[wasm] Add stack checks at the beginning of each function.

src/compiler/wasm-compiler.h

 // 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.
 
 #ifndef V8_COMPILER_WASM_COMPILER_H_
 #define V8_COMPILER_WASM_COMPILER_H_
 
 #include <memory>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
@@ skipping 119 matching lines @@
   Node* HeapConstant(Handle<HeapObject> value);
   Node* Binop(wasm::WasmOpcode opcode, Node* left, Node* right,
               wasm::WasmCodePosition position = wasm::kNoCodePosition);
   Node* Unop(wasm::WasmOpcode opcode, Node* input,
              wasm::WasmCodePosition position = wasm::kNoCodePosition);
   unsigned InputCount(Node* node);
   bool IsPhiWithMerge(Node* phi, Node* merge);
   void AppendToMerge(Node* merge, Node* from);
   void AppendToPhi(Node* phi, Node* from);
 
+  void StackCheck(wasm::WasmCodePosition position);
+
   //-----------------------------------------------------------------------
   // Operations that read and/or write {control} and {effect}.
   //-----------------------------------------------------------------------
   Node* Branch(Node* cond, Node** true_node, Node** false_node);
   Node* Switch(unsigned count, Node* key);
   Node* IfValue(int32_t value, Node* sw);
   Node* IfDefault(Node* sw);
   Node* Return(unsigned count, Node** vals);
   Node* ReturnVoid();
   Node* Unreachable(wasm::WasmCodePosition position);
@@ skipping 183 matching lines @@
     Node** buf = Buffer(new_count);
     if (buf != buffer) memcpy(buf, buffer, old_count * sizeof(Node*));
     return buf;
   }
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_