Bug 3562

Summary:	single-step sigreturn when trapped instruction is a breakpoint
Product:	frysk	Reporter:	Andrew Cagney <cagney>
Component:	general	Assignee:	Unassigned <frysk-bugzilla>
Status:	NEW ---
Severity:	normal
Priority:	P2
Version:	unspecified
Target Milestone:	---
Host:		Target:
Build:		Last reconfirmed:
Bug Depends on:
Bug Blocks:	1521, 1522

Description Andrew Cagney 2006-11-22 17:22:14 UTC

Check that single stepping the sig-return instruction, returning to the trapped
instruction in the callee, where that trapped instruction has been replaced by a
breakpoint, triggers bith the code and instruction observers, and doesn't go one
instruction too far.

Comment 1 Mark Wielaard 2007-02-13 13:31:24 UTC

Most of this is tested by the testStepping* variants in TestBreakpoints,
counters on both Instruction and Code observers are observed. An explicit test
could be added for "doesn't go one instruction too far".

Comment 2 Andrew Cagney 2007-02-15 14:26:20 UTC

Checking is is very important, kernel and code bugs if encountered in the past
have exibited exactly those edge case problems - executing the instruction,
continuing, ...