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.c b/gas/read.c
index c5a477f..9f6a700 100644
--- a/gas/read.c
+++ b/gas/read.c
@@ -274,11 +274,13 @@ read_begin (void)
 
   if (flag_mri)
     lex_type['?'] = 3;
+  stabs_begin ();
 }
 
 void
 read_end (void)
 {
+  stabs_end ();
   poend ();
   _obstack_free (&cond_obstack, NULL);
 }