gcc/libvtv/vtv_fail.cc

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/* Copyright (C) 2012-2015 Free Software Foundation, Inc.
Commit the vtable verification feature. Commit the vtable verification feature. This feature is designed to detect, at run time, if/when the vtable pointer in a C++ object has been corrupted, before allowing virtual calls through that pointer. If pointer corruption is detected, execution of the program is halted. libstdc++-v3 ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * fragment.am: Add XTEMPLATE_FLAGS. * configure.ac: Add definitions for --enable-vtable-verify. * acinclude.m4: Add --enable-vtable-verify and --disable-vtable-verify; define --enable-vtable-verify; define VTV_CXXFLAGS, VTV_PCH_CXXFLAGS and VTV_CXXLINKFLAGS. * config/abi/pre/gnu.ver: Export symbols for vtable verification. * libsupc++/Makefile.am: Define vtv_sources and add it to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES. * libsupc++/vtv_stubs.cc: New file. * include/Makefile.am: Add VTV_PCH_CXXFLAGS to PCHFLAGS. * src/Makefile.am: Add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXLINKFLAGS to CXXLINK. * src/c++98/Makefile.am: Comment out XTEMPLATE_FLAGS; add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXXLINKFLAGS to CXXLINK. * src/C++11/Makefile.am: Ditto. * doc/xml/manual/configure.xml: Add entry for --enable-vtable-verify. * scripts/testsuite_flags.in: Add cxxvtvflags to Usage; cause cxxvtvflags to use VTV_CXXFLAGS and VTV_CXXLINKFLAGS. * testsuite/lib/libstdc++.exp: Add cxxvtvflags; add code to locate libvtv if --enable-vtable-verify was used; set cxxvtvflags; add cxxvtvflags to cxx_final. * testsuite/18_support/bad_exception/23591_thread-1.c: Add -fvtable-verify=none to compiler flags. * testsuite/17_intro/freestanding.cc: Add -fvtable-verify=none to compiler flags. * configure: Regenerated. * Makefile.in: Regenerated. * python/Makefile.in: Regenerated. * include/Makefile.in: Regenerated. * libsupc++/Makefile.in: Regenerated. * config.h.in: Regenerated. * po/Makefile.in: Regenerated. * src/Makefile.in: Regenerated. * src/c++98/Makefile.in: Regenerated. * src/c++11/Makefile.in: Regenerated. * doc/Makefile.in: Regenerated. * testsuite/Makefile.in: Regenerated. top level ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * configure.ac: Add target-libvtv to target_libraries; disable libvtv on non-linux systems; add target-libvtv to noconfigdirs; add libsupc++/.libs to C++ library search paths. * configure: Regenerated. * Makefile.def: Add libvtv to target_modules; make libvtv depend on libstdc++ and libgcc. * Makefile.in: Regenerated. include/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * vtv-change-permission.h: New file. contrib/ChangeLog: 2013-08-06 Caroline Tice4 <cmtice@google.com> * gcc_update: Add libvtv files. libgcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> config.host (extra_parts): Add vtv_start.o, vtv_end.o vtv_start_preinit.o and vtv_end_preinit.o. configure.ac: Add code to check/set enable_vtable_verify. Makefile.in: Add rules to build vtv_*.o, if enable_vtable_verify is true. vtv_start_preinit.c: New file. vtv_end_preinit.c: New file. vtv_start.c: New file. vtv_end.c: New file. configure: Regenerated. gcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * gcc.c (VTABLE_VERIFICATION_SPEC): New definition. (LINK_COMMAND_SPEC): Add VTABLE_VERIFICATION_SPEC. * tree-pass.h: Add pass_vtable_verify. * varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section. (assemble_vtyv_preinit_initializer): New function. (default_sectin_type_flags): Make sure .vtable_map_vars section has LINK_ONCE flag. * output.h: Add function decl for assemble_vtv_preinit_initializer. * vtable-verify.c: New file. * vtable-verify.h: New file. * flag-types.h (enum vtv_priority): Defintions for flag_vtable_verify initialiation levels. * timevar.def (TV_VTABLE_VERIFICATION): New definition. * passes.def: Insert pass_vtable_verify. * aclocal.m4: Reorder includes. * doc/invoke.texi: Add documentation for the flags -fvtable-verify=, -fvtv-debug and -fvtv-counts. * config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Add vtv_start*.o, as appropriate, if -fvtable-verify=... is used. (GNU_USER_TARGET_ENDFILE_SPEC): Add vtv_end*.o as appropriate, if -fvtable-verify=... is used. * Makefile.in (OBJS): Add vtable-verify.o to list. (vtable-verify.o): Add new build rule. (GTFILES): Add vtable-verify.c to list. * common.opt (fvtable-verify=): New flag. (vtv_priority): Values for fvtable-verify= flag. (fvtv-counts): New flag. (fvtv-debug): New flag. * tree.h (save_vtable_map_decl): New extern function decl. gcc/cp/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * Make-lang.in (*CXX_AND_OBJCXX_OBJS): Add vtable-class-hierarchy.o to list. (vtable-class-hierarchy.o): Add build rule. * cp-tree.h (vtv_start_verification_constructor_init_function): New extern function decl. (vtv_finish_verification_constructor_init_function): New extern function decl. (build_vtbl_address): New extern function decl. (get_mangled_vtable_map_var_name): New extern function decl. (vtv_compute_class_hierarchy_transitive_closure): New extern function decl. (vtv_generate_init_routine): New extern function decl. (vtv_save_class_info): New extern function decl. (vtv_recover_class_info): New extern function decl. (vtv_build_vtable_verify_fndecl): New extern function decl. * class.c (finish_struct_1): Add call to vtv_save_class_info if flag_vtable_verify is true. * config-lang.in: Add vtable-class-hierarchy.c to gtfiles list. * vtable-class-hierarchy.c: New file. * mangle.c (get_mangled_vtable_map_var_name): New function. * decl2.c (start_objects): Update function comment. (cp_write_global_declarations): Call vtv_recover_class_info, vtv_compute_class_hierarchy_transitive_closure and vtv_build_vtable_verify_fndecl, before calling finalize_compilation_unit, and call vtv_generate_init_rount after, IFF flag_vtable_verify is true. (vtv_start_verification_constructor_init_function): New function. (vtv_finish_verification_constructor_init_function): New function. * init.c (build_vtbl_address): Remove static qualifier from function. libvtv/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> Initial check-in of new vtable verification feature. * configure.ac : New file. * acinclude.m4 : New file. * Makefile.am : New file. * aclocal.m4 : New file. * configure.tgt : New file. * configure: New file (generated). * Makefile.in: New file (generated). * vtv_set.h : New file. * vtv_utils.cc : New file. * vtv_utils.h : New file. * vtv_malloc.cc : New file. * vtv_rts.cc : New file. * vtv_malloc.h : New file. * vtv_rts.h : New file. * vtv_fail.cc : New file. * vtv_fail.h : New file. * vtv_map.h : New file. * scripts/run-testsuite.sh : New file. * scripts/sum-vtv-counts.c : New file. * testsuite/parts-test-main.h : New file. * testusite/dataentry.cc : New file. * testsuite/temp_deriv.cc : New file. * testsuite/register_pair.cc : New file. * testsuite/virtual_inheritance.cc : New file. * testsuite/field-test.cc : New file. * testsuite/nested_vcall_test.cc : New file. * testsuite/template-list-iostream.cc : New file. * testsuite/register_pair_inserts.cc : New file. * testsuite/register_pair_inserts_mt.cc : New file. * testsuite/event.list : New file. * testsuite/parts-test-extra-parts-views.cc : New file. * testsuite/parts-test-extra-parts-views.h : New file. * testsuite/environment-fail-32.s : New file. * testsuite/parts-test-extra-parts.h : New file. * testsuite/temp_deriv2.cc : New file. * testsuite/dlopen_mt.cc : New file. * testsuite/event.h : New file. * testsuite/template-list.cc : New file. * testsuite/replace-fail.cc : New file. * testsuite/Makefile.am : New file. * testsuite/Makefile.in: New file (generated). * testsuite/mempool_negative.c : New file. * testsuite/parts-test-main.cc : New file. * testsuite/event-private.cc : New file. * testsuite/thunk.cc : New file. * testsuite/event-defintiions.cc : New file. * testsuite/event-private.h : New file. * testsuite/parts-test.list : New file. * testusite/register_pair_mt.cc : New file. * testsuite/povray-derived.cc : New file. * testsuite/event-main.cc : New file. * testsuite/environment.cc : New file. * testsuite/template-list2.cc : New file. * testsuite/thunk_vtable_map_attack.cc : New file. * testsuite/parts-test-extra-parts.cc : New file. * testsuite/environment-fail-64.s : New file. * testsuite/dlopen.cc : New file. * testsuite/so.cc : New file. * testsuite/temp_deriv3.cc : New file. * testsuite/const_vtable.cc : New file. * testsuite/mempool_positive.c : New file. * testsuite/dup_name.cc : New file. From-SVN: r201555
2013-08-07 05:38:59 +02:00
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* This file is part of the vtable security feature implementation.
The vtable security feature is designed to detect when a virtual
call is about to be made through an invalid vtable pointer
(possibly due to data corruption or malicious attacks).
This file also contains the failure functions that get called when
a vtable pointer is not found in the data set. Two particularly
important functions are __vtv_verify_fail and __vtv_really_fail.
They are both externally visible. __vtv_verify_fail is defined in
such a way that it can be replaced by a programmer, if desired. It
is the function that __VLTVerifyVtablePointer calls if it can't
find the pointer in the data set. Allowing the programmer to
overwrite this function means that he/she can do some alternate
verification, including NOT failing in certain specific cases, if
desired. This may be the case if the programmer has to deal wtih
unverified third party software, for example. __vtv_really_fail is
available for the programmer to call from his version of
__vtv_verify_fail, if he decides the failure is real.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
Committing VTV Cygwin patch for Patrick Wollgast * gcc/config/i386/cygwin.h (STARTFILE_SPEC): Add vtv_start.o, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw-w64.h (STARTFILE_SPEC): Likewise. * gcc/config/i386/mingw32.h (STARTFILE_SPEC): Likewise. * gcc/config/i386/cygwin.h (ENDFILE_SPEC): Add vtv_end.o, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw32.h (ENDFILE_SPEC): Likewise. * gcc/config/i386/cygwin.h (LIB_SPEC): Pass -lvtv and -lpsapi, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw-w64.h (LIB_SPEC): Likewise. * gcc/config/i386/mingw32.h (LIB_SPEC): Likewise. * gcc/cp/vtable-class-hierarchy.c (vtv_generate_init_routine): Add check for not TARGET_PECOFF at the VTV_PREINIT_PRIORITY checks. * gcc/varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section in case the target is PE or COFF. * libgcc/Makefile.in: Move rules to build vtv_*.o out of the check for CUSTOM_CRTSTUFF. * libgcc/config.host (i[34567]86-*-cygwin*, x86_64-*-cygwin*, i[34567]86-*-mingw*) (x86_64-*-mingw*): Only add vtv_*.o to extra_parts if enable_vtable_verify. * libstdc++-v3/acinclude.m4: Define VTV_CYGMIN. * libstdc++-v3/configure: Regenerate. * libstdc++-v3/libsupc++/Makefile.am: Add vtv_sources only to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES if VTV_CYGMIN is not set. * libstdc++-v3/libsupc++/Makefile.in: Regenerated. * libstdc++-v3/libsupc++/vtv_stubs.cc: Add none weak declaration of every function for Cygwin and MinGW. * libstdc++-v3/src/Makefile.am: Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN is set. Define libvtv_la_SOURCES, libvtv_la_LDFLAGS, libvtv_la_AM_CXXFLAGS and libvtv_la_LINK if VTV_CYGMIN is set. * libstdc++-v3/src/Makefile.in: Regenerate. * libvtv/Makefile.am : Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN is set. Define libvtv_la_LIBADD, libvtv_la_LDFLAGS, libvtv_stubs_la_LDFLAGS and libvtv_stubs_la_SOURCES if VTV_CYGMIN is set. Add obstac.c to libvtv_la_SOURCES if VTV_CYGMIN is set. * libvtv/Makefile.in : Regenerate. * libvtv/aclocal.m4 : Regenerate. * libvtv/configure : Regenerate. * libvtv/configure.ac : Add ACX_LT_HOST_FLAGS. Define VTV_CYGMIN. * libvtv/configure.tgt : (x86_64-*-cygwin*, i?86-*-cygwin*, x86_64-*-mingw*) (i?86-*-mingw*): Add to supported targets. * libvtv/vtv_fail.cc : Skip inclusion of execinfo.h on Cygwin and MinGW. (log_error_message): Skip calls to backtrace and backtrace_symbols_fd on Cygwin and MinGW. * libvtv/vtv_malloc.cc : Include windows.h and skip sys/mman.h inclusion on Cygwin and MinGW. Add sysconf port on Cygwin and MinGW. (obstack_chunk_alloc): Exchange call to mmap with call to VirtualAlloc on Cygwin and MinGW. (__vtv_malloc_init): Exchange call to sysconf with call to port of sysconf on Cygwin and MinGW. * libvtv/vtv_malloc.h : Declare mprotect and define PROT_READ and PROT_WRITE on Cygwin and MinGW. * libvtv/map.h : Include stdint.h on MinGW. * libvtv/rts.cc : Include windows.h, winternl.h and psapi.h, skip include of execinfo.h, sys/mman.h and link.h on Cygwin and MinGW. Add port of __fortify_fail on Cygwin and MinGW. Change ElfW (Addr) to uintptr_t on Cygwin and MinGW. (read_section_offset_and_length): Add port for Cygwin and MinGW (iterate_modules): New function. (vtv_unprotect_vtable_vars): Use iterate_modules instead of dl_iterate_phdr on Cygwin and MinGW. (vtv_protect_vtable_vars): Likewise. (count_all_pages): Likewise. (dl_iterate_phdr_count_pages): Don't build on Cygwin and MinGW. * libvtv/utils.cc : Include windows.h and skip execinfo.h inclusion on Cygwin and MinGW. (__vtv_open_log): Exchange call to getuid and getpid with GetCurrentProcessId and adjust call to snprintf accordingly on Cygwin and MinGW. Adjust calls to mkdir on MinGW. Adjust call to open on Cygwin and MinGW. (__vtv_add_to_log): Adjust call to snprintf on Cygwin and MinGW. (__vtv_log_verification_failure): Don't generate a backtrace on Cygwin and MinGW. From-SVN: r220232
2015-01-29 09:03:56 +01:00
#if !defined (__CYGWIN__) && !defined (__MINGW32__)
Commit the vtable verification feature. Commit the vtable verification feature. This feature is designed to detect, at run time, if/when the vtable pointer in a C++ object has been corrupted, before allowing virtual calls through that pointer. If pointer corruption is detected, execution of the program is halted. libstdc++-v3 ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * fragment.am: Add XTEMPLATE_FLAGS. * configure.ac: Add definitions for --enable-vtable-verify. * acinclude.m4: Add --enable-vtable-verify and --disable-vtable-verify; define --enable-vtable-verify; define VTV_CXXFLAGS, VTV_PCH_CXXFLAGS and VTV_CXXLINKFLAGS. * config/abi/pre/gnu.ver: Export symbols for vtable verification. * libsupc++/Makefile.am: Define vtv_sources and add it to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES. * libsupc++/vtv_stubs.cc: New file. * include/Makefile.am: Add VTV_PCH_CXXFLAGS to PCHFLAGS. * src/Makefile.am: Add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXLINKFLAGS to CXXLINK. * src/c++98/Makefile.am: Comment out XTEMPLATE_FLAGS; add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXXLINKFLAGS to CXXLINK. * src/C++11/Makefile.am: Ditto. * doc/xml/manual/configure.xml: Add entry for --enable-vtable-verify. * scripts/testsuite_flags.in: Add cxxvtvflags to Usage; cause cxxvtvflags to use VTV_CXXFLAGS and VTV_CXXLINKFLAGS. * testsuite/lib/libstdc++.exp: Add cxxvtvflags; add code to locate libvtv if --enable-vtable-verify was used; set cxxvtvflags; add cxxvtvflags to cxx_final. * testsuite/18_support/bad_exception/23591_thread-1.c: Add -fvtable-verify=none to compiler flags. * testsuite/17_intro/freestanding.cc: Add -fvtable-verify=none to compiler flags. * configure: Regenerated. * Makefile.in: Regenerated. * python/Makefile.in: Regenerated. * include/Makefile.in: Regenerated. * libsupc++/Makefile.in: Regenerated. * config.h.in: Regenerated. * po/Makefile.in: Regenerated. * src/Makefile.in: Regenerated. * src/c++98/Makefile.in: Regenerated. * src/c++11/Makefile.in: Regenerated. * doc/Makefile.in: Regenerated. * testsuite/Makefile.in: Regenerated. top level ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * configure.ac: Add target-libvtv to target_libraries; disable libvtv on non-linux systems; add target-libvtv to noconfigdirs; add libsupc++/.libs to C++ library search paths. * configure: Regenerated. * Makefile.def: Add libvtv to target_modules; make libvtv depend on libstdc++ and libgcc. * Makefile.in: Regenerated. include/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * vtv-change-permission.h: New file. contrib/ChangeLog: 2013-08-06 Caroline Tice4 <cmtice@google.com> * gcc_update: Add libvtv files. libgcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> config.host (extra_parts): Add vtv_start.o, vtv_end.o vtv_start_preinit.o and vtv_end_preinit.o. configure.ac: Add code to check/set enable_vtable_verify. Makefile.in: Add rules to build vtv_*.o, if enable_vtable_verify is true. vtv_start_preinit.c: New file. vtv_end_preinit.c: New file. vtv_start.c: New file. vtv_end.c: New file. configure: Regenerated. gcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * gcc.c (VTABLE_VERIFICATION_SPEC): New definition. (LINK_COMMAND_SPEC): Add VTABLE_VERIFICATION_SPEC. * tree-pass.h: Add pass_vtable_verify. * varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section. (assemble_vtyv_preinit_initializer): New function. (default_sectin_type_flags): Make sure .vtable_map_vars section has LINK_ONCE flag. * output.h: Add function decl for assemble_vtv_preinit_initializer. * vtable-verify.c: New file. * vtable-verify.h: New file. * flag-types.h (enum vtv_priority): Defintions for flag_vtable_verify initialiation levels. * timevar.def (TV_VTABLE_VERIFICATION): New definition. * passes.def: Insert pass_vtable_verify. * aclocal.m4: Reorder includes. * doc/invoke.texi: Add documentation for the flags -fvtable-verify=, -fvtv-debug and -fvtv-counts. * config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Add vtv_start*.o, as appropriate, if -fvtable-verify=... is used. (GNU_USER_TARGET_ENDFILE_SPEC): Add vtv_end*.o as appropriate, if -fvtable-verify=... is used. * Makefile.in (OBJS): Add vtable-verify.o to list. (vtable-verify.o): Add new build rule. (GTFILES): Add vtable-verify.c to list. * common.opt (fvtable-verify=): New flag. (vtv_priority): Values for fvtable-verify= flag. (fvtv-counts): New flag. (fvtv-debug): New flag. * tree.h (save_vtable_map_decl): New extern function decl. gcc/cp/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * Make-lang.in (*CXX_AND_OBJCXX_OBJS): Add vtable-class-hierarchy.o to list. (vtable-class-hierarchy.o): Add build rule. * cp-tree.h (vtv_start_verification_constructor_init_function): New extern function decl. (vtv_finish_verification_constructor_init_function): New extern function decl. (build_vtbl_address): New extern function decl. (get_mangled_vtable_map_var_name): New extern function decl. (vtv_compute_class_hierarchy_transitive_closure): New extern function decl. (vtv_generate_init_routine): New extern function decl. (vtv_save_class_info): New extern function decl. (vtv_recover_class_info): New extern function decl. (vtv_build_vtable_verify_fndecl): New extern function decl. * class.c (finish_struct_1): Add call to vtv_save_class_info if flag_vtable_verify is true. * config-lang.in: Add vtable-class-hierarchy.c to gtfiles list. * vtable-class-hierarchy.c: New file. * mangle.c (get_mangled_vtable_map_var_name): New function. * decl2.c (start_objects): Update function comment. (cp_write_global_declarations): Call vtv_recover_class_info, vtv_compute_class_hierarchy_transitive_closure and vtv_build_vtable_verify_fndecl, before calling finalize_compilation_unit, and call vtv_generate_init_rount after, IFF flag_vtable_verify is true. (vtv_start_verification_constructor_init_function): New function. (vtv_finish_verification_constructor_init_function): New function. * init.c (build_vtbl_address): Remove static qualifier from function. libvtv/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> Initial check-in of new vtable verification feature. * configure.ac : New file. * acinclude.m4 : New file. * Makefile.am : New file. * aclocal.m4 : New file. * configure.tgt : New file. * configure: New file (generated). * Makefile.in: New file (generated). * vtv_set.h : New file. * vtv_utils.cc : New file. * vtv_utils.h : New file. * vtv_malloc.cc : New file. * vtv_rts.cc : New file. * vtv_malloc.h : New file. * vtv_rts.h : New file. * vtv_fail.cc : New file. * vtv_fail.h : New file. * vtv_map.h : New file. * scripts/run-testsuite.sh : New file. * scripts/sum-vtv-counts.c : New file. * testsuite/parts-test-main.h : New file. * testusite/dataentry.cc : New file. * testsuite/temp_deriv.cc : New file. * testsuite/register_pair.cc : New file. * testsuite/virtual_inheritance.cc : New file. * testsuite/field-test.cc : New file. * testsuite/nested_vcall_test.cc : New file. * testsuite/template-list-iostream.cc : New file. * testsuite/register_pair_inserts.cc : New file. * testsuite/register_pair_inserts_mt.cc : New file. * testsuite/event.list : New file. * testsuite/parts-test-extra-parts-views.cc : New file. * testsuite/parts-test-extra-parts-views.h : New file. * testsuite/environment-fail-32.s : New file. * testsuite/parts-test-extra-parts.h : New file. * testsuite/temp_deriv2.cc : New file. * testsuite/dlopen_mt.cc : New file. * testsuite/event.h : New file. * testsuite/template-list.cc : New file. * testsuite/replace-fail.cc : New file. * testsuite/Makefile.am : New file. * testsuite/Makefile.in: New file (generated). * testsuite/mempool_negative.c : New file. * testsuite/parts-test-main.cc : New file. * testsuite/event-private.cc : New file. * testsuite/thunk.cc : New file. * testsuite/event-defintiions.cc : New file. * testsuite/event-private.h : New file. * testsuite/parts-test.list : New file. * testusite/register_pair_mt.cc : New file. * testsuite/povray-derived.cc : New file. * testsuite/event-main.cc : New file. * testsuite/environment.cc : New file. * testsuite/template-list2.cc : New file. * testsuite/thunk_vtable_map_attack.cc : New file. * testsuite/parts-test-extra-parts.cc : New file. * testsuite/environment-fail-64.s : New file. * testsuite/dlopen.cc : New file. * testsuite/so.cc : New file. * testsuite/temp_deriv3.cc : New file. * testsuite/const_vtable.cc : New file. * testsuite/mempool_positive.c : New file. * testsuite/dup_name.cc : New file. From-SVN: r201555
2013-08-07 05:38:59 +02:00
#include <execinfo.h>
Committing VTV Cygwin patch for Patrick Wollgast * gcc/config/i386/cygwin.h (STARTFILE_SPEC): Add vtv_start.o, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw-w64.h (STARTFILE_SPEC): Likewise. * gcc/config/i386/mingw32.h (STARTFILE_SPEC): Likewise. * gcc/config/i386/cygwin.h (ENDFILE_SPEC): Add vtv_end.o, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw32.h (ENDFILE_SPEC): Likewise. * gcc/config/i386/cygwin.h (LIB_SPEC): Pass -lvtv and -lpsapi, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw-w64.h (LIB_SPEC): Likewise. * gcc/config/i386/mingw32.h (LIB_SPEC): Likewise. * gcc/cp/vtable-class-hierarchy.c (vtv_generate_init_routine): Add check for not TARGET_PECOFF at the VTV_PREINIT_PRIORITY checks. * gcc/varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section in case the target is PE or COFF. * libgcc/Makefile.in: Move rules to build vtv_*.o out of the check for CUSTOM_CRTSTUFF. * libgcc/config.host (i[34567]86-*-cygwin*, x86_64-*-cygwin*, i[34567]86-*-mingw*) (x86_64-*-mingw*): Only add vtv_*.o to extra_parts if enable_vtable_verify. * libstdc++-v3/acinclude.m4: Define VTV_CYGMIN. * libstdc++-v3/configure: Regenerate. * libstdc++-v3/libsupc++/Makefile.am: Add vtv_sources only to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES if VTV_CYGMIN is not set. * libstdc++-v3/libsupc++/Makefile.in: Regenerated. * libstdc++-v3/libsupc++/vtv_stubs.cc: Add none weak declaration of every function for Cygwin and MinGW. * libstdc++-v3/src/Makefile.am: Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN is set. Define libvtv_la_SOURCES, libvtv_la_LDFLAGS, libvtv_la_AM_CXXFLAGS and libvtv_la_LINK if VTV_CYGMIN is set. * libstdc++-v3/src/Makefile.in: Regenerate. * libvtv/Makefile.am : Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN is set. Define libvtv_la_LIBADD, libvtv_la_LDFLAGS, libvtv_stubs_la_LDFLAGS and libvtv_stubs_la_SOURCES if VTV_CYGMIN is set. Add obstac.c to libvtv_la_SOURCES if VTV_CYGMIN is set. * libvtv/Makefile.in : Regenerate. * libvtv/aclocal.m4 : Regenerate. * libvtv/configure : Regenerate. * libvtv/configure.ac : Add ACX_LT_HOST_FLAGS. Define VTV_CYGMIN. * libvtv/configure.tgt : (x86_64-*-cygwin*, i?86-*-cygwin*, x86_64-*-mingw*) (i?86-*-mingw*): Add to supported targets. * libvtv/vtv_fail.cc : Skip inclusion of execinfo.h on Cygwin and MinGW. (log_error_message): Skip calls to backtrace and backtrace_symbols_fd on Cygwin and MinGW. * libvtv/vtv_malloc.cc : Include windows.h and skip sys/mman.h inclusion on Cygwin and MinGW. Add sysconf port on Cygwin and MinGW. (obstack_chunk_alloc): Exchange call to mmap with call to VirtualAlloc on Cygwin and MinGW. (__vtv_malloc_init): Exchange call to sysconf with call to port of sysconf on Cygwin and MinGW. * libvtv/vtv_malloc.h : Declare mprotect and define PROT_READ and PROT_WRITE on Cygwin and MinGW. * libvtv/map.h : Include stdint.h on MinGW. * libvtv/rts.cc : Include windows.h, winternl.h and psapi.h, skip include of execinfo.h, sys/mman.h and link.h on Cygwin and MinGW. Add port of __fortify_fail on Cygwin and MinGW. Change ElfW (Addr) to uintptr_t on Cygwin and MinGW. (read_section_offset_and_length): Add port for Cygwin and MinGW (iterate_modules): New function. (vtv_unprotect_vtable_vars): Use iterate_modules instead of dl_iterate_phdr on Cygwin and MinGW. (vtv_protect_vtable_vars): Likewise. (count_all_pages): Likewise. (dl_iterate_phdr_count_pages): Don't build on Cygwin and MinGW. * libvtv/utils.cc : Include windows.h and skip execinfo.h inclusion on Cygwin and MinGW. (__vtv_open_log): Exchange call to getuid and getpid with GetCurrentProcessId and adjust call to snprintf accordingly on Cygwin and MinGW. Adjust calls to mkdir on MinGW. Adjust call to open on Cygwin and MinGW. (__vtv_add_to_log): Adjust call to snprintf on Cygwin and MinGW. (__vtv_log_verification_failure): Don't generate a backtrace on Cygwin and MinGW. From-SVN: r220232
2015-01-29 09:03:56 +01:00
#endif
Commit the vtable verification feature. Commit the vtable verification feature. This feature is designed to detect, at run time, if/when the vtable pointer in a C++ object has been corrupted, before allowing virtual calls through that pointer. If pointer corruption is detected, execution of the program is halted. libstdc++-v3 ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * fragment.am: Add XTEMPLATE_FLAGS. * configure.ac: Add definitions for --enable-vtable-verify. * acinclude.m4: Add --enable-vtable-verify and --disable-vtable-verify; define --enable-vtable-verify; define VTV_CXXFLAGS, VTV_PCH_CXXFLAGS and VTV_CXXLINKFLAGS. * config/abi/pre/gnu.ver: Export symbols for vtable verification. * libsupc++/Makefile.am: Define vtv_sources and add it to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES. * libsupc++/vtv_stubs.cc: New file. * include/Makefile.am: Add VTV_PCH_CXXFLAGS to PCHFLAGS. * src/Makefile.am: Add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXLINKFLAGS to CXXLINK. * src/c++98/Makefile.am: Comment out XTEMPLATE_FLAGS; add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXXLINKFLAGS to CXXLINK. * src/C++11/Makefile.am: Ditto. * doc/xml/manual/configure.xml: Add entry for --enable-vtable-verify. * scripts/testsuite_flags.in: Add cxxvtvflags to Usage; cause cxxvtvflags to use VTV_CXXFLAGS and VTV_CXXLINKFLAGS. * testsuite/lib/libstdc++.exp: Add cxxvtvflags; add code to locate libvtv if --enable-vtable-verify was used; set cxxvtvflags; add cxxvtvflags to cxx_final. * testsuite/18_support/bad_exception/23591_thread-1.c: Add -fvtable-verify=none to compiler flags. * testsuite/17_intro/freestanding.cc: Add -fvtable-verify=none to compiler flags. * configure: Regenerated. * Makefile.in: Regenerated. * python/Makefile.in: Regenerated. * include/Makefile.in: Regenerated. * libsupc++/Makefile.in: Regenerated. * config.h.in: Regenerated. * po/Makefile.in: Regenerated. * src/Makefile.in: Regenerated. * src/c++98/Makefile.in: Regenerated. * src/c++11/Makefile.in: Regenerated. * doc/Makefile.in: Regenerated. * testsuite/Makefile.in: Regenerated. top level ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * configure.ac: Add target-libvtv to target_libraries; disable libvtv on non-linux systems; add target-libvtv to noconfigdirs; add libsupc++/.libs to C++ library search paths. * configure: Regenerated. * Makefile.def: Add libvtv to target_modules; make libvtv depend on libstdc++ and libgcc. * Makefile.in: Regenerated. include/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * vtv-change-permission.h: New file. contrib/ChangeLog: 2013-08-06 Caroline Tice4 <cmtice@google.com> * gcc_update: Add libvtv files. libgcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> config.host (extra_parts): Add vtv_start.o, vtv_end.o vtv_start_preinit.o and vtv_end_preinit.o. configure.ac: Add code to check/set enable_vtable_verify. Makefile.in: Add rules to build vtv_*.o, if enable_vtable_verify is true. vtv_start_preinit.c: New file. vtv_end_preinit.c: New file. vtv_start.c: New file. vtv_end.c: New file. configure: Regenerated. gcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * gcc.c (VTABLE_VERIFICATION_SPEC): New definition. (LINK_COMMAND_SPEC): Add VTABLE_VERIFICATION_SPEC. * tree-pass.h: Add pass_vtable_verify. * varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section. (assemble_vtyv_preinit_initializer): New function. (default_sectin_type_flags): Make sure .vtable_map_vars section has LINK_ONCE flag. * output.h: Add function decl for assemble_vtv_preinit_initializer. * vtable-verify.c: New file. * vtable-verify.h: New file. * flag-types.h (enum vtv_priority): Defintions for flag_vtable_verify initialiation levels. * timevar.def (TV_VTABLE_VERIFICATION): New definition. * passes.def: Insert pass_vtable_verify. * aclocal.m4: Reorder includes. * doc/invoke.texi: Add documentation for the flags -fvtable-verify=, -fvtv-debug and -fvtv-counts. * config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Add vtv_start*.o, as appropriate, if -fvtable-verify=... is used. (GNU_USER_TARGET_ENDFILE_SPEC): Add vtv_end*.o as appropriate, if -fvtable-verify=... is used. * Makefile.in (OBJS): Add vtable-verify.o to list. (vtable-verify.o): Add new build rule. (GTFILES): Add vtable-verify.c to list. * common.opt (fvtable-verify=): New flag. (vtv_priority): Values for fvtable-verify= flag. (fvtv-counts): New flag. (fvtv-debug): New flag. * tree.h (save_vtable_map_decl): New extern function decl. gcc/cp/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * Make-lang.in (*CXX_AND_OBJCXX_OBJS): Add vtable-class-hierarchy.o to list. (vtable-class-hierarchy.o): Add build rule. * cp-tree.h (vtv_start_verification_constructor_init_function): New extern function decl. (vtv_finish_verification_constructor_init_function): New extern function decl. (build_vtbl_address): New extern function decl. (get_mangled_vtable_map_var_name): New extern function decl. (vtv_compute_class_hierarchy_transitive_closure): New extern function decl. (vtv_generate_init_routine): New extern function decl. (vtv_save_class_info): New extern function decl. (vtv_recover_class_info): New extern function decl. (vtv_build_vtable_verify_fndecl): New extern function decl. * class.c (finish_struct_1): Add call to vtv_save_class_info if flag_vtable_verify is true. * config-lang.in: Add vtable-class-hierarchy.c to gtfiles list. * vtable-class-hierarchy.c: New file. * mangle.c (get_mangled_vtable_map_var_name): New function. * decl2.c (start_objects): Update function comment. (cp_write_global_declarations): Call vtv_recover_class_info, vtv_compute_class_hierarchy_transitive_closure and vtv_build_vtable_verify_fndecl, before calling finalize_compilation_unit, and call vtv_generate_init_rount after, IFF flag_vtable_verify is true. (vtv_start_verification_constructor_init_function): New function. (vtv_finish_verification_constructor_init_function): New function. * init.c (build_vtbl_address): Remove static qualifier from function. libvtv/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> Initial check-in of new vtable verification feature. * configure.ac : New file. * acinclude.m4 : New file. * Makefile.am : New file. * aclocal.m4 : New file. * configure.tgt : New file. * configure: New file (generated). * Makefile.in: New file (generated). * vtv_set.h : New file. * vtv_utils.cc : New file. * vtv_utils.h : New file. * vtv_malloc.cc : New file. * vtv_rts.cc : New file. * vtv_malloc.h : New file. * vtv_rts.h : New file. * vtv_fail.cc : New file. * vtv_fail.h : New file. * vtv_map.h : New file. * scripts/run-testsuite.sh : New file. * scripts/sum-vtv-counts.c : New file. * testsuite/parts-test-main.h : New file. * testusite/dataentry.cc : New file. * testsuite/temp_deriv.cc : New file. * testsuite/register_pair.cc : New file. * testsuite/virtual_inheritance.cc : New file. * testsuite/field-test.cc : New file. * testsuite/nested_vcall_test.cc : New file. * testsuite/template-list-iostream.cc : New file. * testsuite/register_pair_inserts.cc : New file. * testsuite/register_pair_inserts_mt.cc : New file. * testsuite/event.list : New file. * testsuite/parts-test-extra-parts-views.cc : New file. * testsuite/parts-test-extra-parts-views.h : New file. * testsuite/environment-fail-32.s : New file. * testsuite/parts-test-extra-parts.h : New file. * testsuite/temp_deriv2.cc : New file. * testsuite/dlopen_mt.cc : New file. * testsuite/event.h : New file. * testsuite/template-list.cc : New file. * testsuite/replace-fail.cc : New file. * testsuite/Makefile.am : New file. * testsuite/Makefile.in: New file (generated). * testsuite/mempool_negative.c : New file. * testsuite/parts-test-main.cc : New file. * testsuite/event-private.cc : New file. * testsuite/thunk.cc : New file. * testsuite/event-defintiions.cc : New file. * testsuite/event-private.h : New file. * testsuite/parts-test.list : New file. * testusite/register_pair_mt.cc : New file. * testsuite/povray-derived.cc : New file. * testsuite/event-main.cc : New file. * testsuite/environment.cc : New file. * testsuite/template-list2.cc : New file. * testsuite/thunk_vtable_map_attack.cc : New file. * testsuite/parts-test-extra-parts.cc : New file. * testsuite/environment-fail-64.s : New file. * testsuite/dlopen.cc : New file. * testsuite/so.cc : New file. * testsuite/temp_deriv3.cc : New file. * testsuite/const_vtable.cc : New file. * testsuite/mempool_positive.c : New file. * testsuite/dup_name.cc : New file. From-SVN: r201555
2013-08-07 05:38:59 +02:00
#include <unistd.h>
#include "vtv_utils.h"
#include "vtv_fail.h"
/* This is used to disable aborts for debugging purposes. */
bool vtv_no_abort = false;
extern "C" {
/* __fortify_fail is a function in glibc that calls __libc_message,
causing it to print out a program termination error message
(including the name of the binary being terminated), a stack
trace where the error occurred, and a memory map dump. Ideally
we would have called __libc_message directly, but that function
does not appear to be accessible to functions outside glibc,
whereas __fortify_fail is. We call __fortify_fail from
__vtv_really_fail. We looked at calling __libc_fatal, which is
externally accessible, but it does not do the back trace and
memory dump. */
extern void __fortify_fail (const char *) __attribute__((noreturn));
} /* extern "C" */
const unsigned long SET_HANDLE_HANDLE_BIT = 0x2;
/* Instantiate the template classes (in vtv_set.h) for our particular
hash table needs. */
typedef void * vtv_set_handle;
typedef vtv_set_handle * vtv_set_handle_handle;
static int vtv_failures_log_fd = -1;
/* Open error logging file, if not already open, and write vtable
verification failure messages (LOG_MSG) to the log file. Also
generate a backtrace in the log file, if GENERATE_BACKTRACE is
set. */
static void
log_error_message (const char *log_msg, bool generate_backtrace)
{
if (vtv_failures_log_fd == -1)
vtv_failures_log_fd = vtv_open_log ("vtable_verification_failures.log");
if (vtv_failures_log_fd == -1)
return;
vtv_add_to_log (vtv_failures_log_fd, "%s", log_msg);
if (generate_backtrace)
{
#define STACK_DEPTH 20
void *callers[STACK_DEPTH];
Committing VTV Cygwin patch for Patrick Wollgast * gcc/config/i386/cygwin.h (STARTFILE_SPEC): Add vtv_start.o, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw-w64.h (STARTFILE_SPEC): Likewise. * gcc/config/i386/mingw32.h (STARTFILE_SPEC): Likewise. * gcc/config/i386/cygwin.h (ENDFILE_SPEC): Add vtv_end.o, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw32.h (ENDFILE_SPEC): Likewise. * gcc/config/i386/cygwin.h (LIB_SPEC): Pass -lvtv and -lpsapi, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw-w64.h (LIB_SPEC): Likewise. * gcc/config/i386/mingw32.h (LIB_SPEC): Likewise. * gcc/cp/vtable-class-hierarchy.c (vtv_generate_init_routine): Add check for not TARGET_PECOFF at the VTV_PREINIT_PRIORITY checks. * gcc/varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section in case the target is PE or COFF. * libgcc/Makefile.in: Move rules to build vtv_*.o out of the check for CUSTOM_CRTSTUFF. * libgcc/config.host (i[34567]86-*-cygwin*, x86_64-*-cygwin*, i[34567]86-*-mingw*) (x86_64-*-mingw*): Only add vtv_*.o to extra_parts if enable_vtable_verify. * libstdc++-v3/acinclude.m4: Define VTV_CYGMIN. * libstdc++-v3/configure: Regenerate. * libstdc++-v3/libsupc++/Makefile.am: Add vtv_sources only to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES if VTV_CYGMIN is not set. * libstdc++-v3/libsupc++/Makefile.in: Regenerated. * libstdc++-v3/libsupc++/vtv_stubs.cc: Add none weak declaration of every function for Cygwin and MinGW. * libstdc++-v3/src/Makefile.am: Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN is set. Define libvtv_la_SOURCES, libvtv_la_LDFLAGS, libvtv_la_AM_CXXFLAGS and libvtv_la_LINK if VTV_CYGMIN is set. * libstdc++-v3/src/Makefile.in: Regenerate. * libvtv/Makefile.am : Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN is set. Define libvtv_la_LIBADD, libvtv_la_LDFLAGS, libvtv_stubs_la_LDFLAGS and libvtv_stubs_la_SOURCES if VTV_CYGMIN is set. Add obstac.c to libvtv_la_SOURCES if VTV_CYGMIN is set. * libvtv/Makefile.in : Regenerate. * libvtv/aclocal.m4 : Regenerate. * libvtv/configure : Regenerate. * libvtv/configure.ac : Add ACX_LT_HOST_FLAGS. Define VTV_CYGMIN. * libvtv/configure.tgt : (x86_64-*-cygwin*, i?86-*-cygwin*, x86_64-*-mingw*) (i?86-*-mingw*): Add to supported targets. * libvtv/vtv_fail.cc : Skip inclusion of execinfo.h on Cygwin and MinGW. (log_error_message): Skip calls to backtrace and backtrace_symbols_fd on Cygwin and MinGW. * libvtv/vtv_malloc.cc : Include windows.h and skip sys/mman.h inclusion on Cygwin and MinGW. Add sysconf port on Cygwin and MinGW. (obstack_chunk_alloc): Exchange call to mmap with call to VirtualAlloc on Cygwin and MinGW. (__vtv_malloc_init): Exchange call to sysconf with call to port of sysconf on Cygwin and MinGW. * libvtv/vtv_malloc.h : Declare mprotect and define PROT_READ and PROT_WRITE on Cygwin and MinGW. * libvtv/map.h : Include stdint.h on MinGW. * libvtv/rts.cc : Include windows.h, winternl.h and psapi.h, skip include of execinfo.h, sys/mman.h and link.h on Cygwin and MinGW. Add port of __fortify_fail on Cygwin and MinGW. Change ElfW (Addr) to uintptr_t on Cygwin and MinGW. (read_section_offset_and_length): Add port for Cygwin and MinGW (iterate_modules): New function. (vtv_unprotect_vtable_vars): Use iterate_modules instead of dl_iterate_phdr on Cygwin and MinGW. (vtv_protect_vtable_vars): Likewise. (count_all_pages): Likewise. (dl_iterate_phdr_count_pages): Don't build on Cygwin and MinGW. * libvtv/utils.cc : Include windows.h and skip execinfo.h inclusion on Cygwin and MinGW. (__vtv_open_log): Exchange call to getuid and getpid with GetCurrentProcessId and adjust call to snprintf accordingly on Cygwin and MinGW. Adjust calls to mkdir on MinGW. Adjust call to open on Cygwin and MinGW. (__vtv_add_to_log): Adjust call to snprintf on Cygwin and MinGW. (__vtv_log_verification_failure): Don't generate a backtrace on Cygwin and MinGW. From-SVN: r220232
2015-01-29 09:03:56 +01:00
#if !defined (__CYGWIN__) && !defined (__MINGW32__)
Commit the vtable verification feature. Commit the vtable verification feature. This feature is designed to detect, at run time, if/when the vtable pointer in a C++ object has been corrupted, before allowing virtual calls through that pointer. If pointer corruption is detected, execution of the program is halted. libstdc++-v3 ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * fragment.am: Add XTEMPLATE_FLAGS. * configure.ac: Add definitions for --enable-vtable-verify. * acinclude.m4: Add --enable-vtable-verify and --disable-vtable-verify; define --enable-vtable-verify; define VTV_CXXFLAGS, VTV_PCH_CXXFLAGS and VTV_CXXLINKFLAGS. * config/abi/pre/gnu.ver: Export symbols for vtable verification. * libsupc++/Makefile.am: Define vtv_sources and add it to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES. * libsupc++/vtv_stubs.cc: New file. * include/Makefile.am: Add VTV_PCH_CXXFLAGS to PCHFLAGS. * src/Makefile.am: Add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXLINKFLAGS to CXXLINK. * src/c++98/Makefile.am: Comment out XTEMPLATE_FLAGS; add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXXLINKFLAGS to CXXLINK. * src/C++11/Makefile.am: Ditto. * doc/xml/manual/configure.xml: Add entry for --enable-vtable-verify. * scripts/testsuite_flags.in: Add cxxvtvflags to Usage; cause cxxvtvflags to use VTV_CXXFLAGS and VTV_CXXLINKFLAGS. * testsuite/lib/libstdc++.exp: Add cxxvtvflags; add code to locate libvtv if --enable-vtable-verify was used; set cxxvtvflags; add cxxvtvflags to cxx_final. * testsuite/18_support/bad_exception/23591_thread-1.c: Add -fvtable-verify=none to compiler flags. * testsuite/17_intro/freestanding.cc: Add -fvtable-verify=none to compiler flags. * configure: Regenerated. * Makefile.in: Regenerated. * python/Makefile.in: Regenerated. * include/Makefile.in: Regenerated. * libsupc++/Makefile.in: Regenerated. * config.h.in: Regenerated. * po/Makefile.in: Regenerated. * src/Makefile.in: Regenerated. * src/c++98/Makefile.in: Regenerated. * src/c++11/Makefile.in: Regenerated. * doc/Makefile.in: Regenerated. * testsuite/Makefile.in: Regenerated. top level ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * configure.ac: Add target-libvtv to target_libraries; disable libvtv on non-linux systems; add target-libvtv to noconfigdirs; add libsupc++/.libs to C++ library search paths. * configure: Regenerated. * Makefile.def: Add libvtv to target_modules; make libvtv depend on libstdc++ and libgcc. * Makefile.in: Regenerated. include/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * vtv-change-permission.h: New file. contrib/ChangeLog: 2013-08-06 Caroline Tice4 <cmtice@google.com> * gcc_update: Add libvtv files. libgcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> config.host (extra_parts): Add vtv_start.o, vtv_end.o vtv_start_preinit.o and vtv_end_preinit.o. configure.ac: Add code to check/set enable_vtable_verify. Makefile.in: Add rules to build vtv_*.o, if enable_vtable_verify is true. vtv_start_preinit.c: New file. vtv_end_preinit.c: New file. vtv_start.c: New file. vtv_end.c: New file. configure: Regenerated. gcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * gcc.c (VTABLE_VERIFICATION_SPEC): New definition. (LINK_COMMAND_SPEC): Add VTABLE_VERIFICATION_SPEC. * tree-pass.h: Add pass_vtable_verify. * varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section. (assemble_vtyv_preinit_initializer): New function. (default_sectin_type_flags): Make sure .vtable_map_vars section has LINK_ONCE flag. * output.h: Add function decl for assemble_vtv_preinit_initializer. * vtable-verify.c: New file. * vtable-verify.h: New file. * flag-types.h (enum vtv_priority): Defintions for flag_vtable_verify initialiation levels. * timevar.def (TV_VTABLE_VERIFICATION): New definition. * passes.def: Insert pass_vtable_verify. * aclocal.m4: Reorder includes. * doc/invoke.texi: Add documentation for the flags -fvtable-verify=, -fvtv-debug and -fvtv-counts. * config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Add vtv_start*.o, as appropriate, if -fvtable-verify=... is used. (GNU_USER_TARGET_ENDFILE_SPEC): Add vtv_end*.o as appropriate, if -fvtable-verify=... is used. * Makefile.in (OBJS): Add vtable-verify.o to list. (vtable-verify.o): Add new build rule. (GTFILES): Add vtable-verify.c to list. * common.opt (fvtable-verify=): New flag. (vtv_priority): Values for fvtable-verify= flag. (fvtv-counts): New flag. (fvtv-debug): New flag. * tree.h (save_vtable_map_decl): New extern function decl. gcc/cp/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * Make-lang.in (*CXX_AND_OBJCXX_OBJS): Add vtable-class-hierarchy.o to list. (vtable-class-hierarchy.o): Add build rule. * cp-tree.h (vtv_start_verification_constructor_init_function): New extern function decl. (vtv_finish_verification_constructor_init_function): New extern function decl. (build_vtbl_address): New extern function decl. (get_mangled_vtable_map_var_name): New extern function decl. (vtv_compute_class_hierarchy_transitive_closure): New extern function decl. (vtv_generate_init_routine): New extern function decl. (vtv_save_class_info): New extern function decl. (vtv_recover_class_info): New extern function decl. (vtv_build_vtable_verify_fndecl): New extern function decl. * class.c (finish_struct_1): Add call to vtv_save_class_info if flag_vtable_verify is true. * config-lang.in: Add vtable-class-hierarchy.c to gtfiles list. * vtable-class-hierarchy.c: New file. * mangle.c (get_mangled_vtable_map_var_name): New function. * decl2.c (start_objects): Update function comment. (cp_write_global_declarations): Call vtv_recover_class_info, vtv_compute_class_hierarchy_transitive_closure and vtv_build_vtable_verify_fndecl, before calling finalize_compilation_unit, and call vtv_generate_init_rount after, IFF flag_vtable_verify is true. (vtv_start_verification_constructor_init_function): New function. (vtv_finish_verification_constructor_init_function): New function. * init.c (build_vtbl_address): Remove static qualifier from function. libvtv/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> Initial check-in of new vtable verification feature. * configure.ac : New file. * acinclude.m4 : New file. * Makefile.am : New file. * aclocal.m4 : New file. * configure.tgt : New file. * configure: New file (generated). * Makefile.in: New file (generated). * vtv_set.h : New file. * vtv_utils.cc : New file. * vtv_utils.h : New file. * vtv_malloc.cc : New file. * vtv_rts.cc : New file. * vtv_malloc.h : New file. * vtv_rts.h : New file. * vtv_fail.cc : New file. * vtv_fail.h : New file. * vtv_map.h : New file. * scripts/run-testsuite.sh : New file. * scripts/sum-vtv-counts.c : New file. * testsuite/parts-test-main.h : New file. * testusite/dataentry.cc : New file. * testsuite/temp_deriv.cc : New file. * testsuite/register_pair.cc : New file. * testsuite/virtual_inheritance.cc : New file. * testsuite/field-test.cc : New file. * testsuite/nested_vcall_test.cc : New file. * testsuite/template-list-iostream.cc : New file. * testsuite/register_pair_inserts.cc : New file. * testsuite/register_pair_inserts_mt.cc : New file. * testsuite/event.list : New file. * testsuite/parts-test-extra-parts-views.cc : New file. * testsuite/parts-test-extra-parts-views.h : New file. * testsuite/environment-fail-32.s : New file. * testsuite/parts-test-extra-parts.h : New file. * testsuite/temp_deriv2.cc : New file. * testsuite/dlopen_mt.cc : New file. * testsuite/event.h : New file. * testsuite/template-list.cc : New file. * testsuite/replace-fail.cc : New file. * testsuite/Makefile.am : New file. * testsuite/Makefile.in: New file (generated). * testsuite/mempool_negative.c : New file. * testsuite/parts-test-main.cc : New file. * testsuite/event-private.cc : New file. * testsuite/thunk.cc : New file. * testsuite/event-defintiions.cc : New file. * testsuite/event-private.h : New file. * testsuite/parts-test.list : New file. * testusite/register_pair_mt.cc : New file. * testsuite/povray-derived.cc : New file. * testsuite/event-main.cc : New file. * testsuite/environment.cc : New file. * testsuite/template-list2.cc : New file. * testsuite/thunk_vtable_map_attack.cc : New file. * testsuite/parts-test-extra-parts.cc : New file. * testsuite/environment-fail-64.s : New file. * testsuite/dlopen.cc : New file. * testsuite/so.cc : New file. * testsuite/temp_deriv3.cc : New file. * testsuite/const_vtable.cc : New file. * testsuite/mempool_positive.c : New file. * testsuite/dup_name.cc : New file. From-SVN: r201555
2013-08-07 05:38:59 +02:00
int actual_depth = backtrace (callers, STACK_DEPTH);
backtrace_symbols_fd (callers, actual_depth, vtv_failures_log_fd);
Committing VTV Cygwin patch for Patrick Wollgast * gcc/config/i386/cygwin.h (STARTFILE_SPEC): Add vtv_start.o, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw-w64.h (STARTFILE_SPEC): Likewise. * gcc/config/i386/mingw32.h (STARTFILE_SPEC): Likewise. * gcc/config/i386/cygwin.h (ENDFILE_SPEC): Add vtv_end.o, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw32.h (ENDFILE_SPEC): Likewise. * gcc/config/i386/cygwin.h (LIB_SPEC): Pass -lvtv and -lpsapi, if -fvtable-verify=preinit/std is used. * gcc/config/i386/mingw-w64.h (LIB_SPEC): Likewise. * gcc/config/i386/mingw32.h (LIB_SPEC): Likewise. * gcc/cp/vtable-class-hierarchy.c (vtv_generate_init_routine): Add check for not TARGET_PECOFF at the VTV_PREINIT_PRIORITY checks. * gcc/varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section in case the target is PE or COFF. * libgcc/Makefile.in: Move rules to build vtv_*.o out of the check for CUSTOM_CRTSTUFF. * libgcc/config.host (i[34567]86-*-cygwin*, x86_64-*-cygwin*, i[34567]86-*-mingw*) (x86_64-*-mingw*): Only add vtv_*.o to extra_parts if enable_vtable_verify. * libstdc++-v3/acinclude.m4: Define VTV_CYGMIN. * libstdc++-v3/configure: Regenerate. * libstdc++-v3/libsupc++/Makefile.am: Add vtv_sources only to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES if VTV_CYGMIN is not set. * libstdc++-v3/libsupc++/Makefile.in: Regenerated. * libstdc++-v3/libsupc++/vtv_stubs.cc: Add none weak declaration of every function for Cygwin and MinGW. * libstdc++-v3/src/Makefile.am: Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN is set. Define libvtv_la_SOURCES, libvtv_la_LDFLAGS, libvtv_la_AM_CXXFLAGS and libvtv_la_LINK if VTV_CYGMIN is set. * libstdc++-v3/src/Makefile.in: Regenerate. * libvtv/Makefile.am : Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN is set. Define libvtv_la_LIBADD, libvtv_la_LDFLAGS, libvtv_stubs_la_LDFLAGS and libvtv_stubs_la_SOURCES if VTV_CYGMIN is set. Add obstac.c to libvtv_la_SOURCES if VTV_CYGMIN is set. * libvtv/Makefile.in : Regenerate. * libvtv/aclocal.m4 : Regenerate. * libvtv/configure : Regenerate. * libvtv/configure.ac : Add ACX_LT_HOST_FLAGS. Define VTV_CYGMIN. * libvtv/configure.tgt : (x86_64-*-cygwin*, i?86-*-cygwin*, x86_64-*-mingw*) (i?86-*-mingw*): Add to supported targets. * libvtv/vtv_fail.cc : Skip inclusion of execinfo.h on Cygwin and MinGW. (log_error_message): Skip calls to backtrace and backtrace_symbols_fd on Cygwin and MinGW. * libvtv/vtv_malloc.cc : Include windows.h and skip sys/mman.h inclusion on Cygwin and MinGW. Add sysconf port on Cygwin and MinGW. (obstack_chunk_alloc): Exchange call to mmap with call to VirtualAlloc on Cygwin and MinGW. (__vtv_malloc_init): Exchange call to sysconf with call to port of sysconf on Cygwin and MinGW. * libvtv/vtv_malloc.h : Declare mprotect and define PROT_READ and PROT_WRITE on Cygwin and MinGW. * libvtv/map.h : Include stdint.h on MinGW. * libvtv/rts.cc : Include windows.h, winternl.h and psapi.h, skip include of execinfo.h, sys/mman.h and link.h on Cygwin and MinGW. Add port of __fortify_fail on Cygwin and MinGW. Change ElfW (Addr) to uintptr_t on Cygwin and MinGW. (read_section_offset_and_length): Add port for Cygwin and MinGW (iterate_modules): New function. (vtv_unprotect_vtable_vars): Use iterate_modules instead of dl_iterate_phdr on Cygwin and MinGW. (vtv_protect_vtable_vars): Likewise. (count_all_pages): Likewise. (dl_iterate_phdr_count_pages): Don't build on Cygwin and MinGW. * libvtv/utils.cc : Include windows.h and skip execinfo.h inclusion on Cygwin and MinGW. (__vtv_open_log): Exchange call to getuid and getpid with GetCurrentProcessId and adjust call to snprintf accordingly on Cygwin and MinGW. Adjust calls to mkdir on MinGW. Adjust call to open on Cygwin and MinGW. (__vtv_add_to_log): Adjust call to snprintf on Cygwin and MinGW. (__vtv_log_verification_failure): Don't generate a backtrace on Cygwin and MinGW. From-SVN: r220232
2015-01-29 09:03:56 +01:00
#endif
Commit the vtable verification feature. Commit the vtable verification feature. This feature is designed to detect, at run time, if/when the vtable pointer in a C++ object has been corrupted, before allowing virtual calls through that pointer. If pointer corruption is detected, execution of the program is halted. libstdc++-v3 ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * fragment.am: Add XTEMPLATE_FLAGS. * configure.ac: Add definitions for --enable-vtable-verify. * acinclude.m4: Add --enable-vtable-verify and --disable-vtable-verify; define --enable-vtable-verify; define VTV_CXXFLAGS, VTV_PCH_CXXFLAGS and VTV_CXXLINKFLAGS. * config/abi/pre/gnu.ver: Export symbols for vtable verification. * libsupc++/Makefile.am: Define vtv_sources and add it to libsupc___la_SOURCES and libsupc__convenience_la_SOURCES. * libsupc++/vtv_stubs.cc: New file. * include/Makefile.am: Add VTV_PCH_CXXFLAGS to PCHFLAGS. * src/Makefile.am: Add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXLINKFLAGS to CXXLINK. * src/c++98/Makefile.am: Comment out XTEMPLATE_FLAGS; add VTV_CXXFLAGS to AM_CXXFLAGS; add VTV_CXXXLINKFLAGS to CXXLINK. * src/C++11/Makefile.am: Ditto. * doc/xml/manual/configure.xml: Add entry for --enable-vtable-verify. * scripts/testsuite_flags.in: Add cxxvtvflags to Usage; cause cxxvtvflags to use VTV_CXXFLAGS and VTV_CXXLINKFLAGS. * testsuite/lib/libstdc++.exp: Add cxxvtvflags; add code to locate libvtv if --enable-vtable-verify was used; set cxxvtvflags; add cxxvtvflags to cxx_final. * testsuite/18_support/bad_exception/23591_thread-1.c: Add -fvtable-verify=none to compiler flags. * testsuite/17_intro/freestanding.cc: Add -fvtable-verify=none to compiler flags. * configure: Regenerated. * Makefile.in: Regenerated. * python/Makefile.in: Regenerated. * include/Makefile.in: Regenerated. * libsupc++/Makefile.in: Regenerated. * config.h.in: Regenerated. * po/Makefile.in: Regenerated. * src/Makefile.in: Regenerated. * src/c++98/Makefile.in: Regenerated. * src/c++11/Makefile.in: Regenerated. * doc/Makefile.in: Regenerated. * testsuite/Makefile.in: Regenerated. top level ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * configure.ac: Add target-libvtv to target_libraries; disable libvtv on non-linux systems; add target-libvtv to noconfigdirs; add libsupc++/.libs to C++ library search paths. * configure: Regenerated. * Makefile.def: Add libvtv to target_modules; make libvtv depend on libstdc++ and libgcc. * Makefile.in: Regenerated. include/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * vtv-change-permission.h: New file. contrib/ChangeLog: 2013-08-06 Caroline Tice4 <cmtice@google.com> * gcc_update: Add libvtv files. libgcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> config.host (extra_parts): Add vtv_start.o, vtv_end.o vtv_start_preinit.o and vtv_end_preinit.o. configure.ac: Add code to check/set enable_vtable_verify. Makefile.in: Add rules to build vtv_*.o, if enable_vtable_verify is true. vtv_start_preinit.c: New file. vtv_end_preinit.c: New file. vtv_start.c: New file. vtv_end.c: New file. configure: Regenerated. gcc/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * gcc.c (VTABLE_VERIFICATION_SPEC): New definition. (LINK_COMMAND_SPEC): Add VTABLE_VERIFICATION_SPEC. * tree-pass.h: Add pass_vtable_verify. * varasm.c (assemble_variable): Add code to properly set the comdat section and name for the .vtable_map_vars section. (assemble_vtyv_preinit_initializer): New function. (default_sectin_type_flags): Make sure .vtable_map_vars section has LINK_ONCE flag. * output.h: Add function decl for assemble_vtv_preinit_initializer. * vtable-verify.c: New file. * vtable-verify.h: New file. * flag-types.h (enum vtv_priority): Defintions for flag_vtable_verify initialiation levels. * timevar.def (TV_VTABLE_VERIFICATION): New definition. * passes.def: Insert pass_vtable_verify. * aclocal.m4: Reorder includes. * doc/invoke.texi: Add documentation for the flags -fvtable-verify=, -fvtv-debug and -fvtv-counts. * config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Add vtv_start*.o, as appropriate, if -fvtable-verify=... is used. (GNU_USER_TARGET_ENDFILE_SPEC): Add vtv_end*.o as appropriate, if -fvtable-verify=... is used. * Makefile.in (OBJS): Add vtable-verify.o to list. (vtable-verify.o): Add new build rule. (GTFILES): Add vtable-verify.c to list. * common.opt (fvtable-verify=): New flag. (vtv_priority): Values for fvtable-verify= flag. (fvtv-counts): New flag. (fvtv-debug): New flag. * tree.h (save_vtable_map_decl): New extern function decl. gcc/cp/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> * Make-lang.in (*CXX_AND_OBJCXX_OBJS): Add vtable-class-hierarchy.o to list. (vtable-class-hierarchy.o): Add build rule. * cp-tree.h (vtv_start_verification_constructor_init_function): New extern function decl. (vtv_finish_verification_constructor_init_function): New extern function decl. (build_vtbl_address): New extern function decl. (get_mangled_vtable_map_var_name): New extern function decl. (vtv_compute_class_hierarchy_transitive_closure): New extern function decl. (vtv_generate_init_routine): New extern function decl. (vtv_save_class_info): New extern function decl. (vtv_recover_class_info): New extern function decl. (vtv_build_vtable_verify_fndecl): New extern function decl. * class.c (finish_struct_1): Add call to vtv_save_class_info if flag_vtable_verify is true. * config-lang.in: Add vtable-class-hierarchy.c to gtfiles list. * vtable-class-hierarchy.c: New file. * mangle.c (get_mangled_vtable_map_var_name): New function. * decl2.c (start_objects): Update function comment. (cp_write_global_declarations): Call vtv_recover_class_info, vtv_compute_class_hierarchy_transitive_closure and vtv_build_vtable_verify_fndecl, before calling finalize_compilation_unit, and call vtv_generate_init_rount after, IFF flag_vtable_verify is true. (vtv_start_verification_constructor_init_function): New function. (vtv_finish_verification_constructor_init_function): New function. * init.c (build_vtbl_address): Remove static qualifier from function. libvtv/ChangeLog: 2013-08-06 Caroline Tice <cmtice@google.com> Initial check-in of new vtable verification feature. * configure.ac : New file. * acinclude.m4 : New file. * Makefile.am : New file. * aclocal.m4 : New file. * configure.tgt : New file. * configure: New file (generated). * Makefile.in: New file (generated). * vtv_set.h : New file. * vtv_utils.cc : New file. * vtv_utils.h : New file. * vtv_malloc.cc : New file. * vtv_rts.cc : New file. * vtv_malloc.h : New file. * vtv_rts.h : New file. * vtv_fail.cc : New file. * vtv_fail.h : New file. * vtv_map.h : New file. * scripts/run-testsuite.sh : New file. * scripts/sum-vtv-counts.c : New file. * testsuite/parts-test-main.h : New file. * testusite/dataentry.cc : New file. * testsuite/temp_deriv.cc : New file. * testsuite/register_pair.cc : New file. * testsuite/virtual_inheritance.cc : New file. * testsuite/field-test.cc : New file. * testsuite/nested_vcall_test.cc : New file. * testsuite/template-list-iostream.cc : New file. * testsuite/register_pair_inserts.cc : New file. * testsuite/register_pair_inserts_mt.cc : New file. * testsuite/event.list : New file. * testsuite/parts-test-extra-parts-views.cc : New file. * testsuite/parts-test-extra-parts-views.h : New file. * testsuite/environment-fail-32.s : New file. * testsuite/parts-test-extra-parts.h : New file. * testsuite/temp_deriv2.cc : New file. * testsuite/dlopen_mt.cc : New file. * testsuite/event.h : New file. * testsuite/template-list.cc : New file. * testsuite/replace-fail.cc : New file. * testsuite/Makefile.am : New file. * testsuite/Makefile.in: New file (generated). * testsuite/mempool_negative.c : New file. * testsuite/parts-test-main.cc : New file. * testsuite/event-private.cc : New file. * testsuite/thunk.cc : New file. * testsuite/event-defintiions.cc : New file. * testsuite/event-private.h : New file. * testsuite/parts-test.list : New file. * testusite/register_pair_mt.cc : New file. * testsuite/povray-derived.cc : New file. * testsuite/event-main.cc : New file. * testsuite/environment.cc : New file. * testsuite/template-list2.cc : New file. * testsuite/thunk_vtable_map_attack.cc : New file. * testsuite/parts-test-extra-parts.cc : New file. * testsuite/environment-fail-64.s : New file. * testsuite/dlopen.cc : New file. * testsuite/so.cc : New file. * testsuite/temp_deriv3.cc : New file. * testsuite/const_vtable.cc : New file. * testsuite/mempool_positive.c : New file. * testsuite/dup_name.cc : New file. From-SVN: r201555
2013-08-07 05:38:59 +02:00
}
}
/* In the case where a vtable map variable is the only instance of the
variable we have seen, it points directly to the set of valid
vtable pointers. All subsequent instances of the 'same' vtable map
variable point to the first vtable map variable. This function,
given a vtable map variable PTR, checks a bit to see whether it's
pointing directly to the data set or to the first vtable map
variable. */
static inline bool
is_set_handle_handle (void * ptr)
{
return ((unsigned long) ptr & SET_HANDLE_HANDLE_BIT)
== SET_HANDLE_HANDLE_BIT;
}
/* Returns the actual pointer value of a vtable map variable, PTR (see
comments for is_set_handle_handle for more details). */
static inline vtv_set_handle *
ptr_from_set_handle_handle (void * ptr)
{
return (vtv_set_handle *) ((unsigned long) ptr & ~SET_HANDLE_HANDLE_BIT);
}
/* Given a vtable map variable, PTR, this function sets the bit that
says this is the second (or later) instance of a vtable map
variable. */
static inline vtv_set_handle_handle
set_handle_handle (vtv_set_handle * ptr)
{
return (vtv_set_handle_handle) ((unsigned long) ptr | SET_HANDLE_HANDLE_BIT);
}
/* This function is called from __VLTVerifyVtablePointerDebug; it
sends as much debugging information as it can to the error log
file, then calls __vtv_verify_fail. SET_HANDLE_PTR is the pointer
to the set of valid vtable pointers, VTBL_PTR is the pointer that
was not found in the set, and DEBUG_MSG is the message to be
written to the log file before failing. n */
void
__vtv_verify_fail_debug (void **set_handle_ptr, const void *vtbl_ptr,
const char *debug_msg)
{
log_error_message (debug_msg, false);
/* Call the public interface in case it has been overwritten by
user. */
__vtv_verify_fail (set_handle_ptr, vtbl_ptr);
log_error_message ("Returned from __vtv_verify_fail."
" Secondary verification succeeded.\n", false);
}
/* This function calls __fortify_fail with a FAILURE_MSG and then
calls abort. */
void
__vtv_really_fail (const char *failure_msg)
{
__fortify_fail (failure_msg);
/* We should never get this far; __fortify_fail calls __libc_message
which prints out a back trace and a memory dump and then is
supposed to call abort, but let's play it safe anyway and call abort
ourselves. */
abort ();
}
/* This function takes an error MSG, a vtable map variable
(DATA_SET_PTR) and a vtable pointer (VTBL_PTR). It is called when
an attempt to verify VTBL_PTR with the set pointed to by
DATA_SET_PTR failed. It outputs a failure message with the
addresses involved, and calls __vtv_really_fail. */
static void
vtv_fail (const char *msg, void **data_set_ptr, const void *vtbl_ptr)
{
char buffer[128];
int buf_len;
const char *format_str =
"*** Unable to verify vtable pointer (%p) in set (%p) *** \n";
snprintf (buffer, sizeof (buffer), format_str, vtbl_ptr,
is_set_handle_handle(*data_set_ptr) ?
ptr_from_set_handle_handle (*data_set_ptr) :
*data_set_ptr);
buf_len = strlen (buffer);
/* Send this to to stderr. */
write (2, buffer, buf_len);
if (!vtv_no_abort)
__vtv_really_fail (msg);
}
/* Send information about what we were trying to do when verification
failed to the error log, then call vtv_fail. This function can be
overwritten/replaced by the user, to implement a secondary
verification function instead. DATA_SET_PTR is the vtable map
variable used for the failed verification, and VTBL_PTR is the
vtable pointer that was not found in the set. */
void
__vtv_verify_fail (void **data_set_ptr, const void *vtbl_ptr)
{
char log_msg[256];
snprintf (log_msg, sizeof (log_msg), "Looking for vtable %p in set %p.\n",
vtbl_ptr,
is_set_handle_handle (*data_set_ptr) ?
ptr_from_set_handle_handle (*data_set_ptr) :
*data_set_ptr);
log_error_message (log_msg, false);
const char *format_str =
"*** Unable to verify vtable pointer (%p) in set (%p) *** \n";
snprintf (log_msg, sizeof (log_msg), format_str, vtbl_ptr, *data_set_ptr);
log_error_message (log_msg, false);
log_error_message (" Backtrace: \n", true);
const char *fail_msg = "Potential vtable pointer corruption detected!!\n";
vtv_fail (fail_msg, data_set_ptr, vtbl_ptr);
}