1642 lines
60 KiB
C++
1642 lines
60 KiB
C++
/* Data structures associated with breakpoints in GDB.
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Copyright (C) 1992-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (BREAKPOINT_H)
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#define BREAKPOINT_H 1
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#include "frame.h"
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#include "value.h"
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#include "vec.h"
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#include "ax.h"
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#include "command.h"
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#include "break-common.h"
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#include "probe.h"
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#include "location.h"
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#include <vector>
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struct value;
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struct block;
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struct gdbpy_breakpoint_object;
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struct gdbscm_breakpoint_object;
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struct number_or_range_parser;
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struct thread_info;
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struct bpstats;
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struct bp_location;
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struct linespec_result;
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struct linespec_sals;
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/* Why are we removing the breakpoint from the target? */
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enum remove_bp_reason
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{
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/* A regular remove. Remove the breakpoint and forget everything
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about it. */
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REMOVE_BREAKPOINT,
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/* Detach the breakpoints from a fork child. */
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DETACH_BREAKPOINT,
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};
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/* This is the maximum number of bytes a breakpoint instruction can
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take. Feel free to increase it. It's just used in a few places to
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size arrays that should be independent of the target
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architecture. */
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#define BREAKPOINT_MAX 16
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/* Type of breakpoint. */
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enum bptype
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{
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bp_none = 0, /* Eventpoint has been deleted */
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bp_breakpoint, /* Normal breakpoint */
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bp_hardware_breakpoint, /* Hardware assisted breakpoint */
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bp_single_step, /* Software single-step */
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bp_until, /* used by until command */
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bp_finish, /* used by finish command */
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bp_watchpoint, /* Watchpoint */
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bp_hardware_watchpoint, /* Hardware assisted watchpoint */
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bp_read_watchpoint, /* read watchpoint, (hardware assisted) */
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bp_access_watchpoint, /* access watchpoint, (hardware assisted) */
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bp_longjmp, /* secret breakpoint to find longjmp() */
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bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
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/* Breakpoint placed to the same location(s) like bp_longjmp but used to
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protect against stale DUMMY_FRAME. Multiple bp_longjmp_call_dummy and
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one bp_call_dummy are chained together by related_breakpoint for each
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DUMMY_FRAME. */
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bp_longjmp_call_dummy,
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/* An internal breakpoint that is installed on the unwinder's
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debug hook. */
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bp_exception,
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/* An internal breakpoint that is set at the point where an
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exception will land. */
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bp_exception_resume,
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/* Used by wait_for_inferior for stepping over subroutine calls,
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and for skipping prologues. */
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bp_step_resume,
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/* Used by wait_for_inferior for stepping over signal
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handlers. */
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bp_hp_step_resume,
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/* Used to detect when a watchpoint expression has gone out of
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scope. These breakpoints are usually not visible to the user.
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This breakpoint has some interesting properties:
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1) There's always a 1:1 mapping between watchpoints
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on local variables and watchpoint_scope breakpoints.
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2) It automatically deletes itself and the watchpoint it's
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associated with when hit.
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3) It can never be disabled. */
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bp_watchpoint_scope,
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/* The breakpoint at the end of a call dummy. See bp_longjmp_call_dummy it
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is chained with by related_breakpoint. */
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bp_call_dummy,
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/* A breakpoint set on std::terminate, that is used to catch
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otherwise uncaught exceptions thrown during an inferior call. */
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bp_std_terminate,
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/* Some dynamic linkers (HP, maybe Solaris) can arrange for special
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code in the inferior to run when significant events occur in the
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dynamic linker (for example a library is loaded or unloaded).
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By placing a breakpoint in this magic code GDB will get control
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when these significant events occur. GDB can then re-examine
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the dynamic linker's data structures to discover any newly loaded
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dynamic libraries. */
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bp_shlib_event,
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/* Some multi-threaded systems can arrange for a location in the
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inferior to be executed when certain thread-related events occur
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(such as thread creation or thread death).
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By placing a breakpoint at one of these locations, GDB will get
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control when these events occur. GDB can then update its thread
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lists etc. */
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bp_thread_event,
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/* On the same principal, an overlay manager can arrange to call a
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magic location in the inferior whenever there is an interesting
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change in overlay status. GDB can update its overlay tables
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and fiddle with breakpoints in overlays when this breakpoint
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is hit. */
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bp_overlay_event,
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/* Master copies of longjmp breakpoints. These are always installed
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as soon as an objfile containing longjmp is loaded, but they are
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always disabled. While necessary, temporary clones of bp_longjmp
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type will be created and enabled. */
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bp_longjmp_master,
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/* Master copies of std::terminate breakpoints. */
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bp_std_terminate_master,
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/* Like bp_longjmp_master, but for exceptions. */
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bp_exception_master,
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bp_catchpoint,
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bp_tracepoint,
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bp_fast_tracepoint,
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bp_static_tracepoint,
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/* A dynamic printf stops at the given location, does a formatted
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print, then automatically continues. (Although this is sort of
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like a macro packaging up standard breakpoint functionality,
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GDB doesn't have a way to construct types of breakpoint from
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elements of behavior.) */
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bp_dprintf,
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/* Event for JIT compiled code generation or deletion. */
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bp_jit_event,
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/* Breakpoint is placed at the STT_GNU_IFUNC resolver. When hit GDB
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inserts new bp_gnu_ifunc_resolver_return at the caller.
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bp_gnu_ifunc_resolver is still being kept here as a different thread
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may still hit it before bp_gnu_ifunc_resolver_return is hit by the
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original thread. */
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bp_gnu_ifunc_resolver,
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/* On its hit GDB now know the resolved address of the target
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STT_GNU_IFUNC function. Associated bp_gnu_ifunc_resolver can be
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deleted now and the breakpoint moved to the target function entry
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point. */
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bp_gnu_ifunc_resolver_return,
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};
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/* States of enablement of breakpoint. */
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enum enable_state
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{
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bp_disabled, /* The eventpoint is inactive, and cannot
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trigger. */
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bp_enabled, /* The eventpoint is active, and can
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trigger. */
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bp_call_disabled, /* The eventpoint has been disabled while a
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call into the inferior is "in flight",
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because some eventpoints interfere with
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the implementation of a call on some
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targets. The eventpoint will be
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automatically enabled and reset when the
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call "lands" (either completes, or stops
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at another eventpoint). */
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};
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/* Disposition of breakpoint. Ie: what to do after hitting it. */
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enum bpdisp
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{
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disp_del, /* Delete it */
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disp_del_at_next_stop, /* Delete at next stop,
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whether hit or not */
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disp_disable, /* Disable it */
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disp_donttouch /* Leave it alone */
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};
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/* Status of breakpoint conditions used when synchronizing
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conditions with the target. */
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enum condition_status
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{
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condition_unchanged = 0,
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condition_modified,
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condition_updated
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};
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/* Information used by targets to insert and remove breakpoints. */
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struct bp_target_info
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{
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/* Address space at which the breakpoint was placed. */
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struct address_space *placed_address_space;
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/* Address at which the breakpoint was placed. This is normally
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the same as REQUESTED_ADDRESS, except when adjustment happens in
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gdbarch_breakpoint_from_pc. The most common form of adjustment
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is stripping an alternate ISA marker from the PC which is used
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to determine the type of breakpoint to insert. */
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CORE_ADDR placed_address;
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/* Address at which the breakpoint was requested. */
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CORE_ADDR reqstd_address;
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/* If this is a ranged breakpoint, then this field contains the
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length of the range that will be watched for execution. */
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int length;
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/* If the breakpoint lives in memory and reading that memory would
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give back the breakpoint, instead of the original contents, then
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the original contents are cached here. Only SHADOW_LEN bytes of
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this buffer are valid, and only when the breakpoint is inserted. */
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gdb_byte shadow_contents[BREAKPOINT_MAX];
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/* The length of the data cached in SHADOW_CONTENTS. */
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int shadow_len;
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/* The breakpoint's kind. It is used in 'kind' parameter in Z
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packets. */
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int kind;
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/* Conditions the target should evaluate if it supports target-side
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breakpoint conditions. These are non-owning pointers. */
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std::vector<agent_expr *> conditions;
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/* Commands the target should evaluate if it supports target-side
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breakpoint commands. These are non-owning pointers. */
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std::vector<agent_expr *> tcommands;
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/* Flag that is true if the breakpoint should be left in place even
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when GDB is not connected. */
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int persist;
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};
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/* GDB maintains two types of information about each breakpoint (or
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watchpoint, or other related event). The first type corresponds
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to struct breakpoint; this is a relatively high-level structure
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which contains the source location(s), stopping conditions, user
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commands to execute when the breakpoint is hit, and so forth.
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The second type of information corresponds to struct bp_location.
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Each breakpoint has one or (eventually) more locations associated
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with it, which represent target-specific and machine-specific
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mechanisms for stopping the program. For instance, a watchpoint
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expression may require multiple hardware watchpoints in order to
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catch all changes in the value of the expression being watched. */
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enum bp_loc_type
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{
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bp_loc_software_breakpoint,
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bp_loc_hardware_breakpoint,
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bp_loc_hardware_watchpoint,
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bp_loc_other /* Miscellaneous... */
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};
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/* This structure is a collection of function pointers that, if
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available, will be called instead of performing the default action
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for this bp_loc_type. */
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struct bp_location_ops
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{
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/* Destructor. Releases everything from SELF (but not SELF
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itself). */
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void (*dtor) (struct bp_location *self);
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};
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class bp_location
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{
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public:
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bp_location () = default;
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bp_location (const bp_location_ops *ops, breakpoint *owner);
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/* Chain pointer to the next breakpoint location for
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the same parent breakpoint. */
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bp_location *next = NULL;
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/* Methods associated with this location. */
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const bp_location_ops *ops = NULL;
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/* The reference count. */
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int refc = 0;
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/* Type of this breakpoint location. */
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bp_loc_type loc_type {};
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/* Each breakpoint location must belong to exactly one higher-level
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breakpoint. This pointer is NULL iff this bp_location is no
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longer attached to a breakpoint. For example, when a breakpoint
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is deleted, its locations may still be found in the
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moribund_locations list, or if we had stopped for it, in
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bpstats. */
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breakpoint *owner = NULL;
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/* Conditional. Break only if this expression's value is nonzero.
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Unlike string form of condition, which is associated with
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breakpoint, this is associated with location, since if breakpoint
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has several locations, the evaluation of expression can be
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different for different locations. Only valid for real
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breakpoints; a watchpoint's conditional expression is stored in
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the owner breakpoint object. */
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expression_up cond;
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/* Conditional expression in agent expression
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bytecode form. This is used for stub-side breakpoint
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condition evaluation. */
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agent_expr_up cond_bytecode;
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/* Signals that the condition has changed since the last time
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we updated the global location list. This means the condition
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needs to be sent to the target again. This is used together
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with target-side breakpoint conditions.
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condition_unchanged: It means there has been no condition changes.
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condition_modified: It means this location had its condition modified.
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condition_updated: It means we already marked all the locations that are
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duplicates of this location and thus we don't need to call
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force_breakpoint_reinsertion (...) for this location. */
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condition_status condition_changed {};
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agent_expr_up cmd_bytecode;
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/* Signals that breakpoint conditions and/or commands need to be
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re-synched with the target. This has no use other than
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target-side breakpoints. */
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bool needs_update = false;
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/* This location's address is in an unloaded solib, and so this
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location should not be inserted. It will be automatically
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enabled when that solib is loaded. */
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bool shlib_disabled = false;
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/* Is this particular location enabled. */
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bool enabled = false;
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/* Nonzero if this breakpoint is now inserted. */
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bool inserted = false;
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/* Nonzero if this is a permanent breakpoint. There is a breakpoint
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instruction hard-wired into the target's code. Don't try to
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write another breakpoint instruction on top of it, or restore its
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value. Step over it using the architecture's
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gdbarch_skip_permanent_breakpoint method. */
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bool permanent = false;
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/* Nonzero if this is not the first breakpoint in the list
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for the given address. location of tracepoint can _never_
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be duplicated with other locations of tracepoints and other
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kinds of breakpoints, because two locations at the same
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address may have different actions, so both of these locations
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should be downloaded and so that `tfind N' always works. */
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bool duplicate = false;
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/* If we someday support real thread-specific breakpoints, then
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the breakpoint location will need a thread identifier. */
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/* Data for specific breakpoint types. These could be a union, but
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simplicity is more important than memory usage for breakpoints. */
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/* Architecture associated with this location's address. May be
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different from the breakpoint architecture. */
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struct gdbarch *gdbarch = NULL;
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/* The program space associated with this breakpoint location
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address. Note that an address space may be represented in more
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than one program space (e.g. each uClinux program will be given
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its own program space, but there will only be one address space
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for all of them), but we must not insert more than one location
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at the same address in the same address space. */
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program_space *pspace = NULL;
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/* Note that zero is a perfectly valid code address on some platforms
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(for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
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is not a special value for this field. Valid for all types except
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bp_loc_other. */
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CORE_ADDR address = 0;
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/* For hardware watchpoints, the size of the memory region being
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watched. For hardware ranged breakpoints, the size of the
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breakpoint range. */
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int length = 0;
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/* Type of hardware watchpoint. */
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target_hw_bp_type watchpoint_type {};
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/* For any breakpoint type with an address, this is the section
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associated with the address. Used primarily for overlay
|
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debugging. */
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obj_section *section = NULL;
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||
/* Address at which breakpoint was requested, either by the user or
|
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by GDB for internal breakpoints. This will usually be the same
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as ``address'' (above) except for cases in which
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ADJUST_BREAKPOINT_ADDRESS has computed a different address at
|
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which to place the breakpoint in order to comply with a
|
||
processor's architectual constraints. */
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CORE_ADDR requested_address = 0;
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/* An additional address assigned with this location. This is currently
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only used by STT_GNU_IFUNC resolver breakpoints to hold the address
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||
of the resolver function. */
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||
CORE_ADDR related_address = 0;
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||
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||
/* If the location comes from a probe point, this is the probe associated
|
||
with it. */
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||
bound_probe probe {};
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||
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char *function_name = NULL;
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||
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||
/* Details of the placed breakpoint, when inserted. */
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bp_target_info target_info {};
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|
||
/* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
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bp_target_info overlay_target_info {};
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||
|
||
/* In a non-stop mode, it's possible that we delete a breakpoint,
|
||
but as we do that, some still running thread hits that breakpoint.
|
||
For that reason, we need to keep locations belonging to deleted
|
||
breakpoints for a bit, so that don't report unexpected SIGTRAP.
|
||
We can't keep such locations forever, so we use a heuristic --
|
||
after we process certain number of inferior events since
|
||
breakpoint was deleted, we retire all locations of that breakpoint.
|
||
This variable keeps a number of events still to go, when
|
||
it becomes 0 this location is retired. */
|
||
int events_till_retirement = 0;
|
||
|
||
/* Line number which was used to place this location.
|
||
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||
Breakpoint placed into a comment keeps it's user specified line number
|
||
despite ADDRESS resolves into a different line number. */
|
||
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||
int line_number = 0;
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||
|
||
/* Symtab which was used to place this location. This is used
|
||
to find the corresponding source file name. */
|
||
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||
struct symtab *symtab = NULL;
|
||
};
|
||
|
||
/* The possible return values for print_bpstat, print_it_normal,
|
||
print_it_done, print_it_noop. */
|
||
enum print_stop_action
|
||
{
|
||
/* We printed nothing or we need to do some more analysis. */
|
||
PRINT_UNKNOWN = -1,
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||
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||
/* We printed something, and we *do* desire that something to be
|
||
followed by a location. */
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||
PRINT_SRC_AND_LOC,
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||
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||
/* We printed something, and we do *not* desire that something to be
|
||
followed by a location. */
|
||
PRINT_SRC_ONLY,
|
||
|
||
/* We already printed all we needed to print, don't print anything
|
||
else. */
|
||
PRINT_NOTHING
|
||
};
|
||
|
||
/* This structure is a collection of function pointers that, if available,
|
||
will be called instead of the performing the default action for this
|
||
bptype. */
|
||
|
||
struct breakpoint_ops
|
||
{
|
||
/* Allocate a location for this breakpoint. */
|
||
struct bp_location * (*allocate_location) (struct breakpoint *);
|
||
|
||
/* Reevaluate a breakpoint. This is necessary after symbols change
|
||
(e.g., an executable or DSO was loaded, or the inferior just
|
||
started). */
|
||
void (*re_set) (struct breakpoint *self);
|
||
|
||
/* Insert the breakpoint or watchpoint or activate the catchpoint.
|
||
Return 0 for success, 1 if the breakpoint, watchpoint or
|
||
catchpoint type is not supported, -1 for failure. */
|
||
int (*insert_location) (struct bp_location *);
|
||
|
||
/* Remove the breakpoint/catchpoint that was previously inserted
|
||
with the "insert" method above. Return 0 for success, 1 if the
|
||
breakpoint, watchpoint or catchpoint type is not supported,
|
||
-1 for failure. */
|
||
int (*remove_location) (struct bp_location *, enum remove_bp_reason reason);
|
||
|
||
/* Return true if it the target has stopped due to hitting
|
||
breakpoint location BL. This function does not check if we
|
||
should stop, only if BL explains the stop. ASPACE is the address
|
||
space in which the event occurred, BP_ADDR is the address at
|
||
which the inferior stopped, and WS is the target_waitstatus
|
||
describing the event. */
|
||
int (*breakpoint_hit) (const struct bp_location *bl,
|
||
struct address_space *aspace,
|
||
CORE_ADDR bp_addr,
|
||
const struct target_waitstatus *ws);
|
||
|
||
/* Check internal conditions of the breakpoint referred to by BS.
|
||
If we should not stop for this breakpoint, set BS->stop to 0. */
|
||
void (*check_status) (struct bpstats *bs);
|
||
|
||
/* Tell how many hardware resources (debug registers) are needed
|
||
for this breakpoint. If this function is not provided, then
|
||
the breakpoint or watchpoint needs one debug register. */
|
||
int (*resources_needed) (const struct bp_location *);
|
||
|
||
/* Tell whether we can downgrade from a hardware watchpoint to a software
|
||
one. If not, the user will not be able to enable the watchpoint when
|
||
there are not enough hardware resources available. */
|
||
int (*works_in_software_mode) (const struct breakpoint *);
|
||
|
||
/* The normal print routine for this breakpoint, called when we
|
||
hit it. */
|
||
enum print_stop_action (*print_it) (struct bpstats *bs);
|
||
|
||
/* Display information about this breakpoint, for "info
|
||
breakpoints". */
|
||
void (*print_one) (struct breakpoint *, struct bp_location **);
|
||
|
||
/* Display extra information about this breakpoint, below the normal
|
||
breakpoint description in "info breakpoints".
|
||
|
||
In the example below, the "address range" line was printed
|
||
by print_one_detail_ranged_breakpoint.
|
||
|
||
(gdb) info breakpoints
|
||
Num Type Disp Enb Address What
|
||
2 hw breakpoint keep y in main at test-watch.c:70
|
||
address range: [0x10000458, 0x100004c7]
|
||
|
||
*/
|
||
void (*print_one_detail) (const struct breakpoint *, struct ui_out *);
|
||
|
||
/* Display information about this breakpoint after setting it
|
||
(roughly speaking; this is called from "mention"). */
|
||
void (*print_mention) (struct breakpoint *);
|
||
|
||
/* Print to FP the CLI command that recreates this breakpoint. */
|
||
void (*print_recreate) (struct breakpoint *, struct ui_file *fp);
|
||
|
||
/* Create SALs from location, storing the result in linespec_result.
|
||
|
||
For an explanation about the arguments, see the function
|
||
`create_sals_from_location_default'.
|
||
|
||
This function is called inside `create_breakpoint'. */
|
||
void (*create_sals_from_location) (const struct event_location *location,
|
||
struct linespec_result *canonical,
|
||
enum bptype type_wanted);
|
||
|
||
/* This method will be responsible for creating a breakpoint given its SALs.
|
||
Usually, it just calls `create_breakpoints_sal' (for ordinary
|
||
breakpoints). However, there may be some special cases where we might
|
||
need to do some tweaks, e.g., see
|
||
`strace_marker_create_breakpoints_sal'.
|
||
|
||
This function is called inside `create_breakpoint'. */
|
||
void (*create_breakpoints_sal) (struct gdbarch *,
|
||
struct linespec_result *,
|
||
char *, char *,
|
||
enum bptype, enum bpdisp, int, int,
|
||
int, const struct breakpoint_ops *,
|
||
int, int, int, unsigned);
|
||
|
||
/* Given the location (second parameter), this method decodes it and
|
||
provides the SAL locations related to it. For ordinary
|
||
breakpoints, it calls `decode_line_full'. If SEARCH_PSPACE is
|
||
not NULL, symbol search is restricted to just that program space.
|
||
|
||
This function is called inside `location_to_sals'. */
|
||
void (*decode_location) (struct breakpoint *b,
|
||
const struct event_location *location,
|
||
struct program_space *search_pspace,
|
||
struct symtabs_and_lines *sals);
|
||
|
||
/* Return true if this breakpoint explains a signal. See
|
||
bpstat_explains_signal. */
|
||
int (*explains_signal) (struct breakpoint *, enum gdb_signal);
|
||
|
||
/* Called after evaluating the breakpoint's condition,
|
||
and only if it evaluated true. */
|
||
void (*after_condition_true) (struct bpstats *bs);
|
||
};
|
||
|
||
/* Helper for breakpoint_ops->print_recreate implementations. Prints
|
||
the "thread" or "task" condition of B, and then a newline.
|
||
|
||
Necessary because most breakpoint implementations accept
|
||
thread/task conditions at the end of the spec line, like "break foo
|
||
thread 1", which needs outputting before any breakpoint-type
|
||
specific extra command necessary for B's recreation. */
|
||
extern void print_recreate_thread (struct breakpoint *b, struct ui_file *fp);
|
||
|
||
enum watchpoint_triggered
|
||
{
|
||
/* This watchpoint definitely did not trigger. */
|
||
watch_triggered_no = 0,
|
||
|
||
/* Some hardware watchpoint triggered, and it might have been this
|
||
one, but we do not know which it was. */
|
||
watch_triggered_unknown,
|
||
|
||
/* This hardware watchpoint definitely did trigger. */
|
||
watch_triggered_yes
|
||
};
|
||
|
||
typedef struct bp_location *bp_location_p;
|
||
DEF_VEC_P(bp_location_p);
|
||
|
||
/* A reference-counted struct command_line. This lets multiple
|
||
breakpoints share a single command list. This is an implementation
|
||
detail to the breakpoints module. */
|
||
struct counted_command_line;
|
||
|
||
/* Some targets (e.g., embedded PowerPC) need two debug registers to set
|
||
a watchpoint over a memory region. If this flag is true, GDB will use
|
||
only one register per watchpoint, thus assuming that all acesses that
|
||
modify a memory location happen at its starting address. */
|
||
|
||
extern int target_exact_watchpoints;
|
||
|
||
/* Note that the ->silent field is not currently used by any commands
|
||
(though the code is in there if it was to be, and set_raw_breakpoint
|
||
does set it to 0). I implemented it because I thought it would be
|
||
useful for a hack I had to put in; I'm going to leave it in because
|
||
I can see how there might be times when it would indeed be useful */
|
||
|
||
/* This is for all kinds of breakpoints. */
|
||
|
||
struct breakpoint
|
||
{
|
||
virtual ~breakpoint ();
|
||
|
||
/* Methods associated with this breakpoint. */
|
||
const breakpoint_ops *ops = NULL;
|
||
|
||
breakpoint *next = NULL;
|
||
/* Type of breakpoint. */
|
||
bptype type = bp_none;
|
||
/* Zero means disabled; remember the info but don't break here. */
|
||
enum enable_state enable_state = bp_enabled;
|
||
/* What to do with this breakpoint after we hit it. */
|
||
bpdisp disposition = disp_del;
|
||
/* Number assigned to distinguish breakpoints. */
|
||
int number = 0;
|
||
|
||
/* Location(s) associated with this high-level breakpoint. */
|
||
bp_location *loc = NULL;
|
||
|
||
/* True means a silent breakpoint (don't print frame info if we stop
|
||
here). */
|
||
bool silent = false;
|
||
/* True means display ADDR_STRING to the user verbatim. */
|
||
bool display_canonical = false;
|
||
/* Number of stops at this breakpoint that should be continued
|
||
automatically before really stopping. */
|
||
int ignore_count = 0;
|
||
|
||
/* Number of stops at this breakpoint before it will be
|
||
disabled. */
|
||
int enable_count = 0;
|
||
|
||
/* Chain of command lines to execute when this breakpoint is
|
||
hit. */
|
||
counted_command_line *commands = NULL;
|
||
/* Stack depth (address of frame). If nonzero, break only if fp
|
||
equals this. */
|
||
struct frame_id frame_id = null_frame_id;
|
||
|
||
/* The program space used to set the breakpoint. This is only set
|
||
for breakpoints which are specific to a program space; for
|
||
non-thread-specific ordinary breakpoints this is NULL. */
|
||
program_space *pspace = NULL;
|
||
|
||
/* Location we used to set the breakpoint. */
|
||
event_location_up location;
|
||
|
||
/* The filter that should be passed to decode_line_full when
|
||
re-setting this breakpoint. This may be NULL, but otherwise is
|
||
allocated with xmalloc. */
|
||
char *filter = NULL;
|
||
|
||
/* For a ranged breakpoint, the location we used to find the end of
|
||
the range. */
|
||
event_location_up location_range_end;
|
||
|
||
/* Architecture we used to set the breakpoint. */
|
||
struct gdbarch *gdbarch = NULL;
|
||
/* Language we used to set the breakpoint. */
|
||
enum language language = language_unknown;
|
||
/* Input radix we used to set the breakpoint. */
|
||
int input_radix = 0;
|
||
/* String form of the breakpoint condition (malloc'd), or NULL if
|
||
there is no condition. */
|
||
char *cond_string = NULL;
|
||
|
||
/* String form of extra parameters, or NULL if there are none.
|
||
Malloc'd. */
|
||
char *extra_string = NULL;
|
||
|
||
/* Holds the address of the related watchpoint_scope breakpoint when
|
||
using watchpoints on local variables (might the concept of a
|
||
related breakpoint be useful elsewhere, if not just call it the
|
||
watchpoint_scope breakpoint or something like that. FIXME). */
|
||
breakpoint *related_breakpoint = NULL;
|
||
|
||
/* Thread number for thread-specific breakpoint, or -1 if don't
|
||
care. */
|
||
int thread = -1;
|
||
|
||
/* Ada task number for task-specific breakpoint, or 0 if don't
|
||
care. */
|
||
int task = 0;
|
||
|
||
/* Count of the number of times this breakpoint was taken, dumped
|
||
with the info, but not used for anything else. Useful for seeing
|
||
how many times you hit a break prior to the program aborting, so
|
||
you can back up to just before the abort. */
|
||
int hit_count = 0;
|
||
|
||
/* Is breakpoint's condition not yet parsed because we found no
|
||
location initially so had no context to parse the condition
|
||
in. */
|
||
int condition_not_parsed = 0;
|
||
|
||
/* With a Python scripting enabled GDB, store a reference to the
|
||
Python object that has been associated with this breakpoint.
|
||
This is always NULL for a GDB that is not script enabled. It can
|
||
sometimes be NULL for enabled GDBs as not all breakpoint types
|
||
are tracked by the scripting language API. */
|
||
gdbpy_breakpoint_object *py_bp_object = NULL;
|
||
|
||
/* Same as py_bp_object, but for Scheme. */
|
||
gdbscm_breakpoint_object *scm_bp_object = NULL;
|
||
};
|
||
|
||
/* An instance of this type is used to represent a watchpoint. */
|
||
|
||
struct watchpoint : public breakpoint
|
||
{
|
||
~watchpoint () override;
|
||
|
||
/* String form of exp to use for displaying to the user (malloc'd),
|
||
or NULL if none. */
|
||
char *exp_string;
|
||
/* String form to use for reparsing of EXP (malloc'd) or NULL. */
|
||
char *exp_string_reparse;
|
||
|
||
/* The expression we are watching, or NULL if not a watchpoint. */
|
||
expression_up exp;
|
||
/* The largest block within which it is valid, or NULL if it is
|
||
valid anywhere (e.g. consists just of global symbols). */
|
||
const struct block *exp_valid_block;
|
||
/* The conditional expression if any. */
|
||
expression_up cond_exp;
|
||
/* The largest block within which it is valid, or NULL if it is
|
||
valid anywhere (e.g. consists just of global symbols). */
|
||
const struct block *cond_exp_valid_block;
|
||
/* Value of the watchpoint the last time we checked it, or NULL when
|
||
we do not know the value yet or the value was not readable. VAL
|
||
is never lazy. */
|
||
struct value *val;
|
||
/* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
|
||
then an error occurred reading the value. */
|
||
int val_valid;
|
||
|
||
/* When watching the location of a bitfield, contains the offset and size of
|
||
the bitfield. Otherwise contains 0. */
|
||
int val_bitpos;
|
||
int val_bitsize;
|
||
|
||
/* Holds the frame address which identifies the frame this
|
||
watchpoint should be evaluated in, or `null' if the watchpoint
|
||
should be evaluated on the outermost frame. */
|
||
struct frame_id watchpoint_frame;
|
||
|
||
/* Holds the thread which identifies the frame this watchpoint
|
||
should be considered in scope for, or `null_ptid' if the
|
||
watchpoint should be evaluated in all threads. */
|
||
ptid_t watchpoint_thread;
|
||
|
||
/* For hardware watchpoints, the triggered status according to the
|
||
hardware. */
|
||
enum watchpoint_triggered watchpoint_triggered;
|
||
|
||
/* Whether this watchpoint is exact (see
|
||
target_exact_watchpoints). */
|
||
int exact;
|
||
|
||
/* The mask address for a masked hardware watchpoint. */
|
||
CORE_ADDR hw_wp_mask;
|
||
};
|
||
|
||
/* Given a function FUNC (struct breakpoint *B, void *DATA) and
|
||
USER_DATA, call FUNC for every known breakpoint passing USER_DATA
|
||
as argument.
|
||
|
||
If FUNC returns 1, the loop stops and the current
|
||
'struct breakpoint' being processed is returned. If FUNC returns
|
||
zero, the loop continues.
|
||
|
||
This function returns either a 'struct breakpoint' pointer or NULL.
|
||
It was based on BFD's bfd_sections_find_if function. */
|
||
|
||
extern struct breakpoint *breakpoint_find_if
|
||
(int (*func) (struct breakpoint *b, void *d), void *user_data);
|
||
|
||
/* Return true if BPT is either a software breakpoint or a hardware
|
||
breakpoint. */
|
||
|
||
extern int is_breakpoint (const struct breakpoint *bpt);
|
||
|
||
/* Returns true if BPT is really a watchpoint. */
|
||
|
||
extern int is_watchpoint (const struct breakpoint *bpt);
|
||
|
||
/* An instance of this type is used to represent all kinds of
|
||
tracepoints. */
|
||
|
||
struct tracepoint : public breakpoint
|
||
{
|
||
/* Number of times this tracepoint should single-step and collect
|
||
additional data. */
|
||
long step_count;
|
||
|
||
/* Number of times this tracepoint should be hit before
|
||
disabling/ending. */
|
||
int pass_count;
|
||
|
||
/* The number of the tracepoint on the target. */
|
||
int number_on_target;
|
||
|
||
/* The total space taken by all the trace frames for this
|
||
tracepoint. */
|
||
ULONGEST traceframe_usage;
|
||
|
||
/* The static tracepoint marker id, if known. */
|
||
char *static_trace_marker_id;
|
||
|
||
/* LTTng/UST allow more than one marker with the same ID string,
|
||
although it unadvised because it confuses tools. When setting
|
||
static tracepoints by marker ID, this will record the index in
|
||
the array of markers we found for the given marker ID for which
|
||
this static tracepoint corresponds. When resetting breakpoints,
|
||
we will use this index to try to find the same marker again. */
|
||
int static_trace_marker_id_idx;
|
||
};
|
||
|
||
typedef struct breakpoint *breakpoint_p;
|
||
DEF_VEC_P(breakpoint_p);
|
||
|
||
/* The following stuff is an abstract data type "bpstat" ("breakpoint
|
||
status"). This provides the ability to determine whether we have
|
||
stopped at a breakpoint, and what we should do about it. */
|
||
|
||
typedef struct bpstats *bpstat;
|
||
|
||
/* Clears a chain of bpstat, freeing storage
|
||
of each. */
|
||
extern void bpstat_clear (bpstat *);
|
||
|
||
/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
|
||
is part of the bpstat is copied as well. */
|
||
extern bpstat bpstat_copy (bpstat);
|
||
|
||
extern bpstat bpstat_stop_status (struct address_space *aspace,
|
||
CORE_ADDR pc, ptid_t ptid,
|
||
const struct target_waitstatus *ws);
|
||
|
||
/* This bpstat_what stuff tells wait_for_inferior what to do with a
|
||
breakpoint (a challenging task).
|
||
|
||
The enum values order defines priority-like order of the actions.
|
||
Once you've decided that some action is appropriate, you'll never
|
||
go back and decide something of a lower priority is better. Each
|
||
of these actions is mutually exclusive with the others. That
|
||
means, that if you find yourself adding a new action class here and
|
||
wanting to tell GDB that you have two simultaneous actions to
|
||
handle, something is wrong, and you probably don't actually need a
|
||
new action type.
|
||
|
||
Note that a step resume breakpoint overrides another breakpoint of
|
||
signal handling (see comment in wait_for_inferior at where we set
|
||
the step_resume breakpoint). */
|
||
|
||
enum bpstat_what_main_action
|
||
{
|
||
/* Perform various other tests; that is, this bpstat does not
|
||
say to perform any action (e.g. failed watchpoint and nothing
|
||
else). */
|
||
BPSTAT_WHAT_KEEP_CHECKING,
|
||
|
||
/* Remove breakpoints, single step once, then put them back in and
|
||
go back to what we were doing. It's possible that this should
|
||
be removed from the main_action and put into a separate field,
|
||
to more cleanly handle
|
||
BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
|
||
BPSTAT_WHAT_SINGLE,
|
||
|
||
/* Set longjmp_resume breakpoint, remove all other breakpoints,
|
||
and continue. The "remove all other breakpoints" part is
|
||
required if we are also stepping over another breakpoint as
|
||
well as doing the longjmp handling. */
|
||
BPSTAT_WHAT_SET_LONGJMP_RESUME,
|
||
|
||
/* Clear longjmp_resume breakpoint, then handle as
|
||
BPSTAT_WHAT_KEEP_CHECKING. */
|
||
BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
|
||
|
||
/* Clear step resume breakpoint, and keep checking. */
|
||
BPSTAT_WHAT_STEP_RESUME,
|
||
|
||
/* Rather than distinguish between noisy and silent stops here, it
|
||
might be cleaner to have bpstat_print make that decision (also
|
||
taking into account stop_print_frame and source_only). But the
|
||
implications are a bit scary (interaction with auto-displays,
|
||
etc.), so I won't try it. */
|
||
|
||
/* Stop silently. */
|
||
BPSTAT_WHAT_STOP_SILENT,
|
||
|
||
/* Stop and print. */
|
||
BPSTAT_WHAT_STOP_NOISY,
|
||
|
||
/* Clear step resume breakpoint, and keep checking. High-priority
|
||
step-resume breakpoints are used when even if there's a user
|
||
breakpoint at the current PC when we set the step-resume
|
||
breakpoint, we don't want to re-handle any breakpoint other
|
||
than the step-resume when it's hit; instead we want to move
|
||
past the breakpoint. This is used in the case of skipping
|
||
signal handlers. */
|
||
BPSTAT_WHAT_HP_STEP_RESUME,
|
||
};
|
||
|
||
/* An enum indicating the kind of "stack dummy" stop. This is a bit
|
||
of a misnomer because only one kind of truly a stack dummy. */
|
||
enum stop_stack_kind
|
||
{
|
||
/* We didn't stop at a stack dummy breakpoint. */
|
||
STOP_NONE = 0,
|
||
|
||
/* Stopped at a stack dummy. */
|
||
STOP_STACK_DUMMY,
|
||
|
||
/* Stopped at std::terminate. */
|
||
STOP_STD_TERMINATE
|
||
};
|
||
|
||
struct bpstat_what
|
||
{
|
||
enum bpstat_what_main_action main_action;
|
||
|
||
/* Did we hit a call dummy breakpoint? This only goes with a
|
||
main_action of BPSTAT_WHAT_STOP_SILENT or
|
||
BPSTAT_WHAT_STOP_NOISY (the concept of continuing from a call
|
||
dummy without popping the frame is not a useful one). */
|
||
enum stop_stack_kind call_dummy;
|
||
|
||
/* Used for BPSTAT_WHAT_SET_LONGJMP_RESUME and
|
||
BPSTAT_WHAT_CLEAR_LONGJMP_RESUME. True if we are handling a
|
||
longjmp, false if we are handling an exception. */
|
||
int is_longjmp;
|
||
};
|
||
|
||
/* Tell what to do about this bpstat. */
|
||
struct bpstat_what bpstat_what (bpstat);
|
||
|
||
/* Run breakpoint event callbacks associated with the breakpoints that
|
||
triggered. */
|
||
extern void bpstat_run_callbacks (bpstat bs_head);
|
||
|
||
/* Find the bpstat associated with a breakpoint. NULL otherwise. */
|
||
bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *);
|
||
|
||
/* Nonzero if a signal that we got in target_wait() was due to
|
||
circumstances explained by the bpstat; the signal is therefore not
|
||
random. */
|
||
extern int bpstat_explains_signal (bpstat, enum gdb_signal);
|
||
|
||
/* Nonzero is this bpstat causes a stop. */
|
||
extern int bpstat_causes_stop (bpstat);
|
||
|
||
/* Nonzero if we should step constantly (e.g. watchpoints on machines
|
||
without hardware support). This isn't related to a specific bpstat,
|
||
just to things like whether watchpoints are set. */
|
||
extern int bpstat_should_step (void);
|
||
|
||
/* Print a message indicating what happened. Returns nonzero to
|
||
say that only the source line should be printed after this (zero
|
||
return means print the frame as well as the source line). */
|
||
extern enum print_stop_action bpstat_print (bpstat, int);
|
||
|
||
/* Put in *NUM the breakpoint number of the first breakpoint we are
|
||
stopped at. *BSP upon return is a bpstat which points to the
|
||
remaining breakpoints stopped at (but which is not guaranteed to be
|
||
good for anything but further calls to bpstat_num).
|
||
|
||
Return 0 if passed a bpstat which does not indicate any breakpoints.
|
||
Return -1 if stopped at a breakpoint that has been deleted since
|
||
we set it.
|
||
Return 1 otherwise. */
|
||
extern int bpstat_num (bpstat *, int *);
|
||
|
||
/* Perform actions associated with the stopped inferior. Actually, we
|
||
just use this for breakpoint commands. Perhaps other actions will
|
||
go here later, but this is executed at a late time (from the
|
||
command loop). */
|
||
extern void bpstat_do_actions (void);
|
||
|
||
/* Modify all entries of STOP_BPSTAT of INFERIOR_PTID so that the actions will
|
||
not be performed. */
|
||
extern void bpstat_clear_actions (void);
|
||
|
||
/* Implementation: */
|
||
|
||
/* Values used to tell the printing routine how to behave for this
|
||
bpstat. */
|
||
enum bp_print_how
|
||
{
|
||
/* This is used when we want to do a normal printing of the reason
|
||
for stopping. The output will depend on the type of eventpoint
|
||
we are dealing with. This is the default value, most commonly
|
||
used. */
|
||
print_it_normal,
|
||
/* This is used when nothing should be printed for this bpstat
|
||
entry. */
|
||
print_it_noop,
|
||
/* This is used when everything which needs to be printed has
|
||
already been printed. But we still want to print the frame. */
|
||
print_it_done
|
||
};
|
||
|
||
struct bpstats
|
||
{
|
||
/* Linked list because there can be more than one breakpoint at
|
||
the same place, and a bpstat reflects the fact that all have
|
||
been hit. */
|
||
bpstat next;
|
||
|
||
/* Location that caused the stop. Locations are refcounted, so
|
||
this will never be NULL. Note that this location may end up
|
||
detached from a breakpoint, but that does not necessary mean
|
||
that the struct breakpoint is gone. E.g., consider a
|
||
watchpoint with a condition that involves an inferior function
|
||
call. Watchpoint locations are recreated often (on resumes,
|
||
hence on infcalls too). Between creating the bpstat and after
|
||
evaluating the watchpoint condition, this location may hence
|
||
end up detached from its original owner watchpoint, even though
|
||
the watchpoint is still listed. If it's condition evaluates as
|
||
true, we still want this location to cause a stop, and we will
|
||
still need to know which watchpoint it was originally attached.
|
||
What this means is that we should not (in most cases) follow
|
||
the `bpstat->bp_location->owner' link, but instead use the
|
||
`breakpoint_at' field below. */
|
||
struct bp_location *bp_location_at;
|
||
|
||
/* Breakpoint that caused the stop. This is nullified if the
|
||
breakpoint ends up being deleted. See comments on
|
||
`bp_location_at' above for why do we need this field instead of
|
||
following the location's owner. */
|
||
struct breakpoint *breakpoint_at;
|
||
|
||
/* The associated command list. */
|
||
struct counted_command_line *commands;
|
||
|
||
/* Old value associated with a watchpoint. */
|
||
struct value *old_val;
|
||
|
||
/* Nonzero if this breakpoint tells us to print the frame. */
|
||
char print;
|
||
|
||
/* Nonzero if this breakpoint tells us to stop. */
|
||
char stop;
|
||
|
||
/* Tell bpstat_print and print_bp_stop_message how to print stuff
|
||
associated with this element of the bpstat chain. */
|
||
enum bp_print_how print_it;
|
||
};
|
||
|
||
enum inf_context
|
||
{
|
||
inf_starting,
|
||
inf_running,
|
||
inf_exited,
|
||
inf_execd
|
||
};
|
||
|
||
/* The possible return values for breakpoint_here_p.
|
||
We guarantee that zero always means "no breakpoint here". */
|
||
enum breakpoint_here
|
||
{
|
||
no_breakpoint_here = 0,
|
||
ordinary_breakpoint_here,
|
||
permanent_breakpoint_here
|
||
};
|
||
|
||
|
||
/* Prototypes for breakpoint-related functions. */
|
||
|
||
/* Return 1 if there's a program/permanent breakpoint planted in
|
||
memory at ADDRESS, return 0 otherwise. */
|
||
|
||
extern int program_breakpoint_here_p (struct gdbarch *gdbarch, CORE_ADDR address);
|
||
|
||
extern enum breakpoint_here breakpoint_here_p (struct address_space *,
|
||
CORE_ADDR);
|
||
|
||
/* Return true if an enabled breakpoint exists in the range defined by
|
||
ADDR and LEN, in ASPACE. */
|
||
extern int breakpoint_in_range_p (struct address_space *aspace,
|
||
CORE_ADDR addr, ULONGEST len);
|
||
|
||
extern int moribund_breakpoint_here_p (struct address_space *, CORE_ADDR);
|
||
|
||
extern int breakpoint_inserted_here_p (struct address_space *, CORE_ADDR);
|
||
|
||
extern int regular_breakpoint_inserted_here_p (struct address_space *,
|
||
CORE_ADDR);
|
||
|
||
extern int software_breakpoint_inserted_here_p (struct address_space *,
|
||
CORE_ADDR);
|
||
|
||
/* Return non-zero iff there is a hardware breakpoint inserted at
|
||
PC. */
|
||
extern int hardware_breakpoint_inserted_here_p (struct address_space *,
|
||
CORE_ADDR);
|
||
|
||
/* Check whether any location of BP is inserted at PC. */
|
||
|
||
extern int breakpoint_has_location_inserted_here (struct breakpoint *bp,
|
||
struct address_space *aspace,
|
||
CORE_ADDR pc);
|
||
|
||
extern int single_step_breakpoint_inserted_here_p (struct address_space *,
|
||
CORE_ADDR);
|
||
|
||
/* Returns true if there's a hardware watchpoint or access watchpoint
|
||
inserted in the range defined by ADDR and LEN. */
|
||
extern int hardware_watchpoint_inserted_in_range (struct address_space *,
|
||
CORE_ADDR addr,
|
||
ULONGEST len);
|
||
|
||
/* Returns true if {ASPACE1,ADDR1} and {ASPACE2,ADDR2} represent the
|
||
same breakpoint location. In most targets, this can only be true
|
||
if ASPACE1 matches ASPACE2. On targets that have global
|
||
breakpoints, the address space doesn't really matter. */
|
||
|
||
extern int breakpoint_address_match (struct address_space *aspace1,
|
||
CORE_ADDR addr1,
|
||
struct address_space *aspace2,
|
||
CORE_ADDR addr2);
|
||
|
||
extern void until_break_command (char *, int, int);
|
||
|
||
/* Initialize a struct bp_location. */
|
||
|
||
extern void update_breakpoint_locations (struct breakpoint *b,
|
||
struct program_space *filter_pspace,
|
||
struct symtabs_and_lines sals,
|
||
struct symtabs_and_lines sals_end);
|
||
|
||
extern void breakpoint_re_set (void);
|
||
|
||
extern void breakpoint_re_set_thread (struct breakpoint *);
|
||
|
||
extern struct breakpoint *set_momentary_breakpoint
|
||
(struct gdbarch *, struct symtab_and_line, struct frame_id, enum bptype);
|
||
|
||
extern struct breakpoint *set_momentary_breakpoint_at_pc
|
||
(struct gdbarch *, CORE_ADDR pc, enum bptype type);
|
||
|
||
extern struct breakpoint *clone_momentary_breakpoint (struct breakpoint *bpkt);
|
||
|
||
extern void set_ignore_count (int, int, int);
|
||
|
||
extern void breakpoint_init_inferior (enum inf_context);
|
||
|
||
extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *);
|
||
|
||
extern void delete_breakpoint (struct breakpoint *);
|
||
|
||
extern void breakpoint_auto_delete (bpstat);
|
||
|
||
typedef void (*walk_bp_location_callback) (struct bp_location *, void *);
|
||
|
||
extern void iterate_over_bp_locations (walk_bp_location_callback);
|
||
|
||
/* Return the chain of command lines to execute when this breakpoint
|
||
is hit. */
|
||
extern struct command_line *breakpoint_commands (struct breakpoint *b);
|
||
|
||
/* Return a string image of DISP. The string is static, and thus should
|
||
NOT be deallocated after use. */
|
||
const char *bpdisp_text (enum bpdisp disp);
|
||
|
||
extern void break_command (char *, int);
|
||
|
||
extern void hbreak_command_wrapper (char *, int);
|
||
extern void thbreak_command_wrapper (char *, int);
|
||
extern void rbreak_command_wrapper (char *, int);
|
||
extern void watch_command_wrapper (char *, int, int);
|
||
extern void awatch_command_wrapper (char *, int, int);
|
||
extern void rwatch_command_wrapper (char *, int, int);
|
||
extern void tbreak_command (char *, int);
|
||
|
||
extern struct breakpoint_ops base_breakpoint_ops;
|
||
extern struct breakpoint_ops bkpt_breakpoint_ops;
|
||
extern struct breakpoint_ops tracepoint_breakpoint_ops;
|
||
extern struct breakpoint_ops dprintf_breakpoint_ops;
|
||
|
||
extern void initialize_breakpoint_ops (void);
|
||
|
||
/* Arguments to pass as context to some catch command handlers. */
|
||
#define CATCH_PERMANENT ((void *) (uintptr_t) 0)
|
||
#define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
|
||
|
||
/* Like add_cmd, but add the command to both the "catch" and "tcatch"
|
||
lists, and pass some additional user data to the command
|
||
function. */
|
||
|
||
extern void
|
||
add_catch_command (const char *name, const char *docstring,
|
||
cmd_sfunc_ftype *sfunc,
|
||
completer_ftype *completer,
|
||
void *user_data_catch,
|
||
void *user_data_tcatch);
|
||
|
||
/* Initialize a breakpoint struct for Ada exception catchpoints. */
|
||
|
||
extern void
|
||
init_ada_exception_breakpoint (struct breakpoint *b,
|
||
struct gdbarch *gdbarch,
|
||
struct symtab_and_line sal,
|
||
char *addr_string,
|
||
const struct breakpoint_ops *ops,
|
||
int tempflag,
|
||
int enabled,
|
||
int from_tty);
|
||
|
||
extern void init_catchpoint (struct breakpoint *b,
|
||
struct gdbarch *gdbarch, int tempflag,
|
||
const char *cond_string,
|
||
const struct breakpoint_ops *ops);
|
||
|
||
/* Add breakpoint B on the breakpoint list, and notify the user, the
|
||
target and breakpoint_created observers of its existence. If
|
||
INTERNAL is non-zero, the breakpoint number will be allocated from
|
||
the internal breakpoint count. If UPDATE_GLL is non-zero,
|
||
update_global_location_list will be called. */
|
||
|
||
extern void install_breakpoint (int internal, struct breakpoint *b,
|
||
int update_gll);
|
||
|
||
/* Flags that can be passed down to create_breakpoint, etc., to affect
|
||
breakpoint creation in several ways. */
|
||
|
||
enum breakpoint_create_flags
|
||
{
|
||
/* We're adding a breakpoint to our tables that is already
|
||
inserted in the target. */
|
||
CREATE_BREAKPOINT_FLAGS_INSERTED = 1 << 0
|
||
};
|
||
|
||
/* Set a breakpoint. This function is shared between CLI and MI functions
|
||
for setting a breakpoint at LOCATION.
|
||
|
||
This function has two major modes of operations, selected by the
|
||
PARSE_EXTRA parameter.
|
||
|
||
If PARSE_EXTRA is zero, LOCATION is just the breakpoint's location,
|
||
with condition, thread, and extra string specified by the COND_STRING,
|
||
THREAD, and EXTRA_STRING parameters.
|
||
|
||
If PARSE_EXTRA is non-zero, this function will attempt to extract
|
||
the condition, thread, and extra string from EXTRA_STRING, ignoring
|
||
the similarly named parameters.
|
||
|
||
If INTERNAL is non-zero, the breakpoint number will be allocated
|
||
from the internal breakpoint count.
|
||
|
||
Returns true if any breakpoint was created; false otherwise. */
|
||
|
||
extern int create_breakpoint (struct gdbarch *gdbarch,
|
||
const struct event_location *location,
|
||
char *cond_string, int thread,
|
||
char *extra_string,
|
||
int parse_extra,
|
||
int tempflag, enum bptype wanted_type,
|
||
int ignore_count,
|
||
enum auto_boolean pending_break_support,
|
||
const struct breakpoint_ops *ops,
|
||
int from_tty,
|
||
int enabled,
|
||
int internal, unsigned flags);
|
||
|
||
extern void insert_breakpoints (void);
|
||
|
||
extern int remove_breakpoints (void);
|
||
|
||
extern int remove_breakpoints_pid (int pid);
|
||
|
||
/* This function can be used to physically insert eventpoints from the
|
||
specified traced inferior process, without modifying the breakpoint
|
||
package's state. This can be useful for those targets which
|
||
support following the processes of a fork() or vfork() system call,
|
||
when both of the resulting two processes are to be followed. */
|
||
extern int reattach_breakpoints (int);
|
||
|
||
/* This function can be used to update the breakpoint package's state
|
||
after an exec() system call has been executed.
|
||
|
||
This function causes the following:
|
||
|
||
- All eventpoints are marked "not inserted".
|
||
- All eventpoints with a symbolic address are reset such that
|
||
the symbolic address must be reevaluated before the eventpoints
|
||
can be reinserted.
|
||
- The solib breakpoints are explicitly removed from the breakpoint
|
||
list.
|
||
- A step-resume breakpoint, if any, is explicitly removed from the
|
||
breakpoint list.
|
||
- All eventpoints without a symbolic address are removed from the
|
||
breakpoint list. */
|
||
extern void update_breakpoints_after_exec (void);
|
||
|
||
/* This function can be used to physically remove hardware breakpoints
|
||
and watchpoints from the specified traced inferior process, without
|
||
modifying the breakpoint package's state. This can be useful for
|
||
those targets which support following the processes of a fork() or
|
||
vfork() system call, when one of the resulting two processes is to
|
||
be detached and allowed to run free.
|
||
|
||
It is an error to use this function on the process whose id is
|
||
inferior_ptid. */
|
||
extern int detach_breakpoints (ptid_t ptid);
|
||
|
||
/* This function is called when program space PSPACE is about to be
|
||
deleted. It takes care of updating breakpoints to not reference
|
||
this PSPACE anymore. */
|
||
extern void breakpoint_program_space_exit (struct program_space *pspace);
|
||
|
||
extern void set_longjmp_breakpoint (struct thread_info *tp,
|
||
struct frame_id frame);
|
||
extern void delete_longjmp_breakpoint (int thread);
|
||
|
||
/* Mark all longjmp breakpoints from THREAD for later deletion. */
|
||
extern void delete_longjmp_breakpoint_at_next_stop (int thread);
|
||
|
||
extern struct breakpoint *set_longjmp_breakpoint_for_call_dummy (void);
|
||
extern void check_longjmp_breakpoint_for_call_dummy (struct thread_info *tp);
|
||
|
||
extern void enable_overlay_breakpoints (void);
|
||
extern void disable_overlay_breakpoints (void);
|
||
|
||
extern void set_std_terminate_breakpoint (void);
|
||
extern void delete_std_terminate_breakpoint (void);
|
||
|
||
/* These functions respectively disable or reenable all currently
|
||
enabled watchpoints. When disabled, the watchpoints are marked
|
||
call_disabled. When re-enabled, they are marked enabled.
|
||
|
||
The intended client of these functions is call_function_by_hand.
|
||
|
||
The inferior must be stopped, and all breakpoints removed, when
|
||
these functions are used.
|
||
|
||
The need for these functions is that on some targets (e.g., HP-UX),
|
||
gdb is unable to unwind through the dummy frame that is pushed as
|
||
part of the implementation of a call command. Watchpoints can
|
||
cause the inferior to stop in places where this frame is visible,
|
||
and that can cause execution control to become very confused.
|
||
|
||
Note that if a user sets breakpoints in an interactively called
|
||
function, the call_disabled watchpoints will have been re-enabled
|
||
when the first such breakpoint is reached. However, on targets
|
||
that are unable to unwind through the call dummy frame, watches
|
||
of stack-based storage may then be deleted, because gdb will
|
||
believe that their watched storage is out of scope. (Sigh.) */
|
||
extern void disable_watchpoints_before_interactive_call_start (void);
|
||
|
||
extern void enable_watchpoints_after_interactive_call_stop (void);
|
||
|
||
/* These functions disable and re-enable all breakpoints during
|
||
inferior startup. They are intended to be called from solib
|
||
code where necessary. This is needed on platforms where the
|
||
main executable is relocated at some point during startup
|
||
processing, making breakpoint addresses invalid.
|
||
|
||
If additional breakpoints are created after the routine
|
||
disable_breakpoints_before_startup but before the routine
|
||
enable_breakpoints_after_startup was called, they will also
|
||
be marked as disabled. */
|
||
extern void disable_breakpoints_before_startup (void);
|
||
extern void enable_breakpoints_after_startup (void);
|
||
|
||
/* For script interpreters that need to define breakpoint commands
|
||
after they've already read the commands into a struct
|
||
command_line. */
|
||
extern enum command_control_type commands_from_control_command
|
||
(const char *arg, struct command_line *cmd);
|
||
|
||
extern void clear_breakpoint_hit_counts (void);
|
||
|
||
extern struct breakpoint *get_breakpoint (int num);
|
||
|
||
/* The following are for displays, which aren't really breakpoints,
|
||
but here is as good a place as any for them. */
|
||
|
||
extern void disable_current_display (void);
|
||
|
||
extern void do_displays (void);
|
||
|
||
extern void disable_display (int);
|
||
|
||
extern void clear_displays (void);
|
||
|
||
extern void disable_breakpoint (struct breakpoint *);
|
||
|
||
extern void enable_breakpoint (struct breakpoint *);
|
||
|
||
extern void breakpoint_set_commands (struct breakpoint *b,
|
||
command_line_up &&commands);
|
||
|
||
extern void breakpoint_set_silent (struct breakpoint *b, int silent);
|
||
|
||
extern void breakpoint_set_thread (struct breakpoint *b, int thread);
|
||
|
||
extern void breakpoint_set_task (struct breakpoint *b, int task);
|
||
|
||
/* Clear the "inserted" flag in all breakpoints. */
|
||
extern void mark_breakpoints_out (void);
|
||
|
||
extern struct breakpoint *create_jit_event_breakpoint (struct gdbarch *,
|
||
CORE_ADDR);
|
||
|
||
extern struct breakpoint *create_solib_event_breakpoint (struct gdbarch *,
|
||
CORE_ADDR);
|
||
|
||
/* Create an solib event breakpoint at ADDRESS in the current program
|
||
space, and immediately try to insert it. Returns a pointer to the
|
||
breakpoint on success. Deletes the new breakpoint and returns NULL
|
||
if inserting the breakpoint fails. */
|
||
extern struct breakpoint *create_and_insert_solib_event_breakpoint
|
||
(struct gdbarch *gdbarch, CORE_ADDR address);
|
||
|
||
extern struct breakpoint *create_thread_event_breakpoint (struct gdbarch *,
|
||
CORE_ADDR);
|
||
|
||
extern void remove_jit_event_breakpoints (void);
|
||
|
||
extern void remove_solib_event_breakpoints (void);
|
||
|
||
/* Mark solib event breakpoints of the current program space with
|
||
delete at next stop disposition. */
|
||
extern void remove_solib_event_breakpoints_at_next_stop (void);
|
||
|
||
extern void disable_breakpoints_in_shlibs (void);
|
||
|
||
/* This function returns TRUE if ep is a catchpoint. */
|
||
extern int is_catchpoint (struct breakpoint *);
|
||
|
||
/* Shared helper function (MI and CLI) for creating and installing
|
||
a shared object event catchpoint. */
|
||
extern void add_solib_catchpoint (const char *arg, int is_load, int is_temp,
|
||
int enabled);
|
||
|
||
/* Enable breakpoints and delete when hit. Called with ARG == NULL
|
||
deletes all breakpoints. */
|
||
extern void delete_command (char *arg, int from_tty);
|
||
|
||
/* Create and insert a new software single step breakpoint for the
|
||
current thread. May be called multiple times; each time will add a
|
||
new location to the set of potential addresses the next instruction
|
||
is at. */
|
||
extern void insert_single_step_breakpoint (struct gdbarch *,
|
||
struct address_space *,
|
||
CORE_ADDR);
|
||
|
||
/* Insert all software single step breakpoints for the current frame.
|
||
Return true if any software single step breakpoints are inserted,
|
||
otherwise, return false. */
|
||
extern int insert_single_step_breakpoints (struct gdbarch *);
|
||
|
||
/* Check if any hardware watchpoints have triggered, according to the
|
||
target. */
|
||
int watchpoints_triggered (struct target_waitstatus *);
|
||
|
||
/* Helper for transparent breakpoint hiding for memory read and write
|
||
routines.
|
||
|
||
Update one of READBUF or WRITEBUF with either the shadows
|
||
(READBUF), or the breakpoint instructions (WRITEBUF) of inserted
|
||
breakpoints at the memory range defined by MEMADDR and extending
|
||
for LEN bytes. If writing, then WRITEBUF is a copy of WRITEBUF_ORG
|
||
on entry.*/
|
||
extern void breakpoint_xfer_memory (gdb_byte *readbuf, gdb_byte *writebuf,
|
||
const gdb_byte *writebuf_org,
|
||
ULONGEST memaddr, LONGEST len);
|
||
|
||
/* Return true if breakpoints should be inserted now. That'll be the
|
||
case if either:
|
||
|
||
- the target has global breakpoints.
|
||
|
||
- "breakpoint always-inserted" is on, and the target has
|
||
execution.
|
||
|
||
- threads are executing.
|
||
*/
|
||
extern int breakpoints_should_be_inserted_now (void);
|
||
|
||
/* Called each time new event from target is processed.
|
||
Retires previously deleted breakpoint locations that
|
||
in our opinion won't ever trigger. */
|
||
extern void breakpoint_retire_moribund (void);
|
||
|
||
/* Set break condition of breakpoint B to EXP. */
|
||
extern void set_breakpoint_condition (struct breakpoint *b, const char *exp,
|
||
int from_tty);
|
||
|
||
/* Checks if we are catching syscalls or not.
|
||
Returns 0 if not, greater than 0 if we are. */
|
||
extern int catch_syscall_enabled (void);
|
||
|
||
/* Checks if we are catching syscalls with the specific
|
||
syscall_number. Used for "filtering" the catchpoints.
|
||
Returns 0 if not, greater than 0 if we are. */
|
||
extern int catching_syscall_number (int syscall_number);
|
||
|
||
/* Return a tracepoint with the given number if found. */
|
||
extern struct tracepoint *get_tracepoint (int num);
|
||
|
||
extern struct tracepoint *get_tracepoint_by_number_on_target (int num);
|
||
|
||
/* Find a tracepoint by parsing a number in the supplied string. */
|
||
extern struct tracepoint *
|
||
get_tracepoint_by_number (char **arg,
|
||
number_or_range_parser *parser);
|
||
|
||
/* Return a vector of all tracepoints currently defined. The vector
|
||
is newly allocated; the caller should free when done with it. */
|
||
extern VEC(breakpoint_p) *all_tracepoints (void);
|
||
|
||
extern int is_tracepoint (const struct breakpoint *b);
|
||
|
||
/* Return a vector of all static tracepoints defined at ADDR. The
|
||
vector is newly allocated; the caller should free when done with
|
||
it. */
|
||
extern VEC(breakpoint_p) *static_tracepoints_here (CORE_ADDR addr);
|
||
|
||
/* Function that can be passed to read_command_line to validate
|
||
that each command is suitable for tracepoint command list. */
|
||
extern void check_tracepoint_command (char *line, void *closure);
|
||
|
||
/* Call at the start and end of an "rbreak" command to register
|
||
breakpoint numbers for a later "commands" command. */
|
||
extern void start_rbreak_breakpoints (void);
|
||
extern void end_rbreak_breakpoints (void);
|
||
|
||
/* Breakpoint iterator function.
|
||
|
||
Calls a callback function once for each breakpoint, so long as the
|
||
callback function returns false. If the callback function returns
|
||
true, the iteration will end and the current breakpoint will be
|
||
returned. This can be useful for implementing a search for a
|
||
breakpoint with arbitrary attributes, or for applying an operation
|
||
to every breakpoint. */
|
||
extern struct breakpoint *iterate_over_breakpoints (int (*) (struct breakpoint *,
|
||
void *), void *);
|
||
|
||
/* Nonzero if the specified PC cannot be a location where functions
|
||
have been inlined. */
|
||
|
||
extern int pc_at_non_inline_function (struct address_space *aspace,
|
||
CORE_ADDR pc,
|
||
const struct target_waitstatus *ws);
|
||
|
||
extern int user_breakpoint_p (struct breakpoint *);
|
||
|
||
/* Return true if this breakpoint is pending, false if not. */
|
||
extern int pending_breakpoint_p (struct breakpoint *);
|
||
|
||
/* Attempt to determine architecture of location identified by SAL. */
|
||
extern struct gdbarch *get_sal_arch (struct symtab_and_line sal);
|
||
|
||
extern void breakpoint_free_objfile (struct objfile *objfile);
|
||
|
||
extern const char *ep_parse_optional_if_clause (const char **arg);
|
||
|
||
/* Print the "Thread ID hit" part of "Thread ID hit Breakpoint N" to
|
||
UIOUT iff debugging multiple threads. */
|
||
extern void maybe_print_thread_hit_breakpoint (struct ui_out *uiout);
|
||
|
||
#endif /* !defined (BREAKPOINT_H) */
|