[[!meta copyright="Copyright © 2007, 2008, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] [[!meta title=binutils-gdb]] [[!tag stable_URL open_issue_binutils open_issue_gdb]] Here's what's to be done for maintaining GNU Binutils and GDB. [[!toc levels=2]] # General Information ## [[/Binutils]] As these tools primarily deal with low-level parts of the target architecture and the object file format (ELF ABI), which are essentially (at least meant to be) the same, there shouldn't be many differences comparing the binutils between the GNU/Hurd and GNU/Linux ports, for example. There are a few, though, as explained below. ## [[/GDB]] GDB needs an processor architecture as well as operating system port. # Configuration Last reviewed up to Git commit c2853f3d99797a321c37948297441ca6021f719a (2014-02-14). * Globally * a.out (such as `ld/emulparams/i386linux.sh`, `ld/emultempl/linux.em`, etc.), COFF, PE image support and 64-bit support are not interesting. * In the testsuites, `.exp` and `.d` files very likely should not only care for `*-*-linux*`, but also `*-*-gnu*`. (If they need to be conditionalized like this at all.) * `bfd/` * `config.bfd` * `i[3-7]86-*-gnu*` Comparing to `i[3-7]86-*-linux-*`: * `i386linux_vec` -- a.out. * `i386pei_vec` -- PE. * 64 bit. * `configure.host` Souldn't need anything. x86 Linux neither. * `configure.in` Linux: * `COREFILE=trad-core.lo` with `TRAD_HEADER='"hosts/i386linux.h"'` We don't have any such core file support configured. TODO: should we? Where is this core file reading exactly used? GDB? * `i386linux_vec` -- a.out. * `i386pei_vec` -- PE. * `binutils/` * `configure.tgt` * `gas/` * `config/te-gnu.h` C.f. `te-linux.h`; search tree for `TE_LINUX` vs. `TE_GNU` usage. * `tc-i386.h` Sole `TE_LINUX` usage is for a.out. * `configure.tgt` * `gdb/` * Have a look at config/i386/i386gnu.mh. * configure.tgt * glibc-tdep et al. also for GNU/Hurd? * [[service_solahart_jakarta_selatan__082122541663/gdb/gdbserver]] * In `gdb/gnu-nat.c:gnu_wait`, we don't implement `gdb/target/wait.h:TARGET_WNOHANG`. What is this needed for? * `libdecnumber/` Should/can probably align to GNU/Linux. * `ld/` * `configure.host` * `*-*-gnu*` TODO: resolve `crt0.o` vs. `crt1.o` issue. [[Testsuite failures|binutils#static]]. * `configure.tgt` * `i[3-7]86-*-gnu*` Compare to `i[3-7]86-*-linux-*`, but don't need a.out (`i386linux`) and 64 bit support. * `__ehdr_start symbol`, c84ed8d89d0b8bf5a2968d465f77ac24bcfc40c2 -- can this be helpful in the exec server, glibc, or elsewhere? Used in GDB (BFD) commit bdbd9758806ed855af89244870fdc52cf3ff09bc. Used in glibc commit 288f7d79fe2dcc8e62c539f57b25d7662a2cd5ff `Use __ehdr_start, if available, as fallback for AT_PHDR.`. * `Add HOSTING_SCRT0 for PIE test`, 49cc20aa5c416ea4307931cccf6353247368187d -- is for GNU/Linux only; but also seems unused. * 82763a3d329b0d342d0273941b1521be9ef0c604 »MODIFIED is unknown, pass it as true.« * Configure so that Debian system's `/usr/lib/debug/[...]` will be loaded automatically. * [[!message-id "m3ei24vh4l.fsf@fleche.redhat.com"]] * [low] c26e9cbb0ce70e8fca32a40c434a0837bf46750a, `gdb/gnu-nat.c:set_exceptions_cmd`, `Make this take effect immediately in a running process`. * [low] b27caf75c311991772b316fe7c0eecfd5788eeaf, ld, `Add HOSTING_SLIBS and use it for -pie`. For us, too? # Build Here's a log of a binutils-gdb build run; this is from Git commit c2853f3d99797a321c37948297441ca6021f719a (2014-02-14) plus [[!message-id "87vbxxhww4.fsf@kepler.schwinge.homeip.net"]], [[!message-id "8738kyi30l.fsf@kepler.schwinge.homeip.net"]], [[!message-id "8761ofv62k.fsf@kepler.schwinge.homeip.net"]], [[!message-id "1391759958-972-2-git-send-email-yao@codesourcery.com"]], [[!message-id "1391759958-972-3-git-send-email-yao@codesourcery.com"]], run on kepler.SCHWINGE and coulomb.SCHWINGE. $ export LC_ALL=C $ ../W._C._Handy/configure --prefix="$PWD".install --enable-gold --with-sysroot=/ SHELL=/bin/dash CC=gcc-4.8 CXX=g++-4.8 --disable-werror 2>&1 | tee log_build [...] $ make 2>&1 | tee log_build_ [...] Different hosts may default to different shells and compiler versions; thus harmonized. Debian GCC (which is used in binutils' testsuite) likes to pass `--sysroot=/` to `ld`, so we need to configure binutils with support for sysroots. In the GDB build, there are several occurences of *error: dereferencing type-punned pointer will break strict-aliasing rules* in the MIG-generated stub files; thus no `-Werror` until that is resolved ([[service_solahart_jakarta_selatan__082122541663/strict_aliasing]]). This takes up around 1.3 GiB, and needs roughly 17 min on kepler.SCHWINGE and 79 min on coulomb.SCHWINGE. ## Analysis x86 GNU/Linux' and GNU/Hurd's configurations are slightly different, thus mask out most of the differences that are due to GNU/Linux supporting more core file formats, and more emulation vectors. $ toolchain/logs/process binutils-gdb build * For GDB, why do we specify `-D_GNU_SOURCE`, and GNU/Linux doesn't? * GNU/Linux: `gdb/symfile-mem.c` for [[vDSO]]. * GNU/Linux: `gdb/i386-nat.c` for hardware breakpoints, etc. -- we should probably use that, too. Related to Samuel's Hurd GDB patch? * `gdb/gnu-nat.c` gnu-nat.c: In function 'proc_set_exception_port': gnu-nat.c:409:3: warning: format '%d' expects argument of type 'int', but argument 8 has type 'mach_port_t' [-Wformat] gnu-nat.c: In function 'proc_steal_exc_port': gnu-nat.c:449:7: warning: format '%d' expects argument of type 'int', but argument 8 has type 'mach_port_t' [-Wformat] gnu-nat.c:470:7: warning: format '%d' expects argument of type 'int', but argument 8 has type 'mach_port_t' [-Wformat] gnu-nat.c: In function 'make_proc': gnu-nat.c:583:7: warning: format '%d' expects argument of type 'int', but argument 2 has type 'mach_port_t' [-Wformat] gnu-nat.c:586:7: warning: format '%d' expects argument of type 'int', but argument 8 has type 'mach_port_t' [-Wformat] gnu-nat.c: In function 'inf_set_pid': gnu-nat.c:761:3: warning: format '%d' expects argument of type 'int', but argument 7 has type 'task_t' [-Wformat] gnu-nat.c: In function 'inf_validate_procs': gnu-nat.c:1085:6: warning: format '%d' expects argument of type 'int', but argument 8 has type 'thread_t' [-Wformat] gnu-nat.c: In function 'inf_signal': gnu-nat.c:1349:4: warning: format '%d' expects argument of type 'int', but argument 7 has type 'thread_t' [-Wformat] gnu-nat.c:1349:4: warning: format '%d' expects argument of type 'int', but argument 8 has type 'thread_t' [-Wformat] gnu-nat.c: In function 'S_exception_raise_request': gnu-nat.c:1668:3: warning: format '%d' expects argument of type 'int', but argument 7 has type 'thread_t' [-Wformat] gnu-nat.c:1668:3: warning: format '%d' expects argument of type 'int', but argument 8 has type 'task_t' [-Wformat] gnu-nat.c:1705:8: warning: format '%d' expects argument of type 'int', but argument 7 has type 'mach_port_t' [-Wformat] gnu-nat.c:1711:8: warning: format '%d' expects argument of type 'int', but argument 7 has type 'mach_port_t' [-Wformat] gnu-nat.c: In function 'do_mach_notify_dead_name': gnu-nat.c:1762:3: warning: format '%d' expects argument of type 'int', but argument 7 has type 'mach_port_t' [-Wformat] gnu-nat.c: In function 'gnu_write_inferior': gnu-nat.c:2383:8: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'vm_address_t' [-Wformat] gnu-nat.c:2393:8: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'vm_address_t' [-Wformat] gnu-nat.c: In function 'steal_exc_port': gnu-nat.c:2864:5: warning: format '%d' expects argument of type 'int', but argument 2 has type 'mach_port_t' [-Wformat] * fe19822761b4635f392875a186e48af446b40f41..7a63e9515491f21eaf07301df87d389def20e317: `-Wmissing-prototypes` notify_S.c:305:24: warning: no previous prototype for 'notify_server' [] notify_S.c:341:28: warning: no previous prototype for 'notify_server_routine' [] process_reply_S.c:343:24: warning: no previous prototype for 'process_reply_server' [] process_reply_S.c:379:28: warning: no previous prototype for 'process_reply_server_routine' [] msg_reply_S.c:165:24: warning: no previous prototype for 'msg_reply_server' [] msg_reply_S.c:201:28: warning: no previous prototype for 'msg_reply_server_routine' [] exc_request_S.c:157:24: warning: no previous prototype for 'exc_server' [] exc_request_S.c:193:28: warning: no previous prototype for 'exc_server_routine' [] * `O_NOFOLLOW` First seen in 20f498edfd7e57d3297febcf9c7c7d667cc74239..69a5e2b022c7d15ec4c7c49e6f53a8d924d3b72b: -checking for working fcntl.h... yes +checking for working fcntl.h... no (bad O_NOFOLLOW) [[!taglink open_issue_glibc]]? # Install $ make install 2>&1 | tee log_install [...] This takes up around 200 MiB, and needs roughly 2 min on kepler.SCHWINGE and 6 min on coulomb.SCHWINGE. ## Analysis $ toolchain/logs/process binutils-gdb install * `libtool: finish`: `ldconfig` is not run for the Hurd. # Testsuite $ make -k check 2>&1 | tee log_test [...] This needs roughly 20 min on kepler.SCHWINGE and 140 min on coulomb.SCHWINGE. When running `make -k check 2>&1 | tee log_test`, at the end of the testsuite the `tee` process does not terminate if there are still stray leftover processes that [have their stdout/stderr open](http://sourceware.org/ml/gdb-patches/2012-10/msg00489.html). `kill`ing these (`SIGKILL` may be needed), makes the `tee` process terminate, too. On GNU/Hurd, these generally are `gdb.multi/watchpoint-multi`, and an unknown (`?`) GDB one ("57 PIDs before" `expect [...] gdb.cp`). ## Analysis GDB's testsuite uses the system's default `gcc` (and similar) compilers, not those specified on the `configure` line ([[!taglink open_issue_gdb]]?), see `find_gcc` (and similar) usage in the testsuite and DejaGnu. Maybe something like `gdb/testsuite/boards/cc-with-tweaks.exp` would help, or setting `CC_FOR_TARGET` (and similar) per `gdb/testsuite/lib/future.exp`? $ toolchain/logs/process binutils-gdb test * `FAIL: static [...]` The testsuite isn't prepared for using `crt0.o` instead of `crt1.o` depending on whether a static or dynamic executable is created. Documented in `ld/configure.host`. Perhaps we should finally rewrite this messy code in glibc? Or, something similar to commit 49cc20aa5c416ea4307931cccf6353247368187d `Add HOSTING_SCRT0 for PIE test` or commit b27caf75c311991772b316fe7c0eecfd5788eeaf `Add HOSTING_SLIBS and use it for -pie` can be used. Same issue for `FAIL: Common symbol override ifunc *` ones? * `FAIL: ld-elf/64ksec` On the idle grubber, this one takes a few minutes wall time to complete successfully ([[I/O system weakness|performance/io_system/binutils_ld_64ksec]]), so assuming some system load variation, the testsuite's timeout may trigger. * `FAIL: gas/i386/rept` (intermittently) Added in commit 06f1247c54126b9f1e6acb8ff8c7be35aec6f44c (2012-06-07) as part of the fix for [[!sourceware_PR 14201]], renamed in commit d654e24bbc2f601df4dc43b26049b0339528b93a (2012-06-07): WARNING: program timed out. FAIL: gas/i386/rept * ld IFUNC execution tests Missing [[IFUNC]] support on GNU/Hurd. Added in commit 82c5587db078581cfe94a4385ed99de1d1fa6657 (2012-09-19): FAIL: Common symbol override ifunc test 1a FAIL: Common symbol override ifunc test 1b * gold GNU/Linux vs. GNU/Hurd -FAIL: relro_test.sh +PASS: relro_test.sh -PASS: ver_matching_test.sh +FAIL: ver_matching_test.sh -PASS: script_test_3 +FAIL: script_test_3 -PASS: tls_phdrs_script_test +FAIL: tls_phdrs_script_test * `gdb.base/attach-pie-misread.exp` Is only run for GNU/Linux; needs [[prelink]]. * Disabled * `gdb.base/interrupt.exp` PASS: gdb.base/interrupt.exp: child process is alive a a PASS: gdb.base/interrupt.exp: child process ate our char ^C Program received signal SIGINT, Interrupt. -0x010bf5a2 in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 +0x010bdb09 in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 (gdb) PASS: gdb.base/interrupt.exp: send_gdb control C p func1 () Program received signal SIGTRAP, Trace/breakpoint trap. -0x010bf5a2 in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 +0x010bdb09 in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 The program being debugged was signaled while in a function called from GDB. GDB remains in the frame where the signal was received. To change this behavior use "set unwindonsignal on". Evaluation of the expression containing the function (func1) will be abandoned. When the function is done executing, GDB will silently stop. (gdb) FAIL: gdb.base/interrupt.exp: call function when asleep (wrong output) p func1 () Program received signal SIGTRAP, Trace/breakpoint trap. -0x010bf5a2 in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 +0x010bdb09 in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 The program being debugged was signaled while in a function called from GDB. GDB remains in the frame where the signal was received. To change this behavior use "set unwindonsignal on". Evaluation of the expression containing the function (func1) will be abandoned. When the function is done executing, GDB will silently stop. (gdb) FAIL: gdb.base/interrupt.exp: call function a second time continue Continuing. -PASS: gdb.base/interrupt.exp: continue + +Program received signal SIGSEGV, Segmentation fault. +0x010bdb09 in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 +(gdb) FAIL: gdb.base/interrupt.exp: continue data PASS: gdb.base/interrupt.exp: echo data ^C(gdb) Quit (gdb) FAIL: gdb.base/interrupt.exp: Send Control-C, second time signal SIGINT Continuing with signal SIGINT. PASS: gdb.base/interrupt.exp: signal SIGINT more data PASS: gdb.base/interrupt.exp: echo more data Program received signal SIGSEGV, Segmentation fault. -0x010bf6c8 in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 +0x010bdc9d in _hurd_intr_rpc_mach_msg () from /lib/i386-gnu/libc.so.0.3 (gdb) more data Undefined command: "more". Try "help". (gdb) FAIL: gdb.base/interrupt.exp: send end of file -testcase ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/interrupt.exp completed in 6 seconds +[hangs] 7939 1000 6817 7939 7939 2 144M 8.92M 93.8 5:29.23 10hrs /media/erich/home/thomas/tmp/gdb/tschwinge/Ferry_Tagscherer.build/gdb/testsuite/../../gdb/gdb -nw -nx -data-directory /media/erich/home/thomas/tmp/gdb/tschwinge/Ferry_Tagscherer.build/gdb/testsuite/../data-directory 7944 1000 7939 7944 7939 2 146M 744K 0.0 0:00.00 0:00.01 /media/erich/home/thomas/tmp/gdb/tschwinge/Ferry_Tagscherer.build/gdb/testsuite/gdb.base/interrupt $ gdb -q tmp/gdb/tschwinge/Ferry_Tagscherer.build/gdb/gdb 7961 Reading symbols from /media/erich/home/thomas/tmp/gdb/tschwinge/Ferry_Tagscherer.build/gdb/gdb...done. Attaching to program `/media/erich/home/thomas/tmp/gdb/tschwinge/Ferry_Tagscherer.build/gdb/gdb', pid 7961 [New Thread 7961.1] [New Thread 7961.2] warning: Can't modify tracing state for pid 7961: (ipc/rcv) timed out Reading symbols [...] (gdb) thread apply all bt full Thread 2 (Thread 7961.2): #0 0x014949cc in swtch_pri () at /build/eglibc-wYOBb2/eglibc-2.17/build-tree/hurd-i386-libc/mach/swtch_pri.S:2 No locals. #1 0x01496354 in __spin_lock_solid (lock=0x168100c) at spin-solid.c:26 No locals. #2 0x014aa677 in __spin_lock (__lock=) at ../mach/lock-intern.h:54 No locals. #3 _hurd_sigstate_lock (ss=0x1681808) at hurdsig.c:175 No locals. #4 0x014acbfb in post_signal (untraced=untraced@entry=0) at hurdsig.c:680 err = handler = blocked = __PRETTY_FUNCTION__ = "post_signal" signo = 11 act = 23593696 ss = 0x1681808 thread_state = {set = 0, basic = {gs = 1, fs = 17840912, es = 23594144, ds = 17840912, edi = 23290621, esi = 21506724, ebp = 23281960, esp = 1, ebx = 3, edx = 27255556, ecx = 23599112, eax = 163840, eip = 23273912, cs = 29351492, efl = 29351424, uesp = 0, ss = 29351336}, fpu = {fpkind = 17840912, initialized = 29351344, hw_state = "\364\213\002\000\000\000\000\000\000\000\000\000cfH\001\000\000\000\000\377\377\377\377\000 c\001T\244G\001\020;\020\001\b\030h\001\000\260g\001\370ݿ\001\060\357\277\001p\000\000\000\233\322e\001\220ݿ\001\216\246J\001\000\300b\001\260\341J\001\b\030h\001\000\000\000\000\000\000\000\000\000 c\001\022\000\000\000\000\200\002\000\020;\020\001\030\306b\001", exc_status = 359}} ss_suspended = 0 reply = 0x1bfddf4 detail = 0x1bfde4c #5 0x014ae29e in _hurd_internal_post_signal (ss=ss@entry=0x1681808, signo=11, detail=detail@entry=0x1bfde4c, reply_port=reply_port@entry=0, reply_port_type=reply_port_type@entry=17, untraced=untraced@entry=0) at hurdsig.c:1221 reply_rpc = 0x165d200 <__msg_sig_post_reply> #6 0x014af98f in _S_catch_exception_raise (port=142, thread=112, task=1, exception=1, code=2, subcode=19137735) at catch-exc.c:88 ss = 0x1681808 signo = 11 d = {exc = 1, exc_code = 2, exc_subcode = 19137735, code = 2, error = EKERN_PROTECTION_FAILURE} #7 0x016442c2 in _Xexception_raise (OutHeadP=0x1bfdf20, InHeadP=0x1bfef30) at /build/eglibc-wYOBb2/eglibc-2.17/build-tree/hurd-i386-libc/mach/mach/exc_server.c:150 No locals. #8 _Xexception_raise (InHeadP=0x1bfef30, OutHeadP=0x1bfdf20) at /build/eglibc-wYOBb2/eglibc-2.17/build-tree/hurd-i386-libc/mach/mach/exc_server.c:41 In0P = 0x1bfef30 OutP = 0x1bfdf20 #9 0x01644344 in _S_exc_server (InHeadP=InHeadP@entry=0x1bfef30, OutHeadP=OutHeadP@entry=0x1bfdf20) at /build/eglibc-wYOBb2/eglibc-2.17/build-tree/hurd-i386-libc/mach/mach/exc_server.c:189 InP = 0x1bfef30 OutP = 0x1bfdf20 routine = 0x1644220 <_Xexception_raise> #10 0x014a58ec in msgport_server (outp=0x1bfdf20, inp=0x1bfef30) at msgportdemux.c:49 No locals. #11 msgport_server (inp=inp@entry=0x1bfef30, outp=outp@entry=0x1bfdf20) at msgportdemux.c:36 d = 0x0 #12 0x01495898 in __mach_msg_server_timeout (demux=demux@entry=0x14a5890 , max_size=max_size@entry=4096, rcv_name=rcv_name@entry=142, option=option@entry=0, timeout=timeout@entry=0) at msgserver.c:108 request = 0x1bfef30 reply = 0x1bfdf20 mr = __PRETTY_FUNCTION__ = "__mach_msg_server_timeout" #13 0x014959cb in __mach_msg_server (demux=demux@entry=0x14a5890 , max_size=4096, rcv_name=142) at msgserver.c:195 No locals. #14 0x014a597d in _hurd_msgport_receive () at msgportdemux.c:67 No locals. #15 0x010f7956 in entry_point (self=0x8520788, start_routine=0x14a5920 <_hurd_msgport_receive>, arg=0x0) at ./pthread/pt-create.c:61 No locals. #16 0x00000000 in ?? () No symbol table info available. Thread 1 (Thread 7961.1): #0 _hurd_userlink_unlink (link=0x81c2a20 ) at ../hurd/hurd/userlink.h:123 No locals. #1 __sigreturn (scp=0x81c2950 ) at ../sysdeps/mach/hurd/i386/sigreturn.c:47 link = 0x81c2a20 reply_port = #2 0x014aef46 in trampoline () from /lib/i386-gnu/libc.so.0.3 No locals. #3 0x081c2950 in ?? () at ../../Ferry_Tagscherer/gdb/event-top.c:869 sigtstp_token = 0x860a7c0 sighup_token = 0x86089e0 more_to_come = 0 sigfpe_token = 0x860a7a8 sigquit_token = 0x86089c8 sigint_token = 0x860a3b0 call_readline = 0x81c2ab0 exec_done_display_p = 0 input_handler = 0x81c2c50 async_command_editing_p = 1 after_char_processing_hook = 0x0 async_annotation_suffix = 0x83d8648 "prompt" input_fd = 0 readline_input_state = {linebuffer = 0x0, linebuffer_ptr = 0x0} Backtrace stopped: previous frame inner to this frame (corrupt stack?) (gdb) kill Kill the program being debugged? (y or n) y * `gdb.base/readline.exp` [[service_solahart_jakarta_selatan__082122541663/term_blocking]] issue. * `gdb.base/sigall.exp` From `send signal TSTP` on, all FAIL running into timeouts. * `gdb.python/py-inferior.exp` (mostly disabled) Running ../../../Ferry_Tagscherer/gdb/testsuite/gdb.python/py-inferior.exp ... [...] python print 'result =', i0.was_attached result = False (gdb) PASS: gdb.python/py-inferior.exp: test Inferior.was_attached python print i0.threads () (, ) (gdb) FAIL: gdb.python/py-inferior.exp: test Inferior.threads break check_threads Breakpoint 2 at 0x8048869: file ../../../Ferry_Tagscherer/gdb/testsuite/gdb.python/py-inferior.c, line 61. (gdb) continue Continuing. [New Thread 25670.6] [New Thread 25670.7] [New Thread 25670.8] [New Thread 25670.9] [New Thread 25670.10] [New Thread 25670.11] [New Thread 25670.12] [New Thread 25670.13] Breakpoint 2, check_threads (barrier=0x15ff144) at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.python/py-inferior.c:61 61 pthread_barrier_wait (barrier); (gdb) PASS: gdb.python/py-inferior.exp: continue to breakpoint: cont to check_threads python print len (i0.threads ()) 10 (gdb) FAIL: gdb.python/py-inferior.exp: test Inferior.threads 2 break 28 Breakpoint 3 at 0x80487c2: file ../../../Ferry_Tagscherer/gdb/testsuite/gdb.python/py-inferior.c, line 28. (gdb) continue Continuing. FAIL: gdb.python/py-inferior.exp: continue to breakpoint: cont to Break here. (timeout) python addr = gdb.selected_frame ().read_var ('str') FAIL: gdb.python/py-inferior.exp: read str address (timeout) [All following tests FAIL with timeout.] FAIL: gdb.python/py-inferior.exp: Switch to first inferior (timeout) remove-inferiors 3 FAIL: gdb.python/py-inferior.exp: Remove second inferior (timeout) At this point, the system hangs; no new processes can be spawned, so perhaps an issue with the exec server. * `gdb.threads/manythreads.exp` [[!taglink open_issue_libpthread]]. Perhaps fails due to pthread attributes usage? Doesn't execute properly: $ gdb/testsuite/gdb.threads/manythreads manythreads: ../libpthread/sysdeps/mach/pt-thread-halt.c:51: __pthread_thread_halt: Unexpected error: (ipc/rcv) invalid name. Killed * Linux syscall usage, `` * `UNSUPPORTED: gdb.threads/ia64-sigill.exp: Couldn't compile ../../../master/gdb/testsuite/gdb.threads/ia64-sigill.c: unrecognized error` * `UNSUPPORTED: gdb.threads/siginfo-threads.exp: Couldn't compile ../../../Ferry_Tagscherer/gdb/testsuite/gdb.threads/siginfo-threads.c: unrecognized error` * `gdb.threads/sigstep-threads.c` Also uses `tgkill`. * `UNSUPPORTED: gdb.threads/watchpoint-fork.exp: parent: multithreaded: Couldn't compile ../../../Ferry_Tagscherer/gdb/testsuite/gdb.threads/watchpoint-fork-mt.c ../../../Ferry_Tagscherer/gdb/testsuite/gdb.threads/watchpoint-fork-parent.c: unrecognized error` * `UNSUPPORTED: gdb.threads/multi-create.exp: Couldn't compile ../../../master/gdb/testsuite/gdb.threads/multi-create.c: unrecognized error` ../../../master/gdb/testsuite/gdb.threads/multi-create.c: In function 'create_function': ../../../master/gdb/testsuite/gdb.threads/multi-create.c:46:39: error: 'PTHREAD_STACK_MIN' undeclared (first use in this function) ../../../master/gdb/testsuite/gdb.threads/multi-create.c:46:39: note: each undeclared identifier is reported only once for each function it appears in ../../../master/gdb/testsuite/gdb.threads/multi-create.c: In function 'main': ../../../master/gdb/testsuite/gdb.threads/multi-create.c:73:39: error: 'PTHREAD_STACK_MIN' undeclared (first use in this function) * `UNSUPPORTED: gdb.threads/staticthreads.exp: Couldn't compile ../../../master/gdb/testsuite/gdb.threads/staticthreads.c: unrecognized error` ../../../master/gdb/testsuite/gdb.threads/staticthreads.c: In function 'main': ../../../master/gdb/testsuite/gdb.threads/staticthreads.c:52:37: error: 'PTHREAD_STACK_MIN' undeclared (first use in this function) ../../../master/gdb/testsuite/gdb.threads/staticthreads.c:52:37: note: each undeclared identifier is reported only once for each function it appears in * `UNSUPPORTED: gdb.threads/create-fail.exp: Couldn't compile ../../../Ferry_Tagscherer/gdb/testsuite/gdb.threads/create-fail.c: unrecognized error` [...]/gdb.threads/create-fail.c:77: undefined reference to `pthread_attr_setaffinity_np' [...]/gdb.threads/create-fail.c:83: undefined reference to `pthread_create' * `UNTESTED: gdb.base/longest-types.exp: longest-types.exp` ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/longest-types.c:20:8: error: size of array 'buf' is too large Also on GNU/Linux. * `FAIL: gdb.base/jit.exp: PIE: one_jit_test-1: Can't run to main` (gdb) break main Breakpoint 1 at 0xb84: file ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/jit-main.c, line 128. (gdb) run Starting program: /media/erich/home/thomas/tmp/gdb/tschwinge/Ferry_Tagscherer.build/gdb/testsuite/gdb.base/jit-main Cannot access memory at address 0x393 Cannot access memory at address 0x38f (gdb) FAIL: gdb.base/jit.exp: PIE: one_jit_test-1: Can't run to main [[GCC/PIE]]. Is the following supposed to terminate in this way? (gdb) break main Breakpoint 1 at 0x675: file ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/attach-pie-noexec.c, line 23. (gdb) run Starting program: /media/erich/home/thomas/tmp/gdb/tschwinge/Ferry_Tagscherer.build/gdb/testsuite/gdb.base/attach-pie-noexec Cannot access memory at address 0x6c626172 Cannot access memory at address 0x6c62616e (gdb) testcase ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/attach-pie-noexec.exp completed in 3 seconds IRC, freenode, #hurd, 2013-09-06: How to debug a program that works in the shell but Cannot access memory at address ... in gdb? Build it without -pie -- but that is just a guess of what might be going on. * tschwinge clearly has spent enough time with obscure things to be able to make such guesses. tschwinge: looks like -fPIE is used. verified: some (all?) executables compiled with -fPIE, -fpie and linked with -pie cannot be debugged in gdb :( * `solib-event stop` Running ../../../Ferry_Tagscherer/gdb/testsuite/gdb.mi/mi-catch-load.exp ... PASS: gdb.mi/mi-catch-load.exp: breakpoint at main PASS: gdb.mi/mi-catch-load.exp: mi runto main PASS: gdb.mi/mi-catch-load.exp: catch-load: auto-solib-add on PASS: gdb.mi/mi-catch-load.exp: catch-load: catch load FAIL: gdb.mi/mi-catch-load.exp: catch-load: solib-event stop PASS: gdb.mi/mi-catch-load.exp: breakpoint at main PASS: gdb.mi/mi-catch-load.exp: mi runto main PASS: gdb.mi/mi-catch-load.exp: catch-unload: auto-solib-add on PASS: gdb.mi/mi-catch-load.exp: catch-unload: catch unload FAIL: gdb.mi/mi-catch-load.exp: catch-unload: solib-event stop *stopped,reason="signal-received",signal-name="SIGSEGV",signal-meaning="Segmentation fault",frame={addr="0x00014add",func="??",args=[],from="/lib/ld.so"},thread-id="4",stopped-threads="all" * `gdb.base/call-signal-resume.exp` $ gdb -q gdb/testsuite/gdb.base/call-signals (gdb) break stop_one (gdb) r (gdb) call gen_signal() (gdb) bt (gdb) frame [] (gdb) return (gdb) break handle_signal (gdb) c (gdb) c kepler.SCHWINGE: Breakpoint 2, handle_signal (sig=6) at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/call-signals.c:28 28 } (gdb) bt #0 handle_signal (sig=6) at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/call-signals.c:28 #1 #2 0xb7fde416 in __kernel_vsyscall () #3 0xb7dffd96 in kill () at ../sysdeps/unix/syscall-template.S:81 #4 0x0804859c in gen_signal () at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/call-signals.c:35 #5 0x08048610 in main () at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/call-signals.c:81 coulomb.SCHWINGE: Breakpoint 2, handle_signal (sig=6) at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/call-signals.c:28 28 } (gdb) bt #0 handle_signal (sig=6) at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/call-signals.c:28 #1 0x010baac2 in trampoline () from /lib/i386-gnu/libc.so.0.3 #2 0x00000006 in ?? () #3 0x00000000 in ?? () kepler.SCHWINGE: (gdb) c Continuing. no signal [Inferior 1 (process 10401) exited normally] coulomb.SCHWINGE: (gdb) c Continuing. no signal Program received signal SIGSEGV, Segmentation fault. 0x00000000 in ?? () (gdb) bt #0 0x00000000 in ?? () #1 0x01116c28 in _IO_acquire_lock_fct (p=) at libioP.h:905 #2 _IO_puts (str=0x80487e0 "no signal") at ioputs.c:45 #3 0x080486d8 in gen_signal () at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/call-signals.c:38 #4 0x0804873d in main () at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/call-signals.c:81 This is apparently new with the glibc 2.17 upgrade. If not doing the manual `gen_signal` call, it works fine. TODO. * `gdb.base/relativedebug.exp` (gdb) PASS: gdb.base/relativedebug.exp: continue bt #0 0x010a1afc in ?? () from /lib/i386-gnu/libc.so.0.3 #1 0x010a23be in mach_msg () from /lib/i386-gnu/libc.so.0.3 #2 0x0126cd98 in msg_sig_post () from /lib/i386-gnu/libhurduser.so.0.3 #3 0x010e2141 in ?? () from /lib/i386-gnu/libc.so.0.3 #4 0x010e23ed in kill () from /lib/i386-gnu/libc.so.0.3 #5 0x010e17f4 in raise () from /lib/i386-gnu/libc.so.0.3 #6 0x010e5b7c in abort () from /lib/i386-gnu/libc.so.0.3 #7 0x08048607 in handler (signo=14) at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/relativedebug.c:25 #8 0x010bdac2 in ?? () from /lib/i386-gnu/libc.so.0.3 Backtrace stopped: previous frame inner to this frame (corrupt stack?) (gdb) FAIL: gdb.base/relativedebug.exp: pause found in backtrace This is apparently new with the glibc 2.17 upgrade. Previously it said: (gdb) PASS: gdb.base/relativedebug.exp: continue bt #0 0x0107c85c in ?? () from /lib/i386-gnu/libc.so.0.3 #1 0x0107d069 in mach_msg () from /lib/i386-gnu/libc.so.0.3 #2 0x01220d4f in msg_sig_post () from /lib/i386-gnu/libhurduser.so.0.3 #3 0x010bb683 in ?? () from /lib/i386-gnu/libc.so.0.3 #4 0x010bb8f6 in kill () from /lib/i386-gnu/libc.so.0.3 #5 0x010bad76 in raise () from /lib/i386-gnu/libc.so.0.3 #6 0x010bf029 in abort () from /lib/i386-gnu/libc.so.0.3 #7 0x08048597 in handler (signo=14) at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/relativedebug.c:25 #8 0x01098282 in ?? () from /lib/i386-gnu/libc.so.0.3 #9 0x010bbe5a in sigsuspend () from /lib/i386-gnu/libc.so.0.3 #10 0x0112fee1 in pause () from /lib/i386-gnu/libc.so.0.3 #11 0x080485c5 in main () at ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/relativedebug.c:32 (gdb) PASS: gdb.base/relativedebug.exp: pause found in backtrace TODO. * `gdb.gdb/selftest.exp` (gdb) PASS: gdb.gdb/selftest.exp: send SIGINT signal to child process backtrace #0 0x0146fafc in ?? () from /lib/i386-gnu/libc.so.0.3 #1 0x014703be in mach_msg () from /lib/i386-gnu/libc.so.0.3 #2 0x0163bd98 in msg_sig_post () from /lib/i386-gnu/libhurduser.so.0.3 #3 0x014b0141 in ?? () from /lib/i386-gnu/libc.so.0.3 #4 0x014b03ed in kill () from /lib/i386-gnu/libc.so.0.3 #5 0x082cf471 in _rl_handle_signal (sig=2) at ../../Ferry_Tagscherer/readline/signals.c:221 #6 0x0148bac2 in ?? () from /lib/i386-gnu/libc.so.0.3 Backtrace stopped: previous frame inner to this frame (corrupt stack?) (gdb) FAIL: gdb.gdb/selftest.exp: backtrace through signal handler This is apparently new with the glibc 2.17 upgrade. Previously it said: (gdb) PASS: gdb.gdb/selftest.exp: send SIGINT signal to child process backtrace #0 0x0144885c in ?? () from /lib/i386-gnu/libc.so.0.3 #1 0x01449069 in mach_msg () from /lib/i386-gnu/libc.so.0.3 #2 0x015ecd4f in msg_sig_post () from /lib/i386-gnu/libhurduser.so.0.3 #3 0x01487683 in ?? () from /lib/i386-gnu/libc.so.0.3 #4 0x014878f6 in kill () from /lib/i386-gnu/libc.so.0.3 #5 0x082cf401 in _rl_handle_signal (sig=2) at ../../Ferry_Tagscherer/readline/signals.c:221 #6 0x01464282 in ?? () from /lib/i386-gnu/libc.so.0.3 #7 0x0144fce3 in ?? () from /lib/i386-gnu/libc.so.0.3 #8 0x0153975b in poll () from /lib/i386-gnu/libc.so.0.3 #9 0x081c91c2 in gdb_wait_for_event (block=1) at ../../Ferry_Tagscherer/gdb/event-loop.c:804 #10 0x081c998f in gdb_do_one_event () at ../../Ferry_Tagscherer/gdb/event-loop.c:402 #11 0x081c9b07 in start_event_loop () at ../../Ferry_Tagscherer/gdb/event-loop.c:431 #12 0x081c2f42 in captured_command_loop (data=data@entry=0x0) at ../../Ferry_Tagscherer/gdb/main.c:260 #13 0x081c0e57 in catch_errors (func=func@entry=0x81c2f30 , func_args=func_args@entry=0x0, errstring=errstring@entry=0x83 5b81b "", mask=mask@entry=6) at ../../Ferry_Tagscherer/gdb/exceptions.c:546 #14 0x081c388c in captured_main (data=data@entry=0x19ff150) at ../../Ferry_Tagscherer/gdb/main.c:1055 #15 0x081c0e57 in catch_errors (func=func@entry=0x81c3130 , func_args=func_args@entry=0x19ff150, errstring=errstring@entry=0x835b 81b "", mask=mask@entry=6) at ../../Ferry_Tagscherer/gdb/exceptions.c:546 #16 0x081c43c0 in gdb_main (args=0x19ff150) at ../../Ferry_Tagscherer/gdb/main.c:1064 #17 0x08099533 in main (argc=5, argv=0x19ff1e8) at ../../Ferry_Tagscherer/gdb/gdb.c:34 (gdb) PASS: gdb.gdb/selftest.exp: backtrace through signal handler TODO. * `gdb.base/restore.exp`, `gdb.base/store.exp` Several FAILs, starting with GCC 4.8 usage: (gdb) PASS: gdb.base/restore.exp: caller3 calls callee1; return callee now print l1 $16 = (gdb) FAIL: gdb.base/restore.exp: caller3 calls callee1; return restored l1 to 32492 [[!GCC_PR 55056]], [[!message-id "20130126202645.GA4888@host2.jankratochvil.net"]], and maybe [[!message-id "CAO2gOZXvCLdaKE2=ZKpjGVGq8A0wQ94-AUo7eKvvWHWncrU_yg@mail.gmail.com"]] look related. * `gdb.base/default.exp` shell echo Hi dad! bash: relocation error: /lib/i386-gnu/libdl.so.2: symbol __libc_lock_self, version GLIBC_PRIVATE not defined in file libc.so.0.3 with link time reference (gdb) FAIL: gdb.base/default.exp: shell echo Hi dad! TODO. * `gdb.base/exitsignal.exp` Running ../../../Ferry_Tagscherer/gdb/testsuite/gdb.base/exitsignal.exp ... PASS: gdb.base/exitsignal.exp: $_exitsignal is void before running PASS: gdb.base/exitsignal.exp: $_exitcode is void before running PASS: gdb.base/exitsignal.exp: trigger SIGSEGV PASS: gdb.base/exitsignal.exp: program terminated with SIGSEGV FAIL: gdb.base/exitsignal.exp: $_exitsignal is 11 (SIGSEGV) after SIGSEGV. PASS: gdb.base/exitsignal.exp: $_exitcode is still void after SIGSEGV PASS: gdb.base/exitsignal.exp: rerun to main FAIL: gdb.base/exitsignal.exp: $_exitsignal is 11 (SIGSEGV) after restarting the inferior PASS: gdb.base/exitsignal.exp: $_exitcode is still void after restarting the inferior PASS: gdb.base/exitsignal.exp: $_exitsignal is void before normal inferior is executed PASS: gdb.base/exitsignal.exp: $_exitcode is void before normal inferior is executed PASS: gdb.base/exitsignal.exp: continue until exit PASS: gdb.base/exitsignal.exp: $_exitcode is zero after normal inferior is executed PASS: gdb.base/exitsignal.exp: $_exitsignal is still void after normal inferior is executed TODO. * `gdb.arch/i386-prologue.exp` There are several FAILs, where there are unexpected frames showing up in backtraces, for example. Earlier on, these just FAILed on coulomb.SCHWINGE; since 9939e1314f970c6ba568956148a518ac710a280a..c2853f3d99797a321c37948297441ca6021f719a on kepler.SCHWINGE, too. TODO. * [[libgc|boehm_gc]] `GC_find_limit_with_bound` SIGSEGVs On coulomb.SCHWINGE, in 9939e1314f970c6ba568956148a518ac710a280a..c2853f3d99797a321c37948297441ca6021f719a several PASSes regressed to FAILs: Starting program: [...]/gdb/testsuite/gdb.gdb/xgdb -nw -nx -data-directory [...]/gdb/testsuite/../data-directory [New Thread 13417.5] Program received signal SIGSEGV, Segmentation fault. 0x0126b961 in GC_find_limit_with_bound () from /usr/lib/i386-gnu/libgc.so.1 (gdb) FAIL: gdb.gdb/complaints.exp: run until breakpoint at captured_command_loop WARNING: Couldn't test self Starting program: [...]/gdb/testsuite/gdb.gdb/xgdb -nw -nx -data-directory [...]/gdb/testsuite/../data-directory [New Thread 13448.5] Program received signal SIGSEGV, Segmentation fault. 0x0126b961 in GC_find_limit_with_bound () from /usr/lib/i386-gnu/libgc.so.1 (gdb) FAIL: gdb.gdb/python-interrupts.exp: run until breakpoint at captured_command_loop WARNING: Couldn't test self Starting program: [...]/gdb/testsuite/gdb.gdb/xgdb -nw -nx -data-directory [...]/gdb/testsuite/../data-directory [New Thread 13464.3] Program received signal SIGSEGV, Segmentation fault. 0x0126b961 in GC_find_limit_with_bound () from /usr/lib/i386-gnu/libgc.so.1 (gdb) FAIL: gdb.gdb/python-selftest.exp: run until breakpoint at captured_command_loop WARNING: Couldn't test self (gdb) PASS: gdb.gdb/selftest.exp: step into xmalloc call continue Continuing. Program received signal SIGSEGV, Segmentation fault. 0x0126b961 in GC_find_limit_with_bound () from /usr/lib/i386-gnu/libgc.so.1 (gdb) FAIL: gdb.gdb/selftest.exp: xgdb is at prompt These are all tests where GDB examines itself; being linked against libgc (new dependency due to new Guile scripting support; all Guile scripting tests PASS). So, probably some bad interaction between GDB and a debuggee that is using libgc; maybe libgc is using SIGSEGV for internal signalling purposes; see the `HEURISTIC2` discussion on [[boehm_gc]]. #0 0x0126b961 in GC_find_limit_with_bound () from /usr/lib/i386-gnu/libgc.so.1 #1 0x0126ba2e in GC_find_limit () from /usr/lib/i386-gnu/libgc.so.1 #2 0x0126bb15 in GC_get_stack_base () from /usr/lib/i386-gnu/libgc.so.1 #3 0x011be0ec in scm_init_guile () from /usr/lib/libguile-2.0.so.22 #4 0x081203ba in _initialize_guile () at ../../W._C._Handy/gdb/guile/guile.c:704 #5 0x082dc94d in initialize_all_files () at init.c:291 #6 0x082a3c7f in gdb_init (argv0=0x8563e90 "[...]/gdb/testsuite/gdb.gdb/xgdb") at ../../W._C._Handy/gdb/top.c:1822 #7 0x081da3b8 in captured_main (data=0x1bff164) at ../../W._C._Handy/gdb/main.c:747 #8 0x081d70e9 in catch_errors (func=func@entry=0x81da110 , func_args=func_args@entry=0x1bff164, errstring=errstring@entry=0x837a0e5 "", mask=mask@entry=RETURN_MASK_ALL) at ../../W._C._Handy/gdb/exceptions.c:524 #9 0x081db277 in gdb_main (args=0x1bff164) at ../../W._C._Handy/gdb/main.c:1062 #10 0x0809714b in main (argc=5, argv=0x1bff1f4) at ../../W._C._Handy/gdb/gdb.c:33 TODO. TODO. # Open Issues ## [[tag/open_issue_binutils]] ## [[tag/open_issue_gdb]] ## GDB `info files` SIGSEGV [[!tag open_issue_gdb]] ### IRC, freenode, #hurd, 2013-09-07 I'm trying to debug pfinet, but I'm not very familiar with gdb. Tried to attach to the running pfinet process (built with debug symbols), set a breakpoint and ... when I ran "info files" the process segfaulted. which process segfaults, pfinet or gdb? gdb segfaults. ## GDB Watchpoints [[!tag open_issue_gdb]] ### IRC, freenode, #hurd, 2013-09-16 tschwinge: Is gdb watch known to fail on hurd? It hangs for me when logged in via ssh. gnu_srs: Don't know about GDB's watch command. Are you sure it is hanging?