[[!meta copyright="Copyright © 2007, 2008, 2010, 2011, 2012, 2013 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]]."]]"""]] [[!tag open_issue_gdb]] Here's what's to be done for maintaining GNU GDB. [[!toc levels=2]] # [[General information|/gdb]] # [[Sources|source_repositories/gdb]] # Configuration Last reviewed up to the [[Git mirror's 6b25dae901ddedb3f330803542d3eac73cdcae4b (2013-03-13) sources|source_repositories/gdb]]. * Globally * a.out, 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 the need to be conditionalized like this at all.) * `bfd/` See [[binutils]]. * `libdecnumber/` Should/can probably align to GNU/Linux. * Have a look at config/i386/i386gnu.mh. * configure.tgt * glibc-tdep et al. also for GNU/Hurd? * [[gdbserver]] * 82763a3d329b0d342d0273941b1521be9ef0c604 »MODIFIED is unknown, pass it as true.« * Configure so that Debian system's `/usr/lib/debug/[...]` will be loaded automatically. # Build Here's a log of a GDB build run; this is from our [[Git repository|source_repositories/gdb]]'s `tschwinge/Ferry_Tagscherer` branch, commit 6b25dae901ddedb3f330803542d3eac73cdcae4b (2013-03-13), run on kepler.SCHWINGE and coulomb.SCHWINGE. $ export LC_ALL=C $ ../Ferry_Tagscherer/configure --prefix="$PWD".install SHELL=/bin/dash CC=gcc-4.7 CXX=g++-4.7 --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. 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 ([[strict_aliasing]]). This takes up around 210 MiB and needs roughly 9 min on kepler.SCHWINGE and 25 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 gdb build * 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` gnu-nat.c: At top level: gnu-nat.c:643:1: warning: no previous prototype for 'make_inf' [] gnu-nat.c: At top level: gnu-nat.c:879:1: warning: no previous prototype for 'inf_set_traced' [] gnu-nat.c:980:1: warning: no previous prototype for 'inf_port_to_thread' [] gnu-nat.c: At top level: gnu-nat.c:1748:1: warning: no previous prototype for 'inf_task_died_status' [] gnu-nat.c: At top level: gnu-nat.c:2273:1: warning: no previous prototype for 'gnu_read_inferior' [] gnu-nat.c:2319:1: warning: no previous prototype for 'gnu_write_inferior' [] gnu-nat.c: At top level: gnu-nat.c:3415:1: warning: no previous prototype for '_initialize_gnu_nat' [] 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' [] * `dlopen`/`-ldl` -checking for library containing dlopen... none required +checking for library containing dlopen... -ldl * `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]]? * Why does GNU/Linux have an additional `-ldl -rdynamic` when linking `gdb`? * 00e1c4298d2b6fe040a9a970e98349602b12ddbf..6b25dae901ddedb3f330803542d3eac73cdcae4b: +../../Ferry_Tagscherer/gdb/gnu-nat.c: In function 'info_port_rights': +../../Ferry_Tagscherer/gdb/gnu-nat.c:3058:11: warning: passing argument 1 of 'parse_to_comma_and_eval' from incompatible pointer type [enabled by default] +In file included from ../../Ferry_Tagscherer/gdb/breakpoint.h:23:0, + from ../../Ferry_Tagscherer/gdb/inferior.h:37, + from ../../Ferry_Tagscherer/gdb/gnu-nat.c:56: +../../Ferry_Tagscherer/gdb/value.h:729:22: note: expected 'const char **' but argument is of type 'char **' # Install $ make install 2>&1 | tee log_install [...] This takes up around 50 MiB, and needs roughly 1 min on kepler.SCHWINGE and 2 min on coulomb.SCHWINGE. ## Analysis $ toolchain/logs/process gdb install * `libtool: finish`: `ldconfig` is not run for the Hurd. # Testsuite $ make -k check 2>&1 | tee log_test [...] This needs roughly 14 min on kepler.SCHWINGE and 70 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 (`?`) one ("57 PIDs before" `expect [...] gdb.cp`). ## Analysis $ toolchain/logs/process gdb test * `gdb.base/attach-pie-misread.exp` Is only run for GNU/Linux; needs [[prelink]]. * Disabled * `gdb.base/readline.exp` [[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. * 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 * `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" TODO.