Add pending breakpoints feature to python debugger client (#1810)

- Support to add pending breakpoints
 - Add fbreak command for the prompt
 - Manage this breakpoints
 - Add tests for it

JerryScript-DCO-1.0-Signed-off-by: Levente Orban orbanl@inf.u-szeged.hu

jerry-debugger/jerry-client-ws.py

@@ -159,12 +159,6 @@ class DebuggerPrompt(Cmd):
     def postcmd(self, stop, line):
         return self.stop
 
-    def insert_breakpoint(self, args):
-        if args == "":
-            print("Error: Breakpoint index expected")
-        else:
-            set_breakpoint(self.debugger, args)
-
     def disable_args(self, args):
         if args:
             print("Error: No argument expected")
@@ -180,11 +174,21 @@ class DebuggerPrompt(Cmd):
         self.quit = True
 
     def do_break(self, args):
-        """ Insert breakpoints on the given lines """
+        """ Insert breakpoints on the given lines or functions """
-        self.insert_breakpoint(args)
+        if args == "":
+            print("Error: Breakpoint index expected")
+        else:
+            set_breakpoint(self.debugger, False, args)
 
     do_b = do_break
 
+    def do_fbreak(self, args):
+        """ Insert breakpoints on the given lines or functions, if not found add the pending list """
+        if args == "":
+            print("Error: Breakpoint index expected")
+        else:
+            set_breakpoint(self.debugger, True, args)
+
     def exec_command(self, args, command_id):
         self.stop = True
         if args != "":
@@ -217,8 +221,10 @@ class DebuggerPrompt(Cmd):
     do_n = do_next
 
     def do_list(self, args):
-        """ Lists the available breakpoints """
+        """ Lists the available breakpoints, use 'pending' to list all the available pending breakpoints """
-        if self.disable_args(args):
+        if args == "pending":
+            for index, breakpoint in enumerate(self.debugger.pending_breakpoint_list):
+                print("%d: %s" % (index, breakpoint))
             return
 
         for breakpoint in self.debugger.active_breakpoint_list.values():
@@ -250,6 +256,28 @@ class DebuggerPrompt(Cmd):
             else:
                 print("Error: Breakpoint %d not found" % (breakpoint_index))
 
+    def do_pendingdel(self, args):
+        """ Delete the given pending breakpoints from the list """
+        if not args:
+            print("Error: Pending breakpoint index expected")
+            return
+
+        else:
+            try:
+                breakpoint_index = int(args)
+            except ValueError as val_errno:
+                print("Error: Integer number expectes, %s" % (val_errno))
+                return
+
+            if breakpoint_index <= len(self.debugger.pending_breakpoint_list):
+                try:
+                    del self.debugger.pending_breakpoint_list[breakpoint_index]
+                except IndexError as index_errno:
+                    print("Error: Index not found, %s" % (index_errno))
+                    return
+            else:
+                print("Error: Pending breakpoint %d not found" % (breakpoint_index))
+
     def exec_backtrace(self, args):
         max_depth = 0
 
@@ -408,6 +436,7 @@ class JerryDebugger(object):
         self.last_breakpoint_hit = None
         self.next_breakpoint_index = 0
         self.active_breakpoint_list = {}
+        self.pending_breakpoint_list = []
         self.line_list = Multimap()
         self.client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         self.client_socket.connect((self.host, self.port))
@@ -678,6 +707,17 @@ def parse_source(debugger, data):
         for line, breakpoint in function.lines.items():
             debugger.line_list.insert(line, breakpoint)
 
+    # Try to set the pending breakpoints
+    if len(debugger.pending_breakpoint_list) != 0:
+        logging.debug("Pending breakpoints list: %s", debugger.pending_breakpoint_list)
+
+        for breakpoint in debugger.pending_breakpoint_list:
+            if isinstance(breakpoint, int):
+                breakpoint = source_code_name + ":" + str(breakpoint)
+            set_breakpoint(debugger, False, breakpoint)
+    else:
+        logging.debug("No pending breakpoints")
+
 
 def release_function(debugger, data):
     byte_code_cp = struct.unpack(debugger.byte_order + debugger.cp_format,
@@ -708,7 +748,7 @@ def enable_breakpoint(debugger, breakpoint):
     print ("Breakpoint %d at %s" % (breakpoint.active_index, breakpoint))
 
 
-def set_breakpoint(debugger, string):
+def set_breakpoint(debugger, pending, string):
     line = re.match("(.*):(\\d+)$", string)
     found = False
 
@@ -733,7 +773,13 @@ def set_breakpoint(debugger, string):
 
     if not found:
         print("Breakpoint not found")
-        return
+        if pending:
+            if line:
+                debugger.pending_breakpoint_list.append(line)
+            else:
+                debugger.pending_breakpoint_list.append(string)
+            print ("Pending breakpoint added")
+    return
 
 
 def get_breakpoint(debugger, breakpoint_data):

tests/debugger/do_help.expected

@@ -4,7 +4,8 @@ Stopped at tests/debugger/do_help.js:15
 
 Documented commands (type help <topic>):
 ========================================
-b          break  c         delete  e     exception  list  next  s    step
+b          bt        delete  eval       help  next        s   
-backtrace  bt     continue  dump    eval  help       n     quit  src
+backtrace  c         dump    exception  list  pendingdel  src 
+break      continue  e       fbreak     n     quit        step
 
 (jerry-debugger) quit

tests/debugger/do_pending_breakpoints.cmd

@@ -0,0 +1,6 @@
+fbreak f
+list pending
+n
+n
+c
+c

tests/debugger/do_pending_breakpoints.expected

@@ -0,0 +1,16 @@
+Connecting to: localhost:5001
+Stopped at tests/debugger/do_pending_breakpoints.js:15
+(jerry-debugger) fbreak f
+Breakpoint not found
+Pending breakpoint added
+(jerry-debugger) list pending
+0: f
+(jerry-debugger) n
+Stopped at tests/debugger/do_pending_breakpoints.js:17
+(jerry-debugger) n
+Breakpoint 1 at <unknown>:1 (in f() at line:1, col:1)
+Stopped at tests/debugger/do_pending_breakpoints.js:19
+(jerry-debugger) c
+Stopped at breakpoint:1 <unknown>:1 (in f() at line:1, col:1)
+(jerry-debugger) c
+Connection closed.

tests/debugger/do_pending_breakpoints.js

@@ -0,0 +1,21 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+print("pending-breakpoints");
+
+eval("function f(){ return 5 }");
+
+var bird = "colibri";
+f();
+var a = 234;

tests/debugger/do_pending_list.cmd

@@ -0,0 +1,6 @@
+fbreak do_pending_breakpoints.js:50
+fbreak do_pending_breakpoints.js:235532
+fbreak do_pending_breakpoints.js:2145
+n
+list pending
+c

tests/debugger/do_pending_list.expected

@@ -0,0 +1,18 @@
+Connecting to: localhost:5001
+Stopped at tests/debugger/do_pending_list.js:15
+(jerry-debugger) fbreak do_pending_breakpoints.js:50
+Breakpoint not found
+Pending breakpoint added
+(jerry-debugger) fbreak do_pending_breakpoints.js:235532
+Breakpoint not found
+Pending breakpoint added
+(jerry-debugger) fbreak do_pending_breakpoints.js:2145
+Breakpoint not found
+Pending breakpoint added
+(jerry-debugger) n
+Stopped at tests/debugger/do_pending_list.js:17
+(jerry-debugger) list pending
+0: 50
+1: 235532
+2: 2145
+(jerry-debugger) c

tests/debugger/do_pending_list.js

@@ -0,0 +1,20 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+print("pending breakpoints list");
+
+var x = 10;
+var y = 10;
+var pi = 3.14;
+var z = x + y;