Match glibc behaviour to expose the public bswap_* macros only with an
explicity #include <byteswap.h>; #include'ing <endian.h> should not expose
them.
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
Don't set SO_RCVBUF/SO_SNDBUF to fixed values, thus disabling autotuning.
Patch modeled after a patch suggestion from Daniel Havey <dhavey@gmail.com>
in https://cygwin.com/ml/cygwin-patches/2017-q1/msg00010.html:
At Windows we love what you are doing with Cygwin. However, we have
been getting reports from our hardware vendors that iperf is slow on
Windows. Iperf is of course compiled against the cygwin1.dll and we
believe we have traced the problem down to the function fdsock in
net.cc. SO_RCVBUF and SO_SNDBUF are being manually set. The comments
indicate that the idea was to increase the buffer size, but, this code
must have been written long ago because Windows has used autotuning
for a very long time now. Please do not manually set SO_RCVBUF or
SO_SNDBUF as this will limit your internet speed.
I am providing a patch, an STC and my cygcheck -svr output. Hope we
can fix this. Please let me know if I can help further.
Simple Test Case:
I have a script that pings 4 times and then iperfs for 10 seconds to
debit.k-net.fr
With patch
$ bash buffer_test.sh 178.250.209.22
usage: bash buffer_test.sh <iperf server name>
Pinging 178.250.209.22 with 32 bytes of data:
Reply from 178.250.209.22: bytes=32 time=167ms TTL=34
Reply from 178.250.209.22: bytes=32 time=173ms TTL=34
Reply from 178.250.209.22: bytes=32 time=173ms TTL=34
Reply from 178.250.209.22: bytes=32 time=169ms TTL=34
Ping statistics for 178.250.209.22:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 167ms, Maximum = 173ms, Average = 170ms
------------------------------------------------------------
Client connecting to 178.250.209.22, TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.137.196.108 port 58512 connected with 178.250.209.22 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 768 KBytes 6.29 Mbits/sec
[ 3] 1.0- 2.0 sec 9.25 MBytes 77.6 Mbits/sec
[ 3] 2.0- 3.0 sec 18.0 MBytes 151 Mbits/sec
[ 3] 3.0- 4.0 sec 18.0 MBytes 151 Mbits/sec
[ 3] 4.0- 5.0 sec 18.0 MBytes 151 Mbits/sec
[ 3] 5.0- 6.0 sec 18.0 MBytes 151 Mbits/sec
[ 3] 6.0- 7.0 sec 18.0 MBytes 151 Mbits/sec
[ 3] 7.0- 8.0 sec 18.0 MBytes 151 Mbits/sec
[ 3] 8.0- 9.0 sec 18.0 MBytes 151 Mbits/sec
[ 3] 9.0-10.0 sec 18.0 MBytes 151 Mbits/sec
[ 3] 0.0-10.0 sec 154 MBytes 129 Mbits/sec
Without patch:
dahavey@DMH-DESKTOP ~
$ bash buffer_test.sh 178.250.209.22
Pinging 178.250.209.22 with 32 bytes of data:
Reply from 178.250.209.22: bytes=32 time=168ms TTL=34
Reply from 178.250.209.22: bytes=32 time=167ms TTL=34
Reply from 178.250.209.22: bytes=32 time=170ms TTL=34
Reply from 178.250.209.22: bytes=32 time=169ms TTL=34
Ping statistics for 178.250.209.22:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 167ms, Maximum = 170ms, Average = 168ms
------------------------------------------------------------
Client connecting to 178.250.209.22, TCP port 5001
TCP window size: 208 KByte (default)
------------------------------------------------------------
[ 3] local 10.137.196.108 port 58443 connected with 178.250.209.22 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 512 KBytes 4.19 Mbits/sec
[ 3] 1.0- 2.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 2.0- 3.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 3.0- 4.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 4.0- 5.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 5.0- 6.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 6.0- 7.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 7.0- 8.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 8.0- 9.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 9.0-10.0 sec 1.50 MBytes 12.6 Mbits/sec
[ 3] 0.0-10.1 sec 14.1 MBytes 11.7 Mbits/sec
The output shows that the RTT from my machine to the iperf server is
similar in both cases (about 170ms) however with the patch the
throughput averages 129 Mbps while without the patch the throughput
only averages 11.7 Mbps. If we calculate the maximum throughput using
Bandwidth = Queue/RTT we get (212992 * 8)/0.170 = 10.0231 Mbps. This
is just about what iperf is showing us without the patch since the
buffer size is set to 212992 I believe that the buffer size is
limiting the throughput. With the patch we have no buffer limitation
(autotuning) and can develop the full potential bandwidth on the link.
If you want to duplicate the STC you will have to find an iperf server
(I found an extreme case) that has a large enough RTT distance from
you and try a few times. I get varying results depending on Internet
traffic but without the patch never exceed the limit caused by the
buffering.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The termios code doesn't handle erasing of multibyte characters
in canonical mode, it always erases a single byte. When entering
a multibyte character and then pressing VERASE, the input ends up
with an invalid character.
Following Linux we introduce the IUTF8 input flag now, set by
default. When this flag is set, VERASE or VWERASE will check
if the just erased input byte is a UTF-8 continuation byte. If
so, it erases another byte and checks again until the entire
UTF-8 character has been removed from the input buffer.
Note that this (just as on Linux) does NOT work with arbitrary
multibyte codesets. This only works with UTF-8.
For a discussion what happens, see
https://cygwin.com/ml/cygwin/2017-01/msg00299.html
Sidenote: The eat_readahead function is now member of fhandler_termios,
not fhandler_base. That's necessary to get access to the terminal's
termios flags.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
- Drop virtual_key_code (only used once)
- Convert macros wch and control_key_state to const vars
unicode_char and ctrl_key_state.
- Fix formatting
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Create two new inline functions is_alt_numpad_key(PINPUT_RECORD) and
is_alt_numpad_event(PINPUT_RECORD) which contain the actual checks.
Call these functions from fhandler_console::read and peek_console for
better readability.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
{p}select/{p}poll completely ignored Alt+Numpad key sequences in console
input which results in newer readline using pselect to fail handling such
sequences correctly. See https://cygwin.com/ml/cygwin/2017-01/msg00135.html
During debugging and testing it turned out that while reading console
input, single key presses during an Alt+Numpad sequences where not
ignored, so ultimately a sequence like
Alt-down Numpad-1 Numpad-2 Numpad-3
whihc is supposed to result in a single character in the input stream
will actually result in 4 chars in the input stream, three control
sequences and the actual character.
Both problems should be fixed by this patch.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This patch fixes the following problem:
Commit 9636c426 refactored the pipe code especially to make sure
to call WriteFile only with chunks matching the maximum atomic write
count. This accidentally introduced a small change in behaviour
on blocking pipes due to the success case falling through into the
error case. Rather then writing atomic chunks until all bytes are
written, the code immediately broke from the loop after writing
the first chunk, basically the same as in case of non-blocking
writes. This behaviour is not compliant to POSIX which requires
"Write requests to a pipe or FIFO [...]
* If the O_NONBLOCK flag is clear, a write request may cause the
thread to block, but on normal completion it shall return nbyte."
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
If newfile already exists and is in use, trying to overwrite it with
NtSetInformationFile(FileRenameInformation) fails exactly as if we
don't have the permissions to delete it. Unfortunately the return code
is the same STATUS_ACCESS_DENIED, so we have no way to distinguish
these cases. What we do here so far is to start a transaction to delete
newfile. If this open fails with a transactional error we stop the
transaction and retry opening the file without transaction.
But, here's the problem: If newfile is in use, NtOpenFile(oldfile)
naturally does NOT fail with a transactional error. Rather, the
subsequent call to unlink_nt(newfile) does, because there's another
handle open to newfile outside a transaction. However, the code does
not check if unlink_nt fails with a transactional error and so fails
to retry without transaction.
This patch recifies the problem and checks unlink_nt's status as well.
Refactor code to get rid of goto into another code block.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
A *very* recent Windows build adds more code to the preamble of
RtlGetCurrentDirectory_U() so that the previous heuristic failed to find
the call to the locking routine.
This only affects the 64-bit version of ntdll, where the 0xe8 byte is
now found at offset 40, not the 32-bit version. However, let's just
double the area we search for said byte for good measure.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Returns the process's environment concatenated into a single block of
null-terminated strings, along with the length of the environment block.
Adds an associated PICOM_ENVIRON commune_process handler.
win32env_to_cygwenv handles converting wchar to char and some other
minor taks. Optionally it handles converting any paths in variables to
posix paths.
This will be useful for implementing /proc/<pid>/environ
commit 67fd2101 introduced a bad bug. Changing sys_privs to a static
area and just returning a pointer is nice... *if* the calling code doesn't
call free() on it. Make sure callers check pointer for sys_privs and
refrain from calling free, if so.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Include ntsecapi.h where required and just redefine RtlGenRandom
correctly in the ntsecapi.h wrapper.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
In preparation of exporting getentropy/getrandom to userspace, rearrange
code a bit:
- Define RtlGenRandom in ntdll.h.
- Drop calls to getentropy in favor of RtlGenRandom (fhandler_socket,
fhandler_dev_random).
- Add try/except blocks in fhandler_dev_random to return EFAULT rather
than crashing if buffer pointer is invalid.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
NtOpenFile/NtCreateFile on non-existent paths on network drives has a
bug. Assuming a path Z:\dir\file. Further assuming that Z:\dir does
not exist.
The first NtOpenFile("Z:\dir\file") correctly returns
STATUS_OBJECT_PATH_NOT_FOUND. Subsequent calls incorrectly
return STATUS_OBJECT_NAME_NOT_FOUND.
This appears to be some kind of caching behaviour. Waiting a while
before repeating the call correctly returns STATUS_OBJECT_PATH_NOT_FOUND
again.
This patch works around the observed misbehaviour.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far, when converting from POSIX to Windows notation, cygwin_conv_path
fails to check for .exe suffix, so /path/foo did not return /path/foo.exe
even if this file exists.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The original code only skipped the "./", but missed to test if more
trailing slashes are present. This in turn leads to invalid conversion.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Don't allow signal 0 in signal(2), sigaction(2), siginterrupt(3).
Don't allow any signal in sigqueue(3) but explicitely handle
signal 0 as in kill(2).
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Provide <memory.h> for all standard Newlib targets and remove
Cygwin-specific header. Most POSIX like systems provide this historic
header.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This makes it possible provide operating system specific types for
<pthread.h>. It is in line with the FreeBSD header file structure and
allows a future cleanup of <pthread.h> to not expose unrelated things
via <sys/types.h> and <unistd.h>. Glibc uses the similar
<bits/pthreadtypes.h> for this purpose.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Update the getconf utility to support the new flag as well as
_PC_POSIX_PERMISSIONS and _PC_POSIX_SECURITY. These were previously
unsupported, probably as an oversight.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Additionally to eccefd97, we need to ensure the exception handler is
installed for the _ljfault used to implement _try/_except to get called.
Also use the correct macro for x86 conditional compilation.
Addresses https://cygwin.com/ml/cygwin/2016-09/msg00143.html
Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
Long-standing problem in one of the corner cases of rename(2):
If we rename a directory a check is performed to see if newpath is
identical to oldpath or a subdir of oldpath. This check is
(accidentally? no hints anywhere in ChangeLogs or code) performed
case-insensitive for as long as we use Unicode paths and NT functions.
This leads to the problems described in
https://cygwin.com/ml/cygwin/2016-09/msg00264.html
Change this to be conditional case-sensitive as all other checks but
let's take this with a grain of salt. There may be corner-cases in
this corner-case which require to chek parts of the path always
case-insensitive. Off the top of my head I can't construct such a
case but that's no proof they don't exist :}
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit d16a5630 dropped usage of cygheap's locale functions
in favor of local on-the-fly usage of UTF-8 instead of ASCII.
This allowed to use the current local rather than a fixed
system-wide locale set at startup time. d16a5630 just missed
to add the ASCII->UTF-8 conversion in the console as well.
Fixes https://cygwin.com/ml/cygwin/2016-10/msg00000.html
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
On 09/02/2016 11:03 AM, Corinna Vinschen wrote:
> On Sep 2 10:46, Michael Haubenwallner wrote:
>> On 09/01/2016 03:32 PM, Corinna Vinschen wrote:
>>> You could just use the global variable program_invocation_name. If in
>>> doubt, use the Windows path global_progname and convert it to full POSIX
>>> via cygwin_conv_path.
>>
>> Patch updated, using global_progname now.
>
> Looks good and you're right to do it this way since I just noticed
> that program_invocation_name may return a relative pathname.
Yep.
> Btw., in other calls which require the full POSIX path we use
> mount_table->conv_to_posix_path instead of cygwin_conv_path (see
> e. g. fillout_pinfo()). It's a bit faster. Maybe something for a
> followup patch.
No problem - attached.
This renders the original patch 4/4 valid again.
> Note for some later improvement: I really wonder why we don't store
> the absolute POSIX path of the current executable globally yet...
Same here.
Thanks!
/haubi/
>From f7255edd33cb4abe34f27188aab8dccdfa5dd2a0 Mon Sep 17 00:00:00 2001
From: Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com>
Date: Wed, 31 Aug 2016 18:05:11 +0200
Subject: [PATCH 3/4] dlopen: on x/lib search x/bin if exe is in x/bin
citing https://cygwin.com/ml/cygwin-developers/2016-08/msg00020.html
> Consider the file /usr/bin/cygz.dll:
> - dlopen (libz.so) success
> - dlopen (/usr/bin/libz.so) success
> - dlopen (/usr/lib/libz.so) fails
* dlfcn.c (dlopen): For dlopen("x/lib/N"), when the application
executable is in "x/bin/", search for "x/bin/N" before "x/lib/N".
Rather than searching all search dirs per one basename,
search for all basenames within per one search dir.
pathfinder.h (check_path_access): Interchange dir- and basename-loops.
Instead of find_exec, without changing behaviour use new pathfinder
class with new allocator_interface around tmp_pathbuf and new vstrlist
class.
* pathfinder.h (pathfinder): New file.
* vstrlist.h (allocator_interface, allocated_type, vstrlist): New file.
* dlfcn.cc (dlopen): Avoid redundant GetModuleHandleExW with RTLD_NOLOAD
and RTLD_NODELETE. Switch to new pathfinder class, using
(tmp_pathbuf_allocator): New class.
(get_full_path_of_dll): Drop.
On Windows 8.1 and later, the NetUserChangePassword call apparently
doesn't accept the usual "\\server" string anymore, but requires to
use the "domain" instead, otherwise it emits en error code 1265,
ERROR_DOWNGRADE_DETECTED. Since this is accepted by pre-8.1 as well,
use the domain indiscriminately when calling NetUserChangePassword
from passwd(1).
While at it, do some minor cleanup in passwd.c.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Keep __ctype_ptr__ available on Cygwin only, for backward compatibility
with existing apps referencing it via the ctype macros.
Otherwise initialize __global_locale.ctype_ptr and __C_locale.ctype_ptr
and use them throughout.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Wrap SetThreadName()'s call to RaiseException() in __try/__except/__endtry,
so that if the attached debugger doesn't know about MS_VC_EXCEPTION (e.g.
current gdb and probably strace as well) and continues exception processing,
we ignore it, rather than dying due an unhandled exception.
Also remove an unnecessary cast in the RaiseException() invocation.
Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
GDB since commit 24cdb46e [1] can report and use these names.
Add utility function SetThreadName(), which sends a thread name to the
debugger.
Use that:
- to set the default thread name for main thread and newly created pthreads.
- in pthread_setname_np() for user thread names.
- for helper thread names in cygthread::create()
- for helper threads which are created directly with CreateThread.
Note that there can still be anonymous threads, created by system or
injected DLLs.
[1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=24cdb46e9f0a694b4fbc11085e094857f08c0419
This patch adds pthread_getname_np and pthread_setname_np.
These were added to glibc in 2.12[1] and are also present in some form on
NetBSD and several UNIXes.
The code is based on NetBSD's implementation with changes to better match
Linux behaviour.
Implementation quirks:
* pthread_setname_np with a NULL pointer segfaults (as linux)
* pthread_setname_np returns ERANGE for names longer than 16 characters (as
linux)
* pthread_getname_np with a NULL pointer returns EFAULT (as linux)
* pthread_getname_np with a buffer length of less than 16 returns ERANGE (as
linux)
* pthread_getname_np truncates the thread name to fit the buffer length.
This guarantees success even when the default thread name is longer than 16
characters, but means there is no way to discover the actual length of the
thread name. (Linux always truncates the thread name to 16 characters)
* Changing program_invocation_short_name changes the default thread name (on
linux, it has no effect on the default thread name)
I'll leave it up to you to decide if any of these matter.
This is implemented via class pthread_attr to make it easier to add
pthread_attr_[gs]etname_np (present in NetBSD and some UNIXes) should it
ever be added to Linux (or we decide we want it anyway).
[1] https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS
This routine makes a call to fabs instead of fabsl(), causing truncation.
Clang complains (warning: absolute value function 'fabs' given an argument of type 'long double' but has parameter of type 'double' which may cause truncation of value).
Signed-off-by: David Wohlferd <dw@LimeGreenSocks.com>
The R language has some hacks specifically for mingw-w64 that
were caused by our handling of NaNs in sqrt(x). R uses a
special valued NaN to mean 'Not Available' and expects it to
be retained through various calculations. Our sqrt(x) doesn't
do this, instead it normalises such a NaN (retaining sign).
From:
http://wwwf.imperial.ac.uk/~drmii/M3SC_2016/IEEE_2008_4610935.pdf
"6.2.3 NaN propagation
An operation that propagates a NaN operand to its result and
has a single NaN as an input should produce a NaN with the
payload of the input NaN if representable in the destination
format."
There might even be a slight speed-up from this too.
Thanks to Duncan Murdoch for finding the reference.
Change nl_langinfo to nl_langinfo_l using locale given as argument.
Remove outdated TRANSITION_PERIOD_HACK. The codeset is stored in
the locale for quite some time now. For !MB_CAPABLE targets, just
return "US_ASCII" as codeset.
Implement nl_langinfo by calling nl_langinfo_l. Export nl_langinfo_l
from Cygwin DLL and bump minor API version number.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The former __locale_charset always fetched the current locale's charset.
We need the per-locale charset, too, in future. Rename __locale_charset
to __current_locale_charset and change __locale_charset to take a
locale_t as parameter. Accommodate througout.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit 6f3943b erroneously removed the `#ifdef _COMPILING_NEWLIB'
guarding the __getreent inline function. This patch ignored the
fact that config.h is included when building applications, and the
code in question requires internal, auto-generated headers to be
available which are not exposed to user-space.
Reinstantiate defined(_COMPILING_NEWLIB) test and alternatively
check for defined (__INSIDE_CYGWIN__), otherwise we'd have to
reinstantiate the __getreent macro in cygtls.h which is really
confusing.
While testing it turned out that a low number of source codes inside
Cygwin won't see the inline __getreent due to a missing __INSIDE_CYGWIN__
definition. For malloc.cc this was actually deliberate to get different
definitions from including cygmalloc.h. Change this by defining
__INSIDE_CYGWIN__ in malloc.cc but changing the test in cygmalloc.h
to test for defined(DLMALLOC_VERSION). This might need a change if we
ever get around to replace dlmalloc with a newer, more threading-aware
malloc implementation.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit 97d0449 left a bit to be desired. First, the fact that any
new-style ACL couldn't be "standard ACL" anymore was very much over
the top. On one hand Admins and SYSTEM ACEs are not supposed to be
masked, but on the other hand we *must* create the CLASS_OBJ
because otherwise we don't have information about masking the
execute perms for both groups. The ACL would also fail aclcheck.
And while get_posix_access now returns the "is standard acl" flag,
it hasn't been utilized by set_created_file_access. Rather,
set_created_file_access has simply continued to check for
nentries > MIN_ACL_ENTRIES, which led to all kinds of weird group
and CLASS_OBJ perms. The new code now always manipulates CLASS_OBJ
perms if a CLASS_OBJ is present, and it always manipulates group perms
if the ACL has been marked as "standard" ACL.
Another problem (not related to commit 97d0449) is the order
get_posix_access adds missing perms. CLASS_OBJ perms are computed
*before* missing GROUP_OBJ perms have been added. Thus the CLASS_OBJ
perms could be too tight and led to additional, buggy DENY ACEs.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This partially reverts commit 10a30e7 as far as the Cygwin version of
the __getreent function is concerned. Remove _COMPILING_NEWLIB guard
only allowing to use __getreent inline function when building newlib,
since we wan to use it in Cygwin as well.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Signed-off-by: Stefan Assmann <sassmann@redhat.com>
This reverts commit 4de8596. It worked around a problem which was
actually introduced by patch 10a30e7 a few weeks ago. Rather than
adding special code to the newlib version of __getreent, the followup
patch reinstantiates the original, Cygwin-only implementation of
__getreent.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Signed-off-by: Stefan Assmann <sassmann@redhat.com>
No real domain, no DC, no infos via NetUserGetInfo... nothing. Just nothing.
Use fixed uid 0x1000 (4096) for AzureAD user and gid 0x1001 (4097) for
AzureAD group. Note that this group is part of the user token, but it's
not the primary group. The primary group SID is, unfortunately, the
user's SID.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far the lib function __getreent always returned _impure_ptr. On Cygwin
this is only correct after _impure_ptr got initialized. The inline
function in include/cygwin/config.h always returns the right _reent ptr,
though.
After introducing per-thread locales, the __getreent function is called
prior to initialization of _impure_ptr (from dll_crt0_0) to access the
locale pointer, which leads to a crash.
Fix the __getreent lib function for Cygwin to return the correct _reent
pointer all the time. Rename inline function to __inline_getreent
and introduce a macro __getreent calling the inline function. Change
the lib function __getreent to call __inline_getreent on Cygwin.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Add global const __C_locale for reference purposes.
Bump Cygwin API minor number and DLL major version number to 2.6.0.
Signed-off by: Corinna Vinschen <corinna@vinschen.de>
This allows looping through the structs and buffers. Also
rearrange definitions to follow order of LC_xxx values.
Signed-off by: Corinna Vinschen <corinna@vinschen.de>
Don't use global variables. This allows to call loadlocale from
the yet to be created newlocale().
Rename _thr_locale_t to __locale_t (these locales are not restricted
to threads so the name is misleading).
Along these lines, fix _set_ctype to take a __locale_t as parameter.
Signed-off by: Corinna Vinschen <corinna@vinschen.de>
- Remove charset parameter from low level __foo_wctomb/__foo_mbtowc calls.
- Instead, create array of function for ISO and Windows codepages to point
to function which does not require to evaluate the charset string on
each call. Create matching helper functions. I.e., __iso_wctomb,
__iso_mbtowc, __cp_wctomb and __cp_mbtowc are functions returning the
right function pointer now.
- Create __WCTOMB/__MBTOWC macros utilizing per-reent locale and replace
calls to __wctomb/__mbtowc with calls to __WCTOMB/__MBTOWC.
- Drop global __wctomb/__mbtowc vars.
- Utilize aforementioned changes in Cygwin to get rid of charset in other,
calling functions and simplify the code.
- In Cygwin restrict global cygheap locale info to the job performed
by internal_setlocale. Use UTF-8 instead of ASCII on the fly in
internal conversion functions.
- In Cygwin dll_entry, make sure to initialize a TLS area with a NULL
_REENT->_locale pointer. Add comment to explain why.
Signed-off by: Corinna Vinschen <corinna@vinschen.de>
Move all locale category structure definitions into setlocale.h and remove
other headers in locale subdir. Create inline accessor functions for
current category struct pointers and use throughout. Use pointers to
"C" locale category structs by default in __global_locale.
Signed-off by: Corinna Vinschen <corinna@vinschen.de>
Introduce first cut of struct _thr_locale_t used for the locale_t definition.
Introduce global instance called __global_locale used by default.
Introduce internal inline functions __get_global_locale, __get_locale_r,
__get_current_locale.
Remove usage of global variables in favor of accessor functions pointing to
__global_locale for now. Include all local headers in locale subdir from
setlocale.h to get single include for internal locale access.
Introduce __CTYPE_PTR macro to replace direct access to __ctype_ptr__
and use throughout in isxxx functions.
Signed-off by: Corinna Vinschen <corinna@vinschen.de>
This is a followup to a report back in 2011 about essentially the same issue:
https://cygwin.com/ml/cygwin/2011-04/msg00031.html
The same test program in that report demonstrates the issue, but with
kill sending any non-zero signal. To reiterate, the problem here is
POSIX compliance with respect to sending signals to zombie processes.
http://pubs.opengroup.org/onlinepubs/9699919799/functions/kill.html
claims:
Existing implementations vary on the result of a kill() with pid
indicating an inactive process (a terminated process that has not been
waited for by its parent). Some indicate success on such a call
(subject to permission checking), while others give an error of
[ESRCH]. Since the definition of process lifetime in this volume of
POSIX.1-2008 covers inactive processes, the [ESRCH] error as described
is inappropriate in this case. In particular, this means that an
application cannot have a parent process check for termination of a
particular child with kill(). (Usually this is done with the null
signal; this can be done reliably with waitpid().)
In response to the originally issue, this was fixed *specifically* for
the case of kill(pid, 0). But my reading of the above is that kill()
should return 0 in this case regardless of the signal (modulo
permissions, etc.). On Linux, for example, when calling kill with pid
of a zombie process the kernel will happily deliver the signal to the
relevant task_struct; it will just never be acted on since the task
will never run again.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit d7586cb incorrectly checked only for the new cursor position
beyond the old cursor position to decide if we have to correct for user
scrolling. Since this situation is handled just fine if the cursor is
still visible, only perform the subsequent correction if the cursor is
not in the visible console window.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit ba58e5f lowered permission requirements when opening threads
and processes to {PROCESS,THREAD}_QUERY_LIMITED_INFORMATION. However,
when creating the /proc/<PID>/maps file, the call to VirtualQueryEx
requires PROCESS_QUERY_INFORMATION access
Note: It seems PROCESS_QUERY_LIMITED_INFORMATION is sufficient starting
with Windows 8.1, but this is neither documented on MSDN, nor is it a
safe bet. It may have to do with a fixed implementation of the UAC
trust levels. Let's better follow the docs for now.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
We must call SetConsoleCursorPosition prior to SetConsoleWindowInfo,
otherwise the scroll bars will not be updated by the OS. Make sure
to scroll the console window by just the right amount to have the
new cursor position one line after the used console buffer area at
the top of the console window, no matter the scroll state.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
SIGTTIN should be raised when read() is made on a tty in a backgrounded
process, but not when it's tested with poll()/select().
I guess poll()/select() does need to call bg_check(), in order to detect the
error conditions that notices (that is, if bg_check() returns bg_eof or
bg_error, then fd is ready as an error condition exists) so add an optional
parameter to fhandler_base::bg_select() to indicate that signals aren't
desired.
See https://cygwin.com/ml/cygwin-developers/2016-07/msg00004.html
Mingw-w64, which is the source of this code, uses different
definitions of the rounding bits FE_TONEAREST and friends.
They immediately reflect the bit values in the FPU control word,
while on Cygwin they are shifted down to become the values 0-3.
Fix the bit computing expression to account for the difference.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
get_nt_native_path handles the transposition of chars not allowed
in Windows pathnames. However, it never starts transposition at
the start of the string, which is wrong for relative paths. Fix it.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
POSIX requires that SSIZE_MAX have the same type as ssize_t, but
on 32-bit, we were defining it as a long even though ssize_t
resolves to an int. It also requires that SSIZE_MAX be usable
via preprocessor #if, so we can't cheat and use a cast.
If this were newlib, I'd have had to hack _intsup.h to probe the
qualities of size_t (via gcc's __SIZE_TYPE__), similar to how we
already probe the qualities of int8_t and friends, then cross our
fingers that ssize_t happens to have the same rank (most systems
do, but POSIX permits a system where they differ such as size_t
being long while ssize_t is int). Unfortunately gcc gives us
neither __SSIZE_TYPE__ nor __SSIZE_MAX__. On the other hand, our
limits.h is specific to cygwin, so we can just shortcut to the
correct results rather than being generic to all possible ABI.
Signed-off-by: Eric Blake <eblake@redhat.com>
At fork time the .data and .bss segments of the Cygwin DLL are copied
over to the child process. This also copies the strace timer since
it's in the .bss segment so far. Fix that by moving the strace timer
out into the .data_cygwin_nocopy segment.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The _reent members _current_category and _current_locale are not
used at all. _current_locale is set to "C" in various points of
the code but its value is just as unused as _current_category.
This patch redefines these members without changing the size of the
structure to allow for an implementation of per-thread locales per
POSIX-1.2008 (i.e. uselocale and usage of the per-thread locale in
subsequent function calls).
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit b1b46d45 introduced a regression. After redefining FIONREAD
as part of restructuring newlib/Cygwin headers, the call to ioctlsocket
in the FIONREAD branch of fhandler_socket::ioctl should have been
changed to use the Winsock definition of FIONREAD, which I neglected.
This only affects 64 bit Cygwin.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
In get_mem_values we open the process without PROCESS_VM_READ access
and are *still* able to request working set information, despite
MSDN claiming we need it for this purpose. Instead of adding this
access right, just add an comment to point this out for now.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Using PROCESS/THREAD_QUERY_INFORMATION may limit the number of
processes/threads we can inspect depending on their integrity level.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Always create child user window station and desktop, unless only
spawning with restricted token. Also fix formatting of a few comments
in child_info_spawn::worker.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Convert sys_privs to const struct with TOKEN_PRIVILEGES layout.
Drop function get_system_priv_list. Just use pointer to sys_privs.
Dropping max_sys_priv from wincaps requires to make sure that the
bitfield is 8 byte aligned on x86_64, otherwise gcc (5.3 only?)
apparently breaks access to the bitfield (off by 4 bytes).
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The change introduced in commit b2867a6 contains a faulty check for
the major device number in fhandler_dev_floppy::lock_partition.
Fix this. Also fix comments.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Revamp device parsing code. Introducing support for more partitions
into the shilka-generated parser has the unfortunate side-effect of
raising the size of the DLL by almost 2 Megs. Therefore we split out
the handling for /dev/sdXY devices into a tiny bit of hand-written
code.
While at it, remove some unused cruft from devices.* and generally
clean up the device class to provide access methods instead of direct
access to members.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Bump GPLv2+ to GPLv3+ for some files, clarify BSD 2-clause.
Everything else stays under GPLv3+.
New Linking Exception exempts resulting executables from LGPLv3 section 4.
Add CONTRIBUTORS file to keep track of licensing.
Remove 'Copyright Red Hat Inc' comments.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
fhandler_base::open_fs has two problems:
- When newly creating a file, the file info in the path_conv is
incorrect. It points to info for the parent dir, not to info
for the file itself (which, naturally, wasn't available before).
- Fetching the file's inode number only worked for non-NFS.
Both problems should be fixed now by reloading file info if the file
has just been created, as well as using the new FS-agnostic
path_conv::get_ino method.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This avoids having to call nfs_fetch_fattr3/file_get_fai depending
on FS type as well as having to extract the info FS dependent.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Rather than having to check for the FS type in the caller and having
to call different functions whether FS is NFS or not, encapsulate the
info in path_conv_handle/path_conv methods to allow FS type agnostic
calling from upper level functions.
This patch only implements the methods.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit a23e6a35d8 introduced a timer
object to the WFMO handling in select_stuff::wait to allow sub-tickcount
timeout values in select.
Problems with this patch: The timer was created and destroyed on every
invocation of select_stuff::wait, thus potentially multiple times per
select. Also, since the timer was prepended to the WFMO hande list,
the timer handle could shadow actual events on other objects, given that
WFMO checks the objects in the order they have been specified in the
HANDLE array. The timer was also created/destroyed and added to the
HANDLE array even if it was not required.
This patch drops the local timer HANDLE and recycles the cw_timer HANDLE
in the cygtls area instead. Thus we typically don't need to create the
timer in select at all, and we never have to destroy it.
The timer HANDLE is now also appended as last object to the HANDLE array,
and it's only added if actually needed.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The check for current timestamp > start timestamp has an unwelcome
side effect: The loop is not left as long as the current timestamp
hasn't been incremented. This leads to busy loops of about one tick
(10 to 16 ms per MSDN).
This fixes https://cygwin.com/ml/cygwin/2016-05/msg00327.html
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
'man termios' says:
"A read(2) returns at most one line of input" in canonical mode.
On cygwin 2.5.1, read(2) returns all data in buffer if the buffer
size specified is large enough. This behaviour is correct in
noncanonical mode, but is not correct in canonical mode.
While checking this problem, I found a bug of tcflush(). tcflush()
flushes only partial data in the buffer. The patch also fixes this bug.
The patch has also been tested against the problem reported in
https://cygwin.com/ml/cygwin/2016-05/msg00318.html.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The rule to make tlsoffset{64}.h has a flaw. If cygtls.h can't be
built for whatever reason, it *still* regenerates tlsoffsets{64}.h,
just with size 0. If the bug is not in cygtls.h itself, this behaviour
breaks further building, because fixing the problem won't result in
regenerating tlsoffset{64}.h. Manual intervention is required.
Fix that by removing tlsoffsets{64}.h if gentls_offsets fails.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Using libattr's <xattr/xattr.h> requires consumers to explicitly include
<sys/types.h> first, but glibc's header in sys/ already contains the include.
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
Temporarily revert to use PROCESS_QUERY_INFORMATION instead of
PROCESS_QUERY_LIMITED_INFORMATION to make sure every aspect of the
next release is still XP/2003 compatible.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
We're appending a dot to the filename before calling LoadLibrary to
override ".dll" automagic. This only worked for paths, not for simple
filenames since it required a slash in the pathname. Fix that.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far drive letter paths have been handled special since path_conv
leaves the incoming path untouched except for converting backslashes
to forward slashes. However, if the incoming path starts with a
long path prefix, the same problem occurs. Therefore handle all
paths starting with a backslahs the same way.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
In case the TZ variable is empty, Cygwin fetches timezone info from
Windows. Extracting the timezone short name uses isupper on wide chars.
Replace with explicit check for A <= character <= Z to be independent
of undefined behaviour.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Throughout mmap, size-related variables and parameters are still using
DWORD as type, which disallows mapping ranges > 4Gigs. Fix this by
using SIZE_T throughout for those vars and parameters.
Also, drop unused off parameter from 1st variant of mmap_record::map_pages.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far pthread::postcreate() only sets the thread priority at all, only
if the inherit-scheduler attribute is PTHREAD_EXPLICIT_SCHED. This
completely ignores the PTHREAD_INHERIT_SCHED case, since in contrast
to POSIX, a thread does not inherit its priority from the creating
thread, but always starts with THREAD_PRIORITY_NORMAL.
pthread_getschedparam() only returns what's stored in the thread attributes,
not the actual thread priority.
This patch fixes both problems.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far the scheduler priority handling is not POSIX compatible.
The priorities use a range of -14 up to +15, which means it's not clear
if the POSIX-required return value of -1 in case of an error is *really*
an error or just the valid priority value -1. Even more confusing, -14
is the *max* value and 15 is the *min* value. Last but not least this
range doesn't match the POSIX requirement of at least 32 priority values.
This patch cleans up scheduler priority handling and moves the valid
priority range to 1 (min) - 32 (max). It also adds a function
sched_get_thread_priority() which will help to make thread priority
more POSIX-like.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* select.h: Eliminate redundant select_stuff::select_loop state.
* select.cc (select): Eliminate redundant
select_stuff::select_loop state. Eliminate redundant code for
zero timeout. Do not return early on early timer return.
(select_stuff::wait): Eliminate redundant
select_stuff::select_loop state.
* select.h: Change prototype for select_stuff::wait() for larger
microsecond timeouts.
* select.cc (pselect): Convert from old cygwin_select().
Implement microsecond timeouts.
(cygwin_select): Rewrite as a wrapper on pselect().
(select): Implement microsecond timeouts.
(select_stuff::wait): Implement microsecond timeouts with a timer
object.
Always provide register_t via <sys/types.h> for glibc and BSD
compatibility. Define __BIT_TYPES_DEFINED__ to 1 like glibc for legacy
header files.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Resurrect <machine/_user_types.h> for use in <sys/types.h>. Newlib
targets may provide an own version of <machine/types.h> in their machine
directory to add custom user types for <sys/types.h>. Check the
_SYS_TYPES_H header guard to prevent a direct include of
<machine/types.h>, since the <machine/types.h> file is a Newlib
speciality.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
For all pthread init functions, POSIX says
Results are undefined if pthread_FOO_init() is called specifying an
already initialized pthread_FOO object.
So far our pthread init functions tested the incoming object if it's
already an initialized object and, if so, returned EBUSY. That's ok
*iff* the object was already initialized. However, as the example in
https://cygwin.com/ml/cygwin/2016-04/msg00473.html shows, an uninitialized
pthread object could also accidentally look like an initialized object
and then returning EBUSY is not ok.
Consequentially, all those tests are dangerous. Per POSIX, an application
has to know what its doing when calling any of the pthread init functions
anyway, and re-initializing the object is just as well as undefined
behaviour as is returning EBUSY on already initialized objects.
* thread.cc (pthread_attr_init): Drop check for already initialized
object.
(pthread_condattr_init): Ditto.
(pthread_rwlockattr_init): Ditto.
(pthread_mutexattr_init): Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Introduce <machine/_endian.h> to let target based customization of
<machine/endian.h> via
* _LITTLE_ENDIAN,
* _BIG_ENDIAN,
* _PDP_ENDIAN, and
* _BYTE_ORDER.
defines. Add definitions expected by FreeBSD to
<machine/endian.h> like
* _QUAD_HIGHWORD,
* _QUAD_LOWWORD,
* __bswap16(),
* __bswap32(),
* __bswap64(),
* __htonl(),
* __htons(),
* __ntohl(), and
* __ntohs().
Also, if __BSD_VISIBLE
* LITTLE_ENDIAN,
* BIG_ENDIAN,
* PDP_ENDIAN, and
* BYTE_ORDER.
Targets that define __machine_host_to_from_network_defined in
<machine/_endian.h> must provide their own implementation of
* __htonl(),
* __htons(),
* __ntohl(), and
* __ntohs(),
otherwise a default implementation is provided by <machine/endian.h>.
In case of GCC defines to builtins are used.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
We can't handle the S_ISGID bit if the child didn't inherit a NULL SID
ACE with the S_ISGID bit set. On directories without default ACL
entries we would have to add an inheritable NULL SID ACE and nothing else.
This in turn results in permission problems when calling set_file_sd
from set_created_file_access. That's fixable, but it would only work
for files created from Cygwin while files created from native Windows
tools end up with really ugly permissions.
This patch only makes sure that the S_ISGID bit is reset for a directory
if it has no inheritable ACEs. Still having the 's' bit shown in ls or
getfacl output would be misleading. So, calling `setfacl -k' on a dir
also removes the S_ISGID bit now.
* sec_acl.cc (set_posix_access): Drop S_ISGID bit on directories
without inheritable ACEs. Explain why.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far we tweaked ACL_GROUP_OBJ and ACL_MASK values the same way when
creating a file. We now do what POSIX requires, namely just change
ACL_MASK if it's present, otherwise ACL_GROUP_OBJ. Note that we only
do this at creation time. Chmod still tweaks both to create less
surprising results for the unsuspecting user.
Additionally make sure to take umask only into account if no ACL_MASK
value is present. That has been missed so far.
* sec_acl.cc (set_posix_access): Perform check for non-existant
default ACEs earlier. Ignore umask also if ACL_MASK is present.
Only set owner_eq_group if we're actually handling a user entry.
Mention chmod in a comment.
* security.cc (set_created_file_access): Perform group/mask
permission setting as required by POSIX 1003.1e.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit e2ea143 forgot to take special POSIX bits into account.
* sec_acl.cc (set_posix_access): Make sure to create NULL SID
ACE if any special POSIX permission bits are set.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit f75114fc was supposed to drop NULL SIDs in case the permissions
are simple enough not to require mask values or special POSIX bits
(S_ISVTX, etc). The check was incorrect. This patch is supposed to
fix the problem.
* sec_acl.cc (set_posix_access): Fix condition under which we
write a NULL SID.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Newlib defines defaults for internal types via <sys/_types.h> and uses
<machine/_types.h> to let targets define their own type if necessary.
Previously for example
#ifndef __dev_t_defined
typedef short __dev_t;
#endif
However, the __*_t_defined pattern conflicts with the glibc type guard
pattern for user types, e.g. dev_t in this example. Introduce a
__machine_*_t_defined pattern for internal types (defined by
<machine/_types.h>, used by <sys/_types.h>). For example
#ifndef __machine_dev_t_defined
typedef short __dev_t;
#endif
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Remove off_t typedef from cygwin/types.h thus relying on sys/types.h.
Introduce winsup/cygwin/machine/_types.h and move some types shared
with newlib into it. Get rid of their definition in cygwin/types.h.
Add same handling for __key_t/key_t as for the other types.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This change solves a glibc/BSD compatibility problem.
glibc and BSD use double underscore types for internal types. The Linux
port of Newlib uses some glibc provided internal type definitions which
are not protected by guard defines, e.g. __off_t. To avoid a conflict
Newlib uses single underscore types for some internal types, e.g.
_off_t. However, for BSD compatibility we have to define the internal
types with double underscore names in <sys/_types.h>.
The header file <machine/types.h> is Newlib-specific. It was used
instead of <sys/_types.h> to provide the internal type definitions
_CLOCK_T, _TIME_T_, _CLOCKID_T_, _TIMER_T_, and __suseconds_t. Move
these definitions to <sys/_types.h> (there exist two instances of this
file, one for Linux and one for all other targets). This makes the
_HAVE_SYSTYPES configuration define obsolete (could possibly break the
__RDOS__ target). Use the standard <sys/_types.h> include throughout.
Move __loff_t defintion to default (non-Linux) <sys/_types.h>. Define
it via _off64_t to avoid a dependency on the compiler.
Provide the __off_t definition via default (non-Linux) <sys/_types.h>
based on _off_t for all systems except Cygwin. For Cygwin use _off64_t.
Define off_t via __off_t.
Provide the __pid_t definition via default (non-Linux) <sys/_types.h>.
This prevents a potential __pid_t and pid_t incompatibility. Add BSD
guard defines for pid_t.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Cygwin's strxfrm/wcsfrm treated a too short output buffer as an error
condition and always returned the size value provided as third parameter.
This is not as it's documented in POSIX.1-2008. Rather, the only error
condition is an invalid input string(*).
Other than that, the functions are supposed to return the length of the
resulting sort key, even if the output buffer is too small. In the latter
case the content of the output array is unspecified, but it's the job
of the application to check that the return value is greater or equal to
the provided buffer size.
(*) We have to make an exception in Cygwin: strxfrm has to call the
UNICODE function LCMapStringW for reasons outlined in a source comment.
If the incoming multibyte string is so large that we fail to malloc
the space required to convert it to a wchar_t string, we have to
ser errno as well since we have nothing to call LCMapStringW with.
* nlsfuncs.cc (wcsxfrm): Fix expression computing offset of
trailing wchar_t NUL. Compute correct return value even if
output buffer is too small.
(strxfrm): Handle failing malloc. Compute correct return value
even if output buffer is too small.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
In 7346568 (Make requested console reports work, 2016-03-16), code was
introduced to report the current cursor position. It works by using a
pointer that either points to the next byte in the readahead buffer, or
to a NUL byte if the buffer is depleted, or the pointer is NULL.
These conditions are heeded in the fhandler_console::read() method, but
the condition that the pointer can point at the end of the readahead
buffer was not handled properly in the get_cons_readahead_valid()
method.
This poses a problem e.g. in Git for Windows (which uses a slightly
modified MSYS2 runtime which is in turn a slightly modified Cygwin
runtime) when vim queries the cursor position and immediately goes on to
read console input, erroneously thinking that the readahead buffer is
valid when it is already depleted instead. This condition results in an
apparent freeze that can be helped only by pressing keys repeatedly.
The full Git for Windows bug report is here:
https://github.com/git-for-windows/git/issues/711
Let's just teach the get_cons_readahead_valid() method to handle a
depleted readahead buffer correctly.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This reverts commit 0008bdea02.
This patch introduced a regression. Calling FOO=$(...) in zsh hangs
indefinitely and has to be killed forcefully.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
POSIX spawn and thread barriers have since been added. Also fix a typo in
_POSIX2_C_DEV (result is the same).
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
As a Cygwin-specific header, there is no need to guard functions based on
capability macros. Instead, guard several blocks based on additions or
removals in later versions of POSIX.1, along with a few which are only
XSI or GNU extensions.
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
G++ 6.0 asserts that the "this" pointer is non-null for member
functions.
Refactor methods that check if "this" is non-null to resolve this.
winsup/cygwin/ChangeLog:
external.cc (cygwin_internal): Check for a null pinfo before calling
cmdline.
fhandler_dsp.cc (Audio::blockSize): Make static.
fhandler_dsp.cc (Audio_in): add default_buf_info.
fhandler_dsp.cc (Audio_out): Ditto.
fhandler_dsp.cc (Audio_out::buf_info): Refactor method to call
default_buf_info if dev_ is null.
fhandler_dsp.cc (Audio_in::buf_info): Ditto.
fhandler_dsp.cc (fhandler_dev_dsp::_ioctl): Call Audio_out::default_buf_info if audio_out_ is null.
fhandler_dsp.cc (fhandler_dev_dsp::_ioctl): Call Audio_in::default_buf_info if audio_in_ is null.
fhandler_process.cc (format_process_fd): Check if pinfo is null.
fhandler_process.cc (format_process_root): Ditto.
fhandler_process.cc (format_process_cwd): Ditto.
fhandler_process.cc (format_process_cmdline): Ditto.
signal.cc (tty_min::kill_pgrp): Ditto.
signal.cc (_pinfo::kill0): Ditto.
sigproc.cc (pid_exists): Ditto.
sigproc.cc (remove_proc): Ditto.
times.cc (clock_gettime): Ditto.
times.cc (clock_getcpuclockid): Ditto.
path.cc (cwdstuff::override_win32_cwd): Check if old_cwd is null.
path.cc (fcwd_access_t::Free): Factor null check of "this" out to
caller(s).
pinfo.cc (_pinfo::exists): Ditto.
pinfo.cc (_pinfo::fd): Ditto.
pinfo.cc (_pinfo::fds): Ditto.
pinfo.cc (_pinfo::root): Ditto.
pinfo.cc (_pinfo::cwd): Ditto.
pinfo.cc (_pinfo::cmdline): Ditto.
signal.cc (_pinfo::kill): Ditto.
pinfo.cc (_pinfo::commune_request): remove non-null check on "this", as
this method is only called from pinfo.cc after null checks
pinfo.cc (_pinfo::pipe_fhandler): remove non-null check on "this", as
this method is only called from pipe.cc (fhandler_pipe::open) after a null check.
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
Rename without-mingw-progs to with-cross-bootstrap, since it now
disables additional checks that are problematic for cross-compilers.
When cross-compiling a toolchain targeting cygwin, building cygwin1.dll
requires libgcc.
However, building libgcc requires the cygwin headers to be
installed.
Configuring cygwin requries the mingw-crt libraries, which require the
cygwin headers to be installed.
Work around this circular dependency by making the
--with-cross-bootstrap configure option skip cygwin's configure checks
for valid mingw-crt libraries. Cygwin will still properly link against
these libraries if they exist, but this allows configure to succeed even
if the libraries have not been built yet.
Since the mingw-crt libraries only require the cygwin headers to be
installed, this allows us to successfully configure cygwin so that we
can only install the headers without trying to build any
libraries.
winsup/ChangeLog
configure.ac: rename without-mingw-progs option to with-cross-bootstrap
configure: regenerate
winsup/cygserver/ChangeLog
configure.ac: don't check AC_WINDOWS_LIBS when using with-cross-bootstrap
configure: regenerate
winsup/cygwin/ChangeLog
configure.ac: don't check AC_WINDOWS_LIBS when using with-cross-bootstrap
configure: regenerate
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
Use the 3-arg form of AC_DEFINE.
winsup/cygwin/ChangeLog:
acconfig.h: Remove DEBUGGING define.
configure.ac: Add description to DEBUGGING define.
config.h.in: Regenerate.
configure: Ditto.
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
HAVE_BUILTIN_MEMTEST and AC_ALLOCA were removed in 4bd8eb7d1b.
Cleanup leftover references.
winsup/cygwin/ChangeLog
acconfig.h: remove HAVE_BUILTIN_MEMTEST
config.h.in: regenerate
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
When building cygwin in a combined tree with binutils,
the just-built windres cannot find the just-buit gcc automatically.
Parse the CC env variable to use the correct compiler, rather then
falling back to the build-system's gcc which does not define the proper
preprocessor macros.
winsup/cygwin/ChangeLog
mkvers.sh: Manually specify preprocessor based on $CC
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
The type for the ip_tos member was typoed, fix it.
winsup/cygwin/ChangeLog:
include/netinet/ip.h: fix type of ip_tos
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
After `make clean', the build can fail because the dependencies don't
require the tlsoffsets file to exist before building obejct files.
This patch fixes it.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
On Linux and in Mingw-w64, fexcept_t is defined as type unsigned short.
There are packages in the wild which rely on the fact that fexcept_t is
an integral type. We're changing the internal handling to use the bits
just as in GLibc, so only the 6 lowest bits are used to reflect the hw
bits. We even change the header file guard to reflect GLibc for compatibility.
* include/fenv.h (_FENV_H): Rename from _FENV_H_ and set to 1 as in
GLibc's header.
(fexcept_t): Change to __uint16_t to be an integral type as in GLibc.
* fenv.cc (fegetexceptflag): Align to the *flagp's type change.
(fesetexceptflag): Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This patch adds the long double functions missing in newlib to Cygwin.
Apart from some self-written additions (exp10l, finite{f,l}, isinf{f,l},
isnan{f,l}, pow10l) the files are taken from the Mingw-w64 math lib.
Minor changes were required, e.g. substitue _WIN64 with __x86_64__ and
fixing __FLT_RPT_DOMAIN/__FLT_RPT_ERANGE for Cygwin.
Cygwin:
* math: New subdir with math functions.
* Makefile.in (VPATH): Add math subdir.
(MATH_OFILES): List of object files collected from building files in
math subdir.
(DLL_OFILES): Add $(MATH_OFILES).
${CURDIR}/libm.a: Add $(MATH_OFILES) to build.
* common.din: Add new functions from math subdir.
* i686.din: Align to new math subdir. Remove functions now commonly
available.
* x86_64.din: Ditto.
* math.h: math.h wrapper to define mingw structs used in some files in
math subdir.
* include/cygwin/version.h: Bump API minor version.
newlib:
* libc/include/complex.h: Add prototypes for complex long double
functions. Only define for Cygwin.
* libc/include/math.h: Additionally enable prototypes of long double
functions for Cygwin. Add Cygwin-only prototypes for dreml, sincosl,
exp10l and pow10l. Explain why we don't add them to newlib.
* libc/include/tgmath.h: Enable long double handling on Cygwin.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
setstate is supposed to take a char *, not a const char *.
* random.cc (setstate): Unconstify parameter to align to stdlib.h.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The inclusion of <sys/cygwin.h> by <sys/shm.h>, besides causing namespace
pollution, also makes it very difficult to get the WINVER-dependent parts
of the former. This affects code (such as x11vnc -unixpw_nis) which use
both SysV shared memory (e.g. the X11 MIT-SHM extension) and user password
authentication.
getpagesize is the simplest function to retreive this information, but it
is a legacy function and would also pollute the global namespace. The LSB
lists another form which is in the implementation-reserved namespace:
http://refspecs.linuxfoundation.org/LSB_3.1.0/LSB-Core-generic/LSB-Core-generic/baselib---getpagesize.html
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
Prototypes also added for initstate() and setstate() but they
were not implemented in the shared newlib code.
* newlib/libc/include/cygwin/stdlib.h: Prototypes added.
* winsup/cygwin/include/cygwin/stdlib.h: Prototypes removed.
* newlib/libc/stdlib/random.c: New file.
* newlib/libc/machine/epiphany/machine/stdlib.h: Removed
* newlib/libc/stdlib/Makefile.am: Added random.c.
* newlib/libc/stdlib/stdlib.tex: Added random.def.
* newlib/libc/stdlib/Makefile.in: Regenerated.
Don't use u_char, u_short, u_int or u_long in Cygwin, unless it refers
to the Winsock types. Use u_intN_t in BSD-based sources, unsigned char
where strings are concerned, uintN_t otherwise. Also:
* net.cc: Fix comment, we're not using u_long anymore.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
FIONBIO is defined in sys/termios.h and asm/socket.h. Align the comments.
Remove unused REAL_FIONBIO.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
u_char, u_short, u_int, u_long are BSD-only types. Remove them from
Cygwin headers which are supposed to be used in a non-BSD scenario.
Drop special Cygwin handling of those types in sys/types.h.
newlib:
* libc/include/sys/types.h (u_char,u_short,u_int,u_long): Drop
Cygwin exception.
cygwin:
* fhandler_socket.cc (fhandler_socket::ioctl): Accommodate change
in include/asm/socket.h. Continue using u_long since that's the
MS type here.
* include/asm/socket.h: Since the type given in _IOR/_IOW macros
is only used for its sizeof, replace u_long with equivalent long.
* netdb.h (getnetbyaddr): Fix prototype.
* netinet/ip.h: Replace old BSD-only types with generically defined
old BSD types (u_char -> u_int8_t, etc).
* netinet/tcp.h: Ditto.
* netinet/udp.h: Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The u_intN_t types are BSD types but sanctioned by POSIX. They are
always defined when using Glibc headers so we follow suit.
newlib:
* libc/include/sys/types.h: Drop outdated __INTTYPES_DEFINED__
macro. Always define u_intN_t types.
cygwin:
* include/cygwin/types.h: Remove definition of u_intN_t types.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far any group in the user's token could be used as primary group.
Windows doesn't check if the primary group is enabled or not, it just
has no meaning. From a POSIXy point of view it can lead to weird
results though.
* uinfo.cc (check_token_membership): New static function.
(internal_getlogin): Only allow enabled groups as primary group.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
A user token can be up to 64K in size. Using 32K buffers for TOKEN_GROUPS
may be insufficient.
* uinfo.cc (get_logon_sid): Use 64K buffers for the TOKEN_GROUPS
array.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
A user token can be up to 64K in size. The group list might take a lot
of that so use tmp_pathbuf allocated space rather than stack space
allocted via alloca. In create_token the TOKEN_GROUP was allocated via
malloc, but the code is needlessly complicated. Simplify by using
tmp_pathbuf as well.
* sec_auth.cc (verify_token): Allocate TOKEN_GROUP via tmp_pathbuf.
(create_token): Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
As long as we're not building in C++14 mode, the definition of the
sized delete operator results in a compatibility warning.
* cxx.cc (operator delete): Disable C++14 warning for sized variant.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
When compiling with -std=c++14 (the default for gcc 6.0+), the sized
deallocation operator must be defined to prevent undefined symbols when
linking.
winsup/cygwin/ChangeLog:
cxx.cc (operator delete(void *p, size_t)): Define.
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
The latest version of the mingw headers have been updated to make
DnsRecordListFree an alias of DnsFree when targeting Windows XP or later.
Use DnsFree directly, avoiding the wrapper function.
/home/peter/cross/src/cygwin/winsup/cygwin/libc/minires-os-if.c:289:
undefined reference to `DnsFree'
winsup/cygwin/ChangeLog
autoload.cc: Load DnsFree rather then DnsRecordListFree
libc/minires-os-if.cc (cygwin_query): Use DnsFree rather then DnsRecordListFree
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
GCC 6.0+ asserts that the memptr argument to the builtin function
posix_memalign is nonnull.
Add the necessary annotation to the prototype and
remove the now unnecessary check to fix a warning.
newlib/Changelog
newlib/libc/include/stdlib.h: Annotate arg to posix_memalign as
non-null.
winsup/cygwin/ChangeLog
malloc_wrapper.cc (posix_memalign): Remove always true nonnull check.
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
/dev/random calls getentropy. So there's no good reason to go out of
our way to open /dev/random just to call getentropy anyway.
* random.cc (srandomdev): Drop opening /dev/random in favor of
calling getentropy.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Newlib's default stdlib.h now defines these functions so we can
drop them from the Cygwin-specific header. Remove the arc4random_stir
and arc4random_uniform prototypes entirely. They shouldn't be used
by applications anymore.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
newlib:
* libc/stdlib/arc4random.h: Remove Cygwin-specific locking code.
Conditionalize arc4 locking. Check for _ARC4_LOCK_INIT being
undefined to fall back to default implementation.
cygwin:
* include/machine/_arc4random.h: New file.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* cygwait.h (cygwait_us) Remove; this reverts previous changes.
* select.h: Eliminate redundant select_stuff::select_loop state.
* select.cc (select): Eliminate redundant
select_stuff::select_loop state. Eliminate redundant code for
zero timeout. Do not return early on early timer return.
(select_stuff::wait): Eliminate redundant
select_stuff::select_loop state.
* cygwait.h: Add cygwait_us() methods.
* select.h: Change prototype for select_stuff::wait() for larger
microsecond timeouts.
* select.cc (pselect): Convert from old cygwin_select().
Implement microsecond timeouts.
(cygwin_select): Rewrite as a wrapper on pselect().
(select): Implement microsecond timeouts.
(select_stuff::wait): Implement microsecond timeouts with a timer
object.
* fhandler.h (fhandler_console): Move get_nonascii_key() from
select.c into this class.
* select.cc (peek_console): Move get_nonascii_key() into
fhandler_console class.
winsup/cygwin/pinfo.cc:465:14: error: the compiler can assume that the
address of 'tc' will always evaluate to 'true' [-Werror=address]
winsup/cygwin/ChangeLog
* pinfo.cc (_pinfo::set_ctty): remove always true check.
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
The missing braces cause only the first expression to be guarded by the
else clause.
winsup/cygwin/ChangeLog
* fhandler_disk_file.cc (facl): Add missing braces to if statement.
* mount.cc (dos_drive_mappings): Add missing braces to if statement.
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
This if is unconditionally false, so remove it.
winsup/cygwin/fhandler_console.cc: In member function 'bool dev_console::fillin(HANDLE)':
winsup/cygwin/fhandler_console.cc:740:22: error: self-comparison always evaluates to false [-Werror=tautological-compare]
if (b.dwSize.Y != b.dwSize.Y || b.dwSize.X != b.dwSize.X)
~~~~~~~~~~~^~~~~~~~~~~~~
winsup/cygwin/fhandler_console.cc:740:50: error: self-comparison always evaluates to false [-Werror=tautological-compare]
if (b.dwSize.Y != b.dwSize.Y || b.dwSize.X != b.dwSize.X)
~~~~~~~~~~~^~~~~~~~~~~~~
winsup/cygwin/ChangeLog
* fhandle_console.cc (fillin): remove dead code
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
initial_sp has been unused since commit fbf23e3 back in 2000.
Keep the value, so as to avoid changing the offset of magic_biscuit.
winsup/cygwin/lib/_cygwin_crt0_common.cc:140:52:
error: calling 'void* __builtin_frame_address(unsigned int)' with a
nonzero argument is unsafe [-Werror=frame-address]
u->initial_sp = (char *) __builtin_frame_address (1);
winsup/cygwin/ChangeLog
lib/_cygwin_crt0_common.cc (_cygwin_crt0_common): Initialize initial_sp
with nullptr.
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
Cygwin_props have been invented to allow switching off the unique
installation keys in the first place, supposedly for debugging.
This never really was a good idea, after all we *want* the installations
to be independent and there's no good reason to break that, not even
for debugging purposes.
Other than that, cygwin_props were meant to be used for some other global
settings which never took place. There's just no good reason to tweak
the DLL binary invisibly where a setting could be done in a file or the
environment.
This patch removes the cygwin_props entirely, including the related
settings in cygcheck.
cygwin:
* cygprops.h: Remove file.
* globals.cc (cygwin_props): Remove.
* cygheap.cc (init_cygheap::init_installation_root): Drop removing
installation key.
utils:
* cygcheck.cc: Drop including cygprops.h. Remove now unused option
values.
(unique_object_name_opt): Remove.
(handle_unique_object_name): Remove function.
(usage): Remove text for unique-object-names options.
(longopts): Remove unique-object-names options.
(main): Drop handling unique-object-names options.
doc:
* utils.xml (cygcheck): Remove text for unique-object-names options.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The bswap_* "functions" are macros in glibc, so they may be tested for
by the preprocessor (e.g. #ifdef bswap_16).
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
Throughout, simplify the C99/C11 conditionals, and replace
__STRICT_ANSI__ with the proper internal POSIX macros. The _*_r
reentrant functions need not be guarded (and most haven't been) because
such names in the global scope are reserved to the implementation.
atoff is unique to newlib.
dtoa is not actually exported (_dtoa_r is used internally), is
nonstandard, and the declaration conflicts with the code included in
MySQL, NSPR, and SpiderMonkey.
mktemp was removed in POSIX.1-2001.
The qsort_r declarations are reordered so that the GNU version retains
precedence.
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
MAXNAMLEN is a BSDism.
Use the proper internal macros instead of !_POSIX_SOURCE. telldir and
seekdir are XSI, scandir and alphasort are POSIX.1-2008, and scandirat
is GNU.
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
Add experimental code to workaround the issue described in the thread
starting at
https://cygwin.com/ml/cygwin/2015-07/msg00350.html
There's a hint in https://communities.vmware.com/message/2577858#2577858
that this problem is related to using the AI_ALL flag.
This patch checks if GetAddrInfoW returned with WSANO_RECOVERY and if
the AI_ALL flag was set, it retries GetAddrInfo without the AI_ALL flag.
* net.cc (cygwin_getaddrinfo): Add experimental code to retry
GetAddrInfoW without AI_ALL flag if it returned with WSANO_RECOVERY.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
If the ACL is supposed to reflect only standard POSIX permissions,
and if the permissions are so that user has more perms than group
and group has more perms than other, we don't really need the NULL
SID ACE. If the permissions are that simple, get_posix_access will
not call AuthZ.
* sec_acl.cc (set_posix_perms): Don't write NULL SID ACE if it's
not required. Explain why.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
When using RFC2307 uid/gid-mapping on Samba shares, the POSIX ACL contains
the Windows SIDs. When writing back such an ACL we have to map the
Windows SIDs back to the corresponding Samba SIDs representing the UNIX
uid/gid value. When reading Samba SIDs, make sure never to evaluate a
UNIX user account as group.
* sec_acl.cc (set_posix_access): Convert Windows SIDs to
RFC2307-mapped Sambe UNIX SIDs.
* sec_helper.cc (cygpsid::get_id): Skip UNIX user accounts when
trying to evaluate a SID as group. Skip UNIX group accounts when
trying to evaluate a SID as user.
* cygheap.h (cygheap_ugid_cache::reverse_get): New method to
get nfs id from cygwin id.
(cygheap_ugid_cache::reverse_get_uid): Wrapper for uids.
(cygheap_ugid_cache::reverse_get_gid): Wrapper for gids.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far creating cygsids requires to generate an "S-1-..." string
which is then converted to a SID by cygsid::getfromstr.
Add two new methods:
- cygsid::create (DWORD auth, DWORD subauth_count, ...)
... is a variable length list of subauth_count DWORD values being
the actual subauths.
- cygsid::append (DWORD rid)
allows to append a single RID to an alreaday constituted SID.
* security.h (cygsid::create): Declare public.
(cygsid::append): Ditto.
* sec_helper.cc (cygsid::create): Implement.
(cygsid::append): Implement.
* uinfo.cc (pwdgrp::fetch_account_from_windows): Use both new
methods as appropriate. Drop setting csid from string. Create
SID strings for printing SIDs only.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
gmonparam::state is used in calls to Win32 Interlocked functions.
Having this defined as int breaks the build on i686. Redefine as
LONG (same size and correct type on all platforms) to make gcc happy.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Hi.
I have noticed that Cygwin's spinlock goes into heavy sleeping code
for each spin. It seems it would be a good idea to actually try to
spin a bit first. There is this 'pause' instruction which let's the
CPU make such busy loops be less busy. Here is a patch to do this.
--
VH
This patch set modifies Cygwin's profiling support to sample PC values
of all an app's threads, not just the main thread. There is no change
to how profiling is requested: just compile and link the app with "-pg"
as usual. The profiling info is dumped into file gmon.out as always.
A new facility enabled via the environment variable GMON_OUT_PREFIX.
This facility is intended to match an undocumented Linux glibc feature.
Exporting the variable with a non-empty value such as "foo" causes the
profiling info to go to a file named foo.$pid instead of the default.
With that, both resulting processes of a fork() can have their profiling
data captured in separate files. gprof already knows how to accumulate
data from multiple files if they all pertain to the same app.
There is no change to the normal Cygwin execution paths if profiling is
not enabled. And when it is enabled, only the one profiling thread per
profiled app is doing more work than it used to.
* include/sys/cygwin.h: Add CW_CYGHEAP_PROFTHR_ALL.
* cygheap.cc (cygheap_profthr_all): New C-callable function that
runs cygheap's threadlist handing each pthread's thread handle in
turn to profthr_byhandle().
* external.cc (cygwin_internal): Add case CW_CYGHEAP_PROFTHR_ALL.
* gmon.c (_mcleanup): Add support for multiple simultaneous
gmon.out* files named via environment variable GMON_OUT_PREFIX.
* gmon.h (struct gmonparam): Make state decl volatile.
* mcount.c (_MCOUNT_DECL): Change stores into gmonparam.state to use
Interlocked operations. Add #include "winsup.h", update commentary.
* profil.c (profthr_byhandle): New function abstracting out the
updating of profile counters based on a thread handle.
(profthr_func): Update to call profthr_byhandle() to sample the main
thread then call cygheap_profthr_all() indirectly through
cygwin_internal(CW_CYGHEAP_PROFTHR_ALL) to sample all other threads.
(profile_off): Zero targthr to indicate profiling was turned off.
(profile_on): Fix handle leak on failure path.
(profile_child): New callback func to restart profiling in child
process after a fork if the parent was being profiled.
(profile_ctl): Call pthread_atfork() to set profile_child callback.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
According to https://cygwin.com/ml/cygwin/2016-03/msg00124.html it's a
problem to collect friendlyname info using AF_INET6 sockets. Fix problem
by exposing additional hardware info for all collected interfaces via the
pointer in the ifaddrs::ifa_data member.
* include/ifaddrs.h (struct ifaddrs_hwdata): Define as struct of
not yet exposed members of struct ifall, defined in net.cc.
* net.cc (struct ifall): Replace hardware dta members with struct
ifaddrs_hwdata. Accommodate throughout.
(get_ifs): Let ifaddrs ifa_data member point to ifall::ifa_hwdata
member.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Calling open from acl_extended_file{_nofollow} indiscriminately may hang
if the file is a FIFO. Ultimately the FIFO implementation needs a thorough
rewrite, but for the time being we better do what stat(2) and friends do:
Just create an fhandler directly.
* sec_posixacl.cc (__acl_extended_fh): New static function calling
fhandler::facl.
(acl_extended_fd): Just call __acl_extended_fh.
(__acl_extended_file): Take just a path_conv as parameter and
create temporary fhandler to call __acl_extended_fh.
(acl_extended_file): Create path_conv from incoming path and
call __acl_extended_file on it.
(acl_extended_file_nofollow): Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* ntdll.h (RtlGetNtVersionNumbers): Declare.
* wincap.cc (wincapc::init): Overwrite kernel version info
returned by RtlGetVersion with correct info returnd by
RtlGetNtVersionNumbers. Add comment.
Originally, using RtlGetVersion instead of GetVersionEx was supposed to
fix the fact that GetVersionInfo returns the wrong kernel version if the
executable has been built with an old manifest (or none at all), starting
with Windows 8.1. Either this never really worked as desired and our
testing was flawed, or this has been changed again with Windows 10, so
that RtlGetVersion does the kernel faking twist as well. Since we're
only reading the value in the first process in a process tree. the entire
process tree is running with a wrong OS version information in that case.
Fortunately, the (undocumented) RtlGetNtVersionNumbers function is not
affected by this nonsense, so we simply override the OS version info
fields with the correct values now.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The problem this patch fixes showed up after updating to gcc-5.3.0. The
cuplrit is a change in gcc when emitting section attributes. It only
shows up when building without optimization. Effect in Cygwin: ws2_32
functions failed to load.
In the original code the definition of "NO_COPY wsadata" was preceeding
an __asm__ block (the definition of the _wsock_init wrapper), while the
definition of "NO_COPY here" immediately follows the same assembler
block. When gcc-5.3.0 emits assembler code for the wsadata definition,
it emits the .data_cygwin_nocopy section attribute.
Next it emits the assembler output for the __asm_ block, entirely ignoring
its content. The __asm__ block adds a .text section definition.
Eventually gcc emits assembler code for the here definition. However,
apparently gcc still "knows" that it just emitted the .data_cygwin_nocopy
section attribute and so doesn't redefine it. Remember the __asm__? It
changed the section to .text.
So with gcc-4.9.3 we got:
.section .data_cygwin_nocopy,"w"
wsadata:
__asm__ block:
.text
.section .data_cygwin_nocopy,"w"
here:
With gcc 5.3.0 we now get:
.section .data_cygwin_nocopy,"w"
wsadata:
__asm__ block:
.text
here:
So "here" is now in the .text segment which is read-only. Hilarity ensues.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* sec_posixacl .cc (__acl_dup): Remove.
(acl_dup): Fold __acl_dup functionality into this function.
(acl_create_entry): Don't create new acl_t. Just realloc
acl->entry to make room for new aclent_t.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Makefile.in (DLL_OFILES): Add sec_posixacl.o.
(SUBLIBS): Add libacl.a
(libacl.a): New rule to create libacl.a.
* common.din: Export POSIX ACL functions as well as most libacl.a
extensions.
* fhandler.h (fhander_base::acl_get): New prototype.
(fhander_base::acl_set): Ditto.
(fhandler_disk_file::acl_get): Ditto.
(fhandler_disk_file::acl_set): Ditto.
* include/acl/libacl.h: New file.
* include/cygwin/version.h: Bump API minor version.
* include/sys/acl.h: Drop including cygwin/acl.h. Accommodate
throughout Cygwin. Add POSIX ACL definitions.
* sec_acl.cc: Include sec_posixacl.h. Replace ILLEGAL_UID and
ILLEGAL_GID with ACL_UNDEFINED_ID where sensible.
(__aclcheck): New internal acl check function to be used for
Solaris and POSIX ACLs.
(aclcheck32): Call __aclcheck.
(__aclcalcmask): New function to compute ACL_MASK value.
(__aclsort): New internal acl sort function to be used for Solaris
and POSIX ACLs.
(aclsort32): Call __aclsort.
(permtostr): Work directly on provided buffer.
(__acltotext): New internal acltotext function to be used for
Solaris and POSIX ACLs.
(acltotext32): Call __acltotext.
(__aclfromtext): New internal aclfromtext function to be used for
Solaris and POSIX ACLs.
(aclfromtext32): Call __aclfromtext.
* sec_posixacl.cc: New file implemeting POSIX ACL functions.
* sec_posixacl.h: New internal header.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* sec_auth.cc (get_token_group_sidlist): Drop auth_luid and
auth_pos parameter. Remove code adding a logon SID.
(get_initgroups_sidlist): Drop auth_luid and auth_pos parameter.
Drop in call to get_token_group_sidlist. Accommodate in callers.
(get_setgroups_sidlist): Ditto.
(create_token): Explicitely set auth_luid to ANONYMOUS_LOGON_LUID
or LOCALSERVICE_LUID depending on OS. Explain why.
Remove handling of logon SID since we don't generate one anymore.
(lsaauth): Drop now unused local variable auth_luid and auth_pos.
* wincap.h (wincaps::has_broken_whoami): New element.
* wincap.cc: Implement above element throughout.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This follows up from my msg re GMP-ECM failing its 'make check' on the
main list https://cygwin.com/ml/cygwin/2016-02/msg00147.html .
There's an error that ought to be reported during dynamic linking if the
linked-to address is too far from the relocation site. However the error
is not reported if __OPTIMIZE__ was #defined when building the Cygwin DLL.
I can't see why optimization settings should affect this.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* mount.cc (mount_info::conv_to_posix_path): Account for scenarios
where the path is identical to a mount point in terms of preserving
the trailing slash in the output.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
GCC 5 adds #line directives (and hence extra newlines) for macros
expansions, which confuses cygmagic. Using the -P flag avoids
them entirely.
https://cygwin.com/ml/cygwin-patches/2016-q1/msg00016.html
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
GCC 5 switched from C89 to C11 by default. This implies a change from
GNU to C99 inline by default, which have very different meanings of
extern inline vs. static inline:
https://gcc.gnu.org/onlinedocs/gcc/Inline.html
Marking these as gnu_inline retains the previous behaviour.
winsup/cygwin/
* exceptions.cc (exception::handle): Change debugging to int to fix
an always-true boolean comparison warning.
* include/cygwin/config.h (__getreent): Mark gnu_inline.
* winbase.h (ilockcmpexch, ilockcmpexch64): Ditto.
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
POSIX.1e requires that chmod changes the MASK rather than the
GROUP_OBJ value if the ACL is non-trivial.
On Windows, especially on home machines, a standard ACL often
consists of entries for the user, maybe the group, and additional
entries for SYSTEM and the Administrators group. A user calling
chmod on a file with bog standard Windows perms usually expects
that chmod changes the GROUP_OBJ perms, but given the rules from
POSIX.1e we can't do that.
However, since we already treat Admins and SYSTEM special in a
ACL (they are not used in MASK computations) we go a step in the
Windows direction to follow user expectations. If an ACL only
consists of the three POSIX permissions, plus entries for Admins
and SYSTEM *only*, then we change the permissions of the GROUP_OBJ
entry *and* the MASK entry.
* fhandler_disk_file.cc (fhandler_disk_file::chmod): Drop unused
code. Add special handling for a "standard" Windows ACL. Add
comment to explain.
* sec_acl.cc (get_posix_access): Allow to return "standard-ness"
of an ACL to the caller. Add preceeding comment to explain a bit.
* security.h (get_posix_access): Align prototype.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Handle additional ACE for primary group only as another GROUP
entry if it's an allow ACE. Deny ACEs don't qualify.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Observed running hexchat under X. For some reason the call to
LoadLibraryEx(..., LOAD_LIBRARY_SEARCH_SYSTEM32) in dll_load
hangs when trying to autoload MsgWaitForMultipleObjectsEx in
select.cc after hexchat forks to run DNS calls. Dropping the
call and just using full paths as in 2.3.1 fixes the issue.
* autoload.cc (dll_load): Drop call to LoadLibraryEx with
LOAD_LIBRARY_SEARCH_SYSTEM32 flag.
* wincap.h (wincaps::has_load_lib_search_flags): Remove.
* wincap.cc (wincaps::has_load_lib_search_flags): Drop handling
this flag.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Rename "res" to "wait_state" and change its type to
select_stuff::wait_states. Use select_stuff::wait_states
values instead of ints throughout. Rearrange a few comments.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
If the calling process doesn't have sufficient privileges to
fetch the linked token of an admin-user token, cygwin_logon_user
fails. This patch changes that by returning the original,
unprivileged token of the admin user to allow authentication
and calling setuid for the current process.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* sec_acl.cc (get_posix_access): Fix bracketing in expression
constructing POSIX group permissions so as not leaking deny bits
into POSIX file type bits.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* autoload.cc (wsock_init): Use MAKEWORD macro to create requested
version rather than handcrafted expression.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* autoload.cc (dll_load): Move safe loading from std_dll_init here.
Add code to handle systems supporting LOAD_LIBRARY_SEARCH flags.
Add comments to explain what the code is doing. Fix up comment
preceeding this function.
(std_dll_init): Move safe loading code to dll_load.
* wincap.h (wincaps::has_load_lib_search_flags): New element.
* wincap.cc: Implement above element throughout.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler.h (fhandler_base::get_plain_ino): New inline method.
Add comment to explain what it's supposed to be used for.
* fhandler_socket.cc (fhandler_socket::get_proc_fd_name): Create
filename using inode number.
(fhandler_socket::fstat): Generate inode number from filename if
ino is not set (that's the case in a stat(2) call).
* pipe.cc: Throughout, use get_plain_ino when appropriate.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This reverts commit 4b104ce070.
The DLLs always guaranteed to be loaded from the system dir are only
those in the KnownDLLs list. We're using some DLLs not in that list on
all supported OSes, thus we need to make sure to use full paths.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler.h (class fhandler_base): Convert unique_id to int64_t.
(fhandler_base::set_ino): New protected inline method.
(fhandler_base::get_unique_id): Convert to int64_t.
(fhandler_base::set_unique_id): New inline method taking int64_t.
(fhandler_pipe::fstat): Declare.
(fhandler_pipe::init): Take extra parameter.
(fhandler_pipe::create): Ditto.
* fhandler_socket.cc (fhandler_socket::init_events): Set inode number
to serial number.
(fhandler_socket::fstat): Set device to DEV_TCP_MAJOR. Create st_ino
from get_ino.
* include/cygwin/signal.h (struct _sigcommune): Replace
_si_pipe_fhandler with _si_pipe_unique_id.
* pinfo.h (_pinfo::pipe_fhandler): Take unique id instead of HANDLE.
* pinfo.cc (commune_process): Accommodate change to _si_pipe_unique_id.
(_pinfo::commune_request): Ditto.
(_pinfo::pipe_fhandler): Ditto.
* pipe.cc (fhandler_pipe::init): Take unique id as argument and set
inode number and unique_id from there.
(fhandler_pipe::open): Rework to find any matching pipe from unique
id in filename.
(fhandler_pipe::get_proc_fd_name): Create filename using inode number.
(fhandler_pipe::create): Generate and return unique id from process pid
and pipe_unique_id. In outer method, call init with additional unique
id as parameter.
(fhandler_pipe::fstat): New method.
(pipe_worker): Accommodate using 64 bit inode number in filename.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* select.cc (copyfd_set): Remove.
(select): Don't copy local wait fd arrays over to returned fd arrays
since bits set there are not accounted for in return value. Zero out
returned fd arrays instead. Always call sel.poll even in case of a
timeout. Always zero out fd array when timing out. Convert while/do
to do/while for clarity. Use dedicated variable as return value to
decouple return value from artificial return code from sel.wait.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* dcrt0.cc (dll_crt0_1), environ.cc (environ_init, getwinenveq,
build_env), strfuncs.cc (sys_wcstombs, sys_wcstombs_alloc),
wchar.c (sys_wcstombs, sys_wcstombs_alloc): avoid mis-conversions
of text that does not, actually, refer to a path or file name
Detailed explanation:
Our WCS -> UTF conversion handles the private Unicode page specially
to allow for otherwise invalid file names. However, this handling makes
no sense for command-lines, nor environment variables, which we would
rather convert verbatim.
As a stop-gap solution, let's just introduce a version of the
sys_wcstombs() function that specifically excludes that file name
conversion magic.
The proper solution is to change sys_wcstombs() to assume that it is not
a path that wants to be converted, and introduce sys_wcstombs_path()
that does, but that is a bigger task which we leave for another patch.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
* cygpath.cc (do_sysfolders): Drop lame workaround to fix case of
directory returned by GetSystemDirectoryW. Try to fix case of
any path returned by this function in case it has to return a
POSIX path to support case-sensitivity.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_disk_file::fchmod): Only request
query_write_dac rather than query_write_control access when writing
an ACL. Fix a comment.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* setfacl.cc (modacl): Move recomputing mask into new function.
(check_got_mask): New function checking if mask is in input.
(recompute_mask): New function to recompute mask.
(addmissing): Align mask computation to Linux setfacl.
(setfacl): Call check_got_mask and recompute_mask on Set, Delete and
Modify actions.
(usage): Rename --substitute to --set.
(longopts): Add --set option.
* utils.xml (setfacl): Rename --substitute to --set.
* new-features.xml (ov-new2.4): Rephrase setfacl changes.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* libc/include/sys/_sigset.h: New.
* libc/include/sys/select.h: Do not include <sys/types.h> and
<sys/time.h> to avoid cyclic header file dependencies. Include
specialized header files instead.
(sigset_t): Conditionally define.
* libc/include/sys/signal.h (sigset_t): Likewise.
* libc/include/sys/time.h: Include <sys/select.h> if
__BSD_VISIBLE.
* libc/include/sys/types.h: Likewise.
* path.h (class path_conv_handle): Use FILE_ALL_INFORMATION instead of
FILE_NETWORK_OPEN_INFORMATION. Use definitions from ntdll.h since it's
included anyway.
(path_conv_handle::fai): Change name from fnoi.
(path_conv::fai): Ditto.
(file_get_fai): Change name from file_get_fnoi. Drop second parameter.
* path.cc (file_get_fai): Ditto. Fetch FileAllInformation rather than
FileNetworkOpenInformation. Convert STATUS_BUFFER_OVERFLOW to
STATUS_SUCCESS. Remove workaround to fetch FileBasicInformation and
FileStandardInformation on filesystems with broken
FileNetworkOpenInformation handling.
(symlink_info::check): Accommodate above changes. In case of using
the NtQueryDirectoryFile fallback, fetch FileIdBothDirectoryInformation
to get inode number as well.
* fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop outdated
comment. Accommodate change to using FileAllInformation. Drop
extra function calls to fetch NumberOfLinks and IndexNumber. Set ino
directly from IndexNumber stored in pc.fai(). Drop second argument
from call to fstat_helper.
(fhandler_base::fstat_by_name): Drop second argument from call to
fstat_helper.
(fhandler_base::fstat_helper): Drop second parameter. Accommodate
the fact that we access a FILE_ALL_INFORMATION structure now.
(fhandler_base::open_fs): Set ino directly from IndexNumber stored in
pc.fai().
* fhandler.h (fhandler_base::fstat_helper): Fix declaration accrdingly.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (path_conv::get_ino_by_handle): Rename fai to
fii for clearness.
(fhandler_disk_file::readdir): Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* mount.cc (mount_info::from_fstab_line): Support mounting the current
user's temp folder as /tmp/. This is particularly useful a feature
when Cygwin's own files are write-protected.
* pathnames.xml: document the new usertemp file system type
Detailed explanation:
In the context of Windows, there is a per-user directory for temporary
files, by default specified via the environment variable %TEMP%. Let's
allow to use that directory for our /tmp/ directory.
With this patch, we introduce the special filesystem type "usertemp":
By specifying
none /tmp usertemp binary,posix=0 0 0
in /etc/fstab, the /tmp/ directory gets auto-mounted to the directory
specified by the %TEMP% variable.
This feature comes handy in particularly in scenarios where the
administrator might want to write-protect the entire Cygwin directory
yet still needs to allow users to write into the /tmp/ directory.
This is the case in the context of Git for Windows, where the
Cygwin (MSys2) root directory lives inside C:\Program Files and hence
/tmp/ would not be writable otherwise.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
* libc/include/sys/types.h: Move definitions of NBBY and howmany to
sys/param.h. Move definitions of select(2) macros to sys/select.h.
* libc/include/sys/param.h: See above.
* libc/include/sys/select.h: Move Cygwin's sys/select.h here.
* include/sys/select.h: Move select(2) macros from newlib's sys/types.h
here. Rename howmany to _howmany to unclutter namespace. Move file to
newlib.
* libc/rexex.cc: Add declaration for cygwin_gethostname.
* poll.cc: Include sys/param.h and locale select.h.
* select.h (cygwin_select): Declare.
* uname.cc: Declare cygwin_gethostname.
* winsup.h: Drop declarations of cygwin_select and cygwin_gethostname.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* dcrt0.cc: Semi-revert commit 12743c2d5d.
(dll_crt0_0): Drop setting wow64_needs_stack_adjustment on 64 bit.
(_dll_crt0): Split out 64 bit code again and always create new main
thread stack, unless forked off from the non main thread in the parent.
Call create_new_main_thread_stack with parent stack commitsize if
started from the parent's main thread.
Only call child_info_fork::alloc_stack for the latter case on 64 bit.
Slightly rearrange moving rsp and rbp to new stack and document how.
Revert 32 bit wow64 handling to its former self.
* miscfunc.cc (create_new_main_thread_stack): Take a commitsize
parameter and use it if it's not 0. Don't set _main_tls here, it's
done in the caller _dll_crt0 anyway. Return stackbase - 16 bytes,
rather than stacklimit (which was very wrong anyway).
* miscfuncs.h (create_new_main_thread_stack): Accommodate declaration
to aforementioned change.
* wincap.h (wincaps::has_3264_stack_broken): Remove element.
* wincap.cc: Ditto, throughout.
* wow64.cc: Semi-revert to pre-12743c2d5d2721f3a80b4d7671a349be03c1f520
but keep architecture-agnostic type changes intact. Fix formatting.
* wow64.h: Revert to pre-12743c2d5d2721f3a80b4d7671a349be03c1f520.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* include/sys/cygwin.h (CCP_PROC_CYGDRIVE): New flag.
* mount.cc (mount_info::cygdrive_posix_path): Take flag values rather
than just a trailing_slash_p bool. Emit /proc/cygdrive path if
CCP_PROC_CYGDRIVE flag is given.
(mount_info::conv_to_posix_path): Take flag values rather than just
a keep_rel_p bool. Rename _p variables. Print flag value as hex in
debug_printf. Call cygdrive_posix_path with flag values.
* mount.h (mount_info::cygdrive_posix_path): Accommodate above change
in declaration.
(mount_info::conv_to_posix_path): Ditto.
* fhandler_process.cc (format_process_exename): Accommodate change to
mount_info::conv_to_posix_path.
* path.cc (cygwin_conv_path): Ditto.
* cygpath.cc (absolute_flag): Initialize to CCP_RELATIVE to simplify
expressions.
(cygdrive_flag): New global flag.
(long_options): Add --proc-cygdrive option.
(options): Add -U option.
(usage): Add description for -U option.
(do_sysfolders): Or cygdrive_flag to cygwin_conv_path call.
(do_pathconv): Simply or absolute_flag to conv_func. Or
cygdrive_flag to conv_func.
(do_options): Initalize absolute_flag to CCP_RELATIVE. Initialize new
cygdrive_flag. Set absolute_flag to CCP_ABSOLUTE on -a. Set
cygdrive_flag to CCP_PROC_CYGDRIVE on -U.
* new-features.xml (ov-new2.4): Document cygpath -U option.
* utils.xml (cygpath): Ditto.
* path.xml (func-cygwin-path): Add CCP_PROC_CYGDRIVE description.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* dcrt0.cc (dll_crt0_0): On 64 bit, set wow64_needs_stack_adjustment
if not started from a 64 bit process.
(_dll_crt0): Enable wow64_needs_stack_adjustment branch on 64 bit
as well. Remove 64 bit only code. Introduce CREATE_STACK and
FIX_STACK macros to conditionalize the code. Rearrange and
partially rewrite comments.
* wincap.h (wincaps::has_3264_stack_broken): New element.
* wincap.cc: Implement above element throughout.
(wincapc::init): Set has_3264_stack_broken to false on 32 bit.
* wow64.cc: Enable functionality on 64 bit architecture, except for
wow64_revert_to_original_stack. Enhance comments to explain.
(wow64_eval_expected_main_stack): Make 64 bit clean.
(wow64_test_for_64bit_parent): Ditto.
* wow64.h: Export wow64_revert_to_original_stack on 32 bit only,
everything else on all architectures.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_process.cc (thread_info::thread_info): Accommodate the fact
that TEBs take two pages.
(thread_info::fill_if_match): Rewrite the method for post W10 1511 TEB
detection.
(format_process_maps): Add a state member to region. Fix the code
to handle PEB/TEB region since W10 1511.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_process.cc (heap_info::fill_if_match): Return NULL, not 0.
(thread_info::fill_if_match): Ditto.
(thread_info::fill_if_match): New method to extract TEB info from
PEB/TEB region since W10 1511.
(format_process_maps): Drop outdated FIXME comment. Add code to handle
PEB/TEB region since W10 1511.
* mmap.cc (posix_madvise): Align comment to new W10 1511 version.
* wincap.h (wincaps::has_new_pebteb_region): New element.
* wincap.cc: Implement above element throughout.
(wincap_10_1511): New global wincaps to support Windows 10 since 1511.
(wincapc::init): Use wincap_10_1511 for W10 builds >= 10586.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* child_info.h (struct child_info): Add member from_main.
* fork.cc (frok::child): Check from_main rather than stackaddr.
(frok::parent): Set ch.from_main if running in the main thread.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* child_info.h (CURR_CHILD_INFO_MAGIC): Align to below change.
(class child_info_fork): Rename stacktop to stacklimit. Rename
stackbottom to stackbase. Accommodate name change throughout Cygwin.
Rephrase comments to be clearer.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* cygtls.h (_tlsbase): Remove. Replace throughout with
NtCurrentTeb()->Tib.StackBase.
(_tlstop): Remove. Replace throughout with
NtCurrentTeb()->Tib.StackLimit.
* dcrt0.cc (child_info_fork::alloc_stack): Move definition of local
teb variable up to be used throughout.
* include/cygwin/config.h (__getreent): Use inline function on both
architectures.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* uinfo.cc (pwdgrp::fetch_account_from_windows): Only create 1-5-32-x
SIDs from ids for x <= 999.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* sec_acl.cc (get_posix_access): In case owner SID == group SID, when
encountering the group entry, change the value of `id' accordingly.
Explain why.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* cygtls.h (_cygtls::wait_signal_arrived): Renamed from
set_signal_arrived.
(_cygtls::set_signal_arrived): New function signalling signal_arrived.
(_cygtls::reset_signal_arrived): Don't reset will_wait_for_signal.
(_cygtls::unwait_signal_arrived): New function only resetting
will_wait_for_signal.
(class wait_signal_arrived): Rename from set_signal_arrived.
Accommodate name change throughout Cygwin.
(wait_signal_arrived::~wait_signal_arrived): Call
_cygtls::unwait_signal_arrived. Add comment.
* cygserver_ipc.h (ipc_set_proc_info): Fetch signal_arrived handle
via call to _cygtls::get_signal_arrived.
* exceptions.cc (_cygtls::interrupt_setup): Signal signal_arrived via
call to _cygtls::set_signal_arrived.
(_cygtls::handle_SIGCONT): Ditto.
* fhandler_socket.cc (fhandler_socket::wait_for_events): Generate
WSAEVENT array prior to entering wait loop. Add cancel event object
if available. Remove calls to pthread_testcancel and just call
pthread::static_cancel_self if the cancel event object is signalled.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* nlsfuncs.cc (setlocaleinfo): New macro calling __setlocaleinfo.
(__setlocaleinfo): New function to set a locale-specific character
to an explicit wchar_t value.
(__set_lc_numeric_from_win): Handle fa_IR and ps_AF locales to return
same decimal point and thousands separator characters as on Linux.
(__set_lc_monetary_from_win): Ditto for monetary characters.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* sec_acl.cc (get_posix_access): Skip merging permissions if current
user has rwx permissions anywa, or if the sum of all group and other
permissions is less than or equal to the user's permissions.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* sec_acl.cc (get_posix_access): Fix computation of effective user
permissions to handle current user, not only the file owner.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_tty.cc (fhandler_pty_slave::open): Add S_IFCHR flag
in call to create_object_sd_from_attribute.
(fhandler_pty_slave::fstat): Ditto in call to get_object_attribute.
(fhandler_pty_slave::fchmod): Add an orig_mode flag and ditto for
both calls.
(fhandler_pty_master::setup): Ditto in call to
create_object_sd_from_attribute.
* security.cc (get_object_attribute): Never add S_IFCHR to mode
here. Let the caller decide.
(create_object_sd_from_attribute): Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* security.h (authz_get_user_attribute): Declare bool.
* sec_helper.cc (authz_ctx::get_user_attribute): Make bool method.
Set S_IxOTH bits in returned attributes rather than S_IxUSR bits.
(authz_get_user_attribute): Make bool function.
* sec_acl.cc (get_posix_access): Introduce cygsid array to keep
track of all SIDs in the ACL. Move AuthZ calls into !new_style
permission post processing. When not using AuthZ, use
CheckTokenMembership to collect group permissions.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_disk_file::fchmod): Disable
deviation from POSIX 1003.1e in terms of GROUP_OBJ/CLASS_OBJ
permissions. Follow POSIX 1003.1e again. Keep old code in
for future reference.
* sec_acl.cc: Accommodate changes in ACE creation in leading
comment.
(set_posix_access): Fix user deny ACE creation. Split group
deny ACE creation into two steps, one to reflect CLASS_OBJ,
the other to reflect OTHER_OBJ.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
- New, unified implementation of POSIX permission and ACL handling. The
new ACLs now store the POSIX ACL MASK/CLASS_OBJ permission mask, and
they allow to inherit the S_ISGID bit. ACL inheritance now really
works as desired, in a limited, but theoretically equivalent fashion
even for non-Cygwin processes.
To accommodate Windows default ACLs, the new code ignores SYSTEM and
Administrators group permissions when computing the MASK/CLASS_OBJ
permission mask on old ACLs, and it doesn't deny access to SYSTEM and
Administrators group based on the value of MASK/CLASS_OBJ when
creating the new ACLs.
The new code now handles the S_ISGID bit on directories as on Linux:
Setting S_ISGID on a directory causes new files and subdirs created
within to inherit its group, rather than the primary group of the user
who created the file. This only works for files and directories
created by Cygwin processes.
2015-05-29 Corinna Vinschen <corinna@vinschen.de>
Reapply POSIX ACL changes.
* utils.xml (setfacl): Show new option output.
(getfacl): Show new option output.
* sec_acl.cc (get_posix_access): Check for Cygwin "standard" ACL.
Apply umask, if so. Align comments.
* security.cc (set_created_file_access): Fix permission masking by
incoming requested file mode.
* sec_acl.cc (set_posix_access): Apply mask only in terms of execute bit
for SYSTEM and Admins group.
* sec_acl.cc (set_posix_access): Don't create DENY ACEs for USER and
GROUP entries if they are the same as USER_OBJ or GROUP_OBJ.
* fhandler.h (fhandler_pty_slave::facl): Add prototype.
* fhandler_tty.cc (fhandler_pty_slave::facl): New method.
(fhandler_pty_slave::fchown): Fix uid/gid handling.
* sec_acl.cc (set_posix_access): Drop superfluous class_idx variable.
Simplify and move around code in a few places. To improve ACL
readability, add r/w permissions to Admins ACE appended to pty ACL.
Add comment to explain Windows ACE Mask filtering being in the way of
creating a real CLASS_OBJ.
(get_posix_access): Fake CLASS_OBJ for ptys. Explain why.
* security.cc (get_object_attribute): Add S_IFCHR flag to attributes
when calling get_posix_access.
* sec_acl.cc (set_posix_access): Move merging group perms into owner
perms in case of owner == group after mask has been computed. Take
mask into account when doing so to avoid unnecessary ACCESS_DENIED_ACE.
* sec_acl.cc (get_posix_access): Only set saw_group_obj flag if we saw
the ACCESS_ALLOWED_ACE.
* fhandler_disk_file.cc (fhandler_disk_file::fchmod): Deliberatly
set GROUP_OBJ and CLASS_OBJ perms to new group perms. Add comment
to explain why.
* security.cc (set_created_file_access): Ditto.
* sec_acl.cc (set_posix_access): Replace previous patch. Return
EINVAL if uid and/or guid is invalid and not backed by an actual
Windows account.
* sec_acl.cc (set_posix_access): Workaround owner/group SIDs being NULL.
* sec_acl.cc (set_posix_access): Handle files with owner == group.
Rephrase switch statement checking against unfiltered a_type value.
(get_posix_access): Handle files with owner == group.
* sec_acl.cc (get_posix_access): Don't use GROUP_OBJ access to fix up
CLASS_OBJ mask on old-style ACLs. Fix a comment.
* sec_acl.cc (set_posix_access): Always make sure Admins have
WRITE_DAC and WRITE_OWNER permissions.
* security.h (create_object_sd_from_attribute): Drop handle parameter
from prototype.
* security.cc (create_object_sd_from_attribute): Drop handle parameter.
Just create the standard POSIXy security descriptor.
(set_object_attribute): Accommodate dropped paramter in call to
create_object_sd_from_attribute.
* fhandler_tty.cc: Ditto, throughout.
* fhandler_disk_file.cc (fhandler_disk_file::fchmod): Fix typo in
mask computation.
* fhandler.cc (fhandler_base::open_with_arch): Call open with mode
not umasked.
(fhandler_base::open): Explicitely umask mode on NFS here. Call new
set_created_file_access rather than set_file_attribute.
* fhandler_disk_file.cc (fhandler_disk_file::fchmod): Reimplement
setting permissions on filesystems supporting ACLs using the new
set_posix_access call.
(fhandler_disk_file::fchown): Ditto.
(fhandler_disk_file::mkdir): Call new set_created_file_access rather
than set_file_attribute.
* fhandler_socket.cc (fhandler_socket::bind): Don't umask here. Add
WRITE_OWNER access to allow writing group in case of SGID bit set.
Call new set_created_file_access rather than set_file_attribute.
* path.cc (symlink_worker): Call new set_created_file_access rather
than set_file_attribute.
* sec_acl.cc (searchace): Un-staticize.
(set_posix_access): New, complementary functionality to
get_posix_access.
(setacl): Implement in terms of get_posix_access/set_posix_access.
(get_posix_access): Add handling for just created files requiring
their first Cygwin ACL. Fix new_style recognition. Handle SGID
bit. For old-style ACLs, ignore SYSTEM and Administrators when
computing the {DEF_}CLASS_OBJ perms.
* security.cc (get_file_sd): Revamp comment. Change and (hopefully)
speed up inheritance processing for just created files.
(alloc_sd): Remove.
(set_security_attribute): Call set_posix_access instead of alloc_sd.
(get_object_attribute): Fix return value.
(create_object_sd_from_attribute): Call set_posix_access instead of
alloc_sd.
(set_file_attribute): Remove.
(set_created_file_access): New function implemented in terms of
get_posix_access/set_posix_access.
* security.h (set_file_attribute): Remove prototype.
(set_created_file_access): Add prototype.
(searchace): Ditto.
(set_posix_access): Ditto.
* syscalls.cc (open): Call open_with_arch with mode not umasked.
* sec_acl.cc: Change preceeding comment explaining new-style ACLs.
Describe how to generate deny ACEs in more detail. Accommodate the
fact that a NULL deny ACE is used for {DEF_}CLASS_OBJ, rather than
a special Cygwin ACE. Improve further comments.
(CYG_ACE_NEW_STYLE): Define.
(get_posix_access): Change from Cygwin ACE to NULL deny ACE. Fix
CLASS_OBJ handling to generate CLASS_OBJ and DEF_CLASS_OBJ from a single
NULL deny ACE if the inheritance flags say so.
* sec_helper.cc (well_known_cygwin_sid): Remove.
* security.h (well_known_cygwin_sid): Drop declaration.
* sec_acl.cc (CYG_ACE_ISBITS_TO_WIN): Fix typo.
(get_posix_access): Rename index variable from i to idx. Define only
once at top level.
* security.cc (add_access_allowed_ace): Drop unused parameter "offset".
Accommodate throughout.
(add_access_denied_ace): Ditto.
* sec_acl.cc: Accommodate above change throughout.
* security.h (add_access_allowed_ace): Adjust prototype to above change.
(add_access_denied_ace): Ditto.
* sec_acl.cc (get_posix_access): Handle multiple ACEs for the
owner and primary group of the file. Handle the default primary
group ACE as DEF_GROUP_OBJ entry if the directory has the S_ISGID bit
set. Add comments. Minor code rearrangements.
Preliminary read side implementation of new permission handling.
* acl.h (MAX_ACL_ENTRIES): Raise to 2730. Add comment to explain.
* sec_acl.cc: Add leading comment to explain new ACL style.
Add definitions and macros to use for bits in new Cygwin ACL.
(DENY_RWX): New mask value for all temporary deny bits.
(getace): Add bool parameter to decide when leaving all bits intact,
rather than filtering them per the already set bits.
(get_posix_access): New function, taking over functionality to read
POSIX ACL from SECURITY_DESCRIPTOR.
(getacl): Just call get_posix_access.
* sec_helper.cc (well_known_cygwin_sid): Define.
* security.cc (get_attribute_from_acl): Remove.
(get_info_from_sd): Remove.
(get_reg_sd): Call get_posix_access instead of get_info_from_sd.
(get_file_attribute): Ditto.
(get_object_attribute): Ditto.
* security.h (well_known_cygwin_sid): Declare.
(get_posix_access): Add prototype.
* Throughout, use simpler ACE macros from Windows' accctrl.h.
* getfacl.c (main): Special-case SYSTEM and Admins group. Add comments.
* setfacl.c: Align more to Linux tool.
(delacl): New function to delete acl entries only.
(modacl): Drop delete functionality. Add handling of recomputing the
mask and default mask values.
(delallacl): Rename from delacl.
(setfacl): Call delacl in Delete case. Call delallacl in DeleteAll
and DeleteDef case.
(usage): Accommodate new options. Rearrange and rephrase slightly.
(longopts): Emit 'x' in --delete case. Add --no-mask and --mask
options.
(opts): Add -x and -n options.
(main): Handle -d and -x the same. Handle -n and --mask options.
Drop handling for -r option.
* getfacl.c (usage): Align more closely to Linux version. Add new
options -c, -e, -E. Change formatting to accommodate longer options.
(longopts): Rename --noname to --numeric. Keep --noname for backward
compatibility. Add --omit-header, --all-effective and --no-effective
options.
(opts): Add -c, -e and -E option.
(main): Handle new -c, -e, and -E options.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* path.cc (symlink_native): Don't generate native symlink targeting
Cygwin special file. Inform the caller.
(symlink_worker): Don;t bail out in WSYM_nativestrict case if the
target is a Cygwin special file.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* init.cc (munge_threadfunc): Don't call NtQueryInformationThread with
ThreadQuerySetWin32StartAddress info class on XP 64 and Server 2003 64.
It crashes.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* sigproc.cc (pending_signals::clear): Yet another fix to fix the fix.
Actually iterate over the list of pending signals even if there's a
signal which doesn't have to be cleared. Other than that, revert loop
to it's former self as a while loop.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* nlsfuncs.cc (__get_lcid_from_locale): Handle LocaleNameToLCID
returning LOCALE_CUSTOM_UNSPECIFIED instead of failing in case of
an unsupported locale on Windows 10.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* signal.cc (sigwait): Fix return value to reflect errno in case of
error according to POSIX. Never return EINTR.
* thread.cc (pthread_kill): Return errno if sig_send failed.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* init.cc (munge_threadfunc): Check that we're actually replacing
the correct original function address on the stack.
* ntdll.h (enum _THREADINFOCLASS): Add ThreadQuerySetWin32StartAddress.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* strfuncs.cc (sys_cp_wcstombs): Always return number of multibytes
without trailing NUL as the documentation implies. Throughout Cygwin,
fix usage to align to this pattern.
* fhandler_process.cc (format_process_winexename): Drop trailing NUL
and LF from output.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* thread.cc (pthread_getattr_np): Fix memory leak, remove usage of
malloc for small local buffer.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* flock.cc (lockf_t::create_lock_obj_attr): Add buffer parameter.
Call _everyone_sd with buffer argument from caller rather than
everyone_sd with locally allocated stack buffer.
(lockf_t::create_lock_obj): Call create_lock_obj_attr only once
outside the loop and with additional buffer argument.
(lockf_t::open_lock_obj): Call create_lock_obj_attr with additional
buffer argument.
* include/sys/unistd.h (_SC_LEVEL*): Add cache-related variables as
on Linux.
* fhandler_proc.cc (format_proc_cpuinfo): Fetch cache information
from new cache functions in sysconf.cc, get_cpu_cache_intel and
get_cpu_cache_amd.
* sysconf.cc (__nt_query_system): New local helper.
(get_nproc_values): Utilize __nt_query_system on pre-Windows 7 systems.
Use GetLogicalProcessorInformationEx otherwise to handle more than
64 CPUs. Only handle _SC_NPROCESSORS_CONF and _SC_NPROCESSORS_ONLN.
(get_phys_pages): New helper to handle _SC_PHYS_PAGES.
(cpuid2_cache_descriptor): New array to map Intel CPUID 2 descriptor
values to cache type, cache size, associativity and linesize.
(cpuid2_cache_desc_compar): Comparision function for bsearch over
cpuid2_cache_descriptor.
(get_cpu_cache_intel_cpuid2): New function to fetch cache info from
Intel CPUID 2.
(get_cpu_cache_intel_cpuid4): Ditto from Intel CPUID 4.
(get_cpu_cache_intel): New function as CPU-specific entry point.
(assoc): New array to map associativity values from AMD CPUID
0x80000006.
(get_cpu_cache_amd): New function to fetch cache info from AMD CPUIDs
0x80000005 and 0x80000006.
(get_cpu_cache): New function to fetch cache info.
(sca): Call get_phys_pages if _SC_PHYS_PAGES is requested. Call
get_cpu_cache for new _SC_* cache requests.
(SC_MAX): Set to _SC_LEVEL4_CACHE_LINESIZE.
(get_phys_pages(void)): Call get_phys_pages(int).
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* new-features.xml (ov-new2.3): Document sysconf cache addition.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_proc.cc (format_proc_cpuinfo): Only fetch group relations,
we don't need anything else.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* winsup.h (_WIN32_WINNT): Set to 0x0a00 for Windows 10.
(WINVER): Ditto. Remove outdated comment.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
System DLLs are always first in the DLL search order so
http://www.microsoft.com/technet/security/advisory/2269637.mspx
doesn't apply for them.
* autoload.cc (std_dll_init): Revert using full paths to system DLLs.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This fixes a long-standing problem when GetProcAddress fails
to load a function. The noload code calls SetLastError on
i686 without saving the edx register. Starting with Windows 7,
SetLastError apparently uses $edx and the register is set to
0x00000000 on return. So the subsequent `jmp *$edx' in noload
supposed to return to the caller, actually jumps to address NULL,
which results in a SEGV.
* autoload.cc (noload): i686 only: Save and restore $edx when calling
SetLastError to avoid clobbering return address stating with Windows 7.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* grp.cc (internal_getgrfull): Drop asking caches. Explain why.
(internal_getgroups): In case we're not utilizing the Windows account
DBs, don't call LsaLookupSids but iterate over the group SIDs in the
token and call internal_getgrsid for each of them. Explain why.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): Rearrange
to fall back to myself uid/gid in case we don't utilize Windows
account DBs, just as prior to 1.7.34.
* sec_helper.cc (cygpsid::get_id): Disable Samba user/group mapping per
RFC2307 if we're not utilizing Windows account DBs.
* security.cc (convert_samba_sd): Revert previous patch.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
When globals.cc has CRLF line endings, winsup.h is not removed, and
compilation fails for duplicate definitions.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler.cc (fhandler_base_overlapped::raw_write): When performing
nonblocking I/O, copy user space data into own buffer. Add longish
comment to explain why.
* fhandler.h (fhandler_base_overlapped::atomic_write_buf): New member.
(fhandler_base_overlapped::fhandler_base_overlapped): Initialize
atomic_write_buf.
(fhandler_base_overlapped::fhandler_base_overlapped): New destructor,
free'ing atomic_write_buf.
(fhandler_base_overlapped::copyto): Set atomic_write_buf to NULL in
copied fhandler.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): Only try
to map user and group info per RFC2307 if account info is fetched
from Windows account DB.
(convert_samba_sd): Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* security,cc (get_attribute_from_acl): Merge all group perms into
user perms if user is member of group.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* autoload.cc (GetLogicalProcessorInformationEx): Import.
(SetThreadGroupAffinity): Import.
* fhandler_proc.cc (add_size): New macro.
(get_msb): New inline function.
(mask_bits): Ditto.
(format_proc_cpuinfo): Drop handling of old CPUs. Check if we're
running on a OS version supporting porcessor groups. If so, use
SetThreadGroupAffinity to set thread affinity. Improve cache info
to include 3rd level cache on Intel CPUs. Improve multi core info.
* wincap.h (wincaps::has_processor_groups): New element.
* wincap.cc: Implement above element throughout.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
https://cygwin.com/ml/cygwin/2015-07/msg00344.html:
RtlFillMemory and RtlCopyMemory only work for size values
up to 2GB. Fix this problem by using NetBSD code for
memset and memcpy. Add entry points for memmove, wmemset,
wmemmove, wmemcpy. Thanks to Roman Petrovski
<RPetrovski@illumina.com> for pointing this out.
* miscfuncs.cc (memset): x86_64 only: Implement in assembler.
(memmove,memcpy): x86_64 only: Ditto.
(wmemmove,wmemcpy): x86_64 only: Ditto.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* cygtls.h: Include cygtls_padsize.h and define CYGTLS_PADSIZE there.
* cygtls_padsize.h: New file. Define CYGTLS_PADSIZE.
* environ.cc (parse_options): Fix NULL pointer access.
* init.cc (threadfunc_fe): Do not force stack align on x86_64.
* strace.cc (main2): Rename from main.
(main): Make room for _cygtls area on stack and just call main2. Add
comment to explain why.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
glibc's tst-makecontext2 testcase uncovered a bug in
__cont_link_context. If the function misses to reserve
shadow space for the calls to setcontext/cygwin_exit,
both functions could overwrite memory beyond the stack
configured in uc_stack.
* exceptions.cc (__cont_link_context): x86_64: align stack and reserve
shadow space for subsequent function calls, otherwise suffer potential
buffer overflow.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* uinfo.cc (cygheap_user::ontherange): Ignore $HOME if it's not
starting with a slash (aka, absolute POSIX Path).
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* libc/include/machine/setjmp.h (siglongjmp): Declare as function on
Cygwin.
(sigsetjmp): Ditto.
(_longjmp): Mark as noreturn function on Cygwin.
* common.din (siglongjmp): Export.
(sigsetjmp): Export.
* gendef: Change formatting of some comments.
(sigsetjmp): Implement.
(siglongjmp): Implement.
(__setjmpex): x86_64 only: Drop entry point.
(setjmp): x86_64 only: Store tls stackptr in Frame now, store MXCSR
and FPUCW registers in Spare, as MSVCRT does.
(longjmp): x86_64 only: Restore tls stackptr from Frame now, restore
MXCSR and FPUCW registers from Spare.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* new-features.xml (ov-new2.2): Document sigsetjmp, siglongjmp.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* dcrt0.cc (initial_env): Reduce size of local path buffers to
PATH_MAX. Allocate debugger_command from process heap.
(init_windows_system_directory): Very early initialize new global
variable global_progname.
* dll_init.cc (dll_list::alloc): Make path buffer static. Explain why.
(dll_list::populate_deps): Use tmp_pathbuf for local path buffer.
* exceptions.cc (debugger_command): Convert to PWCHAR.
(error_start_init): Allocate debugger_command and fill with wide char
strings. Only allocate if NULL.
(try_to_debug): Just check if debugger_command is a NULL pointer to
return. Drop conversion from char to WCHAR and drop local variable
dbg_cmd.
* globals.cc (global_progname): New global variable to store Windows
application path.
* pinfo.cc (pinfo_basic::pinfo_basic): Just copy progname over from
global_progname.
(pinfo::status_exit): Let path_conv create the POSIX path to
avoid local buffer.
* pseudo_reloc.cc (__report_error): Utilize global_progname, drop local
buffer.
* smallprint.cc (__small_vsprintf): Just utilize global_progname for
%P format specifier.
(__small_vswprintf): Ditto.
* strace.cc (PROTECT): Change to reflect x being a pointer. Reformat.
(CHECK): Ditto. Reformat.
(strace::activate): Utilize global_progname, drop local buffer.
Fix formatting.
(strace::vsprntf): Reduce size of local progname buffer to NAME_MAX.
Copy and, if necessary, convert only the last path component to
progname.
(strace_buf_guard): New muto.
(buf): New static pointer.
(strace::vprntf): Use buf under strace_buf_guard lock only. Allocate
buffer space for buf on Windows heap.
* wow64.cc (wow64_respawn_process): Utilize global_progname, drop
local path buffer.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc (__unwind_single_frame): Define empty macro on i686.
(_cygtls::call_signal_handler): Try to make sure signal context makes
sense in case we're generating context here. Add comment to explain.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc (__unwind_single_frame): Move up in file to be
accessible from other places. Move comment to getcontext.
(stack_info::walk): Call __unwind_single_frame in 64 bit case. Fix
preceeding comment.
(myfault_altstack_handler): Call __unwind_single_frame.
(getcontext): Give comment from __unwind_single_frame a new home.
(swapcontext): Fix comment.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
x86_64 only:
* cygtls.cc (san::leave): Restore _my_tls.andreas.
* cygtls.h (class san): Add _clemente as in 32 bit case. Add ret and
frame members.
(san::san): Handle _my_tls.andreas as on 32 bit. Take parameter and
write it to new member ret. Store current stack pointer in frame.
(san::~san): New destructor to restore _my_tls.andreas.
(__try): Use __l_except address as parameter to san::san.
* dcrt0.cc (dll_crt0_0): Add myfault_altstack_handler as vectored
continuation handler.
* exception.h (myfault_altstack_handler): Declare.
* exceptions.cc (myfault_altstack_handler): New function. Explain what
it's good for.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* miscfuncs.cc (struct pthread_wrapper_arg): Add member guardsize.
(pthread_wrapper): Set thread stack guarantee according to guardsize.
Tweak assembler code so that $rax/$eax is not required by GCC to
prepare the wrapper_arg value.
(CygwinCreateThread): Fix deadzone handling. Drop setting a "POSIX"
guardpage (aka page w/ PAGE_NOACCESS). Always use Windows guard
pages instead. On post-XP systems (providing SetThreadStackGuarantee)
always set up stack Windows like with reserved/commited areas and
movable guard pages. Only on XP set up stack fully commited if the
guardpage size is not the default system guardpage size.
Fill out pthread_wrapper_arg::guardsize. Improve comments.
* resource.cc: Implement RSTACK_LIMIT Linux-like.
(DEFAULT_STACKSIZE): New macro.
(DEFAULT_STACKGUARD): Ditto.
(rlimit_stack_guard): New muto.
(rlimit_stack): New global variable holding current RSTACK_LIMIT values.
(__set_rlimit_stack): Set rlimit_stack under lock.
(__get_rlimit_stack): Initialize rlimit_stack from executable header
and return rlimit_stack values under lock.
(get_rlimit_stack): Filtering function to return useful default
stacksize from rlimit_stack.rlim_cur value.
(getrlimit): Call __get_rlimit_stack in RLIMIT_STACK case.
(setrlimit): Call __set_rlimit_stack in RLIMIT_STACK case.
* thread.cc (pthread::create): Fetch default stacksize calling
get_rlimit_stack.
(pthread_attr::pthread_attr): Fetch default guardsize calling
wincap.def_guard_page_size.
(pthread_attr_getstacksize): Fetch default stacksize calling
get_rlimit_stack.
* thread.h (PTHREAD_DEFAULT_STACKSIZE): Remove.
(PTHREAD_DEFAULT_GUARDSIZE): Remove.
(get_rlimit_stack): Declare.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* autoload.cc (SetThreadStackGuarantee): Import.
* cygtls.h (struct _cygtls): Replace thread_context with a ucontext_t
called context.
* exceptions.cc (exception::handle): Exit from process via signal_exit
in case sig_send returns from handling a stack overflow SIGSEGV.
Explain why.
(dumpstack_overflow_wrapper): Thread wrapper to create a stackdump
from another thread.
(signal_exit): Fix argument list to reflect three-arg signal handler.
In case we have to create a stackdump for a stack overflow condition,
do so from a separate thread. Explain why.
(sigpacket::process): Don't run signal_exit on alternate stack.
(altstack_wrapper): Wrapper function to do stack correction when
calling the signal handler on an alternate stack to handle a stack
overflow. Make sure to have lots of comments.
(_cygtls::call_signal_handler): Drop local context variable to reduce
stack pressure. Use this->context instead. Change inline assembler
to call altstack_wrapper.
(_cygtls::signal_debugger): Accommodate aforementioned change to
struct _cygtls.
* tlsoffset.h: Regenerate.
* tlsoffset64.h: Regenerate.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fork.cc (frok::parent): Set stacktop value based on requested stack
pointer value in child. Explain why.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc (_cygtls::call_signal_handler): Drop manipulating
thread's ss_flags here. It's not safe against longjmp.
* signal.cc (sigaltstack): Check if we're running on the alternate
stack and set ss_flags returned in oss to SS_ONSTACK.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* include/cygwin/signal.h: Revert to define MINSIGSTKSZ and SIGSTKSZ
here with bigger values to allow _cygtls to reside on signal stack,
should it turn out to be required at one point.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* resource.cc (getrlimit): Fix values returned by RLIMIT_STACK.
Explain why this had to be changed.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc (_cygtls::call_signal_handler): Drop pushing a register
on the original stack, it confuses GCC. Rearrange the assembler code
so that $rax/$eax is not used by GCC to prepare an argument value.
Use $rax/$eax without saving. Drop clearing $rbp/$epb.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc (_cygtls::call_signal_handler): Drop subtracting 16
bytes from the alternate stack, it's not necessary. Safe all clobbered
registers. Safe one on the orignal stack, the others on the alternate
stack on both platforms.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Yaakov Selkowitz
Corinna Vinschen
Jon Turney
Johannes Schindelin
Erik M. Bray
Sebastian Huber
Ken Brown
Michael Haubenwallner
David Wohlferd
Ray Donnelly
Erik Bray
Eric Blake
Takashi Yano
John Hood
Peter Foley
Joel Sherrill
Thomas Wolff
Václav Haisman
Mark Geisert
Qian Hong
Brian Inglis
Orgad Shaneh