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[src/trunk]: src Add new ptrace(2) API: PT_SETSTEP & PT_CLEARSTEP
details: https://anonhg.NetBSD.org/src/rev/0588fcfe865f
branches: trunk
changeset: 822796:0588fcfe865f
user: kamil <kamil%NetBSD.org@localhost>
date: Sat Apr 08 00:25:49 2017 +0000
description:
Add new ptrace(2) API: PT_SETSTEP & PT_CLEARSTEP
These operations allow to mark thread as a single-stepping one.
This allows to i.a.:
- single step and emit a signal (PT_SETSTEP & PT_CONTINUE)
- single step and trace syscall entry and exit (PT_SETSTEP & PT_SYSCALL)
The former is useful for debuggers like GDB or LLDB. The latter can be used
to singlestep a usermode kernel. These examples don't limit use-cases of
this interface.
Define PT_*STEP only for platforms defining PT_STEP.
Add new ATF tests setstep[1234].
These ptrace(2) operations first appeared in FreeBSD.
Sponsored by <The NetBSD Foundation>
diffstat:
sys/arch/amd64/include/ptrace.h | 8 ++-
sys/arch/arc/include/ptrace.h | 6 +-
sys/arch/arm/include/ptrace.h | 12 +++-
sys/arch/hppa/include/ptrace.h | 8 ++-
sys/arch/ia64/include/ptrace.h | 8 ++-
sys/arch/m68k/include/ptrace.h | 8 ++-
sys/arch/mips/include/ptrace.h | 15 ++++-
sys/arch/powerpc/include/ptrace.h | 7 +-
sys/arch/sh3/include/ptrace.h | 11 +++-
sys/arch/vax/include/ptrace.h | 8 ++-
sys/kern/sys_ptrace_common.c | 55 +++++++++++++++++++-
sys/sys/lwp.h | 3 +-
tests/lib/libc/sys/t_ptrace_wait.c | 98 ++++++++++++++++++++++++++++++++++---
13 files changed, 208 insertions(+), 39 deletions(-)
diffs (truncated from 580 to 300 lines):
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/amd64/include/ptrace.h
--- a/sys/arch/amd64/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/amd64/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.10 2017/02/23 03:34:22 kamil Exp $ */
+/* $NetBSD: ptrace.h,v 1.11 2017/04/08 00:25:49 kamil Exp $ */
/*
* Copyright (c) 1993 Christopher G. Demetriou
@@ -43,6 +43,8 @@
#define PT_SETFPREGS (PT_FIRSTMACH + 4)
#define PT_GETDBREGS (PT_FIRSTMACH + 5)
#define PT_SETDBREGS (PT_FIRSTMACH + 6)
+#define PT_SETSTEP (PT_FIRSTMACH + 7)
+#define PT_CLEARSTEP (PT_FIRSTMACH + 8)
#define PT_MACHDEP_STRINGS \
"PT_STEP", \
@@ -51,7 +53,9 @@
"PT_GETFPREGS", \
"PT_SETFPREGS", \
"PT_GETDBREGS", \
- "PT_SETDBREGS",
+ "PT_SETDBREGS", \
+ "PT_SETSTEP", \
+ "PT_CLEARSTEP",
#include <machine/reg.h>
#define PTRACE_REG_PC(r) (r)->regs[_REG_RIP]
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/arc/include/ptrace.h
--- a/sys/arch/arc/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/arc/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,6 +1,6 @@
-/* $NetBSD: ptrace.h,v 1.4 2000/01/23 21:01:58 soda Exp $ */
+/* $NetBSD: ptrace.h,v 1.5 2017/04/08 00:25:49 kamil Exp $ */
/* $OpenBSD: ptrace.h,v 1.1.1.1 1996/06/24 09:07:18 pefo Exp $ */
-#include <mips/ptrace.h>
+#define PT_STEP (PT_FIRSTMACH + 0)
-#define PT_STEP (PT_FIRSTMACH + 0)
+#include <mips/ptrace.h>
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/arm/include/ptrace.h
--- a/sys/arch/arm/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/arm/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.9 2016/11/25 02:19:19 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.10 2017/04/08 00:25:49 kamil Exp $ */
/*
* Copyright (c) 1995 Frank Lancaster
@@ -42,15 +42,21 @@
/* 3 and 4 are for FPE registers */
#define PT_GETFPREGS (PT_FIRSTMACH + 5)
#define PT_SETFPREGS (PT_FIRSTMACH + 6)
+#ifndef _KERNEL
+#define PT_SETSTEP (PT_FIRSTMACH + 7) /* Not implemented */
+#define PT_CLEARSTEP (PT_FIRSTMACH + 8) /* Not implemented */
+#endif
#define PT_MACHDEP_STRINGS \
- "(unused)", \
+ "PT_STEP", \
"PT_GETREGS", \
"PT_SETREGS", \
"old PT_GETFPREGS", \
"old PT_SETFPREGS", \
"PT_GETFPREGS", \
- "PT_SETFPREGS",
+ "PT_SETFPREGS", \
+ "PT_SETSTEP", \
+ "PT_CLEARSTEP",
#include <machine/reg.h>
#define PTRACE_REG_PC(_r) (_r)->r_pc
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/hppa/include/ptrace.h
--- a/sys/arch/hppa/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/hppa/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.6 2016/11/25 02:27:43 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.7 2017/04/08 00:25:49 kamil Exp $ */
/* $OpenBSD: ptrace.h,v 1.2 1998/12/01 03:05:44 mickey Exp $ */
@@ -36,13 +36,17 @@
#define PT_SETREGS (PT_FIRSTMACH + 2)
#define PT_GETFPREGS (PT_FIRSTMACH + 3)
#define PT_SETFPREGS (PT_FIRSTMACH + 4)
+#define PT_SETSTEP (PT_FIRSTMACH + 5)
+#define PT_CLEARSTEP (PT_FIRSTMACH + 6)
#define PT_MACHDEP_STRINGS \
"PT_STEP", \
"PT_GETREGS", \
"PT_SETREGS", \
"PT_GETFPREGS", \
- "PT_SETFPREGS",
+ "PT_SETFPREGS", \
+ "PT_SETSTEP", \
+ "PT_CLEARSTEP",
#include <machine/reg.h>
#define PTRACE_REG_PC(r) (r)->r_pcoqh
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/ia64/include/ptrace.h
--- a/sys/arch/ia64/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/ia64/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.3 2015/09/15 15:49:02 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.4 2017/04/08 00:25:49 kamil Exp $ */
/*
* Copyright (c) 1994 Christopher G. Demetriou
@@ -38,13 +38,17 @@
#define PT_SETREGS (PT_FIRSTMACH + 2)
#define PT_GETFPREGS (PT_FIRSTMACH + 3)
#define PT_SETFPREGS (PT_FIRSTMACH + 4)
+#define PT_SETSTEP (PT_FIRSTMACH + 5)
+#define PT_CLEARSTEP (PT_FIRSTMACH + 6)
#define PT_MACHDEP_STRINGS \
"PT_STEP", \
"PT_GETREGS", \
"PT_SETREGS", \
"PT_GETFPREGS", \
- "PT_SETFPREGS",
+ "PT_SETFPREGS", \
+ "PT_SETSTEP", \
+ "PT_CLEARSTEP",
#include <machine/reg.h>
#define PTRACE_REG_PC(r) (r)->r_special.iip
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/m68k/include/ptrace.h
--- a/sys/arch/m68k/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/m68k/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.10 2015/09/25 16:05:17 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.11 2017/04/08 00:25:49 kamil Exp $ */
/*
* Copyright (c) 1993 Christopher G. Demetriou
@@ -40,13 +40,17 @@
#define PT_SETREGS (PT_FIRSTMACH + 2)
#define PT_GETFPREGS (PT_FIRSTMACH + 3)
#define PT_SETFPREGS (PT_FIRSTMACH + 4)
+#define PT_SETSTEP (PT_FIRSTMACH + 5)
+#define PT_CLEARSTEP (PT_FIRSTMACH + 6)
#define PT_MACHDEP_STRINGS \
"PT_STEP", \
"PT_GETREGS", \
"PT_SETREGS", \
"PT_GETFPREGS", \
- "PT_SETFPREGS",
+ "PT_SETFPREGS", \
+ "PT_SETSTEP", \
+ "PT_CLEARSTEP",
#include <machine/reg.h>
#define PTRACE_REG_PC(r) (r)->r_pc
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/mips/include/ptrace.h
--- a/sys/arch/mips/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/mips/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.14 2015/09/25 16:05:17 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.15 2017/04/08 00:25:49 kamil Exp $ */
/*
* Copyright (c) 1992, 1993
@@ -39,19 +39,26 @@
#ifndef _MIPS_PTRACE_H_
#define _MIPS_PTRACE_H_
-/*#define PT_STEP (PT_FIRSTMACH + 0)*/
+/* MIPS PT_STEP PT_FIRSTMACH+0 might be defined by a port specific header */
#define PT_GETREGS (PT_FIRSTMACH + 1)
#define PT_SETREGS (PT_FIRSTMACH + 2)
#define PT_GETFPREGS (PT_FIRSTMACH + 3)
#define PT_SETFPREGS (PT_FIRSTMACH + 4)
+#ifdef PT_STEP
+#define PT_SETSTEP (PT_FIRSTMACH + 5)
+#define PT_CLEARSTEP (PT_FIRSTMACH + 6)
+#endif
+
#define PT_MACHDEP_STRINGS \
- "(unused)", \
+ "PT_STEP", \
"PT_GETREGS", \
"PT_SETREGS", \
"PT_GETFPREGS", \
- "PT_SETFPREGS",
+ "PT_SETFPREGS", \
+ "PT_SETSTEP", \
+ "PT_CLEARSTEP",
#include <machine/reg.h>
#define PTRACE_REG_PC(r) (r)->r_regs[35]
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/powerpc/include/ptrace.h
--- a/sys/arch/powerpc/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/powerpc/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.12 2015/09/15 15:49:03 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.13 2017/04/08 00:25:49 kamil Exp $ */
#ifndef _POWERPC_PTRACE_H
#define _POWERPC_PTRACE_H
@@ -10,12 +10,15 @@
#define PT_SETFPREGS (PT_FIRSTMACH + 4)
#define PT_GETVECREGS (PT_FIRSTMACH + 5)
#define PT_SETVECREGS (PT_FIRSTMACH + 6)
+#define PT_SETSTEP (PT_FIRSTMACH + 7)
+#define PT_CLEARSTEP (PT_FIRSTMACH + 8)
#define PT_MACHDEP_STRINGS \
"PT_STEP", \
"PT_GETREGS", "PT_SETREGS", \
"PT_GETFPREGS", "PT_SETFPREGS", \
- "PT_GETVECREGS", "PT_SETVECREGS",
+ "PT_GETVECREGS", "PT_SETVECREGS", \
+ "PT_SETSTEP", "PT_CLEARSTEP",
#include <machine/reg.h>
#define PTRACE_REG_PC(r) (r)->pc
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/sh3/include/ptrace.h
--- a/sys/arch/sh3/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/sh3/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.12 2015/09/25 16:05:17 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.13 2017/04/08 00:25:49 kamil Exp $ */
/*
* Copyright (c) 1993 Christopher G. Demetriou
@@ -51,12 +51,19 @@
#define PT_SETFPREGS (PT_FIRSTMACH + 6)
#endif
+#define PT_SETSTEP (PT_FIRSTMACH + 7)
+#define PT_CLEARSTEP (PT_FIRSTMACH + 8)
+
#define PT_MACHDEP_STRINGS \
"PT_STEP", \
"PT___GETREGS40", \
"PT___SETREGS40", \
"PT_GETREGS", \
- "PT_SETREGS",
+ "PT_SETREGS", \
+ "PT_GETFPREGS", \
+ "PT_SETFPREGS", \
+ "PT_SETSTEP", \
+ "PT_CLEARSTEP"
#include <machine/reg.h>
#define PTRACE_REG_PC(r) r->r_spc
diff -r 27a1050ee446 -r 0588fcfe865f sys/arch/vax/include/ptrace.h
--- a/sys/arch/vax/include/ptrace.h Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/arch/vax/include/ptrace.h Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.6 2015/09/25 16:05:18 christos Exp $ */
+/* $NetBSD: ptrace.h,v 1.7 2017/04/08 00:25:49 kamil Exp $ */
/*
* Copyright (c) 1994 Ludd, University of Lule}, Sweden.
@@ -36,11 +36,15 @@
#define PT_STEP (PT_FIRSTMACH + 0)
#define PT_GETREGS (PT_FIRSTMACH + 1)
#define PT_SETREGS (PT_FIRSTMACH + 2)
+#define PT_SETSTEP (PT_FIRSTMACH + 3)
+#define PT_CLEARSTEP (PT_FIRSTMACH + 4)
#define PT_MACHDEP_STRINGS \
"PT_STEP", \
"PT_GETREGS", \
- "PT_SETREGS",
+ "PT_SETREGS", \
+ "PT_SETSTEP", \
+ "PT_CLEARSTEP",
#include <machine/reg.h>
diff -r 27a1050ee446 -r 0588fcfe865f sys/kern/sys_ptrace_common.c
--- a/sys/kern/sys_ptrace_common.c Fri Apr 07 17:07:09 2017 +0000
+++ b/sys/kern/sys_ptrace_common.c Sat Apr 08 00:25:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sys_ptrace_common.c,v 1.20 2017/03/29 22:48:03 kamil Exp $ */
+/* $NetBSD: sys_ptrace_common.c,v 1.21 2017/04/08 00:25:50 kamil Exp $ */
/*-
* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
@@ -118,7 +118,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sys_ptrace_common.c,v 1.20 2017/03/29 22:48:03 kamil Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sys_ptrace_common.c,v 1.21 2017/04/08 00:25:50 kamil Exp $");
#ifdef _KERNEL_OPT
#include "opt_ptrace.h"
@@ -229,6 +229,8 @@
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