stabs.c static state

Move all the function local static state variables to file scope,
in order to tidy memory on exit and to reinit everything for that
annoying oss-fuzz.  Also fix a couple memory leaks.

	* read.h (read_begin, read_end): Declare.
	* read.c (read_begin): Call stabs_begin.
	(read_end): Call stabs_end.
	* stabs.c (stabs_begin, stabs_end): New functions.
	(in_dot_func_p): Delete, use current_function_label instead.
	(cached_sec): Move from s_stab_generic.
	(last_asm_file, file_label_count): Move from generate_asm_file.
	(line_label_count, prev_lineno, prev_line_file): Move from
	stabs_generate_asm_lineno.
	(void_emitted_p): Move from stabs_generate_asm_func.
	(endfunc_label_count): Move from stabs_generate_asm_endfunc.
	(stabs_generate_asm_lineno): Simplify setting of
	prev_line_file.
	(stabs_generate_asm_func): Don't leak current_function_label.
	(stabs_generate_asm_endfunc): Likewise.

1 files changed, 2 insertions, 0 deletions

diff --git a/gas/read.h b/gas/read.h
index baac591..406b026 100644
--- a/gas/read.h
+++ b/gas/read.h
@@ -149,6 +149,8 @@ extern void stabs_generate_asm_file (void);
 extern void stabs_generate_asm_lineno (void);
 extern void stabs_generate_asm_func (const char *, const char *);
 extern void stabs_generate_asm_endfunc (const char *, const char *);
+extern void stabs_begin (void);
+extern void stabs_end (void);
 extern void do_repeat (size_t, const char *, const char *, const char *);
 extern void end_repeat (int);
 extern void do_parse_cons_expression (expressionS *, int);