[PATCH 3/3] [LLVM] [sanitizer] add conditionals for libc
Bernhard Reutner-Fischer
rep.dot.nop at gmail.com
Thu Apr 17 07:27:58 PDT 2014
On 17 April 2014 16:07, Konstantin Serebryany
<konstantin.s.serebryany at gmail.com> wrote:
> Hi,
>
> If you are trying to modify the libsanitizer files, please read here:
> https://code.google.com/p/address-sanitizer/wiki/HowToContribute
I read that, thanks. Patch 3/3 is for current compiler-rt git repo,
please install it there, i do not have write access to the LLVM nor
compiler-rt trees.
TIA,
>
> --kcc
>
> On Thu, Apr 17, 2014 at 5:49 PM, Bernhard Reutner-Fischer
> <rep.dot.nop at gmail.com> wrote:
>> Conditionalize usage of dlvsym(), nanosleep(), usleep();
>> Conditionalize layout of struct sigaction and type of it's member
>> sa_flags.
>> Conditionalize glob_t members gl_closedir, gl_readdir, gl_opendir,
>> gl_flags, gl_lstat, gl_stat.
>> Check for availability of glob.h for use with above members.
>> Check for availability of netrom/netrom.h, sys/ustat.h (for obsolete
>> ustat() function), utime.h (for obsolete utime() function), wordexp.h.
>> Determine size of sigset_t instead of hardcoding it.
>> Determine size of struct statfs64, if available.
>>
>> Leave defaults to match what glibc expects but probe them for uClibc.
>>
>> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop at gmail.com>
>> ---
>> CMakeLists.txt | 58 +++++++
>> cmake/Modules/CompilerRTUtils.cmake | 15 ++
>> cmake/Modules/FunctionExistsNotStub.cmake | 56 +++++++
>> lib/interception/interception_linux.cc | 2 +
>> lib/interception/interception_linux.h | 9 ++
>> .../sanitizer_common_interceptors.inc | 101 +++++++++++-
>> .../sanitizer_platform_limits_posix.cc | 44 ++++-
>> .../sanitizer_platform_limits_posix.h | 27 +++-
>> lib/sanitizer_common/sanitizer_posix_libcdep.cc | 9 ++
>> make/platform/clang_linux.mk | 180 +++++++++++++++++++++
>> make/platform/clang_linux_test_libc.c | 68 ++++++++
>> 11 files changed, 561 insertions(+), 8 deletions(-)
>> create mode 100644 cmake/Modules/FunctionExistsNotStub.cmake
>> create mode 100644 make/platform/clang_linux_test_libc.c
>>
>> diff --git a/CMakeLists.txt b/CMakeLists.txt
>> index e1a7a1f..af8073e 100644
>> --- a/CMakeLists.txt
>> +++ b/CMakeLists.txt
>> @@ -330,6 +330,64 @@ if(APPLE)
>> -isysroot ${IOSSIM_SDK_DIR})
>> endif()
>>
>> +set(ct_c ${COMPILER_RT_SOURCE_DIR}/make/platform/clang_linux_test_libc.c)
>> +check_include_file(sys/ustat.h HAVE_SYS_USTAT_H)
>> +check_include_file(utime.h HAVE_UTIME_H)
>> +check_include_file(wordexp.h HAVE_WORDEXP_H)
>> +check_include_file(glob.h HAVE_GLOB_H)
>> +include(FunctionExistsNotStub)
>> +check_function_exists_not_stub(${ct_c} nanosleep HAVE_NANOSLEEP)
>> +check_function_exists_not_stub(${ct_c} usleep HAVE_USLEEP)
>> +include(CheckTypeSize)
>> +# check for sizeof sigset_t
>> +set(oCMAKE_EXTRA_INCLUDE_FILES "${CMAKE_EXTRA_INCLUDE_FILES}")
>> +set(CMAKE_EXTRA_INCLUDE_FILES ${CMAKE_EXTRA_INCLUDE_FILES} signal.h)
>> +check_type_size("sigset_t" SIZEOF_SIGSET_T BUILTIN_TYPES_ONLY)
>> +if(EXISTS HAVE_SIZEOF_SIGSET_T)
>> + set(SIZEOF_SIGSET_T ${HAVE_SIZEOF_SIGSET_T})
>> +endif()
>> +set(CMAKE_EXTRA_INCLUDE_FILES "${oCMAKE_EXTRA_INCLUDE_FILES}")
>> +# check for sizeof struct statfs64
>> +set(oCMAKE_EXTRA_INCLUDE_FILES "${CMAKE_EXTRA_INCLUDE_FILES}")
>> +check_include_file(sys/statfs.h HAVE_SYS_STATFS_H)
>> +check_include_file(sys/vfs.h HAVE_SYS_VFS_H)
>> +if(HAVE_SYS_STATFS_H)
>> + set(CMAKE_EXTRA_INCLUDE_FILES ${CMAKE_EXTRA_INCLUDE_FILES} sys/statfs.h)
>> +endif()
>> +if(HAVE_SYS_VFS_H)
>> + set(CMAKE_EXTRA_INCLUDE_FILES ${CMAKE_EXTRA_INCLUDE_FILES} sys/vfs.h)
>> +endif()
>> +# Have to pass _LARGEFILE64_SOURCE otherwise there is no struct statfs64.
>> +# We forcefully enable LFS to retain glibc legacy behaviour herein.
>> +set(oCMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS})
>> +set(CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} -D_LARGEFILE64_SOURCE)
>> +check_type_size("struct statfs64" SIZEOF_STRUCT_STATFS64)
>> +if(EXISTS HAVE_SIZEOF_STRUCT_STATFS64)
>> + set(SIZEOF_STRUCT_STATFS64 ${HAVE_SIZEOF_STRUCT_STATFS64})
>> +else()
>> + set(CMAKE_REQUIRED_DEFINITIONS ${oCMAKE_REQUIRED_DEFINITIONS})
>> +endif()
>> +set(CMAKE_EXTRA_INCLUDE_FILES "${oCMAKE_EXTRA_INCLUDE_FILES}")
>> +# do not set(CMAKE_REQUIRED_DEFINITIONS ${oCMAKE_REQUIRED_DEFINITIONS})
>> +# it back here either way.
>> +include(CheckStructHasMember)
>> +check_struct_has_member(glob_t gl_flags glob.h HAVE_GLOB_T_GL_FLAGS)
>> +check_struct_has_member(glob_t gl_closedir glob.h HAVE_GLOB_T_GL_CLOSEDIR)
>> +check_struct_has_member(glob_t gl_readdir glob.h HAVE_GLOB_T_GL_READDIR)
>> +check_struct_has_member(glob_t gl_opendir glob.h HAVE_GLOB_T_GL_OPENDIR)
>> +check_struct_has_member(glob_t gl_lstat glob.h HAVE_GLOB_T_GL_LSTAT)
>> +check_struct_has_member(glob_t gl_stat glob.h HAVE_GLOB_T_GL_STAT)
>> +
>> +# folks seem to have an aversion to configure_file? So be it..
>> +foreach(x HAVE_SYS_USTAT_H HAVE_UTIME_H HAVE_WORDEXP_H HAVE_GLOB_H
>> +HAVE_NANOSLEEP HAVE_USLEEP SIZEOF_SIGSET_T SIZEOF_STRUCT_STATFS64
>> +HAVE_GLOB_T_GL_FLAGS HAVE_GLOB_T_GL_CLOSEDIR
>> +HAVE_GLOB_T_GL_READDIR HAVE_GLOB_T_GL_OPENDIR
>> +HAVE_GLOB_T_GL_LSTAT HAVE_GLOB_T_GL_STAT)
>> +def_undef_string(${x} SANITIZER_COMMON_CFLAGS)
>> +endforeach()
>> +
>> +
>> # Architectures supported by Sanitizer runtimes. Specific sanitizers may
>> # support only subset of these (e.g. TSan works on x86_64 only).
>> filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
>> diff --git a/cmake/Modules/CompilerRTUtils.cmake b/cmake/Modules/CompilerRTUtils.cmake
>> index e22e775..3a0beec 100644
>> --- a/cmake/Modules/CompilerRTUtils.cmake
>> +++ b/cmake/Modules/CompilerRTUtils.cmake
>> @@ -59,3 +59,18 @@ macro(append_no_rtti_flag list)
>> append_if(COMPILER_RT_HAS_FNO_RTTI_FLAG -fno-rtti ${list})
>> append_if(COMPILER_RT_HAS_GR_FLAG /GR- ${list})
>> endmacro()
>> +
>> +# Appends -Dvalue=${value}/-Uvalue to all strings in ARGN
>> +macro(def_undef_string condition)
>> + if("${${condition}}" STREQUAL "")
>> + foreach(str ${ARGN})
>> + set(${str} "${${str}} -U${condition}")
>> + endforeach()
>> + else()
>> + foreach(str ${ARGN})
>> + set(${str} "${${str}} '-D${condition}=${${condition}}'")
>> + endforeach()
>> + endif()
>> +endmacro()
>> +
>> +
>> diff --git a/cmake/Modules/FunctionExistsNotStub.cmake b/cmake/Modules/FunctionExistsNotStub.cmake
>> new file mode 100644
>> index 0000000..9f944dd
>> --- /dev/null
>> +++ b/cmake/Modules/FunctionExistsNotStub.cmake
>> @@ -0,0 +1,56 @@
>> +INCLUDE(CheckFunctionExists)
>> +
>> +# The following variables may be set before calling this macro to
>> +# modify the way the check is run:
>> +#
>> +# CMAKE_REQUIRED_FLAGS = string of compile command line flags
>> +# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
>> +# CMAKE_REQUIRED_INCLUDES = list of include directories
>> +
>> +macro(CHECK_FUNCTION_EXISTS_NOT_STUB CSRC FUNCTION VARIABLE)
>> + if(NOT DEFINED CHECKED_STUB_${VARIABLE})
>> + set(CHECKED_STUB_${VARIABLE} "done" CACHE INTERNAL "checked stub of ${FUNCTION}")
>> + CHECK_FUNCTION_EXISTS("${FUNCTION}" "${VARIABLE}")
>> + if(DEFINED ${VARIABLE})
>> + if(NOT CMAKE_REQUIRED_QUIET)
>> + message(STATUS "Looking for stubbed out ${FUNCTION}")
>> + endif()
>> + if(CMAKE_REQUIRED_INCLUDES)
>> + set(MACRO_CHECK_FUNCTION_EXISTS_NOT_STUB_INCLUDES
>> + "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
>> + else()
>> + set(MACRO_CHECK_FUNCTION_EXISTS_NOT_STUB_INCLUDES)
>> + endif()
>> + set(MACRO_CHECK_FUNCTION_EXISTS_NOT_STUB_FLAGS ${CMAKE_REQUIRED_FLAGS})
>> + try_compile(${VARIABLE}
>> + ${CMAKE_BINARY_DIR}
>> + "${CSRC}"
>> + COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
>> + CMAKE_FLAGS
>> + "-DCOMPILE_DEFINITIONS:STRING=-DL_features_h -DL_AC_CHECK_FUNC=${FUNCTION} -DL_AC_CHECK_FUNC_stub='defined __stub_${FUNCTION} || defined __stub___${FUNCTION}'"
>> + "${MACRO_CHECK_FUNCTION_EXISTS_NOT_STUB_FLAGS}"
>> + "${MACRO_CHECK_FUNCTION_EXISTS_NOT_STUB_INCLUDES}"
>> + OUTPUT_VARIABLE OUTPUT
>> + )
>> + endif()
>> + if(${VARIABLE})
>> + set(${VARIABLE} 1 CACHE INTERNAL "Have function ${FUNCTION}")
>> + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
>> + "Determining if function ${FUNCTION} is a stub "
>> + "passed with the following output:\n"
>> + "${OUTPUT}\n\n")
>> + if(NOT CMAKE_REQUIRED_QUIET)
>> + message(STATUS "Looking for stubbed out ${FUNCTION} - no stub")
>> + endif()
>> + else()
>> + set(${VARIABLE} "" CACHE INTERNAL "Have function ${FUNCTION}")
>> + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
>> + "Determining if function ${FUNCTION} is a stub "
>> + "failed with the following output:\n"
>> + "${OUTPUT}\n\n")
>> + if(NOT CMAKE_REQUIRED_QUIET)
>> + message(STATUS "Looking for stubbed out ${FUNCTION} - stub found")
>> + endif()
>> + endif()
>> + endif()
>> +endmacro()
>> diff --git a/lib/interception/interception_linux.cc b/lib/interception/interception_linux.cc
>> index 6e908ac..c9b4a6e 100644
>> --- a/lib/interception/interception_linux.cc
>> +++ b/lib/interception/interception_linux.cc
>> @@ -24,11 +24,13 @@ bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
>> return real == wrapper;
>> }
>>
>> +#ifdef HAVE_DLVSYM
>> #if !defined(__ANDROID__) // android does not have dlvsym
>> void *GetFuncAddrVer(const char *func_name, const char *ver) {
>> return dlvsym(RTLD_NEXT, func_name, ver);
>> }
>> #endif // !defined(__ANDROID__)
>> +#endif // HAVE_DLVSYM
>>
>> } // namespace __interception
>>
>> diff --git a/lib/interception/interception_linux.h b/lib/interception/interception_linux.h
>> index d3f774b..4802fe5 100644
>> --- a/lib/interception/interception_linux.h
>> +++ b/lib/interception/interception_linux.h
>> @@ -25,7 +25,9 @@ namespace __interception {
>> // returns true if a function with the given name was found.
>> bool GetRealFunctionAddress(const char *func_name, uptr *func_addr,
>> uptr real, uptr wrapper);
>> +# ifdef HAVE_DLVSYM
>> void *GetFuncAddrVer(const char *func_name, const char *ver);
>> +# endif /* HAVE_DLVSYM */
>> } // namespace __interception
>>
>> #define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func) \
>> @@ -43,5 +45,12 @@ void *GetFuncAddrVer(const char *func_name, const char *ver);
>> INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)
>> #endif // !defined(__ANDROID__)
>>
>> +#ifndef HAVE_DLVSYM
>> +/* Undo marketing crap above. Probe functionality, use result to decide. */
>> +# undef INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD
>> +# define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
>> + INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)
>> +#endif
>> +
>> #endif // INTERCEPTION_LINUX_H
>> #endif // __linux__ || __FreeBSD__
>> diff --git a/lib/sanitizer_common/sanitizer_common_interceptors.inc b/lib/sanitizer_common/sanitizer_common_interceptors.inc
>> index 0d076a0..0a767d4 100644
>> --- a/lib/sanitizer_common/sanitizer_common_interceptors.inc
>> +++ b/lib/sanitizer_common/sanitizer_common_interceptors.inc
>> @@ -1273,33 +1273,43 @@ static void unpoison_glob_t(void *ctx, __sanitizer_glob_t *pglob) {
>>
>> static THREADLOCAL __sanitizer_glob_t *pglob_copy;
>>
>> +#ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> static void wrapped_gl_closedir(void *dir) {
>> COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
>> IndirectExternCall(pglob_copy->gl_closedir)(dir);
>> }
>> +#endif
>>
>> +#ifdef HAVE_GLOB_T_GL_READDIR
>> static void *wrapped_gl_readdir(void *dir) {
>> COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
>> return IndirectExternCall(pglob_copy->gl_readdir)(dir);
>> }
>> +#endif
>>
>> +#ifdef HAVE_GLOB_T_GL_OPENDIR
>> static void *wrapped_gl_opendir(const char *s) {
>> COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
>> COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
>> return IndirectExternCall(pglob_copy->gl_opendir)(s);
>> }
>> +#endif
>>
>> +#ifdef HAVE_GLOB_T_GL_LSTAT
>> static int wrapped_gl_lstat(const char *s, void *st) {
>> COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
>> COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
>> return IndirectExternCall(pglob_copy->gl_lstat)(s, st);
>> }
>> +#endif
>>
>> +#ifdef HAVE_GLOB_T_GL_STAT
>> static int wrapped_gl_stat(const char *s, void *st) {
>> COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
>> COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
>> return IndirectExternCall(pglob_copy->gl_stat)(s, st);
>> }
>> +#endif
>>
>> INTERCEPTOR(int, glob, const char *pattern, int flags,
>> int (*errfunc)(const char *epath, int eerrno),
>> @@ -1307,24 +1317,64 @@ INTERCEPTOR(int, glob, const char *pattern, int flags,
>> void *ctx;
>> COMMON_INTERCEPTOR_ENTER(ctx, glob, pattern, flags, errfunc, pglob);
>> __sanitizer_glob_t glob_copy = {
>> - 0, 0, 0,
>> - 0, wrapped_gl_closedir, wrapped_gl_readdir,
>> - wrapped_gl_opendir, wrapped_gl_lstat, wrapped_gl_stat};
>> + 0,
>> + 0,
>> + 0
>> +#ifdef HAVE_GLOB_T_GL_FLAGS
>> + ,0
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> + ,wrapped_gl_closedir
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_READDIR
>> + ,wrapped_gl_readdir
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_OPENDIR
>> + ,wrapped_gl_opendir
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_LSTAT
>> + ,wrapped_gl_lstat
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_STAT
>> + ,wrapped_gl_stat
>> +#endif
>> + };
>> +
>> if (flags & glob_altdirfunc) {
>> +#ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> Swap(pglob->gl_closedir, glob_copy.gl_closedir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_READDIR
>> Swap(pglob->gl_readdir, glob_copy.gl_readdir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_OPENDIR
>> Swap(pglob->gl_opendir, glob_copy.gl_opendir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_LSTAT
>> Swap(pglob->gl_lstat, glob_copy.gl_lstat);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_STAT
>> Swap(pglob->gl_stat, glob_copy.gl_stat);
>> +#endif
>> pglob_copy = &glob_copy;
>> }
>> int res = REAL(glob)(pattern, flags, errfunc, pglob);
>> if (flags & glob_altdirfunc) {
>> +#ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> Swap(pglob->gl_closedir, glob_copy.gl_closedir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_READDIR
>> Swap(pglob->gl_readdir, glob_copy.gl_readdir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_OPENDIR
>> Swap(pglob->gl_opendir, glob_copy.gl_opendir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_LSTAT
>> Swap(pglob->gl_lstat, glob_copy.gl_lstat);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_STAT
>> Swap(pglob->gl_stat, glob_copy.gl_stat);
>> +#endif
>> }
>> pglob_copy = 0;
>> if ((!res || res == glob_nomatch) && pglob) unpoison_glob_t(ctx, pglob);
>> @@ -1337,24 +1387,63 @@ INTERCEPTOR(int, glob64, const char *pattern, int flags,
>> void *ctx;
>> COMMON_INTERCEPTOR_ENTER(ctx, glob64, pattern, flags, errfunc, pglob);
>> __sanitizer_glob_t glob_copy = {
>> - 0, 0, 0,
>> - 0, wrapped_gl_closedir, wrapped_gl_readdir,
>> - wrapped_gl_opendir, wrapped_gl_lstat, wrapped_gl_stat};
>> + 0,
>> + 0,
>> + 0
>> +#ifdef HAVE_GLOB_T_GL_FLAGS
>> + ,0
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> + ,wrapped_gl_closedir
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_READDIR
>> + ,wrapped_gl_readdir
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_OPENDIR
>> + ,wrapped_gl_opendir
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_LSTAT
>> + ,wrapped_gl_lstat
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_STAT
>> + ,wrapped_gl_stat
>> +#endif
>> + };
>> if (flags & glob_altdirfunc) {
>> +#ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> Swap(pglob->gl_closedir, glob_copy.gl_closedir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_READDIR
>> Swap(pglob->gl_readdir, glob_copy.gl_readdir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_OPENDIR
>> Swap(pglob->gl_opendir, glob_copy.gl_opendir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_LSTAT
>> Swap(pglob->gl_lstat, glob_copy.gl_lstat);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_STAT
>> Swap(pglob->gl_stat, glob_copy.gl_stat);
>> +#endif
>> pglob_copy = &glob_copy;
>> }
>> int res = REAL(glob64)(pattern, flags, errfunc, pglob);
>> if (flags & glob_altdirfunc) {
>> +#ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> Swap(pglob->gl_closedir, glob_copy.gl_closedir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_READDIR
>> Swap(pglob->gl_readdir, glob_copy.gl_readdir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_OPENDIR
>> Swap(pglob->gl_opendir, glob_copy.gl_opendir);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_LSTAT
>> Swap(pglob->gl_lstat, glob_copy.gl_lstat);
>> +#endif
>> +#ifdef HAVE_GLOB_T_GL_STAT
>> Swap(pglob->gl_stat, glob_copy.gl_stat);
>> +#endif
>> }
>> pglob_copy = 0;
>> if ((!res || res == glob_nomatch) && pglob) unpoison_glob_t(ctx, pglob);
>> diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.cc b/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
>> index 9ae4870..645777f 100644
>> --- a/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
>> +++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
>> @@ -103,14 +103,18 @@
>> #endif
>>
>> #if SANITIZER_LINUX || SANITIZER_FREEBSD
>> +# ifdef HAVE_UTIME_H
>> # include <utime.h>
>> +# endif
>> # include <sys/ptrace.h>
>> #endif
>>
>> #if !SANITIZER_ANDROID
>> #include <ifaddrs.h>
>> #include <sys/ucontext.h>
>> +# ifdef HAVE_WORDEXP_H
>> #include <wordexp.h>
>> +# endif
>> #endif
>>
>> #if SANITIZER_LINUX && !SANITIZER_ANDROID
>> @@ -119,7 +123,9 @@
>> #include <net/if_ppp.h>
>> #include <netax25/ax25.h>
>> #include <netipx/ipx.h>
>> +# ifdef HAVE_NETROM_NETROM_H
>> #include <netrom/netrom.h>
>> +# endif
>> #include <rpc/xdr.h>
>> #include <scsi/scsi.h>
>> #include <sys/mtio.h>
>> @@ -128,7 +134,9 @@
>> #include <sys/statvfs.h>
>> #include <sys/timex.h>
>> #include <sys/user.h>
>> +# ifdef HAVE_SYS_USTAT_H
>> #include <sys/ustat.h>
>> +# endif
>> #include <linux/cyclades.h>
>> #include <linux/if_eql.h>
>> #include <linux/if_plip.h>
>> @@ -215,12 +223,16 @@ namespace __sanitizer {
>> #if SANITIZER_LINUX || SANITIZER_FREEBSD
>> unsigned struct_rlimit_sz = sizeof(struct rlimit);
>> unsigned struct_timespec_sz = sizeof(struct timespec);
>> +# ifdef HAVE_UTIME_H
>> unsigned struct_utimbuf_sz = sizeof(struct utimbuf);
>> +# endif
>> unsigned struct_itimerspec_sz = sizeof(struct itimerspec);
>> #endif // SANITIZER_LINUX || SANITIZER_FREEBSD
>>
>> #if SANITIZER_LINUX && !SANITIZER_ANDROID
>> +# ifdef HAVE_SYS_USTAT_H
>> unsigned struct_ustat_sz = sizeof(struct ustat);
>> +# endif
>> unsigned struct_rlimit64_sz = sizeof(struct rlimit64);
>> unsigned struct_statvfs64_sz = sizeof(struct statvfs64);
>> #endif // SANITIZER_LINUX && !SANITIZER_ANDROID
>> @@ -266,7 +278,9 @@ namespace __sanitizer {
>>
>> #if (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
>> int glob_nomatch = GLOB_NOMATCH;
>> +# ifdef GLOB_ALTDIRFUNC
>> int glob_altdirfunc = GLOB_ALTDIRFUNC;
>> +# endif
>> #endif
>>
>> #if SANITIZER_LINUX && !SANITIZER_ANDROID && \
>> @@ -370,7 +384,9 @@ namespace __sanitizer {
>> unsigned struct_kbkeycode_sz = sizeof(struct kbkeycode);
>> unsigned struct_kbsentry_sz = sizeof(struct kbsentry);
>> unsigned struct_mtconfiginfo_sz = sizeof(struct mtconfiginfo);
>> +# ifdef HAVE_NETROM_NETROM_H
>> unsigned struct_nr_parms_struct_sz = sizeof(struct nr_parms_struct);
>> +# endif
>> unsigned struct_scc_modem_sz = sizeof(struct scc_modem);
>> unsigned struct_scc_stat_sz = sizeof(struct scc_stat);
>> unsigned struct_serial_multiport_struct_sz
>> @@ -805,10 +821,18 @@ namespace __sanitizer {
>> unsigned IOCTL_SIOCAX25SETPARMS = SIOCAX25SETPARMS;
>> unsigned IOCTL_SIOCDEVPLIP = SIOCDEVPLIP;
>> unsigned IOCTL_SIOCIPXCFGDATA = SIOCIPXCFGDATA;
>> +# ifdef SIOCNRDECOBS
>> unsigned IOCTL_SIOCNRDECOBS = SIOCNRDECOBS;
>> +# endif
>> +# ifdef SIOCNRGETPARMS
>> unsigned IOCTL_SIOCNRGETPARMS = SIOCNRGETPARMS;
>> +# endif
>> +# ifdef SIOCNRRTCTL
>> unsigned IOCTL_SIOCNRRTCTL = SIOCNRRTCTL;
>> +# endif
>> +# ifdef SIOCNRSETPARMS
>> unsigned IOCTL_SIOCNRSETPARMS = SIOCNRSETPARMS;
>> +# endif
>> unsigned IOCTL_TIOCGSERIAL = TIOCGSERIAL;
>> unsigned IOCTL_TIOCSERGETMULTI = TIOCSERGETMULTI;
>> unsigned IOCTL_TIOCSERSETMULTI = TIOCSERSETMULTI;
>> @@ -890,12 +914,24 @@ CHECK_TYPE_SIZE(glob_t);
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_pathc);
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_pathv);
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_offs);
>> +# ifdef HAVE_GLOB_T_GL_FLAGS
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_flags);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_closedir);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_READDIR
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_readdir);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_OPENDIR
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_opendir);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_LSTAT
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_lstat);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_STAT
>> CHECK_SIZE_AND_OFFSET(glob_t, gl_stat);
>> +# endif
>> #endif
>>
>> CHECK_TYPE_SIZE(addrinfo);
>> @@ -967,11 +1003,17 @@ CHECK_TYPE_SIZE(sigset_t);
>> COMPILER_CHECK(sizeof(__sanitizer_sigaction) == sizeof(struct sigaction));
>> // Can't write checks for sa_handler and sa_sigaction due to them being
>> // preprocessor macros.
>> +#if HAVE_STRUCT_SIGACTION_SA_MASK_LAST
>> +CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_flags);
>> +CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_restorer);
>> +CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_mask);
>> +#else // HAVE_STRUCT_SIGACTION_SA_MASK_LAST
>> CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_mask);
>> CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_flags);
>> #if SANITIZER_LINUX
>> CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_restorer);
>> #endif
>> +#endif // HAVE_STRUCT_SIGACTION_SA_MASK_LAST
>>
>> #if SANITIZER_LINUX
>> CHECK_TYPE_SIZE(__sysctl_args);
>> @@ -991,7 +1033,7 @@ CHECK_TYPE_SIZE(__kernel_loff_t);
>> CHECK_TYPE_SIZE(__kernel_fd_set);
>> #endif
>>
>> -#if !SANITIZER_ANDROID
>> +#ifdef HAVE_WORDEXP_H
>> CHECK_TYPE_SIZE(wordexp_t);
>> CHECK_SIZE_AND_OFFSET(wordexp_t, we_wordc);
>> CHECK_SIZE_AND_OFFSET(wordexp_t, we_wordv);
>> diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.h b/lib/sanitizer_common/sanitizer_platform_limits_posix.h
>> index a780ee2..04c6a96 100644
>> --- a/lib/sanitizer_common/sanitizer_platform_limits_posix.h
>> +++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.h
>> @@ -478,7 +478,8 @@ namespace __sanitizer {
>> #elif SANITIZER_LINUX
>> struct __sanitizer_sigset_t {
>> // The size is determined by looking at sizeof of real sigset_t on linux.
>> - uptr val[128 / sizeof(uptr)];
>> + /* .. except this should be * sizeof(uptr), not '/', no? */
>> + uptr val[SIZEOF_SIGSET_T / sizeof(uptr)];
>> };
>> #elif SANITIZER_FREEBSD
>> struct __sanitizer_sigset_t {
>> @@ -487,6 +488,17 @@ namespace __sanitizer {
>> };
>> #endif
>>
>> +#if HAVE_STRUCT_SIGACTION_SA_MASK_LAST
>> + struct __sanitizer_sigaction {
>> + union {
>> + void (*sigaction)(int sig, void *siginfo, void *uctx);
>> + void (*handler)(int sig);
>> + };
>> + STRUCT_SIGACTION_SA_FLAGS_TYPE sa_flags;
>> + void (*sa_restorer)();
>> + __sanitizer_sigset_t sa_mask;
>> + };
>> +#else // HAVE_STRUCT_SIGACTION_SA_MASK_LAST
>> // Linux system headers define the 'sa_handler' and 'sa_sigaction' macros.
>> struct __sanitizer_sigaction {
>> union {
>> @@ -504,6 +516,7 @@ namespace __sanitizer {
>> void (*sa_restorer)();
>> #endif
>> };
>> +#endif // HAVE_STRUCT_SIGACTION_SA_MASK_LAST
>>
>> #if SANITIZER_FREEBSD
>> typedef __sanitizer_sigset_t __sanitizer_kernel_sigset_t;
>> @@ -588,13 +601,25 @@ namespace __sanitizer {
>> uptr gl_pathc;
>> char **gl_pathv;
>> uptr gl_offs;
>> +# ifdef HAVE_GLOB_T_GL_FLAGS
>> int gl_flags;
>> +# endif
>>
>> +# ifdef HAVE_GLOB_T_GL_CLOSEDIR
>> void (*gl_closedir)(void *dirp);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_READDIR
>> void *(*gl_readdir)(void *dirp);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_OPENDIR
>> void *(*gl_opendir)(const char *);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_LSTAT
>> int (*gl_lstat)(const char *, void *);
>> +# endif
>> +# ifdef HAVE_GLOB_T_GL_STAT
>> int (*gl_stat)(const char *, void *);
>> +# endif
>> };
>> # elif SANITIZER_FREEBSD
>> struct __sanitizer_glob_t {
>> diff --git a/lib/sanitizer_common/sanitizer_posix_libcdep.cc b/lib/sanitizer_common/sanitizer_posix_libcdep.cc
>> index bb6e587..973f698 100644
>> --- a/lib/sanitizer_common/sanitizer_posix_libcdep.cc
>> +++ b/lib/sanitizer_common/sanitizer_posix_libcdep.cc
>> @@ -73,7 +73,16 @@ void SleepForSeconds(int seconds) {
>> }
>>
>> void SleepForMillis(int millis) {
>> +#ifdef HAVE_NANOSLEEP
>> + struct timespec ts;
>> + ts.tv_sec = millis / 1000;
>> + ts.tv_nsec = (millis % 1000) * 1000000;
>> + nanosleep(&ts, NULL); /* could as well loop here */
>> +#elif defined HAVE_USLEEP
>> usleep(millis * 1000);
>> +# else
>> + dunno how to SleepForMillis
>> +#endif
>> }
>>
>> void Abort() {
>> diff --git a/make/platform/clang_linux.mk b/make/platform/clang_linux.mk
>> index c6921ea..5ce1567 100644
>> --- a/make/platform/clang_linux.mk
>> +++ b/make/platform/clang_linux.mk
>> @@ -74,6 +74,185 @@ Arch.dfsan-x86_64 := x86_64
>> Arch.lsan-x86_64 := x86_64
>> endif
>>
>> +# TryCompile2 compiler source flags
>> +# Returns exit code of running a compiler invocation.
>> +# Same as TryCompile but in outer scope, don't want to touch the other one
>> +TryCompile2 = \
>> + $(shell \
>> + cflags=""; \
>> + for flag in $(3); do \
>> + cflags="$$cflags $$flag"; \
>> + done; \
>> + $(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \
>> + echo $$?)
>> +
>> +# our conftest.c
>> +ct_c = $(ProjSrcRoot)/make/platform/clang_linux_test_libc.c
>> +
>> +HAVE_DLVSYM := 1
>> +HAVE_NETROM_NETROM_H := 1
>> +HAVE_GLOB_H := 1
>> +HAVE_NANOSLEEP := 1
>> +HAVE_GLOB_T_GL_CLOSEDIR := 1
>> +HAVE_GLOB_T_GL_FLAGS := 1
>> +HAVE_GLOB_T_GL_LSTAT := 1
>> +HAVE_GLOB_T_GL_OPENDIR := 1
>> +HAVE_GLOB_T_GL_READDIR := 1
>> +HAVE_GLOB_T_GL_STAT := 1
>> +HAVE_STRUCT_SIGACTION_SA_MASK_LAST := 0
>> +HAVE_SYS_USTAT_H := 1
>> +HAVE_USLEEP := 1
>> +HAVE_UTIME_H := 1
>> +HAVE_WORDEXP_H := 1
>> +SIZEOF_STRUCT_STATFS64 := 120
>> +SIZEOF_SIGSET_T := 128
>> +STRUCT_SIGACTION_SA_FLAGS_TYPE := int
>> +
>> +#ifneq ($(findstring -uclibc,$(CompilerTargetTriple)),)
>> +# does not work, cross-compilation seems to be non-working?
>> +ifeq ($(call TryCompile2,$(CC),$(ct_c) -DL_MAIN -DL_AC_CHECK_UCLIBC -DL_AC_CHECK_HEADER="<stdio.h>",),0)
>> + HAVE_DLVSYM :=
>> + HAVE_NETROM_NETROM_H :=
>> + STRUCT_SIGACTION_SA_FLAGS_TYPE := unsigned long
>> +ifneq ($(filter alpha%,$(CompilerTargetTriple)),)
>> + STRUCT_SIGACTION_SA_FLAGS_TYPE := unsigned
>> +endif
>> +ifneq ($(filter mips%,$(CompilerTargetTriple)),)
>> + STRUCT_SIGACTION_SA_FLAGS_TYPE := unsigned
>> +endif
>> + HAVE_STRUCT_SIGACTION_SA_MASK_LAST := 1
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) -DL_MAIN -DL_AC_CHECK_HEADER="<sys/ustat.h>",),0)
>> + HAVE_SYS_USTAT_H :=
>> +endif
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) -DL_MAIN -DL_AC_CHECK_HEADER="<utime.h>",),0)
>> + HAVE_UTIME_H :=
>> +endif
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) -DL_MAIN -DL_AC_CHECK_HEADER="<wordexp.h>",),0)
>> + HAVE_WORDEXP_H :=
>> +endif
>> +glob_h := -DL_AC_CHECK_HEADER="<glob.h>"
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) -DL_MAIN $(glob_h),),0)
>> + HAVE_GLOB_H :=
>> +endif
>> +# check for struct glob members (check for GNU extensions)
>> +glob_h += -DL_AC_STRUCT="glob_t"
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) $(glob_h) -DL_AC_CHECK_STRUCT_MEMBER=gl_flags,),0)
>> + HAVE_GLOB_T_GL_FLAGS :=
>> +endif
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) $(glob_h) -DL_AC_CHECK_STRUCT_MEMBER=gl_closedir,),0)
>> + HAVE_GLOB_T_GL_CLOSEDIR :=
>> +endif
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) $(glob_h) -DL_AC_CHECK_STRUCT_MEMBER=gl_readdir,),0)
>> + HAVE_GLOB_T_GL_READDIR :=
>> +endif
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) $(glob_h) -DL_AC_CHECK_STRUCT_MEMBER=gl_opendir,),0)
>> + HAVE_GLOB_T_GL_OPENDIR :=
>> +endif
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) $(glob_h) -DL_AC_CHECK_STRUCT_MEMBER=gl_lstat,),0)
>> + HAVE_GLOB_T_GL_LSTAT :=
>> +endif
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) $(glob_h) -DL_AC_CHECK_STRUCT_MEMBER=gl_stat,),0)
>> + HAVE_GLOB_T_GL_STAT :=
>> +endif
>> +# check misc functions
>> +# for __stub_* on glibc and uClibc including features.h is enough
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) -DL_features_h -DL_AC_CHECK_FUNC=nanosleep -DL_AC_CHECK_FUNC_stub="defined __stub_nanosleep || defined __stub___nanosleep",),0)
>> + HAVE_NANOSLEEP :=
>> +endif
>> +ifneq ($(call TryCompile2,$(CC),$(ct_c) -DL_features_h -DL_AC_CHECK_FUNC=usleep -DL_AC_CHECK_FUNC_stub="defined __stub_usleep || defined __stub___usleep",),0)
>> + HAVE_USLEEP :=
>> +endif
>> +
>> +# AC_CHECK_SIZEOF, in make
>> +define ac_check_sizeof
>> +$(shell \
>> +if test $$($(CC) $(1) -DL_AC_SIZEOF_GE=0 -o /dev/null > /dev/null 2> /dev/null; echo $$?) -eq 0; \
>> +then \
>> + ac_lo=0 ac_mid=0; \
>> + while :; \
>> + do \
>> + if test $$($(CC) $(1) -DL_AC_SIZEOF_LE=$$ac_mid -o /dev/null > /dev/null 2> /dev/null; echo $$?) -eq 0; then \
>> + ac_hi=$$ac_mid; \
>> + break; \
>> + else \
>> + ac_lo=$$(( $$ac_mid + 1 )); \
>> + if test $$ac_lo -le $$ac_mid; then ac_lo= ac_hi=; break; fi; \
>> + ac_mid=$$(( 2 * $$ac_mid + 1 )); \
>> + fi; \
>> + done; \
>> +else \
>> + if test $$($(CC) $(1) -DL_AC_SIZEOF_LT=0 -o /dev/null > /dev/null 2> /dev/null; echo $$?) -eq 0; then \
>> + ac_hi=-1 ac_mid=-1; \
>> + while :; \
>> + do \
>> + if test $$($(CC) $(1) -DL_AC_SIZEOF_GE=$$ac_mid -o /dev/null > /dev/null 2> /dev/null; echo $$?) -eq 0; then \
>> + ac_lo=$$ac_mid; \
>> + break; \
>> + else \
>> + ac_hi=$$(( ($$ac_mid) - 1 )); \
>> + if test $$ac_mid -le $$ac_hi; then ac_lo= ac_hi=; break; fi; \
>> + ac_mid=$$(( 2 * $$ac_mid )); \
>> + fi; \
>> + done; \
>> + else \
>> + ac_lo= ac_hi=; \
>> + fi; \
>> +fi; \
>> +while test "x$$ac_lo" != "x$$ac_hi"; \
>> +do \
>> + ac_mid=$$(( ($$ac_hi - $$ac_lo) / 2 + $$ac_lo )); \
>> + if test $$($(CC) $(1) -DL_AC_SIZEOF_LE=$$ac_mid -o /dev/null > /dev/null 2> /dev/null; echo $$?) -eq 0; then \
>> + ac_hi=$$ac_mid; \
>> + else \
>> + ac_lo=$$(( ($$ac_mid) + 1 )); \
>> + fi; \
>> +done; \
>> +echo $$(( $$ac_lo + 0 )); \
>> +)
>> +endef
>> +
>> +# determine sizeof sigset_t
>> +SIZEOF_SIGSET_T := $(call ac_check_sizeof,$(ct_c) -DL_AC_CHECK_HEADER="<signal.h>" -DL_AC_SIZEOF="sigset_t")
>> +
>> +# determine sizeof struct statfs64
>> +SIZEOF_STRUCT_STATFS64 := 0
>> +ifeq ($(call TryCompile2,$(CC),$(ct_c) -DL_MAIN -DL_AC_CHECK_HEADER="<sys/statfs.h>",),0)
>> +SIZEOF_STRUCT_STATFS64 := $(call ac_check_sizeof,$(ct_c) -DL_AC_CHECK_HEADER="<sys/statfs.h>" -DL_AC_SIZEOF="struct statfs64")
>> +else
>> + ifeq ($(call TryCompile2,$(CC),$(ct_c) -DL_MAIN -DL_AC_CHECK_HEADER="<sys/vfs.h>",),0)
>> + SIZEOF_STRUCT_STATFS64 := $(call ac_check_sizeof,$(ct_c) -DL_AC_CHECK_HEADER="<sys/vfs.h>" -DL_AC_SIZEOF="struct statfs64")
>> + endif
>> +endif
>> +# end of -uclibc handling
>> +endif
>> +
>> +define add_config_h_cppflag
>> +ifeq ($($(1)),)
>> +CONFIG_H_CPPFLAGS += -U$(1)
>> +else
>> +CONFIG_H_CPPFLAGS += '-D$(1)=$($(1))'
>> +endif
>> +endef
>> +
>> +CONFIG_H_CPPFLAGS :=
>> +$(eval $(call add_config_h_cppflag,HAVE_DLVSYM))
>> +$(eval $(call add_config_h_cppflag,HAVE_GLOB_H))
>> +$(eval $(call add_config_h_cppflag,HAVE_NANOSLEEP))
>> +$(eval $(call add_config_h_cppflag,HAVE_NETROM_NETROM_H))
>> +$(eval $(call add_config_h_cppflag,HAVE_GLOB_T_GL_CLOSEDIR))
>> +$(eval $(call add_config_h_cppflag,HAVE_GLOB_T_GL_FLAGS))
>> +$(eval $(call add_config_h_cppflag,HAVE_GLOB_T_GL_LSTAT))
>> +$(eval $(call add_config_h_cppflag,HAVE_GLOB_T_GL_OPENDIR))
>> +$(eval $(call add_config_h_cppflag,HAVE_GLOB_T_GL_READDIR))
>> +$(eval $(call add_config_h_cppflag,HAVE_GLOB_T_GL_STAT))
>> +$(eval $(call add_config_h_cppflag,HAVE_STRUCT_SIGACTION_SA_MASK_LAST))
>> +$(eval $(call add_config_h_cppflag,HAVE_SYS_USTAT_H))
>> +$(eval $(call add_config_h_cppflag,HAVE_USLEEP))
>> +$(eval $(call add_config_h_cppflag,HAVE_UTIME_H))
>> +$(eval $(call add_config_h_cppflag,HAVE_WORDEXP_H))
>> +$(eval $(call add_config_h_cppflag,SIZEOF_STRUCT_STATFS64))
>> +$(eval $(call add_config_h_cppflag,SIZEOF_SIGSET_T))
>> +$(eval $(call add_config_h_cppflag,STRUCT_SIGACTION_SA_FLAGS_TYPE))
>> endif
>>
>> ifneq ($(LLVM_ANDROID_TOOLCHAIN_DIR),)
>> @@ -87,6 +266,7 @@ endif
>>
>> CFLAGS := -Wall -Werror -O3 -fomit-frame-pointer
>> SANITIZER_CFLAGS := -fPIE -fno-builtin -gline-tables-only
>> +CFLAGS += $(CONFIG_H_CPPFLAGS)
>>
>> CFLAGS.full-i386 := $(CFLAGS) -m32
>> CFLAGS.full-x86_64 := $(CFLAGS) -m64
>> diff --git a/make/platform/clang_linux_test_libc.c b/make/platform/clang_linux_test_libc.c
>> new file mode 100644
>> index 0000000..2f9bba8
>> --- /dev/null
>> +++ b/make/platform/clang_linux_test_libc.c
>> @@ -0,0 +1,68 @@
>> +/* This file is used to check for libc characteristics and features */
>> +#ifdef L_features_h
>> +# include <features.h>
>> +#endif
>> +
>> +#ifdef L_AC_CHECK_HEADER
>> +/* compile-time check for availability of a header */
>> +# include L_AC_CHECK_HEADER
>> +#endif
>> +
>> +#ifdef L_AC_CHECK_UCLIBC
>> +# ifndef __UCLIBC__
>> +choke me /* not uClibc */
>> +# endif
>> +#endif
>> +
>> +#ifdef L_MAIN
>> +/* provide a dummy main for the linker */
>> +int main()
>> +{
>> + return 0;
>> +}
>> +#endif
>> +
>> +#ifdef L_AC_CHECK_STRUCT_MEMBER
>> +/* compile-time check for presence of struct member */
>> +int main()
>> +{
>> + static L_AC_STRUCT ac_aggr;
>> + if (ac_aggr.L_AC_CHECK_STRUCT_MEMBER)
>> + return 0;
>> + return 0;
>> +}
>> +#endif
>> +
>> +#ifdef L_AC_CHECK_FUNC
>> +/* check if function (or macro) is available */
>> +# ifdef __cplusplus
>> +extern "C"
>> +# endif
>> +# if L_AC_CHECK_FUNC_stub
>> +choke me /* function 'L_AC_CHECK_FUNC' stubbed out! */
>> +# endif
>> +char L_AC_CHECK_FUNC ();
>> +int main ()
>> +{
>> + return L_AC_CHECK_FUNC ();
>> +}
>> +#endif
>> +
>> +#ifdef L_AC_SIZEOF
>> +/* Determine sizeof expression */
>> +int main ()
>> +{
>> +# define s (long int) (sizeof (L_AC_SIZEOF))
>> +# if defined L_AC_SIZEOF_GE
>> + static int test_array [1 - 2 * !((s) >= L_AC_SIZEOF_GE)];
>> +# elif defined L_AC_SIZEOF_LE
>> + static int test_array [1 - 2 * !((s) <= L_AC_SIZEOF_LE)];
>> +# elif defined L_AC_SIZEOF_LT
>> + static int test_array [1 - 2 * !((s) < L_AC_SIZEOF_LT)];
>> +# else
>> +# error no such comparison operator
>> +# endif
>> + test_array [0] = 0;
>> + return 0;
>> +}
>> +#endif
>> --
>> 1.9.1
>>
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