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AFLplusplus/llvm_mode/afl-ld.c
van Hauser 35720304be not all opt are compiled with polly support
2020-03-16 20:10:42 +01:00

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/*
american fuzzy lop++ - wrapper for GNU ld
-----------------------------------------
Written by Marc Heuse <mh@mh-sec.de> for afl++
Maintained by Marc Heuse <mh@mh-sec.de>,
Heiko Eißfeldt <heiko.eissfeldt@hexco.de>
Andrea Fioraldi <andreafioraldi@gmail.com>
Dominik Maier <domenukk@gmail.com>
Copyright 2019-2020 AFLplusplus Project. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at:
http://www.apache.org/licenses/LICENSE-2.0
The sole purpose of this wrapper is to preprocess clang LTO files before
linking by ld and perform the instrumentation on the whole program.
*/
#define AFL_MAIN
#include "config.h"
#include "types.h"
#include "debug.h"
#include "alloc-inl.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <dirent.h>
#define MAX_PARAM_COUNT 4096
static u8 **ld_params, /* Parameters passed to the real 'ld' */
**link_params, /* Parameters passed to 'llvm-link' */
**opt_params, /* Parameters passed to 'opt' opt */
**inst_params; /* Parameters passed to 'opt' inst */
static u8 *input_file; /* Originally specified input file */
static u8 *final_file, /* Instrumented file for the real 'ld' */
*linked_file, /* file where we link all files */
*modified_file; /* file that was optimized before instr */
static u8 *afl_path = AFL_PATH;
static u8 *real_ld = AFL_REAL_LD;
static u8 cwd[4096];
static u8 *tmp_dir;
static u8 *ar_dir;
static u8 ar_dir_cnt;
static u8 *libdirs[254];
static u8 libdir_cnt;
static u8 be_quiet, /* Quiet mode (no stderr output) */
debug, /* AFL_DEBUG */
passthrough, /* AFL_LD_PASSTHROUGH - no link+optimize*/
we_link, /* we have bc/ll -> link + optimize */
just_version; /* Just show version? */
static u32 ld_param_cnt = 1, /* Number of params to 'ld' */
link_param_cnt = 1, /* Number of params to 'llvm-link' */
opt_param_cnt = 1, /* Number of params to 'opt' opt */
inst_param_cnt = 1; /* Number of params to 'opt' instr */
/* This function wipes a directory - our AR unpack directory in this case */
static u8 wipe_directory(u8 *path) {
DIR * d;
struct dirent *d_ent;
d = opendir(path);
if (!d) return 0;
while ((d_ent = readdir(d))) {
if (strcmp(d_ent->d_name, ".") != 0 && strcmp(d_ent->d_name, "..") != 0) {
u8 *fname = alloc_printf("%s/%s", path, d_ent->d_name);
if (unlink(fname)) PFATAL("Unable to delete '%s'", fname);
ck_free(fname);
}
}
closedir(d);
return !!rmdir(path);
}
/* remove temporary files on fatal errors */
static void at_exit_handler(void) {
if (!getenv("AFL_KEEP_ASSEMBLY")) {
if (linked_file) {
unlink(linked_file);
linked_file = NULL;
}
if (modified_file) {
unlink(modified_file);
modified_file = NULL;
}
if (final_file) {
unlink(final_file);
final_file = NULL;
}
if (ar_dir != NULL) {
wipe_directory(ar_dir);
ar_dir = NULL;
}
}
}
/* This function checks if the parameter is a) an existing file and b)
if it is a BC or LL file, if both are true it returns 1 and 0 otherwise */
int is_llvm_file(const char *file) {
int fd;
u8 buf[5];
if ((fd = open(file, O_RDONLY)) < 0) {
if (debug) SAYF(cMGN "[D] " cRST "File %s not found", file);
return 0;
}
if (read(fd, buf, 4) != 4) return 0;
buf[sizeof(buf) - 1] = 0;
close(fd);
if (strncmp(buf, "; Mo", 4) == 0) return 1;
if (buf[0] == 'B' && buf[1] == 'C' && buf[2] == 0xc0 && buf[3] == 0xde)
return 1;
return 0;
}
/* Return the current working directory, not thread safe ;-) */
u8 *getthecwd() {
static u8 fail[] = "";
if (getcwd(cwd, sizeof(cwd)) == NULL) return fail;
return cwd;
}
/* Check if an ar extracted file is already in the parameter list */
int is_duplicate(u8 **params, u32 ld_param_cnt, u8 *ar_file) {
for (uint32_t i = 0; i < ld_param_cnt; i++)
if (params[i] != NULL)
if (strcmp(params[i], ar_file) == 0) return 1;
return 0;
}
/* Examine and modify parameters to pass to 'ld', 'llvm-link' and 'llmv-ar'.
Note that the file name is always the last parameter passed by GCC,
so we exploit this property to keep the code "simple". */
static void edit_params(int argc, char **argv) {
u32 i, have_lto = 0, libdir_index;
u8 libdir_file[4096];
if (tmp_dir == NULL) {
tmp_dir = getenv("TMPDIR");
if (!tmp_dir) tmp_dir = getenv("TEMP");
if (!tmp_dir) tmp_dir = getenv("TMP");
if (!tmp_dir) tmp_dir = "/tmp";
}
linked_file =
alloc_printf("%s/.afl-%u-%u-1.ll", tmp_dir, getpid(), (u32)time(NULL));
modified_file =
alloc_printf("%s/.afl-%u-%u-2.bc", tmp_dir, getpid(), (u32)time(NULL));
final_file =
alloc_printf("%s/.afl-%u-%u-3.bc", tmp_dir, getpid(), (u32)time(NULL));
ld_params = ck_alloc(4096 * sizeof(u8 *));
link_params = ck_alloc(4096 * sizeof(u8 *));
inst_params = ck_alloc(12 * sizeof(u8 *));
opt_params = ck_alloc(12 * sizeof(u8 *));
ld_params[0] = (u8 *)real_ld;
ld_params[ld_param_cnt++] = "--allow-multiple-definition";
link_params[0] = alloc_printf("%s/%s", LLVM_BINDIR, "llvm-link");
link_params[link_param_cnt++] = "-S"; // we create the linked file as .ll
link_params[link_param_cnt++] = "-o";
link_params[link_param_cnt++] = linked_file;
opt_params[0] = alloc_printf("%s/%s", LLVM_BINDIR, "opt");
if (getenv("AFL_DONT_OPTIMIZE") == NULL)
opt_params[opt_param_cnt++] = "-O3";
else
opt_params[opt_param_cnt++] = "-O0";
// opt_params[opt_param_cnt++] = "-S"; // only when debugging
opt_params[opt_param_cnt++] = linked_file; // input: .ll file
opt_params[opt_param_cnt++] = "-o";
opt_params[opt_param_cnt++] = modified_file; // output: .bc file
inst_params[0] = alloc_printf("%s/%s", LLVM_BINDIR, "opt");
inst_params[inst_param_cnt++] =
alloc_printf("--load=%s/afl-llvm-lto-instrumentation.so", afl_path);
// inst_params[inst_param_cnt++] = "-S"; // only when debugging
inst_params[inst_param_cnt++] = "--disable-opt";
inst_params[inst_param_cnt++] = "--afl-lto";
inst_params[inst_param_cnt++] = modified_file; // input: .bc file
inst_params[inst_param_cnt++] = "-o";
inst_params[inst_param_cnt++] = final_file; // output: .bc file
// first we must collect all library search paths
for (i = 1; i < argc; i++)
if (strlen(argv[i]) > 2 && argv[i][0] == '-' && argv[i][1] == 'L')
libdirs[libdir_cnt++] = argv[i] + 2;
// then we inspect all options to the target linker
for (i = 1; i < argc; i++) {
if (ld_param_cnt >= MAX_PARAM_COUNT || link_param_cnt >= MAX_PARAM_COUNT)
FATAL(
"Too many command line parameters because of unpacking .a archives, "
"this would need to be done by hand ... sorry! :-(");
if (strncmp(argv[i], "-flto", 5) == 0) have_lto = 1;
if (!strcmp(argv[i], "-version")) {
just_version = 1;
ld_params[1] = argv[i];
ld_params[2] = NULL;
final_file = input_file;
return;
}
if (strcmp(argv[i], "--afl") == 0) {
if (!be_quiet) OKF("afl++ test command line flag detected, exiting.");
exit(0);
}
// if a -l library is linked and no .so is found but an .a archive is there
// then the archive will be used. So we have to emulate this and check
// if an archive will be used and if yes we will instrument it too
libdir_file[0] = 0;
libdir_index = libdir_cnt;
if (strncmp(argv[i], "-l", 2) == 0 && libdir_cnt > 0 &&
strncmp(argv[i], "-lgcc", 5) != 0) {
u8 found = 0;
for (uint32_t j = 0; j < libdir_cnt && !found; j++) {
snprintf(libdir_file, sizeof(libdir_file), "%s/lib%s%s", libdirs[j],
argv[i] + 2, ".so");
if (access(libdir_file, R_OK) != 0) { // no .so found?
snprintf(libdir_file, sizeof(libdir_file), "%s/lib%s%s", libdirs[j],
argv[i] + 2, ".a");
if (access(libdir_file, R_OK) == 0) { // but .a found?
libdir_index = j;
found = 1;
if (debug) SAYF(cMGN "[D] " cRST "Found %s\n", libdir_file);
}
} else {
found = 1;
if (debug) SAYF(cMGN "[D] " cRST "Found %s\n", libdir_file);
}
}
}
// is the parameter an .a AR archive? If so, unpack and check its files
if (libdir_index < libdir_cnt ||
(argv[i][0] != '-' && strlen(argv[i]) > 2 &&
argv[i][strlen(argv[i]) - 1] == 'a' &&
argv[i][strlen(argv[i]) - 2] == '.')) {
// This gets a bit odd. I encountered several .a files being linked and
// where the same "foo.o" was in both .a archives. llvm-link does not
// like this so we have to work around that ...
u8 this_wd[4096], *this_ar;
u8 ar_params_cnt = 4;
u8 * ar_params[ar_params_cnt];
u8 * file = argv[i];
s32 pid, status;
DIR * arx;
struct dirent *dir_ent;
if (libdir_index < libdir_cnt) file = libdir_file;
if (ar_dir_cnt == 0) { // first archive, we setup up the basics
ar_dir = alloc_printf("%s/.afl-%u-%u.dir", tmp_dir, getpid(),
(u32)time(NULL));
if (mkdir(ar_dir, 0700) != 0)
FATAL("can not create temporary directory %s", ar_dir);
}
if (getcwd(this_wd, sizeof(this_wd)) == NULL)
FATAL("can not get the current working directory");
if (chdir(ar_dir) != 0)
FATAL("can not chdir to temporary directory %s", ar_dir);
if (file[0] == '/')
this_ar = file;
else
this_ar = alloc_printf("%s/%s", this_wd, file);
ar_params[0] = alloc_printf("%s/%s", LLVM_BINDIR, "llvm-ar");
ar_params[1] = "x";
ar_params[2] = this_ar;
ar_params[3] = NULL;
if (!be_quiet) OKF("Running ar unpacker on %s into %s", this_ar, ar_dir);
if (debug) {
SAYF(cMGN "[D]" cRST " cd \"%s\";", getthecwd());
for (uint32_t j = 0; j < ar_params_cnt; j++)
SAYF(" \"%s\"", ar_params[j]);
SAYF("\n");
}
if (!(pid = fork())) {
execvp(ar_params[0], (char **)ar_params);
FATAL("Oops, failed to execute '%s'", ar_params[0]);
}
if (pid < 0) FATAL("fork() failed");
if (waitpid(pid, &status, 0) <= 0) FATAL("waitpid() failed");
if (WEXITSTATUS(status) != 0) exit(WEXITSTATUS(status));
if (chdir(this_wd) != 0)
FATAL("can not chdir back to our working directory %s", this_wd);
if (!(arx = opendir(ar_dir))) FATAL("can not open directory %s", ar_dir);
while ((dir_ent = readdir(arx)) != NULL) {
u8 *ar_file = alloc_printf("%s/%s", ar_dir, dir_ent->d_name);
if (dir_ent->d_name[strlen(dir_ent->d_name) - 1] == 'o' &&
dir_ent->d_name[strlen(dir_ent->d_name) - 2] == '.') {
if (passthrough || is_llvm_file(ar_file) == 0) {
if (is_duplicate(ld_params, ld_param_cnt, ar_file) == 0) {
ld_params[ld_param_cnt++] = ar_file;
if (debug)
SAYF(cMGN "[D] " cRST "not a LTO link file: %s\n", ar_file);
}
} else {
if (is_duplicate(link_params, link_param_cnt, ar_file) == 0) {
if (we_link == 0) { // we have to honor order ...
ld_params[ld_param_cnt++] = final_file;
we_link = 1;
}
link_params[link_param_cnt++] = ar_file;
if (debug) SAYF(cMGN "[D] " cRST "is a link file: %s\n", ar_file);
}
}
} else
if (dir_ent->d_name[0] != '.' && !be_quiet)
WARNF("Unusual file found in ar archive %s: %s", argv[i], ar_file);
}
closedir(arx);
ar_dir_cnt++;
continue;
}
if (passthrough || argv[i][0] == '-' || is_llvm_file(argv[i]) == 0) {
// -O3 fucks up the CFG and instrumentation, so we downgrade to O2
// which is as we want things. Lets hope this is not too different
// in the various llvm versions!
if (strncmp(argv[i], "-plugin-opt=O", 13) == 0 &&
!getenv("AFL_DONT_OPTIMIZE"))
ld_params[ld_param_cnt++] = "-plugin-opt=O2";
else
ld_params[ld_param_cnt++] = argv[i];
} else {
if (we_link == 0) { // we have to honor order ...
ld_params[ld_param_cnt++] = final_file;
we_link = 1;
}
link_params[link_param_cnt++] = argv[i];
}
}
// if (have_lto == 0) ld_params[ld_param_cnt++] = AFL_CLANG_FLTO; // maybe we
// should not ...
ld_params[ld_param_cnt] = NULL;
link_params[link_param_cnt] = NULL;
opt_params[opt_param_cnt] = NULL;
inst_params[inst_param_cnt] = NULL;
}
/* clean AFL_PATH from PATH */
void clean_path() {
char *tmp, *newpath = NULL, *path = getenv("PATH");
u8 done = 0;
if (debug)
SAYF(cMGN "[D]" cRST " old PATH=%s, AFL_PATH=%s\n", path, AFL_PATH);
// wipe AFL paths from PATH that we set
// we added two paths so we remove the two paths
while (!done) {
if (*path == 0)
done = 1;
else if (*path++ == ':')
done = 1;
}
while (*path == ':')
path++;
// AFL_PATH could be additionally in PATH so check and remove to not call our
// 'ld'
const size_t pathlen = strlen(path);
const size_t afl_pathlen = strlen(AFL_PATH);
newpath = malloc(pathlen + 1);
if (strcmp(AFL_PATH, "/bin") != 0 && strcmp(AFL_PATH, "/usr/bin") != 0 &&
afl_pathlen > 1 && (tmp = strstr(path, AFL_PATH)) != NULL && // it exists
(tmp == path ||
(tmp > path &&
tmp[-1] == ':')) && // either starts with it or has a colon before
(tmp + afl_pathlen == path + pathlen ||
(tmp + afl_pathlen <
path + (pathlen && tmp[afl_pathlen] ==
':')) // end with it or has a colon at the end
)) {
int one_colon = 1;
if (tmp > path) {
memcpy(newpath, path, tmp - path);
newpath[tmp - path - 1] = 0; // remove ':'
one_colon = 0;
}
if (tmp + afl_pathlen < path + pathlen) tmp += afl_pathlen + one_colon;
setenv("PATH", newpath, 1);
} else
setenv("PATH", path, 1);
if (debug) SAYF(cMGN "[D]" cRST " new PATH=%s\n", getenv("PATH"));
free(newpath);
}
/* Main entry point */
int main(int argc, char **argv) {
s32 pid, i;
int status;
u8 *ptr, exe[4096], exe2[4096], proc[32], val[2] = " ";
int have_afl_ld_caller = 0;
if (isatty(2) && !getenv("AFL_QUIET") && !getenv("AFL_DEBUG")) {
if (getenv("AFL_LD") != NULL)
SAYF(cCYA "afl-ld" VERSION cRST
" by Marc \"vanHauser\" Heuse <mh@mh-sec.de> (level %d)\n",
have_afl_ld_caller);
} else
be_quiet = 1;
if (getenv("AFL_DEBUG") != NULL) debug = 1;
if (getenv("AFL_PATH") != NULL) afl_path = getenv("AFL_PATH");
if (getenv("AFL_LD_PASSTHROUGH") != NULL) passthrough = 1;
if (getenv("AFL_REAL_LD") != NULL) real_ld = getenv("AFL_REAL_LD");
if (real_ld == NULL || strlen(real_ld) < 2) real_ld = "/bin/ld";
if (real_ld != NULL && real_ld[0] != '/')
real_ld = alloc_printf("/bin/%s", real_ld);
if ((ptr = getenv("AFL_LD_CALLER")) != NULL) have_afl_ld_caller = atoi(ptr);
val[0] = 0x31 + have_afl_ld_caller;
setenv("AFL_LD_CALLER", val, 1);
if (debug) {
SAYF(cMGN "[D] " cRST
"AFL_LD=%s, set AFL_LD_CALLER=%s, have_afl_ld_caller=%d, "
"real_ld=%s\n",
getenv("AFL_LD"), val, have_afl_ld_caller, real_ld);
SAYF(cMGN "[D]" cRST " cd \"%s\";", getthecwd());
for (i = 0; i < argc; i++)
SAYF(" \"%s\"", argv[i]);
SAYF("\n");
}
sprintf(proc, "/proc/%d/exe", getpid());
if (readlink(proc, exe, sizeof(exe) - 1) > 0) {
if (readlink(real_ld, exe2, sizeof(exe2) - 1) < 1) exe2[0] = 0;
exe[sizeof(exe) - 1] = 0;
exe[sizeof(exe2) - 1] = 0;
if (strcmp(exe, real_ld) == 0 || strcmp(exe, exe2) == 0)
PFATAL(cLRD "[!] " cRST
"Error: real 'ld' path points to afl-ld, set AFL_REAL_LD to "
"the real 'ld' program!");
}
if (have_afl_ld_caller > 1)
PFATAL(cLRD "[!] " cRST
"Error: afl-ld calls itself in a loop, set AFL_REAL_LD to the "
"real 'ld' program!");
if (argc < 2) {
SAYF(
"\n"
"This is a helper application for afl-fuzz. It is a wrapper around GNU "
"'ld',\n"
"executed by the toolchain whenever using "
"afl-clang-lto/afl-clang-lto++.\n"
"You probably don't want to run this program directly.\n\n"
"Environment variables:\n"
" AFL_LD_PASSTHROUGH do not link+optimize == no instrumentation\n"
" AFL_REAL_LD point to the real ld if necessary\n"
"\nafl-ld was compiled with the fixed real 'ld' path of %s and the "
"clang "
"bin path of %s\n\n",
real_ld, LLVM_BINDIR);
exit(1);
}
if (getenv("AFL_LD") == NULL) {
/* if someone install clang/ld into the same directory as afl++ then
they are out of luck ... */
if (have_afl_ld_caller == 1) { clean_path(); }
if (real_ld != NULL && strlen(real_ld) > 1) execvp(real_ld, argv);
execvp("ld", argv); // fallback
PFATAL("Oops, failed to execute 'ld' - check your PATH");
}
atexit(at_exit_handler); // ensure to wipe temp files if things fail
edit_params(argc, argv); // here most of the magic happens :-)
if (debug)
SAYF(cMGN "[D] " cRST
"param counts: ar:%u lib:%u ld:%u link:%u opt:%u instr:%u\n",
ar_dir_cnt, libdir_cnt, ld_param_cnt, link_param_cnt, opt_param_cnt,
inst_param_cnt);
if (!just_version) {
if (we_link == 0) {
if (!getenv("AFL_QUIET"))
WARNF("No LTO input file found, cannot instrument!");
} else {
/* first we link all files */
if (!be_quiet) OKF("Running bitcode linker, creating %s", linked_file);
if (debug) {
SAYF(cMGN "[D]" cRST " cd \"%s\";", getthecwd());
for (i = 0; i < link_param_cnt; i++)
SAYF(" \"%s\"", link_params[i]);
SAYF("\n");
}
if (!(pid = fork())) {
execvp(link_params[0], (char **)link_params);
FATAL("Oops, failed to execute '%s'", link_params[0]);
}
if (pid < 0) PFATAL("fork() failed");
if (waitpid(pid, &status, 0) <= 0) PFATAL("waitpid() failed");
if (WEXITSTATUS(status) != 0) {
SAYF(bSTOP RESET_G1 CURSOR_SHOW cRST cLRD
"\n[-] PROGRAM ABORT : " cRST);
SAYF(
"llvm-link failed! Probable causes:\n\n"
" #1 If the error is \"linking globals named '...': symbol "
"multiply defined\"\n"
" then there is nothing we can do - llvm-link is missing an "
"important feature\n\n"
" #2 If the error is \"expected top-level entity\" and then "
"binary output, this\n"
" is because the same file is present in different .a archives "
"in different\n"
" formats. This can be fixed by manual doing the steps afl-ld "
"is doing but\n"
" programmatically - sorry!\n\n");
exit(WEXITSTATUS(status));
}
/* then we perform an optimization on the collected objects files */
if (!be_quiet)
OKF("Performing optimization via opt, creating %s", modified_file);
if (debug) {
SAYF(cMGN "[D]" cRST " cd \"%s\";", getthecwd());
for (i = 0; i < opt_param_cnt; i++)
SAYF(" \"%s\"", opt_params[i]);
SAYF("\n");
}
if (!(pid = fork())) {
execvp(opt_params[0], (char **)opt_params);
FATAL("Oops, failed to execute '%s'", opt_params[0]);
}
if (pid < 0) PFATAL("fork() failed");
if (waitpid(pid, &status, 0) <= 0) PFATAL("waitpid() failed");
if (WEXITSTATUS(status) != 0) exit(WEXITSTATUS(status));
/* then we run the instrumentation through the optimizer */
if (!be_quiet)
OKF("Performing instrumentation via opt, creating %s", final_file);
if (debug) {
SAYF(cMGN "[D]" cRST " cd \"%s\";", getthecwd());
for (i = 0; i < inst_param_cnt; i++)
SAYF(" \"%s\"", inst_params[i]);
SAYF("\n");
}
if (!(pid = fork())) {
execvp(inst_params[0], (char **)inst_params);
FATAL("Oops, failed to execute '%s'", inst_params[0]);
}
if (pid < 0) PFATAL("fork() failed");
if (waitpid(pid, &status, 0) <= 0) PFATAL("waitpid() failed");
if (WEXITSTATUS(status) != 0) exit(WEXITSTATUS(status));
}
/* next step - run the linker! :-) */
}
if (!be_quiet) OKF("Running real linker %s", real_ld);
if (debug) {
SAYF(cMGN "[D]" cRST " cd \"%s\";", getthecwd());
for (i = 0; i < ld_param_cnt; i++)
SAYF(" \"%s\"", ld_params[i]);
SAYF("\n");
}
if (!(pid = fork())) {
clean_path();
unsetenv("AFL_LD");
if (strlen(real_ld) > 1) execvp(real_ld, (char **)ld_params);
execvp("ld", (char **)ld_params); // fallback
FATAL("Oops, failed to execute 'ld' - check your PATH");
}
if (pid < 0) PFATAL("fork() failed");
if (waitpid(pid, &status, 0) <= 0) PFATAL("waitpid() failed");
if (debug) SAYF(cMGN "[D] " cRST "linker result: %d\n", status);
if (!just_version) {
if (!getenv("AFL_KEEP_ASSEMBLY")) {
if (linked_file) {
unlink(linked_file);
linked_file = NULL;
}
if (modified_file) {
unlink(modified_file);
modified_file = NULL;
}
if (final_file) {
unlink(final_file);
final_file = NULL;
}
if (ar_dir != NULL) {
wipe_directory(ar_dir);
ar_dir = NULL;
}
} else {
if (!be_quiet) {
SAYF(
"[!] afl-ld: keeping link file %s, optimized bitcode %s and "
"instrumented bitcode %s",
linked_file, modified_file, final_file);
if (ar_dir_cnt > 0 && ar_dir)
SAYF(" and ar archive unpack directory %s", ar_dir);
SAYF("\n");
}
}
if (status == 0) {
if (!be_quiet) OKF("Linker was successful");
} else {
SAYF(cLRD "[-] " cRST
"Linker failed, please investigate and send a bug report. Most "
"likely an 'ld' option is incompatible with %s. Try "
"AFL_KEEP_ASSEMBLY=1 and AFL_DEBUG=1 for replaying.\n",
AFL_CLANG_FLTO);
}
}
exit(WEXITSTATUS(status));
}
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