WIP: wasm oob trap handling experiments

src/wasm/wasm-module.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 <iostream>
 #include <memory>
 
 #include "src/base/atomic-utils.h"
 #include "src/code-stubs.h"
 
 #include "src/macro-assembler.h"
 #include "src/objects.h"
 #include "src/property-descriptor.h"
 #include "src/simulator.h"
 #include "src/snapshot/snapshot.h"
@@ skipping 413 matching lines @@
     }
   }
   return modified;
 }
 
 void LinkModuleFunctions(Isolate* isolate,
                          std::vector<Handle<Code>>& functions) {
   for (size_t i = 0; i < functions.size(); ++i) {
     Handle<Code> code = functions[i];
     LinkFunction(code, functions, Code::WASM_FUNCTION);
+
+    // Add this object to the signal handler table.
+    {
+      auto* handler_data = new wasm::TrapHandlerData;
+
+      handler_data->code = *code;
+
+      std::cerr << "*** STORING HANDLER DATA "
+                << reinterpret_cast<void*>(code->instruction_start()) << " ***"
+                << std::endl;
+
+      handler_data->next = wasm::gTrapHandlers;
+      wasm::gTrapHandlers = handler_data;
+      // TODO(eholk): make sure to clean all this up someday.
+    }
   }
 }
 
 void FlushAssemblyCache(Isolate* isolate, Handle<FixedArray> functions) {
   for (int i = 0; i < functions->length(); ++i) {
     Handle<Code> code = functions->GetValueChecked<Code>(isolate, i);
     Assembler::FlushICache(isolate, code->instruction_start(),
                            code->instruction_size());
   }
 }
@@ skipping 698 matching lines @@
     CompileSequentially(isolate, this,
                         temp_instance_for_compilation.function_code, thrower,
                         &module_env);
   }
   if (thrower->error()) return nothing;
 
   // At this point, compilation has completed. Update the code table.
   for (size_t i = FLAG_skip_compiling_wasm_funcs;
        i < temp_instance_for_compilation.function_code.size(); ++i) {
     Code* code = *temp_instance_for_compilation.function_code[i];
+
     compiled_functions->set(static_cast<int>(i), code);
   }
 
   // Create the compiled module object, and populate with compiled functions
   // and information needed at instantiation time. This object needs to be
   // serializable. Instantiation may occur off a deserialized version of this
   // object.
   Handle<FixedArray> ret =
       factory->NewFixedArray(kCompiledWasmObjectTableSize, TENURED);
   ret->set(kFunctions, *compiled_functions);
@@ skipping 555 matching lines @@
     return static_cast<int32_t>(HeapNumber::cast(*result)->value());
   }
   thrower->Error("WASM.compileRun() failed: Return value should be number");
   return -1;
 }
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8