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

src/wasm/wasm-js.cc

 // Copyright 2015 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 "src/api-natives.h"
 #include "src/assert-scope.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/factory.h"
@@ skipping 68 matching lines @@
 
 
 void VerifyModule(const v8::FunctionCallbackInfo<v8::Value>& args) {
   HandleScope scope(args.GetIsolate());
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate());
   ErrorThrower thrower(isolate, "WASM.verifyModule()");
 
   RawBuffer buffer = GetRawBufferArgument(thrower, args);
   if (thrower.error()) return;
 
-  i::Zone zone;
+  i::Zone zone(isolate->allocator());
   internal::wasm::ModuleResult result =
       internal::wasm::DecodeWasmModule(isolate, &zone, buffer.start, buffer.end,
                                        true, internal::wasm::kWasmOrigin);
 
   if (result.failed()) {
     thrower.Failed("", result);
   }
 
   if (result.val) delete result.val;
 }
 
 
 void VerifyFunction(const v8::FunctionCallbackInfo<v8::Value>& args) {
   HandleScope scope(args.GetIsolate());
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate());
   ErrorThrower thrower(isolate, "WASM.verifyFunction()");
 
   RawBuffer buffer = GetRawBufferArgument(thrower, args);
   if (thrower.error()) return;
 
   internal::wasm::FunctionResult result;
   {
     // Verification of a single function shouldn't allocate.
     i::DisallowHeapAllocation no_allocation;
-    i::Zone zone;
+    i::Zone zone(isolate->allocator());
     result = internal::wasm::DecodeWasmFunction(isolate, &zone, nullptr,
                                                 buffer.start, buffer.end);
   }
 
   if (result.failed()) {
     thrower.Failed("", result);
   }
 
   if (result.val) delete result.val;
 }
@@ skipping 38 matching lines @@
 
   i::Handle<i::JSArrayBuffer> memory = i::Handle<i::JSArrayBuffer>::null();
   if (args.Length() > 2 && args[2]->IsArrayBuffer()) {
     Local<Object> obj = Local<Object>::Cast(args[2]);
     i::Handle<i::Object> mem_obj = v8::Utils::OpenHandle(*obj);
     memory = i::Handle<i::JSArrayBuffer>(i::JSArrayBuffer::cast(*mem_obj));
   }
 
   // Decode but avoid a redundant pass over function bodies for verification.
   // Verification will happen during compilation.
-  i::Zone zone;
+  i::Zone zone(isolate->allocator());
   internal::wasm::ModuleResult result = internal::wasm::DecodeWasmModule(
       isolate, &zone, start, end, false, origin);
 
   if (result.failed() && origin == internal::wasm::kAsmJsOrigin) {
     thrower->Error("Asm.js converted module failed to decode");
   } else if (result.failed()) {
     thrower->Failed("", result);
   } else {
     // Success. Instantiate the module and return the object.
     i::Handle<i::JSObject> ffi = i::Handle<i::JSObject>::null();
@@ skipping 18 matching lines @@
   HandleScope scope(args.GetIsolate());
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate());
   ErrorThrower thrower(isolate, "WASM.instantiateModuleFromAsm()");
 
   if (!args[0]->IsString()) {
     thrower.Error("Asm module text should be a string");
     return;
   }
 
   i::Factory* factory = isolate->factory();
-  i::Zone zone;
+  i::Zone zone(isolate->allocator());
   Local<String> source = Local<String>::Cast(args[0]);
   i::Handle<i::Script> script = factory->NewScript(Utils::OpenHandle(*source));
   i::ParseInfo info(&zone, script);
 
   i::Handle<i::Object> foreign;
   if (args.Length() > 1 && args[1]->IsObject()) {
     Local<Object> local_foreign = Local<Object>::Cast(args[1]);
     foreign = v8::Utils::OpenHandle(*local_foreign);
   }
 
@@ skipping 94 matching lines @@
     int unused_property_fields = in_object_properties - pre_allocated;
     Handle<Map> map = Map::CopyInitialMap(
         prev_map, instance_size, in_object_properties, unused_property_fields);
 
     context->set_wasm_function_map(*map);
   }
 }
 
 }  // namespace internal
 }  // namespace v8