Make make-target-delegates grok namespace scope op and template params

The next patch will want to use gdb::array_view<int> as parameter type
of a target_ops method.  However, that runs into a
make-target-delegates limitation: target_debug_foo calls in
target-delegates.c for parameters/return types with namespace scope
operators ("::") or template parameters, end up looking like:

 @@ -1313,9 +1313,7 @@ debug_set_syscall_catchpoint (struct target_ops *self, int arg1, int arg2, int a
    fputs_unfiltered (", ", gdb_stdlog);
    target_debug_print_int (arg3);
    fputs_unfiltered (", ", gdb_stdlog);
 -  target_debug_print_int (arg4);
 -  fputs_unfiltered (", ", gdb_stdlog);
 -  target_debug_print_int_p (arg5);
 +  target_debug_print_gdb::array_view<const_int> (arg4);

which obviously isn't something that compiles.  The problem is that
make-target-delegates wasn't ever taught that '::', '<', and '>' can
appear in parameter/return types.  You could work around it by hidding
the unsupported characters behind a typedef in the target method
declaration, or by using an explicit TARGET_DEBUG_PRINTER, but it's
better to just remove the limitation.

While at it, also fix an "abuse" of reserved identifiers.

gdb/ChangeLog:

	* make-target-delegates (munge_type): Also munge '<', '>', and
	':'.  Avoid double underscores in identifiers, and trailing
	underscores.
	* target-debug.h
	(target_debug_print_VEC_static_tracepoint_marker_p__p): Rename to
	...
	(target_debug_print_VEC_static_tracepoint_marker_p_p): ... this.
	* target-delegates.c: Regenerate.

4 files changed, 24 insertions, 3 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 3a7b654..a360083 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,14 @@
+2017-12-03  Pedro Alves  <palves@redhat.com>
+
+	* make-target-delegates (munge_type): Also munge '<', '>', and
+	':'.  Avoid double underscores in identifiers, and trailing
+	underscores.
+	* target-debug.h
+	(target_debug_print_VEC_static_tracepoint_marker_p__p): Rename to
+	...
+	(target_debug_print_VEC_static_tracepoint_marker_p_p): ... this.
+	* target-delegates.c: Regenerate.
+
 2017-12-02  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* common/poison.h (XDELETE): Fix typo.
diff --git a/gdb/make-target-delegates b/gdb/make-target-delegates
index fd51c64..1773232 100755
--- a/gdb/make-target-delegates
+++ b/gdb/make-target-delegates
@@ -232,8 +232,18 @@ sub munge_type($) {
 	$result = $1;
     } else {
 	($result = $typename) =~ s/\s+$//;
-	$result =~ s/[ ()]/_/g;
+	$result =~ s/[ ()<>:]/_/g;
 	$result =~ s/[*]/p/g;
+
+	# Identifers with double underscores are reserved to the C++
+	# implementation.
+	$result =~ s/_+/_/g;
+
+	# Avoid ending the function name with underscore, for
+	# cosmetics.  Trailing underscores appear after munging types
+	# with template parameters, like e.g. "foo<int>".
+	$result =~ s/_$//g;
+
 	$result = 'target_debug_print_' . $result;
     }
 
diff --git a/gdb/target-debug.h b/gdb/target-debug.h
index 14196b4..068495e 100644
--- a/gdb/target-debug.h
+++ b/gdb/target-debug.h
@@ -116,7 +116,7 @@
   target_debug_do_print (host_address_to_string (X))
 #define target_debug_print_mem_region_vector(X) \
   target_debug_do_print (host_address_to_string (X.data ()))
-#define target_debug_print_VEC_static_tracepoint_marker_p__p(X)	\
+#define target_debug_print_VEC_static_tracepoint_marker_p_p(X)	\
   target_debug_do_print (host_address_to_string (X))
 #define target_debug_print_const_struct_target_desc_p(X)	\
   target_debug_do_print (host_address_to_string (X))
diff --git a/gdb/target-delegates.c b/gdb/target-delegates.c
index e0d7a9a..1cbe6f8 100644
--- a/gdb/target-delegates.c
+++ b/gdb/target-delegates.c
@@ -3352,7 +3352,7 @@ debug_static_tracepoint_markers_by_strid (struct target_ops *self, const char *a
   fputs_unfiltered (", ", gdb_stdlog);
   target_debug_print_const_char_p (arg1);
   fputs_unfiltered (") = ", gdb_stdlog);
-  target_debug_print_VEC_static_tracepoint_marker_p__p (result);
+  target_debug_print_VEC_static_tracepoint_marker_p_p (result);
   fputs_unfiltered ("\n", gdb_stdlog);
   return result;
 }