999dd04b89
bp_watchpoint_scope breakpoints.
(struct breakpoint): Add val_chain and related_breakpoint fields
for use by watchpoints.
* breakpoint.c (within_scope): Delete. No longer used.
(TARGET_CAN_USE_HARDWARE_WATCHPOINT): Provide default definition.
(target_{remove,insert}_watchpoint): Likewise.
(can_use_hardware_watchpoint): New function.
(remove_breakpoint): New function to remove a single breakpoint
or hardware watchpoint.
(insert_breakpoints): Handle insertion of hardware watchpoints.
Store a copy of the value chain derived from the watchpoint
expression.
(remove_breakpoints): Simplify by using remove_breakpoint.
(delete_breakpoint): Likewise.
(watchpoint_check): Delete the watchpoint and watchpoint scope
breakpoints when the watchpoint goes out of scope. Save & restore
the current frame after checking watchpoints.
(breakpoint_init_inferior): Likewise (restarting the program
makes all local watchpoints go out of scope).
(bpstat_stop_status): Handle hardware watchpoints much like normal
watchpoints. Delete the watchpoint and watchpoint scope breakpoint
when the watchpoint goes out of scope. Remove and reinsert all
breakpoints before returning if we stopped when a hardware watchpoint
fired.
(watch_command): Use a hardware watchpoint when possible. If
watching a local expression, build a scope breakpoint too.
(map_breakpoint_numbers): Also call given function for any
related breakpoints.
(disable_breakpoint): Never disable a scope breakpoint.
(enable_breakpoint): Handle hardware breakpoints much like normal
breakpoints, but recompute the watchpoint_scope breakpoint's
frame and address (if we have an associated scope breakpoint).
(read_memory_nobpt): Handle hardware watchpoints like normal
watchpoints. When necessary handle watchpoint_scope breakpoints.
(print_it_normal, bpstat_what, breakpoint_1, mention): Likewise.
(clear_command, breakpoint_re_set_one, enable_command): Likewise.
(disable_command): Likewise.
* blockframe.c (find_frame_addr_in_frame_chain): New function.
Extern prototype added to frame.h
* infrun.c (wait_for_inferior): Set current_frame and select
a frame before checking if we stopped due to a hardare watchpoint
firing. Handle stepping over hardware watchpoints.
(normal_stop): Remove unnecessary call to select_frame.
* value.h (value_release_to_mark): Declare.
* values.c (value_release_to_mark): New function.
* procfs.c (procfs_wait): Add cases for hardware watchpoints.
(procfs_set_watchpoint, procfs_stopped_by_watchpoint): New functions.
* hppab-nat.c (hppa_set_watchpoint): New function.
* config/pa/nm-hppab.h (STOPPED_BY_WATCHPOINT): Define.
(HAVE_STEPPABLE_WATCHPOINT): Define.
(TARGET_CAN_USE_HARDWARE_WATCHPOINT): Define.
(target_{insert,delete}_watchpoint): Define.
1955 lines
58 KiB
C
1955 lines
58 KiB
C
/* Target-struct-independent code to start (run) and stop an inferior process.
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Copyright 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994
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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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include <string.h>
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#include <ctype.h>
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#include "symtab.h"
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#include "frame.h"
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#include "inferior.h"
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#include "breakpoint.h"
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#include "wait.h"
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#include "gdbcore.h"
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#include "gdbcmd.h"
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#include "target.h"
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#include "thread.h"
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#include <signal.h>
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/* unistd.h is needed to #define X_OK */
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#ifdef USG
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#include <unistd.h>
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#else
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#include <sys/file.h>
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#endif
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/* Prototypes for local functions */
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static void
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signals_info PARAMS ((char *, int));
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static void
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handle_command PARAMS ((char *, int));
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static void sig_print_info PARAMS ((enum target_signal));
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static void
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sig_print_header PARAMS ((void));
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static void
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resume_cleanups PARAMS ((int));
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static int
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hook_stop_stub PARAMS ((char *));
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/* GET_LONGJMP_TARGET returns the PC at which longjmp() will resume the
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program. It needs to examine the jmp_buf argument and extract the PC
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from it. The return value is non-zero on success, zero otherwise. */
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#ifndef GET_LONGJMP_TARGET
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#define GET_LONGJMP_TARGET(PC_ADDR) 0
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#endif
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/* Some machines have trampoline code that sits between function callers
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and the actual functions themselves. If this machine doesn't have
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such things, disable their processing. */
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#ifndef SKIP_TRAMPOLINE_CODE
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#define SKIP_TRAMPOLINE_CODE(pc) 0
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#endif
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/* For SVR4 shared libraries, each call goes through a small piece of
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trampoline code in the ".plt" section. IN_SOLIB_TRAMPOLINE evaluates
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to nonzero if we are current stopped in one of these. */
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#ifndef IN_SOLIB_TRAMPOLINE
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#define IN_SOLIB_TRAMPOLINE(pc,name) 0
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#endif
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/* On some systems, the PC may be left pointing at an instruction that won't
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actually be executed. This is usually indicated by a bit in the PSW. If
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we find ourselves in such a state, then we step the target beyond the
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nullified instruction before returning control to the user so as to avoid
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confusion. */
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#ifndef INSTRUCTION_NULLIFIED
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#define INSTRUCTION_NULLIFIED 0
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#endif
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/* Tables of how to react to signals; the user sets them. */
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static unsigned char *signal_stop;
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static unsigned char *signal_print;
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static unsigned char *signal_program;
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#define SET_SIGS(nsigs,sigs,flags) \
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do { \
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int signum = (nsigs); \
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while (signum-- > 0) \
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if ((sigs)[signum]) \
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(flags)[signum] = 1; \
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} while (0)
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#define UNSET_SIGS(nsigs,sigs,flags) \
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do { \
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int signum = (nsigs); \
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while (signum-- > 0) \
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if ((sigs)[signum]) \
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(flags)[signum] = 0; \
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} while (0)
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/* Command list pointer for the "stop" placeholder. */
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static struct cmd_list_element *stop_command;
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/* Nonzero if breakpoints are now inserted in the inferior. */
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static int breakpoints_inserted;
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/* Function inferior was in as of last step command. */
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static struct symbol *step_start_function;
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/* Nonzero if we are expecting a trace trap and should proceed from it. */
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static int trap_expected;
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/* Nonzero if the next time we try to continue the inferior, it will
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step one instruction and generate a spurious trace trap.
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This is used to compensate for a bug in HP-UX. */
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static int trap_expected_after_continue;
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/* Nonzero means expecting a trace trap
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and should stop the inferior and return silently when it happens. */
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int stop_after_trap;
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/* Nonzero means expecting a trap and caller will handle it themselves.
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It is used after attach, due to attaching to a process;
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when running in the shell before the child program has been exec'd;
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and when running some kinds of remote stuff (FIXME?). */
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int stop_soon_quietly;
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/* Nonzero if proceed is being used for a "finish" command or a similar
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situation when stop_registers should be saved. */
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int proceed_to_finish;
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/* Save register contents here when about to pop a stack dummy frame,
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if-and-only-if proceed_to_finish is set.
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Thus this contains the return value from the called function (assuming
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values are returned in a register). */
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char stop_registers[REGISTER_BYTES];
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/* Nonzero if program stopped due to error trying to insert breakpoints. */
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static int breakpoints_failed;
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/* Nonzero after stop if current stack frame should be printed. */
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static int stop_print_frame;
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#ifdef NO_SINGLE_STEP
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extern int one_stepped; /* From machine dependent code */
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extern void single_step (); /* Same. */
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#endif /* NO_SINGLE_STEP */
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/* Things to clean up if we QUIT out of resume (). */
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/* ARGSUSED */
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static void
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resume_cleanups (arg)
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int arg;
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{
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normal_stop ();
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}
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/* Resume the inferior, but allow a QUIT. This is useful if the user
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wants to interrupt some lengthy single-stepping operation
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(for child processes, the SIGINT goes to the inferior, and so
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we get a SIGINT random_signal, but for remote debugging and perhaps
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other targets, that's not true).
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STEP nonzero if we should step (zero to continue instead).
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SIG is the signal to give the inferior (zero for none). */
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void
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resume (step, sig)
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int step;
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enum target_signal sig;
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{
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struct cleanup *old_cleanups = make_cleanup (resume_cleanups, 0);
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QUIT;
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#ifdef CANNOT_STEP_BREAKPOINT
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/* Most targets can step a breakpoint instruction, thus executing it
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normally. But if this one cannot, just continue and we will hit
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it anyway. */
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if (step && breakpoints_inserted && breakpoint_here_p (read_pc ()))
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step = 0;
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#endif
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#ifdef NO_SINGLE_STEP
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if (step) {
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single_step(sig); /* Do it the hard way, w/temp breakpoints */
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step = 0; /* ...and don't ask hardware to do it. */
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}
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#endif
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/* Handle any optimized stores to the inferior NOW... */
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#ifdef DO_DEFERRED_STORES
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DO_DEFERRED_STORES;
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#endif
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/* Install inferior's terminal modes. */
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target_terminal_inferior ();
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target_resume (-1, step, sig);
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discard_cleanups (old_cleanups);
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}
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/* Clear out all variables saying what to do when inferior is continued.
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First do this, then set the ones you want, then call `proceed'. */
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void
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clear_proceed_status ()
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{
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trap_expected = 0;
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step_range_start = 0;
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step_range_end = 0;
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step_frame_address = 0;
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step_over_calls = -1;
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stop_after_trap = 0;
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stop_soon_quietly = 0;
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proceed_to_finish = 0;
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breakpoint_proceeded = 1; /* We're about to proceed... */
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/* Discard any remaining commands or status from previous stop. */
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bpstat_clear (&stop_bpstat);
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}
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/* Basic routine for continuing the program in various fashions.
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ADDR is the address to resume at, or -1 for resume where stopped.
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SIGGNAL is the signal to give it, or 0 for none,
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or -1 for act according to how it stopped.
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STEP is nonzero if should trap after one instruction.
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-1 means return after that and print nothing.
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You should probably set various step_... variables
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before calling here, if you are stepping.
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You should call clear_proceed_status before calling proceed. */
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void
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proceed (addr, siggnal, step)
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CORE_ADDR addr;
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enum target_signal siggnal;
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int step;
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{
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int oneproc = 0;
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if (step > 0)
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step_start_function = find_pc_function (read_pc ());
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if (step < 0)
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stop_after_trap = 1;
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if (addr == (CORE_ADDR)-1)
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{
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/* If there is a breakpoint at the address we will resume at,
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step one instruction before inserting breakpoints
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so that we do not stop right away. */
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if (breakpoint_here_p (read_pc ()))
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oneproc = 1;
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#ifdef STEP_SKIPS_DELAY
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/* Check breakpoint_here_p first, because breakpoint_here_p is fast
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(it just checks internal GDB data structures) and STEP_SKIPS_DELAY
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is slow (it needs to read memory from the target). */
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if (breakpoint_here_p (read_pc () + 4)
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&& STEP_SKIPS_DELAY (read_pc ()))
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oneproc = 1;
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#endif /* STEP_SKIPS_DELAY */
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}
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else
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write_pc (addr);
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if (trap_expected_after_continue)
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{
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/* If (step == 0), a trap will be automatically generated after
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the first instruction is executed. Force step one
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instruction to clear this condition. This should not occur
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if step is nonzero, but it is harmless in that case. */
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oneproc = 1;
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trap_expected_after_continue = 0;
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}
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if (oneproc)
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/* We will get a trace trap after one instruction.
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Continue it automatically and insert breakpoints then. */
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trap_expected = 1;
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else
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{
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int temp = insert_breakpoints ();
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if (temp)
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{
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print_sys_errmsg ("ptrace", temp);
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error ("Cannot insert breakpoints.\n\
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The same program may be running in another process.");
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}
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breakpoints_inserted = 1;
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}
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if (siggnal != TARGET_SIGNAL_DEFAULT)
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stop_signal = siggnal;
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/* If this signal should not be seen by program,
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give it zero. Used for debugging signals. */
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else if (!signal_program[stop_signal])
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stop_signal = TARGET_SIGNAL_0;
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/* Resume inferior. */
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resume (oneproc || step || bpstat_should_step (), stop_signal);
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/* Wait for it to stop (if not standalone)
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and in any case decode why it stopped, and act accordingly. */
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wait_for_inferior ();
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normal_stop ();
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}
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/* Record the pc and sp of the program the last time it stopped.
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These are just used internally by wait_for_inferior, but need
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to be preserved over calls to it and cleared when the inferior
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is started. */
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static CORE_ADDR prev_pc;
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static CORE_ADDR prev_sp;
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static CORE_ADDR prev_func_start;
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static char *prev_func_name;
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static CORE_ADDR prev_frame_address;
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/* Start remote-debugging of a machine over a serial link. */
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void
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start_remote ()
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{
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init_wait_for_inferior ();
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clear_proceed_status ();
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stop_soon_quietly = 1;
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trap_expected = 0;
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wait_for_inferior ();
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normal_stop ();
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}
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/* Initialize static vars when a new inferior begins. */
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void
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init_wait_for_inferior ()
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{
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/* These are meaningless until the first time through wait_for_inferior. */
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prev_pc = 0;
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prev_sp = 0;
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prev_func_start = 0;
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prev_func_name = NULL;
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prev_frame_address = 0;
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trap_expected_after_continue = 0;
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breakpoints_inserted = 0;
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breakpoint_init_inferior ();
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/* Don't confuse first call to proceed(). */
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stop_signal = TARGET_SIGNAL_0;
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}
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static void
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delete_breakpoint_current_contents (arg)
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PTR arg;
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{
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struct breakpoint **breakpointp = (struct breakpoint **)arg;
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if (*breakpointp != NULL)
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delete_breakpoint (*breakpointp);
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}
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/* Wait for control to return from inferior to debugger.
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If inferior gets a signal, we may decide to start it up again
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instead of returning. That is why there is a loop in this function.
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When this function actually returns it means the inferior
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should be left stopped and GDB should read more commands. */
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void
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wait_for_inferior ()
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{
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struct cleanup *old_cleanups;
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struct target_waitstatus w;
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int another_trap;
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int random_signal;
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CORE_ADDR stop_sp = 0;
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CORE_ADDR stop_func_start;
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CORE_ADDR stop_func_end;
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char *stop_func_name;
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CORE_ADDR prologue_pc = 0, tmp;
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struct symtab_and_line sal;
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int remove_breakpoints_on_following_step = 0;
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int current_line;
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struct symtab *current_symtab;
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int handling_longjmp = 0; /* FIXME */
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struct breakpoint *step_resume_breakpoint = NULL;
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struct breakpoint *through_sigtramp_breakpoint = NULL;
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int pid;
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old_cleanups = make_cleanup (delete_breakpoint_current_contents,
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&step_resume_breakpoint);
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make_cleanup (delete_breakpoint_current_contents,
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&through_sigtramp_breakpoint);
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sal = find_pc_line(prev_pc, 0);
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current_line = sal.line;
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current_symtab = sal.symtab;
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/* Are we stepping? */
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#define CURRENTLY_STEPPING() \
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((through_sigtramp_breakpoint == NULL \
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&& !handling_longjmp \
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&& ((step_range_end && step_resume_breakpoint == NULL) \
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|| trap_expected)) \
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|| bpstat_should_step ())
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while (1)
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{
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/* Clean up saved state that will become invalid. */
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flush_cached_frames ();
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registers_changed ();
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pid = target_wait (-1, &w);
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switch (w.kind)
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{
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case TARGET_WAITKIND_LOADED:
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/* Ignore it gracefully. */
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if (breakpoints_inserted)
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{
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mark_breakpoints_out ();
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insert_breakpoints ();
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}
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resume (0, TARGET_SIGNAL_0);
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continue;
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case TARGET_WAITKIND_SPURIOUS:
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resume (0, TARGET_SIGNAL_0);
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continue;
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case TARGET_WAITKIND_EXITED:
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target_terminal_ours (); /* Must do this before mourn anyway */
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if (w.value.integer)
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printf_filtered ("\nProgram exited with code 0%o.\n",
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(unsigned int)w.value.integer);
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else
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if (!batch_mode())
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printf_filtered ("\nProgram exited normally.\n");
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gdb_flush (gdb_stdout);
|
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target_mourn_inferior ();
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#ifdef NO_SINGLE_STEP
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one_stepped = 0;
|
||
#endif
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stop_print_frame = 0;
|
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goto stop_stepping;
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||
|
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case TARGET_WAITKIND_SIGNALLED:
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stop_print_frame = 0;
|
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stop_signal = w.value.sig;
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target_terminal_ours (); /* Must do this before mourn anyway */
|
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target_kill (); /* kill mourns as well */
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printf_filtered ("\nProgram terminated with signal %s, %s.\n",
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target_signal_to_name (stop_signal),
|
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target_signal_to_string (stop_signal));
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||
|
||
printf_filtered ("The program no longer exists.\n");
|
||
gdb_flush (gdb_stdout);
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#ifdef NO_SINGLE_STEP
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one_stepped = 0;
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#endif
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goto stop_stepping;
|
||
|
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case TARGET_WAITKIND_STOPPED:
|
||
/* This is the only case in which we keep going; the above cases
|
||
end in a continue or goto. */
|
||
break;
|
||
}
|
||
|
||
stop_signal = w.value.sig;
|
||
|
||
if (pid != inferior_pid)
|
||
{
|
||
int save_pid = inferior_pid;
|
||
|
||
inferior_pid = pid; /* Setup for target memory/regs */
|
||
registers_changed ();
|
||
stop_pc = read_pc ();
|
||
inferior_pid = save_pid;
|
||
registers_changed ();
|
||
}
|
||
else
|
||
stop_pc = read_pc ();
|
||
|
||
if (stop_signal == TARGET_SIGNAL_TRAP
|
||
&& breakpoint_here_p (stop_pc - DECR_PC_AFTER_BREAK))
|
||
{
|
||
if (!breakpoint_thread_match (stop_pc - DECR_PC_AFTER_BREAK, pid))
|
||
{
|
||
/* Saw a breakpoint, but it was hit by the wrong thread. Just continue. */
|
||
if (breakpoints_inserted)
|
||
{
|
||
if (pid != inferior_pid)
|
||
{
|
||
int save_pid = inferior_pid;
|
||
|
||
inferior_pid = pid;
|
||
registers_changed ();
|
||
write_pc (stop_pc - DECR_PC_AFTER_BREAK);
|
||
inferior_pid = save_pid;
|
||
registers_changed ();
|
||
}
|
||
else
|
||
write_pc (stop_pc - DECR_PC_AFTER_BREAK);
|
||
|
||
remove_breakpoints ();
|
||
target_resume (pid, 1, TARGET_SIGNAL_0); /* Single step */
|
||
/* FIXME: What if a signal arrives instead of the single-step
|
||
happening? */
|
||
target_wait (pid, &w);
|
||
insert_breakpoints ();
|
||
}
|
||
target_resume (-1, 0, TARGET_SIGNAL_0);
|
||
continue;
|
||
}
|
||
else
|
||
if (pid != inferior_pid)
|
||
goto switch_thread;
|
||
}
|
||
|
||
if (pid != inferior_pid)
|
||
{
|
||
int printed = 0;
|
||
|
||
if (!in_thread_list (pid))
|
||
{
|
||
fprintf_unfiltered (gdb_stderr, "[New %s]\n", target_pid_to_str (pid));
|
||
add_thread (pid);
|
||
|
||
target_resume (-1, 0, TARGET_SIGNAL_0);
|
||
continue;
|
||
}
|
||
else
|
||
{
|
||
if (signal_print[stop_signal])
|
||
{
|
||
char *signame;
|
||
|
||
printed = 1;
|
||
target_terminal_ours_for_output ();
|
||
printf_filtered ("\nProgram received signal %s, %s.\n",
|
||
target_signal_to_name (stop_signal),
|
||
target_signal_to_string (stop_signal));
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
if (stop_signal == TARGET_SIGNAL_TRAP
|
||
|| signal_stop[stop_signal])
|
||
{
|
||
switch_thread:
|
||
inferior_pid = pid;
|
||
printf_filtered ("[Switching to %s]\n", target_pid_to_str (pid));
|
||
|
||
flush_cached_frames ();
|
||
registers_changed ();
|
||
trap_expected = 0;
|
||
if (step_resume_breakpoint)
|
||
{
|
||
delete_breakpoint (step_resume_breakpoint);
|
||
step_resume_breakpoint = NULL;
|
||
}
|
||
|
||
/* Not sure whether we need to blow this away too,
|
||
but probably it is like the step-resume
|
||
breakpoint. */
|
||
if (through_sigtramp_breakpoint)
|
||
{
|
||
delete_breakpoint (through_sigtramp_breakpoint);
|
||
through_sigtramp_breakpoint = NULL;
|
||
}
|
||
prev_pc = 0;
|
||
prev_sp = 0;
|
||
prev_func_name = NULL;
|
||
step_range_start = 0;
|
||
step_range_end = 0;
|
||
step_frame_address = 0;
|
||
handling_longjmp = 0;
|
||
another_trap = 0;
|
||
}
|
||
else
|
||
{
|
||
if (printed)
|
||
target_terminal_inferior ();
|
||
|
||
/* Clear the signal if it should not be passed. */
|
||
if (signal_program[stop_signal] == 0)
|
||
stop_signal = TARGET_SIGNAL_0;
|
||
|
||
target_resume (pid, 0, stop_signal);
|
||
continue;
|
||
}
|
||
}
|
||
}
|
||
|
||
#ifdef NO_SINGLE_STEP
|
||
if (one_stepped)
|
||
single_step (0); /* This actually cleans up the ss */
|
||
#endif /* NO_SINGLE_STEP */
|
||
|
||
/* If PC is pointing at a nullified instruction, then step beyond
|
||
it so that the user won't be confused when GDB appears to be ready
|
||
to execute it. */
|
||
|
||
if (INSTRUCTION_NULLIFIED)
|
||
{
|
||
resume (1, 0);
|
||
continue;
|
||
}
|
||
|
||
set_current_frame (create_new_frame (read_fp (), stop_pc));
|
||
select_frame (get_current_frame (), 0);
|
||
|
||
#ifdef HAVE_STEPPABLE_WATCHPOINT
|
||
/* It may not be necessary to disable the watchpoint to stop over
|
||
it. For example, the PA can (with some kernel cooperation)
|
||
single step over a watchpoint without disabling the watchpoint. */
|
||
if (STOPPED_BY_WATCHPOINT (w))
|
||
{
|
||
resume (1, 0);
|
||
continue;
|
||
}
|
||
#endif
|
||
|
||
#ifdef HAVE_NONSTEPPABLE_WATCHPOINT
|
||
/* It is far more common to need to disable a watchpoint
|
||
to step the inferior over it. FIXME. What else might
|
||
a debug register or page protection watchpoint scheme need
|
||
here? */
|
||
if (STOPPED_BY_WATCHPOINT (w))
|
||
{
|
||
remove_breakpoints ();
|
||
resume (1, 0);
|
||
insert_breakpoints ();
|
||
continue;
|
||
}
|
||
#endif
|
||
|
||
stop_frame_address = FRAME_FP (get_current_frame ());
|
||
stop_sp = read_sp ();
|
||
stop_func_start = 0;
|
||
stop_func_name = 0;
|
||
/* Don't care about return value; stop_func_start and stop_func_name
|
||
will both be 0 if it doesn't work. */
|
||
find_pc_partial_function (stop_pc, &stop_func_name, &stop_func_start,
|
||
&stop_func_end);
|
||
stop_func_start += FUNCTION_START_OFFSET;
|
||
another_trap = 0;
|
||
bpstat_clear (&stop_bpstat);
|
||
stop_step = 0;
|
||
stop_stack_dummy = 0;
|
||
stop_print_frame = 1;
|
||
random_signal = 0;
|
||
stopped_by_random_signal = 0;
|
||
breakpoints_failed = 0;
|
||
|
||
/* Look at the cause of the stop, and decide what to do.
|
||
The alternatives are:
|
||
1) break; to really stop and return to the debugger,
|
||
2) drop through to start up again
|
||
(set another_trap to 1 to single step once)
|
||
3) set random_signal to 1, and the decision between 1 and 2
|
||
will be made according to the signal handling tables. */
|
||
|
||
/* First, distinguish signals caused by the debugger from signals
|
||
that have to do with the program's own actions.
|
||
Note that breakpoint insns may cause SIGTRAP or SIGILL
|
||
or SIGEMT, depending on the operating system version.
|
||
Here we detect when a SIGILL or SIGEMT is really a breakpoint
|
||
and change it to SIGTRAP. */
|
||
|
||
if (stop_signal == TARGET_SIGNAL_TRAP
|
||
|| (breakpoints_inserted &&
|
||
(stop_signal == TARGET_SIGNAL_ILL
|
||
|| stop_signal == TARGET_SIGNAL_EMT
|
||
))
|
||
|| stop_soon_quietly)
|
||
{
|
||
if (stop_signal == TARGET_SIGNAL_TRAP && stop_after_trap)
|
||
{
|
||
stop_print_frame = 0;
|
||
break;
|
||
}
|
||
if (stop_soon_quietly)
|
||
break;
|
||
|
||
/* Don't even think about breakpoints
|
||
if just proceeded over a breakpoint.
|
||
|
||
However, if we are trying to proceed over a breakpoint
|
||
and end up in sigtramp, then through_sigtramp_breakpoint
|
||
will be set and we should check whether we've hit the
|
||
step breakpoint. */
|
||
if (stop_signal == TARGET_SIGNAL_TRAP && trap_expected
|
||
&& through_sigtramp_breakpoint == NULL)
|
||
bpstat_clear (&stop_bpstat);
|
||
else
|
||
{
|
||
/* See if there is a breakpoint at the current PC. */
|
||
stop_bpstat = bpstat_stop_status
|
||
(&stop_pc, stop_frame_address,
|
||
#if DECR_PC_AFTER_BREAK
|
||
/* Notice the case of stepping through a jump
|
||
that lands just after a breakpoint.
|
||
Don't confuse that with hitting the breakpoint.
|
||
What we check for is that 1) stepping is going on
|
||
and 2) the pc before the last insn does not match
|
||
the address of the breakpoint before the current pc. */
|
||
(prev_pc != stop_pc - DECR_PC_AFTER_BREAK
|
||
&& CURRENTLY_STEPPING ())
|
||
#else /* DECR_PC_AFTER_BREAK zero */
|
||
0
|
||
#endif /* DECR_PC_AFTER_BREAK zero */
|
||
);
|
||
/* Following in case break condition called a
|
||
function. */
|
||
stop_print_frame = 1;
|
||
}
|
||
|
||
if (stop_signal == TARGET_SIGNAL_TRAP)
|
||
random_signal
|
||
= !(bpstat_explains_signal (stop_bpstat)
|
||
|| trap_expected
|
||
#ifndef CALL_DUMMY_BREAKPOINT_OFFSET
|
||
|| PC_IN_CALL_DUMMY (stop_pc, stop_sp, stop_frame_address)
|
||
#endif /* No CALL_DUMMY_BREAKPOINT_OFFSET. */
|
||
|| (step_range_end && step_resume_breakpoint == NULL));
|
||
else
|
||
{
|
||
random_signal
|
||
= !(bpstat_explains_signal (stop_bpstat)
|
||
/* End of a stack dummy. Some systems (e.g. Sony
|
||
news) give another signal besides SIGTRAP,
|
||
so check here as well as above. */
|
||
#ifndef CALL_DUMMY_BREAKPOINT_OFFSET
|
||
|| PC_IN_CALL_DUMMY (stop_pc, stop_sp, stop_frame_address)
|
||
#endif /* No CALL_DUMMY_BREAKPOINT_OFFSET. */
|
||
);
|
||
if (!random_signal)
|
||
stop_signal = TARGET_SIGNAL_TRAP;
|
||
}
|
||
}
|
||
else
|
||
random_signal = 1;
|
||
|
||
/* For the program's own signals, act according to
|
||
the signal handling tables. */
|
||
|
||
if (random_signal)
|
||
{
|
||
/* Signal not for debugging purposes. */
|
||
int printed = 0;
|
||
|
||
stopped_by_random_signal = 1;
|
||
|
||
if (signal_print[stop_signal])
|
||
{
|
||
char *signame;
|
||
printed = 1;
|
||
target_terminal_ours_for_output ();
|
||
printf_filtered ("\nProgram received signal %s, %s.\n",
|
||
target_signal_to_name (stop_signal),
|
||
target_signal_to_string (stop_signal));
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
if (signal_stop[stop_signal])
|
||
break;
|
||
/* If not going to stop, give terminal back
|
||
if we took it away. */
|
||
else if (printed)
|
||
target_terminal_inferior ();
|
||
|
||
/* Clear the signal if it should not be passed. */
|
||
if (signal_program[stop_signal] == 0)
|
||
stop_signal = TARGET_SIGNAL_0;
|
||
|
||
/* I'm not sure whether this needs to be check_sigtramp2 or
|
||
whether it could/should be keep_going. */
|
||
goto check_sigtramp2;
|
||
}
|
||
|
||
/* Handle cases caused by hitting a breakpoint. */
|
||
{
|
||
CORE_ADDR jmp_buf_pc;
|
||
struct bpstat_what what;
|
||
|
||
what = bpstat_what (stop_bpstat);
|
||
|
||
if (what.call_dummy)
|
||
{
|
||
stop_stack_dummy = 1;
|
||
#ifdef HP_OS_BUG
|
||
trap_expected_after_continue = 1;
|
||
#endif
|
||
}
|
||
|
||
switch (what.main_action)
|
||
{
|
||
case BPSTAT_WHAT_SET_LONGJMP_RESUME:
|
||
/* If we hit the breakpoint at longjmp, disable it for the
|
||
duration of this command. Then, install a temporary
|
||
breakpoint at the target of the jmp_buf. */
|
||
disable_longjmp_breakpoint();
|
||
remove_breakpoints ();
|
||
breakpoints_inserted = 0;
|
||
if (!GET_LONGJMP_TARGET(&jmp_buf_pc)) goto keep_going;
|
||
|
||
/* Need to blow away step-resume breakpoint, as it
|
||
interferes with us */
|
||
if (step_resume_breakpoint != NULL)
|
||
{
|
||
delete_breakpoint (step_resume_breakpoint);
|
||
step_resume_breakpoint = NULL;
|
||
}
|
||
/* Not sure whether we need to blow this away too, but probably
|
||
it is like the step-resume breakpoint. */
|
||
if (through_sigtramp_breakpoint != NULL)
|
||
{
|
||
delete_breakpoint (through_sigtramp_breakpoint);
|
||
through_sigtramp_breakpoint = NULL;
|
||
}
|
||
|
||
#if 0
|
||
/* FIXME - Need to implement nested temporary breakpoints */
|
||
if (step_over_calls > 0)
|
||
set_longjmp_resume_breakpoint(jmp_buf_pc,
|
||
get_current_frame());
|
||
else
|
||
#endif /* 0 */
|
||
set_longjmp_resume_breakpoint(jmp_buf_pc, NULL);
|
||
handling_longjmp = 1; /* FIXME */
|
||
goto keep_going;
|
||
|
||
case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME:
|
||
case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE:
|
||
remove_breakpoints ();
|
||
breakpoints_inserted = 0;
|
||
#if 0
|
||
/* FIXME - Need to implement nested temporary breakpoints */
|
||
if (step_over_calls
|
||
&& (stop_frame_address
|
||
INNER_THAN step_frame_address))
|
||
{
|
||
another_trap = 1;
|
||
goto keep_going;
|
||
}
|
||
#endif /* 0 */
|
||
disable_longjmp_breakpoint();
|
||
handling_longjmp = 0; /* FIXME */
|
||
if (what.main_action == BPSTAT_WHAT_CLEAR_LONGJMP_RESUME)
|
||
break;
|
||
/* else fallthrough */
|
||
|
||
case BPSTAT_WHAT_SINGLE:
|
||
if (breakpoints_inserted)
|
||
remove_breakpoints ();
|
||
breakpoints_inserted = 0;
|
||
another_trap = 1;
|
||
/* Still need to check other stuff, at least the case
|
||
where we are stepping and step out of the right range. */
|
||
break;
|
||
|
||
case BPSTAT_WHAT_STOP_NOISY:
|
||
stop_print_frame = 1;
|
||
|
||
/* We are about to nuke the step_resume_breakpoint and
|
||
through_sigtramp_breakpoint via the cleanup chain, so
|
||
no need to worry about it here. */
|
||
|
||
goto stop_stepping;
|
||
|
||
case BPSTAT_WHAT_STOP_SILENT:
|
||
stop_print_frame = 0;
|
||
|
||
/* We are about to nuke the step_resume_breakpoint and
|
||
through_sigtramp_breakpoint via the cleanup chain, so
|
||
no need to worry about it here. */
|
||
|
||
goto stop_stepping;
|
||
|
||
case BPSTAT_WHAT_STEP_RESUME:
|
||
delete_breakpoint (step_resume_breakpoint);
|
||
step_resume_breakpoint = NULL;
|
||
break;
|
||
|
||
case BPSTAT_WHAT_THROUGH_SIGTRAMP:
|
||
delete_breakpoint (through_sigtramp_breakpoint);
|
||
through_sigtramp_breakpoint = NULL;
|
||
|
||
/* If were waiting for a trap, hitting the step_resume_break
|
||
doesn't count as getting it. */
|
||
if (trap_expected)
|
||
another_trap = 1;
|
||
break;
|
||
|
||
case BPSTAT_WHAT_LAST:
|
||
/* Not a real code, but listed here to shut up gcc -Wall. */
|
||
|
||
case BPSTAT_WHAT_KEEP_CHECKING:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* We come here if we hit a breakpoint but should not
|
||
stop for it. Possibly we also were stepping
|
||
and should stop for that. So fall through and
|
||
test for stepping. But, if not stepping,
|
||
do not stop. */
|
||
|
||
#ifndef CALL_DUMMY_BREAKPOINT_OFFSET
|
||
/* This is the old way of detecting the end of the stack dummy.
|
||
An architecture which defines CALL_DUMMY_BREAKPOINT_OFFSET gets
|
||
handled above. As soon as we can test it on all of them, all
|
||
architectures should define it. */
|
||
|
||
/* If this is the breakpoint at the end of a stack dummy,
|
||
just stop silently, unless the user was doing an si/ni, in which
|
||
case she'd better know what she's doing. */
|
||
|
||
if (PC_IN_CALL_DUMMY (stop_pc, stop_sp, stop_frame_address)
|
||
&& !step_range_end)
|
||
{
|
||
stop_print_frame = 0;
|
||
stop_stack_dummy = 1;
|
||
#ifdef HP_OS_BUG
|
||
trap_expected_after_continue = 1;
|
||
#endif
|
||
break;
|
||
}
|
||
#endif /* No CALL_DUMMY_BREAKPOINT_OFFSET. */
|
||
|
||
if (step_resume_breakpoint)
|
||
/* Having a step-resume breakpoint overrides anything
|
||
else having to do with stepping commands until
|
||
that breakpoint is reached. */
|
||
/* I'm not sure whether this needs to be check_sigtramp2 or
|
||
whether it could/should be keep_going. */
|
||
goto check_sigtramp2;
|
||
|
||
if (step_range_end == 0)
|
||
/* Likewise if we aren't even stepping. */
|
||
/* I'm not sure whether this needs to be check_sigtramp2 or
|
||
whether it could/should be keep_going. */
|
||
goto check_sigtramp2;
|
||
|
||
/* If stepping through a line, keep going if still within it. */
|
||
if (stop_pc >= step_range_start
|
||
&& stop_pc < step_range_end
|
||
/* The step range might include the start of the
|
||
function, so if we are at the start of the
|
||
step range and either the stack or frame pointers
|
||
just changed, we've stepped outside */
|
||
&& !(stop_pc == step_range_start
|
||
&& stop_frame_address
|
||
&& (stop_sp INNER_THAN prev_sp
|
||
|| stop_frame_address != step_frame_address)))
|
||
{
|
||
/* We might be doing a BPSTAT_WHAT_SINGLE and getting a signal.
|
||
So definately need to check for sigtramp here. */
|
||
goto check_sigtramp2;
|
||
}
|
||
|
||
/* We stepped out of the stepping range. See if that was due
|
||
to a subroutine call that we should proceed to the end of. */
|
||
|
||
/* Did we just take a signal? */
|
||
if (IN_SIGTRAMP (stop_pc, stop_func_name)
|
||
&& !IN_SIGTRAMP (prev_pc, prev_func_name))
|
||
{
|
||
/* We've just taken a signal; go until we are back to
|
||
the point where we took it and one more. */
|
||
|
||
/* This code is needed at least in the following case:
|
||
The user types "next" and then a signal arrives (before
|
||
the "next" is done). */
|
||
|
||
/* Note that if we are stopped at a breakpoint, then we need
|
||
the step_resume breakpoint to override any breakpoints at
|
||
the same location, so that we will still step over the
|
||
breakpoint even though the signal happened. */
|
||
|
||
{
|
||
struct symtab_and_line sr_sal;
|
||
|
||
sr_sal.pc = prev_pc;
|
||
sr_sal.symtab = NULL;
|
||
sr_sal.line = 0;
|
||
/* We could probably be setting the frame to
|
||
prev_frame_address; the reason we don't is that it didn't used
|
||
to exist. */
|
||
step_resume_breakpoint =
|
||
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
||
if (breakpoints_inserted)
|
||
insert_breakpoints ();
|
||
}
|
||
|
||
/* If this is stepi or nexti, make sure that the stepping range
|
||
gets us past that instruction. */
|
||
if (step_range_end == 1)
|
||
/* FIXME: Does this run afoul of the code below which, if
|
||
we step into the middle of a line, resets the stepping
|
||
range? */
|
||
step_range_end = (step_range_start = prev_pc) + 1;
|
||
|
||
remove_breakpoints_on_following_step = 1;
|
||
goto keep_going;
|
||
}
|
||
|
||
if (stop_func_start)
|
||
{
|
||
/* Do this after the IN_SIGTRAMP check; it might give
|
||
an error. */
|
||
prologue_pc = stop_func_start;
|
||
SKIP_PROLOGUE (prologue_pc);
|
||
}
|
||
|
||
if ((/* Might be a non-recursive call. If the symbols are missing
|
||
enough that stop_func_start == prev_func_start even though
|
||
they are really two functions, we will treat some calls as
|
||
jumps. */
|
||
stop_func_start != prev_func_start
|
||
|
||
/* Might be a recursive call if either we have a prologue
|
||
or the call instruction itself saves the PC on the stack. */
|
||
|| prologue_pc != stop_func_start
|
||
|| stop_sp != prev_sp)
|
||
&& (/* PC is completely out of bounds of any known objfiles. Treat
|
||
like a subroutine call. */
|
||
! stop_func_start
|
||
|
||
/* If we do a call, we will be at the start of a function... */
|
||
|| stop_pc == stop_func_start
|
||
|
||
/* ...except on the Alpha with -O (and also Irix 5 and
|
||
perhaps others), in which we might call the address
|
||
after the load of gp. Since prologues don't contain
|
||
calls, we can't return to within one, and we don't
|
||
jump back into them, so this check is OK. */
|
||
|
||
|| stop_pc < prologue_pc
|
||
|
||
/* If we end up in certain places, it means we did a subroutine
|
||
call. I'm not completely sure this is necessary now that we
|
||
have the above checks with stop_func_start (and now that
|
||
find_pc_partial_function is pickier). */
|
||
|| IN_SOLIB_TRAMPOLINE (stop_pc, stop_func_name)
|
||
|
||
/* If none of the above apply, it is a jump within a function,
|
||
or a return from a subroutine. The other case is longjmp,
|
||
which can no longer happen here as long as the
|
||
handling_longjmp stuff is working. */
|
||
))
|
||
{
|
||
/* It's a subroutine call. */
|
||
|
||
if (step_over_calls == 0)
|
||
{
|
||
/* I presume that step_over_calls is only 0 when we're
|
||
supposed to be stepping at the assembly language level
|
||
("stepi"). Just stop. */
|
||
stop_step = 1;
|
||
break;
|
||
}
|
||
|
||
if (step_over_calls > 0)
|
||
/* We're doing a "next". */
|
||
goto step_over_function;
|
||
|
||
/* If we are in a function call trampoline (a stub between
|
||
the calling routine and the real function), locate the real
|
||
function. That's what tells us (a) whether we want to step
|
||
into it at all, and (b) what prologue we want to run to
|
||
the end of, if we do step into it. */
|
||
tmp = SKIP_TRAMPOLINE_CODE (stop_pc);
|
||
if (tmp != 0)
|
||
stop_func_start = tmp;
|
||
|
||
/* If we have line number information for the function we
|
||
are thinking of stepping into, step into it.
|
||
|
||
If there are several symtabs at that PC (e.g. with include
|
||
files), just want to know whether *any* of them have line
|
||
numbers. find_pc_line handles this. */
|
||
{
|
||
struct symtab_and_line tmp_sal;
|
||
|
||
tmp_sal = find_pc_line (stop_func_start, 0);
|
||
if (tmp_sal.line != 0)
|
||
goto step_into_function;
|
||
}
|
||
|
||
step_over_function:
|
||
/* A subroutine call has happened. */
|
||
{
|
||
/* Set a special breakpoint after the return */
|
||
struct symtab_and_line sr_sal;
|
||
sr_sal.pc =
|
||
ADDR_BITS_REMOVE
|
||
(SAVED_PC_AFTER_CALL (get_current_frame ()));
|
||
sr_sal.symtab = NULL;
|
||
sr_sal.line = 0;
|
||
step_resume_breakpoint =
|
||
set_momentary_breakpoint (sr_sal, get_current_frame (),
|
||
bp_step_resume);
|
||
step_resume_breakpoint->frame = prev_frame_address;
|
||
if (breakpoints_inserted)
|
||
insert_breakpoints ();
|
||
}
|
||
goto keep_going;
|
||
|
||
step_into_function:
|
||
/* Subroutine call with source code we should not step over.
|
||
Do step to the first line of code in it. */
|
||
SKIP_PROLOGUE (stop_func_start);
|
||
sal = find_pc_line (stop_func_start, 0);
|
||
/* Use the step_resume_break to step until
|
||
the end of the prologue, even if that involves jumps
|
||
(as it seems to on the vax under 4.2). */
|
||
/* If the prologue ends in the middle of a source line,
|
||
continue to the end of that source line (if it is still
|
||
within the function). Otherwise, just go to end of prologue. */
|
||
#ifdef PROLOGUE_FIRSTLINE_OVERLAP
|
||
/* no, don't either. It skips any code that's
|
||
legitimately on the first line. */
|
||
#else
|
||
if (sal.end && sal.pc != stop_func_start && sal.end < stop_func_end)
|
||
stop_func_start = sal.end;
|
||
#endif
|
||
|
||
if (stop_func_start == stop_pc)
|
||
{
|
||
/* We are already there: stop now. */
|
||
stop_step = 1;
|
||
break;
|
||
}
|
||
else
|
||
/* Put the step-breakpoint there and go until there. */
|
||
{
|
||
struct symtab_and_line sr_sal;
|
||
|
||
sr_sal.pc = stop_func_start;
|
||
sr_sal.symtab = NULL;
|
||
sr_sal.line = 0;
|
||
/* Do not specify what the fp should be when we stop
|
||
since on some machines the prologue
|
||
is where the new fp value is established. */
|
||
step_resume_breakpoint =
|
||
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
||
if (breakpoints_inserted)
|
||
insert_breakpoints ();
|
||
|
||
/* And make sure stepping stops right away then. */
|
||
step_range_end = step_range_start;
|
||
}
|
||
goto keep_going;
|
||
}
|
||
|
||
/* We've wandered out of the step range. */
|
||
|
||
sal = find_pc_line(stop_pc, 0);
|
||
|
||
if (step_range_end == 1)
|
||
{
|
||
/* It is stepi or nexti. We always want to stop stepping after
|
||
one instruction. */
|
||
stop_step = 1;
|
||
break;
|
||
}
|
||
|
||
if (sal.line == 0)
|
||
{
|
||
/* We have no line number information. That means to stop
|
||
stepping (does this always happen right after one instruction,
|
||
when we do "s" in a function with no line numbers,
|
||
or can this happen as a result of a return or longjmp?). */
|
||
stop_step = 1;
|
||
break;
|
||
}
|
||
|
||
if (stop_pc == sal.pc
|
||
&& (current_line != sal.line || current_symtab != sal.symtab))
|
||
{
|
||
/* We are at the start of a different line. So stop. Note that
|
||
we don't stop if we step into the middle of a different line.
|
||
That is said to make things like for (;;) statements work
|
||
better. */
|
||
stop_step = 1;
|
||
break;
|
||
}
|
||
|
||
/* We aren't done stepping.
|
||
|
||
Optimize by setting the stepping range to the line.
|
||
(We might not be in the original line, but if we entered a
|
||
new line in mid-statement, we continue stepping. This makes
|
||
things like for(;;) statements work better.) */
|
||
|
||
if (stop_func_end && sal.end >= stop_func_end)
|
||
{
|
||
/* If this is the last line of the function, don't keep stepping
|
||
(it would probably step us out of the function).
|
||
This is particularly necessary for a one-line function,
|
||
in which after skipping the prologue we better stop even though
|
||
we will be in mid-line. */
|
||
stop_step = 1;
|
||
break;
|
||
}
|
||
step_range_start = sal.pc;
|
||
step_range_end = sal.end;
|
||
goto keep_going;
|
||
|
||
check_sigtramp2:
|
||
if (trap_expected
|
||
&& IN_SIGTRAMP (stop_pc, stop_func_name)
|
||
&& !IN_SIGTRAMP (prev_pc, prev_func_name))
|
||
{
|
||
/* What has happened here is that we have just stepped the inferior
|
||
with a signal (because it is a signal which shouldn't make
|
||
us stop), thus stepping into sigtramp.
|
||
|
||
So we need to set a step_resume_break_address breakpoint
|
||
and continue until we hit it, and then step. FIXME: This should
|
||
be more enduring than a step_resume breakpoint; we should know
|
||
that we will later need to keep going rather than re-hitting
|
||
the breakpoint here (see testsuite/gdb.t06/signals.exp where
|
||
it says "exceedingly difficult"). */
|
||
struct symtab_and_line sr_sal;
|
||
|
||
sr_sal.pc = prev_pc;
|
||
sr_sal.symtab = NULL;
|
||
sr_sal.line = 0;
|
||
/* We perhaps could set the frame if we kept track of what
|
||
the frame corresponding to prev_pc was. But we don't,
|
||
so don't. */
|
||
through_sigtramp_breakpoint =
|
||
set_momentary_breakpoint (sr_sal, NULL, bp_through_sigtramp);
|
||
if (breakpoints_inserted)
|
||
insert_breakpoints ();
|
||
|
||
remove_breakpoints_on_following_step = 1;
|
||
another_trap = 1;
|
||
}
|
||
|
||
keep_going:
|
||
/* Come to this label when you need to resume the inferior.
|
||
It's really much cleaner to do a goto than a maze of if-else
|
||
conditions. */
|
||
|
||
/* Save the pc before execution, to compare with pc after stop. */
|
||
prev_pc = read_pc (); /* Might have been DECR_AFTER_BREAK */
|
||
prev_func_start = stop_func_start; /* Ok, since if DECR_PC_AFTER
|
||
BREAK is defined, the
|
||
original pc would not have
|
||
been at the start of a
|
||
function. */
|
||
prev_func_name = stop_func_name;
|
||
prev_sp = stop_sp;
|
||
prev_frame_address = stop_frame_address;
|
||
|
||
/* If we did not do break;, it means we should keep
|
||
running the inferior and not return to debugger. */
|
||
|
||
if (trap_expected && stop_signal != TARGET_SIGNAL_TRAP)
|
||
{
|
||
/* We took a signal (which we are supposed to pass through to
|
||
the inferior, else we'd have done a break above) and we
|
||
haven't yet gotten our trap. Simply continue. */
|
||
resume (CURRENTLY_STEPPING (), stop_signal);
|
||
}
|
||
else
|
||
{
|
||
/* Either the trap was not expected, but we are continuing
|
||
anyway (the user asked that this signal be passed to the
|
||
child)
|
||
-- or --
|
||
The signal was SIGTRAP, e.g. it was our signal, but we
|
||
decided we should resume from it.
|
||
|
||
We're going to run this baby now!
|
||
|
||
Insert breakpoints now, unless we are trying
|
||
to one-proceed past a breakpoint. */
|
||
/* If we've just finished a special step resume and we don't
|
||
want to hit a breakpoint, pull em out. */
|
||
if (step_resume_breakpoint == NULL
|
||
&& through_sigtramp_breakpoint == NULL
|
||
&& remove_breakpoints_on_following_step)
|
||
{
|
||
remove_breakpoints_on_following_step = 0;
|
||
remove_breakpoints ();
|
||
breakpoints_inserted = 0;
|
||
}
|
||
else if (!breakpoints_inserted &&
|
||
(through_sigtramp_breakpoint != NULL || !another_trap))
|
||
{
|
||
breakpoints_failed = insert_breakpoints ();
|
||
if (breakpoints_failed)
|
||
break;
|
||
breakpoints_inserted = 1;
|
||
}
|
||
|
||
trap_expected = another_trap;
|
||
|
||
if (stop_signal == TARGET_SIGNAL_TRAP)
|
||
stop_signal = TARGET_SIGNAL_0;
|
||
|
||
#ifdef SHIFT_INST_REGS
|
||
/* I'm not sure when this following segment applies. I do know, now,
|
||
that we shouldn't rewrite the regs when we were stopped by a
|
||
random signal from the inferior process. */
|
||
/* FIXME: Shouldn't this be based on the valid bit of the SXIP?
|
||
(this is only used on the 88k). */
|
||
|
||
if (!bpstat_explains_signal (stop_bpstat)
|
||
&& (stop_signal != TARGET_SIGNAL_CHLD)
|
||
&& !stopped_by_random_signal)
|
||
SHIFT_INST_REGS();
|
||
#endif /* SHIFT_INST_REGS */
|
||
|
||
resume (CURRENTLY_STEPPING (), stop_signal);
|
||
}
|
||
}
|
||
|
||
stop_stepping:
|
||
if (target_has_execution)
|
||
{
|
||
/* Assuming the inferior still exists, set these up for next
|
||
time, just like we did above if we didn't break out of the
|
||
loop. */
|
||
prev_pc = read_pc ();
|
||
prev_func_start = stop_func_start;
|
||
prev_func_name = stop_func_name;
|
||
prev_sp = stop_sp;
|
||
prev_frame_address = stop_frame_address;
|
||
}
|
||
do_cleanups (old_cleanups);
|
||
}
|
||
|
||
/* Here to return control to GDB when the inferior stops for real.
|
||
Print appropriate messages, remove breakpoints, give terminal our modes.
|
||
|
||
STOP_PRINT_FRAME nonzero means print the executing frame
|
||
(pc, function, args, file, line number and line text).
|
||
BREAKPOINTS_FAILED nonzero means stop was due to error
|
||
attempting to insert breakpoints. */
|
||
|
||
void
|
||
normal_stop ()
|
||
{
|
||
/* Make sure that the current_frame's pc is correct. This
|
||
is a correction for setting up the frame info before doing
|
||
DECR_PC_AFTER_BREAK */
|
||
if (target_has_execution && get_current_frame())
|
||
(get_current_frame ())->pc = read_pc ();
|
||
|
||
if (breakpoints_failed)
|
||
{
|
||
target_terminal_ours_for_output ();
|
||
print_sys_errmsg ("ptrace", breakpoints_failed);
|
||
printf_filtered ("Stopped; cannot insert breakpoints.\n\
|
||
The same program may be running in another process.\n");
|
||
}
|
||
|
||
if (target_has_execution && breakpoints_inserted)
|
||
if (remove_breakpoints ())
|
||
{
|
||
target_terminal_ours_for_output ();
|
||
printf_filtered ("Cannot remove breakpoints because program is no longer writable.\n\
|
||
It might be running in another process.\n\
|
||
Further execution is probably impossible.\n");
|
||
}
|
||
|
||
breakpoints_inserted = 0;
|
||
|
||
/* Delete the breakpoint we stopped at, if it wants to be deleted.
|
||
Delete any breakpoint that is to be deleted at the next stop. */
|
||
|
||
breakpoint_auto_delete (stop_bpstat);
|
||
|
||
/* If an auto-display called a function and that got a signal,
|
||
delete that auto-display to avoid an infinite recursion. */
|
||
|
||
if (stopped_by_random_signal)
|
||
disable_current_display ();
|
||
|
||
if (step_multi && stop_step)
|
||
return;
|
||
|
||
target_terminal_ours ();
|
||
|
||
/* Look up the hook_stop and run it if it exists. */
|
||
|
||
if (stop_command->hook)
|
||
{
|
||
catch_errors (hook_stop_stub, (char *)stop_command->hook,
|
||
"Error while running hook_stop:\n", RETURN_MASK_ALL);
|
||
}
|
||
|
||
if (!target_has_stack)
|
||
return;
|
||
|
||
/* Select innermost stack frame except on return from a stack dummy routine,
|
||
or if the program has exited. Print it without a level number if
|
||
we have changed functions or hit a breakpoint. Print source line
|
||
if we have one. */
|
||
if (!stop_stack_dummy)
|
||
{
|
||
if (stop_print_frame)
|
||
{
|
||
int source_only;
|
||
|
||
source_only = bpstat_print (stop_bpstat);
|
||
source_only = source_only ||
|
||
( stop_step
|
||
&& step_frame_address == stop_frame_address
|
||
&& step_start_function == find_pc_function (stop_pc));
|
||
|
||
print_stack_frame (selected_frame, -1, source_only? -1: 1);
|
||
|
||
/* Display the auto-display expressions. */
|
||
do_displays ();
|
||
}
|
||
}
|
||
|
||
/* Save the function value return registers, if we care.
|
||
We might be about to restore their previous contents. */
|
||
if (proceed_to_finish)
|
||
read_register_bytes (0, stop_registers, REGISTER_BYTES);
|
||
|
||
if (stop_stack_dummy)
|
||
{
|
||
/* Pop the empty frame that contains the stack dummy.
|
||
POP_FRAME ends with a setting of the current frame, so we
|
||
can use that next. */
|
||
POP_FRAME;
|
||
/* Set stop_pc to what it was before we called the function. Can't rely
|
||
on restore_inferior_status because that only gets called if we don't
|
||
stop in the called function. */
|
||
stop_pc = read_pc();
|
||
select_frame (get_current_frame (), 0);
|
||
}
|
||
}
|
||
|
||
static int
|
||
hook_stop_stub (cmd)
|
||
char *cmd;
|
||
{
|
||
execute_user_command ((struct cmd_list_element *)cmd, 0);
|
||
return (0);
|
||
}
|
||
|
||
int signal_stop_state (signo)
|
||
int signo;
|
||
{
|
||
return signal_stop[signo];
|
||
}
|
||
|
||
int signal_print_state (signo)
|
||
int signo;
|
||
{
|
||
return signal_print[signo];
|
||
}
|
||
|
||
int signal_pass_state (signo)
|
||
int signo;
|
||
{
|
||
return signal_program[signo];
|
||
}
|
||
|
||
static void
|
||
sig_print_header ()
|
||
{
|
||
printf_filtered ("\
|
||
Signal Stop\tPrint\tPass to program\tDescription\n");
|
||
}
|
||
|
||
static void
|
||
sig_print_info (oursig)
|
||
enum target_signal oursig;
|
||
{
|
||
char *name = target_signal_to_name (oursig);
|
||
printf_filtered ("%s", name);
|
||
printf_filtered ("%*.*s ", 13 - strlen (name), 13 - strlen (name),
|
||
" ");
|
||
printf_filtered ("%s\t", signal_stop[oursig] ? "Yes" : "No");
|
||
printf_filtered ("%s\t", signal_print[oursig] ? "Yes" : "No");
|
||
printf_filtered ("%s\t\t", signal_program[oursig] ? "Yes" : "No");
|
||
printf_filtered ("%s\n", target_signal_to_string (oursig));
|
||
}
|
||
|
||
/* Specify how various signals in the inferior should be handled. */
|
||
|
||
static void
|
||
handle_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
char **argv;
|
||
int digits, wordlen;
|
||
int sigfirst, signum, siglast;
|
||
enum target_signal oursig;
|
||
int allsigs;
|
||
int nsigs;
|
||
unsigned char *sigs;
|
||
struct cleanup *old_chain;
|
||
|
||
if (args == NULL)
|
||
{
|
||
error_no_arg ("signal to handle");
|
||
}
|
||
|
||
/* Allocate and zero an array of flags for which signals to handle. */
|
||
|
||
nsigs = (int)TARGET_SIGNAL_LAST;
|
||
sigs = (unsigned char *) alloca (nsigs);
|
||
memset (sigs, 0, nsigs);
|
||
|
||
/* Break the command line up into args. */
|
||
|
||
argv = buildargv (args);
|
||
if (argv == NULL)
|
||
{
|
||
nomem (0);
|
||
}
|
||
old_chain = make_cleanup (freeargv, (char *) argv);
|
||
|
||
/* Walk through the args, looking for signal oursigs, signal names, and
|
||
actions. Signal numbers and signal names may be interspersed with
|
||
actions, with the actions being performed for all signals cumulatively
|
||
specified. Signal ranges can be specified as <LOW>-<HIGH>. */
|
||
|
||
while (*argv != NULL)
|
||
{
|
||
wordlen = strlen (*argv);
|
||
for (digits = 0; isdigit ((*argv)[digits]); digits++) {;}
|
||
allsigs = 0;
|
||
sigfirst = siglast = -1;
|
||
|
||
if (wordlen >= 1 && !strncmp (*argv, "all", wordlen))
|
||
{
|
||
/* Apply action to all signals except those used by the
|
||
debugger. Silently skip those. */
|
||
allsigs = 1;
|
||
sigfirst = 0;
|
||
siglast = nsigs - 1;
|
||
}
|
||
else if (wordlen >= 1 && !strncmp (*argv, "stop", wordlen))
|
||
{
|
||
SET_SIGS (nsigs, sigs, signal_stop);
|
||
SET_SIGS (nsigs, sigs, signal_print);
|
||
}
|
||
else if (wordlen >= 1 && !strncmp (*argv, "ignore", wordlen))
|
||
{
|
||
UNSET_SIGS (nsigs, sigs, signal_program);
|
||
}
|
||
else if (wordlen >= 2 && !strncmp (*argv, "print", wordlen))
|
||
{
|
||
SET_SIGS (nsigs, sigs, signal_print);
|
||
}
|
||
else if (wordlen >= 2 && !strncmp (*argv, "pass", wordlen))
|
||
{
|
||
SET_SIGS (nsigs, sigs, signal_program);
|
||
}
|
||
else if (wordlen >= 3 && !strncmp (*argv, "nostop", wordlen))
|
||
{
|
||
UNSET_SIGS (nsigs, sigs, signal_stop);
|
||
}
|
||
else if (wordlen >= 3 && !strncmp (*argv, "noignore", wordlen))
|
||
{
|
||
SET_SIGS (nsigs, sigs, signal_program);
|
||
}
|
||
else if (wordlen >= 4 && !strncmp (*argv, "noprint", wordlen))
|
||
{
|
||
UNSET_SIGS (nsigs, sigs, signal_print);
|
||
UNSET_SIGS (nsigs, sigs, signal_stop);
|
||
}
|
||
else if (wordlen >= 4 && !strncmp (*argv, "nopass", wordlen))
|
||
{
|
||
UNSET_SIGS (nsigs, sigs, signal_program);
|
||
}
|
||
else if (digits > 0)
|
||
{
|
||
/* It is numeric. The numeric signal refers to our own internal
|
||
signal numbering from target.h, not to host/target signal number.
|
||
This is a feature; users really should be using symbolic names
|
||
anyway, and the common ones like SIGHUP, SIGINT, SIGALRM, etc.
|
||
will work right anyway. */
|
||
|
||
sigfirst = siglast = atoi (*argv);
|
||
if ((*argv)[digits] == '-')
|
||
{
|
||
siglast = atoi ((*argv) + digits + 1);
|
||
}
|
||
if (sigfirst > siglast)
|
||
{
|
||
/* Bet he didn't figure we'd think of this case... */
|
||
signum = sigfirst;
|
||
sigfirst = siglast;
|
||
siglast = signum;
|
||
}
|
||
if (sigfirst < 0 || sigfirst >= nsigs)
|
||
{
|
||
error ("Signal %d not in range 0-%d", sigfirst, nsigs - 1);
|
||
}
|
||
if (siglast < 0 || siglast >= nsigs)
|
||
{
|
||
error ("Signal %d not in range 0-%d", siglast, nsigs - 1);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
oursig = target_signal_from_name (*argv);
|
||
if (oursig != TARGET_SIGNAL_UNKNOWN)
|
||
{
|
||
sigfirst = siglast = (int)oursig;
|
||
}
|
||
else
|
||
{
|
||
/* Not a number and not a recognized flag word => complain. */
|
||
error ("Unrecognized or ambiguous flag word: \"%s\".", *argv);
|
||
}
|
||
}
|
||
|
||
/* If any signal numbers or symbol names were found, set flags for
|
||
which signals to apply actions to. */
|
||
|
||
for (signum = sigfirst; signum >= 0 && signum <= siglast; signum++)
|
||
{
|
||
switch ((enum target_signal)signum)
|
||
{
|
||
case TARGET_SIGNAL_TRAP:
|
||
case TARGET_SIGNAL_INT:
|
||
if (!allsigs && !sigs[signum])
|
||
{
|
||
if (query ("%s is used by the debugger.\n\
|
||
Are you sure you want to change it? ",
|
||
target_signal_to_name
|
||
((enum target_signal)signum)))
|
||
{
|
||
sigs[signum] = 1;
|
||
}
|
||
else
|
||
{
|
||
printf_unfiltered ("Not confirmed, unchanged.\n");
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
}
|
||
break;
|
||
default:
|
||
sigs[signum] = 1;
|
||
break;
|
||
}
|
||
}
|
||
|
||
argv++;
|
||
}
|
||
|
||
target_notice_signals(inferior_pid);
|
||
|
||
if (from_tty)
|
||
{
|
||
/* Show the results. */
|
||
sig_print_header ();
|
||
for (signum = 0; signum < nsigs; signum++)
|
||
{
|
||
if (sigs[signum])
|
||
{
|
||
sig_print_info (signum);
|
||
}
|
||
}
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
/* Print current contents of the tables set by the handle command.
|
||
It is possible we should just be printing signals actually used
|
||
by the current target (but for things to work right when switching
|
||
targets, all signals should be in the signal tables). */
|
||
|
||
static void
|
||
signals_info (signum_exp, from_tty)
|
||
char *signum_exp;
|
||
int from_tty;
|
||
{
|
||
enum target_signal oursig;
|
||
sig_print_header ();
|
||
|
||
if (signum_exp)
|
||
{
|
||
/* First see if this is a symbol name. */
|
||
oursig = target_signal_from_name (signum_exp);
|
||
if (oursig == TARGET_SIGNAL_UNKNOWN)
|
||
{
|
||
/* Nope, maybe it's an address which evaluates to a signal
|
||
number. */
|
||
/* The numeric signal refers to our own internal
|
||
signal numbering from target.h, not to host/target signal number.
|
||
This is a feature; users really should be using symbolic names
|
||
anyway, and the common ones like SIGHUP, SIGINT, SIGALRM, etc.
|
||
will work right anyway. */
|
||
int i = parse_and_eval_address (signum_exp);
|
||
if (i >= (int)TARGET_SIGNAL_LAST
|
||
|| i < 0
|
||
|| i == (int)TARGET_SIGNAL_UNKNOWN
|
||
|| i == (int)TARGET_SIGNAL_DEFAULT)
|
||
error ("Signal number out of bounds.");
|
||
oursig = (enum target_signal)i;
|
||
}
|
||
sig_print_info (oursig);
|
||
return;
|
||
}
|
||
|
||
printf_filtered ("\n");
|
||
/* These ugly casts brought to you by the native VAX compiler. */
|
||
for (oursig = TARGET_SIGNAL_FIRST;
|
||
(int)oursig < (int)TARGET_SIGNAL_LAST;
|
||
oursig = (enum target_signal)((int)oursig + 1))
|
||
{
|
||
QUIT;
|
||
|
||
if (oursig != TARGET_SIGNAL_UNKNOWN
|
||
&& oursig != TARGET_SIGNAL_DEFAULT
|
||
&& oursig != TARGET_SIGNAL_0)
|
||
sig_print_info (oursig);
|
||
}
|
||
|
||
printf_filtered ("\nUse the \"handle\" command to change these tables.\n");
|
||
}
|
||
|
||
/* Save all of the information associated with the inferior<==>gdb
|
||
connection. INF_STATUS is a pointer to a "struct inferior_status"
|
||
(defined in inferior.h). */
|
||
|
||
void
|
||
save_inferior_status (inf_status, restore_stack_info)
|
||
struct inferior_status *inf_status;
|
||
int restore_stack_info;
|
||
{
|
||
inf_status->stop_signal = stop_signal;
|
||
inf_status->stop_pc = stop_pc;
|
||
inf_status->stop_frame_address = stop_frame_address;
|
||
inf_status->stop_step = stop_step;
|
||
inf_status->stop_stack_dummy = stop_stack_dummy;
|
||
inf_status->stopped_by_random_signal = stopped_by_random_signal;
|
||
inf_status->trap_expected = trap_expected;
|
||
inf_status->step_range_start = step_range_start;
|
||
inf_status->step_range_end = step_range_end;
|
||
inf_status->step_frame_address = step_frame_address;
|
||
inf_status->step_over_calls = step_over_calls;
|
||
inf_status->stop_after_trap = stop_after_trap;
|
||
inf_status->stop_soon_quietly = stop_soon_quietly;
|
||
/* Save original bpstat chain here; replace it with copy of chain.
|
||
If caller's caller is walking the chain, they'll be happier if we
|
||
hand them back the original chain when restore_i_s is called. */
|
||
inf_status->stop_bpstat = stop_bpstat;
|
||
stop_bpstat = bpstat_copy (stop_bpstat);
|
||
inf_status->breakpoint_proceeded = breakpoint_proceeded;
|
||
inf_status->restore_stack_info = restore_stack_info;
|
||
inf_status->proceed_to_finish = proceed_to_finish;
|
||
|
||
memcpy (inf_status->stop_registers, stop_registers, REGISTER_BYTES);
|
||
|
||
read_register_bytes (0, inf_status->registers, REGISTER_BYTES);
|
||
|
||
record_selected_frame (&(inf_status->selected_frame_address),
|
||
&(inf_status->selected_level));
|
||
return;
|
||
}
|
||
|
||
struct restore_selected_frame_args {
|
||
FRAME_ADDR frame_address;
|
||
int level;
|
||
};
|
||
|
||
static int restore_selected_frame PARAMS ((char *));
|
||
|
||
/* Restore the selected frame. args is really a struct
|
||
restore_selected_frame_args * (declared as char * for catch_errors)
|
||
telling us what frame to restore. Returns 1 for success, or 0 for
|
||
failure. An error message will have been printed on error. */
|
||
static int
|
||
restore_selected_frame (args)
|
||
char *args;
|
||
{
|
||
struct restore_selected_frame_args *fr =
|
||
(struct restore_selected_frame_args *) args;
|
||
FRAME fid;
|
||
int level = fr->level;
|
||
|
||
fid = find_relative_frame (get_current_frame (), &level);
|
||
|
||
/* If inf_status->selected_frame_address is NULL, there was no
|
||
previously selected frame. */
|
||
if (fid == 0 ||
|
||
FRAME_FP (fid) != fr->frame_address ||
|
||
level != 0)
|
||
{
|
||
warning ("Unable to restore previously selected frame.\n");
|
||
return 0;
|
||
}
|
||
select_frame (fid, fr->level);
|
||
return(1);
|
||
}
|
||
|
||
void
|
||
restore_inferior_status (inf_status)
|
||
struct inferior_status *inf_status;
|
||
{
|
||
stop_signal = inf_status->stop_signal;
|
||
stop_pc = inf_status->stop_pc;
|
||
stop_frame_address = inf_status->stop_frame_address;
|
||
stop_step = inf_status->stop_step;
|
||
stop_stack_dummy = inf_status->stop_stack_dummy;
|
||
stopped_by_random_signal = inf_status->stopped_by_random_signal;
|
||
trap_expected = inf_status->trap_expected;
|
||
step_range_start = inf_status->step_range_start;
|
||
step_range_end = inf_status->step_range_end;
|
||
step_frame_address = inf_status->step_frame_address;
|
||
step_over_calls = inf_status->step_over_calls;
|
||
stop_after_trap = inf_status->stop_after_trap;
|
||
stop_soon_quietly = inf_status->stop_soon_quietly;
|
||
bpstat_clear (&stop_bpstat);
|
||
stop_bpstat = inf_status->stop_bpstat;
|
||
breakpoint_proceeded = inf_status->breakpoint_proceeded;
|
||
proceed_to_finish = inf_status->proceed_to_finish;
|
||
|
||
memcpy (stop_registers, inf_status->stop_registers, REGISTER_BYTES);
|
||
|
||
/* The inferior can be gone if the user types "print exit(0)"
|
||
(and perhaps other times). */
|
||
if (target_has_execution)
|
||
write_register_bytes (0, inf_status->registers, REGISTER_BYTES);
|
||
|
||
/* The inferior can be gone if the user types "print exit(0)"
|
||
(and perhaps other times). */
|
||
|
||
/* FIXME: If we are being called after stopping in a function which
|
||
is called from gdb, we should not be trying to restore the
|
||
selected frame; it just prints a spurious error message (The
|
||
message is useful, however, in detecting bugs in gdb (like if gdb
|
||
clobbers the stack)). In fact, should we be restoring the
|
||
inferior status at all in that case? . */
|
||
|
||
if (target_has_stack && inf_status->restore_stack_info)
|
||
{
|
||
struct restore_selected_frame_args fr;
|
||
fr.level = inf_status->selected_level;
|
||
fr.frame_address = inf_status->selected_frame_address;
|
||
/* The point of catch_errors is that if the stack is clobbered,
|
||
walking the stack might encounter a garbage pointer and error()
|
||
trying to dereference it. */
|
||
if (catch_errors (restore_selected_frame, &fr,
|
||
"Unable to restore previously selected frame:\n",
|
||
RETURN_MASK_ERROR) == 0)
|
||
/* Error in restoring the selected frame. Select the innermost
|
||
frame. */
|
||
select_frame (get_current_frame (), 0);
|
||
}
|
||
}
|
||
|
||
|
||
void
|
||
_initialize_infrun ()
|
||
{
|
||
register int i;
|
||
register int numsigs;
|
||
|
||
add_info ("signals", signals_info,
|
||
"What debugger does when program gets various signals.\n\
|
||
Specify a signal number as argument to print info on that signal only.");
|
||
add_info_alias ("handle", "signals", 0);
|
||
|
||
add_com ("handle", class_run, handle_command,
|
||
"Specify how to handle a signal.\n\
|
||
Args are signal numbers and actions to apply to those signals.\n\
|
||
Signal numbers may be numeric (ex. 11) or symbolic (ex. SIGSEGV).\n\
|
||
Numeric ranges may be specified with the form LOW-HIGH (ex. 14-21).\n\
|
||
The special arg \"all\" is recognized to mean all signals except those\n\
|
||
used by the debugger, typically SIGTRAP and SIGINT.\n\
|
||
Recognized actions include \"stop\", \"nostop\", \"print\", \"noprint\",\n\
|
||
\"pass\", \"nopass\", \"ignore\", or \"noignore\".\n\
|
||
Stop means reenter debugger if this signal happens (implies print).\n\
|
||
Print means print a message if this signal happens.\n\
|
||
Pass means let program see this signal; otherwise program doesn't know.\n\
|
||
Ignore is a synonym for nopass and noignore is a synonym for pass.\n\
|
||
Pass and Stop may be combined.");
|
||
|
||
stop_command = add_cmd ("stop", class_obscure, not_just_help_class_command,
|
||
"There is no `stop' command, but you can set a hook on `stop'.\n\
|
||
This allows you to set a list of commands to be run each time execution\n\
|
||
of the program stops.", &cmdlist);
|
||
|
||
numsigs = (int)TARGET_SIGNAL_LAST;
|
||
signal_stop = (unsigned char *)
|
||
xmalloc (sizeof (signal_stop[0]) * numsigs);
|
||
signal_print = (unsigned char *)
|
||
xmalloc (sizeof (signal_print[0]) * numsigs);
|
||
signal_program = (unsigned char *)
|
||
xmalloc (sizeof (signal_program[0]) * numsigs);
|
||
for (i = 0; i < numsigs; i++)
|
||
{
|
||
signal_stop[i] = 1;
|
||
signal_print[i] = 1;
|
||
signal_program[i] = 1;
|
||
}
|
||
|
||
/* Signals caused by debugger's own actions
|
||
should not be given to the program afterwards. */
|
||
signal_program[TARGET_SIGNAL_TRAP] = 0;
|
||
signal_program[TARGET_SIGNAL_INT] = 0;
|
||
|
||
/* Signals that are not errors should not normally enter the debugger. */
|
||
signal_stop[TARGET_SIGNAL_ALRM] = 0;
|
||
signal_print[TARGET_SIGNAL_ALRM] = 0;
|
||
signal_stop[TARGET_SIGNAL_VTALRM] = 0;
|
||
signal_print[TARGET_SIGNAL_VTALRM] = 0;
|
||
signal_stop[TARGET_SIGNAL_PROF] = 0;
|
||
signal_print[TARGET_SIGNAL_PROF] = 0;
|
||
signal_stop[TARGET_SIGNAL_CHLD] = 0;
|
||
signal_print[TARGET_SIGNAL_CHLD] = 0;
|
||
signal_stop[TARGET_SIGNAL_IO] = 0;
|
||
signal_print[TARGET_SIGNAL_IO] = 0;
|
||
signal_stop[TARGET_SIGNAL_POLL] = 0;
|
||
signal_print[TARGET_SIGNAL_POLL] = 0;
|
||
signal_stop[TARGET_SIGNAL_URG] = 0;
|
||
signal_print[TARGET_SIGNAL_URG] = 0;
|
||
}
|