mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-06 16:54:19 +08:00
a068643d69
Currently the target pid_to_str method returns a const char *, so many implementations have a static buffer that they update. This patch changes these methods to return a std::string instead. I think this is cleaner and avoids possible gotchas when calling pid_to_str on different ptids in a single statement. (Though no such calls exist currently.) This also updates various helper functions, and the gdbarch pid_to_str methods. I also made a best effort to fix all the callers, but I can't build some of the *-nat.c files. Tested by the buildbot. gdb/ChangeLog 2019-03-13 Tom Tromey <tromey@adacore.com> * i386-gnu-nat.c (i386_gnu_nat_target::fetch_registers) (i386_gnu_nat_target::store_registers): Update. * target-debug.h (target_debug_print_std_string): New macro. * x86-linux-nat.c (x86_linux_nat_target::enable_btrace): Update. * windows-tdep.c (display_one_tib): Update. * tui/tui-stack.c (tui_make_status_line): Update. * top.c (print_inferior_quit_action): Update. * thread.c (thr_try_catch_cmd): Update. (add_thread_with_info): Update. (thread_target_id_str): Update. (thr_try_catch_cmd): Update. (thread_command): Update. (thread_find_command): Update. * record-btrace.c (record_btrace_target::info_record) (record_btrace_resume_thread, record_btrace_target::resume) (record_btrace_cancel_resume, record_btrace_step_thread) (record_btrace_target::wait, record_btrace_target::wait) (record_btrace_target::wait, record_btrace_target::stop): Update. * progspace.c (print_program_space): Update. * process-stratum-target.c (process_stratum_target::thread_address_space): Update. * linux-fork.c (linux_fork_mourn_inferior) (detach_checkpoint_command, info_checkpoints_command) (linux_fork_context): Update. (linux_fork_detach): Update. (class scoped_switch_fork_info): Update. (delete_checkpoint_command): Update. * infrun.c (follow_fork_inferior): Update. (follow_fork_inferior): Update. (proceed_after_vfork_done): Update. (handle_vfork_child_exec_or_exit): Update. (follow_exec): Update. (displaced_step_prepare_throw): Update. (displaced_step_restore): Update. (start_step_over): Update. (resume_1): Update. (clear_proceed_status_thread): Update. (proceed): Update. (print_target_wait_results): Update. (do_target_wait): Update. (context_switch): Update. (stop_all_threads): Update. (restart_threads): Update. (finish_step_over): Update. (handle_signal_stop): Update. (switch_back_to_stepped_thread): Update. (keep_going_pass_signal): Update. (print_exited_reason): Update. (normal_stop): Update. * inferior.c (inferior_pid_to_str): Change return type. (print_selected_inferior): Update. (add_inferior): Update. (detach_inferior): Update. * dummy-frame.c (fprint_dummy_frames): Update. * dcache.c (dcache_info_1): Update. * btrace.c (btrace_enable, btrace_disable, btrace_teardown) (btrace_fetch, btrace_clear): Update. * linux-tdep.c (linux_core_pid_to_str): Change return type. * i386-cygwin-tdep.c (i386_windows_core_pid_to_str): Change return type. * fbsd-tdep.c (fbsd_core_pid_to_str): Change return type. * sol2-tdep.h (sol2_core_pid_to_str): Change return type. * sol2-tdep.c (sol2_core_pid_to_str): Change return type. * gdbarch.c, gdbarch.h: Rebuild. * gdbarch.sh (core_pid_to_str): Change return type. * windows-nat.c (struct windows_nat_target) <pid_to_str>: Change return type. (windows_nat_target::pid_to_str): Change return type. (windows_delete_thread): Update. (windows_nat_target::attach): Update. (windows_nat_target::files_info): Update. * target-delegates.c: Rebuild. * sol-thread.c (class sol_thread_target) <pid_to_str>: Change return type. (sol_thread_target::pid_to_str): Change return type. * remote.c (class remote_target) <pid_to_str>: Change return type. (remote_target::pid_to_str): Change return type. (extended_remote_target::attach, remote_target::remote_stop_ns) (remote_target::remote_notif_remove_queued_reply) (remote_target::push_stop_reply, remote_target::disable_btrace): Update. (extended_remote_target::attach): Update. * remote-sim.c (struct gdbsim_target) <pid_to_str>: Change return type. (gdbsim_target::pid_to_str): Change return type. * ravenscar-thread.c (struct ravenscar_thread_target) <pid_to_str>: Change return type. (ravenscar_thread_target::pid_to_str): Change return type. * procfs.c (class procfs_target) <pid_to_str>: Change return type. (procfs_target::pid_to_str): Change return type. (procfs_target::attach): Update. (procfs_target::detach): Update. (procfs_target::fetch_registers): Update. (procfs_target::store_registers): Update. (procfs_target::wait): Update. (procfs_target::files_info): Update. * obsd-nat.c (obsd_nat_target::pid_to_str): Change return type. * nto-procfs.c (struct nto_procfs_target) <pid_to_str>: Change return type. (nto_procfs_target::pid_to_str): Change return type. (nto_procfs_target::files_info, nto_procfs_target::attach): Update. * linux-thread-db.c (class thread_db_target) <pid_to_str>: Change return type. * linux-nat.c (linux_nat_target::pid_to_str): Change return type. (exit_lwp): Update. (attach_proc_task_lwp_callback, get_detach_signal) (detach_one_lwp, resume_lwp, linux_nat_target::resume) (linux_nat_target::resume, wait_lwp, stop_callback) (maybe_clear_ignore_sigint, stop_wait_callback, status_callback) (save_stop_reason, select_event_lwp, linux_nat_filter_event) (linux_nat_wait_1, resume_stopped_resumed_lwps) (linux_nat_target::wait, linux_nat_stop_lwp): Update. * inf-ptrace.c (inf_ptrace_target::pid_to_str): Change return type. (inf_ptrace_target::attach): Update. (inf_ptrace_target::files_info): Update. * go32-nat.c (struct go32_nat_target) <pid_to_str>: Change return type. (go32_nat_target::pid_to_str): Change return type. * gnu-nat.c (gnu_nat_target::pid_to_str): Change return type. (gnu_nat_target::wait): Update. (gnu_nat_target::wait): Update. (gnu_nat_target::resume): Update. * fbsd-nat.c (fbsd_nat_target::pid_to_str): Change return type. (fbsd_nat_target::wait): Update. * darwin-nat.c (darwin_nat_target::pid_to_str): Change return type. (darwin_nat_target::attach): Update. * corelow.c (class core_target) <pid_to_str>: Change return type. (core_target::pid_to_str): Change return type. * target.c (normal_pid_to_str): Change return type. (default_pid_to_str): Likewise. (target_pid_to_str): Change return type. (target_translate_tls_address): Update. (target_announce_detach): Update. * bsd-uthread.c (struct bsd_uthread_target) <pid_to_str>: Change return type. (bsd_uthread_target::pid_to_str): Change return type. * bsd-kvm.c (class bsd_kvm_target) <pid_to_str>: Change return type. (bsd_kvm_target::pid_to_str): Change return type. * aix-thread.c (class aix_thread_target) <pid_to_str>: Change return type. (aix_thread_target::pid_to_str): Change return type. * target.h (struct target_ops) <pid_to_str>: Change return type. (target_pid_to_str, normal_pid_to_str): Likewise. * obsd-nat.h (class obsd_nat_target) <pid_to_str>: Change return type. * linux-nat.h (class linux_nat_target) <pid_to_str>: Change return type. * inf-ptrace.h (struct inf_ptrace_target) <pid_to_str>: Change return type. * gnu-nat.h (struct gnu_nat_target) <pid_to_str>: Change return type. * fbsd-nat.h (class fbsd_nat_target) <pid_to_str>: Change return type. * darwin-nat.h (class darwin_nat_target) <pid_to_str>: Change return type.
444 lines
12 KiB
C
444 lines
12 KiB
C
/* Low level interface to i386 running the GNU Hurd.
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Copyright (C) 1992-2019 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 this first, to pick up the <mach.h> 'thread_info' diversion. */
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#include "gnu-nat.h"
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/* Mach/Hurd headers are not yet ready for C++ compilation. */
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extern "C"
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{
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#include <mach.h>
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#include <mach_error.h>
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#include <mach/message.h>
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#include <mach/exception.h>
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}
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#include "defs.h"
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#include "x86-nat.h"
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#include "inferior.h"
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#include "floatformat.h"
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#include "regcache.h"
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#include "i386-tdep.h"
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#include "inf-child.h"
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#include "i387-tdep.h"
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/* Offset to the thread_state_t location where REG is stored. */
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#define REG_OFFSET(reg) offsetof (struct i386_thread_state, reg)
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/* At REG_OFFSET[N] is the offset to the thread_state_t location where
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the GDB register N is stored. */
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static int reg_offset[] =
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{
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REG_OFFSET (eax), REG_OFFSET (ecx), REG_OFFSET (edx), REG_OFFSET (ebx),
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REG_OFFSET (uesp), REG_OFFSET (ebp), REG_OFFSET (esi), REG_OFFSET (edi),
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REG_OFFSET (eip), REG_OFFSET (efl), REG_OFFSET (cs), REG_OFFSET (ss),
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REG_OFFSET (ds), REG_OFFSET (es), REG_OFFSET (fs), REG_OFFSET (gs)
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};
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#define REG_ADDR(state, regnum) ((char *)(state) + reg_offset[regnum])
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/* The i386 GNU Hurd target. */
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#ifdef i386_DEBUG_STATE
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using gnu_base_target = x86_nat_target<gnu_nat_target>;
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#else
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using gnu_base_target = gnu_nat_target;
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#endif
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struct i386_gnu_nat_target final : public gnu_base_target
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{
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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};
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static i386_gnu_nat_target the_i386_gnu_nat_target;
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/* Get the whole floating-point state of THREAD and record the values
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of the corresponding (pseudo) registers. */
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static void
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fetch_fpregs (struct regcache *regcache, struct proc *thread)
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{
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mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT;
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struct i386_float_state state;
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kern_return_t err;
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err = thread_get_state (thread->port, i386_FLOAT_STATE,
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(thread_state_t) &state, &count);
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if (err)
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{
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warning (_("Couldn't fetch floating-point state from %s"),
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proc_string (thread));
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return;
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}
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if (!state.initialized)
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{
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/* The floating-point state isn't initialized. */
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i387_supply_fsave (regcache, -1, NULL);
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}
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else
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{
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/* Supply the floating-point registers. */
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i387_supply_fsave (regcache, -1, state.hw_state);
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}
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}
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/* Fetch register REGNO, or all regs if REGNO is -1. */
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void
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i386_gnu_nat_target::fetch_registers (struct regcache *regcache, int regno)
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{
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struct proc *thread;
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ptid_t ptid = regcache->ptid ();
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/* Make sure we know about new threads. */
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inf_update_procs (gnu_current_inf);
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thread = inf_tid_to_thread (gnu_current_inf, ptid.lwp ());
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if (!thread)
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error (_("Can't fetch registers from thread %s: No such thread"),
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target_pid_to_str (ptid).c_str ());
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if (regno < I386_NUM_GREGS || regno == -1)
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{
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thread_state_t state;
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/* This does the dirty work for us. */
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state = proc_get_state (thread, 0);
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if (!state)
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{
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warning (_("Couldn't fetch registers from %s"),
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proc_string (thread));
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return;
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}
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if (regno == -1)
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{
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int i;
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proc_debug (thread, "fetching all register");
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for (i = 0; i < I386_NUM_GREGS; i++)
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regcache->raw_supply (i, REG_ADDR (state, i));
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thread->fetched_regs = ~0;
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}
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else
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{
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proc_debug (thread, "fetching register %s",
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gdbarch_register_name (regcache->arch (),
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regno));
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regcache->raw_supply (regno, REG_ADDR (state, regno));
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thread->fetched_regs |= (1 << regno);
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}
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}
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if (regno >= I386_NUM_GREGS || regno == -1)
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{
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proc_debug (thread, "fetching floating-point registers");
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fetch_fpregs (regcache, thread);
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}
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}
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/* Store the whole floating-point state into THREAD using information
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from the corresponding (pseudo) registers. */
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static void
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store_fpregs (const struct regcache *regcache, struct proc *thread, int regno)
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{
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mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT;
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struct i386_float_state state;
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kern_return_t err;
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err = thread_get_state (thread->port, i386_FLOAT_STATE,
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(thread_state_t) &state, &count);
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if (err)
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{
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warning (_("Couldn't fetch floating-point state from %s"),
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proc_string (thread));
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return;
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}
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/* FIXME: kettenis/2001-07-15: Is this right? Should we somehow
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take into account DEPRECATED_REGISTER_VALID like the old code did? */
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i387_collect_fsave (regcache, regno, state.hw_state);
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err = thread_set_state (thread->port, i386_FLOAT_STATE,
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(thread_state_t) &state, i386_FLOAT_STATE_COUNT);
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if (err)
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{
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warning (_("Couldn't store floating-point state into %s"),
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proc_string (thread));
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return;
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}
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}
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/* Store at least register REGNO, or all regs if REGNO == -1. */
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void
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i386_gnu_nat_target::store_registers (struct regcache *regcache, int regno)
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{
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struct proc *thread;
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struct gdbarch *gdbarch = regcache->arch ();
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ptid_t ptid = regcache->ptid ();
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/* Make sure we know about new threads. */
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inf_update_procs (gnu_current_inf);
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thread = inf_tid_to_thread (gnu_current_inf, ptid.lwp ());
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if (!thread)
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error (_("Couldn't store registers into thread %s: No such thread"),
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target_pid_to_str (ptid).c_str ());
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if (regno < I386_NUM_GREGS || regno == -1)
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{
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thread_state_t state;
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thread_state_data_t old_state;
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int was_aborted = thread->aborted;
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int was_valid = thread->state_valid;
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int trace;
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if (!was_aborted && was_valid)
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memcpy (&old_state, &thread->state, sizeof (old_state));
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state = proc_get_state (thread, 1);
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if (!state)
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{
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warning (_("Couldn't store registers into %s"),
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proc_string (thread));
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return;
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}
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/* Save the T bit. We might try to restore the %eflags register
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below, but changing the T bit would seriously confuse GDB. */
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trace = ((struct i386_thread_state *)state)->efl & 0x100;
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if (!was_aborted && was_valid)
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/* See which registers have changed after aborting the thread. */
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{
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int check_regno;
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for (check_regno = 0; check_regno < I386_NUM_GREGS; check_regno++)
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if ((thread->fetched_regs & (1 << check_regno))
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&& memcpy (REG_ADDR (&old_state, check_regno),
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REG_ADDR (state, check_regno),
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register_size (gdbarch, check_regno)))
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/* Register CHECK_REGNO has changed! Ack! */
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{
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warning (_("Register %s changed after the thread was aborted"),
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gdbarch_register_name (gdbarch, check_regno));
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if (regno >= 0 && regno != check_regno)
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/* Update GDB's copy of the register. */
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regcache->raw_supply (check_regno,
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REG_ADDR (state, check_regno));
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else
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warning (_("... also writing this register! "
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"Suspicious..."));
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}
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}
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if (regno == -1)
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{
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int i;
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proc_debug (thread, "storing all registers");
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for (i = 0; i < I386_NUM_GREGS; i++)
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if (REG_VALID == regcache->get_register_status (i))
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regcache->raw_collect (i, REG_ADDR (state, i));
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}
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else
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{
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proc_debug (thread, "storing register %s",
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gdbarch_register_name (gdbarch, regno));
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gdb_assert (REG_VALID == regcache->get_register_status (regno));
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regcache->raw_collect (regno, REG_ADDR (state, regno));
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}
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/* Restore the T bit. */
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((struct i386_thread_state *)state)->efl &= ~0x100;
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((struct i386_thread_state *)state)->efl |= trace;
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}
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if (regno >= I386_NUM_GREGS || regno == -1)
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{
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proc_debug (thread, "storing floating-point registers");
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store_fpregs (regcache, thread, regno);
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}
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}
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/* Support for debug registers. */
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#ifdef i386_DEBUG_STATE
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/* Get debug registers for thread THREAD. */
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static void
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i386_gnu_dr_get (struct i386_debug_state *regs, struct proc *thread)
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{
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mach_msg_type_number_t count = i386_DEBUG_STATE_COUNT;
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kern_return_t err;
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err = thread_get_state (thread->port, i386_DEBUG_STATE,
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(thread_state_t) regs, &count);
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if (err != 0 || count != i386_DEBUG_STATE_COUNT)
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warning (_("Couldn't fetch debug state from %s"),
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proc_string (thread));
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}
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/* Set debug registers for thread THREAD. */
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static void
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i386_gnu_dr_set (const struct i386_debug_state *regs, struct proc *thread)
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{
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kern_return_t err;
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err = thread_set_state (thread->port, i386_DEBUG_STATE,
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(thread_state_t) regs, i386_DEBUG_STATE_COUNT);
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if (err != 0)
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warning (_("Couldn't store debug state into %s"),
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proc_string (thread));
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}
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/* Set DR_CONTROL in THREAD. */
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static void
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i386_gnu_dr_set_control_one (struct proc *thread, void *arg)
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{
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unsigned long *control = (unsigned long *) arg;
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struct i386_debug_state regs;
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i386_gnu_dr_get (®s, thread);
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regs.dr[DR_CONTROL] = *control;
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i386_gnu_dr_set (®s, thread);
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}
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/* Set DR_CONTROL to CONTROL in all threads. */
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static void
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i386_gnu_dr_set_control (unsigned long control)
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{
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inf_update_procs (gnu_current_inf);
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inf_threads (gnu_current_inf, i386_gnu_dr_set_control_one, &control);
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}
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/* Parameters to set a debugging address. */
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struct reg_addr
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{
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int regnum; /* Register number (zero based). */
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CORE_ADDR addr; /* Address. */
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};
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/* Set address REGNUM (zero based) to ADDR in THREAD. */
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static void
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i386_gnu_dr_set_addr_one (struct proc *thread, void *arg)
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{
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struct reg_addr *reg_addr = (struct reg_addr *) arg;
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struct i386_debug_state regs;
|
||
|
||
i386_gnu_dr_get (®s, thread);
|
||
regs.dr[reg_addr->regnum] = reg_addr->addr;
|
||
i386_gnu_dr_set (®s, thread);
|
||
}
|
||
|
||
/* Set address REGNUM (zero based) to ADDR in all threads. */
|
||
|
||
static void
|
||
i386_gnu_dr_set_addr (int regnum, CORE_ADDR addr)
|
||
{
|
||
struct reg_addr reg_addr;
|
||
|
||
gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
|
||
|
||
reg_addr.regnum = regnum;
|
||
reg_addr.addr = addr;
|
||
|
||
inf_update_procs (gnu_current_inf);
|
||
inf_threads (gnu_current_inf, i386_gnu_dr_set_addr_one, ®_addr);
|
||
}
|
||
|
||
/* Get debug register REGNUM value from only the one LWP of PTID. */
|
||
|
||
static unsigned long
|
||
i386_gnu_dr_get_reg (ptid_t ptid, int regnum)
|
||
{
|
||
struct i386_debug_state regs;
|
||
struct proc *thread;
|
||
|
||
/* Make sure we know about new threads. */
|
||
inf_update_procs (gnu_current_inf);
|
||
|
||
thread = inf_tid_to_thread (gnu_current_inf, ptid.lwp ());
|
||
i386_gnu_dr_get (®s, thread);
|
||
|
||
return regs.dr[regnum];
|
||
}
|
||
|
||
/* Return the inferior's debug register REGNUM. */
|
||
|
||
static CORE_ADDR
|
||
i386_gnu_dr_get_addr (int regnum)
|
||
{
|
||
gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR);
|
||
|
||
return i386_gnu_dr_get_reg (inferior_ptid, regnum);
|
||
}
|
||
|
||
/* Get DR_STATUS from only the one thread of INFERIOR_PTID. */
|
||
|
||
static unsigned long
|
||
i386_gnu_dr_get_status (void)
|
||
{
|
||
return i386_gnu_dr_get_reg (inferior_ptid, DR_STATUS);
|
||
}
|
||
|
||
/* Return the inferior's DR7 debug control register. */
|
||
|
||
static unsigned long
|
||
i386_gnu_dr_get_control (void)
|
||
{
|
||
return i386_gnu_dr_get_reg (inferior_ptid, DR_CONTROL);
|
||
}
|
||
#endif /* i386_DEBUG_STATE */
|
||
|
||
void
|
||
_initialize_i386gnu_nat (void)
|
||
{
|
||
#ifdef i386_DEBUG_STATE
|
||
x86_dr_low.set_control = i386_gnu_dr_set_control;
|
||
gdb_assert (DR_FIRSTADDR == 0 && DR_LASTADDR < i386_DEBUG_STATE_COUNT);
|
||
x86_dr_low.set_addr = i386_gnu_dr_set_addr;
|
||
x86_dr_low.get_addr = i386_gnu_dr_get_addr;
|
||
x86_dr_low.get_status = i386_gnu_dr_get_status;
|
||
x86_dr_low.get_control = i386_gnu_dr_get_control;
|
||
x86_set_debug_register_length (4);
|
||
#endif /* i386_DEBUG_STATE */
|
||
|
||
/* Register the target. */
|
||
add_inf_child_target (&the_i386_gnu_nat_target);
|
||
}
|