forked from OSchip/llvm-project
20 lines
1.0 KiB
C++
20 lines
1.0 KiB
C++
// RUN: %clang_analyze_cc1 -x c++ -analyzer-checker=core -analyzer-output=text -verify %s
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typedef unsigned char uint8_t;
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#define UINT8_MAX 255
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#define TCP_MAXWIN 65535
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uint8_t get_uint8_max() {
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uint8_t rcvscale = UINT8_MAX; // expected-note{{'rcvscale' initialized to 255}}
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return rcvscale; // expected-note{{Returning the value 255 (loaded from 'rcvscale')}}
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}
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void shift_by_undefined_value() {
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uint8_t shift_amount = get_uint8_max(); // expected-note{{'shift_amount' initialized to 255}}
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// expected-note@-1{{Calling 'get_uint8_max'}}
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// expected-note@-2{{Returning from 'get_uint8_max'}}
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(void)(TCP_MAXWIN << shift_amount); // expected-warning{{The result of the left shift is undefined due to shifting by '255', which is greater or equal to the width of type 'int'}}
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// expected-note@-1{{The result of the left shift is undefined due to shifting by '255', which is greater or equal to the width of type 'int'}}
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}
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