Expose a lower bound of malloc'd memory via heap statistics

test/cctest/compiler/function-tester.h

 // Copyright 2014 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.
 
 #ifndef V8_CCTEST_COMPILER_FUNCTION_TESTER_H_
 #define V8_CCTEST_COMPILER_FUNCTION_TESTER_H_
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/scopes.h"
 #include "src/compiler.h"
@@ skipping 157 matching lines @@
       FunctionTester f(graph, param_count);
       p = *f.function;
     }
     return Handle<JSFunction>(p);  // allocated in outer handle scope.
   }
 
  private:
   uint32_t flags_;
 
   Handle<JSFunction> Compile(Handle<JSFunction> function) {
-    Zone zone;
+    Zone zone(function->GetIsolate()->allocator());
     ParseInfo parse_info(&zone, function);
     CompilationInfo info(&parse_info);
     info.MarkAsDeoptimizationEnabled();
 
     CHECK(Parser::ParseStatic(info.parse_info()));
     info.SetOptimizing();
     if (flags_ & CompilationInfo::kFunctionContextSpecializing) {
       info.MarkAsFunctionContextSpecializing();
     }
     if (flags_ & CompilationInfo::kInliningEnabled) {
@@ skipping 28 matching lines @@
   }
 
   std::string BuildFunctionFromDescriptor(
       const CallInterfaceDescriptor& descriptor) {
     return BuildFunction(descriptor.GetParameterCount());
   }
 
   // Compile the given machine graph instead of the source of the function
   // and replace the JSFunction's code with the result.
   Handle<JSFunction> CompileGraph(Graph* graph) {
-    Zone zone;
+    Zone zone(function->GetIsolate()->allocator());
     ParseInfo parse_info(&zone, function);
     CompilationInfo info(&parse_info);
 
     CHECK(Parser::ParseStatic(info.parse_info()));
     info.SetOptimizing();
     CHECK(Compiler::Analyze(info.parse_info()));
     CHECK(Compiler::EnsureDeoptimizationSupport(&info));
 
     Handle<Code> code = Pipeline::GenerateCodeForTesting(&info, graph);
     CHECK(!code.is_null());
     function->ReplaceCode(*code);
     return function;
   }
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_FUNCTION_TESTER_H_