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Diffstat (limited to 'tests/test-progs/asmtest/src/riscv/isa/rv64samt/sysfutex_d.S')
| -rw-r--r-- | tests/test-progs/asmtest/src/riscv/isa/rv64samt/sysfutex_d.S | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/tests/test-progs/asmtest/src/riscv/isa/rv64samt/sysfutex_d.S b/tests/test-progs/asmtest/src/riscv/isa/rv64samt/sysfutex_d.S new file mode 100644 index 000000000..707bdfa92 --- /dev/null +++ b/tests/test-progs/asmtest/src/riscv/isa/rv64samt/sysfutex_d.S @@ -0,0 +1,193 @@ +/* + * Copyright (c) 2018, Cornell University + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 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. + * + * Neither the name of Cornell University nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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. + * + * Authors: Tuan Ta + */ + +//------------------------------------------------------------------------ +// sysfutex_d tests basic functionalities of futex system call: +// - make a thread wait on a variable +// - wake up a thread waiting on a variable +//------------------------------------------------------------------------ + +#include "riscv_test.h" +#include "test_macros.h" +#include "test_macros_mt_ecall.h" + + RVTEST_RV64U + RVTEST_CODE_BEGIN + +#define NUM_THREADS 1 +#define LOOP_COUNT 1000 + +//------------------------------------------------------------------------ +// Master thread creates new threads, call _master function, waits for all +// threads to complete, deallocates threads and checks result +//------------------------------------------------------------------------ + li a0, NUM_THREADS + call _create_threads + + la t6, n_worker_threads + ld a0, (t6) + beqz a0, _fail // exit if there's no worker thread + call _master_work + + la t6, n_worker_threads + ld a0, (t6) + call _join + + la t6, n_worker_threads + ld a0, (t6) + call _check + + la t6, n_worker_threads + ld a0, (t6) + call _delete_threads + + li a0, SUCCESS + + RVTEST_CODE_END + +//------------------------------------------------------------------------ +// master_work function executed by the parent/master thread +// +// Wake up thread(s) waiting on futex_X and then wait on futex_Y in a +// loop. +//------------------------------------------------------------------------ +_master_work: + mv s0, ra // save return address + li t0, LOOP_COUNT + la t1, count_master + +1: + // futex(futex_X, FUTEX_WAKE_PRIVATE, 1) + la a0, futex_X + li a1, FUTEX_WAKE_PRIVATE + li a2, 1 // wake up at most 1 thread + li a7, SYSCALL_FUTEX + ecall + + // keep waking up until at least one thread is waken up + beqz a0, 1b + + // increment count_master + ld t2, (t1) + addi t2, t2, 1 + sd t2, (t1) + + // futex(futex_Y, FUTEX_WAIT_PRIVATE, 0) + la a0, futex_Y + li a1, FUTEX_WAIT_PRIVATE + li a2, 0 // expected val of futex_Y + li a7, SYSCALL_FUTEX + ecall + + // decrement t0 + addi t0, t0, -1 + bnez t0, 1b + + // restore return address and return + mv ra, s0 + ret + +//------------------------------------------------------------------------ +// mt_test function executed by child threads +// +// Wait on futex_X and then wake up threads waiting on futex_Y in a loop +//------------------------------------------------------------------------ +_mt_test: + li t0, LOOP_COUNT + la t1, count_child + +1: + // futex(futex_X, FUTEX_WAIT_PRIVATE, 1) + la a0, futex_X + li a1, FUTEX_WAIT_PRIVATE + li a2, 0 // expected val of futex_X + li a7, SYSCALL_FUTEX + ecall + + // increment count_child + ld t2, (t1) + addi t2, t2, 1 + sd t2, (t1) + +2: + // futex(futex_Y, FUTEX_WAKE_PRIVATE, 0) + la a0, futex_Y + li a1, FUTEX_WAKE_PRIVATE + li a2, 1 // wake up at most 1 thread + li a7, SYSCALL_FUTEX + ecall + + // keep waking up until at least one thread is waken up + beqz a0, 2b + + // decrement t0 + addi t0, t0, -1 + bnez t0, 1b + + RVTEST_CODE_END + +//------------------------------------------------------------------------ +// _check: +// Each thread should do LOOP_COUNT iterations +//------------------------------------------------------------------------ + +_check: + la t0, count_master + la t1, count_child + li t2, LOOP_COUNT + + ld t0, (t0) + bne t0, t2, _fail + + ld t1, (t1) + bne t1, t2, _fail + + ret + +_fail: + li a0, FAILURE + RVTEST_CODE_END + + .data + +futex_X: .dword 0 +futex_Y: .dword 0 + +count_master: .dword 0 +count_child: .dword 0 + +MT_DATA |