conversions. Both the specification and the documentation say the
width is interpreted as the max number of wide characters to read, but
the implementation was interpreting it as the number of bytes to convert.
(See also r105317.)
This change has security implications for any applications that depend
on the buggy behavior, but the impact in practice is probably nil.
Any such application would already be buggy on other platforms that
get the semantics right. Also, these conversions are rarely used;
%ls, %lc, and %l[ are more appropriate.
reading wide characters manually. With this change, they now use
fgetwc(). To make this work, we use an internal version of fgetwc()
with a few extensions: it takes an mbstate * because non-wide streams
don't have a built-in mbstate, and it indicates the number of bytes
read.
vfscanf() now resembles vfwscanf() more closely. Minor functional
improvements include working xlocale support in vfscanf(), setting the
stream error indicator on encoding errors, and proper handling of
shift-based encodings. (Actually, making shift-based encodings work
with non-wide streams is hopeless, but the implementation now matches
the broken specification.)
This tool changes the default buffering behaviour of standard
stdio streams.
It only works on dynamic binaries. To make it work for static
ones it would require cluttering stdio because there no single
entry point.
PR: 166660
Reviewed by: current@, jhb
Approved by: kib (mentor)
MFC after: 1 week
indicates the avaliability of FILE, to prevent possible reordering of
the writes as seen by other CPUs.
Reported by: Fengwei yin <yfw.bsd gmail com>
Reviewed by: jhb
MFC after: 1 week
by separate conversion functions. This will hopefully make bugs more
noticeable (I noticed several already) and provide opportunities to
reduce code duplication.
prior to 3.0.0 release). This fixes several bugs related to memory
initialization.
Mangle __jemalloc_a0{malloc,calloc,free}() just like all the other
library-internal symbols in jemalloc, and adjust the tls allocation code
in libc to use the mangled names.
(i.e., the return value would overflow), set errno to EOVERFLOW
and return an error. This improves the chances that buggy
applications -- for instance, ones that pass in a negative integer
as the size due to a bogus calculation -- will fail in safe ways.
Returning an error in these situations is specified by POSIX, but
POSIX appears to have an off-by-one error that isn't duplicated in
this change.
Previously, some of these functions would silently cap the size at
INT_MAX+1, and others would exit with an error after writing more
than INT_MAX characters.
PR: 39256
MFC after: 2 weeks
true if the size is zero.
- Fix a claim that sprintf() is the same as snprintf() with an
infinite size. It's equivalent to snprintf() with a size of
INT_MAX + 1.
- Document the return values in the return values section.
- Document the possible errno value of EOVERFLOW.
MFC after: 2 weeks
infinite loop pretty much unconditionally. It's remarkable that the
patch that introduced the bug was never tested, but even more
remarkable that nobody noticed for over two years.
PR: 167039
MFC after: 3 days
prior to 3.0.0 release) as contrib/jemalloc, and integrate it into libc.
The code being imported by this commit diverged from
lib/libc/stdlib/malloc.c in March 2010, which means that a portion of
the jemalloc 1.0.0 ChangeLog entries are relevant, as are the entries
for all subsequent releases.
outside the range of valid file descriptors
PR: kern/164970
Submitted by: Peter Jeremy <peterjeremy@acm.org>
Reviewed by: jilles
Approved by: cperciva
MFC after: 1 week
usermode context switches (long jumps and ucontext operations). If these
are used across threads, multiple threads can end up with the same TLS base.
Madness will then result.
This makes behavior on PPC match that on x86 systems and on Linux.
MFC after: 10 days
privilege attempts to toggle SF_SETTABLE flags.
- Use the '^' operator in the SF_SNAPSHOT anti-toggling check.
Flags are now stored to ip->i_flags in one place after all checks.
Submitted by: bde
is already open in this process.
If the named semaphore is already open, sem_open() only increments a
reference count and did not take the flags into account (which otherwise
happens by passing them to open()). Add an extra check for O_CREAT|O_EXCL.
PR: kern/166706
Reviewed by: davidxu
MFC after: 10 days
quotation. Also make sure we have the same amount of columns in each row as
the number of columns we specify in the head arguments.
Reviewed by: brueffer
application destroys semaphore after sem_wait returns. Just enter
kernel to wake up sleeping threads, only update _has_waiters if
it is safe. While here, check if the value exceed SEM_VALUE_MAX and
return EOVERFLOW if this is true.
