Obsolete Watchpoint Definition

An obsolete watchpoint definition is similar to a stop variable or stop memory breakpoint:

obsolete_watch_breakpoint_definition_command

        : watch obsolete_watch_detector

            [ obsolete_watch_modifiers ]

            [ breakpoint_actions ]

obsolete_watch_detector

        : variable variable_name

        | [ memory ] start_address_expression

        | [ memory ] start_address_expression , end_address_expression

        | [ memory ] start_address_expression : byte_count_expression

obsolete_watch_modifiers

        : [ access_modifier ]

          [ thread_filter ]

          [ within_modifier ]

          [ logical_filter ]

An obsolete watchpoint and a stop command differ in the following respects:

• The obsolete watchpoint command begins with watch instead of stop.
• The keyword memory is optional; if omitted, it is assumed.
• The order of filters and modifiers is different.

These differences are purely syntactic; the semantics are the same.

For example:

(idb) watch variable _firstNode write

[#3: watch variable _firstNode write]

(idb) cont

[3] Address 0xbfffc188 was accessed at:

void List<Node>::append(class Node* const): src/x_list.cxx

 [line 149, 0x0804c56d] append(class Node* const)+0x15:                 movl     %edx, (%eax)

0xbfffc188: Old value = 0x00000000

0xbfffc188: New value = 0x0805e5f8

[3] stopped at [void List<Node>::append(class Node* const):149 0x0804c56f]

    149         _firstNode = node;