[heap] Simplify and scale ResourceConstraints::ConfigureDefaults.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 856 matching lines @@
 
 ResourceConstraints::ResourceConstraints()
     : max_semi_space_size_(0),
       max_old_space_size_(0),
       stack_limit_(NULL),
       code_range_size_(0),
       max_zone_pool_size_(0) {}
 
 void ResourceConstraints::ConfigureDefaults(uint64_t physical_memory,
                                             uint64_t virtual_memory_limit) {
-#if V8_OS_ANDROID
-  // Android has higher physical memory requirements before raising the maximum
-  // heap size limits since it has no swap space.
-  const uint64_t low_limit = 512ul * i::MB;
-  const uint64_t medium_limit = 1ul * i::GB;
-  const uint64_t high_limit = 2ul * i::GB;
-#else
-  const uint64_t low_limit = 512ul * i::MB;
-  const uint64_t medium_limit = 768ul * i::MB;
-  const uint64_t high_limit = 1ul  * i::GB;
-#endif
-
-  if (physical_memory <= low_limit) {
-    set_max_semi_space_size(i::Heap::kMaxSemiSpaceSizeLowMemoryDevice);
-    set_max_old_space_size(i::Heap::kMaxOldSpaceSizeLowMemoryDevice);
-    set_max_zone_pool_size(i::AccountingAllocator::kMaxPoolSizeLowMemoryDevice);
-  } else if (physical_memory <= medium_limit) {
-    set_max_semi_space_size(i::Heap::kMaxSemiSpaceSizeMediumMemoryDevice);
-    set_max_old_space_size(i::Heap::kMaxOldSpaceSizeMediumMemoryDevice);
-    set_max_zone_pool_size(
-        i::AccountingAllocator::kMaxPoolSizeMediumMemoryDevice);
-  } else if (physical_memory <= high_limit) {
-    set_max_semi_space_size(i::Heap::kMaxSemiSpaceSizeHighMemoryDevice);
-    set_max_old_space_size(i::Heap::kMaxOldSpaceSizeHighMemoryDevice);
-    set_max_zone_pool_size(
-        i::AccountingAllocator::kMaxPoolSizeHighMemoryDevice);
-  } else {
-    set_max_semi_space_size(i::Heap::kMaxSemiSpaceSizeHugeMemoryDevice);
-    set_max_old_space_size(i::Heap::kMaxOldSpaceSizeHugeMemoryDevice);
-    set_max_zone_pool_size(
-        i::AccountingAllocator::kMaxPoolSizeHugeMemoryDevice);
-  }
+  set_max_semi_space_size(
+      static_cast<int>(i::Heap::ComputeMaxSemiSpaceSize(physical_memory)));
+  set_max_old_space_size(
+      static_cast<int>(i::Heap::ComputeMaxOldGenerationSize(physical_memory)));
+  set_max_zone_pool_size(i::AccountingAllocator::kMaxPoolSize);
 
   if (virtual_memory_limit > 0 && i::kRequiresCodeRange) {
     // Reserve no more than 1/8 of the memory for the code range, but at most
     // kMaximalCodeRangeSize.
     set_code_range_size(
         i::Min(i::kMaximalCodeRangeSize / i::MB,
                static_cast<size_t>((virtual_memory_limit >> 3) / i::MB)));
   }
 }
 
-
 void SetResourceConstraints(i::Isolate* isolate,
                             const ResourceConstraints& constraints) {
   int semi_space_size = constraints.max_semi_space_size();
   int old_space_size = constraints.max_old_space_size();
   size_t code_range_size = constraints.code_range_size();
   size_t max_pool_size = constraints.max_zone_pool_size();
   if (semi_space_size != 0 || old_space_size != 0 || code_range_size != 0) {
     isolate->heap()->ConfigureHeap(semi_space_size, old_space_size,
                                    code_range_size);
   }
@@ skipping 9582 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8