Remove exception_none

Now that gdb_exception has a constructor, there's no need for
exception_none.  This patch removes it.

gdb/ChangeLog
2019-04-25  Tom Tromey  <tromey@adacore.com>

	* xml-support.c (gdb_xml_parser::gdb_xml_parser): Update.
	* python/py-value.c (valpy_getitem, valpy_nonzero): Update.
	* python/py-inferior.c (infpy_write_memory, infpy_search_memory):
	Update.
	* python/py-breakpoint.c (bppy_set_condition, bppy_set_commands):
	Update.
	* mi/mi-interp.c (mi_interp::exec): Update.
	* linespec.c (parse_linespec): Update.
	* infcall.c (run_inferior_call): Update.
	* guile/scm-value.c (gdbscm_value_to_lazy_string): Update.
	* guile/scm-symbol.c (gdbscm_lookup_symbol)
	(gdbscm_lookup_global_symbol): Update.
	* guile/scm-param.c (gdbscm_parameter_value): Update.
	* guile/scm-frame.c (gdbscm_frame_read_register)
	(gdbscm_frame_read_var): Update.
	* guile/scm-breakpoint.c (gdbscm_register_breakpoint_x): Update.
	* exec.c (try_open_exec_file): Update.
	* event-top.c (gdb_rl_callback_read_char_wrapper_noexcept)
	(gdb_rl_callback_handler): Update.
	* common/common-exceptions.h (exception_none): Don't declare.
	* common/common-exceptions.c (exception_none): Don't define.
	(struct catcher) <exception>: Update.
	* cli/cli-interp.c (safe_execute_command): Update.
	* breakpoint.c (insert_bp_location, location_to_sals): Update.

5 files changed, 7 insertions, 7 deletions

diff --git a/gdb/guile/scm-breakpoint.c b/gdb/guile/scm-breakpoint.c
index 3ba2dab..f86c263 100644
--- a/gdb/guile/scm-breakpoint.c
+++ b/gdb/guile/scm-breakpoint.c
@@ -411,7 +411,7 @@ gdbscm_register_breakpoint_x (SCM self)
 {
   breakpoint_smob *bp_smob
     = bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
-  struct gdb_exception except = exception_none;
+  struct gdb_exception except;
   const char *location, *copy;
 
   /* We only support registering breakpoints created with make-breakpoint.  */
diff --git a/gdb/guile/scm-frame.c b/gdb/guile/scm-frame.c
index ca271db..f3795f8 100644
--- a/gdb/guile/scm-frame.c
+++ b/gdb/guile/scm-frame.c
@@ -777,7 +777,7 @@ gdbscm_frame_read_register (SCM self, SCM register_scm)
   gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, NULL, "s",
 			      register_scm, &register_str);
 
-  struct gdb_exception except = exception_none;
+  struct gdb_exception except;
 
   try
     {
@@ -864,7 +864,7 @@ gdbscm_frame_read_var (SCM self, SCM symbol_scm, SCM rest)
     }
   else if (scm_is_string (symbol_scm))
     {
-      struct gdb_exception except = exception_none;
+      struct gdb_exception except;
 
       if (! SCM_UNBNDP (block_scm))
 	{
diff --git a/gdb/guile/scm-param.c b/gdb/guile/scm-param.c
index a55deab..cc10806 100644
--- a/gdb/guile/scm-param.c
+++ b/gdb/guile/scm-param.c
@@ -1056,7 +1056,7 @@ gdbscm_parameter_value (SCM self)
       struct cmd_list_element *alias, *prefix, *cmd;
       char *newarg;
       int found = -1;
-      struct gdb_exception except = exception_none;
+      struct gdb_exception except;
 
       gdb::unique_xmalloc_ptr<char> name
 	= gdbscm_scm_to_host_string (self, NULL, &except_scm);
diff --git a/gdb/guile/scm-symbol.c b/gdb/guile/scm-symbol.c
index c135ff5..ab39123 100644
--- a/gdb/guile/scm-symbol.c
+++ b/gdb/guile/scm-symbol.c
@@ -614,7 +614,7 @@ gdbscm_lookup_symbol (SCM name_scm, SCM rest)
 	}
     }
 
-  struct gdb_exception except = exception_none;
+  struct gdb_exception except;
   try
     {
       symbol = lookup_symbol (name, block, (domain_enum) domain,
@@ -646,7 +646,7 @@ gdbscm_lookup_global_symbol (SCM name_scm, SCM rest)
   int domain_arg_pos = -1;
   int domain = VAR_DOMAIN;
   struct symbol *symbol = NULL;
-  struct gdb_exception except = exception_none;
+  struct gdb_exception except;
 
   gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#i",
 			      name_scm, &name, rest,
diff --git a/gdb/guile/scm-value.c b/gdb/guile/scm-value.c
index 5bbc3e8..00d1c18 100644
--- a/gdb/guile/scm-value.c
+++ b/gdb/guile/scm-value.c
@@ -1048,7 +1048,7 @@ gdbscm_value_to_lazy_string (SCM self, SCM rest)
   char *encoding = NULL;
   int length = -1;
   SCM result = SCM_BOOL_F; /* -Wall */
-  struct gdb_exception except = exception_none;
+  struct gdb_exception except;
 
   /* The sequencing here, as everywhere else, is important.
      We can't have existing cleanups when a Scheme exception is thrown.  */