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92 lines
3.4 KiB
C
92 lines
3.4 KiB
C
/*
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american fuzzy lop++ - forkserver header
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----------------------------------------
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Originally written by Michal Zalewski
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Forkserver design by Jann Horn <jannhorn@googlemail.com>
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Now maintained by Marc Heuse <mh@mh-sec.de>,
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Heiko Eißfeldt <heiko.eissfeldt@hexco.de>,
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Andrea Fioraldi <andreafioraldi@gmail.com>,
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Dominik Maier <mail@dmnk.co>>
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Copyright 2016, 2017 Google Inc. All rights reserved.
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Copyright 2019-2020 AFLplusplus Project. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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http://www.apache.org/licenses/LICENSE-2.0
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Shared code that implements a forkserver. This is used by the fuzzer
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as well the other components like afl-tmin.
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*/
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#ifndef __AFL_FORKSERVER_H
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#define __AFL_FORKSERVER_H
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#include <stdio.h>
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typedef struct afl_forkserver {
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/* a program that includes afl-forkserver needs to define these */
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u8 uses_asan; /* Target uses ASAN? */
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u8 *trace_bits; /* SHM with instrumentation bitmap */
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u8 use_stdin; /* use stdin for sending data */
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s32 fsrv_pid, /* PID of the fork server */
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child_pid, /* PID of the fuzzed program */
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out_dir_fd; /* FD of the lock file */
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s32 out_fd, /* Persistent fd for fsrv->out_file */
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#ifndef HAVE_ARC4RANDOM
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dev_urandom_fd, /* Persistent fd for /dev/urandom */
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#endif
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dev_null_fd, /* Persistent fd for /dev/null */
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fsrv_ctl_fd, /* Fork server control pipe (write) */
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fsrv_st_fd; /* Fork server status pipe (read) */
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u32 exec_tmout; /* Configurable exec timeout (ms) */
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u64 mem_limit; /* Memory cap for child (MB) */
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u8 *out_file, /* File to fuzz, if any */
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*target_path; /* Path of the target */
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FILE *plot_file; /* Gnuplot output file */
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u8 child_timed_out; /* Traced process timed out? */
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u8 use_fauxsrv; /* Fauxsrv for non-forking targets? */
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} afl_forkserver_t;
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void handle_timeout(int sig);
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void afl_fsrv_init(afl_forkserver_t *fsrv);
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void afl_fsrv_start(afl_forkserver_t *fsrv, char **argv);
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void afl_fsrv_deinit(afl_forkserver_t *fsrv);
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void afl_fsrv_killall();
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#ifdef __APPLE__
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#define MSG_FORK_ON_APPLE \
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" - On MacOS X, the semantics of fork() syscalls are non-standard and " \
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"may\n" \
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" break afl-fuzz performance optimizations when running " \
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"platform-specific\n" \
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" targets. To fix this, set AFL_NO_FORKSRV=1 in the environment.\n\n"
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#else
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#define MSG_FORK_ON_APPLE ""
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#endif
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#ifdef RLIMIT_AS
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#define MSG_ULIMIT_USAGE " ( ulimit -Sv $[%llu << 10];"
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#else
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#define MSG_ULIMIT_USAGE " ( ulimit -Sd $[%llu << 10];"
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#endif /* ^RLIMIT_AS */
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#endif
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