Module Name: src
Committed By: kamil
Date: Mon Feb 13 15:29:18 UTC 2017
Modified Files:
src/doc: TODO.ptrace
Log Message:
Update TODO.ptrace
Note BSD4.4-like /proc debugging removal
Explain kevent(2)-based debugging proposal
Sponsored by <The NetBSD Foundation>
To generate a diff of this commit:
cvs rdiff -u -r1.19 -r1.20 src/doc/TODO.ptrace
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/doc/TODO.ptrace
diff -u src/doc/TODO.ptrace:1.19 src/doc/TODO.ptrace:1.20
--- src/doc/TODO.ptrace:1.19 Sun Feb 12 06:16:33 2017
+++ src/doc/TODO.ptrace Mon Feb 13 15:29:18 2017
@@ -1,4 +1,4 @@
-$NetBSD: TODO.ptrace,v 1.19 2017/02/12 06:16:33 kamil Exp $
+$NetBSD: TODO.ptrace,v 1.20 2017/02/13 15:29:18 kamil Exp $
Items we (currently) plan to finish in the ptrace(2) field:
@@ -12,9 +12,15 @@ Items we (currently) plan to finish in t
- switch PT_WATCHPOINT* to PT_*ETDBREGS and document it, add ATF tests
- add tests for the procfs interface covering all functions available on the
same level as ptrace(2)
- - add support to read debugger events via a file descriptor in procfs
- (kevent(2)), it's still useful in cases when a parent traces tracee and has
- to call waitpid(2) for its child - as this clashes with GUI toolkits
+ - remove 4.4BSD tracing with /proc, restrict /proc to Linux compat, to be
+ superseded with kevent tracing, the original purpose of /proc debugging is
+ long gone (performance issues with PT_WRITE_* and PT_READ_*)
+ - research kevent support for tracing a process over a file descriptor,
+ this means alternative to wait(2)-based events with passing events over the
+ kqueue API - signal handlers are global per application and they clash with
+ GUI toolkits (and perhaps other libraries) - this is long term wishlist in
+ GDB for Linux - the current approach is to fork and debug through GDB remote
+ protocol (this is how it is done in LLDB)
- add support for PT_STEP, PT_GETREGS, PT_SETREGS, PT_GETFPREGS, PT_SETFPREGS
in all ports
- add proper implementation of PTRACE_VFORK for vfork(2)-like events
