mirror of
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.
283 lines
6.5 KiB
C
283 lines
6.5 KiB
C
/* Shared utility routines for GDB to interact with agent.
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Copyright (C) 2009-2019 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 "common-defs.h"
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#include "target/target.h"
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#include "gdbsupport/symbol.h"
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#include <unistd.h>
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#include "filestuff.h"
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#define IPA_SYM_STRUCT_NAME ipa_sym_addresses_common
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#include "agent.h"
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int debug_agent = 0;
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/* A stdarg wrapper for debug_vprintf. */
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static void ATTRIBUTE_PRINTF (1, 2)
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debug_agent_printf (const char *fmt, ...)
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{
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va_list ap;
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if (!debug_agent)
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return;
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va_start (ap, fmt);
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debug_vprintf (fmt, ap);
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va_end (ap);
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}
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#define DEBUG_AGENT debug_agent_printf
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/* Global flag to determine using agent or not. */
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int use_agent = 0;
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/* Addresses of in-process agent's symbols both GDB and GDBserver cares
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about. */
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struct ipa_sym_addresses_common
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{
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CORE_ADDR addr_helper_thread_id;
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CORE_ADDR addr_cmd_buf;
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CORE_ADDR addr_capability;
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};
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/* Cache of the helper thread id. FIXME: this global should be made
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per-process. */
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static uint32_t helper_thread_id = 0;
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static struct
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{
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const char *name;
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int offset;
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} symbol_list[] = {
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IPA_SYM(helper_thread_id),
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IPA_SYM(cmd_buf),
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IPA_SYM(capability),
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};
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static struct ipa_sym_addresses_common ipa_sym_addrs;
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static int all_agent_symbols_looked_up = 0;
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int
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agent_loaded_p (void)
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{
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return all_agent_symbols_looked_up;
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}
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/* Look up all symbols needed by agent. Return 0 if all the symbols are
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found, return non-zero otherwise. */
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int
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agent_look_up_symbols (void *arg)
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{
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int i;
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all_agent_symbols_looked_up = 0;
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for (i = 0; i < sizeof (symbol_list) / sizeof (symbol_list[0]); i++)
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{
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CORE_ADDR *addrp =
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(CORE_ADDR *) ((char *) &ipa_sym_addrs + symbol_list[i].offset);
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struct objfile *objfile = (struct objfile *) arg;
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if (find_minimal_symbol_address (symbol_list[i].name, addrp,
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objfile) != 0)
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{
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DEBUG_AGENT ("symbol `%s' not found\n", symbol_list[i].name);
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return -1;
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}
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}
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all_agent_symbols_looked_up = 1;
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return 0;
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}
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static unsigned int
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agent_get_helper_thread_id (void)
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{
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if (helper_thread_id == 0)
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{
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if (target_read_uint32 (ipa_sym_addrs.addr_helper_thread_id,
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&helper_thread_id))
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warning (_("Error reading helper thread's id in lib"));
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}
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return helper_thread_id;
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}
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#ifdef HAVE_SYS_UN_H
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#include <sys/socket.h>
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#include <sys/un.h>
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#define SOCK_DIR P_tmpdir
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#ifndef UNIX_PATH_MAX
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#define UNIX_PATH_MAX sizeof(((struct sockaddr_un *) NULL)->sun_path)
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#endif
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#endif
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/* Connects to synchronization socket. PID is the pid of inferior, which is
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used to set up the connection socket. */
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static int
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gdb_connect_sync_socket (int pid)
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{
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#ifdef HAVE_SYS_UN_H
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struct sockaddr_un addr;
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int res, fd;
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char path[UNIX_PATH_MAX];
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res = xsnprintf (path, UNIX_PATH_MAX, "%s/gdb_ust%d", P_tmpdir, pid);
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if (res >= UNIX_PATH_MAX)
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return -1;
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res = fd = gdb_socket_cloexec (PF_UNIX, SOCK_STREAM, 0);
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if (res == -1)
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{
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warning (_("error opening sync socket: %s"), strerror (errno));
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return -1;
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}
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addr.sun_family = AF_UNIX;
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res = xsnprintf (addr.sun_path, UNIX_PATH_MAX, "%s", path);
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if (res >= UNIX_PATH_MAX)
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{
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warning (_("string overflow allocating socket name"));
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close (fd);
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return -1;
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}
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res = connect (fd, (struct sockaddr *) &addr, sizeof (addr));
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if (res == -1)
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{
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warning (_("error connecting sync socket (%s): %s. "
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"Make sure the directory exists and that it is writable."),
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path, strerror (errno));
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close (fd);
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return -1;
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}
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return fd;
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#else
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return -1;
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#endif
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}
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/* Execute an agent command in the inferior. PID is the value of pid of the
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inferior. CMD is the buffer for command. GDB or GDBserver will store the
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command into it and fetch the return result from CMD. The interaction
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between GDB/GDBserver and the agent is synchronized by a synchronization
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socket. Return zero if success, otherwise return non-zero. */
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int
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agent_run_command (int pid, const char *cmd, int len)
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{
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int fd;
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int tid = agent_get_helper_thread_id ();
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ptid_t ptid = ptid_t (pid, tid, 0);
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int ret = target_write_memory (ipa_sym_addrs.addr_cmd_buf,
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(gdb_byte *) cmd, len);
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if (ret != 0)
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{
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warning (_("unable to write"));
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return -1;
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}
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DEBUG_AGENT ("agent: resumed helper thread\n");
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/* Resume helper thread. */
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target_continue_no_signal (ptid);
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fd = gdb_connect_sync_socket (pid);
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if (fd >= 0)
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{
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char buf[1] = "";
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DEBUG_AGENT ("agent: signalling helper thread\n");
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do
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{
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ret = write (fd, buf, 1);
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} while (ret == -1 && errno == EINTR);
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DEBUG_AGENT ("agent: waiting for helper thread's response\n");
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do
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{
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ret = read (fd, buf, 1);
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} while (ret == -1 && errno == EINTR);
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close (fd);
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DEBUG_AGENT ("agent: helper thread's response received\n");
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}
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else
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return -1;
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/* Need to read response with the inferior stopped. */
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if (ptid != null_ptid)
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{
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/* Stop thread PTID. */
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DEBUG_AGENT ("agent: stop helper thread\n");
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target_stop_and_wait (ptid);
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}
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if (fd >= 0)
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{
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if (target_read_memory (ipa_sym_addrs.addr_cmd_buf, (gdb_byte *) cmd,
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IPA_CMD_BUF_SIZE))
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{
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warning (_("Error reading command response"));
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return -1;
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}
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}
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return 0;
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}
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/* Each bit of it stands for a capability of agent. */
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static uint32_t agent_capability = 0;
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/* Return true if agent has capability AGENT_CAP, otherwise return false. */
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int
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agent_capability_check (enum agent_capa agent_capa)
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{
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if (agent_capability == 0)
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{
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if (target_read_uint32 (ipa_sym_addrs.addr_capability,
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&agent_capability))
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warning (_("Error reading capability of agent"));
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}
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return agent_capability & agent_capa;
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}
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/* Invalidate the cache of agent capability, so we'll read it from inferior
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again. Call it when launches a new program or reconnect to remote stub. */
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void
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agent_capability_invalidate (void)
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{
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agent_capability = 0;
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}
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