Add more xallocx() overflow tests.
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@ -122,6 +122,68 @@ get_huge_size(size_t ind)
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return (get_size_impl("arenas.hchunk.0.size", ind));
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}
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TEST_BEGIN(test_size)
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{
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size_t small0, hugemax;
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void *p;
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/* Get size classes. */
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small0 = get_small_size(0);
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hugemax = get_huge_size(get_nhuge()-1);
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p = mallocx(small0, 0);
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assert_ptr_not_null(p, "Unexpected mallocx() error");
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/* Test smallest supported size. */
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assert_zu_eq(xallocx(p, 1, 0, 0), small0,
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"Unexpected xallocx() behavior");
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/* Test largest supported size. */
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assert_zu_le(xallocx(p, hugemax, 0, 0), hugemax,
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"Unexpected xallocx() behavior");
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/* Test size overflow. */
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assert_zu_le(xallocx(p, hugemax+1, 0, 0), hugemax,
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"Unexpected xallocx() behavior");
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assert_zu_le(xallocx(p, SIZE_T_MAX, 0, 0), hugemax,
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"Unexpected xallocx() behavior");
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dallocx(p, 0);
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}
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TEST_END
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TEST_BEGIN(test_size_extra_overflow)
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{
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size_t small0, hugemax;
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void *p;
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/* Get size classes. */
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small0 = get_small_size(0);
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hugemax = get_huge_size(get_nhuge()-1);
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p = mallocx(small0, 0);
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assert_ptr_not_null(p, "Unexpected mallocx() error");
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/* Test overflows that can be resolved by clamping extra. */
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assert_zu_le(xallocx(p, hugemax-1, 2, 0), hugemax,
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"Unexpected xallocx() behavior");
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assert_zu_le(xallocx(p, hugemax, 1, 0), hugemax,
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"Unexpected xallocx() behavior");
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/* Test overflow such that hugemax-size underflows. */
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assert_zu_le(xallocx(p, hugemax+1, 2, 0), hugemax,
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"Unexpected xallocx() behavior");
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assert_zu_le(xallocx(p, hugemax+2, 3, 0), hugemax,
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"Unexpected xallocx() behavior");
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assert_zu_le(xallocx(p, SIZE_T_MAX-2, 2, 0), hugemax,
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"Unexpected xallocx() behavior");
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assert_zu_le(xallocx(p, SIZE_T_MAX-1, 1, 0), hugemax,
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"Unexpected xallocx() behavior");
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dallocx(p, 0);
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}
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TEST_END
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TEST_BEGIN(test_extra_small)
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{
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size_t small0, small1, hugemax;
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@ -293,6 +355,8 @@ main(void)
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test_same_size,
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test_extra_no_move,
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test_no_move_fail,
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test_size,
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test_size_extra_overflow,
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test_extra_small,
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test_extra_large,
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test_extra_huge));
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