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https://sourceware.org/git/binutils-gdb.git
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268a13a5a3
This is the next patch in the ongoing series to move gdbsever to the top level. This patch just renames the "common" directory. The idea is to do this move in two parts: first rename the directory (this patch), then move the directory to the top. This approach makes the patches a bit more tractable. I chose the name "gdbsupport" for the directory. However, as this patch was largely written by sed, we could pick a new name without too much difficulty. Tested by the buildbot. gdb/ChangeLog 2019-07-09 Tom Tromey <tom@tromey.com> * contrib/ari/gdb_ari.sh: Change common to gdbsupport. * configure: Rebuild. * configure.ac: Change common to gdbsupport. * gdbsupport: Rename from common. * acinclude.m4: Change common to gdbsupport. * Makefile.in (CONFIG_SRC_SUBDIR, COMMON_SFILES) (HFILES_NO_SRCDIR, stamp-version, ALLDEPFILES): Change common to gdbsupport. * aarch64-tdep.c, ada-lang.c, ada-lang.h, agent.c, alloc.c, amd64-darwin-tdep.c, amd64-dicos-tdep.c, amd64-fbsd-nat.c, amd64-fbsd-tdep.c, amd64-linux-nat.c, amd64-linux-tdep.c, amd64-nbsd-tdep.c, amd64-obsd-tdep.c, amd64-sol2-tdep.c, amd64-tdep.c, amd64-windows-tdep.c, arch-utils.c, arch/aarch64-insn.c, arch/aarch64.c, arch/aarch64.h, arch/amd64.c, arch/amd64.h, arch/arm-get-next-pcs.c, arch/arm-linux.c, arch/arm.c, arch/i386.c, arch/i386.h, arch/ppc-linux-common.c, arch/riscv.c, arch/riscv.h, arch/tic6x.c, arm-tdep.c, auto-load.c, auxv.c, ax-gdb.c, ax-general.c, ax.h, breakpoint.c, breakpoint.h, btrace.c, btrace.h, build-id.c, build-id.h, c-lang.h, charset.c, charset.h, cli/cli-cmds.c, cli/cli-cmds.h, cli/cli-decode.c, cli/cli-dump.c, cli/cli-option.h, cli/cli-script.c, coff-pe-read.c, command.h, compile/compile-c-support.c, compile/compile-c.h, compile/compile-cplus-symbols.c, compile/compile-cplus-types.c, compile/compile-cplus.h, compile/compile-loc2c.c, compile/compile.c, completer.c, completer.h, contrib/ari/gdb_ari.sh, corefile.c, corelow.c, cp-support.c, cp-support.h, cp-valprint.c, csky-tdep.c, ctf.c, darwin-nat.c, debug.c, defs.h, disasm-selftests.c, disasm.c, disasm.h, dtrace-probe.c, dwarf-index-cache.c, dwarf-index-cache.h, dwarf-index-write.c, dwarf2-frame.c, dwarf2expr.c, dwarf2loc.c, dwarf2read.c, event-loop.c, event-top.c, exceptions.c, exec.c, extension.h, fbsd-nat.c, features/aarch64-core.c, features/aarch64-fpu.c, features/aarch64-pauth.c, features/aarch64-sve.c, features/i386/32bit-avx.c, features/i386/32bit-avx512.c, features/i386/32bit-core.c, features/i386/32bit-linux.c, features/i386/32bit-mpx.c, features/i386/32bit-pkeys.c, features/i386/32bit-segments.c, features/i386/32bit-sse.c, features/i386/64bit-avx.c, features/i386/64bit-avx512.c, features/i386/64bit-core.c, features/i386/64bit-linux.c, features/i386/64bit-mpx.c, features/i386/64bit-pkeys.c, features/i386/64bit-segments.c, features/i386/64bit-sse.c, features/i386/x32-core.c, features/riscv/32bit-cpu.c, features/riscv/32bit-csr.c, features/riscv/32bit-fpu.c, features/riscv/64bit-cpu.c, features/riscv/64bit-csr.c, features/riscv/64bit-fpu.c, features/tic6x-c6xp.c, features/tic6x-core.c, features/tic6x-gp.c, filename-seen-cache.h, findcmd.c, findvar.c, fork-child.c, gcore.c, gdb_bfd.c, gdb_bfd.h, gdb_proc_service.h, gdb_regex.c, gdb_select.h, gdb_usleep.c, gdbarch-selftests.c, gdbthread.h, gdbtypes.h, gnu-nat.c, go32-nat.c, guile/guile.c, guile/scm-ports.c, guile/scm-safe-call.c, guile/scm-type.c, i386-fbsd-nat.c, i386-fbsd-tdep.c, i386-go32-tdep.c, i386-linux-nat.c, i386-linux-tdep.c, i386-tdep.c, i387-tdep.c, ia64-libunwind-tdep.c, ia64-linux-nat.c, inf-child.c, inf-ptrace.c, infcall.c, infcall.h, infcmd.c, inferior-iter.h, inferior.c, inferior.h, inflow.c, inflow.h, infrun.c, infrun.h, inline-frame.c, language.h, linespec.c, linux-fork.c, linux-nat.c, linux-tdep.c, linux-thread-db.c, location.c, machoread.c, macrotab.h, main.c, maint.c, maint.h, memattr.c, memrange.h, mi/mi-cmd-break.h, mi/mi-cmd-env.c, mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-interp.c, mi/mi-main.c, mi/mi-parse.h, minsyms.c, mips-linux-tdep.c, namespace.h, nat/aarch64-linux-hw-point.c, nat/aarch64-linux-hw-point.h, nat/aarch64-linux.c, nat/aarch64-sve-linux-ptrace.c, nat/amd64-linux-siginfo.c, nat/fork-inferior.c, nat/linux-btrace.c, nat/linux-btrace.h, nat/linux-namespaces.c, nat/linux-nat.h, nat/linux-osdata.c, nat/linux-personality.c, nat/linux-procfs.c, nat/linux-ptrace.c, nat/linux-ptrace.h, nat/linux-waitpid.c, nat/mips-linux-watch.c, nat/mips-linux-watch.h, nat/ppc-linux.c, nat/x86-dregs.c, nat/x86-dregs.h, nat/x86-linux-dregs.c, nat/x86-linux.c, nto-procfs.c, nto-tdep.c, objfile-flags.h, objfiles.c, objfiles.h, obsd-nat.c, observable.h, osdata.c, p-valprint.c, parse.c, parser-defs.h, ppc-linux-nat.c, printcmd.c, probe.c, proc-api.c, procfs.c, producer.c, progspace.h, psymtab.h, python/py-framefilter.c, python/py-inferior.c, python/py-ref.h, python/py-type.c, python/python.c, record-btrace.c, record-full.c, record.c, record.h, regcache-dump.c, regcache.c, regcache.h, remote-fileio.c, remote-fileio.h, remote-sim.c, remote.c, riscv-tdep.c, rs6000-aix-tdep.c, rust-exp.y, s12z-tdep.c, selftest-arch.c, ser-base.c, ser-event.c, ser-pipe.c, ser-tcp.c, ser-unix.c, skip.c, solib-aix.c, solib-target.c, solib.c, source-cache.c, source.c, source.h, sparc-nat.c, spu-linux-nat.c, stack.c, stap-probe.c, symfile-add-flags.h, symfile.c, symfile.h, symtab.c, symtab.h, target-descriptions.c, target-descriptions.h, target-memory.c, target.c, target.h, target/waitstatus.c, target/waitstatus.h, thread-iter.h, thread.c, tilegx-tdep.c, top.c, top.h, tracefile-tfile.c, tracefile.c, tracepoint.c, tracepoint.h, tui/tui-io.c, ui-file.c, ui-out.h, unittests/array-view-selftests.c, unittests/child-path-selftests.c, unittests/cli-utils-selftests.c, unittests/common-utils-selftests.c, unittests/copy_bitwise-selftests.c, unittests/environ-selftests.c, unittests/format_pieces-selftests.c, unittests/function-view-selftests.c, unittests/lookup_name_info-selftests.c, unittests/memory-map-selftests.c, unittests/memrange-selftests.c, unittests/mkdir-recursive-selftests.c, unittests/observable-selftests.c, unittests/offset-type-selftests.c, unittests/optional-selftests.c, unittests/parse-connection-spec-selftests.c, unittests/ptid-selftests.c, unittests/rsp-low-selftests.c, unittests/scoped_fd-selftests.c, unittests/scoped_mmap-selftests.c, unittests/scoped_restore-selftests.c, unittests/string_view-selftests.c, unittests/style-selftests.c, unittests/tracepoint-selftests.c, unittests/unpack-selftests.c, unittests/utils-selftests.c, unittests/xml-utils-selftests.c, utils.c, utils.h, valarith.c, valops.c, valprint.c, value.c, value.h, varobj.c, varobj.h, windows-nat.c, x86-linux-nat.c, xml-support.c, xml-support.h, xml-tdesc.h, xstormy16-tdep.c, xtensa-linux-nat.c, dwarf2read.h: Change common to gdbsupport. gdb/gdbserver/ChangeLog 2019-07-09 Tom Tromey <tom@tromey.com> * configure: Rebuild. * configure.ac: Change common to gdbsupport. * acinclude.m4: Change common to gdbsupport. * Makefile.in (SFILES, OBS, GDBREPLAY_OBS, IPA_OBJS) (version-generated.c, gdbsupport/%-ipa.o, gdbsupport/%.o): Change common to gdbsupport. * ax.c, event-loop.c, fork-child.c, gdb_proc_service.h, gdbreplay.c, gdbthread.h, hostio-errno.c, hostio.c, i387-fp.c, inferiors.c, inferiors.h, linux-aarch64-tdesc-selftest.c, linux-amd64-ipa.c, linux-i386-ipa.c, linux-low.c, linux-tic6x-low.c, linux-x86-low.c, linux-x86-tdesc-selftest.c, linux-x86-tdesc.c, lynx-i386-low.c, lynx-low.c, mem-break.h, nto-x86-low.c, regcache.c, regcache.h, remote-utils.c, server.c, server.h, spu-low.c, symbol.c, target.h, tdesc.c, tdesc.h, thread-db.c, tracepoint.c, win32-i386-low.c, win32-low.c: Change common to gdbsupport.
220 lines
5.4 KiB
C
220 lines
5.4 KiB
C
/* Serial interface for a selectable event.
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Copyright (C) 2016-2019 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "ser-event.h"
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#include "serial.h"
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#include "gdbsupport/filestuff.h"
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/* On POSIX hosts, a serial_event is basically an abstraction for the
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classical self-pipe trick.
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On Windows, a serial_event is a wrapper around a native Windows
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event object. Because we want to interface with gdb_select, which
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takes file descriptors, we need to wrap that Windows event object
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in a file descriptor. As _open_osfhandle can not be used with
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event objects, we instead create a dummy file wrap that in a file
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descriptor with _open_osfhandle, and pass that as selectable
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descriptor to callers. As Windows' gdb_select converts file
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descriptors back to Windows handles by calling serial->wait_handle,
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nothing ever actually waits on that file descriptor. */
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struct serial_event_state
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{
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#ifdef USE_WIN32API
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/* The Windows event object, created with CreateEvent. */
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HANDLE event;
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#else
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/* The write side of the pipe. The read side is in
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serial->fd. */
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int write_fd;
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#endif
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};
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/* Open a new serial event. */
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static int
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serial_event_open (struct serial *scb, const char *name)
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{
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struct serial_event_state *state;
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state = XNEW (struct serial_event_state);
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scb->state = state;
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#ifndef USE_WIN32API
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{
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int fds[2];
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if (gdb_pipe_cloexec (fds) == -1)
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internal_error (__FILE__, __LINE__,
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"creating serial event pipe failed.");
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fcntl (fds[0], F_SETFL, O_NONBLOCK);
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fcntl (fds[1], F_SETFL, O_NONBLOCK);
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scb->fd = fds[0];
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state->write_fd = fds[1];
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}
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#else
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{
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/* A dummy file object that can be wrapped in a file descriptor.
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We don't need to store this handle because closing the file
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descriptor automatically closes this. */
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HANDLE dummy_file;
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/* A manual-reset event. */
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state->event = CreateEvent (0, TRUE, FALSE, 0);
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/* The dummy file handle. Created just so we have something
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wrappable in a file descriptor. */
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dummy_file = CreateFile ("nul", 0, 0, NULL, OPEN_EXISTING, 0, NULL);
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scb->fd = _open_osfhandle ((intptr_t) dummy_file, 0);
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}
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#endif
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return 0;
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}
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static void
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serial_event_close (struct serial *scb)
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{
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struct serial_event_state *state = (struct serial_event_state *) scb->state;
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close (scb->fd);
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#ifndef USE_WIN32API
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close (state->write_fd);
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#else
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CloseHandle (state->event);
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#endif
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scb->fd = -1;
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xfree (state);
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scb->state = NULL;
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}
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#ifdef USE_WIN32API
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/* Implementation of the wait_handle method. Returns the native
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Windows event object handle. */
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static void
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serial_event_wait_handle (struct serial *scb, HANDLE *read, HANDLE *except)
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{
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struct serial_event_state *state = (struct serial_event_state *) scb->state;
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*read = state->event;
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}
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#endif
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/* The serial_ops for struct serial_event objects. Note we never
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register this serial type with serial_add_interface, because this
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is internal implementation detail never to be used by remote
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targets for protocol transport. */
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static const struct serial_ops serial_event_ops =
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{
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"event",
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serial_event_open,
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serial_event_close,
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NULL, /* fdopen */
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NULL, /* readchar */
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NULL, /* write */
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NULL, /* flush_output */
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NULL, /* flush_input */
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NULL, /* send_break */
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NULL, /* go_raw */
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NULL, /* get_tty_state */
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NULL, /* copy_tty_state */
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NULL, /* set_tty_state */
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NULL, /* print_tty_state */
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NULL, /* setbaudrate */
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NULL, /* setstopbits */
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NULL, /* setparity */
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NULL, /* drain_output */
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NULL, /* async */
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NULL, /* read_prim */
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NULL, /* write_prim */
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NULL, /* avail */
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#ifdef USE_WIN32API
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serial_event_wait_handle,
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#endif
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};
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/* See ser-event.h. */
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struct serial_event *
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make_serial_event (void)
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{
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return (struct serial_event *) serial_open_ops (&serial_event_ops);
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}
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/* See ser-event.h. */
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int
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serial_event_fd (struct serial_event *event)
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{
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struct serial *ser = (struct serial *) event;
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return ser->fd;
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}
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/* See ser-event.h. */
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void
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serial_event_set (struct serial_event *event)
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{
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struct serial *ser = (struct serial *) event;
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struct serial_event_state *state = (struct serial_event_state *) ser->state;
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#ifndef USE_WIN32API
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int r;
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char c = '+'; /* Anything. */
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do
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{
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r = write (state->write_fd, &c, 1);
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}
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while (r < 0 && errno == EINTR);
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#else
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SetEvent (state->event);
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#endif
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}
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/* See ser-event.h. */
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void
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serial_event_clear (struct serial_event *event)
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{
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struct serial *ser = (struct serial *) event;
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#ifndef USE_WIN32API
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int r;
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do
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{
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char c;
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r = read (ser->fd, &c, 1);
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}
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while (r > 0 || (r < 0 && errno == EINTR));
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#else
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struct serial_event_state *state = (struct serial_event_state *) ser->state;
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ResetEvent (state->event);
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#endif
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}
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