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execve: Clear sigaltstack and fp_regs

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Fujitsu: POSTK_DEBUG_TEMP_FIX_19
Refs: #976
Change-Id: I16895eab13eecbb47b7e6da961fae82ee5e570ee
This commit is contained in:
Ken Sato
2018-07-17 15:37:57 +09:00
parent d898f18293
commit c716e87c53
14 changed files with 498 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm64/kernel/cpu.c
View File

@ -1437,8 +1437,7 @@ void copy_fp_regs(struct thread *from, struct thread *to)
}
}
void
clear_fp_regs(struct thread *thread)
void clear_fp_regs(void)
{
if (likely(elf_hwcap & (HWCAP_FP | HWCAP_ASIMD))) {
#ifdef CONFIG_ARM64_SVE
@ -1475,7 +1474,7 @@ restore_fp_regs(struct thread *thread)
if (likely(elf_hwcap & (HWCAP_FP | HWCAP_ASIMD))) {
if (!thread->fp_regs) {
// only clear fpregs.
clear_fp_regs(thread);
clear_fp_regs();
return;
}
thread_fpsimd_load(thread);

6
arch/arm64/kernel/fpsimd.c
View File

@ -10,6 +10,7 @@
#include <cpufeature.h>
#include <kmalloc.h>
#include <debug.h>
#include <process.h>
//#define DEBUG_PRINT_FPSIMD
@ -71,9 +72,6 @@ static int get_nr_threads(struct process *proc)
return nr_threads;
}
extern void save_fp_regs(struct thread *thread);
extern void clear_fp_regs(struct thread *thread);
extern void restore_fp_regs(struct thread *thread);
/* @ref.impl arch/arm64/kernel/fpsimd.c::sve_set_vector_length */
int sve_set_vector_length(struct thread *thread,
unsigned long vl, unsigned long flags)
@ -127,7 +125,7 @@ int sve_set_vector_length(struct thread *thread,
/* for self at prctl syscall */
if (thread == cpu_local_var(current)) {
save_fp_regs(thread);
clear_fp_regs(thread);
clear_fp_regs();
thread_sve_to_fpsimd(thread, &fp_regs);
sve_free(thread);

20
arch/x86_64/kernel/cpu.c
View File

@ -1760,14 +1760,6 @@ void copy_fp_regs(struct thread *from, struct thread *to)
}
}
#ifdef POSTK_DEBUG_TEMP_FIX_19
void
clear_fp_regs(struct thread *thread)
{
return;
}
#endif /* POSTK_DEBUG_TEMP_FIX_19 */
/*@
@ requires \valid(thread);
@ assigns thread->fp_regs;
@ -1775,8 +1767,11 @@ clear_fp_regs(struct thread *thread)
void
restore_fp_regs(struct thread *thread)
{
if (!thread->fp_regs)
if (!thread->fp_regs) {
// only clear fpregs.
clear_fp_regs();
return;
}
if (xsave_available) {
unsigned int low, high;
@ -1795,6 +1790,13 @@ restore_fp_regs(struct thread *thread)
//release_fp_regs(thread);
}
void clear_fp_regs(void)
{
struct cpu_local_var *v = get_this_cpu_local_var();
restore_fp_regs(&v->idle);
}
ihk_mc_user_context_t *lookup_user_context(struct thread *thread)
{
ihk_mc_user_context_t *uctx = thread->uctx;

6
kernel/include/process.h
View File

@ -829,4 +829,10 @@ void proc_init(void);
void set_timer(void);
struct sig_pending *hassigpending(struct thread *thread);
void release_fp_regs(struct thread *proc);
void save_fp_regs(struct thread *proc);
void copy_fp_regs(struct thread *from, struct thread *to);
void restore_fp_regs(struct thread *proc);
void clear_fp_regs(void);
#endif

7
kernel/process.c
View File

@ -77,10 +77,6 @@ static int vm_range_insert(struct process_vm *vm,
static struct vm_range *vm_range_find(struct process_vm *vm,
unsigned long addr);
static int copy_user_ranges(struct process_vm *vm, struct process_vm *orgvm);
extern void release_fp_regs(struct thread *proc);
extern void save_fp_regs(struct thread *proc);
extern void copy_fp_regs(struct thread *from, struct thread *to);
extern void restore_fp_regs(struct thread *proc);
extern void __runq_add_proc(struct thread *proc, int cpu_id);
extern void terminate_host(int pid);
extern void lapic_timer_enable(unsigned int clocks);
@ -2947,6 +2943,9 @@ void sched_init(void)
INIT_LIST_HEAD(&cpu_local_var(migq));
ihk_mc_spinlock_init(&cpu_local_var(migq_lock));
// to save default fpregs
save_fp_regs(idle_thread);
#ifdef TIMER_CPU_ID
if (ihk_mc_get_processor_id() == TIMER_CPU_ID) {
init_timers();

15
kernel/syscall.c
View File

@ -2129,10 +2129,6 @@ static void munmap_all(void)
return;
} /* munmap_all() */
#ifdef POSTK_DEBUG_TEMP_FIX_19
extern void clear_fp_regs(struct thread *thread);
#endif /* POSTK_DEBUG_TEMP_FIX_19 */
SYSCALL_DECLARE(execve)
{
int error;
@ -2273,10 +2269,13 @@ SYSCALL_DECLARE(execve)
thread->sigcommon->action[i].sa.sa_handler = SIG_DFL;
}
#ifdef POSTK_DEBUG_TEMP_FIX_19
/* The floating-point environment is reset to the default. */
clear_fp_regs(thread);
#endif /* POSTK_DEBUG_TEMP_FIX_19 */
/* Reset floating-point environment to default. */
clear_fp_regs();
/* Reset sigaltstack to default */
thread->sigstack.ss_sp = NULL;
thread->sigstack.ss_flags = SS_DISABLE;
thread->sigstack.ss_size = 0;
error = ptrace_report_exec(thread);
if(error) {

100
test/issues/976/C976.sh Normal file
View File

@ -0,0 +1,100 @@
#!/bin/sh
if [ -f $HOME/mck_test_config ]; then
. $HOME/mck_test_config
else
BIN=
SBIN=
OSTEST=
LTP=
fi
BOOTPARAM="-c 1-7,9-15,17-23,25-31 -m 10G@0,10G@1 -r 1-7:0+9-15:8+17-23:16+25-31:24"
if [ "x$BINDIR" = x ];then
BINDIR="$BIN"
fi
if [ "x$SBINDIR" = x ];then
SBINDIR="$SBIN"
fi
if [ "x$OSTESTDIR" = x ]; then
OSTESTDIR="$OSTEST"
fi
if [ "x$LTPDIR" = x ]; then
LTPDIR="$LTP"
fi
if [ ! -x $SBINDIR/mcstop+release.sh ]; then
echo mcstop+release: not found >&2
exit 1
fi
echo -n "mcstop+release.sh ... "
sudo $SBINDIR/mcstop+release.sh
echo "done"
if [ ! -x $SBINDIR/mcreboot.sh ]; then
echo mcreboot: not found >&2
exit 1
fi
echo -n "mcreboot.sh $BOOTPARAM ... "
sudo $SBINDIR/mcreboot.sh $BOOTPARAM
echo "done"
if [ ! -x $BINDIR/mcexec ]; then
echo mcexec: not found >&2
exit 1
fi
$BINDIR/mcexec ./CT_001
$BINDIR/mcexec ./CT_002
$BINDIR/mcexec ./CT_003
tid=001
echo "*** LT_$tid start *******************************"
sudo PATH=$LTPDIR/bin:${PATH} $BINDIR/mcexec $LTPDIR/bin/execve01 2>&1 | tee ./LT_${tid}.txt
ok=`grep TPASS LT_${tid}.txt | wc -l`
ng=`grep TFAIL LT_${tid}.txt | wc -l`
if [ $ng = 0 ]; then
echo "*** LT_$tid: PASSED (ok:$ok)"
else
echo "*** LT_$tid: FAILED (ok:$ok, ng:$ng)"
fi
echo ""
tid=002
echo "*** LT_$tid start *******************************"
sudo PATH=$LTPDIR/bin:${PATH} $BINDIR/mcexec $LTPDIR/bin/execve02 2>&1 | tee ./LT_${tid}.txt
ok=`grep TPASS LT_${tid}.txt | wc -l`
ng=`grep TFAIL LT_${tid}.txt | wc -l`
if [ $ng = 0 ]; then
echo "*** LT_$tid: PASSED (ok:$ok)"
else
echo "*** LT_$tid: FAILED (ok:$ok, ng:$ng)"
fi
echo ""
tid=003
echo "*** LT_$tid start *******************************"
sudo PATH=$LTPDIR/bin:${PATH} $BINDIR/mcexec $LTPDIR/bin/execve03 2>&1 | tee ./LT_${tid}.txt
ok=`grep TPASS LT_${tid}.txt | wc -l`
ng=`grep TFAIL LT_${tid}.txt | wc -l`
if [ $ng = 0 ]; then
echo "*** LT_$tid: PASSED (ok:$ok)"
else
echo "*** LT_$tid: FAILED (ok:$ok, ng:$ng)"
fi
echo ""
tid=004
echo "*** LT_$tid start *******************************"
sudo PATH=$LTPDIR/bin:${PATH} $BINDIR/mcexec $LTPDIR/bin/execve05 20 $LTPDIR/bin/execve05 $LTPDIR/bin/execve05 4 2>&1 | tee ./LT_${tid}.txt
ok=`grep TPASS LT_${tid}.txt | wc -l`
ng=`grep TFAIL LT_${tid}.txt | wc -l`
if [ $ng = 0 ]; then
echo "*** LT_$tid: PASSED (ok:$ok)"
else
echo "*** LT_$tid: FAILED (ok:$ok, ng:$ng)"
fi
echo ""

64
test/issues/976/CT_001.c Normal file
View File

@ -0,0 +1,64 @@
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <error.h>
#include <sys/mman.h>
#include "./test_chk.h"
#include <signal.h>
#define TEST_NAME "CT_001"
int main(int argc, char *argv[])
{
int rc = 0;
stack_t cur_stack;
stack_t set_stack;
void *stack_area = NULL;
char *exargv[3] = {argv[0], "stop", NULL};
char *exenvp[1] = {NULL};
printf("*** %s start ********************************\n", TEST_NAME);
rc = sigaltstack(NULL, &cur_stack);
OKNG(rc != 0, "sigaltstack() to get current returned %d"
"\n (expect return is 0)", rc);
OKNG(cur_stack.ss_sp != NULL, "default ss_sp is %p"
"\n (expect ss_sp is NULL)", cur_stack.ss_sp);
stack_area = mmap(0, MINSIGSTKSZ, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
OKNG(stack_area == MAP_FAILED, "alloc altstack area %p"
"\n (expect area is valid vaddr)", stack_area);
set_stack.ss_sp = stack_area;
set_stack.ss_flags = 0;
set_stack.ss_size = MINSIGSTKSZ;
rc = sigaltstack(&set_stack, NULL);
OKNG(rc != 0, "sigaltstack() to set new stack returned %d"
"\n (expect return is 0)", rc);
rc = sigaltstack(NULL, &cur_stack);
OKNG(rc != 0, "sigaltstack() to get current returned %d"
"\n (expect return is 0)", rc);
OKNG(cur_stack.ss_sp != stack_area, "new ss_sp is %p"
"\n (expect ss_sp is %p)", cur_stack.ss_sp, stack_area);
if (argc < 2) {
printf("** Re-run by execve\n");
execve(exargv[0], exargv, exenvp);
}
printf("*** %s PASSED\n\n", TEST_NAME);
return 0;
fn_fail:
printf("*** %s FAILED\n\n", TEST_NAME);
return -1;
}

52
test/issues/976/CT_002.c Normal file
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@ -0,0 +1,52 @@
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "./test_chk.h"
#include <fenv.h>
#define TEST_NAME "CT_002"
int main(int argc, char *argv[])
{
fenv_t fenv;
int rc = 0;
int round = 0;
double dummy = 0;
char *exargv[3] = {argv[0], "stop", NULL};
char *exenvp[1] = {NULL};
printf("*** %s start ********************************\n", TEST_NAME);
rc = fetestexcept(FE_ALL_EXCEPT);
OKNG(rc != 0, "fetestexcept(FE_ALL_EXCEPT) returned %d"
"\n (expect return is 0)", rc);
dummy = (double)0 / 0;
rc = fetestexcept(FE_ALL_EXCEPT);
OKNG(rc != FE_INVALID, "fetestexcept(FE_ALL_EXCEPT) returned %d"
"\n (expect return is FE_INVALID(%d))", rc, FE_INVALID);
rc = feraiseexcept(FE_ALL_EXCEPT);
OKNG(rc != 0, "feraiseexcept(FE_ALL_EXCEPT) returned %d"
"\n (expect return is 0)", rc);
rc = fetestexcept(FE_ALL_EXCEPT);
OKNG(rc != FE_ALL_EXCEPT, "fetestexcept(FE_ALL_EXCEPT) returned %d"
"\n (expect return is FE_ALL_EXCEPT(%d))",
rc, FE_ALL_EXCEPT);
if (argc < 2) {
printf("** Re-run by execve\n");
execve(exargv[0], exargv, exenvp);
}
printf("*** %s PASSED\n\n", TEST_NAME);
return 0;
fn_fail:
printf("*** %s FAILED\n\n", TEST_NAME);
return -1;
}

48
test/issues/976/CT_003.c Normal file
View File

@ -0,0 +1,48 @@
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "./test_chk.h"
#include <fenv.h>
#define TEST_NAME "CT_003"
int main(int argc, char *argv[])
{
fenv_t fenv;
int rc = 0;
int round = 0;
char *exargv[3] = {argv[0], "stop", NULL};
char *exenvp[1] = {NULL};
printf("*** %s start ********************************\n", TEST_NAME);
round = fegetround();
OKNG(round != FE_TONEAREST, "fegetround returned %d"
"\n (expect return is FE_TONEAREST(%d))",
round, FE_TONEAREST);
rc = fesetround(FE_TOWARDZERO);
OKNG(rc != 0, "fesetround(FE_TOWARDZERO) returned %d"
"\n (expect return is 0)", rc);
round = fegetround();
OKNG(round != FE_TOWARDZERO, "fegetround returned %d"
"\n (expect return is FE_TOWARDZERO(%d))",
round, FE_TOWARDZERO);
if (argc < 2) {
printf("** Re-run by execve\n");
execve(exargv[0], exargv, exenvp);
}
printf("*** %s PASSED\n\n", TEST_NAME);
return 0;
fn_fail:
printf("*** %s FAILED\n\n", TEST_NAME);
return -1;
}

23
test/issues/976/Makefile Normal file
View File

@ -0,0 +1,23 @@
CC = gcc
TARGET=CT_001 CT_002 CT_003
CPPFLAGS =
LDFLAGS =
all: $(TARGET)
CT_001: CT_001.c
$(CC) -o $@ $^ $(LDFLAGS)
CT_002: CT_002.c
$(CC) -o $@ $^ $(LDFLAGS) -lm
CT_003: CT_003.c
$(CC) -o $@ $^ $(LDFLAGS) -lm
test: all
@sh ./C976.sh
clean:
rm -f $(TARGET) *.o

54
test/issues/976/README Normal file
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@ -0,0 +1,54 @@
【Issue#976 動作確認】
□ テスト内容
1. Issueで報告された再現プログラムでの確認
CT_001: sigaltstackがexecve時に初期化されていることの確認
1. 自プロセスの代替シグナルスタック(ss_sp)がNULLであることを確認
2. sigaltstack()で新たに代替シグナルスタックを設定
3. execve で自身を再実行し、自プロセスの代替シグナルスタックがNULLであることを確認
CT_002: fenvの浮動小数点例外発生フラグがexecve時に初期化されていることを確認
1. fetestexcept(FE_ALL_EXCEPT)で自プロセスの浮動小数点例外の発生フラグが
すべて0であることを確認
2. 0除算を実行し、浮動小数点例外(FE_INVALID)を発生させる
3. fetestexcept(FE_ALL_EXCEPT)で自プロセスのFE_INVALIDフラグが1に
なっていることを確認
4. feraiseexcept(FE_ALL_EXCEPT)で自プロセスの浮動小数点例外の発生フラグを
すべて1にする
5. execve で自身を再実行し、浮動小数点例外の発生フラグがすべて0であることを確認
CT_003: fenvの浮動小数丸めの設定がexecve時に初期化されていることを確認
1. fegetround() で自プロセスの丸めモードを取得し、FE_TONEARESTであることを確認
2. fesetround(FE_TOWARDZERO) で自プロセスの丸めモードをFE_TOWARDZEROに変更する
3. execve で自身を再実行し、自プロセスの丸めモードがFE_TONEARESTであることを確認
2. 既存のexecve機能に影響がないことをLTPを用いて確認
LT_001: ltp-execve01
子プロセスがexecveを実行し、正常に終了することを確認 (TPASS 1件)
LT_002: ltp-execve02
rootのみに実行権限が付与された実行ファイルを、
一般ユーザがexecveした場合に失敗することを確認 (TPASS 1件)
LT_003: ltp-execve03
下記の不正な引数でexecveを実行した場合、返り値と設定されるerrnoが
正しいことを確認 (TPASS 6件)
LT_004: ltp-execve05
execveの標準的な動作を確認 (TPASS 8件)
□ 実行手順
McKernelのインストール先や、OSTEST, LTPの配置場所は、
$HOME/mck_test_config を参照している
mck_test_config は、McKernelをビルドした際に生成される
mck_test_config.sample ファイルを$HOMEにコピーし、適宜編集する
$ make test
実行できない場合は、C976.shの以下の行を適切に書き換えた後に実行。
BIN= mcexec が存在するパス
SBIN= mcreboot.sh が存在するパス
LTP= LTPが存在するパス
□ 実行結果
result.log 参照。
すべての項目をPASSしていることを確認。

103
test/issues/976/result.log Normal file
View File

@ -0,0 +1,103 @@
*** CT_001 start ********************************
[OK] sigaltstack() to get current returned 0
(expect return is 0)
[OK] default ss_sp is (nil)
(expect ss_sp is NULL)
[OK] alloc altstack area 0x2aaaab014000
(expect area is valid vaddr)
[OK] sigaltstack() to set new stack returned 0
(expect return is 0)
[OK] sigaltstack() to get current returned 0
(expect return is 0)
[OK] new ss_sp is 0x2aaaab014000
(expect ss_sp is 0x2aaaab014000)
** Re-run by execve
*** CT_001 start ********************************
[OK] sigaltstack() to get current returned 0
(expect return is 0)
[OK] default ss_sp is (nil)
(expect ss_sp is NULL)
[OK] alloc altstack area 0x2aaaab014000
(expect area is valid vaddr)
[OK] sigaltstack() to set new stack returned 0
(expect return is 0)
[OK] sigaltstack() to get current returned 0
(expect return is 0)
[OK] new ss_sp is 0x2aaaab014000
(expect ss_sp is 0x2aaaab014000)
*** CT_001 PASSED
*** CT_002 start ********************************
[OK] fetestexcept(FE_ALL_EXCEPT) returned 0
(expect return is 0)
[OK] fetestexcept(FE_ALL_EXCEPT) returned 1
(expect return is FE_INVALID(1))
[OK] feraiseexcept(FE_ALL_EXCEPT) returned 0
(expect return is 0)
[OK] fetestexcept(FE_ALL_EXCEPT) returned 61
(expect return is FE_ALL_EXCEPT(61))
** Re-run by execve
*** CT_002 start ********************************
[OK] fetestexcept(FE_ALL_EXCEPT) returned 0
(expect return is 0)
[OK] fetestexcept(FE_ALL_EXCEPT) returned 1
(expect return is FE_INVALID(1))
[OK] feraiseexcept(FE_ALL_EXCEPT) returned 0
(expect return is 0)
[OK] fetestexcept(FE_ALL_EXCEPT) returned 61
(expect return is FE_ALL_EXCEPT(61))
*** CT_002 PASSED
*** CT_003 start ********************************
[OK] fegetround returned 0
(expect return is FE_TONEAREST(0))
[OK] fesetround(FE_TOWARDZERO) returned 0
(expect return is 0)
[OK] fegetround returned 3072
(expect return is FE_TOWARDZERO(3072))
** Re-run by execve
*** CT_003 start ********************************
[OK] fegetround returned 0
(expect return is FE_TONEAREST(0))
[OK] fesetround(FE_TOWARDZERO) returned 0
(expect return is 0)
[OK] fegetround returned 3072
(expect return is FE_TOWARDZERO(3072))
*** CT_003 PASSED
*** LT_001 start *******************************
execl01_child 1 TPASS : execve01_child executed
execve01 0 TINFO : Child process returned TPASS
*** LT_001: PASSED (ok:2)
*** LT_002 start *******************************
Error: Failed to open execve_child
execve(): error loading ELF for file execve_child
execve02 1 TPASS : execve() failed expectedly: TEST_ERRNO=EACCES(13): Permission denied
execve02 0 TINFO : Child process returned TPASS
*** LT_002: PASSED (ok:2)
*** LT_003 start *******************************
lookup_exec_path: lookup_exec_path(): error stat
Error: /tmp/exeiG2gZP/fake.11925 is not an executable?, errno: 13
execve(): error loading ELF for file /tmp/exeiG2gZP/fake.11925
Error: file /tmp/exeiG2gZP/execve03.11925 is zero length
execve(): error loading ELF for file /tmp/exeiG2gZP/execve03.11925
execve03 1 TPASS : execve failed as expected: TEST_ERRNO=ENAMETOOLONG(36): File name too long
execve03 2 TPASS : execve failed as expected: TEST_ERRNO=ENOENT(2): No such file or directory
execve03 3 TPASS : execve failed as expected: TEST_ERRNO=ENOTDIR(20): Not a directory
execve03 4 TPASS : execve failed as expected: TEST_ERRNO=EFAULT(14): Bad address
execve03 5 TPASS : execve failed as expected: TEST_ERRNO=EACCES(13): Permission denied
execve03 6 TPASS : execve failed as expected: TEST_ERRNO=ENOEXEC(8): Exec format error
*** LT_003: PASSED (ok:6)
*** LT_004 start *******************************
execve05 1 TPASS : Test DONE, pid 11995, -- /home/satoken/ltp/testcases/bin/execve05 0 /home/satoken/ltp/testcases/bin/execve05 /home/satoken/ltp/testcases/bin/execve05
execve05 1 TPASS : Test DONE, pid 12025, -- /home/satoken/ltp/testcases/bin/execve05 0 /home/satoken/ltp/testcases/bin/execve05 /home/satoken/ltp/testcases/bin/execve05
execve05 1 TPASS : Test DONE, pid 12055, -- /home/satoken/ltp/testcases/bin/execve05 0 /home/satoken/ltp/testcases/bin/execve05 /home/satoken/ltp/testcases/bin/execve05
execve05 1 TPASS : Test DONE, pid 12085, -- /home/satoken/ltp/testcases/bin/execve05 0 /home/satoken/ltp/testcases/bin/execve05 /home/satoken/ltp/testcases/bin/execve05
execve05 1 TPASS : Test DONE, pid 12115, -- /home/satoken/ltp/testcases/bin/execve05 0 /home/satoken/ltp/testcases/bin/execve05 /home/satoken/ltp/testcases/bin/execve05
execve05 1 TPASS : Test DONE, pid 12145, -- /home/satoken/ltp/testcases/bin/execve05 0 /home/satoken/ltp/testcases/bin/execve05 /home/satoken/ltp/testcases/bin/execve05
execve05 1 TPASS : Test DONE, pid 12175, -- /home/satoken/ltp/testcases/bin/execve05 0 /home/satoken/ltp/testcases/bin/execve05 /home/satoken/ltp/testcases/bin/execve05
execve05 1 TPASS : Test DONE, pid 12205, -- /home/satoken/ltp/testcases/bin/execve05 0 /home/satoken/ltp/testcases/bin/execve05 /home/satoken/ltp/testcases/bin/execve05
*** LT_004: PASSED (ok:8)

23
test/issues/976/test_chk.h Normal file
View File

@ -0,0 +1,23 @@
#ifndef HEADER_TEST_CHK_H
#define HEADER_TEST_CHK_H
#define CHKANDJUMP(cond, ...) do {\
if (cond) {\
fprintf(stderr, " [NG] ");\
fprintf(stderr, __VA_ARGS__);\
fprintf(stderr, " failed\n");\
goto fn_fail;\
} \
} while (0)
#define OKNG(cond, ...) do {\
if (cond) {\
CHKANDJUMP(cond, __VA_ARGS__);\
} else {\
fprintf(stdout, " [OK] ");\
fprintf(stdout, __VA_ARGS__);\
fprintf(stdout, "\n");\
} \
} while (0)
#endif