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src/tests/iobuf_test.c
142 строки
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Michael Brown
[iobuf] Ensure I/O buffer data sits within unshared cachelines
07 июл 2025, 18:18
07 июл 2025, 18:18
19f1407
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/* * Copyright (C) 2016 Michael Brown <mbrown@fensystems.co.uk>. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. * * You can also choose to distribute this program under the terms of * the Unmodified Binary Distribution Licence (as given in the file * COPYING.UBDL), provided that you have satisfied its requirements. */ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); /** @file * * I/O buffer tests * */ /* Forcibly enable assertions */ #undef NDEBUG #include <stdint.h> #include <string.h> #include <assert.h> #include <ipxe/iobuf.h> #include <ipxe/io.h> #include <ipxe/test.h> /* Forward declaration */ struct self_test iobuf_test __self_test; /** * Report I/O buffer allocation test result * * @v len Required length of buffer * @v align Physical alignment * @v offset Offset from physical alignment * @v file Test code file * @v line Test code line */ static inline void alloc_iob_okx ( size_t len, size_t align, size_t offset, const char *file, unsigned int line ) { struct io_buffer *iobuf; /* Allocate I/O buffer */ iobuf = alloc_iob_raw ( len, align, offset ); okx ( iobuf != NULL, file, line ); DBGC ( &iobuf_test, "IOBUF %p (%#08lx+%#zx) for %#zx align %#zx " "offset %#zx\n", iobuf, virt_to_phys ( iobuf->data ), iob_tailroom ( iobuf ), len, align, offset ); /* Validate requested length and data alignment */ okx ( ( ( ( intptr_t ) iobuf ) & ( __alignof__ ( *iobuf ) - 1 ) ) == 0, file, line ); okx ( iob_tailroom ( iobuf ) >= len, file, line ); okx ( ( ( align == 0 ) || ( ( virt_to_phys ( iobuf->data ) & ( align - 1 ) ) == ( offset & ( align - 1 ) ) ) ), file, line ); /* Validate overall buffer alignment */ okx ( ( ( ( intptr_t ) iobuf->head ) & ( IOB_ZLEN - 1 ) ) == 0, file, line ); okx ( ( ( ( intptr_t ) iobuf->end ) & ( IOB_ZLEN - 1 ) ) == 0, file, line ); /* Overwrite entire content of I/O buffer (for Valgrind) */ memset ( iob_put ( iobuf, len ), 0x55, len ); /* Free I/O buffer */ free_iob ( iobuf ); } #define alloc_iob_ok( len, align, offset ) \ alloc_iob_okx ( len, align, offset, __FILE__, __LINE__ ) /** * Report I/O buffer allocation failure test result * * @v len Required length of buffer * @v align Physical alignment * @v offset Offset from physical alignment * @v file Test code file * @v line Test code line */ static inline void alloc_iob_fail_okx ( size_t len, size_t align, size_t offset, const char *file, unsigned int line ) { struct io_buffer *iobuf; /* Allocate I/O buffer */ iobuf = alloc_iob_raw ( len, align, offset ); okx ( iobuf == NULL, file, line ); } #define alloc_iob_fail_ok( len, align, offset ) \ alloc_iob_fail_okx ( len, align, offset, __FILE__, __LINE__ ) /** * Perform I/O buffer self-tests * */ static void iobuf_test_exec ( void ) { /* Check zero-length allocations */ alloc_iob_ok ( 0, 0, 0 ); alloc_iob_ok ( 0, 0, 1 ); alloc_iob_ok ( 0, 1, 0 ); alloc_iob_ok ( 0, 1024, 0 ); alloc_iob_ok ( 0, 139, -17 ); /* Check various sensible allocations */ alloc_iob_ok ( 1, 0, 0 ); alloc_iob_ok ( 16, 16, 0 ); alloc_iob_ok ( 64, 0, 0 ); alloc_iob_ok ( 65, 0, 0 ); alloc_iob_ok ( 65, 1024, 19 ); alloc_iob_ok ( 1536, 1536, 0 ); alloc_iob_ok ( 2048, 2048, 0 ); alloc_iob_ok ( 2048, 2048, -10 ); /* Excessively large or excessively aligned allocations should fail */ alloc_iob_fail_ok ( -1UL, 0, 0 ); alloc_iob_fail_ok ( -1UL, 1024, 0 ); alloc_iob_fail_ok ( 0, -1UL, 0 ); alloc_iob_fail_ok ( 1024, -1UL, 0 ); } /** I/O buffer self-test */ struct self_test iobuf_test __self_test = { .name = "iobuf", .exec = iobuf_test_exec, };