Revert r13494: "Use MemoryChunk-based allocation for deoptimization entry code"

This patch seems to cause crashes on Windows.

TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/12049069

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13495 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/deoptimizer.cc

@@ -44,18 +44,8 @@ DeoptimizerData::DeoptimizerData() {
   eager_deoptimization_entry_code_entries_ = -1;
   lazy_deoptimization_entry_code_entries_ = -1;
   size_t deopt_table_size = Deoptimizer::GetMaxDeoptTableSize();
-  MemoryAllocator* allocator = Isolate::Current()->memory_allocator();
-  size_t initial_commit_size = OS::CommitPageSize();
-  eager_deoptimization_entry_code_ =
-      allocator->AllocateChunk(deopt_table_size,
-                               initial_commit_size,
-                               EXECUTABLE,
-                               NULL);
-  lazy_deoptimization_entry_code_ =
-       allocator->AllocateChunk(deopt_table_size,
-                               initial_commit_size,
-                               EXECUTABLE,
-                               NULL);
+  eager_deoptimization_entry_code_ = new VirtualMemory(deopt_table_size);
+  lazy_deoptimization_entry_code_ = new VirtualMemory(deopt_table_size);
   current_ = NULL;
   deoptimizing_code_list_ = NULL;
 #ifdef ENABLE_DEBUGGER_SUPPORT
@@ -65,11 +55,9 @@ DeoptimizerData::DeoptimizerData() {
 
 
 DeoptimizerData::~DeoptimizerData() {
-  Isolate::Current()->memory_allocator()->Free(
-      eager_deoptimization_entry_code_);
+  delete eager_deoptimization_entry_code_;
   eager_deoptimization_entry_code_ = NULL;
-  Isolate::Current()->memory_allocator()->Free(
-      lazy_deoptimization_entry_code_);
+  delete lazy_deoptimization_entry_code_;
   lazy_deoptimization_entry_code_ = NULL;
 
   DeoptimizingCodeListNode* current = deoptimizing_code_list_;
@@ -629,7 +617,7 @@ Address Deoptimizer::GetDeoptimizationEntry(int id,
                                             GetEntryMode mode) {
   ASSERT(id >= 0);
   if (id >= kMaxNumberOfEntries) return NULL;
-  MemoryChunk* base = NULL;
+  VirtualMemory* base = NULL;
   if (mode == ENSURE_ENTRY_CODE) {
     EnsureCodeForDeoptimizationEntry(type, id);
   } else {
@@ -641,27 +629,28 @@ Address Deoptimizer::GetDeoptimizationEntry(int id,
   } else {
     base = data->lazy_deoptimization_entry_code_;
   }
-  return base->area_start() + (id * table_entry_size_);
+  return
+      static_cast<Address>(base->address()) + (id * table_entry_size_);
 }
 
 
 int Deoptimizer::GetDeoptimizationId(Address addr, BailoutType type) {
-  MemoryChunk* base = NULL;
+  VirtualMemory* base = NULL;
   DeoptimizerData* data = Isolate::Current()->deoptimizer_data();
   if (type == EAGER) {
     base = data->eager_deoptimization_entry_code_;
   } else {
     base = data->lazy_deoptimization_entry_code_;
   }
-  Address start = base->area_start();
+  Address base_casted = reinterpret_cast<Address>(base->address());
   if (base == NULL ||
-      addr < start ||
-      addr >= start + (kMaxNumberOfEntries * table_entry_size_)) {
+      addr < base->address() ||
+      addr >= base_casted + (kMaxNumberOfEntries * table_entry_size_)) {
     return kNotDeoptimizationEntry;
   }
   ASSERT_EQ(0,
-            static_cast<int>(addr - start) % table_entry_size_);
-  return static_cast<int>(addr - start) / table_entry_size_;
+            static_cast<int>(addr - base_casted) % table_entry_size_);
+  return static_cast<int>(addr - base_casted) / table_entry_size_;
 }
 
 
@@ -1580,14 +1569,14 @@ void Deoptimizer::EnsureCodeForDeoptimizationEntry(BailoutType type,
   CodeDesc desc;
   masm.GetCode(&desc);
 
-  MemoryChunk* chunk = type == EAGER
+  VirtualMemory* memory = type == EAGER
       ? data->eager_deoptimization_entry_code_
       : data->lazy_deoptimization_entry_code_;
-  ASSERT(static_cast<int>(Deoptimizer::GetMaxDeoptTableSize()) >=
-         desc.instr_size);
-  chunk->CommitArea(desc.instr_size);
-  memcpy(chunk->area_start(), desc.buffer, desc.instr_size);
-  CPU::FlushICache(chunk->area_start(), desc.instr_size);
+  size_t table_size = Deoptimizer::GetMaxDeoptTableSize();
+  ASSERT(static_cast<int>(table_size) >= desc.instr_size);
+  memory->Commit(memory->address(), table_size, true);
+  memcpy(memory->address(), desc.buffer, desc.instr_size);
+  CPU::FlushICache(memory->address(), desc.instr_size);
 
   if (type == EAGER) {
     data->eager_deoptimization_entry_code_entries_ = entry_count;

src/deoptimizer.h

@@ -113,8 +113,8 @@ class DeoptimizerData {
  private:
   int eager_deoptimization_entry_code_entries_;
   int lazy_deoptimization_entry_code_entries_;
-  MemoryChunk* eager_deoptimization_entry_code_;
-  MemoryChunk* lazy_deoptimization_entry_code_;
+  VirtualMemory* eager_deoptimization_entry_code_;
+  VirtualMemory* lazy_deoptimization_entry_code_;
   Deoptimizer* current_;
 
 #ifdef ENABLE_DEBUGGER_SUPPORT

src/isolate.h

@@ -1311,7 +1311,6 @@ class Isolate {
   friend class StackGuard;
   friend class ThreadId;
   friend class TestMemoryAllocatorScope;
-  friend class TestCodeRangeScope;
   friend class v8::Isolate;
   friend class v8::Locker;
   friend class v8::Unlocker;

src/spaces.h

@@ -645,7 +645,6 @@ class MemoryChunk {
   int area_size() {
     return static_cast<int>(area_end() - area_start());
   }
-  bool CommitArea(size_t requested);
 
   // Approximate amount of physical memory committed for this chunk.
   size_t CommittedPhysicalMemory() {
@@ -888,11 +887,8 @@ class CodeRange {
   // Allocates a chunk of memory from the large-object portion of
   // the code range.  On platforms with no separate code range, should
   // not be called.
-  MUST_USE_RESULT Address AllocateRawMemory(const size_t requested_size,
-                                            const size_t commit_size,
+  MUST_USE_RESULT Address AllocateRawMemory(const size_t requested,
                                             size_t* allocated);
-  bool CommitRawMemory(Address start, size_t length);
-  bool UncommitRawMemory(Address start, size_t length);
   void FreeRawMemory(Address buf, size_t length);
 
  private:
@@ -1040,19 +1036,14 @@ class MemoryAllocator {
   void ReportStatistics();
 #endif
 
-  // Returns a MemoryChunk in which the memory region from commit_area_size to
-  // reserve_area_size of the chunk area is reserved but not committed, it
-  // could be committed later by calling MemoryChunk::CommitArea.
-  MemoryChunk* AllocateChunk(intptr_t reserve_area_size,
-                             intptr_t commit_area_size,
+  MemoryChunk* AllocateChunk(intptr_t body_size,
                              Executability executable,
                              Space* space);
 
   Address ReserveAlignedMemory(size_t requested,
                                size_t alignment,
                                VirtualMemory* controller);
-  Address AllocateAlignedMemory(size_t reserve_size,
-                                size_t commit_size,
+  Address AllocateAlignedMemory(size_t requested,
                                 size_t alignment,
                                 Executability executable,
                                 VirtualMemory* controller);
@@ -1102,10 +1093,9 @@ class MemoryAllocator {
     return CodePageAreaEndOffset() - CodePageAreaStartOffset();
   }
 
-  MUST_USE_RESULT static bool CommitExecutableMemory(VirtualMemory* vm,
-                                                     Address start,
-                                                     size_t commit_size,
-                                                     size_t reserved_size);
+  MUST_USE_RESULT static bool CommitCodePage(VirtualMemory* vm,
+                                             Address start,
+                                             size_t size);
 
  private:
   Isolate* isolate_;

test/cctest/test-alloc.cc

@@ -204,9 +204,7 @@ TEST(CodeRange) {
           (Page::kMaxNonCodeHeapObjectSize << (Pseudorandom() % 3)) +
           Pseudorandom() % 5000 + 1;
       size_t allocated = 0;
-      Address base = code_range->AllocateRawMemory(requested,
-                                                   requested,
-                                                   &allocated);
+      Address base = code_range->AllocateRawMemory(requested, &allocated);
       CHECK(base != NULL);
       blocks.Add(Block(base, static_cast<int>(allocated)));
       current_allocated += static_cast<int>(allocated);

test/cctest/test-spaces.cc

@@ -121,148 +121,9 @@ class TestMemoryAllocatorScope {
   DISALLOW_COPY_AND_ASSIGN(TestMemoryAllocatorScope);
 };
 
-
-// Temporarily sets a given code range in an isolate.
-class TestCodeRangeScope {
- public:
-  TestCodeRangeScope(Isolate* isolate, CodeRange* code_range)
-      : isolate_(isolate),
-        old_code_range_(isolate->code_range_) {
-    isolate->code_range_ = code_range;
-  }
-
-  ~TestCodeRangeScope() {
-    isolate_->code_range_ = old_code_range_;
-  }
-
- private:
-  Isolate* isolate_;
-  CodeRange* old_code_range_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestCodeRangeScope);
-};
-
 } }  // namespace v8::internal
 
 
-static void VerifyMemoryChunk(Isolate* isolate,
-                              Heap* heap,
-                              CodeRange* code_range,
-                              size_t reserve_area_size,
-                              size_t commit_area_size,
-                              size_t second_commit_area_size,
-                              Executability executable) {
-  MemoryAllocator* memory_allocator = new MemoryAllocator(isolate);
-  CHECK(memory_allocator->SetUp(heap->MaxReserved(),
-                                heap->MaxExecutableSize()));
-  TestMemoryAllocatorScope test_allocator_scope(isolate, memory_allocator);
-  TestCodeRangeScope test_code_range_scope(isolate, code_range);
-
-  size_t header_size = (executable == EXECUTABLE)
-                       ? MemoryAllocator::CodePageGuardStartOffset()
-                       : MemoryChunk::kObjectStartOffset;
-  size_t guard_size = (executable == EXECUTABLE)
-                       ? MemoryAllocator::CodePageGuardSize()
-                       : 0;
-
-  MemoryChunk* memory_chunk = memory_allocator->AllocateChunk(reserve_area_size,
-                                                              commit_area_size,
-                                                              executable,
-                                                              NULL);
-  size_t alignment = code_range->exists() ?
-                     MemoryChunk::kAlignment : OS::CommitPageSize();
-  size_t reserved_size = ((executable == EXECUTABLE))
-      ? RoundUp(header_size + guard_size + reserve_area_size + guard_size,
-                alignment)
-      : RoundUp(header_size + reserve_area_size, OS::CommitPageSize());
-  CHECK(memory_chunk->size() == reserved_size);
-  CHECK(memory_chunk->area_start() < memory_chunk->address() +
-                                     memory_chunk->size());
-  CHECK(memory_chunk->area_end() <= memory_chunk->address() +
-                                    memory_chunk->size());
-  CHECK(static_cast<size_t>(memory_chunk->area_size()) == commit_area_size);
-
-  Address area_start = memory_chunk->area_start();
-
-  memory_chunk->CommitArea(second_commit_area_size);
-  CHECK(area_start == memory_chunk->area_start());
-  CHECK(memory_chunk->area_start() < memory_chunk->address() +
-                                     memory_chunk->size());
-  CHECK(memory_chunk->area_end() <= memory_chunk->address() +
-                                    memory_chunk->size());
-  CHECK(static_cast<size_t>(memory_chunk->area_size()) ==
-      second_commit_area_size);
-
-  memory_allocator->Free(memory_chunk);
-  memory_allocator->TearDown();
-  delete memory_allocator;
-}
-
-
-static unsigned int Pseudorandom() {
-  static uint32_t lo = 2345;
-  lo = 18273 * (lo & 0xFFFFF) + (lo >> 16);
-  return lo & 0xFFFFF;
-}
-
-
-TEST(MemoryChunk) {
-  OS::SetUp();
-  Isolate* isolate = Isolate::Current();
-  isolate->InitializeLoggingAndCounters();
-  Heap* heap = isolate->heap();
-  CHECK(heap->ConfigureHeapDefault());
-
-  size_t reserve_area_size = 1 * MB;
-  size_t initial_commit_area_size, second_commit_area_size;
-
-  for (int i = 0; i < 100; i++) {
-    initial_commit_area_size = Pseudorandom();
-    second_commit_area_size = Pseudorandom();
-
-    // With CodeRange.
-    CodeRange* code_range = new CodeRange(isolate);
-    const int code_range_size = 32 * MB;
-    if (!code_range->SetUp(code_range_size)) return;
-
-    VerifyMemoryChunk(isolate,
-                      heap,
-                      code_range,
-                      reserve_area_size,
-                      initial_commit_area_size,
-                      second_commit_area_size,
-                      EXECUTABLE);
-
-    VerifyMemoryChunk(isolate,
-                      heap,
-                      code_range,
-                      reserve_area_size,
-                      initial_commit_area_size,
-                      second_commit_area_size,
-                      NOT_EXECUTABLE);
-    delete code_range;
-
-    // Without CodeRange.
-    code_range = NULL;
-    VerifyMemoryChunk(isolate,
-                      heap,
-                      code_range,
-                      reserve_area_size,
-                      initial_commit_area_size,
-                      second_commit_area_size,
-                      EXECUTABLE);
-
-    VerifyMemoryChunk(isolate,
-                      heap,
-                      code_range,
-                      reserve_area_size,
-                      initial_commit_area_size,
-                      second_commit_area_size,
-                      NOT_EXECUTABLE);
-  }
-}
-
-
 TEST(MemoryAllocator) {
   OS::SetUp();
   Isolate* isolate = Isolate::Current();