travis: enforce -Werror

.travis.yml

@@ -1,4 +1,6 @@
 language: node_js
+env:
+  CXXFLAGS="-Werror"
 matrix:
   include:
     #################

src/llscan.cc

@@ -553,7 +553,8 @@ bool FindReferencesCmd::DoExecute(SBDebugger d, char** cmd,
      * - Objects that refer to a particular string literal.
      *   (lldb) findreferences -s "Hello World!"
      */
-    case ScanType::kBadOption: {
+    case ScanType::kBadOption:
+    default: {
       result.SetError("Invalid search type");
       result.SetStatus(eReturnStatusFailed);
       return false;
@@ -1540,7 +1541,6 @@ inline static ByteOrder GetHostByteOrder() {
 }
 
 void LLScan::ScanMemoryRanges(FindJSObjectsVisitor& v) {
-  bool done = false;
 
   const uint64_t addr_size = process_.GetAddressByteSize();
   bool swap_bytes = process_.GetByteOrder() != GetHostByteOrder();
@@ -1550,6 +1550,7 @@ void LLScan::ScanMemoryRanges(FindJSObjectsVisitor& v) {
   unsigned char* block = new unsigned char[block_size];
 
 #ifndef LLDB_SBMemoryRegionInfoList_h_
+  bool done = false;
   MemoryRange* head = ranges_;
 
   while (head != nullptr && !done) {
@@ -1614,7 +1615,9 @@ void LLScan::ScanMemoryRanges(FindJSObjectsVisitor& v) {
       }
 
       if (increment == 0) {
+#ifndef LLDB_SBMemoryRegionInfoList_h_
         done = true;
+#endif  // LLDB_SBMemoryRegionInfoList_h_
         break;
       }
     }

src/llv8.cc

@@ -99,9 +99,9 @@ int64_t LLV8::LoadUnsigned(int64_t addr, uint32_t byte_size, Error& err) {
 
 double LLV8::LoadDouble(int64_t addr, Error& err) {
   SBError sberr;
-  int64_t value = process_.ReadUnsignedFromMemory(static_cast<addr_t>(addr),
-                                                  sizeof(double), sberr);
-  if (sberr.Fail()) {
+  double value;
+  size_t result = process_.ReadMemory(static_cast<addr_t>(addr), &value, sizeof(double), sberr);
+  if (sberr.Fail() || result != sizeof(double)) {
     err = Error::Failure(
         "Failed to load double from v8 memory, "
         "addr=0x%016" PRIx64,
@@ -110,7 +110,7 @@ double LLV8::LoadDouble(int64_t addr, Error& err) {
   }
 
   err = Error::Ok();
-  return *reinterpret_cast<double*>(&value);
+  return value;
 }
 
 
@@ -1108,9 +1108,7 @@ Value JSObject::GetDescriptorProperty(std::string key_name, Map map,
 
     if (descriptors.IsConstFieldDetails(details) ||
         descriptors.IsDescriptorDetails(details)) {
-      Value value;
-
-      value = descriptors.GetValue(i, err);
+      descriptors.GetValue(i, err);
       if (err.Fail()) return Value();
 
       continue;
@@ -1127,11 +1125,10 @@ Value JSObject::GetDescriptorProperty(std::string key_name, Map map,
     int64_t index = descriptors.FieldIndex(details) - in_object_count;
 
     if (descriptors.IsDoubleField(details)) {
-      double value;
       if (index < 0) {
-        value = GetInObjectValue<double>(instance_size, index, err);
+        GetInObjectValue<double>(instance_size, index, err);
       } else {
-        value = extra_properties.Get<double>(index, err);
+        extra_properties.Get<double>(index, err);
       }
 
       if (err.Fail()) return Value();

src/printer.cc

@@ -615,8 +615,8 @@ std::string Printer::Stringify(v8::JSError js_error, Error& err) {
       if ((stack_len != 0) ||
           ((arr.GetArrayLength(err) - 1) % multiplier != 0)) {
         Error::PrintInDebugMode(
-            "JSArray doesn't look like a Stack Frames array. stack_len: %lld "
-            "array_len: %lld",
+            "JSArray doesn't look like a Stack Frames array. stack_len: %" PRId64 " "
+            "array_len: %" PRId64,
             stack_len, arr.GetArrayLength(err));
         output << rang::fg::yellow << ">" << rang::fg::reset;
         return output.str();