From: Tom Tromey Date: Wed, 8 Apr 2020 20:33:35 +0000 (-0600) Subject: Share Windows thread-suspend and -resume code X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=98a032873232f9685dc7a5d632481c1488b9f1c5;p=binutils-gdb.git Share Windows thread-suspend and -resume code This adds "suspend" and "resume" methods to windows_thread_info, and changes gdb and gdbserver to share this code. gdb/ChangeLog 2020-04-08 Tom Tromey * windows-nat.c (thread_rec): Use windows_thread_info::suspend. (windows_continue): Use windows_continue::resume. * nat/windows-nat.h (struct windows_thread_info) : Declare new methods. * nat/windows-nat.c: New file. * configure.nat (NATDEPFILES): Add nat/windows-nat.o when needed. gdbserver/ChangeLog 2020-04-08 Tom Tromey * win32-low.c (win32_require_context, suspend_one_thread): Use windows_thread_info::suspend. (continue_one_thread): Use windows_thread_info::resume. * configure.srv (srv_tgtobj): Add windows-nat.o when needed. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index c9885942a71..bf1ef5b9d8c 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,12 @@ +2020-04-08 Tom Tromey + + * windows-nat.c (thread_rec): Use windows_thread_info::suspend. + (windows_continue): Use windows_continue::resume. + * nat/windows-nat.h (struct windows_thread_info) : Declare new methods. + * nat/windows-nat.c: New file. + * configure.nat (NATDEPFILES): Add nat/windows-nat.o when needed. + 2020-04-08 Tom Tromey * windows-nat.c (windows_add_thread, windows_delete_thread) diff --git a/gdb/configure.nat b/gdb/configure.nat index 83ffdb80486..6ea25834954 100644 --- a/gdb/configure.nat +++ b/gdb/configure.nat @@ -75,10 +75,10 @@ case ${gdb_host} in NATDEPFILES='fork-child.o nat/fork-inferior.o inf-ptrace.o' ;; cygwin*) - NATDEPFILES='x86-nat.o nat/x86-dregs.o windows-nat.o' + NATDEPFILES='x86-nat.o nat/x86-dregs.o windows-nat.o nat/windows-nat.o' ;; mingw*) - NATDEPFILES='x86-nat.o nat/x86-dregs.o windows-nat.o' + NATDEPFILES='x86-nat.o nat/x86-dregs.o windows-nat.o nat/windows-nat.o' ;; aix) NATDEPFILES='nat/fork-inferior.o fork-child.o inf-ptrace.o' diff --git a/gdb/nat/windows-nat.c b/gdb/nat/windows-nat.c new file mode 100644 index 00000000000..a98ff421e6f --- /dev/null +++ b/gdb/nat/windows-nat.c @@ -0,0 +1,60 @@ +/* Internal interfaces for the Windows code + Copyright (C) 1995-2019 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +#include "gdbsupport/common-defs.h" +#include "nat/windows-nat.h" + +void +windows_thread_info::suspend () +{ + if (suspended != 0) + return; + + if (SuspendThread (h) == (DWORD) -1) + { + DWORD err = GetLastError (); + + /* We get Access Denied (5) when trying to suspend + threads that Windows started on behalf of the + debuggee, usually when those threads are just + about to exit. + We can get Invalid Handle (6) if the main thread + has exited. */ + if (err != ERROR_INVALID_HANDLE && err != ERROR_ACCESS_DENIED) + warning (_("SuspendThread (tid=0x%x) failed. (winerr %u)"), + (unsigned) tid, (unsigned) err); + suspended = -1; + } + else + suspended = 1; +} + +void +windows_thread_info::resume () +{ + if (suspended > 0) + { + if (ResumeThread (h) == (DWORD) -1) + { + DWORD err = GetLastError (); + warning (_("warning: ResumeThread (tid=0x%x) failed. (winerr %u)"), + (unsigned) tid, (unsigned) err); + } + } + suspended = 0; +} diff --git a/gdb/nat/windows-nat.h b/gdb/nat/windows-nat.h index 543de895e77..695f801c58f 100644 --- a/gdb/nat/windows-nat.h +++ b/gdb/nat/windows-nat.h @@ -34,6 +34,12 @@ struct windows_thread_info DISABLE_COPY_AND_ASSIGN (windows_thread_info); + /* Ensure that this thread has been suspended. */ + void suspend (); + + /* Resume the thread if it has been suspended. */ + void resume (); + /* The Win32 thread identifier. */ DWORD tid; diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c index d2e900c2387..da3579942f1 100644 --- a/gdb/windows-nat.c +++ b/gdb/windows-nat.c @@ -416,27 +416,7 @@ thread_rec (DWORD id, int get_context) if (!th->suspended && get_context) { if (get_context > 0 && id != current_event.dwThreadId) - { - if (SuspendThread (th->h) == (DWORD) -1) - { - DWORD err = GetLastError (); - - /* We get Access Denied (5) when trying to suspend - threads that Windows started on behalf of the - debuggee, usually when those threads are just - about to exit. - We can get Invalid Handle (6) if the main thread - has exited. */ - if (err != ERROR_INVALID_HANDLE - && err != ERROR_ACCESS_DENIED) - warning (_("SuspendThread (tid=0x%x) failed." - " (winerr %u)"), - (unsigned) id, (unsigned) err); - th->suspended = -1; - } - else - th->suspended = 1; - } + th->suspend (); else if (get_context < 0) th->suspended = -1; th->reload_context = true; @@ -1515,9 +1495,7 @@ windows_continue (DWORD continue_status, int id, int killed) th->context.ContextFlags = 0; } } - if (th->suspended > 0) - (void) ResumeThread (th->h); - th->suspended = 0; + th->resume (); } res = ContinueDebugEvent (current_event.dwProcessId, diff --git a/gdbserver/ChangeLog b/gdbserver/ChangeLog index 25b57685d22..29d176071ca 100644 --- a/gdbserver/ChangeLog +++ b/gdbserver/ChangeLog @@ -1,3 +1,10 @@ +2020-04-08 Tom Tromey + + * win32-low.c (win32_require_context, suspend_one_thread): Use + windows_thread_info::suspend. + (continue_one_thread): Use windows_thread_info::resume. + * configure.srv (srv_tgtobj): Add windows-nat.o when needed. + 2020-04-08 Tom Tromey * win32-i386-low.c (update_debug_registers) diff --git a/gdbserver/configure.srv b/gdbserver/configure.srv index ecdd63a310a..7acf229fbef 100644 --- a/gdbserver/configure.srv +++ b/gdbserver/configure.srv @@ -74,7 +74,7 @@ case "${gdbserver_host}" in srv_linux_thread_db=yes ;; arm*-*-mingw32ce*) srv_regobj=reg-arm.o - srv_tgtobj="win32-low.o win32-arm-low.o" + srv_tgtobj="win32-low.o windows-nat.o win32-arm-low.o" srv_tgtobj="${srv_tgtobj} wincecompat.o" # hostio_last_error implementation is in win32-low.c srv_hostio_err_objs="" @@ -99,6 +99,7 @@ case "${gdbserver_host}" in i[34567]86-*-cygwin*) srv_regobj="" srv_tgtobj="x86-low.o nat/x86-dregs.o win32-low.o" srv_tgtobj="${srv_tgtobj} win32-i386-low.o" + srv_tgtobj="${srv_tgtobj} nat/windows-nat.o" srv_tgtobj="${srv_tgtobj} arch/i386.o" ;; i[34567]86-*-linux*) srv_tgtobj="${srv_tgtobj} arch/i386.o" @@ -126,6 +127,7 @@ case "${gdbserver_host}" in srv_regobj="" srv_tgtobj="x86-low.o nat/x86-dregs.o win32-low.o" srv_tgtobj="${srv_tgtobj} win32-i386-low.o" + srv_tgtobj="${srv_tgtobj} nat/windows-nat.o" srv_tgtobj="${srv_tgtobj} arch/i386.o" srv_tgtobj="${srv_tgtobj} wincecompat.o" # hostio_last_error implementation is in win32-low.c @@ -136,6 +138,7 @@ case "${gdbserver_host}" in i[34567]86-*-mingw*) srv_regobj="" srv_tgtobj="x86-low.o nat/x86-dregs.o win32-low.o" srv_tgtobj="${srv_tgtobj} win32-i386-low.o" + srv_tgtobj="${srv_tgtobj} nat/windows-nat.o" srv_tgtobj="${srv_tgtobj} arch/i386.o" srv_mingw=yes ;; @@ -393,12 +396,14 @@ case "${gdbserver_host}" in x86_64-*-mingw*) srv_regobj="" srv_tgtobj="x86-low.o nat/x86-dregs.o i387-fp.o" srv_tgtobj="${srv_tgtobj} win32-low.o win32-i386-low.o" + srv_tgtobj="${srv_tgtobj} nat/windows-nat.o" srv_tgtobj="${srv_tgtobj} arch/amd64.o" srv_mingw=yes ;; x86_64-*-cygwin*) srv_regobj="" srv_tgtobj="x86-low.o nat/x86-dregs.o i387-fp.o" srv_tgtobj="${srv_tgtobj} win32-low.o win32-i386-low.o" + srv_tgtobj="${srv_tgtobj} nat/windows-nat.o" srv_tgtobj="${srv_tgtobj} arch/amd64.o" ;; diff --git a/gdbserver/win32-low.cc b/gdbserver/win32-low.cc index 1284ed177cb..7cad640878f 100644 --- a/gdbserver/win32-low.cc +++ b/gdbserver/win32-low.cc @@ -171,18 +171,7 @@ win32_require_context (windows_thread_info *th) { if (th->context.ContextFlags == 0) { - if (!th->suspended) - { - if (SuspendThread (th->h) == (DWORD) -1) - { - DWORD err = GetLastError (); - OUTMSG (("warning: SuspendThread failed in thread_rec, " - "(error %d): %s\n", (int) err, strwinerror (err))); - } - else - th->suspended = 1; - } - + th->suspend (); win32_get_thread_context (th); } } @@ -435,13 +424,7 @@ continue_one_thread (thread_info *thread, int thread_id) th->context.ContextFlags = 0; } - if (ResumeThread (th->h) == (DWORD) -1) - { - DWORD err = GetLastError (); - OUTMSG (("warning: ResumeThread failed in continue_one_thread, " - "(error %d): %s\n", (int) err, strwinerror (err))); - } - th->suspended = 0; + th->resume (); } } } @@ -1348,17 +1331,7 @@ suspend_one_thread (thread_info *thread) { windows_thread_info *th = (windows_thread_info *) thread_target_data (thread); - if (!th->suspended) - { - if (SuspendThread (th->h) == (DWORD) -1) - { - DWORD err = GetLastError (); - OUTMSG (("warning: SuspendThread failed in suspend_one_thread, " - "(error %d): %s\n", (int) err, strwinerror (err))); - } - else - th->suspended = 1; - } + th->suspend (); } static void