[Valgrind-developers] strange bugs introduced by gdbserver

[Christian B. <bor...@de...>]

Philippe,

can you look into this? 

when running a current valgrind on its own configure script I get errors like:
 ./vg-in-place --trace-children=yes --tool=none ./configure
[...]

valgrind: m_libcfile.c:73 (vgPlain_safe_fd): Assertion 'newfd >= VG_(fd_hard_limit)' failed.
==20033==    at 0x3807F5DD: report_and_quit (m_libcassert.c:210)
==20033==    by 0x3807F7A7: vgPlain_assert_fail (m_libcassert.c:284)
==20033==    by 0x380807E8: vgPlain_safe_fd (m_libcfile.c:73)
==20033==    by 0x3803A27A: open_fifo (remote-utils.c:75)
==20033==    by 0x3803B504: remote_open (remote-utils.c:306)
==20033==    by 0x38038844: call_gdbserver (m_gdbserver.c:614)
==20033==    by 0x38039138: vgPlain_gdbserver_activity (m_gdbserver.c:826)
==20033==    by 0x380394EA: vgPlain_gdbserver_prerun_action (m_gdbserver.c:529)
==20033==    by 0x38039648: gdbserver_cleanup_in_child_after_fork (m_gdbserver.c:564)
==20033==    by 0x38081FEA: vgPlain_do_atfork_child (m_libcproc.c:749)
==20033==    by 0x3807068A: vgModuleLocal_do_fork_clone (syswrap-linux.c:369)
==20033==    by 0x380776D9: vgSysWrap_x86_linux_sys_clone_before (syswrap-x86-linux.c:945)
==20033==    by 0x38045143: vgPlain_client_syscall (syswrap-main.c:1498)
==20033==    by 0x38041452: handle_syscall (scheduler.c:952)
==20033==    by 0x38042616: vgPlain_scheduler (scheduler.c:1196)
==20033==    by 0x38070794: run_a_thread_NORETURN (syswrap-linux.c:95)

sched status:
  running_tid=1

Thread 1: status = VgTs_Runnable
==20033==    at 0x4109DD7: fork (fork.c:130)
==20033==    by 0x8087A61: make_child (in /bin/bash)
==20033==    by 0x807AB69: ??? (in /bin/bash)
==20033==    by 0x8077927: execute_command_internal (in /bin/bash)
==20033==    by 0x8078742: execute_command (in /bin/bash)
==20033==    by 0x8077FD7: execute_command_internal (in /bin/bash)
==20033==    by 0x807B531: ??? (in /bin/bash)
==20033==    by 0x80785F7: execute_command_internal (in /bin/bash)
==20033==    by 0x8076DA6: ??? (in /bin/bash)
==20033==    by 0x80783F1: execute_command_internal (in /bin/bash)
==20033==    by 0x80B822D: parse_and_execute (in /bin/bash)
==20033==    by 0x808E0FC: command_substitute (in /bin/bash)
==20033==    by 0x8092633: ??? (in /bin/bash)
==20033==    by 0x80940BD: ??? (in /bin/bash)
==20033==    by 0x809437C: ??? (in /bin/bash)
==20033==    by 0x80943D9: expand_string (in /bin/bash)
==20033==    by 0x80AEB2B: ??? (in /bin/bash)
==20033==    by 0x80AF786: do_redirections (in /bin/bash)
==20033==    by 0x807AA51: ??? (in /bin/bash)
==20033==    by 0x8077927: execute_command_internal (in /bin/bash)
==20033==    by 0x8078742: execute_command (in /bin/bash)
==20033==    by 0x8078278: execute_command_internal (in /bin/bash)
==20033==    by 0x8078742: execute_command (in /bin/bash)
==20033==    by 0x8078278: execute_command_internal (in /bin/bash)
==20033==    by 0x8078742: execute_command (in /bin/bash)
==20033==    by 0x8078278: execute_command_internal (in /bin/bash)
==20033==    by 0x8078742: execute_command (in /bin/bash)
==20033==    by 0x8078278: execute_command_internal (in /bin/bash)
==20033==    by 0x80777C8: execute_command_internal (in /bin/bash)
==20033==    by 0x8078742: execute_command (in /bin/bash)
==20033==    by 0x8064C7E: reader_loop (in /bin/bash)
==20033==    by 0x80642F4: main (in /bin/bash)