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.
The newer update-copyright.py fixes file encoding too, removing cr/lf
on binutils/bfdtest2.c and ld/testsuite/ld-cygwin/exe-export.exp, and
embedded cr in binutils/testsuite/binutils-all/ar.exp string match.
Make it a little more obvious that remap_debug_filename returns an
allocated string (that should be freed) by returning a char * rather
than const char *. Free a few missed cases in dwarf2dbg.c, and free
other memory allocated in dwarf2dbg.c. Also remove static
initialisation of variables and initialise in dwarf2_init instead,
in order to ensure gas state is saner for oss-fuzz.
* remap.c (remap_debug_filename): Remove const from return.
* as.h (remap_debug_filename): Update prototype.
* config/obj-elf.c (obj_elf_ident): Simplify free of
remap_debug_filename output.
* stabs.c (stabs_generate_asm_file): Likewise.
* dwarf2dbg.c (dirs, dirs_in_use, dirs_allocated, current): Don't
initialise statically..
(dwarf2_init): ..do so here, along with most other static vars.
(assign_file_to_slot): Don't set files_allocated until we
succeed in allocating memory.
(purge_generated_debug): Add bool param, free more stuff if true.
(dwarf2_directive_filename): Adjust purge_generated_debug call.
(process_entries): Don't free line_entry here..
(dwarf2_cleanup): ..do so here instead, new function.
(dwarf2_finish): Call dwarf2_cleanup. When chaining together
subseg line entries, unhook entries from old subseg list.
(dwarf2_directive_loc): Free remap_debug_filename string.
(out_dir_and_file_list): Likewise.
(out_debug_str): Likewise.
The result of running etc/update-copyright.py --this-year, fixing all
the files whose mode is changed by the script, plus a build with
--enable-maintainer-mode --enable-cgen-maint=yes, then checking
out */po/*.pot which we don't update frequently.
The copy of cgen was with commit d1dd5fcc38ead reverted as that commit
breaks building of bfp opcodes files.
This removes ineffectual and wrong code caching section names in
gas/stabs.c. Code like
seg = subseg_new (name, 0);
...
if (seg->name == name)
seg->name = xstrdup (name);
with the idea of being able to unconditionally free "name" later no
longer works. "name" is referenced by the section hash table as well
as in the section->name field. It would be possible to use
"bfd_rename_section (stdoutput, seg, xstrdup (name))", but instead I
opted for a fairly straight-forward approach of adding extra
parameters to two functions to indicate section name strings should be
freed if possible.
PR 23938
* read.h (get_stab_string_offset): Update prototype.
* stabs.c (get_stab_string_offset): Add free_stabstr_secname
parameter. Free stabstr_secname if unused as section name.
Don't xstrdup name when used.
(s_stab_generic): Remove forward declaration. Add
stab_secname_obstack_end param. Reference notes obstack via
macros. Delete cached_secname. Adjust get_stab_string_offset
call. Free stab_secname if unused as section name.
(s_stab): Adjust s_stab_generic call.
(s_xstab): Likewise. Delete saved_secname and saved_strsecname.
* config/obj-elf.c (obj_elf_init_stab_section): Adjust
get_stab_string_offset call.
* config/obj-coff.c (obj_coff_init_stab_section): Likewise.
* config/obj-som.c (obj_som_init_stab_section): Likewise.
* testsuite/gas/all/pr23938.s: New test.
* testsuite/gas/all/gas.exp: Run it.
All of these warnings were false positives. -Wstringop-truncation is
particularly annoying when it warns about strncpy used quite correctly.
bfd/
* elf-linux-core.h (swap_linux_prpsinfo32_ugid32_out): Disable
gcc-8 string truncation warning.
(swap_linux_prpsinfo32_ugid16_out): Likewise.
(swap_linux_prpsinfo64_ugid32_out): Likewise.
(swap_linux_prpsinfo64_ugid16_out): Likewise.
* elf.c (elfcore_write_prpsinfo): Likewise.
gas/
* stabs.c (generate_asm_file): Use memcpy rather than strncpy.
Remove call to strlen inside loop.
* config/tc-cr16.c (getreg_image): Warning fix.
* config/tc-crx.c (getreg_image): Warning fix.
PR 23054
* cond.c (s_ifsef): Replace use of obstack_copy with obstack_alloc
followed by memcpy.
(s_if, s_ifb, s_ifc, s_ifeqs): Likewise.
* obj-elf.c (elf_adjust_symtab): Check for local symbols before
attempting to dereference the sy_next field of a symbol.
* stabs.c (get_stab_string_offset): Fail if there is no string
following the stab directive.
* read.c (temp_ilp): New function. Installs a temporary input
line pointer.
(restore_ilp): New function. Restores the original input line
pointer.
* read.h (temp_ilp): Prototype.
(restore_ilp): Prototype.
* stabs.c (dot_func_p): Use bfd_boolean type.
(generate_asm_file): Use temp_ilp and restore_ilp.
(stabs_generate_asm_lineno): Likewise.
(stabs_generate_asm_endfunc): Likewise.
various places either directly or indirectly set input_line_pointer to point at
a literal. Currently lots of places modify the string input_line_pointer
points at, so making it const isn't easy. Since most if not all of these
places assign to input_line_pointer to parse an expression it would probably be
best to add ways to generate and deal with expressions that doesn't involve
parsing strings, but for now adding some casts seems easiest.
gas/ChangeLog:
2016-03-31 Trevor Saunders <tbsaunde+binutils@tbsaunde.org>
* config/tc-i960.c (parse_expr): Cast to char * when assigning to
input_line_pointer.
* config/tc-m32r.c (expand_debug_syms): Likewise.
* config/tc-msp430.c (msp430_dstoperand): Likewise.
* config/tc-z80.c (md_begin): Likewise.
* stabs.c (stabs_generate_asm_func): Likewise.
* symbols.c (decode_local_label_name): Make type a const char *.
* listing.c (print_source): Make type of p const char *.
(print_line): Make type of string const char *.
(buffer_line): Return const char *.
(title): Make type const char *.
(subtitle): Likewise.
(listing_listing): Make type of p const char *.
* messages.c (as_internal_value_out_of_range): Make type of prefix
const char *.
* stabs.c (s_stab_generic): make type of stab_secname, stabstr_secname
and string const char *.
* read.c (_bfd_rel): Make type of name const char *.
* app.c (out_string): Change type to const char *.
(struct app_save::out_string): Likewise.
* as.h (rs_dummy): Define.
* symbols.c (symbol_X_add_number): New function.
* symbols.h (symbol_X_add_number): Declare.
* stabs.c (aout_process_stab): Tidy symbol frag setting.
* read.c (assign_symbol): New function, split out from s_set.
Use symbol_find_or_make. Leave fr_type of dummy frag as rs_dummy.
Fix COFF hacks for multi-emulation gas.
(s_set): Call assign_symbol. Remove "register" keyword.
(set_zero_frag): New function.
(pseudo_set): Always check for assignment to section syms.
Always set segment and frag of symbol, and likewise extern for
aout/bout. Handle assignment of sym=sym+/-const specially. Don't
special case exp.X_add_number non-zero for O_symbol expressions.
(equals): Use assign_symbol.
(parse_args) : Accept new --gstabs+ option, and set `use_gnu_debug_info_extensions'.
(show_usage) : Document --gstabs+ option.
* as.h (use_gnu_debug_info_extensions) : New extern declaration.
* stabs.c (stabs_generate_asm_file) : If `use_gnu_debug_info_extensions' is set
add the compilation directory to the stabs debug info.
* doc/as.texinfo : Document --gstabs+ option.
* NEWS: Mention new feature.
