breakpoints; thread/frame selection that should work; TODO: is slow

src/frontend/target.h

@@ -41,11 +41,41 @@ namespace dbgui::frontend
 			std::string display_name;
 		};
 
+		// TODO: need a way for the backend to report where the breakpoint was actually placed
+		// (might have been moved) or if it could be placed at all
+		// iow let the backend resolve the address + possible file location for the breakpoint
+		// and then display it
+		// this should be needed anyways when you want to add expression-based breakpoints, e.g. 'main'
 		struct Breakpoint
 		{
+			struct FileLoc
+			{
+				std::string name;
+				uint32_t line;
+			};
+
 			bool removed = false;
-			// TODO: srcloc
-			uint64_t addr;
+			std::variant<uint64_t, FileLoc> data;
+
+			bool at_addr(uint64_t addr) const
+			{
+				return this->data.index() == 0
+				       && std::get<uint64_t>(this->data) == addr;
+			}
+
+			bool at_file_loc(std::string_view file, uint32_t line) const
+			{
+				if (this->data.index() != 1)
+				{
+					return false;
+				}
+				const auto &loc = std::get<FileLoc>(this->data);
+				if (loc.line == line && loc.name == file)
+				{
+					return true;
+				}
+				return false;
+			}
 		};
 
 		Target(std::string filename);
@@ -55,6 +85,9 @@ namespace dbgui::frontend
 		uint64_t id;
 		size_t data_node_id = 0;
 		Arch arch;
+		bool step_instruction    = false;
+		uint16_t selected_thread = 0;
+		uint16_t selected_frame  = 0;
 
 		std::vector<RegSet> reg_sets;
 		std::vector<std::optional<Thread>> threads;