Bug 7349

Summary:	RFE: Can't refer to previous watchpoint value in condition
Product:	gdb	Reporter:	Alex Oliva <aoliva>
Component:	breakpoints	Assignee:	Not yet assigned to anyone <unassigned>
Status:	ASSIGNED ---
Severity:	enhancement	CC:	cebtenzzre, dimhen, gdb-prs, tromey, vries
Priority:	P3
Version:	unknown
Target Milestone:	---
Host:		Target:
Build:		Last reconfirmed:

Description Alex Oliva 2001-11-17 03:38:01 UTC

[Converted from Gnats 244]

It woudl be very nice if we could reference the current and previous values of a watchpoint in the watchpoint condition.  Say:

watch *bitmask_ptr
cond # ($ ^ $$) & 1

this would only stop if bit 0 changed in the bitmask.

Release:
unknown

Comment 1 Tom Tromey 2017-02-17 13:06:53 UTC

Came up again here:
http://stackoverflow.com/questions/42287337/programmatic-access-to-old-and-new-values-of-a-watchpoint-in-gdb/42298779#42298779

Comment 2 Tom de Vries 2024-07-31 10:24:41 UTC

*** Bug 29480 has been marked as a duplicate of this bug. ***