29a6250bf0
- Allowed reporting of dead macros - Added path walking function to search for false positives in conditional statements - Updated some affected tests - Added some false positive test cases llvm-svn: 109561
66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
// RUN: %clang_cc1 -analyze -Wwrite-strings -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-experimental-checks -verify %s
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// RUN: %clang_cc1 -analyze -DUSE_BUILTINS -Wwrite-strings -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-experimental-checks -verify %s
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// RUN: %clang_cc1 -analyze -DVARIANT -Wwrite-strings -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-experimental-checks -verify %s
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// RUN: %clang_cc1 -analyze -DUSE_BUILTINS -DVARIANT -Wwrite-strings -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-experimental-checks -verify %s
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//===----------------------------------------------------------------------===
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// Declarations
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//===----------------------------------------------------------------------===
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// Some functions are so similar to each other that they follow the same code
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// path, such as memcpy and __memcpy_chk, or memcmp and bcmp. If VARIANT is
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// defined, make sure to use the variants instead to make sure they are still
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// checked by the analyzer.
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// Some functions are implemented as builtins. These should be #defined as
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// BUILTIN(f), which will prepend "__builtin_" if USE_BUILTINS is defined.
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// Functions that have variants and are also availabe as builtins should be
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// declared carefully! See memcpy() for an example.
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#ifdef USE_BUILTINS
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# define BUILTIN(f) __builtin_ ## f
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#else /* USE_BUILTINS */
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# define BUILTIN(f) f
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#endif /* USE_BUILTINS */
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typedef typeof(sizeof(int)) size_t;
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//===----------------------------------------------------------------------===
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// strlen()
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//===----------------------------------------------------------------------===
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#define strlen BUILTIN(strlen)
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size_t strlen(const char *s);
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void strlen_constant0() {
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if (strlen("123") != 3)
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(void)*(char*)0;
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}
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void strlen_constant1() {
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const char *a = "123";
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if (strlen(a) != 3)
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(void)*(char*)0;
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}
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void strlen_constant2(char x) {
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char a[] = "123";
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a[0] = x;
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if (strlen(a) != 3)
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(void)*(char*)0; // expected-warning{{null}}
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}
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size_t strlen_null() {
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return strlen(0); // expected-warning{{Null pointer argument in call to byte string function}}
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}
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size_t strlen_fn() {
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return strlen((char*)&strlen_fn); // expected-warning{{Argument to byte string function is the address of the function 'strlen_fn', which is not a null-terminated string}}
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}
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size_t strlen_nonloc() {
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label:
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return strlen((char*)&&label); // expected-warning{{Argument to byte string function is the address of the label 'label', which is not a null-terminated string}}
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}
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