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

test/unittests/wasm/encoder-unittest.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 "test/unittests/test-utils.h"
 
 #include "src/v8.h"
 
 #include "src/wasm/ast-decoder.h"
 #include "src/wasm/encoder.h"
@@ skipping 34 matching lines @@
     const std::vector<uint8_t> result = UnsignedLEB128From(input);
     CHECK_EQ(result.size(), length);
     for (int i = 0; i < length; i++) {
       CHECK_EQ(result.at(i), vals[i]);
     }
   }
 };
 
 
 TEST_F(EncoderTest, Function_Builder_Variable_Indexing) {
-  Zone zone;
+  ZoneForTesting zone;
   WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone);
   uint16_t f_index = builder->AddFunction();
   WasmFunctionBuilder* function = builder->FunctionAt(f_index);
   uint16_t local_f32 = function->AddLocal(kAstF32);
   uint16_t param_float32 = function->AddParam(kAstF32);
   uint16_t local_i32 = function->AddLocal(kAstI32);
   uint16_t local_f64 = function->AddLocal(kAstF64);
   uint16_t local_i64 = function->AddLocal(kAstI64);
   uint16_t param_int32 = function->AddParam(kAstI32);
   uint16_t local_i32_2 = function->AddLocal(kAstI32);
@@ skipping 17 matching lines @@
   WasmFunctionEncoder* f = function->Build(&zone, builder);
   ZoneVector<uint8_t> buffer_vector(f->HeaderSize() + f->BodySize(), &zone);
   byte* buffer = &buffer_vector[0];
   byte* header = buffer;
   byte* body = buffer + f->HeaderSize();
   f->Serialize(buffer, &header, &body);
 }
 
 
 TEST_F(EncoderTest, Function_Builder_Indexing_Variable_Width) {
-  Zone zone;
+  ZoneForTesting zone;
   WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone);
   uint16_t f_index = builder->AddFunction();
   WasmFunctionBuilder* function = builder->FunctionAt(f_index);
   for (size_t i = 0; i < 128; i++) {
     AddLocal(function, kAstF32);
   }
   AddLocal(function, kAstI32);
 
   WasmFunctionEncoder* f = function->Build(&zone, builder);
   ZoneVector<uint8_t> buffer_vector(f->HeaderSize() + f->BodySize(), &zone);
   byte* buffer = &buffer_vector[0];
   byte* header = buffer;
   byte* body = buffer + f->HeaderSize();
   f->Serialize(buffer, &header, &body);
   body = buffer + f->HeaderSize();
 }
 
 TEST_F(EncoderTest, Function_Builder_Block_Variable_Width) {
-  Zone zone;
+  ZoneForTesting zone;
   WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone);
   uint16_t f_index = builder->AddFunction();
   WasmFunctionBuilder* function = builder->FunctionAt(f_index);
   function->EmitWithVarInt(kExprBlock, 200);
   for (int i = 0; i < 200; ++i) {
     function->Emit(kExprNop);
   }
 
   WasmFunctionEncoder* f = function->Build(&zone, builder);
   CHECK_EQ(f->BodySize(), 204);
 }
 
 TEST_F(EncoderTest, Function_Builder_EmitEditableVarIntImmediate) {
-  Zone zone;
+  ZoneForTesting zone;
   WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone);
   uint16_t f_index = builder->AddFunction();
   WasmFunctionBuilder* function = builder->FunctionAt(f_index);
   function->Emit(kExprLoop);
   uint32_t offset = function->EmitEditableVarIntImmediate();
   for (int i = 0; i < 200; ++i) {
     function->Emit(kExprNop);
   }
   function->EditVarIntImmediate(offset, 200);
 
   WasmFunctionEncoder* f = function->Build(&zone, builder);
   CHECK_EQ(f->BodySize(), 204);
 }
 
 TEST_F(EncoderTest, Function_Builder_EmitEditableVarIntImmediate_Locals) {
-  Zone zone;
+  ZoneForTesting zone;
   WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone);
   uint16_t f_index = builder->AddFunction();
   WasmFunctionBuilder* function = builder->FunctionAt(f_index);
   function->Emit(kExprBlock);
   uint32_t offset = function->EmitEditableVarIntImmediate();
   for (int i = 0; i < 200; ++i) {
     AddLocal(function, kAstI32);
   }
   function->EditVarIntImmediate(offset, 200);
 
@@ skipping 51 matching lines @@
   leb_value[0] = 0x80;
   leb_value[1] = 0x80;
   leb_value[2] = 0x80;
   leb_value[3] = 0x80;
   leb_value[4] = 0x80;
   CheckReadValue(leb_value, -1, -1, kInvalidLEB128);
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8