/* Data structures associated with breakpoints in GDB.
- Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
- 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 1992-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "frame.h"
#include "value.h"
#include "vec.h"
+#include "ax.h"
+#include "command.h"
+#include "break-common.h"
+#include "probe.h"
struct value;
struct block;
-struct breakpoint_object;
+struct gdbpy_breakpoint_object;
+struct gdbscm_breakpoint_object;
+struct get_number_or_range_state;
+struct thread_info;
+struct bpstats;
+struct bp_location;
+struct linespec_result;
+struct linespec_sals;
/* 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
bp_longjmp, /* secret breakpoint to find longjmp() */
bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
+ /* Breakpoint placed to the same location(s) like bp_longjmp but used to
+ protect against stale DUMMY_FRAME. Multiple bp_longjmp_call_dummy and
+ one bp_call_dummy are chained together by related_breakpoint for each
+ DUMMY_FRAME. */
+ bp_longjmp_call_dummy,
+
/* An internal breakpoint that is installed on the unwinder's
debug hook. */
bp_exception,
bp_exception_resume,
/* Used by wait_for_inferior for stepping over subroutine calls,
- for stepping over signal handlers, and for skipping
- prologues. */
+ and for skipping prologues. */
bp_step_resume,
+ /* Used by wait_for_inferior for stepping over signal
+ handlers. */
+ bp_hp_step_resume,
+
/* Used to detect when a watchpoint expression has gone out of
scope. These breakpoints are usually not visible to the user.
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)). */
+ /* The breakpoint at the end of a call dummy. See bp_longjmp_call_dummy it
+ is chained with by related_breakpoint. */
bp_call_dummy,
/* A breakpoint set on std::terminate, that is used to catch
bp_fast_tracepoint,
bp_static_tracepoint,
+ /* A dynamic printf stops at the given location, does a formatted
+ print, then automatically continues. (Although this is sort of
+ like a macro packaging up standard breakpoint functionality,
+ GDB doesn't have a way to construct types of breakpoint from
+ elements of behavior.) */
+ bp_dprintf,
+
/* Event for JIT compiled code generation or deletion. */
bp_jit_event,
+
+ /* Breakpoint is placed at the STT_GNU_IFUNC resolver. When hit GDB
+ inserts new bp_gnu_ifunc_resolver_return at the caller.
+ bp_gnu_ifunc_resolver is still being kept here as a different thread
+ may still hit it before bp_gnu_ifunc_resolver_return is hit by the
+ original thread. */
+ bp_gnu_ifunc_resolver,
+
+ /* On its hit GDB now know the resolved address of the target
+ STT_GNU_IFUNC function. Associated bp_gnu_ifunc_resolver can be
+ deleted now and the breakpoint moved to the target function entry
+ point. */
+ bp_gnu_ifunc_resolver_return,
};
/* States of enablement of breakpoint. */
automatically enabled and reset when the
call "lands" (either completes, or stops
at another eventpoint). */
- bp_startup_disabled, /* The eventpoint has been disabled during
- inferior startup. This is necessary on
- some targets where the main executable
- will get relocated during startup, making
- breakpoint addresses invalid. The
- eventpoint will be automatically enabled
- and reset once inferior startup is
- complete. */
bp_permanent /* There is a breakpoint instruction
hard-wired into the target's code. Don't
try to write another breakpoint
disp_donttouch /* Leave it alone */
};
-enum target_hw_bp_type
+/* Status of breakpoint conditions used when synchronizing
+ conditions with the target. */
+
+enum condition_status
{
- hw_write = 0, /* Common HW watchpoint */
- hw_read = 1, /* Read HW watchpoint */
- hw_access = 2, /* Access HW watchpoint */
- hw_execute = 3 /* Execute HW breakpoint */
+ condition_unchanged = 0,
+ condition_modified,
+ condition_updated
};
-
/* Information used by targets to insert and remove breakpoints. */
struct bp_target_info
is used to determine the type of breakpoint to insert. */
CORE_ADDR placed_address;
+ /* If this is a ranged breakpoint, then this field contains the
+ length of the range that will be watched for execution. */
+ int length;
+
/* 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
(e.g. if a remote stub handled the details). We may still need
the size to remove the breakpoint safely. */
int placed_size;
+
+ /* Vector of conditions the target should evaluate if it supports target-side
+ breakpoint conditions. */
+ VEC(agent_expr_p) *conditions;
+
+ /* Vector of commands the target should evaluate if it supports
+ target-side breakpoint commands. */
+ VEC(agent_expr_p) *tcommands;
+
+ /* Flag that is true if the breakpoint should be left in place even
+ when GDB is not connected. */
+ int persist;
};
/* GDB maintains two types of information about each breakpoint (or
bp_loc_other /* Miscellaneous... */
};
+/* This structure is a collection of function pointers that, if
+ available, will be called instead of performing the default action
+ for this bp_loc_type. */
+
+struct bp_location_ops
+{
+ /* Destructor. Releases everything from SELF (but not SELF
+ itself). */
+ void (*dtor) (struct bp_location *self);
+};
+
struct bp_location
{
/* Chain pointer to the next breakpoint location for
the same parent breakpoint. */
struct bp_location *next;
+ /* Methods associated with this location. */
+ const struct bp_location_ops *ops;
+
/* The reference count. */
int refc;
the owner breakpoint object. */
struct expression *cond;
+ /* Conditional expression in agent expression
+ bytecode form. This is used for stub-side breakpoint
+ condition evaluation. */
+ struct agent_expr *cond_bytecode;
+
+ /* Signals that the condition has changed since the last time
+ we updated the global location list. This means the condition
+ needs to be sent to the target again. This is used together
+ with target-side breakpoint conditions.
+
+ condition_unchanged: It means there has been no condition changes.
+
+ condition_modified: It means this location had its condition modified.
+
+ condition_updated: It means we already marked all the locations that are
+ duplicates of this location and thus we don't need to call
+ force_breakpoint_reinsertion (...) for this location. */
+
+ enum condition_status condition_changed;
+
+ struct agent_expr *cmd_bytecode;
+
+ /* Signals that breakpoint conditions and/or commands need to be
+ re-synched with the target. This has no use other than
+ target-side breakpoints. */
+ char needs_update;
+
/* This location's address is in an unloaded solib, and so this
location should not be inserted. It will be automatically
enabled when that solib is loaded. */
char inserted;
/* Nonzero if this is not the first breakpoint in the list
- for the given address. */
+ for the given address. location of tracepoint can _never_
+ be duplicated with other locations of tracepoints and other
+ kinds of breakpoints, because two locations at the same
+ address may have different actions, so both of these locations
+ should be downloaded and so that `tfind N' always works. */
char duplicate;
/* If we someday support real thread-specific breakpoints, then
CORE_ADDR address;
/* For hardware watchpoints, the size of the memory region being
- watched. */
+ watched. For hardware ranged breakpoints, the size of the
+ breakpoint range. */
int length;
/* Type of hardware watchpoint. */
processor's architectual constraints. */
CORE_ADDR requested_address;
+ /* An additional address assigned with this location. This is currently
+ only used by STT_GNU_IFUNC resolver breakpoints to hold the address
+ of the resolver function. */
+ CORE_ADDR related_address;
+
+ /* If the location comes from a probe point, this is the probe associated
+ with it. */
+ struct bound_probe probe;
+
char *function_name;
/* Details of the placed breakpoint, when inserted. */
This variable keeps a number of events still to go, when
it becomes 0 this location is retired. */
int events_till_retirement;
+
+ /* Line number which was used to place this location.
+
+ Breakpoint placed into a comment keeps it's user specified line number
+ despite ADDRESS resolves into a different line number. */
+
+ int line_number;
+
+ /* Symtab which was used to place this location. This is used
+ to find the corresponding source file name. */
+
+ struct symtab *symtab;
};
/* This structure is a collection of function pointers that, if available,
struct breakpoint_ops
{
+ /* Destructor. Releases everything from SELF (but not SELF
+ itself). */
+ void (*dtor) (struct breakpoint *self);
+
+ /* 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. */
+ 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
-1 for failure. */
int (*remove_location) (struct bp_location *);
- /* Return non-zero if the debugger should tell the user that this
- breakpoint was hit. */
- int (*breakpoint_hit) (struct breakpoint *);
+ /* 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 breakpoint *);
+ 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 address string, storing the result in linespec_result.
+
+ For an explanation about the arguments, see the function
+ `create_sals_from_address_default'.
+
+ This function is called inside `create_breakpoint'. */
+ void (*create_sals_from_address) (char **, struct linespec_result *,
+ enum bptype, char *, char **);
+
+ /* 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 address string (second parameter), this method decodes it
+ and provides the SAL locations related to it. For ordinary breakpoints,
+ it calls `decode_line_full'.
+
+ This function is called inside `addr_string_to_sals'. */
+ void (*decode_linespec) (struct breakpoint *, char **,
+ struct symtabs_and_lines *);
+
+ /* 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_yes
};
-/* This is used to declare the VEC syscalls_to_be_caught. */
-DEF_VEC_I(int);
-
typedef struct bp_location *bp_location_p;
DEF_VEC_P(bp_location_p);
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 a breakpoint or a watchpoint. */
+/* This is for all kinds of breakpoints. */
struct breakpoint
{
+ /* Methods associated with this breakpoint. */
+ const struct breakpoint_ops *ops;
+
struct breakpoint *next;
/* Type of breakpoint. */
enum bptype type;
/* 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;
+ /* Non-zero means display ADDR_STRING to the user verbatim. */
+ unsigned char display_canonical;
/* Number of stops at this breakpoint that should
be continued automatically before really stopping. */
int ignore_count;
+
+ /* Number of stops at this breakpoint before it will be
+ disabled. */
+ int enable_count;
+
/* Chain of command lines to execute when this breakpoint is
hit. */
struct counted_command_line *commands;
equals this. */
struct frame_id frame_id;
- /* The program space used to set the breakpoint. */
+ /* 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. */
struct program_space *pspace;
/* String we used to set the breakpoint (malloc'd). */
char *addr_string;
+
+ /* 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;
+
+ /* For a ranged breakpoint, the string we used to find
+ the end of the range (malloc'd). */
+ char *addr_string_range_end;
+
/* Architecture we used to set the breakpoint. */
struct gdbarch *gdbarch;
/* Language we used to set the breakpoint. */
/* String form of the breakpoint condition (malloc'd), or NULL if
there is no condition. */
char *cond_string;
- /* 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. */
- 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;
- /* The conditional expression if any. NULL if not a watchpoint. */
- struct expression *cond_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 *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;
+
+ /* String form of extra parameters, or NULL if there are none.
+ Malloc'd. */
+ char *extra_string;
/* Holds the address of the related watchpoint_scope breakpoint
when using watchpoints on local variables (might the concept of
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;
-
- /* 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;
-
/* Thread number for thread-specific breakpoint,
or -1 if don't care. */
int thread;
aborting, so you can back up to just before the abort. */
int hit_count;
- /* Process id of a child process whose forking triggered this
- catchpoint. This field is only valid immediately after this
- catchpoint has triggered. */
- ptid_t 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;
-
- /* Syscall numbers used for the 'catch syscall' feature. If no
- syscall has been specified for filtering, its value is NULL.
- Otherwise, it holds a list of all syscalls to be caught. The
- list elements are allocated with xmalloc. */
- VEC(int) *syscalls_to_be_caught;
-
- /* Methods associated with this breakpoint. */
- struct breakpoint_ops *ops;
-
/* 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;
- /* 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 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;
-
/* 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 Python scripting API. */
- struct breakpoint_object *py_bp_object;
+ types are tracked by the scripting language API. */
+ struct gdbpy_breakpoint_object *py_bp_object;
- /* Whether this watchpoint is exact (see target_exact_watchpoints). */
- int exact;
+ /* Same as py_bp_object, but for Scheme. */
+ struct gdbscm_breakpoint_object *scm_bp_object;
};
+/* An instance of this type is used to represent a watchpoint. It
+ includes a "struct breakpoint" as a kind of base class; users
+ downcast to "struct breakpoint *" when needed. */
+
+struct watchpoint
+{
+ /* The base class. */
+ struct breakpoint base;
+
+ /* 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. */
+ 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). */
+ const struct block *exp_valid_block;
+ /* The conditional expression if any. */
+ struct expression *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;
+
+ /* 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;
+};
+
+/* 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. It includes a "struct breakpoint" as a kind of base
+ class; users downcast to "struct breakpoint *" when needed. */
+
+struct tracepoint
+{
+ /* The base class. */
+ struct breakpoint base;
+
+ /* 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);
\f
extern bpstat bpstat_copy (bpstat);
extern bpstat bpstat_stop_status (struct address_space *aspace,
- CORE_ADDR pc, ptid_t ptid);
+ CORE_ADDR pc, ptid_t ptid,
+ const struct target_waitstatus *ws);
\f
/* This bpstat_what stuff tells wait_for_inferior what to do with a
breakpoint (a challenging task).
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
/* Stop and print. */
BPSTAT_WHAT_STOP_NOISY,
- /* Clear step resume breakpoint, and keep checking. */
- BPSTAT_WHAT_STEP_RESUME,
+ /* 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
print_it_done, print_it_noop. */
enum print_stop_action
{
+ /* We printed nothing or we need to do some more analysis. */
PRINT_UNKNOWN = -1,
+
+ /* We printed something, and we *do* desire that something to be
+ followed by a location. */
PRINT_SRC_AND_LOC,
+
+ /* 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
};
/* Find the bpstat associated with a breakpoint. NULL otherwise. */
bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *);
-/* 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 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);
/* 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);
+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
command loop). */
extern void bpstat_do_actions (void);
-/* Modify BS so that the actions will not be performed. */
-extern void bpstat_clear_actions (bpstat);
+/* Modify all entries of STOP_BPSTAT of INFERIOR_PTID so that the actions will
+ not be performed. */
+extern void bpstat_clear_actions (void);
/* Implementation: */
/* The associated command list. */
struct counted_command_line *commands;
- /* Commands left to be done. This points somewhere in
- base_command. */
- struct command_line *commands_left;
-
/* Old value associated with a watchpoint. */
struct value *old_val;
extern void until_break_command (char *, int, int);
+/* Initialize a struct bp_location. */
+
+extern void init_bp_location (struct bp_location *loc,
+ const struct bp_location_ops *ops,
+ struct breakpoint *owner);
+
+extern void update_breakpoint_locations (struct breakpoint *b,
+ 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 void set_ignore_count (int, int, int);
-extern void set_default_breakpoint (int, struct program_space *,
- CORE_ADDR, struct symtab *, int);
-
extern void breakpoint_init_inferior (enum inf_context);
extern struct cleanup *make_cleanup_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 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 (char *name, char *docstring,
+ void (*sfunc) (char *args, int from_tty,
+ struct cmd_list_element *command),
+ 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,
+ 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
+ };
+
extern int create_breakpoint (struct gdbarch *gdbarch, char *arg,
char *cond_string, int thread,
- int parse_condition_and_thread,
+ char *extra_string,
+ int parse_arg,
int tempflag, enum bptype wanted_type,
int ignore_count,
enum auto_boolean pending_break_support,
- struct breakpoint_ops *ops,
+ const struct breakpoint_ops *ops,
int from_tty,
int enabled,
- int internal);
+ int internal, unsigned flags);
extern void insert_breakpoints (void);
It is an error to use this function on the process whose id is
inferior_ptid. */
-extern int detach_breakpoints (int);
+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
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 (int thread);
+
extern void enable_overlay_breakpoints (void);
extern void disable_overlay_breakpoints (void);
/* These functions respectively disable or reenable all currently
enabled watchpoints. When disabled, the watchpoints are marked
- call_disabled. When reenabled, they are marked enabled.
+ call_disabled. When re-enabled, they are marked enabled.
The intended client of these functions is call_function_by_hand.
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
+ 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
extern void disable_breakpoints_in_shlibs (void);
/* This function returns TRUE if ep is a catchpoint. */
-extern int ep_is_catchpoint (struct breakpoint *);
+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 (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);
-/* 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 (struct gdbarch *,
target. */
int watchpoints_triggered (struct target_waitstatus *);
-/* Update BUF, which is LEN bytes read from the target address MEMADDR,
- by replacing any memory breakpoints with their shadowed contents. */
-void breakpoint_restore_shadows (gdb_byte *buf, ULONGEST memaddr,
- LONGEST len);
+/* 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);
extern int breakpoints_always_inserted_mode (void);
extern int catching_syscall_number (int syscall_number);
/* Return a tracepoint with the given number if found. */
-extern struct breakpoint *get_tracepoint (int num);
+extern struct tracepoint *get_tracepoint (int num);
-extern struct breakpoint *get_tracepoint_by_number_on_target (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 breakpoint *get_tracepoint_by_number (char **arg,
- int multi_p,
- int optional_p);
+extern struct tracepoint *
+ get_tracepoint_by_number (char **arg,
+ struct get_number_or_range_state *state,
+ int optional_p);
/* Return a vector of all tracepoints currently defined. The vector
is newly allocated; the caller should free when done with it. */
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 *);
-extern int get_number_or_range (char **pp);
+/* 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 char *ep_parse_optional_if_clause (char **arg);
#endif /* !defined (BREAKPOINT_H) */
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