src: fix gcc/clang warnings

fanatid · mmarchini · commit 84eefb45938b · 2019-09-25T14:05:01.000-07:00
PR-URL: #297 Reviewed-By: Matheus Marchini <mat@mmarchini.me>
diff --git a/src/llnode.cc b/src/llnode.cc
@@ -477,8 +477,7 @@ bool PluginInitialize(SBDebugger d) {
 
   setPropertyCmd.AddCommand("color", new llnode::SetPropertyColorCmd(),
                             "Set color property value");
-  setPropertyCmd.AddCommand("tree-padding",
-                            new llnode::SetTreePaddingCmd(&llv8),
+  setPropertyCmd.AddCommand("tree-padding", new llnode::SetTreePaddingCmd(),
                             "Set tree-padding value");
 
   interpreter.AddCommand("findjsobjects", new llnode::FindObjectsCmd(&llscan),
diff --git a/src/llnode.h b/src/llnode.h
@@ -32,14 +32,10 @@ class SetPropertyColorCmd : public CommandBase {
 
 class SetTreePaddingCmd : public CommandBase {
  public:
-  SetTreePaddingCmd(v8::LLV8* llv8) : llv8_(llv8) {}
   ~SetTreePaddingCmd() override {}
 
   bool DoExecute(lldb::SBDebugger d, char** cmd,
                  lldb::SBCommandReturnObject& result) override;
-
- private:
-  v8::LLV8* llv8_;
 };
 
 class PrintCmd : public CommandBase {
diff --git a/src/llscan.cc b/src/llscan.cc
@@ -647,7 +647,7 @@ void FindReferencesCmd::PrintRecursiveReferences(
     std::stringstream seen_str;
     seen_str << rang::fg::red << " [seen above]" << rang::fg::reset
              << std::endl;
-    result.Printf(seen_str.str().c_str());
+    result.Printf("%s", seen_str.str().c_str());
   } else {
     visited_references->push_back(address);
     v8::Value value(llscan_->v8(), address);
diff --git a/src/llv8.cc b/src/llv8.cc
@@ -111,7 +111,11 @@ double LLV8::LoadDouble(int64_t addr, Error& err) {
   }
 
   err = Error::Ok();
-  return *reinterpret_cast<double*>(&value);
+  // dereferencing type-punned pointer will break strict-aliasing rules
+  // return *reinterpret_cast<double*>(&value);
+  double dvalue;
+  std::memcpy(&dvalue, &value, sizeof(double));
+  return dvalue;
 }
 
 
@@ -1288,8 +1292,8 @@ StackTrace::StackTrace(JSArray frame_array, Error& err)
     if ((len_ != 0) ||
         ((frame_array_.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: %d "
+          "array_len: %ld",
           len_, frame_array_.GetArrayLength(err));
       len_ = -1;
       multiplier_ = -1;
