[PATCH v2] sparse/dissect: don't miss inline functions when !dissect_show_all_symbols

[Oleg Nesterov <oleg@redhat.com>]

parse_function_body() doesn't do add_symbol(decl) if MOD_INLINE, this
means that dissect/semind can't see the definitions of inline functions
in translation_unit_used_list.

This change is not really needed if dissect_show_all_symbols == 1, in
this case do_file() inspects file_scope/global_scope.

Test-case:

	$ cat -n INLINE.c
	     1	static inline void i_func1(void)
	     2	{
	     3		unkown();
	     4	}
	     5	static inline void *i_func2(void)
	     6	{
	     7		return i_func1;
	     8	}
	     9
	    10	void func(void)
	    11	{
	    12		i_func2();
	    13	}

Before this patch:

	$ ./test-dissect INLINE.c

	  10:6                    def   f func                             void ( ... )
	  12:9   func             --r   f i_func2                          void *( ... )

With this patch:

	$ ./test-dissect INLINE.c

	  10:6                    def   f func                             void ( ... )
	   5:21                   def   f i_func2                          void *( ... )
	   1:20                   def   f i_func1                          void ( ... )
	   3:9   i_func1          --r   f unkown                           bad type
	   7:16  i_func2          r--   f i_func1                          void ( ... )
	  12:9   func             --r   f i_func2                          void *( ... )

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 dissect.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/dissect.c b/dissect.c
index a825bb30..b9d4adc4 100644
--- a/dissect.c
+++ b/dissect.c
@@ -59,6 +59,7 @@ static void do_sym_list(struct symbol_list *list);
 
 static struct symbol
 	*base_type(struct symbol *sym),
+	*do_symbol(struct symbol *sym),
 	*do_initializer(struct symbol *type, struct expression *expr),
 	*do_expression(usage_t mode, struct expression *expr),
 	*do_statement(usage_t mode, struct statement *stmt);
@@ -225,6 +226,12 @@ static void examine_sym_node(struct symbol *node, struct symbol *parent)
 
 		case SYM_FN:
 			node->kind = 'f';
+			if (node->ctype.modifiers & MOD_INLINE) {
+				struct symbol *dctx = dissect_ctx;
+				dissect_ctx = NULL;
+				do_symbol(node);
+				dissect_ctx = dctx;
+			}
 			node = base;
 			break;
 
@@ -621,7 +628,7 @@ static inline bool is_typedef(struct symbol *sym)
 	return (sym->namespace == NS_TYPEDEF);
 }
 
-static inline struct symbol *do_symbol(struct symbol *sym)
+static struct symbol *do_symbol(struct symbol *sym)
 {
 	struct symbol *type = base_type(sym);
 	struct symbol *dctx = dissect_ctx;
-- 
2.52.0