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* breakpoint.c (fetch_watchpoint_value): New function.

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(update_watchpoint): Set and clear val_valid.  Use
	fetch_watchpoint_value.  Handle unreadable values on the
	value chain.  Correct check for user-requested array watchpoints.
	(breakpoint_init_inferior): Clear val_valid.
	(watchpoint_value_print): New function.
	(print_it_typical): Use it.  Do not free or clear old_val.  Print
	watchpoints even if old_val == NULL.
	(watchpoint_check): Use fetch_watchpoint_value.  Check for values
	becoming readable or unreadable.
	(watch_command_1): Use fetch_watchpoint_value.  Set val_valid.
	(do_enable_watchpoint): Likewise.
	* breakpoint.h (struct breakpoint): Update comment for val.  Add
	val_valid.
	* NEWS: Mention watchpoints on inaccessible memory.

	* gdb.base/watchpoint.c (global_ptr, func4): New.
	(main): Call func4.
	* gdb.base/watchpoint.exp: Call test_inaccessible_watchpoint.
	(test_inaccessible_watchpoint): New.

	* gdb.texinfo (Set Watchpoints): Mention watchpoints on
	unreadable memory.  Delete obsolete SPARClite reference.
This commit is contained in:
Daniel Jacobowitz
2008-03-03 13:24:12 +00:00
parent 35d60fe406
commit fa4727a64f
9 changed files with 213 additions and 74 deletions
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7
gdb/breakpoint.h
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@@ -391,8 +391,13 @@ struct breakpoint
/* The largest block within which it is valid, or NULL if it is
valid anywhere (e.g. consists just of global symbols). */
struct block *exp_valid_block;
/* Value of the watchpoint the last time we checked it. */
/* Value of the watchpoint the last time we checked it, or NULL
when we do not know the value yet or the value was not
readable. VAL is never lazy. */
struct value *val;
/* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
then an error occurred reading the value. */
int val_valid;
/* Holds the address of the related watchpoint_scope breakpoint
when using watchpoints on local variables (might the concept