debugger: Handles errors when analyzing semantically a module at runtime (avoids...
[nit.git] / src / debugger.nit
index 46750fc..b16a797 100644 (file)
@@ -19,21 +19,48 @@ module debugger
 
 import breakpoint
 intrude import naive_interpreter
+import nitx
+intrude import toolcontext
 
 redef class ToolContext
+       private var dbg: nullable Debugger = null
+
+       private var had_error: Bool = false
+
+       redef fun check_errors
+       do
+               if dbg == null then
+                       super
+               else
+                       if messages.length > 0 then
+                               message_sorter.sort(messages)
+
+                               for m in messages do
+                                       if "Warning".search_in(m.text, 0) == null then had_error = true
+                                       stderr.write("{m.to_color_string}\n")
+                               end
+                       end
+
+                       messages.clear
+               end
+       end
+
        # -d
        var opt_debugger_mode: OptionBool = new OptionBool("Launches the target program with the debugger attached to it", "-d")
+       # -c
+       var opt_debugger_autorun: OptionBool = new OptionBool("Launches the target program with the interpreter, such as when the program fails, the debugging prompt is summoned", "-c")
 
        redef init
        do
                super
                self.option_context.add_option(self.opt_debugger_mode)
+               self.option_context.add_option(self.opt_debugger_autorun)
        end
 end
 
 redef class ModelBuilder
-       # Execute the program from the entry point (Sys::main) of the `mainmodule'
-       # `arguments' are the command-line arguments in order
+       # Execute the program from the entry point (Sys::main) of the `mainmodule`
+       # `arguments` are the command-line arguments in order
        # REQUIRE that:
        #   1. the AST is fully loaded.
        #   2. the model is fully built.
@@ -50,9 +77,23 @@ redef class ModelBuilder
                var time1 = get_time
                self.toolcontext.info("*** END INTERPRETING: {time1-time0} ***", 2)
        end
+
+       fun run_debugger_autorun(mainmodule: MModule, arguments: Array[String])
+       do
+               var time0 = get_time
+               self.toolcontext.info("*** START INTERPRETING ***", 1)
+
+               var interpreter = new Debugger(self, mainmodule, arguments)
+               interpreter.autocontinue = true
+
+               init_naive_interpreter(interpreter, mainmodule)
+
+               var time1 = get_time
+               self.toolcontext.info("*** END INTERPRETING: {time1-time0} ***", 2)
+       end
 end
 
-# The class extending NaiveInterpreter by adding debugging methods
+# The class extending `NaiveInterpreter` by adding debugging methods
 class Debugger
        super NaiveInterpreter
 
@@ -93,6 +134,9 @@ class Debugger
        # If it is not, then, the remapping won't be happening
        var frame_count_aftermath = 1
 
+       # Auto continues the execution until the end or until an error is encountered
+       var autocontinue = false
+
        #######################################################################
        ##                  Execution of statement function                  ##
        #######################################################################
@@ -106,16 +150,18 @@ class Debugger
                var old = frame.current_node
                frame.current_node = n
 
-               if not n isa ABlockExpr then
-                       steps_fun_call(n)
+               if not self.autocontinue then
+                       if not n isa ABlockExpr then
+                               steps_fun_call(n)
 
-                       breakpoint_check(n)
+                               breakpoint_check(n)
 
-                       check_funcall_and_traced_args(n)
+                               check_funcall_and_traced_args(n)
 
-                       remap(n)
+                               remap(n)
 
-                       check_if_vars_are_traced(n)
+                               check_if_vars_are_traced(n)
+                       end
                end
 
                n.stmt(self)
@@ -128,16 +174,16 @@ class Debugger
                if self.stop_after_step_over_trigger then
                        if self.frames.length <= self.step_stack_count then
                                n.debug("Execute stmt {n.to_s}")
-                               while process_debug_command(gets) do end
+                               while read_cmd do end
                        end
                else if self.stop_after_step_out_trigger then
                        if frames.length < self.step_stack_count then
                                n.debug("Execute stmt {n.to_s}")
-                               while process_debug_command(gets) do end
+                               while read_cmd do end
                        end
                else if step_in_trigger then
                        n.debug("Execute stmt {n.to_s}")
-                       while process_debug_command(gets) do end
+                       while read_cmd do end
                end
        end
 
@@ -160,7 +206,7 @@ class Debugger
                        end
 
                        n.debug("Execute stmt {n.to_s}")
-                       while process_debug_command(gets) do end
+                       while read_cmd do end
                end
        end
 
@@ -175,7 +221,7 @@ class Debugger
                        for j in self.traces do
                                if j.is_variable_traced_in_frame(i, frame) then
                                        n.debug("Traced variable {i} used")
-                                       if j.break_on_encounter then while process_debug_command(gets) do end
+                                       if j.break_on_encounter then while read_cmd do end
                                        break
                                end
                        end
@@ -227,6 +273,12 @@ class Debugger
        ##                   Processing commands functions                   ##
        #######################################################################
 
+       fun read_cmd: Bool
+       do
+               printn "> "
+               return process_debug_command(gets)
+       end
+
        # Takes a user command as a parameter
        #
        # Returns a boolean value, representing whether or not to
@@ -250,6 +302,10 @@ class Debugger
                # Step-over command
                else if command == "n" then
                        return step_over
+               # Opens a new NitIndex prompt on current model
+               else if command == "nitx" then
+                       new NitIndex.with_infos(modelbuilder, self.mainmodule).prompt
+                       return true
                # Continues execution until the end
                else if command == "c" then
                        return continue_exec
@@ -349,6 +405,8 @@ class Debugger
                        end
 
                        print "\nEnd of current instruction \n"
+               else if parts_of_command[1] == "stack" then
+                       print self.stack_trace
                else if parts_of_command[1].has('[') and parts_of_command[1].has(']') then
                        process_array_command(parts_of_command)
                else
@@ -503,6 +561,7 @@ class Debugger
 
        # Effectively untraces the variable called *variable_name*
        #
+       # Returns true if the variable exists, false otherwise
        private fun untrace_variable(variable_name: String): Bool
        do
                var to_remove: nullable TraceObject = null
@@ -688,6 +747,8 @@ class Debugger
        # If it is a primitive type, its value is directly printed
        fun print_instance(instance: Instance)
        do
+               print "Printing innards of a variable"
+
                if instance isa MutableInstance then
                        var attributes = instance.attributes
                        print "Object : {instance}"
@@ -698,6 +759,8 @@ class Debugger
                else
                        print "Found variable {instance}"
                end
+
+               print "Stopping printing innards of a variable"
        end
 
        # Prints the attributes demanded in a SequenceRead
@@ -1131,6 +1194,7 @@ class Debugger
                print "[p/print] variable : [p/print] * shows the status of all the variables\n"
                print "[p/print] variable[i] : Prints the value of the variable contained at position *i* in SequenceRead collection *variable*\n"
                print "[p/print] variable[i..j]: Prints the value of all the variables contained between positions *i* and *j* in SequenceRead collection *variable*\n"
+               print "[p/print] stack: Prints a stack trace at current instruction\n"
                print "Note : The arrays can be multi-dimensional (Ex : variable[i..j][k] will print all the values at position *k* of all the SequenceRead collections contained between positions *i* and *j* in SequenceRead collection *variable*)\n"
                print "s : steps in on the current function\n"
                print "n : steps-over the current instruction\n"