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Carbon fuzzing 3/3: added actual fuzzer implementation and a fuzzverter utility for investigating crashing protos (#1156)

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* finished fuzzer and added fuzzverter util

* fixed typo

* renamed cmd line params

* fixed libproto_mutator download path

* small fixes

* small fixes

* small fixes

* renamed sample corpus proto

* small fixes

* try building on github with LIBCPP_DEBUG enabled

* temporarily marked proto fuzzer as a manual test

* code review

* use a dedicated proto-fuzzer feature to work around LIBCPP_DEBUG=1 crash in proto code

* code review comments, added README.md

* minor fixes to the text

* Update bazel/cc_toolchains/clang_cc_toolchain_config.bzl

Co-authored-by: Jon Meow <jperkins@google.com>

* use Carbon source representation for "empty Main()" instead of text format proto representation

* fixed typo

* made FuzzerUtil produce the full carbon source (proto converted + Main if needed) to decrease code duplication a bit

* typo

* switched to text proto format per code review

* Update executable_semantics/prelude.h

Co-authored-by: Jon Meow <jperkins@google.com>

* Update executable_semantics/fuzzing/README.md

Co-authored-by: Jon Meow <jperkins@google.com>

* Update executable_semantics/fuzzing/README.md

Co-authored-by: Jon Meow <jperkins@google.com>

* Update executable_semantics/fuzzing/README.md

Co-authored-by: Jon Meow <jperkins@google.com>

* Update executable_semantics/fuzzing/README.md

Co-authored-by: Jon Meow <jperkins@google.com>

* Update executable_semantics/fuzzing/README.md

Co-authored-by: Jon Meow <jperkins@google.com>

* review comments

* removed unnecessary file mode variables

* Update executable_semantics/fuzzing/fuzzverter.cpp

Co-authored-by: Jon Meow <jperkins@google.com>

* Update executable_semantics/fuzzing/README.md

Co-authored-by: Jon Meow <jperkins@google.com>

* Update executable_semantics/fuzzing/README.md

Co-authored-by: Jon Meow <jperkins@google.com>

* code review comments

* Update executable_semantics/syntax/BUILD

Co-authored-by: Jon Meow <jperkins@google.com>

* buildifier

Co-authored-by: Jon Meow <jperkins@google.com>
This commit is contained in:
pk19604014
2022-04-11 16:47:03 -04:00
committed by GitHub
co-authored by Jon Meow
parent db0de1004f
commit 22462a0d7f
18 changed files with 497 additions and 20 deletions
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executable_semantics/main.cpp
+1 -18
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@@ -15,27 +15,10 @@
#include "executable_semantics/common/nonnull.h"
#include "executable_semantics/interpreter/exec_program.h"
#include "executable_semantics/syntax/parse.h"
#include "executable_semantics/syntax/prelude.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/InitLLVM.h"
// Adds the Carbon prelude to `declarations`.
static void AddPrelude(
std::string_view prelude_file_name, Carbon::Nonnull<Carbon::Arena*> arena,
std::vector<Carbon::Nonnull<Carbon::Declaration*>>* declarations) {
Carbon::ErrorOr<Carbon::AST> parse_result =
Carbon::Parse(arena, prelude_file_name, false);
if (!parse_result.ok()) {
// Try again with tracing, to help diagnose the problem.
Carbon::ErrorOr<Carbon::AST> trace_parse_result =
Carbon::Parse(arena, prelude_file_name, true);
FATAL() << "Failed to parse prelude: "
<< trace_parse_result.error().message();
}
const auto& prelude = *parse_result;
declarations->insert(declarations->begin(), prelude.declarations.begin(),
prelude.declarations.end());
}
// Prints an error message and returns error code value.
auto PrintError(const Carbon::Error& error) -> int {
llvm::errs() << error.message() << "\n";