diff options
Diffstat (limited to 'clang/test/Analysis/diagnostics/track_subexpressions.cpp')
| -rw-r--r-- | clang/test/Analysis/diagnostics/track_subexpressions.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/clang/test/Analysis/diagnostics/track_subexpressions.cpp b/clang/test/Analysis/diagnostics/track_subexpressions.cpp new file mode 100644 index 00000000000..e5a6b8ff115 --- /dev/null +++ b/clang/test/Analysis/diagnostics/track_subexpressions.cpp @@ -0,0 +1,19 @@ +// RUN: %clang_analyze_cc1 -x c++ -analyzer-checker=core -analyzer-output=text -verify %s + +typedef unsigned char uint8_t; + +#define UINT8_MAX 255 +#define TCP_MAXWIN 65535 + +uint8_t get_uint8_max() { + uint8_t rcvscale = UINT8_MAX; // expected-note{{'rcvscale' initialized to 255}} + return rcvscale; // expected-note{{Returning the value 255 (loaded from 'rcvscale')}} +} + +void shift_by_undefined_value() { + uint8_t shift_amount = get_uint8_max(); // expected-note{{'shift_amount' initialized to 255}} + // expected-note@-1{{Calling 'get_uint8_max'}} + // expected-note@-2{{Returning from 'get_uint8_max'}} + (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'}} + // 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'}} +} |
