Re: [Qemu-devel] [PATCH v4 7/7] qtest: add rtc-test test-case

[Blue Swirl <blauwirbel@gmail.com>]

On Fri, Mar 30, 2012 at 17:15, Blue Swirl <blauwirbel@gmail.com> wrote:
> On Wed, Mar 28, 2012 at 13:42, Paolo Bonzini <pbonzini@redhat.com> wrote:
>> From: Anthony Liguori <aliguori@us.ibm.com>
>>
>> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> ---
>>  tests/Makefile   |    5 +
>>  tests/rtc-test.c |  263 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>  2 files changed, 268 insertions(+), 0 deletions(-)
>>  create mode 100644 tests/rtc-test.c
>>
>> diff --git a/tests/Makefile b/tests/Makefile
>> index 99ca308..42ce2d7 100644
>> --- a/tests/Makefile
>> +++ b/tests/Makefile
>> @@ -16,6 +16,11 @@ check-unit-y += tests/test-coroutine$(EXESUF)
>>
>>  check-block-$(CONFIG_POSIX) += tests/qemu-iotests-quick.sh
>>
>> +# All QTests for now are POSIX-only, but the dependencies are
>> +# really in libqtest, not in the testcases themselves.
>> +check-qtest-i386-y = tests/rtc-test
>> +check-qtest-x86_64-y = $(check-qtest-i386-y)
>
> I get this error when trying 'make check':
> GTESTER tests/test-string-output-visitor
> GTESTER tests/test-coroutine
> ccache gcc -O2 -g   -Wl,--warn-common -m64 -g
> /src/qemu/tests/rtc-test.c tests/libqtest.o osdep.o oslib-posix.o
> qemu-thread-posix.o   -o tests/rtc-test
> /src/qemu/tests/rtc-test.c:14:33: error: hw/mc146818rtc_regs.h: No
> such file or directory
> /src/qemu/tests/rtc-test.c:16:18: error: glib.h: No such file or directory
> /src/qemu/tests/rtc-test.c:46: warning: 'struct tm' declared inside
> parameter list
> /src/qemu/tests/rtc-test.c:46: warning: its scope is only this
> definition or declaration, which is probably not what you want
>
> It looks like the build rules are not correct. This is also an out of
> tree build. Perhaps the patsubst rules in tests/Makefile do not match
> rtc-test because it doesn't start with "qtest-"?

This fixes 'make check'. Trace objects are also needed if tracing is enabled.

diff --git a/tests/Makefile b/tests/Makefile
index 29c1e51..a98a848 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -63,6 +63,8 @@ tests/test-qmp-input-visitor$(EXESUF):
tests/test-qmp-input-visitor.o $(test-qap
 tests/test-qmp-input-strict$(EXESUF): tests/test-qmp-input-strict.o
$(test-qapi-obj-y)
 tests/test-qmp-commands$(EXESUF): tests/test-qmp-commands.o
tests/test-qmp-marshal.o $(test-qapi-obj-y)

+tests/rtc-test$(EXESUF): tests/rtc-test.o $(trace-obj-y)
+
 # QTest rules

 TARGETS=$(patsubst %-softmmu,%, $(filter %-softmmu,$(TARGET_DIRS)))

>> +
>>  GENERATED_HEADERS += tests/test-qapi-types.h tests/test-qapi-visit.h tests/test-qmp-commands.h
>>
>>  test-obj-y = tests/check-qint.o tests/check-qstring.o tests/check-qdict.o \
>> diff --git a/tests/rtc-test.c b/tests/rtc-test.c
>> new file mode 100644
>> index 0000000..22f807c
>> --- /dev/null
>> +++ b/tests/rtc-test.c
>> @@ -0,0 +1,263 @@
>> +/*
>> + * QTest testcase for the MC146818 real-time clock
>> + *
>> + * Copyright IBM, Corp. 2012
>> + *
>> + * Authors:
>> + *  Anthony Liguori   <aliguori@us.ibm.com>
>> + *
>> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
>> + * See the COPYING file in the top-level directory.
>> + *
>> + */
>> +#include "libqtest.h"
>> +#include "hw/mc146818rtc_regs.h"
>> +
>> +#include <glib.h>
>> +#include <stdio.h>
>> +#include <string.h>
>> +#include <stdlib.h>
>> +#include <unistd.h>
>> +
>> +static uint8_t base = 0x70;
>> +
>> +static int bcd2dec(int value)
>> +{
>> +    return (((value >> 4) & 0x0F) * 10) + (value & 0x0F);
>> +}
>> +
>> +static int dec2bcd(int value)
>> +{
>> +    return ((value / 10) << 4) | (value % 10);
>> +}
>> +
>> +static uint8_t cmos_read(uint8_t reg)
>> +{
>> +    outb(base + 0, reg);
>> +    return inb(base + 1);
>> +}
>> +
>> +static void cmos_write(uint8_t reg, uint8_t val)
>> +{
>> +    outb(base + 0, reg);
>> +    outb(base + 1, val);
>> +}
>> +
>> +static int tm_cmp(struct tm *lhs, struct tm *rhs)
>> +{
>> +    time_t a, b;
>> +    struct tm d1, d2;
>> +
>> +    memcpy(&d1, lhs, sizeof(d1));
>> +    memcpy(&d2, rhs, sizeof(d2));
>> +
>> +    a = mktime(&d1);
>> +    b = mktime(&d2);
>> +
>> +    if (a < b) {
>> +        return -1;
>> +    } else if (a > b) {
>> +        return 1;
>> +    }
>> +
>> +    return 0;
>> +}
>> +
>> +#if 0
>> +static void print_tm(struct tm *tm)
>> +{
>> +    printf("%04d-%02d-%02d %02d:%02d:%02d\n",
>> +           tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
>> +           tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_gmtoff);
>> +}
>> +#endif
>> +
>> +static void cmos_get_date_time(struct tm *date)
>> +{
>> +    int base_year = 2000, hour_offset;
>> +    int sec, min, hour, mday, mon, year;
>> +    time_t ts;
>> +    struct tm dummy;
>> +
>> +    sec = cmos_read(RTC_SECONDS);
>> +    min = cmos_read(RTC_MINUTES);
>> +    hour = cmos_read(RTC_HOURS);
>> +    mday = cmos_read(RTC_DAY_OF_MONTH);
>> +    mon = cmos_read(RTC_MONTH);
>> +    year = cmos_read(RTC_YEAR);
>> +
>> +    if ((cmos_read(RTC_REG_B) & REG_B_DM) == 0) {
>> +        sec = bcd2dec(sec);
>> +        min = bcd2dec(min);
>> +        hour = bcd2dec(hour);
>> +        mday = bcd2dec(mday);
>> +        mon = bcd2dec(mon);
>> +        year = bcd2dec(year);
>> +        hour_offset = 80;
>> +    } else {
>> +        hour_offset = 0x80;
>> +    }
>> +
>> +    if ((cmos_read(0x0B) & REG_B_24H) == 0) {
>> +        if (hour >= hour_offset) {
>> +            hour -= hour_offset;
>> +            hour += 12;
>> +        }
>> +    }
>> +
>> +    ts = time(NULL);
>> +    localtime_r(&ts, &dummy);
>> +
>> +    date->tm_isdst = dummy.tm_isdst;
>> +    date->tm_sec = sec;
>> +    date->tm_min = min;
>> +    date->tm_hour = hour;
>> +    date->tm_mday = mday;
>> +    date->tm_mon = mon - 1;
>> +    date->tm_year = base_year + year - 1900;
>> +    date->tm_gmtoff = 0;
>> +
>> +    ts = mktime(date);
>> +}
>> +
>> +static void check_time(int wiggle)
>> +{
>> +    struct tm start, date[4], end;
>> +    struct tm *datep;
>> +    time_t ts;
>> +
>> +    /*
>> +     * This check assumes a few things.  First, we cannot guarantee that we get
>> +     * a consistent reading from the wall clock because we may hit an edge of
>> +     * the clock while reading.  To work around this, we read four clock readings
>> +     * such that at least two of them should match.  We need to assume that one
>> +     * reading is corrupt so we need four readings to ensure that we have at
>> +     * least two consecutive identical readings
>> +     *
>> +     * It's also possible that we'll cross an edge reading the host clock so
>> +     * simply check to make sure that the clock reading is within the period of
>> +     * when we expect it to be.
>> +     */
>> +
>> +    ts = time(NULL);
>> +    gmtime_r(&ts, &start);
>> +
>> +    cmos_get_date_time(&date[0]);
>> +    cmos_get_date_time(&date[1]);
>> +    cmos_get_date_time(&date[2]);
>> +    cmos_get_date_time(&date[3]);
>> +
>> +    ts = time(NULL);
>> +    gmtime_r(&ts, &end);
>> +
>> +    if (tm_cmp(&date[0], &date[1]) == 0) {
>> +        datep = &date[0];
>> +    } else if (tm_cmp(&date[1], &date[2]) == 0) {
>> +        datep = &date[1];
>> +    } else if (tm_cmp(&date[2], &date[3]) == 0) {
>> +        datep = &date[2];
>> +    } else {
>> +        g_assert_not_reached();
>> +    }
>> +
>> +    if (!(tm_cmp(&start, datep) <= 0 && tm_cmp(datep, &end) <= 0)) {
>> +        time_t t, s;
>> +
>> +        start.tm_isdst = datep->tm_isdst;
>> +
>> +        t = mktime(datep);
>> +        s = mktime(&start);
>> +        if (t < s) {
>> +            g_test_message("RTC is %ld second(s) behind wall-clock\n", (s - t));
>> +        } else {
>> +            g_test_message("RTC is %ld second(s) ahead of wall-clock\n", (t - s));
>> +        }
>> +
>> +        g_assert_cmpint(ABS(t - s), <=, wiggle);
>> +    }
>> +}
>> +
>> +static int wiggle = 2;
>> +
>> +static void bcd_check_time(void)
>> +{
>> +    /* Set BCD mode */
>> +    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_DM);
>> +    check_time(wiggle);
>> +}
>> +
>> +static void dec_check_time(void)
>> +{
>> +    /* Set DEC mode */
>> +    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) | REG_B_DM);
>> +    check_time(wiggle);
>> +}
>> +
>> +static void set_alarm_time(struct tm *tm)
>> +{
>> +    int sec;
>> +
>> +    sec = tm->tm_sec;
>> +
>> +    if ((cmos_read(RTC_REG_B) & REG_B_DM) == 0) {
>> +        sec = dec2bcd(sec);
>> +    }
>> +
>> +    cmos_write(RTC_SECONDS_ALARM, sec);
>> +    cmos_write(RTC_MINUTES_ALARM, RTC_ALARM_DONT_CARE);
>> +    cmos_write(RTC_HOURS_ALARM, RTC_ALARM_DONT_CARE);
>> +}
>> +
>> +static void alarm_time(void)
>> +{
>> +    struct tm now;
>> +    time_t ts;
>> +    int i;
>> +
>> +    ts = time(NULL);
>> +    gmtime_r(&ts, &now);
>> +
>> +    /* set DEC mode */
>> +    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) | REG_B_DM);
>> +
>> +    g_assert(!get_irq(RTC_ISA_IRQ));
>> +    cmos_read(RTC_REG_C);
>> +
>> +    now.tm_sec = (now.tm_sec + 2) % 60;
>> +    set_alarm_time(&now);
>> +    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) | REG_B_AIE);
>> +
>> +    for (i = 0; i < 2 + wiggle; i++) {
>> +        if (get_irq(RTC_ISA_IRQ)) {
>> +            break;
>> +        }
>> +
>> +        clock_step(1000000000);
>> +    }
>> +
>> +    g_assert(get_irq(RTC_ISA_IRQ));
>> +    g_assert((cmos_read(RTC_REG_C) & REG_C_AF) != 0);
>> +    g_assert(cmos_read(RTC_REG_C) == 0);
>> +}
>> +
>> +int main(int argc, char **argv)
>> +{
>> +    QTestState *s = NULL;
>> +    int ret;
>> +
>> +    g_test_init(&argc, &argv, NULL);
>> +
>> +    s = qtest_start("-display none -rtc clock=vm");
>> +    qtest_irq_intercept_in(s, "ioapic");
>> +
>> +    qtest_add_func("/rtc/bcd/check-time", bcd_check_time);
>> +    qtest_add_func("/rtc/dec/check-time", dec_check_time);
>> +    qtest_add_func("/rtc/alarm-time", alarm_time);
>> +    ret = g_test_run();
>> +
>> +    if (s) {
>> +        qtest_quit(s);
>> +    }
>> +
>> +    return ret;
>> +}
>> --
>> 1.7.9.1
>>
>>