Mercurial > hg-stable
changeset 38207:36d55f90e2a3
fuzzutil: make it possible to use absl when C++17 isn't supported
Differential Revision: https://phab.mercurial-scm.org/D3676
| author | Augie Fackler <augie@google.com> |
|---|---|
| date | Mon, 30 Apr 2018 22:02:07 -0400 |
| parents | fa0ddd5e8fff |
| children | fbe239064064 |
| files | contrib/fuzz/Makefile contrib/fuzz/fuzzutil.cc contrib/fuzz/fuzzutil.h |
| diffstat | 3 files changed, 36 insertions(+), 8 deletions(-) [+] |
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--- a/contrib/fuzz/Makefile Sat Apr 28 22:18:50 2018 -0400 +++ b/contrib/fuzz/Makefile Mon Apr 30 22:02:07 2018 -0400 @@ -3,6 +3,10 @@ -std=c++17 \ -I../../mercurial -c -o fuzzutil.o fuzzutil.cc +fuzzutil-oss-fuzz.o: fuzzutil.cc fuzzutil.h + $$CXX $$CXXFLAGS -std=c++17 \ + -I../../mercurial -c -o fuzzutil-oss-fuzz.o fuzzutil.cc + bdiff.o: ../../mercurial/bdiff.c $$CC $$CFLAGS -fsanitize=fuzzer-no-link,address -c -o bdiff.o \ ../../mercurial/bdiff.c @@ -15,9 +19,10 @@ bdiff-oss-fuzz.o: ../../mercurial/bdiff.c $$CC $$CFLAGS -c -o bdiff-oss-fuzz.o ../../mercurial/bdiff.c -bdiff_fuzzer: bdiff.cc bdiff-oss-fuzz.o fuzzutil.o +bdiff_fuzzer: bdiff.cc bdiff-oss-fuzz.o fuzzutil-oss-fuzz.o $$CXX $$CXXFLAGS -std=c++17 -I../../mercurial bdiff.cc \ - bdiff-oss-fuzz.o fuzzutil.o -lFuzzingEngine -o $$OUT/bdiff_fuzzer + bdiff-oss-fuzz.o fuzzutil-oss-fuzz.o -lFuzzingEngine -o \ + $$OUT/bdiff_fuzzer x%.o: ../../mercurial/thirdparty/xdiff/x%.c ../../mercurial/thirdparty/xdiff/*.h $$CC -g -O1 -fsanitize=fuzzer-no-link,address -c \ @@ -34,9 +39,9 @@ -o $@ \ $< -xdiff_fuzzer: xdiff.cc fuzz-xdiffi.o fuzz-xprepare.o fuzz-xutils.o fuzzutil.o +xdiff_fuzzer: xdiff.cc fuzz-xdiffi.o fuzz-xprepare.o fuzz-xutils.o fuzzutil-oss-fuzz.o $$CXX $$CXXFLAGS -std=c++17 -I../../mercurial xdiff.cc \ - fuzz-xdiffi.o fuzz-xprepare.o fuzz-xutils.o fuzzutil.o \ + fuzz-xdiffi.o fuzz-xprepare.o fuzz-xutils.o fuzzutil-oss-fuzz.o \ -lFuzzingEngine -o $$OUT/xdiff_fuzzer all: bdiff xdiff
--- a/contrib/fuzz/fuzzutil.cc Sat Apr 28 22:18:50 2018 -0400 +++ b/contrib/fuzz/fuzzutil.cc Mon Apr 30 22:02:07 2018 -0400 @@ -2,10 +2,10 @@ #include <utility> -std::optional<two_inputs> SplitInputs(const uint8_t *Data, size_t Size) +contrib::optional<two_inputs> SplitInputs(const uint8_t *Data, size_t Size) { if (!Size) { - return std::nullopt; + return contrib::nullopt; } // figure out a random point in [0, Size] to split our input. size_t left_size = (Data[0] / 255.0) * (Size - 1);
--- a/contrib/fuzz/fuzzutil.h Sat Apr 28 22:18:50 2018 -0400 +++ b/contrib/fuzz/fuzzutil.h Mon Apr 30 22:02:07 2018 -0400 @@ -2,8 +2,31 @@ #define CONTRIB_FUZZ_FUZZUTIL_H #include <iostream> #include <memory> +#include <stdint.h> + +/* Try and use std::optional, but failing that assume we'll have a + * workable https://abseil.io/ install on the include path to get + * their backport of std::optional. */ +#ifdef __has_include +#if __has_include(<optional>) && __cplusplus >= 201703L #include <optional> -#include <stdint.h> +#define CONTRIB_FUZZ_HAVE_STD_OPTIONAL +#endif +#endif +#ifdef CONTRIB_FUZZ_HAVE_STD_OPTIONAL +namespace contrib +{ +using std::nullopt; +using std::optional; +} /* namespace contrib */ +#else +#include "third_party/absl/types/optional.h" +namespace contrib +{ +using absl::nullopt; +using absl::optional; +} /* namespace contrib */ +#endif /* set DEBUG to 1 for a few debugging prints, or 2 for a lot */ #define DEBUG 0 @@ -19,6 +42,6 @@ }; /* Split a non-zero-length input into two inputs. */ -std::optional<two_inputs> SplitInputs(const uint8_t *Data, size_t Size); +contrib::optional<two_inputs> SplitInputs(const uint8_t *Data, size_t Size); #endif /* CONTRIB_FUZZ_FUZZUTIL_H */