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Merge #18901: fuzz: use std::optional for sep_pos_opt variable

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420fa0770f37619bfa29898d59dac45b6a477abb fuzz: use std::optional for sep_pos variable (Harris)

Pull request description:

  This PR changes the original `size_t sep_pos` to `std::optional<size_t> sep_post_opt` to remove the warning when compiling fuzz tests.

  ```shell
  warning: variable 'sep_pos' may be uninitialized when used here [-Wconditional-uninitialized]
  ```

  Also, it adds `--enable-c++17` flag to CI fuzz scripts.

ACKs for top commit:
  practicalswift:
    ACK 420fa0770f37619bfa29898d59dac45b6a477abb
  MarcoFalke:
    ACK 420fa07

Tree-SHA512: e967d5d8ab8ee7394b243ff5b28bac72d30bd14774e4a206f8c87474fad22769da76e4ba4e03cbef83b8f60e5293e9d9293b613e2e2e59e187d4e59ae6b874ca
This commit is contained in:
MarcoFalke 2020-05-09 07:30:27 -04:00 committed by PastaPastaPasta
parent 1f49424788
commit b87625d738
3 changed files with 8 additions and 8 deletions
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2
ci/test/00_setup_env_native_fuzz.sh
View File

@ -15,4 +15,4 @@ export RUN_UNIT_TESTS=false
export RUN_INTEGRATION_TESTS=false
export RUN_FUZZ_TESTS=true
export GOAL="install"
export BITCOIN_CONFIG="--enable-zmq --disable-ccache --enable-fuzz --with-sanitizers=fuzzer,address,undefined CC=clang CXX=clang++"
export BITCOIN_CONFIG="--enable-zmq --disable-ccache --enable-fuzz --with-sanitizers=fuzzer,address,undefined --enable-c++17 CC=clang CXX=clang++"

2
ci/test/00_setup_env_native_fuzz_with_valgrind.sh
View File

@ -14,5 +14,5 @@ export RUN_FUNCTIONAL_TESTS=false
export RUN_FUZZ_TESTS=true
export FUZZ_TESTS_CONFIG="--valgrind"
export GOAL="install"
export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer CC=clang-8 CXX=clang++-8"
export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer --enable-c++17 CC=clang-8 CXX=clang++-8"
# Use clang-8, instead of default clang on bionic, which is clang-6 and does not come with libfuzzer on aarch64

12
src/test/fuzz/asmap_direct.cpp
View File

@ -7,6 +7,7 @@
#include <test/fuzz/fuzz.h>
#include <cstddef>
#include <optional>
#include <vector>
#include <assert.h>
@ -14,20 +15,19 @@
FUZZ_TARGET(asmap_direct)
{
// Encoding: [asmap using 1 bit / byte] 0xFF [addr using 1 bit / byte]
bool have_sep = false;
size_t sep_pos;
std::optional<size_t> sep_pos_opt;
for (size_t pos = 0; pos < buffer.size(); ++pos) {
uint8_t x = buffer[pos];
if ((x & 0xFE) == 0) continue;
if (x == 0xFF) {
if (have_sep) return;
have_sep = true;
sep_pos = pos;
if (sep_pos_opt) return;
sep_pos_opt = pos;
} else {
return;
}
}
if (!have_sep) return; // Needs exactly 1 separator
if (!sep_pos_opt) return; // Needs exactly 1 separator
const size_t sep_pos{sep_pos_opt.value()};
if (buffer.size() - sep_pos - 1 > 128) return; // At most 128 bits in IP address
// Checks on asmap