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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
This commit is contained in:
Caroline Tice 2015-01-29 00:03:56 -08:00 committed by Caroline Tice
parent 10881cffc2
commit f7f049fa46
25 changed files with 655 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
gcc/ChangeLog
View File

@ -1,3 +1,21 @@
2015-01-27 Caroline Tice <cmtice@google.com>
Committing VTV Cywin/Ming patch for Patrick Wollgast
* config/i386/cygwin.h (STARTFILE_SPEC): Add vtv_start.o,
if -fvtable-verify=preinit/std is used.
* config/i386/mingw-w64.h (STARTFILE_SPEC): Likewise.
* config/i386/mingw32.h (STARTFILE_SPEC): Likewise.
* config/i386/cygwin.h (ENDFILE_SPEC): Add vtv_end.o,
if -fvtable-verify=preinit/std is used.
* config/i386/mingw32.h (ENDFILE_SPEC): Likewise.
* config/i386/cygwin.h (LIB_SPEC): Pass -lvtv and -lpsapi,
if -fvtable-verify=preinit/std is used.
* config/i386/mingw-w64.h (LIB_SPEC): Likewise.
* config/i386/mingw32.h (LIB_SPEC): Likewise.
* 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.
2015-01-29 Jan Hubicka <hubicka@ucw.cz>
PR ipa/64801

10
gcc/config/i386/cygwin.h
View File

@ -41,12 +41,18 @@ along with GCC; see the file COPYING3. If not see
#define STARTFILE_SPEC "\
%{!shared: %{!mdll: crt0%O%s \
%{pg:gcrt0%O%s}}}\
%{shared:crtbeginS.o%s;:crtbegin.o%s}"
%{shared:crtbeginS.o%s;:crtbegin.o%s} \
%{fvtable-verify=none:%s; \
fvtable-verify=preinit:vtv_start.o%s; \
fvtable-verify=std:vtv_start.o%s}"
#undef ENDFILE_SPEC
#define ENDFILE_SPEC \
"%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}\
%{!shared:%:if-exists(default-manifest.o%s)}\
%{fvtable-verify=none:%s; \
fvtable-verify=preinit:vtv_end.o%s; \
fvtable-verify=std:vtv_end.o%s} \
crtend.o%s"
/* Normally, -lgcc is not needed since everything in it is in the DLL, but we
@ -81,6 +87,8 @@ along with GCC; see the file COPYING3. If not see
%{pthread: } \
-lcygwin \
%{mwindows:-lgdi32 -lcomdlg32} \
%{fvtable-verify=preinit:-lvtv -lpsapi; \
fvtable-verify=std:-lvtv -lpsapi} \
-ladvapi32 -lshell32 -luser32 -lkernel32"
/* To implement C++ function replacement we always wrap the cxx

7
gcc/config/i386/mingw-w64.h
View File

@ -32,7 +32,10 @@ along with GCC; see the file COPYING3. If not see
%{!shared:%{!mdll:%{!municode:crt2%O%s}}} \
%{!shared:%{!mdll:%{municode:crt2u%O%s}}} \
%{pg:gcrt2%O%s} \
crtbegin.o%s"
crtbegin.o%s \
%{fvtable-verify=none:%s; \
fvtable-verify=preinit:vtv_start.o%s; \
fvtable-verify=std:vtv_start.o%s}"
/* Enable multilib. */
@ -43,6 +46,8 @@ along with GCC; see the file COPYING3. If not see
#define LIB_SPEC "%{pg:-lgmon} %{" SPEC_PTHREAD1 ":-lpthread} " \
"%{" SPEC_PTHREAD2 ": } " \
"%{mwindows:-lgdi32 -lcomdlg32} " \
"%{fvtable-verify=preinit:-lvtv -lpsapi; \
fvtable-verify=std:-lvtv -lpsapi} " \
"-ladvapi32 -lshell32 -luser32 -lkernel32"
#undef SPEC_32

10
gcc/config/i386/mingw32.h
View File

@ -91,6 +91,8 @@ along with GCC; see the file COPYING3. If not see
#define LIB_SPEC "%{pg:-lgmon} %{" SPEC_PTHREAD1 ":-lpthread} " \
"%{" SPEC_PTHREAD2 ": } " \
"%{mwindows:-lgdi32 -lcomdlg32} " \
"%{fvtable-verify=preinit:-lvtv -lpsapi; \
fvtable-verify=std:-lvtv -lpsapi} " \
"-ladvapi32 -lshell32 -luser32 -lkernel32"
/* Weak symbols do not get resolved if using a Windows dll import lib.
@ -143,12 +145,18 @@ along with GCC; see the file COPYING3. If not see
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "%{shared|mdll:dllcrt2%O%s} \
%{!shared:%{!mdll:crt2%O%s}} %{pg:gcrt2%O%s} \
crtbegin.o%s"
crtbegin.o%s \
%{fvtable-verify=none:%s; \
fvtable-verify=preinit:vtv_start.o%s; \
fvtable-verify=std:vtv_start.o%s}"
#undef ENDFILE_SPEC
#define ENDFILE_SPEC \
"%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
%{!shared:%:if-exists(default-manifest.o%s)}\
%{fvtable-verify=none:%s; \
fvtable-verify=preinit:vtv_end.o%s; \
fvtable-verify=std:vtv_end.o%s} \
crtend.o%s"
/* Override startfile prefix defaults. */

6
gcc/cp/ChangeLog
View File

@ -1,3 +1,9 @@
2015-01-27 Caroline Tice <cmtice@google.com>
Committing VTV Cywin/Ming patch for Patrick Wollgast
* vtable-class-hierarchy.cc (vtv_generate_init_routine): Add
check for not TARGET_PECOFF at the VTV_PREINIT_PRIORITY checks.
2015-01-27 Jason Merrill <jason@redhat.com>
PR c++/58597

8
gcc/cp/vtable-class-hierarchy.c
View File

@ -1194,7 +1194,11 @@ vtv_generate_init_routine (void)
TREE_STATIC (vtv_fndecl) = 1;
TREE_USED (vtv_fndecl) = 1;
DECL_PRESERVE_P (vtv_fndecl) = 1;
#if defined (TARGET_PECOFF)
if (flag_vtable_verify == VTV_PREINIT_PRIORITY && !TARGET_PECOFF)
#else
if (flag_vtable_verify == VTV_PREINIT_PRIORITY)
#endif
DECL_STATIC_CONSTRUCTOR (vtv_fndecl) = 0;
gimplify_function_tree (vtv_fndecl);
@ -1202,7 +1206,11 @@ vtv_generate_init_routine (void)
symtab->process_new_functions ();
#if defined (TARGET_PECOFF)
if (flag_vtable_verify == VTV_PREINIT_PRIORITY && !TARGET_PECOFF)
#else
if (flag_vtable_verify == VTV_PREINIT_PRIORITY)
#endif
assemble_vtv_preinit_initializer (vtv_fndecl);
}

27
gcc/varasm.c
View File

@ -2252,6 +2252,33 @@ assemble_variable (tree decl, int top_level ATTRIBUTE_UNUSED,
| SECTION_LINKONCE,
DECL_NAME (decl));
in_section = sect;
#elif defined (TARGET_PECOFF)
/* Neither OBJECT_FORMAT_PE, nor OBJECT_FORMAT_COFF is set here.
Therefore the following check is used.
In case a the target is PE or COFF a comdat group section
is created, e.g. .vtable_map_vars$foo. The linker places
everything in .vtable_map_vars at the end.
A fix could be made in
gcc/config/i386/winnt.c: i386_pe_unique_section. */
if (TARGET_PECOFF)
{
char *name;
if (TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE)
name = ACONCAT ((sect->named.name, "$",
IDENTIFIER_POINTER (DECL_NAME (decl)), NULL));
else
name = ACONCAT ((sect->named.name, "$",
IDENTIFIER_POINTER (DECL_COMDAT_GROUP (DECL_NAME (decl))),
NULL));
targetm.asm_out.named_section (name,
sect->named.common.flags
| SECTION_LINKONCE,
DECL_NAME (decl));
in_section = sect;
}
#else
switch_to_section (sect);
#endif

10
libgcc/ChangeLog
View File

@ -1,3 +1,13 @@
2015-01-27 Caroline Tice <cmtice@google.com>
Committing VTV Cywin/Ming patch for Patrick Wollgast
* Makefile.in: Move rules to build vtv_*.o out of the check
for CUSTOM_CRTSTUFF.
* 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.
2015-01-27 Nick Clifton <nickc@redhat.com>
* config/rl78/cmpsi2.S: Use function start and end macros.

2
libgcc/Makefile.in
View File

@ -1003,6 +1003,7 @@ crtoffloadbegin$(objext): $(srcdir)/offloadstuff.c
crtoffloadend$(objext): $(srcdir)/offloadstuff.c
$(crt_compile) $(CRTSTUFF_T_CFLAGS) -c $< -DCRT_END
endif
ifeq ($(enable_vtable_verify),yes)
# These are used in vtable verification; see comments in source files for
@ -1019,7 +1020,6 @@ vtv_start_preinit$(objext): $(srcdir)/vtv_start_preinit.c
vtv_end_preinit$(objext): $(srcdir)/vtv_end_preinit.c
$(crt_compile) $(CRTSTUFF_T_CFLAGS_S) -c $(srcdir)/vtv_end_preinit.c
endif
endif
ifeq ($(CUSTOM_CRTIN),)
# -x assembler-with-cpp is only needed on case-insensitive filesystem.

12
libgcc/config.host
View File

@ -626,6 +626,9 @@ i[4567]86-wrs-vxworks|i[4567]86-wrs-vxworksae)
;;
i[34567]86-*-cygwin*)
extra_parts="crtbegin.o crtbeginS.o crtend.o crtfastmath.o"
if test x$enable_vtable_verify = xyes; then
extra_parts="$extra_parts vtv_start.o vtv_end.o vtv_start_preinit.o vtv_end_preinit.o"
fi
# This has to match the logic for DWARF2_UNWIND_INFO in gcc/config/i386/cygming.h
if test x$enable_sjlj_exceptions = xyes; then
tmake_eh_file="i386/t-sjlj-eh"
@ -642,6 +645,9 @@ i[34567]86-*-cygwin*)
;;
x86_64-*-cygwin*)
extra_parts="crtbegin.o crtbeginS.o crtend.o crtfastmath.o"
if test x$enable_vtable_verify = xyes; then
extra_parts="$extra_parts vtv_start.o vtv_end.o vtv_start_preinit.o vtv_end_preinit.o"
fi
# This has to match the logic for DWARF2_UNWIND_INFO in gcc/config/i386/cygming.h
if test x$enable_sjlj_exceptions = xyes; then
tmake_eh_file="i386/t-sjlj-eh"
@ -659,6 +665,9 @@ x86_64-*-cygwin*)
;;
i[34567]86-*-mingw*)
extra_parts="crtbegin.o crtend.o crtfastmath.o"
if test x$enable_vtable_verify = xyes; then
extra_parts="$extra_parts vtv_start.o vtv_end.o vtv_start_preinit.o vtv_end_preinit.o"
fi
case ${target_thread_file} in
win32)
tmake_file="$tmake_file i386/t-gthr-win32"
@ -705,6 +714,9 @@ x86_64-*-mingw*)
fi
tmake_file="${tmake_file} ${tmake_eh_file} ${tmake_dlldir_file} i386/t-slibgcc-cygming i386/t-cygming i386/t-mingw32 t-dfprules i386/t-crtfm i386/t-chkstk"
extra_parts="$extra_parts crtbegin.o crtend.o crtfastmath.o"
if test x$enable_vtable_verify = xyes; then
extra_parts="$extra_parts vtv_start.o vtv_end.o vtv_start_preinit.o vtv_end_preinit.o"
fi
;;
i[34567]86-*-interix[3-9]*)
tmake_file="$tmake_file i386/t-interix i386/t-chkstk"

15
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,18 @@
2015-01-27 Caroline Tice <cmtice@google.com>
Committing VTV Cywin/Ming patch for Patrick Wollgast
* acinclude.m4: Define VTV_CYGMIN.
* configure: Regenerate.
* libsupc++/Makefile.am: Add vtv_sources only to libsupc___la_SOURCES
and libsupc__convenience_la_SOURCES if VTV_CYGMIN is not set.
* libsupc++/Makefile.in: Regenerated.
* libsupc++/vtv_stubs.cc: Add none weak declaration of every function
for Cygwin and MinGW.
* 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.
2015-01-28 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/64828

12
libstdc++-v3/acinclude.m4
View File

@ -2321,7 +2321,17 @@ AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
AC_MSG_RESULT([$enable_vtable_verify])
if test $enable_vtable_verify = yes; then
VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
case ${target_os} in
cygwin*|mingw32*)
VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
vtv_cygmin="yes"
;;
*)
VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
vtv_cygmin="no"
;;
esac
AM_CONDITIONAL(VTV_CYGMIN, test $vtv_cygmin = yes)
VTV_PCH_CXXFLAGS="-fvtable-verify=std"
VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
else

2
libstdc++-v3/libsupc++/Makefile.am
View File

@ -100,9 +100,11 @@ sources = \
vterminate.cc
if ENABLE_VTABLE_VERIFY
if !VTV_CYGMIN
vtv_sources = \
vtv_stubs.cc
endif
endif
libsupc___la_SOURCES = $(sources) $(c_sources) $(vtv_sources)
libsupc__convenience_la_SOURCES = $(sources) $(c_sources) $(vtv_sources)

34
libstdc++-v3/libsupc++/vtv_stubs.cc
View File

@ -37,6 +37,39 @@
#include <cstddef>
/* weak symbols on Windows work differently than on Linux. To be able
to switch vtv on and off on Windows two dlls are built. One with
the sources from libvtv, the other from these stubs. Depending on
which dll is placed in the folder of the executable the functions
from libvtv or the stubs functions are used. */
#if defined (__CYGWIN__) || defined (__MINGW32__)
extern "C"
void
__VLTChangePermission(int);
void
__VLTRegisterSet(void**, const void*, std::size_t, std::size_t,
void**);
void
__VLTRegisterPair(void**, const void*, std::size_t,
const void*);
const void*
__VLTVerifyVtablePointer(void**, const void*);
void
__VLTRegisterSetDebug(void**, const void*, std::size_t, std::size_t,
void**);
void
__VLTRegisterPairDebug(void**, const void*, std::size_t, const void*,
const char*, const char*);
const void*
__VLTVerifyVtablePointerDebug(void**, const void*, const char*,
const char*);
#else
// Declare as weak for libsupc++, strong definitions are in libvtv.
#if __GXX_WEAK__
extern "C"
@ -66,6 +99,7 @@ const void*
__VLTVerifyVtablePointerDebug(void**, const void*, const char*,
const char*) __attribute__((weak));
#endif
#endif
// Stub definitions.
extern "C"

23
libstdc++-v3/src/Makefile.am
View File

@ -25,7 +25,30 @@ include $(top_srcdir)/fragment.am
SUBDIRS = c++98 c++11
# Cross compiler support.
if VTV_CYGMIN
toolexeclib_LTLIBRARIES = libvtv.la libstdc++.la
else
toolexeclib_LTLIBRARIES = libstdc++.la
endif
if VTV_CYGMIN
vtv_stubs.cc:
rm -f $@
$(LN_S) $(toplevel_srcdir)/libstdc++-v3/libsupc++/vtv_stubs.cc $@
libvtv_la_SOURCES = vtv_stubs.cc
libvtv_la_LDFLAGS = $(lt_host_flags)
libvtv_la_AM_CXXFLAGS = \
$(glibcxx_compiler_pic_flag) \
$(XTEMPLATE_FLAGS) \
-Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end \
$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)
libvtv_la_LINK = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) \
$(LIBTOOLFLAGS) --mode=link $(CXXLD) $(libvtv_la_AM_CXXFLAGS) \
$(CXXFLAGS) $(libvtv_la_LDFLAGS) $(LDFLAGS) -o $@
endif
vpath % $(top_srcdir)/src/c++98
vpath % $(top_srcdir)/src/c++11

47
libvtv/ChangeLog
View File

@ -1,3 +1,50 @@
2015-01-27 Caroline Tice <cmtice@google.com>
Committing VTV Cywin/Ming patch for Patrick Wollgast
* 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.
2014-12-12 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* testsuite/lib/libvtv.exp: Load target-utils.exp

34
libvtv/Makefile.am
View File

@ -38,7 +38,11 @@ AM_CXXFLAGS = $(XCFLAGS)
AM_CXXFLAGS += $(LIBSTDCXX_RAW_CXX_CXXFLAGS)
AM_CXXFLAGS += -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end
toolexeclib_LTLIBRARIES = libvtv.la
if VTV_CYGMIN
toolexeclib_LTLIBRARIES = libvtv.la libvtv_stubs.la
else
toolexeclib_LTLIBRARIES = libvtv.la
endif
vtv_headers = \
vtv_map.h \
@ -55,6 +59,11 @@ vtv_sources = \
vtv_utils.cc \
vtv_end.c
vtv_stubs_sources = \
vtv_start.c \
vtv_stubs.cc \
vtv_end.c
libvtv_includedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)/include
# Link in vtv_start and vtv_end.
@ -67,8 +76,29 @@ vtv_end.c:
rm -f $@
$(LN_S) $(toplevel_srcdir)/libgcc/vtv_end.c $@
if VTV_CYGMIN
obstack.c:
rm -f $@
$(LN_S) $(toplevel_srcdir)/libiberty/obstack.c $@
vtv_stubs.cc:
rm -f $@
$(LN_S) $(toplevel_srcdir)/libstdc++-v3/libsupc++/vtv_stubs.cc $@
endif
if VTV_CYGMIN
libvtv_la_LIBADD = -lpsapi
libvtv_la_LDFLAGS = $(lt_host_flags)
libvtv_stubs_la_LDFLAGS = $(lt_host_flags)
endif
if ENABLE_VTABLE_VERIFY
if VTV_CYGMIN
libvtv_la_SOURCES = $(vtv_sources) obstack.c
libvtv_stubs_la_SOURCES = $(vtv_stubs_sources)
else
libvtv_la_SOURCES = $(vtv_sources)
endif
libvtv_include_HEADERS = $(vtv_headers)
else
libvtv_la_SOURCES =
@ -78,6 +108,8 @@ endif
# Least ordering for dependencies mean linking w/o libstdc++ for as
# long as the development of libvtv does not absolutely require it.
CXXVTV=$(CC_FOR_TARGET)
CXXLD=$(CC_FOR_TARGET)
LTCXXCOMPILE = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
--mode=compile $(CXXVTV) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS)

12
libvtv/configure.ac
View File

@ -122,6 +122,7 @@ AC_CHECK_TOOL(RANLIB, ranlib, :)
# Configure libtool
AC_LIBTOOL_DLOPEN
AM_PROG_LIBTOOL
ACX_LT_HOST_FLAGS
AC_SUBST(enable_shared)
AC_SUBST(enable_static)
@ -155,4 +156,15 @@ _EOF
])
fi
case "$target_os" in
cygwin*|mingw32*)
vtv_cygmin="yes"
;;
*)
vtv_cygmin="no"
;;
esac
AM_CONDITIONAL(VTV_CYGMIN, test $vtv_cygmin = yes)
AC_OUTPUT

6
libvtv/configure.tgt
View File

@ -26,6 +26,12 @@ case "${target}" in
x86_64-*-linux* | i?86-*-linux*)
VTV_SUPPORTED=yes
;;
x86_64-*-cygwin* | i?86-*-cygwin*)
VTV_SUPPORTED=yes
;;
x86_64-*-mingw* | i?86-*-mingw*)
VTV_SUPPORTED=yes
;;
powerpc*-*-linux*)
;;
sparc*-*-linux*)

6
libvtv/vtv_fail.cc
View File

@ -46,7 +46,11 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#if !defined (__CYGWIN__) && !defined (__MINGW32__)
#include <execinfo.h>
#endif
#include <unistd.h>
#include "vtv_utils.h"
@ -102,8 +106,10 @@ log_error_message (const char *log_msg, bool generate_backtrace)
{
#define STACK_DEPTH 20
void *callers[STACK_DEPTH];
#if !defined (__CYGWIN__) && !defined (__MINGW32__)
int actual_depth = backtrace (callers, STACK_DEPTH);
backtrace_symbols_fd (callers, actual_depth, vtv_failures_log_fd);
#endif
}
}

25
libvtv/vtv_malloc.cc
View File

@ -33,7 +33,11 @@
#include <stdlib.h>
#include <unistd.h>
#if defined (__CYGWIN__) || defined (__MINGW32__)
#include <windows.h>
#else
#include <sys/mman.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
@ -62,6 +66,18 @@ static void *current_chunk VTV_PROTECTED_VAR = 0;
static size_t current_chunk_size VTV_PROTECTED_VAR = 0;
static int malloc_initialized VTV_PROTECTED_VAR = 0;
#if defined (__CYGWIN__) || defined (__MINGW32__)
//sysconf(_SC_PAGE_SIZE) port
long sysconf_SC_PAGE_SIZE()
{
SYSTEM_INFO si;
GetSystemInfo(&si);
long pageSize = (long)si.dwPageSize;
return pageSize;
//return 4096; // standard usermode 32bit pagesize in bytes // FIXME
}
#endif
/* The function goes through and counts all the pages we have allocated
so far. It returns the page count. */
@ -162,8 +178,13 @@ obstack_chunk_alloc (size_t size)
VTV_DEBUG_ASSERT ((size & (VTV_PAGE_SIZE - 1)) == 0);
void *allocated;
#if defined (__CYGWIN__) || defined (__MINGW32__)
if ((allocated = VirtualAlloc(NULL, size, MEM_RESERVE|MEM_COMMIT,
PAGE_READWRITE)) == 0)
#else
if ((allocated = mmap (NULL, size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)) == 0)
#endif
VTV_error ();
VTV_DEBUG_ASSERT (((unsigned long) allocated & (VTV_PAGE_SIZE - 1)) == 0);
@ -190,7 +211,11 @@ __vtv_malloc_init (void)
if (malloc_initialized)
return;
#if defined (__CYGWIN__) || defined (__MINGW32__)
if (VTV_PAGE_SIZE != sysconf_SC_PAGE_SIZE())
#else
if (VTV_PAGE_SIZE != sysconf (_SC_PAGE_SIZE))
#endif
VTV_error ();
obstack_chunk_size (&vtv_obstack) = VTV_PAGE_SIZE;

7
libvtv/vtv_malloc.h
View File

@ -95,4 +95,11 @@ extern void __vtv_malloc_stats (void);
extern void __vtv_malloc_dump_stats (void);
extern int __vtv_count_mmapped_pages (void);
#if defined (__CYGWIN__) || defined (__MINGW32__)
extern "C" int mprotect (void *addr, int len, int prot);
#define PROT_READ 0x1
#define PROT_WRITE 0x2
#endif
#endif /* vtv_malloc.h */

6
libvtv/vtv_map.h
View File

@ -26,7 +26,13 @@
#define _VTV_MAP_H 1
#include <string.h>
#ifdef __MINGW32__
#include <stdint.h>
#include "vtv_utils.h"
#else
#include <vtv_utils.h>
#endif
inline uint64_t
load8bytes (const void *p)

295
libvtv/vtv_rts.cc
View File

@ -121,12 +121,20 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#if defined (__CYGWIN__) || defined (__MINGW32__)
#include <windows.h>
#include <winternl.h>
#include <psapi.h>
#else
#include <execinfo.h>
#endif
#include <unistd.h>
#if !defined (__CYGWIN__) && !defined (__MINGW32__)
#include <sys/mman.h>
#include <errno.h>
#include <link.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
@ -143,6 +151,13 @@
#include "vtv-change-permission.h"
#if defined (__CYGWIN__) || defined (__MINGW32__)
// porting: fix link error to libc
void __fortify_fail (const char * msg){
OutputDebugString(msg);
abort();
}
#else
extern "C" {
/* __fortify_fail is a function in glibc that calls __libc_message,
@ -159,6 +174,7 @@ extern "C" {
extern void __fortify_fail (const char *) __attribute__((noreturn));
} /* extern "C" */
#endif
/* The following variables are used only for debugging and performance
tuning purposes. Therefore they do not need to be "protected".
@ -313,10 +329,17 @@ typedef vtv_set_handle * vtv_set_handle_handle;
struct sect_hdr_data
{
#if defined (__CYGWIN__) || defined (__MINGW32__)
uintptr_t dlpi_addr; /* The header address in the INFO record,
passed in from dl_iterate_phdr. */
uintptr_t mp_low; /* Start address of the .vtable_map_vars
section in memory. */
#else
ElfW (Addr) dlpi_addr; /* The header address in the INFO record,
passed in from dl_iterate_phdr. */
ElfW (Addr) mp_low; /* Start address of the .vtable_map_vars
section in memory. */
#endif
size_t mp_size; /* Size of the .vtable_map_vars section in
memory. */
};
@ -336,8 +359,13 @@ unsigned int num_cache_entries VTV_PROTECTED_VAR = 0;
it returns the record for that entry; otherwise it returns
NULL. */
#if defined (__CYGWIN__) || defined (__MINGW32__)
struct sect_hdr_data *
search_cached_file_data (uintptr_t load_addr)
#else
struct sect_hdr_data *
search_cached_file_data (ElfW (Addr) load_addr)
#endif
{
unsigned int i;
for (i = 0; i < num_cache_entries; ++i)
@ -401,6 +429,130 @@ log_memory_protection_data (char *message)
__vtv_add_to_log (log_fd, "%s", message);
}
#if defined (__CYGWIN__) || defined (__MINGW32__)
static void
read_section_offset_and_length (char *name,
uintptr_t addr,
const char *sect_name,
int mprotect_flags,
off_t *sect_offset,
WORD *sect_len)
{
bool found = false;
struct sect_hdr_data *cached_data = NULL;
/* Check to see if we already have the data for this file. */
cached_data = search_cached_file_data (addr);
if (cached_data)
{
*sect_offset = cached_data->mp_low;
*sect_len = cached_data->mp_size;
return;
}
// check for DOS Header magic bytes
if (*(WORD *)addr == 0x5A4D)
{
int name_len = strlen (sect_name);
int fd = -1;
/* Attempt to open the binary file on disk. */
if (strlen (name) == 0)
{
return;
}
else
fd = open (name, O_RDONLY | O_BINARY);
if (fd != -1)
{
/* Find the section header information in memory. */
PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)addr;
PIMAGE_NT_HEADERS pNtHeaders = (PIMAGE_NT_HEADERS)((char *)addr
+ pDosHeader->e_lfanew);
PIMAGE_FILE_HEADER pFileHeader = &pNtHeaders->FileHeader;
DWORD PointerToStringTable = pFileHeader->PointerToSymbolTable
+ (pFileHeader->NumberOfSymbols*0x12);
PIMAGE_SECTION_HEADER sect_hdr =
(PIMAGE_SECTION_HEADER)((char *)&pNtHeaders->OptionalHeader
+ pFileHeader->SizeOfOptionalHeader);
/* Loop through all the section headers, looking for one whose
name is ".vtable_map_vars". */
for (int i = 0; i < pFileHeader->NumberOfSections && !found; ++i)
{
char header_name[64];
/* Check if we have to get the section name from the COFF string
table. */
if (sect_hdr[i].Name[0] == '/')
{
if (atoi((const char*)sect_hdr[i].Name+1) == 0)
{
continue;
}
off_t name_offset = PointerToStringTable
+ atoi((const char*)sect_hdr[i].Name+1);
size_t bytes_read = ReadFromOffset (fd, &header_name, 64,
name_offset);
VTV_ASSERT (bytes_read > 0);
}
else
{
memcpy (&header_name, sect_hdr[i].Name,
sizeof (sect_hdr[i].Name));
}
if (memcmp (header_name, sect_name, name_len) == 0)
{
/* We found the section; get its load offset and
size. */
*sect_offset = sect_hdr[i].VirtualAddress;
if (sect_hdr[i].Misc.VirtualSize % VTV_PAGE_SIZE != 0)
*sect_len = sect_hdr[i].Misc.VirtualSize + VTV_PAGE_SIZE
- (sect_hdr[i].Misc.VirtualSize % VTV_PAGE_SIZE);
else
*sect_len = sect_hdr[i].Misc.VirtualSize;
found = true;
}
}
close (fd);
}
}
if (*sect_offset != 0 && *sect_len != 0)
{
/* Calculate the page location in memory, making sure the
address is page-aligned. */
uintptr_t start_addr = addr + *sect_offset;
*sect_offset = start_addr & ~(VTV_PAGE_SIZE - 1);
*sect_len = *sect_len - 1;
/* Since we got this far, we must not have found these pages in
the cache, so add them to it. NOTE: We could get here either
while making everything read-only or while making everything
read-write. We will only update the cache if we get here on
a read-write (to make absolutely sure the cache is writable
-- also the read-write pass should come before the read-only
pass). */
if ((mprotect_flags & PROT_WRITE)
&& num_cache_entries < MAX_ENTRIES)
{
vtv_sect_info_cache[num_cache_entries].dlpi_addr = addr;
vtv_sect_info_cache[num_cache_entries].mp_low = *sect_offset;
vtv_sect_info_cache[num_cache_entries].mp_size = *sect_len;
num_cache_entries++;
}
}
}
#else
static void
read_section_offset_and_length (struct dl_phdr_info *info,
const char *sect_name,
@ -547,7 +699,125 @@ read_section_offset_and_length (struct dl_phdr_info *info,
}
}
}
#endif
#if defined (__CYGWIN__) || defined (__MINGW32__)
/* This function is used to iterate over all loaded modules and searches
for a section called ".vtable_map_vars". The only interaction with
the binary file on disk of the module is to read section names in the
COFF string table. If the module contains a ".vtable_map_vars" section,
read section offset and size from the section header of the loaded module.
Call 'mprotect' on those pages, setting the protection either to
read-only or read-write, depending on what's in data.
The calls to change the protection occur in vtv_unprotect_vtable_vars
and vtv_protect_vtable_vars. */
static int
iterate_modules (void *data)
{
int * mprotect_flags = (int *) data;
off_t map_sect_offset = 0;
WORD map_sect_len = 0;
char buffer[1024];
const char *map_sect_name = VTV_PROTECTED_VARS_SECTION;
HMODULE hMods[1024];
HANDLE hProcess;
DWORD cbNeeded;
hProcess = GetCurrentProcess ();
if (NULL == hProcess)
return 0;
if (EnumProcessModules (hProcess, hMods, sizeof (hMods), &cbNeeded))
{
/* Iterate over all loaded modules. */
for (unsigned int i = 0; i < (cbNeeded / sizeof (HMODULE)); i++)
{
char szModName[MAX_PATH];
if (GetModuleFileNameExA (hProcess, hMods[i], szModName,
sizeof (szModName)))
{
map_sect_offset = 0;
map_sect_len = 0;
read_section_offset_and_length (szModName,
(uintptr_t) hMods[i],
map_sect_name,
*mprotect_flags,
&map_sect_offset,
&map_sect_len);
if (debug_functions)
{
snprintf (buffer, sizeof(buffer),
" Looking at load module %s to change permissions to %s\n",
szModName,
(*mprotect_flags & PROT_WRITE) ? "READ/WRITE" : "READ-ONLY");
log_memory_protection_data (buffer);
}
/* See if we actually found the section. */
if (map_sect_offset && map_sect_len)
{
unsigned long long start;
int result;
if (debug_functions)
{
snprintf (buffer, sizeof (buffer),
" (%s): Protecting %p to %p\n",
szModName,
(void *) map_sect_offset,
(void *) (map_sect_offset + map_sect_len));
log_memory_protection_data (buffer);
}
/* Change the protections on the pages for the section. */
start = get_cycle_count ();
result = mprotect ((void *) map_sect_offset, map_sect_len,
*mprotect_flags);
accumulate_cycle_count (&mprotect_cycles, start);
if (result == -1)
{
if (debug_functions)
{
snprintf (buffer, sizeof (buffer),
"Failed called to mprotect for %s error: ",
(*mprotect_flags & PROT_WRITE) ?
"READ/WRITE" : "READ-ONLY");
log_memory_protection_data (buffer);
perror(NULL);
}
VTV_error();
}
else
{
if (debug_functions)
{
snprintf (buffer, sizeof (buffer),
"mprotect'ed range [%p, %p]\n",
(void *) map_sect_offset,
(char *) map_sect_offset + map_sect_len);
log_memory_protection_data (buffer);
}
}
increment_num_calls (&num_calls_to_mprotect);
/* num_pages_protected += (map_sect_len + VTV_PAGE_SIZE - 1)
/ VTV_PAGE_SIZE; */
num_pages_protected += (map_sect_len + 4096 - 1) / 4096;
continue;
}
}
}
}
CloseHandle(hProcess);
return 0;
}
#else
/* This is the callback function used by dl_iterate_phdr (which is
called from vtv_unprotect_vtable_vars and vtv_protect_vtable_vars).
It attempts to find the binary file on disk for the INFO record
@ -652,6 +922,7 @@ dl_iterate_phdr_callback (struct dl_phdr_info *info, size_t, void *data)
return 0;
}
#endif
/* This function explicitly changes the protection (read-only or read-write)
on the vtv_sect_info_cache, which is used for speeding up look ups in the
@ -678,7 +949,7 @@ change_protections_on_phdr_cache (int protection_flag)
char * low_address = (char *) &(vtv_sect_info_cache);
size_t cache_size = MAX_ENTRIES * sizeof (struct sect_hdr_data);
low_address = (char *) ((unsigned long) low_address & ~(VTV_PAGE_SIZE - 1));
low_address = (char *) ((uintptr_t) low_address & ~(VTV_PAGE_SIZE - 1));
if (mprotect ((void *) low_address, cache_size, protection_flag) == -1)
VTV_error ();
@ -695,7 +966,11 @@ vtv_unprotect_vtable_vars (void)
mprotect_flags = PROT_READ | PROT_WRITE;
change_protections_on_phdr_cache (mprotect_flags);
#if defined (__CYGWIN__) || defined (__MINGW32__)
iterate_modules ((void *) &mprotect_flags);
#else
dl_iterate_phdr (dl_iterate_phdr_callback, (void *) &mprotect_flags);
#endif
}
/* Protect all the vtable map vars and other side data that is used
@ -708,7 +983,11 @@ vtv_protect_vtable_vars (void)
int mprotect_flags;
mprotect_flags = PROT_READ;
#if defined (__CYGWIN__) || defined (__MINGW32__)
iterate_modules ((void *) &mprotect_flags);
#else
dl_iterate_phdr (dl_iterate_phdr_callback, (void *) &mprotect_flags);
#endif
change_protections_on_phdr_cache (mprotect_flags);
}
@ -868,7 +1147,7 @@ const unsigned long SET_HANDLE_HANDLE_BIT = 0x2;
static inline bool
is_set_handle_handle (void * ptr)
{
return ((unsigned long) ptr & SET_HANDLE_HANDLE_BIT)
return ((uintptr_t) ptr & SET_HANDLE_HANDLE_BIT)
== SET_HANDLE_HANDLE_BIT;
}
@ -878,7 +1157,7 @@ is_set_handle_handle (void * ptr)
static inline vtv_set_handle *
ptr_from_set_handle_handle (void * ptr)
{
return (vtv_set_handle *) ((unsigned long) ptr & ~SET_HANDLE_HANDLE_BIT);
return (vtv_set_handle *) ((uintptr_t) ptr & ~SET_HANDLE_HANDLE_BIT);
}
/* Given a vtable map variable, PTR, this function sets the bit that
@ -888,7 +1167,7 @@ ptr_from_set_handle_handle (void * ptr)
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);
return (vtv_set_handle_handle) ((uintptr_t) ptr | SET_HANDLE_HANDLE_BIT);
}
static inline void
@ -1362,6 +1641,7 @@ __VLTVerifyVtablePointer (void ** set_handle_ptr, const void * vtable_ptr)
static int page_count_2 = 0;
#if !defined (__CYGWIN__) && !defined (__MINGW32__)
static int
dl_iterate_phdr_count_pages (struct dl_phdr_info *info,
size_t unused __attribute__ ((__unused__)),
@ -1392,6 +1672,7 @@ dl_iterate_phdr_count_pages (struct dl_phdr_info *info,
return 0;
}
#endif
static void
count_all_pages (void)
@ -1401,7 +1682,11 @@ count_all_pages (void)
mprotect_flags = PROT_READ;
page_count_2 = 0;
#if defined (__CYGWIN__) || defined (__MINGW32__)
iterate_modules ((void *) &mprotect_flags);
#else
dl_iterate_phdr (dl_iterate_phdr_count_pages, (void *) &mprotect_flags);
#endif
page_count_2 += __vtv_count_mmapped_pages ();
}

34
libvtv/vtv_utils.cc
View File

@ -33,7 +33,12 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined (__CYGWIN__) || defined (__MINGW32__)
#include <windows.h>
#else
#include <execinfo.h>
#endif
#include <unistd.h>
#include <errno.h>
@ -64,8 +69,12 @@ __vtv_open_log (const char *name)
{
char log_name[1024];
char log_dir[512];
#if defined (__CYGWIN__) || defined (__MINGW32__)
pid_t process_id = GetCurrentProcessId ();
#else
uid_t user_id = getuid ();
pid_t process_id = getpid ();
#endif
char *logs_prefix;
bool logs_dir_specified = false;
int fd = -1;
@ -74,14 +83,29 @@ __vtv_open_log (const char *name)
if (logs_prefix && strlen (logs_prefix) > 0)
{
logs_dir_specified = true;
#ifdef __MINGW32__
mkdir (logs_prefix);
#else
mkdir (logs_prefix, S_IRWXU);
snprintf (log_dir, sizeof (log_dir), "%s/vtv_logs", logs_prefix);
mkdir (log_dir, S_IRWXU);
#endif
snprintf (log_dir, sizeof (log_dir), "%s/vtv_logs", logs_prefix);
#ifdef __MINGW32__
mkdir (log_dir);
#else
mkdir (log_dir, S_IRWXU);
#endif
#if defined (__CYGWIN__) || defined (__MINGW32__)
snprintf (log_name, sizeof (log_name), "%s_%d_%s", log_dir,
(unsigned) process_id, name);
fd = open (log_name, O_WRONLY | O_APPEND | O_CREAT, S_IRWXU);
#else
snprintf (log_name, sizeof (log_name), "%s/%d_%d_%s", log_dir,
(unsigned) user_id, (unsigned) process_id, name);
fd = open (log_name, O_WRONLY | O_APPEND | O_CREAT | O_NOFOLLOW,
S_IRWXU);
#endif
}
else
fd = dup (2);
@ -125,8 +149,12 @@ __vtv_add_to_log (int log_file, const char * format, ...)
va_list ap;
va_start (ap, format);
#if defined (__CYGWIN__) || defined (__MINGW32__)
snprintf (output, sizeof (output), "VTV: PID=%ld ", GetCurrentProcessId ());
#else
snprintf (output, sizeof (output), "VTV: PID=%d PPID=%d ", getpid (),
getppid ());
#endif
vtv_log_write (log_file, output);
vsnprintf (output, sizeof (output), format, ap);
vtv_log_write (log_file, output);
@ -151,6 +179,7 @@ __vtv_log_verification_failure (const char *log_msg, bool generate_backtrace)
__vtv_add_to_log (vtv_failures_log_fd, "%s", log_msg);
#if !defined (__CYGWIN__) && !defined (__MINGW32__)
if (generate_backtrace)
{
#define STACK_DEPTH 20
@ -158,4 +187,5 @@ __vtv_log_verification_failure (const char *log_msg, bool generate_backtrace)
int actual_depth = backtrace (callers, STACK_DEPTH);
backtrace_symbols_fd (callers, actual_depth, vtv_failures_log_fd);
}
#endif
}