Synchronize libiberty with gcc and add --no-recruse-limit option to tools that support name demangling.

This patch addresses the multitude of bug reports about resource exhaustion
in libiberty's name demangling code.  It adds a limit to the amount of
recursion that is allowed, before an error is triggered.  It also adds a
new demangling option to disable this limit.  (The limit is enabled by
default).

	PR 87681
	PR 87675
	PR 87636
	PR 87335
libiberty * cp-demangle.h (struct d_info): Add recursion_limit field.
	* cp-demangle.c (d_function_type): If the recursion limit is
	enabled and reached, return with a failure result.
        (d_demangle_callback): If the recursion limit is enabled, check
	for a mangled string that is so long that there is not enough
	stack space for the local arrays.
        * cplus-dem.c (struct work): Add recursion_level field.
	(demangle_nested_args): If the recursion limit is enabled and
	reached, return with a failure result.

include	* demangle.h (DMGL_RECURSE_LIMIT): Define.
        (DEMANGLE_RECURSION_LIMIT): Prototype.

binutuils * addr2line.c (demangle_flags): New static variable.
        (long_options): Add --recurse-limit and --no-recurse-limit.
        (translate_address): Pass demangle_flags to bfd_demangle.
        (main): Handle --recurse-limit and --no-recurse-limit options.
        * cxxfilt.c (flags): Add DMGL_RECURSE_LIMIT.
        (long_options): Add --recurse-limit and --no-recurse-limit.
        (main): Handle new options.
        * dlltool.c (gen_def_file): Include DMGL_RECURSE_LIMIT in flags
        passed to cplus_demangle.
        * nm.c (demangle_flags): New static variable.
        (long_options): Add --recurse-limit and --no-recurse-limit.
        (main): Handle new options.
        * objdump.c (demangle_flags): New static variable.
        (usage): Add --recurse-limit and --no-recurse-limit.
        (long_options): Likewise.
        (objdump_print_symname): Pass demangle_flags to bfd_demangle.
        (disassemble_section): Likewise.
        (dump_dymbols): Likewise.
        (main): Handle new options.
        * prdbg.c (demangle_flags): New static variable.
        (tg_variable): Pass demangle_flags to demangler.
        (tg_start_function): Likewise.
        * stabs.c (demangle_flags): New static variable.
        (stab_demangle_template): Pass demangle_flags to demangler.
        (stab_demangle_v3_argtypes): Likewise.
        (stab_demangle_v3_arg): Likewise.
	* doc/binutuls.texi: Document new command line options.
	* NEWS: Mention the new feature.
        * testsuite/config/default.exp (CXXFILT): Define if not already
        defined.
        (CXXFILTFLAGS): Likewise.
        * testsuite/binutils-all/cxxfilt.exp: New file.  Runs a few
        simple tests of the cxxfilt program.

1 files changed, 65 insertions, 0 deletions

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index b9cbee3866f..6859027b683 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,68 @@
+2018-12-07  Nick Clifton  <nickc@redhat.com>
+
+	PR 87681
+	PR 87675
+	PR 87636
+	PR 87350
+	PR 87335
+	* cp-demangle.h (struct d_info): Add recursion_level field.
+	* cp-demangle.c (d_function_type): Add recursion counter.
+	If the recursion limit is reached and the check is not disabled,
+	then return with a failure result.
+	(cplus_demangle_init_info): Initialise the recursion_level field.
+        (d_demangle_callback): If the recursion limit is enabled, check
+	for a mangled string that is so long that there is not enough
+	stack space for the local arrays.
+        * cplus-dem.c (struct work): Add recursion_level field.
+	(squangle_mop_up): Set the numb and numk fields to zero.
+	(work_stuff_copy_to_from): Handle the case where a btypevec or
+	ktypevec field is NULL.
+	(demangle_nested_args): Add recursion counter.  If
+	the recursion limit is not disabled and reached, return with a
+	failure result.
+
+2018-10-23  Jason Merrill  <jason@redhat.com>
+
+	Implement P0732R2, class types in non-type template parameters.
+	* cp-demangle.c (d_dump, d_make_comp, d_count_templates_scopes)
+	(d_print_comp_inner): Handle DEMANGLE_COMPONENT_TPARM_OBJ.
+	(d_special_name): Handle TA.
+	(d_expresion_1): Fix demangling of brace-enclosed initializer list.
+
+2018-10-31  Joseph Myers  <joseph@codesourcery.com>
+
+	PR bootstrap/82856
+	Merge from binutils-gdb:
+	2018-06-19  Simon Marchi  <simon.marchi@ericsson.com>
+
+	* configure.ac: Remove AC_PREREQ.
+	* configure: Re-generate.
+	* config.in: Re-generate.
+
+2018-10-01  Nathan Sidwell  <nathan@acm.org>
+
+	* configure.ac (checkfuncs): Add pipe2.
+	* config.in, configure: Rebuilt.
+	* pex-unix.c (pex_unix_exec_child): Comminicate errors from child
+	to parent with a pipe, when possible.
+
+2018-08-23  Nathan Sidwell  <nathan@acm.org>
+	    Martin Liska  <mliska@suse.cz>
+
+	PR driver/87056
+	* pex-unix.c (pex_unix_exec_child): Duplicate bad_fn into local
+	scopes to avoid potential clobber.
+
+2018-08-20  Nathan Sidwell  <nathan@acm.org>
+
+	* pex-unix.c (pex_child_error): Delete.
+	(pex_unix_exec_child): Commonize error paths to single message &
+	exit.
+
+2018-07-30  Tom Tromey  <tom@tromey.com>
+
+	* cplus-dem.c (remember_Btype): Don't call memcpy with LEN==0.
+
 2018-08-01  Richard Earnshaw  <rearnsha@arm.com>
 
 	Copy over from GCC