diff options
Diffstat (limited to 'regressions/ck_ec')
| -rw-r--r-- | regressions/ck_ec/benchmark/Makefile | 18 | ||||
| -rw-r--r-- | regressions/ck_ec/benchmark/ck_ec.c | 484 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/Makefile | 73 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/ck_ec_smoke_test.c | 450 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/fuzz_harness.h | 95 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/prop_test_slow_wakeup.c | 110 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/prop_test_timeutil_add.c | 101 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/prop_test_timeutil_add_ns.c | 88 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/prop_test_timeutil_cmp.c | 99 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/prop_test_timeutil_scale.c | 41 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/prop_test_value.c | 150 | ||||
| -rw-r--r-- | regressions/ck_ec/validate/prop_test_wakeup.c | 193 |
12 files changed, 1902 insertions, 0 deletions
diff --git a/regressions/ck_ec/benchmark/Makefile b/regressions/ck_ec/benchmark/Makefile new file mode 100644 index 0000000..c266023 --- /dev/null +++ b/regressions/ck_ec/benchmark/Makefile @@ -0,0 +1,18 @@ +.PHONY: check clean distribution + +OBJECTS=ck_ec + +all: $(OBJECTS) + +ck_ec: ck_ec.c ../../../include/ck_ec.h + $(CC) $(CFLAGS) ../../../src/ck_ec.c -o ck_ec ck_ec.c + +check: all + ./ck_ec $(CORES) 1 + +clean: + rm -rf *~ *.o $(OBJECTS) *.dSYM *.exe + +include ../../../build/regressions.build +CFLAGS+=-D_GNU_SOURCE + diff --git a/regressions/ck_ec/benchmark/ck_ec.c b/regressions/ck_ec/benchmark/ck_ec.c new file mode 100644 index 0000000..655f9d8 --- /dev/null +++ b/regressions/ck_ec/benchmark/ck_ec.c @@ -0,0 +1,484 @@ +/* + * Copyright 2018 Paul Khuong. + * All rights reserved. + * + * 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. + */ + +#include <assert.h> +#include <ck_cc.h> +#include <ck_ec.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <inttypes.h> + +#include "../../common.h" + +#ifndef STEPS +#define STEPS (65536 * 64) +#endif + +static int gettime(const struct ck_ec_ops *, struct timespec *out); +static void wake32(const struct ck_ec_ops *, const uint32_t *); +static void wait32(const struct ck_ec_wait_state *, + const uint32_t *, uint32_t, const struct timespec *); +static void wake64(const struct ck_ec_ops *, const uint64_t *); +static void wait64(const struct ck_ec_wait_state *, + const uint64_t *, uint64_t, const struct timespec *); + +static const struct ck_ec_ops test_ops = { + .gettime = gettime, + .wait32 = wait32, + .wait64 = wait64, + .wake32 = wake32, + .wake64 = wake64 +}; + +#ifndef __linux__ +static int gettime(const struct ck_ec_ops *ops, struct timespec *out) +{ + (void)out; + + assert(ops == &test_ops); + return -1; +} + +static void wait32(const struct ck_ec_wait_state *state, + const uint32_t *address, uint32_t expected, + const struct timespec *deadline) +{ + (void)address; + (void)expected; + (void)deadline; + + assert(state->ops == &test_ops); + return; +} + +static void wait64(const struct ck_ec_wait_state *state, + const uint64_t *address, uint64_t expected, + const struct timespec *deadline) +{ + (void)address; + (void)expected; + (void)deadline; + + assert(state->ops == &test_ops); + return; +} + +static void wake32(const struct ck_ec_ops *ops, const uint32_t *address) +{ + (void)address; + + assert(ops == &test_ops); + return; +} + +static void wake64(const struct ck_ec_ops *ops, const uint64_t *address) +{ + (void)address; + + assert(ops == &test_ops); + return; +} +#else +#include <linux/futex.h> +#include <sys/syscall.h> +#include <time.h> +#include <unistd.h> + +static int gettime(const struct ck_ec_ops *ops, struct timespec *out) +{ + assert(ops == &test_ops); + return clock_gettime(CLOCK_MONOTONIC, out); +} + +static void wait32(const struct ck_ec_wait_state *state, + const uint32_t *address, uint32_t expected, + const struct timespec *deadline) +{ + assert(state->ops == &test_ops); + syscall(SYS_futex, address, + FUTEX_WAIT_BITSET, expected, deadline, + NULL, FUTEX_BITSET_MATCH_ANY, 0); + return; +} + +static void wait64(const struct ck_ec_wait_state *state, + const uint64_t *address, uint64_t expected, + const struct timespec *deadline) +{ + const void *low_half; + + assert(state->ops == &test_ops); + +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + low_half = address; +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + low_half = (uintptr_t)address + sizeof(uint32_t); +#else +# error "__BYTE_ORDER__ must be defined." +#endif + + syscall(SYS_futex, low_half, + FUTEX_WAIT_BITSET, (uint32_t)expected, deadline, + NULL, FUTEX_BITSET_MATCH_ANY, 0); + return; +} + +static void wake32(const struct ck_ec_ops *ops, const uint32_t *address) +{ + assert(ops == &test_ops); + syscall(SYS_futex, address, + FUTEX_WAKE, INT_MAX, + /* ignored arguments */NULL, NULL, 0); + return; +} + +static void wake64(const struct ck_ec_ops *ops, const uint64_t *address) +{ + const void *low_half; + + assert(ops == &test_ops); + +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + low_half = address; +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + low_half = (uintptr_t)address + sizeof(uint32_t); +#else +# error "__BYTE_ORDER__ must be defined." +#endif + + syscall(SYS_futex, low_half, + FUTEX_WAKE, INT_MAX, + /* ignored arguments */NULL, NULL, 0); + return; +} +#endif /* __linux__ */ + +static const struct ck_ec_mode sp = { + .ops = &test_ops, + .single_producer = true +}; + +static const struct ck_ec_mode mp = { + .ops = &test_ops, + .single_producer = false +}; + +static CK_CC_FORCE_INLINE void bench32(const struct ck_ec_mode mode) +{ + ck_ec32_t ec CK_CC_CACHELINE = CK_EC_INITIALIZER; + uint64_t a; + uint64_t baseline = 1000 * 1000; + uint32_t value; + + for (size_t i = 0; i < STEPS; i++) { + uint64_t s = rdtsc(); + uint64_t elapsed = rdtsc() - s; + + if (elapsed < baseline) { + baseline = elapsed; + } + } + + /* Read value. */ + a = 0; + value = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + uint64_t s = rdtsc(); + + value ^= ck_ec32_value(&ec); + value ^= ck_ec32_value(&ec); + value ^= ck_ec32_value(&ec); + value ^= ck_ec32_value(&ec); + + __asm__ volatile("" :: "r"(value)); + a += rdtsc() - s - baseline; + } + + printf("%s ec32_value: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* Wait (fast path). */ + a = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + uint64_t s = rdtsc(); + + ck_ec32_wait(&ec, &mode, 1, NULL); + ck_ec32_wait(&ec, &mode, 1, NULL); + ck_ec32_wait(&ec, &mode, 1, NULL); + ck_ec32_wait(&ec, &mode, 1, NULL); + + a += rdtsc() - s - baseline; + } + + printf("%s ec32_wait fast: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* trywait. */ + a = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + struct timespec past = { .tv_sec = 0 }; + uint64_t s = rdtsc(); + + ck_ec32_wait(&ec, &mode, 0, &past); + ck_ec32_wait(&ec, &mode, 0, &past); + ck_ec32_wait(&ec, &mode, 0, &past); + ck_ec32_wait(&ec, &mode, 0, &past); + + a += rdtsc() - s - baseline; + } + + printf("%s ec32_wait timeout: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* Inc (no waiter). */ + assert(!ck_ec32_has_waiters(&ec)); + a = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + uint64_t s = rdtsc(); + + ck_ec32_inc(&ec, &mode); + ck_ec32_inc(&ec, &mode); + ck_ec32_inc(&ec, &mode); + ck_ec32_inc(&ec, &mode); + + a += rdtsc() - s - baseline; + } + + printf("%s ec32_inc: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* Inc (with waiter). */ + assert(!ck_ec32_has_waiters(&ec)); + a = 0; + for (size_t i = 0; i < STEPS; i++) { + struct timespec past = { .tv_sec = 1 }; + uint64_t s; + + ck_ec32_wait(&ec, &mode, ck_ec32_value(&ec), &past); + assert(ck_ec32_has_waiters(&ec)); + + s = rdtsc(); + ck_ec32_inc(&ec, &mode); + a += rdtsc() - s - baseline; + } + + printf("%s ec32_inc slow: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* Add (no waiter). */ + assert(!ck_ec32_has_waiters(&ec)); + a = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + uint64_t s = rdtsc(); + + ck_ec32_add(&ec, &mode, i + 1); + ck_ec32_add(&ec, &mode, i + 2); + ck_ec32_add(&ec, &mode, i + 3); + ck_ec32_add(&ec, &mode, i + 4); + + a += rdtsc() - s - baseline; + } + + printf("%s ec32_add: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + assert(!ck_ec32_has_waiters(&ec)); + a = 0; + for (size_t i = 0; i < STEPS; i++) { + struct timespec past = { .tv_sec = 1 }; + uint64_t s; + + ck_ec32_wait(&ec, &mode, ck_ec32_value(&ec), &past); + assert(ck_ec32_has_waiters(&ec)); + + s = rdtsc(); + ck_ec32_add(&ec, &mode, i + 1); + a += rdtsc() - s - baseline; + } + + printf("%s ec32_add slow: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + return; +} + +#ifdef CK_F_EC64 +static CK_CC_FORCE_INLINE void bench64(const struct ck_ec_mode mode) +{ + ck_ec64_t ec CK_CC_CACHELINE = CK_EC_INITIALIZER; + uint64_t a; + uint64_t baseline = 1000 * 1000; + uint64_t value; + + for (size_t i = 0; i < STEPS; i++) { + uint64_t s = rdtsc(); + uint64_t elapsed = rdtsc() - s; + + if (elapsed < baseline) { + baseline = elapsed; + } + } + + /* Read value. */ + a = 0; + value = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + uint64_t s = rdtsc(); + + value ^= ck_ec64_value(&ec); + value ^= ck_ec64_value(&ec); + value ^= ck_ec64_value(&ec); + value ^= ck_ec64_value(&ec); + + __asm__ volatile("" :: "r"(value)); + a += rdtsc() - s - baseline; + } + + printf("%s ec64_value: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* Wait (fast path). */ + a = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + uint64_t s = rdtsc(); + + ck_ec64_wait(&ec, &mode, 1, NULL); + ck_ec64_wait(&ec, &mode, 1, NULL); + ck_ec64_wait(&ec, &mode, 1, NULL); + ck_ec64_wait(&ec, &mode, 1, NULL); + + a += rdtsc() - s - baseline; + } + + printf("%s ec64_wait fast: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* trywait. */ + a = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + struct timespec past = { .tv_sec = 0 }; + uint64_t s = rdtsc(); + + ck_ec64_wait(&ec, &mode, 0, &past); + ck_ec64_wait(&ec, &mode, 0, &past); + ck_ec64_wait(&ec, &mode, 0, &past); + ck_ec64_wait(&ec, &mode, 0, &past); + + a += rdtsc() - s - baseline; + } + + printf("%s ec64_wait timeout: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* Inc (no waiter). */ + assert(!ck_ec64_has_waiters(&ec)); + a = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + uint64_t s = rdtsc(); + + ck_ec64_inc(&ec, &mode); + ck_ec64_inc(&ec, &mode); + ck_ec64_inc(&ec, &mode); + ck_ec64_inc(&ec, &mode); + + a += rdtsc() - s - baseline; + } + + printf("%s ec64_inc: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* Inc (with waiter). */ + assert(!ck_ec64_has_waiters(&ec)); + a = 0; + for (size_t i = 0; i < STEPS; i++) { + struct timespec past = { .tv_sec = 1 }; + uint64_t s; + + ck_ec64_wait(&ec, &mode, ck_ec64_value(&ec), &past); + assert(ck_ec64_has_waiters(&ec)); + + s = rdtsc(); + ck_ec64_inc(&ec, &mode); + a += rdtsc() - s - baseline; + } + + printf("%s ec64_inc slow: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + /* Add (no waiter). */ + assert(!ck_ec64_has_waiters(&ec)); + a = 0; + for (size_t i = 0; i < STEPS / 4; i++) { + uint64_t s = rdtsc(); + + ck_ec64_add(&ec, &mode, i + 1); + ck_ec64_add(&ec, &mode, i + 2); + ck_ec64_add(&ec, &mode, i + 3); + ck_ec64_add(&ec, &mode, i + 4); + + a += rdtsc() - s - baseline; + } + + printf("%s ec64_add: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + + assert(!ck_ec64_has_waiters(&ec)); + a = 0; + for (size_t i = 0; i < STEPS; i++) { + struct timespec past = { .tv_sec = 1 }; + uint64_t s; + + ck_ec64_wait(&ec, &mode, ck_ec64_value(&ec), &past); + assert(ck_ec64_has_waiters(&ec)); + + s = rdtsc(); + ck_ec64_add(&ec, &mode, i + 1); + a += rdtsc() - s - baseline; + } + + printf("%s ec64_add slow: %" PRIu64 "\n", + (mode.single_producer ? "SP" : "MP"), a / STEPS); + return; +} +#endif /* CK_F_EC64 */ + +int +main(void) +{ + printf("SP ec32\n"); + bench32(sp); + printf("\nMP ec32\n"); + bench32(mp); + +#ifdef CK_F_EC64 + printf("\nSP ec64\n"); + bench64(sp); + printf("\nMP ec64\n"); + bench64(mp); +#endif /* CK_F_EC64 */ + + return 0; +} diff --git a/regressions/ck_ec/validate/Makefile b/regressions/ck_ec/validate/Makefile new file mode 100644 index 0000000..f03f493 --- /dev/null +++ b/regressions/ck_ec/validate/Makefile @@ -0,0 +1,73 @@ +.PHONY: check clean distribution + +FUZZER ?= none + +FUZZ_CFLAGS ?= + +# See http://gallium.inria.fr/blog/portable-conditionals-in-makefiles/ for +# the portable conditional technique below. +none_fuzz_cflags = +libfuzzer_fuzz_cflags = -DUSE_LIBFUZZER -fsanitize=fuzzer,memory,undefined + +FUZZ_CFLAGS += ${${FUZZER}_fuzz_cflags} + +OBJECTS = ck_ec_smoke_test \ + prop_test_timeutil_add \ + prop_test_timeutil_add_ns \ + prop_test_timeutil_cmp \ + prop_test_timeutil_scale \ + prop_test_value \ + prop_test_wakeup \ + prop_test_slow_wakeup + +all: $(OBJECTS) + +check: all + ./ck_ec_smoke_test + # the command line arguments are only consumed by libfuzzer. + ./prop_test_slow_wakeup -max_total_time=60 + ./prop_test_timeutil_add -max_total_time=60 + ./prop_test_timeutil_add_ns -max_total_time=60 + ./prop_test_timeutil_cmp -max_total_time=60 + ./prop_test_timeutil_scale -max_total_time=60 + ./prop_test_value -max_total_time=60 + ./prop_test_wakeup -max_total_time=60 + +quickfuzz: all + ./prop_test_slow_wakeup -max_total_time=5 + ./prop_test_timeutil_add -max_total_time=5 + ./prop_test_timeutil_add_ns -max_total_time=5 + ./prop_test_timeutil_cmp -max_total_time=5 + ./prop_test_timeutil_scale -max_total_time=5 + ./prop_test_value -max_total_time=5 + ./prop_test_wakeup -max_total_time=5 + +ck_ec_smoke_test: ../../../src/ck_ec.c ck_ec_smoke_test.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h + $(CC) $(CFLAGS) -std=gnu11 ../../../src/ck_ec.c -o ck_ec_smoke_test ck_ec_smoke_test.c + +prop_test_slow_wakeup: ../../../src/ck_ec.c prop_test_slow_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h + $(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_slow_wakeup prop_test_slow_wakeup.c + +prop_test_timeutil_add: ../../../src/ck_ec.c prop_test_timeutil_add.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h + $(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_timeutil_add prop_test_timeutil_add.c + +prop_test_timeutil_add_ns: ../../../src/ck_ec.c prop_test_timeutil_add_ns.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h + $(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_timeutil_add_ns prop_test_timeutil_add_ns.c + +prop_test_timeutil_cmp: ../../../src/ck_ec.c prop_test_timeutil_cmp.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h + $(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_timeutil_cmp prop_test_timeutil_cmp.c + +prop_test_timeutil_scale: ../../../src/ck_ec.c prop_test_timeutil_scale.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h + $(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_timeutil_scale prop_test_timeutil_scale.c + +prop_test_value: ../../../src/ck_ec.c prop_test_value.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h + $(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_value prop_test_value.c + +prop_test_wakeup: ../../../src/ck_ec.c prop_test_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h + $(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_wakeup prop_test_wakeup.c + +clean: + rm -rf *~ *.o *.dSYM *.exe $(OBJECTS) + +include ../../../build/regressions.build +CFLAGS+=$(PTHREAD_CFLAGS) -D_GNU_SOURCE diff --git a/regressions/ck_ec/validate/ck_ec_smoke_test.c b/regressions/ck_ec/validate/ck_ec_smoke_test.c new file mode 100644 index 0000000..3aca162 --- /dev/null +++ b/regressions/ck_ec/validate/ck_ec_smoke_test.c @@ -0,0 +1,450 @@ +#include <assert.h> +#include <ck_ec.h> +#include <ck_limits.h> +#include <ck_stdbool.h> +#include <pthread.h> +#include <stdio.h> +#include <sys/time.h> +#include <unistd.h> + +#define TIME_MAX ((time_t)((1ULL << ((sizeof(time_t) * CHAR_BIT) - 1)) - 1)) + +#ifndef __linux__ +/* Zero-initialize to mark the ops as unavailable. */ +static const struct ck_ec_ops test_ops; +#else +#include <linux/futex.h> +#include <sys/syscall.h> +#include <time.h> + +static int gettime(const struct ck_ec_ops *, struct timespec *out); +static void wake32(const struct ck_ec_ops *, const uint32_t *); +static void wait32(const struct ck_ec_wait_state *, const uint32_t *, + uint32_t, const struct timespec *); +static void wake64(const struct ck_ec_ops *, const uint64_t *); +static void wait64(const struct ck_ec_wait_state *, const uint64_t *, + uint64_t, const struct timespec *); + +static const struct ck_ec_ops test_ops = { + .gettime = gettime, + .wait32 = wait32, + .wait64 = wait64, + .wake32 = wake32, + .wake64 = wake64 +}; + +static int gettime(const struct ck_ec_ops *ops, struct timespec *out) +{ + assert(ops == &test_ops); + return clock_gettime(CLOCK_MONOTONIC, out); +} + +static void wait32(const struct ck_ec_wait_state *state, + const uint32_t *address, uint32_t expected, + const struct timespec *deadline) +{ + assert(state->ops == &test_ops); + syscall(SYS_futex, address, + FUTEX_WAIT_BITSET, expected, deadline, + NULL, FUTEX_BITSET_MATCH_ANY, 0); + return; +} + +static void wait64(const struct ck_ec_wait_state *state, + const uint64_t *address, uint64_t expected, + const struct timespec *deadline) +{ + const void *low_half; + + assert(state->ops == &test_ops); + +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + low_half = address; +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + low_half = (uintptr_t)address + sizeof(uint32_t); +#else +# error "__BYTE_ORDER__ must be defined." +#endif + + syscall(SYS_futex, low_half, + FUTEX_WAIT_BITSET, (uint32_t)expected, deadline, + NULL, FUTEX_BITSET_MATCH_ANY, 0); + return; +} + +static void wake32(const struct ck_ec_ops *ops, const uint32_t *address) +{ + assert(ops == &test_ops); + syscall(SYS_futex, address, + FUTEX_WAKE, INT_MAX, + /* ignored arguments */NULL, NULL, 0); + return; +} + +static void wake64(const struct ck_ec_ops *ops, const uint64_t *address) +{ + const void *low_half; + + assert(ops == &test_ops); + +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + low_half = address; +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + low_half = (uintptr_t)address + sizeof(uint32_t); +#else +# error "__BYTE_ORDER__ must be defined." +#endif + + syscall(SYS_futex, low_half, + FUTEX_WAKE, INT_MAX, + /* ignored arguments */NULL, NULL, 0); + return; +} +#endif /* __linux__ */ + +static const struct ck_ec_mode sp = { + .ops = &test_ops, + .single_producer = true +}; + +static const struct ck_ec_mode mp = { + .ops = &test_ops, + .single_producer = false +}; + +static void test_update_counter_32(const struct ck_ec_mode *mode) +{ + struct ck_ec32 ec = CK_EC_INITIALIZER; + + assert(ck_ec_value(&ec) == 0); + + ck_ec_inc(&ec, mode); + assert(ck_ec_value(&ec) == 1); + + uint32_t old = ck_ec_add(&ec, mode, 42); + assert(old == 1); + assert(ck_ec_value(&ec) == 43); + return; +} + +#ifdef CK_F_EC64 +static void test_update_counter_64(const struct ck_ec_mode *mode) +{ + struct ck_ec64 ec = CK_EC_INITIALIZER; + + assert(ck_ec_value(&ec) == 0); + + ck_ec_inc(&ec, mode); + assert(ck_ec_value(&ec) == 1); + + uint64_t old = ck_ec_add(&ec, mode, 42); + assert(old == 1); + assert(ck_ec_value(&ec) == 43); + return; +} +#endif + +static void test_deadline(void) +{ + struct timespec deadline; + + assert(ck_ec_deadline(&deadline, &sp, NULL) == 0); + assert(deadline.tv_sec == TIME_MAX); + + { + const struct timespec timeout = { + .tv_sec = 1, + .tv_nsec = 1000 + }; + const struct timespec no_timeout = { + .tv_sec = 0 + }; + struct timespec now; + + assert(ck_ec_deadline(&deadline, &sp, &timeout) == 0); + assert(ck_ec_deadline(&now, &sp, &no_timeout) == 0); + + double now_sec = now.tv_sec + 1e-9 * now.tv_nsec; + double deadline_sec = deadline.tv_sec + 1e-9 * deadline.tv_nsec; + assert(now_sec < deadline_sec); + assert(deadline_sec <= now_sec + 1 + 1000e-9); + } + + { + const struct timespec timeout = { + .tv_sec = TIME_MAX - 1, + .tv_nsec = 1000 + }; + + assert(ck_ec_deadline(&deadline, &sp, &timeout) == 0); + assert(deadline.tv_sec == TIME_MAX); + } + + return; +} + +static void test_wait_32(void) +{ + struct timespec deadline = { .tv_sec = 0 }; + struct ck_ec32 ec; + + ck_ec_init(&ec, 1); + assert(ck_ec_value(&ec) == 1); + assert(ck_ec_wait(&ec, &sp, 2, NULL) == 0); + assert(ck_ec_wait(&ec, &sp, 1, &deadline) == -1); + + { + const struct timespec timeout = { .tv_nsec = 1 }; + + assert(ck_ec_deadline(&deadline, &sp, &timeout) == 0); + assert(ck_ec_wait(&ec, &sp, 1, &deadline) == -1); + assert(ck_ec_has_waiters(&ec)); + } + + return; +} + +#ifdef CK_F_EC64 +static void test_wait_64(void) +{ + struct timespec deadline = { .tv_sec = 0 }; + struct ck_ec64 ec; + + ck_ec_init(&ec, 0); + assert(ck_ec_value(&ec) == 0); + assert(ck_ec_wait(&ec, &sp, 1, NULL) == 0); + assert(ck_ec_wait(&ec, &sp, 0, &deadline) == -1); + + { + const struct timespec timeout = { .tv_nsec = 1 }; + + assert(ck_ec_deadline(&deadline, &sp, &timeout) == 0); + assert(ck_ec_wait(&ec, &sp, 0, &deadline) == -1); + assert(ck_ec_has_waiters(&ec)); + } + + return; +} +#endif + +static int pred(const struct ck_ec_wait_state *state, + struct timespec *deadline) +{ + double initial_ts = state->start.tv_sec + + 1e-9 * state->start.tv_nsec; + int *count = state->data; + + printf("pred wait: %f\n", + deadline->tv_sec + 1e-9 * deadline->tv_nsec - initial_ts); + + if ((*count)++ < 3) { + return 0; + } + + return (*count)++; +} + +/* + * Check that pred's return value is correctly bubbled up, + * and that the event count is marked as having waiters. + */ +static void test_wait_pred_32(void) +{ + struct ck_ec32 ec = CK_EC_INITIALIZER; + int count = 0; + + assert(!ck_ec_has_waiters(&ec)); + assert(ck_ec_wait_pred(&ec, &sp, 0, pred, &count, NULL) == 4); + assert(ck_ec_has_waiters(&ec)); + assert(count == 5); + return; +} + +#ifdef CK_F_EC64 +static int pred2(const struct ck_ec_wait_state *state, + struct timespec *deadline) +{ + double initial_ts = state->start.tv_sec + + 1e-9 * state->start.tv_nsec; + int *count = state->data; + + printf("pred2 wait: %f\n", + deadline->tv_sec + 1e-9 * deadline->tv_nsec - initial_ts); + + *deadline = state->now; + deadline->tv_sec++; + + (*count)++; + return 0; +} + +/* + * wait_pred_64 is nearly identical to _32. Now check that deadline + * overriding works. + */ +static void test_wait_pred_64(void) +{ + const struct timespec timeout = { .tv_sec = 5 }; + struct timespec deadline; + struct ck_ec64 ec = CK_EC_INITIALIZER; + int count = 0; + + assert(!ck_ec_has_waiters(&ec)); + assert(ck_ec_deadline(&deadline, &sp, &timeout) == 0); + assert(ck_ec_wait_pred(&ec, &sp, 0, pred2, &count, &deadline) == -1); + assert(ck_ec_has_waiters(&ec)); + assert(count == 5); + return; +} +#endif + +static int woken = 0; + +static void *test_threaded_32_waiter(void *data) +{ + struct ck_ec32 *ec = data; + + ck_ec_wait(ec, &sp, 0, NULL); + ck_pr_store_int(&woken, 1); + return NULL; +} + +static void test_threaded_inc_32(const struct ck_ec_mode *mode) +{ + struct ck_ec32 ec = CK_EC_INITIALIZER; + pthread_t waiter; + + ck_pr_store_int(&woken, 0); + + pthread_create(&waiter, NULL, test_threaded_32_waiter, &ec); + usleep(10000); + + assert(ck_pr_load_int(&woken) == 0); + ck_ec_inc(&ec, mode); + + pthread_join(waiter, NULL); + assert(ck_pr_load_int(&woken) == 1); + return; +} + +static void test_threaded_add_32(const struct ck_ec_mode *mode) +{ + struct ck_ec32 ec = CK_EC_INITIALIZER; + pthread_t waiter; + + ck_pr_store_int(&woken, 0); + + pthread_create(&waiter, NULL, test_threaded_32_waiter, &ec); + usleep(10000); + + assert(ck_pr_load_int(&woken) == 0); + ck_ec_add(&ec, mode, 4); + + pthread_join(waiter, NULL); + assert(ck_pr_load_int(&woken) == 1); + return; +} + +#ifdef CK_F_EC64 +static void *test_threaded_64_waiter(void *data) +{ + struct ck_ec64 *ec = data; + + ck_ec_wait(ec, &sp, 0, NULL); + ck_pr_store_int(&woken, 1); + return NULL; +} + +static void test_threaded_inc_64(const struct ck_ec_mode *mode) +{ + struct ck_ec64 ec = CK_EC_INITIALIZER; + pthread_t waiter; + + ck_pr_store_int(&woken, 0); + + pthread_create(&waiter, NULL, test_threaded_64_waiter, &ec); + usleep(10000); + + assert(ck_pr_load_int(&woken) == 0); + ck_ec_inc(&ec, mode); + + pthread_join(waiter, NULL); + assert(ck_pr_load_int(&woken) == 1); + return; +} + +static void test_threaded_add_64(const struct ck_ec_mode *mode) +{ + struct ck_ec64 ec = CK_EC_INITIALIZER; + pthread_t waiter; + + ck_pr_store_int(&woken, 0); + + pthread_create(&waiter, NULL, test_threaded_64_waiter, &ec); + usleep(10000); + + assert(ck_pr_load_int(&woken) == 0); + ck_ec_add(&ec, mode, 4); + + pthread_join(waiter, NULL); + assert(ck_pr_load_int(&woken) == 1); + return; +} +#endif + +int main(int argc, char **argv) +{ + (void)argc; + (void)argv; + + if (test_ops.gettime == NULL || + test_ops.wake32 == NULL || + test_ops.wait32 == NULL) { + printf("No ck_ec ops for this platform. Trivial success.\n"); + return 0; + } + + test_update_counter_32(&sp); +#ifdef CK_F_EC64 + test_update_counter_64(&sp); +#endif + printf("test_update_counter SP passed.\n"); + + test_update_counter_32(&mp); +#ifdef CK_F_EC64 + test_update_counter_64(&mp); +#endif + printf("test_update_counter MP passed.\n"); + + test_deadline(); + printf("test_deadline passed.\n"); + + test_wait_32(); +#ifdef CK_F_EC64 + test_wait_64(); +#endif + printf("test_wait passed.\n"); + + test_wait_pred_32(); +#ifdef CK_F_EC64 + test_wait_pred_64(); +#endif + printf("test_wait_pred passed.\n"); + + test_threaded_inc_32(&sp); + test_threaded_add_32(&sp); +#ifdef CK_F_EC64 + test_threaded_inc_64(&sp); + test_threaded_add_64(&sp); +#endif + printf("test_threaded SP passed.\n"); + + test_threaded_inc_32(&mp); + test_threaded_add_32(&mp); +#ifdef CK_F_EC64 + test_threaded_inc_64(&mp); + test_threaded_add_64(&mp); +#endif + printf("test_threaded MP passed.\n"); + return 0; +} diff --git a/regressions/ck_ec/validate/fuzz_harness.h b/regressions/ck_ec/validate/fuzz_harness.h new file mode 100644 index 0000000..8ba6ebe --- /dev/null +++ b/regressions/ck_ec/validate/fuzz_harness.h @@ -0,0 +1,95 @@ +#ifndef FUZZ_HARNESS_H +#define FUZZ_HARNESS_H +#include <assert.h> +#include <ck_stddef.h> +#include <ck_string.h> +#include <stdio.h> +#include <unistd.h> + +#if defined(USE_LIBFUZZER) +#define TEST(function, examples) \ + void LLVMFuzzerInitialize(int *argcp, char ***argvp); \ + int LLVMFuzzerTestOneInput(const void *data, size_t n); \ + \ + void LLVMFuzzerInitialize(int *argcp, char ***argvp) \ + { \ + static char size[128]; \ + static char *argv[1024]; \ + int argc = *argcp; \ + \ + assert(argc < 1023); \ + \ + int r = snprintf(size, sizeof(size), \ + "-max_len=%zu", sizeof(examples[0])); \ + assert((size_t)r < sizeof(size)); \ + \ + memcpy(argv, *argvp, argc * sizeof(argv[0])); \ + argv[argc++] = size; \ + \ + *argcp = argc; \ + *argvp = argv; \ + \ + for (size_t i = 0; \ + i < sizeof(examples) / sizeof(examples[0]); \ + i++) { \ + assert(function(&examples[i]) == 0); \ + } \ + \ + return; \ + } \ + \ + int LLVMFuzzerTestOneInput(const void *data, size_t n) \ + { \ + char buf[sizeof(examples[0])]; \ + \ + memset(buf, 0, sizeof(buf)); \ + if (n < sizeof(buf)) { \ + memcpy(buf, data, n); \ + } else { \ + memcpy(buf, data, sizeof(buf)); \ + } \ + \ + assert(function((const void *)buf) == 0); \ + return 0; \ + } +#elif defined(USE_AFL) +#define TEST(function, examples) \ + int main(int argc, char **argv) \ + { \ + char buf[sizeof(examples[0])]; \ + \ + (void)argc; \ + (void)argv; \ + for (size_t i = 0; \ + i < sizeof(examples) / sizeof(examples[0]); \ + i++) { \ + assert(function(&examples[i]) == 0); \ + } \ + \ + \ + while (__AFL_LOOP(10000)) { \ + memset(buf, 0, sizeof(buf)); \ + read(0, buf, sizeof(buf)); \ + \ + assert(function((const void *)buf) == 0); \ + } \ + \ + return 0; \ + } +#else +#define TEST(function, examples) \ + int main(int argc, char **argv) \ + { \ + (void)argc; \ + (void)argv; \ + \ + for (size_t i = 0; \ + i < sizeof(examples) / sizeof(examples[0]); \ + i++) { \ + assert(function(&examples[i]) == 0); \ + } \ + \ + return 0; \ + } +#endif +#endif /* !FUZZ_HARNESS_H */ diff --git a/regressions/ck_ec/validate/prop_test_slow_wakeup.c b/regressions/ck_ec/validate/prop_test_slow_wakeup.c new file mode 100644 index 0000000..d172676 --- /dev/null +++ b/regressions/ck_ec/validate/prop_test_slow_wakeup.c @@ -0,0 +1,110 @@ +#include <assert.h> +#include <ck_ec.h> + +#include "fuzz_harness.h" + +static int gettime(const struct ck_ec_ops *, struct timespec *out); +static void wake32(const struct ck_ec_ops *, const uint32_t *); +static void wait32(const struct ck_ec_wait_state *, const uint32_t *, + uint32_t, const struct timespec *); +static void wake64(const struct ck_ec_ops *, const uint64_t *); +static void wait64(const struct ck_ec_wait_state *, const uint64_t *, + uint64_t, const struct timespec *); + +static const struct ck_ec_ops test_ops = { + .gettime = gettime, + .wait32 = wait32, + .wait64 = wait64, + .wake32 = wake32, + .wake64 = wake64 +}; + +static int gettime(const struct ck_ec_ops *ops, struct timespec *out) +{ + (void)out; + + assert(ops == &test_ops); + return -1; +} + +static void wait32(const struct ck_ec_wait_state *wait_state, + const uint32_t *addr, uint32_t expected, + const struct timespec *deadline) +{ + (void)addr; + (void)expected; + (void)deadline; + + assert(wait_state->ops == &test_ops); + return; +} + +static void wait64(const struct ck_ec_wait_state *wait_state, + const uint64_t *addr, uint64_t expected, + const struct timespec *deadline) +{ + (void)addr; + (void)expected; + (void)deadline; + + assert(wait_state->ops == &test_ops); + return; +} + +static void wake32(const struct ck_ec_ops *ops, const uint32_t *addr) +{ + (void)addr; + + assert(ops == &test_ops); + return; +} + +static void wake64(const struct ck_ec_ops *ops, const uint64_t *addr) +{ + (void)addr; + + assert(ops == &test_ops); + return; +} + +/* + * Check that calling ck_ec{32,64}_wake always clears the waiting bit. + */ + +struct example { + uint64_t value; +}; + +const struct example examples[] = { + { 0 }, + { 1 }, + { 1UL << 30 }, + { 1UL << 31 }, + { INT32_MAX }, + { INT64_MAX }, + { 1ULL << 62 }, + { 1ULL << 63 }, +}; + +static inline int test_slow_wakeup(const struct example *example) +{ + { + struct ck_ec32 ec = { .counter = example->value }; + + ck_ec32_wake(&ec, &test_ops); + assert(!ck_ec32_has_waiters(&ec)); + } + +#ifdef CK_F_EC64 + { + struct ck_ec64 ec = { .counter = example->value }; + + ck_ec64_wake(&ec, &test_ops); + assert(!ck_ec64_has_waiters(&ec)); + } +#endif /* CK_F_EC64 */ + + return 0; +} + +TEST(test_slow_wakeup, examples) diff --git a/regressions/ck_ec/validate/prop_test_timeutil_add.c b/regressions/ck_ec/validate/prop_test_timeutil_add.c new file mode 100644 index 0000000..bd44607 --- /dev/null +++ b/regressions/ck_ec/validate/prop_test_timeutil_add.c @@ -0,0 +1,101 @@ +#include <assert.h> +#include <ck_limits.h> +#include <ck_stdint.h> + +#include "../../../src/ck_ec_timeutil.h" +#include "fuzz_harness.h" + +#if ULONG_MAX > 4294967295 +typedef unsigned __int128 dword_t; +#else +typedef uint64_t dword_t; +#endif + +struct example { + struct timespec ts; + struct timespec inc; +}; + +static const struct example examples[] = { + { + { + 42, + 100 + }, + { + 1, + 2 + } + }, + { + { + 42, + 100 + }, + { + 1, + NSEC_MAX + } + }, + { + { + 42, + NSEC_MAX + }, + { + 0, + NSEC_MAX + } + }, + { + { + TIME_MAX - 1, + 1000 + }, + { + 2, + NSEC_MAX + } + } +}; + +static struct timespec normalize_ts(const struct timespec ts) +{ + struct timespec ret = ts; + + if (ret.tv_sec < 0) { + ret.tv_sec = ~ret.tv_sec; + } + + if (ret.tv_nsec < 0) { + ret.tv_nsec = ~ret.tv_nsec; + } + + ret.tv_nsec %= NSEC_MAX + 1; + return ret; +} + +static dword_t ts_to_nanos(const struct timespec ts) +{ + return (dword_t)ts.tv_sec * (NSEC_MAX + 1) + ts.tv_nsec; +} + +static inline int test_timespec_add(const struct example *example) +{ + const struct timespec ts = normalize_ts(example->ts); + const struct timespec inc = normalize_ts(example->inc); + const struct timespec actual = timespec_add(ts, inc); + const dword_t nanos = ts_to_nanos(ts) + ts_to_nanos(inc); + + if (nanos / (NSEC_MAX + 1) > TIME_MAX) { + assert(actual.tv_sec == TIME_MAX); + assert(actual.tv_nsec == NSEC_MAX); + } else { + assert(actual.tv_sec == (time_t)(nanos / (NSEC_MAX + 1))); + assert(actual.tv_nsec == (long)(nanos % (NSEC_MAX + 1))); + } + + return 0; +} + +TEST(test_timespec_add, examples) diff --git a/regressions/ck_ec/validate/prop_test_timeutil_add_ns.c b/regressions/ck_ec/validate/prop_test_timeutil_add_ns.c new file mode 100644 index 0000000..b62e1c7 --- /dev/null +++ b/regressions/ck_ec/validate/prop_test_timeutil_add_ns.c @@ -0,0 +1,88 @@ +#include <assert.h> + +#include "../../../src/ck_ec_timeutil.h" +#include "fuzz_harness.h" + +#if ULONG_MAX > 4294967295 +typedef unsigned __int128 dword_t; +#else +typedef uint64_t dword_t; +#endif + +struct example { + struct timespec ts; + uint32_t ns; +}; + +static const struct example examples[] = { + { + { + 42, + 100 + }, + 1 + }, + { + { + 42, + 100 + }, + 2 * NSEC_MAX + }, + { + { + 42, + NSEC_MAX + }, + NSEC_MAX + }, + { + { + TIME_MAX - 1, + 1000 + }, + 2 * NSEC_MAX + } +}; + +static inline int test_timespec_add_ns(const struct example *example) +{ + struct timespec ts = { + .tv_sec = example->ts.tv_sec, + .tv_nsec = example->ts.tv_nsec + }; + const uint32_t ns = example->ns; + + if (ts.tv_sec < 0) { + ts.tv_sec = ~ts.tv_sec; + } + + if (ts.tv_nsec < 0) { + ts.tv_nsec = ~ts.tv_nsec; + } + + ts.tv_nsec %= NSEC_MAX + 1; + + const struct timespec actual = timespec_add_ns(ts, ns); + + dword_t nanos = + (dword_t)ts.tv_sec * (NSEC_MAX + 1) + ts.tv_nsec; + + if (ns > NSEC_MAX) { + nanos += NSEC_MAX + 1; + } else { + nanos += ns; + } + + if (nanos / (NSEC_MAX + 1) > TIME_MAX) { + assert(actual.tv_sec == TIME_MAX); + assert(actual.tv_nsec == NSEC_MAX); + } else { + assert(actual.tv_sec == (time_t)(nanos / (NSEC_MAX + 1))); + assert(actual.tv_nsec == (long)(nanos % (NSEC_MAX + 1))); + } + + return 0; +} + +TEST(test_timespec_add_ns, examples) diff --git a/regressions/ck_ec/validate/prop_test_timeutil_cmp.c b/regressions/ck_ec/validate/prop_test_timeutil_cmp.c new file mode 100644 index 0000000..00e7b2e --- /dev/null +++ b/regressions/ck_ec/validate/prop_test_timeutil_cmp.c @@ -0,0 +1,99 @@ +#include <assert.h> + +#include "../../../src/ck_ec_timeutil.h" +#include "fuzz_harness.h" + +#if ULONG_MAX > 4294967295 +typedef __int128 dsword_t; +#else +typedef int64_t dsword_t; +#endif + +struct example { + struct timespec x; + struct timespec y; +}; + +static const struct example examples[] = { + { + { + 42, + 100 + }, + { + 1, + 2 + } + }, + { + { + 42, + 100 + }, + { + 1, + NSEC_MAX + } + }, + { + { + 42, + NSEC_MAX + }, + { + 0, + NSEC_MAX + } + }, + { + { + TIME_MAX - 1, + 1000 + }, + { + 2, + NSEC_MAX + } + } +}; + +static struct timespec normalize_ts(const struct timespec ts) +{ + struct timespec ret = ts; + + if (ret.tv_nsec < 0) { + ret.tv_nsec = ~ret.tv_nsec; + } + + ret.tv_nsec %= NSEC_MAX + 1; + return ret; +} + +static dsword_t ts_to_nanos(const struct timespec ts) +{ + return (dsword_t)ts.tv_sec * (NSEC_MAX + 1) + ts.tv_nsec; +} + +static inline int test_timespec_cmp(const struct example *example) +{ + const struct timespec x = normalize_ts(example->y); + const struct timespec y = normalize_ts(example->x); + const dsword_t x_nanos = ts_to_nanos(x); + const dsword_t y_nanos = ts_to_nanos(y); + + assert(timespec_cmp(x, x) == 0); + assert(timespec_cmp(y, y) == 0); + assert(timespec_cmp(x, y) == -timespec_cmp(y, x)); + + if (x_nanos == y_nanos) { + assert(timespec_cmp(x, y) == 0); + } else if (x_nanos < y_nanos) { + assert(timespec_cmp(x, y) == -1); + } else { + assert(timespec_cmp(x, y) == 1); + } + + return 0; +} + +TEST(test_timespec_cmp, examples) diff --git a/regressions/ck_ec/validate/prop_test_timeutil_scale.c b/regressions/ck_ec/validate/prop_test_timeutil_scale.c new file mode 100644 index 0000000..eb3040f --- /dev/null +++ b/regressions/ck_ec/validate/prop_test_timeutil_scale.c @@ -0,0 +1,41 @@ +#include <assert.h> + +#include "../../../src/ck_ec_timeutil.h" +#include "fuzz_harness.h" + +struct example { + uint32_t nsec; + uint32_t multiplier; + unsigned int shift; +}; + +static const struct example examples[] = { + { + UINT32_MAX, + UINT32_MAX, + 1 + }, + { + 10, + 20, + 0 + } +}; + +static inline int test_wait_time_scale(const struct example *example) +{ + const uint32_t nsec = example->nsec; + const uint32_t multiplier = example->multiplier; + const unsigned int shift = example->shift % 32; + uint32_t actual = wait_time_scale(nsec, multiplier, shift); + uint64_t expected = ((uint64_t)nsec * multiplier) >> shift; + + if (expected > UINT32_MAX) { + expected = UINT32_MAX; + } + + assert(actual == expected); + return 0; +} + +TEST(test_wait_time_scale, examples) diff --git a/regressions/ck_ec/validate/prop_test_value.c b/regressions/ck_ec/validate/prop_test_value.c new file mode 100644 index 0000000..8f9eab8 --- /dev/null +++ b/regressions/ck_ec/validate/prop_test_value.c @@ -0,0 +1,150 @@ +#include <assert.h> +#include <ck_ec.h> + +#include "fuzz_harness.h" + +static int gettime(const struct ck_ec_ops *, struct timespec *out); +static void wake32(const struct ck_ec_ops *, const uint32_t *); +static void wait32(const struct ck_ec_wait_state *, const uint32_t *, + uint32_t, const struct timespec *); +static void wake64(const struct ck_ec_ops *, const uint64_t *); +static void wait64(const struct ck_ec_wait_state *, const uint64_t *, + uint64_t, const struct timespec *); + +static const struct ck_ec_ops test_ops = { + .gettime = gettime, + .wait32 = wait32, + .wait64 = wait64, + .wake32 = wake32, + .wake64 = wake64 +}; + +static const struct ck_ec_mode modes[] = { + { + .single_producer = true, + .ops = &test_ops + }, + { + .single_producer = false, + .ops = &test_ops + }, +}; + +static int gettime(const struct ck_ec_ops *ops, struct timespec *out) +{ + (void)out; + + assert(ops == &test_ops); + return -1; +} + +static void wait32(const struct ck_ec_wait_state *wait_state, + const uint32_t *addr, uint32_t expected, + const struct timespec *deadline) +{ + (void)addr; + (void)expected; + (void)deadline; + + assert(wait_state->ops == &test_ops); + return; +} + +static void wait64(const struct ck_ec_wait_state *wait_state, + const uint64_t *addr, uint64_t expected, + const struct timespec *deadline) +{ + (void)addr; + (void)expected; + (void)deadline; + + assert(wait_state->ops == &test_ops); + return; +} + +static void wake32(const struct ck_ec_ops *ops, const uint32_t *addr) +{ + (void)addr; + + assert(ops == &test_ops); + return; +} + +static void wake64(const struct ck_ec_ops *ops, const uint64_t *addr) +{ + (void)addr; + + assert(ops == &test_ops); + return; +} + +/* + * Check that adding a value correctly updates the counter, and that + * incrementing after that also works. + */ +struct example { + uint64_t value[2]; +}; + +static const struct example examples[] = { + { { 0, 0 } }, + { { 1, 2 } }, + { { 0, INT32_MAX - 2 } }, + { { 0, INT32_MAX - 1 } }, + { { 0, INT32_MAX } }, + { { 0, INT64_MAX - 2 } }, + { { 0, INT64_MAX - 1 } }, + { { 0, INT64_MAX } }, +}; + +static inline int test_value(const struct example *example) +{ + for (size_t i = 0; i < 2; i++) { + const struct ck_ec_mode *mode = &modes[i]; + const uint32_t value0 = example->value[0] & INT32_MAX; + const uint32_t value1 = example->value[1] & INT32_MAX; + struct ck_ec32 ec; + + ck_ec32_init(&ec, 0); + assert(ck_ec32_value(&ec) == 0); + + ck_ec32_add(&ec, mode, value0); + assert(ck_ec32_value(&ec) == value0); + + ck_ec32_add(&ec, mode, value1); + assert(ck_ec32_value(&ec) == + ((value0 + value1) & INT32_MAX)); + + + ck_ec32_inc(&ec, mode); + assert(ck_ec32_value(&ec) == + ((value0 + value1 + 1) & INT32_MAX)); + } + +#ifdef CK_F_EC64 + for (size_t i = 0; i < 2; i++) { + const struct ck_ec_mode *mode = &modes[i]; + const uint64_t value0 = example->value[0] & INT64_MAX; + const uint64_t value1 = example->value[1] & INT64_MAX; + struct ck_ec64 ec; + + ck_ec64_init(&ec, 0); + assert(ck_ec64_value(&ec) == 0); + + ck_ec64_add(&ec, mode, value0); + assert(ck_ec64_value(&ec) == value0); + + ck_ec64_add(&ec, mode, value1); + assert(ck_ec64_value(&ec) == + ((value0 + value1) & INT64_MAX)); + + ck_ec64_inc(&ec, mode); + assert(ck_ec64_value(&ec) == + ((value0 + value1 + 1) & INT64_MAX)); + } +#endif /* CK_F_EC64 */ + + return 0; +} + +TEST(test_value, examples) diff --git a/regressions/ck_ec/validate/prop_test_wakeup.c b/regressions/ck_ec/validate/prop_test_wakeup.c new file mode 100644 index 0000000..a858e2b --- /dev/null +++ b/regressions/ck_ec/validate/prop_test_wakeup.c @@ -0,0 +1,193 @@ +#include <assert.h> +#include <ck_ec.h> +#include <ck_stdbool.h> + +#include "fuzz_harness.h" + +static int gettime(const struct ck_ec_ops *, struct timespec *out); +static void wake32(const struct ck_ec_ops *, const uint32_t *); +static void wait32(const struct ck_ec_wait_state *, const uint32_t *, + uint32_t, const struct timespec *); +static void wake64(const struct ck_ec_ops *, const uint64_t *); +static void wait64(const struct ck_ec_wait_state *, const uint64_t *, + uint64_t, const struct timespec *); + +static const struct ck_ec_ops test_ops = { + .gettime = gettime, + .wait32 = wait32, + .wait64 = wait64, + .wake32 = wake32, + .wake64 = wake64 +}; + +static const struct ck_ec_mode modes[] = { + { + .single_producer = true, + .ops = &test_ops + }, + { + .single_producer = false, + .ops = &test_ops + }, +}; + +static bool woken = false; + +static int gettime(const struct ck_ec_ops *ops, struct timespec *out) +{ + (void)out; + + assert(ops == &test_ops); + return -1; +} + +static void wait32(const struct ck_ec_wait_state *state, const uint32_t *addr, + uint32_t expected, const struct timespec *deadline) +{ + (void)addr; + (void)expected; + (void)deadline; + + assert(state->ops == &test_ops); + return; +} + +static void wait64(const struct ck_ec_wait_state *state, const uint64_t *addr, + uint64_t expected, const struct timespec *deadline) +{ + (void)addr; + (void)expected; + (void)deadline; + + assert(state->ops == &test_ops); + return; +} + +static void wake32(const struct ck_ec_ops *ops, const uint32_t *addr) +{ + (void)addr; + + assert(ops == &test_ops); + woken = true; + return; +} + +static void wake64(const struct ck_ec_ops *ops, const uint64_t *addr) +{ + (void)addr; + + assert(ops == &test_ops); + woken = true; + return; +} + +/* + * Check that adding a value calls the wake function when the sign bit + * is set, and does not call it when the sign bit is unset (modulo + * wrap-around). + */ +struct example { + uint64_t initial; + uint64_t increment; +}; + +const struct example examples[] = { + { INT32_MAX, 0 }, + { INT32_MAX, 1 }, + { 0 + (0U << 31), 0 }, + { 1 + (0U << 31), 0 }, + { 0 + (1U << 31), 0 }, + { 1 + (1U << 31), 0 }, + + { 0 + (0U << 31), 1 }, + { 1 + (0U << 31), 1 }, + { 0 + (1U << 31), 1 }, + { 1 + (1U << 31), 1 }, + + { 0 + (0U << 31), INT32_MAX }, + { 1 + (0U << 31), INT32_MAX }, + { 0 + (1U << 31), INT32_MAX }, + { 1 + (1U << 31), INT32_MAX }, + + { INT64_MAX, 0 }, + { INT64_MAX, 1 }, + { 0 + (0ULL << 63), 0 }, + { 1 + (0ULL << 63), 0 }, + { 0 + (1ULL << 63), 0 }, + { 1 + (1ULL << 63), 0 }, + + { 0 + (0ULL << 63), 1 }, + { 1 + (0ULL << 63), 1 }, + { 0 + (1ULL << 63), 1 }, + { 1 + (1ULL << 63), 1 }, + + { 0 + (0ULL << 63), INT64_MAX }, + { 1 + (0ULL << 63), INT64_MAX }, + { 0 + (1ULL << 63), INT64_MAX }, + { 1 + (1ULL << 63), INT64_MAX }, +}; + +static inline int test_wakeup(const struct example *example) +{ + for (size_t i = 0; i < 2; i++) { + const struct ck_ec_mode *mode = &modes[i]; + const uint32_t increment = example->increment & INT32_MAX; + struct ck_ec32 ec; + bool should_wake; + bool may_wake; + + ec.counter = example->initial; + should_wake = increment != 0 && (ec.counter & (1U << 31)); + may_wake = should_wake || (ec.counter & (1U << 31)); + + woken = false; + ck_ec32_add(&ec, mode, increment); + assert(!should_wake || woken); + assert(may_wake || !woken); + assert(!woken || ck_ec32_has_waiters(&ec) == false); + + /* Test inc now. */ + ec.counter = example->initial + increment; + should_wake = ec.counter & (1U << 31); + may_wake = should_wake || ((ec.counter + 1) & (1U << 31)); + + woken = false; + ck_ec32_inc(&ec, mode); + assert(!should_wake || woken); + assert(may_wake || !woken); + assert(!woken || ck_ec32_has_waiters(&ec) == false); + } + +#ifdef CK_F_EC64 + for (size_t i = 0; i < 2; i++) { + const struct ck_ec_mode *mode = &modes[i]; + const uint64_t increment = example->increment & INT64_MAX; + struct ck_ec64 ec; + bool should_wake; + bool may_wake; + + ec.counter = example->initial; + should_wake = increment != 0 && (ec.counter & 1); + may_wake = should_wake || (ec.counter & 1); + + woken = false; + ck_ec64_add(&ec, mode, increment); + assert(!should_wake || woken); + assert(may_wake || !woken); + assert(!woken || ck_ec64_has_waiters(&ec) == false); + + /* Test inc now. */ + ec.counter = example->initial + increment; + should_wake = ec.counter & 1; + + woken = false; + ck_ec64_inc(&ec, mode); + assert(should_wake == woken); + assert(!woken || ck_ec64_has_waiters(&ec) == false); + } +#endif /* CK_F_EC64 */ + + return 0; +} + +TEST(test_wakeup, examples) |