--- /dev/null
+/* Record and reverse target for GDB, the GNU debugger.
+
+ Copyright (C) 2008 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 2 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 <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "target.h"
+#include "gdbcmd.h"
+#include "regcache.h"
+#include "inferior.h"
+#include "gdbthread.h"
+#include "record.h"
+
+#include <signal.h>
+
+#define DEFAULT_RECORD_INSN_MAX_NUM 200000
+
+int record_debug = 0;
+
+record_t record_first;
+record_t *record_list = &record_first;
+record_t *record_arch_list_head = NULL;
+record_t *record_arch_list_tail = NULL;
+struct regcache *record_regcache = NULL;
+
+/* 0 ask user. 1 auto delete the last record_t. */
+static int record_insn_max_mode = 0;
+static int record_insn_max_num = DEFAULT_RECORD_INSN_MAX_NUM;
+static int record_insn_num = 0;
+
+struct target_ops record_ops;
+int record_resume_step = 0;
+enum exec_direction_kind record_execdir = EXEC_FORWARD;
+int record_linux_async_permitted = 0;
+static int record_get_sig = 0;
+static sigset_t record_maskall;
+static int record_not_record = 0;
+int record_regcache_raw_write_regnum = 0;
+int record_will_store_registers = 0;
+
+extern struct bp_location *bp_location_chain;
+
+/* The real beneath function pointers. */
+void (*record_beneath_to_resume) (ptid_t, int, enum target_signal);
+ptid_t (*record_beneath_to_wait) (ptid_t, struct target_waitstatus *);
+void (*record_beneath_to_prepare_to_store) (struct regcache *);
+LONGEST (*record_beneath_to_xfer_partial) (struct target_ops * ops,
+ enum target_object object,
+ const char *annex,
+ gdb_byte * readbuf,
+ const gdb_byte * writebuf,
+ ULONGEST offset, LONGEST len);
+int (*record_beneath_to_insert_breakpoint) (struct bp_target_info *);
+int (*record_beneath_to_remove_breakpoint) (struct bp_target_info *);
+
+static void
+record_list_release (record_t * rec)
+{
+ record_t *tmp;
+
+ if (!rec)
+ return;
+
+ while (rec->next)
+ {
+ rec = rec->next;
+ }
+
+ while (rec->prev)
+ {
+ tmp = rec;
+ rec = rec->prev;
+ if (tmp->type == record_reg)
+ {
+ xfree (tmp->u.reg.val);
+ }
+ else if (tmp->type == record_mem)
+ {
+ xfree (tmp->u.mem.val);
+ }
+ xfree (tmp);
+ }
+
+ if (rec != &record_first)
+ {
+ xfree (rec);
+ }
+}
+
+static void
+record_list_release_next (void)
+{
+ record_t *rec = record_list;
+ record_t *tmp = rec->next;
+ rec->next = NULL;
+ while (tmp)
+ {
+ rec = tmp->next;
+ if (tmp->type == record_reg)
+ {
+ record_insn_num--;
+ }
+ else if (tmp->type == record_reg)
+ {
+ xfree (tmp->u.reg.val);
+ }
+ else if (tmp->type == record_mem)
+ {
+ xfree (tmp->u.mem.val);
+ }
+ xfree (tmp);
+ tmp = rec;
+ }
+}
+
+static void
+record_list_release_first (void)
+{
+ record_t *tmp = NULL;
+ enum record_type type;
+
+ if (!record_first.next)
+ {
+ return;
+ }
+
+ while (1)
+ {
+ type = record_first.next->type;
+
+ if (type == record_reg)
+ {
+ xfree (record_first.next->u.reg.val);
+ }
+ else if (type == record_mem)
+ {
+ xfree (record_first.next->u.mem.val);
+ }
+ tmp = record_first.next;
+ record_first.next = tmp->next;
+ xfree (tmp);
+
+ if (!record_first.next)
+ {
+ gdb_assert (record_insn_num == 1);
+ break;
+ }
+
+ record_first.next->prev = &record_first;
+
+ if (type == record_end)
+ {
+ break;
+ }
+ }
+
+ record_insn_num--;
+}
+
+/* Add a record_t to record_arch_list. */
+static void
+record_arch_list_add (record_t * rec)
+{
+ if (record_arch_list_tail)
+ {
+ record_arch_list_tail->next = rec;
+ rec->prev = record_arch_list_tail;
+ record_arch_list_tail = rec;
+ }
+ else
+ {
+ record_arch_list_head = rec;
+ record_arch_list_tail = rec;
+ }
+}
+
+/* Record the value of a register ("num") to record_arch_list. */
+int
+record_arch_list_add_reg (int num)
+{
+ record_t *rec;
+
+ if (record_debug > 1)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: add register num = %d to record list.\n",
+ num);
+ }
+
+ rec = (record_t *) xmalloc (sizeof (record_t));
+ rec->u.reg.val = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE);
+ rec->prev = NULL;
+ rec->next = NULL;
+ rec->type = record_reg;
+ rec->u.reg.num = num;
+
+ regcache_raw_read (record_regcache, num, rec->u.reg.val);
+
+ record_arch_list_add (rec);
+
+ return (0);
+}
+
+/* Record the value of a region of memory whose address is "addr" and
+ length is "len" to record_arch_list. */
+
+int
+record_arch_list_add_mem (CORE_ADDR addr, int len)
+{
+ record_t *rec;
+
+ if (record_debug > 1)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: add mem addr = 0x%s len = %d to record list.\n",
+ paddr_nz (addr), len);
+ }
+
+ if (!addr)
+ {
+ return (0);
+ }
+
+ rec = (record_t *) xmalloc (sizeof (record_t));
+ rec->u.mem.val = (gdb_byte *) xmalloc (len);
+ rec->prev = NULL;
+ rec->next = NULL;
+ rec->type = record_mem;
+ rec->u.mem.addr = addr;
+ rec->u.mem.len = len;
+
+ if (target_read_memory (addr, rec->u.mem.val, len))
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: read memory addr = 0x%s len = %d error.\n",
+ paddr_nz (addr), len);
+ xfree (rec->u.mem.val);
+ xfree (rec);
+ return (-1);
+ }
+
+ record_arch_list_add (rec);
+
+ return (0);
+}
+
+/* Add a record_end type record_t to record_arch_list. */
+int
+record_arch_list_add_end (int need_dasm)
+{
+ record_t *rec;
+
+ if (record_debug > 1)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: add end need_dasm = %d to arch list.\n",
+ need_dasm);
+ }
+
+ rec = (record_t *) xmalloc (sizeof (record_t));
+ rec->prev = NULL;
+ rec->next = NULL;
+ rec->type = record_end;
+
+ rec->u.need_dasm = need_dasm;
+
+ record_arch_list_add (rec);
+
+ return (0);
+}
+
+static void
+record_check_insn_num (int set_terminal)
+{
+ if (record_insn_max_num)
+ {
+ gdb_assert (record_insn_num <= record_insn_max_num);
+ if (record_insn_num == record_insn_max_num)
+ {
+ /* Ask user how to do */
+ if (!record_insn_max_mode)
+ {
+ int q;
+ if (set_terminal)
+ target_terminal_ours ();
+ q = yquery (_("The record instruction number (record-insn-number) is equal to record-insn-number-max. Do you want to open auto delete first record_t function (record-auto-delete)?"));
+ if (set_terminal)
+ target_terminal_inferior ();
+ if (q)
+ {
+ record_insn_max_mode = 1;
+ }
+ else
+ {
+ error (_("Record: record stop the program."));
+ }
+ }
+ }
+ }
+}
+
+/* Before inferior step (when GDB record the running message, inferior
+ only can step), GDB will call this function to record the values to
+ record_list. This function will call gdbarch_process_record to
+ record the running message of inferior and set them to
+ record_arch_list, and add it to record_list. */
+
+static void
+record_message_cleanups (void *ignore)
+{
+ record_list_release (record_arch_list_tail);
+ set_executing (inferior_ptid, 0);
+ normal_stop ();
+}
+
+void
+record_message (struct gdbarch *gdbarch)
+{
+ int ret;
+ struct cleanup *old_cleanups = make_cleanup (record_message_cleanups, 0);
+
+ /* Check record_insn_num. */
+ record_check_insn_num (1);
+
+ record_arch_list_head = NULL;
+ record_arch_list_tail = NULL;
+ record_regcache = get_current_regcache ();
+
+ ret = gdbarch_process_record (gdbarch,
+ regcache_read_pc (record_regcache));
+ if (ret > 0)
+ error (_("Record: record pause the program."));
+ if (ret < 0)
+ error (_("Record: record message error."));
+
+ discard_cleanups (old_cleanups);
+
+ record_list->next = record_arch_list_head;
+ record_arch_list_head->prev = record_list;
+ record_list = record_arch_list_tail;
+
+ if (record_insn_num == record_insn_max_num && record_insn_max_num)
+ {
+ record_list_release_first ();
+ }
+ else
+ {
+ record_insn_num++;
+ }
+}
+
+/* Things to clean up if we QUIT out of function that set
+ record_not_record. */
+static void
+record_not_record_cleanups (void *ignore)
+{
+ record_not_record = 0;
+}
+
+void
+record_not_record_set (void)
+{
+ struct cleanup *old_cleanups = make_cleanup (record_not_record_cleanups, 0);
+ record_not_record = 1;
+}
+
+static void
+record_open (char *name, int from_tty)
+{
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Record: record_open\n");
+ }
+
+ /* check exec */
+ if (!target_has_execution)
+ {
+ error (_("Record: the program is not being run."));
+ }
+ if (non_stop)
+ {
+ error (_("Record: record target can't debug inferior in non-stop mode (non-stop)."));
+ }
+ if (record_linux_async_permitted)
+ {
+ error (_("Record: record target can't debug the GNU/Linux inferior in asynchronous mode (linux-async)."));
+ }
+
+ if (!gdbarch_process_record_p (current_gdbarch))
+ {
+ error (_("Record: the current architecture doesn't support record function."));
+ }
+
+ /* Check if record target is already running */
+ if (RECORD_IS_USED)
+ {
+ if (!nquery
+ (_("Record target already running, do you want delete the old record log?")))
+ {
+ return;
+ }
+ }
+
+ /* Reset */
+ record_insn_num = 0;
+ record_execdir = EXEC_FORWARD;
+ record_list = &record_first;
+ record_list->next = NULL;
+
+ push_target (&record_ops);
+}
+
+static void
+record_close (int quitting)
+{
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Record: record_close\n");
+ }
+ record_list_release (record_list);
+}
+
+static void
+record_resume (ptid_t ptid, int step, enum target_signal siggnal)
+{
+ record_resume_step = step;
+
+ if (!RECORD_IS_REPLAY)
+ {
+ record_message (current_gdbarch);
+ record_beneath_to_resume (ptid, 1, siggnal);
+ }
+}
+
+static void
+record_sig_handler (int signo)
+{
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Record: get a signal\n");
+ }
+ record_resume_step = 1;
+ record_get_sig = 1;
+}
+
+static void
+record_wait_cleanups (void *ignore)
+{
+ if (record_execdir == EXEC_REVERSE)
+ {
+ if (record_list->next)
+ {
+ record_list = record_list->next;
+ }
+ }
+ else
+ {
+ record_list = record_list->prev;
+ }
+ set_executing (inferior_ptid, 0);
+ normal_stop ();
+}
+
+/* record_wait
+ In replay mode, this function examines the recorded log and
+ determines where to stop. */
+
+static ptid_t
+record_wait (ptid_t ptid, struct target_waitstatus *status)
+{
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: record_wait record_resume_step = %d\n",
+ record_resume_step);
+ }
+
+ if (!RECORD_IS_REPLAY)
+ {
+ return record_beneath_to_wait (ptid, status);
+ }
+ else
+ {
+ struct sigaction act, old_act;
+ int need_dasm = 0;
+ struct regcache *regcache = get_current_regcache ();
+ int continue_flag = 1;
+ int first_record_end = 1;
+ struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0);
+
+ record_get_sig = 0;
+ act.sa_handler = record_sig_handler;
+ act.sa_mask = record_maskall;
+ act.sa_flags = SA_RESTART;
+ if (sigaction (SIGINT, &act, &old_act))
+ {
+ perror_with_name (_("Record: sigaction"));
+ }
+ /* If GDB is in terminal_inferior, it will not get the signal.
+ And in GDB replay mode, GDB don't need to in terminal_inferior
+ because inferior will not executed.
+ Then set it to terminal_ours to make GDB get the signal. */
+ target_terminal_ours ();
+
+ /* In EXEC_FORWARD mode, record_list point to the tail of prev
+ instruction. */
+ if (record_execdir == EXEC_FORWARD && record_list->next)
+ {
+ record_list = record_list->next;
+ }
+
+ /* Loop over the record_list, looking for the next place to
+ stop. */
+ status->kind = TARGET_WAITKIND_STOPPED;
+ do
+ {
+ /* Check for beginning and end of log. */
+ if (record_execdir == EXEC_REVERSE
+ && record_list == &record_first)
+ {
+ /* Hit beginning of record log in reverse. */
+ status->kind = TARGET_WAITKIND_NO_HISTORY;
+ break;
+ }
+ if (record_execdir != EXEC_REVERSE && !record_list->next)
+ {
+ /* Hit end of record log going forward. */
+ status->kind = TARGET_WAITKIND_NO_HISTORY;
+ break;
+ }
+
+ /* set ptid, register and memory according to record_list */
+ if (record_list->type == record_reg)
+ {
+ /* reg */
+ gdb_byte reg[MAX_REGISTER_SIZE];
+ if (record_debug > 1)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: record_reg 0x%s to inferior num = %d.\n",
+ paddr_nz ((CORE_ADDR)record_list),
+ record_list->u.reg.num);
+ }
+ regcache_cooked_read (regcache, record_list->u.reg.num, reg);
+ regcache_cooked_write (regcache, record_list->u.reg.num,
+ record_list->u.reg.val);
+ memcpy (record_list->u.reg.val, reg, MAX_REGISTER_SIZE);
+ }
+ else if (record_list->type == record_mem)
+ {
+ /* mem */
+ gdb_byte *mem = alloca (record_list->u.mem.len);
+ if (record_debug > 1)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: record_mem 0x%s to inferior addr = 0x%s len = %d.\n",
+ paddr_nz ((CORE_ADDR)record_list),
+ paddr_nz (record_list->u.mem.addr),
+ record_list->u.mem.len);
+ }
+ if (target_read_memory
+ (record_list->u.mem.addr, mem, record_list->u.mem.len))
+ {
+ error (_("Record: read memory addr = 0x%s len = %d error."),
+ paddr_nz (record_list->u.mem.addr),
+ record_list->u.mem.len);
+ }
+ if (target_write_memory
+ (record_list->u.mem.addr, record_list->u.mem.val,
+ record_list->u.mem.len))
+ {
+ error (_
+ ("Record: write memory addr = 0x%s len = %d error."),
+ paddr_nz (record_list->u.mem.addr),
+ record_list->u.mem.len);
+ }
+ memcpy (record_list->u.mem.val, mem, record_list->u.mem.len);
+ }
+ else
+ {
+ CORE_ADDR tmp_pc;
+ struct bp_location *bl;
+ struct breakpoint *b;
+
+ if (record_debug > 1)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: record_end 0x%s to inferior need_dasm = %d.\n",
+ paddr_nz ((CORE_ADDR)record_list),
+ record_list->u.need_dasm);
+ }
+
+ if (record_execdir == EXEC_FORWARD)
+ {
+ need_dasm = record_list->u.need_dasm;
+ }
+ if (need_dasm)
+ {
+ gdbarch_process_record_dasm (current_gdbarch);
+ }
+
+ if (first_record_end && record_execdir == EXEC_REVERSE)
+ {
+ /* When reverse excute, the first record_end is the part of
+ current instruction. */
+ first_record_end = 0;
+ }
+ else
+ {
+ /* In EXEC_REVERSE mode, this is the record_end of prev
+ instruction.
+ In EXEC_FORWARD mode, this is the record_end of current
+ instruction. */
+ /* step */
+ if (record_resume_step)
+ {
+ if (record_debug > 1)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Record: step.\n");
+ }
+ continue_flag = 0;
+ }
+
+ /* check breakpoint */
+ tmp_pc = read_pc ();
+ for (bl = bp_location_chain; bl; bl = bl->global_next)
+ {
+ b = bl->owner;
+ gdb_assert (b);
+ if (b->enable_state != bp_enabled
+ && b->enable_state != bp_permanent)
+ continue;
+
+ if (b->type == bp_watchpoint || b->type == bp_catch_fork
+ || b->type == bp_catch_vfork
+ || b->type == bp_catch_exec
+ || b->type == bp_hardware_watchpoint
+ || b->type == bp_read_watchpoint
+ || b->type == bp_access_watchpoint)
+ {
+ continue;
+ }
+ if (bl->address == tmp_pc)
+ {
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Record: break at 0x%s.\n",
+ paddr_nz (tmp_pc));
+ }
+ continue_flag = 0;
+ break;
+ }
+ }
+ }
+ if (record_execdir == EXEC_REVERSE)
+ {
+ need_dasm = record_list->u.need_dasm;
+ }
+ }
+
+next:
+ if (continue_flag)
+ {
+ if (record_execdir == EXEC_REVERSE)
+ {
+ if (record_list->prev)
+ record_list = record_list->prev;
+ }
+ else
+ {
+ if (record_list->next)
+ record_list = record_list->next;
+ }
+ }
+ }
+ while (continue_flag);
+
+ if (sigaction (SIGALRM, &old_act, NULL))
+ {
+ perror_with_name (_("Record: sigaction"));
+ }
+
+ if (record_get_sig)
+ {
+ status->value.sig = TARGET_SIGNAL_INT;
+ }
+ else
+ {
+ status->value.sig = TARGET_SIGNAL_TRAP;
+ }
+
+ discard_cleanups (old_cleanups);
+ }
+
+ return inferior_ptid;
+}
+
+static void
+record_disconnect (struct target_ops *target, char *args, int from_tty)
+{
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Record: record_disconnect\n");
+ }
+ unpush_target (&record_ops);
+ target_disconnect (args, from_tty);
+}
+
+static void
+record_detach (char *args, int from_tty)
+{
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Record: record_detach\n");
+ }
+ unpush_target (&record_ops);
+ target_detach (args, from_tty);
+}
+
+static void
+record_mourn_inferior (void)
+{
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Record: record_mourn_inferior\n");
+ }
+ unpush_target (&record_ops);
+ target_mourn_inferior ();
+}
+
+/* Close record target before kill the inferior process. */
+static void
+record_kill (void)
+{
+ if (record_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Record: record_kill\n");
+ }
+ unpush_target (&record_ops);
+ target_kill ();
+}
+
+/* Record registers change (by user or by GDB) to list as an instruction. */
+static void
+record_registers_change (struct regcache *regcache, int regnum)
+{
+ /* Check record_insn_num. */
+ record_check_insn_num (0);
+
+ record_arch_list_head = NULL;
+ record_arch_list_tail = NULL;
+
+ record_regcache = get_current_regcache ();
+
+ if (regnum < 0)
+ {
+ int i;
+ for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
+ {
+ if (record_arch_list_add_reg (i))
+ {
+ record_list_release (record_arch_list_tail);
+ error (_("Record: record message error."));
+ }
+ }
+ }
+ else
+ {
+ if (record_arch_list_add_reg (regnum))
+ {
+ record_list_release (record_arch_list_tail);
+ error (_("Record: record message error."));
+ }
+ }
+ if (record_arch_list_add_end (0))
+ {
+ record_list_release (record_arch_list_tail);
+ error (_("Record: record message error."));
+ }
+ record_list->next = record_arch_list_head;
+ record_arch_list_head->prev = record_list;
+ record_list = record_arch_list_tail;
+
+ if (record_insn_num == record_insn_max_num && record_insn_max_num)
+ {
+ record_list_release_first ();
+ }
+ else
+ {
+ record_insn_num++;
+ }
+}
+
+/* XXX: I don't know how to do if GDB call function target_store_registers
+ without call function target_prepare_to_store. */
+
+static void
+record_prepare_to_store (struct regcache *regcache)
+{
+ if (!record_not_record)
+ {
+ if (RECORD_IS_REPLAY)
+ {
+ struct cleanup *old_cleanups;
+ /* Let user choice if he want to write register or not. */
+ if (!nquery (_("Becuse GDB is in replay mode, changing the value of a register will destroy the record from this point forward. Change register %s?"),
+ gdbarch_register_name (get_regcache_arch
+ (regcache),
+ record_regcache_raw_write_regnum)))
+ {
+ error (_("Record: record cancel the operation."));
+ }
+
+ /* Destroy the record from here forward. */
+ record_list_release_next ();
+ }
+
+ record_registers_change (regcache, record_regcache_raw_write_regnum);
+ }
+ record_beneath_to_prepare_to_store (regcache);
+}
+
+/* record_xfer_partial -- behavior is conditional on RECORD_IS_REPLAY.
+ In replay mode, we cannot write memory unles we are willing to
+ invalidate the record/replay log from this point forward. */
+
+static LONGEST
+record_xfer_partial (struct target_ops *ops, enum target_object object,
+ const char *annex, gdb_byte * readbuf,
+ const gdb_byte * writebuf, ULONGEST offset, LONGEST len)
+{
+ if (!record_not_record
+ && (object == TARGET_OBJECT_MEMORY
+ || object == TARGET_OBJECT_RAW_MEMORY) && writebuf)
+ {
+ if (RECORD_IS_REPLAY)
+ {
+ /* Let user choice if he want to write memory or not. */
+ if (!nquery (_("Because GDB is in replay mode, writing to memory will destroy the record from this point forward. Write memory at address 0x%s?"),
+ paddr_nz (offset)))
+ {
+ return -1;
+ }
+
+ /* Destroy the record from here forward. */
+ record_list_release_next ();
+ }
+
+ /* Check record_insn_num */
+ record_check_insn_num (0);
+
+ /* Record registers change to list as an instruction. */
+ record_arch_list_head = NULL;
+ record_arch_list_tail = NULL;
+ if (record_arch_list_add_mem (offset, len))
+ {
+ record_list_release (record_arch_list_tail);
+ fprintf_unfiltered (gdb_stdlog, _("Record: record message error."));
+ return -1;
+ }
+ if (record_arch_list_add_end (0))
+ {
+ record_list_release (record_arch_list_tail);
+ fprintf_unfiltered (gdb_stdlog, _("Record: record message error."));
+ return -1;
+ }
+ record_list->next = record_arch_list_head;
+ record_arch_list_head->prev = record_list;
+ record_list = record_arch_list_tail;
+
+ if (record_insn_num == record_insn_max_num && record_insn_max_num)
+ {
+ record_list_release_first ();
+ }
+ else
+ {
+ record_insn_num++;
+ }
+ }
+
+ return record_beneath_to_xfer_partial (ops, object, annex, readbuf,
+ writebuf, offset, len);
+}
+
+/* record_insert_breakpoint
+ record_remove_breakpoint
+ Behavior is conditional on RECORD_IS_REPLAY.
+ We will not actually insert or remove breakpoints when replaying. */
+
+static int
+record_insert_breakpoint (struct bp_target_info *bp_tgt)
+{
+ if (!RECORD_IS_REPLAY)
+ {
+ return record_beneath_to_insert_breakpoint (bp_tgt);
+ }
+
+ return 0;
+}
+
+static int
+record_remove_breakpoint (struct bp_target_info *bp_tgt)
+{
+ if (!RECORD_IS_REPLAY)
+ {
+ return record_beneath_to_remove_breakpoint (bp_tgt);
+ }
+
+ return 0;
+}
+
+static enum exec_direction_kind
+record_get_execdir (void)
+{
+ if (record_debug > 1)
+ printf_filtered ("Record: execdir is %s\n",
+ record_execdir == EXEC_FORWARD ? "forward" :
+ record_execdir == EXEC_REVERSE ? "reverse" : "unknown");
+ return record_execdir;
+}
+
+static int
+record_set_execdir (enum exec_direction_kind dir)
+{
+ if (record_debug)
+ printf_filtered ("Record: set execdir: %s\n",
+ dir == EXEC_FORWARD ? "forward" :
+ dir == EXEC_REVERSE ? "reverse" : "bad direction");
+
+ /* FIXME: check target for capability. */
+ if (dir == EXEC_FORWARD || dir == EXEC_REVERSE)
+ return (record_execdir = dir);
+ else
+ return EXEC_ERROR;
+}
+
+static void
+init_record_ops (void)
+{
+ record_ops.to_shortname = "record";
+ record_ops.to_longname = "Record and reverse target";
+ record_ops.to_doc =
+ "Log program while executing and replay execution from log.";
+ record_ops.to_open = record_open;
+ record_ops.to_close = record_close;
+ record_ops.to_resume = record_resume;
+ record_ops.to_wait = record_wait;
+ record_ops.to_disconnect = record_disconnect;
+ record_ops.to_detach = record_detach;
+ record_ops.to_mourn_inferior = record_mourn_inferior;
+ record_ops.to_kill = record_kill;
+ record_ops.to_create_inferior = find_default_create_inferior; /* Make record suppport command "run". */
+ record_ops.to_prepare_to_store = record_prepare_to_store;
+ record_ops.to_xfer_partial = record_xfer_partial;
+ record_ops.to_insert_breakpoint = record_insert_breakpoint;
+ record_ops.to_remove_breakpoint = record_remove_breakpoint;
+ record_ops.to_get_execdir = record_get_execdir;
+ record_ops.to_set_execdir = record_set_execdir;
+ record_ops.to_stratum = record_stratum;
+ record_ops.to_magic = OPS_MAGIC;
+}
+
+static void
+show_record_debug (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Debugging of record target is %s.\n"), value);
+}
+
+/* cmd_record_start -- alias for "target record". */
+
+static void
+cmd_record_start (char *args, int from_tty)
+{
+ execute_command ("target record", from_tty);
+}
+
+/* cmd_record_delete -- truncate the record log from the present point
+ of replay until the end. */
+
+static void
+cmd_record_delete (char *args, int from_tty)
+{
+ if (RECORD_IS_USED)
+ {
+ if (RECORD_IS_REPLAY)
+ {
+ if (!from_tty || query (_("Record: delete the log from this point forward and begin to record the running message at current PC?")))
+ {
+ record_list_release_next ();
+ }
+ }
+ else
+ {
+ printf_unfiltered (_("Record: already at end of record list.\n"));
+ }
+
+ }
+ else
+ {
+ printf_unfiltered (_("Record: record target is not started.\n"));
+ }
+}
+
+/* cmd_record_stop -- implement the "stoprecord" command. */
+
+static void
+cmd_record_stop (char *args, int from_tty)
+{
+ if (RECORD_IS_USED)
+ {
+ if (!record_list || !from_tty || query (_("Record: delete recorded log and stop recording?")))
+ {
+ unpush_target (&record_ops);
+ }
+ }
+ else
+ {
+ printf_unfiltered (_("Record: record target is not started.\n"));
+ }
+}
+
+/* set_record_insn_max_num -- set upper limit of record log size. */
+
+static void
+set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c)
+{
+ if (record_insn_num > record_insn_max_num && record_insn_max_num)
+ {
+ printf_unfiltered (_("Record: record instructions number is bigger than record instructions max number. Auto delete the first ones.\n"));
+
+ while (record_insn_num > record_insn_max_num)
+ {
+ record_list_release_first ();
+ }
+ }
+}
+
+/* show_record_insn_number -- print the current index
+ into the record log (number of insns recorded so far). */
+
+static void
+show_record_insn_number (char *ignore, int from_tty)
+{
+ printf_unfiltered (_("Record instruction number is %d.\n"),
+ record_insn_num);
+}
+
+void
+_initialize_record (void)
+{
+ /* Init record_maskall. */
+ if (sigfillset (&record_maskall) == -1)
+ {
+ perror_with_name (_("Record: sigfillset"));
+ }
+
+ /* Init record_first. */
+ record_first.prev = NULL;
+ record_first.next = NULL;
+ record_first.type = record_end;
+ record_first.u.need_dasm = 0;
+
+ init_record_ops ();
+ add_target (&record_ops);
+
+ add_setshow_zinteger_cmd ("record", no_class, &record_debug,
+ _("Set debugging of record/replay feature."),
+ _("Show debugging of record/replay feature."),
+ _
+ ("When enabled, debugging output for record/replay feature is displayed."),
+ NULL, show_record_debug, &setdebuglist,
+ &showdebuglist);
+
+ add_com ("record", class_obscure, cmd_record_start,
+ _("Abbreviated form of \"target record\" command."));
+
+ add_com_alias ("rec", "record", class_obscure, 1);
+
+ /* XXX: I try to use some simple commands such as "disconnect" and
+ "detach" to support this functions. But these commands all have
+ other affect to GDB such as call function "no_shared_libraries".
+ So I add special commands to GDB. */
+ add_com ("delrecord", class_obscure, cmd_record_delete,
+ _("When record target running in replay mode, delete the next running messages and begin to record the running message at current address."));
+ add_com_alias ("dr", "delrecord", class_obscure, 1);
+ add_com ("stoprecord", class_obscure, cmd_record_stop,
+ _("Stop the record/replay target."));
+ add_com_alias ("sr", "stoprecord", class_obscure, 1);
+
+ /* Record instructions number limit command. */
+ add_setshow_zinteger_cmd ("record-auto-delete", no_class,
+ &record_insn_max_mode,
+ _("Set record/replay auto delete mode."),
+ _("Show record/replay auto delete mode."), _("\
+When enabled, if the record/replay buffer becomes full,\n\
+delete it and start new recording."), NULL, NULL, &setlist, &showlist);
+ add_setshow_zinteger_cmd ("record-insn-number-max", no_class,
+ &record_insn_max_num,
+ _("Set record/replay buffer limit."),
+ _("Show record/replay buffer limit."), _("\
+Set the maximum number of instructions to be stored in the\n\
+record/replay buffer. Zero means unlimited (default 200000)."),
+ set_record_insn_max_num,
+ NULL, &setlist, &showlist);
+ add_info ("record-insn-number", show_record_insn_number, _("\
+Show the current number of instructions in the record/replay buffer."));
+}
projects / thirdparty / binutils-gdb.git / commitdiff
