#define MAX_BREAKPOINT_LEN 8
/* GDB will never try to install multiple breakpoints at the same
- address. But, we need to keep track of internal breakpoints too,
- and so we do need to be able to install multiple breakpoints at the
- same address transparently. We keep track of two different, and
- closely related structures. A raw breakpoint, which manages the
- low level, close to the metal aspect of a breakpoint. It holds the
- breakpoint address, and a buffer holding a copy of the instructions
+ address. However, we can see GDB requesting to insert a breakpoint
+ at an address is had already inserted one previously in a few
+ situations.
+
+ - The RSP documentation on Z packets says that to avoid potential
+ problems with duplicate packets, the operations should be
+ implemented in an idempotent way.
+
+ - A breakpoint is set at ADDR, an address in a shared library.
+ Then the shared library is unloaded. And then another, unrelated,
+ breakpoint at ADDR is set. There is not breakpoint removal request
+ between the first and the second breakpoint.
+
+ - When GDB wants to update the target-side breakpoint conditions or
+ commands, it re-inserts the breakpoint, with updated
+ conditions/commands associated.
+
+ Also, we need to keep track of internal breakpoints too, so we do
+ need to be able to install multiple breakpoints at the same address
+ transparently.
+
+ We keep track of two different, and closely related structures. A
+ raw breakpoint, which manages the low level, close to the metal
+ aspect of a breakpoint. It holds the breakpoint address, and for
+ software breakpoints, a buffer holding a copy of the instructions
that would be in memory had not been a breakpoint there (we call
that the shadow memory of the breakpoint). We occasionally need to
temporarilly uninsert a breakpoint without the client knowing about
{
struct raw_breakpoint *next;
+ /* The low level type of the breakpoint (software breakpoint,
+ watchpoint, etc.) */
+ enum raw_bkpt_type raw_type;
+
/* A reference count. Each high level breakpoint referencing this
raw breakpoint accounts for one reference. */
int refcount;
breakpoint for a given PC. */
CORE_ADDR pc;
+ /* The breakpoint's size. */
+ int size;
+
/* The breakpoint's shadow memory. */
unsigned char old_data[MAX_BREAKPOINT_LEN];
- /* Non-zero if this breakpoint is currently inserted in the
- inferior. */
+ /* Positive if this breakpoint is currently inserted in the
+ inferior. Negative if it was, but we've detected that it's now
+ gone. Zero if not inserted. */
int inserted;
-
- /* Non-zero if this breakpoint is currently disabled because we no
- longer detect it as inserted. */
- int shlib_disabled;
};
/* The type of a breakpoint. */
enum bkpt_type
{
/* A GDB breakpoint, requested with a Z0 packet. */
- gdb_breakpoint,
+ gdb_breakpoint_Z0,
+
+ /* A GDB hardware breakpoint, requested with a Z1 packet. */
+ gdb_breakpoint_Z1,
+
+ /* A GDB write watchpoint, requested with a Z2 packet. */
+ gdb_breakpoint_Z2,
+
+ /* A GDB read watchpoint, requested with a Z3 packet. */
+ gdb_breakpoint_Z3,
+
+ /* A GDB access watchpoint, requested with a Z4 packet. */
+ gdb_breakpoint_Z4,
/* A basic-software-single-step breakpoint. */
reinsert_breakpoint,
int (*handler) (CORE_ADDR);
};
+/* See mem-break.h. */
+
enum target_hw_bp_type
-Z_packet_to_target_hw_bp_type (char type)
+raw_bkpt_type_to_target_hw_bp_type (enum raw_bkpt_type raw_type)
{
- switch (type)
+ switch (raw_type)
{
- case Z_PACKET_HW_BP:
+ case raw_bkpt_type_hw:
return hw_execute;
- case Z_PACKET_WRITE_WP:
+ case raw_bkpt_type_write_wp:
return hw_write;
- case Z_PACKET_READ_WP:
+ case raw_bkpt_type_read_wp:
return hw_read;
- case Z_PACKET_ACCESS_WP:
+ case raw_bkpt_type_access_wp:
return hw_access;
default:
- fatal ("bad watchpoint type %c", type);
+ fatal ("bad raw breakpoing type %d", (int) raw_type);
+ }
+}
+
+/* See mem-break.h. */
+
+static enum bkpt_type
+Z_packet_to_bkpt_type (char z_type)
+{
+ gdb_assert ('0' <= z_type && z_type <= '4');
+
+ return gdb_breakpoint_Z0 + (z_type - '0');
+}
+
+/* See mem-break.h. */
+
+enum raw_bkpt_type
+Z_packet_to_raw_bkpt_type (char z_type)
+{
+ switch (z_type)
+ {
+ case Z_PACKET_SW_BP:
+ return raw_bkpt_type_sw;
+ case Z_PACKET_HW_BP:
+ return raw_bkpt_type_hw;
+ case Z_PACKET_WRITE_WP:
+ return raw_bkpt_type_write_wp;
+ case Z_PACKET_READ_WP:
+ return raw_bkpt_type_read_wp;
+ case Z_PACKET_ACCESS_WP:
+ return raw_bkpt_type_access_wp;
+ default:
+ gdb_assert_not_reached ("unhandled Z packet type.");
}
}
return 0;
}
+/* Find low-level breakpoint of type TYPE at address ADDR that is not
+ insert-disabled. Returns NULL if not found. */
+
static struct raw_breakpoint *
-find_raw_breakpoint_at (CORE_ADDR where)
+find_enabled_raw_code_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type)
{
struct process_info *proc = current_process ();
struct raw_breakpoint *bp;
for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next)
- if (bp->pc == where)
+ if (bp->pc == addr
+ && bp->raw_type == type
+ && bp->inserted >= 0)
return bp;
return NULL;
}
+/* Find low-level breakpoint of type TYPE at address ADDR. Returns
+ NULL if not found. */
+
static struct raw_breakpoint *
-set_raw_breakpoint_at (CORE_ADDR where)
+find_raw_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type, int size)
{
struct process_info *proc = current_process ();
struct raw_breakpoint *bp;
- int err;
+
+ for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next)
+ if (bp->pc == addr && bp->raw_type == type && bp->size == size)
+ return bp;
+
+ return NULL;
+}
+
+/* See mem-break.h. */
+
+int
+insert_memory_breakpoint (struct raw_breakpoint *bp)
+{
unsigned char buf[MAX_BREAKPOINT_LEN];
+ int err;
if (breakpoint_data == NULL)
- error ("Target does not support breakpoints.");
+ return 1;
- bp = find_raw_breakpoint_at (where);
- if (bp != NULL)
+ /* If the architecture treats the size field of Z packets as a
+ 'kind' field, then we'll need to be able to know which is the
+ breakpoint instruction too. */
+ if (bp->size != breakpoint_len)
{
- bp->refcount++;
- return bp;
+ if (debug_threads)
+ debug_printf ("Don't know how to insert breakpoints of size %d.\n",
+ bp->size);
+ return -1;
}
- bp = xcalloc (1, sizeof (*bp));
- bp->pc = where;
- bp->refcount = 1;
-
/* Note that there can be fast tracepoint jumps installed in the
same memory range, so to get at the original memory, we need to
use read_inferior_memory, which masks those out. */
- err = read_inferior_memory (where, buf, breakpoint_len);
+ err = read_inferior_memory (bp->pc, buf, breakpoint_len);
if (err != 0)
{
if (debug_threads)
debug_printf ("Failed to read shadow memory of"
" breakpoint at 0x%s (%s).\n",
- paddress (where), strerror (err));
- free (bp);
- return NULL;
+ paddress (bp->pc), strerror (err));
}
- memcpy (bp->old_data, buf, breakpoint_len);
+ else
+ {
+ memcpy (bp->old_data, buf, breakpoint_len);
- err = (*the_target->write_memory) (where, breakpoint_data,
- breakpoint_len);
+ err = (*the_target->write_memory) (bp->pc, breakpoint_data,
+ breakpoint_len);
+ if (err != 0)
+ {
+ if (debug_threads)
+ debug_printf ("Failed to insert breakpoint at 0x%s (%s).\n",
+ paddress (bp->pc), strerror (err));
+ }
+ }
+ return err != 0 ? -1 : 0;
+}
+
+/* See mem-break.h */
+
+int
+remove_memory_breakpoint (struct raw_breakpoint *bp)
+{
+ unsigned char buf[MAX_BREAKPOINT_LEN];
+ int err;
+
+ /* Since there can be trap breakpoints inserted in the same address
+ range, we use `write_inferior_memory', which takes care of
+ layering breakpoints on top of fast tracepoints, and on top of
+ the buffer we pass it. This works because the caller has already
+ either unlinked the breakpoint or marked it uninserted. Also
+ note that we need to pass the current shadow contents, because
+ write_inferior_memory updates any shadow memory with what we pass
+ here, and we want that to be a nop. */
+ memcpy (buf, bp->old_data, breakpoint_len);
+ err = write_inferior_memory (bp->pc, buf, breakpoint_len);
if (err != 0)
{
if (debug_threads)
- debug_printf ("Failed to insert breakpoint at 0x%s (%s).\n",
- paddress (where), strerror (err));
+ debug_printf ("Failed to uninsert raw breakpoint "
+ "at 0x%s (%s) while deleting it.\n",
+ paddress (bp->pc), strerror (err));
+ }
+ return err != 0 ? -1 : 0;
+}
+
+/* Set a RAW breakpoint of type TYPE and size SIZE at WHERE. On
+ success, a pointer to the new breakpoint is returned. On failure,
+ returns NULL and writes the error code to *ERR. */
+
+static struct raw_breakpoint *
+set_raw_breakpoint_at (enum raw_bkpt_type type, CORE_ADDR where, int size,
+ int *err)
+{
+ struct process_info *proc = current_process ();
+ struct raw_breakpoint *bp;
+
+ if (type == raw_bkpt_type_sw || type == raw_bkpt_type_hw)
+ {
+ bp = find_enabled_raw_code_breakpoint_at (where, type);
+ if (bp != NULL && bp->size != size)
+ {
+ /* A different size than previously seen. The previous
+ breakpoint must be gone then. */
+ if (debug_threads)
+ debug_printf ("Inconsistent breakpoint size? Was %d, now %d.\n",
+ bp->size, size);
+ bp->inserted = -1;
+ bp = NULL;
+ }
+ }
+ else
+ bp = find_raw_breakpoint_at (where, type, size);
+
+ if (bp != NULL)
+ {
+ bp->refcount++;
+ return bp;
+ }
+
+ bp = xcalloc (1, sizeof (*bp));
+ bp->pc = where;
+ bp->size = size;
+ bp->refcount = 1;
+ bp->raw_type = type;
+
+ *err = the_target->insert_point (bp->raw_type, bp->pc, bp->size, bp);
+ if (*err != 0)
+ {
+ if (debug_threads)
+ debug_printf ("Failed to insert breakpoint at 0x%s (%d).\n",
+ paddress (where), *err);
free (bp);
return NULL;
}
- /* Link the breakpoint in. */
bp->inserted = 1;
+ /* Link the breakpoint in. */
bp->next = proc->raw_breakpoints;
proc->raw_breakpoints = bp;
return bp;
}
}
-struct breakpoint *
-set_breakpoint_at (CORE_ADDR where, int (*handler) (CORE_ADDR))
+/* Set a high-level breakpoint of type TYPE, with low level type
+ RAW_TYPE and size SIZE, at WHERE. On success, a pointer to the new
+ breakpoint is returned. On failure, returns NULL and writes the
+ error code to *ERR. HANDLER is called when the breakpoint is hit.
+ HANDLER should return 1 if the breakpoint should be deleted, 0
+ otherwise. */
+
+static struct breakpoint *
+set_breakpoint (enum bkpt_type type, enum raw_bkpt_type raw_type,
+ CORE_ADDR where, int size,
+ int (*handler) (CORE_ADDR), int *err)
{
struct process_info *proc = current_process ();
struct breakpoint *bp;
struct raw_breakpoint *raw;
- raw = set_raw_breakpoint_at (where);
+ raw = set_raw_breakpoint_at (raw_type, where, size, err);
if (raw == NULL)
{
}
bp = xcalloc (1, sizeof (struct breakpoint));
- bp->type = other_breakpoint;
+ bp->type = type;
bp->raw = raw;
bp->handler = handler;
return bp;
}
+/* See mem-break.h */
+
+struct breakpoint *
+set_breakpoint_at (CORE_ADDR where, int (*handler) (CORE_ADDR))
+{
+ int err_ignored;
+
+ return set_breakpoint (other_breakpoint, raw_bkpt_type_sw,
+ where, breakpoint_len, handler,
+ &err_ignored);
+}
+
+
static int
delete_raw_breakpoint (struct process_info *proc, struct raw_breakpoint *todel)
{
{
if (bp == todel)
{
- if (bp->inserted)
+ if (bp->inserted > 0)
{
struct raw_breakpoint *prev_bp_link = *bp_link;
- unsigned char buf[MAX_BREAKPOINT_LEN];
*bp_link = bp->next;
- /* Since there can be trap breakpoints inserted in the
- same address range, we use `write_inferior_memory',
- which takes care of layering breakpoints on top of
- fast tracepoints, and on top of the buffer we pass
- it. This works because we've already unlinked the
- fast tracepoint jump above. Also note that we need
- to pass the current shadow contents, because
- write_inferior_memory updates any shadow memory with
- what we pass here, and we want that to be a nop. */
- memcpy (buf, bp->old_data, breakpoint_len);
- ret = write_inferior_memory (bp->pc, buf, breakpoint_len);
+ ret = the_target->remove_point (bp->raw_type, bp->pc, bp->size,
+ bp);
if (ret != 0)
{
/* Something went wrong, relink the breakpoint. */
if (debug_threads)
debug_printf ("Failed to uninsert raw breakpoint "
- "at 0x%s (%s) while deleting it.\n",
- paddress (bp->pc), strerror (ret));
+ "at 0x%s while deleting it.\n",
+ paddress (bp->pc));
return ret;
}
-
}
else
*bp_link = bp->next;
return delete_breakpoint_1 (proc, todel);
}
-/* Locate a breakpoint placed at address WHERE and return a pointer
- to its structure. */
+/* Locate a GDB breakpoint of type Z_TYPE and size SIZE placed at
+ address ADDR and return a pointer to its structure. If SIZE is -1,
+ the breakpoints' sizes are ignored. */
static struct breakpoint *
-find_gdb_breakpoint_at (CORE_ADDR where)
+find_gdb_breakpoint (char z_type, CORE_ADDR addr, int size)
{
struct process_info *proc = current_process ();
struct breakpoint *bp;
+ enum bkpt_type type = Z_packet_to_bkpt_type (z_type);
for (bp = proc->breakpoints; bp != NULL; bp = bp->next)
- if (bp->type == gdb_breakpoint && bp->raw->pc == where)
+ if (bp->type == type && bp->raw->pc == addr
+ && (size == -1 || bp->raw->size == size))
return bp;
return NULL;
}
-int
-set_gdb_breakpoint_at (CORE_ADDR where)
+static int
+z_type_supported (char z_type)
+{
+ return (z_type >= '0' && z_type <= '4'
+ && the_target->supports_z_point_type (z_type));
+}
+
+/* Create a new GDB breakpoint of type Z_TYPE at ADDR with size SIZE.
+ Returns a pointer to the newly created breakpoint on success. On
+ failure returns NULL and sets *ERR to either -1 for error, or 1 if
+ Z_TYPE breakpoints are not supported on this target. */
+
+static struct breakpoint *
+set_gdb_breakpoint_1 (char z_type, CORE_ADDR addr, int size, int *err)
{
struct breakpoint *bp;
+ enum bkpt_type type;
+ enum raw_bkpt_type raw_type;
+
+ /* If we see GDB inserting a second code breakpoint at the same
+ address, then either: GDB is updating the breakpoint's conditions
+ or commands; or, the first breakpoint must have disappeared due
+ to a shared library unload. On targets where the shared
+ libraries are handled by userspace, like SVR4, for example,
+ GDBserver can't tell if a library was loaded or unloaded. Since
+ we refcount raw breakpoints, we must be careful to make sure GDB
+ breakpoints never contribute more than one reference. if we
+ didn't do this, in case the previous breakpoint is gone due to a
+ shared library unload, we'd just increase the refcount of the
+ previous breakpoint at this address, but the trap was not planted
+ in the inferior anymore, thus the breakpoint would never be hit.
+ Note this must be careful to not create a window where
+ breakpoints are removed from the target, for non-stop, in case
+ the target can poke at memory while the program is running. */
+ if (z_type == Z_PACKET_SW_BP
+ || z_type == Z_PACKET_HW_BP)
+ {
+ bp = find_gdb_breakpoint (z_type, addr, -1);
- if (breakpoint_data == NULL)
- return 1;
+ if (bp != NULL)
+ {
+ if (bp->raw->size != size)
+ {
+ /* A different size than previously seen. The previous
+ breakpoint must be gone then. */
+ bp->raw->inserted = -1;
+ delete_breakpoint (bp);
+ bp = NULL;
+ }
+ else if (z_type == Z_PACKET_SW_BP)
+ {
+ /* Check if the breakpoint is actually gone from the
+ target, due to an solib unload, for example. Might
+ as well validate _all_ breakpoints. */
+ validate_breakpoints ();
+
+ /* Breakpoints that don't pass validation are
+ deleted. */
+ bp = find_gdb_breakpoint (z_type, addr, -1);
+ }
+ }
+ }
+ else
+ {
+ /* Data breakpoints for the same address but different size are
+ expected. GDB doesn't merge these. The backend gets to do
+ that if it wants/can. */
+ bp = find_gdb_breakpoint (z_type, addr, size);
+ }
- /* If we see GDB inserting a second breakpoint at the same address,
- then the first breakpoint must have disappeared due to a shared
- library unload. On targets where the shared libraries are
- handled by userspace, like SVR4, for example, GDBserver can't
- tell if a library was loaded or unloaded. Since we refcount
- breakpoints, if we didn't do this, we'd just increase the
- refcount of the previous breakpoint at this address, but the trap
- was not planted in the inferior anymore, thus the breakpoint
- would never be hit. */
- bp = find_gdb_breakpoint_at (where);
if (bp != NULL)
{
- delete_gdb_breakpoint_at (where);
+ /* We already know about this breakpoint, there's nothing else
+ to do - GDB's reference is already accounted for. Note that
+ whether the breakpoint inserted is left as is - we may be
+ stepping over it, for example, in which case we don't want to
+ force-reinsert it. */
+ return bp;
+ }
+
+ raw_type = Z_packet_to_raw_bkpt_type (z_type);
+ type = Z_packet_to_bkpt_type (z_type);
+ return set_breakpoint (type, raw_type, addr, size, NULL, err);
+}
+
+static int
+check_gdb_bp_preconditions (char z_type, int *err)
+{
+ /* As software/memory breakpoints work by poking at memory, we need
+ to prepare to access memory. If that operation fails, we need to
+ return error. Seeing an error, if this is the first breakpoint
+ of that type that GDB tries to insert, GDB would then assume the
+ breakpoint type is supported, but it may actually not be. So we
+ need to check whether the type is supported at all before
+ preparing to access memory. */
+ if (!z_type_supported (z_type))
+ {
+ *err = 1;
+ return 0;
+ }
+ else if (current_inferior == NULL)
+ {
+ *err = -1;
+ return 0;
+ }
+ else
+ return 1;
+}
+
+/* See mem-break.h. This is a wrapper for set_gdb_breakpoint_1 that
+ knows to prepare to access memory for Z0 breakpoints. */
- /* Might as well validate all other breakpoints. */
- validate_breakpoints ();
+struct breakpoint *
+set_gdb_breakpoint (char z_type, CORE_ADDR addr, int size, int *err)
+{
+ struct breakpoint *bp;
+
+ if (!check_gdb_bp_preconditions (z_type, err))
+ return NULL;
+
+ /* If inserting a software/memory breakpoint, need to prepare to
+ access memory. */
+ if (z_type == Z_PACKET_SW_BP)
+ {
+ *err = prepare_to_access_memory ();
+ if (*err != 0)
+ return NULL;
}
- bp = set_breakpoint_at (where, NULL);
- if (bp == NULL)
- return -1;
+ bp = set_gdb_breakpoint_1 (z_type, addr, size, err);
- bp->type = gdb_breakpoint;
- return 0;
+ if (z_type == Z_PACKET_SW_BP)
+ done_accessing_memory ();
+
+ return bp;
}
-int
-delete_gdb_breakpoint_at (CORE_ADDR addr)
+/* Delete a GDB breakpoint of type Z_TYPE and size SIZE previously
+ inserted at ADDR with set_gdb_breakpoint_at. Returns 0 on success,
+ -1 on error, and 1 if Z_TYPE breakpoints are not supported on this
+ target. */
+
+static int
+delete_gdb_breakpoint_1 (char z_type, CORE_ADDR addr, int size)
{
struct breakpoint *bp;
int err;
- if (breakpoint_data == NULL)
- return 1;
-
- bp = find_gdb_breakpoint_at (addr);
+ bp = find_gdb_breakpoint (z_type, addr, size);
if (bp == NULL)
return -1;
/* Before deleting the breakpoint, make sure to free
its condition list. */
- clear_gdb_breakpoint_conditions (addr);
+ clear_breakpoint_conditions (bp);
err = delete_breakpoint (bp);
- if (err)
+ if (err != 0)
return -1;
return 0;
}
-/* Clear all conditions associated with this breakpoint address. */
+/* See mem-break.h. This is a wrapper for delete_gdb_breakpoint that
+ knows to prepare to access memory for Z0 breakpoints. */
+
+int
+delete_gdb_breakpoint (char z_type, CORE_ADDR addr, int size)
+{
+ int ret;
+
+ if (!check_gdb_bp_preconditions (z_type, &ret))
+ return ret;
+
+ /* If inserting a software/memory breakpoint, need to prepare to
+ access memory. */
+ if (z_type == Z_PACKET_SW_BP)
+ {
+ int err;
+
+ err = prepare_to_access_memory ();
+ if (err != 0)
+ return -1;
+ }
+
+ ret = delete_gdb_breakpoint_1 (z_type, addr, size);
+
+ if (z_type == Z_PACKET_SW_BP)
+ done_accessing_memory ();
+
+ return ret;
+}
+
+/* Clear all conditions associated with a breakpoint. */
void
-clear_gdb_breakpoint_conditions (CORE_ADDR addr)
+clear_breakpoint_conditions (struct breakpoint *bp)
{
- struct breakpoint *bp = find_gdb_breakpoint_at (addr);
struct point_cond_list *cond;
- if (bp == NULL || bp->cond_list == NULL)
+ if (bp->cond_list == NULL)
return;
cond = bp->cond_list;
/* Add condition CONDITION to GDBserver's breakpoint BP. */
-void
+static void
add_condition_to_breakpoint (struct breakpoint *bp,
struct agent_expr *condition)
{
bp->cond_list = new_cond;
}
-/* Add a target-side condition CONDITION to the breakpoint at ADDR. */
+/* Add a target-side condition CONDITION to a breakpoint. */
int
-add_breakpoint_condition (CORE_ADDR addr, char **condition)
+add_breakpoint_condition (struct breakpoint *bp, char **condition)
{
- struct breakpoint *bp = find_gdb_breakpoint_at (addr);
char *actparm = *condition;
struct agent_expr *cond;
/* Evaluate condition (if any) at breakpoint BP. Return 1 if
true and 0 otherwise. */
-int
-gdb_condition_true_at_breakpoint (CORE_ADDR where)
+static int
+gdb_condition_true_at_breakpoint_z_type (char z_type, CORE_ADDR addr)
{
/* Fetch registers for the current inferior. */
- struct breakpoint *bp = find_gdb_breakpoint_at (where);
+ struct breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1);
ULONGEST value = 0;
struct point_cond_list *cl;
int err = 0;
return (value != 0);
}
+int
+gdb_condition_true_at_breakpoint (CORE_ADDR where)
+{
+ /* Only check code (software or hardware) breakpoints. */
+ return (gdb_condition_true_at_breakpoint_z_type (Z_PACKET_SW_BP, where)
+ || gdb_condition_true_at_breakpoint_z_type (Z_PACKET_HW_BP, where));
+}
+
/* Add commands COMMANDS to GDBserver's breakpoint BP. */
void
/* Add a target-side command COMMAND to the breakpoint at ADDR. */
int
-add_breakpoint_commands (CORE_ADDR addr, char **command, int persist)
+add_breakpoint_commands (struct breakpoint *bp, char **command,
+ int persist)
{
- struct breakpoint *bp = find_gdb_breakpoint_at (addr);
char *actparm = *command;
struct agent_expr *cmd;
/* Return true if there are no commands to run at this location,
which likely means we want to report back to GDB. */
-int
-gdb_no_commands_at_breakpoint (CORE_ADDR where)
+
+static int
+gdb_no_commands_at_breakpoint_z_type (char z_type, CORE_ADDR addr)
{
- struct breakpoint *bp = find_gdb_breakpoint_at (where);
+ struct breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1);
if (bp == NULL)
- return 0;
+ return 1;
if (debug_threads)
- debug_printf ("at 0x%s, bp command_list is 0x%s\n",
- paddress (where),
+ debug_printf ("at 0x%s, type Z%c, bp command_list is 0x%s\n",
+ paddress (addr), z_type,
phex_nz ((uintptr_t) bp->command_list, 0));
return (bp->command_list == NULL);
}
-void
-run_breakpoint_commands (CORE_ADDR where)
+/* Return true if there are no commands to run at this location,
+ which likely means we want to report back to GDB. */
+
+int
+gdb_no_commands_at_breakpoint (CORE_ADDR where)
+{
+ /* Only check code (software or hardware) breakpoints. */
+ return (gdb_no_commands_at_breakpoint_z_type (Z_PACKET_SW_BP, where)
+ && gdb_no_commands_at_breakpoint_z_type (Z_PACKET_HW_BP, where));
+}
+
+/* Run a breakpoint's commands. Returns 0 if there was a problem
+ running any command, 1 otherwise. */
+
+static int
+run_breakpoint_commands_z_type (char z_type, CORE_ADDR addr)
{
/* Fetch registers for the current inferior. */
- struct breakpoint *bp = find_gdb_breakpoint_at (where);
+ struct breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1);
ULONGEST value = 0;
struct point_command_list *cl;
int err = 0;
struct eval_agent_expr_context ctx;
if (bp == NULL)
- return;
+ return 1;
ctx.regcache = get_thread_regcache (current_inferior, 1);
ctx.tframe = NULL;
/* If one command has a problem, stop digging the hole deeper. */
if (err)
- break;
+ return 0;
}
+
+ return 1;
}
-/* Return 1 if there is a breakpoint inserted in address WHERE
- and if its condition, if it exists, is true. */
+void
+run_breakpoint_commands (CORE_ADDR where)
+{
+ /* Only check code (software or hardware) breakpoints. If one
+ command has a problem, stop digging the hole deeper. */
+ if (run_breakpoint_commands_z_type (Z_PACKET_SW_BP, where))
+ run_breakpoint_commands_z_type (Z_PACKET_HW_BP, where);
+}
+
+/* See mem-break.h. */
int
gdb_breakpoint_here (CORE_ADDR where)
{
- return (find_gdb_breakpoint_at (where) != NULL);
+ /* Only check code (software or hardware) breakpoints. */
+ return (find_gdb_breakpoint (Z_PACKET_SW_BP, where, -1) != NULL
+ || find_gdb_breakpoint (Z_PACKET_HW_BP, where, -1) != NULL);
}
void
static void
uninsert_raw_breakpoint (struct raw_breakpoint *bp)
{
- if (bp->inserted)
+ if (bp->inserted < 0)
+ {
+ if (debug_threads)
+ debug_printf ("Breakpoint at %s is marked insert-disabled.\n",
+ paddress (bp->pc));
+ }
+ else if (bp->inserted > 0)
{
int err;
- unsigned char buf[MAX_BREAKPOINT_LEN];
bp->inserted = 0;
- /* Since there can be fast tracepoint jumps inserted in the same
- address range, we use `write_inferior_memory', which takes
- care of layering breakpoints on top of fast tracepoints, and
- on top of the buffer we pass it. This works because we've
- already unlinked the fast tracepoint jump above. Also note
- that we need to pass the current shadow contents, because
- write_inferior_memory updates any shadow memory with what we
- pass here, and we want that to be a nop. */
- memcpy (buf, bp->old_data, breakpoint_len);
- err = write_inferior_memory (bp->pc, buf, breakpoint_len);
+
+ err = the_target->remove_point (bp->raw_type, bp->pc, bp->size, bp);
if (err != 0)
{
bp->inserted = 1;
if (debug_threads)
- debug_printf ("Failed to uninsert raw breakpoint at 0x%s (%s).\n",
- paddress (bp->pc), strerror (err));
+ debug_printf ("Failed to uninsert raw breakpoint at 0x%s.\n",
+ paddress (bp->pc));
}
}
}
void
uninsert_breakpoints_at (CORE_ADDR pc)
{
+ struct process_info *proc = current_process ();
struct raw_breakpoint *bp;
+ int found = 0;
- bp = find_raw_breakpoint_at (pc);
- if (bp == NULL)
+ for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next)
+ if ((bp->raw_type == raw_bkpt_type_sw
+ || bp->raw_type == raw_bkpt_type_hw)
+ && bp->pc == pc)
+ {
+ found = 1;
+
+ if (bp->inserted)
+ uninsert_raw_breakpoint (bp);
+ }
+
+ if (!found)
{
/* This can happen when we remove all breakpoints while handling
a step-over. */
debug_printf ("Could not find breakpoint at 0x%s "
"in list (uninserting).\n",
paddress (pc));
- return;
}
-
- if (bp->inserted)
- uninsert_raw_breakpoint (bp);
}
void
struct raw_breakpoint *bp;
for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next)
- if (bp->inserted)
+ if ((bp->raw_type == raw_bkpt_type_sw
+ || bp->raw_type == raw_bkpt_type_hw)
+ && bp->inserted)
uninsert_raw_breakpoint (bp);
}
if (bp->inserted)
error ("Breakpoint already inserted at reinsert time.");
- err = (*the_target->write_memory) (bp->pc, breakpoint_data,
- breakpoint_len);
+ err = the_target->insert_point (bp->raw_type, bp->pc, bp->size, bp);
if (err == 0)
bp->inserted = 1;
else if (debug_threads)
- debug_printf ("Failed to reinsert breakpoint at 0x%s (%s).\n",
- paddress (bp->pc), strerror (err));
+ debug_printf ("Failed to reinsert breakpoint at 0x%s (%d).\n",
+ paddress (bp->pc), err);
}
void
reinsert_breakpoints_at (CORE_ADDR pc)
{
+ struct process_info *proc = current_process ();
struct raw_breakpoint *bp;
+ int found = 0;
- bp = find_raw_breakpoint_at (pc);
- if (bp == NULL)
+ for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next)
+ if ((bp->raw_type == raw_bkpt_type_sw
+ || bp->raw_type == raw_bkpt_type_hw)
+ && bp->pc == pc)
+ {
+ found = 1;
+
+ reinsert_raw_breakpoint (bp);
+ }
+
+ if (!found)
{
/* This can happen when we remove all breakpoints while handling
a step-over. */
debug_printf ("Could not find raw breakpoint at 0x%s "
"in list (reinserting).\n",
paddress (pc));
- return;
}
-
- reinsert_raw_breakpoint (bp);
}
void
struct raw_breakpoint *bp;
for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next)
- if (!bp->inserted)
+ if ((bp->raw_type == raw_bkpt_type_sw
+ || bp->raw_type == raw_bkpt_type_hw)
+ && !bp->inserted)
reinsert_raw_breakpoint (bp);
}
while (bp)
{
- if (bp->raw->pc == stop_pc)
+ struct raw_breakpoint *raw = bp->raw;
+
+ if ((raw->raw_type == raw_bkpt_type_sw
+ || raw->raw_type == raw_bkpt_type_hw)
+ && raw->pc == stop_pc)
{
- if (!bp->raw->inserted)
+ if (!raw->inserted)
{
warning ("Hit a removed breakpoint?");
return;
int
breakpoint_here (CORE_ADDR addr)
{
- return (find_raw_breakpoint_at (addr) != NULL);
+ struct process_info *proc = current_process ();
+ struct raw_breakpoint *bp;
+
+ for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next)
+ if ((bp->raw_type == raw_bkpt_type_sw
+ || bp->raw_type == raw_bkpt_type_hw)
+ && bp->pc == addr)
+ return 1;
+
+ return 0;
}
int
breakpoint_inserted_here (CORE_ADDR addr)
{
+ struct process_info *proc = current_process ();
struct raw_breakpoint *bp;
- bp = find_raw_breakpoint_at (addr);
+ for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next)
+ if ((bp->raw_type == raw_bkpt_type_sw
+ || bp->raw_type == raw_bkpt_type_hw)
+ && bp->pc == addr
+ && bp->inserted)
+ return 1;
- return (bp != NULL && bp->inserted);
+ return 0;
}
static int
int err;
gdb_assert (bp->inserted);
+ gdb_assert (bp->raw_type == raw_bkpt_type_sw);
buf = alloca (breakpoint_len);
err = (*the_target->read_memory) (bp->pc, buf, breakpoint_len);
if (err || memcmp (buf, breakpoint_data, breakpoint_len) != 0)
{
/* Tag it as gone. */
- bp->inserted = 0;
- bp->shlib_disabled = 1;
+ bp->inserted = -1;
return 0;
}
for (bp = proc->breakpoints; bp != NULL; bp = next)
{
next = bp->next;
- if (bp->raw->shlib_disabled)
+ if (bp->raw->inserted < 0)
delete_breakpoint_1 (proc, bp);
}
}
for (bp = proc->breakpoints; bp != NULL; bp = bp->next)
{
- if (bp->raw->inserted)
- validate_inserted_breakpoint (bp->raw);
+ struct raw_breakpoint *raw = bp->raw;
+
+ if (raw->raw_type == raw_bkpt_type_sw && raw->inserted > 0)
+ validate_inserted_breakpoint (raw);
}
delete_disabled_breakpoints ();
CORE_ADDR start, end;
int copy_offset, copy_len, buf_offset;
+ if (bp->raw_type != raw_bkpt_type_sw)
+ continue;
+
gdb_assert (bp->old_data >= buf + mem_len
|| buf >= &bp->old_data[sizeof (bp->old_data)]);
copy_offset = start - bp->pc;
buf_offset = start - mem_addr;
- if (bp->inserted)
+ if (bp->inserted > 0)
{
if (validate_inserted_breakpoint (bp))
memcpy (buf + buf_offset, bp->old_data + copy_offset, copy_len);
CORE_ADDR start, end;
int copy_offset, copy_len, buf_offset;
+ if (bp->raw_type != raw_bkpt_type_sw)
+ continue;
+
gdb_assert (bp->old_data >= myaddr + mem_len
|| myaddr >= &bp->old_data[sizeof (bp->old_data)]);
buf_offset = start - mem_addr;
memcpy (bp->old_data + copy_offset, myaddr + buf_offset, copy_len);
- if (bp->inserted)
+ if (bp->inserted > 0)
{
if (validate_inserted_breakpoint (bp))
memcpy (buf + buf_offset, breakpoint_data + copy_offset, copy_len);
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