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>
Fedora installs docbook2texi under the name db2x_docbook2texi
Other distros and Cygwin install docbook2texi under the name docbook2x-texi
Add a configure test to find either.
2015-07-05 Jon Turney <jon.turney@dronecode.org.uk>
* configure.ac: Add check for DOCBOOK2XTEXI
* configure: Regenerate.
* Makefile.in (DOCBOOK2XTEXI): Use.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* 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>
Update list of pre-requisites, everything else is obsolete.
Future work: Ensure that the list of pre-requisites in FAQ 6.21 "How do I build
Cygwin" remains synchronized with this list.
2015-06-22 Jon Turney <jon.turney@dronecode.org.uk>
* README: Update.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
2015-06-22 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in (FAQ_SOURCES): Remove and generate with xidepend.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
v2:
intro.1 and cygwin.1 are identical. Make cygwin.1 a link to intro.1
Update dates in static man pages
v3:
Use doclifter to convert intro.[13] to DocBook XML
Clean up markup and fix a couple of spelling mistakes.
Build and install manpages from XML
v4:
Update to refer to GPLv3+, SUSv4
Simplify ulinks where anchor text is the same as the URL
2015-06-22 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in (intro2man.stamp): Add.
* intro.xml: New file.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
v2:
Updated to use docbook2x-texi not docbook2texi, since source is now docbook XML.
Tweak DocBook XML so info directory entry has a description.
v3:
Use a custom charmap to handle ®
v4:
Proper build avoidance
texinfo node references may not contain ':', so provide alternate text for a few
xref targets
2015-06-22 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in (install-info, cygwin-ug-net.info)
(cygwin-api.info): Add.
* cygwin-ug-net.xml: Add texinfo-node.
* cygwin-api.xml: Ditto.
* ntsec.xml (db_home): Add texinfo-node for titles containing a
':' which are the targets of an xref.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* 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>
Fix a cut and paste error in the command to create the man3 install directory,
added in 94f16969
2015-06-19 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in (install-man): Fix command to create man3 install
directory.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
2015-06-17 Jon Turney <jon.turney@dronecode.org.uk>
* man.xsl: New file.
* Makefile.in (utils2man.stamp, api2man.stamp): Use it.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Use 'xmlto man' to make manpages for utils
This will generate multiple .1 files as an output, but we don't know what they
will be called, so use a timestamp for build avoidance
2015-06-17 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in (api2man.stamp): Add rules to build and install
manpages for cygwin-api.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Convert cygwin-api from using a sect2 element to using a refentry element for
each function. This makes it possible to generate manpage-style output for
those elements.
Note that the chunked html now generates a page for each function, rather than
one containing all functions.
Also:
Remove pointless and incorrect date
Move introductory paragraph from the first section to the start of the chapter
Add a funcsynopsisinfo element with the header file to be included to each
function prototype
Remove extern "C" which doesn't process into all formats successfully
2015-06-17 Jon Turney <jon.turney@dronecode.org.uk>
* cygwin-api.xml: Move introductory paragraph here.
* logon-funcs.xml: Convert from using a sect2 element to using a
refentry element for each function.
* misc-funcs.xml: Ditto.
* path.xml: Ditto.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Since K&R style prototypes appear to be the default for HTML and FO, customize
the stylesheets rendering of funcsynopsis elements to generate ANSI style
prototypes instead.
2015-06-17 Jon Turney <jon.turney@dronecode.org.uk>
* fo.xsl: Render funcsynopsis elements as ANSI style function
prototypes.
* html.xsl: Ditto.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
For clarity, rename cygwin.xsl as html.xsl, because that's what it is
2015-06-17 Jon Turney <jon.turney@dronecode.org.uk>
* html.xsl: Renamed from cygwin.xsl.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Use 'xmlto man' to make manpages for utils
(docbook2x-man could also be used, but since we already use xmlto...)
This will generate multiple .1 files as an output, but we don't know what they
will be called, so use a timestamp file for build avoidance when the
dependencies haven't changed.
2015-06-12 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in (install-man, utils2man.stamp): Add rules to build
and install manpages for utils.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Convert utils.xml from using a sect2 element to using a refentry element for
each utility program. This makes it possible to generate manpage-style output
for those elements.
Note that the chunked html now generates a page for each utility, rather than
one containing all utilities.
A small customization to TOC generation for HTML and PDF is needed to ensure
that it appears as before, containing an entry for each utility command.
Future work: synopsis and options sections could use more detailed markup than
just wrapping the whole thing in <screen>
2015-06-12 Jon Turney <jon.turney@dronecode.org.uk>
* utils.xml : Convert from using a sect2 element to using a
refentry element for each utility program.
* cygwin.xsl: Customize autotoc to include refentries.
* fo.xsl: Ditto.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
The cygwin-ug-net-nochunks.html.gz target does not ensure that the
cygwin-ug-net/ directory exists, so it can fail if run on it's own, or if the
cygwin-ug-net/cygwin-ug-net.html target has not yet created it in a parallel
make.
2015-06-12 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in (cygwin-ug-net/cygwin-ug-net-nochunks.html.gz):
Ensure cygwin-ug-net directory exists.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Change xidepend to create a variable containing all the XIncluded sources, which
can be used as a dependency, rather than writing the dependency target itself.
Future work: Makefile.dep should depend on xidepend, but xidepend should not be
passed to itself.
2015-06-12 Jon Turney <jon.turney@dronecode.org.uk>
* xidepend: Write a Makefile fragment defining variables
containing all the XIncluded sources, rather than a dependency on
those sources.
* Makefile.in: Use that variable to express the dependency.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
fo.xsl doesn't seem to be used since c2f50c40 switched back from xsltproc to
xmlto
2015-06-12 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in (cygwin-ug-net/cygwin-ug-net.pdf)
(cygwin-api/cygwin-api.pdf): Use fo.xsl to customized DocBook
XML->PDF conversion.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Remove the inconsistent .exe suffix in strace and umount usage lines.
Tidy up some trailing whitespace.
Tabs inside <screen> are not consistently formatted by all formatters, replace
with spaces.
Remove pointlesss and incorrect date
2015-06-12 Jon Turney <jon.turney@dronecode.org.uk>
* cygwin-ug-net.xml: Remove incorrect unused date.
* utils.xml : Remove .exe suffix inconsistently added in a few
places. Tidy up some trailing whitespace.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
It seems that xidepend doesn't work correctly if we are ./configure'd using a
relative pathname to the srcdir:
$ make
cd ../../../../src/winsup/doc && ./xidepend ../../../../src/winsup/doc/cygwin-ug-net.xml ../../../../src/winsup/doc/cygwin-api.xml >"/wip/cygwin/build/x86_64-unknown-cygwin/winsup/doc/Makefile.dep"
grep: ../../../../src/winsup/doc/cygwin-ug-net.xml: No such file or directory
grep: ../../../../src/winsup/doc/cygwin-api.xml: No such file or directory
Although it might be better to fix this by making xidepend use pathnames, rather
than ignoring them and assuming everything is in the current directory...
2015-06-12 Jon Turney <jon.turney@dronecode.org.uk>
* xidepend: Fix to handle relative pathnames.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* fhandler_socket.cc (LOCK_EVENTS): Don't enter critical section with
invalid mutex handle since then socket has been closed.
(UNLOCK_EVENTS): Close critical section.
(fhandler_socket::evaluate_events): Handle calling connect on shutdown
socket.
(fhandler_socket::wait_for_events): Try for pthread_testcancel in case
of WAIT_FAILED. Try to come up with a better errno in case we waited
on an invalid handle.
(fhandler_socket::release_events): Change wsock_mtx and wsock_evt to
NULL under lock to avoid accessing invalid handle.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc (_cygtls::call_signal_handler): Disable enforcing
SA_RESTART in non-main threads to allow returning with EINTR from
system calls.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Not sure if this is wanted, but on a couple of occasions recently I have been
presented with strace output which contains an exception at an address in an
unknown module (i.e. not in the cygwin DLL or the main executable), so here is a
patch which adds some more information, including DLL load addresses, to help
interpret such straces.
v2:
Use NtQueryObject() for HANDLE -> filename conversion
Add new '-e' option to toggle this additional logging
2015-06-07 Jon Turney <jon.turney@dronecode.org.uk>
* strace.cc (proc_child): Log process and thread create and exit,
and DLL load and unload.
(GetFileNameFromHandle): New function.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* ps.cc (main): Widen UID field in long format to accommodate longer
UIDs since Cygwin 1.7.34. Remove Windows 2000 considerations. Fix
comments accordingly.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* pinfo.cc (_pinfo::root): Fake default root for native processes.
(open_commune_proc_parms): New helper function to access process
parameter block.
(_pinfo::cwd): Fetch missing cwd for native processes from processes
parameter block.
(_pinfo::cmdline): Ditto for command line.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This used to be used by cygwin-doc to make a tarball which would be used with a
ssh script to run docbook tools on a linux host since they weren't available on
Cygwin or something crazy like that...
2015-06-04 Jon Turney <jon.turney@dronecode.org.uk>
* Makefile.in: Remove ancient unused rules to make a documentation
tarball.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
An estimate of the size of installing of "hundreds of megabytes" is wildly out
of date. Just remove mention of installing everything, since it is nearly
always not a good idea.
2015-06-01 Jon Turney <jon.turney@dronecode.org.uk>
* ov-ex-unix.xml: Remove unhelpful mention of and inaccurate size
estimate for installing everything.
* ov-ex-win.xml: Ditto.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* path.cc (path_conv::set_nt_native_path): New function.
* path.h (path_conv::set_nt_native_path): Add prototype.
* syscall.cc (try_to_bin): Handle moving files to the recycler
accessed via a local virtual drive (subst). Fix a problem renaming
the file to the unique replacement name on Samba. Align comment.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Corinna Vinschen
Yaakov Selkowitz
Jon TURNEY
Ken Brown
Takashi Yano
Mike DePaulo