/* Everything about syscall catchpoints, for GDB.
- Copyright (C) 2009-2016 Free Software Foundation, Inc.
+ Copyright (C) 2009-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "mi/mi-common.h"
#include "valprint.h"
#include "arch-utils.h"
-#include "observer.h"
+#include "observable.h"
#include "xml-syscall.h"
+#include "cli/cli-style.h"
/* An instance of this type is used to represent a syscall catchpoint.
- It includes a "struct breakpoint" as a kind of base class; users
- downcast to "struct breakpoint *" when needed. A breakpoint is
- really of this type iff its ops pointer points to
+ A breakpoint is really of this type iff its ops pointer points to
CATCH_SYSCALL_BREAKPOINT_OPS. */
-struct syscall_catchpoint
+struct syscall_catchpoint : public breakpoint
{
- /* The base class. */
- struct breakpoint base;
-
/* 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;
+ syscall has been specified for filtering, it is empty.
+ Otherwise, it holds a list of all syscalls to be caught. */
+ std::vector<int> syscalls_to_be_caught;
};
-/* Implement the "dtor" breakpoint_ops method for syscall
- catchpoints. */
-
-static void
-dtor_catch_syscall (struct breakpoint *b)
-{
- struct syscall_catchpoint *c = (struct syscall_catchpoint *) b;
-
- VEC_free (int, c->syscalls_to_be_caught);
-
- base_breakpoint_ops.dtor (b);
-}
-
-static const struct inferior_data *catch_syscall_inferior_data = NULL;
-
struct catch_syscall_inferior_data
{
/* We keep a count of the number of times the user has requested a
int any_syscall_count;
/* Count of each system call. */
- VEC(int) *syscalls_counts;
+ std::vector<int> syscalls_counts;
/* This counts all syscall catch requests, so we can readily determine
if any catching is necessary. */
int total_syscalls_count;
};
-static struct catch_syscall_inferior_data*
+static const struct inferior_key<struct catch_syscall_inferior_data>
+ catch_syscall_inferior_data;
+
+static struct catch_syscall_inferior_data *
get_catch_syscall_inferior_data (struct inferior *inf)
{
struct catch_syscall_inferior_data *inf_data;
- inf_data = ((struct catch_syscall_inferior_data *)
- inferior_data (inf, catch_syscall_inferior_data));
+ inf_data = catch_syscall_inferior_data.get (inf);
if (inf_data == NULL)
- {
- inf_data = XCNEW (struct catch_syscall_inferior_data);
- set_inferior_data (inf, catch_syscall_inferior_data, inf_data);
- }
+ inf_data = catch_syscall_inferior_data.emplace (inf);
return inf_data;
}
-static void
-catch_syscall_inferior_data_cleanup (struct inferior *inf, void *arg)
-{
- xfree (arg);
-}
-
-
/* Implement the "insert" breakpoint_ops method for syscall
catchpoints. */
= get_catch_syscall_inferior_data (inf);
++inf_data->total_syscalls_count;
- if (!c->syscalls_to_be_caught)
+ if (c->syscalls_to_be_caught.empty ())
++inf_data->any_syscall_count;
else
{
- int i, iter;
-
- for (i = 0;
- VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
- i++)
+ for (int iter : c->syscalls_to_be_caught)
{
- int elem;
-
- if (iter >= VEC_length (int, inf_data->syscalls_counts))
- {
- int old_size = VEC_length (int, inf_data->syscalls_counts);
- uintptr_t vec_addr_offset
- = old_size * ((uintptr_t) sizeof (int));
- uintptr_t vec_addr;
- VEC_safe_grow (int, inf_data->syscalls_counts, iter + 1);
- vec_addr = ((uintptr_t) VEC_address (int,
- inf_data->syscalls_counts)
- + vec_addr_offset);
- memset ((void *) vec_addr, 0,
- (iter + 1 - old_size) * sizeof (int));
- }
- elem = VEC_index (int, inf_data->syscalls_counts, iter);
- VEC_replace (int, inf_data->syscalls_counts, iter, ++elem);
+ if (iter >= inf_data->syscalls_counts.size ())
+ inf_data->syscalls_counts.resize (iter + 1);
+ ++inf_data->syscalls_counts[iter];
}
}
- return target_set_syscall_catchpoint (ptid_get_pid (inferior_ptid),
+ return target_set_syscall_catchpoint (inferior_ptid.pid (),
inf_data->total_syscalls_count != 0,
inf_data->any_syscall_count,
- VEC_length (int,
- inf_data->syscalls_counts),
- VEC_address (int,
- inf_data->syscalls_counts));
+ inf_data->syscalls_counts);
}
/* Implement the "remove" breakpoint_ops method for syscall
= get_catch_syscall_inferior_data (inf);
--inf_data->total_syscalls_count;
- if (!c->syscalls_to_be_caught)
+ if (c->syscalls_to_be_caught.empty ())
--inf_data->any_syscall_count;
else
{
- int i, iter;
-
- for (i = 0;
- VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
- i++)
+ for (int iter : c->syscalls_to_be_caught)
{
- int elem;
- if (iter >= VEC_length (int, inf_data->syscalls_counts))
+ if (iter >= inf_data->syscalls_counts.size ())
/* Shouldn't happen. */
continue;
- elem = VEC_index (int, inf_data->syscalls_counts, iter);
- VEC_replace (int, inf_data->syscalls_counts, iter, --elem);
+ --inf_data->syscalls_counts[iter];
}
}
- return target_set_syscall_catchpoint (ptid_get_pid (inferior_ptid),
+ return target_set_syscall_catchpoint (inferior_ptid.pid (),
inf_data->total_syscalls_count != 0,
inf_data->any_syscall_count,
- VEC_length (int,
- inf_data->syscalls_counts),
- VEC_address (int,
- inf_data->syscalls_counts));
+ inf_data->syscalls_counts);
}
/* Implement the "breakpoint_hit" breakpoint_ops method for syscall
static int
breakpoint_hit_catch_syscall (const struct bp_location *bl,
- struct address_space *aspace, CORE_ADDR bp_addr,
+ const address_space *aspace, CORE_ADDR bp_addr,
const struct target_waitstatus *ws)
{
/* We must check if we are catching specific syscalls in this
syscall_number = ws->value.syscall_number;
/* Now, checking if the syscall is the same. */
- if (c->syscalls_to_be_caught)
+ if (!c->syscalls_to_be_caught.empty ())
{
- int i, iter;
-
- for (i = 0;
- VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
- i++)
+ for (int iter : c->syscalls_to_be_caught)
if (syscall_number == iter)
return 1;
syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY
or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we
must print "called syscall" or "returned from syscall". */
- ptid_t ptid;
struct target_waitstatus last;
struct syscall s;
struct gdbarch *gdbarch = bs->bp_location_at->gdbarch;
- get_last_target_status (&ptid, &last);
+ get_last_target_status (nullptr, nullptr, &last);
get_syscall_by_number (gdbarch, last.value.syscall_number, &s);
maybe_print_thread_hit_breakpoint (uiout);
if (b->disposition == disp_del)
- ui_out_text (uiout, "Temporary catchpoint ");
+ uiout->text ("Temporary catchpoint ");
else
- ui_out_text (uiout, "Catchpoint ");
- if (ui_out_is_mi_like_p (uiout))
+ uiout->text ("Catchpoint ");
+ if (uiout->is_mi_like_p ())
{
- ui_out_field_string (uiout, "reason",
+ uiout->field_string ("reason",
async_reason_lookup (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY
? EXEC_ASYNC_SYSCALL_ENTRY
: EXEC_ASYNC_SYSCALL_RETURN));
- ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
+ uiout->field_string ("disp", bpdisp_text (b->disposition));
}
- ui_out_field_int (uiout, "bkptno", b->number);
+ uiout->field_signed ("bkptno", b->number);
if (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY)
- ui_out_text (uiout, " (call to syscall ");
+ uiout->text (" (call to syscall ");
else
- ui_out_text (uiout, " (returned from syscall ");
+ uiout->text (" (returned from syscall ");
- if (s.name == NULL || ui_out_is_mi_like_p (uiout))
- ui_out_field_int (uiout, "syscall-number", last.value.syscall_number);
+ if (s.name == NULL || uiout->is_mi_like_p ())
+ uiout->field_signed ("syscall-number", last.value.syscall_number);
if (s.name != NULL)
- ui_out_field_string (uiout, "syscall-name", s.name);
+ uiout->field_string ("syscall-name", s.name);
- ui_out_text (uiout, "), ");
+ uiout->text ("), ");
return PRINT_SRC_AND_LOC;
}
line up too nicely with the headers, but the effect is relatively
readable). */
if (opts.addressprint)
- ui_out_field_skip (uiout, "addr");
+ uiout->field_skip ("addr");
annotate_field (5);
- if (c->syscalls_to_be_caught
- && VEC_length (int, c->syscalls_to_be_caught) > 1)
- ui_out_text (uiout, "syscalls \"");
+ if (c->syscalls_to_be_caught.size () > 1)
+ uiout->text ("syscalls \"");
else
- ui_out_text (uiout, "syscall \"");
+ uiout->text ("syscall \"");
- if (c->syscalls_to_be_caught)
+ if (!c->syscalls_to_be_caught.empty ())
{
- int i, iter;
char *text = xstrprintf ("%s", "");
- for (i = 0;
- VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
- i++)
+ for (int iter : c->syscalls_to_be_caught)
{
- char *x = text;
+ char *previous_text = text;
struct syscall s;
get_syscall_by_number (gdbarch, iter, &s);
else
text = xstrprintf ("%s%d, ", text, iter);
- /* We have to xfree the last 'text' (now stored at 'x')
- because xstrprintf dynamically allocates new space for it
- on every call. */
- xfree (x);
+ /* We have to xfree previous_text because xstrprintf dynamically
+ allocates new space for text on every call. */
+ xfree (previous_text);
}
/* Remove the last comma. */
text[strlen (text) - 2] = '\0';
- ui_out_field_string (uiout, "what", text);
+ uiout->field_string ("what", text);
+ /* xfree last text. */
+ xfree (text);
}
else
- ui_out_field_string (uiout, "what", "<any syscall>");
- ui_out_text (uiout, "\" ");
+ uiout->field_string ("what", "<any syscall>", metadata_style.style ());
+ uiout->text ("\" ");
- if (ui_out_is_mi_like_p (uiout))
- ui_out_field_string (uiout, "catch-type", "syscall");
+ if (uiout->is_mi_like_p ())
+ uiout->field_string ("catch-type", "syscall");
}
/* Implement the "print_mention" breakpoint_ops method for syscall
struct syscall_catchpoint *c = (struct syscall_catchpoint *) b;
struct gdbarch *gdbarch = b->loc->gdbarch;
- if (c->syscalls_to_be_caught)
+ if (!c->syscalls_to_be_caught.empty ())
{
- int i, iter;
-
- if (VEC_length (int, c->syscalls_to_be_caught) > 1)
+ if (c->syscalls_to_be_caught.size () > 1)
printf_filtered (_("Catchpoint %d (syscalls"), b->number);
else
printf_filtered (_("Catchpoint %d (syscall"), b->number);
- for (i = 0;
- VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
- i++)
+ for (int iter : c->syscalls_to_be_caught)
{
struct syscall s;
get_syscall_by_number (gdbarch, iter, &s);
- if (s.name)
+ if (s.name != NULL)
printf_filtered (" '%s' [%d]", s.name, s.number);
else
printf_filtered (" %d", s.number);
fprintf_unfiltered (fp, "catch syscall");
- if (c->syscalls_to_be_caught)
+ for (int iter : c->syscalls_to_be_caught)
{
- int i, iter;
-
- for (i = 0;
- VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
- i++)
- {
- struct syscall s;
+ struct syscall s;
- get_syscall_by_number (gdbarch, iter, &s);
- if (s.name)
- fprintf_unfiltered (fp, " %s", s.name);
- else
- fprintf_unfiltered (fp, " %d", s.number);
- }
+ get_syscall_by_number (gdbarch, iter, &s);
+ if (s.name != NULL)
+ fprintf_unfiltered (fp, " %s", s.name);
+ else
+ fprintf_unfiltered (fp, " %d", s.number);
}
+
print_recreate_thread (b, fp);
}
}
static void
-create_syscall_event_catchpoint (int tempflag, VEC(int) *filter,
+create_syscall_event_catchpoint (int tempflag, std::vector<int> &&filter,
const struct breakpoint_ops *ops)
{
- struct syscall_catchpoint *c;
struct gdbarch *gdbarch = get_current_arch ();
- c = new syscall_catchpoint ();
- init_catchpoint (&c->base, gdbarch, tempflag, NULL, ops);
- c->syscalls_to_be_caught = filter;
+ std::unique_ptr<syscall_catchpoint> c (new syscall_catchpoint ());
+ init_catchpoint (c.get (), gdbarch, tempflag, NULL, ops);
+ c->syscalls_to_be_caught = std::move (filter);
- install_breakpoint (0, &c->base, 1);
+ install_breakpoint (0, std::move (c), 1);
}
-/* Splits the argument using space as delimiter. Returns an xmalloc'd
- filter list, or NULL if no filtering is required. */
-static VEC(int) *
-catch_syscall_split_args (char *arg)
+/* Splits the argument using space as delimiter. */
+
+static std::vector<int>
+catch_syscall_split_args (const char *arg)
{
- VEC(int) *result = NULL;
- struct cleanup *cleanup = make_cleanup (VEC_cleanup (int), &result);
+ std::vector<int> result;
struct gdbarch *gdbarch = target_gdbarch ();
while (*arg != '\0')
if (*endptr == '\0')
{
get_syscall_by_number (gdbarch, syscall_number, &s);
- VEC_safe_push (int, result, s.number);
+ result.push_back (s.number);
}
else if (startswith (cur_name, "g:")
|| startswith (cur_name, "group:"))
{
/* We have a syscall group. Let's expand it into a syscall
list before inserting. */
- struct syscall *syscall_list;
const char *group_name;
/* Skip over "g:" and "group:" prefix strings. */
group_name = strchr (cur_name, ':') + 1;
- syscall_list = get_syscalls_by_group (gdbarch, group_name);
-
- if (syscall_list == NULL)
+ if (!get_syscalls_by_group (gdbarch, group_name, &result))
error (_("Unknown syscall group '%s'."), group_name);
-
- for (i = 0; syscall_list[i].name != NULL; i++)
- {
- /* Insert each syscall that are part of the group. No
- need to check if it is valid. */
- VEC_safe_push (int, result, syscall_list[i].number);
- }
-
- xfree (syscall_list);
}
else
{
- /* We have a name. Let's check if it's valid and convert it
- to a number. */
- get_syscall_by_name (gdbarch, cur_name, &s);
-
- if (s.number == UNKNOWN_SYSCALL)
+ /* We have a name. Let's check if it's valid and fetch a
+ list of matching numbers. */
+ if (!get_syscalls_by_name (gdbarch, cur_name, &result))
/* Here we have to issue an error instead of a warning,
because GDB cannot do anything useful if there's no
syscall number to be caught. */
error (_("Unknown syscall name '%s'."), cur_name);
-
- /* Ok, it's valid. */
- VEC_safe_push (int, result, s.number);
}
}
- discard_cleanups (cleanup);
return result;
}
/* Implement the "catch syscall" command. */
static void
-catch_syscall_command_1 (char *arg, int from_tty,
+catch_syscall_command_1 (const char *arg, int from_tty,
struct cmd_list_element *command)
{
int tempflag;
- VEC(int) *filter;
+ std::vector<int> filter;
struct syscall s;
struct gdbarch *gdbarch = get_current_arch ();
if (arg != NULL)
filter = catch_syscall_split_args (arg);
- else
- filter = NULL;
- create_syscall_event_catchpoint (tempflag, filter,
+ create_syscall_event_catchpoint (tempflag, std::move (filter),
&catch_syscall_breakpoint_ops);
}
{
struct syscall_catchpoint *c = (struct syscall_catchpoint *) b;
- if (c->syscalls_to_be_caught)
+ if (!c->syscalls_to_be_caught.empty ())
{
- int i, iter;
- for (i = 0;
- VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
- i++)
+ for (int iter : c->syscalls_to_be_caught)
if (syscall_number == iter)
return 1;
}
}
/* Complete syscall names. Used by "catch syscall". */
-static VEC (char_ptr) *
+
+static void
catch_syscall_completer (struct cmd_list_element *cmd,
+ completion_tracker &tracker,
const char *text, const char *word)
{
struct gdbarch *gdbarch = get_current_arch ();
- struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
- VEC (char_ptr) *group_retlist = NULL;
- VEC (char_ptr) *syscall_retlist = NULL;
- VEC (char_ptr) *retlist = NULL;
- const char **group_list = NULL;
- const char **syscall_list = NULL;
+ gdb::unique_xmalloc_ptr<const char *> group_list;
const char *prefix;
- int i;
/* Completion considers ':' to be a word separator, so we use this to
verify whether the previous word was a group prefix. If so, we
if (startswith (prefix, "g:") || startswith (prefix, "group:"))
{
/* Perform completion inside 'group:' namespace only. */
- group_list = get_syscall_group_names (gdbarch);
- retlist = (group_list == NULL
- ? NULL : complete_on_enum (group_list, word, word));
+ group_list.reset (get_syscall_group_names (gdbarch));
+ if (group_list != NULL)
+ complete_on_enum (tracker, group_list.get (), word, word);
}
else
{
/* Complete with both, syscall names and groups. */
- syscall_list = get_syscall_names (gdbarch);
- group_list = get_syscall_group_names (gdbarch);
-
- /* Append "group:" prefix to syscall groups. */
- for (i = 0; group_list[i] != NULL; i++)
- {
- char *prefixed_group = xstrprintf ("group:%s", group_list[i]);
+ gdb::unique_xmalloc_ptr<const char *> syscall_list
+ (get_syscall_names (gdbarch));
+ group_list.reset (get_syscall_group_names (gdbarch));
- group_list[i] = prefixed_group;
- make_cleanup (xfree, prefixed_group);
- }
+ const char **group_ptr = group_list.get ();
- syscall_retlist = ((syscall_list == NULL)
- ? NULL : complete_on_enum (syscall_list, word, word));
- group_retlist = ((group_list == NULL)
- ? NULL : complete_on_enum (group_list, word, word));
+ /* Hold on to strings while we're using them. */
+ std::vector<std::string> holders;
- retlist = VEC_merge (char_ptr, syscall_retlist, group_retlist);
- }
+ /* Append "group:" prefix to syscall groups. */
+ for (int i = 0; group_ptr[i] != NULL; i++)
+ holders.push_back (string_printf ("group:%s", group_ptr[i]));
- VEC_free (char_ptr, syscall_retlist);
- VEC_free (char_ptr, group_retlist);
- xfree (syscall_list);
- xfree (group_list);
- do_cleanups (cleanups);
+ for (int i = 0; group_ptr[i] != NULL; i++)
+ group_ptr[i] = holders[i].c_str ();
- return retlist;
+ if (syscall_list != NULL)
+ complete_on_enum (tracker, syscall_list.get (), word, word);
+ if (group_list != NULL)
+ complete_on_enum (tracker, group_ptr, word, word);
+ }
}
static void
inf_data->total_syscalls_count = 0;
inf_data->any_syscall_count = 0;
- VEC_free (int, inf_data->syscalls_counts);
+ inf_data->syscalls_counts.clear ();
}
static void
/* Syscall catchpoints. */
ops = &catch_syscall_breakpoint_ops;
*ops = base_breakpoint_ops;
- ops->dtor = dtor_catch_syscall;
ops->insert_location = insert_catch_syscall;
ops->remove_location = remove_catch_syscall;
ops->breakpoint_hit = breakpoint_hit_catch_syscall;
ops->print_recreate = print_recreate_catch_syscall;
}
-initialize_file_ftype _initialize_break_catch_syscall;
-
+void _initialize_break_catch_syscall ();
void
-_initialize_break_catch_syscall (void)
+_initialize_break_catch_syscall ()
{
initialize_syscall_catchpoint_ops ();
- observer_attach_inferior_exit (clear_syscall_counts);
- catch_syscall_inferior_data
- = register_inferior_data_with_cleanup (NULL,
- catch_syscall_inferior_data_cleanup);
+ gdb::observers::inferior_exit.attach (clear_syscall_counts);
add_catch_command ("syscall", _("\
Catch system calls by their names, groups and/or numbers.\n\
projects / deliverable / binutils-gdb.git / blobdiff