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codetoanalyze/cpp/bufferoverrun/class.cpp, access_after_new_Bad, 2, BUFFER_OVERRUN_L1, [Call,ArrayAccess: Offset: [15, 15] Size: [10, 10] @ codetoanalyze/cpp/bufferoverrun/class.cpp:28:34 by call `my_class_access_nth()` ]
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codetoanalyze/cpp/bufferoverrun/class.cpp, array_member_malloc2_Bad, 2, BUFFER_OVERRUN_L1, [Offset: [10, 10] Size: [5, 5]]
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codetoanalyze/cpp/bufferoverrun/class.cpp, array_member_malloc_Bad, 2, BUFFER_OVERRUN_L1, [Offset: [10, 10] Size: [5, 5]]
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codetoanalyze/cpp/bufferoverrun/class.cpp, flexible_array1_Bad, 3, BUFFER_OVERRUN_L1, [Offset: [5, 5] Size: [5, 5]]
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codetoanalyze/cpp/bufferoverrun/class.cpp, flexible_array4_Bad, 3, BUFFER_OVERRUN_L1, [Offset: [5, 5] Size: [5, 5]]
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codetoanalyze/cpp/bufferoverrun/class.cpp, flexible_array_param_Bad, 2, BUFFER_OVERRUN_L1, [Call,ArrayAccess: Offset: [3, 3] Size: [3, 3] @ codetoanalyze/cpp/bufferoverrun/class.cpp:165:50 by call `flexible_array_param_access()` ]
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codetoanalyze/cpp/bufferoverrun/class.cpp, my_class_access2_Bad, 2, BUFFER_OVERRUN_L1, [Call,Assignment,Call,Assignment,Return,ArrayAccess: Offset: [10, 10] Size: [10, 10]]
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codetoanalyze/cpp/bufferoverrun/class.cpp, my_class_access_Bad, 2, BUFFER_OVERRUN_L1, [Call,Call,Assignment,ArrayAccess: Offset: [10, 10] Size: [10, 10]]
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codetoanalyze/cpp/bufferoverrun/class.cpp, placement_new_Bad, 3, BUFFER_OVERRUN_L1, [Offset: [10, 10] Size: [5, 5]]
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codetoanalyze/cpp/bufferoverrun/external.cpp, extern_bad, 5, BUFFER_OVERRUN_L5, [Assignment,ArrayAccess: Offset: [-oo, +oo] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/external.cpp, extern_bad, 10, BUFFER_OVERRUN_L1, [ArrayDeclaration,ArrayAccess: Offset: [30, 30] Size: [10, 10]]
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codetoanalyze/cpp/bufferoverrun/folly_split.cpp, folly_split::do_not_ignore_empty_Bad, 3, BUFFER_OVERRUN_L4, [Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [0, 0] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/function_call.cpp, call_by_ref_bad, 4, BUFFER_OVERRUN_L1, [ArrayDeclaration,Call,Assignment,ArrayAccess: Offset: [-1, -1] Size: [10, 10]]
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codetoanalyze/cpp/bufferoverrun/remove_temps.cpp, C_foo_Bad, 1, CONDITION_ALWAYS_TRUE, []
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codetoanalyze/cpp/bufferoverrun/remove_temps.cpp, C_foo_Bad, 6, BUFFER_OVERRUN_L1, [ArrayDeclaration,ArrayAccess: Offset: [10, 10] Size: [5, 5]]
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codetoanalyze/cpp/bufferoverrun/remove_temps.cpp, C_goo, 1, CONDITION_ALWAYS_TRUE, []
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codetoanalyze/cpp/bufferoverrun/repro1.cpp, LM<TFM>_lI, 2, BUFFER_OVERRUN_L5, [Call,Assignment,Return,Assignment,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [0, +oo] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/repro1.cpp, LM<TFM>_uI_FP, 0, BUFFER_OVERRUN_S2, [Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [-1+max(1, s$4), -1+max(1, s$5)] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/repro1.cpp, LM<TFM>_u_FP, 5, BUFFER_OVERRUN_S2, [Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [-1+max(1, s$8), -1+max(1, s$9)] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/repro1.cpp, ral_FP, 3, BUFFER_OVERRUN_S2, [Call,Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [-1+max(1, s$4), -1+max(1, s$5)] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/simple_vector.cpp, instantiate_my_vector_oob_Ok, 3, BUFFER_OVERRUN_L1, [Call,Assignment,Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [42, 42] Size: [42, 42] @ codetoanalyze/cpp/bufferoverrun/simple_vector.cpp:21:23 by call `my_vector_oob_Bad()` ]
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codetoanalyze/cpp/bufferoverrun/simple_vector.cpp, my_vector_oob_Bad, 2, BUFFER_OVERRUN_L2, [Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [u$4, u$5] Size: [u$4, u$5] @ codetoanalyze/cpp/bufferoverrun/simple_vector.cpp:21:23 by call `int_vector_access_at()` ]
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codetoanalyze/cpp/bufferoverrun/std_array.cpp, normal_array_bo, 2, BUFFER_OVERRUN_L1, [ArrayDeclaration,ArrayAccess: Offset: [42, 42] Size: [42, 42]]
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codetoanalyze/cpp/bufferoverrun/std_array.cpp, std_array_bo_Bad, 2, BUFFER_OVERRUN_L1, [ArrayDeclaration,ArrayAccess: Offset: [42, 42] Size: [42, 42]]
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codetoanalyze/cpp/bufferoverrun/trivial.cpp, trivial, 2, BUFFER_OVERRUN_L1, [ArrayDeclaration,ArrayAccess: Offset: [10, 10] Size: [10, 10]]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, assert_Bad, 6, BUFFER_OVERRUN_L1, [Call,Call,Assignment,Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [6, 6] Size: [5, 5]]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, assert_Good_FP, 6, BUFFER_OVERRUN_L3, [Call,Call,Assignment,Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [4, 4] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, data_Bad, 4, BUFFER_OVERRUN_L1, [Call,Call,Assignment,Call,Call,ArrayDeclaration,Assignment,Assignment,Return,Assignment,Assignment,Return,Assignment,Assignment,ArrayAccess: Offset: [10, 10] Size: [5, 5]]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, just_test_model_FP, 16, BUFFER_OVERRUN_L5, [Call,ArrayAccess: Offset: [-oo, +oo] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, just_test_model_FP, 18, BUFFER_OVERRUN_L3, [Call,Call,Call,Assignment,Call,Call,Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [1, 1] Size: [0, +oo]]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, out_of_bound_Bad, 2, BUFFER_OVERRUN_L2, [Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [u$4, u$5] Size: [u$4, u$5]]
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[inferbo] Precise symbol instantiation
Summary:
This commit improves precision of symbol instantiations.
When a return value of a callee is `[s1 + s2, _]` and if we want to
instantiate `s1` to `c3 + max(c4, s5)`, the lower bound was
substituted to `-oo` because our domain cannot express `c3 + max(c4,
s5) + s2`.
However, we can have instantiations that are preciser than `-oo`:
(1) `c3 + c4 + s2`
(2) or `c3 + s5 + s2`
because they are smaller than the ideal instantiation, `c3 + max(c4,
s5) + s2` and it is on the lower bound position.
For now, the implementation instantiates to (1) between the two ones,
because constant values introduced by `assert` or `assume`(`if`)
command are often used as safety conditions, e.g., `assert(index >=
0);` can place before array accesses. (We can change the stratege
later if we find that it doesn't work on some other cases.)
Reviewed By: mbouaziz
Differential Revision: D7020063
fbshipit-source-id: 62fb390
7 years ago
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codetoanalyze/cpp/bufferoverrun/vector.cpp, precise_subst_Bad, 3, BUFFER_OVERRUN_L1, [ArrayDeclaration,Call,Assignment,Call,Assignment,Call,Call,Assignment,Return,ArrayAccess: Offset: [-1, -1] Size: [10, 10] @ codetoanalyze/cpp/bufferoverrun/vector.cpp:206:3 by call `access_minus_one()` ]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, precise_subst_Good_FP, 3, BUFFER_OVERRUN_L3, [ArrayDeclaration,Call,Assignment,Call,Assignment,Call,Call,Assignment,Return,ArrayAccess: Offset: [-1, 0] Size: [10, 10] @ codetoanalyze/cpp/bufferoverrun/vector.cpp:206:3 by call `access_minus_one()` ]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, push_back_Bad, 3, BUFFER_OVERRUN_L1, [Call,Call,Assignment,Call,Assignment,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [1, 1] Size: [1, 1]]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, reserve_Bad, 3, BUFFER_OVERRUN_L1, [Call,Call,Assignment,Call,Call,Call,ArrayDeclaration,Assignment,ArrayAccess: Offset: [0, 0] Size: [0, 0]]
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codetoanalyze/cpp/bufferoverrun/vector.cpp, safe_access3_Good, 2, CONDITION_ALWAYS_FALSE, []
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