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Extract the coverage sanitizer KPI to a new file.

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This will allow multiple consumers of the coverage data to be compiled
into the kernel together. The only requirement is only one can be
registered at a given point in time, however it is expected they will
only register when the coverage data is needed.

A new kernel conflig option COVERAGE is added. This will allow kcov to
become a module that can be loaded as needed, or compiled into the
kernel.

While here clean up the #include style a little.

Reviewed by:	kib
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D18955
This commit is contained in:
Andrew Turner 2019-01-29 11:04:17 +00:00
parent a56136a1ba
commit 524553f56d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=343550
11 changed files with 352 additions and 152 deletions
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5
sys/amd64/conf/GENERIC
View File

@ -100,9 +100,12 @@ options WITNESS # Enable checks to detect deadlocks and cycles
options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed
options MALLOC_DEBUG_MAXZONES=8 # Separate malloc(9) zones
options VERBOSE_SYSINIT=0 # Support debug.verbose_sysinit, off by default
# Kernel Sanitizers
#options COVERAGE # Generic kernel coverage. Used by KCOV
#options KCOV # Kernel Coverage Sanitizer
# Warning: KUBSAN can result in a kernel too large for loader to load
#options KUBSAN # Kernel Undefined Behavior Sanitizer
#options KCOV # Kernel Coverage Sanitizer
# Kernel dump features.
options EKCD # Support for encrypted kernel dumps

3
sys/amd64/conf/GENERIC-NODEBUG
View File

@ -37,4 +37,5 @@ nooptions WITNESS_SKIPSPIN
nooptions BUF_TRACKING
nooptions DEADLKRES
nooptions FULL_BUF_TRACKING
nooptions COVERAGE
nooptions KCOV

5
sys/arm64/conf/GENERIC
View File

@ -92,9 +92,12 @@ options MALLOC_DEBUG_MAXZONES=8 # Separate malloc(9) zones
options ALT_BREAK_TO_DEBUGGER # Enter debugger on keyboard escape sequence
options USB_DEBUG # enable debug msgs
options VERBOSE_SYSINIT=0 # Support debug.verbose_sysinit, off by default
# Kernel Sanitizers
#options COVERAGE # Generic kernel coverage. Used by KCOV
#options KCOV # Kernel Coverage Sanitizer
# Warning: KUBSAN can result in a kernel too large for loader to load
#options KUBSAN # Kernel Undefined Behavior Sanitizer
#options KCOV # Kernel Coverage Sanitizer
# Kernel dump features.
options EKCD # Support for encrypted kernel dumps

2
sys/arm64/conf/GENERIC-NODEBUG
View File

@ -36,3 +36,5 @@ nooptions WITNESS
nooptions WITNESS_SKIPSPIN
nooptions DEADLKRES
nooptions USB_DEBUG
nooptions COVERAGE
nooptions KCOV

2
sys/conf/files
View File

@ -3883,6 +3883,8 @@ kern/subr_capability.c standard
kern/subr_clock.c standard
kern/subr_compressor.c standard \
compile-with "${NORMAL_C} -I$S/contrib/zstd/lib/freebsd"
kern/subr_coverage.c optional coverage \
compile-with "${NORMAL_C} -fno-sanitize=all"
kern/subr_counter.c standard
kern/subr_devstat.c standard
kern/subr_disk.c standard

4
sys/conf/kern.pre.mk
View File

@ -118,8 +118,8 @@ KUBSAN_ENABLED!= grep KUBSAN opt_global.h || true ; echo
SAN_CFLAGS+= -fsanitize=undefined
.endif
KCOV_ENABLED!= grep KCOV opt_kcov.h || true ; echo
.if !empty(KCOV_ENABLED)
COVERAGE_ENABLED!= grep COVERAGE opt_global.h || true ; echo
.if !empty(COVERAGE_ENABLED)
SAN_CFLAGS+= -fsanitize-coverage=trace-pc,trace-cmp
.endif

3
sys/conf/options
View File

@ -57,7 +57,6 @@ DDB_CTF opt_ddb.h
DDB_NUMSYM opt_ddb.h
FULL_BUF_TRACKING opt_global.h
GDB
KCOV opt_kcov.h
KDB opt_global.h
KDB_TRACE opt_kdb.h
KDB_UNATTENDED opt_kdb.h
@ -234,6 +233,8 @@ VERBOSE_SYSINIT
ZSTDIO opt_zstdio.h
# Sanitizers
COVERAGE opt_global.h
KCOV
KUBSAN opt_global.h
# POSIX kernel options

174
sys/kern/kern_kcov.c
View File

@ -39,29 +39,26 @@
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/kcov.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/rwlock.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <vm/pmap.h>
MALLOC_DEFINE(M_KCOV_INFO, "kcovinfo", "KCOV info type");
#define KCOV_ELEMENT_SIZE sizeof(uint64_t)
@ -138,17 +135,6 @@ static d_close_t kcov_close;
static d_mmap_single_t kcov_mmap_single;
static d_ioctl_t kcov_ioctl;
void __sanitizer_cov_trace_pc(void);
void __sanitizer_cov_trace_cmp1(uint8_t, uint8_t);
void __sanitizer_cov_trace_cmp2(uint16_t, uint16_t);
void __sanitizer_cov_trace_cmp4(uint32_t, uint32_t);
void __sanitizer_cov_trace_cmp8(uint64_t, uint64_t);
void __sanitizer_cov_trace_const_cmp1(uint8_t, uint8_t);
void __sanitizer_cov_trace_const_cmp2(uint16_t, uint16_t);
void __sanitizer_cov_trace_const_cmp4(uint32_t, uint32_t);
void __sanitizer_cov_trace_const_cmp8(uint64_t, uint64_t);
void __sanitizer_cov_trace_switch(uint64_t, uint64_t *);
static int kcov_alloc(struct kcov_info *info, size_t entries);
static void kcov_init(const void *unused);
@ -169,6 +155,7 @@ SYSCTL_UINT(_kern_kcov, OID_AUTO, max_entries, CTLFLAG_RW,
"Maximum number of entries in the kcov buffer");
static struct mtx kcov_lock;
static int active_count;
static struct kcov_info *
get_kinfo(struct thread *td)
@ -197,25 +184,13 @@ get_kinfo(struct thread *td)
return (info);
}
/*
* Main entry point. A call to this function will be inserted
* at every edge, and if coverage is enabled for the thread
* this function will add the PC to the buffer.
*/
void
__sanitizer_cov_trace_pc(void)
static void
trace_pc(uintptr_t ret)
{
struct thread *td;
struct kcov_info *info;
uint64_t *buf, index;
/*
* To guarantee curthread is properly set, we exit early
* until the driver has been initialized
*/
if (cold)
return;
td = curthread;
info = get_kinfo(td);
if (info == NULL)
@ -237,7 +212,7 @@ __sanitizer_cov_trace_pc(void)
if (index + 2 > info->entries)
return;
buf[index + 1] = (uint64_t)__builtin_return_address(0);
buf[index + 1] = ret;
buf[0] = index + 1;
}
@ -248,13 +223,6 @@ trace_cmp(uint64_t type, uint64_t arg1, uint64_t arg2, uint64_t ret)
struct kcov_info *info;
uint64_t *buf, index;
/*
* To guarantee curthread is properly set, we exit early
* until the driver has been initialized
*/
if (cold)
return (false);
td = curthread;
info = get_kinfo(td);
if (info == NULL)
@ -287,108 +255,6 @@ trace_cmp(uint64_t type, uint64_t arg1, uint64_t arg2, uint64_t ret)
return (true);
}
void
__sanitizer_cov_trace_cmp1(uint8_t arg1, uint8_t arg2)
{
trace_cmp(KCOV_CMP_SIZE(0), arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_cmp2(uint16_t arg1, uint16_t arg2)
{
trace_cmp(KCOV_CMP_SIZE(1), arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_cmp4(uint32_t arg1, uint32_t arg2)
{
trace_cmp(KCOV_CMP_SIZE(2), arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_cmp8(uint64_t arg1, uint64_t arg2)
{
trace_cmp(KCOV_CMP_SIZE(3), arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_const_cmp1(uint8_t arg1, uint8_t arg2)
{
trace_cmp(KCOV_CMP_SIZE(0) | KCOV_CMP_CONST, arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_const_cmp2(uint16_t arg1, uint16_t arg2)
{
trace_cmp(KCOV_CMP_SIZE(1) | KCOV_CMP_CONST, arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_const_cmp4(uint32_t arg1, uint32_t arg2)
{
trace_cmp(KCOV_CMP_SIZE(2) | KCOV_CMP_CONST, arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_const_cmp8(uint64_t arg1, uint64_t arg2)
{
trace_cmp(KCOV_CMP_SIZE(3) | KCOV_CMP_CONST, arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
/*
* val is the switch operand
* cases[0] is the number of case constants
* cases[1] is the size of val in bits
* cases[2..n] are the case constants
*/
void
__sanitizer_cov_trace_switch(uint64_t val, uint64_t *cases)
{
uint64_t i, count, ret, type;
count = cases[0];
ret = (uint64_t)__builtin_return_address(0);
switch (cases[1]) {
case 8:
type = KCOV_CMP_SIZE(0);
break;
case 16:
type = KCOV_CMP_SIZE(1);
break;
case 32:
type = KCOV_CMP_SIZE(2);
break;
case 64:
type = KCOV_CMP_SIZE(3);
break;
default:
return;
}
val |= KCOV_CMP_CONST;
for (i = 0; i < count; i++)
if (!trace_cmp(type, val, cases[i + 2], ret))
return;
}
/*
* The fd is being closed, cleanup everything we can.
*/
@ -456,6 +322,7 @@ kcov_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
struct kcov_info *info;
int error;
if ((error = devfs_get_cdevpriv((void **)&info)) != 0)
return (error);
@ -571,6 +438,16 @@ kcov_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag __unused,
error = EINVAL;
break;
}
/* Lets hope nobody opens this 2 billion times */
KASSERT(active_count < INT_MAX,
("%s: Open too many times", __func__));
active_count++;
if (active_count == 1) {
cov_register_pc(&trace_pc);
cov_register_cmp(&trace_cmp);
}
KASSERT(info->thread == NULL,
("Enabling kcov when already enabled"));
info->thread = td;
@ -589,6 +466,13 @@ kcov_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag __unused,
error = EINVAL;
break;
}
KASSERT(active_count > 0, ("%s: Open count is zero", __func__));
active_count--;
if (active_count == 0) {
cov_register_pc(&trace_pc);
cov_register_cmp(&trace_cmp);
}
td->td_kcov_info = NULL;
atomic_store_int(&info->state, KCOV_STATE_READY);
/*
@ -618,6 +502,12 @@ kcov_thread_dtor(void *arg __unused, struct thread *td)
return;
mtx_lock_spin(&kcov_lock);
KASSERT(active_count > 0, ("%s: Open count is zero", __func__));
active_count--;
if (active_count == 0) {
cov_register_pc(&trace_pc);
cov_register_cmp(&trace_cmp);
}
td->td_kcov_info = NULL;
if (info->state != KCOV_STATE_DYING) {
/*
@ -673,4 +563,4 @@ kcov_init(const void *unused)
EVENTHANDLER_PRI_ANY);
}
SYSINIT(kcovdev, SI_SUB_DEVFS, SI_ORDER_ANY, kcov_init, NULL);
SYSINIT(kcovdev, SI_SUB_LAST, SI_ORDER_ANY, kcov_init, NULL);

237
sys/kern/subr_coverage.c Normal file
View File

@ -0,0 +1,237 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2018 The FreeBSD Foundation. All rights reserved.
* Copyright (C) 2018, 2019 Andrew Turner
*
* This software was developed by Mitchell Horne under sponsorship of
* the FreeBSD Foundation.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/coverage.h>
#include <machine/atomic.h>
void __sanitizer_cov_trace_pc(void);
void __sanitizer_cov_trace_cmp1(uint8_t, uint8_t);
void __sanitizer_cov_trace_cmp2(uint16_t, uint16_t);
void __sanitizer_cov_trace_cmp4(uint32_t, uint32_t);
void __sanitizer_cov_trace_cmp8(uint64_t, uint64_t);
void __sanitizer_cov_trace_const_cmp1(uint8_t, uint8_t);
void __sanitizer_cov_trace_const_cmp2(uint16_t, uint16_t);
void __sanitizer_cov_trace_const_cmp4(uint32_t, uint32_t);
void __sanitizer_cov_trace_const_cmp8(uint64_t, uint64_t);
void __sanitizer_cov_trace_switch(uint64_t, uint64_t *);
static cov_trace_pc_t cov_trace_pc;
static cov_trace_cmp_t cov_trace_cmp;
void
cov_register_pc(cov_trace_pc_t trace_pc)
{
atomic_store_ptr(&cov_trace_pc, trace_pc);
}
void
cov_unregister_pc(void)
{
atomic_store_ptr(&cov_trace_pc, NULL);
}
void
cov_register_cmp(cov_trace_cmp_t trace_cmp)
{
atomic_store_ptr(&cov_trace_cmp, trace_cmp);
}
void
cov_unregister_cmp(void)
{
atomic_store_ptr(&cov_trace_cmp, NULL);
}
/*
* Main entry point. A call to this function will be inserted
* at every edge, and if coverage is enabled for the thread
* this function will add the PC to the buffer.
*/
void
__sanitizer_cov_trace_pc(void)
{
cov_trace_pc_t trace_pc;
trace_pc = (cov_trace_pc_t)atomic_load_ptr(&cov_trace_pc);
if (trace_pc != NULL)
trace_pc((uint64_t)__builtin_return_address(0));
}
/*
* Comparison entry points. When the kernel performs a comparison
* operation the compiler inserts a call to one of the following
* functions to record the operation.
*/
void
__sanitizer_cov_trace_cmp1(uint8_t arg1, uint8_t arg2)
{
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp != NULL)
trace_cmp(COV_CMP_SIZE(0), arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_cmp2(uint16_t arg1, uint16_t arg2)
{
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp != NULL)
trace_cmp(COV_CMP_SIZE(1), arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_cmp4(uint32_t arg1, uint32_t arg2)
{
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp != NULL)
trace_cmp(COV_CMP_SIZE(2), arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_cmp8(uint64_t arg1, uint64_t arg2)
{
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp != NULL)
trace_cmp(COV_CMP_SIZE(3), arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_const_cmp1(uint8_t arg1, uint8_t arg2)
{
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp != NULL)
trace_cmp(COV_CMP_SIZE(0) | COV_CMP_CONST, arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_const_cmp2(uint16_t arg1, uint16_t arg2)
{
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp != NULL)
trace_cmp(COV_CMP_SIZE(1) | COV_CMP_CONST, arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_const_cmp4(uint32_t arg1, uint32_t arg2)
{
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp != NULL)
trace_cmp(COV_CMP_SIZE(2) | COV_CMP_CONST, arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
void
__sanitizer_cov_trace_const_cmp8(uint64_t arg1, uint64_t arg2)
{
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp != NULL)
trace_cmp(COV_CMP_SIZE(3) | COV_CMP_CONST, arg1, arg2,
(uint64_t)__builtin_return_address(0));
}
/*
* val is the switch operand
* cases[0] is the number of case constants
* cases[1] is the size of val in bits
* cases[2..n] are the case constants
*/
void
__sanitizer_cov_trace_switch(uint64_t val, uint64_t *cases)
{
uint64_t i, count, ret, type;
cov_trace_cmp_t trace_cmp;
trace_cmp = (cov_trace_cmp_t)atomic_load_ptr(&cov_trace_cmp);
if (trace_cmp == NULL)
return;
count = cases[0];
ret = (uint64_t)__builtin_return_address(0);
switch (cases[1]) {
case 8:
type = COV_CMP_SIZE(0);
break;
case 16:
type = COV_CMP_SIZE(1);
break;
case 32:
type = COV_CMP_SIZE(2);
break;
case 64:
type = COV_CMP_SIZE(3);
break;
default:
return;
}
val |= COV_CMP_CONST;
for (i = 0; i < count; i++)
if (!trace_cmp(type, val, cases[i + 2], ret))
return;
}

60
sys/sys/coverage.h Normal file
View File

@ -0,0 +1,60 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2018 The FreeBSD Foundation. All rights reserved.
* Copyright (C) 2018, 2019 Andrew Turner.
*
* This software was developed by Mitchell Horne under sponsorship of
* the FreeBSD Foundation.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SYS_COVERAGE_H_
#define _SYS_COVERAGE_H_
#if !defined(_KERNEL) && !defined(_SYS_KCOV_H_)
#error Do not include this file directly in userspace, use sys/kcov.h
#endif
#define COV_CMP_CONST (1 << 0)
#define COV_CMP_SIZE(x) ((x) << 1)
#define COV_CMP_MASK (3 << 1)
#define COV_CMP_GET_SIZE(x) (((x) >> 1) & 3)
#ifdef _KERNEL
typedef void (*cov_trace_pc_t)(uintptr_t);
typedef bool (*cov_trace_cmp_t)(uint64_t, uint64_t, uint64_t, uint64_t);
void cov_register_cmp(cov_trace_cmp_t);
void cov_unregister_cmp(void);
void cov_register_pc(cov_trace_pc_t);
void cov_unregister_pc(void);
#endif
#endif /* _SYS_COVERAGE_H_ */

9
sys/sys/kcov.h
View File

@ -38,6 +38,7 @@
#ifndef _SYS_KCOV_H_
#define _SYS_KCOV_H_
#include <sys/coverage.h>
#include <sys/ioccom.h>
#define KCOV_MAXENTRIES (1 << 24) /* 16M */
@ -51,9 +52,9 @@
#define KIODISABLE _IO('c', 3) /* Disable coverage recording */
#define KIOSETBUFSIZE _IOWINT('c', 4) /* Set the buffer size */
#define KCOV_CMP_CONST (1 << 0)
#define KCOV_CMP_SIZE(x) ((x) << 1)
#define KCOV_CMP_MASK (3 << 1)
#define KCOV_CMP_GET_SIZE(x) (((x) >> 1) & 3)
#define KCOV_CMP_CONST COV_CMP_CONST
#define KCOV_CMP_SIZE(x) COV_CMP_SIZE(x)
#define KCOV_CMP_MASK COV_CMP_MASK
#define KCOV_CMP_GET_SIZE(x) COV_CMP_GET_SIZE(x)
#endif /* _SYS_KCOV_H_ */