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* value.h (struct value) <lazy>: Add a comment about its use for

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watchpoints.
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Eli Zaretskii 2000-08-16 08:03:43 +00:00
parent 31612ca61a
commit d7491b3f51
2 changed files with 17 additions and 1 deletions
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gdb/ChangeLog
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@ -1,3 +1,8 @@
2000-08-16 Eli Zaretskii <eliz@is.elta.co.il>
* value.h (struct value) <lazy>: Add a comment about its use for
watchpoints.
2000-08-12 Kevin Buettner <kevinb@redhat.com>
* cxux-nat.c (fetch_inferior_registers): Protoize.

13
gdb/value.h
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@ -97,7 +97,18 @@ struct value
/* If zero, contents of this value are in the contents field.
If nonzero, contents are in inferior memory at address
in the location.address field plus the offset field
(and the lval field should be lval_memory). */
(and the lval field should be lval_memory).
WARNING: This field is used by the code which handles
watchpoints (see breakpoint.c) to decide whether a particular
value can be watched by hardware watchpoints. If the lazy flag
is set for some member of a value chain, it is assumed that
this member of the chain doesn't need to be watched as part of
watching the value itself. This is how GDB avoids watching the
entire struct or array when the user wants to watch a single
struct member or array element. If you ever change the way
lazy flag is set and reset, be sure to consider this use as
well! */
char lazy;
/* If nonzero, this is the value of a variable which does not
actually exist in the program. */