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cargo-afl.rs
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cargo-afl.rs
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#[macro_use]
extern crate clap;
extern crate rustc_version;
extern crate xdg;
use std::env;
use std::ffi::OsStr;
use std::process::{self, Command};
#[path = "../common.rs"]
mod common;
fn main() {
if !common::archive_file_path().exists() {
let version = common::rustc_version();
eprintln!("AFL LLVM runtime is not built with Rust {}, run `cargo \
install --force afl` to build it.", version);
process::exit(1);
}
let _ = clap_app().get_matches();
let mut args = env::args().skip(2).peekable(); // skip `cargo` and `afl`
match args.peek().map(|s| &**s) {
Some("analyze") => run_afl(args, "afl-analyze"),
Some("cmin") => run_afl(args, "afl-cmin"),
Some("fuzz") => run_afl(args, "afl-fuzz"),
Some("gotcpu") => run_afl(args, "afl-got-cpu"),
Some("plot") => run_afl(args, "afl-plot"),
Some("showmap") => run_afl(args, "afl-showmap"),
Some("tmin") => run_afl(args, "afl-tmin"),
Some("whatsup") => run_afl(args, "afl-whatsup"),
_ => run_cargo(args),
}
}
fn clap_app() -> clap::App<'static, 'static> {
clap::App::new("cargo afl").bin_name("cargo").subcommand(
clap::SubCommand::with_name("afl")
.version(crate_version!())
.setting(clap::AppSettings::ArgRequiredElseHelp)
.setting(clap::AppSettings::TrailingVarArg)
.setting(clap::AppSettings::AllowExternalSubcommands)
.usage("cargo afl [SUBCOMMAND or Cargo SUBCOMMAND]")
.after_help(
"In addition to the subcommands above, Cargo subcommands are also \
supported (see `cargo help` for a list of all Cargo subcommands).",
)
.subcommand(
clap::SubCommand::with_name("analyze")
.about("Invoke afl-analyze")
.setting(clap::AppSettings::AllowLeadingHyphen)
.setting(clap::AppSettings::DisableHelpSubcommand)
.setting(clap::AppSettings::DisableVersion)
.arg(clap::Arg::with_name("h").short("h").hidden(true))
.arg(clap::Arg::with_name("help").long("help").hidden(true))
.arg(clap::Arg::with_name("afl-analyze args").multiple(true)),
)
.subcommand(
clap::SubCommand::with_name("cmin")
.about("Invoke afl-cmin")
.setting(clap::AppSettings::AllowLeadingHyphen)
.setting(clap::AppSettings::DisableHelpSubcommand)
.setting(clap::AppSettings::DisableVersion)
.arg(clap::Arg::with_name("h").short("h").hidden(true))
.arg(clap::Arg::with_name("help").long("help").hidden(true))
.arg(clap::Arg::with_name("afl-cmin args").multiple(true)),
)
.subcommand(
clap::SubCommand::with_name("fuzz")
.about("Invoke afl-fuzz")
.setting(clap::AppSettings::AllowLeadingHyphen)
.setting(clap::AppSettings::DisableHelpSubcommand)
.setting(clap::AppSettings::DisableVersion)
.arg(clap::Arg::with_name("h").short("h").hidden(true))
.arg(clap::Arg::with_name("help").long("help").hidden(true))
.arg(clap::Arg::with_name("afl-fuzz args").multiple(true)),
)
.subcommand(
clap::SubCommand::with_name("gotcpu")
.about("Invoke afl-gotcpu")
.setting(clap::AppSettings::AllowLeadingHyphen)
.setting(clap::AppSettings::DisableHelpSubcommand)
.setting(clap::AppSettings::DisableVersion)
.arg(clap::Arg::with_name("h").short("h").hidden(true))
.arg(clap::Arg::with_name("help").long("help").hidden(true))
.arg(clap::Arg::with_name("afl-gotcpu args").multiple(true)),
)
.subcommand(
clap::SubCommand::with_name("plot")
.about("Invoke afl-plot")
.setting(clap::AppSettings::AllowLeadingHyphen)
.setting(clap::AppSettings::DisableHelpSubcommand)
.setting(clap::AppSettings::DisableVersion)
.arg(clap::Arg::with_name("h").short("h").hidden(true))
.arg(clap::Arg::with_name("help").long("help").hidden(true))
.arg(clap::Arg::with_name("afl-plot args").multiple(true)),
)
.subcommand(
clap::SubCommand::with_name("showmap")
.about("Invoke afl-showmap")
.setting(clap::AppSettings::AllowLeadingHyphen)
.setting(clap::AppSettings::DisableHelpSubcommand)
.setting(clap::AppSettings::DisableVersion)
.arg(clap::Arg::with_name("h").short("h").hidden(true))
.arg(clap::Arg::with_name("help").long("help").hidden(true))
.arg(clap::Arg::with_name("afl-showmap args").multiple(true)),
)
.subcommand(
clap::SubCommand::with_name("tmin")
.about("Invoke afl-tmin")
.setting(clap::AppSettings::AllowLeadingHyphen)
.setting(clap::AppSettings::DisableHelpSubcommand)
.setting(clap::AppSettings::DisableVersion)
.arg(clap::Arg::with_name("h").short("h").hidden(true))
.arg(clap::Arg::with_name("help").long("help").hidden(true))
.arg(clap::Arg::with_name("afl-tmin args").multiple(true)),
)
.subcommand(
clap::SubCommand::with_name("whatsup")
.about("Invoke afl-whatsup")
.setting(clap::AppSettings::AllowLeadingHyphen)
.setting(clap::AppSettings::DisableHelpSubcommand)
.setting(clap::AppSettings::DisableVersion)
.arg(clap::Arg::with_name("h").short("h").hidden(true))
.arg(clap::Arg::with_name("help").long("help").hidden(true))
.arg(clap::Arg::with_name("afl-whatsup args").multiple(true)),
),
)
}
fn run_afl<I, S>(args: I, cmd: &str)
where
I: IntoIterator<Item = S>,
S: AsRef<OsStr>,
{
let cmd_path = common::afl_dir().join("bin").join(cmd);
let status = Command::new(cmd_path)
.args(args.into_iter().skip(1)) // skip afl sub-command
.status()
.unwrap();
process::exit(status.code().unwrap_or(1));
}
fn run_cargo<I, S>(args: I)
where
I: IntoIterator<Item = S>,
S: AsRef<OsStr>,
{
let cargo_path = env!("CARGO");
// add some flags to sanitizers to make them work with Rust code
let asan_options = env::var("ASAN_OPTIONS").unwrap_or_default();
let asan_options = format!("detect_odr_violation=0:{}", asan_options);
let tsan_options = env::var("TSAN_OPTIONS").unwrap_or_default();
let tsan_options = format!("report_signal_unsafe=0:{}", tsan_options);
let mut rustflags = format!(
"--cfg fuzzing \
-C debug-assertions \
-C overflow_checks \
-C passes=sancov \
-C llvm-args=-sanitizer-coverage-level=3 \
-C llvm-args=-sanitizer-coverage-trace-pc-guard \
-C llvm-args=-sanitizer-coverage-prune-blocks=0 \
-C opt-level=3 \
-C target-cpu=native \
-C debuginfo=0 \
-l afl-llvm-rt \
-L {} ",
common::afl_llvm_rt_dir().display()
);
// RUSTFLAGS are not used by rustdoc, instead RUSTDOCFLAGS are used. Since
// doctests will try to link against afl-llvm-rt, set up RUSTDOCFLAGS to
// have doctests built the same as other code to avoid issues with doctests.
let mut rustdocflags = format!(
"--cfg fuzzing \
-C debug-assertions \
-C overflow_checks \
-C passes=sancov \
-C llvm-args=-sanitizer-coverage-level=3 \
-C llvm-args=-sanitizer-coverage-trace-pc-guard \
-C llvm-args=-sanitizer-coverage-prune-blocks=0 \
-C opt-level=3 \
-C target-cpu=native \
-C debuginfo=0 \
-L {} ",
common::afl_llvm_rt_dir().display()
);
if cfg!(linux) {
// work around https://github.com/rust-fuzz/afl.rs/issues/141 /
// https://github.com/rust-lang/rust/issues/53945, can be removed once
// those are fixed.
rustflags.push_str("-Clink-arg=-fuse-ld=gold");
rustdocflags.push_str("-Clink-arg=-fuse-ld=gold");
}
// add user provided flags
rustflags.push_str(&env::var("RUSTFLAGS").unwrap_or_default());
rustdocflags.push_str(&env::var("RUSTDOCFLAGS").unwrap_or_default());
let status = Command::new(cargo_path)
.args(args) // skip `cargo` and `afl`
.env("RUSTFLAGS", &rustflags)
.env("RUSTDOCFLAGS", &rustdocflags)
.env("ASAN_OPTIONS", asan_options)
.env("TSAN_OPTIONS", tsan_options)
.status()
.unwrap();
process::exit(status.code().unwrap_or(1));
}