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Fix va_end() definition: must be an expression of type void

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Also added a test yielding a failure with the previous definition,
i.e. when using: (va_end(ap));

The test also checks potentially incorrect va_start() definition.
This commit is contained in:
Vincent Lefevre 2019-03-14 15:39:52 +01:00
parent 920f773a81
commit be7c870718
2 changed files with 19 additions and 5 deletions
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10
include/stdarg.h
View File

@ -25,7 +25,7 @@ void *__va_arg(__va_list_struct *ap, int arg_type, int size, int align);
#define va_arg(ap, type) \
(*(type *)(__va_arg(ap, __builtin_va_arg_types(type), sizeof(type), __alignof__(type))))
#define va_copy(dest, src) (*(dest) = *(src))
#define va_end(ap)
#define va_end(ap) ((void)0)
/* avoid conflicting definition for va_list on Macs. */
#define _VA_LIST_T
@ -36,7 +36,7 @@ typedef char *va_list;
#define va_arg(ap, t) ((sizeof(t) > 8 || (sizeof(t) & (sizeof(t) - 1))) \
? **(t **)((ap += 8) - 8) : *(t *)((ap += 8) - 8))
#define va_copy(dest, src) ((dest) = (src))
#define va_end(ap)
#define va_end(ap) ((void)0)
#endif
#elif __arm__
@ -48,7 +48,7 @@ typedef char *va_list;
#define va_arg(ap,type) (ap = (void *) ((_tcc_align(ap,type)+sizeof(type)+3) \
&~3), *(type *)(ap - ((sizeof(type)+3)&~3)))
#define va_copy(dest, src) (dest) = (src)
#define va_end(ap)
#define va_end(ap) ((void)0)
#elif defined(__aarch64__)
typedef struct {
@ -60,7 +60,7 @@ typedef struct {
} va_list;
#define va_start(ap, last) __va_start(ap, last)
#define va_arg(ap, type) __va_arg(ap, type)
#define va_end(ap)
#define va_end(ap) ((void)0)
#define va_copy(dest, src) ((dest) = (src))
#else /* __i386__ */
@ -69,7 +69,7 @@ typedef char *va_list;
#define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
#define va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))
#define va_copy(dest, src) (dest) = (src)
#define va_end(ap)
#define va_end(ap) ((void)0)
#endif
/* fix a buggy dependency on GCC in libio.h */

14
tests/tcctest.c
View File

@ -2622,6 +2622,19 @@ void stdarg_for_libc(const char *fmt, ...)
va_end(args);
}
void stdarg_syntax(int n, ...)
{
int i;
va_list ap;
if (1)
va_start(ap, n);
else
;
i = va_arg(ap, int);
printf("stdarg_void_expr: %d\n", i);
(va_end(ap));
}
void stdarg_test(void)
{
LONG_DOUBLE ld = 1234567891234LL;
@ -2669,6 +2682,7 @@ void stdarg_test(void)
bob.profile = 42;
stdarg_for_struct(bob, bob, bob, bob.profile);
stdarg_for_libc("stdarg_for_libc: %s %.2f %d\n", "string", 1.23, 456);
stdarg_syntax(1, 17);
}
void whitespace_test(void)