forked from OSchip/llvm-project
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core %s \
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// RUN: -triple x86_64-pc-linux-gnu -verify
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#define BINOP(OP) [](auto x, auto y) { return x OP y; }
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template <typename BinOp>
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void nonloc_OP_loc(int *p, BinOp op) {
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long p_as_integer = (long)p;
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if (op(12, p_as_integer) != 11)
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return;
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// Perfectly constrain 'p', thus 'p_as_integer', and trigger a simplification
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// of the previously recorded constraint.
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if (p) {
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// no-crash
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}
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if (p == (int *)0x404) {
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// no-crash
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}
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}
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// Same as before, but the operands are swapped.
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template <typename BinOp>
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void loc_OP_nonloc(int *p, BinOp op) {
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long p_as_integer = (long)p;
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if (op(p_as_integer, 12) != 11)
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return;
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if (p) {
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// no-crash
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}
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if (p == (int *)0x404) {
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// no-crash
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}
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}
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void instantiate_tests_for_nonloc_OP_loc(int *p) {
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// Multiplicative and additive operators:
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nonloc_OP_loc(p, BINOP(*));
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nonloc_OP_loc(p, BINOP(/)); // no-crash
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nonloc_OP_loc(p, BINOP(%)); // no-crash
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nonloc_OP_loc(p, BINOP(+));
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nonloc_OP_loc(p, BINOP(-)); // no-crash
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// Bitwise operators:
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// expected-warning@+2 {{The result of the left shift is undefined due to shifting by '1028', which is greater or equal to the width of type 'int' [core.UndefinedBinaryOperatorResult]}}
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// expected-warning@+2 {{The result of the right shift is undefined due to shifting by '1028', which is greater or equal to the width of type 'int' [core.UndefinedBinaryOperatorResult]}}
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nonloc_OP_loc(p, BINOP(<<)); // no-crash
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nonloc_OP_loc(p, BINOP(>>)); // no-crash
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nonloc_OP_loc(p, BINOP(&));
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nonloc_OP_loc(p, BINOP(^));
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nonloc_OP_loc(p, BINOP(|));
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}
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void instantiate_tests_for_loc_OP_nonloc(int *p) {
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// Multiplicative and additive operators:
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loc_OP_nonloc(p, BINOP(*));
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loc_OP_nonloc(p, BINOP(/));
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loc_OP_nonloc(p, BINOP(%));
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loc_OP_nonloc(p, BINOP(+));
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loc_OP_nonloc(p, BINOP(-));
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// Bitwise operators:
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loc_OP_nonloc(p, BINOP(<<));
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loc_OP_nonloc(p, BINOP(>>));
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loc_OP_nonloc(p, BINOP(&));
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loc_OP_nonloc(p, BINOP(^));
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loc_OP_nonloc(p, BINOP(|));
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}
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// from: nullptr.cpp
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void zoo1backwards() {
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char **p = nullptr;
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// expected-warning@+1 {{Dereference of null pointer [core.NullDereference]}}
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*(0 + p) = nullptr; // warn
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**(0 + p) = 'a'; // no-warning: this should be unreachable
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}
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