Extend gdb-jit support (OSX/locals+parameters/prettyprint)

samples/gdb-integration.js

Index: samples/gdb-integration.js
diff --git a/samples/gdb-integration.js b/samples/gdb-integration.js
new file mode 100644
index 0000000000000000000000000000000000000000..fa97cc48ad5b084dc467e849ce5c80235602e79b
--- /dev/null
+++ b/samples/gdb-integration.js
@@ -0,0 +1,26 @@
+function Initialize() { }
+
+function ProcessLine(input_line) {
+  return ">>>" + input_line + "<<<";
+}
+
+function gdbSomeFunction(va, vb, vc) {
+  var lva = va;
+  var lvb = vb;
+  var lvc = vc;
+  debug_break();
+  return v + 1;
+}
+
+while (true) {
+  var result = gdbSomeFunction(42, -42, 0xBAADF00DCAFE);
+  print(result);
+  debug_break();
+  var line = read_line();
+  if (!line) {
+    break;
+  }
+  var res = line + " | " + line;
+  print(res);
+}
+