[wasm] Initial signal handler

src/d8.cc

 // Copyright 2012 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 <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 
 #include <algorithm>
@@ skipping 17 matching lines @@
 #include "src/base/logging.h"
 #include "src/base/platform/platform.h"
 #include "src/base/platform/time.h"
 #include "src/base/sys-info.h"
 #include "src/basic-block-profiler.h"
 #include "src/interpreter/interpreter.h"
 #include "src/list-inl.h"
 #include "src/msan.h"
 #include "src/objects-inl.h"
 #include "src/snapshot/natives.h"
+#include "src/trap-handler/trap-handler.h"
 #include "src/utils.h"
 #include "src/v8.h"
 
 #ifdef V8_INSPECTOR_ENABLED
 #include "include/v8-inspector.h"
 #endif  // V8_INSPECTOR_ENABLED
 
 #if !defined(_WIN32) && !defined(_WIN64)
 #include <unistd.h>  // NOLINT
 #else
@@ skipping 2805 matching lines @@
       base::SysInfo::AmountOfPhysicalMemory(),
       base::SysInfo::AmountOfVirtualMemory());
 
   Shell::counter_map_ = new CounterMap();
   if (i::FLAG_dump_counters || i::FLAG_dump_counters_nvp || i::FLAG_gc_stats) {
     create_params.counter_lookup_callback = LookupCounter;
     create_params.create_histogram_callback = CreateHistogram;
     create_params.add_histogram_sample_callback = AddHistogramSample;
   }
 
+  if (i::FLAG_wasm_trap_handler) {
+    if (!v8::V8::RegisterDefaultSignalHandler()) {
+      fprintf(stderr, "Could not register signal handler");
+      exit(1);
+    }
+  }
+
   Isolate* isolate = Isolate::New(create_params);
   {
     Isolate::Scope scope(isolate);
     Initialize(isolate);
     PerIsolateData data(isolate);
 
     if (options.trace_enabled) {
       platform::tracing::TraceConfig* trace_config;
       if (options.trace_config) {
         int size = 0;
@@ skipping 76 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif