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Use "diagnose_if" attribute for clang

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Before this patch, clang shows many "division by zero is undefined" errors
if a files has syntax error.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63943 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse 2018-07-10 16:10:57 +00:00
parent fdd7f57b97
commit 4b2f2225e4
1 changed files with 24 additions and 11 deletions
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35
include/ruby/ruby.h
View file

@ -2210,8 +2210,13 @@ ERRORFUNC(("variable argument length doesn't match"), int rb_scan_args_length_mi
# define rb_scan_args_isdigit(c) ((unsigned char)((c)-'0')<10)
# define rb_scan_args_count_end(fmt, ofs, varc, vari) \
((vari)/(!fmt[ofs] || rb_scan_args_bad_format(fmt)))
# if defined(__has_attribute) && __has_attribute(diagnose_if)
# define rb_scan_args_count_end(fmt, ofs, varc, vari) \
(fmt[ofs] ? rb_scan_args_bad_format(fmt) : (vari))
# else
# define rb_scan_args_count_end(fmt, ofs, varc, vari) \
((vari)/(!fmt[ofs] || rb_scan_args_bad_format(fmt)))
# endif
# define rb_scan_args_count_block(fmt, ofs, varc, vari) \
(fmt[ofs]!='&' ? \
@ -2239,16 +2244,17 @@ ERRORFUNC(("variable argument length doesn't match"), int rb_scan_args_length_mi
rb_scan_args_count_var(fmt, ofs+1, varc, vari+fmt[ofs]-'0'))
# define rb_scan_args_count(fmt, varc) \
((!rb_scan_args_isdigit(fmt[0]) ? \
(!rb_scan_args_isdigit(fmt[0]) ? \
rb_scan_args_count_var(fmt, 0, varc, 0) : \
rb_scan_args_count_opt(fmt, 1, varc, fmt[0]-'0')) \
== (varc) || \
rb_scan_args_length_mismatch(fmt, varc))
rb_scan_args_count_opt(fmt, 1, varc, fmt[0]-'0'))
# define rb_scan_args_verify_count(fmt, varc) \
((varc)/(rb_scan_args_count(fmt, varc)))
((varc)/(rb_scan_args_count(fmt, varc) == (varc) || \
rb_scan_args_length_mismatch(fmt, varc)))
# ifdef __GNUC__
# if defined(__has_attribute) && __has_attribute(diagnose_if)
# define rb_scan_args_verify(fmt, varc) 0
# elif defined(__GNUC__)
# define rb_scan_args_verify(fmt, varc) \
__extension__ ({ \
int verify; \
@ -2361,6 +2367,8 @@ rb_scan_args_end_idx(const char *fmt)
}
# endif
/* NOTE: Use `char *fmt` instead of `const char *fmt` because of clang's bug*/
/* https://bugs.llvm.org/show_bug.cgi?id=38095 */
# define rb_scan_args0(argc, argv, fmt, varc, vars) \
rb_scan_args_set(argc, argv, \
rb_scan_args_n_lead(fmt), \
@ -2369,17 +2377,22 @@ rb_scan_args_end_idx(const char *fmt)
rb_scan_args_f_var(fmt), \
rb_scan_args_f_hash(fmt), \
rb_scan_args_f_block(fmt), \
(rb_scan_args_verify(fmt, varc), vars))
(rb_scan_args_verify(fmt, varc), vars), (char *)fmt, varc)
ALWAYS_INLINE(static int
rb_scan_args_set(int argc, const VALUE *argv,
int n_lead, int n_opt, int n_trail,
int f_var, int f_hash, int f_block,
VALUE *vars[]));
VALUE *vars[], char *fmt, int varc));
inline int
rb_scan_args_set(int argc, const VALUE *argv,
int n_lead, int n_opt, int n_trail,
int f_var, int f_hash, int f_block,
VALUE *vars[])
VALUE *vars[], RB_UNUSED_VAR(char *fmt), RB_UNUSED_VAR(int varc))
# if defined(__has_attribute) && __has_attribute(diagnose_if)
__attribute__((diagnose_if(rb_scan_args_count(fmt,varc)==0,"bad scan arg format","error")))
__attribute__((diagnose_if(rb_scan_args_count(fmt,varc)!=varc,"variable argument length doesn't match","error")))
# endif
{
int i, argi = 0, vari = 0, last_idx = -1;
VALUE *var, hash = Qnil, last_hash = 0;