/* Data structures associated with breakpoints in GDB.
- Copyright (C) 1992 Free Software Foundation, Inc.
+ Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2003, 2004
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#if !defined (BREAKPOINT_H)
#define BREAKPOINT_H 1
#include "frame.h"
#include "value.h"
+#include "gdb-events.h"
+
+struct value;
+struct block;
+
/* This is the maximum number of bytes a breakpoint instruction can take.
Feel free to increase it. It's just used in a few places to size
arrays that should be independent of the target architecture. */
here. This includes:
* single-step (for machines where we have to simulate single stepping)
- (probably, though perhaps it is better for it to look as much as
- possible like a single-step to wait_for_inferior). */
-
-enum bptype {
- bp_breakpoint, /* Normal breakpoint */
- bp_until, /* used by until command */
- bp_finish, /* used by finish command */
- bp_watchpoint, /* Watchpoint */
- bp_longjmp, /* secret breakpoint to find longjmp() */
- bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
-
- /* Used by wait_for_inferior for stepping over subroutine calls, for
- stepping over signal handlers, and for skipping prologues. */
- bp_step_resume,
-
- /* The breakpoint at the end of a call dummy. */
- bp_call_dummy
-};
+ (probably, though perhaps it is better for it to look as much as
+ possible like a single-step to wait_for_inferior). */
+
+enum bptype
+ {
+ bp_none = 0, /* Eventpoint has been deleted. */
+ bp_breakpoint, /* Normal breakpoint */
+ bp_hardware_breakpoint, /* Hardware assisted breakpoint */
+ bp_until, /* used by until command */
+ bp_finish, /* used by finish command */
+ bp_watchpoint, /* Watchpoint */
+ bp_hardware_watchpoint, /* Hardware assisted watchpoint */
+ bp_read_watchpoint, /* read watchpoint, (hardware assisted) */
+ bp_access_watchpoint, /* access watchpoint, (hardware assisted) */
+ bp_longjmp, /* secret breakpoint to find longjmp() */
+ bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
+
+ /* Used by wait_for_inferior for stepping over subroutine calls, for
+ stepping over signal handlers, and for skipping prologues. */
+ bp_step_resume,
+
+ /* Used by wait_for_inferior for stepping over signal handlers. */
+ bp_through_sigtramp,
+
+ /* Used to detect when a watchpoint expression has gone out of
+ scope. These breakpoints are usually not visible to the user.
+
+ This breakpoint has some interesting properties:
+
+ 1) There's always a 1:1 mapping between watchpoints
+ on local variables and watchpoint_scope breakpoints.
+
+ 2) It automatically deletes itself and the watchpoint it's
+ associated with when hit.
+
+ 3) It can never be disabled. */
+ bp_watchpoint_scope,
+
+ /* The breakpoint at the end of a call dummy. */
+ /* FIXME: What if the function we are calling longjmp()s out of the
+ call, or the user gets out with the "return" command? We currently
+ have no way of cleaning up the breakpoint in these (obscure) situations.
+ (Probably can solve this by noticing longjmp, "return", etc., it's
+ similar to noticing when a watchpoint on a local variable goes out
+ of scope (with hardware support for watchpoints)). */
+ bp_call_dummy,
+
+ /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
+ code in the inferior to run when significant events occur in the
+ dynamic linker (for example a library is loaded or unloaded).
+
+ By placing a breakpoint in this magic code GDB will get control
+ when these significant events occur. GDB can then re-examine
+ the dynamic linker's data structures to discover any newly loaded
+ dynamic libraries. */
+ bp_shlib_event,
+
+ /* Some multi-threaded systems can arrange for a location in the
+ inferior to be executed when certain thread-related events occur
+ (such as thread creation or thread death).
+
+ By placing a breakpoint at one of these locations, GDB will get
+ control when these events occur. GDB can then update its thread
+ lists etc. */
+
+ bp_thread_event,
+
+ /* On the same principal, an overlay manager can arrange to call a
+ magic location in the inferior whenever there is an interesting
+ change in overlay status. GDB can update its overlay tables
+ and fiddle with breakpoints in overlays when this breakpoint
+ is hit. */
+
+ bp_overlay_event,
+
+ /* These breakpoints are used to implement the "catch load" command
+ on platforms whose dynamic linkers support such functionality. */
+ bp_catch_load,
+
+ /* These breakpoints are used to implement the "catch unload" command
+ on platforms whose dynamic linkers support such functionality. */
+ bp_catch_unload,
+
+ /* These are not really breakpoints, but are catchpoints that
+ implement the "catch fork", "catch vfork" and "catch exec" commands
+ on platforms whose kernel support such functionality. (I.e.,
+ kernels which can raise an event when a fork or exec occurs, as
+ opposed to the debugger setting breakpoints on functions named
+ "fork" or "exec".) */
+ bp_catch_fork,
+ bp_catch_vfork,
+ bp_catch_exec,
+
+ /* These are catchpoints to implement "catch catch" and "catch throw"
+ commands for C++ exception handling. */
+ bp_catch_catch,
+ bp_catch_throw
+
+
+ };
/* States of enablement of breakpoint. */
-enum enable { disabled, enabled};
+enum enable_state
+ {
+ bp_disabled, /* The eventpoint is inactive, and cannot trigger. */
+ bp_enabled, /* The eventpoint is active, and can trigger. */
+ bp_shlib_disabled, /* The eventpoint's address is in an unloaded solib.
+ The eventpoint will be automatically enabled
+ and reset when that solib is loaded. */
+ bp_call_disabled, /* The eventpoint has been disabled while a call
+ into the inferior is "in flight", because some
+ eventpoints interfere with the implementation of
+ a call on some targets. The eventpoint will be
+ automatically enabled and reset when the call
+ "lands" (either completes, or stops at another
+ eventpoint). */
+ bp_permanent /* There is a breakpoint instruction hard-wired into
+ the target's code. Don't try to write another
+ breakpoint instruction on top of it, or restore
+ its value. Step over it using the architecture's
+ SKIP_INSN macro. */
+ };
+
/* Disposition of breakpoint. Ie: what to do after hitting it. */
-enum bpdisp {
- delete, /* Delete it */
- disable, /* Disable it */
- donttouch /* Leave it alone */
+enum bpdisp
+ {
+ disp_del, /* Delete it */
+ disp_del_at_next_stop, /* Delete at next stop, whether hit or not */
+ disp_disable, /* Disable it */
+ disp_donttouch /* Leave it alone */
+ };
+
+enum target_hw_bp_type
+ {
+ hw_write = 0, /* Common HW watchpoint */
+ hw_read = 1, /* Read HW watchpoint */
+ hw_access = 2, /* Access HW watchpoint */
+ hw_execute = 3 /* Execute HW breakpoint */
+ };
+
+
+/* Information used by targets to insert and remove breakpoints. */
+
+struct bp_target_info
+{
+ /* Address at which the breakpoint was placed. This is normally the
+ same as ADDRESS from the bp_location, except when adjustment
+ happens in BREAKPOINT_FROM_PC. The most common form of
+ adjustment is stripping an alternate ISA marker from the PC which
+ is used to determine the type of breakpoint to insert. */
+ CORE_ADDR placed_address;
+
+ /* If the breakpoint lives in memory and reading that memory would
+ give back the breakpoint, instead of the original contents, then
+ the original contents are cached here. Only SHADOW_LEN bytes of
+ this buffer are valid, and only when the breakpoint is inserted. */
+ gdb_byte shadow_contents[BREAKPOINT_MAX];
+
+ /* The length of the data cached in SHADOW_CONTENTS. */
+ int shadow_len;
+
+ /* The size of the placed breakpoint, according to
+ BREAKPOINT_FROM_PC, when the breakpoint was inserted. This is
+ generally the same as SHADOW_LEN, unless we did not need
+ to read from the target to implement the memory breakpoint
+ (e.g. if a remote stub handled the details). We may still
+ need the size to remove the breakpoint safely. */
+ int placed_size;
+};
+
+/* GDB maintains two types of information about each breakpoint (or
+ watchpoint, or other related event). The first type corresponds
+ to struct breakpoint; this is a relatively high-level structure
+ which contains the source location(s), stopping conditions, user
+ commands to execute when the breakpoint is hit, and so forth.
+
+ The second type of information corresponds to struct bp_location.
+ Each breakpoint has one or (eventually) more locations associated
+ with it, which represent target-specific and machine-specific
+ mechanisms for stopping the program. For instance, a watchpoint
+ expression may require multiple hardware watchpoints in order to
+ catch all changes in the value of the expression being watched. */
+
+enum bp_loc_type
+{
+ bp_loc_software_breakpoint,
+ bp_loc_hardware_breakpoint,
+ bp_loc_hardware_watchpoint,
+ bp_loc_other /* Miscellaneous... */
+};
+
+struct bp_location
+{
+ /* Chain pointer to the next breakpoint location. */
+ struct bp_location *next;
+
+ /* Type of this breakpoint location. */
+ enum bp_loc_type loc_type;
+
+ /* Each breakpoint location must belong to exactly one higher-level
+ breakpoint. This and the DUPLICATE flag are more straightforward
+ than reference counting. */
+ struct breakpoint *owner;
+
+ /* Nonzero if this breakpoint is now inserted. */
+ char inserted;
+
+ /* Nonzero if this is not the first breakpoint in the list
+ for the given address. */
+ char duplicate;
+
+ /* If we someday support real thread-specific breakpoints, then
+ the breakpoint location will need a thread identifier. */
+
+ /* Data for specific breakpoint types. These could be a union, but
+ simplicity is more important than memory usage for breakpoints. */
+
+ /* Note that zero is a perfectly valid code address on some platforms
+ (for example, the mn10200 (OBSOLETE) and mn10300 simulators). NULL
+ is not a special value for this field. Valid for all types except
+ bp_loc_other. */
+ CORE_ADDR address;
+
+ /* For any breakpoint type with an address, this is the BFD section
+ associated with the address. Used primarily for overlay debugging. */
+ asection *section;
+
+ /* Address at which breakpoint was requested, either by the user or
+ by GDB for internal breakpoints. This will usually be the same
+ as ``address'' (above) except for cases in which
+ ADJUST_BREAKPOINT_ADDRESS has computed a different address at
+ which to place the breakpoint in order to comply with a
+ processor's architectual constraints. */
+ CORE_ADDR requested_address;
+
+ /* Details of the placed breakpoint, when inserted. */
+ struct bp_target_info target_info;
+
+ /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
+ struct bp_target_info overlay_target_info;
+};
+
+/* 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
+{
+ /* The normal print routine for this breakpoint, called when we
+ hit it. */
+ enum print_stop_action (*print_it) (struct breakpoint *);
+
+ /* Display information about this breakpoint, for "info breakpoints". */
+ void (*print_one) (struct breakpoint *, CORE_ADDR *);
+
+ /* Display information about this breakpoint after setting it (roughly
+ speaking; this is called from "mention"). */
+ void (*print_mention) (struct breakpoint *);
};
/* Note that the ->silent field is not currently used by any commands
/* This is for a breakpoint or a watchpoint. */
struct breakpoint
-{
- struct breakpoint *next;
- /* Type of breakpoint. */
- enum bptype type;
- /* Zero means disabled; remember the info but don't break here. */
- enum enable enable;
- /* What to do with this breakpoint after we hit it. */
- enum bpdisp disposition;
- /* Number assigned to distinguish breakpoints. */
- int number;
-
- /* Address to break at, or NULL if not a breakpoint. */
- CORE_ADDR address;
-
- /* Line number of this address. Only matters if address is
- non-NULL. */
-
- int line_number;
-
- /* Source file name of this address. Only matters if address is
- non-NULL. */
-
- char *source_file;
-
- /* Non-zero means a silent breakpoint (don't print frame info
- if we stop here). */
- unsigned char silent;
- /* Number of stops at this breakpoint that should
- be continued automatically before really stopping. */
- int ignore_count;
- /* "Real" contents of byte where breakpoint has been inserted.
- Valid only when breakpoints are in the program. Under the complete
- control of the target insert_breakpoint and remove_breakpoint routines.
- No other code should assume anything about the value(s) here. */
- char shadow_contents[BREAKPOINT_MAX];
- /* Nonzero if this breakpoint is now inserted. Only matters if address
- is non-NULL. */
- char inserted;
- /* Nonzero if this is not the first breakpoint in the list
- for the given address. Only matters if address is non-NULL. */
- char duplicate;
- /* Chain of command lines to execute when this breakpoint is hit. */
- struct command_line *commands;
- /* Stack depth (address of frame). If nonzero, break only if fp
- equals this. */
- FRAME_ADDR frame;
- /* Conditional. Break only if this expression's value is nonzero. */
- struct expression *cond;
-
- /* String we used to set the breakpoint (malloc'd). Only matters if
- address is non-NULL. */
- char *addr_string;
- /* String form of the breakpoint condition (malloc'd), or NULL if there
- is no condition. */
- char *cond_string;
- /* String form of exp (malloc'd), or NULL if none. */
- char *exp_string;
-
- /* The expression we are watching, or NULL if not a watchpoint. */
- struct expression *exp;
- /* The largest block within which it is valid, or NULL if it is
- valid anywhere (e.g. consists just of global symbols). */
- struct block *exp_valid_block;
- /* Value of the watchpoint the last time we checked it. */
- value val;
-};
+ {
+ struct breakpoint *next;
+ /* Type of breakpoint. */
+ enum bptype type;
+ /* Zero means disabled; remember the info but don't break here. */
+ enum enable_state enable_state;
+ /* What to do with this breakpoint after we hit it. */
+ enum bpdisp disposition;
+ /* Number assigned to distinguish breakpoints. */
+ int number;
+
+ /* Location(s) associated with this high-level breakpoint. */
+ struct bp_location *loc;
+
+ /* Line number of this address. */
+
+ int line_number;
+
+ /* Source file name of this address. */
+
+ char *source_file;
+
+ /* Non-zero means a silent breakpoint (don't print frame info
+ if we stop here). */
+ unsigned char silent;
+ /* Number of stops at this breakpoint that should
+ be continued automatically before really stopping. */
+ int ignore_count;
+ /* Chain of command lines to execute when this breakpoint is hit. */
+ struct command_line *commands;
+ /* Stack depth (address of frame). If nonzero, break only if fp
+ equals this. */
+ struct frame_id frame_id;
+ /* Conditional. Break only if this expression's value is nonzero. */
+ struct expression *cond;
+
+ /* String we used to set the breakpoint (malloc'd). */
+ char *addr_string;
+ /* Language we used to set the breakpoint. */
+ enum language language;
+ /* Input radix we used to set the breakpoint. */
+ int input_radix;
+ /* String form of the breakpoint condition (malloc'd), or NULL if there
+ is no condition. */
+ char *cond_string;
+ /* String form of exp (malloc'd), or NULL if none. */
+ char *exp_string;
+
+ /* The expression we are watching, or NULL if not a watchpoint. */
+ struct expression *exp;
+ /* The largest block within which it is valid, or NULL if it is
+ valid anywhere (e.g. consists just of global symbols). */
+ struct block *exp_valid_block;
+ /* Value of the watchpoint the last time we checked it. */
+ struct value *val;
+
+ /* Holds the value chain for a hardware watchpoint expression. */
+ struct value *val_chain;
+
+ /* 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). */
+ struct breakpoint *related_breakpoint;
+
+ /* 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;
+
+ /* Thread number for thread-specific breakpoint, or -1 if don't care */
+ int thread;
+
+ /* 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;
+
+ /* Filename of a dynamically-linked library (dll), used for
+ bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
+ library is significant. */
+ char *dll_pathname;
+
+ /* Filename of a dll whose state change (e.g., load or unload)
+ triggered this catchpoint. This field is only valid immediately
+ after this catchpoint has triggered. */
+ char *triggered_dll_pathname;
+
+ /* Process id of a child process whose forking triggered this
+ catchpoint. This field is only valid immediately after this
+ catchpoint has triggered. */
+ int forked_inferior_pid;
+
+ /* Filename of a program whose exec triggered this catchpoint.
+ This field is only valid immediately after this catchpoint has
+ triggered. */
+ char *exec_pathname;
+
+ /* Methods associated with this breakpoint. */
+ struct breakpoint_ops *ops;
+
+ /* Was breakpoint issued from a tty? Saved for the use of pending breakpoints. */
+ int from_tty;
+
+ /* Flag value for pending breakpoint.
+ first bit : 0 non-temporary, 1 temporary.
+ second bit : 0 normal breakpoint, 1 hardware breakpoint. */
+ int flag;
+
+ /* Is breakpoint pending on shlib loads? */
+ int pending;
+ };
\f
-/* 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. */
+/* 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 bpstat *bpstat;
+typedef struct bpstats *bpstat;
/* Interface: */
/* Clear a bpstat so that it says we are not at any breakpoint.
Also free any storage that is part of a bpstat. */
-extern void bpstat_clear PARAMS ((bpstat *));
+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 PARAMS ((bpstat));
+extern bpstat bpstat_copy (bpstat);
-/* Get a bpstat associated with having just stopped at address *PC
- and frame address FRAME_ADDRESS. Update *PC to point at the
- breakpoint (if we hit a breakpoint). */
-/* FIXME: prototypes uses equivalence between FRAME_ADDR and CORE_ADDR */
-extern bpstat bpstat_stop_status PARAMS ((CORE_ADDR *, CORE_ADDR));
+extern bpstat bpstat_stop_status (CORE_ADDR pc, ptid_t ptid,
+ int stopped_by_watchpoint);
\f
/* This bpstat_what stuff tells wait_for_inferior what to do with a
breakpoint (a challenging task). */
-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,
-
- /* 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,
-
- /* 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 longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
- BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
-
- /* This is just used to keep track of how many enums there are. */
- BPSTAT_WHAT_LAST
-};
-
-struct bpstat_what {
- enum bpstat_what_main_action main_action : 4;
-
- /* Did we hit the step resume breakpoint? This is separate from the
- main_action to allow for it to be combined with any of the main
- actions. */
- unsigned int step_resume : 1;
-
- /* 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). */
- unsigned int call_dummy : 1;
-};
+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,
+
+ /* 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,
+
+ /* 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 longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
+ BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
+
+ /* Clear step resume breakpoint, and keep checking. */
+ BPSTAT_WHAT_STEP_RESUME,
+
+ /* Clear through_sigtramp breakpoint, muck with trap_expected, and keep
+ checking. */
+ BPSTAT_WHAT_THROUGH_SIGTRAMP,
+
+ /* Check the dynamic linker's data structures for new libraries, then
+ keep checking. */
+ BPSTAT_WHAT_CHECK_SHLIBS,
+
+ /* Check the dynamic linker's data structures for new libraries, then
+ resume out of the dynamic linker's callback, stop and print. */
+ BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK,
+
+ /* This is just used to keep track of how many enums there are. */
+ BPSTAT_WHAT_LAST
+ };
+
+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). */
+ 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 PARAMS ((bpstat));
+struct bpstat_what bpstat_what (bpstat);
\f
/* Find the bpstat associated with a breakpoint. NULL otherwise. */
-bpstat bpstat_find_breakpoint PARAMS ((bpstat, struct breakpoint *));
+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. */
/* 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 PARAMS ((void));
+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 int bpstat_print PARAMS ((bpstat));
+extern enum print_stop_action bpstat_print (bpstat);
/* Return 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. */
-extern int bpstat_num PARAMS ((bpstat *));
+extern int bpstat_num (bpstat *);
/* 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 PARAMS ((bpstat *));
+extern void bpstat_do_actions (bpstat *);
/* Modify BS so that the actions will not be performed. */
-extern void bpstat_clear_actions PARAMS ((bpstat));
+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: */
-struct bpstat
-{
- /* 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. */
- 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;
-
- /* Function called by bpstat_print to print stuff associated with
- this element of the bpstat chain. Returns 0 or 1 just like
- bpstat_print, or -1 if it can't deal with it. */
- int (*print_it) PARAMS((bpstat bs));
-};
+
+/* 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
+ };
\f
+
/* Prototypes for breakpoint-related functions. */
-#ifdef __STDC__ /* Forward declarations for prototypes */
-struct frame_info;
-#endif
+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
-breakpoint_here_p PARAMS ((CORE_ADDR));
+extern int insert_breakpoints (void);
-extern void
-until_break_command PARAMS ((char *, int));
+extern int remove_breakpoints (void);
-extern void
-breakpoint_re_set PARAMS ((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);
-extern void
-clear_momentary_breakpoints PARAMS ((void));
+/* This function can be used to update the breakpoint package's state
+ after an exec() system call has been executed.
-/* FIXME: Prototype uses equivalence of "struct frame_info *" and FRAME */
-extern struct breakpoint *
-set_momentary_breakpoint PARAMS ((struct symtab_and_line,
- struct frame_info *,
- enum bptype));
+ This function causes the following:
-extern void
-set_ignore_count PARAMS ((int, int, int));
+ - 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);
-extern void
-set_default_breakpoint PARAMS ((int, CORE_ADDR, struct symtab *, int));
+/* 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.
-extern void
-mark_breakpoints_out PARAMS ((void));
+ It is an error to use this function on the process whose id is
+ inferior_ptid. */
+extern int detach_breakpoints (int);
-extern void
-delete_breakpoint PARAMS ((struct breakpoint *));
+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
-breakpoint_auto_delete PARAMS ((bpstat));
+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.
-extern void
-breakpoint_clear_ignore_counts PARAMS ((void));
+ The intended client of these functions is call_function_by_hand.
-extern void
-break_command PARAMS ((char *, int));
+ The inferior must be stopped, and all breakpoints removed, when
+ these functions are used.
-extern int
-insert_breakpoints PARAMS ((void));
+ 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.
-extern int
-remove_breakpoints PARAMS ((void));
+ 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_longjmp_breakpoint PARAMS ((void));
+extern void enable_watchpoints_after_interactive_call_stop (void);
-extern void
-disable_longjmp_breakpoint PARAMS ((void));
-extern void
-set_longjmp_resume_breakpoint PARAMS ((CORE_ADDR, FRAME));
-
+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 PARAMS ((void));
+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);
-extern void
-do_displays PARAMS ((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 *);
-extern void
-disable_display PARAMS ((int));
+/* Indicator of whether exception catchpoints should be nuked between
+ runs of a program. */
+extern int deprecated_exception_catchpoints_are_fragile;
-extern void
-clear_displays PARAMS ((void));
+/* 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) */
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