PerIsolateThreadData* previous_thread_data = item->previous_thread_data;
|
|
|
|
Isolate* previous_isolate = item->previous_isolate;
|
|
|
|
|
|
|
|
delete item;
|
|
|
|
|
|
|
|
// Reinit the current thread for the isolate it was running before this one.
|
|
|
|
SetIsolateThreadLocals(previous_isolate, previous_thread_data);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Isolate::ResetEagerOptimizingData() {
|
|
|
|
compilation_cache_->ResetEagerOptimizingData();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
#define ISOLATE_FIELD_OFFSET(type, name, ignored) \
|
|
|
|
const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
|
|
|
|
ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
|
|
|
|
ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
|
|
|
|
#undef ISOLATE_FIELD_OFFSET
|
|
|
|
#endif
|
|
|
|
|
|
|
|
} } // namespace v8::internal
|