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configure: improved test for undefined behavior sanitizer

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Added workaround for clang bug
This commit is contained in:
Evgeny Grin (Karlson2k)
2021-09-07 12:25:26 +03:00
parent be630f9d6b
commit e2a52a91c6
1 changed files with 77 additions and 29 deletions
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configure.ac
+77 -29
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@@ -2535,11 +2535,13 @@ AC_ARG_ENABLE([sanitizers],
[], [enable_sanitizers=no])
AS_VAR_IF([enable_sanitizers], ["yes"],
[
new_CFLAGS="$CFLAGS"
AS_UNSET([san_FLAGS]) # the sanitizer flags to be added to both CFLAGS and LDFLAGS
AS_UNSET([san_CFLAGS]) # the sanitizer flags to be added to CFLAGS
saved_CFLAGS="$CFLAGS"
AC_CACHE_CHECK([whether sanitizer parameter works for $CC],
[mhd_cv_cc_sanitizer_works],
[
CFLAGS="${new_CFLAGS} -fsanitize=wrongFeatureName"
CFLAGS="${saved_CFLAGS} -fsanitize=wrongFeatureName"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
[mhd_cv_cc_sanitizer_works=no], [mhd_cv_cc_sanitizer_works=yes])
]
@@ -2548,66 +2550,100 @@ AS_VAR_IF([enable_sanitizers], ["yes"],
[
AC_CACHE_CHECK([for address sanitizer], [mhd_cv_cc_sanitizer_address],
[
CFLAGS="${saved_CFLAGS} -fsanitize=address"
CFLAGS="${saved_CFLAGS} ${san_CFLAGS} ${san_FLAGS} -fsanitize=address"
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
[mhd_cv_cc_sanitizer_address=yes], [mhd_cv_cc_sanitizer_address=no])
]
)
AS_VAR_IF([mhd_cv_cc_sanitizer_address],["yes"],
[
new_CFLAGS="${new_CFLAGS} -fsanitize=address"
AX_APPEND_FLAG([-fsanitize=address], [san_FLAGS])
enabled_sanitizers="${enabled_sanitizers}${enabled_sanitizers:+, }address"
AC_CACHE_CHECK([for pointer compare sanitizer], [mhd_cv_cc_sanitizer_pointer_compare],
[
CFLAGS="${new_CFLAGS} -fsanitize=pointer-compare"
CFLAGS="${saved_CFLAGS} ${san_CFLAGS} ${san_FLAGS} -fsanitize=pointer-compare"
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
[mhd_cv_cc_sanitizer_pointer_compare=yes], [mhd_cv_cc_sanitizer_pointer_compare=no])
]
)
AS_VAR_IF([mhd_cv_cc_sanitizer_pointer_compare],["yes"],
[
new_CFLAGS="${new_CFLAGS} -fsanitize=pointer-compare"
AX_APPEND_FLAG([-fsanitize=pointer-compare], [san_FLAGS])
enabled_sanitizers="${enabled_sanitizers}${enabled_sanitizers:+, }pointer compare"
]
)
AC_CACHE_CHECK([for pointer subtract sanitizer], [mhd_cv_cc_sanitizer_pointer_subtract],
[
CFLAGS="${new_CFLAGS} -fsanitize=pointer-subtract"
CFLAGS="${saved_CFLAGS} ${san_CFLAGS} ${san_FLAGS} -fsanitize=pointer-subtract"
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
[mhd_cv_cc_sanitizer_pointer_subtract=yes], [mhd_cv_cc_sanitizer_pointer_subtract=no])
]
)
AS_VAR_IF([mhd_cv_cc_sanitizer_pointer_subtract],["yes"],
[
new_CFLAGS="${new_CFLAGS} -fsanitize=pointer-subtract"
AX_APPEND_FLAG([-fsanitize=pointer-subtract], [san_FLAGS])
enabled_sanitizers="${enabled_sanitizers}${enabled_sanitizers:+, }pointer subtract"
]
)
]
)
[dnl Ensure that '#' will be processed correctly
test_undf_prog='
#include <stdio.h>
void func_out_b(char *arr)
{
arr[0] = 0;
arr[16] = 2;
}
unsigned int int_deref(void *ptr)
{
return (*((int*)ptr)) + 2;
}
int func1(void)
{
char chr[16];
func_out_b (chr);
return int_deref(chr + 1) + int_deref(chr + 2);
}
int main(void)
{
unsigned long ulvar;
signed char ch1;
ulvar = -1 * func1();
ch1 = ulvar * 6UL;
printf("%lu\n", ulvar + ch1);
return 0;
}
'
]
AC_CACHE_CHECK([for undefined behavior sanitizer], [mhd_cv_cc_sanitizer_undefined],
[
CFLAGS="${new_CFLAGS} -fsanitize=undefined"
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS} -fsanitize=undefined"
AC_LINK_IFELSE([AC_LANG_SOURCE([${test_undf_prog}])],
[mhd_cv_cc_sanitizer_undefined=yes], [mhd_cv_cc_sanitizer_undefined=no])
]
)
AS_VAR_IF([mhd_cv_cc_sanitizer_undefined],["yes"],
[
new_CFLAGS="${new_CFLAGS} -fsanitize=undefined"
AX_APPEND_FLAG([-fsanitize=undefined], [san_FLAGS])
enabled_sanitizers="${enabled_sanitizers}${enabled_sanitizers:+, }undefined"
],
[
AC_CACHE_CHECK([for undefined behavior sanitizer with '-fsanitize-undefined-trap-on-error'], [mhd_cv_cc_sanitizer_undefined_trap],
[
CFLAGS="${new_CFLAGS} -fsanitize=undefined -fsanitize-undefined-trap-on-error"
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS} -fsanitize=undefined -fsanitize-undefined-trap-on-error"
AC_LINK_IFELSE([AC_LANG_SOURCE([${test_undf_prog}])],
[mhd_cv_cc_sanitizer_undefined_trap=yes], [mhd_cv_cc_sanitizer_undefined_trap=no])
]
)
AS_VAR_IF([mhd_cv_cc_sanitizer_undefined_trap], ["yes"],
[
new_CFLAGS="${new_CFLAGS} -fsanitize=undefined -fsanitize-undefined-trap-on-error"
AX_APPEND_FLAG([-fsanitize=undefined], [san_FLAGS])
AX_APPEND_FLAG([-fsanitize-undefined-trap-on-error], [san_FLAGS])
enabled_sanitizers="${enabled_sanitizers}${enabled_sanitizers:+, }undefined"
AC_MSG_WARN([Enabled sanitizer without run-time library, error reporting will be limited])
],
@@ -2617,14 +2653,16 @@ AS_VAR_IF([enable_sanitizers], ["yes"],
# Last resort
AC_CACHE_CHECK([for undefined behavior sanitizer with '-fsanitize-trap=all'], [mhd_cv_cc_sanitizer_undefined_trap_all],
[
CFLAGS="${new_CFLAGS} -fsanitize=undefined -fsanitize-undefined-trap-on-error"
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS} -fsanitize=undefined -fsanitize-trap=all"
AC_LINK_IFELSE([AC_LANG_SOURCE([${test_undf_prog}])],
[mhd_cv_cc_sanitizer_undefined_trap_all=yes], [mhd_cv_cc_sanitizer_undefined_trap_all=no])
]
)
AS_VAR_IF([mhd_cv_cc_sanitizer_undefined_trap_all],["yes"],
[
new_CFLAGS="${new_CFLAGS} -fsanitize=undefined -fsanitize-undefined-trap-on-error"
AX_APPEND_FLAG([-fsanitize=undefined], [san_FLAGS])
AX_APPEND_FLAG([-fsanitize-trap=all], [san_FLAGS])
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS} -fsanitize=undefined -fsanitize-trap=all"
enabled_sanitizers="${enabled_sanitizers}${enabled_sanitizers:+, }undefined"
AC_MSG_WARN([Enabled sanitizer without run-time library, error reporting will be limited])
]
@@ -2637,21 +2675,31 @@ AS_VAR_IF([enable_sanitizers], ["yes"],
)
AS_CASE(["$enabled_sanitizers"], [*undefined],
[
CFLAGS="${new_CFLAGS}"
AS_VAR_IF([mhd_cv_cc_sanitizer_undefined], ["yes"],[],
[
# A workaround for broken clang which is trying to use UBSan lib
# even when instructed to not use it
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS}"
AX_APPEND_LINK_FLAGS([-fsanitize-trap=implicit-conversion],
[san_FLAGS], [], [AC_LANG_SOURCE([${test_undf_prog}])])
]
)
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS}"
AX_APPEND_LINK_FLAGS([-fsanitize=bounds-strict -fsanitize=local-bounds -fsanitize=implicit-conversion -fsanitize=nullability-arg],
[new_CFLAGS], [])
[san_CFLAGS], [], [AC_LANG_SOURCE([${test_undf_prog}])])
]
)
AS_UNSET([test_undf_prog])
AC_CACHE_CHECK([for leak sanitizer], [mhd_cv_cc_sanitizer_leak],
[
CFLAGS="${new_CFLAGS} -fsanitize=leak"
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS} -fsanitize=leak"
AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
[mhd_cv_cc_sanitizer_leak=yes], [mhd_cv_cc_sanitizer_leak=no])
]
)
AS_VAR_IF([mhd_cv_cc_sanitizer_leak],["yes"],
[
new_CFLAGS="${new_CFLAGS} -fsanitize=leak"
AX_APPEND_FLAG([-fsanitize=leak], [san_FLAGS])
enabled_sanitizers="${enabled_sanitizers}${enabled_sanitizers:+, }leak"
]
)
@@ -2659,18 +2707,18 @@ AS_VAR_IF([enable_sanitizers], ["yes"],
[AC_MSG_ERROR([cannot find any sanitizer supported by $CC])])
AS_VAR_IF([mhd_cv_cc_sanitizer_address],["yes"],
[
new_CFLAGS="${new_CFLAGS} -D_FORTIFY_SOURCE=0"
CFLAGS="${new_CFLAGS}"
AX_APPEND_COMPILE_FLAGS([-Wp,-U_FORTIFY_SOURCE], [new_CFLAGS])
AX_APPEND_FLAG([-D_FORTIFY_SOURCE=0], [san_CFLAGS])
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS}"
AX_APPEND_COMPILE_FLAGS([-Wp,-U_FORTIFY_SOURCE], [san_CFLAGS])
],
[AC_MSG_WARN([$CC does not support address sanitizer])]
)
# Always stop on error
CFLAGS="${new_CFLAGS}"
AX_APPEND_COMPILE_FLAGS([-fno-sanitize-recover=all], [new_CFLAGS])
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS}"
AX_APPEND_COMPILE_FLAGS([-fno-sanitize-recover=all], [san_CFLAGS])
# Get better output for sanitizers error reporting
AX_APPEND_COMPILE_FLAGS([-fno-omit-frame-pointer -fno-common -fno-optimize-sibling-calls],
[new_CFLAGS])
[san_CFLAGS])
AM_ASAN_OPTIONS="exitcode=88:detect_leaks=1:strict_string_checks=1:detect_stack_use_after_return=1"
AM_ASAN_OPTIONS="${AM_ASAN_OPTIONS}:check_initialization_order=1:strict_init_order=1:redzone=64"
AM_ASAN_OPTIONS="${AM_ASAN_OPTIONS}:max_free_fill_size=1024:detect_invalid_pointer_pairs=3"
@@ -2683,8 +2731,8 @@ UBSAN_OPTIONS="$(AM_UBSAN_OPTIONS)" ; export UBSAN_OPTIONS ; \
LSAN_OPTIONS="$(AM_LSAN_OPTIONS)" ; export LSAN_OPTIONS ;'
]
)
CFLAGS="$new_CFLAGS"
AS_UNSET([new_CFLAGS])
CFLAGS="${saved_CFLAGS} ${san_FLAGS} ${san_CFLAGS}"
AS_UNSET([saved_CFLAGS])
]
)
AM_CONDITIONAL([USE_SANITIZERS],