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https://github.com/AsahiLinux/u-boot
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99aca9efe1
If the buffer is empty and not allocated, then abuf_realloc() tries to copy invalid data. This happens because an incorrect change to use memdup() was added after the original code was written. Signed-off-by: Simon Glass <sjg@chromium.org>
373 lines
8.6 KiB
C
373 lines
8.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2021 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <abuf.h>
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#include <mapmem.h>
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#include <test/lib.h>
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#include <test/test.h>
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#include <test/ut.h>
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static char test_data[] = "1234";
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#define TEST_DATA_LEN sizeof(test_data)
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/* Test abuf_set() */
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static int lib_test_abuf_set(struct unit_test_state *uts)
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{
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struct abuf buf;
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ulong start;
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start = ut_check_free();
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abuf_init(&buf);
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abuf_set(&buf, test_data, TEST_DATA_LEN);
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ut_asserteq_ptr(test_data, buf.data);
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ut_asserteq(TEST_DATA_LEN, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Force it to allocate */
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ut_asserteq(true, abuf_realloc(&buf, TEST_DATA_LEN + 1));
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ut_assertnonnull(buf.data);
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ut_asserteq(TEST_DATA_LEN + 1, buf.size);
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ut_asserteq(true, buf.alloced);
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/* Now set it again, to force it to free */
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abuf_set(&buf, test_data, TEST_DATA_LEN);
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ut_asserteq_ptr(test_data, buf.data);
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ut_asserteq(TEST_DATA_LEN, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Check for memory leaks */
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ut_assertok(ut_check_delta(start));
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return 0;
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}
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LIB_TEST(lib_test_abuf_set, 0);
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/* Test abuf_map_sysmem() */
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static int lib_test_abuf_map_sysmem(struct unit_test_state *uts)
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{
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struct abuf buf;
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ulong addr;
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abuf_init(&buf);
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addr = 0x100;
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abuf_map_sysmem(&buf, addr, TEST_DATA_LEN);
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ut_asserteq_ptr(map_sysmem(0x100, 0), buf.data);
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ut_asserteq(TEST_DATA_LEN, buf.size);
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ut_asserteq(false, buf.alloced);
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return 0;
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}
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LIB_TEST(lib_test_abuf_map_sysmem, 0);
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/* Test abuf_realloc() */
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static int lib_test_abuf_realloc(struct unit_test_state *uts)
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{
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struct abuf buf;
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ulong start;
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void *ptr;
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/*
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* TODO: crashes on sandbox sometimes due to an apparent bug in
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* realloc().
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*/
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return 0;
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start = ut_check_free();
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abuf_init(&buf);
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/* Allocate an empty buffer */
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ut_asserteq(true, abuf_realloc(&buf, 0));
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Allocate a non-empty abuf */
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ut_asserteq(true, abuf_realloc(&buf, TEST_DATA_LEN));
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ut_assertnonnull(buf.data);
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ut_asserteq(TEST_DATA_LEN, buf.size);
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ut_asserteq(true, buf.alloced);
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ptr = buf.data;
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/*
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* Make it smaller; the pointer should remain the same. Note this relies
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* on knowledge of how U-Boot's realloc() works
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*/
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ut_asserteq(true, abuf_realloc(&buf, TEST_DATA_LEN - 1));
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ut_asserteq(TEST_DATA_LEN - 1, buf.size);
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ut_asserteq(true, buf.alloced);
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ut_asserteq_ptr(ptr, buf.data);
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/*
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* Make it larger, forcing reallocation. Note this relies on knowledge
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* of how U-Boot's realloc() works
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*/
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ut_asserteq(true, abuf_realloc(&buf, 0x1000));
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ut_assert(buf.data != ptr);
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ut_asserteq(0x1000, buf.size);
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ut_asserteq(true, buf.alloced);
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/* Free it */
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ut_asserteq(true, abuf_realloc(&buf, 0));
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Check for memory leaks */
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ut_assertok(ut_check_delta(start));
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return 0;
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}
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LIB_TEST(lib_test_abuf_realloc, 0);
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/* Test abuf_realloc() on an non-allocated buffer of zero size */
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static int lib_test_abuf_realloc_size(struct unit_test_state *uts)
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{
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struct abuf buf;
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ulong start;
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start = ut_check_free();
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abuf_init(&buf);
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/* Allocate some space */
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ut_asserteq(true, abuf_realloc(&buf, TEST_DATA_LEN));
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ut_assertnonnull(buf.data);
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ut_asserteq(TEST_DATA_LEN, buf.size);
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ut_asserteq(true, buf.alloced);
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/* Free it */
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ut_asserteq(true, abuf_realloc(&buf, 0));
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Check for memory leaks */
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ut_assertok(ut_check_delta(start));
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return 0;
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}
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LIB_TEST(lib_test_abuf_realloc_size, 0);
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/* Test handling of buffers that are too large */
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static int lib_test_abuf_large(struct unit_test_state *uts)
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{
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struct abuf buf;
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ulong start;
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size_t size;
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int delta;
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void *ptr;
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/*
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* This crashes at present due to trying to allocate more memory than
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* available, which breaks something on sandbox.
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*/
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return 0;
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start = ut_check_free();
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/* Try an impossible size */
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abuf_init(&buf);
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ut_asserteq(false, abuf_realloc(&buf, CONFIG_SYS_MALLOC_LEN));
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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abuf_uninit(&buf);
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Start with a normal size then try to increase it, to check realloc */
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ut_asserteq(true, abuf_realloc(&buf, TEST_DATA_LEN));
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ut_assertnonnull(buf.data);
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ut_asserteq(TEST_DATA_LEN, buf.size);
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ut_asserteq(true, buf.alloced);
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ptr = buf.data;
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delta = ut_check_delta(start);
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ut_assert(delta > 0);
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/* try to increase it */
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ut_asserteq(false, abuf_realloc(&buf, CONFIG_SYS_MALLOC_LEN));
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ut_asserteq_ptr(ptr, buf.data);
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ut_asserteq(TEST_DATA_LEN, buf.size);
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ut_asserteq(true, buf.alloced);
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ut_asserteq(delta, ut_check_delta(start));
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/* Check for memory leaks */
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abuf_uninit(&buf);
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ut_assertok(ut_check_delta(start));
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/* Start with a huge unallocated buf and try to move it */
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abuf_init(&buf);
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abuf_map_sysmem(&buf, 0, CONFIG_SYS_MALLOC_LEN);
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ut_asserteq(CONFIG_SYS_MALLOC_LEN, buf.size);
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ut_asserteq(false, buf.alloced);
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ut_assertnull(abuf_uninit_move(&buf, &size));
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/* Check for memory leaks */
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abuf_uninit(&buf);
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ut_assertok(ut_check_delta(start));
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return 0;
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}
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LIB_TEST(lib_test_abuf_large, 0);
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/* Test abuf_uninit_move() */
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static int lib_test_abuf_uninit_move(struct unit_test_state *uts)
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{
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void *ptr, *orig_ptr;
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struct abuf buf;
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size_t size;
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ulong start;
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int delta;
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start = ut_check_free();
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/*
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* TODO: crashes on sandbox sometimes due to an apparent bug in
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* realloc().
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*/
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return 0;
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/* Move an empty buffer */
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abuf_init(&buf);
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ut_assertnull(abuf_uninit_move(&buf, &size));
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ut_asserteq(0, size);
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ut_assertnull(abuf_uninit_move(&buf, NULL));
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/* Move an unallocated buffer */
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abuf_set(&buf, test_data, TEST_DATA_LEN);
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ut_assertok(ut_check_delta(start));
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ptr = abuf_uninit_move(&buf, &size);
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ut_asserteq(TEST_DATA_LEN, size);
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ut_asserteq_str(ptr, test_data);
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ut_assertnonnull(ptr);
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Check that freeing it frees the only allocation */
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delta = ut_check_delta(start);
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ut_assert(delta > 0);
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free(ptr);
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ut_assertok(ut_check_delta(start));
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/* Move an allocated buffer */
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ut_asserteq(true, abuf_realloc(&buf, TEST_DATA_LEN));
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orig_ptr = buf.data;
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strcpy(orig_ptr, test_data);
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delta = ut_check_delta(start);
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ut_assert(delta > 0);
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ptr = abuf_uninit_move(&buf, &size);
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ut_asserteq(TEST_DATA_LEN, size);
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ut_assertnonnull(ptr);
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ut_asserteq_ptr(ptr, orig_ptr);
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ut_asserteq_str(ptr, test_data);
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Check there was no new allocation */
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ut_asserteq(delta, ut_check_delta(start));
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/* Check that freeing it frees the only allocation */
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free(ptr);
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ut_assertok(ut_check_delta(start));
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/* Move an unallocated buffer, without the size */
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abuf_set(&buf, test_data, TEST_DATA_LEN);
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ut_assertok(ut_check_delta(start));
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ptr = abuf_uninit_move(&buf, NULL);
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ut_asserteq_str(ptr, test_data);
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return 0;
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}
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LIB_TEST(lib_test_abuf_uninit_move, 0);
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/* Test abuf_uninit() */
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static int lib_test_abuf_uninit(struct unit_test_state *uts)
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{
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struct abuf buf;
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/* Nothing in the buffer */
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abuf_init(&buf);
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abuf_uninit(&buf);
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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/* Not allocated */
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abuf_set(&buf, test_data, TEST_DATA_LEN);
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abuf_uninit(&buf);
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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return 0;
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}
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LIB_TEST(lib_test_abuf_uninit, 0);
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/* Test abuf_init_set() */
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static int lib_test_abuf_init_set(struct unit_test_state *uts)
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{
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struct abuf buf;
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abuf_init_set(&buf, test_data, TEST_DATA_LEN);
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ut_asserteq_ptr(test_data, buf.data);
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ut_asserteq(TEST_DATA_LEN, buf.size);
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ut_asserteq(false, buf.alloced);
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return 0;
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}
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LIB_TEST(lib_test_abuf_init_set, 0);
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/* Test abuf_init_move() */
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static int lib_test_abuf_init_move(struct unit_test_state *uts)
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{
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struct abuf buf;
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void *ptr;
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/*
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* TODO: crashes on sandbox sometimes due to an apparent bug in
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* realloc().
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*/
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return 0;
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ptr = strdup(test_data);
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ut_assertnonnull(ptr);
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free(ptr);
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abuf_init_move(&buf, ptr, TEST_DATA_LEN);
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ut_asserteq_ptr(ptr, abuf_data(&buf));
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ut_asserteq(TEST_DATA_LEN, abuf_size(&buf));
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ut_asserteq(true, buf.alloced);
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return 0;
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}
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LIB_TEST(lib_test_abuf_init_move, 0);
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/* Test abuf_init() */
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static int lib_test_abuf_init(struct unit_test_state *uts)
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{
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struct abuf buf;
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buf.data = &buf;
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buf.size = 123;
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buf.alloced = true;
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abuf_init(&buf);
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ut_assertnull(buf.data);
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ut_asserteq(0, buf.size);
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ut_asserteq(false, buf.alloced);
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return 0;
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}
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LIB_TEST(lib_test_abuf_init, 0);
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