Move "catch exec" to a new file

The "catch exec" code is reasonably self-contained, and so this patch
moves it out of breakpoint.c (the second largest source file in gdb)
and into a new file, break-catch-exec.c.

3 files changed, 237 insertions, 191 deletions

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 6ae511d..3efd222 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -999,6 +999,7 @@ COMMON_SFILES = \
 	bfd-target.c \
 	block.c \
 	blockframe.c \
+	break-catch-exec.c \
 	break-catch-fork.c \
 	break-catch-sig.c \
 	break-catch-syscall.c \
diff --git a/gdb/break-catch-exec.c b/gdb/break-catch-exec.c
new file mode 100644
index 0000000..c0cf2ae
--- /dev/null
+++ b/gdb/break-catch-exec.c
@@ -0,0 +1,236 @@
+/* Everything about exec catchpoints, for GDB.
+
+   Copyright (C) 1986-2022 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+
+#include "annotate.h"
+#include "arch-utils.h"
+#include "breakpoint.h"
+#include "cli/cli-decode.h"
+#include "inferior.h"
+#include "mi/mi-common.h"
+#include "target.h"
+#include "valprint.h"
+
+/* Exec catchpoints.  */
+
+/* An instance of this type is used to represent an exec catchpoint.
+   A breakpoint is really of this type iff its ops pointer points to
+   CATCH_EXEC_BREAKPOINT_OPS.  */
+
+struct exec_catchpoint : public breakpoint
+{
+  /* Filename of a program whose exec triggered this catchpoint.
+     This field is only valid immediately after this catchpoint has
+     triggered.  */
+  gdb::unique_xmalloc_ptr<char> exec_pathname;
+};
+
+static int
+insert_catch_exec (struct bp_location *bl)
+{
+  return target_insert_exec_catchpoint (inferior_ptid.pid ());
+}
+
+static int
+remove_catch_exec (struct bp_location *bl, enum remove_bp_reason reason)
+{
+  return target_remove_exec_catchpoint (inferior_ptid.pid ());
+}
+
+static int
+breakpoint_hit_catch_exec (const struct bp_location *bl,
+			   const address_space *aspace, CORE_ADDR bp_addr,
+			   const target_waitstatus &ws)
+{
+  struct exec_catchpoint *c = (struct exec_catchpoint *) bl->owner;
+
+  if (ws.kind () != TARGET_WAITKIND_EXECD)
+    return 0;
+
+  c->exec_pathname = make_unique_xstrdup (ws.execd_pathname ());
+  return 1;
+}
+
+static enum print_stop_action
+print_it_catch_exec (bpstat *bs)
+{
+  struct ui_out *uiout = current_uiout;
+  struct breakpoint *b = bs->breakpoint_at;
+  struct exec_catchpoint *c = (struct exec_catchpoint *) b;
+
+  annotate_catchpoint (b->number);
+  maybe_print_thread_hit_breakpoint (uiout);
+  if (b->disposition == disp_del)
+    uiout->text ("Temporary catchpoint ");
+  else
+    uiout->text ("Catchpoint ");
+  if (uiout->is_mi_like_p ())
+    {
+      uiout->field_string ("reason", async_reason_lookup (EXEC_ASYNC_EXEC));
+      uiout->field_string ("disp", bpdisp_text (b->disposition));
+    }
+  uiout->field_signed ("bkptno", b->number);
+  uiout->text (" (exec'd ");
+  uiout->field_string ("new-exec", c->exec_pathname.get ());
+  uiout->text ("), ");
+
+  return PRINT_SRC_AND_LOC;
+}
+
+static void
+print_one_catch_exec (struct breakpoint *b, struct bp_location **last_loc)
+{
+  struct exec_catchpoint *c = (struct exec_catchpoint *) b;
+  struct value_print_options opts;
+  struct ui_out *uiout = current_uiout;
+
+  get_user_print_options (&opts);
+
+  /* Field 4, the address, is omitted (which makes the columns
+     not line up too nicely with the headers, but the effect
+     is relatively readable).  */
+  if (opts.addressprint)
+    uiout->field_skip ("addr");
+  annotate_field (5);
+  uiout->text ("exec");
+  if (c->exec_pathname != NULL)
+    {
+      uiout->text (", program \"");
+      uiout->field_string ("what", c->exec_pathname.get ());
+      uiout->text ("\" ");
+    }
+
+  if (uiout->is_mi_like_p ())
+    uiout->field_string ("catch-type", "exec");
+}
+
+static void
+print_mention_catch_exec (struct breakpoint *b)
+{
+  printf_filtered (_("Catchpoint %d (exec)"), b->number);
+}
+
+/* Implement the "print_recreate" breakpoint_ops method for exec
+   catchpoints.  */
+
+static void
+print_recreate_catch_exec (struct breakpoint *b, struct ui_file *fp)
+{
+  fprintf_unfiltered (fp, "catch exec");
+  print_recreate_thread (b, fp);
+}
+
+static struct breakpoint_ops catch_exec_breakpoint_ops;
+
+/* This function attempts to parse an optional "if <cond>" clause
+   from the arg string.  If one is not found, it returns NULL.
+
+   Else, it returns a pointer to the condition string.  (It does not
+   attempt to evaluate the string against a particular block.)  And,
+   it updates arg to point to the first character following the parsed
+   if clause in the arg string.  */
+
+const char *
+ep_parse_optional_if_clause (const char **arg)
+{
+  const char *cond_string;
+
+  if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
+    return NULL;
+
+  /* Skip the "if" keyword.  */
+  (*arg) += 2;
+
+  /* Skip any extra leading whitespace, and record the start of the
+     condition string.  */
+  *arg = skip_spaces (*arg);
+  cond_string = *arg;
+
+  /* Assume that the condition occupies the remainder of the arg
+     string.  */
+  (*arg) += strlen (cond_string);
+
+  return cond_string;
+}
+
+/* Commands to deal with catching events, such as signals, exceptions,
+   process start/exit, etc.  */
+
+static void
+catch_exec_command_1 (const char *arg, int from_tty,
+		      struct cmd_list_element *command)
+{
+  struct gdbarch *gdbarch = get_current_arch ();
+  const char *cond_string = NULL;
+  bool temp = command->context () == CATCH_TEMPORARY;
+
+  if (!arg)
+    arg = "";
+  arg = skip_spaces (arg);
+
+  /* The allowed syntax is:
+     catch exec
+     catch exec if <cond>
+
+     First, check if there's an if clause.  */
+  cond_string = ep_parse_optional_if_clause (&arg);
+
+  if ((*arg != '\0') && !isspace (*arg))
+    error (_("Junk at end of arguments."));
+
+  std::unique_ptr<exec_catchpoint> c (new exec_catchpoint ());
+  init_catchpoint (c.get (), gdbarch, temp, cond_string,
+		   &catch_exec_breakpoint_ops);
+  c->exec_pathname.reset ();
+
+  install_breakpoint (0, std::move (c), 1);
+}
+
+static void
+initialize_ops ()
+{
+  struct breakpoint_ops *ops;
+
+  initialize_breakpoint_ops ();
+
+  /* Exec catchpoints.  */
+  ops = &catch_exec_breakpoint_ops;
+  *ops = base_breakpoint_ops;
+  ops->insert_location = insert_catch_exec;
+  ops->remove_location = remove_catch_exec;
+  ops->breakpoint_hit = breakpoint_hit_catch_exec;
+  ops->print_it = print_it_catch_exec;
+  ops->print_one = print_one_catch_exec;
+  ops->print_mention = print_mention_catch_exec;
+  ops->print_recreate = print_recreate_catch_exec;
+}
+
+void _initialize_break_catch_exec ();
+void
+_initialize_break_catch_exec ()
+{
+  initialize_ops ();
+
+  add_catch_command ("exec", _("Catch calls to exec."),
+		     catch_exec_command_1,
+		     NULL,
+		     CATCH_PERMANENT,
+		     CATCH_TEMPORARY);
+}
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index bfda5d7..1812bfe 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -7986,117 +7986,6 @@ install_breakpoint (int internal, std::unique_ptr<breakpoint> &&arg, int update_
     update_global_location_list (UGLL_MAY_INSERT);
 }
 
-/* Exec catchpoints.  */
-
-/* An instance of this type is used to represent an exec catchpoint.
-   A breakpoint is really of this type iff its ops pointer points to
-   CATCH_EXEC_BREAKPOINT_OPS.  */
-
-struct exec_catchpoint : public breakpoint
-{
-  /* Filename of a program whose exec triggered this catchpoint.
-     This field is only valid immediately after this catchpoint has
-     triggered.  */
-  gdb::unique_xmalloc_ptr<char> exec_pathname;
-};
-
-static int
-insert_catch_exec (struct bp_location *bl)
-{
-  return target_insert_exec_catchpoint (inferior_ptid.pid ());
-}
-
-static int
-remove_catch_exec (struct bp_location *bl, enum remove_bp_reason reason)
-{
-  return target_remove_exec_catchpoint (inferior_ptid.pid ());
-}
-
-static int
-breakpoint_hit_catch_exec (const struct bp_location *bl,
-			   const address_space *aspace, CORE_ADDR bp_addr,
-			   const target_waitstatus &ws)
-{
-  struct exec_catchpoint *c = (struct exec_catchpoint *) bl->owner;
-
-  if (ws.kind () != TARGET_WAITKIND_EXECD)
-    return 0;
-
-  c->exec_pathname = make_unique_xstrdup (ws.execd_pathname ());
-  return 1;
-}
-
-static enum print_stop_action
-print_it_catch_exec (bpstat *bs)
-{
-  struct ui_out *uiout = current_uiout;
-  struct breakpoint *b = bs->breakpoint_at;
-  struct exec_catchpoint *c = (struct exec_catchpoint *) b;
-
-  annotate_catchpoint (b->number);
-  maybe_print_thread_hit_breakpoint (uiout);
-  if (b->disposition == disp_del)
-    uiout->text ("Temporary catchpoint ");
-  else
-    uiout->text ("Catchpoint ");
-  if (uiout->is_mi_like_p ())
-    {
-      uiout->field_string ("reason", async_reason_lookup (EXEC_ASYNC_EXEC));
-      uiout->field_string ("disp", bpdisp_text (b->disposition));
-    }
-  uiout->field_signed ("bkptno", b->number);
-  uiout->text (" (exec'd ");
-  uiout->field_string ("new-exec", c->exec_pathname.get ());
-  uiout->text ("), ");
-
-  return PRINT_SRC_AND_LOC;
-}
-
-static void
-print_one_catch_exec (struct breakpoint *b, struct bp_location **last_loc)
-{
-  struct exec_catchpoint *c = (struct exec_catchpoint *) b;
-  struct value_print_options opts;
-  struct ui_out *uiout = current_uiout;
-
-  get_user_print_options (&opts);
-
-  /* Field 4, the address, is omitted (which makes the columns
-     not line up too nicely with the headers, but the effect
-     is relatively readable).  */
-  if (opts.addressprint)
-    uiout->field_skip ("addr");
-  annotate_field (5);
-  uiout->text ("exec");
-  if (c->exec_pathname != NULL)
-    {
-      uiout->text (", program \"");
-      uiout->field_string ("what", c->exec_pathname.get ());
-      uiout->text ("\" ");
-    }
-
-  if (uiout->is_mi_like_p ())
-    uiout->field_string ("catch-type", "exec");
-}
-
-static void
-print_mention_catch_exec (struct breakpoint *b)
-{
-  printf_filtered (_("Catchpoint %d (exec)"), b->number);
-}
-
-/* Implement the "print_recreate" breakpoint_ops method for exec
-   catchpoints.  */
-
-static void
-print_recreate_catch_exec (struct breakpoint *b, struct ui_file *fp)
-{
-  fprintf_unfiltered (fp, "catch exec");
-  print_recreate_thread (b, fp);
-}
-
-static struct breakpoint_ops catch_exec_breakpoint_ops;
-
 static int
 hw_breakpoint_used_count (void)
 {
@@ -10958,70 +10847,6 @@ until_break_command (const char *arg, int from_tty, int anywhere)
   proceed (-1, GDB_SIGNAL_DEFAULT);
 }
 
-/* This function attempts to parse an optional "if <cond>" clause
-   from the arg string.  If one is not found, it returns NULL.
-
-   Else, it returns a pointer to the condition string.  (It does not
-   attempt to evaluate the string against a particular block.)  And,
-   it updates arg to point to the first character following the parsed
-   if clause in the arg string.  */
-
-const char *
-ep_parse_optional_if_clause (const char **arg)
-{
-  const char *cond_string;
-
-  if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
-    return NULL;
-
-  /* Skip the "if" keyword.  */
-  (*arg) += 2;
-
-  /* Skip any extra leading whitespace, and record the start of the
-     condition string.  */
-  *arg = skip_spaces (*arg);
-  cond_string = *arg;
-
-  /* Assume that the condition occupies the remainder of the arg
-     string.  */
-  (*arg) += strlen (cond_string);
-
-  return cond_string;
-}
-
-/* Commands to deal with catching events, such as signals, exceptions,
-   process start/exit, etc.  */
-
-static void
-catch_exec_command_1 (const char *arg, int from_tty,
-		      struct cmd_list_element *command)
-{
-  struct gdbarch *gdbarch = get_current_arch ();
-  const char *cond_string = NULL;
-  bool temp = command->context () == CATCH_TEMPORARY;
-
-  if (!arg)
-    arg = "";
-  arg = skip_spaces (arg);
-
-  /* The allowed syntax is:
-     catch exec
-     catch exec if <cond>
-
-     First, check if there's an if clause.  */
-  cond_string = ep_parse_optional_if_clause (&arg);
-
-  if ((*arg != '\0') && !isspace (*arg))
-    error (_("Junk at end of arguments."));
-
-  std::unique_ptr<exec_catchpoint> c (new exec_catchpoint ());
-  init_catchpoint (c.get (), gdbarch, temp, cond_string,
-		   &catch_exec_breakpoint_ops);
-  c->exec_pathname.reset ();
-
-  install_breakpoint (0, std::move (c), 1);
-}
-
 void
 init_ada_exception_breakpoint (struct breakpoint *b,
 			       struct gdbarch *gdbarch,
@@ -15042,17 +14867,6 @@ initialize_breakpoint_ops (void)
   ops->create_breakpoints_sal = strace_marker_create_breakpoints_sal;
   ops->decode_location = strace_marker_decode_location;
 
-  /* Exec catchpoints.  */
-  ops = &catch_exec_breakpoint_ops;
-  *ops = base_breakpoint_ops;
-  ops->insert_location = insert_catch_exec;
-  ops->remove_location = remove_catch_exec;
-  ops->breakpoint_hit = breakpoint_hit_catch_exec;
-  ops->print_it = print_it_catch_exec;
-  ops->print_one = print_one_catch_exec;
-  ops->print_mention = print_mention_catch_exec;
-  ops->print_recreate = print_recreate_catch_exec;
-
   /* Solib-related catchpoints.  */
   ops = &catch_solib_breakpoint_ops;
   *ops = base_breakpoint_ops;
@@ -15357,11 +15171,6 @@ Set temporary catchpoints to catch events."),
 			&tcatch_cmdlist,
 			0/*allow-unknown*/, &cmdlist);
 
-  add_catch_command ("exec", _("Catch calls to exec."),
-		     catch_exec_command_1,
-		     NULL,
-		     CATCH_PERMANENT,
-		     CATCH_TEMPORARY);
   add_catch_command ("load", _("Catch loads of shared libraries.\n\
 Usage: catch load [REGEX]\n\
 If REGEX is given, only stop for libraries matching the regular expression."),