Using segfault-handler to help debugging C++ crashes. (#1834)

* Using segfault-handler to help debugging C++ crashes.
* Only use segfault-handler in node environments.

.gitignore

@@ -57,3 +57,4 @@ build.log.*
 realm-object-server/
 tests/react-test-app/ios/out.txt
 *.iml
+crash.log

tests/js/index.js

@@ -20,7 +20,6 @@
 
 const Realm = require('realm');
 
-
 if( typeof Realm.Sync !== 'undefined' && Realm.Sync !== null ) {
     global.WARNING = "global is not available in React Native. Use it only in tests";
     global.enableSyncTests = true;
@@ -34,6 +33,12 @@ if (isNodeProcess && process.platform === 'win32') {
     global.enableSyncTests = false;
 }
 
+// catching segfaults during testing can help debugging
+if (isNodeProcess) {
+    const SegfaultHandler = node_require('segfault-handler');
+    SegfaultHandler.registerHandler("crash.log");
+}
+
 var TESTS = {
     ListTests: require('./list-tests'),
     LinkingObjectsTests: require('./linkingobjects-tests'),

tests/package.json

@@ -8,6 +8,7 @@
     "jasmine-console-reporter": "^1.2.7",
     "jasmine-reporters": "^2.2.0",
     "needle": "^1.3.0",
+    "segfault-handler": "^1.0.1",
     "terminate": "^1.0.8",
     "tmp": "^0.0.30",
     "url-parse": "^1.1.7",