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Scaffold for oss-fuzz, from Sergey Nizovtsev.

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This commit is contained in:
Nicholas Marriott
2020-11-09 16:41:55 +00:00
parent 0dcb6e5eb4
commit 3eb1519bd7
7 changed files with 159 additions and 3 deletions
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47
configure.ac
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@ -21,6 +21,26 @@ SAVED_CFLAGS="$CFLAGS"
SAVED_CPPFLAGS="$CPPFLAGS"
SAVED_LDFLAGS="$LDFLAGS"
# Is this oss-fuzz build?
AC_ARG_ENABLE(
fuzzing,
AC_HELP_STRING(--enable-fuzzing, build fuzzers)
)
AC_ARG_VAR(
FUZZING_LIBS,
AC_HELP_STRING(libraries to link fuzzing targets with)
)
# Set up convenient fuzzing defaults before initializing compiler.
if test "x$enable_fuzzing" = xyes; then
AC_DEFINE(NEED_FUZZING)
test "x$CC" == x && CC=clang
test "x$FUZZING_LIBS" == x && \
FUZZING_LIBS="-fsanitize=fuzzer"
test "x$SAVED_CFLAGS" == x && \
AM_CFLAGS="-g -fsanitize=fuzzer-no-link,address"
fi
# Set up the compiler in two different ways and say yes we may want to install.
AC_PROG_CC
AM_PROG_CC_C_O
@ -54,8 +74,11 @@ if test "x$enable_static" = xyes; then
LDFLAGS="$AM_LDFLAGS $SAVED_LDFLAGS"
fi
# Do we need fuzzers?
AM_CONDITIONAL(NEED_FUZZING, test "x$enable_fuzzing" = xyes)
# Is this gcc?
AM_CONDITIONAL(IS_GCC, test "x$GCC" = xyes)
AM_CONDITIONAL(IS_GCC, test "x$GCC" = xyes -a "x$enable_fuzzing" != xyes)
# Is this Sun CC?
AC_EGREP_CPP(
@ -117,8 +140,6 @@ AC_REPLACE_FUNCS([ \
getline \
getprogname \
memmem \
recallocarray \
reallocarray \
setenv \
setproctitle \
strcasestr \
@ -130,6 +151,26 @@ AC_REPLACE_FUNCS([ \
])
AC_FUNC_STRNLEN
# Clang sanitizers wrap reallocarray even if it isn't available on the target
# system. When compiled it always returns NULL and crashes the program. To
# detect this we need a more complicated test.
AC_MSG_CHECKING([for working reallocarray])
AC_RUN_IFELSE([AC_LANG_PROGRAM(
[#include <stdlib.h>],
[return (reallocarray(NULL, 1, 1) == NULL);]
)],
AC_MSG_RESULT(yes),
[AC_LIBOBJ(reallocarray) AC_MSG_RESULT([no])]
)
AC_MSG_CHECKING([for working recallocarray])
AC_RUN_IFELSE([AC_LANG_PROGRAM(
[#include <stdlib.h>],
[return (recallocarray(NULL, 1, 1, 1) == NULL);]
)],
AC_MSG_RESULT(yes),
[AC_LIBOBJ(recallocarray) AC_MSG_RESULT([no])]
)
# Look for clock_gettime. Must come before event_init.
AC_SEARCH_LIBS(clock_gettime, rt)