[wasm] OOB traps: build protected instruction list during codegen

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.
 // Do not include anything from src/compiler here!
 #include "src/compilation-info.h"
 #include "src/compiler.h"
+#include "src/wasm/wasm-module.h"
 #include "src/wasm/wasm-opcodes.h"
 #include "src/wasm/wasm-result.h"
 #include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
 
 namespace compiler {
 // Forward declarations for some compiler data structures.
 class Node;
@@ skipping 25 matching lines @@
   Zone* graph_zone() { return graph_zone_.get(); }
   int index() const { return index_; }
 
   void ExecuteCompilation();
   Handle<Code> FinishCompilation();
 
   static Handle<Code> CompileWasmFunction(wasm::ErrorThrower* thrower,
                                           Isolate* isolate,
                                           wasm::ModuleEnv* module_env,
                                           const wasm::WasmFunction* function) {
-    WasmCompilationUnit unit(thrower, isolate, module_env, function, 0);
+    WasmCompilationUnit unit(thrower, isolate, module_env, function,
+                             function->func_index);
     unit.ExecuteCompilation();
     return unit.FinishCompilation();
   }
 
  private:
   SourcePositionTable* BuildGraphForWasmFunction(double* decode_ms);
+  Handle<FixedArray> PackProtectedInstructions() const;
 
   wasm::ErrorThrower* thrower_;
   Isolate* isolate_;
   wasm::ModuleEnv* module_env_;
   const wasm::WasmFunction* function_;
   // The graph zone is deallocated at the end of ExecuteCompilation.
   std::unique_ptr<Zone> graph_zone_;
   JSGraph* jsgraph_;
   Zone compilation_zone_;
   CompilationInfo info_;
   std::unique_ptr<CompilationJob> job_;
   uint32_t index_;
   wasm::Result<wasm::DecodeStruct*> graph_construction_result_;
   bool ok_;
+  ProtectedInstructionList protected_instructions_;  // Instructions that are
+                                                     // protected by the signal
+                                                     // handler.
 
   DISALLOW_COPY_AND_ASSIGN(WasmCompilationUnit);
 };
 
 // Wraps a JS function, producing a code object that can be called from WASM.
 Handle<Code> CompileWasmToJSWrapper(Isolate* isolate, Handle<JSReceiver> target,
                                     wasm::FunctionSig* sig, uint32_t index,
                                     Handle<String> module_name,
                                     MaybeHandle<String> import_name);
 
@@ skipping 261 matching lines @@
   }
 
   int AddParameterNodes(Node** args, int pos, int param_count,
                         wasm::FunctionSig* sig);
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_