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ea92b1f9d0
In gcc there exist a modifier option -Wformat-signedness that turns on additional signedness warnings in the already existing -Wformat warning. This patch implements that support in clang. This is done by adding a dummy warning diag::warn_format_conversion_argument_type_mismatch_signedness that is never emitted and only used as an option to toggle the signedness warning in -Wformat. This will ensure gcc compatibility.
223 lines
8.4 KiB
C
223 lines
8.4 KiB
C
// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -std=c11 -fsyntax-only -verify -Wformat -Wformat-signedness %s
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// RUN: %clang_cc1 -triple=x86_64-pc-win32 -std=c11 -fsyntax-only -verify -Wformat -Wformat-signedness %s
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// Verify that -Wformat-signedness alone (without -Wformat) trigger the
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// warnings. Note in gcc this will not trigger the signedness warnings as
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// -Wformat is default off in gcc.
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// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -std=c11 -fsyntax-only -verify -Wformat-signedness %s
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// RUN: %clang_cc1 -triple=x86_64-pc-win32 -std=c11 -fsyntax-only -verify -Wformat-signedness %s
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// Verify that -Wformat-signedness warnings are not reported with only -Wformat
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// (gcc compat).
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// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -std=c11 -fsyntax-only -Wformat -verify=okay %s
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// Verify that -Wformat-signedness with -Wno-format are not reported (gcc compat).
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// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -std=c11 -fsyntax-only -Wformat-signedness -Wno-format -verify=okay %s
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// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -std=c11 -fsyntax-only -Wno-format -Wformat-signedness -verify=okay %s
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// okay-no-diagnostics
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int printf(const char *restrict format, ...);
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int scanf(const char * restrict, ...);
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void test_printf_bool(_Bool x)
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{
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printf("%d", x); // no-warning
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printf("%u", x); // no-warning
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printf("%x", x); // no-warning
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}
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void test_printf_char(char x)
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{
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printf("%c", x); // no-warning
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}
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void test_printf_unsigned_char(unsigned char x)
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{
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printf("%c", x); // no-warning
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}
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void test_printf_int(int x)
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{
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printf("%d", x); // no-warning
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printf("%u", x); // expected-warning{{format specifies type 'unsigned int' but the argument has type 'int'}}
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printf("%x", x); // expected-warning{{format specifies type 'unsigned int' but the argument has type 'int'}}
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}
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void test_printf_unsigned(unsigned x)
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{
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printf("%d", x); // expected-warning{{format specifies type 'int' but the argument has type 'unsigned int'}}
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printf("%u", x); // no-warning
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printf("%x", x); // no-warning
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}
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void test_printf_long(long x)
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{
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printf("%ld", x); // no-warning
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printf("%lu", x); // expected-warning{{format specifies type 'unsigned long' but the argument has type 'long'}}
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printf("%lx", x); // expected-warning{{format specifies type 'unsigned long' but the argument has type 'long'}}
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}
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void test_printf_unsigned_long(unsigned long x)
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{
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printf("%ld", x); // expected-warning{{format specifies type 'long' but the argument has type 'unsigned long'}}
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printf("%lu", x); // no-warning
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printf("%lx", x); // no-warning
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}
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void test_printf_long_long(long long x)
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{
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printf("%lld", x); // no-warning
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printf("%llu", x); // expected-warning{{format specifies type 'unsigned long long' but the argument has type 'long long'}}
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printf("%llx", x); // expected-warning{{format specifies type 'unsigned long long' but the argument has type 'long long'}}
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}
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void test_printf_unsigned_long_long(unsigned long long x)
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{
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printf("%lld", x); // expected-warning{{format specifies type 'long long' but the argument has type 'unsigned long long'}}
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printf("%llu", x); // no-warning
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printf("%llx", x); // no-warning
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}
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enum enum_int {
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minus_1 = -1
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};
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void test_printf_enum_int(enum enum_int x)
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{
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printf("%d", x); // no-warning
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printf("%u", x); // expected-warning{{format specifies type 'unsigned int' but the argument has underlying type 'int'}}
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printf("%x", x); // expected-warning{{format specifies type 'unsigned int' but the argument has underlying type 'int'}}
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}
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#ifndef _WIN32 // Disabled due to enums have different underlying type on _WIN32
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enum enum_unsigned {
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zero = 0
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};
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void test_printf_enum_unsigned(enum enum_unsigned x)
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{
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printf("%d", x); // expected-warning{{format specifies type 'int' but the argument has underlying type 'unsigned int'}}
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printf("%u", x); // no-warning
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printf("%x", x); // no-warning
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}
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enum enum_long {
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minus_one = -1,
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int_val = __INT_MAX__, // INT_MAX
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unsigned_val = (unsigned)(-__INT_MAX__ -1) // (unsigned)INT_MIN
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};
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void test_printf_enum_long(enum enum_long x)
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{
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printf("%ld", x); // no-warning
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printf("%lu", x); // expected-warning{{format specifies type 'unsigned long' but the argument has underlying type 'long'}}
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printf("%lx", x); // expected-warning{{format specifies type 'unsigned long' but the argument has underlying type 'long'}}
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}
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enum enum_unsigned_long {
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uint_max_plus = (unsigned long)(__INT_MAX__ *2U +1U)+1, // (unsigned long)UINT_MAX+1
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};
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void test_printf_enum_unsigned_long(enum enum_unsigned_long x)
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{
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printf("%ld", x); // expected-warning{{format specifies type 'long' but the argument has underlying type 'unsigned long'}}
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printf("%lu", x); // no-warning
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printf("%lx", x); // no-warning
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}
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#endif
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void test_scanf_char(char *y) {
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scanf("%c", y); // no-warning
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}
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void test_scanf_unsigned_char(unsigned char *y) {
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scanf("%c", y); // no-warning
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}
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void test_scanf_int(int *x) {
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scanf("%d", x); // no-warning
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scanf("%u", x); // expected-warning{{format specifies type 'unsigned int *' but the argument has type 'int *'}}
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scanf("%x", x); // expected-warning{{format specifies type 'unsigned int *' but the argument has type 'int *'}}
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}
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void test_scanf_unsigned(unsigned *x) {
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scanf("%d", x); // expected-warning{{format specifies type 'int *' but the argument has type 'unsigned int *'}}
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scanf("%u", x); // no-warning
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scanf("%x", x); // no-warning
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}
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void test_scanf_long(long *x) {
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scanf("%ld", x); // no-warning
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scanf("%lu", x); // expected-warning{{format specifies type 'unsigned long *' but the argument has type 'long *'}}
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scanf("%lx", x); // expected-warning{{format specifies type 'unsigned long *' but the argument has type 'long *'}}
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}
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void test_scanf_unsigned_long(unsigned long *x) {
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scanf("%ld", x); // expected-warning{{format specifies type 'long *' but the argument has type 'unsigned long *'}}
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scanf("%lu", x); // no-warning
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scanf("%lx", x); // no-warning
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}
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void test_scanf_longlong(long long *x) {
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scanf("%lld", x); // no-warning
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scanf("%llu", x); // expected-warning{{format specifies type 'unsigned long long *' but the argument has type 'long long *'}}
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scanf("%llx", x); // expected-warning{{format specifies type 'unsigned long long *' but the argument has type 'long long *'}}
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}
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void test_scanf_unsigned_longlong(unsigned long long *x) {
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scanf("%lld", x); // expected-warning{{format specifies type 'long long *' but the argument has type 'unsigned long long *'}}
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scanf("%llu", x); // no-warning
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scanf("%llx", x); // no-warning
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}
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void test_scanf_enum_int(enum enum_int *x) {
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scanf("%d", x); // no-warning
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scanf("%u", x); // expected-warning{{format specifies type 'unsigned int *' but the argument has type 'enum enum_int *'}}
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scanf("%x", x); // expected-warning{{format specifies type 'unsigned int *' but the argument has type 'enum enum_int *'}}
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}
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#ifndef _WIN32 // Disabled due to enums have different underlying type on _WIN32
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void test_scanf_enum_unsigned(enum enum_unsigned *x) {
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scanf("%d", x); // expected-warning{{format specifies type 'int *' but the argument has type 'enum enum_unsigned *'}}
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scanf("%u", x); // no-warning
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scanf("%x", x); // no-warning
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}
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void test_scanf_enum_long(enum enum_long *x) {
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scanf("%ld", x); // no-warning
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scanf("%lu", x); // expected-warning{{format specifies type 'unsigned long *' but the argument has type 'enum enum_long *'}}
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scanf("%lx", x); // expected-warning{{format specifies type 'unsigned long *' but the argument has type 'enum enum_long *'}}
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}
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void test_scanf_enum_unsigned_long(enum enum_unsigned_long *x) {
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scanf("%ld", x); // expected-warning{{format specifies type 'long *' but the argument has type 'enum enum_unsigned_long *'}}
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scanf("%lu", x); // no-warning
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scanf("%lx", x); // no-warning
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}
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#endif
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// Verify that we get no warnings from <inttypes.h>
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typedef short int int16_t;
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typedef unsigned short int uint16_t;
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void test_printf_priX16(int16_t x) {
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printf("PRId16: %" "d" /*PRId16*/ "\n", x); // no-warning
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printf("PRIi16: %" "i" /*PRIi16*/ "\n", x); // no-warning
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}
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void test_printf_unsigned_priX16(uint16_t x) {
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printf("PRIo16: %" "o" /*PRIo16*/ "\n", x); // no-warning
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printf("PRIu16: %" "u" /*PRIu16*/ "\n", x); // no-warning
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printf("PRIx16: %" "x" /*PRIx16*/ "\n", x); // no-warning
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printf("PRIX16: %" "X" /*PRIX16*/ "\n", x); // no-warning
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}
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// Verify that we can suppress a -Wformat-signedness warning by ignoring
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// -Wformat (gcc compat).
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void test_suppress(int x)
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{
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#pragma GCC diagnostic ignored "-Wformat"
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printf("%u", x);
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}
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