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| author | Paul Eggert <eggert@cs.ucla.edu> | 2021-09-21 07:47:45 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2021-09-21 08:00:44 -0700 |
| commit | 0b5ca7c3e551e5502f3be3b06453324fe8604e82 (patch) | |
| tree | 0c46027d9aee6c5d533cabb0c3fcb7895197d178 /misc/sys/cdefs.h | |
| parent | f3e664563361dc17530113b3205998d1f19dc4d9 (diff) | |
| download | glibc-0b5ca7c3e551e5502f3be3b06453324fe8604e82.tar.gz glibc-0b5ca7c3e551e5502f3be3b06453324fe8604e82.tar.xz glibc-0b5ca7c3e551e5502f3be3b06453324fe8604e82.zip | |
regex: copy back from Gnulib
Copy regex-related files back from Gnulib, to fix a problem with static checking of regex calls noted by Martin Sebor. This merges the following changes: * New macro __attribute_nonnull__ in misc/sys/cdefs.h, for use later when copying other files back from Gnulib. * Use __GNULIB_CDEFS instead of __GLIBC__ when deciding whether to include bits/wordsize.h etc. * Avoid duplicate entries in epsilon closure table. * New regex.h macro _REGEX_NELTS to let regexec say that its pmatch arg should contain nmatch elts. Use that for regexec, instead of __attr_access (which is incorrect). * New regex.h macro _Attr_access_ which is like __attr_access except portable to non-glibc platforms. * Add some DEBUG_ASSERTs to pacify gcc -fanalyzer and to catch recently-fixed performance bugs if they recur. * Add Gnulib-specific stuff to port the dynarray- and lock-using parts of regex code to non-glibc platforms. * Fix glibc bug 11053. * Avoid some undefined behavior when popping an empty fail stack.
Diffstat (limited to 'misc/sys/cdefs.h')
| -rw-r--r-- | misc/sys/cdefs.h | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h index e490fc1aeb..4dac9d264d 100644 --- a/misc/sys/cdefs.h +++ b/misc/sys/cdefs.h @@ -318,16 +318,18 @@ #endif /* The nonnull function attribute marks pointer parameters that - must not be NULL. */ -#ifndef __nonnull + must not be NULL. This has the name __nonnull in glibc, + and __attribute_nonnull__ in files shared with Gnulib to avoid + collision with a different __nonnull in DragonFlyBSD 5.9. */ +#ifndef __attribute_nonnull__ # if __GNUC_PREREQ (3,3) || __glibc_has_attribute (__nonnull__) -# define __nonnull(params) __attribute__ ((__nonnull__ params)) +# define __attribute_nonnull__(params) __attribute__ ((__nonnull__ params)) # else -# define __nonnull(params) +# define __attribute_nonnull__(params) # endif -#elif !defined __GLIBC__ -# undef __nonnull -# define __nonnull(params) _GL_ATTRIBUTE_NONNULL (params) +#endif +#ifndef __nonnull +# define __nonnull(params) __attribute_nonnull__ (params) #endif /* The returns_nonnull function attribute marks the return type of the function @@ -493,9 +495,9 @@ [!!sizeof (struct { int __error_if_negative: (expr) ? 2 : -1; })] #endif -/* The #ifndef lets Gnulib avoid including these on non-glibc - platforms, where the includes typically do not exist. */ -#ifdef __GLIBC__ +/* Gnulib avoids including these, as they don't work on non-glibc or + older glibc platforms. */ +#ifndef __GNULIB_CDEFS # include <bits/wordsize.h> # include <bits/long-double.h> #endif |