diff options
Diffstat (limited to 'open_issues/glibc.mdwn')
| -rw-r--r-- | open_issues/glibc.mdwn | 167 |
1 files changed, 133 insertions, 34 deletions
diff --git a/open_issues/glibc.mdwn b/open_issues/glibc.mdwn index b06b4f9f..31437744 100644 --- a/open_issues/glibc.mdwn +++ b/open_issues/glibc.mdwn @@ -30,14 +30,14 @@ Here's what's to be done for maintaining glibc. <!-- git checkout reviewed -git log --reverse --pretty=fuller --stat=$COLUMNS,$COLUMNS -w -p -C --cc ..sourceware/master +git log --reverse --topo-order --pretty=fuller --stat=$COLUMNS,$COLUMNS -w -p -C --cc ..sourceware/master -i -/^commit |^Merge:|^---$|hurd|linux|gs:|__ASSUME +/^commit |^merge:|^---$|mach[^i]|hurd|linux|gs:|__assume --> -Last reviewed up to the [[Git mirror's d3bd58cf0a027016544949ffd27300ac5fb01bb8 -(2012-11-03) sources|source_repositories/glibc]]. +Last reviewed up to the [[Git mirror's 0323d08657f111267efa47bd448fbf6cd76befe8 +(2013-05-24) sources|source_repositories/glibc]]. * `t/hurdsig-fixes` @@ -221,9 +221,9 @@ Last reviewed up to the [[Git mirror's d3bd58cf0a027016544949ffd27300ac5fb01bb8 b1b2aaf8eb9eed301ea8f65b96844568ca017f8b), `RLIMIT_RTTIME`, `SEEK_DATA` (`unistd.h`), `SEEK_HOLE` (`unistd.h`) `clock_adjtime`, `fallocate`, `fallocate64`, `name_to_handle_at`, - `open_by_handle_at`, `process_vm_readv`, `process_vm_writev`, `sendmmsg`, + `open_by_handle_at`, `process_vm_readv`, `process_vm_writev`, `setns`, `sync_file_range`, [[`mremap`|mremap]] and [[several - `MAP_*`|glibc/mmap]] + `MAP_*`|glibc/mmap]], `PTR_MANGLE`/`PTR_DEMANGLE` (`t/ptrmangle`) Check also the content of `gnu/stubs.h`, which lists all the functions marked as stub which only return `ENOSYS`. @@ -259,7 +259,7 @@ Last reviewed up to the [[Git mirror's d3bd58cf0a027016544949ffd27300ac5fb01bb8 <youpi> so I'd say ignore the error for now, we'll add the declaration - * [[`getcontext`/`setcontext`|t/tls-threadvar]] + * [[t/tls-threadvar]] * `futimesat` @@ -297,7 +297,8 @@ Last reviewed up to the [[Git mirror's d3bd58cf0a027016544949ffd27300ac5fb01bb8 * `sys/timerfd.h` - * `timespec_get` (74033a2507841cf077e31221de2481ff30b43d51) + * `timespec_get` (74033a2507841cf077e31221de2481ff30b43d51, + 87f51853ce3671f4ba9a9953de1fff952c5f7e52) * `waitflags.h` (`WEXITED`, `WNOWAIT`, `WSTOPPED`, `WCONTINUED`) @@ -373,6 +374,33 @@ Last reviewed up to the [[Git mirror's d3bd58cf0a027016544949ffd27300ac5fb01bb8 <braunr> no, linux is more permissive <braunr> (at least, on this matter) + * `getcontext`/`makecontext`/`setcontext`/`swapcontext` + + Support for these functions within the Hurd threadvar environment has + been added, but for multi-threaded applications ([[libpthread]]), it is + a bit clunky: as a practical requirement, a thread's stack size always + has to be equal to `PTHREAD_STACK_DEFAULT`, 2 MiB, and also has to be + naturally aligned. The idea is still to [[get rid of Hurd threadvars + and replace them with TLS|t/tls-threadvar]]. + + Aside from [[gccgo]], the following packages might make use of these + functions, searching on <http://codesearch.debian.net/> for + `\b(get|set|make|swap)context\s*\(` on 2013-05-18: boost1.49, + chromium-browser, gtk-vnc, guile-1.8, iceape, icedove, iceweasel, + libgc, libsigsegv, luatex, mono, nspr, pth, ruby1.8, texlive-bin, uim, + and more. + + * `recvmmsg`/`sendmmsg` (`t/sendmmsg`) + + From [[!message-id "20120625233206.C000A2C06F@topped-with-meat.com"]], + Roland McGrath: *They are generally useful interfaces and there is + nothing intrinsically Linuxoid about them. At least when not given a + timeout, they could be implemented in terms of sendmsg/recvmsg. So + perhaps we ought to have a sysdeps/posix implementation that the Hurd + would use instead of stubs (and folks can consider adding new RPCs). + Then perhaps the Linux fallback case should be that instead of stubs, + too.* + For specific packages: * [[octave]] @@ -1090,6 +1118,63 @@ Last reviewed up to the [[Git mirror's d3bd58cf0a027016544949ffd27300ac5fb01bb8 ea4d37b3169908615b7c17c9c506c6a6c16b3a26, especially since mach's sleep.c is buggy (not considers interruption, extra time() (= RPC) call)«. + * ba384f6ed9275f3966505f2375b56d169e3dc588, + 0409959c86f6840510851a851a1588677a2e537b, + e57b0c6100e63bfd816ae59339452eafc81f1d3a `C++11 thread_local + destructors support`. Anything needed to be done in our [[libpthread]] + and configured for us in [[GCC]]? Probably need to replicate the + `nptl/pthread_create.c` change, and fix + `stdlib/Makefile`:`LDFLAGS-tst-tls-atexit`. + + +++ include/link.h + @@ -302,6 +302,9 @@ struct link_map + + /* Number of thread_local objects constructed by this DSO. */ + + size_t l_tls_dtor_count; + + +++ include/stdlib.h + @@ -100,6 +100,11 @@ extern int __cxa_atexit (void (*func) (void *), void *arg, void *d); + +extern int __cxa_thread_atexit_impl (void (*func) (void *), void *arg, + + void *d); + +extern void __call_tls_dtors (void); + +libc_hidden_proto (__call_tls_dtors); + + +++ nptl/pthread_create.c + @@ -311,6 +311,9 @@ start_thread (void *arg) + [after the thread function returns] + + /* Call destructors for the thread_local TLS variables. */ + + __call_tls_dtors (); + + +++ stdlib/Makefile + +LDFLAGS-tst-tls-atexit = $(common-objpfx)nptl/libpthread.so \ + + $(common-objpfx)dlfcn/libdl.so + + +++ stdlib/cxa_thread_atexit_impl.c + + +++ stdlib/exit.c + __run_exit_handlers (int status, struct exit_function_list **listp, + bool run_list_atexit) + { + + /* First, call the TLS destructors. */ + + __call_tls_dtors (); + + +gcc-4.7 tst-tls-atexit.c -c -std=gnu99 -fgnu89-inline -O2 -Wall -Winline -Wwrite-strings -fmerge-all-constants -frounding-math -g -Wno-parenth + +gcc-4.7 -nostdlib -nostartfiles -o [...]/tschwinge/Roger_Whittaker.build/stdlib/tst-tls-atexit [...]/tschwinge/Roger_Whittaker.build/nptl/lib + +gcc-4.7: error: [...]/tschwinge/Roger_Whittaker.build/nptl/libpthread.so: No such file or directory + +make[2]: *** [[...]/tschwinge/Roger_Whittaker.build/stdlib/tst-tls-atexit] Error 1 + +gcc-4.7 tst-tls-atexit-lib.c -c -std=gnu99 -fgnu89-inline -O2 -Wall -Winline -Wwrite-strings -fmerge-all-constants -frounding-math -g -Wno-par + +tst-tls-atexit-lib.c: In function 'do_foo': + +tst-tls-atexit-lib.c:35:3: warning: implicit declaration of function '__cxa_thread_atexit_impl' [-Wimplicit-function-declaration] + + * a600e5cef53e10147932d910cdb2fdfc62afae4e `Consolidate Linux and POSIX + libc_fatal code.` -- is `backtrace_and_maps` specific to Linux? + * 288f7d79fe2dcc8e62c539f57b25d7662a2cd5ff `Use __ehdr_start, if + available, as fallback for AT_PHDR.` -- once we require Binutils 2.23, + can we simplify [[glibc's process startup|glibc/process]] + (initialization of `_dl_phdr` and `_dl_phnum`)? As these are only used + for `[!SHARED]`, can we completely remove them (that is, the `phdr` and + `phdrsz` members) from `hurd_startup_data`, and simplify + [[hurd/interface/exec_startup_get_info]], or do we still require these + for the `[SHARED]` case? ## Update @@ -1102,8 +1187,14 @@ Last reviewed up to the [[Git mirror's d3bd58cf0a027016544949ffd27300ac5fb01bb8 # Build Here's a log of a glibc build run; this is from our [[Git repository's -60f4d2f33666d77ac018cb9956675dcad04bb996 (2013-02-12; -fbeafedeea37e0af1984a6511018d159f5ceed6a (2012-11-03)) +83fed41a9ed81db6ca517185aefb296f74868c2f (2013-05-26; +0323d08657f111267efa47bd448fbf6cd76befe8 (2013-05-24)) +plus 2b66ef5d55325b2957d6c62908ca065228e56814, +ec9dd97cecafba5ddf5c3ec683db7ad5b4421923, +07b4c13d0be4814ef10bbfbfd68db604978aa0e5, +528c24058fb100fb27fe5c211b92be84c67a6659, `t/elfosabi_gnu` reverted, +ec9dd97cecafba5ddf5c3ec683db7ad5b4421923 (again...), +`id:"87bo7xo1ay.fsf@kepler.schwinge.homeip.net"` sources|source_repositories/glibc]], run on coulomb.SCHWINGE. $ export LC_ALL=C @@ -1224,7 +1315,7 @@ TODO. $ make install_root="$PWD".install install 2>&1 | tee log_install [...] -This takes up around 100 MiB, and needs roughly X min on kepler.SCHWINGE and 16 +This takes up around 100 MiB, and needs roughly X min on kepler.SCHWINGE and 14 min on coulomb.SCHWINGE. @@ -1240,11 +1331,12 @@ TODO. $ make -k install_root=/INVALID check fast-check=yes 2>&1 | tee log_test [...] -This needs roughly X min on kepler.SCHWINGE and 60 min on coulomb.SCHWINGE. +This needs roughly X min on kepler.SCHWINGE and 145 min on coulomb.SCHWINGE. Specifying `fast-check=yes` disables the `conformtest` which takes 1.75 h (out of 2.75 h total) on coulomb.SCHWINGE, doesn't pass anyway, and clearly isn't our most critical issue to solve. +`elf/tst-xmmymm.out` is another candidate to disable: needs 90 min to run. ## Analysis @@ -1270,16 +1362,6 @@ Failures, mostly in order of appearance: SIGSEGV. Or SIGILL. - * `stdlib/bug-getcontext.out` - - getcontext failed, errno: 1073741902. - - [[Not implemented|t/tls-threadvar]]. - In 8958805c11c741d9211e20612c86271d906c9a0b - testing, `stdlib/bug-getcontext.out` now says: *Skipping test; no support - for FP exceptions.*, in cba1c83ad62a11347684a9daf349e659237a1741 testing, - it's back to the previous failure. - * `stdlib/tst-secure-getenv.out` open (/proc/self/exe): No such file or directory @@ -1299,6 +1381,8 @@ Failures, mostly in order of appearance: * `libio/tst-atime.out`, `dirent/tst-fdopendir.out` + [[!message-id "201305102256.56636.toscano.pino@tiscali.it"]]. + `libio/tst-atime.out`: atime has not changed @@ -1389,6 +1473,8 @@ Failures, mostly in order of appearance: * `posix/bug-glob2.out` + Intermittent. + Timed out: killed the child process * `posix/annexc.out` @@ -1460,6 +1546,10 @@ Failures, mostly in order of appearance: Perhps because we implement `vfork` in terms of `fork` (`posix/vfork.c`)? + * `posix/tst-pathconf.out` + + pathconf on directory failed: (os/kern) successful + * `io/test-lfs.out` /home/thomas/tmp/glibc/tschwinge/Roger_Whittaker.build/io/test-lfs: cannot write test string to large file: Invalid argument @@ -1471,17 +1561,6 @@ Failures, mostly in order of appearance: `futimesat` is a stub. - * `resource/bug-ulimit1.out` - - Result of ulimit (UL_SETFSIZE, 10000): 0 - Result of ulimit(UL_GETFSIZE): 10000 - - Buggy sysdeps/unix/bsd/ulimit.c return values. - - [[!message-id "201211182342.51619.toscano.pino@tiscali.it"]] - - Fixed in glibc >= 2.18. - * `misc/tst-pselect.o` tst-pselect.c: In function 'do_test': @@ -1610,7 +1689,7 @@ Failures, mostly in order of appearance: SIGSEGV. - * `elf/tst-audit1.out`, `elf/tst-audit2.out` + * `elf/tst-audit1.out`, `elf/tst-audit2.out`, `elf/tst-audit8.out` SIGKILL. @@ -1631,6 +1710,11 @@ Failures, mostly in order of appearance: A lot. Including `/usr/include/device/*.h`, `/usr/include/mach/*.h`, `/usr/include/hurd/*.h`. + * `debug/tst-longjmp_chk2.out`, `debug/tst-longjmp_chk3.out`, + `debug/tst-longjmp_chk4.out`, `debug/tst-longjmp_chk5.out` + + All say: `Obtained backtrace with 0 functions`. + Earlier failures; no longer seen: * `test-assert-perr.out` @@ -1681,6 +1765,21 @@ Earlier failures; no longer seen: As of 8958805c11c741d9211e20612c86271d906c9a0b, this test now passes -- correct? + * `stdlib/bug-getcontext.out` + + getcontext failed, errno: 1073741902. + + Fixed, implemented in `t/context_functions`. + + * `resource/bug-ulimit1.out` + + Result of ulimit (UL_SETFSIZE, 10000): 0 + Result of ulimit(UL_GETFSIZE): 10000 + + Buggy `sysdeps/unix/bsd/ulimit.c` return values. + + Fixed, [[!message-id "201211182342.51619.toscano.pino@tiscali.it"]]. + Compared to Debian: $ bash ~/tmp/glibc/debian/eglibc-2.13/debian/testsuite-checking/convertlog.sh log_test > log_test.filtered |