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https://github.com/carbon-language/carbon-lang.git
synced 2026-10-02 22:02:51 +01:00
Chandler Carruth
954441c358
This teaches the driver library to track when its being used with fuzzing and disables the `clang` subcommand from actually running Clang. The Clang libraries have a large backlog of fuzzer-found issues that isn't being actively reduced, so we can't productively fuzz into it. This lets us more productively fuzz at the top level. This is also available on the command line itself, which should be useful if anyone wants to fuzz Carbon from the command line using tools like AFL -- they can inject this flag to avoid getting noise from the fuzzer hitting known issues in Clang.
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef CARBON_TOOLCHAIN_DRIVER_DRIVER_H_
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#define CARBON_TOOLCHAIN_DRIVER_DRIVER_H_
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#include "common/command_line.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include "toolchain/driver/driver_env.h"
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#include "toolchain/driver/driver_subcommand.h"
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namespace Carbon {
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// Command line interface driver.
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//
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// Provides simple API to parse and run command lines for Carbon. It is
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// generally expected to be used to implement command line tools for working
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// with the language.
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class Driver {
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public:
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// Constructs a driver with any error or informational output directed to a
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// specified stream.
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Driver(llvm::vfs::FileSystem& fs, const InstallPaths* installation,
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llvm::raw_pwrite_stream& output_stream,
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llvm::raw_pwrite_stream& error_stream)
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: driver_env_{.fs = fs,
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.installation = installation,
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.output_stream = output_stream,
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.error_stream = error_stream} {}
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// Parses the given arguments into both a subcommand to select the operation
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// to perform and any arguments to that subcommand.
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//
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// Returns true if the operation succeeds. If the operation fails, returns
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// false and any information about the failure is printed to the registered
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// error stream (stderr by default).
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auto RunCommand(llvm::ArrayRef<llvm::StringRef> args) -> DriverResult;
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// Configure the driver for fuzzing. This allows specific commands to error
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// rather than perform operations that aren't well behaved during fuzzing.
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auto SetFuzzing() -> void;
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private:
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DriverEnv driver_env_;
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};
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} // namespace Carbon
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#endif // CARBON_TOOLCHAIN_DRIVER_DRIVER_H_
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