/* 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) 1992-2016 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 get_number_or_range_state;
+struct gdbpy_breakpoint_object;
+struct gdbscm_breakpoint_object;
+struct number_or_range_parser;
struct thread_info;
struct bpstats;
struct bp_location;
+struct linespec_result;
+struct linespec_sals;
+struct event_location;
+
+/* Why are we removing the breakpoint from the target? */
+
+enum remove_bp_reason
+{
+ /* A regular remove. Remove the breakpoint and forget everything
+ about it. */
+ REMOVE_BREAKPOINT,
+
+ /* Detach the breakpoints from a fork child. */
+ DETACH_BREAKPOINT,
+};
/* 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
\f
/* Type of breakpoint. */
-/* FIXME In the future, we should fold all other breakpoint-like
- things into 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_none = 0, /* Eventpoint has been deleted */
bp_breakpoint, /* Normal breakpoint */
bp_hardware_breakpoint, /* Hardware assisted breakpoint */
+ bp_single_step, /* Software single-step */
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() */
+ /* 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,
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,
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
- instruction on top of it, or restore its
- value. Step over it using the
- architecture's SKIP_INSN macro. */
};
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
/* Address space at which the breakpoint was placed. */
struct address_space *placed_address_space;
- /* Address at which the breakpoint was placed. This is normally the
- same as ADDRESS from the bp_location, except when adjustment
- happens in gdbarch_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. */
+ /* Address at which the breakpoint was placed. This is normally
+ the same as REQUESTED_ADDRESS, except when adjustment happens in
+ gdbarch_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;
+ /* Address at which the breakpoint was requested. */
+ CORE_ADDR reqstd_address;
+
/* If this is a ranged breakpoint, then this field contains the
length of the range that will be watched for execution. */
int length;
/* The length of the data cached in SHADOW_CONTENTS. */
int shadow_len;
- /* The size of the placed breakpoint, according to
- gdbarch_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;
+ /* The breakpoint's kind. It is used in 'kind' parameter in Z
+ packets. */
+ int kind;
+
+ /* 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
different for different locations. Only valid for real
breakpoints; a watchpoint's conditional expression is stored in
the owner breakpoint object. */
- struct expression *cond;
+ expression_up 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
/* Nonzero if this breakpoint is now inserted. */
char inserted;
+ /* Nonzero if this is a permanent breakpoint. 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
+ gdbarch_skip_permanent_breakpoint method. */
+ char permanent;
+
/* 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
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;
+};
+
+/* The possible return values for print_bpstat, print_it_normal,
+ print_it_done, print_it_noop. */
+enum print_stop_action
+{
+ /* We printed nothing or we need to do some more analysis. */
+ PRINT_UNKNOWN = -1,
+
+ /* 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
};
/* This structure is a collection of function pointers that, if available,
with the "insert" method above. Return 0 for success, 1 if the
breakpoint, watchpoint or catchpoint type is not supported,
-1 for failure. */
- int (*remove_location) (struct bp_location *);
+ int (*remove_location) (struct bp_location *, enum remove_bp_reason reason);
/* Return true if it the target has stopped due to hitting
breakpoint location BL. This function does not check if we
- should stop, only if BL explains the stop. */
- int (*breakpoint_hit) (const struct bp_location *bl, struct address_space *,
- CORE_ADDR);
+ 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. */
/* Print to FP the CLI command that recreates this breakpoint. */
void (*print_recreate) (struct breakpoint *, struct ui_file *fp);
+
+ /* Create SALs from location, storing the result in linespec_result.
+
+ For an explanation about the arguments, see the function
+ `create_sals_from_location_default'.
+
+ This function is called inside `create_breakpoint'. */
+ void (*create_sals_from_location) (const struct event_location *location,
+ struct linespec_result *canonical,
+ enum bptype type_wanted);
+
+ /* This method will be responsible for creating a breakpoint given its SALs.
+ Usually, it just calls `create_breakpoints_sal' (for ordinary
+ breakpoints). However, there may be some special cases where we might
+ need to do some tweaks, e.g., see
+ `strace_marker_create_breakpoints_sal'.
+
+ This function is called inside `create_breakpoint'. */
+ void (*create_breakpoints_sal) (struct gdbarch *,
+ struct linespec_result *,
+ char *, char *,
+ enum bptype, enum bpdisp, int, int,
+ int, const struct breakpoint_ops *,
+ int, int, int, unsigned);
+
+ /* Given the location (second parameter), this method decodes it and
+ provides the SAL locations related to it. For ordinary
+ breakpoints, it calls `decode_line_full'. If SEARCH_PSPACE is
+ not NULL, symbol search is restricted to just that program space.
+
+ This function is called inside `location_to_sals'. */
+ void (*decode_location) (struct breakpoint *b,
+ const struct event_location *location,
+ struct program_space *search_pspace,
+ struct symtabs_and_lines *sals);
+
+ /* Return true if this breakpoint explains a signal. See
+ bpstat_explains_signal. */
+ int (*explains_signal) (struct breakpoint *, enum gdb_signal);
+
+ /* Called after evaluating the breakpoint's condition,
+ and only if it evaluated true. */
+ void (*after_condition_true) (struct bpstats *bs);
};
+/* Helper for breakpoint_ops->print_recreate implementations. Prints
+ the "thread" or "task" condition of B, and then a newline.
+
+ Necessary because most breakpoint implementations accept
+ thread/task conditions at the end of the spec line, like "break foo
+ thread 1", which needs outputting before any breakpoint-type
+ specific extra command necessary for B's recreation. */
+extern void print_recreate_thread (struct breakpoint *b, struct ui_file *fp);
+
enum watchpoint_triggered
{
/* This watchpoint definitely did not trigger. */
watch_triggered_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;
/* 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;
+ /* Location we used to set the breakpoint (malloc'd). */
+ struct event_location *location;
+
+ /* The filter that should be passed to decode_line_full when
+ re-setting this breakpoint. This may be NULL, but otherwise is
+ allocated with xmalloc. */
+ char *filter;
- /* For a ranged breakpoint, the string we used to find
+ /* For a ranged breakpoint, the location we used to find
the end of the range (malloc'd). */
- char *addr_string_range_end;
+ struct event_location *location_range_end;
/* Architecture we used to set the breakpoint. */
struct gdbarch *gdbarch;
/* 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;
- /* 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;
+ /* With a Python scripting enabled GDB, store a reference to the
+ Python object that has been associated with this breakpoint.
+ This is always NULL for a GDB that is not script enabled. It
+ can sometimes be NULL for enabled GDBs as not all breakpoint
+ types are tracked by the scripting language API. */
+ struct gdbpy_breakpoint_object *py_bp_object;
- /* Number of times this tracepoint should be hit before
- disabling/ending. */
- int pass_count;
+ /* Same as py_bp_object, but for Scheme. */
+ struct gdbscm_breakpoint_object *scm_bp_object;
+ };
- /* The number of the tracepoint on the target. */
- int number_on_target;
+/* 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. */
- /* The static tracepoint marker id, if known. */
- char *static_trace_marker_id;
+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. */
+ expression_up exp;
+ /* The largest block within which it is valid, or NULL if it is
+ valid anywhere (e.g. consists just of global symbols). */
+ const struct block *exp_valid_block;
+ /* The conditional expression if any. */
+ expression_up cond_exp;
+ /* The largest block within which it is valid, or NULL if it is
+ valid anywhere (e.g. consists just of global symbols). */
+ const struct block *cond_exp_valid_block;
+ /* Value of the watchpoint the last time we checked it, or NULL when
+ we do not know the value yet or the value was not readable. VAL
+ is never lazy. */
+ struct value *val;
+ /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
+ then an error occurred reading the value. */
+ int val_valid;
+
+ /* When watching the location of a bitfield, contains the offset and size of
+ the bitfield. Otherwise contains 0. */
+ int val_bitpos;
+ int val_bitsize;
+
+ /* Holds the frame address which identifies the frame this
+ watchpoint should be evaluated in, or `null' if the watchpoint
+ should be evaluated on the outermost frame. */
+ struct frame_id watchpoint_frame;
+
+ /* Holds the thread which identifies the frame this watchpoint
+ should be considered in scope for, or `null_ptid' if the
+ watchpoint should be evaluated in all threads. */
+ ptid_t watchpoint_thread;
+
+ /* For hardware watchpoints, the triggered status according to the
+ hardware. */
+ enum watchpoint_triggered watchpoint_triggered;
+
+ /* Whether this watchpoint is exact (see
+ target_exact_watchpoints). */
+ int exact;
+
+ /* The mask address for a masked hardware watchpoint. */
+ CORE_ADDR hw_wp_mask;
+};
- /* 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;
+/* Given a function FUNC (struct breakpoint *B, void *DATA) and
+ USER_DATA, call FUNC for every known breakpoint passing USER_DATA
+ as argument.
- /* 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;
+ If FUNC returns 1, the loop stops and the current
+ 'struct breakpoint' being processed is returned. If FUNC returns
+ zero, the loop continues.
- /* Whether this watchpoint is exact (see target_exact_watchpoints). */
- int exact;
+ This function returns either a 'struct breakpoint' pointer or NULL.
+ It was based on BFD's bfd_sections_find_if function. */
- /* The mask address for a masked hardware watchpoint. */
- CORE_ADDR hw_wp_mask;
- };
+extern struct breakpoint *breakpoint_find_if
+ (int (*func) (struct breakpoint *b, void *d), void *user_data);
+
+/* Return true if BPT is either a software breakpoint or a hardware
+ breakpoint. */
+
+extern int is_breakpoint (const struct breakpoint *bpt);
+
+/* Returns true if BPT is really a watchpoint. */
+
+extern int is_watchpoint (const struct breakpoint *bpt);
+
+/* An instance of this type is used to represent all kinds of
+ tracepoints. 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);
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).
int is_longjmp;
};
-/* The possible return values for print_bpstat, print_it_normal,
- print_it_done, print_it_noop. */
-enum print_stop_action
- {
- /* We printed nothing or we need to do some more analysis. */
- PRINT_UNKNOWN = -1,
-
- /* 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
- };
-
/* Tell what to do about this bpstat. */
struct bpstat_what bpstat_what (bpstat);
-\f
+
+/* Run breakpoint event callbacks associated with the breakpoints that
+ triggered. */
+extern void bpstat_run_callbacks (bpstat bs_head);
+
/* Find the bpstat associated with a breakpoint. NULL otherwise. */
bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *);
-/* Nonzero if a signal that we got in 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;
/* Prototypes for breakpoint-related functions. */
+/* Return 1 if there's a program/permanent breakpoint planted in
+ memory at ADDRESS, return 0 otherwise. */
+
+extern int program_breakpoint_here_p (struct gdbarch *gdbarch, CORE_ADDR address);
+
extern enum breakpoint_here breakpoint_here_p (struct address_space *,
CORE_ADDR);
+/* Return true if an enabled breakpoint exists in the range defined by
+ ADDR and LEN, in ASPACE. */
+extern int breakpoint_in_range_p (struct address_space *aspace,
+ CORE_ADDR addr, ULONGEST len);
+
extern int moribund_breakpoint_here_p (struct address_space *, CORE_ADDR);
extern int breakpoint_inserted_here_p (struct address_space *, CORE_ADDR);
extern int software_breakpoint_inserted_here_p (struct address_space *,
CORE_ADDR);
+/* Return non-zero iff there is a hardware breakpoint inserted at
+ PC. */
+extern int hardware_breakpoint_inserted_here_p (struct address_space *,
+ CORE_ADDR);
+
+/* Check whether any location of BP is inserted at PC. */
+
+extern int breakpoint_has_location_inserted_here (struct breakpoint *bp,
+ struct address_space *aspace,
+ CORE_ADDR pc);
+
+extern int single_step_breakpoint_inserted_here_p (struct address_space *,
+ CORE_ADDR);
+
/* Returns true if there's a hardware watchpoint or access watchpoint
inserted in the range defined by ADDR and LEN. */
extern int hardware_watchpoint_inserted_in_range (struct address_space *,
CORE_ADDR addr,
ULONGEST len);
-extern int breakpoint_thread_match (struct address_space *,
- CORE_ADDR, ptid_t);
+/* Returns true if {ASPACE1,ADDR1} and {ASPACE2,ADDR2} represent the
+ same breakpoint location. In most targets, this can only be true
+ if ASPACE1 matches ASPACE2. On targets that have global
+ breakpoints, the address space doesn't really matter. */
+
+extern int breakpoint_address_match (struct address_space *aspace1,
+ CORE_ADDR addr1,
+ struct address_space *aspace2,
+ CORE_ADDR addr2);
extern void until_break_command (char *, int, int);
struct breakpoint *owner);
extern void update_breakpoint_locations (struct breakpoint *b,
+ struct program_space *filter_pspace,
struct symtabs_and_lines sals,
struct symtabs_and_lines sals_end);
extern void 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);
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);
extern void
add_catch_command (char *name, char *docstring,
- void (*sfunc) (char *args, int from_tty,
- struct cmd_list_element *command),
- char **(*completer) (struct cmd_list_element *cmd,
- char *text, char *word),
+ cmd_sfunc_ftype *sfunc,
+ completer_ftype *completer,
void *user_data_catch,
void *user_data_tcatch);
struct gdbarch *gdbarch,
struct symtab_and_line sal,
char *addr_string,
- struct breakpoint_ops *ops,
+ 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. */
+ 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 (struct breakpoint *b);
+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,
+/* Set a breakpoint. This function is shared between CLI and MI functions
+ for setting a breakpoint at LOCATION.
+
+ This function has two major modes of operations, selected by the
+ PARSE_EXTRA parameter.
+
+ If PARSE_EXTRA is zero, LOCATION is just the breakpoint's location,
+ with condition, thread, and extra string specified by the COND_STRING,
+ THREAD, and EXTRA_STRING parameters.
+
+ If PARSE_EXTRA is non-zero, this function will attempt to extract
+ the condition, thread, and extra string from EXTRA_STRING, ignoring
+ the similarly named parameters.
+
+ If INTERNAL is non-zero, the breakpoint number will be allocated
+ from the internal breakpoint count.
+
+ Returns true if any breakpoint was created; false otherwise. */
+
+extern int create_breakpoint (struct gdbarch *gdbarch,
+ const struct event_location *location,
char *cond_string, int thread,
- int parse_condition_and_thread,
+ char *extra_string,
+ int parse_extra,
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 (struct thread_info *tp);
+
extern void enable_overlay_breakpoints (void);
extern void disable_overlay_breakpoints (void);
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);
+ (const char *arg, struct command_line *cmd);
extern void clear_breakpoint_hit_counts (void);
/* Clear the "inserted" flag in all breakpoints. */
extern void mark_breakpoints_out (void);
-extern void make_breakpoint_permanent (struct breakpoint *);
-
extern struct breakpoint *create_jit_event_breakpoint (struct gdbarch *,
CORE_ADDR);
extern struct breakpoint *create_solib_event_breakpoint (struct gdbarch *,
CORE_ADDR);
+/* Create an solib event breakpoint at ADDRESS in the current program
+ space, and immediately try to insert it. Returns a pointer to the
+ breakpoint on success. Deletes the new breakpoint and returns NULL
+ if inserting the breakpoint fails. */
+extern struct breakpoint *create_and_insert_solib_event_breakpoint
+ (struct gdbarch *gdbarch, CORE_ADDR address);
+
extern struct breakpoint *create_thread_event_breakpoint (struct gdbarch *,
CORE_ADDR);
extern void remove_solib_event_breakpoints (void);
-extern void remove_thread_event_breakpoints (void);
+/* Mark solib event breakpoints of the current program space with
+ delete at next stop disposition. */
+extern void remove_solib_event_breakpoints_at_next_stop (void);
extern void disable_breakpoints_in_shlibs (void);
/* This function returns TRUE if ep is a catchpoint. */
-extern int 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);
-/* Manage a software single step breakpoint (or two). Insert may be
- called twice before remove is called. */
+/* Create and insert a new software single step breakpoint for the
+ current thread. May be called multiple times; each time will add a
+ new location to the set of potential addresses the next instruction
+ is at. */
extern void insert_single_step_breakpoint (struct gdbarch *,
struct address_space *,
CORE_ADDR);
-extern int single_step_breakpoints_inserted (void);
-extern void remove_single_step_breakpoints (void);
-extern void cancel_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 (struct gdbarch *,
- struct address_space *,
- CORE_ADDR);
-extern int deprecated_remove_raw_breakpoint (struct gdbarch *, void *);
+
+/* Insert all software single step breakpoints for the current frame.
+ Return true if any software single step breakpoints are inserted,
+ otherwise, return false. */
+extern int insert_single_step_breakpoints (struct gdbarch *);
/* Check if any hardware watchpoints have triggered, according to the
target. */
int watchpoints_triggered (struct target_waitstatus *);
-/* 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);
+
+/* Return true if breakpoints should be inserted now. That'll be the
+ case if either:
+
+ - the target has global breakpoints.
-extern int breakpoints_always_inserted_mode (void);
+ - "breakpoint always-inserted" is on, and the target has
+ execution.
+
+ - threads are executing.
+*/
+extern int breakpoints_should_be_inserted_now (void);
/* Called each time new event from target is processed.
Retires previously deleted breakpoint locations that
extern void breakpoint_retire_moribund (void);
/* Set break condition of breakpoint B to EXP. */
-extern void set_breakpoint_condition (struct breakpoint *b, char *exp,
+extern void set_breakpoint_condition (struct breakpoint *b, const char *exp,
int from_tty);
/* Checks if we are catching syscalls or not.
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,
- struct get_number_or_range_state *state,
- int optional_p);
+extern struct tracepoint *
+ get_tracepoint_by_number (char **arg,
+ number_or_range_parser *parser);
/* Return a vector of all tracepoints currently defined. The vector
is newly allocated; the caller should free when done with it. */
extern struct breakpoint *iterate_over_breakpoints (int (*) (struct breakpoint *,
void *), void *);
+/* Nonzero if the specified PC cannot be a location where functions
+ have been inlined. */
+
+extern int pc_at_non_inline_function (struct address_space *aspace,
+ CORE_ADDR pc,
+ const struct target_waitstatus *ws);
+
extern int user_breakpoint_p (struct breakpoint *);
+/* Return true if this breakpoint is pending, false if not. */
+extern int pending_breakpoint_p (struct breakpoint *);
+
+/* Attempt to determine architecture of location identified by SAL. */
+extern struct gdbarch *get_sal_arch (struct symtab_and_line sal);
+
+extern void breakpoint_free_objfile (struct objfile *objfile);
+
+extern char *ep_parse_optional_if_clause (char **arg);
+
+/* Print the "Thread ID hit" part of "Thread ID hit Breakpoint N" to
+ UIOUT iff debugging multiple threads. */
+extern void maybe_print_thread_hit_breakpoint (struct ui_out *uiout);
+
#endif /* !defined (BREAKPOINT_H) */
projects / deliverable / binutils-gdb.git / blobdiff