847 lines
31 KiB
C
847 lines
31 KiB
C
/* Data structures associated with breakpoints in GDB.
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Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
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2002, 2003, 2004, 2007 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., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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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 "gdb-events.h"
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struct value;
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struct block;
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/* This is the maximum number of bytes a breakpoint instruction can take.
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Feel free to increase it. It's just used in a few places to size
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arrays that should be independent of the target architecture. */
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#define BREAKPOINT_MAX 16
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/* Type of breakpoint. */
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/* FIXME In the future, we should fold all other breakpoint-like things into
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here. This includes:
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* single-step (for machines where we have to simulate single stepping)
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(probably, though perhaps it is better for it to look as much as
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possible like a single-step to wait_for_inferior). */
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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_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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/* Used by wait_for_inferior for stepping over subroutine calls, for
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stepping over signal handlers, and for skipping prologues. */
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bp_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. */
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/* FIXME: What if the function we are calling longjmp()s out of the
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call, or the user gets out with the "return" command? We currently
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have no way of cleaning up the breakpoint in these (obscure) situations.
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(Probably can solve this by noticing longjmp, "return", etc., it's
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similar to noticing when a watchpoint on a local variable goes out
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of scope (with hardware support for watchpoints)). */
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bp_call_dummy,
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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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/* These breakpoints are used to implement the "catch load" command
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on platforms whose dynamic linkers support such functionality. */
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bp_catch_load,
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/* These breakpoints are used to implement the "catch unload" command
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on platforms whose dynamic linkers support such functionality. */
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bp_catch_unload,
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/* These are not really breakpoints, but are catchpoints that
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implement the "catch fork", "catch vfork" and "catch exec" commands
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on platforms whose kernel support such functionality. (I.e.,
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kernels which can raise an event when a fork or exec occurs, as
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opposed to the debugger setting breakpoints on functions named
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"fork" or "exec".) */
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bp_catch_fork,
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bp_catch_vfork,
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bp_catch_exec,
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/* These are catchpoints to implement "catch catch" and "catch throw"
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commands for C++ exception handling. */
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bp_catch_catch,
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bp_catch_throw
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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 trigger. */
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bp_enabled, /* The eventpoint is active, and can trigger. */
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bp_shlib_disabled, /* The eventpoint's address is in an unloaded solib.
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The eventpoint will be automatically enabled
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and reset when that solib is loaded. */
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bp_call_disabled, /* The eventpoint has been disabled while a call
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into the inferior is "in flight", because some
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eventpoints interfere with the implementation of
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a call on some targets. The eventpoint will be
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automatically enabled and reset when the call
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"lands" (either completes, or stops at another
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eventpoint). */
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bp_permanent /* There is a breakpoint instruction hard-wired into
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the target's code. Don't try to write another
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breakpoint instruction on top of it, or restore
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its value. Step over it using the architecture's
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SKIP_INSN macro. */
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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, 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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enum target_hw_bp_type
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{
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hw_write = 0, /* Common HW watchpoint */
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hw_read = 1, /* Read HW watchpoint */
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hw_access = 2, /* Access HW watchpoint */
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hw_execute = 3 /* Execute HW breakpoint */
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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 at which the breakpoint was placed. This is normally the
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same as ADDRESS from the bp_location, except when adjustment
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happens in BREAKPOINT_FROM_PC. The most common form of
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adjustment is stripping an alternate ISA marker from the PC which
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is used to determine the type of breakpoint to insert. */
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CORE_ADDR placed_address;
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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 size of the placed breakpoint, according to
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BREAKPOINT_FROM_PC, when the breakpoint was inserted. This is
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generally the same as SHADOW_LEN, unless we did not need
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to read from the target to implement the memory breakpoint
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(e.g. if a remote stub handled the details). We may still
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need the size to remove the breakpoint safely. */
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int placed_size;
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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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struct bp_location
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{
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/* Chain pointer to the next breakpoint location. */
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struct bp_location *next;
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/* Type of this breakpoint location. */
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enum 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 and the DUPLICATE flag are more straightforward
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than reference counting. */
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struct breakpoint *owner;
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/* Nonzero if this breakpoint is now inserted. */
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char inserted;
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/* Nonzero if this is not the first breakpoint in the list
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for the given address. */
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char duplicate;
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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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/* 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;
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/* For any breakpoint type with an address, this is the BFD section
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associated with the address. Used primarily for overlay debugging. */
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asection *section;
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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
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processor's architectual constraints. */
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CORE_ADDR requested_address;
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/* Details of the placed breakpoint, when inserted. */
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struct bp_target_info target_info;
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/* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
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struct bp_target_info overlay_target_info;
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};
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/* This structure is a collection of function pointers that, if available,
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will be called instead of the performing the default action for this
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bptype. */
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struct breakpoint_ops
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{
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/* The normal print routine for this breakpoint, called when we
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hit it. */
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enum print_stop_action (*print_it) (struct breakpoint *);
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/* Display information about this breakpoint, for "info breakpoints". */
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void (*print_one) (struct breakpoint *, CORE_ADDR *);
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/* Display information about this breakpoint after setting it (roughly
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speaking; this is called from "mention"). */
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void (*print_mention) (struct breakpoint *);
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};
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/* Note that the ->silent field is not currently used by any commands
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(though the code is in there if it was to be, and set_raw_breakpoint
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does set it to 0). I implemented it because I thought it would be
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useful for a hack I had to put in; I'm going to leave it in because
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I can see how there might be times when it would indeed be useful */
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/* This is for a breakpoint or a watchpoint. */
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struct breakpoint
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{
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struct breakpoint *next;
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/* Type of breakpoint. */
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enum bptype type;
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/* Zero means disabled; remember the info but don't break here. */
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enum enable_state enable_state;
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/* What to do with this breakpoint after we hit it. */
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enum bpdisp disposition;
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/* Number assigned to distinguish breakpoints. */
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int number;
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/* Location(s) associated with this high-level breakpoint. */
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struct bp_location *loc;
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/* Line number of this address. */
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int line_number;
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/* Source file name of this address. */
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char *source_file;
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/* Non-zero means a silent breakpoint (don't print frame info
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if we stop here). */
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unsigned char silent;
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/* Number of stops at this breakpoint that should
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be continued automatically before really stopping. */
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int ignore_count;
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/* Chain of command lines to execute when this breakpoint is hit. */
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struct command_line *commands;
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/* Stack depth (address of frame). If nonzero, break only if fp
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equals this. */
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struct frame_id frame_id;
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/* Conditional. Break only if this expression's value is nonzero. */
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struct expression *cond;
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/* String we used to set the breakpoint (malloc'd). */
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char *addr_string;
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/* Language we used to set the breakpoint. */
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enum language language;
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/* Input radix we used to set the breakpoint. */
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int input_radix;
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/* String form of the breakpoint condition (malloc'd), or NULL if there
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is no condition. */
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char *cond_string;
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/* String form of exp (malloc'd), or NULL if none. */
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char *exp_string;
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/* The expression we are watching, or NULL if not a watchpoint. */
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struct expression *exp;
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/* The largest block within which it is valid, or NULL if it is
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valid anywhere (e.g. consists just of global symbols). */
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struct block *exp_valid_block;
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/* Value of the watchpoint the last time we checked it. */
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struct value *val;
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/* Holds the value chain for a hardware watchpoint expression. */
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struct value *val_chain;
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/* Holds the address of the related watchpoint_scope breakpoint
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when using watchpoints on local variables (might the concept
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of a related breakpoint be useful elsewhere, if not just call
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it the watchpoint_scope breakpoint or something like that. FIXME). */
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struct breakpoint *related_breakpoint;
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/* Holds the frame address which identifies the frame this
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watchpoint should be evaluated in, or `null' if the watchpoint
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should be evaluated on the outermost frame. */
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struct frame_id watchpoint_frame;
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/* Thread number for thread-specific breakpoint, or -1 if don't care */
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int thread;
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/* Count of the number of times this breakpoint was taken, dumped
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with the info, but not used for anything else. Useful for
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seeing how many times you hit a break prior to the program
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aborting, so you can back up to just before the abort. */
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int hit_count;
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/* Filename of a dynamically-linked library (dll), used for
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bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
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library is significant. */
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char *dll_pathname;
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/* Filename of a dll whose state change (e.g., load or unload)
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triggered this catchpoint. This field is only valid immediately
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after this catchpoint has triggered. */
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char *triggered_dll_pathname;
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/* Process id of a child process whose forking triggered this
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catchpoint. This field is only valid immediately after this
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catchpoint has triggered. */
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int forked_inferior_pid;
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/* Filename of a program whose exec triggered this catchpoint.
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This field is only valid immediately after this catchpoint has
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triggered. */
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char *exec_pathname;
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/* Methods associated with this breakpoint. */
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struct breakpoint_ops *ops;
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/* Was breakpoint issued from a tty? Saved for the use of pending breakpoints. */
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int from_tty;
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/* Flag value for pending breakpoint.
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first bit : 0 non-temporary, 1 temporary.
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second bit : 0 normal breakpoint, 1 hardware breakpoint. */
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int flag;
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/* Is breakpoint pending on shlib loads? */
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int pending;
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};
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/* The following stuff is an abstract data type "bpstat" ("breakpoint
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status"). This provides the ability to determine whether we have
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stopped at a breakpoint, and what we should do about it. */
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typedef struct bpstats *bpstat;
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/* Interface: */
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/* Clear a bpstat so that it says we are not at any breakpoint.
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Also free any storage that is part of a bpstat. */
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extern void bpstat_clear (bpstat *);
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/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
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is part of the bpstat is copied as well. */
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extern bpstat bpstat_copy (bpstat);
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extern bpstat bpstat_stop_status (CORE_ADDR pc, ptid_t ptid,
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int stopped_by_watchpoint);
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/* This bpstat_what stuff tells wait_for_inferior what to do with a
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breakpoint (a challenging task). */
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enum bpstat_what_main_action
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{
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/* Perform various other tests; that is, this bpstat does not
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say to perform any action (e.g. failed watchpoint and nothing
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else). */
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BPSTAT_WHAT_KEEP_CHECKING,
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/* Rather than distinguish between noisy and silent stops here, it
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might be cleaner to have bpstat_print make that decision (also
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taking into account stop_print_frame and source_only). But the
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implications are a bit scary (interaction with auto-displays, etc.),
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so I won't try it. */
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/* Stop silently. */
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BPSTAT_WHAT_STOP_SILENT,
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/* Stop and print. */
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BPSTAT_WHAT_STOP_NOISY,
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/* Remove breakpoints, single step once, then put them back in and
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go back to what we were doing. It's possible that this should be
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removed from the main_action and put into a separate field, to more
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cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
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BPSTAT_WHAT_SINGLE,
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/* Set longjmp_resume breakpoint, remove all other breakpoints,
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and continue. The "remove all other breakpoints" part is required
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if we are also stepping over another breakpoint as well as doing
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the longjmp handling. */
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BPSTAT_WHAT_SET_LONGJMP_RESUME,
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/* Clear longjmp_resume breakpoint, then handle as
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BPSTAT_WHAT_KEEP_CHECKING. */
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BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
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/* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
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BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
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/* Clear step resume breakpoint, and keep checking. */
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BPSTAT_WHAT_STEP_RESUME,
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/* Check the dynamic linker's data structures for new libraries, then
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keep checking. */
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BPSTAT_WHAT_CHECK_SHLIBS,
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/* Check the dynamic linker's data structures for new libraries, then
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resume out of the dynamic linker's callback, stop and print. */
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BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK,
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/* This is just used to keep track of how many enums there are. */
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BPSTAT_WHAT_LAST
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};
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struct bpstat_what
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{
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enum bpstat_what_main_action main_action;
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/* Did we hit a call dummy breakpoint? This only goes with a main_action
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of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
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continuing from a call dummy without popping the frame is not a
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useful one). */
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||
int call_dummy;
|
||
};
|
||
|
||
/* The possible return values for print_bpstat, print_it_normal,
|
||
print_it_done, print_it_noop. */
|
||
enum print_stop_action
|
||
{
|
||
PRINT_UNKNOWN = -1,
|
||
PRINT_SRC_AND_LOC,
|
||
PRINT_SRC_ONLY,
|
||
PRINT_NOTHING
|
||
};
|
||
|
||
/* Tell what to do about this bpstat. */
|
||
struct bpstat_what bpstat_what (bpstat);
|
||
|
||
/* Find the bpstat associated with a breakpoint. NULL otherwise. */
|
||
bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *);
|
||
|
||
/* Find a step_resume breakpoint associated with this bpstat.
|
||
(If there are multiple step_resume bp's on the list, this function
|
||
will arbitrarily pick one.)
|
||
|
||
It is an error to use this function if BPSTAT doesn't contain a
|
||
step_resume breakpoint.
|
||
|
||
See wait_for_inferior's use of this function.
|
||
*/
|
||
extern struct breakpoint *bpstat_find_step_resume_breakpoint (bpstat);
|
||
|
||
/* Nonzero if a signal that we got in wait() was due to circumstances
|
||
explained by the BS. */
|
||
/* Currently that is true if we have hit a breakpoint, or if there is
|
||
a watchpoint enabled. */
|
||
#define bpstat_explains_signal(bs) ((bs) != NULL)
|
||
|
||
/* 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);
|
||
|
||
/* Nonzero if there are enabled hardware watchpoints. */
|
||
extern int bpstat_have_active_hw_watchpoints (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);
|
||
|
||
/* 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 having stopped at *BSP. 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 (bpstat *);
|
||
|
||
/* Modify BS so that the actions will not be performed. */
|
||
extern void bpstat_clear_actions (bpstat);
|
||
|
||
/* Given a bpstat that records zero or more triggered eventpoints, this
|
||
function returns another bpstat which contains only the catchpoints
|
||
on that first list, if any.
|
||
*/
|
||
extern void bpstat_get_triggered_catchpoints (bpstat, bpstat *);
|
||
|
||
/* 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 two breakpoints at the same
|
||
place, and a bpstat reflects the fact that both have been hit. */
|
||
bpstat next;
|
||
/* Breakpoint that we are at. */
|
||
struct breakpoint *breakpoint_at;
|
||
/* Commands left to be done. */
|
||
struct 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
|
||
};
|
||
|
||
/* 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. */
|
||
|
||
extern enum breakpoint_here breakpoint_here_p (CORE_ADDR);
|
||
|
||
extern int breakpoint_inserted_here_p (CORE_ADDR);
|
||
|
||
extern int software_breakpoint_inserted_here_p (CORE_ADDR);
|
||
|
||
extern int breakpoint_thread_match (CORE_ADDR, ptid_t);
|
||
|
||
extern void until_break_command (char *, int, int);
|
||
|
||
extern void breakpoint_re_set (void);
|
||
|
||
extern void breakpoint_re_set_thread (struct breakpoint *);
|
||
|
||
extern int ep_is_exception_catchpoint (struct breakpoint *);
|
||
|
||
extern struct breakpoint *set_momentary_breakpoint
|
||
(struct symtab_and_line, struct frame_id, enum bptype);
|
||
|
||
extern void set_ignore_count (int, int, int);
|
||
|
||
extern void set_default_breakpoint (int, CORE_ADDR, struct symtab *, int);
|
||
|
||
extern void mark_breakpoints_out (void);
|
||
|
||
extern void breakpoint_init_inferior (enum inf_context);
|
||
|
||
extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *);
|
||
|
||
extern struct cleanup *make_exec_cleanup_delete_breakpoint (struct breakpoint *);
|
||
|
||
extern void delete_breakpoint (struct breakpoint *);
|
||
|
||
extern void breakpoint_auto_delete (bpstat);
|
||
|
||
extern void breakpoint_clear_ignore_counts (void);
|
||
|
||
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);
|
||
extern void awatch_command_wrapper (char *, int);
|
||
extern void rwatch_command_wrapper (char *, int);
|
||
extern void tbreak_command (char *, int);
|
||
|
||
extern int insert_breakpoints (void);
|
||
|
||
extern int remove_breakpoints (void);
|
||
|
||
/* 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 (int);
|
||
|
||
extern void enable_longjmp_breakpoint (void);
|
||
extern void disable_longjmp_breakpoint (void);
|
||
extern void enable_overlay_breakpoints (void);
|
||
extern void disable_overlay_breakpoints (void);
|
||
|
||
extern void set_longjmp_resume_breakpoint (CORE_ADDR, struct frame_id);
|
||
/* These functions respectively disable or reenable all currently
|
||
enabled watchpoints. When disabled, the watchpoints are marked
|
||
call_disabled. When reenabled, 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 reenabled
|
||
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);
|
||
|
||
/* 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
|
||
(char *arg, struct command_line *cmd);
|
||
|
||
extern void clear_breakpoint_hit_counts (void);
|
||
|
||
extern int get_number (char **);
|
||
|
||
extern int get_number_or_range (char **);
|
||
|
||
/* 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 make_breakpoint_permanent (struct breakpoint *);
|
||
|
||
extern struct breakpoint *create_solib_event_breakpoint (CORE_ADDR);
|
||
|
||
extern struct breakpoint *create_thread_event_breakpoint (CORE_ADDR);
|
||
|
||
extern void remove_solib_event_breakpoints (void);
|
||
|
||
extern void remove_thread_event_breakpoints (void);
|
||
|
||
extern void disable_breakpoints_in_shlibs (int silent);
|
||
|
||
extern void re_enable_breakpoints_in_shlibs (void);
|
||
|
||
extern void create_solib_load_event_breakpoint (char *, int, char *, char *);
|
||
|
||
extern void create_solib_unload_event_breakpoint (char *, int,
|
||
char *, char *);
|
||
|
||
extern void create_fork_event_catchpoint (int, char *);
|
||
|
||
extern void create_vfork_event_catchpoint (int, char *);
|
||
|
||
extern void create_exec_event_catchpoint (int, char *);
|
||
|
||
/* This function returns TRUE if ep is a catchpoint. */
|
||
extern int ep_is_catchpoint (struct breakpoint *);
|
||
|
||
/* This function returns TRUE if ep is a catchpoint of a
|
||
shared library (aka dynamically-linked library) event,
|
||
such as a library load or unload. */
|
||
extern int ep_is_shlib_catchpoint (struct breakpoint *);
|
||
|
||
extern struct breakpoint *set_breakpoint_sal (struct symtab_and_line);
|
||
|
||
/* Enable breakpoints and delete when hit. Called with ARG == NULL
|
||
deletes all breakpoints. */
|
||
extern void delete_command (char *arg, int from_tty);
|
||
|
||
/* Pull all H/W watchpoints from the target. Return non-zero if the
|
||
remove fails. */
|
||
extern int remove_hw_watchpoints (void);
|
||
|
||
/* Manage a software single step breakpoint (or two). Insert may be called
|
||
twice before remove is called. */
|
||
extern void insert_single_step_breakpoint (CORE_ADDR);
|
||
extern void remove_single_step_breakpoints (void);
|
||
|
||
/* Manage manual breakpoints, separate from the normal chain of
|
||
breakpoints. These functions are used in murky target-specific
|
||
ways. Please do not add more uses! */
|
||
extern void *deprecated_insert_raw_breakpoint (CORE_ADDR);
|
||
extern int deprecated_remove_raw_breakpoint (void *);
|
||
|
||
/* Indicator of whether exception catchpoints should be nuked between
|
||
runs of a program. */
|
||
extern int deprecated_exception_catchpoints_are_fragile;
|
||
|
||
/* Indicator of when exception catchpoints set-up should be
|
||
reinitialized -- e.g. when program is re-run. */
|
||
extern int deprecated_exception_support_initialized;
|
||
|
||
#endif /* !defined (BREAKPOINT_H) */
|