Add methods to enable configuration of ResourceConstraints based on limits derived at runtime.

src/defaults.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --track-fields --track-double-fields --allow-natives-syntax
-// Flags: --concurrent-recompilation --concurrent-recompilation-delay=100
+#include "../include/v8-defaults.h"
 
-if (!%IsConcurrentRecompilationSupported()) {
-  print("Concurrent recompilation is disabled. Skipping this test.");
-  quit();
+#include "platform.h"
+#include "globals.h"
+#include "v8.h"
+
+namespace v8 {
+
+bool ConfigureResourceConstraintsForCurrentPlatform(
+    ResourceConstraints* constraints) {
+  if (constraints == NULL) {
+    return false;
+  }
+
+  // young_space_size should be a power of 2 and old_generation_size should be
+  // a multiple of Page::kPageSize.
+  uintptr_t physical_memory = i::OS::TotalPhysicalMemory();
+  uintptr_t lump_of_memory = (i::kPointerSize / 4) * i::MB;
+  if (physical_memory > 2ul * i::GB) {
+    constraints->set_max_young_space_size(8 * lump_of_memory);
+    constraints->set_max_old_space_size(700 * lump_of_memory);
+    constraints->set_max_executable_size(256 * lump_of_memory);
+  } else if (physical_memory > 512ul * i::MB) {
+    constraints->set_max_young_space_size(4 * lump_of_memory);
+    constraints->set_max_old_space_size(192 * lump_of_memory);
+    constraints->set_max_executable_size(192 * lump_of_memory);
+  } else /* (physical_memory <= 512GB) */ {
+    constraints->set_max_young_space_size(1 * lump_of_memory);
+    constraints->set_max_old_space_size(96 * lump_of_memory);
+    constraints->set_max_executable_size(96 * lump_of_memory);
+  }
+  return true;
 }
 
-function new_object() {
-  var o = {};
-  o.a = 1;
-  o.b = 2;
-  return o;
+
+bool SetDefaultResourceConstraintsForCurrentPlatform() {
+  ResourceConstraints constraints;
+  if (!ConfigureResourceConstraintsForCurrentPlatform(&constraints))
+    return false;
+  return SetResourceConstraints(&constraints);
 }
 
-function add_field(obj) {
-  obj.c = 3;
-}
-
-add_field(new_object());
-add_field(new_object());
-%OptimizeFunctionOnNextCall(add_field, "concurrent");
-
-var o = new_object();
-// Trigger optimization in the background thread.
-add_field(o);
-// Invalidate transition map while optimization is underway.
-o.c = 2.2;
-// Sync with background thread to conclude optimization that bailed out.
-assertUnoptimized(add_field, "sync");
+}  // namespace v8::internal